Low stress to seal expanded PTFE gasket tape

Details Low stress to seal expanded PTFE gasket tape Low stress to seal expanded PTFE gasket tape

2011-05-17

2011-05-17

Goff, John L (Department: 1746)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S324000

Reexamination Certificate

active

07943003

ABSTRACT:
A low stress to seal, unitary gasket tape is provided that is particularly suited for use in form-in-place gaskets. The gasket tape preferably comprises at least two joined porous expanded polytetrafluoroethylene (ePTFE) tapes aligned along tape side surfaces and a substantially air impermeable layer there between. The plane of expansion of the ePTFE is substantially parallel to the flange surface providing longitudinal and transverse strength. The substantially air impermeable layer prevents fluid from permeating through the gasket in the radial direction.

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“Unit Cell Information on Some Important Polymers”, Physical Properties of Polymers Handbook, Chapter 30, American Insitute of Physics, 1996.

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