Toyota Jidosha Kabushiki Kaisha

Sekisui Kagaku Kogyo Kabushiki Kaisha

Fumimasa Kuno

Hideo Nishimura

Rikizou Tanaka

Yutaka Yoshino

Hiroshi Harayama

Satoshi Ohmura

A laminated structure comprising a laminated foamed sheet material composed of two cured foamed sheets each comprising a propylene-type polymer and an ethylene-type polymer and being laminated to each other through a substantially non-foamed or lowly foamed heat-fused layer, and non-foamed surface skin layers composed of a propylene-type polymer and laminated respectively to both surfaces of said laminated foamed sheet material, the ratio of the thickness Ts of each of said surface skin layer to the solid thickness Tf of each of the cured foamed sheets, Ts/Tf, being from 1 to 50, the thickness T1 of the heat-fused layer being 0.1 to 0.5 mm, and the thickness T1 being 1 to 25% of the thickness of each of the cured foamed sheets. The laminated structure can be produced by extrusion-laminating a non-foamed surface skin layer of a propylene-type polymer to one surface of each of two cured foamed sheets each comprising a propylene-type polymer and an ethylene-type polymer to thereby form two laminates, placing the two laminates such that the surfaces of the cured foamed sheets face each other, and melting and bonding the facing two surfaces to form a substantially non-foamed or lowly foamed heat-fused layer between the laminates.

Growing community of inventors

Hasuda, Japan

Fumimasa Kuno