Toner, developer, toner cartridge, process cartridge, and image forming apparatus

A toner and solvent technology, applied in the field of electrostatic latent image development toners, can solve the problems of poor high temperature storage, poor toner blocking resistance, etc.

Active Publication Date: 2013-01-16
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] Although the technology described in Japanese Patent Laid-Open No. 2006-276064 can prevent the generation of rubbing defects, the amount of solvent contained in the toner is large, resulting in problems such as poor blocking resistance or poor high-temperature storage properties of the toner. Bad question

Method used

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  • Toner, developer, toner cartridge, process cartridge, and image forming apparatus
  • Toner, developer, toner cartridge, process cartridge, and image forming apparatus
  • Toner, developer, toner cartridge, process cartridge, and image forming apparatus

Examples

Experimental program
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Effect test

preparation example Construction

[0163] Examples of catalysts that can be used in the production of crystalline polyester resins include compounds of alkali metals such as sodium or lithium; compounds of alkaline earth metals such as magnesium or calcium; metals such as zinc, manganese, antimony, titanium, tin, zirconium, or germanium compounds; phosphite compounds; phosphate compounds; and amine compounds. Specific examples thereof include sodium acetate, sodium carbonate, lithium acetate, lithium carbonate, calcium acetate, calcium stearate, magnesium acetate, zinc acetate, zinc stearate, zinc naphthenate, zinc chloride, manganese acetate, naphthenic acid Manganese, titanium tetraethoxide, titanium tetrapropoxide, titanium tetraisopropyloxide, titanium tetrabutyloxide, antimony trioxide, triphenylantimony, tributylantimony, tin formate, tin oxalate, tetraphenyl Tin, dibutyltin dichloride, dibutyltin oxide, diphenyltin oxide, zirconium tetrabutoxide, zirconium naphthenate, zirconyl carbonate, zirconyl acetat...

Embodiment 1

[0366] Production of toner particles (1)

[0367] Charge the following ingredients into a 3 L reaction vessel equipped with a thermometer, pH meter and stirrer:

[0368] Ion exchanged water: 400 parts

[0369] Crystalline polyester resin dispersion (1) (20% concentration of crystalline polyester resin): 50 parts

[0370] Non-crystalline polyester resin dispersion (1) (concentration containing non-crystalline polyester resin is 20%): 250 parts

[0371] Anionic surfactant (trade name: NEOGEN RK, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., active ingredient content 60%): 2.5 parts

[0372] While stirring the contents of the reaction vessel at 150 rpm and adjusting the temperature from the outside using a mantle heater, the contents were maintained at 30° C. for 30 minutes.

[0373] Afterwards, add the following ingredients to it:

[0374] Colorant dispersion (1) (15% colorant concentration): 47 parts

[0375] Release agent dispersion (release agent concentration is 25%...

Embodiment 2

[0388] Preparation of Toner Particles (2)

[0389] Toner particles (2) were prepared in the same manner as the preparation of toner particles (1) in Example 1, except that the crystalline polyester resin dispersion (2) and the non-crystalline polyester resin dispersion were used. Liquid (2) was used instead of the crystalline polyester resin dispersion liquid (1) and the non-crystalline polyester resin dispersion liquid (1) in Example 1, respectively.

[0390] The obtained toner particles (2) had a volume average particle diameter (D50) of 6.3 μm, a GSD (volume) of 1.23, and a shape factor SF1 determined by observing the particle shape under LUZEX FT (trade name, manufactured by Nireco Corporation) for 128. When the water-dispersed supernatant of the toner was prepared as described above, the concentration of methyl ethyl ketone in the water-dispersed supernatant measured by the above method was 5 ppm, and the concentration of methyl ethyl ketone in the water-dispersed supern...

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PUM

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Abstract

A toner for developing an electrostatic charge image, the toner including a binder resin containing a crystalline polyester resin and a noncrystalline polyester resin, a colorant, a releasing agent, a ketone solvent, and an alcoholic solvent, the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being less than about 10 ppm when 0.5 g of the toner is dispersed in 2 g of deionized water to form a toner dispersion liquid, and the total concentration of the ketone solvent and the alcoholic solvent in the toner dispersion liquid being from about 2 ppm to about 50 ppm when 0.5 g of the toner is dispersed in 2 g of N,N-dimethylformamide to form a toner dispersion liquid.

Description

technical field [0001] The present invention relates to a toner for developing an electrostatic latent image, a developer for developing an electrostatic charge image, a toner cartridge, a process cartridge, and an image forming apparatus. Background technique [0002] Many electrophotographic methods are known. For example, in one type of electrophotography, a latent image is electrically formed by various methods on a photoreceptor including a photoconductive substance. The latent image is developed with a toner, and the toner image on the photoreceptor is transferred to an image-receiving film such as paper directly or via an intermediate transfer member. The transferred image is fixed, for example, by heating, pressing, heating and pressing, solvent vapor, or the like. A fixed image is formed through the above-described plurality of steps. The toner remaining on the photoreceptor is removed by various methods as necessary, and the cycle including the above steps is re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/09G03G15/08G03G21/18G03G15/01
CPCG03G9/08797G03G9/08755G03G9/08795G03G9/09733G03G9/0804
Inventor 高木慎平吉田聪
Owner FUJIFILM BUSINESS INNOVATION CORP
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