|Número de publicación||US20060264861 A1|
|Tipo de publicación||Solicitud|
|Número de solicitud||US 11/133,818|
|Fecha de publicación||23 Nov 2006|
|Fecha de presentación||20 May 2005|
|Fecha de prioridad||20 May 2005|
|También publicado como||CN101018526A, CN101018526B, EP1885313A1, EP2189138A2, EP2189138A3, US20150073365, US20150112291, WO2006127349A1|
|Número de publicación||11133818, 133818, US 2006/0264861 A1, US 2006/264861 A1, US 20060264861 A1, US 20060264861A1, US 2006264861 A1, US 2006264861A1, US-A1-20060264861, US-A1-2006264861, US2006/0264861A1, US2006/264861A1, US20060264861 A1, US20060264861A1, US2006264861 A1, US2006264861A1|
|Inventores||Gary LaVon, Kevin Smith, Michael Hayden|
|Cesionario original||Lavon Gary D, Smith Kevin M, Hayden Michael P|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (99), Citada por (12), Clasificaciones (16), Eventos legales (1)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
This invention relates to disposable absorbent articles such as disposable diapers and other articles intended for use on incontinent persons.
Disposable absorbent articles are designed to absorb and contain bodily waste in order to prevent soiling of the body and clothing of the wearer, as well as bedding or other objects with which the wearer comes into contact.
As the usage of disposable absorbent articles has expanded, their complexity has increased with the incorporation of additional features serving to enhance their performance and appearance. The costs of the materials and the costs of the manufacturing processes have also increased in conjunction with the increase in complexity. As a result, the prices at which these articles are sold have risen to levels that many potential purchasers around the world cannot afford to pay. Thus, a need exists for a simple disposable absorbent article.
A disposable absorbent article includes a chassis and an absorbent assembly. The chassis includes a water-impermeable center sheet and laterally opposing water vapor-permeable side sheets attached to the center sheet adjacent to its side edges. Laterally opposing portions of the chassis are folded laterally inward and attached to the interior surface of the chassis adjacent to its end edges to form breathable side flaps. Each side flap has a longitudinally extending elastic gathering member attached adjacent to its proximal edge. The absorbent assembly is smaller in width and in length than the chassis. The side edges and end edges of the absorbent assembly may be disposed proximally relative to the respective side edges and end edges of the chassis. The absorbent assembly includes an absorbent core. The absorbent core may contain superabsorbent particles and these particles may be contained inside pockets. The chassis center sheet may be laterally extensible and may include an extensible formed web material. The absorbent assembly may be attached in a cruciform pattern to the chassis to allow portions of the chassis to extend laterally.
In the accompanying drawing figures, like reference numerals identify like elements, which may or may not be identical in the several exemplary embodiments that are depicted. Some of the figures may have been simplified by the omission of selected elements for the purpose of more clearly showing other elements. Such omissions of elements in some figures are not necessarily indicative of the presence or absence of particular elements in any of the exemplary embodiments, except as may be explicitly delineated in the corresponding written description.
In this description, the following terms have the following meanings:
The term “absorbent article” refers to a device that absorbs and contains liquid, and more specifically, refers to a device that is placed against or in proximity to the body of the wearer to absorb and contain the various exudates discharged from the body.
The term “diaper” refers to an absorbent article that is generally worn by infants and incontinent persons about the lower torso so as to encircle the waist and the legs of the wearer and that is specifically adapted to receive and contain urinary and fecal waste.
The term “disposable” refers to the nature of absorbent articles that generally are not intended to be laundered or otherwise restored or reused as an absorbent article, i.e., they are intended to be discarded after a single use and, preferably, to be recycled, composted or otherwise disposed of in an environmentally compatible manner.
The term “longitudinal” refers to a direction running from a waist edge to an opposing waist edge of the article and generally parallel to the maximum linear dimension of the article. Directions within 45 degrees of the longitudinal direction are considered to be “longitudinal”.
The term “lateral” refers to a direction running from a side edge to an opposing side edge of the article and generally at a right angle to the longitudinal direction. Directions within 45 degrees of the lateral direction are considered to be “lateral”.
The term “disposed” refers to an element being attached and positioned in a particular place or position in a unitary structure with other elements.
The term “attached” refers to elements being connected or united by fastening, adhering, bonding, etc. by any method suitable for the elements being attached together and their constituent materials. Many suitable methods for attaching elements together are well-known, including adhesive bonding, pressure bonding, thermal bonding, mechanical fastening, etc. Such attachment methods may be used to attach elements together over a particular area either continuously or intermittently.
The term “cohesive” refers to the property of a material that sticks to itself but does not to any significant degree stick to other materials.
The terms “water-permeable” and “water-impermeable” refer to the penetrability of materials in the context of the intended usage of disposable absorbent articles. Specifically, the term “water-permeable” refers to a layer or a layered structure having pores, openings, and/or interconnected void spaces that permit liquid water to pass through its thickness in the absence of a forcing pressure. Conversely, the term “water-impermeable” refers to a layer or a layered structure through the thickness of which liquid water cannot pass in the absence of a forcing pressure. A layer or a layered structure that is water-impermeable according to this definition may be permeable to water vapor, i.e., may be “water vapor-permeable”. Such a water vapor-permeable layer or layered structure is commonly known in the art as “breathable”. As is well known in the art, a common method for measuring the permeability to water of the materials typically used in absorbent articles is a hydrostatic pressure test, also called a hydrostatic head test or simply a “hydrohead” test. Suitable well known compendial methods for hydrohead testing are approved by INDA (formerly the International Nonwovens and Disposables Association, now The Association of the Nonwoven Fabrics Industry) and EDANA (European Disposables and Nonwovens Association).
