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Low voltage related semi-conductive polymer composite material and preparation method thereof

A composite material and correlation technology, applied in the field of semi-conductive composite material preparation, can solve the problems of volume resistivity change, small resistance change, complex conduction mechanism, etc., to achieve the effect of stable resistance and reducing volume resistivity

Active Publication Date: 2019-02-19
广州德润橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not easy to obtain a material with a small change in resistance and stable performance. In addition, the conductive mechanism is complex, and the rise and fall of the applied voltage will lead to changes in the conductive path, as well as factors such as durable dielectric loss, so that the volume resistivity Significant changes ensued, and it was not easy to resolve

Method used

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  • Low voltage related semi-conductive polymer composite material and preparation method thereof
  • Low voltage related semi-conductive polymer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation of semi-conductive polymer composite material with low voltage dependence

[0031] Raw material parts by weight: 70 parts of methyl vinyl silicone rubber; 30 parts of EPDM rubber; 15 parts of conductive masterbatch; 3 parts of crosslinking agent DCP;

[0032] The conductive masterbatch is prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 80°C for 6 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, in step (1), the amount ra...

Embodiment 2

[0034] Example 2 Preparation of semi-conductive polymer composite material with low voltage dependence

[0035] Raw material parts by weight: 60 parts of methyl vinyl silicone rubber; 40 parts of EPDM rubber; 10 parts of conductive masterbatch; 2 parts of cross-linking agent DCP;

[0036] The conductive master particles are prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 70°C for 8 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 6 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, the amount ratio of...

Embodiment 3

[0038] Example 3 Preparation of low-voltage-dependent semi-conductive polymer composite material

[0039] Ingredients in parts by weight of raw materials: 50 parts of methyl vinyl silicone rubber; 50 parts of EPDM rubber; 20 parts of conductive masterbatch; 5 parts of crosslinking agent DCP;

[0040] The conductive masterbatch is prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 90°C for 5 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, the amount ra...

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Abstract

The invention relates to the technical field of preparation of semi-conductive composite materials, in particular to a low voltage related semi-conductive polymer composite material and a preparationmethod thereof. The composite material is prepared from the following raw materials in parts by weight; 50-90 parts of methyl vinyl silicone rubber, 10-50 parts of ethylene propylene diene monomer, 10-20 parts of conductive masterbatches and 1-5 parts of a crosslinking agent. The volume resistivity of the low voltage related semi-conductive polymer composite material is 0.32*106-0.47*106 omega.cmand is located in a range of a semi-conductive region (namely about 105-109 omega.cm), the resistance is quite stable, and chemical substances which pollute a photosensitive drum do not ooze in an environment at high temperature and high humidity.

Description

Technical field [0001] The invention relates to the technical field of preparation of semi-conductive composite materials, in particular to a semi-conductive polymer composite material with low voltage correlation and a preparation method thereof. Background technique [0002] In recent years, office equipment such as laser printers and laser all-in-ones that use electronic imaging (electrophotographic) imaging principles have been widely used on a large scale. Semi-conductive rubber products such as charging roller (PCR), developing roller (DVR), transfer roller, cleaning roller, transfer belt, etc., as key components, cooperate with the photosensitive drum, toner, and magnetic roller to form a common A toner cartridge called a "toner cartridge." [0003] Since the charging roller, the developing roller and the photosensitive drum are in direct contact, the precious elasticity of the rubber material in the polymer material makes it the best choice. In order to restore clear and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L23/16C08K9/02C08K3/04C08K3/22C08K5/14
CPCC08K2003/2241C08K2201/001C08K2201/011C08L83/04C08L23/16C08K9/02C08K3/04C08K3/22C08K5/14
Inventor 曾昭宇何华明梁剑春刘兰香
Owner 广州德润橡胶制品有限公司
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