Patent ID: 9715192
Date: 2017-07-25
CPC Classifications: F16C,G03G,Y10T

Claim:
1. A semiconductive roller comprising: a conductive support; and a semiconductive elastic layer disposed on a circumferential surface of the conductive support, the semiconductive elastic layer containing at least an epichlorohydrin rubber, an acrylonitrile-butadiene rubber, and a conducting agent and having a foam structure, wherein a mixing ratio of the epichlorohydrin rubber to the acrylonitrile-butadiene rubber ranges from 80/20 to 20/80 by mass, wherein, when the semiconductive roller is immersed in pure water for 30 minutes, a chlorine ion content derived from the semiconductive elastic layer per unit area of the semiconductive elastic layer is approximately not more than 0.06 μmol/cm wherein no electricity has been run through the semiconductive roller before the semiconductive roller is immersed in the pure water for 30 minutes, and wherein a volume resistivity of the semiconductive roller ranges from greater than 7 logΩ·cm to 13 logΩ·cm at 20° C., the semiconductive roller being manufactured by a process comprising a cleaning process that comprises immersing the semiconductive elastic layer into pure water for approximately not less than 30 minutes for cleaning.