The terms “proximal” and “distal” refer respectively to the location of an element relatively near to or far from the center of a structure, e.g., the proximal edge of a longitudinally extending element is located nearer to the longitudinal axis than the distal edge of the same element is located relative to the same longitudinal axis.
The terms “interior” and “exterior” refer respectively to the location of an element that is intended to be placed against or toward the body of a wearer when an absorbent article is worn and the location of an element that is intended to be placed against or toward any clothing that is worn over the absorbent article. Synonyms for “interior” and “exterior” include, respectively, “inner” and “outer”, as well as “inside” and “outside”. Also, when the absorbent article is oriented such that its interior faces upward, e.g., when it is laid out in preparation for setting the wearer on top of it, synonyms include “upper” and “lower”, “above” and “below”, “over” and “under”, and “top” and “bottom”, respectively.
In the following description and in the drawing figures, various structural elements are identified by reference numerals without suffixed letters when referring to the group as a whole and by the same reference numerals with suffixed letters when distinguishing between, for example, left and right members of the group. As an example, the side flaps as a group are identified by the reference numeral 147 while the individual left and right side flaps are respectively designated as elements 147 a and 147 b.
Description of Exemplary Diaper Embodiment
Reference is made to
One end portion of the exemplary diaper 20 is configured as a front waist region 36. The longitudinally opposing end portion of the diaper 20 is configured as a back waist region 38. An intermediate portion of the diaper 20 extending longitudinally between the front waist region 36 and the back waist region 38 is configured as a crotch region 37.
The basic structure of the diaper 20 includes a chassis 100. The chassis 100 has a laterally extending front waist edge 136 in the front waist region 36 and a longitudinally opposing and laterally extending back waist edge 138 in the back waist region 38. The chassis 100 has a longitudinally extending left side edge 137 a and a laterally opposing and longitudinally extending right side edge 137 b, both chassis side edges extending longitudinally between the front waist edge 136 and the back waist edge 138. The chassis 100 has an interior surface 102 and an exterior surface 104. The exterior surface 104 is intended to be placed toward any clothing that is worn over the diaper 20. The chassis 100 also has a longitudinal axis 42 and a lateral axis 44. The longitudinal axis 42 extends through the midpoint of the front waist edge 136 and through the midpoint of the back waist edge 138 of the chassis 100. The lateral axis 44 extends through the midpoint of the left side edge 137 a and through the midpoint of the right side edge 137 b of the chassis 100. The exemplary chassis 100 shown in
The basic structure of the diaper 20 also includes an absorbent assembly 200 that is attached to the chassis 100. The absorbent assembly 200 has a laterally extending front edge 236 in the front waist region 36 and a longitudinally opposing and laterally extending back edge 238 in the back waist region 38. The absorbent assembly 200 has a longitudinally extending left side edge 237 a and a laterally opposing and longitudinally extending right side edge 237 b, both absorbent assembly side edges extending longitudinally between the front edge 236 and the back edge 238. The absorbent assembly 200 has an interior surface 202 and an exterior surface 204. The absorbent assembly 200 may be disposed symmetrically with respect to either or both of the longitudinal axis 42 and the lateral axis 44. Alternatively, the absorbent assembly 200 may be disposed asymmetrically with respect to either or both of the longitudinal axis 42 and the lateral axis 44. For example, the absorbent assembly 200 shown in
The respective front edge 236, back edge 238, left side edge 237 a, and right side edge 237 b of the absorbent assembly 200 may lie inward of the respective front waist edge 136, back waist edge 138, left side edge 137 a, and right side edge 137 b of the chassis 100, as in the exemplary diaper 20 shown in
When the diaper 20 is worn on the lower torso of a wearer, the front waist edge 136 and the back waist edge 138 encircle the waist of the wearer, while at the same time the side edges 137 a and 137 b encircle the legs of the wearer. At the same time, the crotch region 37 is generally positioned between the legs of the wearer and the absorbent assembly 200 extends from the front waist region 36 through the crotch region 37 to the back waist region 38.
Description of the Chassis
The chassis 100 includes a water-impermeable center sheet 26 having a left side edge 126 a and a right side edge 126 b. Many suitable materials for use as the center sheet 26 are well-known, including films of polyethylene and other polyolefins. Multi-layer center sheets, such as laminates of a film and a nonwoven, are also well-known and may be suitable for use as the center sheet 26. Such a laminate center sheet may be oriented with the nonwoven disposed exteriorly to provide the feel and appearance of a more cloth-like outermost layer than would be provided by using the film as the outermost layer.
The chassis 100 may, but need not, additionally include an inner liner 22, as shown in
The inner liner 22 may extend to the edges of the chassis 100. Alternatively, one or more of the edges of the inner liner 22 may lie inward of the edges of the chassis 100. For example, with reference to the exemplary diaper 20 shown in
The chassis 100 includes longitudinally extending laterally opposing side sheets 60 attached to the center sheet 26 adjacent to its side edges 126. For example, the side sheets may be attached to the center sheet by continuous, water impermeable bonds or seals made by any of several known methods, such as the application of adhesives, mechanical bonding, and thermal bonding, or a combination of known bonding methods.
When the exemplary chassis 100 is laid out flat, each side sheet 60 overlaps the center sheet 26 such that the proximal edge 61 a of the left side sheet 60 a lies laterally inward of the left side edge 126 a of the center sheet 26 and the proximal edge 61 b of the right side sheet 60 b lies laterally inward of the right side edge 126 b of the center sheet 26. Each side sheet 60 extends laterally outwardly from its proximal edge 61 past the respective side edge 126 of the center sheet 26 to its distal edge 62. Thus, the distal edges 62 of the side sheets 60 form the outer side edges 155 of the chassis 100 in this laid out flat condition.
