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WO1998052505A1 - Materiau multicouche absorbant, procede et dispositif de production de ce materiau - Google Patents

Materiau multicouche absorbant, procede et dispositif de production de ce materiau Download PDF

Info

Publication number
WO1998052505A1
WO1998052505A1 PCT/SE1998/000898 SE9800898W WO9852505A1 WO 1998052505 A1 WO1998052505 A1 WO 1998052505A1 SE 9800898 W SE9800898 W SE 9800898W WO 9852505 A1 WO9852505 A1 WO 9852505A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
absorbent
hydrophobic
rows
layers
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.)
Ceased
Application number
PCT/SE1998/000898
Other languages
English (en)
Inventor
Ulf Johannison
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.)
Molnycke Health Care AB
Original Assignee
Molnycke Health Care 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 Molnycke Health Care AB filed Critical Molnycke Health Care AB
Publication of WO1998052505A1 publication Critical patent/WO1998052505A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • 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
    • A61F13/01—Non-adhesive bandages or dressings
    • A61F13/01021—Non-adhesive bandages or dressings characterised by the structure of the dressing
    • A61F13/01029—Non-adhesive bandages or dressings characterised by the structure of the dressing made of multiple layers
    • 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
    • A61F13/01—Non-adhesive bandages or dressings
    • A61F13/01034—Non-adhesive bandages or dressings characterised by a property
    • 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
    • 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 of the pads
    • 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
    • A61F13/51305—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 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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53704—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having an inhibiting function on liquid propagation
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00217—Wound bandages not adhering to the wound
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00314—Wound bandages with surface treatments
    • A61F2013/00327—Wound bandages with surface treatments to create projections or depressions in surface
    • 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
    • A61F2013/00361—Plasters
    • A61F2013/00544—Plasters form or structure
    • A61F2013/00604—Multilayer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F2013/53765—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry
    • A61F2013/53782—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterized by its geometry with holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0045—Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to an absorbent multilayer material and also to a method and to an arrangement for its manufacture .
  • the dressings are normally constructed of a layer of material that can only adhere lightly to the wound, or sore, and an overlying layer of absorbent material.
  • the layer of the dressing that lies against the wound is often comprised of a perforated plastic film.
  • the surface sheet of absorbent articles, such as sanitary napkins or diapers, will also often include a perforated plastic layer which is intended to lie proximal to the wearer's body in use. In order for such articles to function effectively, it is essential that the dressing and such surface layers are constructed to achieve effective transportation of discharged fluid or liq- uid into the absorbent layer, through the openings in the plastic film.
  • the object of the present invention is to provide an absorbent multilayer material which is composed of one or more absorbent layers, or sheets, fastened to a layer of hydrophobic material that has good fluid or liquid transportation and absorption properties and with which there is little danger of any part of the absorbent layer coming into contact with the wound or with the wearer's skin.
  • an absorbent multilayer material that includes a perforated layer, or sheet, of hydrophobic material and at least one layer, or sheet, of absorbent material.
  • the inventive material is characterised in that mutually sequential rows of depressions are disposed over that side of the material which lies above that side of said material which includes said hydrophobic layer, wherein said depressions have the form of hammock-like parts of the hydrophobic layer that penetrate down into the absorbent layer so as to form openings at right angles to the plane of the hydrophobic layer, and wherein the hammock-like parts are fastened to the absorbent layer over the major part of their surfaces; and in that the absorbent layer is compressed in the region of each depression.
  • the openings in the multilayer material are perpendicular when the articles in which the multilayer materials included are placed in position, there is little danger of fibre ends or the like in the absorbent layer and present in said openings coming into contact with the surface of the wound or with the skin, while the compressed parts of the absorbent layer assist in transporting fluid quickly away from the openings.
  • the hydrophobic layer or sheet is comprised of plastic film and the absorbent layer, or sheet, is comprised of nonwoven material that includes absorbent fibres .
  • the absorbent multilayer material includes several layers of nonwoven material, of which at least those layers that are not in contact with the hydrophobic layer include melt fibres.
  • the absorbent layer is comprised of absorbent foam.
  • the invention also relates to a method of producing an ab ⁇ sorbent multilayer material. The method is characterised by the steps of combining a layer of weldable hydrophobic material with at least one layer of absorbent material; passing the combined layers through the nip defined between an ultra- sound horn and an anvil roll with the layer of weldable mate- rial in abutment with the anvil roller, said roller having disposed in mutually sequential rows about its circumference discrete projections that have curved outwardly facing surfaces and vertical side surfaces and said rows extending essentially in an axial direction; and setting the distance between the ultrasound horn and the anvil roller so that the weldable material will be cut along the curved edges located between the outside and the vertical sides of each projection whilst simultaneously deforming the combined layers in the region of each projection so as to form rows of depressions and so as to fasten the weldable layer to the layer of absorbent material within the major part of the region of each pro
