ELECTROCONDUCTIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHY DEVICE

摘要

The present invention addresses the problem of reducing the electrical resistance value of an electroconductive roller in an L/L environment while at the same time suppressing excessive reduction of resistance thereof in an H/H environment. An electroconductive member for electrophotography, having an electroconductive core body, and an electroconductive layer provided on the external periphery of the core body, the electroconductive member for electrophotography characterized in that the electroconductive layer includes a binder resin having an alkylene oxide structure and a sulfo group or quaternary ammonium group as an ion-exchange group in the molecule thereof, and an ion of opposite polarity to the ion-exchange group, the water content of the electroconductive layer in an environment of temperature 30°C and relative humidity 80% is 10 mass% or less, and the spin-spin relaxation time T2 of the electroconductive layer as found by pulse NMR measurement in an environment of temperature 15°C and relative humidity 10% and using hydrogen nuclei as the measured nuclei is at least 200 µsec.