Wound dressing with adhesive margin

Patent metadata

Field	Value
Publication number	US-12433796-B2
Application number	US-202117468964-A
Country	US
Kind code	B2
Filing date	Sep 8, 2021
Priority date	Dec 18, 2012
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A wound dressing comprising: a backing sheet; a layer of pressure-sensitive adhesive on the backing sheet; an island of absorbent material having smaller area than the backing sheet and applied onto a central region of the backing sheet so as to leave a margin of adhesive-coated backing sheet around the absorbent material, and an apertured wound facing layer applied over the absorbent material and adhered to the backing sheet around said island by said pressure-sensitive adhesive, wherein the apertured wound facing layer comprises an apertured substrate having a coating of a silicone gel on the wound facing surface thereof, the open area of the apertured wound facing layer is from about 5% to about 75%, and the apertured wound facing layer comprises apertures having an open area of from about 2 mm2 to about 100 mm 2 .

First claim

What is claimed is:

1. A method of making a wound dressing, comprising:
forming a precursor laminate comprising a layer of silicone sandwiched between a polymeric film support sheet and a release sheet;
die cutting aperture perimeters through the polymeric film support sheet and the silicone layer; and
removing the release sheet to leave an apertured layer comprising an apertured polymeric film having a coating of a silicone gel on a wound-facing surface of the apertured polymeric film, wherein removing the release sheet further comprises removing a fill formed by die cutting aperture perimeters.

2. The method of claim 1 , wherein the silicone is a fluid silicone pre-polymer.

3. The method of claim 2 , further comprising curing said fluid silicone pre-polymer.

4. The method of claim 1 , wherein said precursor laminate is formed by disposing a layer of a fluid silicone prepolymer on said release sheet, curing said fluid silicone prepolymer, and disposing said polymeric film support sheet on the silicone layer.

5. The method of claim 1 , further comprising:
coating a surface of a backing sheet with a layer of pressure-sensitive adhesive; applying an island of absorbent material to a central region of the adhesive-coated surface of the backing sheet, wherein the absorbent material has a smaller area than the backing sheet so as to leave an adhesive-coated margin of the backing sheet around the island; and
applying said apertured layer over said island with said polymeric film support sheet facing the backing sheet, wherein a margin of said apertured layer is adhered to said adhesive-coated margin around said island.

6. The method of claim 1 , wherein die cutting aperture perimeters through the polymeric film support sheet and the silicone layer comprises leaving the release sheet free of any cuts.

Assignees

• Kci Usa Inc

Inventors

• Pigg William
• Delbono Michelle
• Stephens Sally

Classifications

• A61F13/0246

  characterised by the skin-adhering layer · CPC title

• A61F13/0203

  with fluid retention members · CPC title

• A61F13/0206 Primary

  with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings · CPC title

• A61F13/025

  having a special distribution arrangement of the adhesive · CPC title

• A61F2013/15715

  Shaping or making outer layers · CPC title