Composite materials in wound treatment
AssigneeMölnlycke Health Care AB
InventorsEric S. Gardiner, Magnus Paledzki
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Abstract
The present invention relates to a composite material, which is of particular use in wound treatment, and to a method for producing the same composite material. Said composite material comprises a hydrophilic polyurethane foam material comprising a first polyurethane polymer; a hydrophilic fiber material comprising a second polymer, wherein said second polymer is not a polyurethane polymer and wherein said fiber material is capable of absorbing and retaining a fluid. In the composite material according to the present invention, said first polymer is covalently bonded to said second polymer.
Claims17
A composite material comprising:
- a hydrophilic polyurethane foam material comprising a first polyurethane polymer;
- a hydrophilic fiber material comprising a second polymer, wherein said second polymer is not a polyurethane polymer;
- wherein said fiber material is capable of absorbing and retaining a fluid,
- wherein said hydrophilic polyurethane foam material is comprised in a foam layer, and said hydrophilic fiber material is comprised in a fiber layer, wherein the thickness of said foam layer and/or said fiber layer, independently, is at least 100 μm, and
- wherein said first polyurethane polymer is covalently bonded to said second polymer.
A method for producing a composite material, comprising the steps of:
- (i) preparing an aqueous mixture comprising a prepolymer;
- (ii) casting said aqueous mixture from step (i) onto a carrier material;
- (iii) applying, before said aqueous mixture is essentially completely cured, a layer of a fiber material capable of absorbing and retaining a liquid, on top of said aqueous mixture as cast onto said carrier material;
- (iv) allowing said aqueous mixture to essentially completely cure, thereby producing a composite material comprising a foam layer covalently bonded to said layer of fiber material;
- (v) optionally drying said composite material.
Dependencies are inferred from the claim text.