Each side sheet 60 may be doubled over substantially its entire area, either by folding the side sheet or by adding a second layer to the side sheet. For example, as shown in
Alternatively, such a doubled side sheet 60 may be attached to either the exterior surface 124 or the interior surface 122 of the center sheet 26 adjacent to both of its proximal edges 61. For example, each of the doubled side sheets 60 shown in
The layers of each doubled side sheet 60 may remain unattached to each other and thus free to contact each other or separate from each other. Alternatively, the layers of each doubled side sheet 60 may be attached together laterally continuously or intermittently between the proximal edges 61 and the proximal edge 157 of the side flap 147. For example, the layers of each doubled side sheet 60 may be attached together by adhesives, mechanical bonds, or thermal bonds, or by a combination of known bonding methods.
In the exemplary embodiment shown in
Alternatively, or in addition, the layers of the each doubled side sheet 60 may be attached together in the waist regions 36 and 38 adjacent to the waist edges 136 and 138, for example in laterally extending attachment zones 159 as shown in
Alternatively, each side sheet 60 may have the form of a single layer. For example, as shown in
Exemplary materials suitable for use in the side sheets 60 include polyolefinic films, microporous or other breathable formed films, breathable monolithic films, and hydrophobic nonwovens. Suitable hydrophobic nonwovens include SM (spunbond meltblown), SMS (spunbond meltblown spunbond), and SMMS (spunbond meltblown meltblown spunbond) composites. The materials of the water vapor-permeable side sheets may be selected to balance overall product economics and function. For example, a relatively more expensive nonwoven material having a relatively high basis weight may provide an acceptable level of water-impermeability for use in a single layer side flap construction. Alternatively, a relatively less expensive nonwoven having a relatively lower basis weight may provide the requisite level of water-impermeability only if it is doubled, thereby requiring a relatively greater area of material. As another example, a microporous film may provide a relatively optimal combination of water-impermeability and material cost.
As shown in
The chassis 100 may simply be folded loosely or may be creased along a portion of each of its side edges 137. For example, it may be desirable to form creases along portions of the side edges 137 in the crotch region 37 in order to impart a more finished appearance to the diaper 20. Alternatively or in addition to creasing, a portion of each of the folded side flaps 147 adjacent to the side edges 137 may be attached to the interior surface 102 of the chassis 100 to achieve a similar result.
Each side flap 147 has a proximal edge 157. In the exemplary diaper 20 shown in
In the exemplary chassis 100 shown in
Each of the breathable side flaps 147 is attached to the interior surface 102 of the chassis 100 in attachment zones located in the front waist region 36 and in the back waist region 38. For example, in the chassis 100 shown in
Alternatively, each attachment zone may extend laterally across the full width of the respective side flap. For example, a laterally oriented adhesive attachment zone may extend laterally from the chassis side edge 137 to the side flap proximal edge 157 and thereby attach the entire width of the side flap 147 adjacent to the front waist edge 136 to the interior surface 102 of the chassis 100. In embodiments in which the front edge 236 or the back edge 238 of the absorbent assembly 200 coincides with the respective front waist edge 136 or back waist edge 138 of the chassis 100 and the side flaps 147 overlap the absorbent assembly 200, the side flaps 147 may be attached to the absorbent assembly 200 instead of, or in addition to, being attached to the interior surface 102 of the chassis 100.
Between the attachment zones, the proximal edges 157 of the side flaps 147 remain free, i.e., are not attached to the interior surface 102 of the chassis 100 or to the absorbent assembly 200. Also between the attachment zones, each breathable side flap preferably includes a longitudinally extensible flap elastic member that is attached adjacent to the proximal edge of the side flap by any of many well-known means. Each such flap elastic member may be attached over its entire length or over only a portion of its length. For example, such a flap elastic member may be attached only at or near its longitudinally opposing ends and may be unattached at the middle of its length. Such a flap elastic member may be disposed in the crotch region 37 and may extend into one or both of the front waist region 36 and the back waist region 38. For example, in the exemplary chassis 100 shown in
Each flap elastic member may be enclosed inside a folded hem. For example, in the exemplary chassis 100 shown in
When stretched, the flap elastic member adjacent to each side flap edge allows the side flap edge to extend to the flat uncontracted length of the chassis, e.g., the length of the chassis 100, as shown in
When the diaper 20 is worm, the relaxed “U” shape generally conforms to the body of the wearer such that the front waist region 36 and the back waist region 38 can be fastened together to encircle the waist and the legs of the wearer. When the diaper 20 is worn in this manner, the elastic strands 167 tend to hold the lifted proximal edges 157 of the side flaps 147 in contact with the body of the wearer and thereby form seals to help prevent the leakage of deposited bodily waste out of the diaper 20. The lateral spacing of the lifted proximal edges 157 is selected to allow the deposit of bodily wastes from the lower torso of the wearer into the space between the lifted side flaps 147 and thereby directly onto the absorbent assembly 200. The width of each of the side flaps 147 in effect becomes its height when the free portion of its proximal edge is lifted and the side flap serves as a side barrier to leakage. This height preferably is selected to allow the lifted proximal edges 157 to fit into the leg creases of the body of the wearer at the same time as the absorbent assembly 200 is held in contact with the body.
