Kevlar invention date Kwolek’s research at the DuPont Textile Lab included experimenting with long molecules called polymers in order to develop lightweight, heat-resistant fibers. The company had asked Stephanie and others in her department at the lab to work on making a specific kind of molecule: a long chain molecule. Stephanie Louise Kwolek was an American chemist who invented poly-paraphenylene terephthalamide—better known as Kevlar. Kwolek, a DuPont chemist who invented the technology behind Kevlar, a virtually bulletproof fiber that has saved thousands of lives, died on Wednesday in Wilmington, Del. Today there are more than 200 applications for Kevlar, ranging from airplane parts and reinforced suspension bridge structures to flame-resistant mattresses, boots, and, famously, body armor. Prior art date 1963-04-25 Legal status (The legal status is an assumption and is not a legal conclusion. De nombreux policiers doivent leur vie à Stephanie Kwolek, car le Kevlar est le matériau utilisé dans les gilets pare-balles. Eventually, Kwolek discovered that her development of poly-p-Phenylene-terephthalate and polybenzamide formed an amazing fiber. En savoir plus sur le Kevlar . Kevlar is a strong and light para-aramid synthetic fiber and in comparison to the same weight of steel it is five times stronger. Kwolek was born in 1923 in New Kensington, Pennsylvania. The result was Kevlar—a material best known for its use in bulletproof vests—and a new branch of polymer chemistry. Stephanie Kwolek invented para-aramid fibers - used in mooring ropes, fiber-optic cables, aircraft parts, canoes and bullet-resistant vests. Apr 14, 2014 · One of the few women chemists at DuPont in the 1960s, Stephanie Kwolek’s work led to the development of Kevlar, a fiber best known for its use in bullet-resistant vests. Nov 9, 2018 · In 1965, Stephanie Kwolek created what we now know as Kevlar, a durable plastic that has over 200 applicable uses, including protective vests, ropes, cables, and vehicles. (2014), “Obituary: Kevlar Inventor Stephanie Kwolek”, Keep up-to-date with ALD projects and news with our monthly newsletter. The best-known member is Kevlar, a material used in protective vests as well as in boats, airplanes, ropes, cables, and much more—in total about 200 applications. En 1964, Stephanie Kwolek est chargée par la société Du Pont de Nemours de développer un matériau qui pourrait remplacer le cordon en acier noyé dans le caoutchouc des pneus de voiture. 1923 – 2014 Invented Kevlar Fiber Major Field of Study: Chemistry Specific Accomplishment: Invented Kevlar Fiber Home Town: New Kensington, Pennsylvania Youth Activities: Became interested in science through studying nature with her father, John Kwolek, a naturalist. Son objectif : découvrir une nouvelle fibre synthétique qui viendrait renforcer les pneus des voitures tout en les allégeant. Her career at the DuPont company spanned more than 40 ye Kevlar. Devant ses yeux se forme une étrange solution blanchâtre, tout à fait inhabituelle. The material of choice for bullet-resistant vests and many other applications generates hundreds of millions of dollars in sales worldwide each year. While working for DuPont, Kwolek invented Kevlar. It is five times stronger than steel. In 1964, Stephanie Kwolek invents the high-strength, low-weight plastic Kevlar, which improved the performance of tires, boat shells, body armor, components for the aerospace industry, and more. Kevlar® is resistant to wear, corrosion and flames, and it is the main ingredient in the production of bulletproof vests, which have become invaluable to legions of soldiers and law enforcement officers. Her invention of this super synthetic fiber is a very important discovery for the plastics industry. Stephanie was working on polymers like poly-p-phenylene terephthalate and polybenzamide, and the result was a liquid crystal that was radically different from all known polymers at that time. L’inventrice du Kevlar, Stephanie Kwolek, une chimiste américaine d’origine polonaise. Her invention has literally been a lifesaver. Jul 16, 2014 · L’invention du Kevlar En 1964, le groupe DuPont travaille sur la mise au point d’une fibre légère et solide pour créer des pneus plus légers et consommer moins de carburant. Subscribe for more retro science