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Developer and its preparing method

A technology of developer and resin, applied in the direction of developer, electrography, optics, etc., can solve the problems of low blackness, low charge, poor fluidity, etc., achieve high blackness, reduce dosage, improve fluidity and belt. The effect of electricity

Inactive Publication Date: 2004-02-11
周学良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor fluidity and low charge, so that the copied documents or images are not only low in blackness and unclear, but also have background dust.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] first embodiment

[0018] Select 75 parts of carbon black, 52 parts of resin, 20 parts of polypropylene wax, 7 parts of charged, 1 part of silicon dioxide, 0.7 parts of phthalocyanine blue, 1 part of azo dye and 8 parts of hard Zinc ester, ready to use. The resin is a binary copolymer resin formed by reacting at the ratio of propylene: butyl acrylate = 4:1.

[0019] Pour carbon black, resin, polypropylene wax\phthalocyanine blue, azo dye and charge into the mixer, and mix evenly to make a mixture;

[0020] Then put the above mixture into the extruder, and extrude the mixture into pieces at a temperature of 95°C;

[0021] Afterwards, the above-mentioned pieces are pulverized into pulverized powder with a particle size of 40 μm with a pulverizer;

[0022] After that, use a pressure of 6kg / m 2 The air is crushed by airflow, and classified by a classifier at 4500 r / min, and the crushed powder with a particle size larger or smaller than 9-10 μm is removed by a trap to ob...

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PUM

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Abstract

The present invention relates to developer and is especially a kind of developer for electrostatic printer and facsimile equipment and its preparation process. The developer is prepared with carbon black 75-90 portions, resin 50-55 portions, polypropylene wax 10-20 portions, charged agent 6-8 portions, SiO2 1-1.5 portions, phthalocyanine blue 0.5-1 portions, azo dye 0.5-1 portions and zinc stearate 5-12 portions, and through mixing, extruding, crushing, sieving and other steps. It has high flowability and great charging amount, and may be used to produce black and clear file and picture copy without back grey.

Description

(1) Technical field [0001] The invention relates to a carbon powder and a preparation method thereof. Specifically, it is a developer for electrostatic copiers and facsimile machines and a preparation method thereof. (2) Background technology [0002] At present, the developers used in copiers and fax machines are mainly made of carbon black, resin, polypropylene wax, charge and silicon dioxide. Moreover, the amount of silica used is relatively large. this developer. Poor fluidity and low charging capacity make the copied documents or images not only have low blackness and unclearness, but also have background dust. (3) Contents of the invention [0003] The object of the present invention is to provide a developer. This kind of developer has good fluidity and high charging capacity. The documents or images copied by it are not only high in blackness and clear, but also free of bottom dust. [0004] Another object of the present invention is to provide a method for pr...

Claims

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Application Information

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IPC IPC(8): G03G9/13
Inventor 周学良
Owner 周学良
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