How to design the formulation of the conductive rubber

by:Keyuan     2020-12-05
Resistivity under 10 ^ 4 Ω rubber called conductive rubber. Conductive rubber not only has the high elasticity of rubber, easy processing and forming, characteristics of light weight, small volume, and conductive performance is similar to metal. With the rapid development of electronic industrial materials, conductive polymer materials is becoming more and more widely. Production of conductive rubber products, generally choose dielectric constant of raw rubber, such as silicone rubber, neoprene, nitrile rubber, etc. Silicone rubber is made of conductive rubber products is good material. It not only has the properties of conductive, high and low temperature resistance, ageing resistance, and process performance is good, suitable for manufacturing complex shape, the structure of tiny conductive rubber products; Can connect equipment used in electrical appliances, and the interface fit closely, accurate and reliable, flexible and can have the effect of shock absorption and seal. Also according to the using conditions of the product material selection, for example, in contact with the oil phase used in the environment of the conductive rubber had better choose oil resistant rubber, nitrile rubber, such as chlorohydrin rubber, neoprene and so on. Rubber and or rubber/plastic can also be used in the manufacture of conductive rubber. EPDM or IIR and can improve the insulation (PE Such as dielectric strength) , PS/EPDM, PS/PBD, NBR/EPDM, NBR/IR, NR, CR, etc. And, with the right amount of hard rubber phase that conductive network structure is more compact, or through such as carbon black conductive compound in incompatible rubber for enrichment of phase interface area, thereby improving conductive performance. Therefore by using his rubber and rubber can be used in a less packing the conductive effect, required for rubber processing flow, and reduce the hardness of vulcanized rubber. The conductivity of conductive rubber greatly depends on the variety and dosage of conductive filler, filler type, dosage is very important to the conductivity of rubber products. Commonly used conductive rubber filler has a particle of carbon black, carbon fiber filling agent and metal conductive fillers, such as gold, platinum, silver, copper, nickel and other fine powder and flake, foil or processed into metal fibre material, etc. These conductive filler can provide electrical conductivity, enhance the mechanical strength, fatigue resistance of vulcanized rubber aging durable performance. When conducting filler particles after reaching a certain value, the conductivity a jump occurs, a surge in several or a dozen orders of magnitude. Conductive fillers reach or exceed a critical value, the conductive filler filled rubber becomes a conductive rubber. The critical value of composite materials in the critical value of conductive filler particles began to form a conductive path.
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