Calcium carbonate ground (GCC)

Description

1. Product Overview
This product is a high-purity, dry-ground calcium carbonate (GCC) derived from selected natural marble or limestone deposits. It serves as a functional filler and extender primarily in plastics, paints, sealants, adhesives, rubber, and construction materials. The key value proposition is its ability to optimize compound costs while enhancing mechanical properties (stiffness, impact resistance, and whiteness) without compromising processability. Strategically, GCC is indispensable for global supply chains seeking to reduce reliance on petrochemical-based intermediates and improve material circularity.

2. Key Specifications & Technical Characteristics

• Chemical composition: CaCO₃ ≥ 98.5%, MgCO₃ ≤ 0.8%, Fe₂O₃ ≤ 0.05%, acid-insoluble matter ≤ 0.5%

• Purity level / Grade: Industrial filler grade (option: coated/uncoated with stearic acid available for plastics)

• Physical characteristics:

  • Form: Dry micronized powder

  • Color: White (L* value ≥ 94)

  • Particle size (D50): 1.5 µm, 3.5 µm, 8 µm, 12 µm (customizable)

  • Top cut (D98): ≤ 45 µm

  • Bulk density (tapped): 0.8 – 1.2 g/cm³

  • Moisture: ≤ 0.2%

  • Oil absorption: 15 – 20 g/100g

• Packaging options: 25 kg HDPE/paper valve bags, 1 MT jumbo FIBC bags, or pneumatic tanker truck / bulk vessel delivery

• Shelf life: 24 months in dry, closed, non-reactive conditions

3. Core Industrial Applications

• Plastics & compounds (masterbatch, pipes, profiles, films): GCC reduces raw material costs while improving thermal conductivity, impact strength, and dimensional stability. Outperforms precipitated calcium carbonate (PCC) in lower water absorption and better flowability at equivalent loadings.

• Paints & coatings (architectural, industrial): Provides excellent opacity, low abrasion on milling equipment, and fast dispersion. Outperforms talc or kaolin in brightness and cost-per-ton coverage.

• Adhesives & sealants (hybrid, acrylic, silicone): Controls rheology and shrinkage. Preferred over fumed silica for cost-efficient bulk filling and lower viscosity build-up at high loadings.

• Construction (dry-mix mortars, tile adhesives, putties): Enhances workability, water retention, and mechanical strength. Strategic advantage: reduces cement content per ton of mortar, lowering CO₂ footprint.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025 certified with real-time particle size monitoring per EN 12924. Typical batch-to-batch D50 variation ≤ ±0.3 µm.

• Supply reliability: Multi-quarry sourcing + dedicated milling plants (dedicated capacity ≥ 50,000 MT/month) with 2-week safety stock.

• Logistics capability: Bulk shipping via rail, pneumatic road tankers, or 20′ & 40′ containers to 40+ countries. Average lead time: 10 days ex-plant, 25 days CIF major ports.

• Price competitiveness: 12 – 18% lower total landed cost vs premium PCC alternatives; volume-based tiered pricing visible on platform.

• Sustainability & environmental: Zero process wastewater; recycled bagging materials; available carbon footprint declaration (Scope 1–3) per ISO 14067.

• Technical support: Free lab-scale trials, formulation advisory, and on-site dispersion testing provided by application engineers.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20 MT (equivalent to one dry bulk container or 20 x 1 MT jumbo bags)

• Loading capacity (MT per container):

  • 20′ standard dry container: 20 – 22 MT (palletized, max 22 MT depending on bag type)

  • 40′ high-cube container: 26 – 28 MT (non-palletized jumbo bags only)

  • Bulk pneumatic tanker (truck or ISO tank): 20 – 25 MT per load