SE510799C2 - Absorbent multilayer material and method and apparatus for making such - Google Patents

Absorbent multilayer material and method and apparatus for making such

Info

Publication number
SE510799C2
SE510799C2 SE9701869A SE9701869A SE510799C2 SE 510799 C2 SE510799 C2 SE 510799C2 SE 9701869 A SE9701869 A SE 9701869A SE 9701869 A SE9701869 A SE 9701869A SE 510799 C2 SE510799 C2 SE 510799C2
Authority
SE
Sweden
Prior art keywords
layer
absorbent
hydrophobic
weldable
depressions
Prior art date
Application number
SE9701869A
Other languages
Swedish (sv)
Other versions
SE9701869L (en
SE9701869D0 (en
Inventor
Ulf Johannison
Original Assignee
Moelnlycke 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 Moelnlycke Health Care Ab filed Critical Moelnlycke Health Care Ab
Priority to SE9701869A priority Critical patent/SE510799C2/en
Publication of SE9701869D0 publication Critical patent/SE9701869D0/en
Priority to PCT/SE1998/000898 priority patent/WO1998052505A1/en
Publication of SE9701869L publication Critical patent/SE9701869L/en
Publication of SE510799C2 publication Critical patent/SE510799C2/en

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
    • 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
    • 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

Landscapes

  • 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

The present invention relates to an absorbent multilayer material (9) that includes a perforated layer (4') of hydrophobic material and at least one layer (5') of absorbent material. According to the invention, mutually sequential rows of depressions (13) are disposed over that side of the multilayer material (9) which includes the hydrophobic layer (4'), wherein the depressions have the form of hammock-like parts of the hydrophobic layer that penetrate down into the layer of absorbent material (5') so as to form openings (14) perpendicular to the plane of the hydrophobic layer, wherein the hammock-like parts are fastened to the absorbent layer over the major part of their respective surfaces, and the absorbent layer is compressed within the region of each depression. The invention also relates to a method and to an arrangement for producing such material.

Description

lO 15 20 25 30 LJ U'| 51Û 799 2 det absorberande skiktet, samt att det absorberande skiktet är komprimerat inom området för varje nedsänkning. Genom att öppningarna hos flerskiktsmaterial är vinkelräta mot huden när alstren, i vilka flerskiktsmaterialet ingår, är satta på plats är risken liten för att i öppningarna be- làgna fiberândar eller liknande i det absorberande skiktet kommer i kontakt med sárytan eller huden och de kompri- merade delarna av det absorberande skiktet hjälper till att snabbt föra vätska bort från öppningarna. lO 15 20 25 30 LJ U '| 51Û 799 2 the absorbent layer, and that the absorbent layer is compressed within the area of each immersion. Because the openings of multilayer material are perpendicular to the skin when the articles, in which the multilayer material is included, are put in place, there is little risk that fiber ends or the like located in the openings in the absorbent layer come into contact with the wound surface or the skin and the compressed the parts of the absorbent layer help to quickly carry liquid away from the openings.

I en föredragen utföringsform utgöres det hydrofoba skiktet av en plastfilm och det absorberande skiktet av ett non- woven innefattande absorberande fibrer.In a preferred embodiment, the hydrophobic layer consists of a plastic film and the absorbent layer of a nonwoven comprising absorbent fibers.

I en variant innefattar det absorberande flerskiktsmateria- let flera skikt av nonwoven, av vilka åtminstone de skikt som ej anligger mot det hydrofoba skiktet, innefattar smältfibrer.In one variant, the absorbent multilayer material comprises several layers of nonwoven, of which at least the layers which do not abut the hydrophobic layer comprise fused fibers.

I en andra utföringsform utgöres det absorberande skiktet av absorberande skum.In a second embodiment, the absorbent layer is made of absorbent foam.

