Elastic bandages

• US 4,414,970 A
• Filed: 07/24/1981
• Issued: 11/15/1983
• Est. Priority Date: 07/30/1980
• Status: Expired due to Term

• Current Assignee: Smith and Nephew Associated Companies PLC (Smith & Nephew PLC)
• Original Assignee: Smith and Nephew Associated Companies PLC (Smith & Nephew PLC)
• Inventors: Berry, Peter W.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US06/286,567
• Time in Patent Office: 844 Days
• Field of Search: 128/155, 128/156, 128/334 R, 128/169
• US Class Current: 602/75
• CPC Class Codes: A61F 13/01038 Flexibility, stretchability or elasticity
• CPC Class Codes: A61F 13/01046 Air-vapor permeability
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 13/08 Elastic stockings; for contracting aneurisms
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 13/537 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer A61F13/538 takes precedence
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/00102 oblong
• CPC Class Codes: A61F 2013/00119 elastic
• CPC Class Codes: A61F 2013/00263 vapour permeability >500 g/m2/24h
• CPC Class Codes: A61F 2013/00744 containing non-woven
• CPC Class Codes: A61F 2013/00876 vapour permeability >500 g/mg/24h
• CPC Class Codes: A61F 2013/15821 characterized by the apparatus for manufacturing
• CPC Class Codes: A61F 2013/51447 being air permeable
• CPC Class Codes: A61F 2013/530131 being made in fibre but being not pulp
• CPC Class Codes: A61F 2013/53445 from several sheets
• CPC Class Codes: A61F 2013/53782 with holes
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: B32B 25/10 : next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/12 : next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B32B 3/266 : characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/022 : Non-woven fabric
• CPC Class Codes: C08L 75/04 : Polyurethanes
• CPC Class Codes: Y10S 602/90 : Method of making bandage structure

Abstract

Moisture vapor transmitting elastic bandages which comprise an inner layer of fabric and an outer layer of fabric bonded to a central layer characterized in that the central layer comprises an elastomeric film are described.

Claims

1. A moisture vapour transmitting elastic bandage which comprises an inner layer of fabric and an outer layer of fabric bonded to a central layer, said central layer comprising an apertured elastomeric film which allows the passage of wound exudate from the inner layer to the outer layer and whereby the bandage has a recoverable elastic strain in the length direction of 25% to 150% at a stress of 180 g/cm.

2. An elastic bandage as claimed in claim 1 in which a fabric layer is in a compressed state in the length direction.

3. An elastic bandage as claimed in claim 1 in which the central layer comprises a polyurethane.

4. An elastic bandage as claimed in claim 1 in which a fabric layer comprises an absorbent non-woven fabric.

5. An elastic bandage as claimed in claim 1 in which a fabric layer comprises an integral thermoplastic net.

6. A method of making an elastic bandage of claim 1 which comprises bonding an inner layer of fabric and an outer layer of fabric to a central layer of apertured elastomeric film in a stretched condition and thereafter allowing the composite to contract.

7. A method of making an elastic bandage of claim 5 which comprises bonding a layer of integral thermoplastic net or net precursor material to an apertured elastomeric film, stretching the laminate in a longitudinal direction and thereafter allowing the laminate to contract.

8. An elastic bandage according to claim 1 in which the apertured film is an integral net.

10. An elastic bandage according to claim 1 in which the apertured elastomeric film has 8 to 24 apertures per cm with a dimension of 0.1 to 1 mm.

11. An elastic bandage according to claim 8 in which the integral net has longitudinal and transverse strands.

12. An elastic bandage according to claim 1 in which the bandage has an initial bandaging stress of 140 g/cm to 230 g/cm.

9. A moisture vapour transmitting elastic bandage which comprises an inner layer of fabric and an outer layer of fabric bonded by an adhesive to a central apertured film layer, said bandage becoming adhesive when stretched in a longitudinal direction by exposure of the adhesive through the apertures.