KEVLAR By: 7B Group 6 Jeremy Gemzontan Jan Hobie Sinfuego Rafael Tan Dwight Ong Miguel Pingol.
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Transcript of KEVLAR By: 7B Group 6 Jeremy Gemzontan Jan Hobie Sinfuego Rafael Tan Dwight Ong Miguel Pingol.
KEVLAR
By: 7B Group 6Jeremy GemzontanJan Hobie Sinfuego
Rafael TanDwight Ong
Miguel Pingol
KEVLAR
• Kevlar was created by Stephanie Kwolek, a researcher at DuPont Company.
• Made of polymer.• Used for bulletproof vests,
underwater cables, brake linings, space vehicles, boats and parachutes.
KEVLAR
•Has a tensile strength-to-weight ratio that is 5 times stronger than steel.
•Is lightweight, making it a very useful material for many things.
POLYMER
•Polymer is a large molecule that is made of repeated structural units.
•Polymer is not only limited to plastics but actually covers many different materials.
Physical Properties
• Kevlar does not have a melting point as the polymer disintegrates before it can melt.
• Very strong, 5 times stronger than steel in fact.
• Has a density of 1.44.• It insulates electricity.• It also insulates heat.
PRODUCTION
• A variety of chemicals are mixed together to which it will form a liquid-crystalline behavior.
• The chemical is then spun and waved with fibers to make a form of fabric which can then be cut and formed into different things.
PRODUCTION
• Producing Kevlar is very expensive because Kevlar is very hard to cut and weave and since it is 5 times stronger than steel.
• That means that to cut it, they need a material that is equal or greater than the strength of Kevlar.
STEPHANIE KWOLEK
• Was born in New Kingston, Pennsylvania in 1923.
• Graduated in 1946 from Carnegie-Mellon University.
• Invented Kevlar in the early 1960s.• DuPont Company started developing it
in 1965.• Inducted into the National Inventors
Hall of Face in 1995.
TIMELINE• 1965 Stephanie Kwolek, a DuPont research scientist, develops
Kevlar® by spinning fiber from liquid crystalline solutions.• 1970 DuPont research scientist Herb Blades develops the
revolutionary air gap spinning process, which enables large-scale production of Kevlar® brand fiber.
• 1971 DuPont begins producing Kevlar® in large quantities in Richmond, VA.
• 1975 First field trial of body armor made with DuPont™ Kevlar® conducted with police officers and sponsored by the National Institute of Justice.
• 1975 First officer inducted into the IACP/DuPont™ Kevlar Survivors' Club®
• 1978 DuPont™ Kevlar® adopted by the U.S. Army for use in flak jackets and PASGT helmets .
• 1981 The U.S. Military specifies that protective apparel be worn by its personnel; most of this protective apparel contains Kevlar®.
• 1982 The U.S. Military makes its first major purchase of the PASGT Vest , which provides extraordinary protection against fragments.
TIMELINE• 1985 The U.S. Military purchases the PASGT Helmet , at the time the
best armor available for protection against fragmentation, heat and flame.
• 1987 The U.S. Military places a major order for the CVC Vest because it offers superior ballistic protection from spall and fragmentation and does not melt or support combustion in air.
• 1988 The U.S. Military purchases a large number of CVC Helmets .• 1991 In the Gulf War, most U.S. combat soldiers wore a helmet made of
DuPont™ Kevlar®. The PASGT Vests worn by the military played a critical role in reducing the number of casualties during Desert Storm.
• 1993 Fragmentation- and bullet- resistant Ranger Vests help save the lives of military personnel stationed in Somalia.
• 1994 Countermine and Bomb Suits containing fabric made with DuPont™ Kevlar® help protect U.S. Army personnel serving in Somalia and Bosnia.
• 1995 DuPont™ Kevlar® Correctional™ introduced – first 100% soft woven fabric for stab protection in corrections institutions.
• 1997 The U.S. military makes its first major purchase of the Advanced CVC Helmet which in provides both bump and fragmentation protection. First commercial adoption of DuPont™ Kevlar® Correctional™ by New Jersey Correctional Institution.
TIMELINE• 1998 The U.S. military makes its first major purchase of
the Interceptor Vest . Even in extreme environmental conditions, this vest provides exceptional protection against a range of fragments and handgun bullets.
• 1999 The U.S. Navy purchases the Navy Flak Vest, designed to help protect personnel above deck against flame and fragmentation.
• 2000 The U.S. military makes its first major purchase of the MICH Helmet, which helps protect special operations personnel who must wear extensive communications equipment.
• 2002 Interceptor Body Armor , also known as the Outer Tactical Vest, is credited with holding down casualties in Afghanistan.
• 2004 Interceptor II Outer Tactical Vest developed for lighter weight protection in Iraq.
• 2005 New Advanced Combat Helmet made with Kevlar® begins procurement. DuPont™ Kevlar® Comfort XLT™ vest technology adopted by U.S. Customs and Border Patrol.
• 2006 Officer Cory Grogan inducted into the IACP/DuPont™ Kevlar Survivors' Club® as the 3000th save.
TIMELINE
•“History of Kevlar”, retrieved on January 13, 2011 at 9:18pm from: http://www2.dupont.com/Kevlar/en_US/products/history.html
SOURCES
• http://inventors.about.com/library/inventors/blkevlar.htm
• http://inventors.about.com/gi/dynamic/offsite.htm?site=http://www.invent.org/hall_of_fame/90.html