CN100584296C - Absorbent articles having improved performance - Google Patents

Absorbent articles having improved performance Download PDF

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Publication number
CN100584296C
CN100584296C CN01812936A CN01812936A CN100584296C CN 100584296 C CN100584296 C CN 100584296C CN 01812936 A CN01812936 A CN 01812936A CN 01812936 A CN01812936 A CN 01812936A CN 100584296 C CN100584296 C CN 100584296C
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liquid
liquid absorption
absorption parts
absorbing structure
parts
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CN1646073A (en
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P·S·沃恩
L·-S·沃恩
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Kimberly Clark Worldwide Inc
Kimberly Clark Corp
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Kimberly Clark Worldwide Inc
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Abstract

The present invention relates to absorbent articles. Specifically, the present invention relates to a personal care article having improved performance. The present invention is directed to personal care articles, including feminine pads, having a multi-component liquid absorbent structure that provides maximum protection, reduces leakage and generally stays dry to the touch, provides a better fit, and, after an insult, is more aesthetically pleasing because it masks or hides more liquid. The absorbent articles include a multi-component liquid absorbent structure that has a first liquid absorbent component that is a coherent, flexible matrix including stratified layers of fibrous material as well as a second liquid absorbent component.

Description

Has the absorbent item that improves performance
It is that 60/204,643 U.S. Provisional Application is a priority that the application requires with the application number that on May 17th, 2000 proposed.
Technical field
Present invention relates in general to the absorbent item field.More particularly, the present invention relates to have the personal-care supplies that improve performance.The personal-care supplies that the present invention relates to comprise having the feminien hygiene liner that improves performance.
Background technology
, carrying out for example in the manufacture process of personal-care supplies at absorbent item with the improvement on the resistance always.These articles for use have a plurality of parts usually, and the serviceability of some articles for use may mainly be by those component affects that can disperse and/or absorb liquid.Therefore, the method that manufacturers are also seeking to make the liquid handling performance of material therefor in these articles for use to be improved as possible, thus improve the performance of articles for use.
Can make one of method that the performance of these type articles for use is improved is to be extensive use of cellulose villus and/or superabsorbent material.For example, current designer trends at commercial diaper just are to use more superabsorbent material and fiber still less, thereby make diaper become thinner.Yet, although total use the superabsorbent material of volume more can increase diaper absorbent properties, but this diaper in use also can run into the problem of excessive leakage.
Having the reason that the absorbent item of high power capacity superabsorbent material still can leak is that in use some superabsorbent material can not promptly absorb liquid when liquid is applied on the composite absorption articles for use.
The increase of fibrous material has improved the leakage phenomenon of composite absorption articles for use because fibrous material can temporarily be preserved liquid, up to superabsorbent material Liquid Absorption.Fiber can also make the particle separation of superabsorbent material open, thereby has reduced the generation of gel blockage phenomenon.The granule that term used herein " gel blockage " refers to superabsorbent material is out of shape when swelling, has blocked between the particle or the space between particle and the fiber, thereby has stoped liquid flowing in the space.If it is improper that superabsorbent material is selected, particularly when this material can produce the gel blockage phenomenon in compound articles for use,, also can cause absorbent item from start to finish all to have poor liquid retainability energy even then in the composite absorption articles for use, add fibrous material.Therefore selecting for use of special superabsorbent material has very big influence to absorption in the absorbent item use and leaking performance.
The absorbent item that can access on the market, for example another problem of existing of diaper is leakage phenomenon can take place after shoving accepting multiply.Term used herein " shoves " and refers to the once importing of liquid in absorbent article.For example, in use, diaper will be accepted multiply and shove in life cycle.In order to reduce the leakage of diaper in life cycle, wish that absorbent article keeps the absorbent properties of certain level in life cycle.
A problem in addition is, after articles for use are accepted one and shoved, absorbs even liquid has been absorbed articles for use, and the wearer still can feel the humidity of liquid.For blood or urine, if these the liquid continuous and contact skin people then can stimulate human body skin.If absorbent item can not be directed away liquid from the surface that contacts with wearer's skin, even articles for use do not leak, the skin of human body still can be upset.
At last, at some absorbent items, for example in the feminien hygiene liner, employed absorbing material can absorb under the situation of not leaking and shove, still, especially when liquid be women during through liquid, the liquid on whole absorbent item be easy to descried.This is not that client is desired, as already mentioned, if these the liquid continuous and contact skin people then can stimulate human body skin.Yet even do not stimulate phenomenon to take place, the articles for use outward appearance after shoving also is inaesthetic, allows the people feel unpleasant.
A great number of U.S. patents is devoted to solve the variety of issue that exists in the combination articles for use absorbing.For example, the U.S. Patent No. 5,147,343 of authorizing the rich lattice (Kellenberger) of khellin has pointed out to use the importance with the superabsorbent material under height " load absorbs (the AUL) " value in absorbent item.The U.S. Patent No. 5,149,335 of authorizing the rich lattice people such as (Kellenberger) of khellin has been pointed out the importance of super absorbance and absorbability in the composite absorption articles for use.The U.S. Patent No. 5,415,643 of authorizing people such as Melius has been pointed out the importance of AUL value under various pressure.Authorizing people's such as Goldman U.S. Patent No. 5,599,335 has emphasized in conjunction with the superiority with height " the mobile transmission property of salt " and high " pressure ".Authorize people's such as Gustafsson U.S. Patent No. 5,728, described in 082 and had the two-layer absorber that comprises superabsorbent material, wherein the superabsorbent material in the ground floor has the high degree of cross linking, and the superabsorbent material in the second layer has higher absorbability than the superabsorbent material in the ground floor.
Disclosed the property of superabsorbent material in above-mentioned patent, these performances make absorbent article have the improvement performance.Generally speaking, above-mentioned patent has instructed superabsorbent material to have high absorbent capacity under loaded situation, thereby has improved the rigidity of gel and by performance, the performance of compositions has been increased.Yet, above-mentioned patent still can not provide have to greatest extent protection, that do not leak, sensuously keep dry and comfortable absorbent item, for example diaper or feminien hygiene liner are if the feminien hygiene liner also will have better suitability.
Therefore, this just needs a kind of absorbent item that comprise the absorbing structure that has improved, and this structure can provide protection to greatest extent to the wearer.Also need a kind of absorbent item that comprises the absorbing structure that has improved, this structure can keep liquid effectively, no matter whether comprises superabsorbent material simultaneously, also has relatively little size.Also need a kind of absorbent item that comprises the absorbing structure that has improved, this structure can make articles for use keep dry and comfortable.In addition, also need a kind of absorbent item that comprises the absorbing structure that has improved, these articles for use can provide better suitability for the wearer.At last, also need a kind of absorbent item, the outward appearance of articles for use remains attractive in appearance to these articles for use accepting to shove afterwards, allows the people feel pleasure.
Summary of the invention
Above-mentioned various needs can be realized by multi-part liquid absorbing structure of the present invention.This structure comprises:
The first Liquid Absorption parts, it is adherent, as to have multilayered fibrous material layer flexible fiber matrix, these first Liquid Absorption parts have first first type surface, second first type surface, first gross area and first volume, and
The second Liquid Absorption parts, it is the another kind of liquid absorption material layer that is adjacent to second first type surface of the first Liquid Absorption parts, these second Liquid Absorption parts have second gross area and second volume, thereby the ratio of second gross area and first gross area was greater than about 3.5: 1, the ratio of second volume and first volume was greater than about 10: 1, and total volume of liquid absorbing structure is less than about 130cm 3
For example, the ratio of second gross area and first gross area can be preferably about 4: 1 between about 3.5: 1 to about 8: 1.
As another one embodiment, the ratio of second gross area and first gross area can be between about 10: 1 to about 100: 1.In embodiments of the present invention, the second Liquid Absorption parts use the superabsorbent material of relative higher amount, and or relative thin, the ratio of second volume and first volume can preferably can be about 16: 1 between about 10: 1 to about 30: 1.In embodiments of the present invention, the second Liquid Absorption parts use the fine hair paper pulp of relative higher amount, and the ratio of second volume and first volume can be between about 30: 1 to about 100: 1.Among the another one embodiment, the ratio of second volume and first volume can be between about 50: 1 to about 75: 1.In another embodiment, ratio is preferably in about 75: 1.
In one aspect of the invention, the cumulative volume of liquid absorbing structure is less than about 130cm 3The cumulative volume of preferably liquid absorbing structure is less than about 100cm 3, more preferably less than about 50cm 3, further preferably less than about 30cm 3, most preferably less than about 25cm 3
According to the present invention, the first Liquid Absorption parts can have the cellulose fluff wool fibre of multilamellar by air lay length level fiber, air lay, the cellulose fibre of the chemical modification of air lay, the layer that aquagel fibre or their compositions form.In one aspect of the invention, the first Liquid Absorption parts are generally multilamellar, comprise two-layer at least fiber matting net.Preferably, the one deck at least in the fiber matting net is selected from the combination of bonded carded fibrous web, air lay fleece, meltblown fiber web, spunbond fleece, water thorn interlacing fiber net or above-mentioned net.
In one aspect of the invention, the first Liquid Absorption parts also comprise microparticle material.These microparticle materials can be superabsorbent material (materials as hydrogel and so on that just refers to).
In order to make the first Liquid Absorption parts can become adherent fibrous material matrix, can utilize that heat-bondable fibre, binding agent, thermal point bond, machinery are entwined, emulsion agent or their combination carry out bonding.
The second Liquid Absorption parts can be from comprising composite construction, cellulose villus structure, being generally the hydrogel structure that uniform airflow becomes web frame and selecting.
In one aspect of the invention, wish that the space, interval of second first type surface of the first Liquid Absorption parts is configured to make liquid roughly to transmit along the length direction of the first Liquid Absorption parts, and liquid is discharged into the second Liquid Absorption parts.
