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Fiberglass profiles will become the "fifth generation" new material for doors and windows

Release time：

2025-06-16 11:06:14

Fiberglass reinforced plastic (FRP) profiles are made of glass fibers and their products as reinforcing materials, unsaturated polyester resin as the base material, and produced through extrusion technology. The profiles are assembled into doors and windows.

Fiberglass reinforced plastic (FRP) profiles are made of glass fibers and their products as reinforcing materials, unsaturated polyester resin as the base material, and produced through extrusion technology. The profiles are assembled into doors and windows. The industry indicates that fiberglass doors and windows are expected to lead the new material era of the "fifth generation" doors and windows. Fiberglass doors and windows have the following excellent characteristics: lightweight and high strength: The density of fiberglass profiles is around 1.7, which is 4-5 times lighter than steel, but has great strength. Its tensile strength is 350-450MPa, which is close to ordinary carbon steel. Its bending strength is 388MPa and bending elastic modulus is 20900MPa.


Fiberglass reinforced plastic (FRP) profiles are made of glass fibers and their products as reinforcing materials, unsaturated polyester resin as the base material, and produced through extrusion technology. The profiles are then assembled into doors and windows. The industry indicates that fiberglass doors and windows are expected to lead the new material era of the "fifth generation" doors and windows.


Fiberglass doors and windows have the following excellent characteristics:


Lightweight and High Strength: The density of fiberglass profiles is around 1.7, which is 4-5 times lighter than steel, but has great strength. Its tensile strength is 350-450MPa, which is close to ordinary carbon steel. Its bending strength is 388MPa and bending elastic modulus is 20900MPa, so it does not require steel lining reinforcement.


Energy saving insulation: The thermal conductivity of fiberglass profiles is 0.39W/m · k, which is only 1/100 to 1/1000 of that of metals, making it an excellent insulation material. In addition, the fiberglass profile is a hollow structure, and all gaps are sealed with rubber strips and wool strips, so the thermal insulation effect is significant. After testing, the heat transfer coefficient K0 of fiberglass casement windows (single frame double glass windows) is 2.2W/(m2 · K), which meets the national standard GB/T8484? Level 8 in the 2002 standard; The heat transfer coefficient K0 of fiberglass casement windows (single frame 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 fiberglass casement windows (single frame three glass windows, low emissivity glass) is 1.3W/(m2 · K), which belongs to the national standard GB/T8484? Level 10 in the 2002 standard.


Excellent sealing performance: During the assembly process of fiberglass doors and windows, the corner treatment adopts adhesive and screw connection technology, and all gaps are sealed with rubber strips and wool strips. In addition, the special profile structure ensures good sealing performance. After testing by the National Construction Engineering Quality Supervision and Inspection Center, Beijing Construction Hardware and Plumbing Product Quality Supervision and Inspection Station, and Beijing Construction Engineering Quality Testing Center, the airtightness meets the national standard GB/T7107? Level 5 in the 2002 standard; Does the water tightness performance meet the national standard GB/T7107? Level 3 in the 2002 standard.


Health, green environmental protection, and significant energy-saving effects: The fiberglass door and window profiles have been tested and found to comply with GB6566? The index requirements for building main materials in the 2001 "Limits of Radionuclides in Building Materials" include a test result of 0.2, an internal exposure index of 0.2, and an external exposure index of 0.2.


Good sound insulation effect: According to the testing of the National Construction Quality Supervision and Inspection Center, the "Fangyun" brand fiberglass double glass and three glass windows have air sound meter weight sound insulation RW of 36dB and 39dB respectively, and the sound insulation performance level is level 4.


Corrosion resistance: Fiberglass is an excellent corrosion-resistant material that has good resistance to acids, alkalis, salts, and most organic compounds, seawater, and humidity. It also has resistance to the effects of microorganisms. This characteristic is particularly suitable for use in rainy, humid, and coastal areas, as well as places with corrosive media.


Good dimensional stability: The linear expansion coefficient of fiberglass profiles is 7.3 × 10-6/℃, lower than that of steel and aluminum alloys, and 1/15 of that of plastics. Therefore, fiberglass doors and windows have good dimensional stability, and temperature changes will not affect the normal opening and closing function of doors and windows.


Good temperature resistance: Fiberglass is a thermosetting plastic, and after resin cross-linking, it forms a three-dimensional network molecular structure, which becomes insoluble and does not melt even when heated. The thermal deformation temperature of fiberglass profiles is above 200 ℃, and they have good high temperature resistance. And its low temperature resistance is better.


Good insulation performance: Fiberglass is a good insulation material that is not affected by electromagnetic waves, does not reflect radio waves, has good microwave permeability, and can withstand high voltages without damage. Therefore, fiberglass doors and windows have special uses for temporary outdoor buildings and communication system buildings.


Good shock absorption performance: The elastic modulus of fiberglass profiles is 20900, and doors and windows made with it have a high shock absorption frequency. The combination of resin and fiber interface in fiberglass has shock absorption and seismic resistance, avoiding early damage caused by resonance of structural components in working conditions.


Colorful: Fiberglass profiles have high hardness and can be coated with various paints to create doors and windows of different colors, adapting to the exterior facade effects of buildings of different styles and grades.