Kevlar

n. brand name of a strong heat-resistant aramid fiber developed by DuPont (used in bullet-proof vests, tires, fiber-optic cables, and more)

Kevlar is the DuPont Company's registered trademark for a very light, very strong synthetic fiber created in 1965 by Stephanie Kwolek and Herbert Blades. As a material, Kevlar was first commercially used in the early 1970s; it is spun into ropes or fabric sheets that can be used as such or as an ingredient in composite material components. Currently, Kevlar has many applications, ranging from bicycles to body armor, Military Helmets, Riot Squad Gear etc. because of its high strength-to-weight ratio, "...5 times stronger than steel on an equal weight basis...". Under water, Kevlar is less resistant to ballistic projectiles, although it is water resistant. It is a member of the Aramid family of synthetic fibres and a competitor of the material Twaron, manufactured by Teijin.
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n. Kevlar, brand name of a strong heat-resistant aramid fiber developed by DuPont (used in bullet-proof vests, tires, fiber-optic cables, and more)