WO2003061541A2 - Matiere fibreuse a charge particulaire fonctionnelle elevee - Google Patents

Matiere fibreuse a charge particulaire fonctionnelle elevee Download PDF

Info

Publication number
WO2003061541A2
WO2003061541A2 PCT/US2003/001252 US0301252W WO03061541A2 WO 2003061541 A2 WO2003061541 A2 WO 2003061541A2 US 0301252 W US0301252 W US 0301252W WO 03061541 A2 WO03061541 A2 WO 03061541A2
Authority
WO
WIPO (PCT)
Prior art keywords
previous
gsm
sap
weight percent
lanes
Prior art date
Application number
PCT/US2003/001252
Other languages
English (en)
Other versions
WO2003061541A3 (fr
Inventor
Jacek K. Dutkiewicz
Michael Kalmon
Brian E. Boehmer
Original Assignee
Bki Holding Corporation
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 Bki Holding Corporation filed Critical Bki Holding Corporation
Priority to EP03705787A priority Critical patent/EP1465569A2/fr
Priority to US10/501,696 priority patent/US20050153615A1/en
Priority to CA002473524A priority patent/CA2473524A1/fr
Publication of WO2003061541A2 publication Critical patent/WO2003061541A2/fr
Publication of WO2003061541A3 publication Critical patent/WO2003061541A3/fr

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
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • 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
    • A61F13/531—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 a homogeneous composition through the thickness of the pad
    • A61F13/532—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 a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/5323—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 a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets
    • 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
    • A61F13/535—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 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/407—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing absorbing substances, e.g. activated carbon
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • 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
    • A61F2013/53051—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 only in particular parts or specially arranged
    • A61F2013/530547—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 only in particular parts or specially arranged positioned in a separate layer or layers
    • A61F2013/530562—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 only in particular parts or specially arranged positioned in a separate layer or layers being arranged in discontinuous pattern
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]

