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Toner for electronic camera

An electrophotography and toner technology, which is applied in the directions of developer, electrography, optics, etc., can solve the problems of not considering the effect of wax exudation in the fixing temperature range, and not considering the effect of wax exudation, so as to prevent high temperature offset. Phenomenon, excellent mold release, the effect of compatibility optimization

Inactive Publication Date: 2007-03-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no consideration has been given to ensure a wide fusing temperature range and wax bleed effect
[0024] In the toner for electrostatic charge image development disclosed in JP-A 2000-338707, moderate compatibility with binder resin and wide fixing temperature range are ensured by containing a predetermined alcohol-based paraffin wax, however, no consideration is given to Wax bleed effect

Method used

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  • Toner for electronic camera
  • Toner for electronic camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] The black toner A of the present invention is explained according to Examples 1 to 10 and Comparative Examples 1 to 11.

preparation example

[0147] Polyester resin (bisphenol A propylene oxide (bisphenol A propylene oxide) and terephthalic acid, fumaric acid or trimellitic anhydride used in combination) 100 parts by weight

[0148]5 parts by weight of carbon black

[0149] Charge control agent (zinc salicylate compound) 2 parts by weight

[0150] Carboxylic acid modified paraffin

Embodiment 1 to 8、 comparative example 1 to 9

[0151] Examples 1 to 8, Comparative Examples 1 to 9 3 parts by weight

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PUM

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Abstract

An object of the invention is to provide a black toner that can satisfy further the requirement for low energy, high-speed and high performance, a color toner that can be used in an image forming apparatus provided with an oil-less fixation device, and a color toner including the black toner and the color toner. For the black toner, a polyester resin having an acid value of 7 to 20 mgKOH / g is used as the binding resin, and a carboxylic acid-modified paraffin wax having an acid value of 4 to 30 mgKOH / g is used as the wax. For the color toner, polyester resin having an acid value of 7 to 20 mgKOH / g is used as the binding resin, and a carboxylic acid-modified paraffin wax having an acid value of 6 to 25 mgKOH / g is used as the wax.

Description

technical field [0001] The present invention relates to a toner for electrophotography. More particularly, the present invention relates to a black toner for black and white printing in an electrophotographic image forming apparatus such as a xerographic copier or a laser printer and an electrophotographic use for full color image formation Toner (electrophotographic toner). Background technique [0002] In recent years, electrophotographic black-and-white image forming apparatuses have been widely used. An image is formed in an electrophotographic black-and-white image forming apparatus through the steps of charging, exposing, developing, copying, and fixing. First, in the charging treatment step, the surface of the insulating photoreceptor is uniformly charged. In the exposure treatment step, an electrostatic latent image is formed on the surface of the photoreceptor by irradiating light corresponding to image formation. In the developing step, black toner is selective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08G03G9/087
CPCG03G9/08755G03G9/08782
Inventor 小川哲久保雅彦泽井正幸木田耕史
Owner SHARP KK
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