WO2010083287A1 - Two-piece wearable absorbent article - Google Patents
Two-piece wearable absorbent article Download PDFInfo
- Publication number
- WO2010083287A1 WO2010083287A1 PCT/US2010/021010 US2010021010W WO2010083287A1 WO 2010083287 A1 WO2010083287 A1 WO 2010083287A1 US 2010021010 W US2010021010 W US 2010021010W WO 2010083287 A1 WO2010083287 A1 WO 2010083287A1
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- WO
- WIPO (PCT)
- Prior art keywords
- insert
- outer cover
- region
- wearer
- article
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/66—Garments, holders or supports not integral with absorbent pads
- A61F13/74—Garments, holders or supports not integral with absorbent pads having means to retain absorbent pads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
- A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
- A61F13/4752—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means being an upstanding barrier
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/49003—Reusable, washable fabric diapers
- A61F13/49004—Reusable, washable fabric diapers with fastening means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/505—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with separable parts, e.g. combination of disposable and reusable parts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
- A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
- A61F2013/51441—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material
- A61F2013/51449—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material being knitted or woven fabrics
Definitions
- Fig. 2C is a plan view of an outer cover opened and laid flat, inner surface facing the viewer;
- Fig. 2F is a plan view of an outer cover opened and laid flat, inner surface facing the viewer; next to a plan view of an insert opened and laid flat, outer (garment-facing) surface facing the viewer;
- Fig. 5A is a cross sectional view of an example of an insert such as shown in Fig. 4, taken at line 5A-5A in Fig. 4;
- Fig. 5B is a cross sectional view of an example of an insert such as shown in Fig. 4, taken along line 5B-5B in Fig. 4;
- Fig. 5C is a cross sectional view of another example of an insert such as shown in Fig. 4, taken along line 5C-5C in Fig. 4;
- Fig. 5E is a cross sectional view of another example of an insert such as shown in Fig. 4, taken along line 5E-5E in Fig. 4;
- Fig. 5F is a cross sectional view of another example of an insert such as shown in Fig. 4, taken along line 5F-5F in Fig. 4;
- Fig. 10 is a front view of an upper fixture used on a constant rate of extension tensile tester for use in the Bending Stiffness Measurement Method herein;
- 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.
- 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 next to the wearer's body.
- an outer cover may also be referred to as a “chassis”.
- the terms “outer cover” and “chassis” are interchangeable for purposes herein.
- Reusable when referring to an 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 components 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.
- “Wearable absorbent article” means any article designed to be worn about the lower torso and to contain and/or absorb urine, feces, menses or any combination thereof.
- “Wearable absorbent article” includes but is not limited to baby or children's diapers (of the "tape”- fastenable, otherwise fastenable, “pull-up” or any other variety), training pants and adult incontinence pants, briefs and the like.
- Fig. 1 depicts an example of a wearable absorbent article 10 having certain features, as it might appear while being worn by a wearer.
- Wearable absorbent article 10 may include an outer cover 20, having front waist edge 21, rear waist edge 22, and a pair of leg opening edges 23.
- Fig. 3 depicts a disposable absorbent insert 50 that may form an inner component of the wearable absorbent article 10, shown in perspective view as it might appear in a free-standing, relaxed state, apart from outer cover 20.
- Insert 50 may be designed to contain and/or absorb body exudates, and may be made of pliable materials as will be described further below.
- Insert 10 has forward region 54 and rearward region 55, and may include front fastener component 56 and rear fastener component 57.
- Insert 10 may include a body-facing liner or topsheet 51, outer liner or backsheet 52, and a pair of standing cuffs 53. Referring to Fig.
- insert 50 will have a length L from the forwardmost portion of forward region 54 to the rearwardmost portion of rearward region 55, and an insert lateral axis 70 equally dividing this length.
- forward region 54 is forward of insert lateral axis 70
- rearward region 55 is rearward of insert lateral axis 70.
