Surface modification of wollastonite, has better dispersivity and processing fluidity, stronger bonding force with surface of organic polymer substance, improved mechanical property and ageing resistance when applied in composite materials. Wollastonite has better strength and stiffness than calcium carbonate and talc. It helps the automotive industry to lightweight.

Active wollastonite powder is a new type of inorganic filling material without toxicity and pollution. It has good dispersibility and solubility in polymer system, low oil absorption value, can reduce the viscosity of the system, improve the processing performance of products, and is an ideal high-grade filler for PP, PA, ABS and other plastic products.

It is widely used in rubber, plastics, nylon, wires and cables, PVC soft and hard pipes, heterosexual plastics, sole, engineering plastics, other plastic products and other polymer based composite inorganic reinforcing fillers. After filling polycarbonate with wollastonite treated by coupling agent, its elastic modulus is three times of that without filling, and its strength is increased by about 15%. Filling it into polyethylene can improve its strength and electrical insulation performance. Filling it into polypropylene, compared with the unmodified wollastonite, under the same filling amount, its tensile strength and bending strength are significantly improved.