Patent classifications
G03G5/14769
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
Provided is an electrophotographic photosensitive member including a surface layer containing: a copolymerization product of a composition containing a hole-transportable compound having a chain-polymerizable functional group and a compound having a specific structure; and metal oxide particles.
Organic photoconductor drum having an overcoat containing nano metal oxide particles and method to make the same
An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.
Organic photoconductor drum having an overcoat containing nano metal oxide particles and method to make the same
An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.
Photosensitive body including protective layer formed on photosensitive layer
A photosensitive body is provided. The photosensitive body includes a photosensitive layer, and a protective layer formed on the photosensitive layer, and the protective layer includes a urethane oligomer acrylate and a modified perfluoropolyether acrylate.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
An electrophotographic photosensitive member includes a support, an undercoat layer, a photosensitive layer, and a surface layer, the undercoat layer containing a binder resin and strontium titanate particles, the surface layer being a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from OH, OCH.sub.3, NH.sub.2, SH, and COOH.
PHOTOCONDUCTOR OVERCOAT CONSISTING OF NANO METAL OXIDE PARTICLES
An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device and method to make the same is provided. The overcoat layer is prepared from a curable composition having no charge transport materials but including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups. This overcoat layer improves wear resistance of the photoconductor drum without negatively altering the electrophotographic properties
PROCESS CARTRIDGE AND IMAGE-FORMING APPARATUS
Provided is an image-forming apparatus including: an electrophotographic photosensitive member including a support, a photosensitive layer, and a protective layer in the stated order; a charging unit; an exposing unit; a developing unit; a transferring unit; and a cleaning unit configured to clean off the toner, which remains on the electrophotographic photosensitive member after the transfer of the toner image from the electrophotographic photosensitive member by the transferring unit, with a cleaning blade, wherein the electrophotographic photosensitive member includes, on a surface thereof, a fatty acid metal salt-supplying unit configured to supply a fatty acid metal salt having 16 or more and 18 or less carbon atoms, and wherein the protective layer has a triphenylamine structure, one of an acryloyloxy group and a methacryloyloxy group, and a specific structure.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
The present invention provides an electrophotographic photosensitive member sequentially including: a support; a photosensitive layer; and a protection layer formed on the support, wherein the protection layer has a triarylamine structure and a specific cyclic structure, and a specific A-value obtained by measurement using total reflection Fourier transform infrared spectroscopy is 0.010 or more and 0.050 or less.
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS
An electrophotographic photosensitive member having a protective layer wherein the density unevenness among output images is reduced with abrasion resistance maintained is provided. The present invention is an electrophotographic photosensitive member having a support, a photosensitive layer and a protective layer in this order, wherein the protective layer has a triarylamine structure and a cyclic structure represented by the formula (1) or (2):
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and an A value expressed by expression (4), A=S1/S2, wherein, in expression (4), S1 is a peak area based on in-plane deformation vibration of terminal olefin (CH.sub.2), and S2 is a peak area based on stretching vibration of CO among peak areas of a spectrum obtained by measuring a surface of the protective layer by total reflection Fourier transform infrared spectroscopy using Ge as an internal reflection element and using a measurement condition of 45 as an incidence angle is from 0.065 to 0.100.
ORGANIC PHOTOCONDUCTOR DRUM HAVING AN OVERCOAT CONTAINING NANO METAL OXIDE PARTICLES AND METHOD TO MAKE THE SAME
An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.