First, the application in polypropylene resin
Talc powder is often used to fill polypropylene, and talc has a sheet-like structural feature of a sheet configuration, so that a finer talc powder can be used as a reinforcing filler for polypropylene. In the modified system of polypropylene, the addition of ultrafine talcum powder can not only significantly improve the rigidity, surface hardness, heat creep resistance, electrical insulation, dimensional stability of polypropylene products, but also increase the impact of polypropylene. strength. Adding a small amount of talc powder to polypropylene can also act as a nucleating agent, improve the crystallinity of polypropylene, thereby improving the mechanical properties of polypropylene, and improving crystallinity and refining crystal grains. The transparency of polypropylene. Polypropylene composites filled with 20% and 40% ultrafine talc powder can significantly improve the rigidity of polypropylene and the creep resistance at high temperatures, both at room temperature and high temperature. In the automotive industry, polypropylene-added talc is mainly used in bumpers and instrument panels of automobiles, as well as in fan covers, heater covers, ducts, battery heat shields, fluid pump parts, etc.; in the aircraft industry, In the refrigerator door gasket, heater and vacuum pump cover, washing machine agitator; in the electrical industry, for injection molding various instrument housings and electrical components, in the home appliance industry, for refrigerator drawers, washing machine drums and other injection molded parts .
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