Patent ID: 7943003
Filing Date: 2011-05-17
Classification: B29C,B29L,B32B,C09J,F16J,G01M,G01N,Y10T

Abstract:
1. A method of forming a composite tape comprising the steps of: a. providing at least two porous expanded polytetrafluoroethylene (ePTFE) tapes, the tapes having a plurality of ePTFE layers, upper and lower layers, and side surfaces extending between upper and lower layers, b. providing at least one material capable of forming a substantially air impermeable layer, c. bonding the at least one material on at least one side surface of each of the at least two ePTFE tapes to form a substantially air impermeable layer comprising the steps of d. joining at least two ePTFE tapes along side surfaces comprising the steps of