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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.
Square-bottom paper bag In 1868, Margaret Knight invented a machine that folded and glued flat-bottomed brown paper bags familiar to shoppers today. She obtained 87 US patents that include lid-removing pliers, a numbering machine, a window frame and sash, and variants on rotary engines.
The dishwasher, chocolate-chip cookies, and the first version of the Monopoly board game were all created by women. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: ...
In honor of Women’s History Month, we’re giving credit where credit is due, and highlighting 10 products made by women. 10 products you didn't know were invented by women [Video] Skip to main ...
Expanded polystyrene, used for building insulation, packaging, and cup, was invented by Dow Chemical. [1] 1957: Italian firm Montecatini begin large-scale commercial production of isotactic polypropylene. 1960s: High-density polyethylene bottles introduced and soon replace glass bottles in most applications [11] 1965
A British scientist claims to have invented a plastic-free, single-use water bottle that can decompose within three weeks. A scientist says he's invented a replacement for plastic water bottles ...
Margaret E. Knight was born in York, Maine on February 14, 1838, to Hannah Teal and James Knight. [4] As a little girl, “Mattie,” as her parents and friends nicknamed her, preferred to play with woodworking tools instead of dolls, stating that “the only things [she] wanted were a jack knife, a gimlet, and pieces of wood.” [5] She was known as a child for her kites and sleds.