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What is nylon material?

The chemical name of nylon is polyamide, and the English name polyamide (PA) is also a term for polyurethane fiber, which is nylon, the first synthetic fiber in the world. It is a general term for thermoplastic resins containing repeating amide groups on the molecular backbone. Therefore, there are many types of nylon and not just a certain substance. These also include aliphatic PAs, aliphatic-aromatic PAs, and aromatic PAs. Among them, aliphatic PA has many varieties, large output, and wide application, so its naming depends on the specific number of carbon atoms in the synthetic monomer.