In the finished diaper, the chassis may have a generally rectangular shape, as in the exemplary diaper 20 shown in
An exemplary form of a non-rectangular configuration of the chassis is shown in
An alternative way to form an “I”-shaped non-rectangular configuration of the chassis as shown in
Another exemplary way to form a non-rectangular configuration of the chassis is shown in
Alternatively, the laterally opposing portions 107 a and 107 b of the chassis may be folded laterally inward in one or both of the waist regions in addition to being folded laterally inward in the crotch region. For example, in order to simplify the manufacture of the diaper, the laterally opposing portions 107 a and 107 b of the chassis may be folded laterally inward over their entire longitudinal lengths. The interior surface 102 of each of the folded portions 107 a and 107 b may be attached to the interior surface 202 of the absorbent assembly in the crotch region 37 at attachment zones 109 a and 109 b. This folding and attachment forms “W” shaped folds 112 a and 112 b in the chassis as shown in
A portion or the whole of the chassis 100 may be made extensible to a degree greater than the inherent extensibility of the material or materials from which the chassis is made. The additional extensibility may be desirable in order to allow the chassis 100 to conform to the body of a wearer during movement by the wearer. The additional extensibility may also be desirable, for example, in order to allow the user of a diaper 20 including a chassis 100 having a particular size before extension to extend the front waist region 36, the back waist region 38, or both waist regions of the chassis 100 to encircle the waist of an individual wearer whose waist circumference falls within a predefined range, i.e., to tailor the diaper to the individual wearer. Such extension of the waist region or regions may give the diaper a generally hourglass shape, so long as the crotch region 37 is extended to a relatively lesser degree than the waist region or regions, and may impart a tailored appearance to the diaper 20 when it is worn. In addition, the additional extensibility may be desirable in order to minimize the cost of the diaper. For example, an amount of material that would otherwise be sufficient only to make a relatively smaller diaper lacking this extensibility can be used to make a diaper capable of being extended to fit a wearer larger than the smaller diaper would fit. In other words, a lesser amount of material is needed in order to make a diaper capable of being properly fit onto a given size of a wearer when the material is made extensible as described. The portion of the chassis in one of the waist regions may be made laterally extensible to a maximum extensibility greater than a maximum extensibility of another portion of the chassis in the crotch region such that a lateral extension of each of the portions to its maximum extensibility imparts an hourglass shape to the chassis.
Additional extensibility in the chassis 100 in the lateral direction is relatively more useful than additional extensibility in the longitudinal direction because the abdomen of the wearer is likely to expand when the wearer changes posture from standing to sitting and the corresponding abdominal expansion increases the circumference that is encircled by the waist edges of the chassis 100, necessitating the lateral extension of the waist region or regions.
Additional lateral extensibility in the chassis 100 may be provided in a variety of ways. For example, a material or materials from which the chassis 100 is made may be pleated by any of many known methods. Alternatively, all or a portion of the chassis may be made of a formed web material or a formed laminate of web materials like those described in U.S. Pat. No. 5,518,801 issued on 21 May 1996 in the name of Chappell et al. An exemplary fragment 300 of such a formed web material 305 is shown in
The front laterally central portion 117 and the back laterally central portion 118 of the chassis 100 between the attachment zones 153 and 154 may have a different range of extensibility from the portions of the chassis in the attachment zones. Additionally or alternatively, the laterally central portions 117 and 118 may be extensible to a greater or lesser degree when subjected to a given level of opposing tensile forces, i.e., may be more easily or less easily extensible, than the portions of the chassis in the attachment zones. For example, if the chassis is made uniformly extensible across its entire width prior to the formation of the side flaps, the double layering in the areas of the attachment zones after the formation of the side flaps may have an effect of decreasing the degree of lateral extensibility of those areas under a given level of opposing tensile forces, such as by the side flaps acting as parallel “springs” that must be extended in order to extend the underlying attached portion of the chassis. As another example, the altered regions in the laterally central portions of the chassis may be deformed to a greater or a lesser degree than the altered regions in the attachment zones to render the laterally central portions more easily or less easily extensible than the respective portions in the attachment zones.
The front waist region 36 and the back waist region 38 can be fastened together to encircle the waist and the legs of the wearer in many well-known ways. For example, separate fastening devices such as safety pins, separate tapes, a separate tie strap or straps, and/or a separate belt can be used for this purpose. Alternatively or in addition, fastening elements can be incorporated into the chassis 100 to enable a user to apply the diaper 20 to the body of the wearer without, or in conjunction with, any separate fastening devices. Many suitable types of such incorporated fastening elements are well-known, including, for example, tapes, adhesives, adhesive tape tabs, ties, buttons, hooks, loops, snap fasteners, other forms of mechanical fasteners, cohesive patches, etc. These incorporated fastening elements may project laterally outward, i.e., away from the longitudinal axis 42 beyond one or both of the side edges 137 a and 137 b and/or may project longitudinally outward, i.e., away from the lateral axis 44 beyond one or both of the waist edges 136 and 138 or they may lie entirely inside the edges of the diaper 20.
For example, as shown in
When a laminate center sheet is used and is oriented with the nonwoven disposed exteriorly, some forms of mechanical fasteners that typically require specific mating fastener elements, such as hooks that mate with loops, may be configured to engage with the nonwoven and thereby make the inclusion of the specific mating fastener element unnecessary. Alternatively, when a nonwoven material is used to form the side flaps, a mechanical fastener such as the aforementioned hooks may be positioned on the exterior surface of the front waist region, such that when the back waist region of the diaper is brought into an overlapping configuration with the front waist region, the hook material engages the nonwoven material of the side flap.
