WO2025207111A1 - Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide - Google Patents

Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide

Info

Publication number
WO2025207111A1
WO2025207111A1 PCT/US2024/022336 US2024022336W WO2025207111A1 WO 2025207111 A1 WO2025207111 A1 WO 2025207111A1 US 2024022336 W US2024022336 W US 2024022336W WO 2025207111 A1 WO2025207111 A1 WO 2025207111A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
superabsorbent
mixed layer
absorbent article
percent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2024/022336
Other languages
English (en)
Inventor
Jinyoung Jung
Wonjun SEO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kimberly Clark Worldwide Inc
Kimberly Clark Corp
Original Assignee
Kimberly Clark Worldwide Inc
Kimberly Clark Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kimberly Clark Worldwide Inc, Kimberly Clark Corp filed Critical Kimberly Clark Worldwide Inc
Priority to PCT/US2024/022336 priority Critical patent/WO2025207111A1/fr
Publication of WO2025207111A1 publication Critical patent/WO2025207111A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A61F13/53—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 absorbing medium
    • A61F13/534—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 absorbing medium having an inhomogeneous composition through the thickness of the pad
    • 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
    • A61F13/53—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 absorbing medium
    • A61F13/534—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 absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • 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
    • A61F13/53—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 absorbing medium
    • A61F2013/530481—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • 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
    • A61F13/53—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 absorbing medium
    • A61F2013/530481—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530489—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material
    • A61F2013/530496—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material being fixed to fibres
    • 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
    • A61F13/53—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 absorbing medium
    • A61F13/534—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 absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F2013/5349—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 absorbing medium having an inhomogeneous composition through the thickness of the pad being a tissue-wrapped core

