Tokai Rubber Industries, Ltd.

Yousuke Hayashi

Satoshi Suzuki

Akihiko Kaji

Masanari Umeda

Tsukasa Fujita

Keisuke Tokoro

Shuichi Egawa

Shigeki Kanda

A development roll for electrophotographic equipment includes a shaft body, a rubber elastic layer formed by molding on an outer circumference of the shaft body and having many convex portions formed by transfer molding on the outer circumferential surface thereof, and a coating layer disposed on an outer circumference of the rubber elastic layer. The coating layer is composed of a cured body of a coating material containing (A) a thermoplastic urethane having a number-average molecular weight in the range of 50,000 to 200,000, (B) a polyol having a number-average molecular weight in the range of 500 to 4,000, and (C) a curing agent. The mass percentages a, b, and c of the components (A), (B), and (C) satisfy the following expressions: a+b+c=100, 40&#x2266;a&#x2266;75, 5&#x2266;b&#x2266;20, and 20&#x2266;c.

Development roll for electrophotographic equipment

An endless belt for use as an intermediate transfer belt or a transfer-sheet transfer belt in an electrophotographic apparatus using electrophotographic technologies such as a full-color LBP (Laser Beam Printer) or a full-color PPC (Plane Paper Copier). At least a base layer of the belt comprises a modified polyamide imide resin formed by copolymerizing: (A) an aromatic isocyanate compound; (B) an aromatic polycarboxylic acid anhydride; and (C) a polymer having carboxylic acids at both terminals thereof.

Endless belt for electrophotographic apparatus

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Kasugai, Japan

Yousuke Hayashi