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Enhanced Wollastonite Fiber
Made from natural wollastonite ore as raw material, advanced grinding technology and modified treatment, the main component is calcium silicate, with a molecular formula of CaSiO3.
Product Overview
1.Description
Made from natural wollastonite ore as raw material, advanced grinding technology and modified treatment, the main component is calcium silicate, with a molecular formula of CaSiO3. The theoretical chemical composition is CaO 48.3% and SiO2 51.7%. Calcium in wollastonite is often replaced by ions such as Fe, Mn, Ti, and Sr, resulting in a homogeneous structure. Therefore, pure wollastonite is relatively rare in nature. Wollastonite belongs to a chain like silicate with fibrous and needle like crystal structures. The Mohs hardness of wollastonite is 4.5-5.5, the specific gravity is 2.78-2.91, the melting point is 1540 ℃, the coefficient of thermal expansion is low, and the coefficient of thermal expansion is 6.5X10-6mm/(mm. ℃) at 25-800 ℃. The pH value is around 9.0, and the appearance is white or gray with a pearl luster on the cleavage surface. Difficult to dissolve in alkali, soluble in strong acid, but chemically inert than calcium carbonate (CaCO3). Due to its unique crystal structure, wollastonite has excellent insulation, dielectric properties, high heat resistance, and weather resistance. Therefore, wollastonite is widely used in various fields such as ceramics, chemical industry, metallurgy, papermaking, plastics, coatings, rubber, etc.
KDJ
Project | Unit | JLH-SW6-A | JLH-SW6 | JLH-SWX11 | JLH-SWLR8 | JLH-SWLR12 |
Whiteness，≥ | % | 88.0 | 85.0 | 90.0 | 85.0 | 88.0 |
Grain size，D50 | μm | 5.5±1.0 | 8.8±1.2 | 15.0±1.5 | 28±2.5 | 18.0±1.8 |
Loss on ignition，≤ | % | 4.0 | 4.0 | 4.0 | 2.5 | 2.5 |
| SiO₂ | % | 44-56 | 44-56 | 44-56 | 46-54 | 46-54 |
| CaO | % | 40-50 | 40-50 | 40-50 | 40-50 | 40-50 |
| Fe₂O₃，≤ | % | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
Volatile component，≤ | % | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Product features
3.Product features
(1) Nylon: Low moisture absorption, increased heat resistance and deformation temperature, meets coating and paint grade standards, improves thermal conductivity and structural stability, cost-effective grinding and shredding, the best substitute for fiberglass.
(2) Polyurethane: Low moisture absorption, improves paint appearance, reduces suspension viscosity, low linear thermal expansion coefficient, increases heat-resistant deformation temperature, does not deposit or become a hard bottom in casting compounds. As a cost-effective substitute for ground glass in reinforced reaction injection molded and low-density reaction injection molded composite materials.
(3) Polypropylene (PP)/Thermoplastic Olefins (TPO): Improve scratch resistance, low-temperature impact/thermal sinking, high-quality stiffness and impact strength, reduce linear thermal expansion coefficient, increase heat-resistant deformation temperature, and save costs compared to synthetic fibers.
(4) Liquid crystal polymer (LCP)/PBT/PET polyester epoxy resin/polyphenolic plastic: improves paint appearance, increases dispersion and wetting, improves mold flow and cycle time, enhances physical and mechanical properties, increases heat-resistant deformation temperature, reduces water sensitivity of composite materials, cost-effective grinding and shredding, and is the best substitute for fiberglass.
Cases
Application case of wollastonite fiber in engineering plastics
Add wollastonite fiber
Product name | Halogen free flame retardant PP | Add Scale | 5% | |
base material | PP | / | ||
Test room environmental conditions | 23±2°C，50±10RH | |||
Test project | unit | test method | Test conditions | Test values |
tensile strength | Mpa | ASTM D638 | 50mm/min | 21 |
elongation at break | % | ASTM D638 | 50mm/min | 20 |
bending strength | Mpa | ASTM D790 | 5mm/min | 34 |
Flexural modulus | Mpa | ASTM D790 | 5mm/min | 1600 |
Impact strength of cantilever beam gap | KJ/㎡ | ASTM D256 | KJ、23℃ | 35 |
Heat distortion temperature | °C | ASTM D648 | 0.45Mpa | 100 |
Melt flow velocity | g/10min | ASTM D1238 | 280°C，5kg | 15 |
density | g/cm² | ASTM D792 | 23°C | 1.04 |
Flame retardant performance | Class | UL94 | 1/8IN(3.2mm) | V0 |
Glow wire | °C | GB/T 5169.10/12-2013 | 750°C/800°C | conform to |
Remarks:
(1) The performance of the dye may differ from the above values.
(2) The test values are averages and are for reference only.
(3) When there is a difference between the UL yellow card physical property data and the above values, the physical property table data shall prevail. | ||||
Application of Wollastonite Fiber in Coatings
(1) Industrial coatings: enhance film adhesion, improve mechanical properties, enhance anti brittle fracture and anti peeling properties, reduce oxygen concentration, form necessary protective film, have synergistic effect on preservatives, improve surface uniformity and reactivity, reduce film transmittance, and minimize cracks and fissures.
(2) Architectural coatings: economical and practical, with controllable gloss, improving durability, extending paint surface life, improving coating brightness, improving wettability, reducing foam, and preventing corrosion in containers and nail heads. Good stability to prevent a decrease in pH value.
(3) Powder coating: reduces gloss, saves costs, enhances anti-corrosion and anti cracking properties, strengthens color fastness and waterproof anti-corrosion properties. Powder primer is easy to adhere, has good thermal stability, prevents UV and chemical erosion, and increases dispersion and immersion.
Application of Wollastonite Fiber in the Rubber Industry
(1) In plastics, due to the needle like structure of wollastonite powder, it can improve the electrical insulation, impact strength, and tensile strength of the product, as well as improve the linear tensile and mold shrinkage rate of the product. Ethylene, thermosetting polyester plastic sol, nylon, and polypropylene can all be compounded with silica fume. In terms of improving tensile strength and flexural strength, silica fume is superior to other inorganic fillers and has particularly good moisture resistance. When filled in large quantities, the increase in system viscosity is relatively small. Mainly used in plastics such as PE, PVC, PP, PA, ABS, PC, PET, PBT, etc., it can partially or completely replace traditional glass fiber and play a significant reinforcing role. The highest dosage in PP can reach 30-50%.
(2) Wollastonite is a unique needle shaped fiber structure with good insulation, wear resistance, and high refractive index, making it an excellent filling material for rubber products. It can enhance the flowability of the rubber material and improve the tensile strength, tear resistance, impact strength, linear tension, and shrinkage rate of the product, which can improve the aging resistance, fatigue resistance, and other properties of the product.
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