Rubber composition and conductive roller using the same

A rubber composition, a technology of a conductive roller, applied in the direction of the electric recording process applying the charge pattern, the conductive paint, the equipment of the electric recording process applying the charge pattern, etc. problems such as degradation of stability, and achieve the effect of excellent image durability and high flexibility

Active Publication Date: 2019-12-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] If the flexibility of the roller body decreases and the durability of the image decreases, the image quality of the formed image tends to gradually decrease during repeated image formation.

Method used

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  • Rubber composition and conductive roller using the same
  • Rubber composition and conductive roller using the same
  • Rubber composition and conductive roller using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0201] As a rubber, adjust the Mooney viscosity ML 1+4 (100°C) is EPDM below 10 [Mitsui EPT X-4010M manufactured by Mitsui Chemical Co., Ltd. mentioned above, Mooney viscosity ML 1+4 (100° C.): 8, ethylene content: 54%, diene content: 7.6%, non-oil-extended] 30 parts by mass, and NBR as a diene rubber [JSR N250SL manufactured by JSR Co., Ltd. proposed above, Low Nitrile NBR, Nitrile Content: 19.5%, Mooney Viscosity ML 1+4 (100°C): 43, non-oil-extended] 70 parts by mass.

[0202] Then, using a Banbury mixer, 100 parts by mass of the total amount of both rubbers was masticated, and firstly, each component shown in Table 1 below was added and kneaded.

[0203] [Table 1]

[0204] Table 1

[0205] Element parts by mass Crosslinking Auxiliary 2.5 carbon black 21 Processing aids 0.5

[0206] Each component in Table 1 is as follows. In addition, the parts by mass in Table 1 are parts by mass relative to 100 parts by mass of the total amount of r...

Embodiment 2

[0225] As the diene rubber, the same amount of SBR [JSR1502 manufactured by JSR Co., Ltd. proposed above, styrene content: 23.5%, Mooney viscosity ML 1+4(100° C.): 52, non-oil-extended] A rubber composition was prepared in the same manner as in Example 1, and a conductive roller was produced.

Embodiment 3

[0227] As the diene rubber, use the same NBR 40 parts by mass as in Example 1 and 30 parts by mass of SBR as in Example 2, except that a rubber composition was prepared in the same manner as in Example 1 to produce a conductive roll.

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PUM

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Abstract

The invention provides a rubber composition and a conductive roller using the same. The rubber composition is possible to form a conductive roller having a roller main body having a higher flexibilitythan in the current situation and having excellent image durability while maintaining the volume resistivity of a roller main body in a range suitable for a developing roller and the like. The rubbercomposition contains rubbers including 15 parts by mass or more of an EPDM having a Mooney viscosity ML1+4 (100 DEG C.) of 10 or less with respect to 100 parts by mass of the total amount of rubbersand a diene rubber, and less than 25 parts by mass of carbon black with respect to 100 parts by mass of the total amount of rubbers. A conductive roller has a roller main body constituted by the rubber composition.

Description

technical field [0001] The present invention relates to a rubber composition and a conductive roller including a roller body formed using the rubber composition. Background technique [0002] For example, in an image forming apparatus using electrophotography such as a laser printer, an electrostatic copier, a plain paper facsimile apparatus, or a composite machine thereof, in order to develop an electrostatic latent image formed on the surface of a photoreceptor into a toner image, the Developing roller. [0003] In the development using the developing roller, the developing roller is rotated in a state in which the front end of the amount regulating blade (charging blade) is in contact with the outer peripheral surface of the roller body in a developing section for storing toner in the image forming apparatus. [0004] In this way, the toner is charged and attached to the outer peripheral surface of the roller body, and the amount of the toner attached is limited when pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L9/02C08L23/16C08K13/02C08K3/22C08K3/04C08K5/098C08J3/24C08J7/04C09D5/24G03G15/08
CPCC08J3/246C08J7/04C09D5/24G03G15/0808G03G15/0818C08J2309/06C08J2309/02C08J2423/16C08K13/02C08K3/04C08K5/098C08K2201/014C08K2003/2296F16C13/00F16C2208/00F16C2324/16C08L9/02C08L9/06C08L23/16C08K3/22C08K3/06C08K5/40C08K5/47C08L2205/03F16C2208/10C08L2205/025
Inventor 铃木大二朗
Owner SUMITOMO RUBBER IND LTD
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