NBR/PVC vs. Nitrile Rubber

Attribute	NBR/PVC	Nitrile Rubber
Chemical Composition	NBR: Acrylonitrile and Butadiene; PVC: Polyvinyl Chloride	Acrylonitrile and Butadiene
Flexibility	Good flexibility	Good flexibility
Resistance to Oil	Good resistance to oil	Excellent resistance to oil
Temperature Range	-30°C to 100°C	-40°C to 120°C
Applications	Automotive seals, gaskets, hoses	Oil seals, fuel hoses, gaskets

Introduction

When it comes to choosing the right material for various applications, it is important to consider the specific attributes of each option. NBR/PVC and Nitrile Rubber are two commonly used materials in various industries due to their unique properties. In this article, we will compare the attributes of NBR/PVC and Nitrile Rubber to help you make an informed decision for your specific needs.

Chemical Composition

NBR/PVC is a blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC). NBR is a synthetic rubber copolymer of acrylonitrile and butadiene, known for its excellent oil resistance and durability. PVC, on the other hand, is a thermoplastic polymer known for its chemical resistance and versatility. Nitrile Rubber, on the other hand, is a synthetic rubber copolymer of acrylonitrile and butadiene, similar to the NBR component of NBR/PVC. However, Nitrile Rubber does not contain PVC and is a standalone material.

Physical Properties

Both NBR/PVC and Nitrile Rubber exhibit excellent resistance to oils, fuels, and chemicals, making them ideal for applications where exposure to such substances is common. They also have good abrasion resistance, flexibility, and low-temperature performance. However, NBR/PVC tends to have better weathering resistance compared to Nitrile Rubber, making it suitable for outdoor applications where exposure to sunlight and harsh weather conditions is a concern.

Mechanical Properties

When it comes to mechanical properties, NBR/PVC and Nitrile Rubber have similar tensile strength and tear resistance. They both offer good compression set properties, making them suitable for sealing applications where resilience is important. However, NBR/PVC may have slightly better elongation at break compared to Nitrile Rubber, providing more flexibility in certain applications.

Temperature Resistance

Both NBR/PVC and Nitrile Rubber have good temperature resistance, with the ability to withstand a wide range of temperatures. NBR/PVC can typically handle temperatures ranging from -20°C to 100°C, while Nitrile Rubber can withstand temperatures from -40°C to 120°C. This makes Nitrile Rubber slightly more versatile in terms of temperature range compared to NBR/PVC.

Cost and Availability

In terms of cost and availability, NBR/PVC is generally more cost-effective and readily available compared to Nitrile Rubber. This is due to the fact that NBR/PVC is a blend of two materials, which can help reduce production costs. Nitrile Rubber, being a standalone material, may be slightly more expensive and less commonly found in the market. However, the specific requirements of your application may dictate which material is more suitable, regardless of cost.

Applications

NBR/PVC and Nitrile Rubber are both used in a wide range of applications across various industries. NBR/PVC is commonly found in automotive seals, gaskets, hoses, and O-rings due to its excellent oil resistance and durability. Nitrile Rubber is also used in similar applications, as well as in industrial gloves, footwear, and conveyor belts. The choice between NBR/PVC and Nitrile Rubber will depend on the specific requirements of the application, such as temperature range, chemical exposure, and mechanical properties.

Conclusion

In conclusion, both NBR/PVC and Nitrile Rubber offer unique properties that make them suitable for a variety of applications. While NBR/PVC may have better weathering resistance and cost-effectiveness, Nitrile Rubber offers a wider temperature range and versatility. Ultimately, the choice between NBR/PVC and Nitrile Rubber will depend on the specific needs of your application and the attributes that are most important for its success.