CN1129406C - Extensible absortbent articles - Google Patents

Abstract

The present invention relates to absorbent articles such as sanitary napkins worn by women. More particularly, the present invention relates to absorbent articles, such as thin sanitary napkins, that are extensible, especially in the longitudinal direction.

Description

Extensile absorbing articles

Technical field

The present invention relates to the absorbent items such as mat that sanitary towel, pantiliner and incontinent person use.More particularly, the present invention relates to extensile sanitary towel, perhaps relate to particularly longitudinally extensile sanitary towel or rather.

Background technology

The absorbing articles such as mat that sanitary towel, pantiliner and incontinent person use are to be used to absorb and preserve liquid and other Excreta that human body discharges and to prevent make dirty health and medicated clothing.Sanitary towel is the class absorbing articles that the women uses, and it is positioned at the wearer usually near the position between two lower limbs of health perineal position.

In general, the disposable absorbent article of most of those types above-mentioned is made by inextensible material, that is to say not tensible under the effect of these materials (thereby making absorbing articles itself) power that produces when normally wearing.

Owing to lacking expansion service, absorbing articles brings a lot of important disadvantages for these absorbing articles.A most serious shortcoming is to feel there be not the comfortable like that of imagination when making these article of user wears.The wearer will experience to the health that makes the wearer and feel comfortably cool and can be fit to difference between extensile absorbing articles of wearer motion and the inextensible absorbing articles.Traditional sanitary towel can not move with wearer's underwear, causes sanitary towel to be offset.If sanitary towel has the stretching, extension performance, the underwear that will make sanitary towel be fit to the wearer better also can remain on the original position.

A lot of patent publications disclose the absorbing articles with extensile various parts.These achievements have been described: No. 2701567 patents of the U.S. of authorizing Smith in following patent, authorize the U.S.'s 3570493 patents of Olsson, authorize the U.S.'s 3653382 patents of people such as Easley, authorize No. 3717150 patents of the U.S. of Schwartz, authorize No. 4013816 patents of the U.S. of people such as Sabee, authorize No. 4041949 patents of the U.S. of Kozak, authorize No. 4166464 patents of the U.S. of Korpman, authorize No. 4533357 patents of the U.S. of Hall, authorize No. 4573991 patents of the U.S. of people such as Pieniak, authorize No. 4578070 patents of the U.S. of people such as Holtman, authorize No. 4596570 patents of the U.S. of people such as Jackson, authorize No. 4655760 patents of the U.S. of Morpman, authorize No. 4731066 patents of the U.S. of Korpman, authorize No. 4847134 patents of the U.S. of people such as Fahrenkrug, authorize No. 4891258 patents of the U.S. of people such as Fahrenkrug, authorize No. 4965122 patents of the U.S. of Morman, authorize No. 4992324 patents of the U.S. of Dube, authorize people's such as Gossens the U.S. 5011480 and the European patent application EP 450541A2 that submits to by people such as Morris.

Above listed publication the absorbing articles with one or more extendable members may be disclosed, and The present invention be directed to absorbing articles, sanitary towel for example, sanitary towel in certain embodiments is made of the parts that can stretch, so that adapt to wearer and wearer's underwear motion.The application also comprises a large amount of embodiment at the fit aspect that utilizes the improved properties absorbing articles that stretches.

Summary of the invention

The purpose of this invention is to provide absorbing articles, quite thin absorbent articles particularly is provided, for example is the sanitary towel that can extend or preferably can stretch.

Specific purposes of the present invention provide when wearing the absorbing articles that can longitudinally extend (preferably can stretch), so that improve comfort and fit.

According to the present invention, provide a kind of attached in the interior crotch district that is wearing, tensile absorbing articles with crotch district extension in described, described absorbing articles is sanitary towel or pantiliner, it has a longitudinal centre line,, a cross central line, an initial length, a transflective liquid side, a liquid-tight side, and absorption piece that is between described transflective liquid side and the described liquid-tight side, described absorption piece has end margin, wherein: described absorbing articles is in the masterpiece time spent that is subjected to being less than or equal to 1000 grams, can be elongated to more than or equal to 110% of its initial length along described longitudinal centre line, and the elongation of at least a portion is that at least a portion absorbing articles by the longitudinal medial of the end margin that is positioned at this absorption piece provides.

By description, can be expressly understood above-mentioned purpose of the present invention and other purpose below in conjunction with accompanying drawing.

The present invention will provide a kind of absorbing articles, for example sanitary towel.Sanitary towel of the present invention can extend.

Certain this sanitary towel can be tensile and/or broad ways (promptly laterally) along the direction of length (promptly vertical), and/or is tensile along other direction.But sanitary towel is elastic elongation preferably.

One embodiment of the present of invention sanitary towel is the top flat that is seen through liquid by a tensile energy, and a tensile absorbent cores and the tensile egative film that can not see through liquid are formed.Absorbent cores is fixed between top flat and the egative film, and top flat and egative film link together along the periphery place of sanitary towel.Sanitary towel comprises that also one is used to make sanitary towel to be attached to the fastener in crotch district in the wearer.Fastener can make the part section of sanitary towel longitudinally extend at least.

The various dissimilar structure of some parts that are suitable for above-mentioned sanitary towel will be described below, also will describe above-mentioned this sanitary towel integrally-built alternative embodiment.

Sanitary towel in several alternative embodiment is made of some tensile parts and some not extending parts.For example the top flat of sanitary towel and egative film are extensile, and the absorbent cores that is clipped between tensile top flat and the tensile egative film then is not extending.As the remodeling of this embodiment, the top flat of sanitary towel can be not extensible equally.

Outside description, specialize and limit claimed scope, be considered to constitute subject content of the present invention, will help to understand better the present invention below in conjunction with the description of accompanying drawing (ratio of these accompanying drawings is inaccurate) with claims.Same label is used for representing substantially the same parts in these figure.

Description of drawings

The top view that Fig. 1 is an extensile sanitary towel of the present invention under extended configuration not.

Fig. 2 is the generalized section of the sanitary towel shown in Fig. 1 at decomposing state lower edge Z-Z line.

Fig. 3 is that the sanitary towel shown in Fig. 1 is not with the bottom view of optional adhesive linkage.

Fig. 4 is the top view after the sanitary towel among Fig. 1 stretches.

Fig. 5 is the top view that has an extensile sanitary towel of the top flat that two optional limit tongues and and egative film heat merges.

Fig. 6 be health JINYAN 6-6 line among Fig. 5 simplification transverse cross-sectional view.

Fig. 7 is a similar transverse cross-sectional view of having simplified to Fig. 6, a kind of alternative layouts of each several part in the expression sanitary towel.

Fig. 8 shows the preference relation of the size that the amplitude that is applied to the extending force in the sanitary towel and sanitary towel extend corresponding to above-mentioned power.

Fig. 8 A one is illustrated in the plane graph of elongation state of the each several part of the sanitary towel on wearer's underwear.

Fig. 9 shows and makes the sanitary towel with " power barrier " extend the curve of required power.

Figure 10 and 11 schematic side view for the structure that is used for producing the power barrier.

The alternative top layer of Figure 12 for constituting by a kind of non-woven material and a kind of perforated membrane.

Figure 13 is a rough schematic view of a kind of top sheet materials of being made of with the non-woven fibre that tangles a kind of perforated membrane.

Figure 14 is the top view that has a kind of sanitary towel of a top flat, and described top flat is by a kind of non-woven fleece sheet and roughly constituted along the fiber (part in the fiber only is shown among the figure) of horizontal orientation.

Figure 15 is the photo in a cross section of an embodiment sanitary towel of an expression, and wherein Xia Mian fibrous layer has extended and bonded on the perforated membrane.

Figure 16 is a top view that has a kind of sanitary towel of a top flat, and described top flat is made of the fiber of a kind of elastic fabric and described fabric mat that (fabric is exaggerated manyfold in the drawings, and only shows the part of fabric among the figure.)

Figure 17 illustrated and has been used for the sheet of an extensible materials being cut into a kind of common process of one, and a kind of extensible materials bar of sending into operation with the certain angle direction of (or be with machine direction " oblique line ") by cutting prepares the technology of the top flat that multi-directionally stretches.

Figure 17 A is the plane graph of a film topsheet of sanitary towel, has on the top flat a plurality ofly to make it have ductile hole.

Figure 17 B is the floor map of a kind of cross section top sheet materials of can reversibility shrinking.

The perspective view of the decomposition of situation assembles in Figure 18 has the absorbent cores of slit for expression extensile sanitary towel.

Figure 18 A is a kind of plane graph that is coated onto the preferred sticker pattern of sanitary napkin topsheet downside shown in Figure 18 of signal.

Figure 19 is positioned at the middle part rather than at the plane graph of the absorbent cores slit of end.

Figure 20 is the plane graph that has the absorbent cores in diamond hole.

Figure 21-23 is respectively one and crooked core is housed and the thick sanitary towel of a shaped profile is arranged along the top view of 22-22 line and 23-23 line, sectional view and the profilograph simplified.

Figure 23 A and 23B are respectively a kind of top view and schematic cross-section of the sanitary towel that is made up of some tensile parts and some not extending parts.

The serve as reasons schematic cross-section of the another kind of sanitary towel that some tensile parts and some not extending parts form of Figure 23 C.

The specific embodiment,

1. the overall characteristic of absorbent.

The overall characteristic of absorber of the present invention at first is discussed.

Fig. 1-3 shows a preferred embodiment of disposable adsorption object of the present invention.The present invention relates to absorbing articles, such as sanitary towel.More particularly, the present invention relates to extensile (particularly longitudinally) thin sanitary towel.

" absorbing articles " speech is meant the article that can absorb and preserve the human body effluent herein.Say that more clearly this speech is meant and touch in order to absorb or maintain the various discharge liquors that human body discharges or the article of contiguous wearer's body.Summarize sanitary towel, pantiliner and incontinence pad (or be through other article of the underwear crotch region) with " assimilate " speech.

" disposable " speech refers to plan to use once promptly abandon, and preferably reclaims, becomes compost certainly or reclaim in the mode compatible with environmental conservation.That is to say, do not plan again they to be washed or preserve in addition again and reuse again.In the preferred embodiment of being given, absorbing articles is with 20 sanitary towels that represent.

" sanitary towel " speech confession under directions woman herein is through near the article of pudendum, is used to absorb and maintain the various ejections (as blood, menstruation and urine) that health is discharged.But the present invention is not limited only to the absorbing articles of particular type shown in the accompanying drawing or configuration.

There are two faces in sanitary towel 20, and promptly liquid a face (perhaps claiming " medial face " 20A) and a liquid permeable and Body contact can not be through the face 20B towards underwear.Sanitary towel 20 shown in Fig. 1 is observed from its direction towards health face 20A.Health face 20A will paste wearer's health when wearing.Sanitary towel 20 is in the back side towards underwear face 20B (as shown in Figure 2), and this face is pressed close to wearer's underwear when wearing sanitary towel 20.

There are two centrages in sanitary towel 20, i.e. a longitudinal centre line L and a transverse centerline." vertically " speech refers to a line in sanitary towel 20 planes herein, axle or direction, the same vertical plane of this direction are calibrated (the promptly approximate vertical plane that is parallel to) this plane mutually and roughly a wearer who stands who wears sanitary towel 20 are divided into health left side and right-hand part." horizontal " or " level " can exchange herein, refers to be positioned at the plane of sanitary towel 20, and basically with a vertical vertical line, axle or direction.

Fig. 1 also shows, it is horizontal or be referred to as end margin (or be referred to as " end ") 24 that sanitary towel 20 also has that two longitudinal edges that separate 22 and two separate, and these edges have constituted the periphery 26 of sanitary towel 20 together.When using sanitary towel 20, one in the end margin 24 towards the place ahead of user, and another in the end margin 24 is towards the rear of user.That end margin 24 towards user the place ahead is called 24A, and that end margin towards the user rear is called 24B.

There are two petiolareas in sanitary towel, is called first petiolarea 28 and second petiolarea 30.Center 32 is between petiolarea 28 and 30.32 edge stretches out petiolarea 28 and 30 from the center, and elongation is about 1/8 to 1/3 of sanitary towel's length.Authorized in 1st in the United States Patent (USP) 4690680 of Higgins JIUYUE in 1987 detailed narration has been done in center 32 and two petiolareas 28 and 30.

Sanitary towel also has one to be oriented to longitudinal center district 34 longitudinally, at least a portion length of its seat longitudinal centre line L, and also has a vertical lateral areas 36 that is positioned at the lateral outer side in longitudinal center district 34.

The thickness of sanitary towel 20 can be selected arbitrarily, and it can be quite thick, also can quite approach even very thin.The embodiment of the sanitary towel 20 shown in Fig. 1 in the accompanying drawing-3 is the examples as a sanitary towel (preferably as " ultrathin type " sanitary towel) that approaches.But be understood that when seeing these figure, the number of plies of material shown in the figure makes sanitary towel 20 look much thicker than itself.The thickness of " ultrafine " sanitary towel 20 is preferably less than about 3mm.Thin sanitary towel 20 shown in the figure is preferably flexible, thereby user is felt comfortably cool.

Fig. 2 shows each building block of sanitary towel.Sanitary towel 20 of the present invention is made of at least four critical pieces usually, comprise that a top flat that sees through liquid 38, one do not see through 40, one absorbent cores 42 of the egative film of liquid (or claim " barrier layer ") and one and be used for sanitary towel is connected to fastener 44 on the user underwear.Absorbent cores 42 is between top flat 38 and egative film 40.

Sanitary towel 20 of the present invention can also have other building block of any available use.These optional features can include, but is not limited to one or more siphon layers 46 (such as the collecting layer shown in Fig. 6 or " second top layer "), an optional liner 48 (Fig. 6 and 7), limit tongue 52 (Fig. 5) and the cover plate that can take off or release liner 50 (Fig. 2).Siphon layer 46 can be between top layer 38 and absorbent cores 42.Shown in Fig. 6 and 7, optional liner 48 is between absorbent cores 42 and bottom 40.The limit tongue or " wing " 52 turn down around the crotch region of wearer's underwear.Wearer's underwear or underwear are the U type in the accompanying drawings.When fastener 44 is sticker part, can cover these fasteners with release liner 50.So just avoided on the surface beyond sticker part before the use sanitary towel 20 is bonded at the underwear crotch region.

Fig. 4 shows the extending characteristic of sanitary towel 20." tensile " speech is meant on article at least one yardstick in the x-y plane herein can be increased.The x-y plane is meant and is arranged essentially parallel to plane positive in the sanitary towel 20." tensile " but a speech comprises those extensile and (below will further limit) article elastic stretch.Sanitary towel 20 shown in Fig. 4 is preferably all extending along length and width.But, sanitary towel 20 can be only along a direction elongation in these directions in other embodiments.Preferably sanitary towel 20 can prolong longitudinal tensile strain at least.

In some preferred embodiments, sanitary towel 20 can also stretch except extending.Described article remained tensile when " extensible " speech referred to again stretching, extension be caused certain resistance herein after stretching force acts on absorbing articles.

Preferablely be that sanitary towel 20 can elastic stretch, " but elastic stretch " and " but elastic elongation " same meaning.Fig. 4 for example understands their meaning.These speech are with representing herein that when removing the stretching force of usefulness " F " expression sanitary towel tends to get back to the yardstick (getting back to " initial " yardstick in other words) Lu and the Wu that do not stretch in other words that it does not extend.But, sanitary towel 20 needn't get back on its yardstick that does not stretch fully.As shown in Figure 4, it may only turn back to (or stretched dimensions) yardstick Ls of its yardstick that does not stretch and elongation and the loose yardstick between the Ws (such as L _RAnd W _R) on.

But make sanitary towel's elastic stretch will help to reduce and do not wish vertical contraction (vertically gathering) that sanitary towel occurs when making the power that sanitary towel tends to stretch when removing.This point particular importance that when wearer's underwear shrinks, seems.

2. the percentage elongation of the preferred embodiment of sanitary towel

A. introduce

Sanitary towel 20 can be made into many different concrete structure shapes.

For ease of discussing, can be divided into four classes to these concrete sanitary towels substantially at least.The first kind is that the used power of sanitary towel's elongation that makes is discussed.The first kind can be divided into two groups again: (a) elongation depends on the sanitary towel of user action, and (b) this two classes sanitary towel of sanitary towel of elongation those important power effects of only depending in use to be run into all within the scope of the invention.

Second class is according to for making sanitary towel extend whether a considerable amount of power of needs are divided.The second class sanitary towel can be divided into again: (a) sanitary towel that could extend of the sizable power of needs; And power that (b) only need be very little is with regard to tensile sanitary towel.This two classes sanitary towel also within the scope of the invention.

Which parts that the 3rd class relates to sanitary towel can extend.The 3rd class sanitary towel can be divided into two basic groups again: (a) all tensile sanitary towel of all building blocks; (b) sanitary towel that together constitutes by some tensile building blocks and some not extending building blocks.It is extending and top flat and absorbent cores are not extending that the example of the second group sanitary towel includes, but is not limited to the egative film of (i) sanitary towel; (ii) the top flat of sanitary towel and egative film are all extending, and have constituted a tensile sack, have encased not extending absorbent cores.

