FC 70 is a type of synthetic rubber elastomer and is also known as Nitrile Butadiene Rubber (NBR), Buna-N, Perbunan and Acrylonitrile Butadiene. It is commonly used in the automotive industry, for fuel and oil hoses, seals, gaskets, O-rings and other rubber components. It is also used in the food and pharmaceutical industries, as well as for printing blankets and in the production of lacquer.
When rubber components are exposed to FC 70, common types of failure include swelling, hardening, softening, discoloration and cracking. Swelling occurs when the rubber absorbs the chemical, making it too soft and reducing its tear and tensile strength. Hardening occurs when the rubber component becomes brittle, reducing its elasticity and flexibility. Softening occurs when the rubber component loses its shape and becomes sticky. Discoloration occurs when the rubber component changes color due to the chemical reacting with the rubber's components. Lastly, cracking occurs when the rubber component weakens and breaks apart due to the chemical reacting with the rubber's components.
Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.
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