Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrophotographic image forming method

An electrophotographic and image technology, which is applied in the direction of an electric recording process using a charge pattern, an electric recording process applying a charge pattern, an equipment for an electric recording process applying a charge pattern, etc. High hardness, scraper wear and other problems, to achieve the effect of stable image density, increased penetration force, and small scraper wear

Pending Publication Date: 2020-08-18
KONICA MINOLTA INC
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since titanium dioxide particles have low electrical resistance, there is a problem that when they are transferred to carrier particles during high-coverage printing, the charge transfer of the carrier particles is promoted and the charge amount of the toner decreases.
[0007] In an electrophotographic image forming apparatus, after the toner is developed on the photoreceptor and transferred to the recording medium, the toner remaining on the surface of the transferred photoreceptor is removed by the cleaning member of the image forming apparatus. However, at this time, if the external additive is easily released from the toner, in the case of continuously printing an image with a high coverage, the photoreceptor, the abrasion of the scraper, and the Scratching, as a result, poor cleaning sometimes occurs
In particular, since alumina has a high Mohs hardness, wear and scratches on photoreceptors and scrapers due to free alumina external additives are prone to occur.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrophotographic image forming method
  • Electrophotographic image forming method
  • Electrophotographic image forming method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0229] There is no particular limitation on the preparation method of the coating liquid for forming a protective layer. A polymerizable monomer, an inorganic filler, and optionally used polymerization initiators and other components can be added to a dispersion medium, and stirred until dissolved or dispersed.

[0230] The protective layer can be formed by drying and curing the protective layer-forming coating liquid prepared by the above method after applying it on the photosensitive layer.

[0231] In the above-mentioned coating, drying, and curing processes, the reaction between polymerizable monomers, and in the case where the inorganic filler has a polymerizable group, the reaction between the polymerizable monomer and the inorganic filler, and the reaction between the inorganic filler The reaction and the like proceed, and a protective layer including a cured product of the composition for protective layer formation is formed.

[0232] The coating method of the coating ...

Embodiment

[0314] Hereinafter, although an Example is given and this invention is concretely demonstrated, this invention is not limited to these Examples. It should be noted that in the following examples, unless otherwise specified, operations were performed at room temperature (25° C.). In addition, unless otherwise specified, "%" and "part" mean "mass%" and "mass part", respectively.

[0315]

[0316] use Figure 5 The fabrication device shown in , fabricated on barium sulfate (BaSO 4 ) The surface of the core material (nucleus) is formed with tin oxide (SnO 2 ) of the coating layer (shell) of the composite particles. It should be noted that the composite particles are represented as "SnO 2 / BaSO 4 ".

[0317] Concretely, drop into pure water 3500cm in the mother liquor tank 41 3 , and then throw in 900 g of spherical barium sulfate core materials with an average primary particle diameter of 95 nm, and make it circulate 5 times. The flow velocity of the slurry that flows ou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

An aim of the present invention is to provide an electrophotographic image forming method that suppresses variation in the amount of charge of a toner, stabilizes the density of a formed image, suppresses the occurrence of nebula, has excellent dot reproducibility, has little photoreceptor wear and blade wear, and is capable of suppressing image defects. Provided is an electrophotographic image forming method containing a charging step, an exposure step, a developing step, a transfer step and a cleaning step by using a photoreceptor, wherein the charging step has a charging device for chargingthe surface of the photoreceptor; the photoreceptor has a protective layer, the protective layer contains a polymerized cured product of a composition containing a polymerizable monomer and an inorganic filler, a surface of the protective layer has a plurality of convex portions due to protrusion of the inorganic filler; in the developing step, a toner in which alumina particles are externally added to toner mother particles is used, and an average distance R between adjacent convex portions among the plurality of convex portions is set in the range of 100 to 250 nm.

Description

technical field [0001] The present invention relates to an electrophotographic image forming method, and in particular, relates to suppressing fluctuations in the charge amount of toner, stabilizing image density in formed images, suppressing occurrence of fogging, excellent dot reproducibility (dot reproducibility), and wear of a photoreceptor. And / or an electrophotographic image forming method with less blade wear and capable of suppressing image defects. Background technique [0002] Conventionally, in toners for developing electrostatic images (hereinafter also simply referred to as toners), external additives have been added to the surfaces of toner matrix particles from the viewpoint of improving chargeability and fluidity. As the external additive, fine powders of inorganic oxides are generally used, and examples thereof include silica, titania, alumina, and the like. However, although silica particles are effective in improving fluidity, they tend to excessively inc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/147
CPCG03G5/14708G03G5/14704G03G13/00G03G5/14791G03G15/02G03G7/0026
Inventor 﨑村友子高尾弘毅松﨑真优子生田健悟
Owner KONICA MINOLTA INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com