Electric conductive roller

摘要

Disclosed is an electric conductive roller comprising a rubber having a volume specific resistance of not more than 10<12> OMEGA cm and an electric conductive filler mixed in the rubber, said electric conductive roller satisfying the following formulas (1) and (2): $wherein\; R\; is\; a\; resistance\; of\; the\; roller\; when\; the\; electric\; conductive\; filler\; is\; added,\; and\; R0\; is\; a\; resistance\; of\; the\; roller\; when\; no\; electric\; conductive\; filler\; is\; added.\; This\; electric\; conductive\; roller\; has\; a\; low\; dependence\; of\; an\; electric\; resistance\; on\; a\; change\; in\; applied\; voltage\; and\; environment.\mathop{\mathrm{image}}$