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WO2025002575A1 - Doublure anti-adhésive et emballage pour article hygiénique - Google Patents

Doublure anti-adhésive et emballage pour article hygiénique Download PDF

Info

Publication number
WO2025002575A1
WO2025002575A1 PCT/EP2023/068029 EP2023068029W WO2025002575A1 WO 2025002575 A1 WO2025002575 A1 WO 2025002575A1 EP 2023068029 W EP2023068029 W EP 2023068029W WO 2025002575 A1 WO2025002575 A1 WO 2025002575A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibres
sanitary article
natural
sheet
reinforcing
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/EP2023/068029
Other languages
English (en)
Inventor
Annika Dahl
Jan WÄSTLUND-KARLSSON
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.)
Essity Hygiene and Health AB
Original Assignee
Essity Hygiene and Health AB
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 Essity Hygiene and Health AB filed Critical Essity Hygiene and Health AB
Priority to PCT/EP2023/068029 priority Critical patent/WO2025002575A1/fr
Priority to ARP240101685A priority patent/AR133119A1/es
Publication of WO2025002575A1 publication Critical patent/WO2025002575A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/551—Packaging before or after use
    • A61F13/5513—Packaging before or after use packaging of feminine sanitary napkins
    • A61F13/55135—Packaging before or after use packaging of feminine sanitary napkins before use
    • A61F13/5514—Packaging before or after use packaging of feminine sanitary napkins before use each item packaged single
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • 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
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F2013/51002—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads with special fibres
    • A61F2013/51004—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads with special fibres characterized by the length of the 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
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F2013/51002—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads with special fibres
    • A61F2013/51019—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads with special fibres being cellulosic material

Definitions

  • the present application relates to a release liner and a wrapper for a sanitary article, such as a sanitary napkins or panty liner.
  • Disposable sanitary articles such as sanitary napkins and panty liners, are intended to be worn in underwear.
  • the disposable sanitary article is commonly provided with adhesive region(s) on the backsheet, to attach the sanitary article to the underwear.
  • the adhesive region(s) provided on the disposable sanitary article is protected by a release liner covering the adhesive regions during manufacturing, storage, and handling of the sanitary article.
  • Release liners are commonly made of plastic material. There is however a need for more sustainable solutions.
  • a sanitary article such as a sanitary napkin or a pantiliner
  • the sanitary article comprising a topsheet and a backsheet, the sanitary article extending in a longitudinal direction and in a transverse direction, the sanitary article having a first and a second longitudinal side edge, a front edge and a rear edge, the backsheet being provided with a coated adhesive region, the coated adhesive region being releasably attached to a release liner and the release liner comprising a sheet of material, wherein the sheet of material comprises natural fibres in mixture with reinforcing fibres, the reinforcing fibres having a greater length-weighted average fibre length than the natural fibres.
  • a release liner made from a sheet of material comprising natural fibres in mixture with reinforcing fibres, wherein the reinforcing fibres have a greater length-weighted average fibre length than the natural fibres, provides a sustainable solution to the above-mentioned needs.
  • the disposable sanitary article may be a sanitary napkin or panty liner.
  • the sanitary article may comprise an absorbent core between the topsheet and the backsheet.
  • Disposable sanitary articles are well known in the art and therefore not described more in detail herein. Any disposable sanitary article could be used with the release liner of the present invention.
  • the coated adhesive region may cover all or part(s) of an outer surface, i.e., a garment-facing surface, of the disposable sanitary article, for example in the form of stripes across said surface.
  • the material may comprise 50 to 99 wt%, preferably 70 to 99 wt%, more preferably 85 to 99 wt%, of the natural fibres and 1 to 50 wt%, preferably 1 to 30 wt%, more preferably 1 to 20 wt%, of the reinforcing fibres.
  • the natural fibres may be natural cellulosic fibres, preferably wood fibres, wheat straw fibres or bamboo fibres, more preferably wood fibres.
