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Charging roll used for laser printing machine and its manufacturing method

A technology of laser printers and charging rollers, applied in the direction of circuits, applications, electrical components, etc., can solve problems such as degradation and softening of the silicone rubber conductive elastic layer, and achieve good bite, clear images, and moderate elasticity.

Inactive Publication Date: 2003-12-03
广州市刘氏橡塑制品有限公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a charging roller for laser printers, which solves the problem that the silicone rubber conductive elastic layer becomes soft and degrades. Its conductive elastic layer has uniform volume resistivity, and it has uniform volume resistivity when it is used in image forming equipment. Surface charge, the performance of the charging roller is further improved, while greatly reducing the cost of the product; another object of the present invention is to provide a manufacturing method for this charging roller

Method used

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  • Charging roll used for laser printing machine and its manufacturing method

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Embodiment Construction

[0030] Such as figure 1 The shown charging roller for a laser printer includes a metal core 1, an adhesive layer 5 on the outer peripheral surface of the metal core 1 bonded with a low-hardness conductive silicone rubber elastic layer 2, and the low-hardness conductive silicone rubber The adhesive layer 5 on the outer peripheral surface of the elastic layer 2 adheres the conductive fluorine paint protective layer 4 .

[0031] The low-hardness conductive silicone rubber elastic layer: select 100 parts by weight of silicone rubber with a molecular weight of 500,000-600,000, reinforce with 15 parts by weight of white carbon black, use 0.6-0.8 parts by weight of 2,5-dimethyl 2, 5 bis(tert-butyl peroxy) hexane crosslinking, kneading into rubber compound; 100 parts by weight of rubber compound, plus 8-9 parts by weight of conductive carbon black, 6-10 parts by weight of graphite Refined into a low-hardness conductive silicone rubber elastic layer material, the resistance value is c...

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Abstract

A charge roller for laser printer is composed of a metallic core, a low-hardness electrically conducting elastic silica rubber layer stuck on the surface of metallic core, and an electrically conductive fluorine paint layer as protecting layer. The said elastic silica rubber layer is prepared from silica rubber, white carbon black for reinforcing and 2,5-dimethyl-2,5-bis (tert-butyl peroxy) hexane through cross-linking, pugging, adding electrically conductive carbon black and grahite, and refining. Its advantages are not softening and degradating, and low cost.

Description

technical field [0001] The present invention relates to a charging roller for a laser printer and a manufacturing method thereof. Background technique [0002] The charging roller of the existing laser printer is formed by forming a layer of low-hardness silicone rubber coating on the surrounding surface of the metal mandrel, and then coating the outer layer with a fluorocarbon resin coating. This type of fluorocarbon resin-coated charging roller Excellent heat resistance is required because they are used to fix the toner at a high temperature exceeding 200°C, and since the silicone rubber of the underlying portion is protected from contact with the air by the fluorocarbon resin coating, this tends to cause depolymerization, leading to until the hardness is lowered, uneven hardness and other problems are generated, furthermore, when the method of providing a fluorocarbon resin coating on the roll surface is based on a method involving coating of a fluorocarbon resin latex an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D22/00B32B1/08G03G15/02
Inventor 刘义波
Owner 广州市刘氏橡塑制品有限公司
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