Polyamide is a general term for high polymers containing amide groups in their repeating molecular chains. PA6 pure resin is available in white, milky white, or slightly yellow granules that are transparent or semi-transparent, with a molecular weight ranging from 16,000 to 33,000 and a physical density between 1.13 and 1.15. It is prone to moisture absorption in the atmosphere, with a moisture regain of 1.5%. PA6 boasts excellent fatigue resistance, maintaining its original mechanical strength after multiple bending and folding, good toughness, and high tensile and compressive strength. It has a smooth surface, low friction coefficient, is inert to biological侵蚀, and exhibits good antibacterial and antienzyme properties. The parts are lightweight, easy to dye, and easy to shape.PA6/PA66 nylon is widely used as a substitute for steel, iron, copper, and other metals, being an important engineering plastic. Molded nylon is extensively used to replace wear-resistant parts in machinery and equipment, as well as for wear-resistant components made from copper and alloys. It is suitable for manufacturing wear-resistant parts, transmission structural components, home appliance parts, automotive manufacturing parts, screw prevention mechanical parts, chemical machinery parts, and chemical equipment components. This includes turbines, gears, bearings, impellers, cranks, instrument panels, drive shafts, valves, blades, screws, nuts, seals, shuttles, sleeves, shaft connectors, and more.