  • the natural fibres may originate from wood pulp, non-wood plant material, and combinations thereof.
  • the origin of the natural fibres may for example be selected from chemical pulp, such as sulphate and sulphite pulp, organosolv pulp; recycled fibres; and/or mechanical pulp including e.g. refiner mechanical pulp (RMP), pressurized refiner mechanical pulp (PRMP), pretreatment refiner chemical alkaline peroxide mechanical pulp (P-RC APMP), thermomechanical pulp (TMP), thermomechanical chemical pulp (TMCP), high-temperature TMP (HT-TMP) RTS-TMP, alkaline peroxide pulp (APP), alkaline peroxide mechanical pulp (APMP), alkaline peroxide thermomechanical pulp (APTMP), thermopulp, groundwood pulp (GW), stone groundwood pulp (SGW), pressure groundwood pulp (PGW), super pressure groundwood pulp (PGW-S), thermo groundwood pulp (TGW), thermo stone groundwood pulp (TSGW), chemimechanical pulp (CMP), chemirefinermechanical pulp (CRMP), chemithermomechanical pulp (CTMP), high-temperature CTMP (HT-CT
  • the wood fibres or wood pulp may originate from hardwood or softwood, including birch, beech, aspen such as European aspen, alder, eucalyptus, maple, acacia, mixed tropical hardwood, pine such as loblolly pine, fir, hemlock, larch, spruce such as Black spruce or Norway spruce, and mixtures thereof.
  • birch birch
  • beech aspen
  • alder alder
  • eucalyptus maple
  • acacia mixed tropical hardwood
  • pine such as loblolly pine
  • fir hemlock
  • larch spruce
  • Non-wood plant material such as seed hair fibres, leaf fibres, bast fibres, plant fibres can be provided from e.g.
  • straws of grain crops wheat straw, reed canary grass, reeds, flax, hemp, kenaf, jute, ramie, seed, sisal, abaca, coir, bamboo, bagasse, cotton kapok, milkweed, pineapple, cotton, rice, reed, esparto grass, Phalaris arundinacea, or combinations thereof.
  • wood pulp and non-wood plant material may be used.
  • the fibres or a portion of the fibres may be recycled fibres, which may belong to any or all of the above categories.
  • the fibres may have a natural staple length, such as cotton or may be cut to a desired staple length.
  • the material may comprise 50 to 99 wt%, preferably 70 to 99 wt%, more preferably 85 to 99 wt% of the natural fibres.
  • the natural fibres may have a length-weighted average fibre length of 0.5 to 5.0 mm, preferably 0.8 to 3.5 mm.
  • the material may comprise 50 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the material may comprise 70 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the material may comprise 85 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the reinforcing fibres may be of non-fossil origin.
  • the reinforcing fibres may be renewable fibers from a renewable feedstock.
  • the reinforcing fibres may be selected from polylactide (PLA) fibres, glycolic acid polymer (PGA) fibres, polyvinyl alcohol (PVA) fibres, bicomponent fibres comprising thermoplastic polymers, non-wood natural fibres, manmade cellulosic fibres, and combinations thereof.
  • Bicomponent fibres are comprised of two polymers of different chemical and/or physical properties, extruded from the same spinneret with both polymers in the same filament.
  • the non-wood natural fibres originate from non-wood plant materials as described above.
  • the reinforcing fibres may be manmade cellulosic fibres, preferably manmade fibres formed of cellulose of natural origin, more preferably manmade fibres formed of cellulose that has not been chemically modified, such as viscose, rayon or lyocell, most preferably viscose.
  • the reinforcing fibres may be manmade fibres formed of cellulose that has been chemically modified.
  • a bio-degradable release liner can be achieved by adjusting the choice of fibers in the wrapping material.
  • a plastic-free release liner can be achieved by adjusting the choice of fibers in the sheet of material.
