| 摘要 |
There are disclosed an electroconductive member comprising a high-molecular material, e.g. polyurethane as a matrix and a quaternary ammonium salt of an organic acid, e.g. bis-or-mono(quaternary ammonium) oxalate; and an electrophotographic apparatus which makes use of the electroconductive member, especially in the form of an electroconductive roller as a developing member, image transfer member, etc. The electroconductive member, when used in electrophotographic mechanism, minimizes an increase in electric resistance at the time of normal continuous passage of an electric current and also variation range in the electric resistance between the circumstances of low temperature/humidity and those of high temperature/humidity.
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