The 4th class sanitary towel relates to be tensile basically or to be not extending sanitary towel substantially, (but is connected with the extendible member of some types.) the 4th class can be divided into two groups at least: the sanitary towel that (a) has extending building block; (b) couple together by extendible member and the sanitary towel that can extend with some type.Second group for example can be that those have tensile attachment sanitary towel.Equally, this sanitary towel of two types is also all at this

In the scope of invention.

The content of the theme of these classes may comprise the content that other class covered.Other class and group also have this situation.To narrate comprehensive elongation characteristics below.But, be understood that comprehensive elongation characteristics often depends on which group described sanitary towel belongs to.

B. elongation property

(1) elongation

Sanitary towel 20 preferably can be stretched to its not extended length (with not extending width) about 110% to about 150%.The elongation that is sanitary towel is preferably between about 10% or 15% to 50%.Preferablely be, sanitary towel 20 can be stretched to its not extended length (and width) about 120% to about 140%.In different embodiment, the elongation of sanitary towel 20 (or its part) may be also big or also littler than above-mentioned value.

Elongation extensible amount best and the user underwear adapts.Promptly use the elongation of sanitary towel 20 preferably identical with the span of user underwear.Have been found that 20% span can be adapted to consider the maximum extension amount of user underwear that body kinematics causes.

Compiled in the form of Fig. 8 make the required power of sanitary towel elongation and with other relevant parameters of elongation of some preferred embodiments of sanitary towel 20.Power in the table 1 and other parameter (as mentioned above) obtain from several preferred embodiment of sanitary towel.

Certainly, those absorbing articles of dropping on beyond the described scope of table 1 of parameter in some cases also may be in scope of the present invention.In addition, be understood that: all ultimate values defined herein and scope comprise all that narrower ultimate value and scope within the ultimate value of above-mentioned qualification and scope.If such as institute's restricted portion is between about 125% to about 150%; all narrower scopes (such as between about 130-140% and between about 130%-150% etc.) within protection domain of the presently claimed invention, also are like this even these ultimate values and scope are not listed separately all.These force measurements carry out according to this description the 5th part described " method of testing ".

This heading has provided the size that makes sanitary towel extend longitudinally required power earlier.Sanitary towel causes when user moves preferably that its underwear stretches and moves under the effect of spontaneous power and produces elongation.This will make sanitary towel stretch with the underwear of user.The size of these power of numeric representation in the table.

The percentage ratio of longitudinal tensile strain amount recited above (and other measured value in the table 1) is that the longitudinal centre line L along sanitary towel 20 records.But, the elongation of some part of sanitary towel 20 may bigger than the part that is positioned at longitudinal centre line L in the sanitary towel (perhaps forming a power barrier) after bigger elongation.

Fig. 8 A shows, longitudinally that part of elongation at edge 22 can be than being positioned at that part of bigger on the longitudinal centre line L in the sanitary towel 20.In the present embodiment, sanitary towel is attached in the user underwear near on the elastic cord of shank, particularly near the elastic cord the angular region 27 tightly towards the underwear fastener 44 on that side of underwear.When the span of user underwear leg elastic when being positioned at the span of underwear appropriate section below sanitary towel's longitudinal centre line, the bigger situation of above-mentioned elongation will appear.

Fig. 8 A shows, longitudinally that part of sanitary towel elongated distance " C " of centre line L.Sanitary towel 20 is that part of one section bigger distance " D " of having extended at edge 22 longitudinally.Sanitary towel 20 longitudinally these parts at edge 22 can be stretched to its not extended length 175% to 200%.

Form among Fig. 8 shows that sanitary towel can also the elongation of (or as another kind of mode) broad ways.In addition, Fig. 8 also shows: can have an elasticity " barrier " (or " power barrier ") in the sanitary towel thus on a certain specified point, make sanitary towel along length/or width further the required power of elongation sharply increase.Below these parameters will be discussed at length.

Those parts that can reach the sanitary towel of described elongation preferably contain some absorbing material.The liquid maintenance dose of absorbing material preferably can reach 0.05g/cm at least ²This amount is to measure by following method: absorbing material is immersed in the distilled water, sample is taken out from water again, and make the sample drip-dry reach for 30 seconds.This absorbing material can be used as the material of absorbent cores.The absorbing material that can extend preferably is made of the top flat absorbing material more than one deck.

An example that does not contain among the embodiment of the absorbing material that can extend is: top flat and egative film can extend (but can not absorb liquid), but not tensible of absorbent cores.Because tensile ingredient does not comprise absorbing material, so such an embodiment is not to be preferred.But, such structure still can provide the additional areas of a little for covering the user underwear when elongation.

(2) extending force

That group digitized representation on the 2nd hurdle makes sanitary towel longitudinally extend the size of required power in the table 1.This group numeral is to record sanitary towel being extended reach under 25% to 40% the situation.

The 25% o'clock required power that sanitary towel's elongation reaches its length at least should be less than or equal to about 800g, preferably is less than or equal to about 400g, the most preferably is less than or equal to about 300g.

But the elongation of sanitary towel reaches about the stressed value of its length at 40% o'clock for being less than or equal to about 1250g.The elongation of sanitary towel more preferably is less than or equal to 800g for about 40% o'clock suffered power of its length.The elongation of sanitary towel is to be less than or equal to about 600g for about 40% o'clock the most desirable (though not limiting in table 1) of suffered power of its length.

The size of required power when listed that group numeral stretches sanitary towel's broad ways in the third column in the table (result who is done experiment according to the wide strip sample of the following employing 2.54cm that will narrate).Should read this table according to understanding longitudinally extending explanation.

Sanitary towel 20 can be only along length or width elongation.Sanitary towel needn't be not only longitudinally but also the broad ways elongation.

Also have the embodiment of some sanitary towels of the present invention not drop in the scope in the table.But the embodiment of these sanitary towels still may drop within the category of the present invention, even their parameter has some to exceed listed range of parameter values in the table.

(3) the required minimum force of elongation

Required minimum force when making sanitary towel be stretched to any remarkable length (as 5% or be preferably 10%) for one will have a suitable value, thereby make user be easy to handle sanitary towel.User is difficult to handle the low excessively sanitary towel's (such sanitary towel stretches too easily) of elastic modelling quantity.User is difficult to handle and such sanitary towel is positioned in the underwear, and it becomes and " is clamminess " as taffy.

Preferably make sanitary towel extend about 25% o'clock needed power and be at least about 50 grams, making sanitary towel extend about 40% o'clock needed power is about 100 grams.In embodiment more preferably, making sanitary towel extend about 25% o'clock required power is about 100 grams.

(4) power barrier

The load-deformation curve of sanitary towel's 20 vertical or horizontal extensions is preferably similar with curve shown in Figure 9.

Sanitary towel preferably can more easily reach the elongation of an expectation, can form a power barrier then, and this power barrier can prevent that sanitary towel's suffered power when normally using and taking off from causing that sanitary towel further extends.

Be not among all embodiment sanitary towel all need a power barrier.In addition, in the embodiment of strong barrier, the effect of power barrier only limits to avoid the length of sanitary towel and width further to increase.

Usually, the more important thing is the further power barrier that increases of length that will provide can prevent sanitary towel.This is because sanitary towel may be maximum along the suffered stretching force of its length direction.

Sanitary towel is the process of taking off from the user underwear, and the effect of the stretching force that it vertically is subjected to is bigger.The power barrier can prevent that excessive stretching, extension from appearring in sanitary towel the process of taking off from the user underwear.In addition, because the length of sanitary towel is greater than its width, so just can there be a power barrier in sanitary towel than horizontal bigger also hope at span longitudinally like this.

Such power barrier can include, but is not limited to the intrinsic power barrier of the material that adopts in sanitary towel's building block, and owing to the structure of sanitary towel forms the power barrier, in described structure, place " stop " on the mechanical meaning sanitary towel to be stretched to beyond the specified point to prevent it.

First type of power barrier can exist in the thin film of a for example hypothesis, and this film approaches may produce a power barrier when being stretched over a certain ultimate value.For example this thin film reaches certain in stretching, extension and may extend about 10% (be its initial length 110%) before a bit, and described that feature is: when the thin film elongation reaches the state of this point, not can not further extend by the effect of significant forces.But common situation is, if thin film is not according to such elongation described herein, thin film have to be subjected to surpassing for reaching the effect of this initial elongation of 10% in those power of this defined so.

Figure 10 shows the example of a mechanics " stop " 54.Described a tensile building block 56 in this sketch map.Extensible member 56 (as an indefiniteness example) is made of a tensile absorbent cores, a tensile egative film.Post on the extensible member 56 one both can be not extending also can be the very little buffer element of elongation 58.Because with buffer element 58, just for sanitary napkin topsheet provides loose or soft material, it can make absorbent cores or egative film when being stretched to a length-specific only otherwise be subjected to a sizable power effect, just can further not extend.

Figure 11 shows an example that can make the laminar structure of the sanitary towel that is formed with stop or power barrier in the sanitary towel.Shown example can be an egative film.Egative film 40 can be to stretch the laminated product that adjustment means constituted (such as an extensile adhesive film 60 being laminated on the polyethylene film 62 after giving stretching, extension) by one.When the film 62 after giving stretching, extension is loose, two retes are pressed onto together.When egative film 40 is stretching, be easy to make film 60 to extend to polyethylene film 62 and give that length that stretched, but afterwards as not then can further not stretch by effect quite energetically.

The laminated construction that is used to make sanitary towel form stop or power barrier there is no need along bonding on the whole interface between each parts of lamination.

Such as, laminatedly can constitute by a kind of material (as a kind of elastica and a kind of absorbing material) of stretching of giving.Can be attached to absorbing material by spells and be in giving on the stretching, extension film under the state of stretching.Can be at many lines, a plurality of speckles or other locate mode are bonded together two building blocks.Can these building blocks be combined with the associated methods of glue, hot press or any other suitable type.

These last laminated goods that form can form some rugae areas under relaxed state.It can stretch or multi-direction stretching, extension to stretching, extension, twocouese by folk prescription.Laminated can extend to elastica that give the size that stretched.But as be not subjected to act on quite energetically then and can further do not extend, that makes like this laminatedly can be used as a combinative structure, is used on one or more building blocks of sanitary towel.

(5) amount of recovery (or set rate)

The recovery rate of sanitary towel can be different different because of embodiment.Be stretched under 125% to 140% the situation of its initial length, after removing the elongation load, sanitary towel needn't be back on its initial length.But, can return back to as sanitary towel and to be less than 110% of its initial length, then will be desirable, and it will be replied along with the motion of the loose of underwear material and/or user health when sanitary towel extends like this, and can be not pleating.Show in the table 1 that in not good enough embodiment, when removing when load elongation, sanitary towel may only be returned to and be less than or equal 125% of its initial length.

(6) regeneration rate

If sanitary towel has the ability that returns to the size that does not stretch, it preferably has lower regeneration rate.Expect to have low regeneration rate several reasons arranged:

After stretching, sanitary towel when lentamente towards size restoration that it does not stretch, will little by little touch the health of user.Sanitary towel can lightly, cosily touch the health of user under the effect of the power of the size restoration that does not extend towards it.Also contain some zones in the sanitary towel and can not be returned to its initial size owing to its material generation plastic deformation.These zones also have the applying that helps with health.Therefore, sanitary towel is just in time opposite with the material (as LYCRA) with the elastic property commonly used that is tending towards basically shrinking.

From consumer this point being taken off from underwear in sanitary towel considers not wish that also the regeneration rate of sanitary towel is too fast.User often is very fast after using sanitary towel it to be torn it down from the underwear crotch region, if recovery rate speed is too high, in removing the process of sanitary towel, sanitary towel may be easy to bullet to user (promptly as rubber band) when sanitary towel's elongation radially more than or equal to about 20% the time, this point of control regeneration rate particular importance that seems.

But, length or width after regeneration rate should be high enough to make sanitary towel's (be shorter than or equal 5 seconds) in several seconds to return it to recover.

The length that sanitary towel turns back to it after recovering or the speed of width are preferably in about 1.3cm//s (about 0.5 inch/second) extremely between about 5cm/s (about 2 inch/seconds).

3. each independent building block of sanitary towel

With reference to figure 1-3, can more clearly understand each building block of the various embodiment that are applicable to sanitary towel 20 of the present invention.

A. top flat

(1) general performance of preferred top sheet materials

Top flat 38 is made of permeable first parts of liquid.When using sanitary towel 20, top flat 38 is close on the skin of user.Top flat 38 is preferably submissive, soft feel, and preferably as far as possible user skin is not stimulated.Top flat 38 also should have the performance of well wearing permeability and reducing rewetting, and it can make the interior Excreta rapid permeability of body cross and flow to absorbent cores 42, but does not allow these Excretas to flow back on the skin of user by top layer 38.

Two sides (or title face or claim surface) are arranged on the top flat 38, comprise towards a side 38A of human body and towards a side (perhaps being a the side) 38B of underwear towards absorbent cores.Top flat 38 constitutes in the sanitary towel 20 a part with the contacted surface of human body (" surface ") 20A usually at least towards a side 38A of human body.Top flat 38 has two longitudinal edge 38C and two end margin 38D.

Other building block of sanitary towel can be described with similar label system.That is to say, represent with the numbering and the letter " A " of this building block towards that side of user health in a certain building block.That side towards the user underwear is represented with the numbering of this building block with letter " B ".Lateral edge and end margin use the numbering of building block and letter " C ", " D " to represent respectively.

The top flat 38 that is fit to can be made by the very wide various materials of scope, and these materials include, but is not limited to textile material and non-woven material, porous formed thermoplastic film, plastic film, wet-formed thin film, perforated foams, reticulated foam, weblike heat plastic films and thermoplasticity woven scrim.

Weaving that is suitable for and non-woven material by natural fiber (as the wood fiber or cotton fiber) synthetic fibers or modification natural fiber (as polymer fiber, such as polyester, polypropylene fibre and polyethylene or polyvinyl alcohol, starch-based resin, polyurethane, cellulose esters, nylon and rayon fiber) or combine by natural fiber and staple fibre.

When top flat 38 comprised a kind of nonwoven sheet, described material piece can be used the spunbond method, and the method for combing method, wet-laying, molten blowing method, hydraulic pressure entanglement method, said method combination etc. is made.

Usually make preferred top flat 38 with porous membrane, because they can make liquid see through, and if the hole processes to such an extent that suitably can also reduce liquid return, thereby reduced the probability of the user skin of getting wet again.The porous membrane that is suitable for can be made with any material defined in the publication of description thin film of being quoted here and preparation film process.

Narrated the thin film that is suitable in the following patent: Decembers in 1975 were authorized the US 3929135 of Thompson on the 30th, authorize people's such as Mullane US 4324426 April 13 nineteen eighty-two, the US that authorizes people such as Radel August 3 nineteen eighty-two authorized people's such as Ahr US 4463045 and the US 5006394 that authorized Baird on April 9th, 1991 on July 31st, 4342314,1984.Narrated in the following patent other that be shaped with suitable thin film hydroforming: the US4609518 that authorizes people such as Curro, US 4629643, US 4695422, and US 4772444, US4778644 and US4839216 and the US4637819 that authorizes people such as Ouelletle.

Narrated the material that other is applicable to top flat in the following patent: the US4775579 that authorized people such as Hagy on October 4th, 1988, authorized the US4798604 of Carter on January 17th, 1989, on June 11st, 1991 was authorized the US5023124 of Kobayashi, and the people's such as Suda that published on March 1st, 1989 European patent application EP 0304617 A2.

In the different embodiment of other, can prepare the thin film described in other document with the material described in more above-cited files (such as the extensile polymeric material described in the U.S. Pat 4798604 of authorizing Carter).The plastic foil that can be used for preparing the three-dimensional grand existing elongation that has not shinny basically surface described in the US4463045 such as the extensible polymeric material described in the US4798604.

In another embodiment shown in Figure 12, the member that top flat 38 can be made up of non-woven material or fabric 64 and a kind of for example three-dimensional porous plastic foil 66.Non-woven material decreases the plastic sense of top flat, thereby becomes more comfortable.

In a preferred embodiment embodiment illustrated in fig. 12, the pivot weight of non-woven material 64 can be about 1-40g/m ², be preferably about 8-12g/m ²A kind of preferred non-woven material is made of a kind of thermal point bond polypropylene foil of combing.Some preferred nonwoven fibrous webs can be that the Fiherweb Group company of South Carolina Simpsonville produces, and trade mark is the product of CELESTRA and HOLMESTRA.

This plastic foil 66 is a kind of thermoplastics with capillary tube 39 of a large amount of similar tapers, has described capillary size, structure and the orientation of this material in authorizing the US3939135 of Thompson.This thin film needs a kind of surfactant (ATMER645 that I C I SpecialtyChlmicals produces) to handle.Preferably surfactant is joined in the vistanex granule of forming thin film.

Can use a kind of vacuum lamination process, by adhesive-bonded fabric than the mode in the thermoplastic film of imbedding under the molten condition, adhesive-bonded fabric 64 and porous plastic film 66 are formed a whole composite construction as shown in figure 12.On January 9th, 1991 was narrated such top flat in the U.S. Patent application 07/794745 by people such as Aziz proposition in more detail.In an alternative embodiment, can place adhesive-bonded fabric and thin film Face to face, in those embodiment of back, these two building blocks are connected to each other.The usability methods that these two building blocks are connected includes, but is not limited to Method for bonding, fusion method (comprising thermally coupled and/or pressure connection method), ultrasonic method and dynamic power machine connection method.