  • the reinforcement fibres having a greater length-weighted average fibre length than the natural fibres, add flexibility, stretch, strength and functional properties, to the sheet of material.
  • the reinforcing fibres may have a length-weighted average fibre length of 3 to 100 mm, preferably 5 to 30 mm, more preferably 6 to 15 mm.
  • the material may comprise 1 to 50 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the material may comprise 1 to 30 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the material may comprise 1 to 20 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the natural fibres and reinforcing fibres may be randomly oriented. As an example this can be achieved by foam formation.
  • the sheet of material may be being a foam-formed fibrous web.
  • the sheet of material may further comprise a binder selected from the group consisting of polyvinyl alcohols, polyvinyl acetate dispersions, ethyl vinyl alcohol dispersions, polyurethane dispersions, acrylic latexes, styrene butadiene dispersions, binders based on finely divided cellulose, binders based on cellulose derivatives, biopolymers and combinations thereof, preferably acrylic latexes.
  • the binder is preferably selected from acrylic latexes, such as polyacrylate latexes or polyacrylic acid latexes, and combinations thereof, optionally in combination with polyvinylalcohol.
  • a latex binder may provide heat-sealability to the wrapping material.
  • the biopolymers may suitably be based on starch derivatives, natural gum latexes, alginates, guar gum, hemicellulose derivatives, chitin, chitosan, pectin, agar, xanthan, amylose, amylopectin, alternan, gellan, mutan, dextran, pullulan, fructan, locust bean gum, carrageenan, glycogen, glycosaminoglycans, murein, bacterial capsular polysaccharides, and the like and combinations thereof.
  • the wrapping material may comprise a binder in an amount of 0.005 to 10 wt%, preferably 0.05 to 5 wt%, more preferably 1 to 5 wt%.
  • the material may further comprise 0.1 to 10 wt% of a foaming agent.
  • the foaming agent may acs as a surface-active agent, in the manufacture of the sheet of wrapping material, as set out below.
  • the foaming agent additionally provides strength to the wrapping material formed.
  • the foaming agent may be selected from water soluble foaming polymeric agents and water dispersible foaming polymeric agents, and combinations thereof.
  • the foaming agent is selected from water soluble glycans, water dispersible glycans, water soluble hydrophilic polymers and water dispersible hydrophilic polymers, and combinations thereof.
  • the water soluble glycans and water dispersible glycans are selected from polysaccharides and derivatives thereof.
  • the water soluble hydrophilic polymers and water dispersible hydrophilic polymers are selected from poly(vinyl alcohol)s and poly(vinyl acetate)s and copolymers thereof.
  • the material may further comprise additives modifying the functional properties of the sheet, such as nanofibrillated cellulose, microfibrillated cellulose, starch, resins etc., as well as colorants etc.
  • additives modifying the functional properties of the sheet such as nanofibrillated cellulose, microfibrillated cellulose, starch, resins etc., as well as colorants etc.
  • the sheet of material may have a basis weight of 20 to 40 g/m 2 , preferably 25 to 35 g/m 2 .
  • the sheet of material may have an air permeability of 0 to 1000 l/m 2 /s, i.e up to 1000 l/m 2 /s.
  • the sheet of material may have a stretch, in other words elongation at break, of 0,5 to 7 %. Stretch is measured using the method ISO 1924-2:2008.
  • the sheet of material may have a friction coefficient of 0,1 -0,2.
  • the sheet of material may have a release coating, the adhesive coating of the disposable hygiene article being releasably attached to the release coating.
  • the release force of the release coating may be 4.5 to 5.0 N/m as determined with the method described below.
  • the release coating typically comprises silicone, for example in the form of a polyorganosiloxane-polyamide copolymer or a polydimethylsiloxane-urea copolymer.
  • a primer may be present between the sheet of material and the release coating.
  • the release coating may cover all or part(s) of the sheet of material.
  • the release liner may have a rectangular shape.
