Abstract: The invention has a process of preparing a dispersion liquid by dispersing particles containing a charge transporting substance and a binder resin in liquid medium containing a specific liquid to prepare a dispersion liquid and a process of forming a coat of the dispersion liquid, and heating and drying the coat to dissolve the particles containing the charge transporting substance and the binder resin with liquid medium to form a charge transporting layer.

Abstract: An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.

Abstract: A method of producing an electrophotographic photosensitive member includes: preparing a solution including a charge transporting substance, and at least one compound selected from the group consisting of a fluorine-atom-containing polyacrylate, a fluorine-atom-containing polymethacrylate, a polycarbonate having a siloxane bond, a polyester having a siloxane bond, a polystyrene having a siloxane bond, a silicone oil, a polyolefin, an aliphatic acid, an aliphatic acid amide and an aliphatic acid ester; preparing an emulsion by using the solution and water; forming a coat of the emulsion on a support; and heating the coat to form a charge transporting layer.

Abstract: Provided is coating film-removing method for removing unnecessary coating film on outer peripheral surface of lower side of cylindrical substrate by dip coating, the method comprising: supplying solvent to inside of substrate; causing, through use of outer peripheral surface coating film-removing member configured to remove coating film at portion to be subjected to coating film removal in outer peripheral surface of the substrate, the outer peripheral surface coating film-removing member to abut against region ranging from upper end to lower end of coating film at the portion; and removing, under a state wherein the outer peripheral surface coating film-removing member abuts against the region, the coating film at the portion through rubbing by relatively rotating the substrate and the outer peripheral surface coating film-removing member while supplying the solvent, which is supplied to inside and then flows to lower end of the substrate, to abutting portion.

Abstract: A support, a conductive layer, and an intermediate layer of an electrophotographic photosensitive member have a particular surface profile. The intermediate layer is a cured film containing particles.

Abstract: An electrophotographic photosensitive member comprises a support, an undercoat layer, a charge generation layer and a hole transporting layer disposed in this order. The undercoat layer contains silica particles and a polymer of a composition including an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent. The content of the electron transporting material in the composition is 30 to 70 mass % relative to the total mass of the composition and the content of the silica particles in the undercoat layer is 1 to 30 mass % relative to the total mass of the electron transporting material.

Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer. The undercoat layer is an electron transporting layer and contains a metal salt of organic acid having at least one metal element selected from Fe, Co, Ni, Cu, and Zn.

Abstract: An electrophotographic photosensitive member that abuts with a charging member and/or a developer carrying member with an abutting member interposed therebetween, wherein the electrophotographic photosensitive member has a first portion and a second portion abutting with the abutting member along the longitudinal direction thereof, the electrophotographic photosensitive member has a support, a charge generation layer containing a charge generating material and a polyacetal resin, and a surface layer in this order, the electrophotographic photosensitive member has, in the first portion, an undercoat layer containing a polymerized product of a composition including an electron transporting material and a cross-linking agent, the layer being adjacent to a surface of the charge generation layer, facing the support, and the electrophotographic photosensitive member has, in the second portion, an intermediate layer containing a metal oxide particle and a phenol resin, the layer being between and adjacent to the sup

Abstract: Provided are a process cartridge and an image-forming method each of which has a satisfactory cleaning property even at the initial stage of the use of a brand-new process cartridge or electrophotographic apparatus, and hence can suppress a reduction in image quality due to the contamination of a charging member. The charge transporting layer of an electrophotographic photosensitive member contains a specific polyarylate resin or polycarbonate resin, and a toner contains a specific fine particle on the surface of a toner particle.

Abstract: In a process for producing an electrophotographic photosensitive member, in particular, a process of forming a charge transporting layer, a production process is provided by which the stability of a charge transporting layer coating fluid even after its storage for a long time is improved so as to form a coat for a charge transporting layer having a high uniformity.

Abstract: Provided is an electrophotographic photosensitive member, including: a support; an undercoat layer formed on the support; and a photosensitive layer formed on the undercoat layer, in which the undercoat layer includes a cured product of a composition including (i) an isocyanate compound having a structure represented by the following specific formula (1), (ii) at least one resin selected from a polyvinyl acetal and an acrylic polyol; and (iii) a compound represented by any one of the specific formulae (A1) to (A8).