Definitions

  • absorbent bodies such as absorbent cores
  • absorbent bodies are generally responsible for capturing and retaining liquid bodily exudates, thereby preventing the exudates from leaking out of the absorbent article and further retaining the liquid away from a wearer's skin, which helps to promote skin health.
  • Advances in the structure and performance of absorbent bodies to produce thinner products which uptake liquid more quickly and leak less are a continued important area of market desire.
  • absorbent cores implement quantitative increases, such as increasing basis weight of nonwoven materials and/or increasing application of superabsorbent material (SAM), to improve absorption performance.
  • SAM superabsorbent material
  • increasing the amount of absorbent can also cause gel blocking and other phenomenon that limit improvement of the absorption capacity.
  • absorbent cores with predominantly (e.g., one hundred percent) SAM can also have poor initial instantaneous fluid absorption due to the time required for SAM to fully absorb fluids.
  • the present disclosure is directed an absorbent article a hybrid absorbent core assembly.
  • the hybrid absorbent core assembly includes a superabsorbent layer and a mixed layer.
  • the superabsorbent layer may be predominantly superabsorbent particles, e.g., such that the superabsorbent particles are present within the superabsorbent layer at no less than ninety-three percent (93%) percent by weight of the superabsorbent layer.
  • the mixed layer may be predominantly superabsorbent particles blended with and/or dispersed within cellulosic fluff fibers, e.g., such that the superabsorbent particles and the cellulosic fluff fibers are present within the mixed layer at no less than ninety-three percent (93%) by weight of the mixed layer with a ratio of the superabsorbent particles to the cellulosic fluff fibers ranging from 5:1 to 2:3 by weight.
  • the mixed layer may be disposed above and/or towards a bodyside of the absorbent article relative to the superabsorbent layer.
  • the mixed layer may be configured to facilitate initial absorption and distribution of liquid bodily exudates within the hybrid absorbent core, and the superabsorbent layer may be configured as a reservoir for retention of the liquid bodily exudates.
  • the mixed layer may facilitate rapid initial intake while the superabsorbent layer may limit or prevent rewet from the hybrid absorbent core to the wearer.
  • the absorbent article with the hybrid absorbent core may advantageously capture and retain liquid bodily exudates, thereby preventing the exudates from leaking out of the absorbent article and further retaining the liquid away from a wearer's skin, which helps to promote skin health.
  • the absorbent article may also be thinner than conventional absorbent articles while also proving rapid uptake and limited leakage of the liquid bodily exudates.
  • an absorbent article in one example embodiment, includes a bodyside liner, an outer cover, and an absorbent core assembly disposed between the bodyside liner and the outer cover.
  • the absorbent core assembly includes a superabsorbent layer, a nonwoven layer, a mixed layer, and a nonwoven wrap.
  • the superabsorbent layer includes superabsorbent particles and an adhesive. The adhesive bonds the superabsorbent particles together in the superabsorbent layer.
  • the superabsorbent particles are present within the superabsorbent layer at no less than ninety-five percent (95%) by weight of the superabsorbent layer.
  • the adhesive is present within the superabsorbent layer at no greater than five percent (5%) by weight of the superabsorbent layer.
  • the nonwoven layer contacts the superabsorbent layer.
  • the mixed layer includes superabsorbent particles and cellulosic fluff fibers.
  • the mixed layer is disposed between the nonwoven layer and the bodyside liner.
  • the superabsorbent particles are present within the mixed layer at no less than forty percent (40%) and no greater than eighty percent (80%) by weight of the mixed layer.
  • the cellulosic fluff fibers are present within the mixed layer at no less than twenty percent (20%) and no greater than sixty percent (60%) by weight of the mixed layer.
  • the nonwoven wrap is disposed around the superabsorbent layer and the mixed layer.
  • the mixed layer defines a plurality of channels that extend through the mixed layer from a bodyside facing side of the mixed layer to an outward facing side of the mixed layer. The plurality of channels are essentially free of the superabsorbent particles and the cellulosic fluff fibers of the mixed layer.
  • FIG. 1 is a perspective view of an absorbent garment in a closed configuration, according to example aspects of the present disclosure.
  • FIG. 2 is a plan view of the example absorbent garment of FIG. 1 in an open and laid flat configuration.
  • FIG. 4 is a section view of an absorbent core assembly according to example aspects of the present disclosure.
  • FIGS. 5 through 10 are top plan views of the example absorbent core assembly of FIG. 4 according to various example embodiments of the present disclosure.
  • FIG. 13 is a schematic view of a process for forming core assemblies according to example aspects of the present disclosure.
  • FIGS. 14 through 17 are charts of various performance values for a sample inventive absorbent article relative to a comparative conventional absorbent article according example aspects of the present disclosure.
  • FIG. 18 is a schematic view of another process for forming core assemblies according to example aspects of the present disclosure. Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present invention.
  • the present disclosure is generally directed an absorbent article with an absorbent core assembly disposed between a bodyside liner and an outer cover.
  • the absorbent core assembly includes a superabsorbent layer, a nonwoven layer, a mixed layer, and a nonwoven wrap.
  • the superabsorbent layer includes superabsorbent particles, which may be present within the superabsorbent layer at no less than ninety-three percent (93%) by weight of the superabsorbent layer.
  • An adhesive may bond the superabsorbent particles together in the superabsorbent layer.
  • the mixed layer is disposed between the nonwoven layer and the bodyside liner, and the mixed layer includes superabsorbent particles and cellulosic fluff fibers.
  • the superabsorbent particles may be present within the mixed layer at no less than forty percent (40%) and no greater than eighty percent (80%) by weight of the mixed layer, and the cellulosic fluff fibers may be present within the mixed layer at no less than twenty percent (20%) and no greater than sixty percent (60%) by weight of the mixed layer.
  • the nonwoven wrap is disposed around the superabsorbent layer and the mixed layer.
  • the mixed layer may be positioned and structured to facilitate initial absorption and distribution of liquid bodily exudates.
  • the mixed layer may rapidly absorb liquid bodily exudates upon insult at the bodyside liner.
  • the superabsorbent layer may be positioned and structured to provide a reservoir for retention of the liquid bodily exudates.
  • the superabsorbent layer may be disposed below the mixed layer within the absorbent body, e.g . , such that the superabsorbent layer is disposed between the mixed layer and the outer cover.
  • the superabsorbent layer may provide greater absorption capacity for the liquid bodily exudates, e.g., despite have a slower absorption rate than the mixed layer.
  • the absorbent core assembly may provide a multilayer, hybrid absorbent core, which can advantageously provide improved initial intake relative to absorbent core with predominantly superabsorbent particles, such as fluff free absorbent cores that are essentially free of cellulosic fluff fibers, while also providing desirable rewet characteristics.
  • the absorbent article may thereby advantageously capture and retain liquid bodily exudates, thereby preventing the exudates from leaking out of the absorbent article and further retaining the liquid away from a wearer's skin, which helps to promote skin health.
  • the absorbent article may also be thinner than conventional absorbent articles.
