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JP6794631B2 |
An electrophotographic photoreceptor includes a conductive substrate, an organic photosensitive layer on the conductive substrate, and an inorganic protective layer on the organic photosensitive layer. A layer that constitutes a surface ...
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JP6794665B2 |
An image forming apparatus includes: an electrophotographic photoreceptor that includes an electroconductive substrate, an undercoat layer which is provided on the electroconductive substrate and has electrostatic capacitance per unit ar...
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JP2020190649A |
To remove foreign matter from a coating liquid for charge transport layer in manufacturing an electrophotographic photoreceptor, and then to provide a process cartridge having the obtained electrophotographic photoreceptor.A coating liqu...
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JP6789686B2 |
To provide an electrophotographic photoreceptor capable of inhibiting a ghost image while retaining good sensitivity.The electrophotographic photoreceptor comprises a substrate, an intermediate layer on the substrate, and a photosensitiv...
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JP6789617B2 |
A method for producing a carboxylic acid anhydride includes heating a composition containing a specific compound in a solvent to yield the carboxylic acid anhydride. The solvent is an aprotic polar solvent having a boiling point of 50° ...
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JP6786994B2 |
An electrophotographic photoreceptor includes a conductive substrate and a single-layer-type photosensitive layer on the conductive substrate. The single-layer-type photosensitive layer contains a binder resin, a charge generating materi...
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JP6786949B2 |
An electrophotographic photosensitive member includes a conductive base, and a single-layer photosensitive layer disposed directly on the conductive base and containing a charge generation material. A difference between a work function o...
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JP6784231B2 |
To provide an image forming apparatus that can achieve both improvement of resistance of toner against heat stress and improvement of cleaning performance of the toner.An image forming apparatus comprises image carriers and contains deve...
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JP6784288B2 |
The invention relates to an electrophotographic photoreceptor which is excellent in abrasion resistance and electrical properties by using a fluororesin and a polymer containing a structure represented by a specific formula, and has a lo...
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JP6784238B2 |
To provide an electrophotographic photoreceptor that can prevent the occurrence of a ghost image in a formed image.A photosensitive layer 3 included in an electrophotographic photoreceptor 1 contains a charge generating agent, a hole tra...
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JP2020181014A |
To provide an electrophotographic photoreceptor that is excellent in wear resistance and can prevent the occurrence of an image defect caused by light exposure and an image defect caused by contact with a member provided in an image form...
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JP2020181011A |
To provide an electrophotographic photoreceptor that is excellent in wear resistance and can prevent passing of toner and the like at a contact part with a cleaning blade.A binder resin contained in a photosensitive layer of an electroph...
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JP2020181054A |
To eliminate manufacturing variation when producing multiple electrophotographic photoreceptors at a time.Difference in temperature at the central position in the longitudinal direction of support bodies is kept at 0.5°C or less during ...
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JP2020181074A |
To provide a holder for electrophotographic photoreceptor that increases the fixation to an electrophotographic photoreceptor and can prevent the occurrence of printing failure, and an image forming apparatus.A holder for electrophotogra...
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JP2020181108A |
To provide a cylindrical work retainer capable of retaining a cylindrical work in a non-contact state.The cylindrical work retainer has a suction block. The suction block has a suction surface facing the surface of a cylindrical work. Th...
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JP6780480B2 |
The photoconductor includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is a polymer of a radical-polymerizable composition containing a perfluoropolyether compound including a radical-polym...
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JP6781588B2 |
To provide, with regard to an electrophotographic photoreceptor having a support medium and a photosensitive layer on the support medium, a method of manufacturing an electrophotographic photoreceptor and an electrophotographic photorece...
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JP6779609B2 |
An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal represented by formula (1) in which at least one organic c...
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JP6781396B2 |
where each of R1 and R2 independently represents an alkyl group or an aromatic hydrocarbon group.
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JP2020177083A |
To provide a method of manufacturing an electrophotographic photoreceptor which suppresses excessive initial wear speed of the photoreceptor and curling up of a cleaning blade.A method of manufacturing an electrophotographic photorecepto...
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JP6777036B2 |
An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer and contains a charge generating material, a hole transport material...
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JP6776789B2 |
To provide an image forming method with which a photoreceptor has sufficient cleanability even when a protective layer is worn away, regardless of the use of a lubricant to be applied to the photoreceptor.An image forming method in an el...
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JP2020171877A |
To provide a washing method of a substrate capable of washing sufficiently a metal soap adhering onto the substrate, while suppressing corrosion of the substrate.A washing method of a substrate includes the first washing step for washing...
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JP6774330B2 |
To provide an electrophotographic photoreceptor which can suppress the occurrence of image abnormality even when used repeatedly many times and is excellent in the durability, and an image formation apparatus using the same.An electropho...
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JP6773127B2 |
A polyarylate resin is represented by general formula (1) shown below. In general formula (1), R, R, R, and Reach represent, independently of one another, a hydrogen atom or a methyl group. r and s each represent an integer of at least 0...
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JP2020170029A |
To provide an electrophotographic photoreceptor capable of forming an image with minimized density unevenness.An electrophotographic photoreceptor comprises: a conductive base material; an undercoat layer, containing inorganic particles ...
