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Magnetic toner

一种调色剂、磁性的技术，应用在磁性调色剂领域，能够解决影响调色剂水分吸附量、影响磁性材料分散状态、影响显影性能稳定性等问题，达到优异摩擦带电均匀性、优异带电稳定性、稳定显影性能的效果

Active Publication Date: 2013-02-13
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrophobizing the magnetic material affects the dispersion state of the magnetic material in the toner particles, and also affects the moisture adsorption amount of the toner, thereby greatly affecting the stability of the developing performance in a high-temperature and high-humidity environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-16 and comparative example 1-12

[0251] Magnetic Toners 1-28 were used to evaluate them in the following manner. The evaluation results are shown in Table 4.

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Abstract

A magnetic toner which has superior charging stability and charging uniformity, maintains stable developing performance without any dependence on service environments and may less cause any decrease in image density and any image defects such as fog and ghost, the magnetic toner has magnetic toner particles, each of the magnetic toner particles has magnetic toner base particle containing a binder resin and a magnetic material, and an inorganic fine powder, (a) the magnetic toner having, at a frequency of 100 kHz and a temperature of 30 DEG C, a dielectric loss factor (e'') of 2.5*10-1 pF / m or more and 7.0*10-1 pF / m or less and a dielectric dissipation factor (tan delta L) of 3.0*10-2 or less, (b) the magnetic toner having, in a dielectric dissipation factor (tan delta) thereof at a frequency of 100 kHz, a maximum value (tan delta H) within the temperature range of 60 DEG C to 140 DEG C; and the tan delta H and the tan delta L satisfying (tan delta H-tan delta L)< = 3.0*10-2.

Description

technical field [0001] The present invention relates to a magnetic toner used in a recording method using electrophotography, electrostatic recording, electrostatic printing, or toner jet system recording. Background technique [0002] In recent years, as image forming apparatuses such as copiers and printers advance in their various usage purposes and in various environments, higher speeds, higher image quality, and higher stability are being sought. For example, printers that were once mainly used in offices have come to be used in severe environments, and it has become important for them to secure stable image quality even under such conditions. [0003] In copiers and printers, for the purpose of making them usable without prioritizing their installation places and their usage environments, equipment is progressing in miniaturization and energy saving, and a magnetic one-component developing system utilizing magnetic toner It is preferably used because it is advantageou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/083G03G9/08
CPCG03G9/0836G03G9/0835G03G9/0833G03G9/0834G03G9/08G03G9/083G03G9/0802G03G9/0804
Inventor 青木梢长谷川雄介铃村祯崇
Owner CANON KK
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