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Fine developer for large format development and preparation method thereof

A developer and large-format technology, applied in the field of fine developer for large-format development and its preparation, can solve the problems of poor uniformity of charge distribution, irregular shape, environmental impact, etc., and achieve uniform distribution of particle size/electrical properties and stable charging , the effect of particle rules

Active Publication Date: 2016-11-23
天津复印技术研究所有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of the polymerization reaction, the obtained resin will remain as unreacted monomers. Therefore, the developer made of this type of resin will produce toxic and pungent gas during use for a long time, which will affect the environment.
At the same time, due to the strong influence of the viscosity of the polymer, the particle size distribution of the manufactured developer is wide and the shape is irregular, resulting in poor uniformity of charge distribution and poor fluidity, etc., affecting the clarity, resolution and level of the copy, etc.

Method used

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  • Fine developer for large format development and preparation method thereof
  • Fine developer for large format development and preparation method thereof
  • Fine developer for large format development and preparation method thereof

Examples

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preparation example Construction

[0032] The preparation method of the above-mentioned fine developer for large-scale development includes the following process: 75-95% by mass of bisphenol A crystalline polyester resin, 2-15% of insulating carbon black, 1-5% of Olefin oligomers, 0.5-5% charge regulator and 0.2-5% charge stabilizer are fully mixed and then added to a twin-screw extruder for high-temperature extrusion and dispersion. Fine developer particles of 6-8 μm are obtained, and then 0.5-5% developer fluidizing agent is mixed and distributed on the surface of the fine developer particles for 3-10 minutes to prepare a fine developer for large-format development.

[0033] The fine developing material particles obtained by the above-mentioned method are regular, fine and uniform up to 6-8 μm, the charged amount is high and stable at 20-30 μc / g, and the fluidity is better than 70%.

Embodiment 1

[0035] Take 9.0kg of bisphenol A crystalline polyester resin (model: TPE-092, produced by Tianjin Institute of Synthetic Materials), 0.15kg of low molecular weight polyethylene (molecular weight 500), 0.7kg of stearic acid surface modified carbon black, 0.1 kg of azo dye charge regulator produced by 1,4-diaminonaphthalene and naphthol AS, and 0.05 kg of calcium stearate charge stabilizer. Put them together into a high-speed mixer and mix for 7.0 minutes at a speed of 1500 rpm. Then carry out high-temperature extrusion dispersion through a twin-screw extruder at a extrusion dispersion temperature of 120° C., and obtain 6.8 μm fine developer particles through crushing and classification. Then take 1.0kg of the above-mentioned 6.8 μm fine developer particles and 5.0g of nano-silica fluidizing agent, 5.0g of nano-sized styrene and methyl acrylate copolymer microparticle fluidizing agent, and mix them at high speed for 5.0 minutes to prepare Large format development of fine develo...

Embodiment 2

[0037] Take 8.8kg of bisphenol A type crystalline polyester resin, 0.18kg of low molecular weight polypropylene (molecular weight 1000), 0.8kg of stearic acid surface modified carbon black, and the couple produced by 1,4-diaminonaphthalene and naphthol AS Nitrogen dye charge regulator 0.16kg, calcium stearate charge stabilizer 0.06kg. Put them together into a high-speed mixer and mix for 7.0 minutes at a speed of 1500 rpm. Then carry out high-temperature extrusion dispersion through a twin-screw extruder at a extrusion dispersion temperature of 130° C., and obtain 7.0 μm fine developer particles through crushing and classification. Then take 1.0kg of the above-mentioned 7.0 μm fine developer particles and 6.0g of nano-silica fluidizing agent, 4.0g of nano-sized styrene and methyl acrylate copolymer microparticle fluidizing agent, and mix them at high speed for 6.0 minutes to prepare Large format development of fine developer materials. The measured performance data are: D50:...

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Abstract

The invention discloses a fine developer for large-format development and a preparation method thereof, which comprises 75-95% by mass of a bisphenol A crystalline polyester resin binder, 2-15% of an inorganic dye, 1-5 % of olefin oligomer, 0.5-5% of charge regulator, 0.2-5% of charge stabilizer, etc. are fully mixed and then added to a twin-screw extruder for high-temperature extrusion dispersion. The extrusion dispersion temperature is 100-150°C. Fine developer particles of 6-8 μm are obtained by pulverization and classification, and then 0.5-5% developer fluidization agent is mixed and distributed on the surface of the fine developer particles to finally produce large-format fine developer materials. The fine developing material particles obtained by the above method are regular, fine and uniform up to 6-8 μm, have high charge and stability at 20-30 μc / g, and good fluidity above 70%.

Description

technical field [0001] The invention relates to a developer and a preparation method thereof, in particular to a fine developer for large-format development and a preparation method thereof. Background technique [0002] Developing materials are key consumable materials for modern office equipment (various types of copiers / printers). Whether it is good or bad will directly determine the quality level of hard copies such as manuscripts and drawings reproduced by office equipment. Especially for all kinds of engineering drawing copiers that copy and output fine lines, the large-format engineering drawings copied and output by them are more demanding than the manuscripts copied and output by ordinary small-format copiers in terms of clarity, resolution, background level and fixing firmness. In order to achieve the above goals, it is necessary to further improve the particle size, shape and distribution uniformity, the stability of the charging performance, the distribution uni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08
Inventor 苏来泉赵跃红赵晓东
Owner 天津复印技术研究所有限公司
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