The present invention relates generally to the field of wearable absorbent articles having absorbent inserts and reusable outer covers, and more particularly, systems for combining the inserts into the outer covers.
It has long been known that absorbent articles (e.g., diapers, adult incontinence articles, feminine hygiene pads) offer the benefit of receiving and containing urine and/or other bodily exudates (e.g., feces, menses, mixture of feces and urine, mixture of menses and urine, etc.). It has been proposed to manufacture two-piece absorbent articles with a reusable outer cover and a detachable absorbent insert that may be reusable or disposable. In this way, the insert may be made with materials known to provide even more superior performance while minimizing the amount of waste as the whole article need not be disposed.
Unlike fully disposable absorbent articles, two-piece articles require the caregiver/user to properly place the insert into the outer cover. In some configurations, the absorbent insert is at least partially enclosed by the outer cover during use such that the absorbent insert is placed within the outer cover as opposed to merely joined to a surface of the outer cover. In some known configurations, an outer cover is provided with a laterally-extending opening, allowing the absorbent insert to be inserted into the outer cover. However, in configurations where the opening is provided proximate to a lateral end of the outer cover, the caregiver must push his or her hand through the length of the article to ensure the absorbent insert is properly positioned. This act requires the caregiver to uncomfortably insert his or her hand into the opening or try to place the insert through the outer cover. Alternatively, the manufacturer is required to provide an opening large enough to permit positioning by hand, which results in more material in the outer cover, unsightly bulges and/or an opening that may not fully secure the insert. It has also been proposed to include a laterally-extending opening in other portions of the outer cover, i.e. away from the outer cover's lateral end. In such configurations, however, the caregiver must avoid exudates when removing the absorbent insert.
Therefore, there is a need for an article design that permits coupling an absorbent insert with an outer cover in an efficient manner, particularly in designs that enclose the insert within the outer cover. There is also a need for an article design that maintains the insert in position with minimal effort. There is a further need for a design that minimizes contact with exudates when removing the absorbent insert.
The present disclosure comprises an outer cover comprising a front lateral end, a rear lateral end, and a length Lc extending in a longitudinal direction between the front and rear lateral ends. The outer cover also comprises a first longitudinal edge and a second longitudinal edge; and an opening. The opening may be disposed a maximum distance of 20 mm or less from the first longitudinal edge. The opening may be disposed generally evenly spaced between the first longitudinal edge and the second longitudinal edge of the outer cover, in other words generally coincident with a longitudinal axis of the outer cover. The opening comprises a maximum longitudinal length, Lo, that is at least 50% of the length of the outer cover, Lc; and the opening is adapted to receive an absorbent insert.
“Absorbent article” means a device that absorbs and contains body exudates and, more specifically, devices that are placed against or in proximity to the body of the wearer to absorb and contain the various exudates discharged from the body. Exemplary absorbent articles include diapers, training pants, pull-on pant-type diapers (i.e., a diaper having a pre-formed waist opening and leg openings such as illustrated in U.S. Pat. No. 6,120,487), refastenable diapers or pant-type diapers, incontinence briefs and undergarments, diaper holders and liners, feminine hygiene garments such as panty liners, absorbent inserts, and the like.
“Absorbent insert” and “insert” mean a component of a wearable absorbent article that is adapted to contain and/or absorb urine, feces, menses or any combination thereof, and is adapted to be installable and removable as a modular unit, from an outer cover. Herein, an absorbent insert may also be referred to as an “absorbent assembly”. The terms “absorbent insert,” “insert” and “absorbent assembly” may be used interchangeably herein.
“Disposed” refers to an element being located in a particular place or position. A feature that is disposed on a surface or side of a component may be integral with said component or may be joined to said component.
