Developing roller for electrographic apparatus including a base rubber, a conductive polymer, a conductive carbon black and a binder resin and electrographic apparatus containing the developing roller

摘要

A developing roller for an electrographic imaging apparatus, which comprises a base rubber, a conductive carbon black, a conductive polymer for controlling hardness of the base rubber and dispersion of the carbon black, and a binder resin for inhibiting migration of the conductive polymer to a surface of the developing roller, and an electrographic apparatus comprising the same are provided. The developing roller has excellent hardness, processibility, stability to resistance and resistance to migration.