Method for fabricating a graphite film for use as an electroacou

Details Method for fabricating a graphite film for use as an electroacou Method for fabricating a graphite film for use as an electroacou

1990-11-02

1991-08-27

Hix, L. T.

Coating processes

Electrical product produced

Carbon base

427227, 427386, B05D 300, B05D 512

Patent

active

050431854

ABSTRACT:
An electroacoustic diaphragm is provided, which diaphragm comprising a pyrolytic graphite film obtained from a polymer selected from polyoxadiazole, an aromatic polyimide obtained by polycondensation of pyromellitic acid and an aromatic diamine, polybenzthiazole, polybenzbisthiazole, polybenzoxazole, polybenzbisoxazole, poly(pyromellitimide), poly(m-phenyleneisophthalamide), poly(m-phenylenebenzoimidazole), poly(m-phenylenebenzobisimidazole), polythiazole and poly(m-phenylenevinylene. The graphite film has a discontinuous layer of a polymeric material formed on and in the film whereby not only good electroacoustic characteristics, but also good mechanical strength and good adhesion of an adhesive applied thereof are obtained. A method for fabricating such diaphragm is also described.

REFERENCES:
patent: 4112168 (1978-09-01), Schafft
patent: 4221773 (1980-09-01), Tsukagoshi et al.
patent: 4271045 (1981-06-01), Steigerwald et al.
patent: 4915984 (1990-04-01), Murakami

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