Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Mistubishi Chemical Corporation

Sumitomo Electric Industries, Limited

Kenichi Watanabe

Manabu Kaneko

Tomoko Ishimoto

Hiroshi Tategaki

Atsushi Takahashi

Takahiro Hayashi

Takeshi Ishikawa

Takayuki Kobayashi

Takuya Teranishi

Masao Tomioka

Saki Fujita

Yasuhiro Fukuhara

Keigo Yoshida

Akinobu Sasaki

Sanae Kita

Morio Katagiri

Masahiro Oosuka

Nobuyuki Yamamoto

Keizo Harada

Masayuki Ishii

Shosaku Yamanaka

Tetsuya Atsumi

Masahiro Hata

Takayuki Kiriyama

Hiroyuki Nakao

Masashi Shimahara

Yasunori Murano

Provided are an epoxy resin composition which contains an epoxy resin and a curing agent, and satisfies the following (1), (2), and (3):

Epoxy resin composition, and film, prepreg, and fiber-reinforced plastic using same

Provided are a carbon fiber thermoplastic resin prepreg which is a carbon fiber prepreg obtained by impregnating a PAN-based carbon fiber in which the average fiber fineness of a single fiber is 1.0 dtex to 2.4 dtex with a thermoplastic resin, wherein the thermoplastic resin satisfies 20&#x2264;(FM/FS)&#x2264;40 (where FM: flexural modulus (MPa) of a resin sheet comprising only the thermoplastic resin, and FS: flexural strength (MPa) of the resin sheet), a method for manufacturing the same, and a carbon fiber composite material employing the carbon fiber prepreg.

Carbon fiber thermoplastic resin prepreg, carbon fiber composite material and producing method

An epoxy-resin composition of the components (A), (B), (D) and (E), where component (A) is an epoxy resin having an oxazolidone-ring structure, (B) is a bisphenol bifunctional epoxy resin with a number-average molecular weight of at least 600 but no more than 1300, which does not have an oxazolidone-ring structure, (D) is a triblock copolymer, and (E) is a curing agent. A film made of the epoxy-resin composition, a prepreg and a fiber-reinforced plastic is also disclosed. The epoxy resin composition is capable of achieving both a processability of a prepreg at room temperature and a suppression of voids in the molded product. A fiber-reinforced plastic having excellent mechanical properties, especially excellent fracture toughness and heat tolerance, is also obtained by using the epoxy-resin composition.

Epoxy-resin composition and film, prepreg, and fiber-reinforced plastic using same

Provided is a carbon fiber manufacturing method including a surface treatment step of ejecting an ozone solution in which ozone is dissolved in solvent from a fluid ejecting port toward a carbon fiber bundle and causing the ozone solution to pass between single fibers of the carbon fiber bundle so as to contact surfaces of the single fibers so that the surfaces of carbon fibers are treated by the ozone solution. Also, provided is a carbon fiber subjected to a surface treatment by the carbon fiber manufacturing method.

Carbon fiber manufacturing method and carbon fiber

The present invention relates to an epoxy-resin composition comprising the following components (A), (B), (C) and (D), a film made of the epoxy resin composition, a prepreg and a fiber-reinforced plastic. The present invention can provide an epoxy-resin composition that cures at a low temperature in a short period of time. Also, the present invention can provide a fiber-reinforced plastic having excellent mechanical characteristics, especially excellent fracture toughness and heat tolerance, is made from the epoxy-resin composition. 

Epoxy-resin composition, and film, prepreg and fiber-reinforced plastic using the same

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Toyohashi, Japan

Kenichi Watanabe