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Charge roller and method of producing the same

A charging roller and conductivity technology, applied in the field of charging roller and its preparation, can solve the problems of exudation pollution, insufficient conductivity, and reduced surface roughness of the charging roller, and achieve a reduced surface, reduced roughness, and uniform distribution of components. Effect

Inactive Publication Date: 2009-11-11
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

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Embodiment 2

[0050] Dispersant described in embodiment 2 is by weight percentage and is acrylic acid copolymer: 35%; Propylene glycol methyl ether acetate: 40%; Ethylene glycol butyl ether: 25% make; Described mixed resin is made of Acrylic resin by weight percentage: 65%; Isobutyl alcohol: 8%; Methyl isobutyl ketone: 7%; the rest is made of xylene; the defoamer is polymerized by weight percentage Ethyl glycolate: 8%; Ethyl glycol butyl ether: 1.5%; the rest is made of solvent gasoline; the organic solvent is acetone;

Embodiment 3

[0051] Dispersant described in embodiment 3 is by weight percent acrylic acid copolymer: 40%; Propylene glycol methyl ether acetate: 25%; Ethylene glycol butyl ether: 35% make; Described mixed resin is made of Acrylic resin by weight percentage: 70%; Isobutyl alcohol: 7%; Methyl isobutyl ketone: 8%; the rest is made of heavy aromatics; the defoamer is polymerized by weight percentage Ethyl glycolate: 7%; Ethyl glycol butyl ether: 1%; the rest is made of solvent gasoline; the organic solvent is butanone;

Embodiment 4

[0052] Dispersant described in embodiment 4 is by weight percent acrylic acid copolymer: 45%; Propylene glycol methyl ether acetate: 30%; Ethylene glycol butyl ether: 25% make; Described mixed resin is made of Acrylic resin by weight percentage: 75%; Isobutyl alcohol: 10%; Methyl isobutyl ketone: 5%; The rest is the mixing of toluene and xylene; Silicone resin polymer: 25%; ethyl glycolate: 6%; butyl glycol ether: 1%; the rest is made of solvent gasoline; the organic solvent is acetone;

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Abstract

The invention relates to a charge roller and a preparation method thereof. The charge roller comprises a metallic axle. The metallic axle is adhered with a polyurethane elastomer. The surface of the polyurethane elastomer is coated with a conductive surface layer the thickness of which is 10 to 40Mum. The polyurethane elastomer is made of prepolymer-R solution or prepolymer-P solution. The prepolymer-R solution contains conductive substances the weight percentage of which is 2 to 8 percent. The prepolymer-P solution comprises TDI the weight percentage of which is 50 to 70 percent. The charge roller of the invention is made of prepolymer materials. Therefore, the invention has the advantages of proper elasticity, good wear resistance, good heat resistance, good chemical stability and low compression deformation rate and is not likely to pollute the OPC drum.

Description

technical field [0001] The 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 facsimile machines charge and expose the photosensitive drum through the charging roller to form an electrostatic latent image, and then transfer the toner to the electrostatic latent image part on the photosensitive drum through the developing roller, and the toner image is transferred to the paper to be heated and shaped to form 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 to make conductive elastomers, and then a metal shaft is fixed in the rubber elastic body. Synthetic rubber It is also difficult to keep the distribution of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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