High-Rigidity Polyurethane Potting Compound for Filters
BZ-6906-K is a two-component polyurethane potting compound
engineered for structural bonding and sealing of high-efficiency
filters, air filters, and oil filters. With rapid room-temperature
curing (full cure in 2±1 hours), high Shore D hardness (68±8), and
excellent electrical insulation (breakdown voltage ≥20 kV/mm), it
provides robust mechanical stability and long-term durability
across -40~120℃. Compliant with RoHS regulations, this formula
features low water absorption (≤0.5%) and strong adhesion to metal,
plastic, and filter media, ensuring leak-proof performance in
demanding industrial environments. Key Product Features- Rapid curing: Full cure in 2±1 hours at 25℃; ≤45 minutes with 60℃ heating for
flexible production scheduling
- 1:2 mix ratio: Easy proportioning, minimal material waste, compatible with
automated dispensing systems
- High rigidity: Shore D 68±8 hardness with ≥35% elongation, ideal for structural
filter bonding applications
- Superior insulation: Breakdown voltage ≥20 kV/mm, volume resistivity >1.0×10¹¹ Ω·cm
for reliable electrical safety
- Wide temperature tolerance: Stable performance from -40 to 120℃, suitable for extreme
industrial conditions
- RoHS compliant: Meets international environmental standards for consumer and
industrial use
- Strong adhesion: Bonds tightly to metal, plastic, and filter media, preventing
leaks and ensuring long-term product longevity
Technical Parameters
Parameters | Hardener BZ-6906-K A | Resin BZ-6906-K B | Before curing | Appearance | Light yellow liquid | Beige liquid | Viscosity(mPa·s.25℃) | 250±100 | 18000±4000 | Initial mixed viscosity(mPa·s.25℃) | 5000±1500 | Density(g/cm³.25℃) | 1.21±0.05 | 1.72±0.05 | Mixing & Curing | Mix ratio(by weight) | A:B=1:2 | Pot life 130±30g(min.25℃) | 8±3min | Curing condition | Room temperature curing | Surface drying time 30g(min.25℃) | 45±10 min | Curing time 30g(H.25℃) | 2±1H | Curing time(Heated) | 60℃ heated ≤45min | After curing | Color | Beige | Hardness (Shore D) | 68±8 | Temperature resistance(℃) | -40~120℃ | 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(%) | ≥35% | Dielectric constant(at 50Hz) | ≥6 |
Product Applications - High-Efficiency Filters: Structural bonding of HEPA/ULPA filter frames and media,
providing airtight seals and mechanical stability in cleanrooms,
hospitals, and data centers
- Air Filters: Seals automotive cabin filters and industrial HVAC filters,
enhancing filtration efficiency by eliminating air bypass around
filter edges
- Oil Filters: Bonds filter media to metal end caps in automotive and industrial
oil filters, withstanding high-pressure fluid flow and vibration
- Industrial Filtration Systems: Seals hydraulic filters, fuel filters, and water treatment
filters, resisting chemical exposure and temperature fluctuations
- Filter Control Modules: Encapsulates sensor circuits and control electronics in smart
filter systems, protecting against dust, moisture, and electrical
interference
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 & Shipping & Storage- Hardener: Typically 5KG/10KG/20KG/200KG metal or plastic drums.
- Resin: Typically 10KG/20KG/200KG metal or plastic drums.
- Store and transport as a general chemical product.
- 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.
- 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.
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