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Developing roller, process cartridge, image forming apparatus and image forming method

一种显影辊、显影剂的技术，应用在应用电荷图形的电记录工艺的设备、轴和轴承、涂层等方向，能够解决差擦除能力、不能够克服条纹、不能降低调色剂组分和成膜组分粘附等问题，达到提高能力、抑制异常图像的效果

Inactive Publication Date: 2017-08-18
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, according to Patent Document 1, when there is much sticking on the member contacting the developing roller, the developing roller has poor wiping ability due to high releasability, and the adhesion of toner components and film-forming components cannot be reduced. attached to the component
Therefore, this developing roller cannot overcome the problem that streaks are generated in the thin toner layer on the developing roller, eventually generating abnormal images such as vertical white streaks on images such as solid images and halftone images

Method used

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  • Developing roller, process cartridge, image forming apparatus and image forming method
  • Developing roller, process cartridge, image forming apparatus and image forming method
  • Developing roller, process cartridge, image forming apparatus and image forming method

Examples

Experimental program
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Effect test

Embodiment 1

[0144] Epichlorohydrin rubber HYDRIN T3106, commercially available from Zeon Corporation, was made of SUS and had a diameter of 8 cm Extruded on a metal shaft (shaft body 22 ) to have a rubber thickness of 4 mm, followed by firing and vulcanization in an environment of 150° C. for 90 minutes. Subsequently, the roll surface was roughly ground with a grinder LEO600-F4L-BME available from Minakuchi Machinery Works Ltd., followed by SZC available from Minakuchi Machinery Works Ltd. at a cooling water temperature of 15° C. at a vibration frequency of 15 Hz. , with a belt contact pressure of 3Mpa, under the fluctuation of the belt contact frequency of 1,675 Hz and at an operating rotation speed of 1,300 rpm, using a tape count (tape count) #30 and finally grinding for 60 seconds to form the elastic layer 23, thereby obtaining a developing roller rubber base.

[0145] Next, as a material for the surface layer 24, fluoroethylene vinyl ether LF-200 (fluoroethylene vinyl ether copolym...

Embodiment 2

[0148] A developing roller of Example 2 was obtained in the same manner as in Example 1, except that it was different from Example 1 in that the belt contact frequency was changed from 1,675 Hz to 900 Hz, and the length of the groove 25 was changed from 50 μm to 95 μm.

Embodiment 3

[0150] A developing roller of Example 3 was obtained in the same manner as in Example 1, except that it was different from Example 1 in that the belt contact frequency was changed from 1,675 Hz to 3,350 Hz, and the length of the groove 25 was changed from 50 μm to 21 μm.

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Abstract

A developing roller which is characterized by comprising a shaft body 22, an elastic layer 23 that is formed on the outer circumference of the shaft body 22, and a surface layer 24 that is formed on the outer circumference of the elastic layer 23, and which is also characterized in that the surface layer 24 is formed of a polyurethane having a film thickness of 0.5-2.0 [mu]m and containing a reaction product of a fluoroethylene vinyl ether copolymer and an isocyanurate form of an isocyanate, and has a groove 25 on the surface, said groove having an angle of 0-30 degrees to the circumferential direction.

Description

technical field [0001] The present invention relates to a developing roller, a process cartridge, an image forming apparatus, and an image forming method. Background technique [0002] As a developing method in electrophotography, a one-component developing method is known. One-component development is known as an inexpensive development method with a simple configuration. In one-component development, it is known that a high linear pressure is required to be applied to the toner with a regulating blade in order to stabilize the transport of charges. [0003] Examples of members used in the developing method include a developing roller. Due to the above factors, the surface of the developing roller is filmed with toner components throughout continuous use and cannot maintain the original state, resulting in degradation of charge transportability, which has been an inherent problem of the one-component developing method. For this problem, a technique of using a highly rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08C08G18/62F16C13/00
CPCG03G15/08C08G18/755C09D175/04C08G18/425C08G18/792G03G15/0818C08G18/6279C08J7/16C08J2371/03C08J2475/04
Inventor 安永英明重里圭一郎
Owner RICOH KK