In another aspect of this invention, after the central authorities to first first type surface of the first Liquid Absorption parts apply shoving about 1 minute of 10ml roughly, the first Liquid Absorption parts keep less than about 30% artificial through liquid.For example, in that to accept roughly 10ml artificial through shoving of liquid after about 1 minute, the first Liquid Absorption parts keep less than about 25% artificial through liquid.Preferably in that to accept roughly 10ml artificial through shoving of liquid after about 1 minute, the first Liquid Absorption parts keep less than about 20% artificial through liquid.Especially preferably in that to accept roughly 10ml artificial through shoving of liquid after about 1 minute, the first Liquid Absorption parts keep less than about 15% artificial through liquid.
In another aspect of this invention, after the central authorities to first first type surface of the first Liquid Absorption parts apply shoving about 10 minutes of 5ml roughly, the first Liquid Absorption parts covered in the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 50%.For example, after the central authorities to first first type surface of the first Liquid Absorption parts apply shoving about 10 minutes of 5ml roughly, the first Liquid Absorption parts covered in the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 70%.In another embodiment, after the central authorities to first first type surface of the first Liquid Absorption parts apply shoving about 10 minutes of 5ml roughly, the first Liquid Absorption parts covered in the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 75% to 100%.In another embodiment, after the central authorities to first first type surface of the first Liquid Absorption parts transmit shoving about 10 minutes of 5ml roughly, the first Liquid Absorption parts covered the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 80% to 100%.
In another aspect of this invention, the first Liquid Absorption parts are being to distribute like this aspect the space, interval: the space, interval at the adjacent second first type surface place is little, and the space, interval at the adjacent first first type surface place is big.For example, the space, interval of interval void ratio adjacency second first type surface of adjacency first first type surface is larger about 1.25 times.The diversity ratio of this size can be between about 1.25: 1 to about 3: 1.Preferably, the diversity ratio of this size can be between about 1.5: 1 to about 2.5: 1.
In another aspect of this invention, the first Liquid Absorption parts are to distribute like this aspect the space, interval: the space, interval at its adjacency second first type surface place is less than the space, interval at the adjacency second first type surface place in the second Liquid Absorption parts.
In another aspect of this invention, the first Liquid Absorption parts are to distribute like this aspect the space, interval: in the first Liquid Absorption parts in abutting connection with the space, interval at the second first type surface place can with the second Liquid Absorption parts in identical or a little more greatly in abutting connection with the space, interval at the second first type surface place.
The present invention also comprises a kind of multi-part liquid absorbing structure, and this structure comprises:
The first Liquid Absorption parts, it is adherent, as to have multilayered fibrous material layer flexible fiber matrix, these first Liquid Absorption parts have first first type surface, second first type surface, first gross area and first liquid absorption capacity, and
The second Liquid Absorption parts comprise the another kind of liquid absorption material of one deck at least of second first type surface that is adjacent to the first Liquid Absorption parts, and these second Liquid Absorption parts have second gross area and second liquid absorption capacity;
Like this, the ratio of second gross area and first gross area was greater than about 3.5: 1, and the ratio of second liquid absorption capacity and first liquid absorption capacity was greater than about 10: 1, and total liquid absorption capacity of this liquid absorbing structure is far longer than about 35 grams.
In general, the liquid absorption capacity of the first Liquid Absorption parts is that about 3 grams are between about 10 grams.Preferably the liquid absorption capacity of the first Liquid Absorption parts is about 6 grams.The liquid absorption capacity of the second Liquid Absorption parts is that about 35 grams are between about 600 grams.For example, the liquid absorption capacity of the second Liquid Absorption parts can be between extremely about 150 grams of about 35 grams.Preferably, the liquid absorption capacity of the second Liquid Absorption parts is about 100 grams.
The ratio of second liquid absorption capacity and first liquid absorption capacity is between about 3.5: 1 to about 200: 1.Preferably, this ratio will be between about 10: 1 to about 30: 1, and more preferably, this ratio is about 16: 1.
The present invention also comprises a kind of personal-care supplies with said structure.This nursing materials can be a sanitary towel.For example, in one embodiment, can there be a longitudinal axis in sanitary towel, and owing to having used multi-component absorbent structure to improve the liquid handling ability, this sanitary towel can comprise:
Liquid can see through towards the health layer;
Liquid cannot see through towards the clothes layer; And
Liquid can see through towards health layer and liquid cannot see through towards the multi-component absorbent structure between the clothes layer, this multi-component absorbent structure comprises:
The first Liquid Absorption parts, wherein at least a portion of these first Liquid Absorption parts is positioned on the longitudinal centre line of sanitary towel, these first Liquid Absorption parts be adherent, have a flexible fiber matrix that is generally the multilayered fibrous material layer, these first Liquid Absorption parts have and are adjacent to first first type surface towards the health layer that liquid can see through, with the first first type surface opposite second major surface, first gross area and first liquid absorption capacity, and
The second Liquid Absorption parts, the another kind of liquid absorption material of one deck at least that comprises second first type surface that is adjacent to the first Liquid Absorption parts, these second Liquid Absorption parts have second gross area and one second liquid absorption capacity, the ratio of second gross area and first gross area was greater than about 3.5: 1, the ratio of second liquid absorption capacity and first liquid absorption capacity is far longer than about 10: 1, and total liquid absorption capacity of this multi-component absorbent structure is greater than about 35 grams.
The correlated performance of foregoing description and ratio also are applicable to the first Liquid Absorption parts and the second Liquid Absorption parts in the multi-component absorbent structure in the sanitary towel.
Can also comprise a recessed road in second absorption piece of sanitary towel, its at least a portion periphery at the first Liquid Absorption parts extends.Preferably, recessed road is around the whole periphery of the first Liquid Absorption parts.Recessed road can roughly be avette or oval-shaped, makes the zone in the recessed road higher relatively than all the other zones.Raising, some zones will become in the sanitary towel and the most approaching zone of human body, and this recessed road helps to provide better suitability.And recessed road can prevent that liquid from leaking out from sanitary towel.
In another embodiment, the present invention includes thin, an effective liquid absorbing structure, this structure comprises:
The first Liquid Absorption parts, its for adherent, have a flexible fiber matrix that is generally the multilayered fibrous material layer, these first Liquid Absorption parts have first first type surface, second first type surface, first gross area, first gross thickness and first volume and first liquid absorption capacity, and
The second Liquid Absorption parts comprise the another kind of liquid absorption material layer of second first type surface that is adjacent to the first Liquid Absorption parts, and these second Liquid Absorption parts have second gross area, second thickness and second volume and second liquid absorption capacity,
Thereby each comfortable about 1mm of the thickness of the first Liquid Absorption parts and the second Liquid Absorption parts is between about 2mm, and the ratio of second liquid absorption capacity and first liquid absorption capacity is greater than about 10; The ratio of second gross area and first gross area was greater than about 3.5: 1, and the ratio of second volume and first volume was greater than 10: 1, and total volume of absorbing structure is less than about 30cm 3, like this after applying the shoving about 1 minute of 10ml roughly, the first Liquid Absorption parts keep less than about 30% artificial through liquid.For example, in that to apply roughly 10ml artificial through shoving of liquid after about 1 minute, the first Liquid Absorption parts keep less than about 25% artificial through liquid.Preferably, in that to apply roughly 10ml artificial through shoving of liquid after about 1 minute, the first Liquid Absorption parts keep less than about 20% artificial through liquid.
The correlated performance of foregoing description and ratio also are applicable to thin, the effective first Liquid Absorption parts and the second Liquid Absorption parts in the absorbing structure in the multi-component absorbent structure.
By below in conjunction with the accompanying drawing detailed description of the present invention, above-mentioned and other characteristics of the present invention will become clearer.
Description of drawings
Figure 1A, 1B and 1C are respectively partial cross sectional views, cutaway view and the top view of the feminien hygiene liner of the expression first embodiment of the present invention.
Fig. 2 A, 2B and 2C are respectively partial cross sectional views, cutaway view and the top view of the feminien hygiene liner of the expression second embodiment of the present invention.
Fig. 3 A, 3B and 3C are respectively partial cross sectional views, cutaway view and the top view of the feminien hygiene liner of the expression third embodiment of the present invention.
Fig. 4 A, 4B and 4C are respectively partial cross sectional views, cutaway view and the top view of the feminien hygiene liner of the expression fourth embodiment of the present invention.
Fig. 5 A, 5B and 5C are respectively partial cross sectional views, cutaway view and the top view of the feminien hygiene liner of the expression fifth embodiment of the present invention.
Fig. 6 A and 6B represent that the feminien hygiene liner in one embodiment of the present of invention is how to suck the goods the inside shoving, and how to make liquid away from the most close wearer's product surface.
Fig. 7 A and 7B represent that the feminien hygiene liner in an alternative embodiment of the invention is how to suck the goods the inside shoving, and how to make liquid away from the most close wearer's product surface.
Fig. 8 represents to measure the top view that absorbing structure absorbs the device of liquid rate.
Fig. 9 represents to measure the cutaway view that absorbing structure absorbs the device of liquid rate.
The specific embodiment
Term used herein " non-woven fabrics or non-woven fabric net " expression has the net of single fiber or monofilament structure, and wherein single fiber or monofilament structure are entwined together mutually with inequality, unrepeatable mode.Non-woven fabrics or net in the past can be with many diverse ways manufacturings, for example melt-blown method, spun-bond process and bonding carding fiber net methods.
Term used herein " granule " or " microgranule " (particle, particles, particulate, particulates etc.) expression is generally the material of separate unit form, for example can be particle, dust, powder or spheroid.Required grain shape for example is cube, bar-shaped, polygon, sphere or hemispherical, circle or semicircle, the irregular shape of dihedral etc.The shape that the greatest dimension/smallest dimension ratio is big is as needle-like, pie with fibrously also can be used among the present invention.Granule with required form can be coated (having gel coating, protein coating of microgranule core, porosu solid core, solid core, semi-solid core, liquid core, semiliquid core, gas core, half gas core or above combination etc.) or not coated (porosu solid, solid, semisolid and analog).It is pointed out that the granule that has more than one at least can be applicable in nonwoven web more of the present invention, they or mixed, perhaps be distributed in the different layers." granule " and " shot-like particle " also can be used for describing the agglomerate of the granule that comprises more than one, shot-like particle etc.
