Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Satoshi Kaji

Tsuneo Takano

Atsushi Kawamura

Takashi Honma

Nobuyuki Yamamoto

Hitoshi Tomobe

Kazuhisa Ikeda

Risa Arai

A main object of the present invention is to provide beneficial improvements relating to a method for producing a fiber reinforced plastic product, the method including curing while pressurizing a prepreg preform by using a core having a fusible part as means for pressurizing. A method for producing a fiber reinforced plastic product, the method including: a core preparation step of preparing a core comprising a fusible part and an outer skin covering the fusible part; a molding step of disposing a prepreg preform inside a mold together with the core, and heating and pressurizing the prepreg preform in the mold to obtain a cured product; and a core removal step of removing materials of the fusible part from the cured product, in the molding step, at least a portion of the prepreg preform being pressurized by expansion of the core, in which the fusible part comprises a first fusible part and a second fusible part having a fusion temperature higher than that of the first fusible part, a material of the first fusible part and a material of the second fusible part are incompatible with each other, and in the molding step, the first fusible part fuses partially or entirely, while the second fusible part does not fuse partially or entirely.

Method for producing fiber reinforced plastic product, and core

A method for producing a fiber reinforced plastic can suppress with which wrinkling or bridging in a convex surface or a concave surface having a large curvature at the same time even if the fiber reinforced plastic has a complicated three-dimensional shape. Such methods for producing a fiber reinforced plastic may involve shaping a prepreg sheet in which continuous fibers are impregnated with a resin material into a three-dimensional shape to produce a fiber reinforced plastic (a); wherein at least a portion of the continuous fibers in an area (X) of the prepreg sheet corresponding to an area (X') in which the fiber reinforced plastic (a) is shear-deformed is bent in an in-plane direction in advance.

Method for manufacturing fiber-reinforced plastic

Provided is a method for manufacturing a fiber reinforced plastic molded body, the method including: performing thermocompression molding, by using a molding die, on a molding precursor which is obtained by arranging a prepreg including a thermosetting resin and a fiber around a thermoplastic solid body.

Method for manufacturing fiber reinforced plastic molded body

This fiber-reinforced resin molded article has: a sheet molding compound layer; a continuous fiber reinforcing material layer; and a harrier layer, wherein the barrier layer is interposed between the sheet molding compound layer and the continuous fiber reinforcing material layer.

Fiber-reinforced resin molded article and method for manufacturing fiber-reinforced resin molded article

A method for producing a flame-proofed fiber by performing a flame-proofing treatment on a carbon-fiber precursor fiber bundle with a heat treatment furnace including a gas supply blowout nozzle, including:

Gas supply blowout nozzle and method of producing flame-proofed fiber and carbon fiber

To perform a flame-resistant treatment on a precursor fiber strand by sending hot air to a heat treatment chamber () through a hot air blowing nozzle () in a direction parallel to a running direction of a precursor fiber strand (). The hot air blowing from the hot air blowing nozzle () passes through a porous plate and a rectifying member that satisfy the following conditions (1) to (4), wherein the conditions are set as follows: (1) A/B&#x2267;4.0; (2) 0.15&#x2266;&#x3b1;&#x2266;0.35; (3) 0&#x2266;B&#x2212;d&#x2266;20; and (4) 80% or more of an area of one opening of the porous plate when causing facing surfaces of the porous plate and the rectifying member to overlap each other is included in one opening of the rectifying member, A indicating a hot air passage distance (mm) of the rectifying member, B indicating a horizontal maximum distance (mm) of one opening of the rectifying member, &#x3b1; indicating a rate of hole area of the porous plate, and d indicating an equivalent diameter (mm) of the porous plate. Accordingly, it is possible to provide a parallel stream type flame-resistant heat treatment furnace having exhibiting the uniform heat transfer performance throughout the inside of the heat treatment chamber by preventing the blockage of the nozzle caused by a silicone compound generated inside the heat treatment chamber even in the hot air blowing nozzle having a simple structure.

Flame-resistant heat treatment furnace

A furnace to flame-resistantly treat a precursor fiber strand by sending hot air to a heat treatment chamber through a hot air blowing nozzle in a direction parallel to a running direction of the strand is provided. The hot air passes through a porous plate and a rectifying member satisfying the following conditions: (1) A/B&#x2267;4.0; (2) 0.15&#x2266;&#x3b1;&#x2266;0.35; (3) 0&#x2266;B&#x2212;d&#x2266;20; and (4) 80% or more of the area of one opening of the porous plate when facing surfaces of the porous plate and the rectifying member overlap is included in one opening of the rectifying member, where A is the rectifying member hot air passage distance (mm), B is a horizontal maximum distance (mm) of one opening of the rectifying member, &#x3b1; is a rate of hole area of the porous plate, and d is the porous plate equivalent diameter (mm).

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Tokyo, Japan

Satoshi Kaji