Abstract: 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.

Abstract: The present invention provides an improvement relating to a method for producing a fiber-reinforced resin article at least partially having a structure comprising a bent or curved wall surface, such as a hollow structure part or a U-shaped cross-sectional structure part. A method for manufacturing a fiber-reinforced resin article according to the present invention has a molding step of heating, in a press metal mold, a prepreg preform together with a core comprising a wax material to obtain a cured product and a core removal step of removing the core from the cured product, where the core has an expansion part comprising a first wax material and a stamper part comprising a second wax material that is incompatible with the first wax material, the stamper part is disposed on a surface of the core, and a portion mirroring a shape of a surface of the stamper part is formed on a surface of the cured product.

Abstract: The present invention provides a beneficial improvement relating to a method for producing a fiber-reinforced resin article at least partially having a hollow structure part. A method for a producing fiber-reinforced resin article according to the present invention includes a molding step of disposing, in a press mold, a prepreg preform including a core-containing part in which a fusible core comprising a wax material is disposed in an inner side, and heating the disposed prepreg preform to obtain a cured product having a hollow structure part and a core removal step of removing the fusible core from the cured product. In the prepreg preform, a through hole is formed in the core-containing part, and an elastomer stopper is inserted into the through hole.

Abstract: 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.

Abstract: The purpose of the present disclosure is to enhance the degree of freedom for settlement, even once the settlement method has been selected by the user.

Abstract: Provided is a method of manufacturing a FRP product that is obtained by integrally curing a prepreg where fibers are arranged in a specific direction, such as a unidirectional prepreg, a cloth prepreg, or a tow prepreg and a chopped fiber prepreg, such as a sheet molding compound, in which disorder of fiber arrangement in a portion obtained by curing the prepreg is suppressed to obtain an expected strength.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method of determining whether or how to present a loan offer to a user includes determining, by at least one processor, whether or how to present a loan offer to a user on the basis of the user's financial demand.

Abstract: 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: a nozzle body including an inclined plate that guides a gas flowing straightly from a gas inlet port to a rectification board; and the rectification board which rectifies the flow of the gas to blow out toward a yarn from a gas outlet port, where a gas introduction direction in the nozzle is different from a gas blowing out direction, a gas guiding zone is between the inclined plate and the rectification board and includes a guide plate in a space between the gas inlet port and the rectification board and divides the gas supplied from the inlet port into two or more streams, and at least one of between the inclined plate and the guide plate or between the guide plates, an upstream passage width W1 perpendicular to a gas flowing direction inside the gas passage and any downstream passage width W2 satisfy

Abstract: Provided is a method for producing a fiber reinforced plastic with which the occurrence of wrinkling or bridging in a convex surface or a concave surface having a large curvature can be suppressed at the same time even if the fiber reinforced plastic has a complicated three-dimensional shape, the method for producing a fiber reinforced plastic, including a step of 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 sheared and deformed is bent in an in-plane direction in advance.

Abstract: 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.

Abstract: 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.

Abstract: To perform a flame-resistant treatment on a precursor fiber strand by sending hot air to a heat treatment chamber (2) through a hot air blowing nozzle (4) in a direction parallel to a running direction of a precursor fiber strand (10). The hot air blowing from the hot air blowing nozzle (4) 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?4.0; (2) 0.15???0.35; (3) 0?B?d?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, ? indicating a rate of hole area of the porous plate, and d indicating an equivalent diameter (mm) of the porous plate.

Abstract: The nozzle body of the gas supply blowout nozzle (11) includes an inclined plate (13) guiding a gas flowing straightly from a gas inlet port to a rectification board (12), which is connected with the nozzle body. The rectification board (12) rectifies the flow of the gas guided by the inclined plate (13) so that the gas blows out perpendicular or parallel to a yarn from a gas outlet port. A gas guiding zone formed between the inclined plate (13) and the rectification board (12) includes one or more guide plates (14) which divide the gas supplied from the gas inlet port (11a) of the gas supply blowout nozzle (11) into two or more streams. In each gas passage formed at least one of between the inclined plate (13) and the guide plate (14) or between the guide plates (14), an upstream passage width W1 and any downstream passage width W2 thereof satisfy the relation of W1?W2.

Abstract: To perform a flame-resistant treatment on a precursor fiber strand by sending hot air to a heat treatment chamber (2) through a hot air blowing nozzle (4) in a direction parallel to a running direction of a precursor fiber strand (10). The hot air blowing from the hot air blowing nozzle (4) 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?4.0; (2) 0.15???0.35; (3) 0?B?d?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, ? indicating a rate of hole area of the porous plate, and d indicating an equivalent diameter (mm) of the porous plate.

Abstract: 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?4.0; (2) 0.15???0.35; (3) 0?B?d?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, ? is a rate of hole area of the porous plate, and d is the porous plate equivalent diameter (mm).

Abstract: The present invention relates to a heating furnace suitable for a step in which a precursor fiber bundle is flameproofed. The heating furnace is provided with a hot air introduction duct disposed in a horizontal space and a heat treating chamber, and in the hot air introduction duct outside the heat treatment chamber, a heating device and a circulation fan for the hot air. The interior of the heat treatment chamber comprises a fiber travel path in which the fiber bundles each having a sheet shape horizontally travels the hot air flowing in a low-temperature region is directed to the high-temperature region side by an air direction change plate to be narrowed and flow in the width direction of the hot air introduction duct As a result, the temperature distribution in the width direction in the treatment chamber can be improved.

Abstract: 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) AB?4.0; (2) 0.15???0.35; (3) 0?B?d?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, ? is a rate of hole area of the porous plate, and d is the porous plate equivalent diameter (mm).