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Charge roller and method of producing the same

A charging roller and conductive surface technology, applied in the field of charging roller and its preparation, can solve the problems of charging roller surface roughness reduction, oozing pollution, insufficient conductivity, etc., and achieve reduced roughness, proper elasticity, and good wear resistance Effect

Inactive Publication Date: 2008-05-14
ZHEJIANG DONGYANG CHENGJI ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The charging roller of the present invention adopts two kinds of liquid prepolymers to make polyurethane elastomers, wherein the prepolymer-R liquid includes a conductive substance whose weight percentage is 2-8%, and the prepolymer-P liquid includes its weight percentage It is 50-70% isocyanate, which solves the problem of insufficient conductivity and seepage pollution of the charging roller at low temperature; in addition, a conductive surface layer with a thickness of 10-40 μm is sprayed on the surface of the polyurethane elastomer, so that the charging Reduced surface roughness of the roll and uniform composition distribution

Method used

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  • Charge roller and method of producing the same
  • Charge roller and method of producing the same
  • Charge roller and method of producing the same

Examples

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Embodiment 2

[0050] The dispersant described in Example 2 is made of acrylic copolymer: 35% by weight; propylene glycol methyl ether acetate: 40%; ethylene glycol butyl ether: 25%; the mixed resin is made of Acrylic resin in weight percentage: 65%; isobutyl alcohol: 8%; methyl isobutyl ketone: 7%; the rest is made of xylene; the defoamer is polymerized by silicone resin in weight percentage Substance: 15%; ethyl hydroxyacetate: 8%; ethylene glycol butyl ether: 1.5%; the rest is made of solvent gasoline; the organic solvent is acetone;

Embodiment 3

[0051] The dispersant described in Example 3 is made by weight percentage of acrylic copolymer: 40%; propylene glycol methyl ether acetate: 25%; ethylene glycol butyl ether: 35%; the mixed resin is made of Acrylic resin in weight percentage: 70%; isobutyl alcohol: 7%; methyl isobutyl ketone: 8%; the rest is made of heavy aromatic hydrocarbons; the defoamer is polymerized by silicone resin in weight percentage Substance: 20%; ethyl hydroxyacetate: 7%; ethylene glycol butyl ether: 1%; the rest is made of solvent gasoline; the organic solvent is methyl ethyl ketone;

Embodiment 4

[0052] The dispersant described in Example 4 is made of acrylic copolymer: 45% by weight; propylene glycol methyl ether acetate: 30%; ethylene glycol butyl ether: 25%; the mixed resin is made of Acrylic resin in weight percentage: 75%; isobutyl alcohol: 10%; methyl isobutyl ketone: 5%; the rest is made of a mixture of toluene and xylene; the defoamer is made by weight percentage It is silicone resin polymer: 25%; ethyl hydroxyacetate: 6%; ethylene glycol butyl ether: 1%; the rest is made of solvent gasoline; the organic solvent is acetone;

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Abstract

The invention relates to a charging roller and a preparation method thereof. The charging roller comprises a metal shaft, on which a polyurethane elastomer is bonded, and a conductive surface layer with a thickness of 10-40 μm is sprayed on the surface of the polyurethane elastomer. , the polyurethane elastomer is made of a prepolymer-R liquid and a prepolymer-P liquid, and the prepolymer-R liquid includes a conductive substance with a weight percentage of 2 to 8%; the prepolymer Polymer-P liquid includes isocyanate of 50-70% by weight; the charging roller of the present invention is made of polyurethane material, which has proper elasticity, good wear resistance, good heat resistance, and good chemical stability. It is not easy to produce photosensitive drum contamination, and the compression deformation rate is low.

Description

Technical field [0001] The present invention relates to a charging roller and a preparation method thereof, the charging roller is used in non-magnetic developing devices, such as printers, copiers, fax machines, etc. Background technique [0002] Copiers, printers, and fax machines use a charging roller to charge and expose the photosensitive drum to form an electrostatic latent image, and then transfer toner to the electrostatic latent image part of the photosensitive drum through the developing roller, and the toner image is transferred to the paper to be heated and formed. Finally print the text image. [0003] There are charging rollers and developing rollers in the toner cartridges of copiers, printers, and fax machines. The charging rollers and developing rollers in the prior art use conductive rubber as conductive elastomer, and then a metal shaft and synthetic rubber are fixed in the rubber elastic body. It is also difficult for the manufacturing method of elastomer to k...

Claims

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Application Information

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IPC IPC(8): G03G15/02B29C39/10B29C39/44B05D5/12C08J7/04C08L75/04
Inventor 陆柏松
Owner ZHEJIANG DONGYANG CHENGJI ELECTRO MECHANICS CO LTD
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