- wearable absorbent article 10 may be placed on a wearer by wrapping outer cover 20 between the wearer's legs and under the buttocks such that crotch region 26 is between the wearer's legs, bringing front waist edge 21 and rear waist edge 22 into the positions approximately as shown in Fig. 1, and then securing fastening ears 29 to front region 27, thereby forming a pant-like garment about the wearer as suggested in Fig. 1.
- Semi-durable outer cover materials may include any natural or synthetic nonwoven web and/or film materials known in the diaper or pant arts.
- Semi-durable materials of which outer cover 20 may be constructed may include non-woven web materials of polypropylene and/or polyethylene fibers, polyester fibers, and any other synthetic fibers used to form nonwoven web materials used as components of disposable diapers, and blends thereof. Natural fibers such as cotton, linen, wool, bamboo, hemp, silk, rayon, and the like may be blended with synthetic fibers to form such a nonwoven web suitable as a component layer of outer cover 20.
- the material predominately forming the inner surface of rear region 28 may be selected primarily for its elasticity features, which may better serve to provide snug fit about wearer body contours and accommodate wearer movement (i.e., about the buttocks and hips).
- the material predominately forming the inner surface of front region 27 and/or crotch region 26 might be selected primarily for its hydrophobicity or hydrophilicity, which may better serve to contain liquid exudates.
- waist band portions 34, 35 and leg band portions 36 may be elasticized in the manner described above, or by other mechanisms.
- elasticized band/strip material such as that used to form elastic waistbands and leg bands or other banding features of conventional cloth underwear, briefs or other articles of clothing may be separately produced, and affixed to the materials forming outer cover 20 in any suitable manner, during the manufacture thereof.
- An anchoring band, or system of one or more anchoring band members may have any additional features described in, for example, co-pending U.S. Patent Applications Serial Nos. 11/810,741; 11/810,708; 12/101,476; 12/028,317; 11/810,745; 11/810,742; 11/810,734; 11/810,779; 11/810,715; 11/810,733; 11/810,736; 11/810,777; and 11/599,862; 11/810,901 and 11/599,851; 11/899,812; 12/204,844; 12/204,849; 12/204,854; 12/204,858; and 12/204,864; 11/899,810; 11/899,656; and 11/899,811; 11/899,812; 12/204,844; 12/204,849; 12/204,854;
- outer cover 20 In order to enhance and/or maximize fit, wearer comfort and appearance of the outer cover 20, it may be desirable to fashion outer cover 20 so as to accommodate anatomical contours and body movements of the intended wearer.
- outer cover 20 may have differing shape and/or greater material surface area in the rear region 28 than in the front region 27.
- Human anatomy in the lower torso/hip/thigh region is asymmetric about the lateral plane of the body, i.e., the geometry of the front of the human body is different than that of the back.
- the outer cover geometry and functionality, including stretch properties may be adapted accordingly.
- Differing shape and/or greater material surface area in the rear region may serve to better cover the buttocks through movements of the wearer (including sitting and/or bending forward at the hips), while lesser material surface area in the front region may serve to avoid material bunching and/or an ill- fitting appearance, particularly when the wearer is in positions including sitting and/or bending forward at the hips.
- the outer cover may be asymmetric in shape or surface area across outer cover lateral axis 45.
- outer cover asymmetry across outer cover lateral axis 45 is a result of design and construction of the outer cover so as to have only one front region and only one rear region, i.e., the front and rear regions are not interchangeable, if the fit, comfort, performance and appearance of outer cover 20 are to be optimal.
- Topsheet 51 may be formed of a liquid-permeable nonwoven web material. It may be desired that material forming topsheet 51 is compliant, soft-feeling, and non- irritating to the wearer's skin. It may be desired that at least a portion of topsheet 51 may be liquid pervious, permitting liquids to readily penetrate through its thickness.
- a suitable topsheet may be manufactured from a wide range of materials, such as porous foams, reticulated foams, apertured plastic films, or woven or nonwoven materials 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. If topsheet 51 includes fibers, the fibers may be spunbond, carded, wet-laid, meltblown, hydroentangled, or otherwise processed as is known in the art.
