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. 30, 2007
Filed:
Dec. 06, 2002
Shigeki Yamaguchi, Sodegaura, JP;
Masahiro Kubo, Sodegaura, JP;
Katsumi Uchiyama, Sodegaura, JP;
Akira Funaki, Sodegaura, JP;
Shigeki Yamaguchi, Sodegaura, JP;
Masahiro Kubo, Sodegaura, JP;
Katsumi Uchiyama, Sodegaura, JP;
Akira Funaki, Sodegaura, JP;
Idemitsu Unitech Co., Ltd., Tokyo, JP;
Abstract
An apparatus () for producing a transparent polypropylene sheet, which comprises a sheet formation means () for melt-kneading a resin composition comprising (A) 60 to 97 mass % of a polypropylene resin having an iostactic pentad proportion of 0.85 to 0.99 and a melt index of 2 to 10 g/10 min and (B) 40 to 3 mass % of a polypropylene resin having a racemic pentad proportion [rrrr/(1-mmmm)] of 0.15 to 0.50 and a melt index of 2 to 10 g/10 min and extruding it into s sheet, a first cooling means () for cooling a sheet () into a solid, a preheating means () for re-heating the cooled sheet (), a heat treatment means () for heat-treating the sheet () into a sheet () and a second cooling means () for cooling the sheet () after heat treatment.