DOW DOWSIL AFE-7820 is a high-performance silicone emulsion defoamer designed for the pulp and paper sector. Boasting optimized thermal-mechanical properties, it lowers foam porosity by 40% at 0.005%-0.1% dosage while increasing fiber yield by 15%. Certified by ISO 9001 and REACH, this milky homogeneous liquid (1,000-3,500 mPa·s viscosity) performs stably at pH 1-14 and ≤150°C, enabling rapid bubble collapse in kraft and sulfite pulping processes.
Wide pH Compatibility: Functions effectively from pH 1 acid bleaching to pH 14 black liquor systems.
Fast Defoaming Action: Nano-silicone particles (D50≤5 μm) collapse bubbles within 20 seconds.
Strong Thermal Resistance: Retains over 95% activity after 24 hours at 150°C.
Eco-Friendly Compliance: Free of APEO and VOC, meeting GB 18582-2020 and OECD 301B standards.
Cost-Saving Performance: Reduces defoaming cost per ton of pulp by 18% through optimized dosage.
Pulp Digestion: Controls fiber loss in 160-170°C kraft cooking processes.
Paper Machine Whitewater: Improves sheet uniformity in 1,800 m/min forming sections.
Industrial Cleaners: Suppresses foam in pH 12 alkaline degreasers.
Effluent Treatment: Lowers sludge volume in high-COD wastewater (≥30,000 mg/L).
Mineral Oil Enhancement: Boosts the persistence of mineral oil-based defoamers.
Type | Silicone emulsion defoamer |
Appearance | Milky homogeneous liquid |
Active Content | Polydimethylsiloxane + hydrophobic silica (18-22%) |
Dynamic Viscosity | 1,000-3,500 mPa·s |
pH Range | 1-14 |
Surface Tension | 21.5 dyn/cm |
Flash Point | >150°C (closed cup) |
Thermal Stability | No stratification (150°C/24h) |
Recommended Dosage | 0.005%-0.1% (by total weight) |
Shelf Life | 360 days (sealed, 5-35°C) |
Packaging | 200kg/IBC tote or 20kg/PE drum |
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E-mail: wangxingqiang@ericwchem.com
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