Abstract:
PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which has high and stable wear and scuffing resistances and good electrical properties and realizes improved image quality over a prolonged period of time; a manufacturing method for providing the electrophotographic photoreceptor; an image forming method using such a photoreceptor having a long operating life and high performances; an image forming apparatus; and a process cartridge for the image forming apparatus. SOLUTION: The electrophotographic photoreceptor has at least a photosensitive layer on a conductive support. A surface layer of the photosensitive layer is a crosslinked layer formed by curing at least a trifunctional or higher functionality radical polymerizable monomer having no charge transport structure and a radical polymerizable compound having a charge transport structure by irradiation with light energy in a low oxygen atmosphere having an oxygen concentration of 0.001-2.0 vol.%. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor independent of temperature or humidity variation of an operating environment, having improved stability of electrical properties, and free of image failure such as memory, and to provide a method for manufacturing the same. SOLUTION: In the electrophotographic photoreceptor having a photosensitive layer on a conductive substrate, a vinyl chloride resin is used which is obtained by subjecting a vinyl chloride polymer having hydroxyl groups, epoxy groups and sulfur-containing strong acid radicals as substituents to esterification treatment with an acid to provide a structure in which the epoxy groups and the hydroxyl groups are partly converted into ester groups. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a photoconductive imaging member having excellent photoinduction discharge characteristic, and repetition and environmental stabilities. SOLUTION: The photoconductive imaging member comprises a substrate, a photogenerating layer, and a charge transport layer containing a binder and a compound containing at least two (methyl) acrylates. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PURPOSE:To enhance electrostatic charge generation efficiency and photosensitivity by using a specified polymer as a binder resin for the charge transfer layer of a photosensitive body obtained by successively laminating a charge generating layer and said charge transfer layer on a conductive substrate. CONSTITUTION:A charge generating layer (CGL) and a charge transfer layer (CTL) are laminated in succession on a conductive substrate to form a photosensitive body, and a polymer used for binding a photoconductor in CGL has structural units each represented by the formula shown here in which X, Z are each F, Cl, Br, or I. As the photoconductor to be added to CGM, an org. material, such as copper phthalocyanine, is preferably used. The formation of CGL of such a structure improves flatness or planeness, and also the flatness of the finished photosensitive body, and permits a photosensitive body good charge generating efficiency and high in sensitivity to be obtained and favorably used for the Carlson method.
Abstract:
PURPOSE:To obtain an electrophotographic receptor with high sensitivity while reducing the generation of optical memory and electrifying memory, by providing a charge transfer layer which contains a charge transfer material and a specific acrylic resin and a charge generation layer on a support material. CONSTITUTION:The 5-30mum thickness charge transfer layer which contains 100pts.wt. acrylic resin having a 15-70 deg.C glass transition point, 10-40acid number, and 10,000-50,000 molecular weight and a 10-500pts.wt. charge transfer material (e.g. chloroanil), and the