Polyamide, commonly known as Nylon or PA, is a thermoplastic resin with repeated amide groups - [NHCO] - on its main chain. This material has shown wide application prospects in multiple fields due to its unique chemical structure and physical properties.
Polyamides can be obtained by ring opening polymerization of lactams or by condensation of diamines and diacids. Its main varieties include nylon 6, nylon 66, nylon 11, nylon 12, nylon 610, nylon 612, nylon 46, nylon 1010, etc. Among them, nylon 6 and nylon 66 have the highest production, accounting for more than 90% of the total nylon production. These different varieties of polyamides have their own unique properties due to their different chemical structures.
In terms of physical properties, polyamide has high crystallinity, melting point, and surface hardness, while exhibiting good wear resistance and self-lubricating properties. Hydrogen bonds can form between its molecules, making the structure prone to crystallization, thereby endowing the material with high melting point and excellent mechanical properties. In addition, polyamide also has certain flexibility and rigidity, as well as good low temperature resistance and certain heat resistance, and can be used below 100 ℃.
The widespread application of polyamide benefits from its excellent properties in various aspects. In the consumer goods industry, polyamide is used to manufacture plastics, textiles, shoes, and daily necessities. Especially in the field of textiles, polyamide fibers are widely used in the manufacturing of clothing, socks, bedding, and ropes due to their softness, breathability, and moisture wicking properties. In the field of engineering plastics, polyamide has become an ideal choice for manufacturing various mechanical parts, automotive components, electronic product casings, and piping systems due to its high strength, heat resistance, and chemical corrosion resistance. In addition, polyamide is also used in the production of insulation materials, anti-corrosion agents, lubricants and other chemical products, as well as insulation materials, wire and cable sleeves, and electronic component brackets in electronic products.
