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Developer, developer storage body, developing device and image forming apparatus

A technology of developer and binder resin, which is applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., which can solve the problem of difficult inclusion and yellow color change of toner image problems such as low

Active Publication Date: 2018-02-06
OKI ELECTRIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General bright pigments have a diameter of 5-10 μm and are not easily contained in toner particles
The yellow tint of the toner image becomes lower due to the increase in the proportion of toner particles that do not contain bright toner

Method used

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  • Developer, developer storage body, developing device and image forming apparatus
  • Developer, developer storage body, developing device and image forming apparatus
  • Developer, developer storage body, developing device and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] First, a pigment dispersion liquid is prepared. 1.60 parts by weight of the first dispersant "SOLSPERS 39000" (manufactured by Japan Lubrizol Corporation) and 0.40 parts by weight of the second dispersant "SOLSPERS 22000" (manufactured by Japan Lubrizol Corporation) were dissolved in 86.57 parts by weight of dispersant as an organic solvent medium (ethyl acetate). To the resulting medium, 10.00 parts by weight of a yellow pigment "C.I. Pigment Yellow 180" and 1.43 parts by weight of a magenta pigment "C.I. Pigment Red 122" were added and subjected to dispersion treatment.

[0067]Dispersion treatment was performed using a batch-type off-the-shelf mill disperser (manufactured by PRIMIX Corporation). The disperser has a cylindrical vessel with rotating plates. Place media, pigments, and zirconia microbeads into a cylindrical container and stir. The bead diameter was 0.3 mm, and the bead filling rate was 55%. The pre-dispersion treatment was performed at a dispersion s...

example 2

[0080] The toner of Example 2 was produced in the same manner as the toner of Example 1 except for the classification conditions of the toner mother particles. The toner mother particles were classified by setting the distance from the Coanda block 71 to the tip of the F edge 72 to 17.0 mm, the distance from the Coanda block 71 to the tip of the M edge 73 to 22.0 mm, and Collect intermediate size powder 83 for execution.

[0081] The number average particle diameter of the toner mother particles of Example 2 was 8.501 μm. The number ratio of toner particles having a particle diameter in the range of 4 to 6 μm measured based on the particle diameter distribution (ie, number diameter distribution) was 2.2%.

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PUM

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Abstract

The invention relates to a developer, a developer storage body, a developing device and an image forming apparatus. The developer including developer particles. Each developer particle includes a binder resin, a brilliant pigment whose principal component is aluminum, a yellow pigment, a magenta pigment, a reddish-orange fluorescent dye, and a yellow fluorescent dye. When an average particle diameter of the brilliant pigments included in the developer particles is expressed as D ([mu]m), a number proportion of the developer particles having particle diameters in a range from 4 [mu]m to 1.2*D [mu]m in the whole developer particles is less than or equal to 4%.

Description

technical field [0001] The present invention relates to a developer for electrophotographic image formation, a developer storage body, a developing device, and an image forming apparatus. Background technique [0002] In general, a technique of forming an image by electrophotography using yellow, magenta, cyan, and black toners (developers) is widely used. Recently, there is a demand to form an image using a glossy toner such as a gold toner or a silver toner having a gloss. See, eg, Japanese Patent Application Publication No. 2009-143092 (Abstract). [0003] Brilliant toners (for example, golden toners) include various pigments such as radiant pigments. General brilliant pigments have a diameter of 5-10 μm, and are not easily contained in toner particles. Since the proportion of toner particles not containing the glossy toner increases, the yellow tone of the toner image becomes lower. Therefore, for example, the color tone of the toner image printed in the final stage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
CPCG03G9/08G03G9/0812G03G9/0817G03G9/0819G03G9/09G03G9/0902G03G9/0926G03G9/0821G03G9/08755G03G15/0858G03G21/1807G03G21/1814G03G2215/0888
Inventor 平出麻苗美
Owner OKI ELECTRIC IND CO LTD
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