Choosing nylon rods requires comprehensive consideration of material type, physical properties, processing technology, and application environment. Nylon 6 is suitable for general mechanical components, nylon 66 is suitable for high-temperature and high-strength scenarios, and nylon 1010 and 12 have strong chemical corrosion resistance. Specific requirements should be matched based on performance indicators such as tensile strength, wear resistance, and hot deformation temperature. In terms of processing methods, the casting type is suitable for large-sized parts, while the extrusion type is suitable for small-sized batch production. Environmental factors such as humidity, pH, temperature, etc. can also affect the selection.