TEGO Foamex 843 is a German-origin defoamer, formulated as a polyether-silicone/nanosilica compound. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a translucent homogeneous liquid with a viscosity of 200-500 mPa·s. It maintains stable activity under pH 3-10 and temperatures ≤55°C, achieving 90% foam suppression at a dosage of 0.03%-0.1%. Certified by REACH, ISO 9001, and GB 9685-2016, it enhances print dot clarity (dot gain ≤1.0%) and leveling (Ra≤0.15 μm) in water-based flexo and UV gravure inks.
Millisecond Response: Equipped with 0.9 μm nanoparticles that collapse foam in 300 ms (per ASTM D892-III standards), ensuring ultra-rapid foam control for high-speed applications.
High-Speed Compatibility: Maintains stability at press speeds ≥800 m/min, making it ideal for fast-paced printing processes.
Self-Wetting Design: Reduces contact angle from 105° to 25° on substrates, improving wetting and adhesion for smoother, more uniform finishes.
Food Safety Compliance: Meets FDA 21CFR 175.300 standards, suitable for inks used in food contact packaging.
Flexible Food Packaging: Controls trailing (ΔE≤0.2) on NY/CPP (nylon/cast polypropylene) substrates at speeds ≥700 m/min, ensuring consistent print quality in food packaging.
Label UV Inks: Achieves ≤0.8% dot gain under electron beam (EB) curing at ≥200 mJ/cm², maintaining precision in label printing.
Aseptic Carton Printing: Limits oxygen transmission to ≤5 cc/m²/day, preserving the barrier properties of aseptic cartons.
Appearance | Translucent homogeneous liquid |
Active Content | Modified polyether-silicone + nanosilica (22%) |
Dynamic Viscosity | 200-500 mPa·s |
pH Range | 3-10 |
Density | 0.98-1.05 g/cm³ |
Surface Tension | 22.9 dyn/cm |
Shear Stability | No stratification (10,000 rpm/30min) |
Addition Stage | Pre-dispersion or ink adjustment phase |
Shelf Life | 18 months (sealed, 5-40°C) |
Packaging | 20kg/galvanized drum or 200kg/IBC tote |
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China