Foamed fluoropolymer articles having low loss at microwave frequ

Details Foamed fluoropolymer articles having low loss at microwave frequ Foamed fluoropolymer articles having low loss at microwave frequ

1983-07-12

1985-12-24

Anderson, Philip

Electricity: conductors and insulators

Conduits, cables or conductors

Conductive armor or sheath

29828, 264 459, 264 53, 264DIG5, 174110F, 333243, 521145, B29D 2700, H01B 1118, H01B 1324, H01P 306

Patent

active

045608296

ABSTRACT:
Foamed polymers having low loss at microwave frequencies are prepared through use of perfluorinated alkane foaming agents. The invention is particularly valuable for polymers which are melt-processed at high temperatures, especially fluoropolymers such as tetrafluoroethylene copolymers. The polymeric foams are particularly useful as electrical insulation, especially for coaxial cables suitable for use at microwave frequencies.

REFERENCES:
patent: 3972970 (1976-08-01), Taylor
patent: 4099897 (1978-07-01), Takano et al.
patent: 4107354 (1978-08-01), Wilkenloh et al.
patent: 4304713 (1981-12-01), Perelman
patent: 4352701 (1982-10-01), Shimba et al.

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