WO1994027650A1 - Procede de fixation d'une membrane - Google Patents

Procede de fixation d'une membrane Download PDF

Info

Publication number
WO1994027650A1
WO1994027650A1 PCT/EP1994/001609 EP9401609W WO9427650A1 WO 1994027650 A1 WO1994027650 A1 WO 1994027650A1 EP 9401609 W EP9401609 W EP 9401609W WO 9427650 A1 WO9427650 A1 WO 9427650A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
wound dressing
water
layer
fixing
Prior art date
Application number
PCT/EP1994/001609
Other languages
German (de)
English (en)
Inventor
Karl Rademacher
Original Assignee
Sebapharma Gmbh & Co.
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 Sebapharma Gmbh & Co. filed Critical Sebapharma Gmbh & Co.
Publication of WO1994027650A1 publication Critical patent/WO1994027650A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • 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
    • 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

Definitions

  • the invention relates to a method for fixing a membrane on a water-containing polymeric layer of a wound dressing, a wound dressing or a carrier matrix.
  • DE-A-29 46 553 describes a wound dressing for treating the skin in the event of burns on the basis of gel-like polymers, these being completely or partially coated with a water vapor and gas permeable membrane.
  • the membrane can be a dialysis membrane or a hemofiltration membrane.
  • Polymeric carbohydrates, their derivatives or polyvinylpyrrolidone, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid and their derivatives are used as gel-like polymers.
  • DE-C-40 29 337 describes a process for producing a flat absorbent nonwoven body which is absorbent on one side, an endless nonwoven web made of polypropylene staple fibers or staple fibers having an endless tissue web in the gap between a heated smooth and a punctiform embossing , heated calender roll is connected.
  • the tissue web runs around half the circumference of the engraved roller.
  • a wound dressing system in the form of a wound dressing, a wound dressing or a carrier matrix is known which consists of a biocompatible, open-pore plastic foam, in the pores of which a hydrogel is embedded.
  • Such wound dressing systems are generally provided with a self-adhesive membrane on the side facing away from the wound, so as to prevent bacteria and moisture acting from the outside and, on the other hand, allow sufficient ventilation of the wound and escape of gases such as carbon dioxide or water vapor.
  • membranes consist in particular of polyether urethanes, but other membranes with the corresponding properties can also be used, such as for example water-impermeable, but water vapor and gas permeable fabrics such as Gortex ⁇ R ⁇ .
  • this cover layer can be dimensioned larger than the wound dressing made of the open-pore plastic foam with embedded hydrogel, so that the wound dressing can be attached to the skin overall with the aid of this self-adhesive layer.
  • the wound dressing including the covering sheet, in larger pieces and rolls, cut it to the required size of the wound if necessary, and attach it to the body either with a bandage or with a self-adhesive plaster.
  • the layer provided with the membrane is cooled.
  • This cooling can take place, for example, with a cold or cooled stamp. This measure prevents greater water loss, in particular in the case of high-water-containing polymer layers, which is noticeable by shrinkage of the entire wound dressing or the wound dressing.
  • the membrane is generally melted by heating to 150 to 250 ° C., overheating having to be avoided in order to prevent the membrane from melting.
  • the membrane to be applied can be water-permeable or non-water-permeable.
  • a second membrane is bonded onto the first membrane in a conventional manner.
  • the water vapor permeability increases four to five times by heating the membrane.
  • a second membrane must be applied in a conventional manner by gluing. In this way, the desired water vapor permeability can also be achieved with the aid of the method according to the invention.
  • a correspondingly dimensioned heating stamp can be used for melting, for example a heating stamp heated via the electrical resistance Metal block, preferably made of aluminum, with correspondingly protruding points, so that the membrane is heated at individual points and fuses there with the polymeric support.
  • a metal stamp which is provided with webs which form an outstanding lattice, so that the membrane is welded to the wound dressing by applying the metal stamp along these webs.
  • the membranes can be permanently and firmly connected to the polymeric water-containing layer of the wound dressing, the wound dressing or the carrier matrix.
  • the connection is so tight that the membrane can only be pulled off when the polymer layer is torn out.
  • the water content of the wound dressing, the wound dressing or the carrier matrix is 40-60% by weight, preferably 50% by weight.
  • a 25 ⁇ m membrane can be used as the polyether urethane membrane, and this membrane can also be used for the preferred embodiment of attaching a second membrane after the melting process.
  • a sled with a contact surface of 8 x 10 cm moves on rails.
  • the applied membrane is attached at a temperature of 155 ° C. welds.
  • the stamp is placed on the film surface with a slight pressure and left there for approx. 5 seconds.
  • the wound dressing with the membrane now welded is moved under a cooling stamp at a temperature of 4 ° C. and the somewhat elevated temperature of the wound dressing is cooled down. This prevents excessive evaporation of water from the wound dressing.
  • the heatable stamp has a grid on the support surface with excellent webs (1 mm wide). When welding, these webs are pressed onto the membrane. The membrane melts at these points and connects to the likewise melted surface of the wound dressing. Since the weld seams produced in this way lead to an increase in the water vapor permeability of the membrane, the water vapor permeability of the membrane can also be influenced by the choice of the weld seams (narrow-meshed or wide-meshed). This results in a higher water vapor permeability in the case of closely arranged weld seams than in the case of wide-meshed arrangements.
  • the wound dressing with a welded-on membrane is sealed airtight and watertight in an aluminum foil coated with plastic.

