Patent ID: 6703094
Filing Date: 2004-03-09
Classification: G03G,Y10T

Abstract:
A charging member comprising a conductive mandrel, a semiconductive foamed elastic layer provided on the periphery of said mandrel, and a functional double-layer film provided on the periphery of said semiconductive foamed elastic layer,said semiconductive foamed elastic layer being a layer formed by making said mandrel and a semiconductive rubber composition standing uncured and unfoamed pass through a crosshead die of an extruder to set the semiconductive rubber composition on the periphery of said mandrel, followed by curing and foaming, said semiconductive rubber composition having a Mooney viscosity of from 15 to 30 and having a curing percentage of 40% or less when the foaming pressure reaches 50%, and said functional double-layer film being a double-layer tube having a thin layer that is sufficiently thin such that a tube formed out of only said thin layer is hard to use for covering said semiconductive foamed elastic layer.