Electrophotographic image forming method

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...

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.

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