  • the articles “a”, “an”, “the” and “said” are intended to mean that there are one or more of the elements.
  • the terms “includes” and “including” are intended to be inclusive in a manner similar to the term “comprising.”
  • the term “or” is generally intended to be inclusive (i.e. , “A or B” is intended to mean “A or B or both”). Approximating language, as used herein throughout the specification and claims, is applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related.
  • a value modified by a term or terms, such as “about,” “approximately,” and “substantially,” are not to be limited to the precise value specified.
  • the approximating language may correspond to the precision of an instrument for measuring the value.
  • the approximating language may refer to being within a ten percent (10%) margin.
  • absorbent article or “absorbent garment” refers herein to an article which may be placed against or in proximity to the body (i.e., contiguous with the body) of the wearer to absorb and contain various liquid, solid, and semi-solid exudates discharged from the body.
  • absorbent articles as described herein, are intended to be discarded after a limited period of use instead of being laundered or otherwise restored for reuse. It is to be understood that the present disclosure is applicable to various disposable absorbent articles, including, but not limited to, diapers, diaper pants, training pants, youth pants, swim pants, incontinence products, absorbent feminine care products, and the like without departing from the scope of the present disclosure.
  • airlaid refers herein to a web manufactured by an airlaying process.
  • bundles of small fibers having typical lengths ranging from about three millimeters (3 mm) to about fifty-two millimeters (52 mm) are separated and entrained in an air supply and then deposited onto a forming screen, usually with the assistance of a vacuum supply.
  • the randomly deposited fibers are then bonded to one another using, for example, hot air to activate a binder component or a latex adhesive.
  • Airlaying is taught in, for example, U.S. Patent No. 4,640,810 to Laursen, et al., which is incorporated herein in its entirety by reference thereto for all purposes.
  • bonded refers to the joining, adhering, connecting, attaching, or the like, of two elements. Two elements will be considered bonded together when they are joined, adhered, connected, attached, or the like, directly to one another or indirectly to one another, such as when bonded to an intermediate element.
  • the bonding can occur via, for example, adhesive, pressure bonding, thermal bonding, ultrasonic bonding, stitching, suturing, and/or welding.
  • carded web refers herein to a web containing natural or synthetic staple fibers typically having fiber lengths less than about one hundred millimeters (100 mm). Bales of staple fibers can undergo an opening process to separate the fibers that are then sent to a carding process that separates and combs the fibers to align them in the machine direction after which the fibers are deposited onto a moving wire for further processing. Such webs are usually subjected to some type of bonding process, such as thermal bonding using heat and/or pressure. In addition to or in lieu thereof, the fibers can be subject to adhesive processes to bind the fibers together, such as by the use of powder adhesives.
  • the carded web can be subjected to fluid entangling, such as hydroentangling, to further intertwine the fibers and thereby improve the integrity of the carded web.
  • Carded webs, due to the fiber alignment in the machine direction, once bonded, will typically have more machine direction strength than cross machine direction strength.
  • cellulosic fluff' and “cellulosic fluff fibers” refers herein to a blend of cellulosic fibers, such as wood pulp fluff.
  • wood pulp fluff can be identified with the trade designation NB416, available from Weyerhaeuser Corp., and is a bleached, highly absorbent wood pulp containing primarily soft wood fibers.
  • coform refers herein to composite materials comprising a mixture or stabilized matrix of thermoplastic fibers and a second non-thermoplastic material.
  • coform materials may be made by a process in which at least one meltblown die head is arranged near a chute through which other materials are added to the web while it is forming.
  • Such other materials may include, but are not limited to, fibrous organic materials such as woody or non-woody pulp such as cotton, rayon, recycled paper, pulp fluff, and also superabsorbent particles, inorganic and/or organic absorbent materials, treated polymeric staple fibers and so forth.
  • connection refers to the joining, adhering, bonding, attaching, or the like, of two elements. Two elements will be considered to be connected together when they are connected directly to one another or indirectly to one another, such as when each is directly connected to intermediate elements.
  • disposed is intended to mean that one element can be integral with another element, or that one element can be a separate structure bonded to or placed with or placed near another element.
  • elastomeric refers to a material or composite which can be elongated by at least fifty percent (50%) of its relaxed length and which will recover, upon release of the applied force, at least twenty percent (20%) of its elongation. It is generally preferred that the elastomeric material or composite be capable of being elongated by at least fifty percent (50%), more preferably by at least one hundred percent (100%), and still more preferably by at least three hundred percent (300%) of its relaxed length and recover, upon release of an applied force, at least fifty percent (50%) of its elongation.
  • fibrous absorbent material refers herein to natural fibers, cellulosic fibers, synthetic fibers composed of cellulose or cellulose derivatives, such as rayon fibers; inorganic fibers composed of an inherently wettable material, such as glass fibers; synthetic fibers made from inherently wettable thermoplastic polymers, such as particular polyester or polyamide fibers, or composed of nonwettable thermoplastic polymers, such as polyolefin fibers which have been hydrophilized by suitable means.
  • the fibers may be hydrophilized, for example, by treatment with a surfactant, treatment with silica, treatment with a material which has a suitable hydrophilic moiety and is not readily removed from the fiber, or by sheathing the nonwettable, hydrophobic fiber with a hydrophilic polymer during or after formation of the fiber.
  • grams refers herein to grams per square meter.
  • liquid impermeable refers herein to a layer or multi-layer laminate in which liquid body exudates, such as urine, will not pass through the layer or laminate, under ordinary use conditions, in a direction generally perpendicular to the plane of the layer or laminate at the point of liquid contact.
  • liquid permeable refers herein to any material that is not liquid impermeable.
  • machine direction refers to the length of a fabric in the direction in which it is produced, as opposed to a “cross-machine direction” (CD) which refers to the width of a fabric in a direction generally perpendicular to the machine direction.
  • nonwoven fabric or “nonwoven web” refers herein to a web having a structure of individual fibers or threads which are interlaid, but not in an identifiable manner as in a knitted fabric.
  • Nonwoven fabrics or webs have been formed from many processes such as, for example, meltblowing processes, spunbonding processes, through-air bonded carded web (also known as BCW and TABCW) processes, etc.
  • Spunbond fibers are generally continuous and often have average deniers larger than about 0.3, and in an embodiment, between about 0.6, 5 and 10 and about 15, 20 and 40. Spunbond fibers are generally not tacky when they are deposited onto a collecting surface. Spunbond fibers may sometimes have diameters less than about forty microns (40 pm), and often between about five microns (5 m), to about twenty microns (20 pm).
  • SAP superabsorbent polymer
  • SAP superabsorbent material
  • SAM Sulfonate
  • Water absorbing polymers which are classified as hydrogels, which can be cross-linked, absorb aqueous solutions through hydrogen bonding and other polar forces with water molecules.
