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Wollastonite
Wollastonite is a natural metasilicic acidic mineral. Its molecular formula is CaSiO3, and its constitutional formula is Ca3[Si3O9]. Wollastonite is triclinic. It is normally a white, greyish or ruddy assemblage of acicular and fibrous shapes. It shows vitreous luster, and the cleavage surface shows nacreous luster. Its hardness reaches 4.5-5.0, the expansion coefficient is 6.5×10-6 mm/(mm·℃), the melting point is 1540℃, the density is 2.75～3.10g/cm3. Wollastonite has low conductivity, good insulation, low water solubility and oil absorbency. Its solubility in neutral water is no more than 0.0095g/100ml. With unique acicular shape and stable chemical property, wollastonite is featured with good heat resistance, hard wearing and corrosion resistance, and strengthening and reinforcing functions. Being innocuous, flavorless, and non-radioactive, it is extensively applied in functional paint, rubber and plastic, friction materials, building materials, paper making, metallurgy. Wollastonite fiber is environmental inorganic functional filling of high quality.

Wollastonite fiber products
FJS wollastonite is world famous for its large crystal and bunchiness. Relying on the favorable mineral resources, FJS Wollastonite Fiber Co., LTD (FJS Co.) adopts state-of-the-art equipment for extracting, crashing, grading, surface modification, automatic wrapping, and testing, and other automatic control system. Blessed with top techniques, stable quality, good management, FJS Co. is able to produce ultrapure, ultrafine, ultra-long wollastonite fiber products with high slenderness ratio and granularity which can be 6000 meshes( at least). With good quality, FJS products are widely adopted in plastic, rubber, paint, porcelain, friction materials and metallurgy protection. As functional filling with excellent performance, wollastonite fiber may totally substitute for asbestos materials and partially for fiberglass. It plays an excellent role in upgrading product property and lowering production cost.


Surface modification(Surface treatment)
Being hydrotropic substance, wollastonite shows low compatibility with polymeric substance of organic group. Through surface modification technology, the property of wollastonite surface is changed by use of coupling agent so that the inorganic group at one end of coupling agent integrates with alkyl group on the surface of wollastonite to improve the compatibility between wollastonite and organic polymer. The modified 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. Surface modification for wollastonite mainly includes mechanic-chemical activation, enveloping, use of coupling agent, and inorganic Nano-coating.

Hubei Fengjiashan Wollastonite Fiber Co., Ltd (FJS Co.) commits itself to development and service of wollastonite series products application. It is able to develop and manufacture surface-modified wollastonite fibrous products in accordance with clients’ requirement. FJS Co. is optimizing surface modification technique in order to upgrade product quality and superior service.