Low Price Industrial Chloroprene Rubber/Neoprene/EPDM/NBR/Nitrile/SBR Rubber Sheet

Nitrile rubber is mainly used to manufacture oil-resistant rubber products. There are five kinds of acrylonitrile content (%) in nitrile rubber: 42 ～ 46, 36 ～ 41, 31 ～ 35, 25 ～ 30, 18 ～ 24. The higher the content of acrylonitrile, the better the oil resistance, but the lower the cold resistance. It can be used in air at 120 ℃ or oil at 150 ℃ for a long time. In addition, it also has good water resistance, air tightness and excellent bonding performance. It is widely used in making various oil-resistant rubber products, various oil-resistant washers, gaskets, sleeves, flexible packaging, flexible rubber tubes, printing and dyeing rubber rolls, cable rubber materials, etc., and has become an indispensable elastic material in the automobile, aviation, oil, copy and other industries.

NBR has good chemical stability and good processing performance. With the increase of acrylonitrile content in its structure, its relative density increases, the curing rate increases, and the tensile strength increases, but the resilience decreases, and the cold resistance becomes poor. Because the cyano group in NBR is easy to polarize in the electric field, the dielectric property of NBR is reduced, which is semiconductor rubber. NBR can be divided into five categories according to the ACN content: ultra-high, high, medium-high, medium-low acrylonitrile. There are two production methods: continuous polymerization and batch polymerization. The continuous polymerization method is usually used for small variety and large yield production with low consumption. The batch polymerization method is applicable to multiple varieties and small batch production, and the engineering construction consumption is high. [1]

Although nitrile rubber has excellent physical and mechanical properties and processing properties, it is not as good as fluororubber and acrylate rubber in acid gasoline and high temperature (150 ℃) environment for a long time. Therefore, hydrogenated nitrile rubber (HNBR) with excellent performance has been developed. In addition, nitrile rubber and carboxyl nitrile rubber (XNBR) with extremely cold resistance and high purity have also been developed.

Nitrile rubber is one of the most representative rubber with excellent comprehensive properties such as oil resistance, physical and mechanical properties and chemical resistance. Effective use of these properties can make it meet various purposes. Among general adhesives, NBR rubber has far better resistance to benzene, petroleum-based oil and non-polar solvent than NR, SBR, IIR and other non-polar adhesives, and also better than polar CR, but the performance of nitrile rubber's polar solvent and polar oil resistance is not good enough.