The solution was 'cloudy, opalescent upon being stirred, and of low viscosity' and usually was thrown away. The polymers she had been working with at the time, poly-p-phenylene-terephthalate and polybenzamide, formed liquid crystals while in solution, something unique to those polymers at the time. In 1964, her group began searching for a new lightweight strong fiber to use for light, but strong, tires. Poly-paraphenylene terephthalamide (K29) – branded Kevlar – was invented by the American chemist Stephanie Kwolek while working for DuPont, in anticipation of a gasoline shortage. Inventor of Kevlar, Stephanie Kwolek, an American chemist
