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Toner for developing an electrostatic latent image, method for producing the toner, and method for fixing the toner

An electrostatic latent image and toner technology, applied in the direction of developer, electric recording process using charge pattern, electric recording process using charge pattern, etc., can solve problems such as image unevenness, and achieve the effect of maintaining chargeability

Inactive Publication Date: 2018-08-28
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the development ghost refers to an image defect in which unevenness occurs on the image due to excessive charging of the toner to develop a portion where the electrostatic latent image does not exist during image formation.

Method used

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  • Toner for developing an electrostatic latent image, method for producing the toner, and method for fixing the toner
  • Toner for developing an electrostatic latent image, method for producing the toner, and method for fixing the toner
  • Toner for developing an electrostatic latent image, method for producing the toner, and method for fixing the toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] (preparation process)

[0133] Using an FM mixer, 100 parts by mass of polyester resin (manufactured by Kao Corporation, acid value 16 mgKOH / g, hydroxyl value 22 mgKOH / g, softening point Tm 100°C, glass transition temperature Tg 48°C), 5 mass parts colorant (C.I. Pigment Blue 15:3 type, copper phthalocyanine) and 5 parts by mass of a release agent (ester wax, "WEP-3" manufactured by NOF Corporation) were mixed to obtain a mixture. The obtained mixture was melt-kneaded using a twin-screw extruder (“PCM-30” manufactured by Ikegai Co., Ltd.) to obtain a kneaded product. The resulting kneaded product was pulverized using a mechanical pulverizer (“TurboMill” manufactured by FREUNDTURBO Co., Ltd.), and then classified by a classifier (“Elbowjet” manufactured by Nippon Steel Mining Co., Ltd.) to obtain a 6 μm volume median diameter. Toner core.

[0134] (attachment process)

[0135] To the toner cores, titanium oxide fine particles A were added so that the adhesion amount w...

Embodiment 2

[0147] The same operation as in Example 1 was carried out except that the titanium oxide fine particles A were replaced with titanium oxide fine particles B to obtain a toner for developing an electrostatic latent image of Example 2.

Embodiment 3

[0149] A toner for developing an electrostatic latent image of Example 3 was obtained by performing the same operations as in Example 1, except that the titanium oxide fine particles A were replaced with titanium oxide fine particles C.

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PUM

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Abstract

The present invention provides a toner for developing an electrostatic latent image, a manufacturing method thereof, and a fixing method thereof. The toner for developing an electrostatic latent image of the present invention contains toner particles. The toner particles include: a toner core containing a binder resin, a shell layer covering the surface of the toner core, and needle-shaped inorganic fine particles. The shell layer contains a thermosetting resin and contains inorganic fine particles inside. The aspect ratio of the inorganic fine particles is not less than 1.25 and not more than 2.5, and the average major axis diameter and the average minor axis diameter are not more than 300 nm.

Description

technical field [0001] The present invention relates to a toner for developing an electrostatic latent image, a method for producing the toner for developing an electrostatic latent image, and a fixing method using the toner for developing an electrostatic latent image. Background technique [0002] In the technical field related to image forming apparatuses such as copiers, the electrostatic latent image developing toner is fixed to a recording medium (eg, paper) by heat and pressure using a fixing roller or the like. The toner components in the toner are melted or softened by heat and pressure, and are fixed to the recording medium. With regard to such fixing, it is desired to achieve energy saving during fixing and miniaturization of the fixing device. Therefore, it is desired to obtain a toner that can satisfactorily fix a recording medium while suppressing the heating and pressure of the fixing roller as much as possible. [0003] A toner containing toner particles wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/093G03G9/08G03G13/20
CPCG03G9/09392G03G9/09314G03G9/09328G03G9/09342G03G9/09371G03G9/09708
Inventor 冈田圣二
Owner KYOCERA DOCUMENT SOLUTIONS INC