Nitrile rubber(丁腈橡胶)is a high-performance elastomer that is widely favored for its excellent oil resistance.Whether in industrial sealing,automotive parts,or food processing equipment,NBR sheets demonstrate outstanding oil resistance.But why is NBR oil-resistant?What is its oil resistance performance like?This article will provide you with a detailed analysis.
1.The Principle of Nitrile Rubber’s Oil Resistance
Nitrile rubber is a high-molecular material copolymerized from acrylonitrile(ACN)and butadiene.Its oil resistance mainly stems from the polar molecular structure of acrylonitrile:
Polar molecular characteristics:The polarity of acrylonitrile enables it to resist the erosion of non-polar oils and solvents.
Cross-linked structure:The molecular chains of nitrile rubber form a stable three-dimensional network structure through vulcanization,further enhancing its oil resistance and mechanical strength.
2.The Performance of Nitrile Rubber’s Oil Resistance
Nitrile rubber sheets exhibit excellent oil resistance in various oils and solvents:
Petroleum-based oils:Such as engine oil,diesel,and lubricating oil,NBR sheets are almost unaffected.
Fuel oils:Suitable for sealing components in gasoline and biodiesel fuel systems.
Greases and lubricants:Stable in the sealing and protection of mechanical equipment.
It should be noted that NBR has poor resistance to polar solvents(such as ketones and esters),so the material selection should be evaluated based on specific working conditions.
3.Key Factors Affecting Oil Resistance
The oil resistance of NBR sheets is influenced by the following factors:
Acrylonitrile content:The higher the acrylonitrile content,the stronger the oil resistance,but the low-temperature performance will decline.
Vulcanization system:An optimized vulcanization process can increase the cross-link density of the rubber,enhancing its oil resistance.
Additives:The choice of fillers and plasticizers also affects its oil resistance performance.
4.Application Areas of Nitrile Rubber’s Oil Resistance
With its excellent oil resistance,NBR sheets are widely used in the following fields:
Automotive industry:For fuel system seals,oil pan gaskets,hydraulic system seals,ETC.
Mechanical equipment:As sealing materials for hydraulic presses,泵,and valves to prevent oil leakage.
Food processing:FDA-certified NBR sheets can be used for sealing in edible oil equipment.
Aerospace:在燃料和润滑油环境中提供可靠的密封性能.
Nitrile rubber sheets,具有出色的油性,通过了解其石油抵抗原则，已成为工业密封和保护领域的首选材料,表现,和应用程序方案,用户可以更好地选择合适的NBR床单来满足特定的工作条件。,NBR纸无疑是理想的选择.
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