  • a rectangular release liner is more cost efficient and puts less requirement on positioning of the release liner onto the backsheet of the sanitary article.
  • the adhesive coating on the backsheet of the sanitary article may be a pressure sensitive adhesive.
  • This disclosure also covers a sanitary article, wherein the sanitary article is folded along at least one transversal folding axes, and the folded sanitary article is arranged in a wrapper, the wrapper comprising a sheet of wrapping material being folded such as to enclose the sanitary article, and wherein the sheet of wrapping material comprises natural fibres in mixture with reinforcing fibres, the reinforcing fibres having a greater length-weighted average fibre length than the natural fibres.
  • the wrapper is sealed to enclose the sanitary article by means of mechanical sealing, such as embossing or ultrasonic welding, by heat sealing, by an adhesive, or by a combination thereof.
  • the sheet of wrapping material is the same as the sheet of material used as a release liner as disclosed above.
  • the material may comprise 50 to 99 wt%, preferably 70 to 99 wt%, more preferably 85 to 99 wt%, of the natural fibres and 1 to 50 wt%, preferably 1 to 30 wt%, more preferably 1 to 20 wt%, of the reinforcing fibres.
  • the natural fibres may be natural cellulosic fibres, preferably wood fibres, wheat straw fibres or bamboo fibres, more preferably wood fibres.
  • the natural fibres may originate from wood pulp, non-wood plant material, and combinations thereof.
  • the origin of the natural fibres may for example be selected from chemical pulp, such as sulphate and sulphite pulp, organosolv pulp; recycled fibres; and/or mechanical pulp including e.g. refiner mechanical pulp (RMP), pressurized refiner mechanical pulp (PRMP), pretreatment refiner chemical alkaline peroxide mechanical pulp (P-RC APMP), thermomechanical pulp (TMP), thermomechanical chemical pulp (TMCP), high-temperature TMP (HT-TMP) RTS-TMP, alkaline peroxide pulp (APP), alkaline peroxide mechanical pulp (APMP), alkaline peroxide thermomechanical pulp (APTMP), thermopulp, groundwood pulp (GW), stone groundwood pulp (SGW), pressure groundwood pulp (PGW), super pressure groundwood pulp (PGW-S), thermo groundwood pulp (TGW), thermo stone groundwood pulp (TSGW), chemimechanical pulp (CMP), chemirefinermechanical pulp (CRMP), chemithermomechanical pulp (CTMP), high-temperature CTMP (HT-CT
  • the wood fibres or wood pulp may originate from hardwood or softwood, including birch, beech, aspen such as European aspen, alder, eucalyptus, maple, acacia, mixed tropical hardwood, pine such as loblolly pine, fir, hemlock, larch, spruce such as Black spruce or Norway spruce, and mixtures thereof.
  • birch birch
  • beech aspen
  • alder alder
  • eucalyptus maple
  • acacia mixed tropical hardwood
  • pine such as loblolly pine
  • fir hemlock
  • larch spruce
  • Non-wood plant material such as seed hair fibres, leaf fibres, bast fibres, plant fibres can be provided from e.g.
  • straws of grain crops wheat straw, reed canary grass, reeds, flax, hemp, kenaf, jute, ramie, seed, sisal, abaca, coir, bamboo, bagasse, cotton kapok, milkweed, pineapple, cotton, rice, reed, esparto grass, Phalaris arundinacea, or combinations thereof.
  • wood pulp and non-wood plant material may be used.
  • the fibres or a portion of the fibres may be recycled fibres, which may belong to any or all of the above categories.
  • the fibres may have a natural staple length, such as cotton or may be cut to a desired staple length.
  • the material may comprise 50 to 99 wt%, preferably 70 to 99 wt%, more preferably 85 to 99 wt% of the natural fibres.
  • the natural fibres may have a length-weighted average fibre length of 0.5 to 5.0 mm, preferably 0.8 to 3.5 mm.
