First, the basic characteristics of NBR nitrile rubber
NBR is a copolymer of acrylonitrile and butadiene monomer. This material is manufactured mainly by low temperature emulsion polymerization, so it has a series of excellent physical and chemical properties. First of all, it has excellent oil resistance and excellent stability for aliphatic oils and gasoline. Secondly, NBR nitrile butadiene rubber has high wear resistance and can be used for a long time in harsh working environments without easy wear. In addition, it also has good heat resistance, strong adhesion, and good air tightness.
However, any material has its limitations. NBR has relatively poor low temperature resistance, low ozone resistance, and low insulation performance. In addition, its elasticity is slightly lower, which limits its application scope to a certain extent.
Second, the wide application of NBR nitrile rubber
Despite some limitations, NBR nitrile rubber is still widely used in the industrial field. Due to its excellent oil and wear resistance, it is often used to manufacture a variety of oil-resistant rubber products, such as gaskets, oil seals, O-rings, engine hoses, etc. In the automotive, aviation, petroleum, copying and other industries, NBR has become an essential elastic material.
In addition, NBR nitrile rubber also has good water resistance and air tightness, so it is also widely used in the manufacture of waterproof fabrics and improve the finish. At the same time, due to their toughness and hypoallergenicity, nitrile safety gloves have also become the first choice for medical, laboratory, cleaning and inspection industries.
Third, NBR nitrile rubber production process
The production process of NBR mainly includes the steps of raw material preparation, copolymerization, dispersion and gel, filtration and drying, and hot processing. In the raw material preparation stage, it is necessary to mix styrene butadiene rubber and acrylonitrile according to a certain proportion, and add organic solvents for pre-dispersion. Then, in the copolymerization stage, by adding initiator and activator, acrylonitrile and butadiene copolymerized to form nitrile rubber. Finally, after dispersing and gelling, filtration and drying, and hot processing, the dried NBR particles are finally obtained.
Iv. Summary and prospect
NBR nitrile butadiene rubber occupies an important position in the industrial field for its excellent oil resistance and wear resistance. With the continuous progress of science and technology and the continuous development of industry, the performance requirements of NBR nitrile butadiene rubber are becoming higher and higher. In the future, we have reason to believe that through the continuous efforts and innovation of scientific researchers, the performance of NBR will be further improved, and its application fields will be more extensive.