The invention provides a preparation method of inorganic powder modified polylactic acid fibers. Steps: Mix 30～50 parts of surface-treated inorganic powder, 0～5 parts of lubricant and 45～70 parts of polylactic acid chips, extrude and granulate in a twin-screw extruder to prepare masterbatch; the inorganic powder is pre-modified with amphiphilic surface treatment agent; blend 0.5～3 parts of masterbatch with 97～99.5 parts of polylactic acid chips, dry and melt-spin to form as-spun fibers; draw the fibers with a drawing machine, perform tension heat setting, then carry out crimping, relaxation drying, cutting and baling to obtain finished modified fibers. Inorganic powder acts as a crystal nucleating agent for polylactic acid modification, effectively improving fiber strength and structural stability.
Country Code: CN
Application Number: CN202411032074.3
