Overview
Nitrile Rubber Extrusion Strip is an elastomeric product made from acrylonitrile-butadiene rubber (NBR), valued for its exceptional resistance to oils, fuels, and chemicals. The extrusion process allows for consistent cross-sectional profiles, making it ideal for sealing and cushioning applications in demanding industrial environments. As a synthetic rubber, NBR offers superior performance compared to natural rubber in petroleum-based fluid exposure scenarios. The material's versatility enables customization through compounding with additives to enhance properties like UV resistance, flame retardancy, or improved low-temperature flexibility.
Physical and Chemical Properties
Nitrile rubber extrusion strips typically exhibit Shore A hardness between 50-90, with tensile strength ranging from 10-30 MPa. The material maintains flexibility across a wide temperature range (-40°C to +120°C), though special formulations may extend this range. Its swelling resistance in mineral oils and fuels is superior to most elastomers. The compound's acrylonitrile content (18%-50%) directly affects its oil resistance and low-temperature performance. Higher acrylonitrile grades offer better oil resistance but reduced flexibility in cold environments. The material also demonstrates good abrasion resistance and moderate resistance to ozone and weathering when properly compounded.
Main Applications
The primary use of nitrile rubber extrusion strips is in sealing systems for automotive and industrial equipment. They serve as door seals, window channels, and trunk seals in vehicles, providing both environmental protection and noise reduction. In industrial settings, they're used for flange gaskets, hydraulic system seals, and conveyor belt wipers. Additional applications include vibration dampening components in machinery, protective edging for metal panels, and custom profiles for food processing equipment (when using FDA-compliant formulations). The material's chemical resistance makes it suitable for fuel handling systems and petroleum industry applications where other elastomers would degrade.
Safety and Storage
Nitrile rubber extrusion strips are generally safe to handle under normal conditions. However, dust from cutting or grinding operations should be controlled to prevent inhalation. The material is not classified as hazardous but may decompose at high temperatures (above 200°C), releasing toxic fumes. For optimal shelf life (typically 3-5 years), store strips in original packaging away from direct sunlight, extreme temperatures, and ozone-generating equipment. Avoid contact with strong oxidizing agents or solvents that may cause swelling or degradation. When bonding or splicing, use only adhesives specifically formulated for nitrile rubber.
B2B Procurement Guide
When sourcing nitrile rubber extrusion strips, specify the following parameters: cross-sectional dimensions (with tolerances), durometer hardness, temperature range requirements, fluid resistance needs (ASTM oil immersion tests), and any special certifications (FDA, UL, etc.). Consider ordering samples for performance testing before large purchases. For cost efficiency, standard profiles are more economical than custom dies. Lead times vary from stock availability to several weeks for custom formulations. Reputable suppliers should provide material certifications and batch traceability. For critical applications, request accelerated aging test data to verify long-term performance.
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