  • a SAP's ability to absorb water is based in par on iconicity (a factor of the ionic concentration of the aqueous solution), and the SAP functional polar groups that have an affinity for water.
  • SAP are typically made from the polymerization of acrylic acid blended with sodium hydroxide I the presence of an initiator to form a poly-acrylic acid sodium salt (sometimes referred to as sodium polyacrylate).
  • SAP may be present in absorbent garments in particle or fibrous form or as a coating or another material or fiber.
  • particle when used with the term “superabsorbent polymer,” refer to the form of discrete units.
  • the units can comprise flakes, fibers, agglomerates, granules, powders, spheres, pulverized materials, or the like, as well as combinations thereof.
  • the particles can have any desired shape: for example, cubic, rod like polyhedral, spherical or semi- spherical, rounded or semi-rounded, angular, irregular, et cetera.
  • articulate superabsorbent polymer and “particulate superabsorbent polymer composition” refer to the form of superabsorbent polymer and superabsorbent polymer compositions in discrete form, wherein the “particulate superabsorbent polymer” and “particulate superabsorbent polymer compositions” may have a particle size of less than 1000pm, or from about 150pm to about 850 pm.
  • polymer includes, but is not limited to, homopolymers, copolymers, for example, block, graft, random, and alternating copolymers, terpolymers, etc., and blends and modifications thereof. Furthermore, unless otherwise specifically limited, the term “polymer” shall include all possible configurational isomers of the material. These configurations include, but are not limited to isotactic, syndiotactic, and atactic symmetries.
  • percent (%) by weight” or “%wt” as used herein and referring to components of the dry particulate superabsorbent polymer composition is to be interpreted as based on the weight of the dry superabsorbent polymer composition, unless otherwise specified herein.
  • superabsorbent refers herein to a water-swellable, water-insoluble organic or inorganic material capable, under the most favorable conditions, of absorbing at least about fifteen (15) times its weight and, in an aspect, at least about thirty (30) times its weight, in an aqueous solution containing 0.9 weight percent sodium chloride.
  • the superabsorbent materials can be natural, synthetic, and modified natural polymers and materials.
  • the superabsorbent materials can be inorganic materials, such as silica gels, or organic compounds, such as cross-linked polymers.
  • an absorbent article or garment 20 extends along a longitudinal direction 23 and a lateral direction 22 perpendicular to the longitudinal direction 23.
  • the terms “longitudinal” and “lateral” have their customary meaning, as indicated by the central longitudinal axis 24 and the central lateral axis 25.
  • the central longitudinal axis 24 lies in the plane of the garment 20 when the garment 20 is in a fully stretched and laid-flat condition, while the front and rear panels 40, 41 are separated, and is generally parallel to a vertical plane that bisects a standing wearer into left and right body halves when the garment 20 is worn.
  • the central lateral axis 25 lies in the plane of the garment 20 and is generally perpendicular to the central longitudinal axis 24.
  • the garment 20 has a front region 30 defining a front waist end edge 32, a rear region 34 defining a rear waist end edge 36, and a crotch region 38 positioned longitudinally between the front region 30 and the rear region 34.
  • the crotch region 38 defines two laterally opposed crotch side edges 39.
  • the garment 20 defines a garment length 21 that extends from the front waist end edge 32 to the rear waist end edge 36.
  • the garment 20 includes a front panel 40 which defines a front panel leg edge 44 spaced longitudinally inward from the front waist end edge 32, and first and second laterally opposed front panel side edges 46, 48.
  • the garment 20 also includes a rear panel 41 which defines a rear panel leg edge 45 spaced longitudinally inward from the rear waist end edge 36, and first and second laterally opposed rear panel side edges 47, 49.
  • “Longitudinally inward (or inboard)” as used to describe garment embodiments herein means in a direction longitudinally toward the central lateral axis 25.
  • laterally inward (or inboard) as used to describe garment embodiments herein means in a direction laterally toward the central longitudinal axis 24.
  • the front panel 40 is longitudinally spaced apart from the rear panel 41 .
  • the front and rear panels 40 generally include elasticized materials so as to conform to a wearer’s body.
  • a pair of side seams 84 connects the front region 30 to the rear region 34, such that the garment 20 defines a waist opening 27 and a pair of leg openings 28.
  • the side seams 84 may be permanent but tearable, such as by way of adhesive, thermal, pressure, or ultrasonic bonding, or may be more readily releasable as well as refastenable, such as via the use of mechanical fastening elements.
  • the garment 20 may further include at least one front leg elastic member 70 disposed adjacent the front panel leg edge 44, and/or at least one rear leg elastic member 75 disposed adjacent the rear panel leg edge 45.
  • Such leg elastic members 70 and/or 75 help to provide additional elastic support around the leg openings 28 to enhance the fit and leakage protection of the garment 20.
  • Each leg elastic member 70, 75 may include a single ribbon, strand, or thread (or the like) of elastic material, or each may include two, three, or more ribbons, strands, or threads (or the like) of elastic material.
  • the rear leg elastic member 75 and/or the front leg elastic member 70 extends laterally across the entire garment width. In other example embodiments, such as that representatively illustrated in FIGS.
  • the rear leg elastic member 75 may include a pair of rear leg elastic members, such as first and second rear leg elastic members 76, 77 positioned on opposite sides of the absorbent composite 50.
  • the front leg elastic member 70 may include a pair of front leg elastic members, such as first and second front leg elastic members 71 , 72 positioned on opposite sides of the absorbent composite 50.
  • each rear leg elastic member 75 may include a plurality of elastomeric strands, and/or each front leg elastic member 70 may include a plurality of elastomeric strands.
  • an absorbent composite 50 is connected to and between the front panel 40 and the rear panel 41.
  • the absorbent composite 50 may include a composite structure formed of a liquid impermeable barrier layer 52 defining a width 53 and a length 51 , an absorbent body 54 including absorbent material, a liquid permeable liner 55, and/or crotch elastic members 56.
  • the term “absorbent material” may mean fibrous absorbent material, superabsorbent material (SAM), or a combination of both fibrous absorbent material and SAM.
  • the absorbent body 54 in some example embodiments, may include a layered structure that includes multiple regions of liquid-absorbing materials such as fibrous absorbent material and/or SAM.
  • the absorbent body 54 defines a length 61 and a width 63. Further description of example absorbent bodies 54 of the present disclosure is presented below with respect to FIG. 3.
  • the exemplary pant-like garment 20 is only one possible example of an absorbent garment or article which may be used with the described absorbent bodies 54 of the present disclosure.
  • Such garments 20 as those shown in FIGS. 1 and 2 may be generally described as garments formed using a cross-machine direction (CD) manufacturing process.
  • Alternative exemplary garments which may be used with the described absorbent bodies 54 may include those garments formed by a machine-direction (MD) manufacturing process.
  • MD machine-direction
  • the present disclosure is not meant to be limited to the specifically disclosed absorbent garments. Rather, the described absorbent bodies 54 may be used within any suitable chassis structure for retaining the described absorbent bodies 54 on a wearer.