  • several layers that include absorbent fibres are combined with the layer of weldable material, wherein at least those layers that do not lie against the layer of weldable material also include melt fibres .
  • the invention also relates to arrangement for producing an absorbent multilayer material that has a perforated side.
  • the arrangement is characterised by means for combining at least two webs of material, means for passing the combined webs through the nip defined between an ultrasound horn and an anvil roll that includes around its circumference mutually sequential rows of discrete projections that have curved outwardly facing surfaces and vertical side surfaces, said rows extending essentially in an axial direction, and means for cutting individual pieces of material from said combined web subsequent to its passage past the ultrasound horn.
  • the vertical sides of said projections have a segmental shape.
  • Fig. 1 is a schematic illustration of an arrangement for producing wound dressings, or pads, in accordance with one preferred embodiment of the invention
  • Fig. 2 illustrates part of an anvil roll included in the arrangement shown in Fig. 1;
  • FIG. 3 is a schematic illustration of a wound dressing or pad manufactured by means of the arrangement shown in Fig. 1;
  • Fig. 4 is a sectioned view taken on the line IV-IV in Fig. 3;
  • Fig. 5 is a sectioned view taken on the line V-V in Fig. 3.
  • Fig. 1 illustrates schematically an inventive arrangement for manufacturing wound dressings or pads.
  • the arrangement includes an anvil roll 1 and an ultrasound horn 2 included in a typical ultrasound welding unit positioned above the periphery of the anvil roll and movable in a radial direction so as to enable a mean distance to be set between the periphery of the anvil roll and said horn 2.
  • the arrangement also includes means for drawing a web of material 3 through the nip defined between the roll 1 and the horn 2.
  • the web 3 is comprised of two webs of material, i.e. a web 4 of plastic film and a web 5 of absorbent material, said webs being taken from respective storage reels 6 and 7.
  • the plastic film 4 may consist of polyethylene and the web 5 may consist of nonwoven material that includes absorbent fibres, such as viscose or cellulose fibres.
  • An appropriate material in this regard is a spun laced polypropylene-viscose nonwoven material.
  • Fig. 2 shows part of the anvil roll 1 in larger scale.
  • the periphery of the roll 1 includes rows of projections 10 that have curved outwardly facing surfaces 11 and vertical sides 12.
  • outwardly facing surfaces is meant the outer peripheral sides 11 of the projections 10, and by “vertical sides” is meant that the mutually opposing circle-segment shaped sides 12 of each projection are plane parallel with the plane of the paper in Fig. 1.
  • the horn will press the webs 4, 5 against the periphery of the anvil roll as the horn moves up and down. It has been found that the plastic film that lies closest to the anvil roll 1 is cut by the opposing edges of the projections and that those web parts that lie outside these edges are then pressed down between said projections. At the same time, the side of the plastic layer that faces towards the web 5 will melt over the major part of the sides 12 of the projections 10. This re ⁇ sults in compression of the nonwoven material 5 in those parts of the material that lie between the outer sides of the projections and the horn. This compression remains when the individual dressings or pads are cut from the combined web 3.
  • FIGs. 3-5 illustrate a wound pad or dressing produced in accordance with the described method.
  • the Figures show the dressing with that side of the dressing that lies against a wound when the pad is applied facing upwards.
  • the dressing is comprised of a layer 4' of plastic film and a nonwoven layer 5' and includes mutually parallel rows of depressions 13 in the plastic layer and the underlying nonwoven layer.
  • the depressions 13 have a hammock-like configuration in the plas- tic layer, as will best be seen from Fig.
  • openings 14 perpendicular to the plane of the dressing are formed by the mutually separated cut surfaces of the plastic layer.
  • the nonwoven material is compressed in the region of each depressions, as evident from Figs. 4 and 5.
  • the layers 4' and 5' are also welded together within a greater part of the region of each depression.
  • Fluid, or liquid, absorbed in the absorbent material around the openings 14 will be quickly transported away therefrom, as a result of the smaller capillaries in the compressed parts of the absorbent layer 5'.
  • the dressing may conveniently be provided with a backing sheet of hydrophobic nonwoven material, such as polypropylene, for instance.
  • the wound dressing 9 can be sterilised by beta, steam or gas sterilising processes.
  • the described method can be used advantageously for the manu- facture of liquid-permeable outer sheets for absorbent arti- cles such as sanitary napkins or diapers.
  • outer sheets it is important that discharged liquid can be transported quickly away from the skin in order for the napkin or diaper to give the impression of being dry and also in order to reduce the risk of discharged liquid flowing along the surface of the plastic film.
  • the wound dressing may include more than one layer of absorbent material, although the outer layers must contain melt fibres, such as polypropylene or polyester fibres. Materials other than nonwoven material can be used, such as absorbent foam material, for instance.
  • the rows of projections may conveniently extend obliquely to the axial direction of the anvil roll.
  • the statement in Claim 5 to the effect that the rows of projections extend "essentially in an axial direction" will be understood to include rows that define an angle of up to 45° with said axial direction.
  • the projections may have a curved shape different to that shown in the Figures. It will there ⁇ fore be understood that the invention is restricted solely by the contents of the following Claims.

