Sekisui Chemical Co., Ltd.

Eiji Nagara

Kenji Miyazaki

Tomoyuki Kobayashi

Michiaki Sasayama

Mitsuo Okubo

A sheet-form structure of expandable thermoplastic resin is provided which is capable of undergoing a pseudo-one-dimensional expansion in its thickness direction and which enables manufacture of thermoplastic resin foams having reduced variations in thickness and weight precisions, increased compressive strength, and excellent properties such as surface smoothness. A method of manufacturing the sheet-form structure, as well as such thermoplastic resin foams, are also provided. A sheet-form structureof expandable thermoplastic resin including granulesof expandable thermoplastic resin arranged generally uniformly for integral connection thereof through a thin filmof expandable thermoplastic resin. A thermoplastic resin foam including a continuous, thermoplastic resin foam layer, a number of highly-expanded, thermoplastic resin portions provided on at least one surface of the continuous foam layer, and slightly-expanded, thermoplastic resin thin films for covering outer surfaces of respective highly-expanded portions.

Sheet-form structure of expandable thermoplastic resin, thermoplastic resin foam and methods for manufacturing thereof

A sheet-form structure of expandable thermoplastic resin is provided which is capable of undergoing a pseudo-one-dimensional expansion in its thickness direction and which enables manufacture of thermoplastic resin foams having reduced variations in thickness and weight precisions, increased compressive strength, and excellent properties such as surface smoothness. A method of manufacturing the sheet-form structure, as well as such thermoplastic resin foams, are also provided. A sheet-form structure of expandable thermoplastic resin including granules of expandable thermoplastic resin arranged generally uniformly for integral connection thereof through a thin film of expandable thermoplastic resin. A thermoplastic resin foam including a continuous, thermoplastic resin foam layer, a number of highly-expanded, thermoplastic resin portions provided on at least one surface of the continuous foam layer, and slightly-expanded, thermoplastic resin thin films for covering outer surfaces of respective highly-expanded portions.

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Kyoto, Japan

Eiji Nagara