Sumitomo Rubber Industries Limited

Yoshihiro Yamada

Akihiro Mine

Masashi Hamakubo

Yuta Sakakibara

Toshiyuki Hirai

Yudai Okuno

Naoki Ishida

Hirofumi Konishi

Yuichi Sato

Yuya Meguru

There is provided a rubber composition in which an antistatic agent is uniformly dispersed and the rubber composition has antistatic ability, coefficient of friction, and wear resistance. A rubber composition includes 7 parts by mass or more of a polyether/polyolefin block copolymer resin with respect to 100 parts by mass of a rubber component, and the total amount or a part of a rubber component is mixed with a polyether/polyolefin block copolymer resin at a temperature that is equal to or higher than a melting point of the polyether/polyolefin block copolymer resin.

Antistatic rubber composition

A paper feed roller of the present invention comprises a roller bodyintegrally formed of elastic material in a cylindrical shape in which a plurality of protruding linesare disposed on a peripheral surfaceat even intervals, wherein the roller bodyis formed so that crest portionsand trough portionsare continuously provided in a circumferential direction, an opening angle &#x3b8; is equal to or more than 2&#xb0; and is equal to or less than 8&#xb0;, a radial height h of the protruding line is equal to or more than 0.051 mm and is equal to or less than 0.1 mm, and a curvature radius rat a shoulder is equal to or more than 0.55 mm.

Paper feed roller and image forming apparatus with the paper feed roller

Growing community of inventors

Hyogo, Japan

Yoshihiro Yamada