Term used herein " superabsorbent material " and " hydrogel " are commonly referred to as in aqueous solution and soak that every gram absorbing material can absorb at least about 10 these liquid of gram (for example water, saline solution can be the synthetic urine of No.KC399105 product from the available label of PPG factory maybe) after 4 hours, and can keep absorbing the absorbing material of liquid under up to about 0.5 pound/square inch pressure.
Term used herein " spun-bonded fibre net " is meant molten thermoplastic from many thin, be generally in the annular spinning head capillaceous and be extruded into ultimate fibre, and adopt the net of the small diameter fibers formation that for example liquid stretches or other well-known spunbond machinery forms the rapid refinement of the filamentary diameter of extrusion molding subsequently.The production of spun-bonded fibre net is described in people's such as for example APPEL U.S. Pat 4,340,563 to some extent.
The fibroplastic net that term used herein " melt-blown net " expression is made by following method: with the melt-blown thermoplastic material from many thin, be generally the annular die capillaries and be extruded into melt filament, this melt filament is pooled in high-speed gas (for example air) stream, to reduce the diameter of thermoplastic material fiber.Then, meltblown fibers is by the high velocity air carrying and be deposited on the collection surface, forms random dispersion meltblown fibers net.The melt-blown process is well-known, all describes in multiple patent and publication, comprises V.A.wendt, the NRL report 4364 of E.L.Boone and C.D.Fluharty, " production of ultra-fine organic fiber "; KD.Lawrence, the NRL report 5265 of R.T.Lukas and J.A.Young, " forming the modifying device of ultra-fine thermoplastic fibres "; The U.S. Pat 3,849,241 that on November 19th, 1974 was authorized people such as Buntin, these documents at this as a reference.
Term used herein " fiber " refers to a kind of basic solid form, and is normally hemicrystalline, it is characterized in that having high relatively intensity, and has the ratio of very high length and diameter, for example for hundreds of than 1.Exemplary natural fibers is Pilus Caprae seu Ovis, silk, Cotton Gossypii and Fructus Cannabis.Typical semisynthetic fibre comprises staple fibre.Exemplary synthetic fibers comprises polyamide, polyester, polypropylene nitrile and the polyolefin that spinneret is extruded.
Term used herein " air lay " (airlaying, air-laid, air-formed, air-forming etc.) refers to usually and well-known the fubril bundle is entrained in the air-flow and the method for the fibrous nonwoven layer that forms.In typical method, be about 3 to separate and be entrained in the air flow to the fubril bundles of about 9 millimeters (mm) with typical length, be deposited on into subsequently on the mesh screen, this step usually will be by vacuum.The fiber of random deposition is bonded together with for example hot-air or spray adhesive each other.People's such as Laursen U.S. Pat 4,640 for example, in air-laid process is disclosed.
The invention provides a kind of multi-component absorbent structure, it comprises the first Liquid Absorption parts, is generally the flexible fiber matrix of multilayered fibrous material layer, shoves or to be exposed in the liquid in order to accepting in the surface that is positioned at or approaches multi-component absorbent structure.Such structure has following advantage.The first Liquid Absorption parts play a part shoving of this body structure surface is directed to following absorbing material, and this shoves and is absorbed in this absorbing material.Like this, the first Liquid Absorption parts help the absorption rate of shoving.The second, the first Liquid Absorption parts the reverse flow that helps to prevent to shove by after the migration.In this way, multi-component absorbent structure can keep liquid better in this structure, and reduces the probability of knowing clearly and leaking.
In addition and since shove can not be by absorbing structure surface reverse flow again, therefore, it is dry and comfortable that this absorbing structure can keep, and the liquid that shoves of major part can not oppositely be moved to the surface that contacts with the first Liquid Absorption parts and come up.For example, this absorbing structure reduced liquid with end face that wearers skin contacts on reverse flow and return wetly, therefore prevented the wearers skin irriate and inflammation.
And the corresponding ratio of the population structure of multi-component absorbent structure, the volume of each component and/or surface area provides the articles for use that possess higher performance and better suitability for the wearer.For example, the ratio of having found the area of the area of the second Liquid Absorption parts and the first Liquid Absorption parts is preferably greater than about 3.5: 1, the ratio of the volume of the volume of the second Liquid Absorption parts and the first Liquid Absorption parts is preferably greater than about 10: 1, particularly works as the cumulative volume of liquid absorbing structure less than about 130cm 3The time, preferably, the cumulative volume of liquid absorbing structure is less than about 100cm 3, more preferably, less than about 50cm 3, further preferably less than about 30cm 3, most preferably less than about 25cm 3
At last,, and be not present in the surperficial local of the contiguous first Liquid Absorption parts,, shove and visually all covered therefore except product surface has speckle because the major part of shoving attracted in the second Liquid Absorption parts.Therefore, the outward appearance of this absorbent item after acceptance is shoved is still attractive in appearance, and the people is felt pleasure.
For example, have found that when absorption piece adopts aforesaid ratio, after applying the shoving about 1 minute of 10ml roughly, the first Liquid Absorption parts keep less than about 30% artificial through liquid.Hope after applying the shoving about 1 minute of 10ml roughly, the first Liquid Absorption parts keep less than about 25% artificial through liquid, less than about 20% artificial through liquid, even less than about 15% artificial through liquid.
Covering up or covering about stain, have found that when absorption piece adopts aforesaid ratio, to the first Liquid Absorption parts the central authorities of first first type surface apply shoving about 10 minutes of 5ml roughly after, the first Liquid Absorption parts preferably covered in the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 50%.After the central authorities to first first type surface of the first Liquid Absorption parts apply shoving about 10 minutes of 5ml roughly, the first Liquid Absorption parts covered in the second Liquid Absorption parts by the artificial contaminated area that produces through liquid at least about 70%, be preferably between about 75% to about 100%.
The invention provides have to greatest extent protection, that do not leak, sensuously keep the absorbent item of for example sanitary towel dry and comfortable, that have better suitability etc.; compared with former articles for use; these articles for use are after accepting to shove, and that the outward appearance of these articles for use remains is attractive in appearance, allow the people feel joyful.Absorbent item has used improved absorbing structure, thereby has above-mentioned improvement performance.In addition, present invention resides on the interior section of absorbent article around the recessed road that is provided with, this groove also extends at periphery.Recessed road makes absorbent item can produce median rise, thereby the goods that the wearer had better suitability are provided.
Absorbing structure of the present invention comprises the first Liquid Absorption parts, and it is adherent, has the flexible fiber matrix that is generally the multilayered fibrous material layer.The first Liquid Absorption parts can be realized several purposes.During beginning, first first type surface of the first Liquid Absorption parts plays a part " surge " or fast Absorption layer, so that fast Absorption liquid.Next, the pantostrat of the first Liquid Absorption parts play a part from neighbouring surface in the first Liquid Absorption parts and/or below layer wicking or fluid transfer.In operating process, liquid is sent to the second Liquid Absorption parts or " absorbent cores " from the first Liquid Absorption parts, and liquid is stored by following absorbing material at this.In addition,, only show as the stain form of for example having only very little circle usually in the overlooking of absorbent item, therefore give a kind of clean sensation of wearer because liquid promptly has been attracted to the inside of multi-component absorbent structure.At last, because liquid is stored in second absorption piece of absorbing structure inside, the surface of absorbent item is dry and comfortable on sense of touch usually, and fewer liquid can contact the surface of this structure, thereby helps avoid the wearer's skin irriate and inflammation.
The multi-component absorbent structure that the present invention uses comprises the first Liquid Absorption parts, these first Liquid Absorption parts be adherent, have a flexible fiber matrix that is generally the multilayered fibrous material layer.Multi-component absorbent structure also comprises the second Liquid Absorption parts, and it can be more conventional absorbing material, and for example the cotton-wool of cellulose fluff wool fibre comprises the fibre board of superabsorbent material or above-mentioned combination.
Adherent, as to have multilayered fibrous material layer flexible fiber matrix has corresponding open tier on the top layer or first first type surface.Open tier plays a part surge layer.In addition, in a single day liquid be absorbed structures capture and absorption, and the open tier of end face helps to prevent the liquid reverse flow, thereby possesses dry and comfortable sensation, help preventing leaking, and reduced because the liquid reverse flow produces the possibility that stimulates with contacting with the articles for use wearer.
In addition, flexible fiber matrix adherent, that have the multilayered fibrous material layer preferably has a wicking layer, this wicking layer can help liquid to enter the inside of the first Liquid Absorption parts by each layer from the evolution layer, enter into absorbent item at last, thereby the major part of liquid is absorbed and is stored in the second Liquid Absorption parts.
Though the inventor there is no need to stick to particular theory of operation, can expect that the first Liquid Absorption parts provide such space, interval distributed dimension, the space is little at interval at the adjacent second first type surface place, and big in the space, interval at the adjacent first first type surface place.The difference of this interval void size can provide a kind of gradient or distribute gradient, helps liquid is wicked into second first type surface from first first type surface.In one embodiment, the space, interval at the void ratio adjacency second first type surface place, interval at the adjacency first first type surface place is larger about 1.25 times.The diversity ratio of this size can be between about 1.25: 1 to about 3: 1.
