Fujifilm Business Innovation Corp.

Fuji Xerox Co., Ltd.

Taisuke Fukui

Wataru Yamada

Masahiro Iwasaki

Keisuke Kusano

Yuto Okazaki

Ryosuke Fujii

Takahiro Nakamura

Shingo Suda

A fluorine-containing resin particle contains 0 or more and 30 or less carboxyl groups per 10carbon atoms and 0 ppm or more and 3 ppm or less of a basic compound.

Fluorine-containing resin particle, composition, layer-shaped article, electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer on the conductive substrate. The outermost surface layer of the electrophotographic photoreceptor contains fluorine-containing resin particles, a fluorine graft polymer, and an acidic compound having an acid dissociation constant (pKa) of 3 or less in water at 25&#xb0; C. The amount of the acidic compound relative to the outermost surface layer is 100 ppm or more and 10000 ppm or less.

Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer on the conductive substrate. The electrophotographic photoreceptor has an outermost surface layer that contains fluorine-containing resin particles and a fluorine-containing graft polymer. The fluorine-containing resin particles contain 0 or more and 30 or less carboxy groups per 10carbon atoms. The outermost surface layer has a dielectric constant of 3.75 or more and 3.90 or less. The contact angle of pure water on the outermost surface layer is 90&#xb0; or more.

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed on the conductive substrate. An outermost surface layer of the electrophotographic photoreceptor contains a fluorine-containing resin particle and a fluorine-based graft polymer having a fluorinated alkyl group. A ratio of an amount of a fluorine-based graft polymer separated from the fluorine-containing resin particle to a total amount of the fluorine-based graft polymer in the outermost surface layer is 15% or less.

A dispersant attached polytetrafluoroethylene particle on whose surface a dispersant having a fluorine atom is attached has a content of perfluorooctanoic acid of from 0 ppb to 25 ppb with respect to the polytetrafluoroethylene particle, and a composition contains a polytetrafluoroethylene particle and a dispersant having a fluorine atom in which a content of perfluorooctanoic acid is from 0 ppb to 25 ppb with respect to the polytetrafluoroethylene particle.

Dispersant attached polytetrafluoroethylene particle, composition, layered material, electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed on the conductive substrate. An outermost surface layer of the electrophotographic photoreceptor contains fluorine-containing resin particles and a fluorine-containing graft polymer having a fluorinated alkyl group. In an infrared absorption spectrum of the fluorine-containing graft polymer, a ratio of a peak area in a wavenumber range of from 1,020 cmto 1,308 cmto a peak area in a wavenumber range of from 1,673 cmto 1,779 cmis 2.7 or more and 4.8 or less.

Electrophotographic photoreceptor, process cartridge, and image-forming apparatus

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed on the conductive substrate. An outermost surface layer of the electrophotographic photoreceptor contains fluorine-containing resin particles and a fluorine-containing graft polymer having a structural unit represented by general formula (FA), a structural unit represented by general formula (FB), and a structural unit represented by general formula (FC): where R, R, R, and Reach independently represent a hydrogen atom or an alkyl group; Xrepresents an alkylene chain, a halogen-substituted alkylene chain, &#x2014;S&#x2014;, &#x2014;O&#x2014;, &#x2014;NH&#x2014;, or a single bond; Yrepresents an alkylene chain, a halogen-substituted alkylene chain, &#x2014;(CH(OH))&#x2014;, or a single bond; Qrepresents &#x2014;O&#x2014; or &#x2014;NH&#x2014;; fl, fm, and fn each independently represent an integer of 1 or more; fp, fq, fr, and fs each independently represent an integer of 0 or 1 or more; ft represents an integer of 1 or more and 7 or less; fx represents an integer of 1 or more; Rand Reach independently represent a hydrogen atom or an alkyl group; and fz represents an integer of 1 or more.

Growing community of inventors

Kanagawa, Japan

Taisuke Fukui