EP0850037A1 - Verbundfliesstoff, seine herstellung und seine verwendung für absorbierende hygieneartikel - Google Patents

Verbundfliesstoff, seine herstellung und seine verwendung für absorbierende hygieneartikel

Info

Publication number
EP0850037A1
EP0850037A1 EP96930220A EP96930220A EP0850037A1 EP 0850037 A1 EP0850037 A1 EP 0850037A1 EP 96930220 A EP96930220 A EP 96930220A EP 96930220 A EP96930220 A EP 96930220A EP 0850037 A1 EP0850037 A1 EP 0850037A1
Authority
EP
European Patent Office
Prior art keywords
nonwoven material
permeable
composite
composite nonwoven
material according
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.)
Withdrawn
Application number
EP96930220A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Koczab
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.)
Avgol Ltd
Original Assignee
Avgol Ltd
SCA Molnlycke AB
Molnlycke Vafveri 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 Avgol Ltd, SCA Molnlycke AB, Molnlycke Vafveri AB filed Critical Avgol Ltd
Publication of EP0850037A1 publication Critical patent/EP0850037A1/de
Withdrawn legal-status Critical Current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
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51121—Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • 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
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15406—Basis weight
    • 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
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15934—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven
    • A61F2013/15959—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven by spunbond technique
    • 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
    • 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 with special fibres
    • A61F2013/51023—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 with special fibres being polymeric fibres
    • A61F2013/51033—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 with special fibres being polymeric fibres being hydrophilic
    • 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
    • A61F2013/51059—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 being sprayed with chemicals
    • A61F2013/51066—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 being sprayed with chemicals for rendering the surface hydrophilic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
    • A61F2013/51178—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers with the combination of nonwoven webs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
    • A61F2013/51182—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers with non-continuous bonding
    • 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
    • A61F2013/530131—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 being made in fibre but being not pulp
    • A61F2013/530226—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 being made in fibre but being not pulp with polymeric fibres
    • A61F2013/530233—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 being made in fibre but being not pulp with polymeric fibres being thermoplastic fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—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 characterised by the connection of the absorbent layers with each other or with the outer layers
    • A61F2013/5395—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 characterised by the connection of the absorbent layers with each other or with the outer layers with thermoplastic agent, i.e. softened by heat
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components
    • 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]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/666—Mechanically interengaged by needling or impingement of fluid [e.g., gas or liquid stream, etc.]
    • Y10T442/667—Needled
    • 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]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/668—Separate nonwoven fabric layers comprise chemically different strand or fiber material

