Enjoy the hot water!
Polyurethane is used as thermal insulation layer of refrigerator and freezer for many years.
As a high performance insulation material, PU is renowned for itslight weight, high compressive
strength and mature industrialproduction technology.When foam technology continues to improve,
theinsulation layer is continuously reduced, which provides refrigeratoran even bigger inner space.
With a greener blowing agent, theproduct itself also becomes more environment friendly.
It saves water heater size, excellent in electrical insulation, heat resistance, cold resistance and solvent resistance.
Pouring method mainly.
The foam has excellent performance in flowability and adhesion.
Application
GB standard
GB/T 26709-2011 Rigid polyurethane foam for solar water heaters
Typical Performance
| Item | Unit | Performance index | |||
| Water System | Other blowing agent | ||||
| Thermal conductivity | 7days | ≤ | W/(m·K) | 0.026 | 0.023 |
| 28days | ≤ | W/(m·K) | 0.030 | 0.028 | |
| Compressive strength or deformation 10% compressive stress | ≥ | kPs | 150 | 130 | |
| Dximensional stability | （100±3）℃，48h | ≤ | % | 1.5 | |
| —（30±3）℃，24h | ≤ | % | 1.0 | ||
| Apparent core density | kg/m³ | 32~45 | 30~40 | ||
| Closed cell rate (volume fraction) | ≥ | % | 90 | ||
| Water absorption (volume fraction) | ≤ | % | 5.0 | ||
| Water vapor transmission coefficient（38℃/Rh 0~88%） | ≤ | ng/(Pa·m·s) | Agreed by both parties | ||
*GB/T 26709-2011 Rigid polyurethane foam for solar water heaters