“Disposable”, when referring to an absorbent insert, means that the absorbent insert is not adapted or intended to be effectively sanitarily laundered in an ordinary household laundering process and ordinary household equipment, and thereby is ordinarily unsuitable for sanitary and effective reuse so as to provide as-new intended functions and performance, following soiling by exudates and removal from an outer cover. By way of non-limiting examples, effective laundering may be frustrated or prevented, causing the insert to be disposable, by inclusion of materials and/or construction: that do not retain their substantial as-new physical shape or structure through ordinary household laundering and drying so as to be effective as-new in reuse; that absorb aqueous liquids and cannot be sufficiently dried/dehydrated in ordinary household drying equipment and ordinary drying cycles so as to be effective as-new in reuse; that dissolve or substantially degrade in ordinary household laundering or drying, causing the insert to be substantially damaged or rendered useless; and/or that cannot be effectively cleaned of exudate material through ordinary laundering, so as to be sanitary and otherwise acceptable for re-use.
“Inboard,” with respect to a first feature of an article and its position relative a second feature or location on the article, means that the first feature lies closer to a respective axis of the article than the second feature or location, along a horizontal x-y plane approximately occupied by the article when laid out flat, extended to the full longitudinal and lateral dimensions of its component web materials against any contraction induced by any included pre-strained elastomeric material, on a horizontal surface. Laterally inboard means the first feature is closer to the longitudinal axis, and longitudinally inboard means the first feature is closer to the lateral axis. Conversely, “outboard,” with respect to a first feature of an article and its position relative a second feature or location on the article, means that the first feature lies farther from the respective axis of the article than the second feature or location.
“Joined” or “attached” means configurations whereby an element is directly secured to another element by affixing the element directly to the other element, and configurations whereby an element is indirectly secured to another element by affixing the element to intermediate member(s) that in turn are affixed to the other element.
“Longitudinal” means a direction lengthwise in a component such that the longitudinal direction runs parallel to the maximum linear dimension in the x-y plane of the component. In an absorbent article as described herein, the longitudinal direction runs substantially perpendicular from a waist end edge to an opposing waist end edge when the absorbent article is in a flat out, uncontracted state, or from a waist end edge to the bottom of the crotch in a bifolded article.
“Lateral” refers to a direction generally perpendicular to the longitudinal direction. In the absorbent article described herein, the lateral direction runs substantially parallel from a side edge to an opposing side edge.
“Outer cover” means a component of a wearable absorbent article that is adapted to be worn about the lower torso of a wearer, and is adapted to support an absorbent insert and hold the insert close to the wearer's body.
“Reusable”, when referring to a component means that the component is adapted to be used for its intended purpose after initial use without substantial destruction of any portions of the component necessary for as-new functionality. For example, a reusable outer cover means an outer cover that is adapted to permit removal of at least a first insert, and replacement thereof with at least a second insert, without substantial destruction of any portions of the outer cover that are necessary to provide the substantial as-new functionality of the outer cover, and without the necessity of any repair or reconstruction following such insert replacement.
In the in-use configuration, the outer cover may at least partially enclose the absorbent insert 30 as shown in
The outer cover, and article, comprises a front region 14, a rear region 18 and a crotch region 16 between the first and second waist regions.
Outer cover 20 and/or layers or portions thereof may be made of any durable or semi-durable knitted, woven or nonwoven textile or textile-like material that is appropriately compatible with skin of the intended wearer(s). Outer cover 20 may be formed of a single layer of a durable or semi-durable material, or may have two or more layers in the front region 14 and/or rear region 18. Suitable examples are described in U.S. applications Ser. Nos. 12/687,493; 12/687,412; 12/687,528; and 12/687,425 (all by Roe et al.). Non-limiting examples of fibers, nonwovens and laminates of nonwovens and films that might be considered for use as semi-durable outer cover materials may be found in U.S. Pat. Nos. 7,223,818; 7,211,531; 7,060,149; 6,964,720; 6,905,987; 6,890,872; 6,884,494; 6,878,647; and 5,518,801; and U.S. Published Applications Nos. 2008/0319407; 2008/0045917; 2007/0293111; 2007/0287983; 2007/0287348; 2007/0249254; 2007/0203301; and 2005/0164587.
The outer cover further comprises a first exterior surface 22 and a second exterior surface 28, which opposes the first exterior surface. One exterior surface will serve as the wearer-facing surface 9, and the other will serve as the garment-facing surface 8. In some embodiments, the exterior surfaces may be formed from the same materials. However, due to different functional needs of the garment-facing surface and the wearer-facing surfaces, it may be desirable that the exterior surfaces comprise different materials.