Figure 13 shows other embodiment, and wherein top flat 38 can have the film of fiber to constitute by an entanglement." entanglement has the film of fiber " speech is meant that one includes the perforated membrane of fiber, and wherein fiber tangles in the hole of thin film and tangles on every side in these holes.

The perforated membrane 68 of such top flat can described from here any thin film or bare cloth formation.Disclose a kind of perforated membrane 68 that is specially adapted to a kind of like this top flat among the US4463045, and this film encircled ingot rolls so that it has extensibility to a certain degree.Can encircle ingot to film 68 before or after tangling rolls.

Can be with Mechanical Method or heated mechanical processing method perforated membrane 68 and non-woven fibre 70 loosely mats.Fiber 70 is tangled towards health one side 38A or towards the direction of absorbent core layer one side 38B along (or from).

Can adopt any suitable technology, fiber 70 and film 68 be tangled with Mechanical Method or heated mechanical method.Such as, can moltenly blow to fiber 70 on the film, centrifugally bond on the film, combing is intertwined or melts to film, with heated mechanical method and the film of clogging short fiber and blow on the plastic foil that still is in molten state, perhaps be intertwined with hydraulic method with film.Authorize in people's such as Buntin the U.S. Pat 3978185 of Exxon company and disclose a kind of suitable molten blow moulding.

Fiber 70 can be hydrophilic also can be hydrophobic, but the hydrophilic fibers that is suitable for can be made by inherent wet fiber (as the nylon copolymer that is made of a kind of nylon component and a kind of hydrophilic component).A kind of material like this can have been bought from Allied Signal Inc, and commodity are called Hydrofil SCFX.

In a preferred embodiment, fiber 70 is a kind of thermoplastic synthetic fibers.The ASPUN that the polyethylene fibre that is suitable for can select for use Dow chemical company to produce, and polypropylene fibre can be selected the commodity of Exxon company ESCORENE 3400 by name and 3500 series of products for use.

After having prepared the membrane structure of fibre matting, preferably come membrane structure is handled so that its possess hydrophilic property with any known method immediately.The hole 39 that this technology will make film is treat liquid better.After these treatment process, can encircle ingot to composite construction and roll.

The material of the top flat 38 of fibre matting makes the contact between perforated membrane 68 and the non-woven fibre 70 tightr.This will bring and improve the advantage that liquid passes film 68 arrival fibers 70 and following each layer conveying capacity.Arrange towards health one side 38A along top flat 38 as fruit fiber, can also improve comfortableness.Among can the slit of shift-in user health because film 68 parts of top flat 38 are difficult for and following entangled fiber 70 separates, so as fruit fiber arrange further its comfortableness of raising along that side 38B of top flat 38 towards absorbent core layer.

(2) make top flat have alternative mode of extensibility

Can make above-mentioned top sheet materials have extensibility in several ways.These modes are not limited to following several.

A kind of mode for preparing tensile top flat 38 is to carry out one-time mechanical operation (rolling as pleating, wrinkling or ring ingot) on the top sheet materials so that form openable fold when top flat stretches in top flat.This technology can be carried out on above-mentioned a variety of top sheet materials.

In a preferred embodiment of the invention, after top flat 38 is made by the method in the U.S. Pat 4463045, roll through the ring ingot again, so that it has longitudinal extension to a certain degree.

Narrated a kind of like this top flat in the patent application that on July 23rd, 1 submitted to, people's such as Thompson U.S. Patent application 07/734404, people's such as people's such as Thompson U.S. Patent application 07/734292 and Buenger U.S. Patent application 07/734405.Can be these patent applications together as the reference of " capillary channel fiber " aspect.

Narrated in the following document and be used to encircle that ingot rolls or the suitable technology of " giving wrinkling ": authorized the U.S. Pat 4107364 of Sisson on August 15th, 1978, the US4834741 of the Sabee of approval on May 30th, 1989, and await the reply jointly, common three U.S. Patent applications transferring the possession of be people such as Gerald on February 28th, 1991 submit to 07/662536, people such as Kenneth B.Buell on February 28th, 1991 submit to 07/662537, people such as Gerald M.Weber on February 28th, 1991 submit to 07/662543.The reference paper of these patent applications conduct together " the ring ingot rolls " aspect.

The orientation that the ring ingot rolls the fold line in the corrugation structure of top flat is along laterally, so that make the top flat can be at longitudinal extension.In other embodiments, the orientation of fold line also can be longitudinally, both direction and/or other direction.The prolonging direction of top flat 38 is vertical with the direction of fold line.

Figure 14 shows that in other embodiments, top flat 38 can be made of a kind of non-woven material, contains fiber 78 in this non-woven material, and the orientation of fiber 78 is general vertical with the direction of desired stretching, extension.Can be roughly horizontal fiber by orientation as top flat and constitute, thereby it can longitudinally be extended.

Figure 15 shows an alternative top flat embodiment.In Figure 15, the fused portion 72 discrete with each shown in Fig. 5 is attached to top flat 38 on the following collecting layer 46.In the embodiment shown in fig. 15, collecting layer 46 just produced before being fused on the top flat 38 and stretches.So top flat 38 and collecting layer 46 have constituted a lamination.When the lamination after stretching is in loose attitude, between a plurality of fused portions 72, form a plurality of bunches of shape zones 74 in the lamination, and formed a plurality of valley point district 76 at the place, fusion area.

Embodiment described in Figure 15 has a very important advantage.This embodiment (and multiple alternative embodiment) allows with it seems that usually inextensible material makes extensile lamination.As it has been generally acknowledged that porous plastic film top flat 38 is exactly inextensible.But, if a top flat 38 being fixed on one deck for example on the collecting layer 46, make the material of these two building blocks be in loose attitude after the elongation on the collecting layer 46, top flat 38 has just possessed extensibility to a certain degree.

Bunch shape zone 74 in the lamination also has some specific advantages like this.Bunch shape zone is normally softish.They will make the absorption fiber of collecting layer 46 more press close to the health of user than the adhesion area of non-bunch of shape.Such structure also can improve absorbability (particularly bunch shape zone 74).

In other alternative embodiment, top flat 38 and collecting layer 46 the two in fusion for all extensible before the one.

In other embodiments, top flat 38 can be with tensile (perhaps preferably extensile) material, so that it has extensibility.As top flat 38 can with the porous membrane (for example can be the Exx-7 Exxon thin film of having bought from Exxon company) that polyethylene/the Kraton mixture is made, just obtain a kind of without any mechanical treatment with regard to extensile material.

In other embodiments, top sheet materials can comprise that the lower non-woven material of those pivot weights (is that pivot weight is about 18-25g/m ²Non-woven material).For example, so a kind of non-woven material can be the P-8 product that Veratec company (it is the branch company of Massachusetts Walpole International Paper Company for Veratec, Inc) produces.

In other embodiments, top flat can be made of the non-woven material that heat treated intensive fiber or hydraulic pressure tangle.

Figure 16 shows that in other embodiment, top flat 38 can elastic structural member.An example of this structure is a net, sieve or the scrim 80 that is made of elastic rib 82.December in 1977 was authorized an example that discloses a kind of like this structure in the U.S. Pat 4062995 of Korpman on the 13rd.Square or diamondoid hole 84 is arranged between each rib in the net.Such structure is generally all extensible in all directions.Can be added to elasticity or stiff fiber 86 in the net or bond to online.

In the alternative embodiment of other, can make a kind of structure that can stretch along all directions to top flat 38 with the material that only can stretch along direction.

An example that can be used for a kind of technology of this purpose shown in Figure 17.The left side of Figure 17 shows a kind of traditional handicraft, can be used for the net 88 of an extensible materials is cut into several top flats that separate 38.Net 88 is along direction (MD) motion of processing.This direction also is the direction of extension of net 88.

The right side of Figure 17 shows a kind of by (perhaps having one with machine direction from an angle

" deflection " angle) mode of cutting extensible materials net make a kind of can be along the technology of the top flat of multi-direction stretching, extension.In a modification of this technology, can make net send into machine at an angle also along cutting with the equidirectional shown in traditional technology.Resulting cutting top flat 38 can be along stretching near the both direction shown in the arrow of cutting top flat.

Figure 17 A shows in other alternative embodiment, a plurality of holes 39 are arranged on the perforated membrane top flat 38, and the geometric arrangement in hole 39 helps to make top flat 38 to stretch along specific direction.

In other some embodiment, can on top flat 38, be cut into slit so that absorbent cores has following elongation characteristics.

In other embodiment (as shown in Figure 17 B), top flat 38 can be made of a kind of reversible expanded material.Reversible expanded material material that generally width increases (rather than reducing) when longitudinally extending constitutes.Such material is applicable to sanitary towel because when above-mentioned material stretches, these materials topped in the user ability in the crotch district do not reduce, in fact can increase topped ability in the fork district on the contrary.As shown in Figure 17 B,, can make the structure that when stretching, plays the tongue effect of similar limit of sanitary towel of these materials if the increase of this width is enough big.

Authorize October 23 nineteen ninety and narrated a kind of can reverse a kind of suitable method of material of constriction of making in the U.S. Pat 4965122 of Morman.

(3) additional step

Except foregoing, in the preferred embodiment of the invention, be a part 38 of handling top flat at least with surfactant.This can finish by any routine techniques well-known to those skilled in the art.

All narrated the method that is suitable for of handling top flat 38 with surfactant in a lot of piece of writing documents, these documents comprise the U.S. Pat 4950264 and 5009653 of authorizing Osborn, and by the U.S. Patent application 07/794745 of people such as Aziz in application on November 19th, 1991.Back one piece of patent application has pointed out how to handle with a kind of surfactant a kind of perforated membrane parts of formed film top flat of non-woven material/porous thermoplastic.Preferably surfactant is mixed in the used resin of thermoplastic forming thin film into.

Handling top flat 38 with surfactant makes top flat 38 more hydrophilic.Can make flowing fluid ratio pass undressed surface like this and see through top layer 38 quickly.So just reduced body fluid and overflowed the possibility of top flat 38, thereby prevented the probability of discharging by top flat 38.

In addition, in a preferred embodiment, the inner surface 38B of top flat 38 closely contacts with following absorbed layer and combines.This contact relation is not passed flowing fluid ratio and is penetrated top flat 38 better with the contacted top flat of absorption portion.Yet, be not that the surface of top flat 38 and the surface of following absorbed layer are bonded together.

The mode that top flat 38 and following absorption piece are kept in touch has: top flat and below building block between applying adhesive, the fiber of surface layer is tangled mutually with top layer, with many discrete separately fusion parts top flat 38 is fused on the following absorbed layer, perhaps uses the known any other method of those skilled in the art.

Fig. 5 and Fig. 7 show a kind of fusion part that can form the preferred type of fusion area, and described fusion area has constituted to have for liquid and sees through and the structure of the required apocenosis passage of absorbing material below arriving.Narrate these in more detail in the U.S. Patent application 07/810774 by people such as Cree submission on 17th at December in 1991 and preferably fused part.

B. absorbent cores

(1) fundamental characteristics of preferred absorbent core structures

Absorbent cores 42 is between top flat 38 and egative film 40.Absorbent cores 42 is parts that absorb menstruation and other body fluid.

The absorptive capacity of absorbent cores 42 needn't be far longer than the fluidic total amount that the phase of giving absorbs.Absorbent cores generally can compress, and has comfort, and the skin of user is not stimulated.It can be made of the known any material that is used for this occasion.The example of indefiniteness comprises natural material (such as being commonly referred to pulverous art slurry of airfelt chemical fibre dimension, corrugated cellulose wadding), can form the polymeric gelling agent of hydrogel, any suitable combination of the cross-linked cellulosic of modification (below will introduce in detail), capillary channel fiber, absorbent foam materials, absorption sponge, synthetic staple fibre, polymer fiber, peat moss floss or any effect identical materials and these materials.

Also can call " absorbability gel rubber material " or " superabsorbent material " to top listed polymeric gelling agent.To be exactly those will suck in these liquid and form the material of hydrogel contacting with liquid (as water or other body fluid) polymeric gelling agent.Adopt this mode, polymeric gelling agent can be collected and be maintained the liquid that enters in the absorbent cores 42, thereby makes these absorbing articles have higher absorptive capacity and/or liquid-maintaining capacity.

The polymeric gelling agent that is adopted in the absorbent cores 42 generally by a kind of water-fast basically, have the polymeric material granule 41 that a little is crosslinked, part is neutral, can form hydrogel to constitute." granule " speech used herein can refer to the granule of Any shape (as ball shape, lamellar or shape such as fibrous).

The polymeric material of the preferred type that the absorbent cores 42[that has narrated a kind of fundamental type in those patents of authorizing the U.S. Pat 5009653 of Osboyn and being quoted in more detail includes, but is not limited to here to be adopted, and the method that can be used for preparing those preferred types of these polymer beads], quote all these description as a reference at this.But, absorbent cores 42 described herein needn't comprise particles of superabsorbent material.

Described the suitable cross-linked cellulose fibres that are used for absorbent cores in the following document: Decembers in 1989 were authorized people's such as Cook U.S. Pat 4888093 on the 19th, authorized people's such as Dear US4822543 on April 18th, 1989, Decembers in 1989 were authorized people's such as Schoggen US4889595 on the 26th, authorize people's such as Moor US4898642 February 6 nineteen ninety, authorize people's such as Lash US4935022 June 19 nineteen ninety, May in 1991 people such as disclosed Herron on the 15th european patent application 0427316A2 and 0427317A2, and May in 1991 people such as disclosed Herron on the 29th european patent application 0429112A2.

Be suitable in the example that the capillary channel fiber [fiber that promptly has passage (preferably on the outer surface of fiber)] of absorbent cores provides below detailed description being arranged, these examples be documented in October 10 nineteen ninety disclosed european patent application 0391814 and the patent application of above-mentioned those relevant capillary channel fibers in.

At U.S. Patent application 07/743839,07/743950,07/743947,07/830159 (P﹠amp; G case numbers 4451,4452,4453 and 4453R) in narrated the absorbent cores that is fit to that constitutes by foam-like material.First, the third and fourth listed application is submitted to people such as Des Marais.Second listed application submitted to people such as Young.First three application was submitted on August 12nd, 1991, and the 4th application submitted on February 12nd, 1992.Introduced other absorbent cores that constitutes by foam-like material among the european patent application 0293208B1.

U.S. Pat 3512530 and 3954493 and French Patent (FRP) FR2203827 in introduced the absorbent cores that constitutes by spongy material.

Introduced other suitable absorbent cores in the following list of references: the U.S. Pat 4773903 of authorizing people such as Weismon on the 12nd respectively at JIUYUE in 1988 27 days and JIUYUE in 1989, and US4865596 with extensibility.Disclose in these patents by microfibre sheet, the staple fibre goods of non-absorbent band wrinkle, and the various composite absorbent structure that granule constituted that can form the polymeric gelling agent of hydrogel basically that tangle, blowing with a kind of hydrophilizing agent.

Other absorbent core material that is suitable for is made of the mixture of molten playing wind and stringing instruments property fiber and absorbing material.Such material is made of cotton fiber and the melt blown fiber composite after hydraulic method is tangled, and described composite is and can have bought from the Fiber web ofSimpsonville company of the South Carolina ^#The 7102-102 product.In other embodiments, can replace cotton fiber with other absorbing material (such as the 101 or 102 type FSA fibers that can buy from the Courtaulds fiber company limited of England West Midlands).Another kind of alternative plan is, two layers of material (as above-mentioned ^#The 7102-102 product) is superimposed together with a kind of granulated polymer gel in the centre, and makes it have extensibility, thereby prepare a kind of tensile lamination of high absorption.

In addition, absorbent cores 42 can describedly from here be suitable for use as a lot of materials formations of top flat.But, for the purpose of practicality, these materials must be absorbable or use with some absorbing materials.Can be adhered in the bare cloth absorbing fiber by a kind of and the similar structure of elasticity bare cloth shown in Figure 16 such as, absorbent cores 42.

(2) make absorbent cores have extensibility

The present invention has a lot of tensile absorbent cores embodiment that are suitable for.They include, but is not limited to following embodiment.Also can combine the parts of following embodiment in any suitable manner and constitute other embodiment.

(a) lamination

In a preferred embodiment shown in Figure 2, absorbent cores is a lamination.This lamination by the tissue layer of two air-flows weavings of super polymeric material (as being the shape of the granule 41) quantum that absorbs of one deck (be respectively first and second tissue layer or title " on " and the D score tissue layer) constitute between 43 and 47.

First and second tissue layer 43 and 47 contain super-absorbent polymer materials, and it can promote the effluent that is absorbed to pass the horizontal siphonic process of absorbent cores 42 and have the certain absorption ability.Tissue layer 43 and 47 can be accompanied the piece of cloth behind particles of superabsorbent material 41 folding and constituted by a centre, perhaps two discrete lamellas also can making for identical (or different) fabric.

The super lamination (WATER-LOCK is the trade mark of Grain Processing Corporation registration) that absorbs of the WATER-LOCK L535 that the Girain ProcessingCorporation Of Muscatine that a kind of suitable lamination is Iowa Muscatine produces.Disclose so super absorption lamination in the following patent: the U.S. Pat of authorizing people such as Peterson on August 20th, 1984 was authorized people's such as Lindsay US4260443 on April 7th, 4467012,1981 and was authorized people's such as Kramer US4578068 on March 25th, 1986.

