| 摘要 |
PROBLEM TO BE SOLVED: To provide a photoreceptor having satisfactory electrostatic charging properties, reduced residual potential, excellent repeated stability and environmental properties, and free from image defects such as moire and fogging. SOLUTION: The photoreceptor includes an undercoat layer and a photosensitive layer which are sequentially formed on an electrically conductive support. The undercoat layer contains two or more kinds of acicular titanium oxides with different dimensions and a binder resin, and the blending ratio (weight) of them is 10/90 to 99/1. The average value of the aspect ratios of the acicular titanium oxides is 1.5 to 300, and the volume resistance value in a green compact under the press pressure of 100 kg/cm<SP>2</SP>in the acicular titanium oxides is 10<SP>5</SP>to 10<SP>10</SP>Ωcm. The acicular titanium oxides each contains large acicular titanium oxides in which the length of a minor axis is 0.03 to 0.25μm and the length of a major axis is 0.1 to 5μm, and small acicular titanium oxides in which the length of a minor axis is 0.01 to 0.06μm and the length of a major axis is 0.03 to 0.3μm, and the blending ratio (weight) of them is 90/10 to 10/90. COPYRIGHT: (C)2008,JPO&INPIT
|
