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Developer for electrostatic latent image development and image forming method

An electrostatic latent image, positively charged technology, applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., can solve the problem of the reduction of toner charge and the scattering of toner , fog and other problems, to achieve the effect of suppressing toner scattering

Active Publication Date: 2013-01-30
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fatty acid metal salt preferably used as lubricant particles is negatively chargeable, when the positively chargeable toner contains the fatty acid metal salt, the charge amount of the toner may decrease.
In addition, fine particles with a particle diameter of 1 μm or less tend to adhere to the surface of the toner, and when a positively chargeable toner is used in combination with fine fatty acid metal salt particles, negatively charged reversely charged toner is generated, which is likely to occur. Image defects such as toner scattering from the developing device, fogging in formed images, etc.

Method used

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  • Developer for electrostatic latent image development and image forming method
  • Developer for electrostatic latent image development and image forming method
  • Developer for electrostatic latent image development and image forming method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0021] A first embodiment of the present invention relates to a developer for developing a positively charged electrostatic latent image (hereinafter also referred to as a developer). The developer for developing a positively chargeable electrostatic latent image according to the first embodiment is a developer for developing a positively chargeable electrostatic latent image used in an image forming apparatus including a latent image bearing portion and a cleaning portion, wherein the latent image The carrier part has at least a photosensitive layer made of amorphous silicon formed on the conductive substrate, the cleaning part has an elastic blade, and the above-mentioned developer for developing a positively chargeable electrostatic latent image contains a positively chargeable toner (hereinafter referred to as known as toner) and a particular kind of fatty acid metal salt with a particular particle size distribution. In addition, the developer for developing a positively c...

no. 2 approach

[0086] A second embodiment of the present invention relates to an image forming method in which an image is formed using the positively chargeable electrostatic latent image developing developer according to the first embodiment in an image forming apparatus including a latent image bearing unit and a cleaning unit. In the image forming method, in the image forming apparatus, the latent image bearing part has a photosensitive layer made of at least amorphous silicon formed on a conductive substrate, and the cleaning part has an elastic blade. Hereinafter, an image forming method according to a second embodiment of the present invention will be described.

[0087] The image forming apparatus used in the image forming method according to the second embodiment is not particularly limited as long as it includes a latent image bearing portion in which a photosensitive layer made of at least amorphous silicon is formed on a conductive substrate, and a cleaning portion having an elast...

preparation example 1

[0120] (Preparation of fatty acid metal salt particles)

[0121] Zinc (II) stearate (SZ-TF (manufactured by Sakai Chemical Co., Ltd.), volume average particle size: 18 μm), hard Calcium stearate (calcium stearate FI (manufactured by NOF Corporation), volume average particle size 12.5 μm), zinc (II) palmitate (manufactured by Mitsuwa Chemicals Co., Ltd.), zinc (II) myristate (manufactured by Mitsu and Magnesium Stearate (manufactured by Taihei Chemical Industry Co., Ltd.) or magnesium stearate (manufactured by Taihei Chemical Industry Co., Ltd.), and the obtained pulverized material was classified with an elbow nozzle classifier (EJ-LABO type (manufactured by Nippon Steel Industries, Ltd.)). The crushing and classification conditions were appropriately adjusted to prepare fatty acid metal salts A to H described in Table 1. For the fatty acid metal salts A to H, the particle size distribution was measured with a particle size distribution analyzer (Malchisa Iza-3 (manufactured ...

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Abstract

The invention provides a developer for electrostatic latent image development. The developer for electrostatic latent image development including a positively chargeable toner and a fatty acid metal salt is used, in which the fatty acid metal salt is a metal salt selected from the group consisting of zinc, calcium, and magnesium salts of fatty acids of 12 to 20 carbon atoms and has a certain volume average particle diameter and particle size distribution. By using the developer for electrostatic latent image development, toner scattering or generation of image defects such as fog in the resulting images can be reduced.

Description

technical field [0001] The present invention relates to a developer for developing a positively charged electrostatic latent image used in an image forming apparatus and an image forming method using the above image forming apparatus, wherein the image forming apparatus has a conductive base formed of at least amorphous silicon. The latent image bearing part of the photosensitive layer and the cleaning part with an elastic blade. Background technique [0002] Generally, in the electrophotography method, after the latent image bearing part made of photoconductive photoreceptor is charged by corona charging or the like, the electrostatic latent image formed by exposing the charged latent image bearing part with laser light, LED, etc., Develop and visualize with a developer such as toner to form a high-quality image. [0003] Conventionally, as a latent image bearing portion used in the image forming method described above, a latent image bearing portion having a photosensitiv...

Claims

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Application Information

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IPC IPC(8): G03G9/08G03G15/00
CPCG03G9/09791G03G9/097G03G5/043G03G9/08G03G15/00
Inventor 辻广昌己中山幸则
Owner KYOCERA DOCUMENT SOLUTIONS INC
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