PA is aliphatic polyamide, there are two broad categories: nylon 6 and nylon 66. Nylon 6 polymer formed by the condensation of caprolactam, nylon 66 and a adipic acid from hexamethylenediamine polymerization. Nylon products are wear-resistant, high-intensity characteristics, in particular by enhancing the modification of nylon products with temperature, creep resistance and good dimensional stability.

Widely used in clothing, textiles, silk-like, curtain line, silk carpets, such as the textile industry, can also be used as engineering plastics widely used in the automobile industry, electronics, machinery parts, and so on.