Bridgestone Corporation

Izumi Yoshimura

Junichi Takano

Hirotaka Tagawa

Daijirou Sirakura

A conductive roller in which dripping of a water-based coating during the manufacture thereof is restrained, and a manufacturing method thereof. The conductive roller includes a shaft, at least one elastic layer formed on the outer periphery of the shaft and a surface layer formed on the outer peripheral surface of the elastic layer. The elastic layer is formed by using a coating for elastic layers containing a liquid absorbing agent, and the surface layer is formed by using a coating for surface layers. The method comprises forming an elastic layer by applying a coating for elastic layers containing a liquid absorbing agent on the outer periphery of the shaft and drying to form the elastic layer; and forming a surface layer by, after forming the elastic layer, applying a coating for surface layers on the formed elastic layer and drying to form the surface layer.

Conductive roller and manufacturing method thereof

Provided is a conductive roller including a shaft, and an elastic layerand a surface layerformed on the periphery of the shaft in the order mentioned. The elastic layeris composed of a polyurethane foam containing a polyurethane resin and a waterproofing agent. By containing the waterproofing agent in the formulation of the polyurethane foam constituting the elastic layer, the environment-dependence of the roller resistance is improved, the resistance variance accompanied by change in the environment can be controlled, and pores formed on the surface of the elastic layerare made fine, whereby the surface properties of the roller improve. Also provided is a method of manufacturing the above-mentioned conductive roller.

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Yokohama, Japan

Izumi Yoshimura