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Color toner for optical fixing and image forming apparatus

A technology of color toner and optics, which is applied to the equipment, optics, and fixer of the electrical recording process using charge graphics, which can solve the problems of reduced productivity and toner color change, and achieve reduced power consumption and shortened warm-up time Effect

Inactive Publication Date: 2013-04-03
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the surface layer of the toner layer is rapidly heated and melted, but the infrared laser light is less likely to reach the lower layer, so that the surface layer is excessively heated and thermally decomposed before the lower layer is melted by heat from the surface layer, and as a result, the ink pink color change
[0013] Therefore, the processing speed is reduced to prevent color change and ensure fixability, but another problem arises such that when the processing speed is reduced, productivity is reduced

Method used

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  • Color toner for optical fixing and image forming apparatus
  • Color toner for optical fixing and image forming apparatus
  • Color toner for optical fixing and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example ）

[0036] figure 1 is a schematic front view of a dry electrophotographic color image forming apparatus provided with a fixing type color toner according to a first embodiment of the present invention, figure 2 is a schematic front view showing the fixing device in the image forming apparatus according to the first embodiment, and image 3 is a schematic right side view showing the fixing device in the image forming apparatus according to the first embodiment.

[0037]

[0038] as in figure 1 As shown in , the image forming apparatus 100 capable of using the color toner for optical fixing in the present invention is based on the image data transmitted from each terminal device on the network in a sheet used as a recording medium A multi-color or monochrome toner image is formed on the screen, and includes four visible image forming units 50Y, 50M, 50C, and 50B, a sheet conveying device 30 and a fixing device 40 .

[0039] The four visible image forming units 50Y, 50M, 50C, ...

example 1

[0124] [Production of Samples 1 to 5, Comparative Sample A, and Reference Sample]

[0125] Samples 1 to 5 and comparative samples were prepared by producing several color toners (volume average particle diameter: 6.7 μm) for optical fixing with different infrared light absorbing agent contents by the above melting-kneading-grinding method A, and a reference sample was prepared by producing a black toner (volume average particle diameter: 6.7 μm) by the melting-kneading-milling method. In addition, each sample was made in three colors (three kinds) of yellow, magenta, and cyan.

[0126]

[0127] Binder resin: polyolefin-based resin, 45.8% by weight (sample 1), 45.6% by weight (sample 2), 45.4% by weight (sample 3), 45.1% by weight (sample 4), 44.1% by weight % (sample 5), by weight 43.1% (compare sample A)

[0128] ·Masterbatch:

[0129] Masterbatch yellow: 31.5% by weight (polyolefin resin: 25.2% by weight, C.I. Pigment Yellow 74: 6.3% by weight)

[0130] Masterbatch mag...

example 2

[0170] [Production of samples 6 to 10, and comparative sample B]

[0171] Similar to Working Example 1, several color toners for optical fixing with different kinds of infrared light absorbers were produced as Samples 6 to 10 and Comparative Sample B based on the raw material of Working Example 1 by the melting-kneading-milling method.

[0172]

[0173] Binder resin: polyolefin-based resin, 45.5% by weight (sample 6), 45.1% by weight (sample 7), 44.7% by weight (sample 8), 44.1% by weight (sample 9), 42.1% by weight % (sample 10), 40.1% by weight (compare sample B)

[0174] ·Masterbatch:

[0175] Masterbatch yellow: 31.5% by weight (polyolefin resin: 25.2% by weight, C.I. Pigment Yellow 74: 6.3% by weight)

[0176] Masterbatch magenta: 31.5% by weight (polyolefin resin: 25.2% by weight, C.I. Pigment Red 57: 6.3% by weight)

[0177] Master batch cyan: 31.5% by weight (polyolefin resin: 25.2% by weight, C.I. Pigment Blue 15: 6.3% by weight)

[0178] ・Infrared light absorbe...

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Abstract

The invention provides a color toner for optical fixing and image forming apparatus. The color toner for optical fixing includes an infrared light absorbent and being compatible with an optical fusing device to irradiate an unfixed toner attached on a surface of a recording medium with infrared light to melt and fix the unfixed toner on the recording medium, wherein an optical absorptance of the color toner is set to be lower than an optical absorptance of a black toner in a wavelength region of the infrared light emitted from the optical fusing device.

Description

technical field [0001] The present invention relates to a color toner for optical fixing and an image forming apparatus capable of using the same. Background technique [0002] An electrophotographic image forming apparatus such as a copier, a printer, or a facsimile is provided with a fixing device to thermally fuse a toner image formed on recording paper to fix it on the paper. As an example of a fixing device, a roller pair type fixing device provided with a fixing roller, a pressure roller, and a temperature control device is known (refer to Japanese Unexamined Patent Publication No. 11-38802). [0003] Each of the fixing roller and the pressure roller is a roller member having a metal (such as aluminum) hollow cored rod and a heat-resistant elastic layer (such as a silicone rubber layer) formed on the surface of the cored rod. [0004] A halogen lamp is arranged inside the cored rod of the fuser roller as a heat source. In addition, a temperature sensor is provided on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/09G03G9/08G03G15/20G03G15/01
CPCG03G15/2007G03G2215/0141G03G9/0926G03G11/00
Inventor 前田智弘
Owner SHARP KK
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