| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a charging member having an elastic layer to which a component derived from a developer hardly adheres and in which the occurrence of permanent compression set is suppressed even when used for a long period of time. <P>SOLUTION: A charging member comprises a conductive support body 11 and a conductive elastic layer 12. The elastic layer 12 is formed by irradiating with electron beams the surface of a rubber layer composed of a crosslinked product of a rubber mixture of acrylonitrile-butadiene rubber and styrene-butadiene rubber. The styrene-butadiene rubber has at least one selected from a 1,2-vinyl bond, a cis-1,4 bond and a trans-1,4 bond and the ratio of the sum of the cis-1,4 bond and the trans-1,4 bond is 31 mol% or more and 61 mol% or less relative to the total molar number of the 1,2-vinyl bond, the cis-1,4 bond and the trans-1,4 bond. <P>COPYRIGHT: (C)2012,JPO&INPIT |