- Suitable material comprising a nonwoven web of staple-length polypropylene fibers is manufactured by Veratec, Inc., a Division of International Paper Company, of Walpole, MA under the designation P-8. Additional suitable materials comprising formed films are described in U.S. Patents Nos. 3,929,135; 4,324,246; 4,342,314; 4,463,045; and 5,006,394.
- Other suitable topsheets 30 may be made in accordance with U.S. Patents Nos. 4,609,518 and 4,629,643.
- Suitable examples of formed and/or apertured films may include products produced by The Procter & Gamble Company of Cincinnati, Ohio as DRI-WEAVE, and by Tredegar Corporation, based in Richmond, VA, as FRESHFEEL.
- Suitable topsheet materials also may include laminates of films and nonwoven webs produced by Tredegar as COMFORTFEEL, COMFORTQUILT, SOFTQUILT and COMFORTAIRE.
- topsheet 51 is made of a hydrophobic material or is treated to be hydrophobic in order to isolate the wearer's skin from liquids contained in absorbent core 71. If topsheet 51 is generally made of a hydrophobic material, it may be desired that at least a portion of the upper surface of topsheet 51 is treated to be hydrophilic so that liquids will transfer through the topsheet more rapidly.
- Topsheet 51 can be rendered hydrophilic by treating it with a surfactant or by incorporating a surfactant into the topsheet. Suitable methods for treating topsheet 51 with a surfactant include spraying the topsheet material with the surfactant and/or immersing the material into the surfactant.
- the apertures be large enough to allow the penetration of aqueous fluids like urine without significant resistance otherwise attributable to hydrophobicity. It may also be desired that the apertures have sufficient effective open area and/or aperture size to allow the penetration of low-viscosity fecal material. Examples of topsheets meeting these requirements are described in U.S. Pat. Nos. 5,342,338; 6,414,215; and 6,010,491.
- Topsheet 51 may also include or be treated with antibacterial agents, some examples of which are disclosed in U.S. Application Ser. No. 08/212,441, published as U.S. Statutory Invention Registration H1732.
- Topsheet 51, backsheet 52 or any portion of the topsheet or backsheet may be embossed and/or matte finished to provide a more cloth-like appearance.
- Backsheet 52 is generally that outer liner portion of insert 50 forming the garment-facing surface thereof, and prevents the exudates absorbed and contained within insert 50 from wicking through and soiling the outer cover. In some circumstances it may be desired that backsheet 52 is substantially impervious to liquids.
- Backsheet 52 may be formed of a film, a nonwoven, or a laminate of a film and a nonwoven.
- Backsheet 52 may be formed of a substantially liquid-impermeable laminate or composite of film and non-woven web.
- Backsheet 52 may be formed of a substantially liquid impermeable nonwoven web, or laminate of nonwoven web and substantially liquid impermeable film, so as to contain and isolate liquid exudates from the outer cover, outer clothing and/or environment of the wearer.
- the backsheet may have a water vapor transmission rate (WVTR) of greater than about 2000 g/24h/m 2 , greater than about 3000 g/24h/m 2 , greater than about 5000 g/24h/m 2 , greater than about 6000 g/24h/m 2 , greater than about 7000 g/24h/m 2 , greater than about 8000 g/24h/m 2 , greater than about 9000 g/24h/m 2 , greater than about 10000 g/24h/m 2 , greater than about 11000 g/24h/m 2 , greater than about 12000 g/24h/m 2 , greater than about 15000 g/24h/m 2 , measured according to WSP 70.5 (08) at 37.8 0 C and 60% Relative Humidity.
- WSP 70.5 (08) at 37.8 0 C and 60% Relative Humidity
- Backsheet 52 may be joined to topsheet 51, absorbent core 71 or any other element of insert 50 by any suitable attachment mechanism known in the art.
- 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.
