1. Light weight and high strength
The density of FRP profile is about 1.7, which is 4~5 times lighter than steel, but its strength is very high. Its tensile strength is 350~450MPa, which is close to that of ordinary carbon steel. The bending strength is 388MPa, and the bending modulus of elasticity is 20900MPa. Therefore, it does not need to be reinforced with steel lining. After testing, the wind pressure resistance of FRP window can reach 5.3Kpa, which exceeds the level 8 in the international GB/T7106-2002 standard.
2. Energy saving and thermal insulation
The thermal conductivity of FRP profile is 0.39W/m · k, which is only 1/100~1/1000 of metal. It is an excellent thermal insulation material. In addition, the FRP profile is an open web structure, and all gaps are sealed with rubber strips and wool strips, so the thermal insulation effect is significant. According to the test, the heat transfer coefficient of glass fiber reinforced plastic casement window (single frame double glass window) K0=2.2W/(m2 · K), which belongs to Grade 8 level in the national standard GB/T8484-2002; The heat transfer coefficient of glass fiber reinforced plastic casement window (single frame three glass window) K0=1.8W/(m2 · K), which belongs to level 9 in the national standard GB/T8484-2002; The heat transfer coefficient of glass fiber reinforced plastic casement window (single frame three glass window, low radiation glass) K0=1.3 W/(m2 · K), which belongs to the level 10 in the national standard GB/T8484-2002.
3. Good sealing performance