Definitions

  • Absorbent articles such as disposable diapers, adult incontinence pads, sanitary napkins, panty liners and the like, are generally provided with an absorbent core to receive and retain body liquids.
  • the absorbent core is usually sandwiched between a liquid pervious top sheet, whose function is to allow the passage of fluid to the core, and a liquid impervious backsheet, whose function is to contain the fluid and to prevent it from passing through the absorbent article to the garment of the wearer of the absorbent article.
  • An absorbent core for diapers and adult incontinence pads frequently includes fibrous batts or webs constructed of defiberized, loose, fluffed, hydrophilic, cellulosic fibers.
  • the core may also include a layer or stratum containing superabsorbent polymer (SAP) particles, granules, flakes or fibers, often referred to as the storage layer or stratum.
  • SAP superabsorbent polymer
  • Such an article may be obtained by decreasing the thickness of the diaper core, by reducing the amount of fibrous material used in the core while increasing the amount of SAP particles, and by calendering or pressing the core to reduce caliper and hence, increase density.
  • Such higher density cores do not absorb liquid as rapidly as lower density cores because the compacting of the core (densification) results in smaller effective pore size. Accordingly, to maintain suitable liquid absorption, it is necessary to provide a lower density layer having a larger pore size above the high-density absorbent core to increase the rate of uptake of liquid discharged onto the absorbent article.
  • the low-density layer is typically referred to as an acquisition layer.
  • Multiple layer absorbent core designs involve a more complicated manufacturing process.
  • the storage layer portion of a disposable diaper for example is generally formed in place, during the converting process, from loose, fluffed cellulose.
  • Such cellulose material is generally not available in preformed roll form because it exhibits insufficient web strength, owing to its lack of interfiber bonding or entanglement, to be unwound directly onto and handled in absorbent pad-making equipment.
  • Ultra-thin feminine napkins are generally produced from roll-goods based nonwoven material. Such a roll of preformed absorbent core material is unwound directly onto the absorbent article converting equipment without the defiberization step required for fluff- based products, such as diapers and incontinence pads.
  • the nonwoven web is typically bonded or consolidated in a fashion that gives it sufficient strength to be handled in the converting process. These webs may also contain SAP particles.
  • (D) a basis weight of from about 100 gsm to about 1000 gsm.
  • (E) a density of from about 0.15 g/cc to about 3 g/cc, the material having
  • the material comprises from about 0.1 weight percent to about 10 weight percent total binder which comprises a first binder, a second binder, and, optionally, a third binder, where each binder can be the same as or different from any other binder.
  • the material may further comprise (H) a carrier, which may be a cellulosic tissue carrier or a synthetic material.
  • the material may further comprise (I) a layer consisting essentially of (a) synthetic fibers, and
  • this invention is a nonwoven material with a pliability of about 400 1/N or greater comprising from about 75 to about 95 weight percent SAP.
  • this invention is a process for the production of a material comprising depositing on a removable support, a carrier or on a carrier on a support a mixture of SAP, fibers and binder, where the material comprises from about 60 weight percent to about 95 weight percent SAP and has a pliability of about 400 1/N or greater.
  • Prefened aspects are those wherein:
  • a second layer of SAP is deposited in discrete lanes on the web of (c) in the machine direction, the lanes being spaced apart in the cross machine direction, where the SAP lanes of the second layer are not superimposed on the SAP lanes of the first layer when viewed from a thickness direction Z at right angles to the X and Y directions,
  • this invention includes an absorbent core having: (1) a material of one referred to above in combination with
  • the absorbent core may two of the materials of the invention or one or more of the materials of the invention in combination with a conventional unitary core, an acquisition distribution structure or some other structure. Structures of this type may be referred to as DUOCORE structures, the conventional aspects of which are generally described in WO 00/41882, which is hereby incorporated by reference in its entirety.
  • the material of the invention as well as a core of this type can be produced in a continuous process which is a series of unit operations, preferably including unit operations involving airlaying of fibrous mixtures through individual airlaying heads.
  • the absorbent core may also be produced with adhesives in a conventional converting operation.
  • the materials of this invention and cores containing them are useful in various fields including us in absorbent products in the form of a diaper, training pant, incontinent device, feminine hygiene device, surgical drape, wound dressing, or cable wrap.
  • Figure 1 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, forming particle-free zones or spaces.
  • Figure 2 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, forming particle-free zones or spaces. Here the lanes are offset from the lanes of the stratum of Fig. 1.
  • Figure 3 is a cross-sectional view of a fibrous web or article made according to the present invention showing alternating matrix fiber strata and functional particle strata.
  • Figure 4 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, wherein the lanes are S-shaped.
  • Figure 5 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, wherein the lanes are hourglass- shaped.
  • Figure 6 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, wherein the lanes are circle-shaped.
  • Figure 7 is a top view of a functional particle stratum made according to the present invention, showing multiple lanes of particle material, wherein the lanes are intermittent.
  • Figure 8 schematically shows a production line for a method of forming absorbent articles comprising an absorbent core according to the present invention.
  • Figure 8a is a cross- sectional view of the production line of Figure 8.