Uppfinningen avser även ett förfarande för att tillverka ett absorberande flerskiktsmaterial, kännetecknat av att ett skikt av svetsbart hydrofobt material sammanföres med åtminstone ett skikt av absorberande material, att de sam- manförda skikten föres igenom nypet mellan ett ultraljud- horn och en mothàllsvals med skiktet av svetsbart material anliggande mot mothàllsvalsen, samt att valsen utformas med i omkretsled efter varandra följande rader av åtskilda utskott med krökta utsidor och vertikala sidor, vilka rader väsentligen sträcker sig i axiell riktning, samt att av- ståndet mellan ultraljudhornet och mothállsvalsen inställes så att det svetsbara materialet snittas utefter de krökta kanterna mellan varje utskotts utsida och vertikala sidor samtidigt som de sammanförda skikten deformeras inom om- rådet för varje utskott så att rader av nedsänkningar bildas och så att det svetsbara skiktet fästes till skiktet av absorberande material inom större delen av området för 10 20 25 30 '55 3 510 799 varje utskott.The invention also relates to a method for manufacturing an absorbent multilayer material, characterized in that a layer of weldable hydrophobic material is combined with at least one layer of absorbent material, that the joined layers are passed through the nip between an ultrasonic horn and an abutment roller with the layer of weldable material abutting the abutment roller, and that the roller is formed with circumferentially successive rows of spaced apart projections with curved outsides and vertical sides, which rows extend substantially in the axial direction, and that the distance between the ultrasonic horn and the abutment roller is adjusted so that the weldable the material is cut along the curved edges between the outside and vertical sides of each projection while the joined layers are deformed within the area of each projection to form rows of depressions and so that the weldable layer is attached to the layer of absorbent material over most of the area of 10 20 25 30 '55 3,510,799 to each committee.

I en föredragen utföringsform sammanföres flera skikt in- nefattande absorberande fibrer med skiktet av svetsbart material, av vilka åtminstone de skikt, som inte anligger mot skiktet av svetsbart material, även innehåller smält- fibrer.In a preferred embodiment, several layers comprising absorbent fibers are joined to the layer of weldable material, of which at least the layers which do not abut against the layer of weldable material also contain molten fibers.

Uppfinningen avser även en anordning för att tillverka ett absorberande flerskiktsmaterial med en perforerad sida, kännetecknad av att den innefattar organ för att sammanföra åtminstone tvà materialbanor, organ för att föra de samman- förda materialbanorna igenom nypet mellan ett ultraljudhorn och en mothállsvals, vilken innefattar i omkretsled efter varandra följande rader av åtskilda utskott med krökta utsidor och vertikala sidor, vilka rader väsentligen sträc- ker sig i axiell riktning, samt organ för att utskära enskilda materialstycken ur materialbanan efter passagen av ultraljudhornet.The invention also relates to a device for manufacturing an absorbent multilayer material with a perforated side, characterized in that it comprises means for joining at least two webs of material, means for passing the joined webs of material through the nip between an ultrasonic horn and an abutment roller, which comprises in circumferential successive rows of separated projections with curved outer sides and vertical sides, which rows extend substantially in the axial direction, and means for cutting individual pieces of material out of the web of material after the passage of the ultrasonic horn.

I en föredragen utföringsform har utskottens vertikala sidor cirkelsegmentform.In a preferred embodiment, the vertical sides of the committees have a circular segment shape.

