Patent ID: 8090295

Claim:
A conductive rubber member having a conductive elastic layer made of a rubber material that consists of at least one selected from the group consisting of polyurethane, styrene rubber, acrylic rubber, ethylene-propylene rubber, and silicone rubber and which has been imparted with conductivity by means of a conductivity-imparting agent, wherein the conductive elastic layer has, at a surface portion thereof, a surface-treated layer which has been formed by impregnating the surface with a surface-treatment liquid containing an isocyanate component and at least one of an ion-conducting polymer which is selected from the group consisting of acrylonitrile-butadiene rubber, epichlorohydrin rubber, ethylene oxide homopolymer, ethylene oxide-propylene oxide copolymer, ethylene oxide-allyl glycidyl ether copolymer, and ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer.