Advantages of nylon: 1. High mechanical strength, good toughness, high tensile and compressive strength. The specific tensile strength is higher than that of metal, and the specific compressive strength is comparable to that of metal, but its rigidity is less than that of metal. 2. The fatigue resistance is outstanding, and the parts can still maintain the original mechanical strength after repeated bending. 3. High softening point, heat resistance 4, smooth surface, small friction coefficient, wear resistance. It is self-lubricating and has low noise when it is used as a movable mechanical component. It can be used without lubricant when the friction effect is not too high; 5. It is resistant to corrosion, alkali and most salt liquids, weak acids, engine oils, aromatic hydrocarbons and general solvents, and is inert to aromatic compounds, but not resistant to strong acids and oxidants.