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:
Jun. 24, 2008
Filed:
Oct. 18, 2004
Takao Tayano, Mie, JP;
Kuninori Takahashi, Mie, JP;
Iku Kouzai, Mie, JP;
Shinichi Kitade, Mie, JP;
Shigeo Mizukami, Mie, JP;
Koichi Hirayama, Mie, JP;
Takao Tayano, Mie, JP;
Kuninori Takahashi, Mie, JP;
Iku Kouzai, Mie, JP;
Shinichi Kitade, Mie, JP;
Shigeo Mizukami, Mie, JP;
Koichi Hirayama, Mie, JP;
Japan Polypropylene Corporation, Tokyo, JP;
Abstract
A polyolefin based biaxially oriented multi-layer film having at least one surface layer comprise of the propylene-ethylene random block copolymer; The propylene-ethylene random block copolymer obtained through sequential polymerization catalyzed by a metallocene component which is composed of 30 to 70 wt % of a propylene-ethylene random copolymer component having an ethylene content of 1 to 7 wt % produced in the first step of the polymerization and from 70 to 30 wt % of a low crystallinity or an amorphous propylene-ethylene random copolymer component produced in the second step of the polymerization having an ethylene content of 6 to 15 wt % higher than that of the polymer component obtained in the first step, wherein that shows a single peak at 0° C. or lower in the temperature-loss tangent (tan δ) curve obtained by dynamic mechanical analysis (DMA).