In one aspect of the invention, space, the available interval of the first Liquid Absorption parts is distributed as, and is little in the space, interval in abutting connection with the adjacency second first type surface place of the interval void ratio second Liquid Absorption parts at the second first type surface place.This structure is believed to make liquid to slow down to the transmission of the second Liquid Absorption parts from the first Liquid Absorption parts.Though the inventor there is no need to stick to particular theory of operation, can imagine in two kinds of parts that the size difference in space makes at interval to be come by diffusion at second first type surface that before the transmission of the second Liquid Absorption parts, has more liquid at the first Liquid Absorption parts.When the superabsorbent material that comprises when the second Liquid Absorption parts had relatively low absorption rate, this operation was considered to useful.
On the other hand, the space, interval that the first Liquid Absorption parts can be configured to provide such distributes, and is promptly identical or a little bit smaller a little with the interval void size at the adjacency second first type surface place in the second Liquid Absorption parts in the interval void size in abutting connection with the second first type surface place.This structure is believed to make liquid to slow down to the transmission of the second Liquid Absorption parts from the first Liquid Absorption parts.Though the inventor there is no need to stick to particular theory of operation, the size difference that can imagine the space, interval of two kinds of parts make liquid can be more directly, more promptly transmit to the second Liquid Absorption parts.More before liquid absorbs in second first type surface diffusion of the first Liquid Absorption parts.When the material that comprises when the second Liquid Absorption parts had higher relatively absorption rate, this operation was considered to useful.
When this liquid absorbing structure was applied to absorbent item such as sanitary towel, a part of expecting the first Liquid Absorption parts at least was positioned in the middle section of close wearer's absorbent article (for example, centrage) along the longitudinal.In this configuration, the first Liquid Absorption parts play a part to make the goods central uplift, thereby provide the articles for use with better suitability to the wearer.If the internal structure (internal structure comprises the first Liquid Absorption parts) at articles for use is provided with recessed road on every side, this better suitability is strengthened.Recessed road can reduce the bulkiness in the zone that goods least often use, the further central uplift of reinforced article, and therefore returning the wearer provides the articles for use with better suitability.Groove also helps to prevent the leak of liquid that absorbs in the absorbent item.
Following accompanying drawing has been introduced several respective embodiments of typical absorbent item among the present invention.These typical embodiment are sanitary towel or the feminien hygiene liner that has used above-mentioned absorbing structure.Certainly, be appreciated that multiple absorbent item can successfully use this liquid absorbing structure.
With reference to Fig. 1 a-c, there is shown the large size feminien hygiene liner with higher absorption ability or the sanitary towel 110 that comprise flap.In Fig. 1 a, 1b, feminien hygiene liner 110 comprises cover layer or top flat 112, and this cover layer or top flat can be thin film, non-woven material or combinations thereof.This feminien hygiene liner can also comprise ventilated polymeric or plastic film baffle or egative film 114, and this egative film can be constructed with from the extended flap of the middle section of liner.This feminien hygiene liner further comprises liquid absorbing structure 115, and this structure comprises the second Liquid Absorption parts 116 and is the first Liquid Absorption parts 118 adherent, flexible fiber matrix with multilayered fibrous material layer.The first Liquid Absorption parts 118 are below cover film 112 and on the second Liquid Absorption parts 116.As has been described previously, the first Liquid Absorption parts 118 be used for making liquid from top flat 112 by, enter the second Liquid Absorption parts 116 that are absorbed and store through the first Liquid Absorption parts 118.
Feminien hygiene liner 110 can also comprise some other structure, the adhesive material 120 mutually bonding that for example this liner is fixed in its position with clothes, cover the release liner 122 of adhesive material 120, below liquid absorbing structure 115 to help the thin layer tissue layer 124 that absorbs liquid be arranged in that the second Liquid Absorption parts 116 have selective migration and the even emboss 126 of fluid storage in desired location.In certain embodiments, thin layer tissue layer 124 also can be between the first Liquid Absorption parts 118 and the second Liquid Absorption parts 116.
Feminien hygiene liner 110 can also be included in recessed road 128 its inner setting, that center on the first Liquid Absorption parts 118.As mentioned above, recessed road 128 helps to make feminien hygiene liner 110 ratios absorbent item conventionally to cooperate with health better.Recessed road also can be arranged in the second Liquid Absorption parts, and extends in the marginal portion of the first Liquid Absorption parts at least.
Fig. 2 a-c shows typical thin type feminien hygiene liner or sanitary towel 210, and it has " thin type " or " slim type " structure, and also has flap.Feminien hygiene liner 210 comprises cover layer 212, and it can be thin film, non-woven material or combinations thereof.This feminien hygiene liner can also comprise breathable polymer or plastic film baffle or egative film 214, and this egative film can be constructed with from the extended flap of the middle section of liner.
This feminien hygiene liner further comprises liquid absorbing structure 215, and this structure comprises the second Liquid Absorption parts 216 and the first Liquid Absorption parts 218, and these first Liquid Absorption parts are flexible fiber matrix adherent, that have the multilayered fibrous material layer.The first Liquid Absorption parts 218 are below cover film 212 and on the second Liquid Absorption parts 216.As has been described previously, the first Liquid Absorption parts 218 help to make liquid from top flat 212 by, enter the second Liquid Absorption parts 216 that are absorbed and store through the first Liquid Absorption parts 218.
Feminien hygiene liner 210 can also comprise some other structure, for example this liner is fixed on the adhesive material 220 bonding of fixed position with clothes, cover the release liner 222 of adhesive material 220, below liquid absorbing structure 215, help to absorb the thin layer tissue layer 224 of liquid and in the second Liquid Absorption parts 216, have selective migration and the even emboss 226 of fluid storage in desired location.In certain embodiments, thin layer tissue layer 224 also can be between the first Liquid Absorption parts 218 and the second Liquid Absorption parts 216.
Feminien hygiene liner 210 can also be included in recessed road 228 its inner setting, that center on the first Liquid Absorption parts 218.As mentioned above, recessed road 228 makes feminien hygiene liner 210 can cooperate with health better than conventional absorbent item.Recessed road also can be arranged in the second Liquid Absorption parts, and extends in the marginal portion of the first Liquid Absorption parts at least.
Fig. 3 a-c shows typical thin type feminien hygiene liner or sanitary towel 310, and it has " ultrathin type " structure, and also has flap.Feminien hygiene liner 310 comprises cover layer 312, and this cover layer can be thin film, non-woven material or combinations thereof.This feminien hygiene liner can also comprise breathable polymer or plastic film baffle or egative film 314, and this egative film can be constructed with from the extended flap of the middle section of liner.
This feminien hygiene liner further comprises liquid absorbing structure 315, this liquid absorbing structure comprises the second Liquid Absorption parts 330 and the first Liquid Absorption parts 318, and these first Liquid Absorption parts are flexible fiber matrix adherent, that have the multilayered fibrous material layer.The first Liquid Absorption parts 318 are below cover layer 312 and on the second Liquid Absorption parts 330.
In this embodiment, the second Liquid Absorption parts 330 can be the thin layers that comprises superabsorbent material.The second Liquid Absorption parts 330 can be by skim tissue layer parcel, surround or being clipped in the middle of the thin layer tissue layer as sandwich style.In this extra-thin structure, can consider to replace the second Liquid Absorption parts 330 by a sheet of material as the first Liquid Absorption parts 318.
Feminien hygiene liner 310 shown in Fig. 3 a-c can also comprise adhesive material 320 and release liner 322.At last, feminien hygiene liner 310 can also be included in its inner recessed road 328 that is provided with.Recessed road also can be arranged in the second Liquid Absorption parts, and extends in the marginal portion of the first Liquid Absorption parts at least.
Accompanying drawing 4a-c shows typical " large size " feminien hygiene liner or the sanitary towel 410 that does not comprise flap.Feminien hygiene liner 410 comprises cover layer or top flat 412, and it can be thin film, non-woven material or combinations thereof.This feminien hygiene liner can also comprise breathable polymer or plastic film baffle or egative film 414.This feminien hygiene liner further comprises liquid absorbing structure 415, this liquid absorbing structure comprises the second Liquid Absorption parts 416 and the first Liquid Absorption parts 418, and these first Liquid Absorption parts are flexible fiber matrix adherent, that have the multilayered fibrous material layer.The first Liquid Absorption parts 418 are below cover film 412 and on the second Liquid Absorption parts 416.
Feminien hygiene liner 410 can also comprise adhesive material 420, is used to cover the release liner 422 of adhesive material 420, thin layer tissue layer 424, embossing 426 and around the sealing 432 of the periphery of feminien hygiene liner 410.At last, feminien hygiene liner 410 can also be included in its inner recessed road 428 that is provided with.Shown in Fig. 4 b, recessed road 428 does not have all sealings to comprise the Zone Full of the feminien hygiene liner 410 of the first Liquid Absorption parts 418.Recessed road can be arranged in the second Liquid Absorption parts and extend in the marginal portion of the first Liquid Absorption parts at least.
Fig. 5 a-c shows " slim " feminien hygiene liner or the sanitary towel 510 that does not comprise flap.Feminien hygiene liner 510 comprises cover layer or top flat 512, and it can be thin film, non-woven material or combinations thereof.This feminien hygiene liner can also comprise breathable polymer or plastic film baffle or egative film 514.This feminien hygiene liner further comprises liquid absorbing structure 515, this liquid absorbing structure comprises the second Liquid Absorption parts 516 and the first Liquid Absorption parts 518, and these first Liquid Absorption parts are flexible fiber matrix adherent, that have the multilayered fibrous material layer.The first Liquid Absorption parts 518 are below cover film 512 and on the second Liquid Absorption parts 516.
Feminien hygiene liner 510 can also comprise adhesive material 520, covers the release liner 522 of adhesive material 520, thin layer tissue layer 524, embossing 526 and in the sealing 532 of the periphery of feminien hygiene liner 510.At last, feminien hygiene liner 510 can also be included in its inner recessed road 528 that is provided with., can see in Fig. 5 b that recessed road 528 does not have all sealings to comprise the Zone Full of the feminien hygiene liner 510 of the first Liquid Absorption parts 518.Recessed road also can be arranged in the second Liquid Absorption parts and extend in the marginal portion of the first Liquid Absorption parts at least.
