DEVELOPER LAYER FORMING MEMBER AND DEVELOPING DEVICE AND IMAGE FORMING DEVICE USING THE MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a developer layer forming member capable of supplying a developer over a long period of time while keeping a uniform thin layer state when the member is applied to an image forming device using an electrophotographic system or an electrostatic recording system. SOLUTION: The developer layer forming member is used in contact with the surface of a developer support and forms a thin layer of a developer on the surface of the developer carrier while charging the developer to a prescribed polarity. The developer layer forming member comprises a polyurethane containing a prepolymer obtained by prepolymerizing a polyol with a polyisocyanate as a constituent component.