Toray Industries, Inc.

Tory Industries Inc.

Shinji Kochi

Kenichi Yoshioka

Masayuki Miyoshi

Toshiya Kamae

Hiroshi Taiko

Atsuhito Arai

Koji Furukawa

Shiori Kawamoto

Ayumi Matsuda

Bon Aizawa

Ryuichi Kitahara

Takahiro Nishimura

Naoya Takeda

Naofumi Yamashita

Yumi Kunimitsu

Yui Fujioka

Daisuke Kido

A prepreg contains components [A] to [E], wherein 85% by mass or more of the component [E] is present in a range within 9% of the average thickness of the prepreg from each surface of the prepreg, and a range within 7% of the average thickness of the prepreg from each surface of the prepreg is composed of a first resin composition containing components [B] to [E].

Prepreg and fiber reinforced composite material

A prepreg containing at least the following components [A]-[F], wherein the ratio Ne/Nd of the number of structures Ne of component [F] present in a range of outside 110% of the particle diameter of component [E] and the number of structures Nd of component [F] present in a range outside 110% of the particle diameter of component [D] is 0.25 or higher. [A]: Carbon fibers, [B] thermosetting resin, [C]: curing agent, [D]: particles composed mainly of thermoplastic resin having a primary particle number-average particle size of 5-50 &#x3bc;m, [E]: conductive particles different from component [D] and having a primary particle number-average particle size in the range of a specific expression, [F]: filler comprising a carbon material.

Disclosed herein are an epoxy resin composition for fiber-reinforced composite materials which has low viscosity, high Tg, high elastic modulus, and excellent fracture toughness and a fiber-reinforced composite material using such an epoxy resin composition which has excellent thermal properties, compressive strength, impact resistance, fatigue resistance, and open-hole tensile strength and which is suitable for producing structural parts of aircraft and the like. The epoxy resin composition comprises at least a given bifunctional epoxy resin as a component (A), a liquid aromatic diamine curing agent as a component (B), and core-shell polymer particles as a component (C), wherein the core-shell polymer particles as the component (C) contain epoxy groups in their shell and have a volume-average particle size of 50 to 300 nm.

Epoxy resin composition, fiber-reinforced composite material, and method for producing the same

A binder composition comprising [A] an amorphous polyamide with a glass transition temperature of 140&#xb0; C. or higher having a dicyclohexylmethane skeleton in the molecule and [B] a sulfonamide compound is used to provide a binder composition, a reinforcing-fiber base material and a preform respectively most suitable for RTM, which respectively exhibit excellent impact resistance and physical properties remaining stable over the variations of molding conditions and can be used for producing a fiber-reinforced composite material most suitable for members such as primary structures of aircraft.

Binder composition, reinforcing-fiber base material, preform, fiber-reinforced composite material, and manufacturing method therefor

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Ehime, Japan

Shinji Kochi