Nippon Carbon Co., Ltd.

Isao Sugiura

Hiroshi Yamazoe

Toshikatsu Ishikawa

Kazuhisa Kawazumi

Composite sheets comprising expanded graphite, a sheet-like metallic core inserted therein and, if desired, a binder for the expanded graphite. In one embodiment, gaskets are prepared from the composite sheets.

Composite graphite sheets

A process for the production of flexible graphite comprising incorporating particulate expanded graphite having a c direction expansion at least 10 times as great as that of the original c direction dimension with an organo-silicon high molecular weight compound having carbon and silicon as the skeletal components, such as polysilmethylenesiloxane, or with a colloidal silica, drying the resulting mixture, pressure molding the dried mixture and heat treating the molded mixture at 500.degree.-2000.degree. C. thereby to produce the flexible graphite. In one embodiment, this invention relates to flexible graphite obtained by the process.

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Yokohama, Japan

Isao Sugiura