Compression resistant expanded, porous polytetrafluoroethylene c

Details Compression resistant expanded, porous polytetrafluoroethylene c Compression resistant expanded, porous polytetrafluoroethylene c

1985-04-01

1985-10-15

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283197, 428421, 428422, B32B 522, B32B 526, B32B 530

Patent

active

045474249

ABSTRACT:
A composite laminated article is provided, useful for printed circuit boards in transmission of electrical signals in the high frequency range of the order of 10 GHz, comprising a layer of expanded, porous polytetrafluoroethylene (PTFE), maintained in a fully stretched state, affixed firmly to a solid substrate layer. The composite is formed by stretching extruded, unsintered PTFE, after removal of lubricant, holding the stretched PTFE in its fully stretched state, and bonding the stretched PTFE to a substrate. The porous PTFE layer in this composite has unexpectedly high compression resistance.

REFERENCES:
patent: 4236952 (1980-12-01), Krause et al.
patent: 4252858 (1981-02-01), Chao et al.
patent: 4283448 (1981-08-01), Bowman
patent: 4478898 (1984-10-01), Kato

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