  • the described absorbent bodies 54 may not be used with any chassis structure at all. Rather, the absorbent bodies 54 may be constructed so as to be able to be placed directly in contact with a wearer's body - for example using body-adhesive disposed on a body-side surface of the absorbent bodies 54.
  • FIGS. 3 and 4 are schematic depictions of a section of an example absorbent body 54 of the present disclosure.
  • the body 54 of FIG. 3 may be a cross-section of the absorbent body 54 in FIG. 2, as viewed along line 3-3 of FIG. 2 and with any additional layers of the garment 20 removed.
  • the absorbent body 54 of the present disclosure may include multiple different materials, with some of the materials layered together to form the body 54.
  • the absorbent body 54 may be disposed between a bodyside liner 100, such as the liquid permeable liner 55 shown in FIG. 2, and an outer cover 110, such as the liquid impermeable barrier layer 52 shown in FIG. 2.
  • the bodyside liner 100 may be liquid permeable and may perform well in the uptake and wicking of fluid.
  • the outer cover 110 may be liquid impermeable and may limit or prevent fluid transmission therethrough.
  • the absorbent body 54 may extend between a bodyside facing portion 120 and an outwardly facing portion 122, e.g. , along a transverse direction 26, which may be mutually perpendicular to the longitudinal direction 23 and the lateral direction 22.
  • the bodyside facing portion 120 of the absorbent body 54 may be positioned at and/or face towards the bodyside liner 100.
  • the outwardly facing portion 122 of the absorbent body 54 may be positioned at and/or face towards the outer cover 110.
  • the adhesive may be present within the superabsorbent layer 130 at no greater than seven percent (7%), such as no greater than five percent (5%), such as no greater than four percent (4%), no less than three percent (3%), by weight of the superabsorbent layer 130.
  • the adhesive may be applied by spraying directly on the superabsorbent particles or spraying on the nonwoven layer 150.
  • the superabsorbent layer 130 may be predominantly composed of superabsorbent particles. Moreover, the superabsorbent layer 130 may be essentially free of cellulosic fluff fibers and/or be fluff-free. A basis weight of the superabsorbent layer 130 may be no less than ninety grams per square meter (90 gsm) and no greater than three hundred and fifty grams per square meter (350 gsm) in example embodiments. The superabsorbent layer 130 may be constructed by patterning the superabsorbent particles for smooth distribution of the fluid.
  • the mixed layer 140 may include superabsorbent particles as well as cellulosic fluff fibers.
  • the superabsorbent particles may be present within the mixed layer 140 at no less than forty percent (40%) and no greater than eighty percent (80%), such as no less than forty-five percent (45%) and no greater than seventy-five percent (75%), no less than fifty percent (50%) and no greater than seventy percent (70%), such as about sixty percent (60%), by weight of the mixed layer 140.
  • the cellulosic fluff fibers may be present within the mixed layer 140 at no less than twenty percent (20%) and no greater than sixty percent (60%), such as no less than twenty-five percent (25%) and no greater than fifty-five percent (55%), no less than thirty percent (30%) and no greater than fifty percent (50%), such as about forty percent (40%), by weight of the mixed layer 140.
  • the mixed layer 140 may include both superabsorbent particles and cellulosic fluff fibers.
  • the mixed layer 140 may be predominantly composed of superabsorbent particles and cellulosic fluff fibers.
  • a basis weight of the mixed layer 140 may be no less than ninety grams per square meter (90 gsm) and no greater than two hundred and fifty grams per square meter (250 gsm), such as no less than one hundred grams per square meter (100 gsm) and no greater than two hundred grams per square meter (200 gsm), in example embodiments.
  • the mixed layer 140 may be essentially free of cross-linked cellulose fibers, including crimped, twisted, or curled cross-linked cellulose fibers.
  • the superabsorbent particles in the superabsorbent layer 130 may be a common type and/or grade as the superabsorbent particles in the mixed layer 140.
  • the example absorbent bodies 54 in FIGS. 3 and 4 may also include a nonwoven layer 150 and a nonwoven wrap 160.
  • the nonwoven layer 150 and the nonwoven wrap 160 may be discrete and separate from each other within the absorbent body 54.
  • the absorbent body 54 may include two (2) or more layers of nonwoven material, e.g., in addition to the superabsorbent layer 130 and the mixed layer 140
  • the nonwoven layer 150 may be disposed on and/or contact the superabsorbent layer 130. For instance, as shown in FIGS. 3 and 4, the nonwoven layer 150 may be wrapped or otherwise disposed around the superabsorbent layer 130. Moreover, the nonwoven layer 150 may surround the superabsorbent layer 130 with the nonwoven layer 150, e.g., in a plane that is perpendicular to the longitudinal direction 23. The nonwoven layer 150 may assist with limiting or preventing prevent escape of absorbent material, such as superabsorbent particles, from the superabsorbent layer 130.
  • the nonwoven layer 150 may include two separate layers 136, 138, e.g., with the superabsorbent layer 130 sandwiched between the two separate layers 136, 138 along the transverse direction 26.
  • the two separate layers 136, 138 may be bonded to the superabsorbent layer 130 at opposite sides if the superabsorbent layer 130.
  • the nonwoven layer 150 may be formed of any suitable material.
  • the nonwoven layer 150 may be liquid permeable and may perform well in the uptake and wicking of fluid.
  • the nonwoven layer 150 may include natural and/or synthetic fibers such as, but not limited to, polyester, polypropylene, acetate, nylon, polymeric materials, cellulosic materials and combinations thereof.
  • the nonwoven layer 150 may be hydrophilic.
  • the nonwoven layer 150 may be hydrophobic and may be treated in any manner known in the art to be made hydrophilic.
  • a few exemplary suitable materials for the nonwoven layer 150 include tissue materials, spunbond and/or meltblown materials (e.g. spunbond-meltblown materials and spunbond-meltblown- spunbond materials), spunlace materials, HYDROKNIT® materials, which are a class of materials commercially available from Kimberly-Clark World Wide, Inc., airlaid materials, through-air bonded carded webs (TABCW), and coform materials.
  • the nonwoven layer 150 may have basis weights ranging from between about five grams per square meter (5 gsm) and about fifty-five grams per square meter (55 gsm). Other suitable materials and/or materials having basis weights different than the above identified ranges may be used in other embodiments.
  • the superabsorbent layer 130 may be disposed below the mixed layer 140 within the absorbent body 54. Thus, the superabsorbent layer 130 may be disposed between the mixed layer 140 and the outer cover 110.
  • the superabsorbent particles in the superabsorbent layer 130 may provide greater absorption capacity for the liquid bodily exudates than the superabsorbent particles and cellulosic fluff fibers within the mixed layer 140.
  • the superabsorbent particles and cellulosic fluff fibers within the mixed layer 140 may advantageously provide improved initial intake, e.g., relative to absorbent cores with only superabsorbent particles, while also providing desirable rewet characteristics.
  • the absorbent body 54 may thereby advantageously capture and retain liquid bodily exudates, thereby preventing the exudates from leaking out of the garment 20 and further retaining the liquid away from a wearer's skin, which helps to promote skin health.
  • the absorbent body 54 may also be thinner than conventional absorbent articles, e.g., along the transverse direction 26.
  • the absorbent body 54 may further include an acquisition and/or distribution layer 168 (referred to herein as simply acquisition layer 168) disposed between the absorbent body 54 and the bodyside liner 100
  • the acquisition layer 168 may be coupled to the absorbent body 54 at the bodyside facing portion 120 of the absorbent body 54.
  • the acquisition layer 168 may be coupled to the absorbent body 54 by an adhesive.