Abstract: A method for producing an electrophotographic photosensitive member has a charge transporting layer, including preparing a first solution containing a specified first liquid, a charge transporting substance and a binder resin, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer, and a method for producing an organic device has a charge transporting layer, including preparing a first solution containing a specified first liquid and a charge transporting substance, preparing a second solution containing a specified second liquid and water, preparing an emulsion from the first and second solutions, forming the emulsion coating, and heating the coat to form the charge transporting layer are used.

Abstract: The present invention provides a method of producing an electrophotographic photosensitive member in which the amount of an organic solvent to be used for a coating solution for a charge transporting layer is reduced, and the stability of the coating solution for a charge transporting layer after preservation for a long time is improved, enabling formation of a charge transporting layer having high uniformity. The method includes: preparing a solution containing a charge transporting substance, a resin having a carbonyl group, and at least one compound selected from the group consisting of a compound represented by the formula (A), a compound represented by the formula (B), a compound represented by the formula (C), a compound represented by the formula (D), and a compound represented by the formula (E); dispersing the solution in water to prepare an emulsion; forming a coat by using the emulsion; and heating the coat to form a charge transporting layer.

Abstract: Provided is a process for producing an electrophotographic photosensitive member, the process including the steps of: preparing a dispersion liquid by dispersing particles each containing an electron transporting substance in an aqueous dispersion medium; forming the coat of the dispersion liquid on the support; and forming an undercoat layer by heating the coat at a temperature equal to or more than the melting point of the electron transporting substance.

Abstract: An electrophotographic photosensitive member includes a laminated body including a conductive support, a first intermediate layer on the conductive support, and a second intermediate layer on the first intermediate layer, the first intermediate layer containing a binder resin and a metal oxide particle whose surface have been treated with an organic compound, and the second intermediate layer containing a cured product having electron transportability, in which the laminated body satisfies the following expression (1): R—nV/R_0V?0.80??(1).

Abstract: An undercoat layer of an electrophotographic photosensitive member contains a polymerized product of (cured material) a composition that contains a particular crosslinking agent, a particular resin, and a particular charge transporting substance.

Abstract: Provided is a process for producing an electrophotographic photosensitive member having high uniformity of the surface of its undercoat layer by which the usage of an organic solvent is reduced and the stability of an application liquid for an undercoat layer after its long-term storage is improved in the step of forming the undercoat layer. The process for producing an electrophotographic photosensitive member includes the steps of: preparing a solution containing a liquid whose solubility in water at 25° C. and 1 atmosphere is 3.0 mass % or less and an electron transporting substance; preparing an emulsion by dispersing the solution in water; forming a coat of the emulsion on a support; and forming the undercoat layer by heating the coat.

Abstract: A charge-transporting layer, which is a surface layer of an electrophotographic photosensitive member, has a matrix-domain structure having a matrix containing constituent ? (a polycarbonate resin having a predetermined repeating structural unit) and a charge-transporting substance, and a domain containing constituent ? (a polycarbonate resin having a repeating structural unit having a predetermined siloxane moiety).

Abstract: The present invention relates to an electrophotographic photosensitive member including an undercoat layer containing metal oxide particles, a binder resin, and an organic acid metal salt having at least one metal element selected from the group consisting of bismuth, zinc, cobalt, iron, nickel, and copper.

Abstract: An electrophotographic photosensitive member has a laminated body, and a hole transporting layer formed on the laminated body, wherein the laminated body is a laminated body having a conductive support, an electron transporting layer and a charge generating layer. When an impedance is measured by forming a circular-shaped gold electrode having a thickness of 300 nm and a diameter of 10 mm on a surface of the charge generating layer of the laminated body by sputtering, and applying an alternating electric field of 100 mV and 0.1 Hz between the conductive support and the gold electrode, the laminated body of the electrophotographic photosensitive member satisfies the following expression (1): R_opt/R_dark?0.