- an attachment mechanism comprises an open pattern network of filaments of adhesive as disclosed in U.S. Patent No. 4,573,986.
- 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. Patents 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, Minnesota and marketed as HL-1620 and HL-1358-XZP.
- the attachment mechanism may comprise heat bonds, pressure bonds, ultrasonic bonds, dynamic mechanical bonds, or any other suitable attachment mechanisms or combinations of these attachment mechanisms known in the art.
- 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.
- 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.
- 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.
- 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).
- insert 50 may have an absorbent core 71 within the envelope-like structure formed by topsheet 51 and backsheet 52.
- Absorbent core 71 may comprise any absorbent material which is generally compressible, conformable, non-irritating to the wearer's skin, and capable of absorbing and retaining liquids such as urine and other certain body exudates.
- Absorbent core 71 may comprise a wide variety of liquid-absorbent materials commonly used in disposable diapers and other absorbent articles such as comminuted wood pulp, which is generally referred to as airfelt.
- absorbent materials include creped cellulose wadding; meltblown polymers, including coform; chemically stiffened, modified or cross-linked cellulosic fibers; tissue, including tissue wraps and tissue laminates; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or any other known absorbent material or combinations of materials.
- Absorbent core 71 may include liquid acquisition/distribution material 65, and storage material 66.
- acquisition/distribution material 65 may have comparatively rapid absorption and wicking properties, but also may have limited absorption capacity.
- storage material 66 may have comparatively slower absorption and wicking properties, but also may have greater absorption capacity.
- acquisition/distribution material 65 may serve to rapidly absorb and distribute gushes of liquid such as urine, while storage material 66, having greater absorption capacity, may serve to absorb such liquid from the acquisition/distribution material and store it for the time needed until the insert may be replaced.
- Absorbent core 71 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 71 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). Examples of absorbent structures for use as absorbent core 71 may include those described in U.S. Patents Nos. 4,610,678; 4,673,402; 4,834,735; 4,888,231; 5,137,537; 5,147,345; 5,342,338; 5,260,345; 5,387,207; and 5,625,222.
- Airfelt and other cellulose fiber have been used as absorbent fillers in absorbent cores of disposable diapers. Such fiber possesses absorbent properties and imparts some absorption capacity to an absorbent core, but also is included to provide a structural matrix to hold dispersed particles of superabsorbent polymer and/or absorbent gelling material. While inclusion of such particles enhances absorption capacity, keeping such particles suitably dispersed may be important to prevent the particles from "gel- blocking" in use as they swell with absorbed liquid, causing loss of absorption capacity.
- the inclusion of airfelt or other cellulose fiber as a matrix for superabsorbent particles can serve to reduce or prevent gel-blocking. However, it also imparts bulk to an absorbent core, even before absorption of any liquids.
- an absorbent core 71 having a portion that is substantially airfelt-free may be disposed between the topsheet 51 and the backsheet 52.
- the core 71 may include a layer formed at least in part of a substrate, distributed absorbent particles 66 of a superabsorbent polymer or absorbent gelling material, and a thermoplastic adhesive composition capturing the distributed absorbent particles 66 and adhering to at least portions of the substrate, thereby immobilizing the absorbent particles 66 on or proximate to, and relative to, the substrate.
- an outer cover 20 as described herein provide for a wearable absorbent article that has a relatively improved, garment-like (or underwear-like) fit, comfort and appearance (as an outer garment or under other clothes), as compared with many types of wholly disposable diapers currently available. If an outer cover 20 having such attributes is used with an insert 50 having an absorbent core 71 incorporating substantial amounts of airfelt or other cellulose fiber, the improved, garment- like fit, comfort and appearance provided by the outer cover 20 may be compromised by the bulkiness of the insert.
- absorbent core 71 of insert 50 may be desirable to construct absorbent core 71 of insert 50 with features as described in one or more of patent applications cited immediately above, which provide for a relatively thin absorbent core.
