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. 01, 2003
Filed:
Mar. 31, 2000
Yoshihiko Sasaki, Mie, JP;
Kazutoshi Takenaka, Mie, JP;
Japan Polychem Corporation, Tokyo, JP;
Abstract
A multi-layer film contains at least a first layer, a second layer inside thereof, and a third layer inside the second layer. The first layer contains a polypropylene resin (PP). The second layer contains a polyethylene resin (PE) having 70 to 90 wt% of a lower crystalline component (LCC) and 10 to 30 wt% of a higher crystalline component (HCC). The PE has a melt flow rate of 0.1 to 20 g/10 min and in a temperature rising elution fraction elution curve, an elution peak temperature of the LCC is from 45 to 85° C; the ratio of (peak height of LCC)/(height of the minimum valley between LCC peak and HCC peak) is 9 or more; an area ratio of the elution peak temperature or less of LCC is 35% or more. The third layer contains a) PP or b) a high-pressure low density PE having an extrapolation melting completion temperature of melting of 110° C or more; or c) a copolymer of ethylene/C &agr;-olefin having a density of 0.920 g/cm or more.