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Conductive roll for electrophotographic machine

A conductive roller, electrophotographic technology, applied in corona discharge devices, equipment for electrical recording technology using charge patterns, electrical recording technology applying charge patterns, etc., can solve the problems of rising resistance and large resistance variation, Achieve the effect of reducing resistance variation and excellent resistance stability

Active Publication Date: 2020-11-27
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ion conduction, which is one of the conduction methods, gradually consumes the conductive agent due to the polarization of the charge at the time of energization, resulting in an increase in resistance
In addition, the resistance fluctuation due to the environment is large

Method used

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  • Conductive roll for electrophotographic machine
  • Conductive roll for electrophotographic machine
  • Conductive roll for electrophotographic machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088]

[0089] Taking NBR as 100 mass parts, mix the stearic acid of 0.7 mass parts, the zinc oxide of 5 mass parts, the hydrotalcite of 2 mass parts, the crosslinking agent of 3 mass parts, the carbon black (carbon 2) of 20 mass parts, 2 parts by mass of the coupling agent (coupling agent 1) were stirred and mixed with a mixer to prepare the composition for forming an elastomer layer according to Example 1.

[0090]

[0091] A mandrel (6 mm in diameter) is placed in a forming mold, the above composition is injected, heated at 170° C. for 30 minutes, cooled, demoulded, and a conductive rubber elastic body with a thickness of 1.75 mm is formed on the outer periphery of the mandrel. composed of elastomeric layers.

[0092]

[0093] 100 parts by mass of N-methoxymethylated nylon (manufactured by Nagase Fine Chemical Co., Ltd., "EF30T"), 60 parts by mass of conductive tin oxide (manufactured by Mitsubishi Materials Corporation, "S-2000"), 30 A surface layer forming composi...

Embodiment 2～4

[0095] A charging roller was produced in the same manner as in Example 1 except that the compounding amount of the coupling agent 1 was changed in the preparation of the composition for forming an elastomer layer.

Embodiment 5～6

[0097] A charging roller was produced in the same manner as in Example 1, except that the amount of carbon black (Carbon 2) blended in the preparation of the composition for forming an elastomer layer was changed.

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Abstract

Provided is a conductive roll for an electrophotographic machine, the conductive roll having excellent resistance stability over a long period of time when a rotational load is applied to an electroconductive elastic body layer. This conductive roll 10 for an electrophotographic machine is provided with: a shaft body 12; and an elastic body layer 14 formed on the outer periphery of the shaft body12, wherein the elastic body layer 14 is a crosslinked body of a composition containing a diene-based polymer (a), a crosslinking agent (b), a carbon black (c), and a coupling agent (d), (b) is a sulfur crosslinking agent or a peroxide crosslinking agent, and the specific surface area of (c) is in the range of 40-300 m<2> / g, and (d) is (d1) or (d2). (d1): Coupling agent having a NHR1 group and a SSO3H group, (d2): Coupling agent having a NHR1 group and a diene structure, where, R1 is H or a hydrocarbon group having 1-8 carbon atoms.

Description

technical field [0001] The present invention relates to a conductive roller for electrophotographic equipment suitable for use in electrophotographic equipment such as copiers, printers, and facsimile machines using electrophotography. Background technique [0002] In electrophotographic equipment such as copiers, printers, and facsimiles using electrophotography, conductive rollers such as charging rollers, developing rollers, transfer rollers, and toner supply rollers are disposed around photosensitive drums. As a conductive roller, a conductive roller having a conductive elastomer layer on the outer periphery of a shaft body composed of a mandrel is known. A conductive agent for conductivity is blended in the elastomer layer. Conductive agents include ion-conductive agents and electron-conductive agents. Ion conduction, which is one of the conduction methods, gradually consumes the conductive agent due to the charge polarization at the time of energization, causing an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/02C08K3/04C08K3/06C08K5/00C08K5/14C08K5/36C08L7/00C08L9/00F16C13/00G03G15/00G03G15/08G03G15/16
CPCC08K3/04C08K3/06C08K5/14C08L7/00C08L9/00F16C13/00G03G15/08G03G15/16G03G15/0233C08K2201/006C08K5/41C08K5/3415C08L15/00C08K5/00
Inventor 柏原伸吉堀内健明乐直树
Owner SUMITOMO RIKO CO LTD
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