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Toner for black and white laser printers

A laser printer and toner technology, applied in the field of toner, can solve the problems of low printing quality, low production cost, and high production cost, and achieve the effects of improving printing quality, increasing charging capacity, and reducing office costs

Inactive Publication Date: 2011-11-23
HEBEI FENGHUA HEAVY MECHANICAL & ELECTRICAL EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spherical toner produced by the chemical method has a printing blackness of about 1.45, and the printing quality is good, but the production cost is high and the price is expensive, resulting in high office costs.
The toner produced by the physical pulverization method has low production cost, but the frictional electrification is poor. Due to insufficient charge, the printing blackness is generally around 1.3, resulting in low printing quality and cannot meet user needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh the following raw materials:

[0023] 580g of styrene-acrylic resin, 430g of magnetic iron oxide, 10g of polypropylene wax, 30g of E81, 10g of strontium dioxide, and 2g of fumed silica.

[0024] (1) Mix 580g of styrene-acrylic resin, 430g of magnetic iron oxide, 10g of polypropylene wax, 30g of E81 and 6g of strontium dioxide in a low-speed mixer according to the proportion, and mix for 3 to 5 minutes each time. After the mixing is completed, it is introduced into the kneader, kneaded at 100-130 ° C, extruded, placed, and cooled.

[0025] ⑵ After the material is cooled, use a coarse pulverizer to crush the material into a coarse material with a diameter of 300-500 microns, and then use a jet mill to classify it into a material with a diameter of 8-10 microns.

[0026] (3) Mix the material obtained in step (2) with 2 g of fumed silicon dioxide and 4 g of strontium dioxide in a high-speed mixer, mix 3 times, each time for 1 to 2 minutes, and pass the mixed material...

Embodiment 2

[0036] Weigh the following raw materials:

[0037] 550g of styrene-acrylic resin, 440g of magnetic iron oxide, 5g of polypropylene wax, 20g of E81, 5g of strontium dioxide, and 1.5g of fumed silica.

[0038] (1) Mix 550g of styrene-acrylic resin, 440g of magnetic iron oxide, 5g of polypropylene wax, 20g of E81 and 3g of strontium dioxide in a low-speed mixer according to the proportion, and mix 3 times for 3 to 5 minutes each time. After the mixing is completed, it is introduced into the kneader, kneaded at 100-130 ° C, extruded, placed, and cooled.

[0039] ⑵ After the material is cooled, use a coarse pulverizer to crush the material into a coarse material with a diameter of 300-500 microns, and then use a jet mill to classify it into a material with a diameter of 8-10 microns.

[0040] (3) Mix the material obtained in step (2), 1.5 g of fumed silica and 2 g of strontium dioxide in a high-speed mixer for 3 times, each time for 2 minutes, and pass the mixed material through a...

Embodiment 3

[0043] Weigh the following raw materials:

[0044] 600g of styrene-acrylic resin, 420g of magnetic iron oxide, 15g of polypropylene wax, 40g of E81, 20g of strontium dioxide, and 2.5g of fumed silica.

[0045] (1) Mix 600g of styrene-acrylic resin, 420g of magnetic iron oxide, 15g of polypropylene wax, 40g of E81 and 12g of strontium dioxide in a low-speed mixer according to the proportion, and mix for 5 minutes each time. After the mixing is completed, it is introduced into the kneader, kneaded at 100-130 ° C, extruded, placed, and cooled.

[0046] ⑵ After the material is cooled, use a coarse pulverizer to crush the material into a coarse material with a diameter of 300-500 microns, and then use a jet mill to classify it into a material with a diameter of 8-10 microns.

[0047] (3) Mix the material obtained in step (2), 2.5 g of fumed silica and 8 g of strontium dioxide in a high-speed mixer, mix 3 times, each time for 2 minutes, pass the mixed material through a screen for ...

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PUM

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Abstract

The invention discloses a toner for black and white laser printers, which comprises the following raw materials in parts by weight: 55-60 parts of styrene-acrylic resin, 42-44 parts of magnetic oxide iron, 0.5-1.5 parts of poly propylene wax, 2-4 parts of electric tuning agent E81, 0.5-3 parts of strontium dioxides, and 0.15-0.25 part of fumed silica. In the invention, the toner is produced by using a physical comminution method, and the printing blackness of the toner can reach over 1.4, therefore, the toner disclosed by the invention can replace expensive products so as to satisfy the user needs and then effectively reduce the office cost.

Description

technical field [0001] The invention relates to the technical field of toner, in particular to black and white laser printer toner. Background technique [0002] Toner preparation methods include chemical and physical methods. The spherical toner produced by the chemical method has a printing blackness of about 1.45, and the printing quality is good, but the production cost is high and the price is expensive, resulting in high office costs. The toner produced by the physical pulverization method has low production cost, but its triboelectricity is poor. Due to insufficient charge, the printing blackness is generally around 1.3, resulting in low printing quality and cannot meet user needs. Contents of the invention [0003] The purpose of the present invention is to provide a black and white laser printer toner, the toner has a simple production process, good friction electrification, printing blackness above 1.4, and can effectively meet customer needs. [0004] The pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
Inventor 王军林许兴基张明仿荆晓光
Owner HEBEI FENGHUA HEAVY MECHANICAL & ELECTRICAL EQUIP MFG
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