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:
Oct. 18, 2011
Filed:
Sep. 28, 2006
Yuki Iseki, Scarsdale, NY (US);
Katsuhiro Yamada, Ichihara, JP;
Yasutoyo Kawashima, Ichihara, JP;
Yoshinobu Nozue, Ichihara, JP;
Yuki Iseki, Scarsdale, NY (US);
Katsuhiro Yamada, Ichihara, JP;
Yasutoyo Kawashima, Ichihara, JP;
Yoshinobu Nozue, Ichihara, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
An ethylene-α-olefin copolymer having monomer units derived from ethylene and monomer units derived from an α-olefin of 3 to 20 carbon atoms, a melt flow rate (MFR) of 0.01 to 4 g/10 minutes, a density of 890 to 970 kg/m, an activation energy of flow of 50 kJ/mol or more and a molecular weight distribution measured by gel permeation chromatography of 3 or more, wherein a characteristic relaxation time (τ) determined by a melt viscoelasticity measurement or an external haze ratio (EHR) satisfies a relationship of the following formula (1) or (2), respectively:3×MFR+1.1>τ>1.3×MFR+1.4  (1)EHR≦−15×log MFR+0.145×−47  (2)