Sharp Kabushiki Kaisha Corporation

Makoto Kurokawa

Masayuki Sakamoto

Yasutaka Maeda

Hideaki Taniguchi

Masaya Tsugoshi

Satoshi Katayama

Yoshihide Shimoda

Kazushige Morita

Tomoko Kanazawa

Tadashi Nakamura

Shuhei Tsuchimoto

Kiyofumi Morimoto

Mikio Kakui

Akihiko Kawahara

Tatsuhiro Morita

Satoshi Machino

Hiroko Ishibashi

A photosensitive body for electrophotographical use has a conductive base body and a marking area provided thereon. The maximum surface roughness of a photosensitive layer provided right on the marking area is specified not to exceed 2.5 &mgr;m. And also, a ratio of the optical reflective index of the marking area to the optical reflective index of the non-marking area is specified to be in a range of 0.3 to 0.7. In this manner, even when the photosensitive layer is thin (not exceeding 25 &mgr;m), it is possible to prevent problems such as inadequate cleaning and toner falling. Hence, it is possible to offer a photosensitive body for electrophotographical use which can constantly produce high quality copied images.

Photosensitive body for electrophotographical use and manufacturing method thereof

Highly sensitive and highly durable electrophotographic photoreceptors which generate faultless images can be produced by forming the under-coating layer on the conductive support and forming the photoreceptive layer on the layer. The under-coating layer contains dendritic titanium oxide. The under-coating layer contains the dendritic titanium oxide of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s). The photoreceptive layer contains a phthalocyanine pigment, and the under-coating layer contains dendritic or needle-like titanium oxide of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s). The photoreceptive layer contains a phthalocyanine pigment, and the under-coating layer contains dendritic or needle-like titanium oxide, of which the surface is coated with (a) metal oxide(s) and/or (an) organic compound(s), and an alcohol soluble polyamide resin.

Electrophotographic photoreceptor, process for production thereof, and

A photosensitive body for electrophotographical use has a conductive base body and a marking area provided thereon. The maximum surface roughness of a photosensitive layer provided right on the marking area is specified not to exceed 2.5 .mu.m. And also, a ratio of the optical reflective index of the marking area to the optical reflective index of the non-marking area is specified to be in a range of 0.3 to 0.7. In this manner, even when the photosensitive layer is thin (not exceeding 25 .mu.m), it is possible to prevent problems such as inadequate cleaning and toner falling. Hence, it is possible to offer a photosensitive body for electrophotographical use which can constantly produce high quality copied images.

Photosensitive body for electrophotographical use and manufacturing

An object of the present invention is to improve the storage stability of a coating liquid for forming a photosensitive layer of a photosensitive member for electrophotography as well as to improve the electrophotography properties of a photosensitive member produced by applying the coating liquid. A photosensitive member for electrophotography is produced by applying a coating liquid composition for a photosensitive member for electrophotography prepared by dissolving or dispersing an organic photoconductive compound and a binder resin in a solvent, and further containing an aliphatic unsaturated hydrocarbon on an electroconductive substrate, and drying for forming a photosensitive layer on the electroconductive substrate.

Coating liquid composition for photosensitive member for

An electrophotographic photoconductor comprising a conductive support, an undercoating layer formed on the conductive support, and a photosensitive layer laminated on the undercoating layer, wherein the undercoating layer comprises non-conductive titanium oxide particles and a polyamide resin, the non-conductive titanium oxide particles being 80 to 99 wt % of the undercoating layer, and the undercoating layer has a thickness of 0.5 to 4.8 .mu.m.

Electrophotographic photoconductor and a method for manufacturing the

An apparatus for the production of photoconductive components for use in electrophotography, including a coating tank that contains a certain amount of coating, the tank having a coating-supply opening, at a lower portion through which the coating is supplied to the tank, and a partition that is positioned between the inner wall of the tank and the outer wall of the electric conductor, whereby when an electric conductor to be coated is immersed in the coating and removed from the coating, occurrence of a turbulent flow of the coating in the vicinity of the electric conductor can be prevented.

Apparatus for the production of photoconductive components for use in

Growing community of inventors

Kitakatsuragi-gun, Japan

Makoto Kurokawa