- the substantially airfelt- free core may generally be more flexible than an absorbent core containing substantial amounts of airfelt or other cellulose fiber. This enhanced flexibility may enable the core and the associated insert to better conform about the wearer's body when in use, providing for improved comfort and less bulky appearance of the wearable article 10.
- the substantially airfelt-free core reduces the amount of materials consumed in manufacturing, reduces the amount of space (and in some circumstances, weight) per unit which must be packaged and shipped, conserving resources in that regard, and reduces the amount of materials and bulk which must be disposed of in connection with disposing of a used/soiled insert.
- Suitable materials for use as the sublayer may include large cell open foams, macro- porous compression resistant nonwoven highlofts, large size particulate forms of open and closed cell foams (macro and/or microporous), highloft nonwovens, polyolefin, polystyrene, polyurethane foams or particles, structures comprising a multiplicity of vertically oriented looped strands of fibers, absorbent core structures described above having punched holes or depressions, and the like.
- One example of a sublayer includes a mechanical fastening loop landing element, having an uncompressed thickness of about 1.5 millimeters available as XPL-7124 from the 3M Corporation of Minneapolis, Minnesota.
- Another example includes a 6 denier, crimped and resin-bonded nonwoven highloft having a basis weight of 110 grams per square meter and an uncompressed thickness of 7.9 millimeters which is available from the Glit Company of Wrens, Georgia.
- Other suitable absorbent and nonabsorbent sublayers are described in U.S. Patents Nos. 6,680,422 and 5,941,864. Further, the sublayer, or any portion thereof, may include or be coated with a lotion or other known substances to add, enhance or change the performance or other characteristics of the element.
- Insert 50 also may have a pair of longitudinal standing cuffs 53 attached partially or entirely along the length thereof.
- Suitable longitudinal standing cuffs in various published examples identified as “leg cuffs”, “barrier cuffs” “gasketing cuffs,” etc., may be formed of materials and construction such as described in, but not limited to,
- An aperture may have an area of between about 10 cm 2 and about 50 cm 2 . In some circumstances it may be desired that an aperture has an area of between about 15 cm 2 and 35 cm 2 .
- absorbent material 66 in forward region 54 may be, respectively, dispersed within acquisition/distribution material 65 (Fig. 5A), contained within a separate liquid permeable structure or envelope 67 in fluid communication with acquisition/distribution material 65 (Fig. 5C); or dispersed on, or within an adherent matrix of, retaining material 68, and in fluid communication with acquisition/distribution material 65 (Fig. 5E).
- the rearward region 55 may predominately contain acquisition/distribution material 65, but less storage material 66 as compared with forward region 54, or none (Figs. 5B, 5D, 5F).
- Insert 50 also may have a narrowed region in the area which rests in the crotch region of the outer cover. This narrowing in the crotch region may serve to enhance wearer comfort by eliminating size and bulk between the legs. Referring to Fig. 2B, it may also serve to better enable the crotch region 26 of outer cover 20 to contain and maintain a laterally centered position of insert 50, by ensuring that insert 50, by having limited quantities of absorbent materials therein and limited width, does not swell beyond the space capacity of crotch region 26 of outer cover 20. Such narrowing may continue, for example, into the rear portion of the insert, thereby creating overall shape/backsheet asymmetry.
- insert 50 also may include respective forward and rearward user grasp structures 59, 61.
- User grasp structures 59, 61 may be provided to enable the user to quickly and easily grasp insert 50 proximate its respective ends.
- User grasp structures 59, 61 may include tab-like extensions as shown in Figs. 2F, 3 and 4, with free ends unattached to the outer cover 20 when insert 50 is installed therein, which are easily graspable.
- User grasp structures may have different forms as well.
- user grasp structures may take the form of loop-like extensions (not shown) extending from the ends of insert 50, finger holes (not shown) through insert 50 proximate the ends thereof, pockets with openings facing the lateral centerline 70 of the insert, and other structures that facilitate grasping and pulling of insert 50 at locations proximate to its ends.
