Mitsubishi Kasei Corporation

Hiroshi Tahara

Akira Nakagoshi

Tetuo Yamada

Hiroyuki Sekiguchi

Hidemi Murata

A process for producing pitch-type carbon fibers, which comprises melt-spinning pitch material in a gaseous atmosphere to form pitch fibers, gathering the pitch fibers in the presence of an oiling agent into a tow, followed by infusible treatment, carbonization treatment and, if necessary, graphitization treatment, of the tow of pitch fibers, characterized in that the tow of pitch fibers is brought in contact with a washing liquid to wash the surface of the pitch fibers prior to the infusible treatment.

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Kitakyushu, Japan

Hiroshi Tahara