Abstract:
The phenolic resin composition for fiber-reinforced composite materials of the invention comprises at least the following constituent elements A and B of a thermoplastic resin: A: phenolic resin, B: at least one thermoplastic resin selected from polyvinyl formals, polyvinyl acetals, polyvinyl butyrals, polyvinyl pyrrolidones, polyvinyl acetates, polyvinyl alcohols, polyethylene glycols, copolymerized nylons and dimer acid polyamides. The resin composition is filmwise applied to reinforcing fibers, and the resulting film is heated under pressure whereby it is impregnated into the reinforcing fibers to give a prepreg for fiber-reinforced composite materials.
Abstract:
The phenolic resin composition for fiber-reinforced composite materials of the invention comprises at least the following constituent elements A and B of a thermoplastic resin: A: phenolic resin, B: at least one thermoplastic resin selected from polyvinyl formals, polyvinyl acetals, polyvinyl butyrals, polyvinyl pyrrolidones, polyvinyl acetates, polyvinyl alcohols, polyethylene glycols, copolymerized nylons and dimer acid polyamides. The resin composition is filmwise applied to reinforcing fibers, and the resulting film is heated under pressure whereby it is impregnated into the reinforcing fibers to give a prepreg for fiber-reinforced composite materials.
Abstract:
A prepreg consisting of the following constituent elements: (A), (B) and (C), and the constituent element (C) is distributed in the portion of the prepreg which is close to a superficial layer of one or both surfaces thereof, the constituent element (C) not having regular arrangement (A) reinforced fibers consisting of long fibers; (B) matrix resin; (C) long fibers of a thermoplastic resin. The prepreg according to the present invention gives a composite material retaining its tacking characteristics and draping characteristics and its thermal resistance when it is hot formed, and having excellent impact resistance and inter-layer tenacity. This prepreg is manufactured easily, and has a high degree of freedom as a material.
Abstract:
Un preimpregnado formado por impregnación de fibras de refuerzo orientadas unidireccionalmente con una composición de resina epoxi que contiene de 50 a 95 partes por peso de resina epoxi disfuncional [B] por 100 partes por peso de la resina epoxi total, y cuya resina epoxi disfuncional [B] incluye una o más resinas epoxi tipo bifenilo, resinas epoxi tipo naftaleno, resinas epoxi tipo diciclopentadieno, y resinas epoxi tipo difenilfluoreno, donde la temperatura de transición vítrea Tg del material curado, obtenido por calentamiento de la composición de resina epoxi durante 2 horas a 180ºC es como mínimo de 150ºC, y el módulo de rigidez G''R en la meseta o "plateau" viscosa a la temperatura superior a la citada Tg no es superior a 10 MPa.
Abstract:
A prepreg consisting of the following constituent elements: (A), (B) and (C), and the constituent element (C) is distributed in the portion of the prepreg which is close to a superficial layer of one or both surfaces thereof, the constituent element (C) not having regular arrangement (A) reinforced fibers consisting of long fibers; (B) matrix resin; (C) long fibers of a thermoplastic resin. The prepreg according to the present invention gives a composite material retaining its tacking characteristics and draping characteristics and its thermal resistance when it is hot formed, and having excellent impact resistance and inter-layer tenacity. This prepreg is manufactured easily, and has a high degree of freedom as a material.
Abstract:
A prepreg consisting of the following constituent elements: (A), (B) and (C), and the constituent element (C) is distributed in the portion of the prepreg which is close to a superficial layer of one or both surfaces thereof, the constituent element (C) not having regular arrangement (A) reinforced fibers consisting of long fibers; (B) matrix resin; (C) long fibers of a thermoplastic resin. The prepreg according to the present invention gives a composite material retaining its tacking characteristics and draping characteristics and its thermal resistance when it is hot formed, and having excellent impact resistance and inter-layer tenacity. This prepreg is manufactured easily, and has a high degree of freedom as a material.
Abstract:
A phenolic resin composition for fiber-reinforced composite material, comprising at least the following constituent A and thermoplastic resin B. A : phenolic resin, and B : at least one thermoplastic resin selected from among polyvinyl formal, polyvinyl acetal, polyvinyl butyral, polyvinylpyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyethylene glycol, copolymer nylon, and dimer acid polyamide. A prepreg for fiber-reinforced composite material is produced by coating a film with the resin composition and impregnating the film with reinforcing fibers under heat and pressure.