In nonlimiting examples, the wearer-facing surface of the outer cover may be formed from a first material or first combination of materials 24 (collectively referred to as “first material” hereinafter). The material selected may include hydrophilic fibers, or fibers treated to be hydrophilic. This may be desired in some circumstances to cause the material forming wearer-facing surface 9 to more readily absorb liquid, or transmit liquid therethrough. This may serve to provide supplemental absorbency within the outer cover for an event in which liquid exudates escape the insert, reducing the likelihood that the outer cover will leak. Alternatively, it may provide one way of communicating to the user that liquid exudates have escaped the insert, by causing wetness to be transmitted through to the outer cover such that wetness is sensed by the wearer and/or visible on exterior surfaces. Alternatively, it may serve to provide a layer that tends to draw moisture away from the skin, for a drier, more comfortable feel. Additionally, or alternatively, it may be desirable to form the wearer-facing surface from an apertured material to facilitate transfer of exudates through the wear-facing surface and onto the absorbent insert. In some nonlimiting examples, the material may include fibers having hydrophobic properties, providing enhanced liquid containment attributes to the wearer-facing layer.
The garment-facing surface of the outer cover may be formed by a second material 24, or a second combination of materials 26 (collectively referred to as “second material” hereinafter). The material selected may include fibers having hydrophobic properties, providing enhanced liquid containment attributes to such layer or may include a liquid impermeable material. In another example, however, it may be desirable in some circumstances for the selected material to include hydrophilic fibers, or fibers treated to be hydrophilic, so as will cause the material to more readily absorb liquid. This may serve to provide supplemental absorbency within the outer cover for the event in which liquid exudates escape the insert, or to provide one way of communicating to the user that liquid exudates have escaped the insert. Additionally, in some circumstances, it may be desirable that the material selected have soft tactile properties so as to have a pleasant feel that the user and/or wearer find attractive. The material also may be selected so as to have a desired appearance, including but not limited to coloration, sheen, and/or texture.
The first material 24 and the second material 26 may differ by one of the group consisting of: of texture, caliper, elasticity, opacity, water resistance, absorbency, breathability and combinations thereof.
In nonlimiting examples, the outer cover may be reversible such that both the first exterior surface and the second exterior surface are adapted to function as the wearer-facing surface and the garment-facing surface. This may provide, for example, variation in visible graphics or colors, textures and/or breathability against skin, liquid wicking properties and the like for the wearer.
Layers or other elements of the outer cover may be joined to each other via any suitable mechanism, including, for example, adhesives, mechanical bonding, ultrasonic bonding, sewing, stitching, serging, edging, and the like. In nonlimiting examples, the layers forming the first and second exterior surfaces may be joined together by a seam 29 as illustrated in
Referring again to
In alternative embodiments, the waist feature may be inelastic. In such configurations, the waist feature may provide additional anchoring about the waist of the wearer.
Additionally, or alternatively, the article may comprise a leg gasketing system 54, portions of which may be formed by the outer cover and/or the absorbent insert. The outer cover may include one or more elastic elements 52, such as films or elastic strands, extending through all or a portion of the leg opening 51 to form a leg band portion 56. The elastic elements may be laminated with one or more nonwoven layers and/or one or more textile layers. The elastic elements may be laminated between the first and second materials 24, 26 described above. As described with respect to the waist feature, the leg band portion may include rugosities as result of the lamination process. In other nonlimiting examples, the leg band portion may be a zero strain, activated laminate. In further nonlimiting examples, materials (e.g., materials 24 and/or 26) are joined around the elastic element, at least partially enclosing the elastic element, but are not joined to the elastic elements. In some embodiments, elastic elements are affixed within the outer cover only at or near one or both of their respective ends, e.g., within a pouch, tube or envelope structure formed of outer cover material—referred to herein as a “drawstring elastic”.
