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Stephanie Louise Kwolek (/ ˈ k w oʊ l ɛ k /; July 31, 1923 – June 18, 2014) was a Polish-American chemist best known for inventing Kevlar (poly-paraphenylene terephthalamide). ). Her career at the DuPont company spanned more than 40 ye
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, [ 3 ] [ 2 ] [ 4 ] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
Pulse-code modulation [205] 2004 Bradford Parkinson: 1935 Global positioning system (GPS) [206] 2004 Charles Best: 1899 Isolation of insulin [207] 2004 Charles Kelman: 1930 Cataract surgery [208] 2004 Edith M. Flanigen: 1929 Molecular sieves [209] 2004 Elias Howe: 1819 Sewing machine [210] 2004 Frederick Banting: 1891 Isolated and purified ...
In 1975 Richard A. Armellino, the founder of American Body Armor, marketed an all Kevlar vest called the K-15, consisting of 15 layers of Kevlar that also included a 5" × 8" ballistic steel "Shok Plate" positioned vertically over the heart and was issued US Patent #3,971,072 for this innovation. [27]
There is a trade-off between steel and kevlar beads: steel is cheaper and easier to mount, but kevlar is lighter and allows the tire to be folded up, useful for spare tires. One source: [ 1 ] -- 97.120.76.86 ( talk ) 01:27, 26 October 2014 (UTC)
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DuPont first invented Kevlar in 1965 and its Maydown manufacturing facility is one of only three places in the world where Kevlar is produced. The DuPont site at Maydown is now the lead partner in the University of Ulster 's Biodiversity Action on Industrial Site (BAIS) project that aims to enhance biodiversity on land close to industrial activity.
Kevlar KM2 is a synthetic para-aramid fiber produced by DuPont. The fiber is an evolution of the original Kevlar fiber. The following quotes summarize Kevlar KM2's properties. "DuPont created Kevlar KM2 to achieve the performance goals defined by casualty reduction testing for the United States Department of Defense.