发明授权
US08792813B2 Transfer roll and image forming apparatus 有权
转印辊和成像装置

Transfer roll and image forming apparatus
摘要:
A transfer roll includes a cylindrical conductive substrate; an inner elastic layer having an Asker-C hardness of from 5° to 20°; and an outer elastic layer having an Asker-C hardness of from 30° to 45° in this order, wherein the transfer roll satisfies the following Expression (1): ρ0(in)>ρ0(out)  Expression (1): wherein ρ0(in) is a volume resistivity of the inner elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state, and ρ0(out) is a volume resistivity of the outer elastic layer that is measured by applying an applied voltage of 1000 V in an environment of a temperature of 22° C. and a humidity of 55 RH % in an unloaded state.
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