From November 7 to 10, 2018, the 2018 China (Yuyao) International Plastics Expo and the 20th China Plastics Expo jointly held by China Petroleum and Chemical Industry Federation, China National Petroleum Corporation, China Petrochemical Corporation, China Chemical Corporation, China Light Industry Federation and Yuyao Municipal People's Government of Zhejiang Province were successfully held in Yuyao, Zhejiang Province 。 The theme of this plastic Expo is "innovation, cooperation and win-win". As a grand meeting of the plastic industry, it shows new materials, new equipment and new processes, and promotes the information exchange and development of the plastic industry.

Inorganic materials are widely used in plastics. The functions of inorganic materials gradually become more prominent with the ultra-fine particle size. Plastics modified with inorganic powder materials have many unique properties and bring new development opportunities to the plastic industry. Inorganic powder particles can give plastics new functions, improve plastic's aging resistance, flame retardant effect, increase thermal change temperature, wear resistance and so on.

Wollastonite is a natural metasilicic acid mineral with the molecular formula CaSiO3 and the structural formula Ca3 [Si3O9]. It is a triclinic crystal, usually presenting as needle-like, fibrous aggregates, white in color, having a unique needle-like physical structure and stability. Chemical properties, low electrical conductivity, good insulation, low water solubility, moisture absorption and oil absorption. Non-toxic, harmless, free of asbestos and heavy metals (in line with Rohs, REACH), it is an ideal white reinforcing and reinforcing inorganic mineral functional filler. The modified wollastonite is used as a high-performance and multifunctional additive material in PA, PP, PE, PVC, ABS, PS, PC, PBT, PF and other plastics, which can significantly improve the mechanical properties of composite materials. Strength, dimensional stability, surface appearance and scratch resistance, with excellent thin-wall forming performance.