Nippon Petrochemicals Company, Limited

Japan Polyethylene Corporation

Hirofumi Nishibu

Kunimichi Kubo

Takaaki Hattori

Toshifumi Morimoto

Noboru Ikegami

Toshiyuki Miyauchi

Yoshito Sasaki

Tetsuya Yoshikiyo

Shigeki Saito

A polyethylene composition which has excellent flow characteristics and mechanical properties, especially low temperature mechanical properties as well as thermal stability, elasticity and workability for molding. The polyethylene composition comprises 20 to 80 wt. % of an ethylene-.alpha.-olefin copolymer of higher molecular weight having (a) intrinsic viscosity (.eta..sub.1) of 1.2 to 9.0 dl/g, (b) density (d.sub.1) of 0.890 to 0.935 g/cm.sup.3 (c) a specific areal ratio calculated with an elution temperature-eluate volume curve in elution fractionation, and (d) a specific quantity of the content which is soluble in 25.degree. C. o-dichlorobenzene, and 80 to 20 wt. % of ethylene homopolymer or ethylene-.alpha.-olefin copolymer of lower molecular weight having (e) intrinsic viscosity (.eta..sub.2) of 0.2 to 1.6 dl/g, (f) density (d.sub.2) of 0.890 to 0.980 g/cm.sup.3 and, wherein the above (.eta..sub.1) is larger than (.eta..sub.2), and the prepared composition has an intrinsic viscosity (.eta.) of 0.77 to 5.2 dl/g, a density (d) of 0.890 to 0.950 g/cm.sup.3 and a specific N-value of 1.7 to 3.5.

Polyethylene composition

Growing community of inventors

Yokohama, Japan

Hirofumi Nishibu