Abstract: To provide a conductive rubber member which exhibits small variation in electrical resistance and a stable electrical resistance for a long period of time. The conductive rubber member include a conductive elastic layer formed of a rubber material which has been imparted with electrical conductivity, wherein the conductive elastic layer has a surface-treatment layer which has been produced through impregnating a surface portion of the conductive elastic layer with a surface-treating liquid containing an isocyanate compound and carbon black which has undergone dispersion treatment.

Abstract: An object of the present invention is to provide a conductive rubber member which exhibits small environmental dependency and stable electrical resistance. The conductive rubber member is formed of a conductive elastic layer which has been imparted with conductivity by means of a conductivity-imparting agent. The conductive elastic layer has, at a surface portion thereof, a surface-treated layer which has been formed through impregnating the surface with a surface-treatment liquid containing an isocyanate component and an ion-conducting polymer.

Abstract: The present invention provides a conductive roller which has excellent resilience in response to deformation and exhibits small variation in electrical resistance. The conductive roller has a metallic core, a conductive elastic layer formed on the outer surface of the core to which layer conductivity has been imparted by carbon black, and a surface-treated layer formed through impregnating a surface of the conductive elastic layer with a surface-treatment liquid, wherein the difference ?Hs (Hs1?Hs2) between micro-hardness Hs1 of a surface of the conductive roller and micro-hardness Hs2 of the conductive elastic layer after removal of the surface-treated layer, the hardness being determined by means of a micro-hardness tester, is 5% or less of the micro-hardness Hs2.

Abstract: To provide a conductive rubber member which exhibits small variation in electrical resistance and a stable electrical resistance for a long period of time. The conductive rubber member include a conductive elastic layer formed of a rubber material which has been imparted with electrical conductivity, wherein the conductive elastic layer has a surface-treatment layer which has been produced through impregnating a surface portion of the conductive elastic layer with a surface-treating liquid containing an isocyanate compound and carbon black which has undergone dispersion treatment.

Abstract: An object of the present invention is to provide a conductive rubber member which exhibits small environmental dependency and stable electrical resistance. The conductive rubber member is formed of a conductive elastic layer which has been imparted with conductivity by means of a conductivity-imparting agent. The conductive elastic layer has, at a surface portion thereof, a surface-treated layer which has been formed through impregnating the surface with a surface-treatment liquid containing an isocyanate component and an ion-conducting polymer.

Abstract: The present invention provides a conductive roller which has excellent resilience in response to deformation and exhibits small variation in electrical resistance. The conductive roller has a metallic core, a conductive elastic layer formed on the outer surface of the core to which layer conductivity has been imparted by carbon black, and a surface-treated layer formed through impregnating a surface of the conductive elastic layer with a surface-treatment liquid, wherein the difference ?Hs (Hs1-Hs2) between micro-hardness Hs1 of a surface of the conductive roller and micro-hardness Hs2 of the conductive elastic layer after removal of the surface-treated layer, the hardness being determined by means of a micro-hardness tester, is 5% or less of the micro-hardness Hs2.