characteristic:
1. Low density, light weight
2. Excellent sound absorption effect
3. Good flame retardancy
4. Convenient processing and strong applicability
Application scope:
Used for sound absorption and noise reduction in car engine hood, roof, and other parts.
Typical physical properties of low-density PU:
|
Serial Number |
Test project |
Testing standards |
performance index |
|
1 |
density |
GMW 3182 |
15~50 kg/m3 |
|
2 |
mildew |
GMW 3259 |
No mold growth |
|
3 |
dimensional stability |
GMW 4217 |
The size change cannot exceed ± 2.5% |
|
4 |
heat resistance |
GMW 14196-2011 (336h, 150℃) |
The increase in material thickness cannot exceed 2% |
|
5 |
Flame retardancy |
GB 8410-2006 |
≤100mm/min |
|
6 |
Chemical resistance |
GMW15725 Part 3 of Table |
No obvious change of foam after test in reagent |
|
7 |
Sound absorption performance |
GMW14177 |
400Hz 0.43 500Hz 0.49 630Hz 0.55 800Hz 0.86 1000Hz 0.95 1250Hz 0.95 1600Hz 0.94 2000Hz 0.88 2500Hz 0.83 3150Hz 0.77 4000Hz 0.82 5000Hz 0.80 6300Hz 0.84 8000Hz 0.86 10000Hz 0.89 |
