Patent ID: 8718518
Filing Date: 2014-05-06
Classification: G03G

Abstract:
1. A development roll for electrophotographic equipment, comprising: a shaft body; a rubber elastic layer formed by molding on an outer circumference of the shaft body and having a plurality of convex portions formed by transfer molding on the outer circumferential surface thereof; and a coating layer disposed on an outer circumference of the rubber elastic layer, wherein the coating layer comprises a cured body of a coating material comprising (A) a thermoplastic urethane having a number-average molecular weight in the range of 50,000 to 200,000, (B) a polyol having a number-average molecular weight in the range of 500 to 4,000, and (C) a curing agent; and wherein the mass percentages a, b, and c of the components (A), (B), and (C) in the coating material satisfy the following expressions: a+b+c=100, 40≦a≦75, 5≦b≦20, and 20≦c.