Uppfinningen skall nu beskrivas med hänvisning till bifoga- de figurer, av vilka; fig. 1 schematiskt visar en anordning för att tillverka sàrdynor enligt en föredragen utföringsform av uppfinnin- gen , fig. 2 visar en detalj av en mothàllsvals ingående i den i figur 1 visade anordningen, fig. 3 schematiskt visar en sàrdyna tillverkad medelst den i figur 1 visade anordningen, fig. 4 visar en snittvy längs linjen IV-IV i figur 3, och fig. 5 visar en snittvy längs linjen V-V i figur 3. 10 15 20 25 30 (ß) UI 510 799 4 I figur 1 visas schematiskt en anordning enligt uppfin- ningen för att tillverka sàrdynor. Anordningen innefattar en mothållsvals 1 och ett ultraljudhorn 2 i ett ultraljud- svetsaggregat av konventionell typ, vilket är placerat periferiellt ovanför mothàllsvalsen och är radiellt för- flyttbart för att medge inställning av medelavstándet mellan valsperiferin och hornet 2. Vidare har anordningen icke visade organ för att dra en materialbana 3 igenom nypet mellan valsen 1 och hornet 2. Materialbanan 3 är i sig sammansatt av två materialbanor, en bana 4 av plastfilm och en bana 5 av absorberande material, vilka drages av förràdsrullar 6 resp. 7. Plastfilmen 4 kan utgöras av polyeten och banan 5 av ett fibertyg, ett s.k. nonwoven, innehållande absorberande fibrer, såsom viskos- eller cellulosafibrer. Ett lämpligt material är ett spunlaced polypropylen-viskos nonwoven.The invention will now be described with reference to the accompanying figures, of which; Fig. 1 schematically shows a device for manufacturing wound pads according to a preferred embodiment of the invention, Fig. 2 shows a detail of a resistance roller included in the device shown in Fig. 1, Fig. 3 schematically shows a wound pad made by means of the one shown in fig. 1, Fig. 4 shows a sectional view along the line IV-IV in Fig. 3, and Fig. 5 shows a sectional view along the line VV in Fig. 3. (ß) UI 510 799 4 In Fig. 1 is shown schematically a device according to the invention for manufacturing wound pads. The device comprises an abutment roller 1 and an ultrasonic horn 2 in an ultrasonic welding assembly of conventional type, which is located peripherally above the abutment roller and is radially movable to allow adjustment of the average distance between the roller periphery and the horn 2. Furthermore, the device has means not shown for pull a web of material 3 through the nip between the roller 1 and the horn 2. The web of material 3 is itself composed of two webs of material, a web 4 of plastic film and a web 5 of absorbent material, which are drawn by supply rollers 6 and 6, respectively. 7. The plastic film 4 can be made of polyethylene and the web 5 of a non-woven fabric, a so-called nonwoven, containing absorbent fibers, such as viscose or cellulosic fibers. A suitable material is a spunlaced polypropylene viscose nonwoven.

De bägge materialbanorna 4 och 5 fästes till varandra vid passagen av ultraljudhornet 2 och därefter föres den av banorna 4 och 5 sammansatta materialbanan 3 till en klipp- anordning 8, vilken skär eller stansar ut enskilda sàrdynor 9 ur materialbanan 3.The two material webs 4 and 5 are attached to each other at the passage of the ultrasonic horn 2 and then the material web 3 composed of the webs 4 and 5 is conveyed to a cutting device 8, which cuts or punches individual wound pads 9 out of the material web 3.

I figur 2 visas en utskuren del av mothàllsvalsen 1 i större skala. Som framgår av denna figur är valsen 1 utef- ter sin periferi försedd med rader av utskott 10 med krökta utsidor 11 och vertikala sidor 12. Med "utsidor" avses de periferiellt yttre sidorna 11 hos utskotten 10 och med "vertikala sidor" avses att de motstående cirkelsegment- formade sidorna 12 hos varje utskott ligger i plan paral- lella med papperets plan i figur 1.Figure 2 shows a cut-out part of the resistance roller 1 on a larger scale. As can be seen from this figure, the roller 1 is provided along its periphery with rows of projections 10 with curved outer sides 11 and vertical sides 12. By "outer sides" is meant the peripherally outer sides 11 of the projections 10 and by "vertical sides" is meant that they opposite circular segment-shaped sides 12 of each protrusion lie in planes parallel to the plane of the paper in Figure 1.