Optionally, a fastening sheet 116 may be attached onto the exterior surface 104 of the chassis 100 in the front waist region 36 as shown in
The fastening sheet serves to distribute the tensile force transmitted by each of the adhesive tape tabs over an area of the center sheet 26 that is larger than the adhered area of the adhesive tape tab. In addition, when a single fastening sheet such as fastening sheet 116 in
As another example, cohesive fastening elements may be used. Exemplary fastening elements in the form of cohesive fastening patches, such as the patches 110 and 120 shown in
Description of the Absorbent Assembly
As shown in
The absorbent assembly 200 may be attached to the chassis 100 over any part or the whole of the area of the absorbent assembly 200. Preferably, the absorbent assembly 200 is attached on its exterior surface 204 to the chassis 100 in a cruciform attachment pattern, i.e., in an attachment pattern that forms or is arranged in a cross or “+” shape. The cruciform attachment pattern may be contiguous, i.e., all of its portions may be touching or connected throughout the pattern in an unbroken sequence. Alternatively, the cruciform attachment pattern may include detached portions and thereby lack contiguity but still be arranged such that the shape of the overall pattern is a cruciform. For example, a discontiguous cruciform attachment pattern may include a longitudinally extending portion disposed along the longitudinal axis and separate left and right laterally distal portions disposed along or adjacent to the lateral axis and thereby form a cruciform as the shape of the overall pattern.
An exemplary contiguous cruciform attachment pattern 210 is shown in
Within the extent of the cruciform attachment pattern 210, the absorbent assembly 200 may be attached to the chassis 100 continuously or intermittently. For example, a film of an adhesive may be applied continuously over the entire area of the cruciform attachment pattern and then used to continuously attach the absorbent assembly to the chassis. As an alternative example, an adhesive may be applied discontinuously at and inside the boundaries of the cruciform attachment pattern, such as in the form of dots, stripes, beads, spirals, etc., and then used to attach the absorbent assembly to the chassis.
The cruciform attachment pattern 210 may be disposed symmetrically with respect to either or both of the longitudinal axis 42 and the lateral axis 44 of the chassis 100. Alternatively, the cruciform attachment pattern 210 may be disposed asymmetrically with respect to either or both of the longitudinal axis 42 and the lateral axis 44. In addition, the cruciform attachment pattern 210 may be disposed symmetrically with respect to either or both of the side edges 237 and the front edge 236 and the back edge 238 of the absorbent assembly 200. Alternatively, the cruciform attachment pattern 210 may be disposed asymmetrically with respect to either or both of the side edges 237 and front edge 236 and back edge 238.
Suitable configurations of cruciform attachment patterns are disclosed in U.S. patent application Ser. No. 10/880,128 filed on 29 Jun. 2004.
The absorbent core 250 may be disposed between a lower covering sheet that is disposed on the exterior face of the absorbent core 250 and an upper covering sheet that is disposed on the interior face of the absorbent core 250. Such an upper covering sheet and lower covering sheet may be attached together to contain the absorbent core 250 between them and thereby form the absorbent assembly 200. For example, in the exemplary absorbent assembly 200 shown in
The upper covering sheet 24 is water-permeable and allows liquid waste to pass through to the absorbent core 250, where the liquid waste is absorbed. The lower covering sheet 25 may be water-impermeable. However, the lower covering sheet 25 preferably is water-permeable. In embodiments in which both the upper covering sheet 24 and the lower covering sheet 25 are water-permeable, any liquid waste that is deposited onto the upper covering sheet 24 but does not pass through the upper covering sheet 24 to the absorbent core 250 can flow around an edge of the absorbent assembly 200 to reach the lower covering sheet 25 and then pass through the lower covering sheet 25 to the absorbent core 250.
The upper covering sheet 24 may form the interior surface 202 of the absorbent assembly 200 that is intended to be placed against the body of the wearer. The upper covering sheet 24 preferably is formed of a soft material that will not irritate the skin of the wearer. Many materials that are suitable for a water-permeable covering sheet are well-known in the art, including synthetic nonwovens such as spunbonded or carded polypropylene, polyester, or rayon. Likewise, many materials that are suitable for a covering sheet that is water-impermeable are well-known in the art, including the materials that are suitable for the center sheet 26.
The upper covering sheet 24 and the lower covering sheet 25 may extend to the same width and the same length. Alternatively, one or more of the edges of one of the covering sheets may lie distally relative to the respective edge or edges of the other covering sheet. For example, the upper covering sheet may extend longitudinally only to an extent sufficient to cover the absorbent core and the lower covering sheet may extend longitudinally beyond the upper covering sheet toward or to the adjacent waist edge. Such an extended covering sheet may serve to isolate the skin of the wearer from a portion of the center sheet 26 as may be desirable, for example, when the diaper 20 is worn under conditions in which contact between the skin and a center sheet film could be uncomfortable.
In the exemplary absorbent assembly 200 shown in
The absorbent core 250 includes a storage component that serves to absorb and retain liquid bodily waste materials. Suitable known materials for the absorbent core storage component include cellulose fibers in the form of comminuted wood pulp, commonly known as “airfelt”, natural or synthetic fibrous materials, and superabsorbent polymers, used either singly or in mixtures and commonly formed into layers or sheets, etc. These absorbent materials may be used separately or in combination. Many known absorbent materials may be used in a discrete form, i.e., in the form of fibers, granules, particles, and the like. Such a discrete form of an absorbent material may be immobilized by an adhesive that attaches the discrete pieces together to form a coherent layer or that attaches the discrete pieces to a substrate layer or that attaches the discrete pieces both to each other and to the substrate layer.
