Patent ID: 10942472

Abstract:
An electrophotography device development roller in which an increase in the electric charge of a toner is suppressed is provided. This electrophotography device development roller 10 is provided with a shaft 12, an elastic layer 14 formed on the outer circumference of the shaft 12, and a surface layer 16 formed on the outer circumference of the elastic layer 14. The surface layer 16 contains components (a) to (c) below. Component (a) a binder comprising acrylonitrile-butadiene rubber having an acrylonitrile amount of 30 mass % or more; component (b) an ion-conducting agent comprising at least one selected from a phosphonium salt and a pyridinium salt; and component (c) an electric charge regulator comprising an acrylic polymer having a silicone group or fluorine-containing group and a cationic group.