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Developing roller

一种显影辊、外周面的技术，应用在显影辊领域，能够解决易产生摩擦热、图像不良、无法可靠地防止调色剂熔融粘着等问题，达到延缓熔融粘着、防止熔融粘着的效果

Active Publication Date: 2013-03-06
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned charging blade has the following problems: frictional heat is easily generated due to friction with the rotating developing roller, the toner and the charging blade are fused and adhered due to the above-mentioned frictional heat, and white streaks called white streaks are easily generated in forming an image. bad image
[0013] However, none of these countermeasures is decisive, and it is impossible to reliably prevent the fusion of the toner to the charging blade and the occurrence of white streaks accompanying it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] (Preparation of rubber composition)

[0131] As the base rubber, 10 parts by mass of SBR (JSR1502 manufactured by JSR Corporation), 20 parts by mass of ECO [Epichlomer (registered trademark) D manufactured by Daiso Corporation, ethylene oxide content 61 mol %], and CR [ Shoprene (registered trademark) WRT] manufactured by Showa Denko Co., Ltd. was blended in 70 parts by mass. The proportion of SBR in the total amount of base rubber was 10% by mass.

[0132] 100 parts by mass of the above-mentioned base rubber in total was kneaded with a Banbury mixer, while adding and kneading components other than the cross-linking component among the components shown in Table 1 below, and finally adding the cross-linking component, and further Kneading was carried out to prepare a rubber composition.

[0133] Table 1

[0134] Element

parts by mass

Ethylenethiourea

0.5

5% oil-extended sulfur

1.2

accelerator DT

0.43

accele...

Embodiment 2

[0151] A developing roller was produced in the same manner as in Example 1 except that SBR was 20 parts by mass, ECO was 20 parts by mass, and CR was 60 parts by mass. The proportion of SBR in the total amount of base rubber was 20% by mass. In addition, the surface roughness Ra of the outer peripheral surface of the roller main body was 1.32 μm as in Example 1.

Embodiment 3

[0153] A developing roller was produced in the same manner as in Example 1 except that SBR was 30 parts by mass, ECO was 20 parts by mass, and CR was 50 parts by mass. The proportion of SBR in the total amount of base rubber was 30% by mass. In addition, the surface roughness Ra of the outer peripheral surface of the roller main body was 1.32 μm as in Example 1.

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PUM

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Abstract

The invention provides a developing roller which can more reliably prevent a color matching agent from melt adhering to charged blades and generation of flowing chalk stripes compared with prior arts. The developing roller 1 includes a roller body 2. At least an outer peripheral surface 5 of the roller body 2 is formed from a rubber composition containing a base rubber. The base rubber contains a styrene butadiene rubber in a proportion of not less than 10 mass % and not greater than 70 mass % based on the overall amount of the base rubber. The outer peripheral surface of the rubber body has a surface roughness Ra of not less than 0.78 [mu]m and not greater than 1.8 [mu]m. The outer peripheral surface 5 can form an oxidation film 6 by utilizing ultraviolet ray irradiation. The color matching agent adhesion of the outer peripheral surface 5 is preferentially 8 Nn-38 Nn.

Description

technical field [0001] The present invention relates to a developing roller used in an image forming apparatus utilizing electrophotography, such as a laser printer, an electrostatic copier, a plain paper facsimile apparatus, and a composite machine thereof. Background technique [0002] In the above-mentioned various image forming apparatuses using the electrophotography method, in order to develop the electrostatic latent image formed by exposing the surface of the charged photosensitive drum into a toner image, a developing roller and a roller that is pressed against the outer peripheral surface of the above-mentioned developing roller can be used. Charged blades (layer-limited blades). [0003] That is, when the developing roller is rotated in the above-mentioned pressure contact state, the toner is charged, and the charged toner adheres to the outer peripheral surface of the developing roller, and the amount of adhesion is limited by the charging blade, so that the tone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0818G03G13/20G03G2215/0861
Inventor 黑田贤一川谷昭彦水本善久
Owner SUMITOMO RUBBER IND LTD
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