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Electrostatic latent image developing toner, method for manufacturing electrostatic latent image developing toner, and method for fixing electrostatic latent image developing 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

Active Publication Date: 2015-03-18
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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  • Electrostatic latent image developing toner, method for manufacturing electrostatic latent image developing toner, and method for fixing electrostatic latent image developing toner
  • Electrostatic latent image developing toner, method for manufacturing electrostatic latent image developing toner, and method for fixing electrostatic latent image developing toner
  • Electrostatic latent image developing toner, method for manufacturing electrostatic latent image developing toner, and method for fixing electrostatic latent image developing 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 parts by mass of 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 obtained kneaded product was pulverized using a mechanical pulverizer ("TurboMill" manufactured by FREUNDTURBO Co., Ltd.), and then classified with a classifier ("Elbowjet" manufactured by Nippon Steel Mining Co., Ltd.) to obtain a product with a volume median diameter of 6 μm. Toner core.

[0134] (attachment process)

[0135] To the toner core, the titanium oxide fine particles A were ad...

Embodiment 2

[0147] The toner for developing an electrostatic latent image of Example 2 was obtained in the same manner as in Example 1 except that the titanium oxide fine particles B were used instead of the titanium oxide fine particles A.

Embodiment 3

[0149] The toner for developing an electrostatic latent image of Example 3 was obtained in the same manner as in Example 1 except that the titanium oxide fine particles C were used instead of the titanium oxide fine particles A.

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PUM

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Abstract

An electrostatic latent image developing toner includes toner particles (1). Each toner particle (1) includes a toner core (2) containing a binder resin, a shell layer (3) coating a surface of the toner core (2), and needle-like inorganic particulates (4). Each shell layer (3) contains a thermosetting resin, and the inorganic particulates (4) are present within the shell layer (3). The inorganic particulates (4) have: an aspect ratio of 1.25 or more and 2.5 or less; and an average major diameter and an average minor diameter of 300 nm or less.

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 an image forming apparatus such as a copying machine, toner for developing an electrostatic latent image is fixed to a recording medium (for example, paper) by heating and pressing using a fixing roller or the like. The toner components in the toner are fused or softened by heat and pressure, and fixed to the recording medium. With regard to such fixing, energy saving during fixing and downsizing of the fixing device are desired. Therefore, it is desired to obtain a toner capable of satisfactorily fixing a recording medium while suppressing heating and pressure of the fixing roller as much as possible. [0003] A toner containing toner particle...

Claims

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Application Information

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