Wufeng Weitai Bull Barium Sulfate WT-138 for Rubber and Plastic Applications

‌Product Overview‌

Wufeng Weitai Bull Barium Sulfate WT-138 is a specialized extinction-grade barium sulfate engineered to deliver exceptional matting performance, high filler loading capacity, and enhanced coating durability in powder coating applications. With a precisely controlled particle size distribution (700 mesh / ~20 µm) and a whiteness level of ‌83% (ISO 2470)‌, this product optimizes surface aesthetics while reducing formulation costs by enabling ‌20–30% higher filler incorporation‌ compared to conventional talc or silica matting agents.

Sourced from natural high-purity baryte ore in Wufeng Tujia Autonomous County, Hubei Province, and processed through advanced micronization technology, WT-138 combines chemical inertness with outstanding weather resistance. Its unique particle morphology ensures:

• ‌Uniform Light Diffusion:‌ Achieves consistent matte finishes (60° gloss: 15–30 GU) without haze or surface defects.
• ‌Suspension Stability:‌ Zero sedimentation in resin systems due to matched density (4.3 g/cm³) and optimized rheology.
• ‌Broad Compatibility:‌ Seamless integration with epoxy, polyester, polyurethane, and hybrid powder coating resins.

Certified under ISO 9001 and RoHS, WT-138 is the ideal choice for formulators seeking to balance cost efficiency with premium coating performance in automotive, architectural, and industrial applications.

‌Key Features & Competitive Advantages‌

1. ‌Superior Matting Performance‌

   • ‌High Extinction Efficiency:‌ Reduces gloss by 50–70% at 10–15% loading (vs. 20–25% for calcium carbonate).
   • ‌Surface Smoothness:‌ Minimizes orange peel effect via monodisperse particle distribution (PDI <0.25).
   • ‌UV Stability:‌ Maintains color fidelity after 1,000+ hours of QUV-B exposure (ASTM G154).

2. ‌Formulation Flexibility & Cost Savings‌

   • ‌High Loading Capacity:‌ Up to 40% filler incorporation without compromising flow or curing kinetics.
   • ‌TiO2/Resin Reduction:‌ Low oil absorption (18–22 g/100g) cuts resin demand by 12–15%.
   • ‌Process Optimization:‌ Reduces extrusion torque by 10–18% in twin-screw compounding (ASTM D2538).

3. ‌Enhanced Coating Durability‌

   • ‌Chemical Resistance:‌ Withstands acids (pH 2), alkalis (pH 12), and solvents (MEK rubs >100 cycles).
   • ‌Abrasion Resistance:‌ Improves Taber abrasion resistance by 25% (ASTM D4060) at 20% loading.
   • ‌Thermal Stability:‌ No decomposition below 1,500°C, ideal for high-bake powder coatings.

4. ‌Sustainable & Safe‌

   • ‌Natural Mineral Base:‌ Heavy metal content ≤10 ppm (Pb/Cd/As) compliant with EU REACH.
   • ‌Low Carbon Footprint:‌ 30% lower CO₂ emissions vs. synthetic barium sulfate.
   • ‌Dust-Free Handling:‌ OSHA-compliant granulation with ≤0.3% respirable particles.

‌Technical Specifications‌

‌Applications‌

WT-138 is engineered for excellence in powder coatings across industries:

‌1. Architectural Powder Coatings‌

• ‌Facade Panels:‌ Provides uniform matte finishes with Class A fire resistance (ASTM E84).
• ‌Aluminum Profiles:‌ Enhanges adhesion and corrosion resistance in outdoor applications.
• ‌Anti-Graffiti Coatings:‌ Facilitates easy cleaning without gloss alteration.

‌2. Automotive & Transportation‌

• ‌Wheel Rims:‌ Improves chip resistance and thermal cycling performance (-40°C to 200°C).
• ‌Engine Components:‌ Withstands oil, grease, and high-temperature exposure.
• ‌Interior Trims:‌ Halogen-free matting for low-VOC compliance.

‌3. Industrial Equipment‌

• ‌Agricultural Machinery:‌ Resists UV degradation and chemical fertilizers.
• ‌HVAC Systems:‌ Anti-static properties (surface resistivity: 10⁹–10¹¹ Ω/sq).
• ‌Electrical Enclosures:‌ Flame-retardant grades (UL94 V-0 achievable).

‌4. Consumer Goods‌

• ‌Appliances:‌ Scratch-resistant finishes for refrigerators and ovens.
• ‌Furniture:‌ Low-temperature cure compatibility (120–140°C).
• ‌3D Printing:‌ Rheology modifier for powder bed fusion (PBF) processes.

‌Production Process & Quality Control‌

1. ‌Ore Selection:‌ Natural baryte ore with ≤10 ppm heavy metals (XRF verified).
2. ‌Crushing & Grinding:‌ Jaw crushers → Raymond mills → 200-mesh pre-refinement.
3. ‌Purification:‌ Froth flotation (acid-free) to remove silica/iron impurities.
4. ‌Micronization:‌ Wet grinding with zirconia beads to 700 mesh fineness.
5. ‌Surface Modification:‌ Stearic acid coating for hydrophobic dispersion.
6. ‌Drying & Classification:‌ Spray drying + air-jet sieving (D100 ≤ 30 µm).
7. ‌Quality Assurance:‌
   • ICP-MS for heavy metals (Pb/Cd/As <10 ppm).
   • SEM analysis for particle morphology.
   • Batch-wise ISO 9001 certification.

‌Why Choose Wufeng Weitai WT-138?‌

1. ‌Technical Excellence‌

   • Patented grinding technology for ultra-uniform particle distribution.
   • Customizable surface treatments (silane, titanate, or non-ionic).

2. ‌Resource & Cost Advantages‌

   • Vertically integrated mining-to-production chain ensures price stability.
   • 50,000-ton annual capacity with rapid lead times (7–10 days).

3. ‌Sustainability Commitment‌

   • 85% process water recycling and 60% renewable energy usage.
   • Zero-waste production with 99% raw material utilization.

4. ‌Customer-Centric Service‌

   • Free sample testing and formulation optimization support.
   • 24/7 technical assistance for extrusion, curing, and gloss control.

‌Competitive Comparison: WT-138 vs. Alternatives‌

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