Conductive member, process cartridge, and electrophotographic apparatus

A conductive member and conductive technology, applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, and the electric recording technique, etc., can solve the problem of charge residue, image density, and the inability to obtain a relaxation and development member Achieve high quality and suppress unevenness due to problems such as sufficient charge time

Active Publication Date: 2014-08-06
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, sometimes, sufficient time to relax the charge on the surface of the developing member cannot be obtained, so the charge remains on the surface
As a result, the residual charge on the surface of the developing member sometimes affects the developing electric field, so image shading occurs at the time of image formation

Method used

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  • Conductive member, process cartridge, and electrophotographic apparatus
  • Conductive member, process cartridge, and electrophotographic apparatus
  • Conductive member, process cartridge, and electrophotographic apparatus

Examples

Experimental program
Comparison scheme
Effect test

experiment example I

[0093] Production and Evaluation of Experimental Example 1 Elastic Roller

[0094]

[0095] (Component (A))

[0096] A linear polydimethylsiloxane in which both terminals of the molecular chain are terminated with dimethylvinylsilyl groups having the viscosity and vinyl equivalent shown in Table 1 was used as component (A).

[0097] [Table 1]

[0098] Table 1

[0099] A-1

Viscosity: 40.0Pa·s, vinyl equivalent: 0.025mmol / g

A-2

Viscosity: 5Pa·s, vinyl equivalent: 0.040mmol / g

A-3

Viscosity: 150Pa·s, vinyl equivalent: 0.017mmol / g

A-4

Viscosity: 300Pa·s, vinyl equivalent: 0.015mmol / g

A-5

Viscosity: 100Pa·s, vinyl equivalent: 0.020mmol / g

A-6

Viscosity: 10Pa·s, vinyl equivalent: 0.033mmol / g

[0100] (Component (B))

[0101] Organopolysiloxanes having the viscosities and vinyl equivalents shown in Table 2 were used as component (B).

[0102] [Table 2]

[0103] Table 2

[0104]

[0105]

[0106] ...

Embodiment 1

[0117]

[0118] First, the materials shown in Table 4 were kneaded with a kneader to produce a kneaded product.

[0119] [Table 4]

[0120] Table 4

[0121] Organopolysiloxane (A-1) as component (A)

100 copies

Organopolysiloxane (B-1) as component (B)

1.3 parts

[0122] Thereafter, D-1 was added as component (D) such that the amount of D-1 was 5 parts relative to 100 parts of the total amount of components (A) and (B) and component (C) shown in Table 5 , followed by dispersion with a two-roll mill. Then, the materials shown in Table 5 were kneaded with a two-roll mill to produce a kneaded product.

[0123] [table 5]

[0124] table 5

[0125]

[0126] The two kneaded products were further kneaded with a planetary mixer. Thus, an uncured conductive silicone rubber mixture is obtained.

[0127] Next, a mandrel made of stainless steel (SUS304) having a diameter of 6.0 mm was prepared as the mandrel 2 . A primer (trade name: DY35-051, manuf...

Embodiment 2-12

[0138] Elastic rollers of Examples 2-12 were each produced in the same manner as in Example 1, except that Component (A)-Component (E) in Example 1 were changed as shown in Table 6. The same evaluation as in Example 1 was performed.

[0139] Table 6 shows the results.

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Abstract

Provided is an electro-conductive member showing small unevenness of the residual state of charge. The electro-conductive member is an electro-conductive member, comprising: a substrate whose surface is electro-conductive; and an electro-conductive elastic layer provided on the substrate, wherein the elastic layer is obtained by curing a mixture containing the following (A) to (D): (A) an organopolysiloxane having at least two vinyl groups bonded to a silicon atom; (B) an organopolysiloxane represented by the following chemical structural formula (1); (C) a hydrogen polysiloxane having at least two hydrosilyl groups; and (D) carbon black (l, m, and n in the chemical structural formula (1) each independently represent a positive integer).

Description

technical field [0001] The present invention relates to a conductive member usable for a developing member and the like in an electrophotographic apparatus, and a process cartridge and the electrophotographic apparatus. Background technique [0002] The developing member is used to convey the toner in the toner container to the photosensitive member, and to develop an image on the surface of the photosensitive member with the toner by means of a developing electric field formed between the developing member and the photosensitive member. At this time, the opposite charges of the charged toner flow into the surface of the developing member due to the bias applied to the developing blade as the toner regulating member. Since such charges decay in a short time, even when the charges temporarily remain on the surface of the developing member, the charges are moderated until the charges reach the position where the developing member is close to the photosensitive member, that is,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08C08K3/04C08L83/05C08L83/07G03G21/18
CPCC08K3/04G03G15/0818G03G9/16C09D183/04C08G77/20C08G77/12C08L2203/20C08L83/00C08L83/04
Inventor 杉山辽草场隆漆原圣平宇野真史
Owner CANON KK
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