FPM vs. NBR

Attribute	FPM	NBR
Full Form	Financial Performance Management	Net Book Value
Focus	Performance measurement and analysis	Asset valuation
Usage	Used in financial planning and analysis	Used in accounting and reporting
Key Metrics	Return on Investment, Earnings per Share	Depreciation, Amortization

Introduction

Fluoroelastomers (FPM) and nitrile rubber (NBR) are two commonly used elastomers in various industries due to their unique properties. Understanding the differences between these two materials can help in selecting the right material for specific applications.

Chemical Composition

FPM, also known as Viton, is a synthetic rubber made of fluorine, carbon, and hydrogen atoms. It is known for its excellent resistance to chemicals, oils, and high temperatures. On the other hand, NBR is a synthetic rubber made of acrylonitrile and butadiene. NBR offers good resistance to oils, fuels, and hydraulic fluids.

Temperature Resistance

One of the key differences between FPM and NBR is their temperature resistance. FPM can withstand high temperatures ranging from -20°C to 200°C, making it suitable for applications where heat resistance is crucial. NBR, on the other hand, has a lower temperature resistance compared to FPM, with a range of -40°C to 100°C.

Chemical Resistance

Both FPM and NBR offer good chemical resistance, but FPM excels in this area due to its fluorine content. FPM is highly resistant to a wide range of chemicals, including acids, fuels, and solvents. NBR, while also offering good chemical resistance, may not be as effective as FPM in harsh chemical environments.

Oil Resistance

When it comes to oil resistance, both FPM and NBR are suitable choices. FPM is known for its excellent resistance to oils, fuels, and lubricants, making it a preferred choice for applications in the automotive and aerospace industries. NBR, on the other hand, also offers good oil resistance, but may not be as effective as FPM in certain oil-rich environments.

Compression Set

Compression set refers to the ability of a material to retain its shape after being compressed. FPM has a lower compression set compared to NBR, making it a better choice for applications where sealing performance is critical. NBR, while offering good compression set properties, may not be as effective as FPM in high-pressure applications.

Cost

Cost is another factor to consider when choosing between FPM and NBR. FPM is generally more expensive than NBR due to its superior properties and higher performance in extreme conditions. NBR, being a more economical option, is often preferred for applications where cost is a primary concern.

Conclusion

In conclusion, both FPM and NBR have their own unique attributes that make them suitable for different applications. FPM offers superior temperature resistance, chemical resistance, and compression set properties, making it ideal for high-performance applications. NBR, on the other hand, is a cost-effective option with good oil resistance and chemical resistance. Understanding the differences between these two materials can help in selecting the right elastomer for specific industrial applications.