  • Figure 9 is a schematic view of a lane divider.
  • Figure 10 is a schematic view of a test apparatus for acquisition/rewet/wicking distance test.
  • Figure 11 is a schematic view of the folding of an absorbent core of the present invention. DETAILED DESCRIPTION OF THE INVENTION
  • the present invention is directed to a stratified fibrous web which comprises a plurality of functional particle strata.
  • Each functional particle stratum includes lanes or zones of functional particles, and each lane or zone is separated from an adjacent lane or zone.
  • Adjacent functional particle strata are oriented such that when viewing the web in the Z- direction, the functional particle lane or zone of one functional particle stratum does not directly overlay, or superimpose, a functional particle lane or zone from the next adjacent functional particle stratum.
  • the lanes or zones for a first functional particle strata are offset from the lanes or zones of the next adjacent functional particle strata.
  • Fig. 1 there is shown a top view of a functional particle stratum.
  • the structures of the present invention are prepared using airlaid technology.
  • the Figures show the structures of the present invention as elongated in the MD or machine direction, also referred to as the Y-direction.
  • Stratum 2 of Fig. 1 includes a plurality of lanes 6 and 8 extending longitudinally in the Y-direction. Each lane includes functional particles. The edges 10 of stratum 2 are free of functional particles. Between each lane are spaces 14, also free of functional particles. Stratum 2 may be applied over another functional particle stratum or over another stratum not containing functional particles. Referring to Fig. 2, a second functional particle stratum 4 is shown. This stratum also includes longitudinally extending lanes of functional particles.
  • the lanes are positioned such that when stratum 2 is applied over stratum 4 the lanes will not superimpose, when viewed in the Z-direction. Similarly, the lanes of stratum 2 will not superimpose over the lanes of stratum 4, even when an intervening stratum not containing functional particles is placed between strata 2 and 4.
  • the spaces 14 between lanes in strata 2 and 4 preferably are substantially free of functional particles, fibers or any other material.
  • non-unctional material such as fibers may be provided between the lanes. During the manufacturing process, some minor portion of the particles may migrate from the lanes to the spaces before the fibers are fixed in place by curing of fibers, without adverse effect.
  • FIG. 3 there is shown a cross-section (taken in the X-direction) of a multistrata structure according to the present invention including a plurality of functional particle strata.
  • a first stratum 16 not containing functional particles, and preferably containing matrix fibers and a binder is provided.
  • stratum 4 including lanes 12 of functional particles with spaces 14 between the lanes free of particles or fibers.
  • Stratum 18 is provided over stratum 4.
  • Stratum 2 is then positioned over stratum 18 such that lanes 6 and 8 of the stratum do not superimpose on the lanes of stratum 4. Again, it is preferred that spaces 14 of stratum 2 are free of particles or fibers.
  • Stratum 20 is provided over stratum 2.
  • the resultant multistrata structure includes alternating strata of fibers and functional particles, such that the lanes of functional particles are substantially surrounded by fibers.
  • the lateral edges of the multistrata structure of Fig. 3 are optionally provided with an edge seal as described in PCT application WO 00/71790 the disclosure of which is hereby incorporated by reference.
  • the multistrata structure of Fig. 3 may itself be included with other strata in a unitary multilayer structure, to provide for example, a structure having specified fluid acquisition, distribution and storage capabilities.
  • lanes of the functional particle strata are shown in Figs. 1-3 as being parallel and extending continuously in the MD or Y-direction of the strata.
  • lanes or zones may be arranged in other ways suitable to the present invention.
  • the lanes can remain as parallel but the particles may be provided intermittently to provide lane segments with gaps between the segments, as shown in Fig. 7.
  • the lanes can be applied in a S-shape in the longitudinal direction with S-shaped spaces between the lanes, as shown in Fig. 4.
  • the lanes may be hour-glass shaped, as shown in Fig. 5.
  • Other patterns may be used as well, such as circle- shaped (Fig. 6).
  • each functional particle stratum contain both lanes containing functional particles and spaces not containing functional particles, and the pattern must be arranged such that lanes or zones of a first functional particle stratum will not superimpose over the lanes or zones of a second next adjacent functional particle stratum. Notwithstanding the foregoing, superimposition of a small percentage (less than 15%) of the area of lanes or zones, is considered to meet this definition.
  • the preferred amount of coverage of a given functional particle stratum by the functional particles depends upon the application and the thickness, density and other parameters of the particles. Generally, it is preferred that the lanes of the stratum cover at least 30% and preferably 40% and most preferably 50% of the X-Y area of the stratum.
  • the functional particle lane is intended to receive particles, flakes, powder, granules, or the like.
  • the particles may include any functional powder or other particles having a particle diameter of up to 3,000 microns ( ⁇ ).
  • the particle area may include a particle loading of from 2 to 2,000 gsm (grams per square meter), more preferably from 2 to 1,000 gsm, even more preferably from 10 to 600 gsm, and most preferably from 100 to 250 gsm.
  • the particles may be superabsorbent polymers ("SAP") or other functional material.
  • SAP superabsorbent polymers
  • suitable particles include odor control agents, e.g., zeolites or calcium carbonate, fragrances, detergents and the like.
  • a superabsorbent polymer is a water soluble compound that has been cross-linked to render it water insoluble but still swellable to at least about 15 times its own weight in physiological saline solution.
  • These superabsorbent materials generally fall into three classes, namely starch graft copolymers, cross-linked carboxymethylcellulose derivatives, and modified hydrophilic polyacrylates.
