Conductive roller and manufacturing method therefor
AssigneeBridgestone Corporation
InventorsJunichi Takano, Izumi Yoshimura
Life of this patent
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Abstract
Provided is a conductive roller including a shaft 1, and an elastic layer 2 and a surface layer 3 formed on the periphery of the shaft in the order mentioned. The elastic layer 2 is 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 2, 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 layer 2 are made fine, whereby the surface properties of the roller improve. Also provided is a method of manufacturing the above-mentioned conductive roller.
Claims4
A conductive roller comprising a shaft, an elastic layer on the periphery of the shaft, and a surface layer on the elastic layer on the periphery of the shaft, wherein
- the elastic layer is composed of a polyurethane foam containing a polyurethane resin and a waterproofing agent,
- the waterproofing agent is ammonium zirconium carbonate, and
- the polyurethane foam is formed by foaming materials comprising the polyurethane resin and the ammonium zirconium carbonate.
A manufacturing method of a conductive roller, comprising:
- providing a shaft,
- providing an elastic layer on a periphery of the shaft, and
- providing a surface layer on the elastic layer on the periphery of the shaft,
- wherein the elastic layer is composed of a polyurethane foam formed by foaming materials comprising a polyurethane resin and a waterproofing agent,
- wherein the waterproofing agent is ammonium zirconium carbonate, and
- wherein the method further comprises:
- foaming materials comprising the polyurethane resin and the ammonium zirconium carbonate to form foamed materials, and
- applying the foamed materials to the shaft by dipping coating to form the elastic layer on the periphery of the shaft.
Dependencies are inferred from the claim text.