Conductive rubber roller

Abstract

A conductive rubber roller comprising a conductive core material and provided thereon a rubber layer; the rubber layer being formed by using a rubber composition containing as rubber components at least a polar rubber and an ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer; the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer having a melt peak temperature of from 20 to 30 DEG C. and a melt enthalpy change DeltaH of from 40 to 70 mJ / mg as measured with a differential scanning calorimeter; and the allyl glycidyl ether in the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer being in a copolymerization ratio of from more than 10 mol % to 20 mol % or less.

Description

technical field

[0001] The present invention relates to a conductive rubber roller for use in an image forming apparatus such as an electrophotographic copying apparatus, a printing machine, an electrostatic recording apparatus, and more particularly to a conductive rubber roller for use, for example, by means of which a transferable image based on a toner image is transferred to a recording apparatus. A transfer roller of a transfer assembly on a medium such as paper; the toner image is formed by an image forming means such as an electrophotographic process or an electrostatic recording process and remains on an image bearing member such as an electrostatic photosensitive member. Background technique

[0002] In image forming devices such as electrophotographic copying devices and electrostatic recording devices, a contact charging system is common in which a conductive rubber roller, to which a voltage is kept applied, is pressed against the surface of an electrostatic phot...