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. 08, 2010
Filed:
Nov. 28, 2005
Yoichi Matsuura, Takatsuki, JP;
Masanori Takeuchi, Ritto, JP;
Kouji Kataoka, Takatsuki, JP;
Hiroshi Nozawa, Ichihara, JP;
Yoichi Matsuura, Takatsuki, JP;
Masanori Takeuchi, Ritto, JP;
Kouji Kataoka, Takatsuki, JP;
Hiroshi Nozawa, Ichihara, JP;
Abstract
A polypropylene film comprising 70-90 wt. % polymer (a), 2-10 wt. % polymer (b), 2-10 wt. % polymer (c) and 3-20 wt. % polymer (d) and having a haze of 8-30% (wherein the polymer (a) is a block copolymer prepared by producing a polymer part (component a1) by polymerizing in a first step monomers composed mainly of propylene in the absence of an inert solvent and producing an ethylene/propylene copolymer part (component a2) in a second step by polymerization subsequently carried out in a gas phase; the polymer (b) is an ethylene-based polymer having a density of 0.91-0.97 g/cmand a melt flow rate of 5-30 g/10 min; the polymer (c) is an ethylene/α-olefin random copolymer having a density of 0.86-0.90 g/cmand a melt flow rate of 0.3-5 g/10 min; and the polymer (d) comprises two or more propylene-based polymers different in molecular weight from each other).