LOW FRICTION COATINGS FOR ADHESIVE DRESSINGS AND METHOD OF MANUFACTURE THEREOF

Abstract

An adhesive dressing comprising a conformable, elastomeric backing layer comprising a first side and a second side, a pressure-sensitive adhesive disposed on the first side, and a topcoat applied to the second side, wherein the topcoat comprises a friction-reducing surface finish, wherein the coefficient of function of the topcoat is equal to or less than 0.6 as measured by ASTM 1894-95.

Description

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of an exemplary adhesive dressing.

FIG. 2 is a partial and detailed view of an exemplary topcoat.

FIG. 3 is a side view of an exemplary coating line.

FIG. 4 a side view of an exemplary production line.

Claims

1. An adhesive dressing, comprising a conformable, elastomeric backing layer comprising a first side and a second side opposite the first side;a pressure-sensitive adhesive layer disposed on the first side of the backing layer; and,a topcoat having an inner surface and an outer surface, wherein the inner surface is disposed on the second side of the backing layer and wherein the outer surface comprises a friction-reducing surface finish having a coefficient of friction equal to or less than about 0.6 as measured by ASTM 1894-95.

2. The adhesive dressing of claim 1, wherein the friction-reducing surface finish has a coefficient of friction equal to or less than about 0.5 as measured by ASTM 1894-95.

3. The adhesive dressing of claim 1, wherein the friction-reducing surface finish has a coefficient of friction equal to or less than about 0.4 as measured by ASTM 1894-95.

4. The adhesive dressing of claim 1, wherein the friction-reducing surface finish is a matte finish.

5. The adhesive dressing of claim 1, wherein the friction-reducing surface finish has an average surface roughness of approximately equal to or less than about 5.0 as measured by ASME/ANSI B46.1 (1995).

6. The adhesive dressing of claim 1, wherein the backing layer is in the form of a foam.

7. The adhesive dressing of claim 6, wherein the foam comprises a polyurethane or a siloxane polymer.

8. The adhesive dressing of claim 1, wherein the backing layer has a moisture vapor transmission rate equal to or greater than 500 grams water per square meter per 24 hrs as determined by ASTM E96 at 100° F. and 90 relative % humidity.

9. The adhesive dressing of claim 1, wherein the topcoat comprises a (meth)acrylate, silicone, or epoxy polymer.

10. The adhesive dressing of claim 13, wherein the outer surface of the topcoat is textured.

11. The adhesive dressing of claim 1, wherein the second side of the backing layer is textured.

12. The adhesive dressing of claim 1, wherein the second side of the backing layer is textured, and further wherein the topcoat substantially conforms to the textured surface.

13. The adhesive dressing of claim 1, further comprising a treatment layer disposed on a side of the pressure-sensitive adhesive layer opposite the backing layer.

14. The adhesive dressing of claim 13, wherein the treatment layer comprises an absorbent pad.

15. The adhesive dressing of claim 13, wherein the treatment layer comprises a drug release layer.

16. The adhesive dressing of claim 1, further comprising friction-reducing media disposed within or on the topcoat.

17. A method of making an adhesive dressing, comprising forming a backing layer;disposing a topcoat having an inner surface and an outer surface onto a first side of the backing layer, wherein the inner surface is disposed on the backing layer; and,wherein the outer surface comprises a friction-reducing surface finish having a coefficient of friction equal to or less than about 0.6 as measured by ASTM 1894-95.

18. The method of claim 17, further comprising disposing a pressure-sensitive adhesive layer onto a side of the backing layer opposite the first side.

19. The method of claim 17 wherein the outer surface has a matte finish.

20. A method of making an adhesive dressing, comprising disposing a curable topcoat composition having an inner surface and an outer surface onto a first side of a backing layer, wherein the inner surface is disposed on the first side of the backing layer;texturing at least a portion of the outer surface of the topcoat composition; andcuring the curable topcoat composition, to provide at least a portion of the outer surface with a friction-reducing surface finish having a coefficient of friction equal to or less than about 0.6 as measured by ASTM 1894-95.

21. The method of claim 20, wherein texturing comprises contacting the outer surface with a negative of the desired texture.

22. The method of claim 21, wherein the negative is disposed on a nip roller, embossing belt, masking film, coated release paper, or a combination comprising at least one of the foregoing.

23. The method of claim 20, wherein texturing is by distributing friction reducing media on the outer surface.

24. The method of claim 20, further comprising disposing a pressure-sensitive adhesive layer onto a side of the backing layer opposite the first side.

25. A method of making an adhesive dressing, comprising disposing a topcoat composition having an inner surface and an outer surface onto a first side of a backing layer, wherein the inner surface is disposed on the first side of the backing layer;texturing at least a portion of the outer surface of the topcoat composition to provide at least a portion of the outer surface with a friction-reducing surface finish having a coefficient of friction equal to or less than about 0.6 as measured by ASTM 1894-95.

26. The method of claim 25, further comprising disposing a pressure-sensitive adhesive layer onto a side of the backing layer opposite the first side.

27. A method of making an adhesive dressing, comprising disposing a topcoat composition having an inner surface and an outer surface onto a first side of a backing layer, wherein the inner surface is disposed on the first side of the backing layer, wherein the first side of the backing layer is textured, and wherein at least a portion of the outer surface of the topcoat composition has a friction-reducing surface finish having a coefficient of friction equal to or less than about 0.6 as measured by ASTM 1894-95.

28. The method of claim 27, wherein the first side of the backing layer is textured by casting a backing layer composition onto a negative of the textured surface.

29. The method of claim 28, wherein the negative of the textured surface is on a release layer.