Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Tsuneo Igarashi

Takashi Fujiwara

Goro Furumoto

Mitsuo Kohno

Hisaharu Takeuchi

Hiroyuki Mizuki

Minoru Nomura

Lining cloth and method for producing the same

The present invention relates to a novel composite material, that is, a prepreg, obtained by bonding a film (1) comprised of an organic polymer having substantially no melting point and having a high modulus of 700 kg/mm.sup.3 or more and a high strength of 35 kg/mm.sup.2 or more and a resin layer (2) and/or fiber-reinforced layer (3), a composite molded body, and a method of manufacturing a composite molded body. The composite molded body obtained by bonding the film (1) and the resin layer (2) of the present invention has superior strength, excellent pliability, and large toughness in all directions. Further, the composite molded body obtained by bonding the film (1) and the fiber-reinforced resin layer (3) has both an extremely large impact resistance which could never be obtained with conventional molded bodies and also a strength and modulus greater than in the past. The molded body can be suitably used for aerospace equipment, sports goods, leisure goods, etc. making use of its light weight, corrosion resistance, and other properties in addition to the above superior proportion.

Prepreg, composite molded body and method of manufacture of the

The present invention relates to a novel composite material, that is, a prepreg, obtained by bonding a film (1) comprised of an organic polymer having substantially no melting point and having a high modulus of 700 kg/mm.sup.2 or more and a high strength of 35 kg/mm.sup.2 or more and a resin layer (2) and/or fiber-reinforced layer (3), a composite molded body, a method of manufacturing a composite molded body. The composite molded body obtained by bonding the film (1) and the resin layer (2) of the present invention has superior strength, excellent pliability, and large toughness in all directions. Further, the composite molded body obtained by bonding the film (1) and the fiber-reinforced resin layer (3) has both an extremely large impact resistance which could never be obtained with conventional molded bodies and also a strength and modulus greater than in the past. The molded body can be suitably used for aerospace equipment, sports goods, leisure goods, etc. making use of its light weight, corrosion resistance, and other properties in addition to the, above superior properties.

Prepreg, composite molding body, and method of manufacture of the

Films having good dimensional stability and practically no tendency of fibrillation and also other superior mechanical properties can be obtained easily and at a high production speed by stretching a layer of a substantially amorphous polymer consisting mainly of polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate at a temperature in the range from Tg to 100.degree.C (wherein Tg is a glass transition point) in the longitudinal direction to 1.5 to 3 times the original length and further stretching the resulting film at a high temperature of 150.degree.C or higher and a high stretching velocity 40000% per minute or higher in the longitudinal direction to give a total stretching ratio of 3.1 times or more.

Polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate uniaxially stretched

Growing community of inventors

Moriyama, Japan

Tsuneo Igarashi