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| Quantity: | |
|---|---|
Parameter | Description | Value/Range |
Material | Calcium Carbonate Type | Ground Calcium Carbonate (GCC) / Precipitated Calcium Carbonate (PCC) |
Particle Size | Average Particle Diameter (µm) | 0.5 - 50 (depends on application and processing requirements) |
Particle Shape | - | Scalenohedral, Rhombohedral, or Spherical (depending on production method) |
Whiteness | - | ≥90% (ISO brightness) |
Oil Absorption | - | 15 - 40 g/100g (depends on particle size and shape) |
Bulk Density | - | 0.4 - 0.7 g/cm³ (depends on particle size and packing) |
Moisture Content | - | ≤0.5% (weight basis) |
Chemical Composition | CaCO₃ Content (%) | ≥98% (purity may vary based on grade and source) |
pH Value | - | 8.0 - 10.5 (aqueous suspension) |
Reinforcement Effect | Tensile Strength Improvement (%) | 5 - 20% (depends on plastic matrix and formulation) |
Flexural Modulus | Increase in Flexural Modulus (%) | 10 - 30% (depends on plastic type and loading level) |
Impact Strength | Change in Izod Impact Strength (%) | ±5% (can vary; some formulations may show improvement, while others may show slight decrease) |
Thermal Stability | Decomposition Temperature (°C) | >800°C (under standard conditions, calcium carbonate decomposes to calcium oxide and carbon dioxide) |
Application | Reinforced Plastic Composite Powders | Fillers for PP, PE, PVC, ABS, nylon, and other thermoplastics |
This white powder offers exceptional reinforcement and cost efficiency in plastic formulations, enhancing mechanical properties while reducing material costs. Its hydrophobic surface treatment (stearic acid or titanate coupling agents) ensures excellent dispersion in polyolefins, PVC, and engineering plastics, making it a preferred choice for injection molding, extrusion, and blow molding processes.
Superfine Particle Technology:
Controlled Particle Size: Available in grades from 1μm (ultrafine) to 10μm (fine), with narrow distribution (D90 ≤3x D50) to optimize filler-polymer interaction and processability.
High Aspect Ratio: Platelet-shaped particles (aspect ratio 3–5) enhance stiffness (modulus +20–30%) and impact resistance (Charpy impact +15%) in polypropylene (PP) and polyethylene (PE) composites.
High Purity and Low Impurities:
98% Minimum Purity: MgCO₃ <1.5%, Fe₂O₃ <0.1%, and Al₂O₃ <0.5%, suitable for light-colored and translucent plastic products (yellow index ≤5).
Low Heavy Metals: Pb <20ppm, Cd <5ppm, compliant with RoHS 2.0 and REACH SVHC, ideal for consumer electronics and automotive interiors.
Surface Functionalization:
Hydrophobic Modification: Stearic acid coating (1–3%) improves wetting in non-polar polymers, reducing melt viscosity (10–15% lower torque in internal mixers) and preventing filler agglomeration.
Reactive Coupling: Titanate-treated grades form covalent bonds with polymer chains, enhancing interfacial adhesion and reducing filler migration in PVC-U pipes (long-term hydrostatic strength +8%).
Plastic Packaging:
Blown Film: Added to PE stretch film (5–15% loading) to improve puncture resistance (25% higher load at break) and reduce film thickness by 10–15%, lowering material costs.
Injection-Molded Containers: Reinforces PP food containers, increasing heat resistance (deflection temperature +15°C) and reducing sink marks in thin-wall packaging.
Construction Plastics:
PVC Pipes and Profiles: Fills PVC compounds (20–40% loading), improving dimensional stability (linear expansion coefficient -12%) and UV resistance (QUV aging test ΔE ≤3 after 1000 hours).
Composite Decking: Mixed with HDPE and wood fibers, enhancing resistance to moisture absorption (thickness swelling -20%) and improving screw retention strength (pull-out force +18%).
Automotive Plastics:
Interior Trim Parts: Reduces weight of PP talc composites by 10% when used as a partial talc replacement, while maintaining stiffness (flexural modulus 1500–2000 MPa).
Under-the-Hood Components: Heat-stabilized grades (coated with silane) withstand under-hood temperatures (120°C) in PA66 formulations, improving fatigue resistance (cycles to failure +25%).
Consumer Electronics:
LED Lamp Housings: Enhances thermal conductivity (0.3–0.5 W/m·K) in PC/ABS alloys, improving heat dissipation and extending LED lifespan (lumen maintenance ≥90% after 50,000 hours).
Keyboards and Casings: Reduces warpage in ABS injection parts (warpage ≤0.5mm for 100mm span) while maintaining surface gloss (60° gloss ≥85).
