Wound dressing with controllable permeability
AssigneePolyRemedy, Inc.
InventorOleg SINIAGUINE
Life of this patent
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Abstract
Wound dressings and methods of manufacturing wound dressings are provided. The wound dressings include portions that are converted from a moisture vapor permeable material to a material having reduced moisture vapor permeability. The conversion may be accomplished in a variety of ways. In some embodiments, a solvent is used to dissolve a porous material to thereby form a non-porous film. In other embodiments, heat is applied to melt a porous material to thereby form a non-porous film. The heat may be applied using a heated gas or a heating element to directly or indirectly heat the material.
Claims32
A method of fabricating a wound dressing comprising a wound facing surface and an exterior surface opposite the wound facing surface, said method comprising:
- providing a first sheet comprising a moisture vapor permeable material;
- and
- converting a portion of the first sheet to reduce the moisture vapor permeability of the portion of the first sheet.
A method of fabricating a wound dressing, comprising:
- positioning a first sheet adjacent to a second sheet, the second sheet comprising a first layer and a second layer, wherein the first layer is moisture vapor permeable and the second layer has a lower melting point than the first layer;
- and
- bonding the first sheet to the second sheet by heating the second layer of the second sheet to a temperature higher than the melting point of the second layer and lower than the melting point of the first layer so as to melt a portion of the second layer of the second sheet and bond the second layer of the second sheet to the first layer.
A wound dressing comprising a wound facing surface and an exterior surface opposite the wound facing surface, said wound dressing comprising:
- a first layer having a moisture vapor permeable region and a reduced moisture vapor permeable region;
- p1 wherein said moisture vapor permeable region is made of a porous or fibrous material, and said reduced moisture vapor permeable region is made of a film.
A dressing, comprising:
- a first sheet, said first sheet being moisture vapor permeable;
- and
- a second sheet comprising a first layer and a second layer, wherein the first layer is moisture vapor permeable and the second layer has a lower melting point than the first layer;
- wherein the second layer of the first sheet is bonded to the second sheet.
Dependencies are inferred from the claim text.