Manufacture of polyimide film by solvent casting

Details Manufacture of polyimide film by solvent casting Manufacture of polyimide film by solvent casting

1981-04-17

1983-09-20

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

2642902, 528 73, 528229, 528353, B29D 702, B29D 724

Patent

active

044055501

ABSTRACT:
Polyimide film is manufactured by solvent casting onto a film-supporting surface. A solution of polyimide resin is dissolved in hot organic solvent to provide a casting dope. The film is coagulated by contacting an aqueous medium, substantially replacing the organic solvent in the film with water. Orienting the water-containing film and drying the oriented film to remove water produces a substantially homogeneous polyimide film having high electrical resistance, flexibility and strength.

REFERENCES:
patent: 3247165 (1966-04-01), Rodia
patent: 3619461 (1971-11-01), Gary
patent: 3862897 (1975-01-01), Gattus et al.
patent: 3867500 (1975-02-01), Traynor
patent: 3899309 (1975-08-01), Hoehn et al.
patent: 4066731 (1978-01-01), Hungerford
patent: 4272467 (1981-06-01), Johnson

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