By using elongation in that (tissue paper that stretches between can the about 120%-300% at its initial length prepares lamination absorbent cores 42, can make this absorbent cores have extensibility between the 20%-200%.Can prepare such piece of cloth with kinds of processes.In one embodiment, tissue paper can be conventional, corrugated fabric.As tissue paper can be BOUNTY fabric through a creping.

In other embodiments, preparing this kind fabric can adopt and carried out suitable improved a kind of technology to ratifying on March 4th, 1980 to technology described in the US4191609 of Trokhan, perhaps adopt technology described in the U.S. Pat 4529480 of authorizing Trokhan on July 16th, 1985 has been carried out suitable improved a kind of technology, perhaps adopt technology described in the U.S. Pat 4529480 of authorizing Trokhan on July 16th, 1985 has been carried out suitable improved a kind of technology, perhaps adopt disclosed european patent application WO92/00414 on January 9th, 1992, the technology described in WO92/00415 and the WO92/00416.In the latter case, it is tensile fabric to be become with following one or more steps: the angle of regulating scraping blade is so that can form different fold; Change paper mesh-like area performance so that its can stretch to a certain extent; Perhaps before gauze is subjected to further drying, from the Yankee heat drier, take out gauze, thereby obtain effective fold.

In the embodiment that can Gong select for use, originally there was not fold or fold fabric seldom to occur fold later at lamination yet, the technology that forms wrinkle in this case is to make laminated fabric acquire a ripple laminated fabric by the roll of two couplings, and the extending range of this fabric (can stretch between the 120%-300% at its initial length) between the 20%-200%.The ripple direction should be vertical with desirable direction of extension.

In a relevant alternative embodiment, the mode that makes lamination fold occur is: can make lamination break away from this surperficial method again and make lamination wrinkling by lamination being adhered on the surface.This can be with finishing with the similar mode of the step that shifts out paper from a Yankee exsiccator described in the above-mentioned european patent application.

In another relevant embodiment, can be at the lamination place in one plane the time, the mode of compressing into this lamination with a mould makes it wrinkling.As can with to the similar mode of mode described in the U.S. that authorizes people such as Kramen No. 4578068 patents, adopt pair of plates that a mould is compressed into lamination.

In alternative embodiment, can suitably cut or cut out slit to lamination and form a tensile absorbent core structures.Show among Figure 18 that in a specific preferred embodiment, absorbent cores 42 is laminations that help longitudinal tensile strain that cut out slit in a manner described or partly cut out slit.Figure 19 shows one in central region rather than have the other absorbent cores of slit at petiolarea.A kind of other absorbent cores of wherein cutting the diamond hole has been shown among Figure 20.Also can adopt the hole of any or multiple other suitable shapes.

On July 24th, 1991, disclosed Lion company publication number was the absorbing material that has slit of having introduced other type in the european patent application of 0293208B1.

Preferably the longitudinal edge of sanitary towel and end margin 22 and 24 seal with prevent sanitary towel when the elongation liquid or the superabsorbent material that contains liquid from sanitary towel by siphon or eject.Another kind of situation is can make the edge 42c and the 42d sealing of absorbent cores 42 rather than the edge of whole sanitary towel is sealed.Such as, can get up the edge roll of absorbent cores 42 or cover with a tissue layer.In other alternative embodiment, can or otherwise handle with the particles of superabsorbent material 41 that prevents liquid or contain liquid to be come out or eject the edge fold of this tissue layer by siphon from absorbent cores 42.All sealed-for-lives of sanitary towel's 20 peripheries are in sanitary towel's should not break when elongated (that is to say that between the operating period, any sealing all should be remained valid in sanitary towel).

In above-mentioned any lamination absorbent cores embodiment, can be with another any other known absorption material, include, but is not limited to the cross-linked cellulose fibres of peat moss floss, modification or synthetic fibers and replace cellulose fibre in one or more tissue layer.The pivot weight of each tissue layer also can be different.

(b) contain the mixture structure of absorbing material and superabsorbent material.

Absorbent cores 42 can be can't help a kind of laminated construction and be constituted, and is made of a kind of mixture of above-mentioned absorbing material and superabsorbent material.

Such as, can prepare the thin slice fabric with the mixture that the absorbing material that has airfelt chemical fibre dimension, improved cross-linked cellulose fibres, crosslinked carboxymethyl cellulose (authorize as on October 9th, 1984 Gellert US4475911 described in) peat moss floss or other absorbing material are formed.Can carry out wrinkle, joint-cutting or carry out other operation described here these thin slice fabrics then, to produce tensile absorbent cores 42.

Can distribute particles of superabsorbent material 41 with any known mode among any embodiment described here.Can be particles of superabsorbent material 41 and absorbing material uniform mixing described here.In other embodiments, can distribute particles of superabsorbent material to such an extent that the concentration in gradient of superabsorbent material in sanitary towel distributed.Realize the mode that this Concentraton gradient distributes, the people's such as Duenk that announce on October 22nd, 1986 european patent application was authorized people's such as Kellenbdrger US4699823 and authorized on April 23rd, 1991 among the US5009650 of Bernardin on October 13 in 0198683,1987 introduction.

(c) contain the structure of all kinds fibre blend.

Absorbent cores 42 can be made of with the mixture of specific superabsorbent material various types of natural or staple fibres.

(i) " mixing " absorbent cores

A kind of specific preferred absorbent cores 42 that will be called as " mixing " absorbent cores afterwards has been shown among Figure 21-23.This specific absorbent core structures has been shown in thicker sanitary towel 20.But also it can be prepared into a kind of thin layer for the product that is used for approaching.

Blended absorbent core 42 is made of one deck fiber (preferably making the homogeneous mixture of fiber).Mixed core 42 is made of at least two groups (two types) fiber.The short hydrophilic fibers that comprises the low denier of first group (or type), and by second group of (or type) fiber of the synthetic fibers formation high danier, long of about 5%-90% (preferably being about 10%).Can change the mixing ratio of two groups of fibers, to produce product with the required character of dissimilar absorbing components.Except that specializing, all percentage ratios that limited here all are percentage by weights.

First group of fiber can comprise that natural fiber is (such as cotton fiber, cellulose fibre or other natural fiber.) first group of fiber also can (or additional) also comprise synthetic fibers (such as superabsorbent material fiber, capillary pipe fiber, with the natural fiber of Mechanical Method or chemical method modification).These fibers comprise paper pulp (or title " CTMP " or " TMP "), the wood fiber or the cross-linked cellulosic of (but being not limited to) artificial silk, chemi thermo mechanical processing.In one embodiment, first group of fiber is made of airfelt chemical fibre dimension.Those fibers in first group or hydrophilic, perhaps can with any aforesaid method of hydrophilizing they handle possess hydrophilic property.

A kind ofly can maintain an incompressible essential part when the moistening by selecting for use, have the performance that quite inflexible fiber can improve product.(be that this fiber should have higher coefficient of compressibility.) preferably selected fiber wet resilience and dried resilience (promptly when being compressed they not only tend to resist compression but also be inclined to bullet be back to its original shape) can incompressiblely be arranged again.For satisfying these requirements, cross-linked cellulosic is that special recommendation is adopted.But should be pointed out that these cellulose fibres are to have passed through certain modification to handle, and can not be considered as cellulose fibre or natural fiber itself to them again.

Second group of fiber should have higher coefficient of compressibility equally, and still can keep quite high coefficient of compressibility when moistening.Second group of fiber preferably also has wet resilience and in resilience.Useful fiber include, but is not limited to by those that limit below be suitable as fiber in the collecting layer 46 the synthetic fibers that material constituted (but, two groups of fibre lengths, yarn deniers etc. needn't be all identical.To introduce parameters such as some preferred fibre lengths below.)

The fibre length of fibre length in second group in first group.Preferably, the fibre length in second group more than or equal to about 0.6cm (about 1/4 inch) and more preferably greater than or equal about 1.3cm (about 1/2 inch).The fiber denier number of fiber denier number in second group of fiber in first group of fiber.Preferably in second group every danier number of fiber between about 6-40.Preferable is that the danier number is preferably between about 15-about 25 between about 15-about 30.

Fiber in second group can be hydrophilic, hydrophobic, also can be that part is hydrophilic and part is hydrophobic.Fiber in second group preferably has a certain hydrophilic means (preferably cellulose parts) at least.Can make the fiber in second group have a hydrophilic means with several suitable methods.These methods include, but is not limited to fiber is applied or handles, so that their (or being their surface at least) possess hydrophilic properties.

The synthetic fibers that are fit to can be KODEL 200 and 400 series of products that the Eastman Kodak TextileFibers Division Kingsport of Tennessee State produces.A kind of synthetic fibers of suitable model are KODEL 410 fibers.

A kind of synthetic fibers that are particularly suitable for type that are used in second group of fiber are polyester fibers of handing over wrinkle.A kind of suitable polyester fiber is KODEL 431 fibers.When being carried out cockle, these KODEL fibers can be undertaken by the standard that 5-7 fold appears in every 2.5cm straight length (per 1 inch) approximately, preferable is about 6 fold of every 2.5cm air line distance, and about 6.3 fold of the most every 2.5cm air line distance are better.Cockle angle during the fiber cockle between about 70 °-Yue 91 ° better, for about 88 ° better.Cockle has been improved the resilience of one of desired various character of the conduct of fiber.The danier number of fiber is every single fiber 15 daniers, and fibre length is about 1.3cm (about 0.5 inch).Can on fiber, be coated with any suitable method that those skilled in the art were familiar with and be covered with a hydrophilic or hydrophobic coating.

In an alternative embodiment, may replace first group of fiber in the fiber with a kind of synthetic fibers (having water-wetted surface) very short, the low denier number.Blended absorbent core 42 is combined into second of fiber (scribbling the polyester fiber that one deck is called a kind of patented permanent wettable coating of CELWET such as those) and long, high danier number by hydrophilic first of short, low denier number and is combined into fiber and constitutes in this case.The polyester fiber that scribbles CELWET can have been bought from the HoechestCelanese company of North Carolina state Charlotte.

A kind of blended absorbent core like this can also contain the polymeric gelling agent granule that can form hydrogel, so that improve the absorptive capacity of core.

In a kind of preferred embodiment, can form the gel rubber material formation of the polymeric gelling agent of hydrogel by " absorbing at a high speed ".The gel rubber material that " absorbs at a high speed " is meant herein can be to reach about 40% of its absorptive capacity at least in 10 seconds or within 10 seconds.(reach at least about 50% better, preferably can reach about 90% at least) absorb ejection with such speed those absorb gel rubber materials.

In the U.S. Patent application 07/637090 and 07/637571 that proposes by people such as people such as Noel and Feist respectively, introduced a kind of percentile usability methods of absorptive capacity that is used for measuring.In alternative embodiment, may mix use to (or speed) the usually absorption gel rubber material that absorbs at a high speed gel rubber material and other type mutually equally.

Among the embodiment that has just introduced in the above, absorbing gel rubber material preferably makes fibrous material at a high speed.Authorize on August 8th, 1989 among people's such as Bourland the US4855179 than having introduced fibrous superabsorbent material (absorbing gel rubber material) in more detail though need not to be fibrous high speed.

" fibrous absorption gel rubber material " is to comprise fully by absorbing fibrous absorption gel rubber material that gel rubber material constitutes and scribbling the bicomponent fibre that some other material of absorbing gel rubber material constitutes by the surface at least partially.A kind of useful fiber shape absorbs the formal FIBERSORBSA7000 that produces of Arco chemical company that gel rubber material is Pennsylvania Newton Square at a high speed.The super at a high speed fiber that absorbs of other useful fiber shape is the polyacrylate based fiber that is claimed 101,102,111 or 112 type FSA fibers that Courtlauds fiber company limited is produced.

It is believed that, the polymeric gelling agent that can form hydrogel is used in such blended absorbent core can improves its effectiveness.Certainly, also may use the polymeric gelling agent that can form hydrogel of higher concentration.

Preferably blended absorbent cores 42 is compressed to density and is at least about 0.09g/cm ³(about 1.5g/ inch ³).Can be compressed to density to blended absorbent core 42 at least up to about 0.25g/cm ³(about 4.0g/ inch ³), so that still can keep its improved flexibility and flexible its fluidic siphon level that improves simultaneously.The density value of top defined does not count the quality of any absorption gel material particle.Can or only carry out compacting to whole absorbent cores 42 to wherein selected part.Can make the adjustment of its fluid handling properties can satisfy specific needs to its compacting that figure is arranged.Such as, the density in the fluid target area can be very low, so that fluid collection speed reaches top level, and the density of the marginal portion of close core can be very high so that fluid siphon level reaches the highest.

In a particularly preferred embodiment, the absorbent cores of having improved 42 is hybrid yams of a kind of air lay, it is long by 15% 1.27cm, the polyester fiber of crossing through fold of every ultimate fibre 15 daniers and about 85% cross-linked cellulose fibres constitute, and it is compacted to density at last and is about 0.06g/cm ³(about 1g/ inch ³).

Blended absorbent core 42 can be used as whole absorbent cores, perhaps also can be used as in the multiple structure one or more layers.A collecting layer can be with or be with to used blended absorbent core 42.

Figure 21-23 shows the example of a core 42, wherein makes the sanitary towel 20 of a kind of " wing " with the multilamellar core material.Wing sanitary towel 20 is thicker in the central authorities of sanitary towel, and 22 and 24 place's cuttings must be thinner towards the edge.Sanitary towel 20 shown in Figure 22 and 23 can have length and bigger a plurality of layers the method (good conversely) of width dimensions is made by piling up on have the layer of a smaller length and less width.

In a stratification structure, can be all constitute one or more layers by cellulosic material or by the mixed layer of cellulose/can the form polymeric material of hydrogel.The content or the composition of fiber of these layers and/or absorption gel rubber material also can be different.Such as, the absorption gel rubber material that can use higher percent in each lower layer is to provide extra fluid storage capacity.

In other embodiments, in second group of fiber, also can comprise elastic fiber.The elastic fiber that is suitable for comprises that melt blown fiber is (such as those hydraulic pressure entanglement melt blown fibers with provide as the Fiberweb company of the complex of cotton fiber ^#In the 7102-102 product scope) or comprise those fibers of making by a kind of polyethylene/Kraton mixture (such as the sort of material of the thin film Exx-7 that is used for preparing Exxon company).

(ii) other types of absorbent core

Other absorbent core structures thing with extending performance comprises the non-bonding non-woven constructions thing and the textile structural thing of synthetic fibers.

Such as, can combine the making absorbent cores to non-woven constructions thing that comprises fibrous superabsorbent material (as Fibersorb) and various synthetic fibers.By adopting the different pattern and different fiber placement modes of bonding agent, can make made these non-woven constructions things that go out have extensile performance.

Adopt any or several in the various distinct methods described herein, can strengthen the stretching, extension performance of these non-woven constructions things.The method that is suitable for increasing extensibility includes, but is not limited to encircle ingot and rolls, and wraps in elastic fiber in the absorbent cores and adopt to encase those because of the fiber (such as the fiber shown in Figure 57 and 58) through the wrinkle or the tensible of curling.

A kind of suitable structure is by above-mentioned molten playing wind and stringing instruments property fiber and have superabsorbent material ^#7102-102 cotton fiber goods constitute.Superabsorbent material can be graininess also can be fibrous.In other alternative embodiment, the cross-linked cellulosic that described structure can contain through modification.Can be added to this cross-linked cellulosic in not adherent elastic fiber and the superabsorbent material and go.In some other embodiment, this crosslinked fiber can replace elastic fiber (if this crosslinked fiber has inherent extensibility), perhaps also can replace superabsorbent material.

(3) make absorbent cores have elasticity

Can be made into the absorbent cores 42 among any embodiment described in this description and still can not stretch, but and be elastic stretch.

Even absorbent cores itself does not have elasticity, be elastic stretch but also can be made into it.Just can make absorbent cores 42 extend or shrink on an elasticity bottom or the top layer by absorbent cores 42 is adhered to, thereby can make the made absorbent cores that goes out can elastic elongation with elasticated topsheet or egative film.

Sanitary towel's (or other absorbing articles) 20 also comprises any additional absorbed layer or other parts (such as parts described in those patents of quoting as the reference file).Such as, absorbing articles can comprise a collecting layer or place top flat 38 and absorbent cores 42 between the cross-linked cellulosic sheet.

C. egative film

(1) general aspects of preferred stock footage

Egative film 40 can not see through liquid, thereby can prevent make dirty the clothes of user of body fluid.Can make suitable egative film 40 with the material of wide range.These materials that are fit to comprise polyethylene film and laminated fabric embossing or not embossing.

The polyethylene film that is suitable for is produced by Monsanta chemical company and is introduced to the market as No. 8020 thin film according to the standard of XP-39385 according to the P18-0401 standard and by the Tredegar film article company of the TerreHaute of Indiana State by the Clopay company of Ohioan Cincinnati.

In an alternative embodiment of sanitary towel 20 (typical case of described sanitary towel 20 is: top flat 38 only covers main part 21, and does not reach the outside and constitute the limit tongue end face that may exist), egative film 40 can be made of two layers.In this case, egative film 40 can comprise that places the ground floor by soft material made of egative film on core side 40A.The purpose that ground floor is set provides a surface comfortable, not with irritating that is attached on the user health.

This soft layer can be made of any suitable material, such as being made of a kind of non-woven material.Soft layer preferably is made of a kind of hydrophobic non-woven material.