  • examples of absorbent polymers include hydrolyzed starch-acrylontrile graft co-polymer, saponified acrylic acid ester-vinyl co-polymer, modified cross-linked polyvinyl alcohol, neutralized cross-linked polyacrylic acid, cross-linked polyacrylate salt, and carboxylated cellulose.
  • the preferred superabsorbent materials upon absorbing fluids, form hydrogels.
  • the superabsorbent polymer materials have relatively high gel volume and relatively high gel strength as measured by the shear modulus of the hydrogel. Such preferred materials also contain relatively low levels of polymeric materials which can be extracted by contact with synthetic urine.
  • Superabsorbent polymers are well-known and are commercially available.
  • One example is a starch graft polyacrylate hydrogel marketed under the name Ml 000 (Hoechst-Celanese, Portsmouth, VA).
  • Fibers suitable for use in the structures of the present invention may include cellulosic or synthetic fibers or blends thereof. Most preferred is wood cellulose. Also preferred is cotton linter pulp, chemically modified cellulose such as crosslinked cellulose fibers and highly purified cellulose fibers, such as Buckeye HPF (each available from Buckeye Technologies Inc., Memphis, Tennessee). The fluff fibers may be blended with synthetic fibers, for example polyester such as PET, nylon, polyethylene or polypropylene.
  • the fiber-containing strata may also include thermoplastic binding material, which may be blended with the cellulosic or synthetic fibers.
  • Suitable thermoplastic binding material includes thermoplastic fibers, such as bicomponent thermoplastic fibers ("bico").
  • Prefened thermoplastic binding fibers provide enhanced adhesion for a wide range of materials, including synthetic and natural fibers, particles, and synthetic and natural carrier sheets.
  • An exemplary thermoplastic bico fiber is Celbond Type 255 Bico fiber from Hoechst Celanese.
  • thermoplastic fibers include polypropylenes, polyesters, nylons and other olefins, or modifications thereof.
  • a preferred thermoplastic fiber is FiberVisions type AL-Adhesion-C Bicomponent Fiber, which contains a polypropylene core and an activated copolyolefin sheath.
  • the invention contemplates two separate binder applications.
  • the binder is applied to the structure so as to contact only the particle free area or lane, which is adjacent the areas or lanes containing the particles disposed between the first and second layers.
  • the binder may be applied in the form of a spray, foam, or mist.
  • the binders are diluted to contain 3 to 25 % solids, more preferably 6 to 12% solids, most preferably 10%.
  • a binder which is diluted to have a relatively high solids content (such as 10%) is ideal for acting in the highly compacted, small pore environment of the particle free area, wherein the seals are formed. The environment results in fast wicking, and the high solids content reduces migration of the binder to the other areas of the web.
  • the second binder application involves application of a binder, in the form of a foam, spray or mist, to substantially the entire surface of the structure (as an "overall binder"), in order to reduce dust-off on the exterior and interior of the structure.
  • the overall binders are diluted to contain 1 to 20 % solids, more preferably 2 to 10% solids, even more preferably 2 to 4% solids, and most preferably about 3.5% solids. While the binder will penetrate to reduce dust-off and to immobilize the functional particles, it will not provide a significant contribution to the structural integrity of the web.
  • the fibers of the structures of the present invention may be fixed in place to provide integrity to the structure using heat-activated fibers or other binding agents.
  • a thermoplastic binding material is used and seals are formed when the structure is compacted or densified by pressure or pressure and heat.
  • the seals may be further strengthened by subsequent curing in a curing oven. It is preferred to use thermoplastic fibers as the binder fiber, and heat as the curing agent. Heat can be applied to cure the fibers at the end of the airlaying process, or alternatively, periodically at various stages of the process.
  • the sealing may be provided by the application of a liquid binder (or binder in a liquid carrier), after compacting or densification of the web.
  • seals are formed by application of a liquid binder (or a binder in a liquid carrier) in the particle free zone only, wherein the binder wicks into the densified region and forms strong seals upon drying and curing, without densification of the particle free zone.
  • seals are formed by compacting or densification of the particle-free areas, followed by application of a binder which is targeted to contact the particle-free areas, and to avoid the particle areas. The binder wicks into the densified region, and forms seals upon drying and curing.
  • the upper and lower strata each contain a thermoplastic binding material, which strengthens the seals upon densification and curing.
  • the material and structures of the invention contain a carrier tissue.
  • a compaction roll prior to the introduction of the particle areas can be used to eliminate the need for the tissue.
  • one or more forming heads of the airlaid web forming machine distributes the desired fiber for the lower layer of the absorbent structure.
  • Figure 6 depicts a process of making a fibrous web according to the present invention.
  • a carrier tissue 20a may be unwound from the supply roll 21.
  • the tissue 20a is rolled on to screen 18.
  • the tissue may alternatively be used as a carrier or as the lower stratum 16 of the absorbent article.
  • a forming head 24 of the airlaid web-forming machine distributes the desired fiber to form the lower stratum 16 of the absorbent structure.
  • Cellulosic fibers may be obtained by disintegrating or defiberizing a cellulose pulp sheet or sheets, typically by hammermill, to provide individualized fibers. The individualized fibers are then air conveyed to forming heads on the airlaid web-forming machine.
  • Cellulosic fiber and optionally thermoplastic fibers are added to the cellulose tissue 20a by forming head 24.