När de på varandra lagda banorna 4 och 5 passerar ultra- ljudhornet 2 kommer detta under sina upp- och nedåtgående rörelser att trycka banorna 4,5 mot valsperiferin. Därvid har det visat sig att plastfilmen, vilken ligger närmast valsen 1, snittas av utskotten motstàende kanter och de utanför dessa kanter liggande delarna av banorna tryckes sedan ned mellan utskotten. Samtidigt àstadkommes en smält- lO 15 20 25 35 5 510 799 ning av plastskiktets mot skiktet 5 vända sida över större delen av utskottens 10 utsidor 12. Vidare sker en komprime- ring av nonwovenmaterialet 5 i de delar, som ligger mellan utskottens utsidor och ultraljudhornet. Denna komprimering kvarstår när enskilda sárdynor utskäres ur den sammansatta materialbanan 3. Det har visat sig att en mothállsvals innefattande utskott med krökta utsidor ger en större fästyta mellan plastfilmens av utskotten nedtryckta delar och underliggande absorberande material än en mothàllsvals med utskott med rak utsida.When the superimposed paths 4 and 5 pass the ultrasonic horn 2, this will during its upward and downward movements push the paths 4,5 towards the roll periphery. It has been found that the plastic film, which is closest to the roller 1, is cut by the edges opposite the projections and the parts of the webs lying outside these edges are then pressed down between the projections. At the same time a melting is achieved of the side of the plastic layer facing the layer 5 over most of the outer sides 10 of the projections 10. Furthermore, the nonwoven material 5 is compressed in the parts which lie between the outer sides of the projections and the ultrasonic horn. . This compression persists when individual wound pads are cut from the composite web 3. It has been found that an abutment roller comprising protrusions with curved outsides provides a larger attachment surface between the parts of the plastic film depressed by the protrusions and underlying absorbent material than an abutment roller with protrusions with a straight exterior.

En genom beskrivna förfarande tillverkad sàrdyna 9 visas i figurerna 3-5. I dessa figurer visas sàrdynan med den sida, som vid användning skall anliggande mot ett sår, vänd uppát. Sàrdynan är uppbyggd av ett plastfilmskikt 4' och ett nonwovenskikt 5' och innefattar parallella rader av nedsänkningar 13 i plastskiktet och det underliggande non- wovenskiktet. I nedsänkningarna 13 har plastskiktet en hängmatteliknande konfiguration, såsom bäst framgår av figur 5, och mot sàrdynans plan vinkelräta öppningar 14 bildas av de från varandra avlägsnade snittytorna hos plastskiktet. Vidare är nonwovenmaterialet komprimerat inom omrâdet för varje nedsänkning, såsom framgår av figurerna 4 och 5. Skikten 4'och 5' är dessutom fastsvetsade till varandra inom större delen av området för varje nedsänk- ning.A wound pad 9 made by the method described is shown in Figures 3-5. In these figures the wound pad is shown with the side, which in use is to abut against a wound, facing upwards. The wound pad is made up of a plastic film layer 4 'and a nonwoven layer 5' and comprises parallel rows of depressions 13 in the plastic layer and the underlying nonwoven layer. In the depressions 13, the plastic layer has a hammock-like configuration, as best seen in Figure 5, and openings 14 perpendicular to the plane of the wound pad are formed by the spaced-apart cut surfaces of the plastic layer. Furthermore, the nonwoven material is compressed within the area of each immersion, as shown in Figures 4 and 5. The layers 4 'and 5' are also welded to each other within most of the area of each immersion.

Vätska som absorberas i det absorberande materialet kring öppningarna 14 kommer snabbt att transporteras bort däri- från p.g.a. de mindre kapillärerna i det absorberande skiktets 5' komprimerade delar. Förutom att vätsketrans- porten i sàrdynan 9 är gynnsam minskas dessutom risken för att öppningarna 14 skall täppas till av stelnad sàrvätska jämfört med en sàrdyna utan komprimerade delar.Liquid absorbed in the absorbent material around the openings 14 will be rapidly transported away therefrom due to the smaller capillaries in the compressed portions 5 'of the absorbent layer. In addition to the fact that the liquid transport in the wound pad 9 is favorable, the risk of the openings 14 being clogged by solidified wound fluid is also reduced compared with a wound pad without compressed parts.

Sårdynan kan med fördel vara försedd med en baksida av hydrofobt nonwoven, t.ex. av polypropylen.The wound pad may advantageously be provided with a backing of hydrophobically nonwoven, e.g. of polypropylene.

Sårdynan 9 är steriliserbar genom beta-, äng- eller gasste- lO 15 20 25 510 799 6' rilisering.The wound pad 9 can be sterilized by beta-, meadow or gas sterilization.

