Epichlorohydrin composition for conductive roller, conductive roller, charging unit, image forming apparatus, process cartridge, and method of manufacturing conductive roller

A conductive roller, comprising:

• a shaft member having conductivity;
• and
• an elastic layer above an outer periphery of the shaft member,
• wherein the elastic layer includes a rubber composition containing a binary epichlorohydrin rubber and a vulcanizing agent that contains at least sulfur, and
• wherein the rubber composition does not contain a quinoxaline vulcanizing agent and a triazine vulcanizing agent
• wherein the rubber composition further contains a liquid acrylonitrile-butadiene rubber, and
• a composition ratio of the binary epichlorohydrin rubber and the liquid acrylonitrile-butadiene rubber is from about 95:5 to about 70:30 in weight ratio.

A charging unit, comprising:

• a conductive roller;
• and
• a cleaning member that cleans a surface of the conductive roller,
• wherein the conductive roller includes a shaft member having conductivity and an elastic layer above an outer periphery of the shaft member, and
• wherein the elastic layer includes a rubber composition containing a binary epichlorohydrin rubber, a vulcanizing agent that contains at least sulfur, and a liquid acrylonitrile-butadiene rubber, where the rubber composition does not contain a quinoxaline vulcanizing agent and a triazine vulcanizing agent, and a composition ratio of the binary epichlorohydrin rubber and the liquid acrylonitrile-butadiene rubber is from about 95:5 to about 70:30 in weight ratio.

An image forming apparatus, comprising:

• an image holding body;
• a conductive roller;
• a latent image forming part that forms a latent image on a surface of the image holding body;
• a developing part that develops the latent image formed on the surface of the image holding body by a toner to form a toner image;
• and
• a transferring part that transfers the toner image formed on the surface of the image holding body onto a transferred body,
• wherein the conductive roller includes a shaft member having conductivity and an elastic layer above an outer periphery of the shaft member, and
• wherein the elastic layer includes a rubber composition containing a binary epichlorohydrin rubber, a vulcanizing agent that contains at least sulfur, and a liquid acrylonitrile-butadiene rubber, where the rubber composition does not contain a quinoxaline vulcanizing agent and a triazine vulcanizing agent, and a composition ratio of the binary epichlorohydrin rubber and the liquid acrylonitrile-butadiene rubber is from about 95:5 to about 70:30 in weight ratio.

A process cartridge, comprising:

• an image holding body;
• and
• a charging member that charges the image holding body, with the charging member including a conductive roller,
• wherein the conductive roller includes a shaft member having conductivity and an elastic layer above an outer periphery of the shaft member, and
• wherein the elastic layer includes a rubber composition containing a binary epichlorohydrin rubber, a vulcanizing agent that contains at least sulfur, and a liquid acrylonitrile-butadiene rubber, where the rubber composition does not contain a quinoxaline vulcanizing agent and a triazine vulcanizing agent, and a composition ratio of the binary epichlorohydrin rubber and the liquid acrylonitrile-butadiene rubber is from about 95:5 to about 70:30 in weight ratio.