The second layer can place egative film 40 on underwear one side 40B, and can constitute by the impenetrable film of a kind of fluid.Have now found that a kind of thickness is that the low-density polyethylene material of about 0.01 to 0.05mm (preferably thickness is 0.02mm) is suitable as this second layer.Have now found that polyethylene film (the XP-39385 type product of selling such as the Visqueen branch company of Ethyl company) is especially suitable for use as this second layer.Egative film 40 also can be by making with respect to top flat 38 hydrophobic materials a kind of soft, similar dress material.The performance that has now found that polyester or polyolefinic fiber backsheet 40 is fine.A kind of material of particularly preferred egative film 40 soft, similar dress material is to authorize a lamination described in the US4476180 of Wnuk, that be made of a kind of polyester non-woven material and a kind of thin film on October 9th, 1984.

(2) make egative film have extensibility

Extensible egative film has a lot of possible types, and these egative films include, but is not limited to following embodiment.

In general, also can make extensile egative film 40 with the above-mentioned a variety of many technologies of the top flat that egative film has extensibility that can make.By a kind of machining (such as primer is carried out pleating, wrinkling processing or the ring ingot roll) can make stock footage extensile.By using the thin film of producing by a kind of extensible materials (such as above-mentioned Exxon film Exx-7) to form egative film 40, can make the egative film 40 of made have extensibility.

But, in general, be atresia as the things such as thin film that constitute egative film 40; Perhaps promptly use opening area provide hole also need by cover these opening areas, seal these opening areas, reducing the size of opening area or alternate manner, that thin film is become is liquid-tight.

The prescription that Findley sticker company that a kind of particularly preferred tensile egative film 40 is state of Wisconsin Wauwatosa produces number ^#A kind of extensile adhesive film of 198-338.The Findley adhesive film is a kind of impervious film of fluid that can extend 200-300%.It is why by preferably, but is because its elastic elongation also.

This thin film can be used in the sanitary towel 20 same as before, can adhere to absorbent cores 42 to a side of this adhesive film on a side 42B of underwear.Opposite side just will constitute the side 40B of egative film 40 towards underwear, and can be used as a underwear fastener adhesion bar.

In addition, can cover (perhaps " covering ") towards adhesive film one side of underwear one side 40B to the small part adhesion surface constituting to eliminate its cohesiveness.Also can cover the part of egative film at least towards the bonding side 40A of health.

Can cover the bonding plane that exposes with the suitable mode of many kinds.These modes include, but is not limited to adhere to one deck non-stick material covering the sticker of exposure, and a kind of dusty material (such as Pulvis Talci or corn starch) is coated onto or spreads on the sticker that exposes to small part.Can cover the sticker of egative film 40, and make the sticker of remaining exposure constitute specific underwear snapping adhesion figure towards the part exposure of underwear one side 40B.

In other embodiment, can make made adhesive film one side toughness, and a side there is not viscosity.A kind of suitable adhesive film with these character is the composite construction that a kind of a kind of nonwoven elastica to pressure-sensitive sticker that has the low elasticity coefficient constitutes, such as can being that the trade mark that Findley sticker company provides is ^#The adhesive film of 198-338, this adhesive film have a kind of adhesive film (trade mark such as Findlay sticker company is the film of H2301).Authorized people US5032120 such as Freeland on July 16th, 1991 and authorized among people's such as Allen the US5037416 and further describe (and use for other purpose) on August 6th, 1991 this class material.

In other preferred embodiment, egative film 40 can be made of a kind of extensile laminated construction.A lamination like this can be made of two layers or more a plurality of layer.For the lamination that is made of a plurality of layers, wherein each layer can have different extensibilities.Such as, egative film 40 can be the lamination that is made of the Findlay adhesive film, this film cover is on the one or both sides of extensile nonwoven sheet or a kind of extensile film.

D. the combination of top flat, egative film and absorbent core material

Sanitary towel 20 of the present invention can described from here top flat, the many different combination of egative film and absorbent core material and constituting.

As mentioned above, sanitary towel 20 can all be made of extensile parts.Can be selected from top flat, egative film and an absorbent cores of above-mentioned those materials and constitute by any such as the sanitary towel 20 shown in Fig. 1-3.Can be assembled into any in the possible combinative structure of many kinds to dissimilar top flats, egative film and absorbent core material.

Aforesaid alternative sanitary towel 20 can be made of some extensile building blocks and some not extensible building blocks.For example sanitary towel can be made of one of above-mentioned extensile building block at least, these extensile building blocks are by any general not extensible materials, perhaps constitute by some above-mentioned stock at least, wherein those stocks will obtain extending performance before it forms various different structures, thereby had obtained desired performance or reduced the totle drilling cost of sanitary towel 20.

Figure 23 A-23C shows the infinite example of and sanitary towel that some not extensible building blocks form extensile with some, also has many different examples, equally also within the scope of the present invention.

Figure 23 A and Figure 23 B show the sanitary towel 20 with an extensible top flat 38 and egative film 40 and not extensible absorbent cores 42.Absorbent cores 42 relative top flats 38 and egative film 40 support by the extensile material strips or the material band 101 of material 101, and these tensile material strips 101 are fixed on top flat 38 and the egative film 40.

Absorbent cores 42 constitutes the structure of slinging between top flat 40 in this embodiment, and top flat 38 and egative film 40 form a structure of surrounding the extensile similar bag shape of absorbent cores 42.

Can be in the sanitary towel 20 shown in Figure 23 A and the 23B (the particularly egative film 40 of sanitary towel) in order to cooperate with comfortable and along with wearer's underwear stretches.Employing has not that absorbent cores 42 superioritys of extensibility are in this sanitary towel, even when top flat 38 and egative film 40 elongations, the not extensible performance of absorbent cores can keep the wicking property of absorbent cores 42.

Figure 23 C shows a sanitary towel 20 with an extensile egative film 40 that combines with not extensible top flat 38 and not extensible absorbent cores 42, the advantage that has sanitary towel shown in the similar above-mentioned figure in the sanitary towel 20 shown in Figure 23 C, but the sanitary towel 20 in Figure 23 C also has several additional advantages.

When egative film stretched, the not extensibility of top flat 38 also allowed top flat 38 to keep its wicking property (top flat forms a compound absorption system together usually with suction core 42).

Also allow those to press close to wearer's body near those parts (top flat 38 and absorbent cores 42) of wearer's body and do not stretch in the sanitary towel 20 shown in Figure 23 C.Situation for adjusting according to the stretching, extension of wearer's underwear can adopt the way of adjusting egative film 40.

Sanitary towel 20 shown in Figure 23 C has a pair of machine-direction oriented along the extensile arrowband 99 of sanitary towel's one side towards human body.Arrowband 99 can be made of a kind of non-woven material, and arrowband 99 is preferably softish, so that provide a more comfortable surface for user.Arrowband 99 also is connected to top flat 38 on the egative film 40.This arrowband 99 can be used as " isolated component " (will be described later), and it more is not subjected to the elongation of top flat 38 and absorbent cores 42 and the influence of stretching, extension when egative film 40 ratios are not existed in this arrowband.

The several alternative embodiment of other sanitary towel that is made up of some extensile building blocks and some not extensible building blocks has the attachment that is used to fasten to the stretching, extension on the user underwear.These will be described in 44 (1) joints.

Except in conjunction with various top flat, outside the material of egative film and absorbent cores, some materials that limited here can be finished a plurality of functions, or can be used as a plurality of building blocks in an absorbing articles.

For example, some foamed materialss described here are suitable for use as absorbent cores, and these materials can be used as top flat and absorbent cores, and can finish the function of egative film.This can be by being coated onto impervious coating foamed materials on a side of clothes, and perhaps a side of handling towards underwear with other method makes its liquid impermeable.In another embodiment, top flat 38 can save, and egative film can be finished the function that top flat 38 is finished usually.

In addition, those materials of a building block [for example top flat (or an egative film or absorbent cores)] that are applicable to described here can be used for one or more different building blocks, promptly as long as these materials have or have the desirable characteristic of this ingredient after modification.

In addition, the mode of these extensile building blocks of manufacturing (for example top flat, egative film or absorbent cores) described here generally can be used for making any other extensibility building block.

E. the assembling of top flat, egative film and suction core.

Above-mentioned sanitary towel (top flat, egative film absorbent cores) can be fixing together with any suitable method that sanitary towel 20 can be extended.

In preferred embodiment shown in Figure 1, the size of each ingredient of sanitary towel 20 can be definite like this: make the edge of top flat 38 and egative film 40 outwards surpass absorbent cores 42 edges, egative film 40 comprises the extensile sticker film of one deck, absorbent cores 42 is placed on the end face of egative film 40, then, top flat 38 is placed on above the absorbent cores 42.The edge of the top flat 38 at the protruding edge that surpasses absorbent cores 42 is fixed on the edge of egative film 40.

As shown in Figure 1, preferably also top flat 38 along first seam crossing, for example, seam crossing 90 is fixed on the egative film 40.Seam crossing 90 is liquid permeable not preferably.Seam crossing 90 can form with any known method that is suitable for this purpose, for example can be by gummed, curling or thermal weld.Seam 90 is illustrated on the product that the limit tongue is arranged among Fig. 5, and this is the object lesson that stretches around the whole periphery of main part 21 as a seam.

Have found that this structure is enough to fix each ingredient of sanitary towel, and fixing building block face adjacent one another are not.Certainly, the front that is fixed on them as top some building blocks wherein of recording and narrating usually also is desirable.

Above-mentioned example is a preferred embodiment that is easy to make (other mode that each building block is coupled together also can be used).

For example, the present invention also comprises what is called " pipe " product, and in these products, the cladding material (for example top sheet materials) that can make a kind of energy see through liquid is fully enclosed in around absorbent cores and the egative film.Then, can be fixed up these building blocks together.In another structure, top flat can surround around fuse, and can be placed on besieged absorbent cores and be fixed on the egative film.

F. be used for sanitary towel is attached to the fastener of user underwear.

(1) general characteristic of preferred fastener.

Egative film 40 may comprise fastener 44 (or being used for parts or the attachment members that sanitary towel is attached to the underwear of user) towards underwear side 40B.

Fig. 3 is shown schematically in the central pad fastener, center tree pad adhesive linkage 44 for example, and it is used for sanitary towel is fixed to the fork district of a underwear.Central pad fastener 44 is fixed on main part 21 in the fork district of underwear.

Fig. 5 shows a lamellar fastener, and limit tongue adhesion coating 45 for example, limit tongue adhesion coating 45 are used to aid in the location behind the fork edge that those limit tongues 52 surround underwear.(will be described below).Limit tongue adhesion coating 45 be positioned on the outer surface of limit tongue 52 (promptly apart from that end of the longitudinal centre line L limit tongue farthest of sanitary towel 20) can by limit tongue 52 attached on the underwear or be attached to the location that keeps limit tongue 52 on the relative limit tongue.

Can be respectively cover on these adhesion fasteners with removable cover fillet or release liner (for example central pad release liner and limit tongue release liner, the two label is 50).In order to prevent that sticker is bonded on the irrelevant surface before use, should adopt and throw off the lining covering.The disengagement lining that is suitable for has description in United States Patent (USP) 4917697.

Though for purposes of simplicity of explanation, describe fastener by means of " sticker " this speech when beginning, the type of fastener is to be not limited to sticker.Desirable fastener comprises also except that comprising the sticker fastener and is not limited to binding type that for example combination of pressure sensitive adhesive bar, mechanical fastener and sticker and mechanical fastener will describe these desirable fastener kind and layouts thereof below in detail.

(a) adhesion fastener

The pressure sensitive adhesive that will adopt is coated onto egative film 40 on that side of underwear 40B with a lot of different figure or layouts.

The layout of these stickers can be used for various thin and occasions softish sanitary towel.In on March 19th, 1992 the disclosed title of submitting to by people such as Papa " shape of absorbing articles and sticker fastener " the W09/04000 international application as the application's reference paper, it discloses the layout (1) that can be used for following two kinds of purposes feels comfortably cool the health that wears the person of sanitary towel; (2) the longitudinal edge upset that reduces sanitary towel and tendency of gathering and minimizing are stirred and are reduced the tendency that the sticker that makes underwear contacts with pubes with wearer's body.

First instruction that people's such as Papa patent application provides is: make the overall width of sticker fastener can reduce the active force that underwear elasticity causes the tendency that sanitary towel's longitudinal edge oppositely stirs as far as possible near the width in the human body fork district that wears underwear.Second instruction that people's such as Papa patent application provides is: at least in certain embodiments, should be provided with a zone along the 20 longitudinal centre line L of sanitary towel, egative film 40 in this zone is not adhered on wearer's underwear, just can underwear be separated with sanitary towel, be similar to the W shape shown in Figure 10 thereby sanitary towel is deformed into by this core of egative film 40.

The 3rd instruction that people's patent applications such as Papa provide is: sticker should stir so that reduce end near the terminal edge 24 of sanitary towel, but can not be too approaching.Sticker should not be too near to terminal edge 24, and because of this sticker of end very slight stirring will causing contacts with wearer's body, the desirable distance that sticker leaves terminal edge 24 is to be not more than about 6mm, and preferably is no more than about 6mm about 3mm that adds deduct.

For reaching these identical purposes, can adopt the layout of bonding agent of the present invention, the sanitary towel that can adapt to wearer's body and be through the dynamic change of underwear on one's body is provided simultaneously.

The sticker that can adopt is arranged and is depended on and be to use extensile still not extensible adhesion coating.The part that is furnished with the sanitary towel of extensile adhesion coating above is extensile, containing not the sanitary towel of extensible adhesion coating can only stretch between the adhesion coating sticking patch usually, if adopt not extensible adhesion coating, preferably by desultory graphical layout adhesion coating sticking patch, so that allow sanitary towel between the adhesion coating sticking patch, to stretch.

Can be by multiple layout coating sticker, these layouts include, but is not limited to: (1) single adhesive regions or sticker sticking patch; (2) two parallel machine-direction oriented fillets that are positioned at the relative both sides of longitudinal centre line; (3) two inflexed arciform sticker fillets; And (4) a plurality of sticker sticking patch.If extensile adhesion coating can be applied as continuous or discontinuous pattern to sticker by above-mentioned layout (or other layout).As top pointing out, for not extensible adhesion coating, preferably sticker is applied as discontinuous pattern, include, but is not limited to alternate point, alternate etc.

Fig. 3 illustrates the layout that is used in the last preferred sticker of sanitary towel of the present invention.

Shown sticker is arranged and is comprised vertically rectangular block of 6 2cm * 2cm (about 3/4 inch * 3/4 inch) square dice and two 2cm * 6.4cm (about 3/4 inch * 2.5 inch).Each side that is arranged in longitudinal centre line has the end regions 28 and 30 of a rectangle part in sanitary towel, and each end regions that is configured in of these square block has a piece on each angle 27, should meet the requirement of centreline configuration longitudinally of a piece.

Can cover with fillet separately 50 on each sticker sheet 44, still, these sticking patch are preferably covered by single residual plate.Do not only making easy to manufacturely like this, and help consumer and there is no need to handle several little one covering fillets 50.

If sticker is tensile, its elongation preferably can reach the same amount of the described sanitary towel of Table I.

Suitable extending sticker comprises: tensile sticker itself, and the combination of extending sticker/egative film, can adopt any known available extending sticker.Suitable extending sticker/egative film combination includes, but is not limited to be used in non-extensile sticker on the tensile known stock footage, for example can be from Anchor Continental, Inc.3Sigma Divition of Covington, the sticker that is called 3Sigma2474 that OhiO has bought; The extensible adhesive-film of elasticity, the extensible adhesive-film of for example Findiey adhesive 198-338, or known elasticity for example can be from Minnesota Mining and Manufacturing Company of St, 3M * Po-o-o14 that Paul, Minnesota have bought; Or sticker for example 3M sticker 1442 be sprayed on the low elasticity coefficient thin film.

Suitable not extensible sticker can be that for example specification is those stickers of the described Pass of 0.6mil, for example the production number of buying from Century Adhesive is the product of A305-4, or from Anchor Cotinetal, Inc.3Sigma DivisionofCovington, the product that Ohio buys.The fastener of the not extending sticker that is suitable for has been described in No. 4917697 patents of the U.S. in more detail.

(b) mechanical fastener, fasteners such as friction fastener

The fastener that all various embodiment of the present invention described here use is not limited to the sticker adhering mode, can use at any known fastener that can be used for this occasion.

For example, can be the conventional VELCRO hook material of sanitary towel's 20 usefulness, or be fixed on wearer's the underwear with the fastener of following file description, these files are No. 4946527 patents of the U.S. of the Battrell of approval in August nineteen ninety, respectively at 1991 last October 22 and the U.S. 5058247 and No. 5116563 patents of authorizing Thmas on May 26th, 1992, and disclosed European NO0381087 patent application on August 8 nineteen ninety; Perhaps use foam and other high coefficient of friction material of great friction coefficient, for example authorizing the Korpman U.S. No. 4166464 patents, authorizing the people U.S. 4834739 patents such as LinkerIII and authorize those materials described in No. 5011480 patents of the people U.S. such as Gossens.

