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Color toner for electrophotography

A color toner, electrophotographic technology, applied in the direction of developer, electrography, instrument, etc., can solve the problems of poor fluidity of toner, poor text clarity, not long enough service life, etc. No deterioration in performance, stable image density, and low consumption

Inactive Publication Date: 2010-07-07
TOMOEGAWA PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method must add a large amount of conductive external additives to the surface of the toner, and the fluidity of the toner becomes poor, so the image density decreases with the increase in the number of printed sheets, and the service life is not long enough
In addition, conductive external additives are separated from the toner and transferred to the recording medium, thereby causing other problems such as deterioration of character definition or deterioration of environmental characteristics.

Method used

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  • Color toner for electrophotography
  • Color toner for electrophotography
  • Color toner for electrophotography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] (Manufacture of antistatic composition)

[0172]In 100 parts (70° C.) of bis(2-(2-butoxyethoxy) ethyl) adipate (manufactured by Sanko Chemical Industry Co., Ltd.) as an organic compound of the component (A), 10 wt. Add lithium trifluoromethanesulfonate LiCF as (B) component in % 3 SO 3 (manufactured by Morita Chemical Industry Co., Ltd.), and dissolved.

[0173] Next, after setting this solution to 60° C., synthetic hydrotalcite (manufactured by Kyowa Chemical Industry Co., Ltd., trade name: “Kyoward KW-2000”) as a component having anion adsorption capacity was added so as to become 2% by weight, Stir at 60°C for 60 minutes.

[0174] This solution was filtered to obtain an antistatic composition (X) composed of a transparent liquid.

[0175] The volume intrinsic impedance value of the obtained antistatic composition (X) was 4.1×10 6 Ω·cm.

[0176] Here, the volume intrinsic impedance value of the liquid was measured with a digital multimeter TR6865 (manufactured b...

Embodiment 2

[0201] In Example 2, except having made the compounding quantity of the antistatic composition (X) into 0.1 weight part, it carried out similarly to Example 1, and obtained the nonmagnetic two-component developer of Example 2.

Embodiment 3

[0203] In Example 3, except that the compounding amount of the antistatic composition (X) was 1.0 parts by weight, and the binder resin was ethylene-norbornene copolymer resin (manufactured by Ticona (Ticona), Mw78000, Mn6500 , Tg58° C.), the same procedure as in Example 1 was carried out to obtain the non-magnetic two-component developer of Example 3.

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Abstract

To provide an electrophotographic color toner that even at low development potential and low transfer potential, realizes a satisfactory image density, ensuring avoidance of ground fogging and prolonged life and to provide a nonmagnetic one-component color toner that despite developing machine life or environmental change, ensures less ground fogging and that is stable within the scope of low toner consumption rate, being free from toner scattering in machine. The electrophotographic color toner is characterized by containing an antistatic composition composed mainly of at least a binder resin, a colorant and the following components (A) and (B). Component (A): at least one member selected from among a compound with ether bond and / or ester bond and a (co)polymer with ether bond and / or ester bond. Component (B): component obtained by treating a salt of alkali metal or alkaline earth metal with a compound capable of anion adsorption.

Description

technical field [0001] The present invention relates to a color toner for electrophotography used for image formation in electrophotography, electrostatic recording, and the like. Background technique [0002] In electrophotography, conventionally, an electric latent image is formed by various methods, a toner is attached to the electrostatic latent image and developed, and then transferred to a recording medium such as paper. The developing toner used here is charged by various triboelectric charging methods and used in a state of holding positive or negative charges corresponding to the polarity of the electrostatic latent image to be developed. [0003] In addition, in recent years, since people have been looking forward to mechanical design that considers economy and environment, it has been seeking to obtain sufficient image density even at low developing potential and low transfer potential without generating background fog. and long-lasting developer. The long servi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/097G03G9/09G03G9/10
CPCG03G9/08704G03G9/0975G03G9/09775G03G9/08762G03G9/08759G03G9/08755G03G9/081G03G9/083
Inventor 岩木健太郎白鸟仁朗诹访义仁青木信之
Owner TOMOEGAWA PAPER CO LTD
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