Polyimide and fluoropolymer containing films and laminates

Details Polyimide and fluoropolymer containing films and laminates Polyimide and fluoropolymer containing films and laminates

1991-06-19

1992-04-21

Herbert, Jr., Thomas J.

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Structurally defined web or sheet

Including components having same physical characteristic in...

428220, 428336, 428337, 428349, 428377, 428383, 428422, 4284735, B32B 2708, B32B 312

Patent

active

051066734

ABSTRACT:
A multi-layer film of improved adhesive strength and other properties is made by combining a layer of polyimide and one or more layers of fluoropolymer selected from the group consisting of PTFE, thermally compatible TFE copolymers, blends thereof, PVF.sub.2, thermally compatible VF.sub.2 copolymers, blends thereof, PCTFE, thermally compatible CTFE copolymers, and blends thereof. It has been found that the peel adhesion between the polyimide layer and any fluoropolymer layer is greatly improved over known products. Laminated composites of improved adhesion and cohesion are made using such a multi-layer film and at least one fluoropolymer film. The fluoropolymer film is thermally weldable to the polyimide film.

REFERENCES:
patent: 3455774 (1969-07-01), Lindsey et al.
patent: 3616177 (1971-10-01), Gumerman
patent: 3642569 (1972-02-01), Gerow
patent: 4335238 (1982-06-01), Moore et al.
patent: 4628003 (1986-12-01), Katz
patent: 4770927 (1988-09-01), Effenberger et al.
patent: 4883716 (1989-11-01), Effenberger et al.
Du Pont Kapton.RTM. Polyimide Film, Jun. 22, 1970, "A Light Extremely Tough Insulation Available for Highest Reliability Performance", 12 pages.

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