Polyurethane foam for use in a wound pad
AssigneeMölnlycke Health Care AB
InventorsStefan Areskoug, James W. Davis, William Laliberte, Eva Larkö Sander
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Abstract
Described is a polyurethane foam use as a wound pad or wound pad layer, wherein the polyurethane foam has an antimicrobial salt. Also described is a wound pad and a wound dressing that includes the polyurethane foam, a method for manufacturing a wound pad or wound pad layer and to a method for manufacturing a wound dressing.
Claims9
A polyurethane foam for use as a wound pad or a wound pad layer, wherein said polyurethane foam comprises at least one silver salt, wherein an amount of silver salt in said polyurethane foam consists of from 0.4 to 2.4% by weight, wherein said polyurethane foam further comprises sodium sulfate, wherein an amount of sodium sulfate in said polyurethane foam consists of from 0.2 to 3.0% by weight, wherein the sodium sulfate enhances the release of the at least one silver salt in the polyurethane foam during use of the wound pad or the wound pad layer.
A method for manufacturing a wound pad or wound pad layer comprising:
- a) providing a water phase comprising at least one silver salt and at least one surfactant, b) mixing the water phase with a polyurethane pre-polymer, c) transferring the mixture obtained in step b) to a mould or a continuous web to form a polyurethane foam;
- and d) drying the polyurethane foam to form a wound pad or wound pad layer, wherein an amount of silver salt in said dried polyurethane foam consists of from 0.4 to 2.4% by weight, wherein an amount of sodium sulfate in said dried polyurethane foam consists of from 0.2 to 3.0% by weight, characterized in that said water phase in said step a) further comprises sodium sulfate such that the sodium sulfate enhances the release of the at least one silver salt in the formed polyurethane foam during use of the wound pad or the wound pad layer.
Dependencies are inferred from the claim text.