Ultra-Flexible Polyurethane Potting Compound For MBR Membrane Root Protection

BZ-6900-3 is a two-component polyurethane potting compound specifically designed for root protection of MBR (Membrane Bioreactor) membranes. With exceptional fluidity for easy penetration into membrane bundles, long-term flexibility retention, and compliance with RoHS and REACH regulations, it provides reliable protection against mechanical stress and chemical exposure across -40~100℃. This formula features low water absorption (≤0.5%) and excellent adhesion to membrane materials, ensuring the integrity of MBR systems in wastewater treatment applications.

Key Product Features

1. Outstanding fluidity: Low mixed viscosity (650±200 mPa·s at 25℃) for easy penetration into tight membrane root gaps
2. Long pot life: 30±5 minutes at 25℃, allowing sufficient time for complex potting operations
3. Ultra-flexible: Shore A 45±15 hardness with ≥50% elongation at break, absorbing membrane vibration and thermal expansion
4. Wide temperature tolerance: Stable performance from -40 to 100℃, suitable for fluctuating wastewater treatment environments
5. Dual compliance: Meets RoHS and REACH regulations for eco-friendly industrial use
6. Strong adhesion: Bonds tightly to MBR membrane materials, preventing root displacement and ensuring long-term system integrity
7. Rapid curing options: Full cure in 4.5±1 hours at room temperature; ≤60 minutes with 60℃ heating for accelerated production

Technical Parameters

Product Applications

1. MBR Membrane Root Protection: Encapsulates membrane roots in wastewater treatment systems, preventing mechanical damage and chemical corrosion
2. Membrane Module Sealing: Seals gaps between membrane bundles and module frames, ensuring efficient filtration and reducing maintenance costs
3. Wastewater Treatment Equipment: Protects sensitive components in bioreactor systems from harsh chemical exposure and temperature fluctuations
4. Industrial Filtration Membranes: Provides flexible encapsulation for microfiltration and ultrafiltration membranes in food processing and pharmaceutical industries

Directions for Use

1. Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
2. Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
3. Accurate Proportioning: Manual operation requires precise mixing according to the specified ratio and recording. Machine potting requires calibrated ratios and first-article confirmation is recommended.
4. Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
5. Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
6. Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
7. Curing: Allow the potted and inspected products to cure at room temperature or with heat assistance (recommended 60°C if needed), according to product and process requirements.
8. Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.

Packing & Shipping & Storage

1. Hardener: Typically 5KG/10KG/20KG/200KG metal or plastic drums.
2. Resin: Typically 10KG/20KG/200KG metal or plastic drums.
3. Store and transport as a general chemical product.
4. Store sealed, protected from light at room temperature. Shelf life varies from 6 to 12 months depending on packaging; please refer to the expiry date on the shipping package.
5. When temperature drops to 15°C or lower, the hardener or resin should be stored in a warm place or heated before use for potting. Specific heating recommendations depend on the temperature drop; please communicate and consult with us.