Nylon, a synthetic polymer, was first produced by Wallace Carothers in 1935. It is one of the most commonly used polymers. The thermoplastic, silky material was first used in a nylon-bristled toothbrush, then women’s stockings.
Nylon was made of repeating units linked by amide bonds and is frequently referred to as ppolyamide (PA). There are two common methods of making nylon for fiber applications. It was the first commercially successful synthetic polymer.
It was originally intended to be a replacement for silk and was substituted in parachutes, flak vests, and vehicle tires. Nylon fibres used many applications, including fabrics, bridal veils, carpets, musical strings, and rope. Many mechanical parts like machine screws and gears use solid nylon. It is also used in hair combs.
After DuPont patented nylon 6,6 other companies developed the homopolymer nylon 6. The properties of nylon 6 are sometimes indistinguishable from those of nylon 6,6 except for the melt temperature and some fiber properties in textile and carpet products.
Nylon 5,10 has superior properties to Nylon 6, however, it is more expensive. Nylon fibers can be strengthened by cold drawing after an industrial spinneret is extruded through the pores in the fibers. Nylon is less absorbent than wool or cotton.