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Conductive parts, Imaging processing box using the same parts and electric camera apparatus

A photographic device and conductive technology, applied in the direction of corona discharge device, electric recording technology using charge pattern, equipment using electric recording technology using charge pattern, etc., can solve the problem of accelerated surface wear and high durability that is not suitable for conductive parts problems such as chemical change and conductive fine particles falling off

Inactive Publication Date: 2007-11-14
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] Therefore, although the situation that the conductive particles fall off due to the wear of the surface of the conductive member can be alleviated, the initial characteristics are lost in a short time due to the accelerated wear of the surface. Measures are not suitable for high durability of conductive parts themselves, so it is not ideal
[0025] Furthermore, once the surface is damaged due to abrasion on the surface or near the surface, the conductive fine particles will be peeled off from the inner surface, so there is a problem caused by the shedding of the conductive fine particles.
In addition, the greater the thickness of the portion where the amount of conductive fine particles is substantially zero, the more unfavorable it is to uniformly charge the electrophotographic photoreceptor, so it is easy to cause image defects.

Method used

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  • Conductive parts, Imaging processing box using the same parts and electric camera apparatus
  • Conductive parts, Imaging processing box using the same parts and electric camera apparatus
  • Conductive parts, Imaging processing box using the same parts and electric camera apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] A charging roller was manufactured in the following steps.

[0148] Epichlorohydrin rubber terpolymer (epichlorohydrin: ethylene oxide: allyl glycidyl ether=40mol%: 56mol%: 4mol%) 100 parts by weight

[0149] Light calcium carbonate 30 parts by weight

[0150] Aliphatic polyester plasticizer 10 parts by weight

[0151] 1 part by weight of stearic acid

[0152] Antioxidant MB (2-mercaptobenzimidazole) 0.5 parts by weight

[0153] Zinc oxide 5 parts by weight

[0154] Quaternary ammonium salt (structure represented by the following formula) 2 parts by weight

[0155]

[0156] The above materials were kneaded for 10 minutes in a sealed mixer adjusted to 50° C. to prepare a raw material mixture. Taking the epichlorohydrin rubber of the raw material rubber as 100 parts by weight, add 1 part by weight of sulfur as a vulcanizing agent, 1 part by weight of DM (dibenzothiazolyl sulfide) as a vulcanization accelerator, and TS (tetrafluoroethylene) in the above mixture. M...

Embodiment 2

[0200] Also for the charging roller of this example, an elastic layer was formed in the same manner as in Example 1.

[0201] A surface layer 2d is formed to cover the elastic layer. The surface layer 2 d is formed by applying a coating solution for a surface layer shown below by a dip coating method. The number of times of dipping is 3 times.

[0202] First, as the coating solution for dip coating for the first and second times, the following substances were used as the material of the surface layer 2d:

[0203] 100 parts by weight of caprolactone-modified acryloyl polyol solution

[0204] 350 parts by weight of methyl isobutyl ketone

[0205] Conductive tin oxide microparticles (hexyltrimethoxy

[0206] Silane treated product, average particle size: 0.10μm,

[0207] Volume resistivity: 35Ω·cm) 220 parts by weight

[0208] Modified dimethyl silicone oil 0.02 parts by weight

[0209] Prepare the mixed solution using a glass bottle as a container. Glass beads (average p...

Embodiment 3

[0220] Also for the charging roller of this example, an elastic layer was formed in the same manner as in Example 1.

[0221] The surface layer 2d is formed on the above elastic layer by dip coating twice. For the surface layer 2d, the same coating liquid as the coating liquid for the first dip coating in Example 1 was used twice. The lifting speed is fixed at 7mm / s.

[0222] First, after applying the coating liquid for dip coating for the first time, it is air-dried at room temperature for 10 to 30 minutes. At this time, the coating liquid was also left to stand for the same period of time. Then, the roll was reversed and the same coating liquid as that for the first dip coating was applied. After coating, air-dry at normal temperature for 30 minutes or more, and then dry at 160° C. for 1 hour in a hot-air circulation dryer. The layer thickness of the dried surface layer was 20 μm.

[0223] For the produced charging roller, the average particle diameter and content in th...

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Abstract

In a conductive member having a support and provided thereon at least one cover layer, the cover layer has a surface layer, and the surface layer contains fine particles. In the surface layer, fine particles present at the surface-layer lower part corresponding to a range within 30% of the total layer thickness from the lowermost plane have an average particle diameter which is larger than the average particle diameter of fine particles present at the surface-layer upper part corresponding to a range within 30% of the total layer thickness from the uppermost plane. A process cartridge and an electrophotographic apparatus have such a conductive member.

Description

technical field [0001] The present invention relates to a conductive member having at least one coating layer on a support, an image forming process cartridge having a charging device having the conductive member as a charging member, and an electrophotographic device. Background technique [0002] In an electrophotographic device, which is an image forming apparatus employing an electrophotographic method, conductive members have various uses, and are used, for example, as members such as charging members, developing members, and transfer members. The conductive member used in these applications is arranged so as to be in contact with or close to the electrophotographic photoreceptor, and a DC voltage superimposed with an AC voltage or only a DC voltage is applied thereto during use. [0003] When a DC voltage superimposed with an AC voltage is used as an applied voltage, a high-voltage AC power supply is necessary, which leads to an increase in the cost of the electrophoto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G5/10G03G21/18G03G15/02
CPCG03G15/0233Y10T428/25E01F9/61E01F9/65E01F9/673
Inventor 谷口智士井上宏长田弘行都留诚司加藤久雄黑田纪明池田敦大高利博土井信治
Owner CANON KK