The waist features and/or leg band portions may be disposed along the edge of the outer cover, and in some circumstances, it may be desired to have elasticized waist and leg band portions situated along substantially the entire length of the leg and/or waist openings so as substantially or completely encircle the wearer's legs and/or waist while outer cover 20 is worn. The gathered material within rugosities can serve to accommodate stretching of waist feature and leg band portions. This arrangement not only may provide for better fit about the wearer's legs, but also may enable the outer cover 20, when formed of appropriately sized and shaped material, to form a pouch-like structure 53 in the crotch region (see
The outer cover may include ears 70 in one or both of the front and rear regions. As shown in
The outer cover may also comprise one or more insert components of an insert-to-outer cover fastening system. The outer cover may comprise fastening components capable of operatively engaging with an insert receiving component disposed on the absorbent insert, and/or may comprise receiving component(s) 1121 capable of operatively engaging with an insert fastening component 110I disposed on the absorbent insert as shown in
As noted above, in the in-use configuration of the present invention, the outer cover at least partially encloses the absorbent insert 30 as shown in
The outer cover comprises one or more openings 40 which are capable of receiving an absorbent insert 30, as shown in
The one or more openings includes at least one longitudinally-extending opening 42. By longitudinally-extending, it is meant that the opening extends more in the longitudinal dimension than in the lateral dimension. For purposes of longitudinally-extending, the longitudinal direction includes directions within 40 degrees of the maximum linear dimension in the x-y plane of the outer cover.
The longitudinally-extending opening 42 may be present in the crotch region 16 as shown in
Turning to
In embodiments having a leg band 56, the first edge 44 may be disposed a maximum distance of about 15 mm or less, or about 10 mm or less, or about 5 mm or less, or from about 2 mm to about 15 mm, or from about 5 mm to about 10 mm, from an inboard edge 58 of the leg band, reciting for each range every 0.5 mm increment therein. The inboard edge 58 of the leg band may be defined by a bond or series of bonds that enclose the elastic material 52. The first edge 44 may be coincident with the inboard edge 58.
As shown in
Regardless of the placement of the opening 40 on the outer cover 20, an opening 40 may be provided on the wearer-facing surface 9 and/or on the garment-facing surface 8. In embodiments where the outer cover is formed from multiple materials 24, 26 as described above, the opening may be disposed in the first material and/or the second material. In nonlimiting examples, one or more openings are formed in the first material 24 and the second material 26 is devoid of openings. In other nonlimiting examples, one or more openings are formed in the second material 26 and the first material 24 is void of openings. As shown in
The outer cover 20 of the present disclosure may comprise a wearer-facing surface 9 formed from a first combination of materials 24. Additionally, or instead, the outer cover 20 may comprise a garment-facing surface 8 formed from a second combination of materials 26. A portion of a first material of the first and/or second combination of materials 24/26 may form the first edge 44 of the opening 40. A portion of a second material of the first and/or second combination of materials 24/26 may form the second edge 46 of the opening 40. At least a portion of the first material of the first combination of materials 24 may at least partially overlap at least a portion of the second material of the first combination of materials 24. Likewise, at least a portion of the first material of the second combination of materials 26 may at least partially overlap at least a portion of the second material of the second combination of materials 26. At least a portion of this overlap may form the opening 40.
The opening 40 may be sized and shaped such that the absorbent insert 30 will remain in the pocket once inserted. For example, the opening may be smaller in one or more dimensions than the insert. Additionally, or alternatively, the second edge 46 may be spaced from the first edge 44 such that less than 10 mm of void space in the z-direction exists above or below the absorbent insert within the pocket.
The opening may be sealable, such that it may be closed or repeatedly opened and reclosed. In nonlimiting examples, the first edge 44 and/or the second edge 46 may include means for attaching to each other, including any of the fastening components and/or receiving components described above, as well as pressure sensitive adhesive. Additionally, or alternatively, the first 44 or second edge 46 may be capable of wrapping about the longitudinal edge and being secured to an exterior surface.
Additionally, or alternatively, opening may be pre-sealed, such that it is opened prior to initial use. One benefit of this construction is that the user may determine whether he or she wants to utilize the opening, particularly in embodiments where the insert may be inserted through other openings or may be disposed on the wearer-facing surface of the article. Another benefit is that the interior of the outer cover may be protected from dust, moisture or other environmental effects prior to use. The pre-seal may be created in the same means described above in relation to a sealable opening. Additionally, or alternatively, the pre-seal may be made by stitching.