  • the material may comprise 50 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the material may comprise 70 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the material may comprise 85 to 99 wt% of natural fibres having a length-weighted average fibre length of 0.5 to 5 mm or 0.8 to 3.5 mm.
  • the reinforcing fibres may be of non-fossil origin.
  • the reinforcing fibres may be renewable fibers from a renewable feedstock.
  • the reinforcing fibres may be selected from polylactide (PLA) fibres, glycolic acid polymer (PGA) fibres, polyvinyl alcohol (PVA) fibres, bicomponent fibres comprising thermoplastic polymers, non-wood natural fibres, manmade cellulosic fibres, and combinations thereof.
  • Bicomponent fibres are comprised of two polymers of different chemical and/or physical properties, extruded from the same spinneret with both polymers in the same filament.
  • the non-wood natural fibres originate from non-wood plant materials as described above.
  • the reinforcing fibres may be manmade cellulosic fibres, preferably manmade fibres formed of cellulose of natural origin, more preferably manmade fibres formed of cellulose that has not been chemically modified, such as viscose, rayon or lyocell, most preferably viscose.
  • the reinforcing fibres may be manmade fibres formed of cellulose that has been chemically modified.
  • a bio-degradable wrapper can be achieved by adjusting the choice of fibers in the wrapping material.
  • a plastic-free wrapper can be achieved by adjusting the choice of fibers in the sheet of material.
  • the reinforcement fibres having a greater length-weighted average fibre length than the natural fibres, add flexibility, stretch, strength and functional properties, to the sheet of material.
  • the reinforcing fibres may have a length-weighted average fibre length of 3 to 100 mm, preferably 5 to 30 mm, more preferably 6 to 15 mm.
  • the material may comprise 1 to 50 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the material may comprise 1 to 30 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the material may comprise 1 to 20 wt% of reinforcing fibres having a length-weighted average fibre length of 3 to 100 mm or 5 to 30 mm or 6 to 15 mm.
  • the natural fibres and reinforcing fibres may be randomly oriented. As an example this can be achieved by foam formation.
  • the sheet of material may be being a foam-formed fibrous web.
  • the sheet of material may further comprise a binder selected from the group consisting of polyvinyl alcohols, polyvinyl acetate dispersions, ethyl vinyl alcohol dispersions, polyurethane dispersions, acrylic latexes, styrene butadiene dispersions, binders based on finely divided cellulose, binders based on cellulose derivatives, biopolymers and combinations thereof, preferably acrylic latexes.
  • the binder is preferably selected from acrylic latexes, such as polyacrylate latexes or polyacrylic acid latexes, and combinations thereof, optionally in combination with polyvinylalcohol.
  • a latex binder may provide heat-sealability to the wrapping material.
  • the biopolymers may suitably be based on starch derivatives, natural gum latexes, alginates, guar gum, hemicellulose derivatives, chitin, chitosan, pectin, agar, xanthan, amylose, amylopectin, alternan, gellan, mutan, dextran, pullulan, fructan, locust bean gum, carrageenan, glycogen, glycosaminoglycans, murein, bacterial capsular polysaccharides, and the like and combinations thereof.
  • the wrapping material may comprise a binder in an amount of 0.005 to 10 wt%, preferably 0.05 to 5 wt%, more preferably 1 to 5 wt%.
  • the material may further comprise 0.1 to 10 wt% of a foaming agent.
  • the foaming agent may acs as a surface-active agent, in the manufacture of the sheet of wrapping material, as set out below.
  • the foaming agent additionally provides strength to the wrapping material formed.
  • the foaming agent may be selected from water soluble foaming polymeric agents and water dispersible foaming polymeric agents, and combinations thereof.
  • the foaming agent is selected from water soluble glycans, water dispersible glycans, water soluble hydrophilic polymers and water dispersible hydrophilic polymers, and combinations thereof.