Referring now to Fig. 6 a-b, 7a-b, from two following different types of feminien hygiene liners as can be seen, the superiority that comprises the absorbent article of the first Liquid Absorption parts and the second Liquid Absorption parts, wherein the first Liquid Absorption parts are flexible fiber matrix adherent, that have the multilayered fibrous material layer.
Shown in Fig. 6 a, feminien hygiene liner or sanitary towel 610 comprise non-woven material cover layer 612 and plastic film baffle 614.This feminien hygiene liner comprises liquid absorbing structure 615, and this liquid absorbing structure comprises the second Liquid Absorption parts, 616, the first Liquid Absorption parts 618 and for example is surface layer under the optional absorbing material of thin layer tissue layer 617.The first Liquid Absorption parts 618 have the first first type surface 618a and the second first type surface 618b for adherent, as to have multilayered fibrous material layer flexible fiber matrix.Feminien hygiene liner 610 can also comprise adhesive material 620, release liner 622, recessed road 628 and sealing 632.
As shown by arrows, in this embodiment, liquid shoves and promptly is applied on the feminien hygiene liner 610 through liquid 634.Pass cover layer 612 through liquid 634, contact with the first first type surface 618a of the first Liquid Absorption parts 618.The relative open or porous layer adjacent with the first first type surface 618a of the first Liquid Absorption parts 618 is as allowing fast Absorption liquid surge layer.The migration of the wall of the first Liquid Absorption parts 618 is through liquid 634, makes it pass the first Liquid Absorption parts 618 and enters the second Liquid Absorption parts 616 and optionally down in the surface layer 617.
Shown in Fig. 6 b, through liquid 634 by the second Liquid Absorption parts 616 and below layer 617 absorb, but usually no longer by the first Liquid Absorption parts 618 and reverse flow.If overlook this sanitary pads from above, have only very little a part of 612a to show in the sanitary pads 610 and once be exposed in liquid 634, thereby make this liner 610 seem more comfortable.In addition, because no longer reverse flow is by the first Liquid Absorption parts 618 through liquid, so cover layer 612 feels dry and comfortable, makes through liquid 634 Min.s ground to contact with human body skin, thereby reduced skin is upset and the probability of inflammation.
Fig. 7 a-b and Fig. 6 a-b are similar, have just replaced the non-woven material cover layer with thin-film covering layer 712.Feminien hygiene liner or sanitary towel 710 comprise plastic film baffle 714.This feminien hygiene liner comprises liquid absorbing structure 715, and this liquid absorbing structure comprises the second Liquid Absorption parts 716, the first Liquid Absorption parts 718 and for example is the optional surface layer down of thin layer tissue layer 717.The first Liquid Absorption parts 718 have the first first type surface 718a and the second first type surface 718b for adherent, as to have multilayered fibrous material layer flexible fiber matrix.Feminien hygiene liner 710 can also comprise bonding agent 720, release liner 722, recessed road 728 and seal 732.
Equally, when being applied on the feminien hygiene liner 710 through liquid 734,, contact by cover layer 712 through liquid 734, and enter in the second Liquid Absorption parts 716 and the optional surface layer 717 down by the first Liquid Absorption parts 718 then with the first Liquid Absorption parts 718.
Can select the various layers that the first Liquid Absorption parts have according to the estimated performance that absorbent item has.As mentioned above, the first Liquid Absorption parts preferably can have open top layer and as surge layer, and after in a single day liquid be absorbed the goods migration and absorb, just can prevent the liquid reverse flow.In addition, the first Liquid Absorption parts preferably contain transmission or wicking layer.
Multiple different types of flexible fiber matrix adherent, that comprise the multilayered fibrous material layer can be used as the first Liquid Absorption parts.Suitable in the present invention material comprises the Technologies from Buckeye, and (Memphis, several multi-functional airs that TENNESSEE) obtain become net materials to Inc.Wherein a kind of above-mentioned material comprises the Web materials of multilamellar air lay, it is included in online polyester (PET) fiber that forms of bearing fabric, the cellulose fibre of remollescent cellulose fiber peacekeeping chemical modification uses the compositions of two adhering components fibers of PET/ polyethylene and alkyl vinyl hydrin rubber emulsion bonding then.
Adopt binding agent can help to provide mechanical integrity and stability.Binding agent comprises that fiber, liquid or other have thermoactive adhesive article.Adhesive fiber preferably includes those fiber with specific fusing point, for example polyolefin.Have corresponding low-melting polymer fiber, for example conjugate fibre and two element fiber are preferred.Polymer fiber with relatively low fusing point is commonly referred to as " can fuse fiber ".Refer to those glass transition temperatures at this " low-melting polymer " and be lower than about 175 ℃ polymer.Be appreciated that the glass transition temperature by selective polymer can make the structure that absorbs fabric web have from softness to inflexible modification.Typical adhesive fiber comprises conjugated polyolefin, polyamide and polyester fiber.Typical adhesive fiber comprises can be from Kosa Inc. (Charklotte, North Carolina) label that obtains is that T-225 (Merge 34821A), T-256 or label are the conjugated fiber of core-skin of copolyester, although those skilled in the art knows multiple suitable bonding fiber, and these fibers can obtain from many manufacturers, for example Chisso and Fibervisions LLC of Wilmington, the suitable copolyester binder fibers of the application skin-core structure that DE.Kosa develops, label are T254 (low melting point CoPET).The fluid adhesive fiber that is fit to is can be from Wilmington, and the Hercules Co. of DE. obtains
Figure C0181293600211
557LX.Other suitable fluid adhesive fiber comprises the commerce of being sold by National Starchand Chemical company (Bridgewater, New Jersey) DUR-O-by name
Figure C0181293600212
Series (comprises 33 Hes 22) the vinyl acetate rubbery copolymer under.By being called that Air Products Polymers And Chemicals sells
Figure C0181293600215
Other suitable fluid adhesive fiber.
Synthetic fibers comprise those by polyamide, polyester, staple fibre, acrylonitrile, superabsorbers,
Figure C0181293600216
Regenerated celulose fibre and other suitable synthetic fibers well known in the art.Synthetic fibers also can comprise the catabolite of Kota Baharu formula.
Many polyolefin can be used as fiber product, and polyethylene for example is as Dow Chemical ' s
Figure C0181293600217
The 6811A low density polyethylene (LDPE), 2553LLDPE, 25355,12350 high density polyethylene (HDPE)s all are suitable polymers.Polyethylene has the melt flow rate (MFR) of corresponding as 26,40,25,12.The producd fibers polypropylene comprises Exxon Chemical Company's
Figure C0181293600218
The PF304 of 3445 polypropylene and Montell Chemical Co.Also can adopt many other polyolefin, the particularly preferred material that is suitable for the application comprises polyester fiber, and Denier range has multiple different cross section between the 3-25 danier, comprises that circle, pentagon, helical coil are curved or the like.Above-mentioned fiber is by Kosa, and Inc. improves, perfect moisture-proof, and the danier number of the kind of polymer and cross section, fiber is record to some extent all.Example comprises every T-224 of 8 daniers (high porosity); Every of 8 danier (trilobal); Every T-224 of 15 daniers (circle); Every T-224 of 10 daniers (circle) and every T-224 of 3 daniers (circle).
Natural fiber comprises Pilus Caprae seu Ovis, Cotton Gossypii, Caulis et Folium Lini, Fructus Cannabis and wood pulp.Wood pulp comprise standard softwood slurry grade as CR-1654 (US Alliance Pulp Mills, Coosa, Alabama).Wood pulp can be modified, in order to the inwardness and the processing characteristics thereof of reinforcing fibre itself.Can will make fiber crimp by the method that comprises chemical treatment or machine crimp.Curl and before crosslinked or sclerosis, carry out typically.Use following cross-linking agent and make the wood pulp sclerosis, such as formaldehyde and derivant thereof, glutaraldehyde, chloropropylene oxide, the derivant that methylolated (Methylolated) chemical compound is for example urinated or urinated, dialdehyde (dialdehydes), maleic anhydride (maleic anhydride), non-methylolated urine derivant (non-methylolated ureaderivatives), citric acid or polybasic carboxylic acid.For environment and healthy factor, these cross-linking agent some kind wherein is just not as other kinds in above-mentioned.Wood pulp also can or for example corrode mercerization by heat to be handled and makes the wood pulp sclerosis.The example of the fiber of these kinds comprises NHB416, and it is can be from Tacoma, and the fiber that the Weyerhaeuser Corporation of WA. obtains, this fiber are the southern softwood pulp fibres through chemical crosslinking, and it has the wet modulus of reinforcement.Other useful fiber is the wood pulp that comes unstuck (NF405) that obtains from Weyerhaeuser and without the wood pulp that comes unstuck (NB416).From BuckeyeTechnologies, Inc of Memphis, the HPZ3 that TN obtains are the fibers that curls after the process chemical treatment, and make this fiber have dried wet rigidity and elasticity.Another kind of suitable wood pulp is a Buckeye HPF2 fiber, also has another kind of IP for obtaining from International Paper Corporation Suitable cellulose fibre is the fiber with Merge18453 of 1.5 daniers, can be from TENCELIncorporated Axis, and Alabama obtains.
