| 摘要 |
PURPOSE:To stably obtain high-quality images which are free from the generation of the dotty fogging by the nonuniformity of electrostatic charge, the image defects, etc., by the discharge breakdown of a photosensitive body by incorporating ester of polyamino acid into a surface layer. CONSTITUTION:The electrostatic charging member 1 is formed by laminating a base layer 3 and the surface layer 4 in this order on a conductive base body 2 and incorporating the ester of polyamino acid into the surface layer 4. The ester of polyamino acid is exemplified by ester of polyglutamie acid, such as poly-gamma-methyl glutamate, poly-gamma-ethyl glutamate, and poly-gamma-benzyl glutamate. Electrostatic charge is enabled and the image defects are eliminated by incorporating the ester of polyamino acid into the surface layer in such a manner. In addition, the volume resistivity is regulated and the generation of a voltage drop by the flow of an excess current in the case of the presence of the defects, such as breakdown, in the electrophotographic sensitive body is lessened. Further, the fluctuation in the volume resistivity is decreased even at and under a low temp. and low humidity and the stable electrostatic chargeability is obtd. |
