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Toner coated with thin film

A film coating, toner technology, applied in the direction of developer, electrography, optics, etc., can solve the problem of toner generation, difficult to provide low aggregation tendency (anti-clogging performance, high-speed melting performance, toner, performance Can not be all used and other problems, to achieve the effect of reducing heat energy and time, saving energy and high-speed melting method

Inactive Publication Date: 2007-09-26
TOPPAN MOORE CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, also in polymerized toners, it is generally difficult to provide a toner having both low aggregation tendency (anti-clogging property or low clogging tendency) and high-speed melting property
So while it has high performance, polymerized toner can sometimes cause problems, and its performance can sometimes not be used to its full potential
[0024] Also for polymerized and aggregated toners, it is generally difficult to provide toners having both low aggregation tendency (anti-clogging property or low clogging tendency) and high-speed melting properties
Therefore, although it has high performance, aggregation and aggregation of toner sometimes cause problems, and its performance is sometimes not fully utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0299] Film coating toner 1-1

[0300] A film coating was applied on commercially available black toner 1-1, which is a two-component developer for flash fixing. Black Toner 1-1 has a volume average particle diameter of 8 μm, its softening temperature is 120° C., the binder resin is ester and the colorant is carbon black.

[0301]First, a 25% by mass polyacrylic acid aqueous solution having a solution viscosity of 8,000 mPa·s at 25° C. was dissolved in water to prepare an aqueous medium having a pH of 4.5 and a concentration of 5% by mass. 100 parts by mass of the above-described black toner 1-1 were dispersed in 300 parts by mass of an aqueous medium at room temperature, and 8.2 parts by mass of hexamethylolmelamine prepolymer (produced by Showa Highpolymer Co., Ltd. manufactured; product name: Miruben 607). The resulting room temperature mixture was heated to 70° C. within 20 minutes, and a resinization reaction was performed for 2 hours, thereby coating the surface of Bla...

Embodiment 1-2

[0308] Film coating toner 1-2

[0309] Film coating toner 1-2 was prepared in the same manner as that of film coating toner 1-1 except that commercially available black toner 1 for a one-component developer containing magnetite was used -2 instead of Black Toner 1-1. Film-coated toner 1-2 has particularly good reproducibility during centrifugal deposition, and has the same or better performance than film-coated toner 1-1.

Embodiment 1-3

[0311] Film Coating Toner 1-3

[0312] Film coatings were applied on commercially available black toners 1-3, which are two-component developers for flash fixing. Black Toner 1-3 has a volume average particle diameter of 8 μm, its softening temperature is 70° C., the binder resin is ester and the colorant is carbon black.

[0313] First, 300 parts by mass of 10 mass% ethylene-maleic anhydride copolymer (manufactured by Mosanto; product name: EMA-31), 5 parts by mass of urea, and 0.5 parts by mass of resorcinol were mixed together, using hydrogen oxidation Aqueous sodium solution adjusted the pH to 3.2. Into 300 parts by mass of this solution, 100 parts by mass of Black Toner 1-3 was dispersed at room temperature, and then 12.5 parts by mass of formalin was mixed therein at room temperature. Within 20 minutes, the resulting room temperature mixture was heated to 70° C., and a resinization reaction was performed for 2 hours, thereby coating the surface of Black Toner 1-3 with ...

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Abstract

By coating hot setting resin on the surface of powder toner with a low fusion point, the satisfactory anti-clogging property of the powder toner can be realized, and meanwhile, the softening temperature of the powder toner can be prevented from being increased. When urea resin is used as the hot setting resin or polymeric toner is used as the powder toner, the toner is set under a low temperature and is particularly effective. The use of the surface coating powder toner with a low softening temperature and the following clogging tendency can reduce heat energy and time which are required by fusion, and therefore a method of energy saving and high-speed fusion can be realized.

Description

technical background [0001] The present invention relates to a powder toner coated with a resin film, and particularly to a toner which is fusible at a low temperature. Background technique [0002] In the electrophotographic printing method, some methods for melting or fixing the developer have been proposed and put into practical use, such as a contact melting method using a heat roller or the like, a non-contact melting method such as flash fixing, contact pressure fixing using a pressure roller or the like method and a contact heat press melting method using a heat press roll or the like. [0003] In the thermal fusing method of the fusing or fixing method described above, such as the contact fusing method, the non-contact fusing method and the contact hot-press fusing method, the fusing temperature is mainly determined according to the softening temperature of the toner used. If the softening temperature of the toner is sufficiently low, the melting temperature can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/093G03G9/08
Inventor 江藤桂日暮久乃中山雄介江崎香木村彻
Owner TOPPAN MOORE CO LTD
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