As embodiment more specifically, the material that typically is suitable for doing the first Liquid Absorption parts can be from Buckeye Technologies, and Inc. obtains, and commercial disignation is Buckeye Unicore 8001.The total basic weight of air-flow multilayer material that be shaped or air lay can restrain to about 300 (being preferably about 210-240) about 120/scope of square metre (gsm) in, total density range is the about 0.10 gram/cubic centimetre (g/cm of about 0.06- 3).Typical multilayer material comprises that having basic weight is about 25 to about 45gsm the top layer or the superiors, this upper strata comprises from the about 6 polyester binding fibers to about 15 daniers every (dpf), and this layer preferably account for multilayer material in the first Liquid Absorption parts total basic weight 20%.The basic weight of one deck of connecing of next-door neighbour can be in about scope of 35 to about 70gsm, and can comprise the adherent cellulose fibre of usefulness adhesive fiber.This cellulose fibre is handled through mercerising, by using two parts polyester/polyethylene binder fibre heat bondings together.This layer basic weight preferably accounts for 30% of the total basic weight of all layers.It is about one deck of 35 to about 100gsm that multilayer material may further include basic weight, and this layer can comprise the cellulose fibre of compression, and use therein binder fibre is identical with adjoining course or similar kind.This layer can account for 40% of the total basic weight of all layers.It is to support on about 10 to about 20gsm the bearing fabric layer or by it that these layers can be formed on basic weight, and wherein the basic weight of bearing bed preferably accounts for 5% of the total basic weight of all layers.
That other is suitable for, adherent and comprise that it is record to some extent in the patent of WO00/74620 at international publication number that the flexible fiber matrix of multi-layer fiber layer, this matrix are suitable for doing the first Liquid Absorption examples of members.According to the disclosure thing, what term " multilamellar " (" strata ", " stratum ") referred to is exactly to form integrally-built layer-shaped area.Multilamellar in the overall structure is not the multiple structure that layer is assembled, compression forms with molding in advance.On the contrary, overall structure is to be formed by layer deposition in a continuous manner, can deposit with air-laid process and form integrally-built multilamellar.
That other is suitable for, adherent and comprise that the another one example that the flexible fibre matrix of multi-layer fiber layer, this matrix are suitable for doing the first Liquid Absorption parts can comprise two-layer.Wherein ground floor is an air-laid structures, and basic weight is about 50gsm, comprises that weight accounts for the polyester fiber of every of 85% 15 danier, and this fiber is bonded together with the rubber adhesive of the routine of about 15% weight, and this binding agent is applicable to the personal care product.The second layer is an air-laid structures, basic weight is about 150gsm, comprise cellulose fibre fine hair that accounts for 90% weight and the two adhering components fibers that account for 10% weight, this pair adhering components fiber is a skin-core structure, core is a polyester, and skin is polyethylene and quasi-polyethylene, when heating in order to make the rubber adhesive drying, and making binder fibre have heat when active, skin can soften or melt.This special combination layer has and is about 1.6 millimeters gross thickness.
The following examples are used for further setting forth the present invention, but following embodiment is not construed as limiting scope of the present invention.On the contrary; can know and be understood that; under the situation of the protection domain that does not break away from the appended claim in essence of the present invention and/or back, be conspicuous to those skilled in the art by reading other specific embodiment, various improvement and other technical scheme that is equal to that draw after this description.
Specific embodiment
Embodiment 1
In embodiment 1, measure the feminien hygiene liner, the effectiveness of comparing with more conventional commercial feminine liner with the sanitary towel that determines to use the multi-part liquid absorbing structure.In this embodiment, the sanitary towel with multi-part liquid absorbing structure is identified as GEMII.The liner that same multi-part liquid absorbing structure is used for large size and slim type simultaneously uses.
" large size " of all GEMII and " slim type " liner all comprise the multi-part liquid absorbing structure, and in this structure, the first Liquid Absorption parts have about 38 square centimeters area, and the second Liquid Absorption parts have about 131 square centimeters area.
The first Liquid Absorption parts have the thickness of about 1.5 millimeters (0.15 centimetres), thereby produce about 6cm 3Volume calculated." large size " liner of GEMII has used the second Liquid Absorption parts that formed by cellulose villus.These parts have the thickness of about 8 millimeters (0.8 centimetres), thereby produce about 105cm 3Volume calculated." slim type " liner of GEMII has used the second Liquid Absorption parts that formed by cellulose villus.These parts have the thickness of about 6 millimeters (0.6 centimetres), thereby produce about 79cm 3Volume calculated.
The first Liquid Absorption parts are for obtaining from Buckeye Technologies, and commercial disignation is a kind of material of Unicore 8001.This material has the basic weight of about 230gsm, has the liquid absorption capacity of about 6 grams of every gram material.For the liner of " large size " type, the second Liquid Absorption parts are that basic weight is the bat of the wood pulp fluff of about 662gsm, have the liquid absorption capacity of about 10 grams of every gram material.For the liner of " slim type " type, the second Liquid Absorption parts are that basic weight is the wood pulp fluff bat of about 397gsm, have the liquid absorption capacity of about 10 grams of every gram material.
The control commercial feminine liner can be the Laurierbrand Soft Care liner of " large size " and " slim type " two types.These liners can obtain from Malay Kao Corporation.In general, this liner can comprise the single liquid absorption piece, and this single liquid absorption piece can be the cellulose villus core by thin layer tissue layer parcel.These Liquid Absorption parts basic weight for " large size " product is about 519gsm, and basic weight is about 323gsm for " slim type " product.These Liquid Absorption parts are between the egative film of porous membrane cover layer and impermeable liquid.
Table 1 has shown each result of the test of physical measurement and six kinds of liners.Each liner of six kinds of liners is to test with following process of the test that it is absorbefacient, is about to 10cm 3The liquid of (~10ml) joins the liner of each large size and with 6cm 3The liquid of (~6ml) joins in the liner of each slim type.Above-mentioned test is to use U.S. Patent No. 5,833, and the artificial of record implemented through liquid in 231, and the content of this patent at this as a reference.To be described in detail through liquid artificial below.
The test instrunment that this test is used comprises: 1) Platform; 2) smooth horizontal checkout surface.Fig. 8 is this The plan view of platform.Fig. 9 is
Figure C0181293600243
The viewgraph of cross-section of platform.Platform 1200 has the extended pedestal 1202 from the bottom of platform.Pedestal 1202 has a flat surface 1204, and its length is about 2.875 inches, and width is 1.5 inches, thereby forms the bottom of platform 1200.A microscler/oval-shaped perforate 1206 (about 1.5 inches long, about 0.25 inch wide) is positioned at the central authorities of platform, extends to the pedestal 1202 of platform from the top of platform.When the bottom of perforate 1206 is blocked when clogging, whole hole 1206 can hold 10cm 3Liquid.Labelling indicating liquid volume on the passage 1210 is approximately 2cm 3Funnel 1208 on the table top embeds in the passage 1210, and this passage 1210 communicates with oval-shaped hole 1206.Liquid is poured into from funnel 1208, enters oval-shaped perforate 1206 through passage 1210, and flow on the specimen below the platform.
Test each sample, sample is placed on the smooth horizontal checkout surface, then the pedestal of the evagination of platform is put into above the sample, the long axis direction of oval-shaped like this perforate is parallel with the length direction of sample, and oval-shaped perforate is in the end limit of sample and the centre of side.The weight of platform is adjusted into about 162 grams, so the pressure of platform action on sample structure is approximately 7 gram/square centimeters (approximately 1psi).Stopwatch with liquid from Repipet (product serial number No.13-687-20; Fischer Scientific Company) pick up counting when pouring in the funnel, the pressure during pouring liquid is certain value, and liquid is approximately 10cm for the large size product 3, for slim type and super thin product, liquid is approximately 6cm 3Liquid joins in the oval aperture of platform, when liquid meniscus reaches 2cm 3Scale the time indicate 8cm 3Liquid be absorbed, stop manual time-keeping.
In addition, adopt blotting paper to return wet test and measure the artificial gram number that under the pressure that evenly applies 1 pound/square inch (psi), from sample, squeezes out through liquid.With weighing in advance of blotting paper for example is that 100 pounds (lb) are put into above the sample.The commodity of this blotting paper are called " Verigood ", can be from Atlanta, and GA has the Fort James (Georgia Pacific) of office to obtain; Perhaps adopt the 100# blotting paper, commodity are called " Riegel ", can be from Roswell, and Ga has the Sloan Paper Co. of office to obtain; Or adopt other equivalents.Liner is evenly applied the pressure 3 minutes of 1psi.Pressure is removed, wet blotting paper is weighed, degree of accuracy is 0.01 gram.Being absorbed into artificial numerical value through liquid in the blotting paper from sample can deduct the weight that blotting paper does by the wet weight of blotting paper and determine.
Till leaking, determine liquid absorption capacity by liquid dyes solution being joined in the sample.The amount of fluid of distributing when will leak is a liquid absorption capacity.This device comprises wriggling tubular type drug delivery pump system, and (tubing pump, pipeline and wicking sleeve pipe delivery needle) starts and close the switch board of pumping system simultaneously, timer and a flat level pointer-type induction grid, and this grid is used for the existence of induced liquid.Pump is carried liquid, wet through up to sample, and liquid is fallen on the induction grid from sample drop.When this happens, switch board stops pump and timer, and the volume (ml) that liquid is distributed multiplies each other with the time (min) and calculates amount of fluid.
In order to prepare for test, the NO.357 blue liquid dyestuff (part No00357) of 114ml join 1000ml+/-prepare certain density solution in the distilled water of 5ml.By with 30ml+/-concentrated solution of 1ml join 3400ml+/-prepare testing liquid in the distilled water of 5ml.Dyestuff is by Warner-Jenkinson Co., St.Louis, and MO provides.The liquid volume of test usefulness is 1000ml, and this fluid storage is in the graduated cylinder of 1000ml.
Use an automatically positive flow rate pump that the liquor pump in the graduated cylinder is delivered in the sample, for example, adopt a Maserflex pump, part number (part number) is 826028.This pump has a Maserflex pump head, and part number (part number) is 1034618, and this pump head is connected with the silicone tube of part number (part number) for the Maserflex of 96410-14 (R) #14.Above-mentioned parts can obtain from Cole-palmerInstrument Co.CHIcago.IL.4 inches long injection needles or laboratory sleeve pipe, for example the stainless telescopic part number of the band luer-loc of 14Ga (part number) is BD1789, can be from Franklin Lakes, the Becton Dickinson of NJ obtains.No. 14 entry needle has identical internal diameter with silicone tube, thereby makes equipment increase rigidity, helps the support to the instrument delivery end.