Det beskrivna förfarandet kan med fördel även användas för att tillverka vätskegenomsläppliga ytskikt till absorberan- de artiklar, såsom dambindor eller blöjor. Vid sådana ytskikt är det viktigt att avgiven vätska snabbt borttrans- porteras från huden för att bindan eller blöjan skall ge ett torrt intryck och för att minska risken för att avgiven vätska rinner utefter plastfilmens yta.The described method can advantageously also be used for manufacturing liquid-permeable surface layers for absorbent articles, such as sanitary napkins or diapers. In such surface layers, it is important that the dispensed liquid is quickly transported away from the skin in order for the napkin or diaper to give a dry impression and to reduce the risk of the dispensed liquid flowing along the surface of the plastic film.

Den beskrivna utföringsformen kan naturligtvis modifieras utan att uppfinningens ram lämnas. Exempelvis kan fler än ett skikt av absorberande material ingå i sårdynan, varvid dock de ytterligare skikten måste innehålla smältfibrer, t.ex. polypropen- eller polyesterfibrer. Andra absorberande material än nonwoven kan användas, t.ex. absorberande skum.The described embodiment can of course be modified without leaving the scope of the invention. For example, more than one layer of absorbent material may be included in the wound pad, however, the additional layers must contain molten fibers, e.g. polypropylene or polyester fibers. Absorbent materials other than nonwoven can be used, e.g. absorbent foam.

Vidare löper raderna av utskott lämpligen något snett relativt mothållsvalsens axialriktning. Angivelsen i pa- tentkravet 5 att raderna av utskott "väsentligen sträcker sig i axielll riktning" avses innefatta rader som bildar en vinkel på upp till 45° mot axialriktningen. Utskotten kan ha annan krökt form än den som visas på figurerna. Uppfin- ningen skall därför endast begränsas av innehållet i bifo- gade patentkrav.Furthermore, the rows of projections preferably run somewhat obliquely relative to the axial direction of the abutment roller. The statement in claim 5 that the rows of projections "substantially extend in the axial direction" are intended to include rows which form an angle of up to 45 ° to the axial direction. The projections may have a curved shape other than that shown in the figures. The invention should therefore be limited only by the content of the appended claims.

Claims (9)

