The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1988
Filed:
Jan. 28, 1987
Hiroshi Harayama, Kusatsu, JP;
Hideo Nishimura, Toyota, JP;
Satoshi Ohmura, Toyota, JP;
Yutaka Yoshino, Ohtsu, JP;
Rikizou Tanaka, Ohtsu, JP;
Fumimasa Kuno, Hasuda, JP;
Sekisui Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
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.