Process for producing filled porous PTFE products

Details Process for producing filled porous PTFE products Process for producing filled porous PTFE products

1975-12-03

1978-06-20

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264127, 264211, 264288, 264289, B29D 724

Patent

active

040962270

ABSTRACT:
This invention provides a tetrafluoroethylene polymer in a porous form which has an amorphous content exceeding about 5% and which has a micro-structure characterized by nodes interconnected by fibrils. The material has high porosity and high strength. It can be used to produce all kinds of shaped articles such as films, tubes, rods, and continuous filaments. Laminations can be employed and impregnation and bonding can readily be used to produce a large variety of articles. Compressed articles of very high strength can also be produced from these porous forms.

REFERENCES:
patent: 2915786 (1959-12-01), Haroldson et al.
patent: 3544671 (1970-12-01), Sandiford
patent: 3637906 (1972-01-01), Parathoen
patent: 3664915 (1972-05-01), Gore
patent: 3953566 (1976-04-01), Gore

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