Polyamide fiber commonly known as nylon, English name Polyamide(Abbreviated as PA), Density 1.15g/cm3, is a general term for thermoplastic resins containing a repeating amide group – [NHCO] in the main chain of the molecule, including aliphatic PA, fat-aromatic PA and aromatic PA. Among them, there are many aliphatic PA varieties, the yield is large, and the application is extensive. The name is determined by the specific carbon number of the synthetic monomer. Invented by the famous American chemist Carothers and his research team.
Nylon has excellent toughness, self-lubricity, wear resistance, chemical resistance, gas permeability, oil resistance, non-toxicity and easy coloring. Therefore, nylon is widely used in industry. High impact strength (higher than ABS` POM but lower than PC). Low heat distortion temperature, high hygroscopicity, and poor dimensional stability. Except for transparent nylon, nylon is mostly crystalline resin, and its crystallinity is high. The tensile strength, wear resistance, hardness and lubricity of the product are improved, and the thermal expansion coefficient and water absorption tend to decrease, but the transparency and Anti-impact performance is not good.
Therefore, in the production of nylon products, it is generally necessary to add high-purity magnesium oxide as a filler, which can better improve the wear resistance and chemical resistance of nylon. Therefore, the application of magnesium oxide in PA thermal plastics is increasingly extensive and the effect is remarkable, and it can achieve good economic effects.