Nylon was invented at DuPont laboratories by Wallace Hume Carothers. He also invented neoprene. These inventions were made prior to WW 2 and helped greatly in the war effort. Neoprene being a synthetic rubber and nylon a replacement for silk. Japan was the leading producer of silk and for obvious reasons we could not buy it from them during the war. Nylon was invented on February, 28 1935 in Wilmington Delaware.