Tokai Rubber Industries, Ltd.

Hirofumi Okuda

Satoshi Suzuki

Akihiko Kaji

Hiroki Sugiura

Hiroyasu Kato

Hiroshige Hiramatsu

Motoharu Ishihara

Yasuki Ohtake

Yuichiro Maruyama

An inexpensive electrically conductive roll which is easily produced compared with conventional rolls, offers stable adhesion at the interface with time lapse after mixing adhesive components, which is not affected by environment during storage of the core after being applied with an adhesive. The electrically conductive roll comprises a shaft, an adhesive layerformed on an outer periphery of the shaft and a base rubber layerformed on an outer periphery of the adhesive layer, wherein the base rubber layer includes an addition reaction curing silicone elastomer and the adhesive layer includes a one part epoxy adhesive.

Electrically conductive roll

A semi-conductive roll is provided including a shaft, a low-hardness base layer formed on an outer circumferential surface of the shaft, and a coating layer formed by coating the low-hardness base layer radially outwardly. The coating layer includes one of a rubber material and an elastomer material that is crosslinked by at least one resin crosslinking agent.

Semi-conductive roll

A charging roll which is held in rolling contact with a photosensitive drum for charging the photosensitive drum. The charging roll includes an outermost layer formed of a resin composition containing a grafted carbon as an electrically conductive agent. The grafted carbon includes a carbon black and a polymer which is grafted on the carbon black so as to cover a surface of the carbon black.

Charging roll whose outermost layer contains grafted carbon

Growing community of inventors

Niwa-gun, Japan

Hirofumi Okuda