The present invention relates to the technical field of preparation of polypropylene nonwoven fabric materials, and provides a preparation method of polypropylene melt-blown nonwoven fabric, which solves the problems of long production process, low efficiency, high cost, and inability to efficiently remove residual degrading agent and volatiles in the existing polypropylene nonwoven fabric preparation process. The method comprises the following steps: 1) feeding polypropylene raw material and degrading agent into a twin-screw extruder from the main feed port and auxiliary feed port respectively for melt reaction extrusion; 2) feeding the high melt flow rate polypropylene melt extruded by the twin-screw extruder into a devolatilization device to efficiently remove residual degrading agent and volatiles in the melt in a molten state; 3) conveying the melt to a melt-blowing die head through a melt metering pump, preparing fibers under the drafting action of hot air, receiving the fibers through a receiving and web-forming system, and performing web-laying to obtain the melt-blown nonwoven fabric.
Country Code: CN
Application Number: CN202410326504.6