- the respective hook and loop components are supplied in sheet or strip form, they may be cut into suitably shaped patches that can be affixed to a cloth substrate by various mechanisms, including adhesive bonding, mechanical bonding, ultrasonic bonding, sewing, stitching, serging, edging, and the like. If respective hook-and-loop patches are used as fastener components, relative ease of fastening, simplicity and convenience for the user (as compared with, for example, fastener components such as a button and button hole) are one among several advantages provided, because fastening is effected simply by placing the fastener components in face-to-face contact and applying gentle pressure.
- Some types of hook components may, in some circumstances, tend to snag or catch undesirably on a variety of materials in addition to intended corresponding loop components, while most types of loop components currently available do not have this tendency. Thus, in some circumstances it may be desired that patches of loop components form one or both of insert fastener components 33, 32, while patches of hook components form one or both of fastener components 56, 57. This arrangement places a non-snagging insert fastener component on the outer cover. This may be desirable in some circumstances, such as when the outer cover 20 is designed to be reusable - reducing the likelihood that components on an outer cover 20 will undesirably snag on other parts of outer cover 20 or on other articles, such as clothing articles, being stored or laundered along with outer cover 20.
- fastening pairs 56, 33 and 57, 32 need not necessarily include respective components of a hook-and-loop fastening system, and need not necessarily include respective components of a two-component fastening system. Rather, a fastening system may require only one fastener component, or use other types of fastener components.
- Fastener components used may be adapted to engage, retain, and otherwise hold the insert or a portion thereof.
- a fastener component on outer cover 20 may include a patch of adhesive; a structure having a region of relatively high coefficient of friction; a pocket; flap; strap; or other capturing, holding and/or retaining surface, device or structure.
- an outer cover 20 may have a pocket structure 33a in front region 27 (see Fig. 2C) in combination with a patch of loops component forming rear fastener component 32 (see Fig. 2B).
- a suitably adapted insert 50 having a patch of hooks as fastener component 57 to install the insert the user may insert the forward edge of insert 50 into the pocket structure 33a, and then fasten the rearward portion of insert 50 into the rear region of the outer cover 20 by engaging respective fastener components 32, 57.
- a fastener component in any form including a respective component of a fastening pair 56, 33 and 57, 32 may be disposed on either of insert 50 or outer cover 20.
- a hook patch may be disposed on either of insert 50 or outer cover 20, with a cooperating loop patch disposed on the other of insert 50 or outer cover 20.
- An insert fastener component such as component 32 on outer cover 20 may be attached or connected to at least a portion of an anchoring system, such as an anchoring band 38, or diagonal anchoring band 38a. This may provide, as one advantage, the distribution of structural loading resulting from the weight of absorbed or contained exudates, as described in one or more of the patent applications cited above, in the description of anchoring bands.
- Fastening locations may be multiply disposed, for example, at each of the four corners of insert 50 and corresponding locations on outer cover 20, and even at other locations along insert 50 and outer cover 20, created by fastener components suitably selected and disposed.
- fastener components may be disposed along the longitudinal sides proximate the ends of the insert in the forward and/or rearward region of the insert.
- Fastener components may be disposed adjacent an edge of the insert, or may be disposed laterally and longitudinally inboard of the edge.
- a fastener component may be disposed at least 1, 2, or 3 cm from all edges of the insert.
- having a single, localized fastening location proximate only one or two ends of insert 50 provides a partially force-decoupled attachment of insert 50 within outer cover 20.
- This may be especially desired in the rear region 28 of outer cover 20, where extensibility and/or elasticity of outer cover 20 may be especially desired to maintain fit, comfort and appearance while accommodating body contours and movements of the wearer about the buttocks and hips.
- the portions of outer cover 20 surrounding fastening element (s) 33, 32 such as waistband portions 34, 35, and front and rear regions 27, 28, may laterally stretch and contract substantially independently of and unimpeded by the structure of insert 50 and portions thereof.
