Atsushi Ochi

Bio: Atsushi Ochi is an academic researcher from Canon Inc.. The author has contributed to research in topics: Surface layer & Solvent. The author has an hindex of 10, co-authored 26 publications receiving 808 citations.

Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus

Abstract: An electrophotographic photosensitive member capable of persistently exerting an effect of mitigating contact stress with contact members and excellent also in potential stability during repeated use is provided, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member are provided. The charge transport layer serving as a surface layer of the electrophotographic photosensitive member contains a charge transporting material, polyester resin A containing a siloxane moiety and at least one of polyester resin C and polycarbonate resin D. The content of a siloxane moiety in polyester resin A is not less than 10% by mass and not more than 40% by mass relative to the total mass of polyester resin A. The charge transport layer has a matrix-domain structure having a matrix formed of the charge transporting material and at least one of polyester resin C and polycarbonate resin D and a domain formed of polyester resin A in the matrix.

Method for manufacturing electrophotographic photoreceptor

Abstract: This invention provides a method for manufacturing an electrophotographic photoreceptor that can optimize the surface shape of an electrophotographic photoreceptor for cleaning property improvement purposes. This method comprises bringing the surface of an electrophotographic photoreceptor, comprising at least a charge transport layer provided on a cylindrical support, into pressure contact with a mold having fine surface irregularities to transfer the fine surface irregularities onto the surface of the electrophotographic photoreceptor. The temperatures of the mold and the support are controlled so as to satisfy a requirement of T3 < T1 < T2 wherein T1 represents the glass transition temperature of the charge transport layer, oC; T2 represents the temperature of the mold, oC; and T3 represents the temperature of the support, oC.

Electrophotographic photoreceptor, processing cartridge, electrophotographic apparatus and method for manufacturing electrophotographic photoreceptor

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having largely improved wear resistance, with respect to an electrophotographic photoreceptor manufactured by using a radiation polymerization reaction, and to provide a method of manufacturing the electrophotographic photoreceptor, a process cartridge and an electrophotographic apparatus each having the electrophotographic photoreceptor. SOLUTION: In the electrophotographic photoreceptor having a photosensitive layer, or the photosensitive layer and a protective layer, on a support, the photosensitive layer or one or more layers of the protective layer are formed by irradiation with radioactive ray, and the electrophotographic photoreceptor is manufactured in such a way that the temperature of an electrophotographic photoreceptor at the time of start of irradiation or during irradiation with radioactive ray becomes 50-250°C. In addition, an electrophotographic photoreceptor formed by performing irradiation with radioactive ray within a certain temperature range, a process cartridge and an electrophotographic apparatus each having this electrophotographic photoreceptor, and a method of manufacturing this electrophotographic photoreceptor are also provided. COPYRIGHT: (C)2004,JPO&NCIPI

Electrophotographic photoreceptor, and process cartridge and electrophotographic device having the electrophotographic photoreceptor

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor, capable of improving wear resistance and scratch resistance significantly by increasing the film strength, having high sensitivity, hardly causing the change or deterioration of photoreceptor characteristics such as increase in the residual potential during repeated use, and having stable performance even during repeated use. SOLUTION: The electrophotographic photoreceptor has a photosensitive layer, containing a polymerized product of a hole transfer compound having two or more chain polymerizable functional groups in one molecule and containing at least one kind of halogen compound expressed by the following formula (1) or (2). In formulae (1) and (2), each of R1 to R3 is a hydrogen atom, halogen atom, alkyl group which may have substitutents, alkoxy group which may have substituents, aryloxy group which may have substituents, aralkyl group which may have substituents or aryl group which may have substituents, Ar1 is an aryl group which may have substituents, and each of X1 and X2 is a halogen atom.

Method for preparing electrophotographic photosensitive member

Abstract: A method for preparing in high productivity and stably an electrophotographic photosensitive member having depressed portions on its surface, is provided. The method is characterized in that a coating liquid for a surface layer which includes a solvent including a hydrophilic solvent and a hydrophobic solvent and a polymer compound soluble in the hydrophobic solvent is used; the hydrophilic solvent has a boiling point equal to or higher than that of the hydrophobic solvent; the hydrophilic solvent has a dipole moment of 0 or more and less than 2.8, obtained by a structure optimized calculation using a semiempirical molecular orbital calculation; the total mass of the hydrophobic solvent is 50 mass % or more and less than 100 mass % of the total mass of the solvent included in the coating liquid for a surface layer; and after the coating liquid for a surface layer is applied, the depressed portions are formed by condensation on the surface on which the coating liquid for a surface layer is applied.

Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus

Abstract: An electrophotographic photosensitive member capable of persistently exerting an effect of mitigating contact stress with contact members and excellent also in potential stability during repeated use is provided, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member are provided. The charge transport layer serving as a surface layer of the electrophotographic photosensitive member contains a charge transporting material, polyester resin A containing a siloxane moiety and at least one of polyester resin C and polycarbonate resin D. The content of a siloxane moiety in polyester resin A is not less than 10% by mass and not more than 40% by mass relative to the total mass of polyester resin A. The charge transport layer has a matrix-domain structure having a matrix formed of the charge transporting material and at least one of polyester resin C and polycarbonate resin D and a domain formed of polyester resin A in the matrix.

Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

Abstract: 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.

Materials for electronic devices

Abstract: The present invention relates to an electronic device comprising anode, cathode and at least one organic layer which comprises a compound of the formula (I) to (IV). The invention furthermore encompasses the use of compounds of the formula (I) to (IV) in an electronic device and to a compound of the formula (Ic) to (IVc).

Photoconductive imaging members

Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of a charge transport component or components, a polymer binder and metal oxide particles, wherein said metal oxide particles contain or are attached with or to a silane or a siloxane, or alternatively a polytetrafluoroethylene.

Toner and image forming method

Abstract: A toner suitable for use in an image forming method including a contact charging step is provided. The toner includes: toner particles comprising at least a binder resin and a colorant, and fine particles. The fine particles comprise: (i) a tungsten-containing tin oxide, or (ii) base particles, and a tungsten-containing tin compound coating the base particles, the fine particles contain tin (Sn) in a weight ratio (Sn/b) of 0.01 to 2.0 with respect to the base particles (B). In the fine particles, tungsten (W) is contained in a mol ratio (W/Sn) of 0.001 to 0.3 with respect to the tin (Sn).