Polytetrafluoroethylene porous material and process for producin

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

1990-06-15

1992-05-05

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

2642107, 264211, 2642112, 521 56, 521 60, 521145, 521134, 521 59, B27J 500, B29C 4740

Patent

active

051105276

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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