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Resin composition for toner and toner

A technology of resin composition and toner, which is applied in the field of toner, can solve the problems that thermal paste performance cannot meet the needs, etc., and achieve the effects of speeding up the copying speed, saving energy, and high image quality

Inactive Publication Date: 2003-01-08
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even these methods are not satisfactory in terms of thermal paste performance, so improvements are required
[0008] So far, various methods have been tried; however, none of them can significantly solve the above-mentioned problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] A method similar to that in the resin preparation 1 was used, except that 3 parts of wax composition A were added in the solvent removal step to obtain a resin composition for toner.

[0145] Further, after pre-mixing the following with a Henschel mixer: 87 parts of resin composition for toner, 8.0 parts of carbon black (MA100, available from Mitsubishi Chemicals Corp.), 1.0 part of charge control agent (BONTRON S-34 , Purchased from Orient Chemical Industries Co., Ltd.) and 3.0 parts of polypropylene wax (Hiwax NP105, Mitsui Chemicals Inc.), the resulting mixture was kneaded with a twin-screw extruder at 120°C, then cooled, ground and pulverized, followed by The classification is performed with a particle size classifier, thereby obtaining a toner of 6.0 to 18.0 μm. After that, hydrophobic silica gel (R-972, available from Aerosil Corp.) was added from the outside at a ratio of 0.5 parts by weight to 100 parts by weight of the aforementioned toner, and then mixed with a He...

Embodiment 2-18

[0146] According to a method similar to Example 1, except that the type of resin and the type and amount of wax composition added were changed, a toner was obtained. The evaluation results of the toner thus obtained are shown in Table 3.

Embodiment 19

[0148] The same operation as in Example 1 was performed, and 3 parts of Hiwax NP105 was added in the solvent removal step, and then the solvent was removed in accordance with the method in the preparation of resin for toner 1, thereby obtaining a resin for toner combination. Then, the operation based on Example 1 was performed using this resin composition for toner to obtain a toner. The evaluation results of the toner thus obtained are shown in Table 3.

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PUM

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Abstract

A resin composition for toners which comprises: (A) a wax composition comprising an ethylene polymer having a melt index as measured at 190 + / - 0.4 DEG C of 0.1 to 100 and either a paraffin wax having a melting point of 70 to 120 DEG C or a Fisher / Tropsch wax having a melting point of 70 to 120 DEG C; and (B) a binder resin for toners.

Description

Technical field [0001] The present invention relates to a resin composition for toner used in electrophotography and the like, and to a toner. Background technique [0002] Electrophotography in copiers and printers usually uses a method that includes the following steps: electrostatically form a latent image on a photosensitive material, use toner to develop the latent image, and transfer the toner image to a sheet for fixation, such as a piece of paper Then, the image is pressure-fixed with a heat roller (heat roller fixing method). This hot roller fixing method requires a toner with good fixing performance, which allows fixing at low temperatures to improve cost efficiency in terms of energy consumption and the like, allows an increase in copy speed, and can prevent curling and the like of the sheet. In addition, with the development of computers, high-definition televisions, etc., recently, the requirements for high-quality images and high-definition reproduction images have ...

Claims

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Application Information

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IPC IPC(8): G03G9/087
CPCG03G9/08782G03G9/08704G03G9/087
Inventor 寺内知哉山本卓内山健治武井宏之
Owner MITSUI CHEM INC