Rubber covered roll, rubber composition, and image-forming appar

Details Rubber covered roll, rubber composition, and image-forming appar Rubber covered roll, rubber composition, and image-forming appar

1995-11-21

1998-03-31

Le, H. Thi

Roll or roller

With sheet edge holder

Coating treatment or applicator

399147, 399154, 399176, 428 29, 428492, 492 56, 492 59, G03G 1506, B44F 110, B32B 2504, C08L 7102

Patent

active

057332355

ABSTRACT:
A rubber covered roll of a structure that a rubber layer is formed on the surface of a roll-like base is provided. The rubber layer is a layer formed of a vulcanizate of a rubber composition comprising 25-95 wt. % of copolymer rubber (A) obtained by copolymerizing 28-70 mol % of an alkylene oxide, 28-70 mol % of an epihalohydrin and 2-15 mol % of an ethylenically unsaturated epoxide, and 5-75 wt. % of unsaturated rubber (B). The rubber covered roll does not contaminate any photosensitive member, stably has a low electric resistance, and is low in dependence of electric resistance on environment and in hardness. An image-forming apparatus equipped with the rubber covered roll as a development roll or charging roll, and a rubber composition for the rubber covered roll are also provided.

REFERENCES:
patent: 4530994 (1985-07-01), Shimizu et al.
patent: 4591617 (1986-05-01), Berta
patent: 4689377 (1987-08-01), Aonuma et al.
patent: 4898689 (1990-02-01), Hamada et al.
patent: 4910556 (1990-03-01), Namiki
patent: 4931506 (1990-06-01), Yu
patent: 5241343 (1993-08-01), Nishio
patent: 5556916 (1996-09-01), Matoba et al.

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