The present invention relates to the technical field of lactic acid fibers, in particular to a dope-dyed polylactic acid fiber and a preparation method thereof. The present invention takes polylactic acid as a base material, micron-sized toner, a high-efficiency dispersant and the like to prepare a special color masterbatch for polylactic acid fibers, and then adopts components such as color masterbatch, polylactic acid and a modifier to extrude and granulate through a mixer and a twin-screw extruder, and spin by a spinning machine to obtain a dope-dyed polylactic acid fiber without color patterns/mixed colors and reduced barrel bursting. The color masterbatch is melted and dispersed uniformly during the spinning and crystallization of polylactic acid, so that the rigidity of the polylactic acid fiber can be improved.
Country Code: CN
Application Number: CN202410716088.0