Landscapes

  • Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention a pour objet un procédé pour la fixation d'une membrane sur une couche polymère aqueuse d'un bandage, d'un pansement ou d'une matrice de support, caractérisé en ce que la membrane est disposée sur la surface de la couche et qu'ensuite des points de la membrane sont chauffés de telle manière que la membrane fonde avec la couche polymère aqueuse à ces emplacements.
PCT/EP1994/001609 1993-05-26 1994-05-18 Procede de fixation d'une membrane WO1994027650A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4317465.5 1993-05-26
DE4317465A DE4317465C1 (de) 1993-05-26 1993-05-26 Verfahren zur Fixierung einer Membran

Publications (1)

Publication Number Publication Date
WO1994027650A1 true WO1994027650A1 (fr) 1994-12-08

Family

ID=6488925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/001609 WO1994027650A1 (fr) 1993-05-26 1994-05-18 Procede de fixation d'une membrane

Country Status (2)

Country Link
DE (1) DE4317465C1 (fr)
WO (1) WO1994027650A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816817A1 (de) * 1967-12-27 1969-08-28 American Hospital Supply Corp Verfahren zur Herstellung eines gasdurchlaessigen Schichtgewebes
DE2946553A1 (de) * 1979-11-17 1981-05-27 Hoechst Ag, 6000 Frankfurt Abdeckvorrichtung zur behandlung der haut auf basis von gelartigen polymeren
EP0183460A2 (fr) * 1984-11-16 1986-06-04 Trigon Packaging Systems (NZ) Limited Couche à jeter
EP0237990A2 (fr) * 1986-03-14 1987-09-23 McNEIL-PPC, INC. Couche pour serviette hygiénique comportant un film coextrudé perforé
EP0292080A1 (fr) * 1987-05-22 1988-11-23 Avery Dennison Corporation Bande soudable microporeuse non-tissée pour applications médicales
WO1992003172A1 (fr) * 1990-08-17 1992-03-05 Sebapharma Gmbh & Co. Systeme de pansement
DE4029337C1 (en) * 1990-09-15 1992-05-21 Fa. Carl Freudenberg, 6940 Weinheim, De Flat fleece absorbent
DE4038705A1 (de) * 1990-12-05 1992-06-11 Hasso Von Bluecher Schichtmaterial fuer medizinische zwecke

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816817A1 (de) * 1967-12-27 1969-08-28 American Hospital Supply Corp Verfahren zur Herstellung eines gasdurchlaessigen Schichtgewebes
DE2946553A1 (de) * 1979-11-17 1981-05-27 Hoechst Ag, 6000 Frankfurt Abdeckvorrichtung zur behandlung der haut auf basis von gelartigen polymeren
EP0183460A2 (fr) * 1984-11-16 1986-06-04 Trigon Packaging Systems (NZ) Limited Couche à jeter
EP0237990A2 (fr) * 1986-03-14 1987-09-23 McNEIL-PPC, INC. Couche pour serviette hygiénique comportant un film coextrudé perforé
EP0292080A1 (fr) * 1987-05-22 1988-11-23 Avery Dennison Corporation Bande soudable microporeuse non-tissée pour applications médicales
WO1992003172A1 (fr) * 1990-08-17 1992-03-05 Sebapharma Gmbh & Co. Systeme de pansement
DE4029337C1 (en) * 1990-09-15 1992-05-21 Fa. Carl Freudenberg, 6940 Weinheim, De Flat fleece absorbent
DE4038705A1 (de) * 1990-12-05 1992-06-11 Hasso Von Bluecher Schichtmaterial fuer medizinische zwecke

Also Published As

Publication number Publication date
DE4317465C1 (de) 1994-07-28

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