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Manufacturing method of carrier for electrostatic image developer

A technology for developing and manufacturing electrostatic images, which is applied in the directions of developer, electro-recording, optics, etc., and can solve the problems of unsatisfactory carrier durability, unsatisfactory results, and shedding of coating resin. Ease of market application, suppression of resistance and charge reduction, and low production costs

Active Publication Date: 2013-06-19
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of improving the durability of the carrier, the carrier coating needs to have strong mechanical strength, impact resistance, wear resistance, and more importantly, good adhesion to the surface of the carrier core material, because cracks or wear are only Local defects, but the overall shedding of the coating resin due to poor adhesion will lead to serious consequences, and may even cause carrier failure
Although the use of a coupling agent can improve the adhesion of the resin to the surface of the carrier core material to a certain extent, there is still only physical adhesion between the resin and the carrier core material, and the durability of the carrier still cannot reach the ideal goal
[0006] It has been reported that the resin is directly polymerized on the surface of the core material through an interfacial reaction in order to improve the adhesion of the resin to the carrier core material, but the results are not very satisfactory, and it is difficult to obtain a uniform coating layer

Method used

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  • Manufacturing method of carrier for electrostatic image developer
  • Manufacturing method of carrier for electrostatic image developer
  • Manufacturing method of carrier for electrostatic image developer

Examples

Experimental program
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Effect test

Embodiment 1

[0034]

[0035] 745g Fe 2 o 3 , 218 g Mn 3 o 4 , 24g MgO, 13g SrO are used as the raw material of the carrier core material, dispersed in 820g water, and ground with a ball mill to obtain a mixed slurry of the above substances, in addition, 10g polyacrylic acid is added as a dispersant, and 30g PVA-1788 solution is added as a binding agent agent. The slurry is sprayed into hot air at 250° C. with an airflow or centrifugal spray dryer to obtain dry particles with a particle size of 10-200 μm. The particles were put into an electric furnace and calcined at 800° C. for 2 hours, and the calcined powder was ground again by a ball mill into a slurry of small particles with an average particle diameter of 1 μm. Add the binder PVA, the dispersant polyacrylic acid (the addition amount is the same as above) and spray granulate again with a spray dryer to obtain dry particles with a particle size of 10-200um, and carry out sieving and classification to remove coarse and fine partic...

Embodiment 2

[0042] Except changing the silicone resin of 2 parts by mass into a mixture of 1 part by mass of silicone resin and 1 part by mass of styrene-methyl methacrylate resin, other conditions are basically the same as in Example 1, and the volume average particle diameter obtained is 37.1 μm The carrier particle 2 of Example 2.

Embodiment 3

[0044] Except changing the silicone resin of 2 mass parts into a mixture of 0.4 mass parts of silicone resin and 1.6 mass parts of styrene-methyl methacrylate resin, other conditions are basically the same as in Example 1, and the volume average particle diameter obtained is 37.4 μm Carrier Particle 3 of Example 3.

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Abstract

The invention relates to a manufacturing method of a carrier for an electrostatic image developer, which solves the problems that the existing carrier for an electrostatic image developer has low durability and low adhesion with a coating layer, easily drops and influences the performance of the electrostatic image developer. The method comprises the following steps of: performing hydroxyl enrichment processing on the surface of a carrier core material; and then coating the carrier core material with a coating layer including organic silicon resin so that a condensation reaction is generated between the organic silicon resin and the hydroxyl on the surface of the core material to obtain a carrier coated by the chemical bonding effect. The method provided by the invention has simple technology and low production cost; the coating layer of the carrier manufactured by the method is impact resistant and wear resistant and has great adhesion with the surface of the carrier core material; and the carrier has good durability.

Description

technical field [0001] The invention relates to the field of developer manufacture, in particular to a method for manufacturing a carrier for electrostatic image developer. Background technique [0002] The method of informatizing an image through an electrostatic latent image, such as developing an electrostatic image, has been widely used in various fields at present. In electrostatic image development technology, the electrostatic latent image formed on the photoreceptor through charging and exposure processes is developed by a developer containing toner, and then through the transfer process and fixing process to achieve the purpose of image information visualization. The developer used for electrostatic development includes a two-component developer containing toner and a carrier and a one-component developer containing only toner. The carrier in the two-component developer, on the one hand, imparts the required charge to the toner, and on the other hand, bears the rol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/113G03G9/08
Inventor 朱顺全刘敏兰泽冠喻家赓
Owner HUBEI DINGLONG CO LTD
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