Nylon is a component of nylon fabric, which is scientifically called polyamide fiber. Nylon, with a density of 1.15g/cm3, is the general name of thermoplastic resins containing repeated amide group - [nhco] - in the molecular main chain, including aliphatic PA, aliphatic aromatic PA and aromatic PA.
Polyamide is mainly used in synthetic fibers. Its most prominent advantage is that its wear resistance is higher than all other fibers, 10 times higher than that of cotton and 20 times higher than that of wool. Slightly adding some polyamide fibers to the blended fabric can greatly improve its wear resistance; When stretched to 3-6%, the elastic recovery rate can reach 100%; It can withstand tens of thousands of bending without breaking.
The strength of polyamide fiber is 1-2 times higher than that of cotton, 4-5 times higher than that of wool and 3 times higher than that of viscose fiber. However, the heat resistance and light resistance of polyamide fiber are poor, and the retention is also poor. The clothes made of polyamide fiber are not as neat as polyester.
In addition, nylon-66 and nylon-6 used for clothing have the disadvantages of poor moisture absorption and dyeing. Therefore, a new variety of polyamide fibers, new polyamide fibers of nylon-3 and nylon-4, have been developed. They have the characteristics of light weight, excellent wrinkle resistance, good air permeability, good durability, dyeing and heat setting, so they are considered to be very promising.