Nylon (polyamide), is synthesized by Gariel and Maass in the lab in 1889, and commerializd by Dupont in 1930s. Dupont name the fiber Nylon. Commercially available the most popular nylons include nylon PA 6, nylon PA 66, nylon PA 11 and nylon PA 12. The numerical nomenclature for nylon is derived from the number of carbon atoms in the diamine and dibasic acid monomers used to manufacture it. The ratio of carbon atoms is what gives each nylon type its unique property characteristics.