The present invention relates to the field of polymer materials technology, disclosing ultra-high molecular weight polyethylene fibers, their preparation methods, and applications. The preparation method for said ultra-high molecular weight polyethylene fiber comprises: Step 1: Swelling ultra-high molecular weight polyethylene, flame retardant, and antioxidant in a solvent to obtain a swelling solution; Step 2: Compounding and melting the swelling solution in a twin-screw extruder, then extruding it to obtain a polymer melt; Step 3: Drawing the polymer melt through a spinning duct to form UHMWPE fibers; The feed port temperature of the twin-screw extruder is 25–40°C, and the temperature of the mixing and melting section is 80–180°C; The extrusion port temperature of the twin-screw extruder is 145–170°C. Within the spinning channel, the channel temperature is 75–140°C, with an airflow rate of 200–800 m³/h. The drawing frequency is 15–30. The ultra-high molecular weight polyethylene fiber provided by this invention exhibits strong flame retardancy, anti-aging properties, and mechanical performance.
Country Code: CN
Application Number: CN202111254228.X
