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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.
Kevlar was initially used as a replacement for steel-belting in tires, and later for use in ropes, gaskets, and automotive and aviation parts. [1] [3] In 1971, Shubin, who was then the Director of Science and Technology for the National Institute for Law Enforcement and Criminal Justice, [4] suggested using Kevlar to replace nylon in bullet ...
In the 1980s, Dr. Jacob Lahijani, Senior Chemist at DuPont, invented Kevlar 149 and was highlighted in the "Innovation: Agent of Change. [77] Kevlar 149 is used in armor, belts, hoses, composite structures, cable sheathing, gaskets, brake pads, clutch linings, friction pads, slot insulation, phase barrier insulation, and interturn insulation. [78]
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)
1921 – Whitney Young, American activist (d. 1971) 1922 – Hank Bauer, American baseball player and manager (d. 2007) 1923 – Ahmet Ertegun, Turkish-American songwriter and producer, founded Atlantic Records (d. 2006) 1923 – Stephanie Kwolek, American chemist and engineer, invented Kevlar (d. 2014)
1971: The first space station, Salyut 1, is launched. 1971: IBM developed and released the world's first floppy disk and disk drive. [504] 1972: The first video game console, used primarily for playing video games on a TV, is the Magnavox Odyssey. [505] 1973: The first fiber optic communication systems were developed by Optelecom. [506]
Second Chance is an American body armor manufacturing company. The company was founded in the early 1970s by U.S. Marine and pizza delivery owner/driver Richard Davis. Davis developed the idea of a bulletproof vest after shooting three armed robbers in self-defense during a delivery.