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:
Dec. 10, 2002
Filed:
Dec. 19, 2000
Toshiaki Egashira, Kawasaki, JP;
Reiji Higuchi, Kawasaki, JP;
Kazuyuki Sakamoto, Kawasaki, JP;
Kimiya Miyoshi, Kawasaki, JP;
Masahiro Wakayama, Kawasaki, JP;
Tatsuo Yamaguchi, Kawasaki, JP;
Fumio Asada, Kawasaki, JP;
Sinji Miwa, Kawasaki, JP;
Kenichi Hiraki, Kawasaki, JP;
Masaaki Ikeda, Kawasaki, JP;
Yoshimi Shimizu, Kawasaki, JP;
Japan Polyolefins Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to an ethylene-&agr;-olefin copolymer; a composition thereof; a film thereof; a polar group-containing resin material; and productions and use of the ethylene-&agr;-olefin copolymer. The ethylene-&agr;-olefin copolymer of the present invention is characterized in satisfying the following conditions (A) to (E): (A) a density in the range of 0.92 to 0.96 g/cm ; (B) a melt flow rate (MFR) in the range of 0.01 to 200 g/10 min; (C) a molecular weight distribution (Mw/Mn) in the range of 1.5 to 5.0; (D) possessing only one peak in terms of the number of peaks observed in an elution temperature-eluted amount curve as measured by the continuous temperature raising elution fractionation (TREF) method, from the integrated elution curve obtained by the elution temperature-eluted amount curve, the difference T −T in the temperature and density d respectively satisfy a specific relationship, wherein T is the temperature where 25% of the total elution is obtained, and T is the temperature where 75% of the total elution is obtained; and (E) possessing one or two melting point peaks, and among these the highest melting point T and the density d satisfy a specific relationship. Accordingly, this ethylene-&agr;-olefin copolymer exhibits a superior thermal resistance, heat sealability, and processability.