Definitions

  • the present invention relates to a composite nonwoven material which when used as a surface veil or in addition to the surface veil as a strip in the crotch area, above the absorbent pad in an absorbent hygiene article, such as a diaper or an incontinence pad, improves the speed of passage of urine through this nonwoven material towards the absorbent pad while limiting the flow of urine to the skin.
  • user rewetting
  • absorbent hygiene articles such as diapers and incontinence pads, include an outer layer or sheet of material impermeable to bodily fluids, such as urine, and an inner surface layer or veil permeable to body fluids, between which is placed a cushion or mattress of absorbent material.
  • This veil of surface permeable to bodily fluids aims to isolate the skin from the moistened absorbent cushion. Consequently, the surface veil must have a suitable degree of softness, and must ensure rapid passage of the urine towards the absorbent pad while forming an obstacle to the return of urine to the skin of the user.
  • Document FR-A-2 588 285 describes a multilayer nonwoven fabric having at least two layers of nonwoven web, one of the layers being formed of fibers of bilobed cross section and
  • SUBSTITUTE SHEET (RULE 26) the other layer being formed of three-lobed cross-section fibers.
  • Each layer of veil is preferably obtained by the spun bonded technique and the two layers of veil are combined to form the multilayer nonwoven by thermal bonding in compacted and discontinuous zones.
  • Document WO 87/07117 describes an absorbent hygiene article comprising an absorbent body surrounded by an envelope.
  • This envelope or surface veil consists of two layers of nonwoven material.
  • the first layer of nonwoven material in contact with the skin of the user, consists of a thin layer of fibrous fabric bonded to the spinning and of a hydrophobic material, and the second layer in contact with the absorbent body is a hydrophobic fibrous layer of fusion bonded fiber fabric, similar in construction to the first layer.
  • These two layers of surface veil are not linked together in the zone intended to come into contact with the body of the user.
  • WO 88/05269 relates to a surface veil for a disposable absorbent article composed of at least two layers of nonwoven which may be identical or different and which are joined by lines of adhesive forming an open pattern.
  • Document FR-A-2 698 385 describes a composite nonwoven material comprising at least one layer composed of a nonwoven permeable to body fluids, and on this first layer, a web of carded type fibers, permeable to fluids bodily, the web of carded type fibers being linked to the first layer by a switch.
  • This composite nonwoven material can be used as a surface fleece in an absorbent hygiene article.
  • the present invention therefore aims to provide a composite nonwoven material having a desired degree of softness, as well as a speed of passage through liquids and an improved rewetting resistance, compared to the prior nonwovens described above. and used heretofore to form the surface veils of absorbent hygiene articles.
  • the present invention also aims to provide an absorbent hygienic article such as diapers and incontinence pads preferably comprising a formed surface veil of such a composite nonwoven material, the manufacturing cost of which is reduced due to the characteristics of said composite nonwoven material.
  • the present invention also aims to provide a method of manufacturing such a composite nonwoven material.
  • a composite nonwoven material comprising two outer layers of a nonwoven permeable to body fluids between which is disposed a sheet of synthetic fibers permeable to body fluids, characterized in that at least the outer layers are joined together by thermofusion according to a pattern forming a network of points and that they also comprise a perforated central zone.
  • the two outer layers of nonwoven are constituted by natural or synthetic textile fibers chosen from cellulose, viscose, polyester, polyethylene, polypropylene, nylon or ethylene-propylene copolymer fibers.
  • the intermediate ply is of the carded type or with unbound continuous filaments, consisting of synthetic textile fibers of polyester, polyethylene, polypropylene, nylon or ethylene-propylene copolymers.
  • the outer layers and the intermediate layer can advantageously have a grammage of between 5 and
  • the upper external nonwoven layer has a longitudinal hydrophilic central zone, delimited by continuous weld lines formed between at least the two external layers, forming barriers to the transverse diffusion of body fluids.
  • Another object of the present invention is constituted by an absorbent hygienic article, such as a diaper, which comprises an outer layer impermeable to bodily fluids, an absorbent pad permeable to bodily fluids which is attached to this outer layer and a surface veil permeable to bodily fluids covering the absorbent cushion and fixed to the external layer, the surface veil consisting of the composite material according to the invention described above, the upper external layer of the nonwoven provided with a hydrophilic central zone constituting the layer intended to be in contact first with bodily fluids therefore with the body of the user.
  • the invention also relates to an absorbent hygiene article comprising an outer layer impermeable to body fluids, an absorbent pad permeable to body fluids and attached to the outer layer, and having two opposite widened end portions and a crotch area more narrow, a strip of crotch area permeable to body fluids, of width similar to the crotch area of the cushion and of length similar to the cushion, and a veil of surface permeable to bodily fluids and attached to the outer layer, the strip of crotch zone being made of the composite nonwoven material according to the invention, the upper outer layer of nonwoven provided with a hydrophilic central zone being oriented so as to be in contact first with body fluids or immediately after the surface veil.
  • the crotch zone strip is disposed between the absorbent pad and the surface veil.
  • the invention also provides a method of manufacturing a composite nonwoven material, which comprises the steps of:
  • the method comprises the step consisting in supplying the composite strip to a welding device making it possible on the one hand to produce a first pair of continuous weld lines symmetrical with respect to the longitudinal central axis of the strip, between at least the two layers of nonwoven, near each longitudinal edge of said strip and on the other hand a second pair of continuous weld lines also symmetrical with respect to the axis longitudinal median of the strip, the transverse spacing of which is less than that of the first pair and which thus delimits a hydrophilic longitudinal central zone on the upper face of said composite nonwoven material.
  • the calendering, perforating and welding devices can be of the ultrasonic type.
  • FIG. 1 a partial top view of the composite nonwoven material according to the invention
  • FIG. 2 a schematic sectional view of the composite nonwoven material according to invention, before the calendering and welding steps
