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Conductive silicone rubber, conductive rubber-covered roller and production method of conductive rubber-covered roller

A conductive rubber roller and silicone rubber technology, applied in the field of laser imaging, can solve the problems of poor oxidation resistance, high price, uneven dispersion of conductive fillers, etc., and achieve the effect of stabilizing electrical conductivity and improving mechanical properties

Inactive Publication Date: 2017-01-25
SHENZHEN LEPUTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electronically conductive materials such as carbon-based, metal powder, and metal fibers have the advantages of significantly reducing the overall resistivity of silicone rubber, but there are the following problems: such as carbon black, the dispersion of the conductive system is not uniform enough, which affects the resistance drop of the entire conductive silicone rubber. Stability, especially in harsh environments such as high temperature and high humidity or low temperature and low humidity, the stability of the resistance drop is extremely poor, which affects the output quality of the drawing, and due to the problem of the amount added, it is easy to cause problems such as poor mechanical properties and resilience
However, due to the problems of high density, poor oxidation resistance and high price of metal powder and metal fiber, the whole silicone rubber system still has disadvantages such as poor dispersion and unstable electrical conductivity.
[0004] In addition, in the literature published by the Chinese Patent Office, CN105061836A, CN102432929A, and CN104081286A announced that small-molecule ionic salts are used as conductive fillers, mainly using small-molecule salts such as lithium perchlorate and sodium perchlorate. Anion-containing small molecular salts containing fluorine and sulfonyl ions are mainly used as conductive fillers. CN02102325.5 mainly uses small molecular sulfonic acid quaternary ammonium salts or gluconic acid quaternary ammonium salts, but the above patents still have uneven dispersion of conductive fillers , Especially because the above small molecular salts are easy to precipitate on the surface of the main material during use, it is difficult to completely solve the problems of precipitation and hoarfrost on the surface of the main material caused by its addition, so the above system should be applied to the charging of laser printers Roller and developing roller, it is difficult to meet the requirements of high-quality draft printing and high-definition, and it has a great impact on the overall life of the laser printer

Method used

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  • Conductive silicone rubber, conductive rubber-covered roller and production method of conductive rubber-covered roller
  • Conductive silicone rubber, conductive rubber-covered roller and production method of conductive rubber-covered roller
  • Conductive silicone rubber, conductive rubber-covered roller and production method of conductive rubber-covered roller

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preparation example Construction

[0027] The present invention also provides a preparation method for the above-mentioned silicone rubber conductive rubber roller, comprising the steps of:

[0028] Add silicone rubber and ionic liquid polymer in parts by weight to the rubber mixer and stir and mix fully for 0.3h-1.0h, so that the ionic liquid polymer is fully fused with the silicone rubber; then add vulcanizing agent and other fillers in order by weight added, the vulcanization temperature is 100-200°C, and the vulcanization time is 0.5h-5h, and the silicone rubber conductive rubber roller is obtained. Control the inherent resistance of the conductive rubber roller at 10 5 Ω.cm~10 9 In the range of Ω.cm, when the volume inherent resistance is greater than 10 9 When Ω.cm, the electrification supply of the conductive rubber roller decreases, which affects the printing effect. The silicone rubber conductive rubber roller prepared by the invention has the characteristics of good electrical conductivity, good re...

Embodiment 1

[0031] S1 Add 100 parts of methylphenyl vinyl silicone rubber and 2 parts of ionic liquid polymer to the rubber mixer, and the ionic oligomer is selected from:

[0032] (n=12), the degree of polymerization is 12;

[0033] S2 Add 5 parts of vulcanizing agent 2,4-dinitroperoxide benzoyl, 5 parts of carbon black, 10 parts of silicon dioxide and calcium carbonate in the rubber mixing machine in sequence (the ratio of both is 5:3) and mix, and then carry out High-temperature vulcanization treatment, the vulcanization temperature is 150° C., and the vulcanization time is 1.5 h to obtain the silicone rubber conductive rubber roller of the present invention.

Embodiment 2

[0035] S1 Add 100 parts of methyl vinyl silicone rubber and 1.5 parts of ionic liquid polymer to the rubber mixer, and stir and mix for 1 hour. The ionic oligomers are selected from:

[0036]

[0037] Mix according to the ratio of 10:1:3, and the degree of polymerization is 10;

[0038] S2 Add 5 parts of vulcanizing agent benzoyl peroxide, 2 parts of carbon black, and 20 parts of silicon dioxide in the rubber mixing machine, mix them, and then carry out high-temperature vulcanization treatment. The vulcanization temperature is 200 ° C, and the vulcanization time is 2 hours. Silicone rubber conductive rubber roller of the present invention.

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Abstract

The invention provides conductive silicone rubber where 0.01-10% by weight of ionic liquid polymer capable of acting as a conductive filling material is added into silicone rubber base. The conductive rubber-covered roller is made with 100 parts of the silicone rubber, 0.01-10 parts of the ionic liquid polymer, 1-10 parts of a vulcanizing agent, and 1-50 parts of other filling materials. A production method of the conductive rubber-covered roller comprises: adding, by weight parts, the silicone rubber and the ionic liquid polymer into a rubber mixing mill, and stirring and mixing well for 0.3-1.0 h; adding the vulcanizing agent and the other filling materials in sequence, and vulcanizing at 100-200 DEG C for 0.5-5 h. The ionic liquid polymer is introduced to the silicone rubber, and electrical conductivity, thermal stability and mechanical properties of the silicone rubber can be improved; the ionic liquid polymer may form a dense mesh structure in the silicone rubber base, the problems of precipitation and white frost due to migration of micromolecules on the surface of the silicone rubber and other problems are solved, and printer quality is improved.

Description

technical field [0001] The invention belongs to the technical field of laser imaging, and in particular relates to a conductive silicone rubber used in a laser printer, a conductive rubber roller using the conductive silicone rubber and a preparation method thereof. Background technique [0002] With the rapid development of the modern electronics industry, office OA equipment laser printers have also undergone tremendous changes in their performance as the output quality has improved. Therefore, the traditional synthetic rubber on the conductive rubber roller, the key consumable of laser printers, is replaced by silicone rubber with superior performance. Conductive rubber rollers in laser printers mainly include charging rollers and developing rollers. Compared with general conductive rubber, conductive silicone rubber has the advantages of small volume resistivity, low hardness, high temperature resistance, aging resistance, and good processing and manufacturing performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L25/18C08L71/12C08L33/14
CPCC08L83/04C08L2203/20C08L2205/025C08L2205/03C08L2205/035C08L25/18C08L71/12C08L33/14
Inventor 徐秀茹孟鸿袁星羊辉
Owner SHENZHEN LEPUTAI TECH CO LTD