Turning to
In some nonlimiting examples, the outer cover may include a second longitudinally-extending opening 42a. The second longitudinally-extending opening may have any of the features discussed above with respect to the longitudinally-extending opening. By way of nonlimiting example, the second longitudinally-extending opening may have a maximum longitudinal length that is at least 50% of the length of the outer cover. The second longitudinally-extending opening may be positioned proximate to an opposing longitudinal edge (i.e., if the first opening 42 is proximate to the first longitudinal edge 15, then the second opening 42a may be proximate to the second longitudinal edge). Additionally, or alternatively, the outer cover may comprise a laterally-extending opening 47. The laterally-extending may have a lateral dimension that is greater than its longitudinal dimension. A laterally-extending opening may be disposed proximate to a waist edge 13, 19, as shown in
Returning to
The longitudinal edges 36, 37 may be generally parallel to the longitudinal axis. Alternatively, the longitudinal edges 36, 37 may be curved, such as in an hour-glass configuration. Thus, the width of the insert, Wi, may vary. In nonlimiting examples, the width of the insert, Wi, is less than the width of the outer cover, Wcv, at one or more longitudinal positions. The width of the insert, Wi, may be less than the width of the outer cover, Wcv, throughout the length of the insert.
The insert also may include one or more grasp structures 63. The grasp structures may be provided to enable the user to quickly and easily grasp the insert, handle the insert during application and/or properly place the insert. For instance, in embodiments with more than one opening, the grasp structure(s) may be used to more easily pull or otherwise position the absorbent insert through or using an opening after inserting it through another opening. In certain embodiments, the grasp structure may have a different tactile feel than surrounding or adjacent areas to distinguish the area and ease the user's identification of the grasp structures.
The absorbent insert may be made of washable material such as cloth, or of a material suitable for composting, such as cellulose. In other embodiments, the absorbent insert may be disposable an made from materials commonly found in disposable absorbent articles.
As shown in
The topsheet 32 is generally a portion of the insert 30 that may be positioned at least in partial contact or close proximity to a wearer. Suitable topsheets 32 may be manufactured from a wide range of materials, such as porous foams; reticulated foams; apertured plastic films; or woven or nonwoven webs of natural fibers (e.g., wood or cotton fibers), synthetic fibers (e.g., polyester or polypropylene fibers), or a combination of natural and synthetic fibers. The topsheet 32 is generally supple, soft feeling, and non-irritating to a wearer's skin. Generally, at least a portion of the topsheet 32 is liquid pervious, permitting liquid to readily penetrate through the thickness of the topsheet 32. The topsheet 32 may comprise one or more apertures.
Any portion of the topsheet 32 may be coated with a lotion, antibacterial or skin care composition as is known in the art. The topsheet 32 may be fully or partially elasticized or may be foreshortened so as to provide a void space between the topsheet 32 and the core 64.
Topsheet 32, backsheet 34 or any portion of the topsheet or backsheet may be embossed and/or matte finished to provide a more cloth-like appearance.
Backsheet 34 is generally the outer liner portion of insert 30 forming the garment-facing surface 64 thereof, and prevents the exudates absorbed and contained within insert 30 from wicking through and soiling the outer cover. The backsheet 34 may comprise one or more nonwovens, films, elastomeric films, foams, strands, or combinations of these or other suitable materials with nonwovens or synthetic films. In nonlimiting examples, the backsheet is a laminate of an elastomeric material, such as a film, and a nonwoven.
In various embodiments, the backsheet 34 is substantially water-impermeable. Suitable backsheet 34 materials include nonwovens and/or films. Other suitable backsheet 34 materials may include breathable materials that permit vapors to escape from the insert 30 while still preventing exudates from passing through the backsheet 34. Exemplary breathable materials may include materials such as woven webs, nonwoven webs, composite materials such as film-coated nonwoven webs, and microporous films.
