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. 28, 2003
Filed:
Feb. 12, 2001
Yasuhiro Mochizuki, Chiba, JP;
Yoshitaka Morimoto, Chiba, JP;
Takanori Nakashima, Chiba, JP;
Taketo Hirose, Chiba, JP;
Takayuki Hattori, Chiba, JP;
Sinichi Akitaya, Chiba, JP;
Youichi Kugimiya, Chiba, JP;
Chisso Corporation, Osaka, JP;
Abstract
The present invention relates to a film using a polypropylene composition comprising crystalline polypropylene and a copolymer of propylene with &agr;-olefin in which a limiting viscosity of the said copolymer [&eegr;] is not more than 6.5 dl/g; the ratio of the limiting viscosity of the said polymer [&eegr;] to the limiting viscosity of the said crystalline polypropylene [&eegr;] is from 0.6 to 1.2; and the product i.e. ([&eegr;] /[&eegr;] )×(W /W ), of the ratio of the limiting viscosity of the copolymer to the crystalline polypropylene with the ratio by weight of them is within a range of from 0.2 to 4.5 and also relates to a multi-layered film having at least one layer of the said film.