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Kevlar- The Wonder Material Group 6 Leader: Timothy Tan Members: Warren Cheah Alejandro Go Justyn Go
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Kevlar A registered trademark for a para- aramid synthetic fiber patented in 1966 Created by Stephanie Kwolek and Herbert Blades in 1965 for Dupont Company of U.S.A.
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Kevlar Kevlar is an extremely strong material that derives its strength from its weave. It is woven like tiny spider webs.
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Kevlar… A special way of weaving liquid into a solid called aramid weave Aramid fibers like Kevlar are: –Difficult to corrode but maybe slightly corrosive if exposed to chlorine
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Kevlar’s Properties Heat- resistant Flexible No melting point Lightweight so ideal for bulletproof vests Five times stronger than the same weight of steel
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Applications Armor: combat helmet, face mask
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Personal protection: jacket and bulletproof vest
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Sports equipment: bicycle tires, shoes
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Windsurfing sails that can withstand the force of 60 mph winds and do not rip easily are made of Kevlar.
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Under water, Kevlar is 20 times stronger than steel. These Kevlar cables are supporting a sonar facility that the U.S. Navy uses to find out how much noise submarines make.
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Other applications of Kevlar Audio equipment: loudspeaker cones Ropes and cables Building construction: used in Montreal’s Olympic Stadium Brakes: brake pads
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Sources: http://www.wisegeek.com/what-is-kevlar.htm http://www.lbl.gov/MicroWorlds/Kevlar/ http://www2.dupont.com/Kevlar/en_US/index.html http://inventors.about.com/library/inventors/blkevlar.htm http://www2.dupont.com/Kevlar/en_US/uses_apps/other_uses. html http://www.gizmag.com/wire-frame-bike-carbon-fiber-kevlar- cables/11187/http://www.wisegeek.com/what-is-kevlar.htm http://www.lbl.gov/MicroWorlds/Kevlar/ http://www2.dupont.com/Kevlar/en_US/index.html http://inventors.about.com/library/inventors/blkevlar.htm http://www2.dupont.com/Kevlar/en_US/uses_apps/other_uses. html http://www.gizmag.com/wire-frame-bike-carbon-fiber-kevlar- cables/11187/ http://www.ideafinder.com/history/inventors/kwolek.htm
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