Toray Industries, Inc.

Mitsui Chemicals, Inc.

Tobishi Pharmaceutical Co., Ltd.

Masato Honma

Takashi Fujioka

Yoshiki Takebe

Naokichi Imai

Atsuki Tsuchiya

Tomohiro Takehara

Kotaro Shinohara

Mitsushige Hamaguchi

Noriyuki Hirano

Jun Misumi

Satoshi Seike

Kyoko Shinohara

Koji Yamauchi

Shunsuke Horiuchi

Shoji Murai

Takafumi Suzuki

Satomi Hiasa

Kentaro Sano

Keiichi Asami

Ryuji Sawaoka

Haruo Obara

Hideaki Tanisugi

Yoshifumi Nakayama

Soichi Ishibashi

Hideaki Sasaki

Yasunori Nagashima

Kosuke Shiho

Takashi Hasegawa

Yuji Kojima

Yoshihumi Nakayama

Seiichiro Eto

Takeshi Nishizawa

Souichi Ishibashi

Yuichiro Sento

Makiko Saito

Eisuke Wadahara

Atsuhito Arai

Koji Furukawa

Shiro Honda

Akihiko Kitano

Yuki Mitsutsuji

Akiyoshi Tamai

Kohei Yamashita

Takayuki Fujiwara

Kentaro Adachi

Masaru Akita

Hirobumi Senga

Daisuke Konishi

Yuta Naito

Yongling Wan

Yumi Ando

Ichiji Kageishi

Kaori Narimatsu

Terumasa Tsuda

Satomi Matsuo

Syuji Ishikawa

Shinichi Tamura

Takumi Honda

Miho Onodera

Terry Sakurai Brown

Takeshi Park-City Kitaoji 412 Nishizawa

An object of the present invention is to provide a prepreg and a laminate for producing a laminate suitable as a structural material, which have excellent joining strength and interlaminar fractural toughness values and can be firmly integrated with another structural member by welding. The present invention provides a prepreg including the following structural components, [A] reinforcing fibers, [B] an epoxy resin, and [C] a thermoplastic resin, wherein all epoxy resins included in [B] have an average epoxy value of 2.0 meq./g or more and 5.0 meq./g or less, [C] is present in a surface of the prepreg, and the reinforcing fibers [A] are present, which are included in a resin area including [B] and a resin area including [C] across an interface between the two resin areas.

Prepreg, laminate, and molding

A fiber-reinforced resin substrate is described in which a plurality of resins having differing properties are strongly composited, wherein the fiber-reinforced resin substrate is obtained by impregnating a thermoplastic resin (A) and a thermoplastic resin (B) into continuous reinforcement fibers, wherein a thermoplastic resin (A) layer, which comprises the thermoplastic resin (A) and is exposed at one surface, and a thermoplastic resin (B) layer, which comprises the thermoplastic resin (B) and is exposed at the other surface, form a boundary region, where at least some of the continuous reinforcement fibers exist in a manner spanning across the boundary region and both the thermoplastic resin (A) and the thermoplastic resin (B) are crystalline resins having a melting point of not less than 200° C.

Fiber-reinforced resin substrate, preform, integrated product, and method for producing fiber-reinforced resin substrate

A prepreg includes composition elements [A], [B], and [C] described below,

Prepreg, laminate, and integrated product

The present invention pertains to a fiber-reinforced plastic that has, as at least one of the surface layers in the thickness direction thereof, a layer containing reinforced fibers and a matrix in which a thermosetting resin and a thermoplastic resin are integrated. The reinforced fibers form discontinuous reinforced fiber bundles randomly stacked or discontinuous reinforced fiber bundles arranged in one direction. A portion of the discontinuous reinforced fiber bundles is in contact with both of the thermosetting resin and the thermoplastic resin. The thermoplastic resin is exposed in at least a portion of the surface of the surface layer.

Fiber-reinforced plastic and production method for fiber-reinforced plastic

A fiber-reinforced plastic substrate is described in which a plurality of resins having different properties are firmly compounded and that includes components [A], [B], and [C]:

Fiber-reinforced resin substrate, integrated molded article, and method for manufacturing fiber-reinforced resin substrate

The purpose of the present invention is to provide a sandwich structure that has both excellent heat dissipation properties and excellent mechanical properties. In order to achieve this purpose, the sandwich structure of the present invention has the following structure. The sandwich structure includes a core member (I), and a fiber reinforced member (II) disposed on both sides of the core member (I), wherein the core member (I) includes a sheet-shaped heat conductive member (III) having an in-plane thermal conductivity of 300 W/m·K or more.

