Food grade silica from PPG: High-Performance Solutions Empowering Global Food & Feed Manufacturing

In the modern food and animal nutrition industry, powdered product flow, anti-caking, liquid carrier efficiency, and production safety have become core challenges for manufacturers. As a global pioneer in synthetic precipitated silica, PPG Industries has launched the FLO-GARD™ series food-grade silica with over 30 years of food application experience, providing safe, efficient, and sustainable flow conditioning, anti-caking, and carrier solutions for the food and feed industry.

PPG’s Leading Position in Food-Grade Precipitated Silica

PPG pioneered the research and development of synthetic precipitated silica in the 1930s, and has long been a global leader in silica manufacturing. For more than 30 years, PPG’s FLO-GARD™ food-grade silica has been widely recognized by food formulators worldwide, solving the problems of powder caking, poor fluidity, and difficult liquid loading in food production, and helping enterprises improve production efficiency and product quality.

The FLO-GARD™ series covers full-scenario food applications, from large-particle products such as FLO-GARD LPC to ultra-fine particle products such as FLO-GARD T-800, meeting the customized needs of different powdered foods. Among them, FLO-GARD SP is the core representative product, which is widely used in daily food processing with its balanced performance and cost-effectiveness.

Core Properties of PPG Food-Grade Silica

PPG food-grade silica is a synthetic amorphous precipitated silica, with stable and excellent physical and chemical properties:

• Appearance & Sensory: Pure white free-flowing powder, odorless and tasteless, neutral pH (typical 6.9), no impact on food flavor, color and nutrition;
• Particle Characteristics: Uniform particle size (FLO-GARD SP is 45μm), controllable distribution, suitable for different food particle matching;
• Adsorption Capacity: High oil absorption (FLO-GARD SP DOA 275mL/100g), strong moisture and oil absorption capacity;
• Purity & Safety: No detectable crystalline silica (detection limit <0.1% by weight), main component SiO₂ hydrate ≥87.0%, in line with food-grade purity requirements;
• Chemical Stability: Chemically inert, insoluble in water, no reaction with food ingredients, stable under normal storage and use conditions.

Core Performance Advantages

1. Ultra-High Carrier & Absorption Capacity

PPG’s latest research shows that FLO-GARD™ silica has a liquid carrying capacity more than 40 times that of maltodextrin (up to 67.0% for FLO-GARD SP). Only a small amount of silica can convert liquid flavors, nutrients, and oils into dry free-flowing powder (Dry Liquid Concentrate, DLC), greatly reducing the amount of carrier used and cutting production costs.

2. Excellent Flow Conditioning & Anti-Caking

It improves powder fluidity through multiple mechanisms:

• Isolate irregularly shaped food particles;
• Adsorb surface moisture of particles to eliminate agglomeration;
• Form a dry lubricating layer on the surface of sticky particles;
• Stabilize electrostatic charge to prevent particle adhesion.

Effectively avoid clogging of screens, hoppers and conveying equipment, and optimize the packaging and production process.

3. Low Dust & Easy Blending

Uniform particle size eliminates the need for pre-mixing, and can be directly metered into production lines, mixers or spray dryers. In spice applications, the dust generation of FLO-GARD SP is lower than that of sodium aluminosilicate and other traditional anti-caking agents, improving the occupational safety of the production workshop.

4. Wide Compatibility & Easy Switching

It is suitable for standard commercial hoppers, conveyors, mixers and other equipment, and manufacturers switching from maltodextrin to PPG silica do not need to modify production lines or invest in new equipment.

Wide Application Scenarios

PPG FLO-GARD™ food-grade silica is widely used in the food industry, fully compliant with the addition limit regulations of FDA 21 CFR (generally ≤2% of finished product weight, ≤1% for dried egg products):

• Condiments: Granulated salt, chili powder, paprika, garlic salt, onion salt, seasoning powder;
• Beverages: Powdered drink mixes, instant coffee, instant tea;
• Dairy & Protein: Powdered milk, protein powder, non-dairy creamer;
• Bakery: Pancake & cake mixes, powdered sugar;
• Others: Guar gum, dried eggs, grated cheese, fruit and vegetable powder.

Safety, Compliance & Certifications

PPG food-grade silica has passed strict safety and regulatory certifications, ensuring food safety:

• Toxicological Safety: No acute toxicity, irritation, sensitization, carcinogenicity (IARC 3) and reproductive toxicity; long-term exposure tests show no damage to respiratory tract and organs;
• Regulatory Approval: Compliant with FDA 21 CFR 172.480, 133.146, 160.105 and other clauses, listed in the Food Chemical Codex (FCC);
• Certification: Kosher certified for Passover and year-round use;
• Transport & Storage: Not classified as dangerous goods by DOT, IMDG and IATA, no special transportation restrictions.

Packaging, Storage & Handling Guidelines

Packaging

Standard packaging includes multi-wall paper bags (20lb/9kg, 44lb/20kg) and Flexible Intermediate Bulk Containers (FIBC, 600lb/272kg), palletized and stretch-wrapped for moisture protection.

Storage

• Store in a dry, clean, cool and ventilated environment, away from direct sunlight, acids, oxidants and strong alkalis;
• No shelf life under proper storage; products stored for more than 1 year need to retest moisture content;
• Pallets are prohibited from double stacking to avoid product damage.

Handling

• Wear protective equipment (safety glasses, chemical-resistant gloves) during operation;
• Prohibit eating, drinking and smoking in the operation area;
• Avoid high-temperature calcination (>800℃) to prevent product structure changes.

Technical Support & Sustainable Value

PPG provides full-chain technical services for global customers:

• US customer service: 1-800-243-6745; European customer service: +31-596-676710;
• Professional team provides customized product selection and process optimization according to application scenarios.

In terms of sustainability, PPG food-grade silica helps manufacturers achieve green production:

• Concentrated DLC products reduce packaging materials and transportation carbon emissions;
• Extend food shelf life and reduce food waste;
• High efficiency reduces raw material consumption and meets the sustainable development goals of the food industry.

Conclusion

With leading technology, reliable safety, and excellent performance, PPG FLO-GARD™ food-grade silica has become the preferred additive for flow conditioning, anti-caking and liquid loading in the global food and feed industry. PPG will continue to focus on the innovation of food-grade silica products, help the food industry achieve efficient, safe and sustainable production, and become a long-term partner for manufacturers to upgrade product quality and production efficiency.

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