The present invention discloses a glass-fiber-reinforced high-flame-retardant polypropylene, which is composed of polypropylene resin A, polypropylene resin B, toughening agent POE, glass fiber, processing aid and compound halogen-free flame retardant. The present invention also discloses a preparation method of the glass-fiber-reinforced high-flame-retardant polypropylene: adding polypropylene resin A, polypropylene resin B, toughening agent POE and processing aid into a high-speed mixer in proportion, then extruding in a twin-screw extruder; adding the flame retardant into a No. 1 side-feeding loss-in-weight scale; adding glass fiber into a No. 2 side feeder. The product prepared by the present invention mainly has a smooth surface without floating fibers, can be used for electrical surface parts and internal structural parts, and achieves flame retardancy grade 5VA, so it can be directly used for electrical contact parts, greatly saving surface sheet metal covering of electrical structural parts, and reducing the cost of electrical control parts by more than 50%. Side feeding of the halogen-free flame retardant can improve flame retardant efficiency, prevent decomposition of the flame retardant in the twin-screw extruder for a long time, and avoid particle foaming.
Country Code: CN
Application Number: CN202410205865.5