  • the water soluble glycans and water dispersible glycans are selected from polysaccharides and derivatives thereof.
  • the water soluble hydrophilic polymers and water dispersible hydrophilic polymers are selected from poly(vinyl alcohol)s and poly(vinyl acetate)s and copolymers thereof.
  • the material may further comprise additives modifying the functional properties of the sheet, such as nanofibrillated cellulose, microfibrillated cellulose, starch, resins etc., as well as colorants etc.
  • additives modifying the functional properties of the sheet such as nanofibrillated cellulose, microfibrillated cellulose, starch, resins etc., as well as colorants etc.
  • the sheet of wrapping material suitable for a wrapper, may have a basis weight of 10 to 50 g/m 2 , preferably 15 to 30 g/m 2 .
  • the sheet of wrapping material may have an air permeability of 0 to 1000 l/m2/s.
  • the sheet of wrapping material may have a stretch, in other words elongation at break, of 0,5 to 7 %. Stretch is measured using the method ISO 1924-2:2008. Preferably, the sheet of wrapping material has an elongation at break of 0,5 to 7 %.
  • the sheet of wrapping material may have a friction coefficient of 0,1 -0,2.
  • the wrapper typically has two longitudinal edges and two transversal folding axes, the transversal folding axes dividing the wrapper into a first region, a second region and a third region, and the wrapper being folded about said folding axes with the first region, the second region and the third region in an overlapping configuration.
  • Overlapping regions of the wrapper are typically joined by seals along the longitudinal edges of the wrapper.
  • the seals may be formed by mechanical sealing, such as embossing or ultrasonic welding, by heat sealing, by an adhesive, or by a combination thereof.
  • a heat-sealing agent is suitably present along the longitudinal edges of the wrapper, preferably between the sheet of wrapping material and any release coating.
  • the wrapper may be provided with a heat-seal coating, being provided fully or partially to the inner surface of the wrapper.
  • the sheet of material may be obtained by a method utilizing foam-based production technology.
  • the sheet of material may be obtained by a method utilizing foam-based production technology, followed by finalizing by a method utilizing surface treating technology.
  • the sheet of material may be manufactured by a method comprising the steps of - forming at least one foamed dispersion by dispersing fibres comprising natural fibres and reinforcement fibres in a foam or foamable liquid comprising water and at least one foaming agent to obtain fibre-foam,
  • the foam or foamable liquid comprises at least one binder; or the formed sheet is finalized before or after drying by treating the surface of the sheet with at least one binder; or the foam or foamable liquid comprises at least one binder, and the formed sheet is finalized before or after drying by treating the surface of the sheet with at least one binder.
  • the manufacturing of the sheet of wrapping material used as a wrapper is the same as described above.
  • Figure 1 shows a sanitary article and a release liner
  • Figure 2 shows a wrapper comprising a sanitary article.
  • Figure 1 shows a sanitary article 1 having a top topsheet 2 and a backsheet 7.
  • the backsheet 7 is provided with a coated adhesive region, the coated adhesive region being releasably attached to a release liner 6.
  • the release liner 6, made of a sheet of material as described herein, has a top surface 3 facing the sanitary article 1 .
  • the top surface 3 has a release coating, and the coated adhesive region of the sanitary article 1 is releasably attached to the release coating.
  • the release liner is rectangular in this example but may also be the size of the backsheet 7 such as to fully cover the backsheet 7, i.e. have the same outer contour as the backsheet.
  • Figure 2 shows a wrapper without showing the sanitary article enclosed by the wrapper.
  • the wrapper 4 is shown after folding of the wrapper 4 in an overlapping configuration and after overlapping regions of the wrapper 4 have been joined along the longitudinal edge zones 5 of the wrapper 4.
  • the wrapper 4 comprises a sheet of wrapping material 21 as disclosed herein, having an inner surface and an outer surface.
  • the inner surface has two longitudinal edge zones 5 and two transversal folding axes.