Pump operated in advance through 10 minutes so that air is driven away, thereby and after making the pump preheating guarantee evenly to carry, this automatic pump with the solution in the graduated cylinder with per minute 15ml+/-speed of 1ml is pumped in the sample.Injection needle end is supported by the ring that clip together is assembled together, and supports access end in experimentation.Regulate the height of entry needle, what make pin and sample has a space of 3 millimeters between body surface.(if sample can be adjusted the height of pin because of the moisture absorption swelling in experimentation, to keep 3 millimeters space).
In order to measure absorbability, sample is placed on the central authorities of induction grid, and its body-facing surface is placed up, and it is oriented at that place's reception liquid of representing the longitudinal axis and transverse axis to intersect.Primer pump and timer when liquid is moved on the induction grid from sample, are closed pump and timer, thereby can calculate absorbability (the milliliter number of per minute).
The artificial of use is according to United States Patent (USP) 5,883 through liquid in test, and 231 record is made by blood and albumen, promptly blood separation is become blood plasma and erythrocyte, Protein Separation is become condensed and rare part, and at this, " condensed " refers to after the aforementioned homogenization at 150sec -1The viscosity that has about 20 centipoises under the condition.Then, condensed albumen and blood plasma are thoroughly mixed, add erythrocyte and thoroughly mixing once more at last.Be more detailed description below to this process:
The Sanguis sus domestica deproteinization, with the speed of 3000rpm centrifugal 30 minutes.Certainly, if effectively talk about, also can adopt other method or speed and time.Separated and the storage respectively of blood plasma, the mantle above removing, and store the erythrocyte of piling up respectively.It should be noted that blood must handle in some way, it is not solidified in processing procedure.The whole bag of tricks for example makes the blood defiber, so that remove the fibrous material that solidifies, it all is well known in the art adding anticoagulant curing composition or other method.In order to make blood useful, it must be noncondensing, is not damaging under blood plasma and the erythrocytic situation, and the whole bag of tricks that can achieve the above object all is an acceptable.
Big egg is separated, remove yolk and chalaza (chalazae), keep albumen.Albumen is separated into condensed and rare part by 1000 microns nylon net filter after about 3 minutes, removes rare part.The proteic condensed part that is kept on the drainage screen is collected, and is pumped to 60cc (cm 3) syringe in, put it to then above programme controlled syringe pump, by extruding and reinjecting 5 times and homogenization.The quantity of homogenization is subjected to the control of the inside diameter (being about 0.12 inch) of the speed (being about 100 ml/min) of syringe pump and syringe.Through after the homogenization, 20 centipoises when the viscosity of the condensed part of albumen has the 150sec-1 of being approximately.Then the condensed part of albumen is put in the centrifuge, rotated about 10 minutes with the speed of about 3000rpm, chip and bubble removal.
Through centrifugal, the albumen that uses syringe will comprise the condensed homogenization of ovamucin is injected into 300cc's
Figure C0181293600271
In the transfer vessel (Transfer pack container).Then 60 milliliters blood plasma is joined
Figure C0181293600272
Transducer in.
Figure C0181293600273
Transfer vessel is clamped, and all bubbles are removed, and is put into then in the Stomacher test chamber blender, at these with normal medium speed mixed about 2 minutes.Then will
Figure C0181293600274
Transfer vessel takes out from blender, adds 60 milliliters swine erythrocyte, presents homogenization with about 2 minutes of hand moving content or up to content.The hemocyte capacity of final mixture is: erythrocyte weight accounts for about 30%, usually according to this embodiment make artificial in liquid, hemocyte weight is at least in accounting for the scope of 28-32%.Albumen weight accounts for about 40%.
Artificial raw material that uses in the liquid manufacture process and equipment are easy to obtain.Following detail list is represented its source, if other source can provide the article that are equal to mutually with above-mentioned article, also can use at this.
Blood (pig): Cocalico biological, Inc., 449 stevens Rd., Reamstown, PA 17567, (717) 336-1990.
Figure C0181293600275
Transfer vessel, 300ml, tape adapter unit, code are 4R2014:Baxter HealthcareCorporation, Fenwal Division, Deerfield, IL60015.
Harvard Apparatus programmable infusion pump, model are 55-4143:Harvard Apparatus, South Natick, Ma01760.
Stomacher 400 test chamber blenders, model is .BA7021, series number is 31968:SewardMedical, London, England, UK.
1000 micron filters, production number are CMN-1000-B:S mall Parts, Inc., PO Box4650, Miami Lakes, FL33014-0650,1-800-220-4242.
The device of Hemata Stat-II device stat-11, series number are 1194Z03127:SeperationTechnology, Inc., 1096 Rainer Drive, Altamont Springd, FL132714.
In general, the thickness of material and internal diameter are at 0.05psi (3.5g/m 2) measure with Starret molded capacity tester or other conventional volume detector down.Measurement result is represented with millimeter.Various piece volumes can be calculated by the length of measuring, wide and thickness.Volume is represented (cm with cubic centimetre 3).
According to the result as can be seen, absorb liner and have consistent relatively absorption project and absorbent properties.Absorption liner with multi-component absorbent structure is compared the anti-moisture regain energy with improvement with the liner on the conventional meaning.
Table 1
Figure C0181293600281
Embodiment 2
In embodiment 2, two kinds of different ultra-thin feminien hygiene liners are determined, compare the effectiveness that is had so that determine this absorbent item of multi-part liquid absorbing structure that comprises with the feminien hygiene liner on the conventional meaning more.In this embodiment, a kind of liner with multi-part liquid absorbing structure is identified as Goodfeel II, and more the commercial feminine liner on the conventional meaning is identified as the ultra-thin liner of Whisper.The ultra-thin liner of this kind can obtain from Whisper (Thailand).Table 2 has shown every kind of particular value that liner is measured.
Goodfeel II liner has the multi-part liquid absorbing structure, and in this structure, the first Liquid Absorption parts have about 38 square centimeters area, and the second Liquid Absorption parts have about 131 square centimeters area.
The first Liquid Absorption parts have the thickness of about 1.5 millimeters (0.15 centimetres), thereby produce about 6cm 3Volume calculated.Goodfeel II liner has used the second Liquid Absorption parts that formed by cellulose villus.These parts have the thickness of about 1.7 millimeters (0.17 centimetres), thereby produce about 22cm 3Volume calculated.
The first Liquid Absorption parts are can be from Buckeye Technologies, and the material that Inc. obtains, commercial product code are Unicore 8001.This material has the basic weight of about 230gsm, has the liquid absorption capacity of about 6 grams of every gram material.The second Liquid Absorption parts are the bat that comprises the wood pulp fluff of about 0.25gm superabsorbent material.The second Liquid Absorption parts basic weight is about 213gsm, has the liquid absorption capacity of about 10 grams of every gram material.
The commercially available feminien hygiene liner of matched group be Whisper arrange ultrathin feminien hygiene liner can be from the Procter of Thailand ﹠amp; Gamble company obtains.In general, these liners comprise Liquid Absorption parts, and these parts can be described as and comprise by melting and spraying or the similar first adhesive-bonded fabric distribution/transport layer that supports of nonwoven fabric layer.The gross thickness of this layer is about 0.75 millimeter (0.075 a centimetre), and length is about 140 centimetres, and width is about 60 centimetres.This Whisper liner also comprises second absorbed layer of being made up of wood pulp fluff and superabsorbent material.The thickness of this second layer is about 1.5 millimeters (0.15 centimetres), and length is about 195 centimetres, and width is about 65 centimetres.
Each liner all is an absorption rate of measuring them with aforesaid mensuration process.In addition, the wet test that returns of each liner is all measured with aforesaid time wet mensuration process.At last, each liner all is an absorbability of measuring them with the process of aforesaid mensuration absorbability.According to the result as can be seen, each liner all has consistent relatively absorbability.Yet Goodfeel II liner has a higher relatively absorption rate, and compares with commercially available liner, has the anti-moisture regain energy of improvement.
Table 2
Figure C0181293600301
Embodiment 3
In embodiment 3, two kinds of different ultra-thin feminien hygiene liners that comprise superabsorbent material are determined, compare the effectiveness that is had so that determine this absorbent item that comprises the multi-part liquid absorbing structure with more conventional commercial feminine liner.In this embodiment, a kind of liner with multi-part liquid absorbing structure is identified as the C-ultrathin type, and more conventional commercial feminine liner is can be from the Procter﹠amp in Hong Kong; The ultrathin liner of the Whisper that Gamble company obtains.Table 3 has shown every kind of particular value that liner is measured.
The ultrathin liner of this C-has Guial porous membrane top flat and the impermeable egative film of liquid that obtains from French Guial Film.This liner comprises the multi-part liquid absorbing structure, and wherein the first Liquid Absorption parts have about 38 square centimeters area, and the second Liquid Absorption parts have about 131 square centimeters area.
The first Liquid Absorption parts have the thickness of about 1.5 millimeters (0.15 centimetres), thereby produce about 0cm 3Volume calculated.
The first Liquid Absorption parts are by being can be from Buckeye Technologies, and a kind of material that Inc. obtains, commercial product code are Unicore 8001.This material has the roughly basic weight of 230gsm, has the liquid absorption capacity of about 6 grams of every gram material.The second Liquid Absorption parts be comprise that the superabsorbent material of the wood pulp fluff of about 60% weight and about 40% weight forms bat.The second Liquid Absorption parts basic weight is about 356gsm, has the liquid absorption capacity of about 40 grams of every gram material.
