| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of a flaw and density unevenness in a formed image for a long period by regulating the surface properties of an electrophotographic photoreceptor of an image forming apparatus using an electrostatic charging process of a contactless type. SOLUTION: In the electrophotographic photoreceptor 1 disposed in the image forming apparatus using the electrostatic charging process of the contactless type, the creep value (C<SB>IT</SB>) when the surface is loaded with an indentation maximum load 30 mN under the environment of a temperature 25°C and relative humidity 50% is specified to≥2.70% and the Vickers hardness (HV)of the surface is specified to 20,000 to 25,000. Such electrophotographic photoreceptor 1 is highly flexible, is not excessively soft and has the plasticity not to exhibit brittleness and is therefore excellent in printing durability and cleanability and does not give rise to the flaw and density unevenness in the formed image. COPYRIGHT: (C)2006,JPO&NCIPI
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