The absorbent core may include an acquisition component in addition to one or more storage components. The absorbent core acquisition component serves to acquire deposited liquid bodily waste material and transfer it to the absorbent core storage component. Any porous absorbent material which will imbibe and partition liquid bodily waste material to the storage component or components may be used to form the acquisition component. Preferred materials for the acquisition component include synthetic fiber materials, open celled polymeric foam materials, fibrous nonwoven materials, cellulosic nonwoven materials, and various combination synthetic/cellulosic nonwoven materials. For example, the acquisition component may be formed of a nonwoven web or webs of synthetic fibers including polyester, polypropylene, and/or polyethylene, natural fibers including cotton and/or cellulose, blends of such fibers, or any equivalent materials or combinations of materials. Examples of such acquisition materials are more fully described in U.S. Pat. No. 4,950,264 issued to Osborn on Aug. 21, 1990. High loft nonwoven acquisition materials suitable for the acquisition component of the present invention can be obtained from Polymer Group, Inc., (PGI), 450 N.E. Blvd, Landisville, N.J. 08326, U.S.A., under the material code designation of 98920.
Such an absorbent core 250 including an acquisition component 290 overlying an absorbent core storage component 272 is shown in
In some exemplary embodiments, an absorbent core storage component may include the discrete form of an absorbent material that is immobilized in pockets formed by a layer of a thermoplastic material, such as a hot melt adhesive, that intermittently contacts and adheres to a substrate sheet, while diverging away from the substrate sheet at the pockets. Absorbent core components having such structures and being suitable for the storage of liquid bodily wastes are described in U.S. patent applications Ser. Nos. 10/776,839 and 10/776,851, both filed on 11 Feb. 2004 in the name of Ehrnsperger et al. An exemplary absorbent core storage component 272 having such a structure is shown in
Statements of Incorporation by Reference and Intended Scope of Claims
The disclosures of all patents, patent applications and any patents which issue thereon, as well as any corresponding published foreign patent applications, and all publications listed and/or referenced in this description, are hereby incorporated herein by reference. It is expressly not admitted that any of the documents or any combination of the documents incorporated herein by reference teaches or discloses the present invention.
While particular embodiments and/or individual features of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. Further, it should be apparent that all combinations of such embodiments and features are possible and can result in preferred executions of the invention. Therefore, the appended claims are intended to cover all such changes and modifications that are within the scope of this invention.
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|US2977957 *||28 Ago 1957||4 Abr 1961||Napette Sanitary Napkin Holder||Sanitary napkin holders and holder units|
|US3561446 *||20 Oct 1969||9 Feb 1971||Jones Sr John L||Pleated diaper|
|US3572342 *||19 Ene 1968||23 Mar 1971||Johnson & Johnson||Diaper|
|US3578155 *||24 Feb 1969||11 May 1971||Paper Converting Machine Co||Disposable product|
|US3642001 *||27 Jul 1970||15 Feb 1972||Reinhardt N Sabee||Disposable diaper or the like|
|US3653381 *||23 Mar 1970||4 Abr 1972||Crystal E Warnken||Belted diapers|
|US3710797 *||26 Feb 1971||16 Ene 1973||Procter & Gamble||Disposable diaper|
|US3731688 *||30 Jun 1971||8 May 1973||Techmation Corp||Disposable diaper|
|US3860003 *||21 Nov 1973||19 Jun 1990||Contractable side portions for disposable diaper|
|US3863637 *||8 Dic 1972||4 Feb 1975||Int Paper Co||Folded disposable diaper|
|US3882870 *||22 Feb 1974||13 May 1975||Hathaway Lucille||Diaper|
|US3884234 *||18 Oct 1973||20 May 1975||Colgate Palmolive Co||Disposable diaper|
|US3930501 *||23 May 1974||6 Ene 1976||Colgate-Palmolive Company||Disposable diaper with end flap means and method|
|US3938523 *||17 Oct 1974||17 Feb 1976||Scott Paper Company||Prefolded and packaged disposable diaper|
|US4014338 *||14 Ene 1976||29 Mar 1977||Colgate-Palmolive Company||Diaper with elastic means|
|US4074508 *||21 Dic 1976||21 Feb 1978||Riegel Textile Corporation||Apparatus for compressing and banding a predetermined number of articles|
|US4084592 *||8 Ene 1975||18 Abr 1978||Johnson & Johnson||Disposable prefolded diaper with permanently attached adhesive closure system|
|US4257418 *||22 Ene 1979||24 Mar 1981||Mo Och Domsjo Aktiebolag||Device for absorbing urine with incontinent persons|
|US4315508 *||31 Mar 1980||16 Feb 1982||Kimberly-Clark Corporation||Self-centering multiple use garment suspension system|
|US4324246 *||12 May 1980||13 Abr 1982||The Procter & Gamble Company||Disposable absorbent article having a stain resistant topsheet|
|US4585450 *||29 Abr 1985||29 Abr 1986||Kimberly-Clark Corporation||Refastenable tape system for disposable diapers and similar garments|
