Glass fiber reinforced plastic (FRP fiber reinforced plastic) profiles are based on glass fiber and its products, and unsaturated polyester resin is used as the basic material. The profiles are produced through a pultrusion process and assembled into doors and windows. According to the industry, FRP doors and windows are expected to take the lead in the era of new materials for "fifth generation" doors and windows.
FRP doors and windows have the following excellent characteristics:
Lightweight and high-strength: The density of FRP profiles is about 1.7, which is 4~5 times lighter than steel, but the strength is very large. Its tensile strength is 350-450MPa, which is close to ordinary carbon steel. The bending strength is 388MPa and the bending elastic modulus is 20900MPa. , So there is no need to use steel lining for reinforcement.
Energy-saving and heat preservation: The thermal conductivity of FRP profile is 0.39W/m·k, which is only 1/100~1/1000 of that of metal. It is an excellent thermal insulation material. In addition, the FRP profile has a hollow structure, and all the gaps are sealed with rubber strips and wool strips, so the heat insulation effect is remarkable.
Good sealing performance: In the assembly process of FRP doors and windows, the corner treatment adopts the glue and screw connection process. At the same time, all the gaps are sealed with rubber strips and wool strips. In addition, the special profile structure makes the sealing performance good.
Health, green environmental protection, and energy-saving effects are significant: the test results of FRP door and window profiles meet the index requirements of the main building materials in the GB6566 2001 "Limits for Radionuclides of Building Materials", the test result is 0.2, the internal exposure index is 0.2, and the external exposure index is 0.2.
Good sound insulation
Corrosion resistance: FRP is an excellent corrosion resistance material. It has good resistance to acid, alkali, salt and most organic matter, sea water and moisture, and it also has resistance to microorganisms. This feature is especially suitable for use in rainy, humid and coastal areas, as well as places with corrosive media.
Good dimensional stability: The linear expansion coefficient of FRP profile is 7.3×10-6/℃, which is lower than steel and aluminum alloy, and is 1/15 of plastic. Therefore, FRP doors and windows have good dimensional stability, and temperature changes will not affect the normal opening and closing functions of doors and windows.
Good temperature resistance: FRP is a thermosetting plastic. After the resin is cross-linked, it will form a three-dimensional network molecular structure and become an insoluble insoluble body, which will not melt even if heated. The heat distortion temperature of FRP profile is above 200℃, and it has good high temperature resistance. The low temperature resistance is better.
Good insulation performance: FRP is a good insulation material, it is not affected by electromagnetic waves, does not reflect radio waves, has good microwave permeability, and can withstand high voltage without damage. Therefore, FRP doors and windows have special uses for temporary buildings and communication system buildings in the field.
Good shock absorption performance: The elastic modulus of FRP profile is 20900, and doors and windows made of it have a higher shock absorption frequency. The combination of resin and fiber interface in FRP has shock absorption and shock resistance capabilities, which prevents structural parts from working. Early damage caused by lower resonance.
Rich colors: FRP profiles have high hardness and can be painted with various paints to make doors and windows of various colors to adapt to different styles and grades of building facade effects.