Superfine Silica

Description

1. Product Overview
Superfine Silica is a high-purity, amorphous silicon dioxide engineered for precision dispersion and surface activity. It is primarily used as a rheology modifier, reinforcing filler, and anti-caking agent in elastomers, coatings, adhesives, and food/pharma processing. The key value proposition is its exceptional surface area (150–250 m²/g) combined with low moisture absorption, enabling consistent performance across humidity-sensitive applications. Strategically, it replaces more expensive fumed silica in many formulations while maintaining critical functional metrics, reducing total formulation cost by 12–18%.

2. Key Specifications & Technical Characteristics

• Chemical composition: Amorphous SiO₂ (≥99.8%), trace Al₂O₃ + Fe₂O₃ ≤0.2%

• Purity grade: Industrial premium / Food-contact certified option available

• Physical form: White, free-flowing micro-powder

• Mean particle size (D50): 1.5 – 4.0 µm (laser diffraction)

• Specific surface area (BET): 150 – 250 m²/g

• Tap density: 0.12 – 0.18 g/cm³

• pH (5% slurry): 6.5 – 7.5 (neutral)

• Loss on drying (105°C): ≤0.8%

• Packaging options: 10 kg multi-wall paper bags, 500 kg FIBC bulk bags, 20 MT flexitainer

• Shelf life: 24 months in unopened, dry storage (<50% RH)

3. Core Industrial Applications

• Rubber & Tires (primary industry): As a semi-reinforcing filler for natural and synthetic rubber – improves tear strength and abrasion resistance without increasing compound viscosity. Outperforms clay and calcium carbonate by maintaining lower heat buildup in dynamic applications.

• Paints & Coatings: Anti-settling agent and matting agent for solvent-based and waterborne systems. Provides superior suspension stability over fumed silica at 30% lower raw material cost.

• Adhesives & Sealants: Thixotropy control for vertical-gap applications. Prevents sagging and drip loss. More efficient than hydrogenated castor oil due to shear-thinning recovery within 0.2 seconds.

• Pharmaceuticals & Nutraceuticals: Glidant and tablet disintegrant. Meets USP/NF, EP, and JP purity monographs. Reduces powder bridging in high-speed encapsulation lines.

4. Competitive Advantages

• Quality consistency: Batch-to-batch particle size CV <5% – validated by ISO 9001:2024 certified QC labs.

• Supply reliability: Three geographically diverse production hubs (Asia, Middle East, Europe) ensuring <5-day contingency coverage.

• Logistics capability: In-house bagging and palletizing lines capable of 5,000 MT/month export volume.

• Price competitiveness: 14–22% lower than equivalent fumed silica or precipitated silicas from major European suppliers, at identical functional specs.

• Sustainability benefit: Produced via low-carbon hydro-thermal process; 95% of process water recycled; non-hazardous under CLP and GHS.

• Technical support: Full SDS, TDS, formulation compatibility reports, and rheology modeling provided within 24 hours of request.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT (one standard 20’ dry container)

• Loading capacity: 20 MT per 20’ container (FIBC or palletized paper bags)