Patent ID: 8744324
Filing Date: 2014-06-03
Classification: G03G

Abstract:
1. A semiconductive roller comprising: a roller body having an outer peripheral surface made of a crosslinked substance of a semiconductive rubber composition and exhibiting Shore A hardness of not more than 60, wherein the semiconductive rubber composition contains a base polymer made of a mixture of: (1) mixed rubber N of liquid nitrile rubber and solid nitrile rubber; (2) chloroprene rubber C; and (3) epichlorohydrin rubber E in a mass ratio (C+E)/N of greater than or equal to 10/90 and less than 80/20, the ratios of the chloroprene rubber and the epichlorohydrin rubber in the total quantity of the base polymer are not less than 5 mass % and not less than 5 mass % respectively, and roller resistance at an applied voltage of 5 V is not less than 10