  • FIG. 3 a top view, partially cut away, of an absorbent hygiene article, such as a diaper comprising a surface veil made of the composite material according to the invention.
  • Figure 4 a sectional view taken along line IV-IV of Figure 3.
  • This material comprises first and second external layers 2, 3 of nonwoven permeable to bodily fluids, such as urine, between which is inserted a sheet of synthetic fibers 4 permeable to bodily fluids, the whole being joined by thermofusion. at least the outer layers together.
  • outer layers 2, 3 can be used for the outer layers 2, 3 in nonwoven, all types of conventional nonwovens, for example, natural or synthetic textile fibers, such as cellulose fibers, viscose, polyester, polyethylene, polypropylene, nylon or ethylene-propylene copolymers.
  • These external layers of nonwoven may consist of a nonwoven fabricated by any conventional process such as, for example, spun bonded, thermal bonding, chemical bonding, blowing air connection, spinning lacing.
  • these layers Preferably have a basis weight between 5 and 15 g / m 2 .
  • the upper outer layer 3 has a hydrophilic central zone 5 while the lower outer layer 2 can be hydrophilic or hydrophobic.
  • the ply of synthetic fibers 4, permeable to fluids, is of the carded type or made up of unbound continuous filaments, and can be made up of synthetic textile fibers such as polyester, polyethylene, polypropylene, nylon, or copolymers of ethylene-propylene. Polyester fibers are particularly recommended for their resilience and good fluid transport characteristics.
  • the ply 4 has a grammage of between 5 and 30 g / m 2 and the denier of the fibers of this ply is generally between 3 and 13. We will describe the process for manufacturing such a composite material according to the invention.
  • the cohesion of the composite nonwoven material 1 is obtained by subjecting all of the layers 2, 3 and of the ply 4, after having superimposed them and brought into contact, with a hot calendering operation so as to obtain the joining by thermofusion of at least the outer layers 2, 3 in a pattern forming a network of dots.
  • the intermediate ply 4 is made of polyester fibers, there will be no fusion of the fibers of layers 2 and 3 with the fibers of polyester, taking into account the significant differences in the melting temperatures of these polymers.
  • the layers 2 and 3 are constituted by polypropylene fibers and have a grammage of 10 g / m 2
  • the sheet 4 of polyester fibers also having a grammage of 10 g / m 2 .
  • fibers having identical or fairly close melting points for the layers and the sheet so as to obtain a fusion between the three.
  • the calendering device used is of the ultrasonic type (with a sonotrode and an anvil), the rotary anvil of which bears relief patterns intended to form the hot-melt points which may by way of example of embodiment be of cylindrical shape, with a diameter of 1 mm and arranged so as to form a stitch mesh in staggered rows with a distance between two successive points in a row of 7 mm.
  • the rotary anvil of which bears relief patterns intended to form the hot-melt points which may by way of example of embodiment be of cylindrical shape, with a diameter of 1 mm and arranged so as to form a stitch mesh in staggered rows with a distance between two successive points in a row of 7 mm.
  • other types of mesh are possible.
  • the next step in the manufacturing process is the perforation of the composite material; it is carried out by passing through a second ultrasonic device of higher power.
  • the shape of the anvil knobs used for this operation depends on the size desired for the perforations.
  • the perforations have a diameter of 1 to 2 mm and the distance between two successive perforations is 10 mm.
  • the perforation zone 6 is centered on the median longitudinal axis XX ′ of the composite material and is located inside the hydrophilic central zone 5 of the outer layer 3.
  • This perforation zone can have for example a width of 40 mm and a length of 100 mm, when it is discontinuous, as is the case in FIG. 1.
  • the pitch of this zone 6 must correspond to the manufacturing pitch of a layer - pants so as to be able to incorporate this material on the production line as a surface veil of diapers and center the perforation zone in the crotch zone of the diaper, which receives the urine.
  • first weld assembly which makes it possible to produce two first continuous longitudinal weld lines 7, at least between the external layers 2 and 3, symmetrical with respect to the axis XX ', and arranged near the longitudinal edges 8 of the composite strip 1.
  • these weld lines 7 may be sinusoidal and spaced from the longitudinal edges 8 by about 5 mm. They thus form barriers to the transverse migration of bodily fluids absorbed by the composite material 1 used as the surface veil of a diaper.
  • a second weld assembly makes it possible to produce two second continuous longitudinal weld lines 9, at least between the outer layers 2 and 3, also symmetrical with respect to the median axis XX '.
  • the distance between these two lines 9 can be for example 90 mm for a composite material 1 of 330 mm in width; these weld lines 9 delimit the hydrophilic central zone 5 of the composite material 1 and have the main function of forming a first tight barrier to the transverse diffusion of body fluids such as urine when said composite material 1 is used as a surface veil in diapers.
  • the second welding set can also be adapted to form, in addition to continuous lines, discontinuous decorative welding patterns 10, which can take shapes as diverse as those of flowers, birds, or various geometric shapes (ovals, circles, etc. .).
  • an absorbent hygiene article 1 such as a diaper, comprising an outer layer 12 of a flexible material impermeable to bodily fluids such as urine, on which is fixed an absorbent cushion 13 permeable to bodily fluids of dimension smaller than the outer layer.
  • the absorbent pad 13 is fixed to the waterproof layer 12 by any conventional means such as by gluing.
  • the outer layer 12, the absorbent pad 13 and the surface veil 14 are in the form of an hourglass comprising two relatively large opposite end portions joined by a crotch portion or area more narrow.
  • the surface veil consists of the composite nonwoven material 1 shown in FIGS. 1 and 2, and which comprises two external layers of nonwoven 2 and 3 and an intermediate layer of synthetic fibers 4.
  • the upper outer layer 3 provided with a hydrophilic central zone 9 and a perforation zone
  • a hygiene article according to the invention is thus produced which has improved properties of softness, speed of crossing of body fluids and barrier to rewetting.
  • the composite material according to the invention is preferably used in the form of a crotch zone strip having a width similar to that of the crotch zone of the absorbent cushion and a length similar to that of this cushion.
  • the crotch zone strip made of the composite material according to the invention is preferably placed between the conventional surface veil and the absorbent pad, so that the upper outer layer 3 of nonwoven comes into direct contact with the surface veil.

