Polytetrafluoroethylene porous material and process for producin

Details Polytetrafluoroethylene porous material and process for producin Polytetrafluoroethylene porous material and process for producin

1991-09-03

1992-04-07

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264127, 2642107, 264211, 2642112, 521 56, 521 59, 521 60, 521145, C08J 924

Patent

active

051029219

ABSTRACT:
A polytetrafluoroethylene porous material and a process for producing the same are disclosed, the material comprising a mixture of polytetrafluoroethylene having a number-average molecular weight of 2,000,000 or more and polytetrafluoroethylene having a number-average molecular weight of 1,000,000 or less, the material having been stretched at least uniaxially.

REFERENCES:
patent: 4110392 (1978-08-01), Yamazaki
patent: 4707314 (1987-11-01), Kawahigashi et al.
patent: 4760102 (1988-07-01), Moriyama et al.
patent: 4826725 (1989-05-01), Harlow
patent: 5006292 (1991-04-01), Shii et al.

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