Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Autogenously or by activation of dry coated particles
Patent
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.
Harada Akira
Mano Hiroshi
Foelak Morton
Sumitomo Electric Industries Ltd.
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