UI 70 75 30 35 510 799 I\l PatentkravUI 70 75 30 35 510 799 I \ l Patent claim 1. Absorberande flerskiktsmaterial (9) innefattande ett per- forerat skikt (4') av hydrofobt material och åtminstone ett skikt (5') av absorberande material, k ä n n e t e c k n a t av att efter varandra följande rader av nedsänkningar (13) är anordnade över den sida hos flerskiktsmaterialet (9) som in- nefattar det hydrofoba skiktet formen av hängmatteliknande delar av det hydrofoba skiktet, (4'), vilka nedsänkningar har vilka tränger ned i skiktet av absorberande material (5') så att öppningar (14), vilka är vinkelräta mot planet för det hydrofoba skiktet, bildas och vilka hängmatteliknande delar över större delen av sin yta är fästa till det absorberande skiktet, inom omrâdet för varje nedsänkning. samt att det absorberande skiktet är komprimeratAbsorbent multilayer material (9) comprising a perforated layer (4 ') of hydrophobic material and at least one layer (5') of absorbent material, characterized in that successive rows of depressions (13) are arranged over the side of the multilayer material (9) comprising the hydrophobic layer in the form of hammock-like parts of the hydrophobic layer, (4 '), which have depressions which penetrate into the layer of absorbent material (5') so that openings (14) which are perpendicular to the plane of the hydrophobic layer, are formed and which hammock-like parts over most of their surface are attached to the absorbent layer, within the range of each immersion. and that the absorbent layer is compressed 2. Absorberande flerskiktsmaterial enligt krav l, k à n - n e t e c k n a t av att det hydrofoba skiktet (4”) utgöres av en plastfilm och det absorberande skiktet (5') av ett non- woven innefattande absorberande fibrer.Absorbent multilayer material according to claim 1, characterized in that the hydrophobic layer (4 ') consists of a plastic film and the absorbent layer (5') of a nonwoven comprising absorbent fibers. 3. Absorberande flerskiktsmaterial enligt krav 2 eller 3, k ä n n e t e c k n a t av att den innefattar flera skikt av nonwoven, av vilka åtminstone de skikt som ej anligger mot det hydrofoba skiktet, innefattar smältfibrer.Absorbent multilayer material according to claim 2 or 3, characterized in that it comprises several layers of nonwoven, of which at least the layers which do not abut against the hydrophobic layer comprise melt fibers. 4. Absorberande flerskiktsmaterial enligt krav l, k ä n - n e t e c k n a t av att det absorberande skiktet utgöres av absorberande skum.Absorbent multilayer material according to claim 1, characterized in that the absorbent layer consists of absorbent foam. 5. Förfarande för att tillverka ett flerskiktsmaterial inne- fattande ett perforerat skikt av svetsbart, hydrofobt mate- rial och åtminstone ett skikt av absorberande material, varvid materialet har efter varandra följande rader av ned- sänkningar anordnade över den sida hos flerskiktsmaterialet som innefattar det hydrofoba skiktet, vilka nedsànkningar har formen av hängmatteliknande delar av det hydrofoba skiktet, p ;\:|1n:|1\:nv1 .mmkn -Umk Joe. 1998-05-28 70 25 30 3 5 510 799 (00 vilka tränger ned i skiktet av absorberande material så att öppningar, skiktet, vilka är vinkelräta mot planet för det hydrofoba bildas och vilka hängmatteliknande delar över större delen av sin yta är fästa till det absorberande skiktet, varjàmte det absorberande skiktet är komprimerat inom området för varje nedsänkning, skikt (4) åtminstone ett skikt (5) k ä n n e t e c k n a t av att ett av hydrofobt, svetsbart material sammanföres med av absorberande material, att de sammanförda skikten föres igenom nypet mellan ett ultraljud- horn (2) material (4) och en mothållsvals (l) med skiktet av svetsbart anliggande mot mothållsvalsen, samt att valsen utformas med i omkretsled efter varandra följande rader av åtskilda utskott (10) (ll) (12), vilka rader väsentligen sträcker sig i axiell med krökta utsidor och vertikala sidor riktning, samt att avståndet mellan ultraljudhornet och mot- hállsvalsen inställes sä att det svetsbara materialet snittas (ll) samtidigt som de sammanförda skikten utefter de krökta kanterna mellan varje utskotts utsida (l2) deformeras inom området för varje utskott så att rader och vertikala sidor (4,5) av nedsänkningar bildas och så att det svetsbara skiktet (4) fästes till skiktet (5) av absorberande material inom större delen av området för varje utskott (10).A method of making a multilayer material comprising a perforated layer of weldable hydrophobic material and at least one layer of absorbent material, the material having successive rows of depressions disposed over the side of the multilayer material comprising the hydrophobic material. layer, which depressions are in the form of hammock-like parts of the hydrophobic layer, p; \: | 1n: | 1 \: nv1 .mmkn -Umk Joe. 1998-05-28 70 25 30 3 5 510 799 (00 which penetrate into the layer of absorbent material so that openings, the layer, which are perpendicular to the plane of the hydrophobic are formed and which hammock-like parts over most of their surface are attached to the absorbent layer, wherein the absorbent layer is compressed in the area of each immersion, layer (4) at least one layer (5) characterized in that a of hydrophobic, weldable material is joined with of absorbent material, that the joined layers