NBR (Acrylonitrile-Butadiene Rubber)

Acrylonitrile butadiene rubber (NBR)

• NBR is a copolymer made of acrylonitrile and butadiene, whose physical properties change depending on the acrylonitrile content (18 - 50%). The higher the acrylonitrile content, the higher the resistance to oil and fuel, but the elasticity of rubber and the permanent reduction rate of low pressure become reduced on the contrary. Due to these opposite properties, they are usually manufactured to contain medium acrylonitrile content.
• NBR has relatively unsatisfactory weather resistance and ozone resistance, but has superior mechanical properties and abrasion resistance compared to other elastomers.

Application

• It is widely used in automotive and other seal materials and is the best rubber material for performance, machinability, and price balance. It is the most ideal for o-rings, v-packing, and oil seals for lubricating oil, hydraulic fluid, and fuel oil in all areas, including air hydraulic and pneumatic equipment, automobiles, ships, aircraft fuel systems, construction equipment, hydraulic oil, and kitchenware. Furthermore, its high content of nitrile is not only good for heat resistance or mechanical properties, but it is also good for gas permeability, and thus, it is sufficient for any use in vacuum.

Property table of materials (ASTM D2000)