Nylon was developed by the American scientist Carothers and a research team led by it. It is the first synthetic fiber in the world. The appearance of nylon has made the textile look new, and its synthesis is synthetic. A major breakthrough in the fiber industry is also an important milestone in polymer chemistry.
Nylon, the English name polyamide (PA), is a generic term for thermoplastic resins containing the repeating amide gene -[NHCO]- in the main chain of the molecule. It includes aliphatic PA, fat-aromatic PA, good aromatic PA. Among them, fat The family PA has many varieties, large yield and wide application, and its name is determined by the specific carbon number of the synthetic monomer.
Nylon has many characteristics, so it is widely used in automobiles, electrical equipment, mechanical parts, transportation equipment, textiles, papermaking machinery and so on. With the miniaturization of automobiles, the high performance of electronic and electrical equipment, and the acceleration of the weight reduction of mechanical equipment, the demand for nylon will be even higher. In particular, nylon, as a structural material, places high demands on its strength, heat resistance and cold resistance.
The inherent shortcomings of nylon are also important factors limiting its application. Especially for PA6 and PA66, it has a strong price advantage compared with PA46 and PAl2, although some properties can not meet the development requirements of related industries. Therefore, it is necessary to expand the application field by modifying and improving certain properties for a certain application field. Due to the strong polarity of PA, it has strong hygroscopicity and poor dimensional stability, but it can be improved by modification.
Nylon tube is a variety of pipe extruded from different grades of nylon material and hard thick-walled nylon tube cast from caprolactam material. This entry focuses on the most commonly used nylon hoses.