|US4589878 *||27 Mar 1984||20 May 1986||Beghin-Say S.A.||Disposable diaper|
|US4636207 *||11 Ago 1983||13 Ene 1987||The Procter & Gamble Company||Disposable garment with breathable leg cuffs|
|US4731066 *||10 Feb 1987||15 Mar 1988||Personal Products Company||Elastic disposable diaper|
|US4747846 *||3 Abr 1987||31 May 1988||Kimberly-Clark Corporation||Stretchable disposable absorbent undergarment|
|US4795454 *||30 Oct 1987||3 Ene 1989||The Procter & Gamble Company||Absorbent article having leakage-resistant dual cuffs|
|US4802884 *||10 Jul 1987||7 Feb 1989||Molnlycke Ab||Method of folding into packages disposable absorbent articles, e.g. diapers, in connection with the production thereof|
|US4808176 *||31 Dic 1986||28 Feb 1989||Kimberly-Clark Corporation||Elasticized waist integration member for disposable absorbent garments|
|US4834735 *||18 Jul 1986||30 May 1989||The Proctor & Gamble Company||High density absorbent members having lower density and lower basis weight acquisition zones|
|US4834740 *||26 Oct 1987||30 May 1989||Uni-Charm Corporation||Method for making wearable articles|
|US4834742 *||25 Ago 1987||30 May 1989||Kimberly-Clark Corporation||Fastening system for a disposable absorbent garment|
|US4892528 *||10 Nov 1988||9 Ene 1990||Uni-Charm Corporation||Disposable diaper|
|US4892536 *||2 Sep 1988||9 Ene 1990||The Procter & Gamble Company||Absorbent article having elastic strands|
|US4904251 *||31 Mar 1988||27 Feb 1990||Uni-Charm Corporation||Disposable diaper|
|US4909802 *||16 Abr 1987||20 Mar 1990||The Procter & Gamble Company||Absorbent garment having a waist belt attachment system|
|US4909803 *||24 Feb 1989||20 Mar 1990||The Procter And Gamble Company||Disposable absorbent article having elasticized flaps provided with leakage resistant portions|
|US4990147 *||2 Sep 1988||5 Feb 1991||The Procter & Gamble Company||Absorbent article with elastic liner for waste material isolation|
|US5006394 *||23 Jun 1988||9 Abr 1991||The Procter & Gamble Company||Multilayer polymeric film|
|US5085654 *||22 Abr 1991||4 Feb 1992||The Procter & Gamble Company||Disposable garment with breathable leg cuffs|
|US5092861 *||24 Dic 1990||3 Mar 1992||Uni-Charm Corporation||Disposable garments|
|US5114420 *||20 Feb 1990||19 May 1992||Uni-Charm Corporation||Disposable diaper|
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|US5387209 *||13 Dic 1993||7 Feb 1995||Uni-Charm Corporation||Body fluid absorbent article|
|US5397316 *||25 Jun 1993||14 Mar 1995||The Procter & Gamble Company||Slitted absorbent members for aqueous body fluids formed of expandable absorbent materials|
|US5518801 *||28 Feb 1994||21 May 1996||The Procter & Gamble Company||Web materials exhibiting elastic-like behavior|
|US5607416 *||12 Oct 1994||4 Mar 1997||Uni-Charm Corporation||Disposable absorbent pad|
|US5607537 *||10 Oct 1995||4 Mar 1997||The Procter & Gamble Company||Method for making a flangeless seam for use in disposable articles|
|US5607760 *||3 Ago 1995||4 Mar 1997||The Procter & Gamble Company||Disposable absorbent article having a lotioned topsheet containing an emollient and a polyol polyester immobilizing agent|
|US5609587 *||3 Ago 1995||11 Mar 1997||The Procter & Gamble Company||Diaper having a lotioned topsheet comprising a liquid polyol polyester emollient and an immobilizing agent|
|US5622589 *||10 Oct 1995||22 Abr 1997||The Procter & Gamble Company||Method for making a flangeless seam for use in disposable articles|
|US5624424 *||21 Feb 1995||29 Abr 1997||New Oji Paper Co., Ltd.||Disposable diaper|
|US5625222 *||27 Jul 1994||29 Abr 1997||Fujitsu Limited||Semiconductor device in a resin package housed in a frame having high thermal conductivity|
|US5626571 *||30 Nov 1995||6 May 1997||The Procter & Gamble Company||Absorbent articles having soft, strong nonwoven component|
|US5723087 *||7 Ago 1996||3 Mar 1998||The Procter & Gamble Company||Web materials exhibiting elastic-like behavior|
|US5749866 *||27 Sep 1996||12 May 1998||The Procter & Gamble Company||Absorbent article with multiple zone structural elastic-like film web extensible waist feature|
|US5752947 *||13 Ene 1997||19 May 1998||Mcneil-Ppc, Inc.||Multiple folded side barrier for improved leakage protection|
|US5865823 *||6 Nov 1996||2 Feb 1999||The Procter & Gamble Company||Absorbent article having a breathable, fluid impervious backsheet|
|US5873868 *||5 Jun 1998||23 Feb 1999||The Procter & Gamble Company||Absorbent article having a topsheet that includes selectively openable and closable openings|
|US5876391 *||10 Oct 1996||2 Mar 1999||The Procter & Gamble Company||Absorbent article with structural elastic-like film web waist belt|
|US5891544 *||30 Sep 1997||6 Abr 1999||The Procter & Gamble Company||Web materials exhibiting elastic-like behavior|
|US5897545 *||2 Abr 1996||27 Abr 1999||The Procter & Gamble Company||Elastomeric side panel for use with convertible absorbent articles|
|US5904673 *||3 Dic 1996||18 May 1999||The Procter & Gamble Company||Absorbent article with structural elastic-like film web waist belt|
|US6022430 *||19 Jun 1998||8 Feb 2000||Kimberly-Clark Worldwide, Inc.||Method of making absorbent articles having an adjustable belt|
