ADHESIVE LAMINATES AND APPLICATIONS THEREOF

• US 20100159192A1
• Filed: 04/03/2007
• Published: 06/24/2010
• Est. Priority Date: 04/03/2006
• Status: Active Grant

• Current Assignee: Brightwake Limited
• Original Assignee: Brightwake Limited
• Inventors: Cotton, Stephen
• Granted Patent: US 10,086,107 B2
• Time in Patent Office: Days
• US Class Current: 428/137
• CPC Class Codes: A61F 13/0213 the fluid retention member being a layer of hydrocolloid, gel forming material
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• CPC Class Codes: A61F 13/0226 characterised by the support layer
• CPC Class Codes: A61F 13/0253 characterized by the adhesive material
• CPC Class Codes: A61F 13/0259 characterised by the release liner covering the skin adhering layer
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: A61L 15/58 Adhesives
• CPC Class Codes: C09J 2301/162 the carrier being a laminate constituted by plastic layers only
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2475/006 in the substrate
• CPC Class Codes: C09J 2483/006 in the substrate
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/273 of coating
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

A releasably adhesive laminate (1) comprises a structural layer (2) carrying on at least part of one side thereof a hydrophobic gel (4) and on at least part of the other side thereof a pressure-sensitive adhesive (3). The structural layer (2) is preferably a film of synthetic plastics material, eg polyurethane. The pressure-sensitive adhesive (3) is preferably an acrylic adhesive, and the hydrophobic gel (4) is preferably a silicone gel. The laminate (1) may be used as a skin contact component of a wound dressing or in numerous other applications.

Claims

1. A releasably adhesive laminate comprising a structural layer carrying on at least part of one side thereof a hydrophobic gel and carrying on at least part of the other side thereof a pressure-sensitive adhesive.

2. A laminate as claimed in claim 1, wherein the hydrophobic gel is a silicone gel.

3. A laminate as claimed in claim 1, wherein the pressure-sensitive adhesive is an acrylic adhesive.

4. A laminate as claimed in claim 1, wherein the structural layer is a film of a synthetic plastics material.

5. A laminate as claimed in claim 4, wherein the structural layer is a film of polyurethane.

6. A laminate as claimed in claim 1, wherein the hydrophobic gel is coated onto the structural layer at a coating weight of between 50 g/m² and 800 g/m².

7. A laminate as claimed in claim 1, wherein the thickness of the hydrophobic gel is between 5 μ

m and 10 mm.

8. A laminate as claimed in claim 1, which is apertured or perforated.

9. A laminate as claimed in claim 8, which is formed with a regular array of perforations.

10. A laminate as claimed in Claim 8, which is formed with a regular array of perforations that are circular and have a diameter of from 50 μ

m to 10 mm.

11. A wound dressing comprising a skin contact layer in the form of a laminate as claimed in claim 1.

12. A wound dressing as claimed in claim 11, wherein one or more secondary dressing components are affixed to the laminate via the pressure-sensitive adhesive.

13. A wound dressing as claimed in claim 12, wherein said one or more secondary dressing components include one or more absorbent components.

14. A wound dressing as claimed in claim 13, wherein said one or more secondary dressing components include one or more absorbent components selected from fabric pads, hydrophilic foams, hydrogels, hydrocolloids and alginates.

15. An item intended to be affixed to the skin of a user, to which item is attached, via the pressure-sensitive adhesive, a patch of a laminate as claimed in claim 1.

16. An item as claimed in claim 15, which is an item of clothing.

17. An item as claimed in claim 16, which is an item of underwear.

18. An item as claimed in claim 16, which is a bra.

19. An item as claimed in claim 15, which is an item of sports equipment.

20. An item intended to be affixed to a hard surface, to which item is attached, via the pressure-sensitive adhesive, a patch of a laminate as claimed in claim 1.

21. A method for the manufacture of a laminate as claimed in claim 1, which method comprises:

a) providing a preformed pre-laminate comprising the structural layer and the pressure-sensitive adhesive;

b) applying to the pre-laminate a curable hydrophobic gel precursor composition; and

c) causing or allowing the gel precursor composition to cure, thereby forming a layer of hydrophobic gel.