6250 Mesh Calcined Kaolin - Superior Coverage for Coating Applications

Product Highlights

1. Ultra-Fine Particle Technology

   • Standard grade: 85-90% particles below 2μm

   • Premium Z-1 grade: Over 92% particles below 2μm (China's finest calcined kaolin)

   • Exceptionally low 325 mesh residue (≤0.02%)

   • Significantly enhances paper smoothness and gloss

2. Exceptional Mineral Purity

   • Kaolinite content exceeding 97%

   • Ultra-low impurity levels (Fe₂O₃ < 0.5%, TiO₂ < 0.3%)

   • Consistent mineral composition batch-to-batch

3. Superior Processing Characteristics

   • Outstanding dispersion and fluidity

   • Viscosity concentration up to 86.7%

   • Enables coating formulations with >60% solids content

   • Ideal for high-speed paper machines (up to 1800m/min)

Technical Advantages

4. Optimized Suspension Properties

   • Bulk density: 0.25-0.35 t/m³

   • Excellent thixotropic behavior

   • Platelet structure enhances suspension stability

   • Prevents settling in storage

5. Equipment-Friendly Formulation

   • Low abrasion value (Mohs hardness 3-4)

   • Controlled mullite formation

   • Minimizes wear on paper machine components

   • Extends equipment service life

Quality Specifications

1. Physical Properties

   • Brightness: 90-93% (ISO)

   • Oil absorption: 70-90g/100g

   • pH value: 6.5-7.5

   • Moisture content: ≤0.5%

2. Performance Characteristics

   • Scattering coefficient: 45-50m²/kg

   • Porosity: 1.8-2.2ml/g

   • Refractive index: 1.62

Application Benefits

1. Paper Coating Advantages

   • Improves ink receptivity

   • Enhances print resolution

   • Reduces picking tendency

   • Increases opacity

2. Production Efficiency

   • Faster coating speeds

   • Reduced binder demand

   • Lower drying energy requirements

   • Improved runnability

Packaging & Storage

• 25kg multi-wall paper bags

• 500kg FIBC bulk bags

• 24-month shelf life in dry conditions

• Moisture-proof packaging available

Technical Support

• Customized particle size distributions

• Application formulation assistance

• Quality consistency guarantees