|US6022431 *||19 Jun 1998||8 Feb 2000||Kimberly-Clark Worldwide, Inc.||Method of making prefastened absorbent articles having a stretch band|
|US6042673 *||4 Mar 1998||28 Mar 2000||The Procter & Gamble Company||Method for making a flangeless seam for use in disposable articles|
|US6174302 *||25 Sep 1998||16 Ene 2001||Uni-Charm Corporation||Disposable diaper|
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|US6186996 *||8 Jul 1994||13 Feb 2001||Peaudouce||Disposable absorbent sanitary article|
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|US6238380 *||20 Abr 1999||29 May 2001||Uni-Charm Corporation||Disposable diaper|
|US6334858 *||11 Feb 1998||1 Ene 2002||Sca Molnlycke Ab||Diaper that includes a waist belt and an absorbent unit|
|US6350332 *||13 Ene 2000||26 Feb 2002||Bba Nonwovens Simpsonville, Inc.||Method of making a composite fabric for coverstock having separate liquid pervious and impervious regions|
|US6520947 *||6 Oct 1999||18 Feb 2003||The Procter & Gamble Company||Disposable absorbent article having reusable fastening means|
|US6524294 *||16 Ene 1997||25 Feb 2003||Avery Dennison Corporation||Z-fold diaper fastener|
|US6682515 *||17 Nov 2000||27 Ene 2004||Uni-Charm Corporation||Disposable absorbent sanitary article|
|US6689115 *||15 Ago 2000||10 Feb 2004||Kimberly-Clark Worldwide, Inc.||Absorbent garment with asymmetrical leg elastic spacing|
|US6726792 *||10 Dic 1999||27 Abr 2004||The Procter & Gamble Company||Method for making a seam for use in disposable articles|
|US6880211 *||23 Ene 2003||19 Abr 2005||3M Innovative Properties Company||Macro closure device for disposable articles|
|US7014632 *||15 May 2002||21 Mar 2006||Uni-Charm Corporation||Pants-type disposable wearing article|
|US7037299 *||28 Jul 2004||2 May 2006||First Quality Products, Inc.||Disposable elastic absorbent article having retaining enclosures|
|US7160281 *||21 Oct 2003||9 Ene 2007||Kimberly-Clark Worldwide, Inc.||Absorbent article having an absorbent structure secured to a stretchable component of the article|
|US20020045881 *||18 Sep 2001||18 Abr 2002||Liljana Kusibojoska||Absorbent article and a method for its manufacture|
|US20030088223 *||13 Abr 2001||8 May 2003||Kimberly-Clark Worldwide, Inc.||Passive bonds for personal care article|
|US20040022998 *||21 Jul 2003||5 Feb 2004||The Procter & Gamble Company||Fastening member comprising shaped tab|
|US20040082928 *||17 Oct 2003||29 Abr 2004||The Procter & Gamble Company||Absorbent article comprising an agent able to convey a perception to the wearer, without the need to create the external condition perceived|
|US20050004548 *||6 May 2004||6 Ene 2005||Toshifumi Otsubo||Pants-type disposable wearing article|
|US20050038401 *||13 Ago 2004||17 Feb 2005||Uni-Charm Corporation||Disposable diaper|
|US20050085784 *||21 Oct 2003||21 Abr 2005||Kimberly-Clark Worldwide, Inc.||Absorbent article having an absorbent structure secured to a stretchable component of the article|
|USH1440 *||7 Abr 1993||2 May 1995||New Nancy A||Fitted belt for absorbent garment|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US7695463||22 Jun 2005||13 Abr 2010||The Procter & Gamble Company||Disposable absorbent article having dual layer barrier cuff strips|
|US7737324||23 Nov 2005||15 Jun 2010||The Procter & Gamble Company||Disposable absorbent article having deployable chassis ears|
|US7763004||18 May 2005||27 Jul 2010||The Procter & Gamble Company||Disposable absorbent article having layered containment pockets|
|US7857801||23 Mar 2007||28 Dic 2010||The Procter & Gamble Company||Diaper having deployable chassis ears and stretch waistband|
|US8257335||31 Ene 2007||4 Sep 2012||The Procter & Gamble Company||Diaper having hip stretch panels|
|US8979815||10 Dic 2012||17 Mar 2015||The Procter & Gamble Company||Absorbent articles with channels|
|US9060904||18 Jun 2008||23 Jun 2015||The Procter & Gamble Company||Disposable absorbent article with sealed absorbent core with substantially continuously distributed absorbent particulate polymer material|
|US9066838||8 Jun 2012||30 Jun 2015||The Procter & Gamble Company||Disposable diaper having reduced absorbent core to backsheet gluing|
|US9072634||18 Jun 2008||7 Jul 2015||The Procter & Gamble Company||Disposable absorbent article with substantially continuously distributed absorbent particulate polymer material and method|
|US20150126947 *||4 Nov 2013||7 May 2015||Kimberly-Clark Worldwide, Inc.||Absorbent article having a fastening system adapted to enhance gasketing|
|WO2008093271A2 *||25 Ene 2008||7 Ago 2008||Procter & Gamble||Diaper having hip stretch panels|
|WO2010127064A1 *||29 Abr 2010||4 Nov 2010||The Procter & Gamble Company||Absorbent article comprising side sheets|
|Clasificación de EE.UU.||604/385.201, 604/385.28|
|Clasificación cooperativa||A61F13/49413, A61F13/49017, A61F13/53713, A61F2013/15121, A61F2013/530007, A61F2013/4512, A61F2013/530481, A61F2013/4948, A61F13/4946, A61F13/4942, A61F2013/587|
|Clasificación europea||A61F13/494A1, A61F13/494A1A|
|23 Ago 2005||AS||Assignment|
Owner name: THE PROCTER & GAMBLE COMPANY, OHIO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LAVON, GARY DEAN;SMITH, KEVIN MICHAEL;HAYDEN, MICHAEL PATRICK;REEL/FRAME:016658/0242
Effective date: 20050520