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Static charge developing agent and imaging method

An imaging method and developer technology, applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., to achieve stable and good copying effect

Inactive Publication Date: 2004-05-26
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, also in the case of using a developer in which the silicon carbide is added to the surface of the toner, similar to the above, the toner is easily fused to the photosensitive drum during blade cleaning, and on the copied image, a problem based on toner is generated. White spots of toner fusion

Method used

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  • Static charge developing agent and imaging method
  • Static charge developing agent and imaging method
  • Static charge developing agent and imaging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] The present invention is described in more detail below by way of examples, but the following examples do not constitute any limitation to the present invention. In addition, in the following, "parts" all represent "parts by weight".

[0076] First, the method for producing the silicon carbide fine powder used in the first embodiment will be specifically described. The silicon carbide fine powders adopted in the 2nd to 6th embodiments and the 1st to 2nd comparative examples can be adjusted to the amount of the coagulant added, or measures such as the primary particle size of the fine particles to be compared with the following Manufactured in the same way.

[0077] (Manufacture of silicon carbide fine powder)

[0078] After being synthesized by the Acheson method, D 50 (average particle size) = 25μm, S.A. (specific surface area) = 0.07m 2 Raw materials for pulverization of α-SiC / g (BET method. The same below) are put into a pulverizer with water and iron pellets to c...

no. 1 Embodiment

[0099] Manufacture of developer

[0100] 100 parts of copolymer of styrene and acrylate

[0101] Magnetic body (magnetite) 93 parts

[0102] Nigrosine dye 6 parts

[0103] 3 parts synthetic paraffin

[0104] The above-mentioned components were uniformly mixed, then stirred, pulverized, and classified to obtain positively charged toner particles with an average particle diameter of 10.4 μm. Next, to 100 parts of the toner particles, 0.3 parts of silica fine powder treated with dichlorodimethylsilane, and 0.42 μm in average primary particle size and 26.3 μm in specific surface area were added. 2 / g, 40.6% of solidified particles, 0.21% by weight of Fe element attachment, and 0.25% by weight of Al element attachment were mixed with 1.0 parts of silicon carbide fine powder to obtain a positively charged magnetic toner.

[0105] copy test

[0106] Using the toner obtained in the above manner, in a commercially available digital copier GP-605 (manufactured by Canon Corporati...

no. 2 Embodiment

[0113] Manufacture of developer

[0114] With respect to 100 parts of toner particles produced in the first example, 0.4 parts of silica fine powder treated with dichlorodimethylsilane was added, and the average primary particle diameter was 0.32 μm, and the specific surface area was 31.6 μm. 2 / g, 52.7% of solidified particles, 0.30% by weight of Fe element attachment, and 0.437% by weight of Al element attachment, 1.0 parts of silicon carbide fine powder were mixed to obtain a positively charged magnetic toner.

[0115] copy test

[0116] Using the toner obtained in the above manner, in the commercially available digital duplicating machine iR8500 (manufactured by Canon Corporation), the Si—O on the drum surface is loaded with an amorphous silicon photosensitive drum (A) of 67.5%, at normal temperature and normal temperature. In wet (23°C, 50%RH), high temperature and normal humidity (30°C, 85%RH), low temperature and low humidity (10°C, 20%RH) environments, a real prin...

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Abstract

An image-forming process, which comprises steps of developing an electrostatic latent image on an inorganic photoreceptor with an electrostatic image developer containing 0.1 to 5.0% by weight, based on the toner particles, of silicon carbide fine powder of 0.2 to 1.5 mu m in average primary particle size, 10 to 50 m<2> / g in specific surface area and 10 to 60% in amount of agglomerated particles, said silicon carbide fine powder being contained in an amount of 0.1 to 5.0% by weight, transferring the developed image to a transfer member, then removing residual toner particles on the photoreceptor by means of a cleaning blade.

Description

technical field [0001] The present invention relates to an electrostatic charge image developer for developing an electrostatic charge image in an electrophotographic copier, a laser beam printer, an electrostatic recording device, and a method for forming an image using the electrostatic charge image developer. Background technique [0002] In the past, methods for obtaining copied images and recorded images using electrophotographic copiers using electrophotography, laser beam printers, electrostatic recording devices using electrostatic recording methods, etc. (hereinafter, both collectively referred to as "reproduced images"). [0003] In the above-mentioned electrophotographic copying machine, laser beam printer, etc., formation of a copied image by electrophotography is generally performed as follows. That is, first, an electrostatic latent image carrier formed of a photosensitive drum using an inorganic photoconductive material such as amorphous silicon or selenium o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G5/08G03G5/082G03G9/083G03G9/097G03G15/08G03G15/09
CPCG03G5/08214G03G9/09708
Inventor 中西靖家村浩文林重宏
Owner TOYO INK SC HOLD CO LTD
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