Sandwich structure and method for manufacturing same

A method is described for producing a fiber-reinforced plastic substrate that simultaneously satisfies three points of joinability, mechanical characteristics, and productivity, the method including the following components [A], [B], and [C], wherein at least the following drawing step, first impregnating step, second impregnating step, and take-up step are continuously and sequentially performed while the component [A] is caused to run:

Method for producing fiber-reinforced plastic substrate, and fiber-reinforced plastic substrate and integrated molding thereof

An object of the present invention is to obtain a fiber-reinforced composite material achieving both lightweight properties and mechanical properties at a high level. The present invention is a fiber-reinforced composite material including: a resin (A); and a reinforcing fiber (B), and including: a fiber-reinforced structure portion including an in-plane orientation portion having an average fiber orientation angle of the reinforcing fiber (B) of 0° or more and 45° or less and an out-of-plane orientation portion having an average fiber orientation angle of the reinforcing fiber (B) of more than 45° and 90° or less; and a cavity portion defined by the in-plane orientation portion and the out-of-plane orientation portion of the fiber-reinforced structure portion.

Fiber-reinforced composite material and sandwich structure

An object of the present invention is to provide a prepreg and a laminate for producing a laminate suitable as a structural material, which have excellent joining strength and can be firmly integrated with another structural member by welding. The present invention provides a prepreg including the following structural components: [A] reinforcing fibers, [B] a thermosetting resin, and [C] a thermoplastic resin, wherein [A] has a surface free energy, measured by a Wilhelmy method, of 10 to 50 mJ/m, [C] is present on a surface of the prepreg, and the reinforcing fibers [A] are present, which are included in a resin area including [B] and a resin area including [C] across an interface between the two resin areas.

Prepreg, layered body, and molding

An object of the present invention is to obtain a fiber-reinforced composite material achieving both lightweight properties and mechanical properties at a high level. The present invention provides a fiber-reinforced composite material including a resin (A) and a reinforcing fiber (B), and having: a porous structure portion having micropores with an average pore diameter of 500 μm or less as measured by a mercury intrusion method; and a coarse cavity portion defined by the porous structure portion and having a maximum length of more than 500 μm as a cross-sectional opening portion.

Provided is a composite prepreg including a region (A) containing a thermosetting resin (a) and a reinforcing fiber and a region (B) containing a thermosetting resin (b) and a reinforcing fiber, the composite prepreg satisfying conditions (i) and (ii) or satisfying conditions (ii) and (iii):

Composite prepreg, preform using the same, fiber-reinforced composite material assembly, and method for producing the same

Provided is a method for producing a molded article having a thin film layer (B) formed on a surface of a porous body (A). The method includes a process (I) and a process (II) described below in this order:

Method for manufacturing molded article and preform of molded article

An object of the present invention is to provide a fiber-reinforced composite material achieving both lightweight properties and mechanical properties, a laminate thereof, and a prepreg capable of easily molding a sandwich structure thereof. The present invention is a prepreg comprising a reinforced fiber substrate (B) impregnated with a resin (A), wherein the reinforced fiber substrate (B) exists in a folded state having a plurality of folds with a fold angle of 0° or more and less than 90° in the prepreg.

Prepreg, preform, fiber-reinforced composite material, and method for producing said prepreg, said preform or said fiber-reinforced composite material

The present invention aims at providing a prepreg for producing a laminate suitable as a structural material, and a laminate, which have excellent tensile shear joining strength, fatigue joining strength, and interlaminar fractural toughness values, and can be firmly integrated with another structural member by welding. The present invention is a prepreg including the following structural components [A], [B], and [C], wherein [C] is present on a surface of the prepreg, [C] is a crystalline thermoplastic resin having a glass transition temperature of 100° C. or higher or an amorphous thermoplastic resin having a glass transition temperature of 180° C. or higher, and the reinforcing fibers [A] are present which are included in a resin area including [B] and a resin area including [C] across an interface between the two resin areas: [A] reinforcing fibers; [B] a thermosetting resin; and [C] a thermoplastic resin.

An object of the present invention is to provide a prepreg and a laminate for producing a laminate suitable as a structural material, which have excellent compressive strength and interlaminar fractural toughness values, and can be firmly integrated with another structural member by welding. The present invention provides a prepreg including the following structural components [A] reinforcing fibers, [B] a thermosetting resin, and [C] a thermoplastic resin, in which [B] has a rubbery state elastic modulus of 10 MPa or more at a temperature obtained by adding 50&#xb0; C. to a glass transition temperature in a state in which a degree of cure is 90% or more, [C] is present in a surface of the prepreg, and the reinforcing fibers [A] are present, which are included in a resin area including {B] and a resin area including [C] across an interface between the two resin areas.

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Ehime, Japan

Masato Honma