Unlock instant, AI-driven research and patent intelligence for your innovation.

Toner for developing electrostatic charge image, developer and image forming apparatus

A toner and colorant technology, applied in the field of image forming devices, can solve the problems of loss of transfer improvement function, etc., and achieve the effect of excellent reproducibility of fine dots and high reliability of cleaning

Inactive Publication Date: 2008-09-17
RICOH KK
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in general, when a modified layered inorganic mineral is used, the inorganic mineral will be miniaturized and have a specific shape during the production of the toner, and the inorganic mineral is particularly abundant on the surface of the toner particles. , In this case, although the scraper can be used for cleaning, but the surface of the toner has unevenness, relatively large external additives will concentrate in the concave part, and the expected transfer improvement function will be lost.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Toner for developing electrostatic charge image, developer and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0257] In the reaction tank equipped with a cooling tube, a stirrer, and a nitrogen introduction pipe, put 229 parts of ethylene oxide 2 moles adducts of bisphenol A, 529 parts of bisphenol A propylene oxide 3 moles adducts, and terephthalate 208 parts of acid, 46 parts of adipic acid and 2 parts of dibutyltin oxide were reacted at 230° C. under normal pressure for 8 hours. Next, after reacting for 5 hours under a reduced pressure of 10-15 mmHg, 44 parts of trimellitic anhydride was added to the reaction tank, and reacted for 2 hours under normal pressure at 180° C. to synthesize an unmodified polyester resin.

[0258] The obtained unmodified polyester resin had a number average molecular weight of 2500, a weight average molecular weight of 6700, a glass transition temperature of 43° C., and an acid value of 25 mgKOH / g.

[0259] 1200 parts of water, 540 parts of carbon black Printex 35 (manufactured by Degussa A.G.; DBP oil absorption = 42 ml / 100 mg, pH = 9.5) and 1200 parts o...

Embodiment 2

[0280] A toner was prepared in the same manner as in Example 1 except that the external additive (C) in Example 1 was changed to the external additive (D).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a toner that has excellent minimum point reproducibility and can obtain excellent image with high quality, especially the toner has high cleanness characteristic and excellent lower temperature fixation characteristic, at the same time, has excellent transfer printing efficiency and has transfer printing residual toner. The invention also provides a toner filling container, a developer, an image forming apparatus, a processing cartridge and a method of manufacturing the toner. The toner provided by the invention includes a modified layered inorganic mineral in which at least a part of ions between the layers are modified with an organic material ion, wherein the toner includes at least one external additive having an average primary particle diameter of from 80 to 180 nm and an aspect ratio of from 0.7 to 0.95.

Description

technical field [0001] The present invention relates to a toner used in a developer for electrostatic charge image development in electrophotography, electrostatic recording, electrostatic printing, etc., and an image forming apparatus using the toner. More specifically, the present invention relates to a toner for developing an electrostatic image, a container containing the toner, a developer, An image forming apparatus, a process cartridge, and a method of manufacturing a toner. Background technique [0002] In one example of electrophotography, an electrostatic latent image is formed on an image carrier by charging and exposure, and then developed with a toner-containing developer to form a toner image. Furthermore, after the toner image is transferred onto the recording material, it is fixed. On the other hand, it cannot be transferred to the recording material, and the toner remaining on the image carrier is cleaned with a cleaning member such as a blade that contact...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/087
CPCG03G2215/0614G03G9/09708G03G9/08797G03G9/0819G03G9/09716G03G9/0904G03G9/08793G03G9/09725G03G9/08755G03G9/0902G03G9/0804G03G9/0827
Inventor 长友庸泰泽田丰志瀬下卓弥小岛智之铃木智美
Owner RICOH KK