In certain embodiments, the backsheet 34 may have a water vapor transmission rate (WVTR) of greater than about 2000 g/24 h/m2, greater than about 3000 g/24 h/m2, greater than about 5000 g/24 h/m2, greater than about 6000 g/24 h/m2, greater than about 7000 g/24 h/m2, greater than about 8000 g/24 h/m2, greater than about 9000 g/24 h/m2, greater than about 10000 g/24 h/m2, greater than about 11000 g/24 h/m2, greater than about 12000 g/24 h/m2, greater than about 15000 g/24 h/m2, measured according to WSP 70.5 (08) at 37.8° C. and 60% Relative Humidity. A higher WVTR may be desired in this particular application, since the insert backsheet 34 will not form the outer surface of the wearable article, as a conventional disposable diaper backsheet would, but rather, will be covered by the one or more layers of the outer cover material(s)—which themselves may act in some circumstances to reduce WVTR of the composite structure.
Other suitable materials and/or manufacturing techniques may be used to provide a suitable backsheet 34 including, but not limited to, surface treatments, particular film selections and processing, particular filament selections and processing.
Backsheet 34 may be joined to topsheet 32, absorbent core 64 or any other element of insert 30 by any suitable attachment mechanism known in the art. For example, the attachment mechanism may include a continuous line or layer of adhesive, a patterned layer of adhesive, or an array of separate lines, spirals, or spots of adhesive. One example of an attachment mechanism comprises an open pattern network of filaments of adhesive as disclosed in U.S. Pat. No. 4,573,986. Other suitable attachment mechanisms include several lines of adhesive filaments which are swirled into a spiral pattern, as is illustrated by the apparatus and methods shown in U.S. Pat. Nos. 3,911,173; 4,785,996; and 4,842,666. Adhesives which have been found to be satisfactory are manufactured by H. B. Fuller Company of St. Paul, Minn. and marketed as HL-1620 and HL 1358-XZP. Alternatively, the attachment mechanism may comprise heat bonds, pressure bonds, ultrasonic bonds, dynamic mechanical bonds, stitches or any other suitable attachment mechanisms or combinations of these attachment mechanisms known in the art.
It will be appreciated that the outer cover described above can be constructed of materials and construction so as to bear and sustain a majority of the structural loading generally imposed upon a disposable diaper, by stretching and accommodation of the wearer's anatomical features and body movements, and by absorption, swelling and added weight resulting from the wearer's exudations of waste. Thus, lesser requirements for structural strength of an insert might be present with use of such an outer cover, as compared with strength required of inside components of a disposable diaper. Therefore, an article such as described herein may include a disposable absorbent insert manufactured from materials that are different from those ordinarily used in the manufacture of disposable diapers, such as petroleum-derived materials, e.g., polyethylene and polypropylene. For example, a disposable absorbent insert having one or more of a topsheet, backsheet, standing cuffs and/or other components formed of products of wood, cotton, flax (linen), hemp, bamboo, or other cellulose fibers (e.g., paper), in addition to the materials identified above, is contemplated. If resistance to aqueous liquid penetration or substantial liquid impermeability is desired, e.g., for a backsheet and/or standing cuffs, a material formed of ordinarily hydrophilic fibers such as paper may be coated or impregnated with a hydrophobic material, such as a skin-compatible oil or wax, to impart the desired resistance to aqueous liquid penetration. Each of the materials forming the insert may be selected so as to be dispersible in water or an aqueous solution, flushable, biodegradable and/or compostable (preferably to an agriculturally usable humus or soil amendment).
Turning to
Alternatively, the absorbent core 64 may comprise a wide variety of liquid-absorbent materials 65 commonly used in disposable diapers and other absorbent articles. Examples of suitable absorbent materials include comminuted wood pulp, which is generally referred to as air felt creped cellulose wadding; melt blown polymers, including co-form; chemically stiffened, modified or cross-linked cellulosic fibers; tissue, including tissue wraps and tissue laminates; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials (AGM); or any other known absorbent material or combinations of materials. The absorbent core may have an absorbent capacity of at least about 120 g, or at least about 150 g, or at least about 200 g, or from about 120 to about 300 g, reciting for said range every 10 increment therein, as determined by the Core Capacity Test Method herein.