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP96930220A 1995-09-15 1996-09-06 Verbundfliesstoff, seine herstellung und seine verwendung für absorbierende hygieneartikel Withdrawn EP0850037A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9511067 1995-09-15
FR9511067A FR2738845B1 (fr) 1995-09-15 1995-09-15 Materiau non-tisse composite, son procede de fabrication et son application a tout article d'hygiene absorbant
PCT/FR1996/001366 WO1997009952A1 (fr) 1995-09-15 1996-09-06 Materiau non-tisse composite, son procede de fabrication et son application a tout article d'hygiene absorbant

Publications (1)

Publication Number Publication Date
EP0850037A1 true EP0850037A1 (de) 1998-07-01

Family

ID=9482777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96930220A Withdrawn EP0850037A1 (de) 1995-09-15 1996-09-06 Verbundfliesstoff, seine herstellung und seine verwendung für absorbierende hygieneartikel

Country Status (6)

Country Link
US (1) US6204210B1 (de)
EP (1) EP0850037A1 (de)
JP (1) JP2001503336A (de)
AU (1) AU6934596A (de)
FR (1) FR2738845B1 (de)
WO (1) WO1997009952A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030093046A1 (en) * 2001-11-14 2003-05-15 Kim Hyungbyum Cover sheet for personal care products
US20030131919A1 (en) * 2001-12-28 2003-07-17 King Timothy James Method for simultaneously imprinting a pattern and bonding cellulose webs using ultrasonic energy
JP4278963B2 (ja) † 2002-03-26 2009-06-17 ユニ・チャーム株式会社 吸収性物品
CN107072850A (zh) * 2014-11-06 2017-08-18 宝洁公司 预应变层合体及其制备方法
JP7025172B2 (ja) 2017-10-12 2022-02-24 ユニ・チャーム株式会社 吸収性物品用伸縮性シート及びそれを使用した吸収性物品

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Publication number Priority date Publication date Assignee Title
JPS5855789B2 (ja) * 1979-08-07 1983-12-12 花王株式会社 生理用ナプキンの外包材
CA1198887A (en) * 1981-08-24 1986-01-07 Howard A. Whitehead Fluid pervious thermoplastic containing web with fused barrier lines positioned in registry on the web
AU588057B2 (en) 1985-10-07 1989-09-07 Kimberly-Clark Worldwide, Inc. Multilayer nonwoven fabric
US4762521A (en) * 1986-04-11 1988-08-09 Kimberly-Clark Corporation Absorbent garment with quilted and conformable absorbent pad
SE453557C (sv) 1986-05-27 1990-04-23 Moelnlycke Ab For engangsanvendning avsett vetskeabsorberande alster, sasom en bloja, en dambinda eller liknande
SE456213B (sv) 1987-01-19 1988-09-19 Moelnlycke Ab For engangsbruk avsett absorberande alster, sasom en bloja, en dambinda , ett inkontinensskydd, ett forband eller liknande
US5009651A (en) * 1988-09-06 1991-04-23 Kao Corporation Surface material for sanitary articles and its preparing method
US5257982A (en) * 1990-12-26 1993-11-02 Hercules Incorporated Fluid absorbing article utilizing a flow control cover sheet
FR2698385B1 (fr) * 1992-11-20 1995-02-10 Peaudouce Matériau non tissé composite et son application à tout article d'hygiène absorbant.
JP2963289B2 (ja) * 1992-11-30 1999-10-18 ユニ・チャーム株式会社 体液吸収性物品の表面シート
JPH07299093A (ja) * 1994-05-10 1995-11-14 Uni Charm Corp 体液吸収性着用物品
US5704101A (en) * 1995-06-05 1998-01-06 Kimberly-Clark Worldwide, Inc. Creped and/or apertured webs and process for producing the same

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Also Published As

Publication number Publication date
WO1997009952A1 (fr) 1997-03-20
FR2738845B1 (fr) 1999-06-18
AU6934596A (en) 1997-04-01
FR2738845A1 (fr) 1997-03-21
JP2001503336A (ja) 2001-03-13
US6204210B1 (en) 2001-03-20

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