Process of manufacturing porous multi-expanded fluoropolymers

Details Process of manufacturing porous multi-expanded fluoropolymers Process of manufacturing porous multi-expanded fluoropolymers

1988-11-03

1991-12-10

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

With reshaping or surface embossing of formed article

264127, 2642888, 2642893, 2642902, 428422, 526255, B29C 5522, C08F 1426

Patent

active

050716093

ABSTRACT:
Interpenetrated matrix of polytetrafluoroethylene and elastomer is disclosed. The matrix is formed into a composite material which is flexible, durable, highly porous with a tight microporous structure and improved retractability. The composite material is subjected to a multi-expansion process to produce shaped articles such as films, tubes, rods and filaments with excellent flexibility and elasticity. More particularly, the composite material can be utilized to produce vascular grafts with excellent biological compatibility.

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patent: 4187390 (1980-02-01), Gore
patent: 4248924 (1981-02-01), Okita
patent: 4555543 (1985-11-01), Effenberger et al.

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