are passed through the nip between an ultrasonic horn (2) material (4) and an abutment roller (1) with the layer of weldable abutment against the abutment roller, and that the roller is formed with circumferentially successive rows of separated projections (10) (11) (12), which rows extend substantially in axial with curved outer sides and vertical sides direction, and that the distance between the ultrasonic horn and the resistance roller is adjusted so that the weldable material is cut (II) and as the joined layers along the curved edges between the outside (l2) of each projection are deformed within the area of each projection so that rows and vertical sides (4,5) of depressions are formed and so that the weldable layer (4) is attached to the layer (5). ) of absorbent material within most of the area of each committee (10). 6. Förfarande enligt krav 5, k ä n n e t e c k n a t av att flera skikt innefattande absorberande fibrer sammanföres med skiktet av svetsbart material. av vilka åtminstone de skikt, som inte anligger mot skiktet av svetsbart material, även innehåller smältfibrer.6. A method according to claim 5, characterized in that several layers comprising absorbent fibers are joined to the layer of weldable material. of which at least those layers which do not abut against the layer of weldable material also contain fusible fibers. 7. Anordning för att tillverka ett flerskiktsmaterial inne- fattande ett perforerat skikt av svetsbart, hydrofobt mate- rial och åtminstone ett skikt av absorberande material, varvid materialet har efter varandra följande rader av ned- sänkningar anordnade över den sida hos flerskiktsmaterialet som innefattar det hydrofoba skiktet, vilka nedsänkningar har formen av hängmatteliknande delar av det hydrofoba skiktet, vilka tränger ned i skiktet av absorberande material så att p -__*.':n.~n\.un ¿1n\.\kn4()|1k.dnc. (993-(15-28 10 20 2310799 |\3 öppningar, vilka är vinkelràta mot planet för det hydrofoba skiktet, bildas och vilka hängmatteliknande delar över större delen av sin yta är fästa till det absorberande skiktet, varjämte det absorberande skiktet är komprimerat inom området för varje nedsänkning, k ä n n e t e c k n a d av att anordningen innefattar organ för att sammanföra átminstone tvà materialbanor (4,5), organ för att föra de sammanförda materialbanorna igenom nypet mellan ett ultraljudhorn (2) hos ett ultraljudsvetsaggregat och en mothàllsvals (1), vilken innefattar i omkretsled efter varandra följande rader av åtskilda utskott (10) (ll) sidor (12), vilka rader väsentligen sträcker sig i axiell med krökta utsidor och vertikala riktning, samt organ (8) för att utskära enskilda material- stycken ur materialbanan (3) efter passagen av ultraljudhor- net.An apparatus for making a multilayer material comprising a perforated layer of weldable, hydrophobic material and at least one layer of absorbent material, the material having successive rows of depressions arranged over the side of the multilayer material comprising the hydrophobic the layer, which depressions are in the form of hammock-like parts of the hydrophobic layer, which penetrate into the layer of absorbent material so that p -__ *. ': n. ~ n \ .un ¿1n \. \ kn4 () | 1k.dnc . Openings, which are perpendicular to the plane of the hydrophobic layer, are formed and which hammock-like parts over most of their surface are attached to the absorbent layer, and the absorbent layer is compressed within the area of each immersion, characterized in that the device comprises means for joining at least two material webs (4,5), means for passing the joined material webs through the nip between an ultrasonic horn (2) of an ultrasonic welding assembly and a resistance roller (1), which comprises circumferentially successively rows of spaced projections (10) (11) sides (12), which rows extend substantially in axial with curved outsides and vertical direction, and means (8) for cutting individual pieces of material from the web of material. (3) after the passage of the ultrasonic horn. 8. Anordning enligt krav 7, k ä n n e t e c k n a d av att utskottens (10) vertikala sidor (12) har cirkelsegmentform.Device according to claim 7, characterized in that the vertical sides (12) of the projections (10) have the shape of a circular segment. 9. Anordning enligt krav 8, k à n n e t e c k n a d av att utskottens (10) vertikala sidor (12) är halvcirkelformiga. p gcxncnxnn .mwkn JUnL dm: 1998-05-28Device according to claim 8, characterized in that the vertical sides (12) of the projections (10) are semicircular. p gcxncnxnn .mwkn JUnL dm: 1998-05-28
SE9701869A 1997-05-20 1997-05-20 Absorbent multilayer material and method and apparatus for making such SE510799C2 (en)

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JP3498035B2 (en) * 2000-03-07 2004-02-16 ユニ・チャーム株式会社 Multilayer absorbent material for hygiene articles
CA2771801C (en) * 2009-09-30 2017-03-28 Moelnlycke Health Care Ab A method of attaching grip tabs to the carrier layer of a film dressing

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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
EP0489205B1 (en) * 1990-12-04 1996-03-13 Kang Na Hsiung Enterprise Co. Ltd. An absorbent padding material
JP2823402B2 (en) * 1991-12-04 1998-11-11 ユニ・チャーム株式会社 Body fluid absorbent articles

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