Conductive roller and manufacturing method thereof

A manufacturing method of a conductive roller comprising:

• an elastic layer formation step (A) in which a coating for elastic layers containing a liquid absorbing agent is applied on the outer periphery of a shaft by a dipping method and dried to form an elastic layer;
• and
• a surface layer formation step (B) in which, after the elastic layer formation step (A), a coating for surface layers is applied on the formed elastic layer by a dipping method and dried to form a surface layer,
• wherein, as the coating for elastic layers and the coating for surface layers, ones containing a water-based coating are used, and the water-based coating is an emulsion or dispersion, and
• the water-based coating used in the elastic layer is a water-based acrylic resin having acrylonitrile and n-butyl acrylate as essential components and optionally having other monomers, and the monomer ratio of n-butyl acrylate and acrylonitrile is in a range of 1 to 25:99 to 75 based on molar ratio.

A conductive roller comprising a shaft, at least one elastic layer formed on the outer periphery of the shaft and a surface layer formed on the outer peripheral surface of the elastic layer, wherein

• the elastic layer is formed by using a coating for elastic layers containing a liquid absorbing agent, and the surface layer is formed by using a coating for surface layers,
• wherein both of the coating for elastic layers and the coating for surface layers contain a water-based coating,
• the liquid absorbing agent is water absorbing polymer,
• the amount of the water absorbing polymer is 0.1 to 3.0 parts by mass with respect to 100 parts by mass of the water-based coating contained in the coating of the elastic layer, and
• the water-based coating used in the elastic layer is a water-based acrylic resin having acrylonitrile and n-butyl acrylate as essential components and optionally having other monomers, and the monomer ratio of n-butyl acrylate and acrylonitrile is in a range of 1 to 25:99 to 75 based on molar ratio.