Fast-Curing Polyurethane Potting Compound for Filtration Systems
BZ-6902-1 is a high-performance two-component polyurethane encapsulant engineered for rapid sealing and structural bonding of air, oil, and high-efficiency filters. It cures fully in 2.5±0.5 hours at 25℃ (or ≤15 minutes with 60℃ heat), delivering high elongation (≥50%) and strong electrical insulation (breakdown voltage ≥20 kV/mm). This RoHS-compliant formulation offers low moisture uptake (≤0.5%) and robust adhesion to metals, plastics, and filter media, ensuring lasting reliability in tough industrial settings from -40℃ to 100℃.
Key Product Features
- Fast Cure: Fully cures in 2.5±0.5 h at 25°C; accelerates to ≤15 min at 60°C for high-throughput production.
- Simple Metering: 1:2 mix ratio cuts errors and waste, compatible with automated dispensers.
- Resilient Flexibility: Shore A 65±8, elongation ≥50%, absorbs shock and accommodates thermal expansion.
- High Dielectric Strength: Breakdown voltage ≥20 kV/mm, volume resistivity >1.0×10¹¹ Ω·cm for reliable isolation.
- Versatile Adhesion: Forms durable, leak-tight bonds to metals, plastics, and various filter media.
- Eco-Conscious: Fully RoHS-compliant, meeting global environmental standards.
- Controllable Pot Life: 7±3 min at 25°C, adjustable for seasonal temperature variations.
Technical Parameters
|
Parameters
|
Hardener
BZ-6902-1R A
|
Resin
BZ-6902-1R B
|
|
Before curing
|
Appearance
|
Light yellow liquid
|
White liquid
|
|
Viscosity(mPa·s.25℃)
|
70±30
|
5500±1500
|
|
Initial mixed viscosity(mPa·s.25℃)
|
450±150
|
|
Density(g/cm³.25℃)
|
1.14±0.05
|
1.55±0.05
|
|
Mixing
&
Curing
|
Mix ratio(by weight)
|
A:B=1:2
|
|
Pot life 130±30g(min.25℃)
|
7±3 min
(Adjustable for summer/winter use)
|
|
Curing condition
|
Room temperature curing
|
|
Surface drying time 30g(min.25℃)
|
20-90min
(Adjustable for summer/winter use)
|
|
Curing time 30g(H.25℃)
|
2.5±0.5H
(Adjustable for summer/winter use)
|
|
Curing time(Heated)
|
60℃ heated ≤15min
|
|
After curing
|
Color
|
White
|
|
Hardness (Shore A)
|
65±5
|
|
Temperature resistance(℃)
|
-40~100℃
|
|
Water absorption(24H)
|
≤0.5%
|
|
Thermal conductivity(W/m.k)
|
≥0.3
|
|
Breakdown voltage(kV/mm)
|
≥20
|
|
Surface resistivity(Ω/sq)
|
＞1.0×1010
|
|
Volume resistivity(Ω.cm)
|
＞1.0×1011
|
|
Tensile strength(MPa)
|
≥1
|
|
Elongation at break(%)
|
≥50%
|
|
Dielectric constant(at 50Hz)
|
≥6
|
Product Applications
- Air Filters: Seals automotive cabin filters, industrial HVAC filters, and cleanroom air filters, preventing air leakage and enhancing filtration efficiency.
- Oil Filters: Bonds filter media to metal end caps in automotive and industrial oil filters, ensuring structural integrity under high-pressure conditions.
- High-Efficiency Filters: Encapsulates HEPA and ULPA filter frames, providing airtight seals and mechanical stability in critical environments like hospitals and data centers.
- Filter Control Electronics: Insulates sensor modules and control circuits in smart filter systems, protecting against dust, moisture, and electrical interference.
- Industrial Filtration Systems: Seals hydraulic filters, fuel filters, and water treatment filters, withstanding exposure to harsh chemicals and temperature fluctuations.
Directions for Use
- Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
- Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
- 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.
- Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
- Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
- Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
- 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.
- Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.
Packing
- Hardener: Typically 5KG/10KG/20KG/200KG metal or plastic drums.
- Resin: Typically 10KG/20KG/200KG metal or plastic drums.
