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Image forming device and colour toner

A technology of toner and yellow toner, which is applied in the direction of electric recording process applying charge pattern, equipment of electric recording process applying charge pattern, developer, etc. The requirements of the color reproduction range, the difficulty of color reproduction performance, etc., to achieve the effect of expanding the color reproduction area

Inactive Publication Date: 2009-09-23
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned toners still cannot meet the requirements of the color reproduction range, and it is very difficult to improve the color reproduction performance of red formed by superposition of magenta and yellow.
Also, when each toner is used to form an image independently, the scattering of the toner is not much, but in the case of using at least three toners, the problem of toner scattering as much as three times occurs as a result.

Method used

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  • Image forming device and colour toner
  • Image forming device and colour toner
  • Image forming device and colour toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0202] The present invention will be further described below through examples, but the present invention is not limited thereto.

[0203] In addition, "part" mentioned below means a weight part, and "%" means a weight%.

[0204]

Synthetic example 1

[0205] [Synthesis Example 1 (Synthesis of Crystalline Polyester Resin No. 1)]

[0206] Add to a 5-liter four-neck flask equipped with a nitrogen introduction tube, a dehydration tube, a stirrer and a thermocouple

[0207] 1,4-butanediol: 23.75 moles

[0208] Ethylene glycol: 1.25 moles

[0209] Fumaric acid: 22.75 moles

[0210] 1,2,4-Pellisic anhydride: 1.65 moles

[0211] Hydroquinone: 4.8 grams

[0212] After reacting at 160° C. for 5 hours, the temperature was raised to 200° C. for 1 hour, and then at 8.3 kPa for 1 hour to obtain crystalline polyester resin No.1.

[0213]

[0214] [Synthesis of titanium-containing catalyst (a)]

[0215] Add the 80% aqueous solution of dihydroxybis(triethanolamide) titanium to the reactor that cooling pipe, stirrer and the nitrogen inlet pipe that can bubble in the liquid phase are housed, under the condition of blowing nitrogen bubbles in the liquid phase, Slowly raise the temperature to 90°C and react at 90°C for 4 hours (hydrolys...

Embodiment 1

[0226] formula:

[0227]

[0228]

[0229] After fully mixing the following toner compositions with a blender, they were melt-kneaded with a twin-screw extruder (mixing temperature: 140°C, extrusion speed: 10kg / hour, calendering nip: 2mm, and left to stand for 48 hours After that, it was pulverized and classified to obtain an original toner having a volume-average particle diameter of 7.6 μm. With respect to 100 parts of the original toner, 0.4 parts of hydrophobic silica (surface treated with hexamethyldisilylamine, particle diameter of primary particles: 0.02 μm) was mixed as an additional additive with a Henschel mixer , and a cyan toner (C-1) was obtained. The mixing condition is 1500 rpm, and the mixing cycle is eight times, and each cycle is stirring for 60 seconds and then stopping for 60 seconds.

[0230] * Crystalline polyester resin No.1 35 parts

[0231] * Amorphous polyester resin A 65 parts

[0232] * Carnauba wax (melting point: 81°C) 5 parts

[0233]...

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PUM

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Abstract

The invention relates to an image forming device for forming colourful images and a colour toner for forming the colourful images. The image forming device comprises an image carrying device, a charging device, an exposure device, developing devices, a transfer device and a fixing device. The image forming device is at least provided with three developing devices which use yellow developer, magenta developer and green developer. Visual images on a recording medium are formed by using developer containing yellow colour toner, developer containing magenta colour toner and developer containing green colour toner, which at least contain crystalline polyester resin. The magenta colour toner contains organic paint expressed by chemical structural formula (1); the yellow colour toner contains organic paint expressed by chemical structural formula (2) and / or (3). 100 weight parts of colour toner grains contain the crystalline polyester resin. Colour reproduction areas of yellow, magenta and red are expanded. Dispersing phenomenon of colour toner in the image forming device is reduced.

Description

technical field [0001] The present invention relates to an image forming apparatus for forming a color image by electrostatic copying of a copier, facsimile machine, printer, etc., and a toner for forming the color image. Background technique [0002] When forming an image by electrostatic copying, an electrostatic latent image is formed on an image carrier such as a photoconductive material, and charged toner particles are attached to the electrostatic latent image to form a visible image. , and then transfer and fix the toner image to a recording medium such as paper to become an output image. In recent years, the technology of copiers and printers using the electrostatic copying method is rapidly advancing from monochrome to color, and the market for color technology tends to expand. [0003] Forming a color image by the color electrostatic copying method is generally to make three primary colors of yellow, magenta, and cyan color toner (toner), or add black four-color t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/01G03G9/08G03G15/20G03G9/09
Inventor 朱冰岸田宏之
Owner RICOH KK
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