Sumitomo Chemical Company, Limited

Makoto Nagata

Masahito Matsumoto

Yoshiaki Togawa

Toru Yabe

Koichi Yanase

Hiroaki Takahata

Takashi Fujimoto

Masaaki Tsutsubuchi

Tohru Yabe

Tsuyoshi Moriguchi

Disclosed is a method for manufacturing an injection-molded foamed article, the method comprising the steps of:

Method for manufacturing injection-molded foamed article

Molded article and process for producing same

Laminated film or sheet process for producing same and laminated structure formed using same

Film, laminated film and laminated structure

An impact energy absorptive structures is made of usual plastic materials suitable for molding processing, and is designed to suit different degrees of impact loading anticipated in various applications. The impact energy absorptive structures is composed of a base member 11 and protruding rib members including long and short members, in which the proportion of the cross sectional area of the long rib members is between 0.3 to 0.8 of the total cross sectional area of the rib members. Other design modifications can be made readily to customize the impact resistance of the impact energy absorptive structures.

Impact energy absorptive structures

An impact energy absorptive structure is made of usual plastic materials suitable for molding processing, and is designed to suit different degrees of impact loading anticipated in various applications. The impact energy absorptive structure is composed of a base member 11 and protruding rib members including long and short members, in which the proportion of the cross sectional area of the long rib members is between 0.3 to 0.8 of the total cross sectional area of the rib members. Other design modifications can be made readily to customize the impact resistance of the impact energy absorptive structures.

A plastic-made reinforced structure comprising a thermoplastic resin-made plate and cylindrical hollow rib(s) made of the same resin as that of said plate, connected to at least one side of said plate perpendicularly to the side so that the plate and the rib(s) form one piece, in which structure the following relationships hold:

Plastic-made reinforced structure

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Ichihara, Japan

Makoto Nagata