Roll including foam body and method of producing the roll.

摘要

A charging roll is disclosed which includes a center shaft (12), a foam layer (14, 22) formed on an outer circumferential surface of the center shaft, an electrically conductive elastic layer (16) formed on an outer surface of the foam layer, and a resistance adjusting layer (18) and a protective layer (20) formed by coating on an outer surface of the electrically conductive elastic layer. The foam layer consists of an electrically conductive foam body or a foam body a part of which is made electrically conductive. Also is disclosed a method of producing a composite roll, such as the above charging roll, which includes a foam layer formed on a shaft, and a solid elastic layer formed on the foam layer. This method includes the step of forming multiple minute grooves (32, 42) in an outer circumferential surface of a pre-foam tube (34) which gives the foam layer, or an inner circumferential surface of an elastic tube (36) which gives the solid elastic layer.