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Toner and image forming method using the same

A toner and plasticizer technology, applied in the field of toner, can solve problems such as image interference, gloss deterioration, and inability to obtain characteristics

Inactive Publication Date: 2006-08-16
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this toner also has such problems as stability of toner, disturbance of image, and deterioration of gloss
Therefore, the desired characteristics as a toner cannot be obtained yet

Method used

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  • Toner and image forming method using the same
  • Toner and image forming method using the same
  • Toner and image forming method using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0473] Preparation process of adhesive base material

[0474] Prepare the toner as follows:

[0475] Preparation of Solutions and / or Dispersion Liquids of Toner Components

[0476] Synthesis of non-modified polyester (polyester with low molecular weight)

[0477] The non-modified polyester was synthesized as follows.

[0478] (1) The following components were placed in a reaction vessel having a condenser, a stirrer, and a nitrogen introduction pipe, and reacted at 230° C. under normal pressure for 8 hours.

[0479] Adduct of bisphenol A and 2 moles of ethylene oxide 724

[0480] Adducts of bisphenol A and 3 moles of 3-pentanone oxide 84

[0481] Terephthalic acid 274

[0482] Dibutyltin oxide 2

[0483] (2) The reaction was further carried out for 5 hours under a reduced pressure of 10-15 mmHg.

[0484] The unmodified polyester thus obtained had a number average molecular weight (Mn) of 2100, a weight average molecular weight (Mw) of 5600, and a glass transition temper...

Embodiment 2

[0535] The toner matrix particles of Example 2 were prepared in the same manner as in Example 1, except that in the process of preparing the solution and / or dispersion liquid of the toner components, the amount of plasticizer dispersion liquid added was changed from 100 parts to For other than 200 copies.

Embodiment 3

[0537] The toner matrix particles of Example 3 were prepared in the same manner as in Example 2, except that 5 parts of 3-5-di-tert-butyl water were added during the preparation of the solution and / or dispersion liquid of the toner components Other than Fe(III) complexes of sycylic acid.

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PUM

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Abstract

A toner formed of a toner composition containing a resin and a plasticizer, wherein the following relationships (1) and (2) are satisfied: Tg2r>Tg2t (1), and Tg1t-Tg2t>Tg1r-Tg2r (2), wherein Tg1r represents the peak of the resin for the first temperature rise and Tg2r represents the peak of the resin for the second temperature rise when a differential scanning calorimeter (DSC) measurement is performed for the resin, Tg1t represents the peak of the toner including the resin for the first temperature rise and Tg2t represents the peak of the toner including the resin for the second temperature rise when a differential scanning calorimeter (DSC) measurement is performed for the toner.

Description

technical field [0001] This invention relates to toners for use in photocopiers, laser printers, facsimile machines that use electrophotography, electrostatic recording, xerographic printing, and more particularly, direct or indirect electrophotographic development systems. The invention further relates to full-color photocopiers, full-color laser printers, full-color facsimile machines, etc., which use direct or indirect electrophotographic multicolor development systems. The present invention also relates to an image forming method using the toner. Background technique [0002] Electrophotographic imaging is typically performed by the following process as described in U.S. Patent No. 2,297,691: [0003] (1) forming an electrostatic latent image on a photoreceptor, i.e., an electrostatic latent image bearing member; [0004] (2) developing the electrostatic latent image with a developer to form a visible image (toner image); and [0005] (3) Transferring a visible image ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/097G03G9/08G03G13/04G03G13/08G03G13/16
Inventor 杉本强山下佑士樋口博人
Owner RICOH KK
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