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Toner, two-component developer and image forming apparatus using the toner

A technology of toner and developer, which is applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., can solve the problem of stable output difficulties and achieve excellent environmental stability and durable stability

Inactive Publication Date: 2008-10-15
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This suggestion, while effective for the initial image, over time causes aging and environmental changes in the toner surface due to the stress additives of the developing unit are buried, especially in images that do not require a toner density sensor It is difficult to form a stable output in the class

Method used

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  • Toner, two-component developer and image forming apparatus using the toner
  • Toner, two-component developer and image forming apparatus using the toner
  • Toner, two-component developer and image forming apparatus using the toner

Examples

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Embodiment

Synthetic example 1

Synthetic example 2

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Abstract

A toner includes a binder resion, magnetic material and hydrophobized inorganic particle. The binder resin contains a polyester resin containing an inorganic tin(II) compound as a catalyst. The toner has a magnetization of from 10 to 25 emu / g in a magnetic field of 5 kOe. A ratio of a loss elastic modulus (G'') to a storage elastic modulus (G'), of from 0.7 to 1.3 when measured by a rheometer at a frequency of 0.1 Hz and a temperature 30 DEG C, higher than a glass transition temperature of the toner. The toner and developer of the present invention have excellent environmental stability and durable stability, do not have image leakage when transfer printing and do not generate image smudginess due to bad cleanness, and can reproduce thin line and halftone image with flying colors so as to output image with high quality.

Description

Toner, two-component developer, and image forming apparatus technical field The present invention relates to a toner for developing an electrostatic latent image in electrophotography, electrostatic recording, and electrostatic copying, a two-component developer containing the toner, and an image forming method and apparatus using the same. Background technique The electrophotography method usually uses a photoconductive material to form an electrostatic latent image on an electrostatic latent image carrier by various methods, and uses a toner to process the electrostatic latent image to form a toner image. After being printed on a recording medium such as paper, it is fixed by heating or solvent vapor, etc., and finally a copied image or a printed image is obtained. As a developing device for an electrostatic latent image on an electrostatic latent image carrier, it can be roughly divided into a method using a liquid developer (wet developing method) and a method using a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087G03G9/10G03G15/08
CPCG03G9/08755G03G9/0835G03G9/09708G03G9/09716G03G9/09725G03G2215/0607
Inventor 长谷川久美
Owner RICOH KK
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