Patent application number | Description | Published |
20120114375 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten. | 05-10-2012 |
20120225381 | METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - An electrophotographic photosensitive member is provided in which black spots on an output image are hardly caused by local charge injection from a support to a photosensitive layer. For this purpose, a conductive layer is formed using a coating liquid for a conductive layer prepared using a solvent, a binder material and a metal oxide particle that satisfies the following relation (i): 45≦A×ρ×D≦65 (i) wherein A denotes the surface area of the metal oxide particle per unit mass [m | 09-06-2012 |
20120263494 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - Provided is an electrophotographic photosensitive member which is excellent in terms of both continuous reduction of contact stress with contact members and the like and potential stability during repeated use. A charge transport layer which serves as a surface layer of an electrophotographic photosensitive member has a matrix-domain structure including a matrix containing a component [β] (polycarbonate resin D having a specific repeating structural unit) and a charge-transporting substance and domains containing a component [α] (polycarbonate resin A having a repeating structural unit including a specific siloxane moiety). | 10-18-2012 |
20120301181 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising: at least one resin selected from the group consisting of a polycarbonate resin C and a polyester resin D; and at least one charge-transporting substance selected from the group consisting of a compound represented by the following formula (1) and a compound represented by the following formula (1′), and a domain comprising a polycarbonate resin A. | 11-29-2012 |
20120301182 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - The present invention is an electrophotographic photosensitive member including a charge-transporting layer as the surface layer of the electrophotographic photosensitive member having a matrix-domain structure including: a matrix including a component β (at least one resin of a polycarbonate resin C having a specific repeating structural unit and a polyester resin D having a specific repeating structural unit), and γ (charge-transporting substance having a specific structure); and a domain including a component α (polycarbonate resin A having a repeating structural unit containing a specific siloxane moiety). | 11-29-2012 |
20130202326 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component [β] and a component [γ] (charge-transporting substances having specific structures), and a domain comprising a component [α](resin [α1], or resin [α1] and resin [α2]). | 08-08-2013 |
20130202327 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer, which is provided on the support, in which: a surface layer of the electrophotographic photosensitive member includes a terminal siloxane-containing polyester resin having a specific structure; and a lower layer provided in contact with the surface layer includes a polycarbonate resin, a polyester resin, or a polyvinyl acetal resin, having a specific structure. | 08-08-2013 |
20130236823 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component β and a component γ, and a domain comprising a component α. | 09-12-2013 |
20130316283 | PROCESS FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - To provide a process for producing an electrophotographic photosensitive member that can not easily cause any fog due to an increase in dark attenuation, a conductive layer is formed with use of a coating liquid for conductive layer prepared with use of a solvent, a binder material and metal oxide particles. The metal oxide particles (P) and binder material (B) in the coating liquid for conductive layer are in a mass ratio (P/B) of from 1.5/1.0 to 3.5/1.0. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus or tungsten. Where powder resistivity of the metal oxide particle is represented by x (Ω·cm) and powder resistivity of the titanium oxide particle as a core particle constituting the metal oxide particle is represented by y (Ω·cm), the y and the x satisfy the following relations (i) and (ii): | 11-28-2013 |
20130323632 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - Provided are an electrophotographic photosensitive member in which leakage doesn't easily occur, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and a method of manufacturing the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a conductive layer including titanium oxide particle coated with tin oxide doped with a hetero element. When an absolute value of a maximum current amount flowing through the conductive layer in a case of performing a test of applying −1.0 kV including DC voltage to the conductive layer is defined as Ia, and an absolute value of a current amount flowing through the conductive layer in a case where a decrease ratio of a current amount per minute reaches 1% or less for the first time is defined as Ib, the relations of Ia≦6000 and 10≦Ib are satisfied. A volume resistivity of the conductive layer before the test is 1.0×10 | 12-05-2013 |
20140093277 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten. | 04-03-2014 |