Why is NBR commonly used as the material for oil-resistant rubber flexible joints?

It is indeed true that NBR is commonly used as the material for oil-resistant Rubber Expansion Joints. This is because NBR possesses excellent oil resistance, particularly against mineral oils, liquid fuels, solvents, and animal and vegetable oils. Its oil resistance surpasses that of natural rubber, neoprene, and styrene-butadiene rubber (SBR), making it highly suitable for manufacturing oil-resistant Rubber Flexible Joint. NBR is a synthetic rubber copolymerized from butadiene and acrylonitrile. The presence of nitrile groups in its molecular chain structure endows NBR with good stability against nonpolar and weakly polar oils. In comparison, other types of rubber, such as natural rubber, neoprene, and SBR, do not perform as well as NBR in terms of oil resistance. Additionally, NBR boasts good wear resistance, heat resistance, chemical stability, and excellent processability. When selecting the material for oil-resistant Rubber Soft Joint, in addition to considering oil resistance, other performance indicators such as temperature resistance, aging resistance, and compression resistance should also be taken into account to ensure that the product can meet specific application requirements. Furthermore, NBR also exhibits good wear resistance, heat resistance, strong adhesion, as well as good water resistance, airtightness, and excellent bonding properties. These characteristics make NBR an ideal material for fabricating oil-resistant Rubber Flexible Expansion Joint. In practical applications, oil-resistant flexible Rubber Expansion Joint is often used in pipeline systems for various media such as petroleum, lubricating oils, and refined oil products to compensate for installation errors, prevent deformation caused by thermal expansion and contraction, and ensure the safe operation of the pipeline system.