Patent ID: 6517919
Filing Date: 2003-02-11
Classification: B01D,Y10T

Abstract:
A laminate product comprising:(a) a first layer comprising porous expanded polytetrafluoroethylene membrane having an air permeability of at least 0.01 cubic feet per square foot at 0.5 inch water gauge, and a thickness of greater than about 0.5 mil; and (b) a second layer comprising woven fabric of polytetrafluoroethylene containing yarn, wherein the woven fabric has a weight of between about 15 opsy and about 30 opsy; wherein the porous expanded polytetrafluoroethylene membrane is provided adjacent to woven fabric of polytetrafluoroethylene containing yarn and the porous expanded polytetrafluoroethylene membrane is thermally bonded to the woven fabric of polytetrafluoroethylene containing yarn.