stories! #RetroVibes #H Jun 20, 2014 · Ms. Kevlar is used today in a wide variety of industrial uses. ” She started working as a chemist in 1946 just to earn enough money to go to medical school, to fulfill her childhood dream of becoming a doctor. Le Kevlar, breveté par Kwolek en 1966, ne rouille pas et ne se corrode pas et est extrêmement léger. In 1964, her team began searching for a lightweight yet strong material suitable for tires. Jan 1, 2024 · The person behind the invention of Kevlar is Stephanie Kwolek, an expert in chemical compounds and an employee for the DuPont Company. She was inducted into the National Inventors Hall of Fame in 1995 and received the National Medal of Technology in 1996. Kwolek has earned 17 patents and the highest honors in her field. ) Expired - Lifetime Application number US275506A Inventor Kwolek Stephanie Louise Morgan Paul Winthrop In the year 1965, Kevlar was invented by a woman Stephaine Louise Kwolek at DuPont Company in the United States. Jul 31, 2019 · That group eventually refined Kwolek's work into Kevlar, an invention credited with saving thousands of lives and making DuPont billions of dollars. The name Kevlar was then named and patented by the Dupont Chemical Company. The polymers she had been working with at the time, poly-p-phenylene terephthalate and polybenzamide,formed liquid crystal while in solution that at the time had to be May 1, 2025 · Hats off to you madam, you saved thousands of lives :eusa_clap:. May 27, 2021 · Bregar, B. Apr 17, 2025 · Stephanie Kwolek was the unlikely DuPont chemist who invented Kevlar, the miracle fiber that's five times stronger than steel. They hired a team of inventors led by Stephanie Kwolek to use polymers to develop the new material. Though her invention is used in everything from bullet-proof vests to tennis rackets, sneakers, and even snare drums, Kwolek signed away the patent royalties to the company. A few years later, her invention—Kevlar®—is used to make bullet-resistant vests and helmets, saving thousands of lives. Kwolek gave all rights to the Company. Stephanie Kwolek was a chemist at the DuPont company in Wilmington, Delaware, when she Its exceptional strength and stiffness led to the invention of Kevlar, a synthetic fibre, woven into a fabric and layered, that, by weight, has five times the tensile strength of steel. Cependant, Kwolek ne sera pas très impliquée dans le développement des applications ultérieures du Kevlar [9]. It is used in helmets, tennis rackets, trampolines, bullet proof vests and other objects of common use. May 19, 2025 · The invention of Kevlar – a stroke of luck Stephanie Kwolek Stephanie Sophie Kwolek was born as the child of Polish immigrants in New Kensington, Pennsylvania, on 31 July, 1923. Learn how this incredible material, five times stronger than steel, o En 1971, le Kevlar moderne est introduit sur le marché [4]. L'invention du Kevlar restera l'une des grandes réussites de l'entreprise, qui lui permettront d'engendrer d'importants bénéfices. (AP) — Stephanie Kwolek, a pioneering female chemist at DuPont who invented the exceedingly tough fibers widely used in Kevlar body armor, has died, colleagues said Friday. Stephanie ne le sait pas encore mais elle vient d Découvrez en 6 points l’invention du kevlar, ses applications, ses propriétés uniques, et l'héritage durable de S Kwolek dans le monde des matériaux. For our “Hidden His Apr 2, 2024 · Stephanie Kwolek is the chemist who invented Kevlar in 1965. Main achievements: Inventor of the Kevlar. “To invent, I draw upon my knowledge, intuition, creativity, experience, common sense, perseverance, flexibility, and hard work. Kevlar inventor Stephanie Kwolek, 90, dies The DuPont scientist's body armor invention is credited with saving thousands of lives. Jun 20, 2014 · Stephanie Kwolek prepares a polymerization experiment at DuPont's Pioneering Research Lab in 1967. Most notable is Kevlar, which is used in bulletproof vests, helmets, and more. ), as part of her research into synthetic fibers for chemical company DuPont (U. Mar 7, 2025 · She received many awards for her invention of the technology behind Kevlar fiber, including induction into the National Inventors Hall of Fame in 1995. Stephanie Kwolek wanted to be a doctor. In 1964, in anticipation of a gasoline shortage, her group