Application of nylon plastic

Types of Nylon A class of thermoplastic resins containing amide groups (-conh-) in the repeating structural units of nylon molecular backbone, including aliphatic polyamides, aliphatic-aromatic polyamides and aromatic polyamides. Aliphatic polyamides have many varieties, large output and wide applications, and can be used as both fibers and plastics. Aliphatic-aromatic polyamides have few varieties and small output; Aromatic polyamide is often referred to as polyaramid for short, and is mainly used as fiber (aramid fiber). Aliphatic nylon is divided into nylon 6, nylon 66, nylon 10 10, etc. In fact, there is not much difference between nylon 6 and nylon 66. They are all produced because DuPont applied for a patent after inventing nylon 6 and 6, so other companies also invented nylon 6 in order to produce nylon. Nylon is the most common artificial fiber. 1940 nylon stockings were very popular as soon as they came out, and nylon became famous in one fell swoop. Later, during World War II, nylon was widely used to weave parachutes and ropes. However, the original use of nylon was to make bristles for toothbrushes. Nylon belongs to polyamide and has amino groups in its main chain. Amino groups are polar because hydrogen bonds attract each other. So nylon is easy to crystallize and can be made into high strength fibers. Polyamide is a tough horny translucent or milky crystalline resin, which is often made into cylindrical particles. The molecular weight of polyamide for plastics is generally1.5,000 ~ 20,000. The common characteristics of all kinds of polyamides are flame retardancy, high tensile strength (up to 104MPa), wear resistance, good electrical insulation, heat resistance (thermal deformation temperature at 455kPa is above 150℃), melting point 150 ~ 250℃, high fluidity of molten resin and relative density of 65433.