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:
Jul. 17, 2007
Filed:
Apr. 18, 2005
Naochika Kogure, Utsunomiya, JP;
Teruyuki Akiyama, Utsunomiya, JP;
Noritoshi Nishiyama, Utsunomiya, JP;
Naochika Kogure, Utsunomiya, JP;
Teruyuki Akiyama, Utsunomiya, JP;
Noritoshi Nishiyama, Utsunomiya, JP;
JSP Corporation, Tokyo, JP;
Abstract
A process for an extruded resin foam, comprising extruding a foamable composition comprising a melted polystyrene resin and a physical blowing agent through a die to obtain a polystyrene resin foam having a thickness of at least 10 mm and a transverse cross-sectional area of at least 50 cm, wherein said extrusion is performed so that the ratio Mz/Mn of a Z average molecular weight Mz of the polystyrene resin foam to a number average molecular weight Mn of the polystyrene resin foam, each measured by gel permeation chromatography, is 8.0 or more.