PU Foam For High-efficiency Automotive Air Filters
Introduction
POLYOL-A is blend polyol which is combined by hyperactive polyether
polyols, cross-linking agent, compound catalyst and so on.
ISO-B is modified isocyanate, and it is micro-pore elastomer which
adopts cold molding.
It has excellent mechanical and anti-fatigue properties. Also, with
short production cycle, high efficiency consumption. So it is
widely used for manufacturing cars, motorcycles and other air
filters.
Typical properties
| Property | Polyol-A | ISO-B |
| Appearance | Milky viscous liquid | Brown Liquid |
| Viscosity (25℃)/(mPa·s) | 600-1000 | 75-125 |
| Density (20℃)/(g/ml) | 1.00-1.10 | 1.10-1.20 |
| Storage Temperature (℃) | 15-25 | 15-25 |
| Shelf Life (months) | 6 | 6 |
The material should be protected from moisture contamination under
recommended temperature. ISO-B should fill nitrogen gas and then
seal it if you can’t use it up at one time.
Reactive properties
| Unit | By manual | By machine |
| Polyol-A/ISO-B | ratio | 100/(25-30) | 100/(25-30) |
| Cream time | s | 20-30 | 18-28 |
| Gel time | s | 50-60 | 45-55 |
| Mold Temperature | ℃ | 35-55 | 35-55 |
| Demolding time | min | 5-8 | 5-8 |
| FRD | Kg/m3 | 500-600 | 450-550 |
Physical properties
| Unit | Index |
| Hardness (shore A) | / | 30-50 |
| Density | Kg/m3 | 700-800 |
| Tensile strength | mPa | ≥0.5 |
| Elongation at break | % | ≥90 |
| Right-angled Tearing Strength | kN/m | ≥2.7 |
Storage and transportation
The product is packed in galvanized steel drums, with net weight
200kg. Please keep the product in a well ventilated, cool and dry
place, preventing direct exposure to sunlight and rain, and keep it
away from water or heat sources.