  • a second strata of fibers 18 is applied by forming head 34, which applies cellulosic fibers, and optionally can also apply a thermoplastic fiber such as a bicomponent fiber. Subsequent layers can be added on top of the second layer. After the second stratum is applied the web may pass under another particle applicator
  • a series of ovens is used in processes of the invention, for drying, curing or thermal bonding.
  • the air laid web 23 is heated in a second oven 54 at a temperature in the range of from 125 to 180 ° C.
  • the airlaid web 23 can be treated at pressure in the range of from 0.1 to 10 psi, preferably 1.5 psi.
  • heat seals between the thermoplastic material and the fibers of the upper and lower layers are formed.
  • the heat seals are substantially free of particles (especially SAPs), which could disrupt the heat seal upon exposure to moisture.
  • the finished web is then rolled for future use.
  • This continuous band of fibrous web can be slit or cut to form individual absorbent articles in a cutting unit, which has not been depicted in this figure.
  • the finished web may be slit or perforated at the heat seal to yield narrow slit core material having a heat seal along both edges.
  • the heat seals to be slit must be of sufficient width to provide two effective seals after slitting.
  • Example 1 Basis weight 323 gsm, Caliper 1.2 mm
  • head SAP feeder 3 52.6 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 1 52.6 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • head SAP feeder 5 54.4 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Layer 5 2.0 gsm FF, 0.8 gsm bico Between head SAP feeder 4: 54.4 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 3 54.4 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 2 54.4 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 1 54.4 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • Layer 1 6.2 gsm FF, 2.1 gsm bico Carrier: 18 gsm cellulosic tissue
  • the first pass through the three head airlaid forming system laid the materials in the amounts indicated below in reverse order, starting with Head 1 laying a FF and bico mixture on the cellulosic carrier tissue.
  • layer 4 was laid by Head 3.
  • head SAP feeder 2 127.5 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 1 127.5 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • Layer 1 (Head 1): 7.0 gsm FF, 3.0 gsm bico Carrier: 18 gsm cellulosic tissue
  • Example 5 Basis weight 383 gsm, Caliper 2.0 mm
  • the first pass through the three head airlaid forming system laid the materials in the amounts indicated below in reverse order, starting with Head 1 laying a FF and bico mixture on the cellulosic carrier tissue.
  • the second pass started with between head SAP feeder 1, followed by airlaying Layer 4 by Head 2.
  • head SAP feeder 2 71.3 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Layer 4 (Head 2): 7.0 gsm FF, 3.0 gsm bico Between head SAP feeder 1: 71.3 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Layer 3 (Head 3): 7.0 gsm FF, 3.0 gsm bico Between head SAP feeder 2: 71.3 gsm SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Degussa FAVOR® 880 SAP was used in this example.
  • a web was manufactured on the three-head Danweb airlaid machine with the SAP fed through the forming heads.
  • the raw materials used were ND416 compressible pulp, Weyerhaeuser, Tacoma WA; T-255 bicomponent fiber, 2.8 dpf, KoSa; 3024 cellulosic carrier tissue, 18 gsm, Cellu Tissue Co; T-224 polyester fiber, 15 dpf x 6 mm, KoSa; Kolon GS3500 superabsorbent polymer granules, Kolon, Korea; and Airflex 124 latex emulsion, Air Products Chemicals.
  • the basis weight was 318 gsm, and the caliper was 0.9 mm.
  • Layer 3 36.0 gsm ND416, 5.0 gsm bico, 61.3 gsm SAP, 2.0 gsm latex sprayed on top
  • pliability is the inverse of the amount of force necày to bend a sheet of material of the invention. As the force necessary to bend the sheet increases, the pliability of (he sheet decreases.
  • Pliability can be measured by the following procedure, using a Gurley tester fModel 4171 , ] 0 Gurley Precision Instruments, Troy, NY).
  • the custom clamp was designed in su h a way that it does not change the thickness of the tested material, where the material is inserted into the clamp. If the thickness is changed as a result of clamping then the properties of the structure are changed and the results obtained by using the Gurley tester are affected. In the present method, the clamp of Figure 3 is used to eliminate such undesired effects.
  • Table 1 below has data for Examples 1, 2, 4 and 5 of this invention, Comparative Example 3 and for several prior art materials which are used in commercial products.
  • the second pass started by using the structure made in the first pass as the carrier material.
  • the first head added 3.0 gsm Foley fluff and 1.0 gsm T-255 KoSa 2.8 dpf bicomponent fibers.
  • 45.0 gsm of Kolon MG2600 from Kolon Chemical company was deposited in lanes onto the web. This addition of SAP to the web was aligned so the SAP lanes in the first structure were not directly below.
  • the second forming head added a mixture of 21.5 gsm Foley fluff and 2.3 gsm T-255 KoSa 2.8 dpf bicomponent fibers. Again, 45.0 gsm of Kolon MG2600 from Kolon Chemical company was deposited in lanes onto the web.
  • the third pass started by using the structure made in the second pass as the carrier material. Only the third head was used in this pass. The third head added a mixture of 27.0 gsm Wellman 213X1 6 dpf polyester fibers and 53.0 gsm AL-Delta 6.7dtx fibers from ES Fiber Visions. The final thickness was reached by compaction of the web to 2.5 mm. The basis weight was 332 gsm.
  • Example 7 Basis weight 140 gsm, Caliper 2.2 mm. Pliability 868 1/N
  • This structure was produced in two individual passes through the three head airlaid line.
  • the first forming head deposited a mixture of 20.0 gsm Foley fluff and 2.0 gsm T-255 KoSa 2.8 dpf bicomponent fibers onto an 18 gsm forming tissue from
  • the second pass started by using the structure made in the first pass as the carrier material. Only the third head was used in this pass. The third head added a mixture of 17.0 gsm Wellman 213X1 6 dpf polyester fibers and 33.0 gsm AL-Delta 6.7dtx fibers from ES Fiber Visions. The final thickness was reached by compaction of the web to 2.2 mm. The basis weight was 140gsm.
  • Example 8 Absorbent Core Thickness 4.12mm, Pliability 116 1/N
  • An absorbent core was made by joining the material of Example 7 as an upper layer ASP (acquisition and storage ply) with the material of Example 5 as a lower layer DSP (distribution and storage ply) in a DUOCORE absorbent core structure.
