Patent application number | Description | Published |
20110217072 | CHARGING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - The present invention relates to a charging member that achieves a high level of compatibility between the suppression of the bleeding of a low-molecular weight component from its elastic layer to its surface and charging performance for an electrophotographic photosensitive member. The charging member has a substrate, an elastic layer, and a surface layer. The surface layer contains a polymer having a Si—O—Ti bond, and the polymer has a constitutional unit represented by the following general formula (1) and a constitutional unit represented by the following general formula (2). | 09-08-2011 |
20120076535 | CHARGING MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - A charging member is provided in which exudation of a low molecular weight component from an elastic layer to the surface is suppressed, and at the same time, charging performance of the electrophotographic photosensitive member are provided at a high level. The charging member includes a substrate, an elastic layer and a surface layer, wherein the surface layer includes a polymer compound having the structural units represented by the following formulas (1), (2) and (3), and having a Si—O—Ti bond, a Ti—O—Ta bond, and a Si—O—Ta bond: | 03-29-2012 |
20120107565 | CHARGING MEMBER AND METHOD FOR MANUFACTURING THE SAME - Provided is a charging member having a rough surface, thereby suppressing adhesion of dirt on the surface. A charging member having a supporting member, an elastic layer and a surface layer, in which the surface layer contains a polymer compound, which has a Si—O-M bond and at least one structural unit selected from structural units represented by the following general formula (1) and the following general formula (2), and has a structural unit represented by the following general formula (3); the charging member has cracks developing from the surface thereof and reaching the elastic layer; and the cracks each have convexly raised edges, by which the surface thereof is roughened. | 05-03-2012 |
20120141159 | CHARGING MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - A charging member is provided with a surface layer that can not easily wear even due to its contact with a photosensitive member and also has an appropriate elasticity contributing to the formation of an appropriate nip between it and the photosensitive member. The charging member has a substrate, an elastic layer and a surface layer; the surface layer containing a high-molecular compound having an Si—O—Hf linkage and having a constitutional unit represented by the formula (1) and a constitutional unit represented by the formula (2): | 06-07-2012 |
20120141160 | CHARGING MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is a charging member provided with a surface layer capable of suppressing the bleeding of a low-molecular weight component from an elastic layer with improved reliability. The charging member comprises a support, an elastic layer, and a surface layer, and the surface layer contains a polymer having an Si—O—Ta bond and having a structural unit represented by the following structural formula ( | 06-07-2012 |
20120148306 | CHARGING MEMBER AND PROCESS FOR ITS PRODUCTION - To provide a charging member to the surface of which any toners and so forth can be kept from adhering and which can exhibit a stable charging performance. The charging member has a substrate, an elastic layer and a surface layer; the surface layer containing a high-molecular compound having an Si—O—B linkage and having a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (2). | 06-14-2012 |
20120301180 | CHARGING MEMBER, PROCESS FOR ITS PRODUCTION, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - Provided a charging member which can prevent any contaminants deposited on a cleaning member from adhering thereto by making low a surface free energy and coefficient of friction thereof. The charging member has a substrate, an elastic layer and a surface layer, and the surface layer contains a polymer having an Si—O—W linkage; the polymer having a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (2): | 11-29-2012 |
20130004206 | CHARGING MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - A charging member for electrophotographic apparatus is provided which has a superior charging performance for the electrophotographic photosensitive member and also can not easily change with time in charging performance. The charging member has a substrate, an elastic layer and a surface layer, which surface layer contains a high-molecular compound having an Si—O—Ti linkage in the molecular structure and a cyclic polysilane represented by the general formula (7) defined in the specification, and the high-molecular compound has a constituent unit represented by the general formula (1) and a constituent unit represented by the following formula (2) which are defined in the specification. | 01-03-2013 |
20130034369 | CHARGING MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - A charging member is provided which can uniformly charge a photosensitive member without requiring any pre-exposure means in a low-, medium- or high-speed electrophotographic apparatus, and has a sufficient charging performance. An electrophotographic apparatus and a process cartridge are also provided which can keep multi-color ghost images from occurring and can form high-grade electrophotographic images stably. The charging member has a substrate, an elastic layer and a surface layer, which surface layer contains a high-molecular compound having an Si—O—Nb linkage; the high-molecular compound having a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (2). | 02-07-2013 |
20130064571 | CHARGING MEMBER, METHOD OF PRODUCING THE CHARGING MEMBER, ELECTROPHOTOGRAPHIC APPARATUS, AND PROCESS CARTRIDGE - Provided is a charging member hardly causing a cleaning failure to suppress occurrence of a vertical streak image in an electrophotographic apparatus. The charging member comprises a support, an elastic layer, and a surface layer. The surface layer comprises a polymer compound having at least one bond of Si—O-M bond and Si—O—Ta bond, at least one bond of M-O—Ge bond and Ta—O—Ge bond, and Si—O—Ge bond. M represents any element selected from the group consisting of Ti, Zr, and Hf. The polymer compound has structural units represented by the formula (1) and (2), and at least one structural unit of structural units represented by the formula (3) and (4). The charging member has a crack extending from its surface to the elastic layer, and the crack has a convexly raised edge by which a surface of the charging member is roughened. | 03-14-2013 |
20130064574 | CHARGING MEMBER AND METHOD OF PRODUCING THE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS - Provided are the following charging member and a method of producing the charging member. The charging member has an improved charging ability and hence alleviates, in particular, a positive ghost. The charging member can maintain resistance to the adhesion of toner, a toner external additive, or the like over a long time period. The charging member for an electrophotographic apparatus comprises an electro-conductive support, an electro-conductive elastic layer, and a surface layer, wherein the surface layer comprises a polymer compound having an Si—O—Ti linkage in a molecular structure thereof, and the polymer compound has each of constitutional units represented by a formula (1), a formula (2), and a formula (3) defined in the description. The method is a method of producing the charging member. | 03-14-2013 |