  • an adhesive layer may be applied to the acquisition layer 168, which in turn may be applied to the absorbent body 54 at the bodyside facing portion 120.
  • the acquisition layer 168 may preferably include materials similar to those described above with respect to the nonwoven layer 150.
  • acquisition layer 168 may preferably include tissue materials, spunbond and/or meltblown materials (e.g.
  • spunbond-meltblown materials and spunbond-meltblown-spunbond materials may have basis weights ranging from between about five grams per square meter (5 gsm) and about fifty-five grams per square meter (55 gsm).
  • the acquisition layer 168 may be a tissue, SMS, or spunbond material having a basis weight of between about seven grams per square meter (7 gsm) and about twenty grams per square meter (20 gsm) or a coform, spunlace, or airlaid material having a basis weight of between about thirty-five grams per square meter (35 gsm) and about fifty-five grams per square meter (55 gsm).
  • the acquisition layer 168 may facilitate fluid flow from the bodyside liner 100 and the absorbent body 54.
  • the acquisition layer 168 and the absorbent body 54 may assist with acquisition and distribution of liquids by the garment 20 into the absorbent body 54, thereby speeding up fluid intake times.
  • the garment 20 may further include a bottom integrity sheet 170.
  • the bottom integrity sheet 170 may be disposed between the absorbent body 54 and the outer cover 110.
  • the bottom integrity sheet 170 may help to contain the superabsorbent particles within the garment 20 and away from the outer cover 52 as well as to provide additional void volume and/or absorbency to the garment 20 for superior fluid handling properties.
  • desirable materials for use as the bottom integrity sheet 170 include bulky materials and/or absorptive material including TABCW materials, spunlace materials, tissue materials, spunbond materials, spunbond meltblown spunbond materials, and coform materials.
  • Such materials may have a basis weight of between about ten grams per square meter (10 gsm) and about fifty grams per square meter (50 gsm), such as between about twenty grams per square meter (20 gsm) and about forty grams per square meter (40 gsm).
  • the bodies 54 may include additional adhesives.
  • adhesive may be applied to different materials of the bodies 54 so as to form different adhesive layers.
  • some embodiments may include an adhesive layer between the nonwoven layer 150 and the superabsorbent layer 130, e.g., applied to one or both of the nonwoven layer 150 and the superabsorbent layer 130.
  • example embodiments may include an adhesive layer between the nonwoven wrap 160 and the nonwoven layer 150 and/or the mixed layer 140, e.g., applied to one or more of the nonwoven wrap 160, the nonwoven layer 150, and the mixed layer 140.
  • FIGS. 5 through 10 show various example embodiments of the mixed layer 140 above the superabsorbent layer 130. It will be understood that, while not shown in FIGS. 5 through 10, the nonwoven layer 150 may be disposed between the mixed layer 140 and the superabsorbent layer 130 and/or the nonwoven layer 150 may be wrapped around the superabsorbent layer 130. As discussed in greater detail below, the mixed layer 140 and the superabsorbent layer 130 may be proportioned to facilitate initial absorption and distribution of liquid bodily exudates within the absorbent body 54.
  • the length LS of the superabsorbent layer 130 may be equal to or about equal to the length LM of the mixed layer 140 in example embodiments.
  • the width WS of the superabsorbent layer 130 may be greater than the width WM of the mixed layer 140.
  • the width WS of the superabsorbent layer 130 may be no greater than double (2X) the width WM of the mixed layer 140.
  • the width WS of the superabsorbent layer 130 may be equal to or about equal to the width WM of the mixed layer 140 in example embodiments.
  • the channels 142 may be positioned to facilitate initial absorption and distribution of liquid bodily exudates within the absorbent body 54.
  • the channels 142 may be disposed over a middle portion of the superabsorbent layer 130.
  • the channels 142 may facilitate transfer of the liquid bodily exudates through the mixed layer 140 towards the center portion of the superabsorbent layer 130.
  • the channels 142 may be oriented to facilitate initial absorption and distribution of liquid bodily exudates within the absorbent body 54.
  • the channels 142 may be elongated, e.g., along the longitudinal direction 23, in a plane that is perpendicular to the transverse direction 26.
  • a collective open area of the channels 142 may be no less than three square centimeters (3 cm 2 ) and no greater than twenty square centimeters (20 cm 2 ) in a plane that is perpendicular to the transverse direction 26.
  • Such sizing and/or shaping of the channels 142 may assist with acquisition and distribution of liquids by the garment 20 into the absorbent body 54, thereby speeding up fluid intake times.
  • the mixed layer 140 may include a suitable number of channels 142. As shown in FIGS. 7 through 10, the mixed layer 140 may include two channels 142 in example embodiments. For instance, the mixed layer 140 may include three, four, five, or more channels 142. In some example embodiments, as shown in FIG. 9, the mixed layer 140 may include two elongated channels 142 at the central portion of the mixed layer 140 and two or more additional channels 144, e.g., at opposite end portions of the mixed layer 140 along the longitudinal direction 23.
  • FIG. 13 is a schematic depiction of a method 200 of manufacturing absorbent cores, such as the absorbent bodies 54 of the present disclosure.
  • a core material 201 having a top side and a bottom side may be unwound from a spool including material forming the core material 201 .
  • the core material 201 may correspond to the nonwoven layer 150 and the superabsorbent layer 130, e.g., with the nonwoven layer 150 wrapped around the superabsorbent layer 130, described previously with respect to the absorbent bodies 54 of the present disclosure.
  • the core material 201 may include a superabsorbent layer with a nonwoven layer wrapped around the superabsorbent layer in example embodiments.
  • the core material 201 may be formed off-line from the method 200, wound onto a roll, and the roll of core material 201 may be unwound during the method 200. It will be understood that the core material 201 may be formed in-line as part of the method 200 in other example embodiments.
  • a mixed absorbent material 202 that include both superabsorbent particles and cellulosic fluff fibers may be applied to the core material 201 .
  • the mixed absorbent material 202 may correspond to the mixed layer 140 described above.
  • the mixed absorbent material 202 may form a separate layer of absorbent material over the core material 201 .
  • superabsorbent particles and cellulosic fluff fibers may be stored in a hopper 215 and may be dispensed through a conduit 216 to a first side of the core material 201 to form the mixed absorbent material 202.
  • a covering material 203 may be unwound from spool(s) and brought to cover the partial core assembly 211 , which includes the core material 201 and the mixed absorbent material 202, and form a full core assembly 221.
  • the covering material 203 may be guided by guide rolls.
  • the covering material 203 may correspond to the nonwoven wrap 160 in some example embodiments.
  • the process 200 may include embossing the full core assembly 221 with embossing rolls 205.
  • the full core assembly 221 may also be heat pressure sealed at rolls 206.
  • the first web material 310 may continue in the machine direction 302, arriving at a first absorbent material deposition station 320.
  • the first absorbent material deposition station 320 may include a drum 322 with a movable, foraminous forming surface.
  • a vacuum duct 324 may be located radially inwardly of the forming surface on the drum 322.
  • the vacuum duct 324 may be connected to a vacuum source, such as an exhaust fan.
  • the first absorbent material deposition station 320 may also include a forming chamber 326 through which the forming surface on the drum 322 is movable.
