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:
Sep. 17, 2013
Filed:
Jul. 18, 2006
Diasuke Imanari, Tochigi-ken, JP;
Kenichi Takase, Utsunomiya, JP;
Masayasu Okuda, Kanuma, JP;
Masato Naito, Kanuma, JP;
Diasuke Imanari, Tochigi-ken, JP;
Kenichi Takase, Utsunomiya, JP;
Masayasu Okuda, Kanuma, JP;
Masato Naito, Kanuma, JP;
JSP Corporation, , JP;
Abstract
A method for producing a hollow foam molding having a thin and uniform wall thickness, including extruding a foamable melt containing a polypropylene resin having an equilibrium compliance Jof 0.5×10to 1.8×10Paand a swell ratio Sof 2.5 or less and a physical blowing agent through a die to obtain a parison having a softened polypropylene resin foam layer, placing the parison in a mold, and blowing a gas into the parison to obtain a hollow foam molding having a hardened polypropylene resin foam layer with an apparent density of 0.35 to 0.65 g/cm.