- a patch of hook components forming a fastener component 56 and/or 57 attached to insert 50 may be substantially laterally centered on the insert as suggested in the figure, and may have an width W f attached along insert 50 that extends no more than about 50% of the lateral width W 1 of the insert 50 at forward region 54 and/or rearward region 55.
- End support stiffeners 60, 62 may be affixed to, or incorporated within, insert 50 proximate the ends thereof as suggested by Figs. 3 and 4. In addition to increasing the tendency of insert 50 to maintain optimal shape while in use, such end support stiffeners may increase the tendency of the respective ends of insert 50 to stay open and flat before insert 50 is installed in an outer cover. Because the ends of insert 50 may otherwise be folded over or bunched while being stored and/or carried by the user before installation, end support stiffeners may enhance user convenience, by causing the ends of insert 50 to maintain or seek a shape/configuration that requires less manipulation by the user to install it in an outer cover.
- one or more end support stiffeners 60, 62 may be disposed in a lateral orientation with respect to the insert and formed of any flat, sheet-like or card-like material, or any flat, stiffened assembly.
- an end support stiffener may be formed by folding over a portion of the insert end material(s) to create a stiffened region comprising folded layers of material.
- end support stiffeners 60, 62 may be formed by depositing onto the ends of insert 50 lateral bands, strips or other shapes or patterns of deposits of liquid or semi- liquid adhesive or other material that cures or cools to a stiffened state, and thereby imparts added stiffness to the substrate to which it is applied.
- end support stiffeners may be formed of cardboard or like material.
- suitable stiffener material is 0.031 in. thick VOLARA foam supplied in sheet form (a product of Sekisui Voltek, LLC, Lawrence, MA). Stiffener materials may be laminated with or adhesively applied to portions of insert 50 to be stiffened, or applied, affixed or included by any other suitable method.
- suitable stiffening materials may include added layers of nonwovens, tufted nonwovens, films, laminates of films and nonwovens, patches of fastener loops or hooks components, portions of a suitable grasp structure, etc.
- the portions of insert 50 including one or more end support stiffeners 60, 62 are sufficiently stiff to effectively resist the tension forces in standing cuffs 53 and substantially maintain standing cuffs 53 in their gasketing configurations while insert 50 is in use, and substantially maintain the corners of insert 50 in laterally extended positions, preventing buckling or bunching of the same.
- the amount of stiffness desired may depend upon various factors including the inherent stiffness of the insert materials without a supplemental end support stiffener, and the amount and/or range of tension in the standing cuffs when the article is worn.
- End support stiffeners 60, 62 may increase planar, lateral and/or longitudinal stiffness of the areas of insert 50 in which they are located, as compared with portions of the insert adjacent such stiffeners with respect to a plan view (such as Fig. 4). These differing orientational aspects of stiffness may affect various attributes of the insert. For example, referring to Fig. 3, it can be seen that the ability of a portion including an end support stiffener 60, 62 (stiffened portion) to resist longitudinal tension forces in standing cuffs 53, may be affected by one or more of planar and longitudinal stiffness of the stiffener. The pliability and relative comfort or discomfort for the wearer, associated with a presence of a stiffened portion, may be affected by planar stiffness of the stiffener.
- an end support stiffener may range from about 5 mm to about 50 mm.
- a stiffener also may extend longitudinally beyond the lateral edge of other materials forming the insert.
- One or both ends of the insert may include an end support stiffener.
- the respective end support stiffeners may have differing shapes, dimensions, stiffness, thickness, color, structure, placement, material(s) or composition.
- An end support stiffener also may include, or be integral with, a grasp structure or fastener component as described above, and as suggested in Fig. 3 (end support stiffener 60 is depicted as integral with grasp structure 59).
- an insert 50 may be imparted with features that make it asymmetric about its lateral axis.
- insert 50 may have an overall profile that does not appear to be asymmetric about its lateral axis.
- insert 50 may have an overall profile, when opened and laid flat, that is substantially rectangular, and thus, appears to be symmetric about its lateral axis 70.
- Other insert profiles are possible as well, which have overall profiles which appear symmetric about a lateral axis.
