Environmentally friendly, solvent-free two-component polyurethane (PU) adhesive formulated with a precise 100:30 weight ratio (A:B). Specifically engineered to mold robust elastomeric filter end covers, eliminating the need for traditional metal caps and gaskets. Highly compatible with automated dispensing systems—for high-efficiency casting, pair it with our Filter Gluing & Dispensing Machines.
This industrial-grade PU Adhesive 100:30 is an environmentally friendly, solvent-free, two-component polyurethane adhesive system specifically developed for casting integrated end caps of automotive and heavy-duty air filters.
Component A is composed of a high-performance polyether mixture, and Component B consists of a premium isocyanate. When mixed at the precise weight ratio of A:B = 100:30, the liquid compound cures into a tough, durable elastomer. This elastomer serves directly as the filter element’s end cover, completely eliminating the need for separate iron caps and rubber gaskets. It is the most ideal product for manufacturing high-quality, cost-effective plate-type air filter elements with superior hermetic sealing performance.
Technical Specifications
The performance indicators and pre-curing parameters of PU Adhesive 100:30 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
30
Key Features & Performance Advantages
1. Cost-Efficient Integrated Cap Molding
This polyurethane system cures directly in the mold to form the filter element’s end cap. By eliminating traditional iron covers and rubber sealing gaskets, it drastically cuts material procurement costs and simplifies your factory floor assembly process.
2. High Mechanical Strength & Durability
Once cured, the resulting polyurethane elastomer exhibits outstanding tear resistance, structural elasticity, and anti-aging properties. It forms an airtight seal that stands up to rugged engine vibrations, ensuring zero bypass air in high-demand filtration environments.
3. Excellent Low-Viscosity Processing
The optimized viscosity of Component A (800 ± 50 mPa.s) and Component B (200 ± 50 mPa.s) allows for effortless fluid transfer in automated machinery. It ensures easy degassing, precise mixing, and smooth pouring without clogging the dispensing nozzles.
4. Zero Volatile Organic Compounds (VOC)
Formulated as a completely solvent-free system, this eco-friendly PU adhesive cures stably at room temperature without emitting harmful solvent vapors, promoting a safe and compliant working environment for your operators.
Applications & Industrial Uses
This two-component polyurethane system is widely used to cast integrated end covers for:
Heavy-Duty Trucks & Commercial Vehicles: Large cylindrical and panel air intake filter elements.
Passenger Cars: Precision automotive engine air filters and cabin HVAC filters.
Agricultural Machinery & Tractors: Robust pleated air intake filters for high-dust harvesting environments.
Industrial Dust Collection Systems: Pleated cartridge filters for workshops and cleanrooms.
Why Partner with Fupei?
Strict Quality Control & Batch Consistency: We test every single batch for density, viscosity, and curing speed, guaranteeing that our raw materials run smoothly through automated dispensing lines.
Perfect Material-Machinery Sync: Because we manufacture both the raw materials and the production machinery, we can fine-tune the curing speed of our PU adhesive to synchronize perfectly with the operating speed of our Filter Gluing & Dispensing Machines.
Flexible Industrial Packaging: We supply our adhesive in customizable packaging, including 25kg drums, 200kg steel barrels, or IBC totes, complete with secure global logistics support and standard SDS documentation.
Frequently Asked Questions
A: The primary difference lies in the mixing ratio of Component B (isocyanate). The 100:30 formulation utilizes a slightly higher ratio of isocyanate to polyether, which modifies the gel time, curing speed, and the final physical hardness of the cured elastomer. Both are excellent for molding integrated filter end covers.
A: Bubble formation can be prevented by ensuring a thorough mix of the two components under low-shear conditions. Additionally, using automated Filter Gluing & Dispensing Machines with built-in vacuum degassing and continuous mixing heads guarantees a clean, bubble-free cast every time.
A: When stored in original, unopened airtight containers at room temperature (15°C to 30°C) in a dry place away from direct sunlight, the shelf life of both Component A and Component B is 6 months. Component B (isocyanate) is sensitive to moisture and must be tightly sealed after opening to prevent crystallization.
