Applications of Solvay ZEOSIL 38P Precipitated Silica Powder in Industrial Manufacturing

Solvay ZEOSIL 38P Precipitated Silica Powder supports essential industrial processes by delivering high-performance reinforcement, anti-caking, and rheology control properties. As a direct manufacturer, we supply this material to customers operating in advanced downstream production environments with strict requirements for quality consistency, regulatory compliance, and process integration.

1. Tire Tread Formulation in Green Tire Manufacturing

In the green tire industry, manufacturers use precipitated silica to reinforce the rubber matrix for achieving low rolling resistance and improved wet grip, key parameters for energy-efficient tires. Our material enters the compound mixing stage, where its high dispersion index and controlled surface area allow precise adjustment of dynamic properties to meet international labeling criteria on fuel efficiency, wet braking, and abrasion.

Industry compliance standards

• EU Regulation 661/2009 on type-approval requirements for tires
• UN ECE R117 – Wet grip, rolling resistance, and rolling noise
• ISO 9001:2015-certified process controls
• REACH Annex XVII (no use of restricted substances)

Typical usage ratio

• 20–90 phr (parts per hundred rubber); formulation engineers adjust within this range to target fuel economy and traction balance specific to passenger car, truck, or high-performance tire segments.

Downstream process integration

• Incorporated during internal mixing with rubbers (SBR, BR, NR), coupling agents, and processing oils; intensive mixing ensures fine dispersion before batch is calendered and extruded into treads.

Final product types

• Passenger car eco-tires
• Truck and bus radial (TBR) tires
• Ultra-high performance tires (UHP)
• Winter and all-season tires with wet grip emphasis

2. Industrial Rubber Hose and Conveyor Belt Compounds

Manufacturers of industrial hoses and conveyor belts use precipitated silica for enhancing wear resistance, flexibility, and pressure resistance in critical elastomer-based applications. The material enters mixing lines where demanding end-use conditions require finely tuned reinforcement without excessive heat build-up, supporting custom compound designs for oil, chemical, and abrasion environments.

Industry compliance standards

• ISO 280:2018 — Conveyor belts, testing & tolerances
• ASTM D2000 — Classification System for Rubber Products
• EN ISO 1402:2009 — Hydrostatic pressure for hoses
• RoHS 2011/65/EU & SVHC absence (for belts in electromechanical uses)

Typical usage ratio

• 15–60 phr; technical managers select concentration based on target abrasion index and mechanical property specification set by final product design.

Downstream process integration

• Blended into base elastomer matrix (mainly NR, SBR, EPDM, NBR) during Banbury or extruder mixing; batch is calendared or molded depending on hose/ belt form factor.

Final product types

• Industrial hydraulic and pneumatic hoses
• Mining, bulk material, and processing conveyor belts
• Automotive coolant and fuel hoses
• Chemical- and oil-resistant transfer hoses

3. Oral Care Abrasive in Toothpaste Manufacturing

Oral care companies utilize precipitated silica as a controlled abrasive and thickening agent in toothpaste formulations to achieve satisfactory cleaning without damaging tooth enamel. Addition timing and grade particle size are managed precisely to conform with global health standards and maintain acceptable product rheology, transparency, and flavor stability.

Industry compliance standards

• ISO 11609:2017 — Toothpaste Specification
• FDA 21 CFR 172.480 — Silica as food additive
• EU Cosmetic Regulation (EC) No 1223/2009
• GMP ISO 22716 for personal care product manufacturing

Typical usage ratio

• 5–25 wt% in finished paste; adjusted based on required Relative Dentin Abrasivity (RDA) and silica grade (thickener or abrasive function).

Downstream process integration

• Incorporated into premix tanks after hydration step; high-shear dispersion ensures no agglomerates before addition of surfactants, flavor, and actives.

Final product types

• Standard fluoride toothpastes
• Whitening gels
• Sensitive toothpastes (low RDA)
• Clear and transparent gel toothpaste

4. Food Powders Anti-Caking Aid

Food manufacturers rely on precipitated silica to control flow and prevent caking in hygroscopic powders and powdered blends, including seasonings, instant drinks, and powdered oils. The product’s specific particle size and hydrophilic surface allow precise dosing, avoiding impacts on taste or nutrient value, while meeting food safety and label requirements.

Industry compliance standards

• FCC Food Chemicals Codex Monograph for Silicon Dioxide
• EU Regulation (EC) No 231/2012 purity criteria (E551)
• FSMA-compliant food safety/HACCP controls
• FDA 21 CFR 172.480 — GRAS status for direct addition

Typical usage ratio

• 0.5–2.0 wt% in final blend; dosage dependent on base powder hygroscopicity and handling/packaging conditions.

Downstream process integration

• Dry-blended with bulk food powders prior to packaging or spray-drying; incorporated using ribbon or paddle mixers to ensure homogeneous coverage and maintain flowability after bagging.

Final product types

• Instant beverage powders (e.g., coffee, cocoa, nutritional drinks)
• Soup and seasoning blends
• Powdered non-dairy creamers and fat powders
• Premixed vitamin and mineral food fortifiers

5. Silicone Rubber Compounds for Electrical Insulation and Medical Devices

Producers of silicone rubber products use precipitated silica to tune mechanical strength, transparency, and electrical insulation properties without sacrificing processability. The raw material enters high-consistency silicone rubber (HCR) compounding to achieve stable crosslinking and cleanliness suitable for sensitive end-uses in the healthcare and electrical sectors.

Industry compliance standards

• USP Class VI (for medical device contact materials)
• IEC 60601-1 (electrical safety for medical equipment)
• ISO 10993-5/-10 (biocompatibility testing)
• ROHS/REACH compliant for electrical insulation

Typical usage ratio

• 15–45 phr; compounders adjust level for final product hardness, elongation, and translucency based on component function and regulatory category.

Downstream process integration

• Mixed with silicone polymer gum and crosslinker in two-roll mills or kneaders; batch is vulcanized in compression/injection molds or extruded to desired profile or article shape.

Final product types

• Medical tubing and catheters
• Wire and cable insulation sheathing
• Keypads and sealing gaskets for medical and industrial controls
• Flexible electrical connectors and insulating parts

6. Paints and Coatings Rheological Additive

Coating manufacturers benefit from precipitated silica’s ability to prevent pigment settling and control viscosity throughout production, shipping, and storage. The product’s unique surface chemistry allows adjustment of in-can viscosity and thixotropy, supporting precise film buildup, sag resistance, and spray application in waterborne and solventborne system designs.

Industry compliance standards

• ISO 9001:2015 — Quality management systems for chemical processing
• EN 71-3:2019 — Paint and coating safety for toys
• ASTM D154 – Fineness of dispersion
• REACH-compliant for VOC/hazardous substance limitations

Typical usage ratio

• 0.5–5.0 wt% depending on formulation viscosity target and pigment volume concentration; adjusted for compatibility with binder and pigment system.

Downstream process integration

• Added during the millbase stage with dispersant and pigments for fine pre-wetting; can also be post-added to letdown for final rheology leveling prior to packaging.

Final product types

• Architectural decorative paints
• Industrial marine and protective coatings
• Water-based printing inks
• Automotive refinishing clearcoats and primers