The kinetic tensile force by wearer's body on the 20B of underwear surface that acts on the sanitary towel 20 of wearer's underwear is the reason that causes many problems, and this reason will cause the bonding agent fastener to leave from underwear.On extensile absorbing articles, adopt mechanical fastener to be considered to useful especially, because mechanical fastener tends to reduce the influence of shearing force.The mechanical fastener that is engaged on wearer's underwear fabric will move with underwear, thereby alleviate the trouble that is caused by shearing force.

G. the optional building block of sanitary towel

Sanitary towel 20 of the present invention can also dispose optional additional building block, can make these additional building blocks have different extending performances if desired with any way described here.

Can dispose one or more additional infiltrations or water accepting layer in sanitary towel 20 of the present invention, these additional infiltrations or absorbed layer can be placed between absorbent cores 42 and top flat 38 or the egative film 40, or are placed on top flat and egative film between the two.An absorbed layer as shown in Figure 6, for example siphon layer 46 is placed between top flat 38 and the absorbent cores 42, and this siphon layer 46 can be thought second top flat, or " collecting layer of sponge shape ", or " collecting layer ".

In the embodiment shown in fig. 6, collecting layer 46 is laminations of non-woven material.Certainly collecting layer 46 must not be a pleated sheet.Here be used to describe single non-pleated sheet, pleated sheet, material strips, loose or adherent fiber that collecting layer and " layer " or " tablet " these two speech are not limited to material, the multilamellar of material or laminated, or other combination of these materials." layer " and " tablet " these two speech are not limited to the single non-foldable layer or the sheet of material.

Collecting layer 46 is two Z-shaped pleated sheets among Fig. 6, collecting layer 46 is to process by following specific folding mode, promptly when the time along transverse centerline incision sanitary towel, for the pleated sheet left-half, look at section to be down " Z " type, and right half part is " Z " type, collecting layer 46 is preferably folding in the requsst listed below, even it has a top 49, it presents a rectangle fillet on plane graph.Preferably approximately 227mm is long on the top 49 of collecting layer, and wide between about 25-38mm, top 49 preferably has one from about 0.5mm to about 4mm thickness (this upper range is big more, and the product of acquisition is thick more).Such foldable structure is having more detailed description on May 14th, 1992 among the disclosed PCT patent application WO92107535 by people such as Vissche.

Fig. 7 is a sectional view that is similar to the simplification of Fig. 6, provides the alternative structure of the building block of a sanitary towel 20.What place on core 42 in Fig. 7 is not a layer that separates that is positioned at absorbent cores 42 tops, and collecting layer 46 is integral layers (or building block), and it is the top layer by absorbent cores 42 structures of lamination.

Collecting layer 46 helps to improve above the absorbent cores 42 and is inner to excremental siphonage, as for the siphon performance of why improving exudate several important reasons is arranged, and by improving the siphon material exudate is distributed more equably on whole absorbent cores.

By improving the siphon performance, can also make sanitary towel 20 of the present invention make thinlyyer, collecting layer 46 can be distributed to transudate on the high surface area of absorbent cores, this absorbed layer 46 allows the more discharge liquor of sanitary towel's 20 absorptances, and the thick sanitary towel in the existing technology be rely on initial storage discharge liquor place vertically go up efficient absorption.Because the absorbent cores of these existing sanitary towels is quite thick, so only utilize the surface region absorbability of poor efficiency or side direction absorbability also can absorb a large amount of discharge liquors.Slim sanitary towel 20 of the present invention can the relatively large discharge liquor of absorptance, because the siphon material is distributed to discharge liquor on the big surface area of absorbent cores 42, can better He quickly vertically absorb discharge liquor in the absorbent cores 42 there.

Collecting layer 46 also can be used for discharge liquor is directed to the end (42D) of absorbent cores, and the liquid emission that is stored on the absorbent cores 42 will be tending towards disperseing to external radiation from the place of they storages.Because it is relative narrow that the absorbent cores 42 of sanitary towel 20 is compared with its length, the longitudinal edge 42C that liquid emission arrives absorbent cores 42 is faster than the end margin 42D that arrives absorbent cores.Collecting layer 46 is directed to the terminal 42D of absorbent cores 42 applicable to vertical siphon and discharge liquor, and this has just more effectively utilized the ability of absorbent cores, causes the probability of sewing thereby reduced the longitudinal edge 42C that arrives absorbent cores prematurely owing to discharge liquor.

The characteristic of collecting layer 46 is as follows; Collecting layer 46 should be a liquid permeable, and collecting layer 46 preferably also is submissive, soft feel, and do not stimulate user skin.It can be by any material of discharge liquor that can disperse by above-mentioned method for optimizing manufacturing.These materials can also have a top flat 38 that is fused to above it.Collecting layer 46 preferably has stretch property, and there are a face towards human body (or side) 46A and the face 46B towards underwear in this collecting layer 46.

Collecting layer 46 should be hydrophilic, and fiber or the yarn (55) of forming collecting layer 46 can be inherent hydrophilic, on the other hand can that it is become is hydrophilic by fiber is handled.Be used for fiber is become hydrophilic suitable method, comprise with surfactant and handling.By being included in the material in the collecting layer with a surfactant coated or the method that this material is dipped in the surfactant handled, about a kind of so more detailed discussion of hydrophilicity of processing is included in No. 4988344 patents of the U.S. of authorizing people such as Reising and No. 4988345 patents of the U.S. of the authorizing people such as Ressing.The hydrophilic of these fibers allows collecting layer 46 to pass through top flat 38 from following sucking-off liquid emission.

Collecting layer 46 can be made of with the absorbent cores identical materials many, and collecting layer 46 can be made of fabric or non-woven fleece, and these materials can be synthetic, or the material natural with part of partial synthesis.Suitable synthetic fibers comprise polyester, polypropylene, polyethylene, nylon, viscosity staple fibre, or cellulose acetate, preferentially select polyester fiber for use.Suitable natural fiber comprises: cotton yarn, cellulose, or other natural fiber.Collecting layer 46 can be a capillary channel fiber among cross-linked cellulose fibres or the described as an example below embodiment to small part also.

Collecting layer 46 also can be by the constituting of above-mentioned material, for example by the hybrid yams that is similar to the above-mentioned fiber that is used for blended absorbent cores, or the constituting of any equivalent material or material.

Be used for the fiber of absorbed layer 46 or yarn 55 and can be any length (from constant length to successive filament.The desirable length of fiber 55 be at about 2.5cm between the 7.5cm (at about 1 inch to 3 inch), preferably about 3.8cm (about 1.5 inch).The desirable danier number of fiber 55 is between every approximately ultimate fibre 1 and 3, preferably about 1.5.

The fiber 55 best great majority of collecting layer 46 are oriented in a direction, normally make the orientation of fiber along machine direction (MD) when making collecting layer 46.When being positioned at collecting layer 46 on the product, can so that the orientation of most of fibers longitudinally, also can be along laterally (even fiber 55 is roughly parallel to the longitudinal centre line L of sanitary towel 20 or is parallel to transverse centerline).

Here the phrase of usefulness " substantially parallel " in centrage is meant comprising with each centrage at an angle fiber separately.As long as being oriented in of fiber is vertically more approaching than transversal orientation, just think that these fibers are arranged essentially parallel to longitudinal centre line.

By fiber 55 in the collecting layer 46 being orientated along the longitudinal can be used for causing the liquid emission siphon and distribute better that is stored in collecting layer 46 towards the end of absorbent cores 42 42D.If 55 great majority of the fiber in the collecting layer are parallel to longitudinal centre line L, certain processing for example encircles ingot and rolls usually and will finish on vertical extensile absorbed layer 46 so.

Collecting layer 46 can have any suitable size, collecting layer 46 needn't extend on the whole width of absorbent cores 42, absorbed layer 46 can be the bar that for example is placed on the folding top 49 of the Z direction that is similar to shown in Fig. 5 and Fig. 6, (size of this collecting layer also with among Fig. 5 and Fig. 6 similar).

Collecting layer 46 for non-woven fleece constitutes can various technology make.These technologies include, but is not limited to followingly be arranged as from low to high by desirable order: moltenly blow, spunbond, carding process, the latter comprises (putting in order from high to low by desirable degree) heat bonding, bonding by air, powder is bonding, latex is bonding, solvent welding, or the most desirable spunlaced technology.Those included technologies of above-mentioned combing method are preferable, because make fibre orientation at a single direction in these technologies easily.

Can buy the product that is fit to do " collecting layer " 46 on market, comprise 70%/30% rayon/polyester fiber, SONTARA has more at large described the SONTARA fiber in the United States Patent (USP) 4950264 and 5009653 of authorizing Osbornr as is well known.

In a concrete desirable embodiment, collecting layer 46 is that collecting layer 46 is the spunlaced non-woven sheets of the polyethylene terephthalate of a 35g/m2 (or PET) preferably by the nonwoven sheets of the fibrous jet injection of a moistening forever.The jet jet fiber of this class is by Veratec Company of Walpole, Massachustts, production.Spunlaced nonwoven sheets is added man-hour, preferably can make its most of fiber along on the single direction orientation.

The fiber of this specially suitable collecting layer 46 materials is by the PET resin manufacture, and is coated with the permanent wettable coating CELWET of last layer." forever wettable " speech here is meant that fiber finishes sinking being less than or equal in 7 seconds when testing by ASTMD1117-74 hanging basket sinking method.

This CELWET coating is particularly suitable for being coated in to have by porous membrane or has on the top flat of forming according to the wet method entanglement non-woven fibre described in the U.S. Patent application 07/810744 (December in 1991 was submitted to by people such as Gree on the 17th) 38.Because after the fiber wet method entanglement process that this applying coating is crossed, keeping good hydrophilicity, and be easy to absorbing blood.

In another concrete preferred embodiment, collecting layer 46 is spunbond polypropylene nonwoven CELESTRA fabrics that are called P-9 of being made by Fiberweb Group.

As required, in sanitary towel 20, can also attach two each vertical limit 22 outwardly directed limit tongues 52 from sanitary towel 20, limit tongue 52 can be Any shape, the limit tongue 52 that is fit to can be made according to the technology instruction in the following patent for example, these patent documents are: No. 4589876 patents of the U.S. that licensed to Van Yilburg on May 20th, 1986, licensed to No. 4687478 patents of the U.S. of VAn.Tilburg on August 18th, 1987, be called No. 071769891 patent application of the U.S. of " absorbing articles that has limit tongue and different elongation performances district " on October 1st, 1991 by the name that people such as Larash submit to, on February 7th, 1992 was called No. 07/832246 patent application of the U.S. with inwardly folding pleating limit tongue absorbing articles by the name that people such as Niihara submit to, and on May 21st, 1991 is by No. 07/707233 patent application of the U.S. of people such as Osborn submission " having for being attached to the sanitary towel that wearer's underwear extends laterally part " by name.The open file of these patents is as the application's reference paper.

Following example further illustrates practical application of the present invention, has particularly illustrated to have those sanitary towels same structure, that utilize capillary channel fiber.Certainly, these following examples are not the restrictions to the included scope of absorbing articles of the present invention.

The liner that example 1 is thick

Sanitary towel utilizes following parts manually to make, can be with reference to Figure 18 in order to be assembled into product.

Top flat 38 can be made according to No. 4463045 patents of the U.S., encircles the ingot roll extrusion then so that make top flat have the performance of longitudinal extension.

Absorbent cores 42 is that the superabsorbent material laminated product is being cut a lot of slits in order to produce vertical extensile performance on the absorbent cores 42 or on its part as mentioned above.Absorbent cores shown in Figure 180 has been cut a lot of slits in petiolarea 28 and 30, and slit is not cut at 32 places in the center.Egative film 40 be one by Findly AdhesiveCompany of Wau Watosa, Wisconsin makes is called as Formula ^#The elongational viscosity thin film of 198-388.

The described sanitary towel 20 of Figure 18 preferably also comprises one deck capillary channel fiber layer 150, thick liner comprises the print 152 of capillary tube fiber, print fiber 152 is cancelled in following routine II and the thin sanitary towel described in the III, and the capillary channel fiber layer is assembled formation bunch fiber 154 gradually at the center, and sanitary towel 20 further comprises wrinkle BOUNTY (TM) tissue layer 156 and polyethylene end protection 158.

Figure 18 shows a preferred sticker that is used for this extensible embodiment of sanitary towel and arranges, comprise six 2cm * 2cm (about 3/4 " * 3/4 ") square sticker bar 44 and the machine-direction oriented rectangular strip 44 of two 2cm * 6.4cm (about 3/4 " * 2.5 "), arrange a rectangular strip in the both sides of longitudinal centre line L.Those arranged in squares are wherein respectively arranged a square bar at each petiolarea in the petiolarea 28 and 30 of sanitary towel 20, respectively arrange one in each angular region 27, and longitudinally centre line L is respectively arranged one.

Sticker bar 44 can be tensile, not extending or some bars are tensile and other are not extensible.

Can cover with isolating release liner or cover fillet 50 on each sticker bar 44.But for easy manufacturing, these adhesion bars are preferably covered by release liner thin paper of one whole, make wearer's several little single cover fillets 50 of need not tearing like this.Can adopt any commercially available antiseized lining in a desirable embodiment, release liner can be replaced by a packing, this packing promptly is the packing of a single sanitary towel, is again that a sack of adorning used sanitary towel was for example authorized the sort of packing described in No. 4556046 patents of the U.S. of Swanson on the 3rd at December in 1985.

Capillary channel fiber preferably can curl substantially, suitable capillary channel fiber is that the trade mark of buying from Eastmar Chmical Company is SW194, the SW194 fiber comprises the short staple of a combing, this fiber is the filling bag of every inch 7.8 creases, and H one shape cross part is arranged, and its channel width is 37 μ m, passage is 48 μ m deeply, its danier number is about 22dpf, preferably uses long 15cm, weighs the capillary channel fiber of 0.75 gram.

In manufacture process, the top flat that rolled of ring ingot is cut into desirable size, there is one the model of 5cm * 18cm perforate to be placed on the rear side of top flat, and presses spiral spray with Findley 4031 stickers.(seeing Figure 18 A)

By hand capillary channel fiber SW194 be laminated to the sticker jeting area in the heart, and make the direction of these fibers be parallel to the major axis of top flat, preferably capillary channel fiber is covered at least in part at least some holes of top flat.These capillary channel fibers are extend in the hole of top flat at least in part.

By hand capillary channel SW173 is pressed into a sample (direction of its fiber is parallel to the major axis of absorbing articles) in the heart in capillary channel fiber, has so just realized the pre-assembled of top flat and capillary channel fiber.

For simplicity, be recessed into remaining step that pattern is finished this program with one, this Findley adhesion egative film (the polyethylene egative film that has adhering agent layer and separate paper) is placed in the mould, this has superabsorbents (or the gel material that absorbs of slit, or " ATM ") laminated core is placed on the whole egative film, and crepe paper (BOUNTY) is arranged on this AGM absorbent cores, the package for preparing above is placed on the crepe paper, as shown in figure 18.By covering crepe paper with the prepackage accessory, these parts of absorbing articles are controlled to just can cover die edge but do not draw very tightly so, to prevent that the tendency that begins to pull out from appearring in these parts from mould, bonding with egative film with binding agent this edge, pressurize simultaneously.

These article are shifted out from mould, and the end is pressed onto the appropriate location, remove antiseized paper, add the polyethylene fillet of upper end protection, the fixing sticker fillet of underwear is arranged on this absorbing articles from the behind of egative film with rivet bucker.With from Lonza, Inc, Willia sport, the outer surface of the commercially available 0.01 gram PEGOSPERSE surfactant spraying top flat of PA.

The art condition of pressing of finished product is as follows:

Long 197 ± 1 core liners wide (millimeter), 81 ± 2 core cores wide (millimeter), 70 ± 0 liner thickness of weight (gram) 2.57 ± 0.04 liner length (millimeter) 226 ± 1 cores of heavy (gram) 9.82 ± 0.12 laminated core of parametric technique condition liner itself are (at 9 gram/cm²Down, millimeter) 15.5 ± 0.51 core thickness are (at 9 gram/cm ²Down, 1.47 ± 0.076 seal lengths (millimeter) 8 ± 1 millimeter)

The extending adhesive film egative film of component technology condition polyethylene ring ingot grinding forming film top flat about 23cm * 13cm (pressing United States Patent (USP) 4463045) capillary channel fiber SW194 (Eastman) 1.5g capillary channel fiber SW173 (Eastman) 0.5gFindley 23cm * 13cm (Formula #198-338) wrinkle BOUNTY napkin is shaped ^*Fixedly rectangular of 6 1.9cm * 1.9cm of underwear adhesion coating

With 2 rectangular separate papers of 1.9cm * 6.4cm as required surfactant (PEGOSPERSE) 0.01 gram white polyester fabric 10cm * 1.9cm of being used for the end cut the center that absorption gel rubber material (AGM) core 70mm * 193mm of slit does not cut slit; Core gross weight 2.6g has 2-1.9cm and does not open narrow 0.7 gram polyacrylate AGM seam central area Findley sticker-4031 0.05g that contains

* with reference to Figure 18 (38) shape, this shape is for providing the zoarium on the anatomical configurations to design.

The thin liner of example II

With reference to Figure 18, except using CCF SW173 fiber replaced C CF SW194 fibrous layer 150 and fibre debris of no use 152, the assembling of thin suction liner is identical with thick liner.

