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Developing member, manufacturing process therefor and electrophotographic image-forming apparatus

A technology for developing components and molecules, which is 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., and can solve problems such as unevenness and stripes

Active Publication Date: 2014-04-30
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, defects such as unevenness and streaks may occur at positions corresponding to parts of the electrophotographic image of the developing member undergoing compression set

Method used

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  • Developing member, manufacturing process therefor and electrophotographic image-forming apparatus
  • Developing member, manufacturing process therefor and electrophotographic image-forming apparatus
  • Developing member, manufacturing process therefor and electrophotographic image-forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] (Production of Elastic Roller 1)

[0093] The surface of a mandrel with a diameter of 6 mm plated with nickel on the iron surface was coated with a primer (trade name: DY35-051, produced by Dow Corning Toray Co., Ltd.), after which the primer was baked at a temperature of 170° C. 20 minutes. Then, the mandrel was put into a mold having a cylindrical tube with an inner diameter of 12 mm and pieces (pieces) for holding the mandrel provided at both ends of the tube, and used for forming elastic The liquid material of the layer was injected from the piece at one end and then heated at 130° C. for 20 minutes.

[0094] After cooling, the resultant was taken out from the mold to obtain a primary cured elastic roller in which an elastic layer having a thickness of 3.0 mm was provided on the outer periphery of the mandrel. Furthermore, the roll was heated in a furnace at 200° C. for 2 hours to obtain an elastic roll 1 .

[0095] [Table 1]

[0096] Table 1 (Materials constitu...

Embodiment 2

[0131] In addition to further adding 1.5 parts by mass of hydrophobic silica (trade name: RX200, produced by Nippon Aerosil Co., Ltd.) to the material constituting the liquid material for forming the elastic layer of Example 1 in Example 1, with The developing roller 2 was produced in the same manner as in Example 1, and was measured and evaluated in the same manner as in Example 1. Table 2 shows the results.

Embodiment 3

[0133] The developing roller 3 was produced in the same manner as in Example 2 except that the following (B2) was used instead of (B1) in Example 2, and measured and evaluated in the same manner as in Example 1. Table 2 shows the results.

[0134] (B2): contains CH 2 =CH(CH 3 ) 2 SiO 1 / 2 unit, (CH 3 ) 3 SiO 1 / 2 Cell and SiO 4 / 2 The constituent unit of the unit, CH 2 =CH(CH 3 ) 2 SiO 1 / 2 unit and (CH 3 ) 3 SiO 1 / 2 The total amount of unit and SiO 4 / 2 An organopolysiloxane having a molar ratio of units of 0.5, a weight average molecular weight of 6,600, and an average of 4 vinyl groups bonded to silicon atoms in one molecule.

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PUM

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Abstract

Provided is a developing member which is less susceptible to compression set. A developing member which comprises a substrate, an elastic layer provided on the substrate, and a cover layer provided on the elastic layer, wherein the elastic layer comprises a cured product of a mixture comprising the components (A) to (D): (A) an organopolysiloxane that contains, in one molecule, two or more vinyl groups bonded to silicon atoms and that exhibits a viscosity of 10 to 100Pas at 25 DEG C; (B) an organopolysiloxane that is composed of constituent SiO4 / 2 units and constituent R1R2R3SiO1 / 2 units wherein R1, R2 and R3 are methyl or vinyl and that contains, in one molecule, two or more vinyl groups bonded to silicon atoms; (C) an organohydrogen- polysiloxane that contains, in one molecule, two or more hydrogen atoms bonded to silicon atoms; and (D) carbon black.

Description

technical field [0001] The present invention relates to a developing member and an electrophotographic image forming apparatus used in electrophotographic image forming apparatuses such as copiers, laser beam printers, facsimiles, and printers using electrophotography. Background technique [0002] In electrophotographic apparatuses in recent years, apparatuses each utilizing a non-magnetic one-component contact development system have begun to be used in more cases accompanying body miniaturization and colorization. The non-magnetic one-component contact development system is the following method involving the use of a non-magnetic one-component toner. The toner is supplied onto the developing member by the toner supply roller in contact with the developing roller, and by the friction between the developing blade as a toner regulating member and the toner and between the developing member and the toner The friction of the toner charges the toner. At the same time, the ton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0818G03G2215/0129Y10T428/31598Y10T428/31663
Inventor 草场隆漆原圣平杉山辽宇野真史
Owner CANON KK