Polyamides

Polyamide commonly known as Nylon, the English name Polyamide (PA), it is a general term for polymers containing amide groups in the main chain repeat unit of macromolecules. Polyamides can be prepared by ring-opening polymerization of lactam, or by polycondensation of binary amines and dibasic acids. Polyamide plastic is developed on the basis of polyamide fiber, is the earliest thermoplastic that can withstand the load, and is also the largest, most versatile and most widely used variety of the five general engineering plastics. Its main varieties are nylon 6, nylon 66, nylon 11, nylon 12, nylon 610, nylon 612, nylon 46, nylon 1010 and so on. Among them, nylon 6, nylon 66 production is the highest, accounting for more than 90% of nylon production. Nylon 11, nylon 12 has outstanding low temperature toughness; Nylon 46 has excellent heat resistance and has been rapidly developed. Nylon 1010 is produced from castor oil and is a unique variety in China.