Environmentally friendly, solvent-free two-component polyurethane (PU) adhesive formulated with a strict 100:25 weight ratio (A:B). Engineered to form durable elastomeric filter end caps, eliminating the need for traditional metal caps and rubber gaskets. Perfectly compatible with automated dispensing systems—for high-efficiency potting and casting, pair it with our Filter Gluing & Dispensing Machines.
This professional PU Adhesive 100:25 is an environmentally friendly, solvent-free, two-component polyurethane adhesive system specifically formulated for the production of industrial and automotive air filters.
Component A consists of a specialized polyether mixture, while Component B is a high-grade isocyanate. When mixed at the precise A:B = 100:25 weight ratio, the compound cures into a tough, high-performance elastomer that acts directly as the filter element’s integrated end cover. This advanced chemical bonding process eliminates the need for traditional iron end caps and rubber seals, drastically reducing your manufacturing costs while providing superior sealing integrity.
Technical Specifications
The performance indicators and pre-curing parameters of PU Adhesive 100:25 are detailed below:
Parameters Before Curing
Component A (Polyether Mixture)
Component B (Isocyanate)
Appearance
Red or black viscous liquid
Brown liquid
Viscosity (mPa.s)
800 ± 50
200 ± 50
Relative Density (g/cm³)
970 ± 10
1150 ± 20
Mixing Weight Ratio
100
25
Key Features & Performance Advantages
1. Cost-Saving Integrated End Cap Molding
By casting this liquid polyurethane elastomer directly into a mold, it cures to form the air filter’s end cover. This completely eliminates the requirement for metal covers and separate rubber sealing gaskets, lowering material costs and simplifying the production assembly line.
2. High Durability & Superior Sealing
Once cured, the elastomer exhibits exceptional mechanical strength, tear resistance, and durable elasticity. It provides a hermetic seal against dust, bypass air, and moisture, making it the most ideal material for producing plate-type air filter elements.
3. Low Mixed Viscosity & Easy Operation
Component A (800 ± 50 mPa.s) and Component B (200 ± 50 mPa.s) feature highly optimized viscosities. This low viscosity ensures smooth fluid transfer in automated machinery, preventing pump blockages and ensuring a thorough bubble-free mix.
4. Eco-Friendly & Solvent-Free Formula
The chemical formulation is completely solvent-free, releasing zero volatile organic compounds (VOCs) during the dispensing and curing processes, ensuring a safe and compliant working environment for your factory staff.
Applications & Industrial Uses
This two-component polyurethane adhesive is widely used in casting filter end caps for:
Commercial Vehicles & Trucks: Heavy-duty pleated air intake filters.
Passenger Cars: Standard cabin air filters and panel engine air filters (including Elion Group standard requirements).
Construction Machinery: High-dust environment loader and excavator air filters.
Lawn Mowers & Small Engines: Compact pleated panel filter elements.
Why Partner with Fupei?
Strict Batch Consistency: Every batch of Component A and B is tested in our quality control lab for viscosity, density, and curing speed, ensuring seamless machine operation without nozzle clogging.
One-Stop Equipment & Material Solution: We manufacture both the raw materials and the automated dispensing systems. We can customize the curing speed of our PU adhesive to perfectly match the speed of your automated Filter Gluing & Dispensing Machines.
Reliable Global Supply & Packaging: We offer flexible packaging (such as 25kg drums, 200kg barrels, or IBC totes) to suit your workshop’s storage and production scale, with secure global shipping and SDS certificates.
Frequently Asked Questions
A: This two-component polyurethane adhesive cures into a tough elastomer that acts directly as the filter’s integrated end cover. This completely eliminates the need for expensive iron caps and rubber seals, saving raw material costs and simplifying the manufacturing process.
A: Yes, absolutely. PU Adhesive 100:25 is specifically formulated with a low mixed viscosity (Component A: 800 ± 50 mPa.s; Component B: 200 ± 50 mPa.s), making it ideal for smooth feeding, precise mixing, and casting through our automated Filter Gluing & Dispensing Machines.
A: The precise weight ratio of Component A (polyether mixture) and Component B (isocyanate) is A:B = 100:25. It is critical to maintain this exact ratio during automatic or manual mixing to ensure optimal curing speed and elastomer physical properties.
