Environmentally friendly, solvent-free two-component polyurethane (PU) air filter adhesive formulated with a precise 8:1 weight ratio (A:B). Specifically engineered for high-strength bonding between filter paper media and metal end caps in automotive and tractor filters. Delivers low mixed viscosity and easy room-temperature operation—perfectly dispensed using our Filter Gluing & Dispensing Machines.
This professional Air Filter Adhesive 8:1 is an environmentally friendly, solvent-free, two-component polyurethane (PU) adhesive system designed specifically for the high-strength bonding of paper filtration media to metal end caps in automotive, tractor, and agricultural machinery filters.
Component A is formulated with premium polyether polyols containing active hydroxyl groups and specialized functional reinforcing agents, while Component B consists of highly reactive isocyanate prepolymers. When mixed at the standard weight ratio of A:B = 8:1, the compound exhibits exceptionally low mixed viscosity, allowing for effortless room-temperature application. It cures to form a highly durable, vibration-resistant bond that prevents filter bypass leaks under heavy engine suction.
Technical Specifications
The factual mechanical parameters, material properties, and operational configurations of our Air Filter Adhesive 8:1 are detailed below:
Technical Parameters
Factual Specifications
Material Composition
Two-component Solvent-free Polyurethane (PU)
Component A (Polyol)
Formulated with hydroxyl groups & functional reinforcing agents
Component B (Isocyanate)
High-purity isocyanate prepolymers
Mixing Weight Ratio
A:B = 8:1
Curing Temperature
Room Temperature (Fast curing without external heat)
Mixed Viscosity
Low mixed viscosity for easy pouring and dispensing
Adhesive Strength
Ultra-high mechanical bonding strength on metal and paper
Eco-Compliance
100% Solvent-free, Low-odor, Eco-friendly
Key Features & Performance Advantages
1. High-Strength Cross-Material Bonding
Engineered specifically to bond porous cellulose filter paper directly to non-porous galvanized steel, tinplate, or aluminum metal end caps. It creates a robust, leak-proof seal that resists oil, fuel, and intense engine heat, preventing filter bypass under high pressure.
2. Easy Room-Temperature Operation
This adhesive system completely eliminates the need for expensive, energy-consuming curing ovens. It achieves a rapid initial set and cures fully at standard room temperatures (around 25°C), simplifying your factory workflow and reducing overall power consumption.
3. Low Mixed Viscosity & Self-Leveling
The optimized low viscosity of the mixed compound allows it to flow smoothly, self-level evenly inside the metal end cap mold, and completely wet the paper edges. This ensures thorough penetration without leaving micro-gaps, dry spots, or air bubbles.
4. Solvent-Free & Environmentally Friendly
Contains absolutely no volatile organic solvents, ensuring zero toxic emissions (VOCs) during dispensing, curing, and long-term filter operation in vehicle cabins. It provides a safe workplace environment for your operators.
Target Applications
This specialized 8:1 polyurethane adhesive is widely used for end cap bonding in:
Automotive Engine Filters: Bonding pleated cellulose paper elements to steel end covers in passenger cars and commercial vehicles.
Tractor & Agricultural Machinery Filters: High-vibration resistant bonding for heavy-duty tractor air filters and field harvesters.
Industrial Air Intake Filters: Core end cap sealing for air compressors and power generation intake systems.
Why Partner with Fupei?
Machinery-Optimized Material Matching: As both a machinery and raw material manufacturer, we test and calibrate our Air Filter Adhesive 8:1 directly on our own Filter Gluing & Dispensing Machines to guarantee smooth fluid delivery and zero nozzle dripping.
Tested and Certified 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.
Secure 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: The 8:1 weight ratio of Component A to Component B is chemically optimized to ensure complete polymerization. Deviation from this ratio (either too much or too little isocyanate) will result in incomplete curing, leaving the adhesive permanently soft or brittle, which weakens the bond between the filter paper and the metal cap.
A: No. Our Air Filter Adhesive 8:1 is designed for convenient room-temperature curing. It cures stably and quickly under standard factory floor conditions (around 25°C). While external heating is not required, mild heating can be used to accelerate the initial gel time in cold winter environments.
A: Yes, absolutely. With its low mixed viscosity and excellent self-leveling properties, this adhesive is perfectly compatible with automated 2-part dosing systems. For high-volume automated filter production, we highly recommend using our specialized Filter Gluing & Dispensing Machines for precise volumetric control.