The assembling of this product is as follows, and with capillary channel fiber CCF SW173, it is long to be cut into 18cm, adopts 0.75 gram fiber, switches to size encircling the top flat that ingot rolls, and pad is placed on last slice bottom surface one side and applies Findley 4031 stickers (spiral type) .At gel regional center CCF SW173 fiber, make fiber be arranged essentially parallel to the top flat long axis direction with hand.The Findley egative film is layered on the unfolded plane, AGM lamination absorbent cores is placed on the Findley egative film, make wrinkle BOUNTY paper (shape is similar to top flat) centering on the lamination absorbent cores.Make top flat/capillary channel fiber prepackage accessory centering on crimped paper.Fixing prepackage accessory, and make all edges smooth.Roll the edge and make its sealing.Tear separate paper from cushion back, tear and remove these paper on 2 or 3, then polyester fiber is placed on the absorbing articles end, the technical conditions of the product that configuration underwear fastener (PFA) on liner is with 0.01g PEGOSPERSE surfactant spraying top flat. finishes are as follows: long (mm) 201 ± 1 center liners wide (mm) 85 ± 1 center cores wide (mm) 65 ± 1 liner thickness of long (mm) 232 ± 4 laminated core of heavy (g) 2.54 ± 0.09 liners of heavy (g) 8.50 ± 0.18 laminated core of parametric technique condition liner (9 gram/cm²Down, 5.36 ± 0.13 core thickness (9 gram/cm millimeter) ²Down, millimeter) polyethylene shaped film topsheet 23cm * 13cm (the ring ingot rolls, and presses United States Patent (USP) 4463945) capillary channel fiber SW173 (Eastman) 0.75g of 1.88 ± 0.76 component technology conditions weighs

The square bar of 6 1.9cm * 1.9cm of * PFA (the fixedly adhesion coating of underwear) that the extensible adhesive film egative film～23cm of the long Findley of 18cm * 13cm (Formula #198-338) wrinkle BOUNTY napkin is shaped

Do not cut the AGM core of slit in PEGOSPERSE 0.01g white polyester fabric 10cm * 1.9cm center of being used for the end on demand with 2 rectangular separate papers of 1.9cm * 6.4cm, the gross weight 2.5g of 65mm * 193mm core contains 0.7gAGM and has 2-3/4 " does not cut center Findley 4031 (sticker) 0.05g of slit

* as routine I

As mentioned above, in a preferred pattern of this extensile sanitary towel 20, the core of capillary tube fibrous layer 150 can gather the wrinkle hold together into one little " loop " or fiber " bunch " 154, " loop " or " bunch " 154 closely 38 contact with last slice by stretching on the capillary channel fiber course, and loop or bunches 154 is positioned near the center of whole absorbing articles, it can collect fluid fast like this, again fluid transfer is arrived the remainder of capillary channel fiber layer, and flow into all layers of depositing of fluid of absorbing articles therefrom.

This " loop " or bunch advantage be not only to make capillary channel fiber to focus on the place of fluid impact absorbing articles, but also make constitute loop or bunch the orientation of capillary channel fiber basically along the Z direction, so just make fluid obtain reinforcement along flowing downward of these article Z direction.Illustrate below and have an absorbing articles that is located substantially on the capillary channel Z direction fiber cluster at center.

Example III, have the liner of fibrillar center bunch

Make capillary channel fiber layer described here (15cm long) wrinkle hold together the heart therein and form the ellipse garden shape fiber family of a protuberance a little with following size: by the wideest point calculate along the about 5-7.6cm of directions X (vertically); By the wideest point calculate along the about 3.8cm of Y direction (laterally); Along Z direction 5mm-10mm.

Available any suitable method maintains the shape of fiber cluster, normally makes fiber cluster pass a qualification slit on paper or hydrophilic polymer sheet.Adopt step described here, fiber cluster be configured in the absorbing articles, and make this fiber cluster be positioned at the table top flat the center with closely contact (as described above) with top flat.

As sanitary towel the time, can make for example interior lip to the shape of absorbing articles, so that pass through fiber cluster absorption fluids to greatest extent.In a kind of alternative style, be to cut and form a branch of open capillaries passage fiber along Z direction tufting shape with curving annular fiber end in the fiber cluster.In another embodiment, be the capillary channel fiber layer that constitutes the fiber cluster bottom be positioned at whole or in part on this absorbing articles in the absorbent cores of the absorbing articles of wet-laying or dry-laying, rather than on the top of absorbent cores, in one embodiment of back, the lamination absorbent cores that can adopt commercially available gel rubber material (AGM) to constitute by two outer tissue layer and an absorption that is clipped in the middle.Can make the capillary channel that is positioned at the fiber cluster bottom slide into the inside of the stratiform thing that includes AGM.

Example IV, ultra-thin liner

With reference to Figure 18, the assembling of ultra-thin liner, except the fragment that does not use capillary channel fiber, all the other are all identical.

The assembly parts of this product are as follows, the top flat that the ring ingot was rolled switches to certain size, template is placed on the beneath of this top flat and coating Findley 4031 stickers (spiral type), the Findley egative film is layered on unfolded, the AGM laminated core of cutting slit is placed on the Findley egative film, makes wrinkle BOUNTY paper (its shape is similar to top flat), top flat is placed on above the crepe paper with laminated core centering, these parts are fixed, simultaneously the edge is glossed.Roll these edges and make its sealing, open separate paper, tear and remove 2 or 3, then dacron fabric is placed on the end of article, on this liner, dispose fixedly underwear fastener (PFA) from the back side of liner.With 0.01g PEGOSPRSE surfactant spraying top flat.

The technical conditions of finished product are as follows

(mm is at 9 gram/cm for center width (mm) 65 ± 1 liner thickness of heavy (g) 8.5 ± 0.18 laminated core weight (g) 2.54 ± 0.09 liner length (mm) of parametric technique condition liner 232 ± 4 laminated core length (mm) 201 ± 1 pad centers width (mm) 85 ± 1 cores²Under the pressure) (mm is at 9 gram/cm for 2.79 ± 0.25 core thickness ²Under the pressure) 1.88 ± 0.076

The polyethylene shaped film topsheet 23cm of component technology condition * 13cm, (encircle by United States Patent (USP) 4463045 ingot rolls) extensible adhesive-film egative film～23cm of Findley * 13cm, (FOR #198-338) wrinkle, (BOUNTY) the * PFA of napkin molding, (underwear fastener adhesion bar) 6 1.9cm * 1.9cm side's bars

Do not cut the AGM of slit in PEGOSPERSE 0.01g white polyester fabric 10cm * 1.9cm center of being used for two ends on demand with 2 rectangular separate papers of 1.9cm * 6.4cm; Core; The gross weight of 65mm * 195mm core is 2.5g, contains 0.7g AGM center and has not cut 2-1.9cm slit Findley 4031 (sticker) 0.05g

* as described in the routine I

4. alternative embodiment

In some alternative embodiment, can be folding by adopting, crooked, fold, each ply and the method that is fixed up change the structure of each regional building block of sanitary towel, can adopt to be included in the open european patent application that above-mentioned Buell submits to, one or more structures that above-mentioned U.S. Patent application of being submitted to by people such as Visscher and the name of being submitted on April 28th, 1992 by Osborn are called described in the U.S. Patent application No.07/874872 of " thin usually soft sanitary towel " are finished these remodeling.

In other alternative embodiment, some additional building blocks can also be provided in sanitary towel, the similar tissue paper of describing in detail in the United States Patent (USP) 5009653 that licenses to Osborn of using wet-laying and/or the sponge shape collecting layer that can see through liquid for example can be provided in sanitary towel.

In other alternative embodiment, can make crooked shape to sanitary towel.

The shape of sanitary towel does not bend though typical hygiene towel of the present invention its each building block when stretching can be elongated to enough degree together, but in further embodiments, the shape of sanitary towel can produce bending when each building block of sanitary towel stretches.

Though described the desirable embodiment of some sanitary towels,, utilized the solution of the present invention can give the performance that these sanitary towels stretch for a large amount of different embodiment of sanitary towel that describes in the literature.Part in these sanitary towels is disclosed in respectively in the following U.S. Patent application: by the No.07/605583 patent application of people such as Visscher in the submission on the 29th of nineteen ninety December, respectively on April 23rd, 1991 with license to the United States Patent (USP) 5009653 of Osborn August 21 nineteen ninety and No. 4950264, license to No. 4940262, the United States Patent (USP) of Salerno July 10 nineteen ninety, license to Osborn April 17 nineteen ninety, people's such as III United States Patent (USP) 4917697 licenses to the United States Patent (USP) 4911701 of Mavinkurve March 27 nineteen ninety; License to the United States Patent (USP) 4900320 of McCoy February 13 nineteen ninety; License to the United States Patent (USP) 4687478 of Van Tilburg on August 18th, 1987; License to the United States Patent (USP) 4608047 of Mattingly on August 26th, 1986; License to the United States Patent (USP) 4589876 of Van Tilburg on May 20th, 1986; License to the United States Patent (USP) 4285343 of McNair on August 25th, 1981; License to the United States Patent (USP) 3397697 of Rickarb August 20 nineteen sixty-eight; And license to the United States Patent (USP) 2787241 of Clark April 2 nineteen fifty-seven.

" linings of short underpants " are meant that some volumes do not have the women at the such big absorbing articles of the sanitary towel that intermenstrual period uses.The name that licenses to Osborn on April 19th, 1988 is called have been described some in the United States Patent (USP) 4738676 of " short underpants lining " and has made the fit absorbing articles of short underpants lining form.

" article of the human of incontinence " be meant mat, underwear (by means of the solid means of congenic strain for example belt etc. be fixed to the mat of human body suitable position), be used for the finished product liner of absorbing articles, the assistant product that is used to absorbing articles is gained in strength, briefs day mattress etc., they can wear for the people of adult or incontinence.Having the article that the people of the suitable incontinence of extensible building block uses is disclosed in the following United States Patent (USP): the United States Patent (USP) 4253461 that licensed to people such as Strickland on March 3rd, 1981; License to the United States Patent (USP) 4597760 and 4597761 of Buell; United States Patent (USP) 4704115 already mentioned above; License to people's such as Ahr United States Patent (USP) 4909802; License to people such as the Gipson United States Patent (USP) 4964860 in (October 23 nineteen ninety); And the U.S. Patent application of submitting on January 3rd, 1991 by people such as people such as Noel and Feist respectively 07/637090 and 07/637571.

Although focus of the present invention is that characteristics of the present invention also can be given for example these class article of diaper on the absorbing articles that concentrates in the interior crotch district that user wears, diaper is that the people of baby or incontinence wears and is solid absorbing articles around the wearer waist.

Fit diaper with extending performance has description in following two pieces of United States Patent (USP)s: licensed to the United States Patent (USP) 3860003 of Buell and the U.S. Patent application 07/715152 that on June 13rd, 1991, people such as Buell submitted on January 14th, 1975.

Though all these patents are all quoted as the reference file in this application with the description of patent application (and the patent of quoting as proof above and relevant foreign patent application thereof) and the publication of submitting to above, but, obviously can not think that these files of quoting as proof have as a reference pointed out or disclose the present invention, can not think in commercial material of having described that can buy or product prompting or disclose the present invention.

5. test method

The extensibility measurement of sanitary towel or other absorbing articles is finished on No.559A type EME cupping machine, and this testing machine is a kind of tensile test apparatus of permanent rate of extension, and it can be bought from EME company (P.O.Box 187 Newbury, OH 44065).

The EME cupping machine is furnished with computer, and it can provide distance and act on the liquid crystal display of power on the sample, and this distance be the distance of chuck end from the answer position of reference, power be chuck end with reference to the recovery position each apart from the power that acts on the sample.

All tests are carried out under 50% humidity and 23 degree Celsius, will carefully take care of sample before test, prevent any stretching, and the sample that should take out from 5 like products respectively for every batch of test repeats test.If the test data of any sample is within the desired protection domain of the application or within the ultimate value this product will be considered within the protection domain of claim of the present invention.

A. measure the method for the extensibility of 2.54cm (1 inch) center material bar.

Step 1

For the sample of measuring the longitudinal extension rate

With from Thwing Albert, Philadelphia, PA buys ^#1The accurate sample cutter of-12 type JDC downcuts the wide material strips of 2.54cm (1.0 inches) from the centre of absorbing articles, should be along the longitudinal centre line cutting of absorbing articles for the specimen material bar of using in this method; The length of material strips should reach the total length of that absorbing articles section that is cut this sample.

Be used to measure the sample of cross direction elongation

Utilize the JDC sample cutter from cutting the wide material strips of one 1.0 inch along the position that is parallel to the cross central line of this absorbing articles.As the material strips of the sample of measuring cross direction elongation can be to downcut from be parallel to the wide part of an inch that cross central line downcuts along arbitrary of this absorbing articles.Sample needn't pass through cross central line.

Certainly, when cutting sample, should cut off that part of of absorbing articles, thereby make the wide sample of whole this inch comprise one of absorption piece of this absorbing articles at least.(" absorption piece " will be in following qualification.) therefore, this sample should not cut from the position near a transverse edge of absorbing articles, because the sample at this position contains the absorbing articles at end seal place.

Be used to measure the sample of vertical and horizontal percentage elongation

The sample that is used to measure the longitudinal tensile strain rate should be cut from the first absorption of sample article.Be used to measure cross direction elongation sample should from and first kind of sample same-type, the second absorption of sample article (being a kind of identical product).(though the sample that cuts from product is for measuring along a certain direction percentage elongation, and this sample can be used as any test described here too).

Step 2

Take off whole viscosity cover strips from sample.If sample has the sticker fastener, can be by applying bonding fastener, so that remove the vestige of all bonding agents with Pulvis Talci or corn starch.

Step 3

This sample is layered on the platform with throwing the reins to, makes medial that side of sample up, measuring samples length is accurate to 0.25cm (0.1 inch)

For the application's claims, be meant that sample length is along the sample size perpendicular to 1 inch width.The length of sample can obtain by the length of measuring samples absorption piece.(like this can with total length by direct measuring samples the length of definite sample compare).

Sample length equals the length of the most apneusis receipts parts of sample.If sample is folded or bending (for example in the process of taking out from a packing), before the length of measuring this absorption piece, the end of sample will be flattened.By a ruler is placed on the sample upper surface, and gently cover the ruler that covers the sample end downwards, pasting till flat surface flattens towards the surface of underwear side, so just finished the step of flattening sample up to the end.

" absorption piece " is commonly referred to as main absorption piece as product at this, and for example the absorbent cores of this product can also comprise second top flat that for example plays siphon or storage effect that some had been described.Yet the connotation of " absorption piece " does not comprise common only be suitable for the doing top flat of absorbing articles and those parts of egative film.

To the above the longest absorption piece measurement of length of getting should not comprise the outside that may be positioned at any end seal on the sample or among those parts of absorption piece because these parts of absorption piece generally do not play Absorption.

Step 4

Each end of on cupping machine, clamping sample with the wide chuck of 7.6cm (3 inch).Adjust the chuck of cupping machine, they are separated in opposite direction each other (even they will draw back along 180 degree angular direction, should make sample centering on chuck, and make the chuck clamping force greatly to can prevent that sample from any slip (this is in being applicable to all test methods) taking place on chuck.

The outermost edges (its free end) that should make chuck when sample is clamped is from the inwardly about 1.3cm (about 0.5 inch) of the end edge of the most apneusis receipts parts.When the most apneusis receipts ends of the sample marginal position determining to be placed on the testing machine chuck, the longest absorbing component may be positioned within the sealing of sample upper end or that section sample part in the outside should not count.

Step 5

With the measurement length adjustment of cupping machine than the length of absorption piece (as above measured) lack the length of that part of length (generally being 2.54cm) that one section quilt sandwiches the absorption piece of each chuck, stretch with the crosshead speed of per second 0.93cm (per second 0.367 inch).

When sample reaches measurement length, the ergometer of assay device is transferred to zero-bit.Setting starting point begins in 20 gram force effect F image data.(utilize these 20 gram starting forces commonly used to even up some loose part that may be present in the sample at least.

Carry out power and elongation measurement by desired number of times, and finish test.The initial length of sample is the longest absorption piece elongation.For said that power of claims of the application is exactly to follow the effective power value of reading on testing machine in above program back.

For any elastica of the vertical side of the edge that makes assimilate is decreased to bottom line to the influence of result of the test, adopted to cut the wide material strips of this 2.54cm inch.(absorbing articles of the present invention does not preferably have such flexible member.Yet also can add optional elastic strip).

When measuring according to this test, 1.0 the absorbing articles material strips of inch is less than or equal to about 20 bearing, 50,100,150,200,300,400, or during 500 gram forces, it elongation longitudinally preferably can more than or equal to its initial length 105%, 110%, 115%, 120%, 125% or bigger.The absorbing articles material strips of this 2.54cm laterally preferably also can extended when bearing onesize power.This material strips maximum elongation rate under the effect of these power reaches as high as 110%, 120%, 130%, 140%, 150%, 160%, 170%, 180%, 190%, 200% or bigger.Specified in this manual scope can make up by any way in claims of the application.

Measurement to the elongation of the vertical and horizontal of absorbing articles can be carried out according to the method for the vertical and horizontal elongation of measuring 2.54cm inch material strips.In this case, preferably make the elongation of absorbing articles can be in front in each joint on the numerical value of defined.