began searching for a lightweight yet strong fiber to be used in tires. Serendipity played a crucial role in Kevlar's journey from its intended use in car tires to its revolutionary application in body armor. chemist who in 1965 invented Kevlar, the lightweight, stronger-than-steel fiber used in bulletproof vests and other body armor around the world. ). Jun 18, 2014 · Lived 1923 - 2014. Kwolek, whose invention has saved thousands of lives, was the daughter of two Polish immigrants. —died June 18, 2014, Wilmington, Delaware) was an American chemist, a pioneer in polymer research whose work yielded Kevlar, an ultrastrong and ultrathick material best known for its use in bulletproof vests. In 1996 she received the National Medal of Technology, and in 1997 the Perkin Medal, presented by the Society of Chemical Industry. Key Innovation: Inventor: Stephanie Kwolek, 1965. In 1965, the company DuPont realized that there was a need for a new type of tyre that was lightweight and durable, as a gasoline shortage was anticipated. . It was kind of an assignment. The fascinating story behind Kevlar, invented by chemist Stephanie Kwolek in the 1960s. However, the unexpected properties of this new fiber, particularly its high Jul 3, 2022 · After the Invention. Bachelor’s Degree: Carnegie Institute of Technology, Bachelor of Science, Chemistry, 1946 Engineering and Science Feb 5, 2020 · More About Kevlar . S. Stephanie Kwolek, a chemist at DuPont, initially developed Kevlar in the 1960s as a lightweight and durable material for tires. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. View the transcript of the story. Kevlar is used in space suits, tires, aircraft, boats, golf clubs, lightweight bicycles, and bulletproof vests. Invented in 1963 by scientist Stephanie Kwolek (U. She was 90. Stephanie Kwolek was an organic chemist, best known for inventing Kevlar in 1965. It took almost ten years from its invention to the date on which a bullet-proof product was created. Of course, they were impressed also by her important invention in the 1960s. Le projet est proposé à Stephanie Kwolek, qui découvre alors le poly-paraphénylène téréphtalamide, une fibre synthétique cinq fois plus solide que l’acier. Kevlar: Invented in the late 1960s by Stephanie Kwolek (often referred to as S. It was her childhood dream. Kwolek (1923–2014) was born in New Kensington, Pennsylvania. The most famous application of Kevlar is used to create bullet-resistant vests, coats, and shirts as well as cut-resistant gloves. edu » 617-253-3352 Feb 7, 2025 · Stephanie Louise Kwolek, born on July 31, 1923, in the industrious town of Pittsburgh, Pennsylvania, emerged as a celebrated Polish-American chemist whose groundbreaking invention of Kevlar has Its exceptional strength and stiffness led to the invention of Kevlar®, a synthetic material that is five times as strong as steel. Mar 20, 2024 · For our “Hidden Histories” series this Women’s History Month, we learn about Stephanie Kwolek, the pioneering researcher who invented Kevlar in 1965. [26] In the mid-1970s, DuPont, the company which employed Kwolek, introduced Kevlar. • DuPont Kevlar ® Kevlar is one of the most important manmade organic fibers ever developed. You can also opt into Jun 20, 2014 · Kwolek, who died Wednesday at 90, was a DuPont Co. Credit: Public Domain. Jun 21, 2014 · The inventor of Kevlar, the lightweight fibre used in bulletproof vests and body armour, has died aged 90. Advantages of Kevlar: Strength: Five times stronger than steel. Specifically, Kevlar is 5 times stronger than steel. Kevlar, patented by Kwolek in 1966, does not rust or corrode and is extremely lightweight. ), it is an extremely strong Jun 18, 2014 · 101 Rogers Street, Suite 3C, Cambridge, MA 02142 info-lemelson@mit. Stephanie Kwolek was a chemist at the DuPont company in Wilmington, Delaware, when she En ce jour de l’année 1964, Stephanie Kwolek, chimiste chez DuPont de Nemours, tente un nouveau mélange de polymères. 