The present invention relates to the technical field of polymer compound preparation, in particular to a preparation method of a biodegradable material for injection molding. The method obtains thermal images of material melting and melt flow sequences in the melting zone of a twin-screw extruder during the melting process of polylactic acid (PLA); obtains a melting coefficient according to the change of thermal values in the melt flow sequence; obtains a sequence category according to the melting coefficient, and obtains a melting effect according to the stable distribution degree within the sequence category and the distribution of the melting coefficient; adjusts the screw rotation speed of the twin-screw extruder according to the melting effect. The embodiment of the present invention accurately quantifies the melting effect by analyzing the melting state during the PLA melting process, thereby accurately controlling the screw rotation speed of the twin-screw extruder and ensuring the quality of the masterbatch product in the preparation process.
Country Code: CN
Application Number: CN202410451631.9