The extra-thin commercially available feminien hygiene liner of Whisper board has the porous membrane top flat.In general, these liners comprise Liquid Absorption parts, and these Liquid Absorption parts can be described as to have and melting and spraying or similar first airlaid layer of nonwoven fabric layer upper support.The gross thickness of this layer is about 0.75 millimeter (0.075 a centimetre), and length is about 140 millimeters, and width is about 60 millimeters.This Whisper liner also comprises second absorbed layer of being made up of wood pulp fluff and superabsorbent material.The gross thickness of this second layer is about 1.5 millimeters (0.15 centimetres), and length is about 175 millimeters, and width is about 65 millimeters.
Each liner all is absorption rate, moisture regain energy and an absorbability of measuring them with aforesaid mensuration process.According to the result as can be seen, each liner all has consistent relatively absorbability.Yet the ultrathin liner of this C-has higher relatively absorption rate, compares with commercially available liner, has the anti-moisture regain energy of improvement.
Table 3
Figure C0181293600311
Embodiment 4
This embodiment has illustrated the first Liquid Absorption parts in the multi-part liquid absorbing structure are how a large amount of relatively artificial shove (after 1 minutes) through liquid to be moved to rapidly in the second Liquid Absorption parts.
The first Liquid Absorption parts are that the form with adherent, as to comprise multilayered fibrous material layer flexible fiber matrix exists.Two kinds of dissimilar materials that use in the first Liquid Absorption parts are used for illustrating the superiority of the multilamellar absorbing structure with particular types.
The bat that the second Liquid Absorption parts are made up of the superabsorbent material of the wood pulp fluff of about 60% weight and about 40% weight.The second Liquid Absorption parts basic weight is about 356gsm, has the liquid absorption capacity of about 16 grams of every gram material, has about 131 square centimeters area.
Wherein a kind of material that the first Liquid Absorption parts use is can be from Buckeye Technologies, and Inc. obtains, and commercial product code is Unicore 8001.This material has the basic weight of about 230gsm, has the liquid absorption capacity of about 6 grams of every gram material.This material has about 38 square centimeters area.The first Liquid Absorption parts have the thickness of about 1.5 millimeters (0.15 centimetres), thereby produce 6cm 3Volume calculated.This material is identified as " material #1 " in table 4 and table 5.
The another kind of material that the first Liquid Absorption parts use has the basic weight of about 200gsm.This material is identified as " material #2 " in table 4 and table 5, this material comprises that basic weight is approximately first airlaid layer of 50gsm.This ground floor comprises the polyester fiber of every of 15 danier of about 85% weight, is bonded together by the conventional rubber adhesive fiber of about 15% weight, and this binding agent is applicable to the personal care product." material #2 " comprise basic weight be approximately 150gsm second airlaid layer.This second layer comprises the cellulose fibre of about 90% weight and two adhering components fibers of about 10%, this pair adhering components fiber is made up of skin-core structure, core is a polyester, skin is polyethylene and quasi-polyethylene, when heating in order to make the rubber adhesive drying, skin can soften or melt, thereby it is active to make binder fibre have heat.This special combination layer has the gross thickness of 38 square centimeters area and about 1.6 millimeters (0.16 centimetres), thereby produces about 6.1cm 3Volume calculated.。
In each test, each parts of liquid absorbing structure are all weighed, and write down its weight numerical value.This structure can be reconfigured.Approximately 10ml's is artificial through the shove middle body of first first type surface of the first Liquid Absorption parts that are applied to previously defined absorbing structure of liquid.After about 60 seconds (1 minutes), various parts are separated, and weighed again.The difference of weight in wet base and dry weight is exactly the amount of fluid that is kept at 60 seconds interval inner part.
Table 4
Figure C0181293600331
Amount of fluid through the various parts after 1 minute is all determined, and has calculated percent.The result is displayed in Table 5.
Table 5
Figure C0181293600332
Though most of description the of the present invention all is at the feminien hygiene liner, the present invention also goes for other absorbent item, for example diaper and incontinence article.Therefore, the present invention has the configuration of wide range in the use, has the product of updating in protection, side leakage and comfort aspect thereby can provide on the basis of existing technology.

Claims (16)

1. multi-part liquid absorbing structure, it comprises:
The first Liquid Absorption parts (118), it is adherent flexible fiber matrix, these first Liquid Absorption parts have first first type surface, second first type surface, first gross area and first liquid absorption capacity, and
The second Liquid Absorption parts (116), it is the another kind of liquid absorption material layer that is adjacent to second first type surface of the first Liquid Absorption parts, the second Liquid Absorption parts have second gross area and second liquid absorption capacity,
It is characterized in that, liquid absorbing structure constitutes like this, thereby the ratio of second gross area and first gross area was greater than 3.5: 1, the ratio of second liquid absorption capacity and first liquid absorption capacity was greater than 10: 1, and total liquid ability of liquid absorbing structure is greater than 35 grams, and adherent flexible fiber matrix has the multilayered fibrous material layer, and the multilayered fibrous material layer of the first Liquid Absorption parts provides the distribution in such space, interval, and is promptly less in abutting connection with the space, interval at the first first type surface place in abutting connection with the interval void ratio at the second first type surface place.
2. liquid absorbing structure according to claim 1 is characterized in that, these first Liquid Absorption parts have first volume, and
The second Liquid Absorption parts have second volume, the ratio of second volume and first volume greater than the cumulative volume of 10: 1 and liquid absorbing structure less than 130cm 3
3. liquid absorbing structure according to claim 1 is characterized in that,
These first Liquid Absorption parts have first thickness and first volume, and
The second Liquid Absorption parts have second thickness and second volume,
All between the 1-2 millimeter, the ratio of second liquid absorption capacity and first liquid absorption capacity was greater than 10: 1 for the thickness of each parts in the first Liquid Absorption parts and the second Liquid Absorption parts; The ratio of second volume and first volume was greater than 10: 1, and the cumulative volume of this liquid absorbing structure is less than 30cm 3
Like this, apply the shoving 1 minute of 10ml to this absorbing structure after, the first Liquid Absorption parts keep less than 30% artificial through liquid.
4. liquid absorbing structure according to claim 1 is characterized in that, the first Liquid Absorption parts apply the shoving 1 minute of 10ml to this absorbing structure after, keep less than 30% artificial through liquid.
5. liquid absorbing structure according to claim 1, it is characterized in that the first Liquid Absorption parts have the layer that chemically-modified cellulose fiber, aquagel fibre or their compositions by the cellulose fluff wool fibre of air lay length level fiber, air lay, air lay form.
6. liquid absorbing structure according to claim 5 is characterized in that, the first Liquid Absorption parts also comprise microparticle material.
7. according to claim 5 or 6 described liquid absorbing structures, it is characterized in that the first Liquid Absorption parts utilize that heat-bondable fibre, binding agent, thermal point bond, machinery are entwined, emulsion agent or their combination bond.
8. according to claim 5 or 6 described liquid absorbing structures, it is characterized in that the first Liquid Absorption parts utilize heat-bondable fibre, binding agent, emulsion agent or their combination to bond.
9. according to described liquid absorbing structure one of among the claim 1-5, it is characterized in that the multilayered fibrous material layer of the common first Liquid Absorption parts comprises two-layer at least nonwoven fibrous web net.
10. liquid absorbing structure according to claim 9, it is characterized in that the one deck at least in the above-mentioned two-layer nonwoven fibrous web net is selected from bonded carded fibrous web, air lay reticulated, meltblown fiber web, spunbond long fibre net, water thorn interlacing fiber net, mechanical interlacing fiber net and above-mentioned compositions.
11., it is characterized in that the second Liquid Absorption parts are selected from hydrogel structure, the cellulose villus structure that comprises composite construction and are generally uniform airflow and become web frame according to described liquid absorbing structure one of among the claim 1-6.
12. according to described liquid absorbing structure one of among the claim 1-6, it is characterized in that, the space, interval at the second first type surface place of the first Liquid Absorption parts is configured to make the length direction transmission of liquid along the first Liquid Absorption parts, and liquid is discharged in the second Liquid Absorption parts.
13., it is characterized in that the first Liquid Absorption parts are being to distribute like this aspect the space, interval: the space, interval in abutting connection with the second first type surface place is little, and the space, interval at the adjacent first first type surface place is big according to described liquid absorbing structure one of among the claim 1-6.
14. according to described liquid absorbing structure one of among the claim 1-6, it is characterized in that the second Liquid Absorption parts comprise a recessed road (128), this recessed road extends in the marginal portion of the first Liquid Absorption parts at least.
15. according to described liquid absorbing structure one of among the claim 1-5, it is characterized in that, after the central authorities to first first type surface of the first Liquid Absorption parts applied shoving 10 minutes of 5ml, the first Liquid Absorption parts had been covered the second Liquid Absorption parts by at least 50% of the artificial contaminated area that produces through liquid.
The sanitary towel (110) of having improved the liquid handling ability 16. used the multi-part liquid absorbing structure, this sanitary towel has a longitudinal centre line, and this sanitary towel comprises:
Liquid can see through towards health layer (112);
Liquid cannot see through towards clothes layer (214);
According to the described multi-part liquid absorbing structure of one of claim 1-6, liquid can see through towards health layer and liquid cannot see through towards between the clothes layer, wherein at least a portion of the first Liquid Absorption parts is positioned on the longitudinal centre line of sanitary towel.
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US9339424B2 (en) * 2013-10-24 2016-05-17 Kimberly-Clark Worldwide, Inc. Absorbent article having an absorbent assembly with integral containment flaps
CN105105924B (en) * 2015-06-12 2019-04-19 湖北立天生物工程有限公司 A kind of high antibacterial of body surface, ventilative, the dry and comfortable protection pad of refrigerant healthy functions
CN105012080B (en) * 2015-06-12 2019-04-16 湖北立天生物工程有限公司 A kind of salubrious sanitary napkin of healthy functions that the high antibacterial superabsorbent water of body surface is ventilative
CN105362000B (en) * 2015-11-30 2019-01-04 广东春本科技有限公司 A kind of sanitary napkin
CN105662732B (en) * 2016-03-17 2019-04-30 泉州市汉威机械制造有限公司 A kind of absorptive core

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