| 摘要 |
<p>A conductive roll (1) has a conductive layer of an elastic material (3), a resistance adjusting layer (4), and a protective layer (5) which are formed on the outer periphery of a shaft (2) in the order mentioned. The resistance adjusting layer (4) is formed from a composition containing 10 to 150 parts by weight of an electron conductive agent, not more than two parts by weight of an ion conductive agent and 20 to 80 parts by weight of an insulating filler, relative to 100 parts by weight of nitrile rubber, or nitrile rubber hydride as a base material. The roll has a properly controlled environment dependence of its electric resistance, and avoids any trouble, such as enlarged picture defects, when employed in an electrophotographic process. The roll can be used as a charging roll. <IMAGE></p> |