  • the materials were joined by means of a polymer spray adhesive, Super 77 available from 3M, St. Paul, MN.
  • the area of the ASP was less than that of the DSP.
  • An alternative version of this core with no adhesive was made as part of the acquisition time test procdure which follows.
  • Plastic insult tube 3.8 cm inside diameter (ID) x 15.2 cm long (1.5 in ID x 6 in).
  • Foam 40.6 cm long x 10.2 cm wide x 3.8 cm high (16 in x 4 in x 1.5 in).
  • the foam should have a hole cut into it. The center of the hole should be located 10.2 cm from one of the ends (lengthwise) and centered widthwise. The hole should have a diameter just large enough to accommodate insertion of the plastic insult tube.
  • the foam should be covered with flexible plastic sheeting and sealed in any appropriate way (heat seal, wate ⁇ roof tape, etc.) such that a wate ⁇ roof barrier is created around the foam.
  • Foam can be purchased from Scott Fabrics, Memphis, TN. Gray weight plates, 40.6 cm long x 10.2 cm wide (16 in x 4 in). The plates should weigh 2.9 kg (6.4 lb) to achieve a 0.69 kPa (0.1 psi) load. Each plate should have a hole the same size and at the same location as the hole in the foam piece.
  • Black weight plate 40.6 cm long x 10.2 cm wide (16 in x 4 in), weighing enough to achieve a 0.69 kPa (0.1 psi) load when the foam is used in conjunction with the plate.
  • the plate should have a hole the same size and at the same location as the hole in the foam piece.
  • Plastic board 20.3 cm x 43.2 cm (8 in x 17 in).
  • Coverstock material polypropylene spunbond treated with a durable hydrophilic finish, 22 gsm.
  • the coverstock material can be purchased from Avgol Nonwoven Industries, Holon,
  • Blotter paper Grade S-22, cut to 40.6 cm long x 10.2 cm wide (16 in x 4 in).
  • the Grade S-22 paper can be purchased from Buckeye Technologies, Memphis, TN. Ruler graduated in millimeters. Cylinder, graduated in tenths of milliliters.
  • the stopwatch With the stopwatch in one hand and the graduated cylinder containing 75 ml of saline solution in the other hand, prepare to insult the sample. Pour the fluid into the plastic insult cylinder. Start the stopwatch at the moment the fluid strikes the sample. Empty the fluid from the graduated cylinder as quickly as possible. Stop the stopwatch when the fluid is absorbed by the sample.
  • the rewet expressed in grams, is the difference between the wet weight of the papers and the dry weight of the papers.
  • Example 9 Absorbent Core Thickness 4.83 mm, Pliability 135 1/N
  • Patent applications with serial numbers and filing dales 09/21 1 , 35 filed 12/15/98; 09/232,783 filed 1/19/99; 09/719,338 filed 1/17/01; 09/475,850 filed 12/30/99; 09/469,930 filed 12/21/99; 0 ⁇ /578,603 filed 5/25/00; 05/593.409 filed 6/14/00: 09025,764 filed 6/8/99 allowed; 09/774,248 filed 1/30/01; and 09/854,179 filed 5/11 '01, all of which aie hereby inco ⁇ orated by reference in their entirety.
  • FOLEY FLUFF® southern softwood bleached kraft fluff pulp, Buckeye Technologies Inc.
  • Treated FOLEY FLUFF® as described in U.S. Patent Application serial no. 09/469,930 filed 12/21/99, available from Buckeye Technologies Inc. under the brand name CARESSA(TM),
  • head SAP feeder 2 Between head SAP feeder 2: 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Layer 2 (Head 2): 6.5 gsm FF, 2.5 gsm bico Between head SAP feeder 1 : 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart Layer 1 (Head 1): 11 gsm FF, 5.0 gsm bico Carrier: 18 gsm cellulosic
  • head SAP feeder 2 98 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 2 Between head SAP feeder 2: 78.3 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart. (the SAP lanes formed under SAP feeder 2 and the SAP lanes formed under SAP feeder 1 do not superimpose)
  • head SAP feeder 1 78.3 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • head SAP feeder 2 Between head SAP feeder 2: 78.3 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart. (the SAP lanes formed under SAP feeder 2 and the SAP lanes formed under SAP feeder 1 do not superimpose)
  • head SAP feeder 1 78.3 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 1 78.3 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • Layer 3 (Head 3): 12.0 gsm SW-16, 5.0 gsm bico
  • head SAP feeder 2 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart. (the SAP lanes formed under SAP feeder 2 and the SAP lanes formed under SAP feeder 1 do not superimpose)
  • head SAP feeder 1 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart Layer 1 (Head 1): 11 gsm SW-16, 5.0 gsm bico Carrier: 18 gsm cellulosic * Overall basis weight
  • Table 4 illustrate the effect of the Treated FOLEY FLUFF® on the performance of the Absorbent System 1 composed of the topsheet, curly- fiber layer, airlaid insert, fluff and poly backsheet. As seen from the data, the acquisition of Example 15 with Treated
  • FOLEY FLUFF® was significantly faster than the acquisition of Example 11 with FOLEY
  • the width of the airlaid inserts was 13 cm and their length was 66 cm.
  • Table 5 illustrate the effect of the Treated FOLEY FLUFF® and C-folding on the performance of the Absorbent System 2 composed of the topsheet, curly- fiber layer, airlaid insert, fluff and poly backsheet.
  • the acquisition of the C-folded Example 15 with Treated FOLEY FLUFF® was significantly faster than the acquisition of the C-folded Example 11 with FOLEY FLUFF®.
  • FLUFF®fibers had also improved capacity over the sample with FOLEY FLUFF®.
  • Raw materials FOLEY FLUFF®, southern softwood bleached kraft fluff pulp, Buckeye Technologies Inc.
  • Carrier 10 gsm Avgol hydrophilic nonwoven ca ier, Avgol, Israel SAP: Stockhausen Zl 102 superabsorbent polymer granules, Degussa, USA
  • head SAP feeder 2 Between head SAP feeder 2: 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • head SAP feeder 1 94 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart
  • Carrier 10 gsm Avgol nonwoven
  • head SAP feeder 2 100 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart. (the SAP lanes formed under SAP feeder 2 and the SAP lanes formed under SAP feeder 1 do not superimpose)
  • head SAP feeder 1 100 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart Layer 1 (Head 1): 84 gsm FF, 1.5 gsm bico Canier: 10 gsm Avgol nonwoven
  • head SAP feeder 2 100 gsm* SAP, placed in 1.27 cm lanes, spaced 1.27 cm apart.
  • Layer 2 (Head 2): 6.5 gsm FF, 1.5 gsm bico