Although absorbing articles can have length arbitrarily, have a absorption piece the longest for the absorbing articles that is used in the underwear, for example preferably have the absorbent cores that initial length is less than or equal to about 30.5cm.The width of the absorption piece of absorbing articles preferably is less than or equal to about 7.6cm, is less than or equal to about 6.35cm for better.(on the other hand, the length of diaper absorbent cores is wider than 7.6cm usually greater than 30.5cm.) in addition, in certain embodiments, the thickness of absorbing articles can be less than or equal to about 5mm's.

Absorbing articles preferably have one for make the elongation of this material strips reach its initial length or above other length that limit needed power can be more than or equal to the power barrier of 1000 power that restrain 160%, 150%, 140%, 130% or more for the moment.

But but absorbing articles had better elastic elongation or permanent deformation, and when being elongated to one of above length with convenient material strips, it can return to a size that is less than or equal to its extended length after tensile force is removed.

B. measure the method for absorbing articles percentage elongation

The sample that is used for this test is whole absorbing articles, and this test just is used for measuring the longitudinal tensile strain rate of absorbing articles.Cross direction elongation is according to the test method measuring of front.

The whole absorbing articles that is used as sample in this test should be tested by above step (2)-(5), should be with reference to following supplementary notes when carrying out step 3.

If sample can not flatten the length of (for example exist shrink elasticity) the longest absorption component easily and should spread out (if it is pleating) at the pleat sample and sample is remained under the condition of the curved shape that it is had when box takes out and measure, and utilizes the length of tailors strap measurement along the longest absorber element of the arc measurement that is formed towards the surface of underwear side by absorbing articles.

This absorbing articles affords one when being less than or equal to about 20,50,100,150,200,300,400,500,600,700,800,900,1000g or bigger power at it, the elongation of vertically (promptly longitudinally centrage) preferably can more than or equal to initial length 105%, 110%, 115%, 120%, 125%, 130%, 140%, 150%, 160%, 170%, 180%, 190%, 200% or bigger.The power with respect to the longitudinal tensile strain rate herein is higher than test measured power value 2.54cm is rectangular of utilizing the front possibly, and this is because what use in second test is whole absorbing articles).

This absorbing articles preferably has a power barrier, and this power barrier can make this rectangular elongation will surpass 160%, 150%, 140%, the 130% needed power for the moment of its initial length or above specified other length can be more than or equal to 1200,1500 or 2000g.

C. measure with respect to the method for the product shearing force that causes by underwear with the span relation

1. first method 1 restrains triggering power

This tests employed sample is whole absorbing articles.

This sample that is not subjected to exertin is layered on the platform, makes medial that side of sample up.Measure the length of the most apneusis receipts parts of this sample, be accurate to 0.25cm (0.1 inch).Being used to of subsequent step by above test method A and B (3) measures the same explanation of absorption piece and tests.Yet this test only relates to measuring samples performance (direction that promptly is parallel to longitudinal centre line) longitudinally.

If sample has bonding fastener, remove the adhesion cover strip from sample, get one by Test Fabrics, Inc.of Middlesex, MJ, production ^#429W bafta (3 inch of standard are wide) covers this fastener 2.54cm (1.0 inch) in an end of fastener long.

In order to help to limit the border of great majority adhesion fastener, can be placed on sample under the uviol lamp.The way of spreading Pulvis Talci or corn starch by the unmasked portion to the adhesion fastener is eliminated the vestige of the sticker on this adhesion fastener remainder.

The bafta bar should long enough, so that the ora terminalis (the actual ora terminalis of product that promptly comprises absorbefacient and non-absorbent parts) that its free end (non-attachment end) elongation surpasses the sample adjacent with the 2.54cm top of the fastener that is covered by this bafta bar at least 1.3cm (0.5 inch) at least.

With 17.6 gram/cm ²Pressure (utilize a weight) equably and be added on the surface of cotton fabric, continue 30 seconds, so that bafta pastes mutually with this fastener.For the fastener that does not have viscosity can with someway sample attached on the bafta, normally this fastener is fixed on the underwear of user.

Chuck with 7.6cm (3 inch) is clamped the end of the discontiguous sample of bafta bar on the cupping machine that coexists.When clamped sample, the outermost edge (being free end) that should make this chuck is inwards apart from the about 1.3cm in the end of absorption piece (about 0.5 inch).If the number of absorption piece more than 1, should make these absorption pieces all be clamped by this chuck when clamped sample.Be that sample is counted from the end of these absorption pieces and clamped about 1.27cm.

The free end of bafta bar is put in the chuck of another one 7.6cm.When the free end of cotton sliver is put into this chuck, the free end of this chuck is only contacted with the immediate ora terminalis of sample.Adjust the chuck of stretching test-run a machine, make their proportionately direction stretchings (as doing in the testing machine in front) at 180 ° of angles.So just transmitted and be used for making fastener and bafta bar shearing force separated from one another.

The measurement length of adjusting cupping machine makes the short absorption piece material of its length than absorption piece be clipped to quantity (generally being about 1.27cm) in each chuck.Crosshead speed (per second 0.367 inch) with per second 0.93cm begins to stretch.When sample reaches when measuring length, the ergometer of testing machine is calibrated to zero.Set the trigger point, the data when beginning to be collected in 20 gram forces.

Connecing desired number of times gathers the measurement data of power and percentage elongation and finishes this test.

This absorbing articles is preferably in and can be elongated to about 110%, 115%, 120%, 125%, 130%, 140% etc. of its initial length when suffered power is increased to following numerical value, and what this power reached numerical value is: the power that absorbing articles is subjected to is increased to 1000 grams or the power on the sample of acting on is increased to firm this fastener [by above-mentioned test method (C) (1)] when bafta breaks away from that causes.Second method-50 gram triggering power

The sample that is used for this test is whole absorbing articles, and this test only relates to the measurement of the performance of sample on vertical (promptly being parallel to longitudinal centre line) direction.

This sample is layered on the platform without restrictions, makes medial that side of sample up.If sample has a cohesiveness fastener, should make the width that peels off part of all adhesion cover strips expose about 5cm (about 2 inch) even as big as making sticker at an end of this sample.

(7.6cm of standard is wide, and the trade mark is to get a bafta bar ^#429W is by Test Fabrics, and Inc.of Middlesex, MJ makes), cover on long (being exposed) part of the 2.5cm (1.0 inch) of this fastener material of end of fastener.For the edge that helps to limit most of bonding fasteners can be placed on sample under the uviol lamp, the fastener portion that is covered by cotton goods should be the representative on fastener surface.Only need cotton sliver is placed on the fastener, at this moment do not apply power.

The bafta bar should long enough, so that the elongation of its free end (non-attachment end) exceeds the ora terminalis 1.3cm (0.5 inch) of the sample (the actual ora terminalis that promptly comprise the product of absorbability and nonabsorbable parts) adjacent with the 2.54cm fastener portion that covered by bafta at least, the bafta bar being stretched out exceed the bafta bar of the about 7.6cm of sample ora terminalis (about 3 inch) is enough for many samples.

Measuring and mark apart from the most apneusis receipts edge-of-part that is positioned at that opposite end of sample (will as that end of the attachment end of this sample) is the horizontal line of 1.3cm (0.5 inch).This labelling is clipped in an indication of sample end position as the chuck on cupping machine.

With 17.6 gram/cm ²Pressure equably (weight that covers with foamed materials) be added on the bafta and continue 30 seconds so that bafta is attached on the fastener.For there not being adhesive underwear fastener, usually can be with mode on wearer's underwear that fastener is fixed on sample attached on the bafta.Remove this weight, remove all residual separate papers by the method that is not capped part spraying Pulvis Talci and corn starch to the adhesion fastener.Remove all the adhesion fasteners nubbin on all sticker vestiges.

With not clamping with the chuck of the contacted sample end of bafta bar with a 7.6cm (3 inch) on the testing machine, when clamped sample, the outer most edge (being free end) that should make chuck is inwards apart from the about 1.3cm in the end of absorption piece (about 0.5 inch).If the number of absorption piece is more than 1 in this 1.27cm zone, when clamped sample, these absorption pieces are all clamped by this chuck so.Promptly sample is counted from the end of this (a bit) absorption piece and clamped about 1.27cm.

The free end of bafta bar is put into the chuck of another 7.6cm.The free end of this chuck is only contacted with the immediate ora terminalis of sample.It should be noted that any part of not clamping this end of sample.When adjusting the chuck of cupping machine, should make two chucks become 180 ° of angles to draw back (as described in the test in front).So just finished the transmission that makes fastener and cotton sliver shearing force separated from one another.

Adjust the distance between these chucks of cupping machine, make to surpass distance between chuck at the fabric length on the sample and just make sample some is lax.Therefore, at this moment sample will not be in extended state.

Crosshead speed with per second 0.93cm (0.367 inch) begins to stretch.If sample has an adhesion fastener, stretch so and be used to make sample and the proximate 17.6 gram/cm of bafta bar removing ²Covering foam weight after beginning in 30 seconds.Set the trigger point, beginning collection power and stretching data under 50 gram forces.Crosshead should move to till the bafta bar partly separates (promptly shearing) with the 2.54cm of sample fastener.

Gather power and elongation measurement data by desired number of times, and finish this test.The measurement length that is used to calculate the % percentage elongation be from fixed jaw (clamp by with stick to cotton sliver on the relative sample end of sample end on the end of absorption component count that jaw of inside 1.27cm) to the air line distance of the immediate ora terminalis of this cotton sliver, this moment, this sample bore the tensile forces of 50 grams.

This absorbing articles is preferably in can be elongated to about 110%, 115%, 120%, 125%, 130%, 140% etc. of its initial length when suffered power increases to following numerical value, the numerical value that described power reaches is: the power that this absorbing articles is subjected to is increased to 800 grams or 1000 grams, or the power on the sample of acting on increases firm this fastener [finishing by the condition of above-mentioned test method (C) (2)] when bafta breaks away from that causes.

Test method C will cause that attached to time on the underwear condition of absorbing articles elongation designs in order to simulate absorbing articles.

D. be used to measure regeneration rate with elasticity absorbing articles

The sample that is used for this test is whole absorbing articles.This test also only relates to the measurement of the performance of sample on the direction of vertical (promptly being parallel to longitudinal centre line).

Utilize the maximum longitudinal tensile strain of above test method B measuring samples under 1000 gram force conditions.

Following test is carried out in operation by hand, removes all adhesion cover strips from sample.If sample has the adhesion fastener, by Pulvis Talci or corn starch are sprayed all sticker vestiges of elimination on the adhesion fastener.

A ruler that has scale (minimum calibration is or 1mm) at 0.1 o'clock is placed on the platform.

With a hold end of sample of a hands.That should hold this sample counts about 3.8cm (approximately from the horizontal ora terminalis of this product Inch) a end is arrested sample and is made it become plane and maintenance level as much as possible in the direction across width.

Above ruler or the sample of holding of next door, make the sample body-facing surface up, so that can in entire test, observe the scale on the ruler.Arrest sample, that part of sample of counting inwardly about 1.27cm from this stiff end by sample is consistent with the graduated starting point strictness of ruler entire test all the time.

With one be accurate to 0.01 second can writing time digital stopwatch be placed on ruler and sample next door.Be positioned at this absorbing articles on the platform above a gamma camera is set, to observe this absorbing articles sample, observe and write down elapsed time and record (being accurate to 0.1 second) on the stopwatch simultaneously.

Catch another lateral end edges (being free end) of sample.Should catch near sample about wide zone of 5cm () longitudinal centre line at about 2 o'clock.Should grab that zone of playing inside about 1.3cm () at sample by that ora terminalis grate of the longest absorption piece at about 0.5 o'clock.(this 1.3cm distance should not count among the article end seal or any part of the absorption piece in the outside, as previously discussed).

Start gamma camera and stopwatch, the free end of the sample that stretches lentamente makes this sample be elongated to the maximum elongation amount or reach 120% of its initial length under 1000 gram forces (prior check weighing) effect.No matter maximum elongation length or extend the length of its initial length 120% among have one to be bigger.Stretching process should be finished in time of 30 seconds being less than or equaling.

Unclamp the free end of sample.When free end is decontroled between picking up counting on the stopwatch.

Measuring samples is recovered the needed time of its original length towards its distance that initial length recovered and at desired some points, this is to fall to play by means of videotape picture one width of cloth on video tape recorder with connecing a width of cloth, and the whole contraction process of observation sample is finished.

Can calculate regeneration rate with remove the distance that sample shrinks (convert to centimetre) by needed time of respective distance.So just finished this test.

Sample in test method D also can sandwich in the chuck of cupping machine, and finish test according to similar method, one end of sample is clipped in the fixed chuck, and the other end of sample be clipped in one can be in that chuck of instantaneous this end that unclamps sample of required time.

When bearing pulling force, absorbing articles make described absorbing articles reach (a) (the maximum elongation length under the effect of 1000 gram forces) along its longitudinal centre line direction elongation, or (b) (its initial length 120%), there is one to be bigger among 120% the length of maximum elongation length and initial length, cancel described tensile force, described absorbing articles is if under the condition of maximum elongation length, and then just making it (i) recover length (a) towards it from maximum elongation length (a), (ii) to return to the distance than little its initial length 10% of maximum elongation length last; Or if reach in elongation under 120% the condition of its initial length, then can make absorbing articles be less than or equal to about 20.30 or the regeneration rate of 40cm/ second return to 110% of its initial length.

Though to these specific embodiments of the present invention as explanation and describing, concerning the professional and technical personnel of this area, can make various changes and modifications and can not break away from focus of the present invention and scope, this is conspicuous.

Claims (19)

1. one kind attached in the interior crotch district that is wearing, tensile absorbing articles with crotch district extension in described, described absorbing articles is sanitary towel or pantiliner, it has a longitudinal centre line,, a cross central line, an initial length, a transflective liquid side, a liquid-tight side, and absorption piece that is between described transflective liquid side and the described liquid-tight side, described absorption piece has end margin, wherein: described absorbing articles is in the masterpiece time spent that is subjected to being less than or equal to 1000 grams, can be elongated to more than or equal to 110% of its initial length along described longitudinal centre line, and the elongation of at least a portion is that at least a portion absorbing articles by the longitudinal medial of the end margin that is positioned at this absorption piece provides.

2. absorbing articles as claimed in claim 1 is characterized in that: described absorption piece has the length that is less than or equal to 30.5cm.

3. absorbing articles as claimed in claim 2 is characterized in that: the thickness of described absorbing articles is less than or equal to 5mm.

4. as claim 1 or 3 described absorbing articles, it is characterized in that:, can be elongated to from 115% to 150% of initial length along described longitudinal centre line direction when it is subjected to being less than or equal to the masterpiece time spent of 1000 grams; And will be elongated to above 160% of its initial length, need be more than or equal to the power of 1500 grams.

5. absorbing articles as claimed in claim 2 is characterized in that: when this absorbing articles be elongated to more than or equal to its initial length 150% the time, after cancelling pulling force, can return to and be less than or equal to 150% of its initial length.

6. absorbing articles as claimed in claim 1 is characterized in that: when it is subjected to more than or equal to 20 gram forces, is less than or equal to 1500 gram forces and does the time spent, it can be elongated to its initial length 120% to 170% between a length.

7. absorbing articles as claimed in claim 6 is characterized in that: when it is subjected to more than or equal to 20 gram forces, is less than or equal to 1500 gram forces and does the time spent, it can be elongated to its initial length 120% to 150% between a length.

8. absorbing articles as claimed in claim 6 is characterized in that: when it is subjected to more than or equal to 20 gram forces, is less than or equal to 1500 gram forces and does the time spent, it can be elongated to its initial length 120% to 140% between a length.

9. as claim 1 or 6 described absorbing articles, it is characterized in that: it need just can be elongated to above 160% of its initial length more than or equal to the power of 2000 grams.

10. as claim 1 or 6 described absorbing articles, it is characterized in that: it need just can be elongated to above 150% of its initial length more than or equal to the power of 2000 grams.

11. as claim 1 or 6 described absorbing articles, it is characterized in that: it need just can be elongated to above 140% of its initial length more than or equal to the power of 2000 grams.

12. as claim 1 or 6 described absorbing articles, it is characterized in that: it need just can be elongated to above 130% of its initial length more than or equal to the power of 2000 grams.

13. as claim 1 or 6 described absorbing articles, it is characterized in that: described absorbing articles can have described elongation in its longitudinal centre line direction.

14. as claim 1 or 6 described absorbing articles, it is characterized in that: described absorbing articles can have described elongation in its cross central line direction.

15. absorbing articles as claimed in claim 6 is characterized in that: when this absorbing articles be elongated to more than or equal to its initial length 120% the time, after cancelling pulling force, can return to and be less than or equal to 120% of its initial length.

16. absorbing articles as claimed in claim 1, it is characterized in that: the wide material strips of 2.54cm of the initial length of this absorbing articles that downcuts along the cross-section of the cross central line that is positioned at this absorbing articles, be subjected to being less than or equal to 400 gram forces at it and do the time spent, can be elongated to its initial length 110% and 150% between length.

17. absorbing articles as claimed in claim 16 is characterized in that: the wide material strips of described 2.54cm is done the time spent being subjected to being less than or equal to 400 gram forces, can be elongated to more than or equal to 115% of its initial length.

18. as claim 1,2,3 or 6 described absorbing articles, it is characterized in that: the width of described absorption piece is less than or equal to 7.62cm.

19. absorbing articles as claimed in claim 18 is characterized in that: the width of described absorption piece is less than or equal to 6.35cm.

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