As most of our bags are made of nylon.so we'd like to describe it. Polyamide (Nylon), the English name of Polyamide (referred to as PA), density 1.15g / cm3, is the molecular main chain containing repeated amide groups - [NHCO] - thermoplastic resin, including aliphatic PA, fat - aromatic Family PA and aromatic PA. Aliphatic PA varieties which yield large, widely used, the name of the synthesis of the specific number of carbon atoms according to the monomer. By the famous American chemist Carothers and his research team invented. Nylon is a polyamide fiber (nylon) of a statement, can be made of long fiber or staple fiber. Nylon is the trade name for polyamide fibers, also known as Nylon. English name Polyamide (referred to as PA), the basic composition of material is through the amide bond - [NHCO] - connected aliphatic polyamide. As the nylon has many characteristics, therefore, in the automotive, electrical equipment, mechanical structure :, transport equipment, textile, papermaking machinery and other aspects are widely used. With the miniaturization of vehicles, electronic and electrical equipment, high-performance, lightweight machinery and equipment to speed up the process, the demand for nylon will be higher and higher. In particular, nylon as a structural material, its strength, heat resistance, cold resistance and so put forward a very high demand. PA6, PAl2 and other varieties have a strong price advantage, although some of the performance can not meet the requirements of the development of related industries. For an application area, through modification, improve some of its performance, to expand its application  areas. Mainly in the following aspects of modification. ① improve the water absorption of nylon to improve the dimensional stability of products. ② improve the flame retardant nylon to meet the electronics, electrical, communications and other industries requirements. ③ to improve the mechanical strength of nylon in order to achieve the strength of metal materials, replace the metal ④ improve the low-temperature performance of nylon, and enhance its ability to withstand environmental strain. ⑤ improve the wear resistance of nylon to meet the requirements of high wear-resistant occasions. ⑥ improve the antistatic properties of nylon to meet the requirements of mining and mechanical applications. ⑦ improve the heat resistance of nylon to adapt to high temperature conditions such as automotive engines in the field. ⑧ reduce the cost of nylon, improve product competitiveness.