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Carrier, developer, development device, image forming apparatus and image forming method

一种显影剂、载体的技术，应用在显影剂、应用电荷图形的电记录工艺、应用电荷图形的电记录工艺等方向，能够解决阻碍接触带电、载体电阻值变高、失去效果等问题

Inactive Publication Date: 2008-12-03
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the chance of contact electrification is hindered, and the electrification capacity decreases
In addition, in Patent Document 5, as described above, since the coating layer of the carrier is made of synthetic resin, in the case of using color toner, the resistance value of the carrier becomes high, and the effect is lost.

Method used

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  • Carrier, developer, development device, image forming apparatus and image forming method
  • Carrier, developer, development device, image forming apparatus and image forming method
  • Carrier, developer, development device, image forming apparatus and image forming method

Examples

Experimental program
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Embodiment Construction

[0021] according to figure 1 and figure 2 One embodiment of the present invention will be described.

[0022] The developer 1 according to this embodiment is a two-component developer containing a toner 3 and a carrier 2 . The toner, carrier, and developer will be described in order. Hereinafter, as long as it is not described as particles, it refers to the whole toner and the whole carrier.

[0023] (toner)

[0024] In toner 3, two or more additives having different particle diameters are added. The raw materials of the toner 3 include a binder resin and a colorant as essential components, and may contain a charge control agent and a release agent in addition to these.

[0025] The binder resin is not particularly limited, and known binder resins for black toner or color toner can be used. Examples include polyester resins, styrene resins such as polystyrene and styrene-acrylate copolymer resins, acrylic resins such as polymethacrylate, polyolefin resins such as polyet...

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PUM

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Abstract

A carrier of the present invention is used in a developer including a toner which includes at least a binder resin and an organic colorant, and the carrier has a core and a coating formed on the surface of the core, the coating including (i) a charge control agent for controlling a charge whose polarity is the same as a polarity of a charge controlled by a charge control agent included in the toner, and (ii) a conductive particles. The use of the carrier of the present invention enables: prevention of decrease in the charging amount of the toner which includes at least a binder resin and an organic colorant; and formation of a stable, high-resolution, high-quality image which has very few image defects such as a photographic fog.

Description

technical field [0001] The present invention relates to a carrier used in electrophotography for developing and visualizing an electrostatic latent image formed on an image carrier, a developer containing the carrier, a developing device using the developer, and image forming Device, and image forming method. Background technique [0002] In recent years, copiers, printers, facsimile devices, and the like that perform image formation using electrophotography have been widely spread along with the advancement of OA equipment. In an image forming apparatus using such an electrophotographic method, in order to form an image, a charging step, an exposure step, a development step, a transfer step, a cleaning step, and a fixing step are generally performed. Specifically, in the charging step, the surface of the photoreceptor as an image forming body is uniformly charged in a dark place. In the exposure step, the signal light of the original image is projected onto the charged ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/10G03G9/08G03G15/08G03G13/08
CPCG03G9/1131G03G9/1136G03G9/1075
Inventor 加本贵则岩松正吉冈伸之武藤吉纪平川弘幸原高志
Owner SHARP KK
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