Electrostatic charge image developing toner

An electrostatic charge image and toner technology, applied in the direction of developer, electrography, optics, etc., can solve the problems that the recording medium is difficult to separate, the toner is easy to agglomerate, etc., and achieves the effect of excellent mold release

Inactive Publication Date: 2014-06-11
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for a toner excellent in low-temperature fixability, generally, when stored at a high temperature, the toner tends to aggregate together, or the toner melts and adheres to the heated fixing roller, or the recording between the fixing roller and the formed image occurs. Difficult to separate media

Method used

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  • Electrostatic charge image developing toner
  • Electrostatic charge image developing toner
  • Electrostatic charge image developing toner

Examples

Experimental program
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Effect test

preparation example Construction

[0073] [Manufacturing method of toner for electrostatic charge image development]

[0074] Regarding the production method of the electrostatic charge image developing toner of the present invention, the electrostatic charge image developing toner is obtained by attaching an external additive to the surface of the toner mother particle. In addition, the preparation method of the toner base particles is not particularly limited, as long as the binder resin is mixed with a release agent and, if necessary, a toner base particle containing the above-mentioned components can be prepared. A pulverization method and an aggregation method are mentioned as a preferable manufacturing method of the toner base particle. In the pulverization method, the necessary components (binding resin and mold release agent) are mixed with optional components (colorant, charge control agent and magnetic powder), and melt-kneaded by a single-screw or twin-screw extrusion molding machine. The apparatus ...

Embodiment 1～4、 and comparative example 1～9

[0100] Using a Henschel mixer ("FM-20B" manufactured by Japan Coke Industry Co., Ltd.), with respect to 100 parts by mass of polyester resin ("TUFTONE, NE-7200" manufactured by Kao Corporation) as a binder resin, mixing 5 parts by mass of a release agent of the type described in Tables 3 to 5, 4 parts by mass of a colorant ("Carbon Black, MA-100" manufactured by Mitsubishi Chemical Corporation), 2 mass % of a charge control agent (Orient Chemical "N-01" manufactured by Kogyo Co., Ltd.). Using a twin-screw extrusion molding machine ("PCM-30" manufactured by Ikegai Co., Ltd.), the obtained mixture was melt-kneaded under the conditions of a material supply rate of 5 kg / hour, a shaft rotation speed of 150 rpm, and a cylinder temperature of 150°C. A melt-kneaded product was obtained. The obtained melt-kneaded product was pulverized into a coarse powder using a pulverizer ("ROTOPLEX MILL 8 / 16 type" manufactured by Toa Machinery Seisakusho Co., Ltd.). Next, the coarse powder was pu...

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PUM

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Abstract

An electrostatic charge image developing toner is provided. The electrostatic charge image developing toner includes toner base particles and an external additive. The toner base particles include a binder resin and a releasing agent. The external additive is attached to the toner base particles. An ester wax including a carboxylic acid component and an alcohol component each having a specific composition is used as the releasing agent, and an endothermic start temperature of the releasing agent is a predetermined temperature or more.

Description

technical field [0001] The present invention relates to a toner for developing an electrostatic charge image. Background technique [0002] In order to save energy and reduce the size of the device, it is desired to obtain a toner excellent in low-temperature fixing properties. A toner excellent in low-temperature fixability can be well fixed without strongly heating the fixing roller. However, toners excellent in low-temperature fixing properties often contain binder resins with low melting points and glass transition temperatures and release agents with low melting points. Therefore, for a toner excellent in low-temperature fixability, generally, when stored at a high temperature, the toner tends to aggregate together, or the toner melts and adheres to the heated fixing roller, or the recording between the fixing roller and the formed image occurs. Difficult to separate media. [0003] In order to solve such problems, the following toners have been proposed. The toner ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08
CPCG03G9/0821G03G9/08797G03G9/08782G03G9/09328G03G9/09725
Inventor 竹森资记菅原正伦
Owner KYOCERA DOCUMENT SOLUTIONS INC
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