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

Abstract

L'invention concerne un matériau multicouche absorbant (9) comprenant une couche perforée (4') en matière hydrophobe et au moins une couche (5') en matière absorbante. Selon l'invention, des rangées de dépressions (13) successives sont placées sur la face du matériau multicouche (9) comprenant la couche hydrophobe (4'). Ces dépressions ont la forme d'éléments de type hamac de la couche hydrophobe, qui pénètrent dans le matériau absorbant (5') de telle manière que des ouvertures (14) soient formées perpendiculairement au plan de la couche hydrophobe. Ces éléments de type hamac sont, sur la majeure partie de leur surface respective, fixés à la couche absorbante qui est comprimée dans la zone de chaque dépression. L'invention concerne également un procédé et un dispositif permettant de produire un tel matériau.
PCT/SE1998/000898 1997-05-20 1998-05-14 Materiau multicouche absorbant, procede et dispositif de production de ce materiau Ceased WO1998052505A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701869A SE510799C2 (sv) 1997-05-20 1997-05-20 Absorberande flerskiktsmaterial samt förfarande och anordning för att tillverka ett sådant
SE9701869-1 1997-05-20

Publications (1)

Publication Number Publication Date
WO1998052505A1 true WO1998052505A1 (fr) 1998-11-26

Family

ID=20407003

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000898 Ceased WO1998052505A1 (fr) 1997-05-20 1998-05-14 Materiau multicouche absorbant, procede et dispositif de production de ce materiau

Country Status (2)

Country Link
SE (1) SE510799C2 (fr)
WO (1) WO1998052505A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132071A3 (fr) * 2000-03-07 2004-08-18 Uni-Charm Corporation Article absorbant avec structures absorbantes multicouches
WO2011040860A1 (fr) * 2009-09-30 2011-04-07 Mölnlycke Health Care Ab Procédé de fixation de languettes de saisie d'une couche de support de pansement film

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934588A (en) * 1974-08-20 1976-01-27 Johnson & Johnson Disposable diaper having facing layer with patterned preferential flow areas
US3939033A (en) * 1974-12-16 1976-02-17 Branson Ultrasonics Corporation Ultrasonic welding and cutting apparatus
US4430148A (en) * 1982-04-27 1984-02-07 The Procter & Gamble Company Ultrasonic bonding apparatus
US4846813A (en) * 1985-09-25 1989-07-11 Kimberly-Clark Corporation Self-sealing fluid absorbent article
EP0489205A1 (fr) * 1990-12-04 1992-06-10 Kang Na Hsiung Enterprise Co. Ltd. Matériau pour un rembourrage absorbant
EP0545423A1 (fr) * 1991-12-04 1993-06-09 Uni-Charm Corporation Article absorbant pour fluides corporels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934588A (en) * 1974-08-20 1976-01-27 Johnson & Johnson Disposable diaper having facing layer with patterned preferential flow areas
US3939033A (en) * 1974-12-16 1976-02-17 Branson Ultrasonics Corporation Ultrasonic welding and cutting apparatus
US4430148A (en) * 1982-04-27 1984-02-07 The Procter & Gamble Company Ultrasonic bonding apparatus
US4846813A (en) * 1985-09-25 1989-07-11 Kimberly-Clark Corporation Self-sealing fluid absorbent article
EP0489205A1 (fr) * 1990-12-04 1992-06-10 Kang Na Hsiung Enterprise Co. Ltd. Matériau pour un rembourrage absorbant
EP0545423A1 (fr) * 1991-12-04 1993-06-09 Uni-Charm Corporation Article absorbant pour fluides corporels

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132071A3 (fr) * 2000-03-07 2004-08-18 Uni-Charm Corporation Article absorbant avec structures absorbantes multicouches
AU779234B2 (en) * 2000-03-07 2005-01-13 Uni-Charm Corporation Sanitary article having multi-layered absorbent member
KR100740517B1 (ko) * 2000-03-07 2007-07-20 유니챰 가부시키가이샤 위생물품용 다층 구조 흡수 부재
WO2011040860A1 (fr) * 2009-09-30 2011-04-07 Mölnlycke Health Care Ab Procédé de fixation de languettes de saisie d'une couche de support de pansement film
US9486366B2 (en) 2009-09-30 2016-11-08 Mölnlycke Health Care Ab Method of attaching grip tabs to the carrier layer of a film dressing

Also Published As

Publication number Publication date
SE510799C2 (sv) 1999-06-21
SE9701869L (sv) 1998-11-21
SE9701869D0 (sv) 1997-05-20

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