Electrostatic image developing toner

A technology of toner and electrostatic charge, applied in the field of electrostatic charge image developing toner, can solve the problems of deterioration, improved document preservation, difficulty in producing output images, etc., and achieves improved brush resistance and improved document preservation. Effect

Inactive Publication Date: 2017-06-06
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although low-temperature fixing properties have been improved in the conventional technology, improvements in fixing separation properties and document preservation properties are further desired.
In addition, the toner loaded in the electrophotographic image forming apparatus sometimes deteriorates during a large amount of printing, so even if it is used for a long time, it is required that the image defect of the output image is difficult to occur, and the improvement of the printing resistance is also required.

Method used

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

Examples

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Embodiment

[0202] The following examples are given to describe the present invention in detail, but the present invention is not limited thereto. In addition, the expression of "part" or "%" is used in an Example, Unless otherwise indicated, it means "part by mass" or "% by mass".

[0203] In addition, molecular weight (weight average molecular weight (Mw) and number average molecular weight (Mn)) was measured by gel permeation chromatography (GPC). Specifically, using the device "HLC-8120GPC" (manufactured by Tosoh Corporation) and the column "TSKguardcolumn+TSKgelSuperHZ-M3 connection" (manufactured by Tosoh Corporation), the flow rate was 0.2 mL / min while maintaining the column temperature at 40°C. Tetrahydrofuran (THF) was flowed as a carrier solvent, and the measurement sample (resin) was dissolved in THF under the dissolution condition of treating with an ultrasonic disperser for 5 minutes at room temperature so that the concentration became 1 mg / ml. Next, use a membrane filter wi...

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Abstract

Provided is an electrostatic image developing toner incorporating toner mother particles containing a binder resin and a releasing agent, wherein the binder resin contains an amorphous polyester resin and a crystalline resin; and the toner mother particles have a region (A) including a structure a formed with the releasing agent and the crystalline resin being in contact with each other, and a region (B) in which the crystalline resin forms a lamellar crystalline structure b independently existing without contacting with the releasing agent.

Description

technical field [0001] The present invention relates to a toner for developing electrostatic images. More specifically, the present invention relates to a toner for developing an electrostatic image having improved low-temperature fixing properties, fixing separation properties, document preservation properties, and printing durability. Background technique [0002] In accordance with the trend of energy saving in recent years, studies on low-temperature fixing of toners have also been intensively conducted in electrophotographic image forming apparatuses, and studies using crystalline materials are examples of such studies. [0003] For example, there is a proposal to make a toner containing a crystalline resin by making the toner have a structure in which crystals of the crystalline resin come into contact with a release agent and a crystal structure of the crystalline resin alone. A technology that has little dependence on fixing speed of bending resistance (for example,...

Claims

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Application Information

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IPC IPC(8): G03G9/087G03G9/08
CPCG03G9/08G03G9/087G03G9/08782G03G9/08797G03G9/0825G03G9/08755
Inventor 野宫诚藤崎奈津子内野泰子大柴知美
Owner KONICA MINOLTA INC
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