Wufeng Weitai Nano Barium Sulfate 8000 Mesh for Ultra-Fine Coatings

Product Overview‌

Wufeng Weitai Nano Calcium Carbonate 8000 Mesh is a premium-grade, ultrafine calcium carbonate powder engineered through advanced micronization and surface modification technologies. With a meticulously controlled particle size distribution (D97 ≤ 3.5 µm) and an ultra-high specific surface area (18–22 m²/g), this product delivers exceptional performance as a multifunctional filler and modifier across industries including plastics, rubber, coatings, papermaking, cosmetics, and specialty chemicals.

Derived from natural high-purity calcite ore and processed via a zero-waste, eco-friendly production system, this nano calcium carbonate offers:

• ‌Ultra-High Whiteness (≥97% ISO):‌ Ideal for applications requiring optical brightness and color consistency.
• ‌Chemical Stability (pH 8.5–9.5):‌ Resists acid/alkali corrosion and thermal decomposition (<1,200°C).
• ‌Low Oil Absorption (22–26 g/100g):‌ Reduces resin demand and formulation costs.
• ‌Narrow Particle Distribution (PDI <0.3):‌ Ensures uniform dispersion and eliminates agglomeration.

Certified under ISO 9001, REACH, and FDA 21 CFR, this product meets stringent global standards for safety, sustainability, and performance consistency.

‌Key Features & Competitive Advantages‌

1. ‌Superior Functional Performance‌

   • ‌Mechanical Reinforcement:‌ Enhances tensile strength (up to 30%), impact resistance (20–25%), and bending modulus in polymer matrices (ASTM D638/D790).
   • ‌Thermal Stability:‌ Withstands temperatures up to 1,200°C without decomposition, ideal for high-temperature plastics and rubber vulcanization.
   • ‌Surface Modification:‌ Stearic acid-coated variants improve hydrophobicity and polymer compatibility (contact angle ≥110°).

2. ‌Cost Efficiency & Process Optimization‌

   • ‌TiO₂/Plasticizer Replacement:‌ Reduces titanium dioxide usage by 15–20% in coatings and PVC compounds while maintaining opacity (ISO 6504-1: ≥95%).
   • ‌Rheology Control:‌ Thixotropic behavior prevents sagging in vertical coatings and improves mold flow in injection molding (MFI improvement: 10–15%).
   • ‌Energy Savings:‌ Lowers extrusion torque by 12–18% in polyolefin processing (ASTM D1238).

3. ‌Sustainability & Safety‌

   • ‌Heavy Metal-Free:‌ Compliant with EU Toy Safety Directive EN71-3 (Pb/Cd/As ≤1 ppm).
   • ‌Eco-Certified Production:‌ 85% closed-loop water recycling and 60% renewable energy usage.
   • ‌Food/Pharma Compliance:‌ Meets USP/NF and China Pharmacopeia standards for oral/dermal applications.

‌Technical Specifications‌

‌Application-Specific Benefits‌

‌1. Plastics & Rubber Industry‌

• ‌Reinforced Polymers:‌
  • Increases HDPE/PP tensile strength by 25–30% at 15–20% filler loading.
  • Improves PVC impact resistance by 20% (ASTM D256) while reducing plasticizer migration.
• ‌Process Optimization:‌
  • Reduces extrusion torque by 15% in LDPE blown film production.
  • Enhances dimensional stability in engineering plastics (PA6, PBT) under thermal cycling.
• ‌Specialty Applications:‌
  • Anti-static masterbatches (surface resistivity: 10⁹–10¹¹ Ω/sq).
  • Flame-retardant synergist in halogen-free cable compounds (UL94 V-0 achievable).

‌2. Coatings & Inks‌

• ‌Architectural Coatings:‌
  • Replaces 15–20% TiO₂ while maintaining 90+ contrast ratio (ASTM D2805).
  • Improves scrub resistance (≥5,000 cycles, ASTM D2486) and UV stability (QUV-A 1,000 hrs).
• ‌Industrial Coatings:‌
  • Enhances anticorrosion performance in epoxy primers (salt spray resistance ≥1,000 hrs, ASTM B117).
  • Reduces VOC content in waterborne systems via low-oil-absorption formulation.
• ‌Printing Inks:‌
  • Substitutes 30–40% gum rosin in flexo inks without compromising gloss (60° GU ≥85).
  • Improves rheology for high-speed printing (viscosity stability ≥72 hrs).

‌3. Paper & Packaging‌

• ‌Paper Filling/Coating:‌
  • Increases ISO brightness by 2–3 points vs. conventional GCC.
  • Reduces basis weight by 10–15% while maintaining tensile strength (TAPPI T494).
• ‌Functional Packaging:‌
  • Enhances grease resistance in food-grade paperboard (Kit Test ≥12/12).
  • Improves printability via controlled porosity and ink absorption.

‌4. Cosmetics & Pharmaceuticals‌

• ‌Personal Care:‌
  • TiO₂ replacement in sunscreens (SPF boosting, non-comedogenic).
  • Silky texture enhancer in foundations (SPF 15+ achievable at 8–12% loading).
• ‌Oral Care:‌
  • Abrasive agent in toothpastes (RDA value 80–120, ISO 11609).
  • Calcium fortification in chewable tablets (USP <31> compliant).

‌Production Process & Quality Control‌

1. ‌Ore Selection:‌ Natural calcite with ≤0.01% heavy metals (XRF verified).
2. ‌Crushing & Grinding:‌ Multi-stage vertical roller mills to 400 mesh.
3. ‌Purification:‌ Froth flotation to remove quartz and iron oxides.
4. ‌Nano-Micronization:‌ Wet grinding with zirconia beads (D50: 0.8–1.2 µm).
5. ‌Surface Treatment:‌ In-situ stearic acid coating (1.5–2.0% w/w).
6. ‌Drying & Classification:‌ Spray drying + air-jet sieving (D100 ≤ 5 µm).
7. ‌Quality Assurance:‌
   • ICP-MS for heavy metals (Pb/Cd/As <1 ppm).
   • SEM analysis for particle morphology.
   • Batch-wise ISO 9001 certification.

‌Why Choose Wufeng Weitai Nano CaCO₃ 8000 Mesh?‌

• ‌Technical Leadership:‌ Patented micronization technology for unparalleled particle uniformity.
• ‌Global Compliance:‌ REACH, FDA, EU Ecolabel, and Halal/Kosher certifications.
• ‌Sustainability:‌ Carbon footprint ≤1.8 kg CO₂/kg (30% below industry average).
• ‌Custom Solutions:‌ Tailored surface treatments (silane, titanate) and particle size adjustments.