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Resin-coated carrier and preparation method therefor, and bi-component developing agent

A resin coating, carrier technology, applied in the development agent, electrography, optics, etc., can solve the problems of durability, insufficient carrier adhesion inhibition, toner charge fluctuation, uneven distribution, etc., to reduce the carrier Adhesion, excellent effect, good fluidity effect

Inactive Publication Date: 2016-03-02
HUBEI DINGLONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The resin-coated carriers disclosed in the above-mentioned Patent Documents 1 to 3 contain silicone resin, acrylic resin or similar structures in the coating layer, but the durability and carrier adhesion suppression are insufficient.
With regard to durability, there are the following problems: uneven distribution of silicone resin and acrylic resin in the coating layer on the surface of the magnetic core material, or uneven curing, will cause fluctuations in the amount of charge imparted to the toner by the carrier, resulting in mottled images and in-machine damage. pollution phenomenon

Method used

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  • Resin-coated carrier and preparation method therefor, and bi-component developing agent
  • Resin-coated carrier and preparation method therefor, and bi-component developing agent
  • Resin-coated carrier and preparation method therefor, and bi-component developing agent

Examples

Experimental program
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Effect test

preparation example Construction

[0042] Preparation of resin-coated carrier 1

[0043] Coating Dispersion Formula:

[0044] Silane coupling agent (solid content 98wt%, OFS-6020: American DowCorning): 10 parts

[0045] Silicone resin solution (solid content 70wt%, KR251: Japan ShinEtsu): 86 parts

[0046] Acrylic resin solution (solid content 60wt%, PMMA: Mw=8*10 4 ): 50 copies

[0047] Conductive carbon black (model: VXC72, manufacturer: American CABOT): 8 parts

[0048] Silica particles (surface treated with polydimethylsiloxane, number average primary particle size 160nm): 1 part

[0049] Toluene: 640 parts

[0050] Weigh and mix each component according to the above formula, and disperse for 15 minutes using a high-speed disperser (model: T18, manufacturer: IKA, Germany) to obtain a coating layer dispersion. Get 12 parts of coating layer dispersion liquid and drop into 100 parts of magnetic core material (volume median diameter D 50 : 36 μm, saturation magnetization: 76 emu / g), coating on a kneader ...

Embodiment 1～12

[0181] The above-mentioned "resin-coated carriers 1-12" and "toner" were mixed in the following manner to prepare the two-component "developers 1-12" of the example. 93 parts of carrier and 7 parts of toner were mixed in a mixer for 10 minutes to prepare a two-component developer.

Embodiment 13

[0188] Mix 7 parts each of yellow toner, magenta toner, cyan toner, and black toner with 93 parts of resin-coated carrier 1 respectively, and mix each in a mixer for 10 minutes to prepare a 4-color double-pack Separate developer. At the same time, yellow toner, magenta toner, cyan toner, and black toner are used as supplementary developers.

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Abstract

The invention provides a resin-coated carrier and a preparation method for the carrier, and a bi-component developing agent. The preparation method for the carrier comprises the steps of 1) a mixing process: adding a magnetic core material and coating layer dispersion liquid into a mixing apparatus for mixing, and then removing solvent to enable bonding resin, conductive particles and additive particles in the coating layer dispersion liquid to be adhered to the surface of the magnetic core material; 2) a film-forming process: heating and stirring the materials obtained in the step 1) to enable the bonding resin to be cured and film-formed on the surface of the magnetic core material to form a coating layer including the bonding resin, the conductive particles and the additive particles; and 3) a post-processing process: performing crushing, screening and magnetic selecting on the material obtained in the step 2) to obtain the resin-coated carrier. The resin-coated carrier prepared by the preparation method is high in mobility; the color matching agent is endowed with stable carried charge; and the bi-component developing agent formed by the color matching agent is high in durability.

Description

technical field [0001] The invention relates to a resin-coated carrier in the field of electrostatic charge image development, a preparation method thereof, and a two-component developer containing the resin-coated carrier. Background technique [0002] Along with the high speed and miniaturization of electrostatic image forming devices, the impact between the carrier and the toner in the developing chamber is becoming more and more intense. With the long-term continuous friction between the carrier and the toner, the heat generated is easy to make the toner Adhering to the surface of the carrier leads to the failure of the toner, and further, it brings about a decrease in image density, mottled images, and internal pollution. In order to prevent the failure of the toner, the surface of the magnetic core material is usually coated with a low surface energy resin, such as fluororesin and silicone resin, to prolong the life of the carrier. [0003] Patent Documents 1 to 3 are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087G03G9/107G03G9/113
Inventor 朱顺全黎文部
Owner HUBEI DINGLONG CO LTD
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