- an insert 50 may not be clear just from the profile which portion is the forward portion and which portion is the rearward portion.
- the insert and/or outer cover may comprise one or more insert targeting indicia to indicate, facilitate and/or compel correct positioning and association of portions of the insert within the outer cover.
- the insert targeting indicia may comprise verbal or non-verbal instructive indicia, visual targeting indicia, cooperating geometrical features, cooperating types of fastener components, or cooperating designs of fastener components sized and formed to indicate or compel the engagement of the insert with the correct region of, and in correct orientation with, the outer cover so as to enable the optimum performance of the wearable absorbent article.
- one or more of the inserts in the plurality may be adapted for extended or nighttime use (sleep-use), and one or more for daytime use, with respect to features such as, e.g., location of absorbent material and absorbent capacity.
- Half of the number of inserts in the plurality, or fewer than half, may be adapted for sleep-use.
- disposable absorbent portions may have more simplified designs, reducing manufacturing and material costs as compared with those of disposable diapers.
- the possibility for making a disposable absorbent insert of non-traditional renewable materials (such as paper) is presented.
- a disposable absorbent insert and outer cover having some or all of the features described herein may in many circumstances prevent most or all soiling of the outer cover by the wearer's exudates, thereby mitigating sanitation and odor problems associated with handling and storage, reducing the frequency of laundering necessary, and reducing the need for laundering resources, efforts and/or expenses, associated with conventional cloth diapers.
- a disposable absorbent insert having some or all of the features described herein also may provide better absorbency and better isolation of exudates from both the wearer's skin, and the wearer's clothing and environment, than conventional cloth diapers.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CA2749609A CA2749609C (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent article |
EP10700666A EP2376039A1 (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent article |
CN201080004602.4A CN102281845B (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent article |
JP2011546325A JP2012515057A (en) | 2009-01-15 | 2010-01-14 | Wearable absorbent article consisting of two parts |
MX2011007577A MX2011007577A (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent article. |
BRPI1006802A BRPI1006802A2 (en) | 2009-01-15 | 2010-01-14 | absorbent articles for wearing in two pieces |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US14486609P | 2009-01-15 | 2009-01-15 | |
US61/144,866 | 2009-01-15 |
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WO2010083287A1 true WO2010083287A1 (en) | 2010-07-22 |
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Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2010/021015 WO2010083290A1 (en) | 2009-01-15 | 2010-01-14 | Disposable absorbent insert for two-piece wearable absorbent article |
PCT/US2010/021021 WO2010083293A1 (en) | 2009-01-15 | 2010-01-14 | Outer cover for two-piece wearable absorbent article |
PCT/US2010/021010 WO2010083287A1 (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent article |
PCT/US2010/020954 WO2010083260A1 (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent articles |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2010/021015 WO2010083290A1 (en) | 2009-01-15 | 2010-01-14 | Disposable absorbent insert for two-piece wearable absorbent article |
PCT/US2010/021021 WO2010083293A1 (en) | 2009-01-15 | 2010-01-14 | Outer cover for two-piece wearable absorbent article |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2010/020954 WO2010083260A1 (en) | 2009-01-15 | 2010-01-14 | Two-piece wearable absorbent articles |
Country Status (15)
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US (4) | US8784395B2 (en) |
EP (4) | EP2376046B1 (en) |
JP (5) | JP5497069B2 (en) |
CN (4) | CN102281850A (en) |
AR (1) | AR075333A1 (en) |
AU (2) | AU2010204749A1 (en) |
BR (4) | BRPI1007492A2 (en) |
CA (4) | CA2749747C (en) |
ES (1) | ES2593081T3 (en) |
MX (4) | MX2011007571A (en) |
PL (1) | PL2376046T3 (en) |
RU (2) | RU2519957C2 (en) |
SG (2) | SG172966A1 (en) |
WO (4) | WO2010083290A1 (en) |
ZA (1) | ZA201104165B (en) |
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