CHARGE-CONTROLLED URETHANE FOAM AND TONER TRANSFER ROLLER USING THE SAME

摘要

Provided are a charge-controlled urethane foam, which can sufficiently prevent the influence of a charge due to friction between a toner on a surface layer of a transfer roller and a development roller, whereby a high quality image can be stably obtained at a low cost, and a toner transfer roller using the charge-controlled urethane foam. A charge-controlled urethane foam (3) has a surface layer in which a binder resin which is positioned identical to a substrate urethane foam or closer to a positive side than the substrate urethane foam in a triboelectric series is impregnated. A toner transfer roller (13) is comprised of the charge-controlled urethane foam (3) which is carried on an outer periphery of a shaft (1).