Back to results
US 11,628,092 B2Granted
Composite foam in wound treatment
AssigneeMölnlycke Health Care AB
InventorsEric S. Gardiner, Magnus Paledzki, Jason Raymond Johnson
Life of this patent
Estimating the term…
Abstract
A composite material is described, which is of particular use in wound treatment, and to a method for producing said composite material is also described. The composite material has a first foam layer having a first hydrophilic polyurethane foam material, and, in immediate contact therewith, a second foam layer having a second hydrophilic polyurethane foam material, which second hydrophilic foam material is different from the first hydrophilic foam material.
Claims16
A composite material comprising:
- a first foam layer comprising a first hydrophilic polyurethane foam material, wherein said first foam layer has a first side adapted to face an area of application in use,
- a second foam layer comprising a second hydrophilic polyurethane foam material, wherein the fluid retention capacity of said second foam layer is at least 20% greater than the fluid retention capacity of said first foam layer, wherein said fluid retention capacity is defined as the capability of retaining Solution A having first absorbed a maximum amount of Solution A, according to EN 13726-1:2002, when exposed to a pressure of 40 mmHg for two minutes,
- and wherein a plurality of channels extends from said first side of said first foam layer through the entire first foam layer into at least a portion of said second foam layer, wherein the channels have an average diameter of from 0.1 mm to 4.0 mm, wherein each channel of the plurality of channels is an open structure.
A composite material comprising:
- a first foam layer comprising a first hydrophilic polyurethane foam material, wherein said first foam layer has a first side adapted to face an area of application in use,
- a second foam layer comprising a second hydrophilic polyurethane foam material,
- wherein an interfacial bonding volume exists between said first and said second foam layer,
- wherein said interfacial bonding volume comprises a mixture of the materials making up said first and said second foam layer,
- and wherein said interfacial bonding volume has a thickness of less than 200 μm,
- and wherein a plurality of channels extends from said first side of said first foam layer through the entire first foam layer into at least a portion of said second foam layer, wherein the channels have an average diameter of from 0.1 mm to 4.0 mm, wherein each channel of the plurality of channels is an open structure.
3 more elements
A composite material comprising:
- a first foam layer comprising a first hydrophilic polyurethane foam material, wherein said first foam layer has a first side adapted to face an area of application in use,
- a second foam layer comprising a second hydrophilic polyurethane foam material,
- wherein a plurality of channels extends from said first side of said first foam layer through the entire first foam layer into at least a portion of said second foam layer, wherein the channels have an average diameter of from 0.1 mm to 4.0 mm, wherein each channel of the plurality of channels is an open structure.
Dependencies are inferred from the claim text.