Nippon Petrochemicals Company, Limited

Nippon Oil Company

Nippon Hodo Co., Ltd.

Sumio Ikeda

Kunimichi Kubo

Katuaki Ishikawa

Yutaka Watanabe

Narumi Ishikawa

Noboru Ikegami

Toshifumi Morimoto

Toshiyuki Miyauchi

Kazuo Aoyama

Yoshiteru Kato

Hisanobu Niwata

A cushion or trackbed material for use in a riding-ground is obtained by coating sand with a carboxyl-containing olefin polymer and an oxygen-containing wax.

Cushion or trackbed material for use in riding-ground

A polyethylene composition which has a wide molecular weight distribution and excellent balance among melt elasticity, flow characteristics and mechanical properties, and which is suitable for use in producing large-scaled hollow plastics articles. The composition comprises a higher molecular weight ethylene polymer or copolymer and a lower molecular weight ethylene polymer or copolymer which is specified in view of the content of o-dichlorobenzene and the ratio of the area under the elution temperature-eluate volume curve between 25.degree.to 90.degree. C. to the area under said curve of 90.degree. C. and above in temperature rising elution fractionation.

Polyethylene composition

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Yokohama, Japan

Sumio Ikeda