  • the wrapper 5 is folded along the two transversal folding axes, thereby dividing the wrapper 4 into a first region, a second region and third region folded in an overlapping configuration.
  • the sheet of wrapping material is provided with as adhesive to seal the wrapper 4 along the longitudinal edges.
  • the longitudinal edge zones 5 may also be sealed with other sealing means such as heat-sealing or embossing.
  • Test method designed for advanced fiber analysis allows for measurement of L(l) [mm] Length-weighed mean fiber length.
  • the fibers are dissolved in water and circulated through a measuring cell where a high-definition camera takes 30 images per second.
  • the camera collects approximately 2000 images during a measurement and a software performs an image analysis to calculate the different fiber parameters. Measurements are fully compliant with ISO 16065-2.
  • the release force (N/m) of a release coating or release liner is evaluated against a standard tape with designation 50110, manufactured by the Tesa company (Hamburg, Germany).
  • the tape is 25 mm wide, 0.3 mm thick, and consists of a 145 mesh acrylate coated fabric with natural rubber as adhesive material. When used for testing, the tape should be maximum one year old.
  • the tape is stored in the dark in a climate of approximately 23 °C and 50 % relative humidity.
  • the release liner is removed from the sanitary article.
  • the release liner, or the sheet of wrapping material having a release coating is then conditioned for at least 2 hours in a laboratory environment set to 23 °C ⁇ 1 °C and 50 % rh ⁇ 5%. Subsequent testing takes place in similar environment.
  • the side of the release liner, or of the sheet of wrapping material, that faces the adhesive region on the sanitary article is aligned against the sticky side of the 25 mm wide tape, gently and without undue pressure.
  • the length direction of the tape should coincide with the longitudinal direction of the release liner or sheet of wrapping material (identical to the longitudinal direction of the sanitary article).
  • About one centimeter of the tape protrudes outside of the longitudinal edge of the release liner, and a strip of conventional office printing paper (25 mm wide and about 10 cm long) is attached onto the protruding tape (as a grip area for the subsequent insertion into the tensile tester clamps).
  • a sample, prepared as above, is then placed with the tape side upwards on a flat, smooth, and hard surface.
  • a uniform pressure of 8.3 kPa (85 g/cm 2 ), suitably from a metal weight with a flat bottom, is then applied over the 25 mm wide tape for 20 hours. The pressure is then removed, and the sample rests unloaded for 4 more hours before testing.
  • a conventional tensile tester (such as available from the Zwick/Roell, Instron or Lloyd companies), equipped with a sensitive load cell (suitably 10 N) and two vertically aligned clamps (wider than 25 mm) is used for the test.
  • a sensitive load cell suitable for 10 N
  • two vertically aligned clamps wider than 25 mm
  • a fixation plate is placed behind (and together with) the sample in the lower clamp (this can be a metal plate about 1 mm thick and at least as high and wide as tested sample). The fixation plate keeps the non-delaminated part of the sample in a vertical position during testing, providing a 180° angle for the delamination interface.
  • the office paper strip (extending into the tape) is inserted into the upper grip.
  • the weight of the sample is tared (zeroed), and the upper grip is then set to move at a speed of 300 mm/min.
  • the release liner or sheet of wrapping material should delaminate (separate) completely from the tape.
  • the encountered force in Newtons, is continuously registered throughout the delamination.
  • a mean force (arithmetic average) is then calculated for the close sequence of measurement points along the delaminated distance. In this, the first and the last 10 mm of delamination should be disregarded to minimize effects from sample distortions in the two extreme positions.
  • the output from the test (Newtons for the 25 mm tested width) is reported on a Newton per 1 meter width (N/m) basis, according to the formula below.
  • a release force in the context of this invention is the arithmetic mean from a measurement of 10 individual release liners or sheets of wrapping material (i.e. a mean from the means obtained from the individual samples).
  • the release liners or sheets of wrapping material are taken from representative sanitary articles.