Landscapes

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

Abstract

L'invention concerne des articles absorbants fibreux contenant des particules utilisés pour fabriquer des couches jetables, des garnitures d'incontinence pour adulte, des serviettes hygiéniques et analogue. L'invention concerne plus particulièrement une bande fibreuse multistrate comprenant une pluralité de premières strates composées de fibres de matrice et de fibres thermoplastiques, et une pluralité de secondes strates composées de particules fonctionnelles agencées en bandes séparées. Les premières et secondes strates sont disposées en alternance sur la bande et les bandes de secondes strates sont agencées de sorte que les bandes adjacentes aux secondes strates ne se superposent pas.
PCT/US2003/001252 2002-01-18 2003-01-15 Matiere fibreuse a charge particulaire fonctionnelle elevee WO2003061541A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03705787A EP1465569A2 (fr) 2002-01-18 2003-01-15 Matiere fibreuse a charge particulaire fonctionnelle elevee
US10/501,696 US20050153615A1 (en) 2002-01-18 2003-01-15 Fibrous material with high functional particle load
CA002473524A CA2473524A1 (fr) 2002-01-18 2003-01-15 Matiere fibreuse a charge particulaire fonctionnelle elevee

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US35032402P 2002-01-18 2002-01-18
US60/350,324 2002-01-18
US37341002P 2002-04-16 2002-04-16
US60/373,410 2002-04-16

Publications (2)

Publication Number Publication Date
WO2003061541A2 true WO2003061541A2 (fr) 2003-07-31
WO2003061541A3 WO2003061541A3 (fr) 2004-02-26

Family

ID=27616770

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/001252 WO2003061541A2 (fr) 2002-01-18 2003-01-15 Matiere fibreuse a charge particulaire fonctionnelle elevee

Country Status (5)

Country Link
US (1) US20050153615A1 (fr)
EP (1) EP1465569A2 (fr)
CA (1) CA2473524A1 (fr)
TW (1) TW583001B (fr)
WO (1) WO2003061541A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1388334A1 (fr) * 2002-08-09 2004-02-11 Uni-Charm Corporation Article jetable pour l'absorption de sécrétions corporelles
EP2658497A2 (fr) * 2010-12-28 2013-11-06 Kimberly-Clark Worldwide, Inc. Article absorbant avec composite de stimulation
WO2016115181A1 (fr) * 2015-01-12 2016-07-21 Buckeye Technologies Inc. Structure non-tissée à haute performance

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006013988A1 (de) * 2006-03-22 2007-09-27 Concert Gmbh Faserverstärkter Thermoplast
US20110189911A1 (en) * 2007-01-10 2011-08-04 Ritesh Mehbubani High loft nonwoven sheet material and method of construction thereof
US9549858B2 (en) * 2010-01-06 2017-01-24 Ching-Yun Morris Yang Ultra-thin absorbent article
AU2015202516B2 (en) * 2010-01-06 2017-03-09 Mcneil-Ppc, Inc. Ultra-thin absorbent article
US9302248B2 (en) 2013-04-10 2016-04-05 Evonik Corporation Particulate superabsorbent polymer composition having improved stability
US9375507B2 (en) 2013-04-10 2016-06-28 Evonik Corporation Particulate superabsorbent polymer composition having improved stability
GB201407056D0 (en) * 2014-04-22 2014-06-04 Essentra Filter Products Dev Co Pte Ltd Smoking article
CN108313660B (zh) * 2017-01-16 2024-05-03 北京想象无限科技有限公司 用于吸收体的定向系统及定向方法

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596567A (en) * 1984-08-17 1986-06-24 Personal Products Company Perf-embossed absorbent structure
WO1995022952A1 (fr) * 1994-02-24 1995-08-31 Mölnlycke AB Corps absorbant et appareil pour sa fabrication
WO1996003947A1 (fr) * 1994-08-01 1996-02-15 The Procter & Gamble Company Absorbant comprenant deux couches de gel, l'une superieure et l'autre inferieure
US5601542A (en) * 1993-02-24 1997-02-11 Kimberly-Clark Corporation Absorbent composite
US5836929A (en) * 1993-06-30 1998-11-17 The Procter & Gamble Company Absorbent articles
WO1999032165A1 (fr) * 1997-12-23 1999-07-01 Kimberly-Clark Worldwide, Inc. Composite de pate a papier et de materiau superabsorbant, ameliorant les performances d'absorption
WO1999047094A1 (fr) * 1998-03-19 1999-09-23 Weyerhaeuser Company Procede d'elaboration d'un composite cannele
WO2000041882A1 (fr) * 1999-01-11 2000-07-20 Bki Holding Corporation Structure a hautes performances
WO2000071790A1 (fr) * 1999-05-25 2000-11-30 Bki Holding Corporation Materiau fibreux multifonctions avec scellement ameliore des bords
EP1077051A1 (fr) * 1999-08-16 2001-02-21 Johnson & Johnson Inc. Serviette hygiénique mince flexible
EP1088537A2 (fr) * 1999-09-29 2001-04-04 Japan Absorbent Technology Institute Feuille fortement hydrophile et son procédé de fabrication
WO2001035886A1 (fr) * 1999-11-19 2001-05-25 Bki Holding Corporation Parties centrales absorbantes a gradient de densite y
EP1116479A2 (fr) * 2000-01-12 2001-07-18 Japan Absorbent Technology Institute Couches absorbantes pour incontinents
WO2002049685A2 (fr) * 2000-12-21 2002-06-27 Kimberly-Clark Worldwide, Inc. Composites stratifies pour produits d'hygiene personnelle

