Flexible water and oil resistant composites

Details Flexible water and oil resistant composites Flexible water and oil resistant composites

1997-06-25

2000-06-13

Pezzuto, Helen L.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283155, 4283193, 428422, 4284231, 428523, B32B 326

Patent

active

060747382

ABSTRACT:
This invention provides air impermeable liquid-water resistant water-vapor-permeable composites that are highly oleophobic and some of which have enhanced water-vapor-permeable properties.
In its broadest aspect, the composites comprise: a layer of a microporous polymer that is water-vapor permeable and which is oleophobic, and which is liquid water-resistant. This layer is in contact with an air-impermeable, liquid water resistant, polymer layer that is permeable to water-vapor molecules. The oleophobic microporous polymer layer confers enhanced oleophobicity. In another aspect, a third layer of a microporous, water vapor permeable polymer can also be present on the other side of the air-impermeable polymer layer.

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