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NEWS

FRP profiles will become the "fifth generation" new materials for doors and windows.

PUBTIME:

2025-02-24 10:02:57

Glass fiber reinforced plastics (FRP fiber reinforced plastics) profiles are made of glass fiber and its products as reinforcing materials and unsaturated polyester resin as basic materials, which are produced by pultrusion process and assembled into doors and windows. According to the industry, FRP doors and windows are expected to take the lead in the new material era of the "fifth generation" doors and windows.

Glass fiber reinforced plastic doors and windows have the following excellent characteristics:

Lightweight and high strength: the density of FRP profile is about 1.7, which is 4-5 times lighter than steel, but its strength is great. Its tensile strength is 350-450 MPa, which is close to that of ordinary carbon steel, and its bending strength is 388MPa and bending elastic modulus is 20900MPa, so it is not necessary to use steel lining for reinforcement.

Energy saving and thermal insulation: The thermal conductivity of FRP profile is 0.39 W/m k, which is only 1/100 ~ 1/1000 of that of metal, so it is an excellent thermal insulation material. In addition, the FRP profile is hollow structure, and all the gaps are sealed with rubber strips and tops, so the heat insulation effect is remarkable. After testing, the heat transfer coefficient K0 of the glass fiber reinforced plastic casement window (single frame double glass window) is 2.2 W/(m2 k), which belongs to the national standard GB/T8484? Level 8 in the 2002 standard; The heat transfer coefficient K0 of the glass fiber reinforced plastic casement window (single frame and three glass windows) is 1.8W/(m2 k), which belongs to the national standard GB/T8484? Level 9 in the 2002 standard; The heat transfer coefficient K0 of glass fiber reinforced plastic casement window (single-frame three-glass window, low-emissivity glass) is 1.3W/(m2 k), which belongs to the national standard GB/T8484? Level 10 in 2002 standard. Is it a national standard GB/T8484? Level 10 in 2002 standard.

Good sealing performance: In the assembly process of FRP doors and windows, the corners are treated by gluing and screwing, at the same time, all gaps are sealed by rubber strip and wool tops, and the special profile structure makes the sealing performance good. Tested by National Construction Engineering Quality Supervision and Inspection Center, Beijing Construction Hardware Plumbing Product Quality Supervision and Inspection Station and Beijing Construction Engineering Quality Inspection Center, respectively, the air tightness reached the national standard GB/T7107? Level 5 in the 2002 standard; Does the water tightness meet the national standard GB/T7107? Level 3 in 2002 standard.

Health, environmental protection and remarkable energy-saving effects: the test results of FRP door and window profiles meet GB6566? The index requirements of building main materials in "Radionuclide Limit of Building Materials" in 2001, the test result is 0.2, the internal irradiation index is 0.2, and the external irradiation index is 0.2.

Good sound insulation effect: The sound insulation capacity RW of "Fangyun" brand FRP double-glass and triple-glass windows reached 36dB and 39dB respectively, and the sound insulation performance grade was Grade 4.

Corrosion resistance: FRP is an excellent corrosion-resistant material, which has good resistance to acid, alkali, salt and most organic substances, seawater and humidity, and also has resistance to the action of microorganisms. This characteristic is especially suitable for 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 that of steel and aluminum alloy and 1/15 of that of plastic. Therefore, the size stability of FRP doors and windows is good, and the change of temperature will not affect the normal opening and closing function of doors and windows.

Good temperature resistance: FRP is a thermosetting plastic. After resin crosslinking, it forms a three-dimensional network molecular structure and becomes insoluble and insoluble, which will not melt even when heated. The thermal deformation temperature of FRP profile is above 200℃, and it has good high temperature resistance. And the low temperature resistance is better.

Good insulation performance: FRP is a good insulation material, which 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 outdoor temporary buildings and buildings with communication systems.

Good shock absorption performance: the elastic modulus of FRP profile is 20900, and the doors and windows made of it have high shock absorption frequency. The combination of resin and fiber interface in FRP has shock absorption and seismic resistance, avoiding the early damage caused by resonance of structural members in working state.

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 the facade effect of buildings with different styles and grades.