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596567A (en) * 1984-08-17 1986-06-24 Personal Products Company Perf-embossed absorbent structure
US5601542A (en) * 1993-02-24 1997-02-11 Kimberly-Clark Corporation Absorbent composite
US5836929A (en) * 1993-06-30 1998-11-17 The Procter & Gamble Company Absorbent articles
WO1995022952A1 (fr) * 1994-02-24 1995-08-31 Mölnlycke AB Corps absorbant et appareil pour sa fabrication
WO1996003947A1 (fr) * 1994-08-01 1996-02-15 The Procter & Gamble Company Absorbant comprenant deux couches de gel, l'une superieure et l'autre inferieure
WO1999032165A1 (fr) * 1997-12-23 1999-07-01 Kimberly-Clark Worldwide, Inc. Composite de pate a papier et de materiau superabsorbant, ameliorant les performances d'absorption
WO1999047094A1 (fr) * 1998-03-19 1999-09-23 Weyerhaeuser Company Procede d'elaboration d'un composite cannele
WO2000041882A1 (fr) * 1999-01-11 2000-07-20 Bki Holding Corporation Structure a hautes performances
WO2000071790A1 (fr) * 1999-05-25 2000-11-30 Bki Holding Corporation Materiau fibreux multifonctions avec scellement ameliore des bords
EP1077051A1 (fr) * 1999-08-16 2001-02-21 Johnson & Johnson Inc. Serviette hygiénique mince flexible
EP1088537A2 (fr) * 1999-09-29 2001-04-04 Japan Absorbent Technology Institute Feuille fortement hydrophile et son procédé de fabrication
WO2001035886A1 (fr) * 1999-11-19 2001-05-25 Bki Holding Corporation Parties centrales absorbantes a gradient de densite y
EP1116479A2 (fr) * 2000-01-12 2001-07-18 Japan Absorbent Technology Institute Couches absorbantes pour incontinents
WO2002049685A2 (fr) * 2000-12-21 2002-06-27 Kimberly-Clark Worldwide, Inc. Composites stratifies pour produits d'hygiene personnelle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1388334A1 (fr) * 2002-08-09 2004-02-11 Uni-Charm Corporation Article jetable pour l'absorption de sécrétions corporelles
US7015370B2 (en) 2002-08-09 2006-03-21 Uni-Charm Corporation Disposable wearing article for fluid distribution having filled void, density gradient and spacer members
EP2658497A2 (fr) * 2010-12-28 2013-11-06 Kimberly-Clark Worldwide, Inc. Article absorbant avec composite de stimulation
EP2658497A4 (fr) * 2010-12-28 2015-02-25 Kimberly Clark Co Article absorbant avec composite de stimulation
WO2016115181A1 (fr) * 2015-01-12 2016-07-21 Buckeye Technologies Inc. Structure non-tissée à haute performance
KR20170106993A (ko) 2015-01-12 2017-09-22 조지아-퍼시픽 넌우븐스 엘엘씨 고성능 부직포 구조물
CN107405241A (zh) * 2015-01-12 2017-11-28 佐治亚-太平洋无纺布有限责任公司 高性能非织造结构
CN107405241B (zh) * 2015-01-12 2021-12-10 佐治亚-太平洋Mt.哈利有限责任公司 高性能非织造结构

Also Published As

Publication number Publication date
WO2003061541A3 (fr) 2004-02-26
EP1465569A2 (fr) 2004-10-13
TW583001B (en) 2004-04-11
US20050153615A1 (en) 2005-07-14
TW200302112A (en) 2003-08-01
CA2473524A1 (fr) 2003-07-31

Similar Documents

Publication Publication Date Title
CA2372937C (fr) Materiau absorbant multifonctions avec scellement ameliore des bords
US5589117A (en) Integrated absorbent structures with density and liquid affinity gradients and methods for making the same
US7176149B2 (en) High-performance absorbent structure
AU761200B2 (en) Unitary fluid acquisition, storage, and wicking material
EP0301772A2 (fr) Matériaux non tissés
CA2391528A1 (fr) Parties centrales absorbantes a gradient de densite y
US20050153615A1 (en) Fibrous material with high functional particle load
AU748366B2 (en) Absorbent structures having fluid distribution and storage layers
CA2334343A1 (fr) Structure unitaire absorbante renfermant un polymere ultra-absorbant
MXPA00012252A (en) Absorbent structures having fluid distribution and storage layers

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2473524

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 10501696

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2003705787

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 200408021

Country of ref document: ZA

WWP Wipo information: published in national office

Ref document number: 2003705787

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP

WWW Wipo information: withdrawn in national office

Ref document number: 2003705787

Country of ref document: EP