Electrostatic dry single-component electronegative toner for laser printer

A laser printer, one-component technology, applied in optics, electrical recording, instruments, etc., can solve the problems of image density, image adhesion and fixing firmness that plague toner manufacturers and poor versatility, and achieve excellent performance indicators and reduce Wasteful, high-resolution effects

Inactive Publication Date: 2011-05-18
TIANJIN ZHONGHUAN TIANJIA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electrostatic dry-type single-component negatively charged laser printer toner in the domestic market has poor versatility, and has poor performance in terms of image density, bottom dust, image level, resolution, sticking to drums, fixing, fluidity, environmental adaptability, storage, transportation, etc. On the one hand, it can only meet the basic requirements of the low-end market,

Method used

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  • Electrostatic dry single-component electronegative toner for laser printer
  • Electrostatic dry single-component electronegative toner for laser printer
  • Electrostatic dry single-component electronegative toner for laser printer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019]

[0020] After the above six kinds of raw materials are fully mixed with a high-speed mixer, they are mixed with an extrusion mixer, pressed into tablets, cooled, and then coarsely pulverized, finely pulverized, and then classified by wind to obtain a sub-extreme product with an average particle size of 11.2 μm. , add 0.7g of hydrophobic silicon dioxide treated with siloxane to this extreme product, and mix well to obtain high-quality toner. The image obtained by using this toner on the HP4300 printer has a high image density , High resolution, high image clarity, good fine lines and no sticking, good fixing firmness, and less wear on the photosensitive drum.

Embodiment 2

[0022]

[0023] The above-mentioned five kinds of raw materials are processed in the same way as Example 1, then add 0.72 of hydrophobic silicon dioxide treated with siloxane, and mix well. The image density of the image obtained by using the toner on the HP4300 printer is High, high resolution, high image definition, fine lines, good non-adhesion, good fixing firmness, and little wear on the photosensitive drum.

Embodiment 3

[0025]

[0026] The above five raw materials were processed in the same manner as in Example 1. After obtaining the graded toner, 0.68 g of siloxane-treated hydrophobic silica was added and mixed thoroughly. The image obtained by using the toner on the HP4300 printer has high image density, high resolution, high image definition, fine lines, good non-sticking, good fixation firmness, and little wear on the photosensitive drum.

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Abstract

The invention relates to a magnetic developer, in particular to a toner used for a laser printer, which comprises components such as an adhesive resin, a magnetic material, a charge controlling agent, an internal additive and an external additive, wherein the main component adhesive resin adopts a styrene-butyl acrylate-butyl maleate terpolymer with the polymerization rate of 60:30:10, the melt index MI of 1.6 to 2.6 and the varnish viscosity of 140 to 380 CP; and the magnetic material adopts iron oxide or ferrite, and has the average particle size of 0.1 to 5 mu m, the coercive force of 20 to 1500 e, the saturation magnetization of 50 to 200 emv/g and the bulk density of 1.0 to 1.6 g/cm<3>. Novel schemes for material selection and proportioning are provided by the invention, and iron phthalocyanine is added. The toner produced by the invention ensures high image concentration, high resolution, high image definition, high fineness and non-adhesion of lines, non-adhesion to a fuser film and less abrasion to a photosensitive drum when used for the high-speed laser printer, and is particularly applied to the filling of a reusable cartridge of the high-speed laser printer.

Description

technical field [0001] The invention relates to a magnetic developer, in particular to an electrostatic dry single-component negatively charged laser printer toner. Background technique [0002] In the existing developer manufacturing technology, most of the toners produced are only suitable for various electrostatic copiers and medium and low speed laser printers. Among the dry toners commonly used in electrostatic copiers and medium and low-speed laser printers, there are two-component toners containing carriers and single-component toners that contain magnetic components. The single-component magnetic toner simplifies the development process. Devices are widely used, and there are many patent documents and scientific literature in this regard. In recent years, the international office automation market has successively introduced new high-speed laser printers such as ceramic fast fixing and IH conduction fast fixing, which reduce the fixing temperature and increase the p...

Claims

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Application Information

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IPC IPC(8): G03G9/097
Inventor 姜真韩立胜王金平李美英张明熠
Owner TIANJIN ZHONGHUAN TIANJIA ELECTRONICS
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