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:
May. 13, 2003
Filed:
Apr. 27, 2000
Yutaka Minami, Ichihara, JP;
Yasuhiro Mogi, Ichihara, JP;
Takuji Okamoto, Ichihara, JP;
Tsuyoshi Ota, Ichihara, JP;
Hideo Funabashi, Ichihara, JP;
Yasushi Seta, Ichihara, JP;
Idemistsu Petrochemical Co., Ltd., Tokyo, JP;
Abstract
A propylene homopolymer or a copolymer of propylene and an &agr;-olefin with at least 4 carbon atoms, which is produced through polymerization in the presence of a metallocene catalyst and which has an increased isotactic pentad fraction and a reduced molecular weight distribution; and also a propylene-based polymer composition as prepared by adding a nucleating agent to the homopolymer or the copolymer are superior to conventional polymers and polymer compositions, as they have well-balanced toughness and heat-sealability, and are not sticky, and, in addition, they have excellent anti-blocking properties. Their films especially those for wrapping and packaging edibles are tough and have excellent anti-blocking properties, and high film impact resistance. The polymer and the polymer composition have good moldability.