  • the forming chamber 326 has an entrance where the forming surface on the drum 322 enters the chamber 326 substantially free of absorbent material and also has an exit where the forming surface on the drum 322 leaves the chamber 326 substantially filled with absorbent material.
  • a fiberizer may provide fibrous material into the forming chamber 326.
  • other component materials may also be delivered into the forming chamber 326.
  • particles or fibers of superabsorbent material may be introduced into the forming chamber 326 by conventional mechanisms, such as pipes, channels, spreaders, nozzles and the like, as well as combinations thereof.
  • the vacuum source duct 324 provides a vacuum pressure relative to the interior of the chamber 326.
  • the fibrous material and the superabsorbent material are operatively carried or transported onto the first web material 310 by an entraining air stream that is drawn through the forming surface on the drum 322.
  • the forming chamber 326 can serve to direct and concentrate the air-entrained fibers and particles, and to provide a desired velocity profile in the air-entrained stream of fibers and particles.
  • the foraminous forming surface may be defined on the drum 322 by a series of forms, which are arranged end-to-end around the periphery of the forming drum 322.
  • Each form may have a substantially identical pattern in which fibrous material and superabsorbent material are deposited.
  • the patterns may correspond to a desired shape of individual absorbent cores and may repeat over the circumference of the drum 322.
  • the forming surface on the drum 322 that is carrying an air formed fibrous web 321, which includes the fibers and particles, may be moved to a release zone of the first absorbent material deposition station 320.
  • vacuum causes the web 321 to transfer from the forming surface of the drum 322 onto the first web material 310.
  • the release can be assisted by the application of air pressure from the interior of the drum 322.
  • the first web material 310 receives the formed fibrous web 321 from the forming drum 322 and conveys the web 321 to a collection area or to a location for further processing (not shown).
  • a vacuum suction box 332 may be located below the first web material 310 to remove the web 321 from the forming surface of the drum 322.
  • the vacuum box 332 may define a plenum beneath the portion of the first web material 310 in close proximity to the forming surface so that a vacuum is communicated to the fibrous web 321 on the drum 322. Removal of the web 321 can alternatively be accomplished by the weight of the web, by centrifugal force, by mechanical ejection, by positive air pressure or by some combination or by another suitable method.
  • the removed fibrous web includes an interconnected series of absorbent cores, and each body has a selected surface contour which substantially matches the contour provided by the corresponding portions of the forming surface upon which each individual pad was formed.
  • the first web material 310 and the web 321 thereon may continue in the machine direction 302, arriving at a second absorbent material deposition station 340.
  • superabsorbent material intermixes with one or more adhesives prior to depositing onto a second web material 312, for example in a mixing region, and ultimately deposits onto the second web material 312.
  • the superabsorbent material flows from a hopper 342 and through chute toward the second web material 312.
  • the hopper 342 may be a bulk solid pump or feeder configured to maintain a consistent flow of the superabsorbent material through the second absorbent material deposition station 340.
  • the flow rate of the superabsorbent material out of the hopper 342 may be adjustable such that the hopper 342 can deliver different amounts of superabsorbent material, resulting in different basis weights of superabsorbent material in the finished absorbent structures 301 .
  • Such differences in basis weights of superabsorbent material may allow the formed absorbent structures 301 to be used in different absorbent end uses - such as in diapers, feminine articles, adult care garments, bandages and the like.
  • the chute may be oriented such that the superabsorbent material exits the chute falling substantially in a vertical direction.
  • the superabsorbent material may preferably be fed through the second absorbent material deposition station 340 by gravity, without any pneumatic force.
  • other application methods for the superabsorbent material from the chute may also be used.
  • a "sheet” or “stream” of superabsorbent material may flow from the chute towards the second web material 312.
  • adhesive applicators 344 may spray adhesive toward the falling superabsorbent material.
  • the adhesive intermixes with the falling superabsorbent material prior to the mixture of the superabsorbent material and the adhesive depositing onto the second web material 312. Two or more adhesive applicators 344 may be used for each stream of superabsorbent material.
  • a deposited mixture 346 of adhesives and superabsorbent material forms.
  • the adhesive may operate to immobilize the superabsorbent material onto the second web material 312.
  • vacuum energy may optionally be applied to the second web material 312.
  • the second web material 312 may be supported by a forming surface - such as a forming belt or forming drum as is typical in the art.
  • Vacuum energy may be applied to the forming surface such that air is drawn through the forming surface from the side where the second web material 312 is located. Accordingly, the second web material 312, along with the mixture 346 as the mixture 346 is falling toward the second web material 312, may be drawn to the forming surface due to the applied vacuum energy.
  • Such vacuum energy may help to control the spread of the mixture 346 as it is falling toward the second web material 312, thereby helping to form a relatively more uniform absorbent structure 301 .
  • a third web material 314 may further be applied to the deposited mixture 346.
  • the combination of the second web material 312, the deposited mixture 346, and the third web material 314 may be applied to the first web material 310 and the web 321.
  • the combination of the second web material 312, the deposited mixture 346, and the third web material 314 may be adhered to the first web material 310 and the web 321 to form an absorbent assembly 316.
  • the absorbent assembly 316 may pass through a folder 350 to fold the first web material 310 around the other portions of the absorbent assembly 316.
  • the absorbent assembly 316 may also pass through one or more nip stations 360 to help compress the components together.
  • the nip station 360 may apply a pressure to the combination of the first web material 310, the web 321 , the second web material 312, the deposited mixture 346, and the third web material 314 to help further connect the deposited mixtures to the web materials 310, 312, 314.
  • FIGS. 13 and 18 depicts step performed in a particular order for purposes of illustration and discussion. Those of ordinary skill in the art, using the disclosures provided herein, will understand that the steps of any of the methods discussed herein may be adapted, rearranged, expanded, omitted, or modified in various ways without deviating from the scope of the present disclosure.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Un article absorbant comprend une doublure côté corps, une protection externe et un ensemble noyau absorbant disposé entre la doublure côté corps et la protection externe. L'ensemble noyau absorbant comprend une couche superabsorbante avec des particules superabsorbantes. Une couche mixte est disposée entre une couche non tissée et la doublure côté corps. La couche mixte comprend des particules superabsorbantes et des fibres de duvet de cellulose. Une enveloppe non tissée est disposée autour de la couche superabsorbante et de la couche mixte.
PCT/US2024/022336 2024-03-29 2024-03-29 Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide Pending WO2025207111A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2024/022336 WO2025207111A1 (fr) 2024-03-29 2024-03-29 Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2024/022336 WO2025207111A1 (fr) 2024-03-29 2024-03-29 Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide

