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. 11, 2001
Filed:
Nov. 08, 1999
Mamoru Takahashi, Yamaguchi, JP;
Takashi Nakagawa, Yamaguchi, JP;
Kenji Sugimura, Yamaguchi, JP;
Ken Yoshitsugu, Yamaguchi, JP;
Mitsui Chemical INC, Tokyo, JP;
Abstract
The present invention is intended to obtain an ethylene copolymer composition having excellent transparency, mechanical strength and moldability. The ethylene copolymer composition comprises an ethylene/&agr;-olefin copolymer and high-pressure radical process low-density polyethylene. The ethylene/&agr;-olefin copolymer is a copolymer of ethylene and an &agr;-olefin of 6 to 8 carbon atoms and has the following properties: the melt tension (MT) and the melt flow rate (MFR) satisfy the relation 9.0×MFR,>MT>2.2×MFR,; the activation energy ((E,)×10,J/molK) of flow, the carbon atom number (C) of the &agr;-olefin in the copolymer and the &agr;-olefin content (x mol %) in the copolymer satisfy the relation (0.039Ln(C−2)+0.0096)×x+2.87<Ea×10,≦(0.039Ln(C−2)+0.1660)×x+2.87; and the haze of an inflation film produced from said copolymer satisfies a specific relation. This ethylene copolymer composition can be used for producing molded products such as films, sheets, packaging materials, injection molded products, expansion molded products and fibers. These molded products are excellent in mechanical strength, heat resistance or transparency.