characher
1. lgiht weight and wasy making. ecan and environmental protection
2. durable , non-toxic. heat preservation and sound insulation
3. reach fireproof standard of level A.
| ITEM | UNIT | SPECIFICATION |
| Density | kg/m3 | 55-70 |
| Aluminum thickness | mm | 0.08 |
| Steel thickness | mm | 0.2 |
| Total thickness | mm | 20 |
| Dimension | mm | 3000(4000)*1200*20(30) |
| Temperature range | centigrade | -150 --- 150 |
| Thermal conductivity | w/m. k | 0.018-0.024 |
| Firproofing performance | ~ | class 1 |
| Grade of smoke density | ~ | <9 sda |
| Water vapor transmission | g/(m2.24h) | < 1.9 |
| Compression strength | Mpa | 0.25 |
| Air leakage | % | < 1.2 |
| life time | years | 20-30 |
