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Kevlar is the registered trade mark of a para-aramid (aromatic polyamide) fiber produced by DuPont Chemical Company. Chemists Stephanie Kwolek and Herbert Blades first synthesized Kevlar in 1965, and Kwolek patented the fiber in 1966. Fibers of Kevlar consist of long molecular chains produced from poly-paraphenylene terephthalamide. The chains are highly oriented with strong interchain bonding, which results in a unique combination of properties, including:

Kevlar does not rust nor corrode and is used in bullet proof vests, underwater cables, brake linings, space vehicles, boats, parachutes, skis, and building materials.