  • the release force can also be measured on release liner or wrapping material taken directly from the supply roll.
  • Determination of tensile properties Determination of stretch, or elongation at break, is measured by the standard test method ISO 1924-2. Constant rate of elongation 20mm/min and sample dimensions: 15(w)x300(l) mm.
  • the NWSP 70.1 Air Permeability test method covers the measurement of the air permeability of materials. The rate of flow of air passing perpendicularly through a given area of fabric is measured at a given pressure difference across the fabric test area over a given time period. Chosen method settings: 20cm2, test pressure: 200Pa. Used equipment: TEXTTEST instruments: FX 3300 LabAir (mark 4).
  • the test method is designed for determination of the friction coefficient of different materials (e.g. plastic films, nonwovens) under well-defined conditions. Processability; the materials friction against steel is measured, to simulate the behaviour in process. A sample of the material is attached to a sledge. By means of a tensile tester the sample is allowed to slide over a friction table with a well-defined surface, and the force is registered.
  • Equipment Instron, with a crosshead speed of 100mm/min.
  • Tear resistance is the maximum force [mN] which is measured when the tearing of the test material occurs when a pendulum tears the material at a 90 degree angle and speed in an Elmendorf tester with a 200g pendulum. Method is according to standard method ASTM D1922-78.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Epidemiology (AREA)
  • Textile Engineering (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (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

L'invention concerne un article hygiénique (1), tel qu'une serviette hygiénique ou un protège-slip, comprenant une feuille de dessus (2) et une feuille de dos (7) et s'étendant dans une direction longitudinale (L) et dans une direction transversale (T). L'article hygiénique (1) a un premier et un second bord latéral longitudinal, un bord avant et un bord arrière, la feuille de dos (7) étant pourvue d'une région adhésive revêtue, la région adhésive revêtue étant fixée de manière amovible à une doublure antiadhésive (6). La doublure antiadhésive (6) comprend une feuille de matériau, la feuille de matériau (2) comprenant des fibres naturelles en mélange avec des fibres de renforcement, les fibres de renforcement ayant une longueur de fibre moyenne pondérée en longueur supérieure à celle des fibres naturelles.
PCT/EP2023/068029 2023-06-30 2023-06-30 Doublure anti-adhésive et emballage pour article hygiénique Pending WO2025002575A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2023/068029 WO2025002575A1 (fr) 2023-06-30 2023-06-30 Doublure anti-adhésive et emballage pour article hygiénique
ARP240101685A AR133119A1 (es) 2023-06-30 2024-06-28 Envoltorio desmontable para artículo sanitario

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2023/068029 WO2025002575A1 (fr) 2023-06-30 2023-06-30 Doublure anti-adhésive et emballage pour article hygiénique

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WO2025002575A1 true WO2025002575A1 (fr) 2025-01-02

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AR (1) AR133119A1 (fr)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07303671A (ja) * 1994-05-11 1995-11-21 Shiseido Co Ltd 体液吸収性物品
JPH1147187A (ja) * 1997-08-01 1999-02-23 Daio Paper Corp 個装吸収性物品
EP1118316A2 (fr) * 2000-01-21 2001-07-25 Uni-Charm Corporation Article absorbant décomposable dans l'eau et procédé de fabrication
US20120016328A1 (en) * 2010-07-19 2012-01-19 Bo Shi Biodegradable films

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07303671A (ja) * 1994-05-11 1995-11-21 Shiseido Co Ltd 体液吸収性物品
JPH1147187A (ja) * 1997-08-01 1999-02-23 Daio Paper Corp 個装吸収性物品
EP1118316A2 (fr) * 2000-01-21 2001-07-25 Uni-Charm Corporation Article absorbant décomposable dans l'eau et procédé de fabrication
US20120016328A1 (en) * 2010-07-19 2012-01-19 Bo Shi Biodegradable films

Also Published As

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