20th Century: Kevlar Revolution. The 20th century marked a significant leap forward in bulletproof technology, thanks to the invention of Kevlar. Mar 29, 1996 · A chemist testing new synthetic polymers at DuPont in the 1960s, Stephanie Kwolek discovered a substance that weighs very little but is strong and stiff beyond anyone's imagination. Shortly thereafter the Army began their research and development by the Army Natick Development Center out of Watertown Arsenal in Massachusetts. Stephanie has received several awards for her invention of Kevlar fiber, including the National Medal of Technology in 1996 and the Perkin Medal from the American Chemical Society in 1997. Material: Kevlar, a high-strength synthetic fiber. Mais malgré cela, Stephanie Kwolek n'en retira aucun avantage Jun 20, 2014 · News of Kwolek's death came a day after DuPont Protection Technologies announced that a million bullet-resistant vests have been sold using DuPont Kevlar XP since that version of the product was Jun 20, 2014 · Stephanie L. Kevlar is an immensely strong plastic, first used as a replacement for steel reinforcing strips in racing car tires, and now used in a large number of applications where high strength is required without high weight. Kwolek, who died Wednesday, made the breakthrough discovery that led to the invention of Kevlar. Jun 24, 2014 · They were impressed by the fact that she was a female inventor who started working at DuPont in 1946 when few women were hired as scientists. Scientist Stephanie Kwolek stumbled on to an answer that has changed the world when she invented Kevlar. Mar 17, 2024 · These products and many others are made with Kevlar, a strong lightweight fiber invented by researcher Stephanie Kwolek in 1965. WILMINGTON, Del. O Cl O C l H2N NH2 Kevlar is a fiber that’s stronger than steel, and it’s revolutionized everything from military and police body armor to sports equipment. She loved science and sewing (interesting combo, no?), experimenting with different fabrics from an early age with her mother's help. Kwolek, or even not at all), a researcher at Dupont: Kevlar is a polymer made by this reaction between acid chlorides and amines to form amide linked polymers. The polymer fiber that Kwolek created―Kevlar®―is very light weight, stiff, and, pound for pound, five times stronger than Jun 18, 2014 · The most famous product of her discovery was Kevlar®, a polymer fiber five times stronger than the same weight of steel. Elle n'a pas non plus profité des produits vendus par DuPont avec son invention, puisqu'elle a signé le brevet Kevlar pour l'entreprise [10]. Jul 31, 2018 · Stephanie Kwolek, the chemist who invented Kevlar, was born on this day in 1923. She decided Stephanie invented Kevlar while working at DuPont. Inventor of Kevlar, Stephanie Kwolek, a Polish-American chemist Poly-paraphenylene terephthalamide (K29) – branded Kevlar – was invented by the Polish-American chemist Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage. Many police officers owe their lives to Stephanie Kwolek, for Kevlar is the material used in bulletproof vests. Her career at the DuPont company spanned more than 40 years. It is similar to the synthesis of nylon, which is another polymer with an amide link. -- Stephanie Kwolek, the DuPont scientist whose invention Stephanie Kwolek invented Kevlar in nineteen sixty-five! 🛡️ Her fiber saved lives in vintage style. Apr 18, 2018 · But the invention of Kevlar wasn’t like that at all. It was patented in 1966, and is a product that is both lightweight and does not rust or corrode. Kevlar inventor, pioneer woman chemist Kwolek dies at 90 (Update) June 20 2014 Stephanie Kwolek, a US chemist who invented the Kevlar fiber used in Created Date: 6/3/2025 5:22:00 AM In 1971 the company released another material that Kwolek helped develop, called Kevlar. In 2006 DuPont recognized Cory Grogan of Atlanta as the 3,000th police officer saved by a Kevlar vest. Stephanie Kwolek (born July 31, 1923, New Kensington, Pennsylvania, U. Kwolek, who died Wednesday at 90, was a DuPont Co. She was born in the Pittsburgh suburb of New Kensington, Pennsylvania. In 1965 Stephanie Kwolek created the first of a family of synthetic fibers of exceptional strength and stiffness. It all began when DuPont Chemicals asked researchers to make Stephanie Swolek invented industrial fibers that protect and save thousands of lives. 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). Jun 10, 2022 · Now commonly used as body armor, Kevlar fabric was invented in an attempt to make lightweight tires to increase car gas mileage.
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