In some embodiments, the core is void of superabsorbent polymers and/or absorbent gelling materials. In other embodiments, at least a portion of the absorbent core is substantially cellulose free and contains less than 10% by weight cellulosic fibers, less than 5% cellulosic fibers, less than 1% cellulosic fibers, no more than an immaterial amount of cellulosic fibers or no cellulosic fibers. It should be understood that an immaterial amount of cellulosic material does not materially affect at least one of the thinness, flexibility, and absorbency of the portion of the absorbent core that is substantially cellulose free. Among other benefits, it is believed that when at least a portion of the absorbent core is substantially cellulose free, this portion of the absorbent core is significantly thinner and more flexible than a similar absorbent core that includes more than 10% by weight of cellulosic fibers. The amount of absorbent material, such as absorbent particulate polymer material 65a present in the absorbent core may vary, but in certain embodiments, is present in the absorbent core in an amount greater than about 80%, or greater than about 85%, or greater than about 90%, or greater than about 95% by weight of the core. In nonlimiting examples, a thermoplastic material, such as a thermoplastic adhesive composition 66, may be used to immobilize superabsorbent particles on a substrate (e.g., the topsheet, backsheet or core wrap).
In some embodiments, as shown in
The absorbent core 64 may include a core wrap 68, comprising one or more substrates 69 to encloses the absorbent material 65. Where channels are present, the core wrap may be bonded within one or more channels, thereby providing permanent channels which maintain their channel structure in the wet state.
The absorbent core 64 may be manufactured in a wide variety of sizes and shapes (e.g., rectangular, hourglass, “T”-shaped, etc.). The configuration and construction of absorbent core 64 may also be varied (e.g., the absorbent core(s) or other absorbent structure(s) may have varying caliper zones, hydrophilic gradient(s), a superabsorbent gradient(s), or lower average density and lower average basis weight acquisition zones; or may comprise one or more layers or structures).
Referring to
As noted above, the article 10 may comprise a leg gasketing system 50, portions of which may be formed by the insert 30. Such portions may be exposed through an opening 40 in the outer cover when the absorbent insert is in the in-use configuration. Returning to
The standing leg cuffs may be integral with the topsheet 32 or the backsheet 34 or may be a separate material joined to the topsheet and/or backsheet. Each standing leg cuff 82 may comprise one, two or more elastic elements 52 close to the free terminal edge 84 to provide a better seal. The standing cuff may be formed of any of a variety of substrates such as plastic films and woven or nonwoven webs of natural fibers (e.g., wood or cotton fibers), synthetic fibers (e.g., polyester or polypropylene fibers), or a combination of natural and synthetic fibers. In certain embodiments, the standing cuffs may be formed of a substantially liquid impermeable web to contain and isolate liquid exudates from the outer cover, outer clothing and environment of the wearer and/or may be formed of a vapor permeable web for breathability of the insert and article.
Referring to
Components of the disposable absorbent article can at least partially be comprised of bio-sourced content as described in U.S. Pat. Pub. Nos. 2007/0219521A1, 2011/0139658A1, 2011/0139657A1, 2011/0152812A1, and 2011/0139659A1. These components include, but are not limited to, topsheets, backsheet films, backsheet nonwovens, side panels, leg gasketing systems, superabsorbent, acquisition layers, core wrap materials, adhesives, outer covers, fastener systems, and landing zones. In at least one embodiment, a disposable absorbent article component comprises a bio-based content value from about 10% to about 100%, or from about 25% to about 75%, or from about 50% to about 60% using ASTM D6866-10, method B. In order to apply the methodology of ASTM D6866-10 to determine the bio-based content of any component, a representative sample of the component must be obtained for testing. In at least one embodiment, the disposable absorbent article component can be ground into particulates less than about 20 mesh using known grinding methods (e.g., WILEY® mill), and a representative sample of suitable mass taken from the randomly mixed particles.
The following aspects of the disclosure are exemplary only and not intended to limit the scope of the disclosure.
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.”
Every document cited herein, including any cross referenced or related patent or application and any patent application or patent to which this application claims priority or benefit thereof, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.
While particular embodiments 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. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
This application claims the benefit of U.S. Provisional Application No. 63/080,864, filed Sep. 21, 2020, which is incorporated herein by reference in its entirety.
Number | Date | Country | |
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63080864 | Sep 2020 | US |