Preparation method of antibacterial polypropylene interior material for automobile

The invention relates to a polypropylene modified material, in particular to a preparation method of an antibacterial polypropylene interior material for an automobile. The invention provides a preparation method of an antibacterial polypropylene interior material for an automobile, which comprises the following steps: mixing 45-95 parts by mass of polypropylene, 0-15 parts by mass of flexibilizer, 1-25 parts by mass of zinc oxide whisker and 0.2-0.4 part by mass of antioxidant in a high-speed mixer for 4-6 minutes at 80-90 DEG C, and extruding and granulating by a double-screw extruder under the process condition of 180-200 DEG C, the antibacterial polypropylene interior material for the automobile is prepared. By adding the zinc oxide whiskers, the defect that in the prior art, the mechanical property of a polypropylene composite material is degraded while the antibacterial property of the polypropylene composite material is improved is overcome, and the antibacterial interior trim part material for the aut