Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

​DOW DOWSIL PulpAid 3379 Defoamer

DOW DOWSIL PulpAid 3379 Concentrate is a 100% active silicone defoamer made for the pulp and paper sector. Boasting optimized thermal-mechanical properties, it lowers pulp slurry viscosity by 40% at 0.01%-0.2% dosage, outperforming mineral oil-based alternatives. Certified by ISO 9001 and REACH, this milky homogeneous liquid (900-1,500 mPa·s viscosity) works stably at pH 1-14 and ≤150°C, enabling quick bubble collapse in high-pressure pulping processes.

Product Information of DOW DOWSIL PulpAid 3379 Defoamer

  1. Wide pH Resistance: Functions effectively in kraft pulping black liquor (pH 14) and acid bleaching systems.

  2. Self-Dispersing Ability: Nano silicone particles (D50≤5 μm) spread evenly without needing emulsifiers.

  3. Food-Grade Compliance: Meets FDA 21 CFR 176.170 standards for food-grade paper manufacturing.

  4. Cost-Saving Advantage: Cuts defoaming cost per ton of pulp by 25%, with 6-month dilution stability.

  5. Eco-Friendly Safety: Features over 90% biodegradability (per OECD 301B) and an APEO-free formula.

Areas of Application of DOW DOWSIL PulpAid 3379 Defoamer

  1. Pulp Digestion: Manages foam in 160-170°C kraft cooking, minimizing fiber loss.

  2. Paper Machine Whitewater: Eliminates bubbles in 1,800 m/min forming sections.

  3. Wastewater Treatment: Reduces sludge volume in high-COD effluent (≥20,000 mg/L).

  4. Recycled Paper Deinking: Boosts deinking efficiency by 15% in alkaline systems.

  5. Starch Coating: Removes defects in 90°C high-speed coating processes.

Specifications Of DOW DOWSIL PulpAid 3379 Defoamer

Type
Silicone defoamer
Appearance
Milky homogeneous liquid
Active Content
Polydimethylsiloxane + hydrophobic silica (100%)
Dynamic Viscosity
900-1,500 mPa·s
pH Range
1-14
Surface Tension
21.8 dyn/cm
Flash Point
>150°C (closed cup)
Thermal Stability
No stratification (150°C/24h)
Recommended Dosage
0.01%-0.2%
Shelf Life
540 days (sealed, 5-40°C)
Packaging
200kg/PE drum or 1-ton IBC tote


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