With the enhancement of environmental protection and energy conservation requirements, many advanced energy-saving products and energy-saving technologies have gradually been applied to the construction industry in China. The issue of energy-saving insulation is very important for buildings, because it is related to thousands of households and is closely related to people's lives. Doors and windows occupy a vital position in the house's energy-saving system. At present, China's building energy consumption accounts for more than 27% of the total energy consumption of the whole society, and the energy consumption caused by glass doors and windows accounts for about 40% of the building energy consumption. Therefore, the heat-insulating aluminum profile insulation energy-saving window is a better choice.
As a key component of insulated aluminum alloy doors and windows and curtain walls, insulation strips have also created a new product field with the application of insulated aluminum alloy doors and windows and curtain walls.
What is the definition of insulation strip?
It consists of not less than 65% of polyamide 66 and 25%+2.5% of glass fiber, and it is a polyamide profile which has a heat transfer effect and a structural connection in the metal heat insulation profile.
The heat insulation strip is the core component of the strip insulation profile, which is the “broken bridge†in the heat transfer path of the aluminum profile, which reduces the transfer of heat in the aluminum profile part; and the structure of the aluminum profiles on both sides of the heat insulation profile The connecting piece, through which the three parts of the insulating profile are integrated, bears the load together. Unlike rubber strips, it is made of a new composite material by mechanical rolling. It cannot be replaced separately. Replacement can only be replaced with the entire profile.
In short, the heat-insulating aluminum alloy divides the original one-piece profile into two on the basis of the conventional aluminum alloy, and then connects the two separate parts together by mechanically combining the two heat-insulating strips. The nature of the use of the insulation strip determines that it must have both high strength and low conductivity. Otherwise, there will be a significant quality hazard in the insulated aluminum alloy doors and windows and curtain wall (insufficient strength will result in the insulation of the aluminum profile from the insulation strip. The joint breaks), or loses the meaning of heat insulation (high conductivity can not guarantee the insulation effect), so the material selection and manufacturing process of the insulation strip is very important.
The current insulation strip market is divided into three levels: one is imported nylon insulation strip (PA66GF); the other is domestic nylon insulation strip that began production in 2003; the third is domestic PVC insulation strip. Among them, the third-level PVC material insulation strip and aluminum alloy have large differences in linear expansion coefficient, and their strength is insufficient, and the aging resistance is poor, which makes the safety of their use cannot be guaranteed, so it has been eliminated by European doors and windows and curtain wall industry. . For the imported insulation bars of nylon + glass fiber (PA66GF) and domestic insulation bars, the difference and difference are also obvious.
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