Production method for toner

A manufacturing method and toner technology, which can be applied in the fields of developer, electrography, optics, etc., can solve the problems of uneven distribution of particle charge amount, pollution of machines and environment, poor fluidity of toner, etc., to avoid unpleasant charging. The effect of uniformity, reducing waste toner and improving print quality

Inactive Publication Date: 2011-07-06
ICMI CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The toner produced by this method is pulverized by mechanical force, and the outer surface of the toner particles is irregular in shape, and the toner obtained by directly adding external additives after fine pulverization has uneven particle charge distribution. Uniformity, poor toner fluidity during the development process, a lot of waste powder, low transfer rate, external additives are easy to fall off, resulting in toner flying, polluting machines and the environment and other defects

Method used

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  • Production method for toner
  • Production method for toner
  • Production method for toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 100.0 parts by weight of styrene-acrylic resin

[0036] Carbon black 8.0 parts by weight

[0037] Charge modifier 2.0 parts by weight

[0038] 2.0 parts by weight of polypropylene wax

[0039] Put the above raw materials into the Henschel mixer for mixing, melt and mix them through a twin-screw extruder, cool and coarsely pulverize them, and then pulverize and classify them through a jet mill, so that the median diameter of the particles is 7.2 microns, the sphericity is 0.915, and 0.4% of the particle size is added Silica with a median diameter of 15 nanometers is mixed evenly, and heat treatment for spheroidization is carried out by using a hot air flow as a heating medium. The temperature of the hot air flow is 280°C, and the heat treatment time is 1 to 10 seconds. The diameter is 7.1 microns, the sphericity is 0.960, and the yield is 97%. Add 0.8% silicon dioxide and 0.2% titanium dioxide to obtain a black toner. After printing 2000 pages on the HP2600 printer, t...

Embodiment 2

[0041] 100.0 parts by weight of polyester resin

[0042] Pigment C.I. Pigment Blue 15-3 4.0 parts by weight

[0043] Charge regulator (CCA) E-84 2.0 parts by weight

[0044] 1.0 parts by weight of polypropylene wax

[0045] Put the above raw materials into a Henschel mixer for mixing, melt and mix through a twin-screw extruder, cool and coarsely pulverize, and pulverize and classify through a jet mill, so that the particle size is 7.0 microns in diameter, sphericity is 0.910, and 5% of the particle size is added Silica with a median diameter of 10 nanometers is mixed evenly, and heat treatment is carried out by using hot air as the heating medium for spheroidization. The temperature of the hot air is 250°C, and the heat treatment time is 1 to 10 seconds. The blue toner basic particles obtained are medium in size. The diameter is 6.8 microns, the sphericity is 0.960, and the yield is 96%, and 0.8% silicon dioxide is added to obtain a blue toner. Print 2000 pages on the HP260...

Embodiment 3

[0047] 100.0 parts by weight of polyester resin

[0048] Pigment C.I. Pigment yellow 17 4.0 parts by weight

[0049] Charge modifier E-84 2.0 parts by weight

[0050]Palm wax (Carnauba Wax) 1.0 parts by weight

[0051] Put the above raw materials into the Henschel mixer for mixing, melt and mix them through a twin-screw extruder, cool and coarsely pulverize, and pulverize and classify through a jet mill, so that the median diameter of the particles is 7.5 microns, the sphericity is 0.925, and 0.1% of the particle size is added Silica with a median diameter of 30 nanometers is mixed evenly, and hot water is used as the heating medium for spheroidization heat treatment. The temperature of the hot water is 80°C, and the spheroidization heat treatment time is 1 to 10 minutes. The yellow toner basic particles obtained are The median diameter of the particle size is 7.2 microns, the sphericity is 0.965, and the yield is 97%. Add 0.8% silicon dioxide and 0.2% titanium dioxide to ob...

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Abstract

The invention discloses a production method for toners. The method comprises the following steps: obtaining micron-class toner powder, adding nanometer-class silicon dioxide in the micron-class toner powders; carrying out sphericized heat treatment on the toner powder added with silicon dioxide, adding and mixing additive in the sphericized toner powder after sphericized heat treatment, and screening and obtaining the toner. The toner produced by adopting the method has more uniformly distributed electric quantity, the flowing characteristic of the toner in the developing process can be improved, the waste powder quantity is reduced, the transfer printing rate is improved, the printing quality is obviously improved, and pollution can not be generated to machines and environment.

Description

technical field [0001] The present invention relates to a method for producing toner. Background technique [0002] At present, the traditional mechanical method of producing toner (also called "toner") mainly has the following steps: 1) raw material mixing, 2) mixing and extrusion, 3) coarse crushing, 4) mechanical force (such as airflow) micro Grinding, 5) adding external additives and mixing, 6) sieving to obtain the finished product. The toner produced by this method is pulverized by mechanical force, and the outer surface of the toner particles is irregular in shape, and the toner obtained by directly adding external additives after fine pulverization has uneven particle charge distribution. Uniformity, poor toner fluidity during the development process, a lot of waste toner, low transfer rate, external additives are easy to fall off, resulting in toner flying, polluting machines and the environment and other defects. Contents of the invention [0003] The purpose o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
CPCG03G9/08G03G9/09725G03G9/0815G03G9/0827
Inventor 汤付根任群
Owner ICMI CHINA
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