Fujifilm Business Innovation Corp.

Fuji Xerox Co., Ltd.

Michinori Fukuma

Jiro Korenaga

Yoichi Kigoshi

Masahiro Iwasaki

Keisuke Kusano

Kosuke Narita

Satoshi Mizoguchi

Shuhei Yamazaki

Ryota Kaneko

An electrophotographic photoconductor includes a conductive substrate, and a photoconductive layer, in which an outermost surface layer contains a binder resin, a charge transporting material, fluorine-containing resin particles, and an acidic compound, the number of carboxyl groups in the fluorine-containing resin particles is 0 or more and 30 or less per 10carbon atoms of the fluorine-containing resin particles, and in a case where charging and exposure of the electrophotographic photoconductor are repeated 10,000 times under conditions of a charging potential of −700 V and an exposure intensity of 5 mJ/m, an absolute value |RP−RP| of a difference between a residual potential RPafter charging and exposure once and a residual potential RPafter charging and exposure 10,000 times is 25 V or less.

Electrophotographic photoconductor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer on the conductive substrate, a charge generation layer on the undercoat layer, a charge transport layer on the charge generation layer, and an inorganic protection layer on the charge transport layer, in which the charge transport layer contains a binder resin and a charge transport material, and, when impedance of the charge transport layer is measured, a ratio (C/C) of an electrostatic capacitance Cat 1 Hz to an electrostatic capacitance Cat 10 Hz is 1.1 or less.

Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed so as to overlie the conductive substrate and containing a first charge-transporting material having two triphenylamine skeletons and a charge mobility of approximately 4&#xd7;10cm/Vs or more and at least one second charge-transporting material selected from the group consisting of a charge-transporting material having one triphenylamine skeleton and a charge mobility of approximately 5&#xd7;10cm/Vs or more, a charge-transporting material having two triphenylamine skeletons and being different from the first charge-transporting material, and a charge-transporting material having three triphenylamine skeletons, wherein the second charge-transporting material content is approximately from 0.2 weight % to 1.0 weight % relative to the total charge-transporting material content.

Growing community of inventors

Kanagawa, Japan

Michinori Fukuma