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JP6769408B2 |
To provide an electrophotographic photoreceptor that includes a photosensitive layer excellent in oil crack resistance.An electrophotographic photoreceptor 1 comprises a conductive substrate 2 and a photosensitive layer 3. The photosensi...
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JP6769112B2 |
where M is a ratio (ppm) of the methylethyl ketone oxime included in the undercoat layer, and L is an average thickness (μm) of the undercoat layer.
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JP2020166034A |
To provide a resin substrate for electrophotographic photosensitive drum which is small in deflection by a contact pressure of a peripheral member.There is provided a cylindrical resin substrate for electrophotographic photoreceptor, in ...
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JP2020160160A |
To provide an image forming apparatus that is excellent in cleaning maintainability of a secondary transfer member.An image forming apparatus comprises: a toner image forming device that includes a photoreceptor having an outermost surfa...
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JP6763355B2 |
To provide an electrophotographic photoreceptor excellent in transferability of a toner image.An electrophotographic photoreceptor comprises a conductive substrate and a photosensitive layer. The conductive substrate contains aluminum or...
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JP6762799B2 |
To provide an image forming method, process cartridge, and electrophotographic device with which a reduction in image quality due to contamination of a charging member can be suppressed with good cleanability.An electrophotographic photo...
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JP6763354B2 |
To provide a compound that can improve the electrical characteristics of a photoreceptor and prevent crystallization of a photosensitive layer.An electrophotographic photoreceptor 1 comprises a conductive substrate 2 and a photosensitive...
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JP6758417B2 |
The invention relates to an electrophotographic photoreceptor which can suppress occurrence of abnormalities such as peeling or falling off of a film from a substrate end portion in a film formation step of a surface layer and maintain a...
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JP6759949B2 |
Electrophotographic photoreceptor including a conductive substrate, an organic photosensitive layer on an outer peripheral surface of the conductive substrate, and an inorganic protective layer on an outer peripheral surface of the organ...
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JP6759773B2 |
An image forming apparatus includes an electrophotographic photoreceptor having an overcoat layer and a cleaning unit that includes a cleaning blade and a tip of the cleaning blade contacts with the photoreceptor toward the direction opp...
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JP6759588B2 |
To provide a lubricant that, even when images having printing rates largely different from each other in the images are continuously output, can suppress the occurrence of image memory and improves cleanability of an image carrier.A lubr...
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JP6760396B2 |
A polyarylate resin represented by general formula (1). In general formula (1), r represents an integer of 10-70. s represents an integer of 30-90.
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JP6760207B2 |
To provide an electrophotographic photoreceptor that reduces the occurrence of white spots in a formed image.An electrophotographic photoreceptor 100 comprises a conductive substrate 101 and a single-layer photosensitive layer 102. The p...
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JP6760240B2 |
To provide an electrophotographic photoreceptor that prevents the occurrence of transfer memory.An electrophotographic photoreceptor is a single-layer photosensitive layer, and the photosensitive layer contains a charge generating agent,...
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JP6757195B2 |
To provide a photoreceptor that reduces a change in sensitivity even in high temperature and high humidity to low temperature and low humidity and can achieve good image characteristics, and an image forming apparatus including the same....
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JP2020143340A |
To provide an aluminum alloy capable of forming a highly smooth outer surface and capable of suppressing a production cost, a manufacturing method of an aluminum alloy extruded material, a manufacturing method of a photosensitive drum ba...
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JP2020143339A |
To provide an aluminum alloy capable of forming a highly smooth outer surface and capable of suppressing a production cost, a manufacturing method of an aluminum alloy extruded material, a manufacturing method of a photosensitive drum, a...
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JP6753471B2 |
A polyarylate resin includes repeating units represented by general formula (1) and repeating units represented by general formula (2). In general formulae (1) and (2), R1 represents a hydrogen atom or a methyl group. In general formula ...
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JP6753280B2 |
The present invention provides an electrophotographic photoreceptor (10) which is capable of suppressing discharge degradation at the time of roller charging and of forming an excellent image with excellent abrasion resistance, in the ca...
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JP2020140127A |
To solve the problem that an electrophotographic photoreceptor decreases in resolution as the electrophotographic photoreceptor changes in surface state to cause decrease in print quality.A method comprises: performing, when image format...
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JP2020140047A |
To provide an electrophotographic photoreceptor capable of suppressing environmental variation during repeated use.An electrophotographic photoreceptor with a support body and a photosensitive layer provided herein has a protective layer...
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JP2020140022A |
To provide an image forming apparatus that can restrict the occurrence of a streak-like charging unevenness image and form a high-quality image for a long period.An image forming apparatus comprises: at least an electrophotographic photo...
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JP2020140131A |
To provide a manufacturing method of electronic photographic photoreceptor capable of detecting defects on an electronic photographic photoreceptor without destruction with high accuracy.The manufacturing method of electronic photographi...
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JP2020140126A |
To provide an electro-photographic device which suppresses generation of charged lateral stripes and generation of black spots even when repeatedly used for a long period under a low-temperature low-humidity environment and is excellent ...
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