Rapid-Cure PU Potting Resin for Industrial Filtration Applications 6902-1

BZ-6902-1 is a two-component polyurethane encapsulant formulated for fast sealing and structural bonding of air, oil, and high-efficiency filters. It achieves full cure in 2.5±0.5 hours at 25°C (or ≤15 minutes at 60°C), with elongation ≥50% and dielectric strength ≥20 kV/mm. RoHS-compliant, it exhibits low moisture absorption (≤0.5%) and strong adhesion to metals, plastics, and filter media, ensuring dependable service in harsh industrial environments from –40°C to 100°C.

Key Product Features

1.Accelerated Curing: Full cure in 2.5±0.5 h at 25°C; reduces to ≤15 min with heat assist (60°C) for high-efficiency lines.
2.Simplified Dispensing: 1:2 mix ratio minimizes metering deviation and material waste, compatible with automated systems.
3.Elastic Toughness: Shore A 65±8, elongation ≥50%, buffers mechanical stress and accommodates thermal movement.
4.High-Voltage Isolation: Breakdown voltage ≥20 kV/mm, volume resistivity >1.0×10¹¹ Ω·cm for secure electrical separation.
5.Broad-Substrate Bonding: Delivers durable, leak-proof attachment to metals, plastics, and diverse filter substrates.
6.Environmentally Aligned: Fully RoHS-compliant, satisfying international regulatory requirements.
7.Adjustable Working Time: Pot life 7±3 min at 25°C, tunable to suit seasonal shop-floor conditions.

Technical Parameters 

Product Applications

1. Air Filters: Seals automotive cabin filters, industrial HVAC filters, and cleanroom air filters, preventing air leakage and enhancing filtration efficiency.
2. Oil Filters: Bonds filter media to metal end caps in automotive and industrial oil filters, ensuring structural integrity under high-pressure conditions.
3. High-Efficiency Filters: Encapsulates HEPA and ULPA filter frames, providing airtight seals and mechanical stability in critical environments like hospitals and data centers.
4. Filter Control Electronics: Insulates sensor modules and control circuits in smart filter systems, protecting against dust, moisture, and electrical interference.
5. Industrial Filtration Systems: Seals hydraulic filters, fuel filters, and water treatment filters, withstanding exposure to harsh chemicals and temperature fluctuations.

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

1. Hardener: Typically 5KG/10KG/20KG/200KG metal or plastic drums.
2. Resin: Typically 10KG/20KG/200KG metal or plastic drums.