The present invention discloses a polypropylene throat swab material and its preparation method, comprising the following components by weight: polypropylene 70-85 parts, inorganic filler 10-20 parts, antioxidant 0.3-0.5 parts, lubricant 0.5-1.0 parts, titanium dioxide 2-4 parts, molecular weight regulator 0.2-0.5 parts. wherein the molecular weight regulator comprises at least one of DTBP or peroxide 101. The preparation method comprises: weighing the components in proportion and mixing uniformly; extruding and pelletizing using a twin-screw extruder; wherein the main shaft speed of the twin-screw extruder is 300–500 rpm, and the zone temperatures are set as follows: Zone 1: 160–190°C, Zone 2: 160–200°C, Zone 3: 180–240°C, Zone 4: 200–250°C, Zone 5: 200–250°C, Zone 6: 200–250°C, Zone 7: 180–240°C, Zone 8: 180–230°C, Zone 9: 180–230°C. This polypropylene throat swab material exhibits high brittleness, high flowability, and high resilience.
Country Code: CN
Application Number: CN202111550903.3
