Developing roller and image forming method employing the same

A developing roller and image technology, which is applied in the direction of electric recording process applying charge pattern, equipment of electric recording process applying charge pattern, electric recording technique, etc. Residual potential, contamination prevention, and scattering prevention effects

Active Publication Date: 2012-06-06
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although many studies have been made as described above, when using a silane coupling agent as in the past, the development roller is affected by the insulating silane coupling agent layer, or the residual potential rises when it is repeatedly used. , as a result, the problem of generating toner overflow, etc. cannot be solved

Method used

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  • Developing roller and image forming method employing the same
  • Developing roller and image forming method employing the same
  • Developing roller and image forming method employing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0295] Hereinafter, although an Example is given and the embodiment of this invention is demonstrated concretely, this invention is not limited to this. In addition, "parts" in the text means "parts by mass".

[0296] [Developing Roller Coating Solution]

[0297] (polyamide resin liquid)

[0298] (1) Production of polyamide resin-containing layer forming material 1

[0299] Polyamide resin (N-1) was mixed with polyurethane resin (Nitsupolan 5199: manufactured by Nippon Polyurethane Co., Ltd.), 30 parts of Ketchien black (carbon black) was mixed, and isopropyl alcohol was added to produce polyamide resin (N-1) 52% by mass (mass % calculated excluding volatile matter such as solvents in the drying process, the same applies hereinafter) polyamide resin-containing layer forming material 1 .

[0300] (2) Production of polyamide resin-containing layer forming material 2

[0301] Polyamide resin (N-3) was mixed with polyurethane resin (Nitsupolan 5199: manufactured by Nippon Poly...

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PUM

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Abstract

The present invention provides a developing roller possessing a surface layer capable of suppressing the residual potential during repetitive use with no damage of interlayer adhesiveness, preventing toner leakage and contaminations caused by adhesion matter on the surface, and preventing developing unevenness because of even toner electrification; and also to provide an image forming method employing the developing roller. Also disclose is a developing roller possessing a conductive shaft, and a resin layer provided around an outer circumferential surface of the conductive shaft, wherein theresin layer possesses a surface layer containing a silicone copolymer resin as a principal component and a layer containing a polyamide resin as a principal component, that is provided immediately below the surface layer.

Description

[0001] technology area [0002] The present invention relates to a developing roller used in an electrophotographic image forming apparatus such as a copier, a printer, a facsimile, and an image forming method using the developing roller. technical background [0003] In an electrophotographic image forming method, an image is usually formed on a transfer sheet through the following steps. That is, by contacting with the electrostatic latent image formed on the electrostatic latent image carrier represented by the electrophotographic photoreceptor, or supplying the charged toner in a non-contact manner, developing to visualize the electrostatic latent image, the electrostatic latent image After the toner image on the carrier is transferred to paper or the like, it is fixed to form a final image. [0004] The development method for forming a toner image on an electrostatic latent image carrier includes a two-component development method using a two-component developer consisti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08
CPCG03G15/0818Y10T428/31551Y10T428/31725Y10T428/31663
Inventor 内野哲小原慎也松谷聪
Owner KONICA MINOLTA BUSINESS TECH INC
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