Fuji Xerox Co., Ltd.

Yasuhiro Niida

Jiro Korenaga

Yukimi Kawabata

Kazuyuki Tada

Taketoshi Hoshizaki

Takuro Hoshio

Kosuke Narita

Yasuhiko Kinuta

Hiroyuki Miura

Yoshiyuki Hayashi

An electrophotographic photosensitive member includes a conductive base and a single-layer-type photosensitive layer on the conductive base. The photosensitive layer contains a binder resin, a charge generation material, a hole transport material, a fluorine-atom-containing electron transport material, and fluorine-atom-containing resin particles. An amount of the charge generation material in the photosensitive layer is 0.5% by weight or more and less than 2.0% by weight. The charge generation material has a distribution that satisfies Formula (1): 30&#x2266;a/b in a thickness direction of the photosensitive layer where a and b are as defined in the specification, and b may be 0. The fluorine-atom-containing electron transport material has a distribution that satisfies Formula (2): 30&#x2266;c/d in the thickness direction of the photosensitive layer where c and d are as defined in the specification, and d may be 0.

Electrophotographic photosensitive member, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate, and a single-layer type photosensitive layer that contains a binder resin, a charge generating material, a hole transporting material, and an electron transporting material, wherein a content of the charge generating material in the photosensitive layer is 0.5% by weight or more and less than 2.0% by weight and the charge generating material satisfies expression (1): 30&#x2266;a/b, wherein a represents the number of the charge generating materials per unit cross-sectional area in a region ranging from the surface side of the film thickness of the photosensitive layer to a point corresponding to &#x2153;, and b represents the number of the charge generating materials per unit cross-sectional area in a region ranging from the conductive substrate side of the film thickness of the photosensitive layer to a position corresponding to &#x2154;, provided that a case where b is 0 is included.

Electrophotographic photoreceptor, process cartridge, and image forming apparatus

A charging member includes a conductive base material and a conductive outermost layer provided on the conductive base material, wherein the conductive outermost layer has a ten-point average surface roughness Rz of 2 &#x3bc;m to 20 &#x3bc;m and contains a resin and particles in which particles having a particle diameter of 5.0 &#x3bc;m or more and a circularity of 0.8 or less are 30% by number or less with respect to the total number of particles having a particle diameter of 5.0 &#x3bc;m or more and particles having a particle diameter of less than 5.0 &#x3bc;m and a circularity of 0.8 or less are from 20% by number to 80% by number with respect to the total number of particles having a particle diameter of less than 5.0 &#x3bc;m.

Charging member, process cartridge, and image forming apparatus

Growing community of inventors

Kanagawa, Japan

Yasuhiro Niida