Abstract: A molding method and a molding system for improving a molding speed of a resin molded member. In the method, firstly a thermoplastic resin composite material is filled in a metal mold (i.e., at time T0), and subsequently a mold-clamping process gets started. As the mold-clamping process progresses, a first decompression circuit starts to decompress an inside of a cavity when the cavity is closed by a sealing member provided on the metal mold. Then, as the mold-clamping process further progresses, the thermoplastic resin composite material thus filled in the metal mold contacts an upper mold of the metal mold (i.e., at time T2). After that, a second decompression circuit starts to decompress the inside of the cavity, thereby to complete the mold-clamping process (i.e., at time T3).

Abstract: To provide a vehicle floor panel having a certain rigidity and being less prone to deformation during manufacturing and deformation when the vehicle floor panel installed in a vehicle is subjected to loads in various directions from outside the vehicle. A vehicle floor panel includes a floor panel main body made of a fiber-reinforced resin, a plurality of recesses 23-1 to 23-7 protruding on one of a lower surface 22 and upper surface of the floor panel main body and depressed on the other of the surfaces and arranged by being spaced apart from one another, and ribs 24-1 to 24-12 connecting two adjacent ones of the recesses on the one of the surfaces of the floor panel main body.

Abstract: A molding method and a molding system for improving a molding speed of a resin molded member. In the method, firstly a thermoplastic resin composite material is filled in a metal mold (i.e., at time T0), and subsequently a mold-clamping process gets started. As the mold-clamping process progresses, a first decompression circuit starts to decompress an inside of a cavity when the cavity is closed by a sealing member provided on the metal mold. Then, as the mold-clamping process further progresses, the thermoplastic resin composite material thus filled in the metal mold contacts an upper mold of the metal mold (i.e., at time T2). After that, a second decompression circuit starts to decompress the inside of the cavity, thereby to complete the mold-clamping process (i.e., at time T3).

Abstract: To provide a vehicle floor panel having a certain rigidity and being less prone to deformation during manufacturing and deformation when the vehicle floor panel installed in a vehicle is subjected to loads in various directions from outside the vehicle. A vehicle floor panel includes a floor panel main body made of a fiber-reinforced resin, a plurality of recesses 23-1 to 23-7 protruding on one of a lower surface 22 and upper surface of the floor panel main body and depressed on the other of the surfaces and arranged by being spaced apart from one another, and ribs 24-1 to 24-12 connecting two adjacent ones of the recesses on the one of the surfaces of the floor panel main body.

Abstract: The present invention provides a prepreg made by impregnating a resin composition into a fiber reinforcing material, the resin composition comprising 50 to 60 parts by weight of an aromatic bismaleimide (A), 30 to 40 parts by weight of an alkenylphenol ether compound (B) expressed by a specific general formula, 5 to 15 parts by weight of an alkenyl aromatic comonomer (C), and 1 to 10% by weight of a thermoplastic resin (D) soluble in (B) or (C) based on the total amount of (A), (B) and (C), the aromatic bismaleimide (A) including 90% by weight or more of bismaleimide diphenylmethane, and a composite material having a glass transition temperature of 260 to 350° C. obtained by heat-curing the prepreg.

Abstract: There are provided a prepreg obtained by impregnating into a fiber reinforcement a resin composition including 40 to 70 parts by weight of an aromatic bismaleimide (A) expressed by a specific general formula, 60 to 30 parts by weight of an alkenylphenol (B) expressed by a specific general formula, 1 to 10% by weight of a polyetherimide (C) of a thermoplastic resin base on the total amount of components (A) and (B), and 15 to 50% by weight of an amorphous polyimide (D) having a glass transition temperature of 200° C. or higher, and a composite material obtained by heating and curing the prepreg. Also provided are the fiber-reinforced prepreg and the composite material without spoiling thermal resistance characteristic of the aromatic bismaleimide resin used as a main component of a resin and having excellent toughness imparted thereto.

Abstract: The present invention provides a prepreg made by impregnating a resin composition into a fiber reinforcing material, the resin composition comprising 50 to 60 parts by weight of an aromatic bismaleimide (A), 30 to 40 parts by weight of an alkenylphenol ether compound (B) expressed by a specific general formula, 5 to 15 parts by weight of an alkenyl aromatic comonomer (C), and 1 to 10% by weight of a thermoplastic resin (D) soluble in (B) or (C) based on the total amount of (A), (B) and (C), the aromatic bismaleimide (A) including 90% by weight or more of bismaleimide diphenylmethane, and a composite material having a glass transition temperature of 260 to 350° C. obtained by heat-curing the prepreg.