Conductive roller, process cartridge and image forming apparatus

摘要

An electroconductive roller capable of exhibiting stable conductivity regardless of environmental change and accompanied with little bleed-out of additives is provided. The conductive roller includes an electroconductive support, an electroconductive elastic layer coating the support and a resistance layer coating the elastic layer; wherein the elastic layer comprises at least one species of rubber selected from the group consisting of acrylonitrile-butadiene rubber, epichlorohydrin rubber and chloroprene rubber, an ether oxygen-containing alkyl phthalate derivative, a quaternary ammonium perchlorate compound and a fatty oil, and the ether oxygen-containing alkyl phthalate derivative, quaternary ammonium perchlorate compound and fatty oil are contained in a total amount of 0.1 - 20 wt. parts per 100 wt. parts of the rubber. The conductive roller is suitably used as a contact charging member in an electrophotographic apparatus.