Application of FRP profiles in doors and Windows

GFRP doors and Windows are light and strong, with tensile strength above 350 MPa, bending strength above 260 MPa, about 2 times of aluminum alloy and 4 times of plastic steel, making up for the weakness of plastic-steel doors and Windows that are easily deformed due to low strength. The bending elastic modulus of FRP profile is higher, rigidity is good, so FRP doors and Windows are suitable for larger size or higher wind pressure situation, and the dimension is stable, sound insulation performance is good. FRP profiles of the thermal deformation temperature is 200 ℃, the linear expansion coefficient is low, and buildings and glass, under the environment of the cold and hot temperature difference is bigger, not easy to produce cracks between buildings and glass, doors and Windows of good airtight performance, greatly improving the sealing performance of Windows and doors. Compare with the window of window of aluminium alloy door that USES on the market at present window of model steel door, the energy-saving effect of door of window of window of quality FRP/composite material is very good, inspect according to concerned branch, the heat preservation performance of window of FRP door is better than the first class index that sets in national standard.

In building energy saving design standard, the requirement door window material chooses the material with low thermal conductivity, glass reinforced plastic door window not only seal performance is good, and have better sunshade function and good heat preservation performance. The GFRP profile provides insulation to both thermal and solar radiation, so the GFRP window has good insulation performance. The FRP profile has good resistance to cold and high temperature, making FRP doors and Windows widely used in cold and high temperature areas. Due to the structural characteristics of resin and fibre inside the GFRP profile, it is microelastic and conducive to absorption of sound waves, so that GFRP window has good sound insulation performance. In buildings, doors and Windows, walls, roofing and ground are the four major parts of building energy consumption, among which doors and Windows are ranked first. 50% of the energy loss of building is lost through doors and Windows, especially the window wall of public building is up to 70%, which leads to greater energy loss. Therefore, the energy saving of doors and Windows plays a crucial role in the whole energy-saving building. Reducing the energy loss of doors and Windows is one of the main ways of building energy saving at present. It is of great significance to develop and use FRP/composite doors and Windows vigorously in the building structure.