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Conductive rubber member

By using a surface treatment liquid of over-dispersed carbon black and isocyanate compounds on the surface of the conductive elastic layer of the conductive rubber component, a uniform conductive path is formed, which solves the problem of large changes in the resistance value of the conductive rubber component and achieves a change in resistance value. Stability and image quality improvements.

Active Publication Date: 2010-09-15
SYNZTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the surface treatment layer is formed using a surface treatment liquid mixed with carbon black, the structure of carbon black cannot be uniformly formed by the surface treatment liquid, and the resistance value may vary

Method used

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  • Conductive rubber member
  • Conductive rubber member
  • Conductive rubber member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070]

[0071] In 100 parts by mass of epichlorohydrin rubber (Epichlomer CG-102, manufactured by Daiso Co., Ltd.), 0.3 parts by mass of sodium trifluoroacetate and 5 parts by mass of zinc oxide (ZnO) as a conductive material were mixed as 2-mercaptoimidazoline (Accel-22) of 2 parts by mass of the vulcanizing agent is kneaded with a roll mixer, extruded on the surface of a metal shaft with a diameter of 6 mm, ground to a diameter of 14 mm, and formed on the surface of the shaft. A conductive elastic layer comprising epichlorohydrin rubber, an untreated roller 1 was prepared.

[0072]

[0073] Using a ball mill, 20 parts by mass of acetylene black, 1.5 parts by mass of polyethylene glycol-polypropylene glycol monomethacrylate (weight average molecular weight 1500) (referred to as "dispersant A1" in the table), 78.5 parts by mass of acetic acid The butyl ester was dispersed and mixed at 50°C for 3 hours to prepare a carbon black dispersion 1.

[0074]

[0075] Mix 20 mas...

Embodiment 2

[0077] Except using polyoxyethylene alkylamine (weight-average molecular weight 3000) (referred to as "dispersant B" in the table) to replace polyethylene glycol-polypropylene glycol monomethacrylate (weight-average molecular weight 1500), the same as in Example 1. The conductive roller of Example 2 was prepared in the same manner.

Embodiment 3

[0079] The conductive roller of Example 3 was produced in the same manner as in Example 1, except that acetylene black which had been preliminarily treated with alkali was used in the dispersion treatment of carbon black. It should be noted that the acetylene black was prepared as follows: after being placed in 2M sodium hydroxide solution at 80°C for 15 minutes, it was washed with pure water and dried at 120°C for 4 hours.

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Abstract

Disclosed is a conductive rubber member which is small in variations of electrical resistance and stable in electrical resistance over a long time. Specifically disclosed is a conductive rubber member comprising a surface treated layer in the surface portion of a conductive elastic layer, which is obtained by providing a rubber base with conductivity. The surface treated layer is formed by impregnating the surface portion of the conductive elastic layer with a surface treatment liquid containing a carbon black subjected to a dispersing treatment and an isocyanate compound.

Description

technical field [0001] The present invention relates to a charge-imparting roller and an image-transfer roller which are particularly suitable for use in image forming devices such as xerographic copiers and printers or toner-jet-type copiers and printers Conductive rollers such as development rollers, toner-supply rollers, cleaning rollers, conductive rubber parts such as scrapers and transfer belts. Background technique [0002] Conductive rubber members of image forming devices such as xerographic copiers and printers are given conductivity by carbon black or the like, but changes in resistance value or changes in resistance value pose a problem. It should be noted that the change in the surface resistance value of the conductive rubber member or the change in the resistance value is a cause of white spots or the like during imaging. [0003] Therefore, the present applicant proposes a developing roller in which a surface-treated layer obtained by surface-treating a surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/04G03G15/09
CPCG03G15/0818G03G15/2057
Inventor 本川慎二平川直树
Owner SYNZTEC
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