W. L. Gore & Associates, Inc.

Gore Enterprise Holdings, Inc.

Michael E Hodgins

Justin John Skaife

David J Luber

William G Hardie

Peter J Walsh

Gary L Sturgill

Asymmetric expanded polytetrafluoroethylene (ePTFE) membranes that contain multiple layers of ePTFE where at least one layer of ePTFE has a microstructure different from the microstructure of a second ePTFE layer. In exemplary embodiments, the asymmetric membrane contains a first ePTFE layer that has an 'open' microstructure and a second ePTFE layer that has a less open, or 'tight' microstructure. A third ePTFE layer having an &#x201c;open&#x201d; microstructure may be positioned on the second ePTFE layer. The asymmetric membranes possess print durability and are both abrasion resistant and air permeable. Additionally, printed asymmetric ePTFE membranes demonstrate low gloss. A textile may be affixed to the asymmetric membrane such that the first ePTFE layer is the outer surface of the laminate. Laminates containing the asymmetric membrane are sufficiently durable against abrasion so that articles of apparel having an exterior film surface remain liquid proof after an abrasion challenge.

Low gloss, air permeable, abrasion resistant, printable laminate containing an asymmetric membrane and articles made therefrom

A contamination-resistant air permeable fabric laminate is disclosed that comprises a textile layer attached by discontinuous attachments to an asymmetric porous membrane comprising at least two porous regions or layers through the thickness of the membrane. Methods for making the fabric laminate are disclosed as well as garments made therefrom.

Contamination resistant air permeable fabric laminate and garments made therefrom

Asymmetric expanded polytetrafluoroethylene (ePTFE) membranes that contain multiple layers of ePTFE where at least one layer of ePTFE has a microstructure different from the microstructure of a second ePTFE layer. In exemplary embodiments, the asymmetric membrane contains a first ePTFE layer that has an 'open' microstructure and a second ePTFE layer that has a less open, or 'tight' microstructure. A third ePTFE layer having an &#x201c;open&#x201d; microstructure may be positioned on the second ePTFE layer. The asymmetric membranes possess print durability and are both abrasion resistant and air permeable. Additionally, printed asymmetric ePTFE membranes demonstrate low gloss. A textile may be affixed to the asymmetric membrane such that the first ePTFE layer is the outer surface of the laminate. Laminates containing the asymmetric membrane are sufficiently durable against abrasion so that articles of apparel having an exterior film surface remain liquidproof after an abrasion challenge.

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Lincoln University, PA, United States of America

Michael E Hodgins