Sheet-form structure of expandable thermoplastic resin,...

Details Sheet-form structure of expandable thermoplastic resin,... Sheet-form structure of expandable thermoplastic resin,...

2006-05-23

2006-05-23

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

C264S046200, C264S046300, C264S054000, C264S321000

Reexamination Certificate

active

07048879

ABSTRACT:
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 structure1of expandable thermoplastic resin including granules2of expandable thermoplastic resin arranged generally uniformly for integral connection thereof through a thin film3of 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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