Talc is a natural magnesium silicate, its unique micro-scale structure, with a certain degree of water resistance and a high degree of chemical inertness,Therefore, it has good chemical resistance and sliding properties. It filled with polyethylene can be used as engineering plastics, has good chemical resistance and fluidity, can compete with ABS, nylon, polycarbonate. Filling polyethylene with it can improve the following properties: improve toughness, flexural modulus and torsion modulus, improve flexural strength, reduce creep tendency at room temperature and high temperature, improve thermal temperature and dimensional stability, improve deformation and warpage; At the same time, it also has a lower thermal expansion coefficient, improve thermal conductivity, improve surface hardness and smoothness of molded parts, and improve the mechanical strength of polyethylene.
Adding different proportions of talcum powder will have different effects on the physical properties of polyethylene materials,The best addition ratio is 10-15%.For polyethylene blown film, filling superfine talcum powder masterbatch is better than other fillers, easy forming and good processability. Moreover, this kind of film can reduce the oxygen transmission rate by 80%, and is especially suitable for packaging oily foods, such as peanuts, broad beans, etc., and can keep oil and deterioration for a long time: this kind of film can reduce the water vapor transmission rate by 70%, has good moisture resistance, is very suitable for underground geotextile moisture-proof cloth, and is also suitable for packaging food.