Technology Elements Time Line By Alonso Rogado 1846 Nitrocellulose 1860 Cellulose 1907 Bakelite 1908 Rayon 1920 Cellophane 1926 Polyvinyl chloride (PVC) 1931 Neoprene 1935 Nylon and neoprene 1936 Polyethylene 1938 Teflon 1949 Tupperware 1966 Kevlar 1979 Polyester amides
