The present invention discloses a method for preparing ultra-high molecular weight polyethylene (UHMWPE) fibers, comprising the following steps: Step A: Dispersing UHMWPE powder and processing aids in a solvent to obtain a mixed raw material; Step B: Preheating the mixed raw material and feeding it into a twin-screw extruder for spinning to obtain a polyethylene sol-gel filament bundle; Step C: Cool the polyethylene sol-gel filament bundle in cold water, squeeze out excess water, and obtain a frozen gel filament; Step D: Pre-draw the frozen gel filament, extract it in an extractant at room temperature, then sequentially wash, evaporate, and dry it to obtain an ultra-high molecular weight polyethylene precursor filament; Step E: The UHMWPE fiber precursor is stretched to obtain UHMWPE fiber. This invention addresses the poor flowability issue during current UHMWPE processing, yielding polyethylene fiber with excellent creep resistance and ideal mechanical properties.
Country Code: CN
Application Number: CN202310599812.1
