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Charging member, process cartridge, and electronic photography device

A charging member and electrophotographic technology, applied in the direction of equipment, electrical components, corona discharge devices, etc. using the electric recording process of the charge pattern, can solve the problems of surface oxidation of the charging member, deterioration of charging performance, change, etc., and achieve stable formation. , the effect of superior charging performance

Active Publication Date: 2014-01-01
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the charging member is continuously used for a long period of time, the surface of the charging member may be oxidized to start gradually deteriorating and the charging performance changes over time

Method used

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  • Charging member, process cartridge, and electronic photography device
  • Charging member, process cartridge, and electronic photography device
  • Charging member, process cartridge, and electronic photography device

Examples

Experimental program
Comparison scheme
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specific example

[0225] Alcohols can be exemplified by ethanol, methanol, and 2-butanol; ketones can be exemplified by ethyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.

[0226] Any of the above-mentioned alcohols and ketones can be used as a mixture. In particular, from the viewpoint of the solubility of the initiator in alcohols, ethanol or a mixed solvent of methanol and 2-butanol or a mixed solvent of ethanol and 2-butanol are preferable.

[0227] From the viewpoint of maintaining stable charging performance of the charging member and preventing any coating unevenness from occurring, the coating medium may preferably have a solid content concentration of 0.05% by mass or more and 4.00% by mass or less.

[0228] Steps (6) and (7); Formation of the surface layer:

[0229] The coating medium that has been prepared in this manner is coated on the conductive elastic layer by coating, dip coating, ring coating, or the like using a roll coater to form a layer of the coating medium (hereina...

Embodiment 1

[0252] (1) Formation and evaluation of elastic layer

[0253] Table 1

[0254]

[0255] The materials shown in Table 1 were used with a 6-liter volume pressurizing kneader (trade name: TD6-15MDX; manufactured by Toshin Co., Ltd.) at a packing rate of 70 vol.% and a blade rotation of 30 rpm. Mix several times for 24 minutes to obtain an unvulcanized rubber composition. To 174 parts by mass of this unvulcanized rubber composition, 4.5 parts of tetrabenzylthiuram disulfide (trade name: SANCELER TBzTD; available from Sanshin Chemical Industry Co., Ltd.) were added as a vulcanization accelerator and 1.2 parts of sulfur as a vulcanization agent. Agent. Then, these were mixed with an open roll with a roll diameter of 30.5 cm (12 inches) at a front roll rotation of 8 rpm, a back roll rotation of 10 rpm, and a nip of 2 mm, and a total of 20 cuts were performed left and right. Thereafter, the nip was changed to 0.5 mm to perform 10 thin passes to obtain a kneaded product I for a conductiv...

Embodiment 2 to 23

[0320] (1) Preparation and evaluation of condensate numbers 2 to 23

[0321] Except for the compositions of the condensate intermediates 2 to 7 shown in Table 9 below, the condensate intermediates 2 to 7 were prepared in the same manner as the condensate intermediate 1 in Example 1. Next, except for the compositions of the condensates 2 to 23 shown in the following Table 10, the condensates 2 to 23 were prepared in the same manner as the condensate 1 in Example 1. Evaluation was performed in the same manner as the method described in the evaluation of (1) in Example 1, except that each condensate obtained was used. The results obtained are shown in Table 12.

[0322] Table 9

[0323]

[0324] Here, the abbreviated symbols EP-1 to EP-5, He and Ph in the component (A) and (B) columns of Table 9 and also the abbreviated symbols Ti-1 to Ti-1 in the component (C) column of Table 10 Ti-3 represents the compound shown in Table 11.

[0325] Table 10

[0326]

[0327] Table 11

[0328]

[032...

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PUM

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Abstract

A charging member for electrophotographic apparatus is provided which has a superior charging performance for the electrophotographic photosensitive member and also can not easily change with time in charging performance. The charging member has a substrate, an elastic layer and a surface layer, which surface layer contains a high-molecular compound having an Si—O—Ti linkage in the molecular structure and a cyclic polysilane represented by the general formula (7) defined in the specification, and the high-molecular compound has a constituent unit represented by the general formula (1) and a constituent unit represented by the following formula (2) which are defined in the specification.

Description

Technical field [0001] The present invention relates to a charging member for contact charging of an electrophotographic device, and to a process cartridge and an electrophotographic device. Background technique [0002] The charging member, which is generally provided in contact with the electrophotographic photosensitive member to electrostatically charge the electrophotographic photosensitive member, is configured to have an elastic layer containing rubber so as to sufficiently and uniformly ensure a contact nip between the electrophotographic photosensitive member and the charging member. In this elastic layer, a low molecular weight component is inevitably contained, and thus the low molecular weight component may bleed out to the surface of the charging member, and as a result of long-term use, the surface of the electrophotographic photosensitive member is contaminated. [0003] In order to solve this phenomenon, PTL 1 discloses a configuration in which the outer periphery o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02
CPCG03G15/0233G03G15/02
Inventor 黑田纪明儿玉真隆铃村典子友水雄也益启贵
Owner CANON KK
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