Petoca, Ltd.

Hiroshi Eziri

Tetsuo Yamada

Hidekazu Saito

Carbon fibers are provided essentially consisting of liquid crystal pitch based continuous monofilaments having an average filament diameter of 30 .mu.m or greater. The carbon fibers can have modulus of elasticity of 80,000 Kgf/mm.sup.2 or greater and tensile strength of 200 Kgf/mm.sup.2 or greater. The carbon fibers can be used as a multifilament fiber consisting of plural monofilaments as in the case of conventional carbon fibers but it is particularly preferable that a number of constituting monofilaments is one.

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Ibaraki-ken, Japan

Hiroshi Eziri