Publications (1)

Publication Number Publication Date
WO2025207111A1 true WO2025207111A1 (fr) 2025-10-02

Family

ID=97218042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2024/022336 Pending WO2025207111A1 (fr) 2024-03-29 2024-03-29 Noyau absorbant doté d'une couche d'absorption de fluide et d'une couche de réservoir de fluide

Country Status (1)

Country Link
WO (1) WO2025207111A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1196122B1 (fr) * 1999-05-21 2006-09-13 Yuhan-Kimberly Ltd. Intensificateur d'absorption de liquides
US20190046368A1 (en) * 2013-09-19 2019-02-14 The Procter & Gamble Company Absorbent cores having material free areas
CN109803620B (zh) * 2016-10-31 2021-06-25 宝洁公司 具有包括通道和后口袋的中间层的吸收制品
US20220142829A1 (en) * 2019-03-18 2022-05-12 Ontex Bv Absorbent articles having an anisotropic foam acquisition layer
EP4190287A1 (fr) * 2021-12-03 2023-06-07 Ontex BV Article absorbant sans danger pour l'environnement et son procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1196122B1 (fr) * 1999-05-21 2006-09-13 Yuhan-Kimberly Ltd. Intensificateur d'absorption de liquides
US20190046368A1 (en) * 2013-09-19 2019-02-14 The Procter & Gamble Company Absorbent cores having material free areas
CN109803620B (zh) * 2016-10-31 2021-06-25 宝洁公司 具有包括通道和后口袋的中间层的吸收制品
US20220142829A1 (en) * 2019-03-18 2022-05-12 Ontex Bv Absorbent articles having an anisotropic foam acquisition layer
EP4190287A1 (fr) * 2021-12-03 2023-06-07 Ontex BV Article absorbant sans danger pour l'environnement et son procédé de fabrication

Similar Documents

Publication Publication Date Title
CN102711692B (zh) 超薄吸收制品
EP3052064B1 (fr) Procédé de formation d'une structure absorbante
JPH09501579A (ja) ドライ／ウエット保全性が改良された吸収材製品
US9216117B2 (en) Absorbent article with point fusion bonding
WO2016207444A1 (fr) Nouvel article absorbant comportant une couche d'acquisition/de distribution et son procédé de fabrication
US10813798B2 (en) Absorbent composite including swellable absorbent fibers
US20240139043A1 (en) Multi-layer absorbent cores and methods of manufacture
US20130261583A1 (en) Absorbent Article
WO2019066915A1 (fr) Article absorbant ayant des propriétés améliorées d'absorption et de rétention des fluides
US20050148964A1 (en) Absorbent structure having profiled stabilization
AU2019457379B2 (en) Multi-layer absorbent cores and methods of manufacture
CN114126562B (zh) 多层吸收芯及其制造方法
CN121532155A (zh) 吸收芯和包括其的吸收制品
US12569372B2 (en) Absorbent article with fluid control features
WO2026024611A9 (fr) Partie centrale absorbante dotée d'une couche d'absorption de fluide et d'une couche de réservoir de fluide
WO2026024611A1 (fr) Partie centrale absorbante dotée d'une couche d'absorption de fluide et d'une couche de réservoir de fluide
CN223438766U (zh) 分区型复合吸收芯体和具有其的吸收性衣服
AU2024221106A1 (en) A nonwoven material with hollow spunbond multicomponent fibers
RU2799805C1 (ru) Многослойные впитывающие сердцевины и способы изготовления
WO2025155295A1 (fr) Article absorbant à cavités de noyau absorbant
CN122070115A (en) Absorbent article with fluid control features
WO2025136410A1 (fr) Article absorbant à brins élastiques répartis
WO2019066920A1 (fr) Article absorbant ayant des propriétés améliorées d'absorption et de rétention des fluides
JP2021137382A (ja) 吸収性物品の製造方法および製造装置
WO2019066917A1 (fr) Article absorbant à gestion de fluide améliorée

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24929421

Country of ref document: EP

Kind code of ref document: A1