Mitsubishi Rayon Company, Limited

Shinobu Fujie

Hiroshi Takeuchi

Naoki Sugiura

Takeshi Kato

Kazuhiko Hotta

Kunio Iwase

Akio Iwamoto

Akihiko Fukushima

A method to prepare a carbon fiber bundle which can develop satisfactory interfacial adhesion to polyolefin-based resins, especially polypropylene resins, is provided. The carbon fiber bundle comprises a plurality of single fibers sized with a sizing agent comprising: a polymer having a main chain formed of carbon-carbon bonds, containing an acid group in at least part of side chains or at least a part of main chain ends, and having an acid value of 23 to 120 mg KOH/g as measured in accordance with ASTM D1386; or a polymer having a main chain formed of carbon-carbon bonds and containing at least either of an epoxy group and an ester group in at least a part of side chains or at least a part of main chain ends.

Method for producing a carbon fiber bundle

Thermosetting coating composition

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Tokyo, Japan

Shinobu Fujie