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NITRILE RUBBER

 NITRILE RUBBER





Nitrile rubber is a synthetic polymer. It is produced by a combination of two copolymers, acrylonitrile and butadiene molecules. It is also known as Buna-N or NBR(Nitrile Butadiene Rubber). The Acrylonitrile content of the rubber contains between 15%-40% which determines its properties of the rubber. Nitrile rubber is prepared by either a hot or cold polymerization process using water as the medium.

Properties of NBR

  • The significant property of NBR is its excellent resistance to oils and aromatic solvents. The amount of oil resistance is determined by the percentage of acrylonitrile content. The higher the acrylonitrile content, the better the oil resistance
  • As Acrylonitrile content increases, increase the mechanical properties and less permeable to gases. 
  • With reduced Acrylonitrile content, NBR is more flexible at lower temperatures.
  • NBR exhibits excellent abrasion resistance, resistance to cut, tearing and compression set characteristics
  • NBR maintains its rubbery properties in a wide temperature range,-40°F to 220°F
  • NBR is not suitable for outdoor applications. It is easily attacked by Ozone, Oxygen, Sunlight and weather. These properties can improve by PVC/NBR blends
Applications of NBR
  • Manufacturing of automotive products which contact with oils. Example: Oil seals, O-rings, gaskets, oil-resistant hoses
  • Making of printing rollers in the printing industry that spread inks
  • In the aerospace industry, NBR is used to manufacture the rubber products which resist wide temperature ranges
  • NBR used to the manufacturing of flexible fuel tanks/self-sealing fuel tanks
  • NBR gloves for heavy-duty and medical applications

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