Needle-like wollastonite fibers

1, the source
Acicular wollastonite wollastonite fiber is a natural mineral powder made by crushing a special process, mainly composed of calcium silicate, molecular formula CaSiO3, theoretical chemical composition of CaO48.3%, SiO251.7%. Ca in wollastonite often Fe, Mn, Ti, Sr, plasma exchange, isomorphous body, so rare in nature pure wollastonite. Wollastonite is a chain of partial silicate crystals were fibrous, needle-like structure.
2, physical and chemical properties
Needle-like wollastonite fibers Mohs hardness of 4.5 to 5, the proportion of 2.78 to 2.91, melting point 1544 ℃, pH value of 9.5 or so, look for white or gray, cleavage surface of pearl luster. Insoluble in alkali, soluble in acid, but stronger than the calcium carbonate chemical inertness (CaCO3). Crystal form because of its special structure determines its nature, wollastonite has good insulation properties, dielectric properties, high heat resistance, weathering resistance. Which is widely used in wollastonite ceramics, chemical industry, metallurgy, paper, plastics, paints, rubber and other fields. 3, needle-like wollastonite fibers in the application of rubber materials
(1) in the plastic, due to needle-like wollastonite fibers were needle-like structure, it can improve products, electrical insulation, impact strength, tensile strength, improved tensile and modulus of linear products shrinkage. Ethylene, polyester thermosetting plastic sol, nylon and polypropylene fibers are available to needle-like wollastonite composite, in improving the tensile strength and flexural strength, the needle-like wollastonite fiber better than other inorganic fillers, and has a particular good moisture performance in a large number of filling, the smaller the incremental viscosity. Mainly used for PE, PVC, PP, PA, ABS, PC, PET, PBT and other plastics.
(2) needle-like wollastonite fibers are needle-like fiber structure unique, good insulation, wear resistance and high refractive index, is a well-filled rubber material. Enhance liquidity and improve rubber products, tensile strength, tear strength, impact strength, tensile strength and modulus of linear shrinkage, can anti-aging products, anti fatigue performance is improved. 4, the product-related indicators