The mixing properties of heat insulation strip matrix and reinforcement. There are four main reasons in Europe: the composite strength (120N / mm) is enough to ensure the bearing capacity of the heat insulation strip in the whole window; the accuracy of the overall dimension (0.1mm) can guarantee the whole window Assembly accuracy (0.2 ~ 0.3mm), thermal expansion coefficient similar to aluminum profile (2.35 * 10-5k-1), good weather resistance, fully ensuring the use requirements within the normal limit temperature range (- 30 ℃ - 80 ℃).
If the two main materials have replacement or ratio deviation (and some key auxiliary materials are not described), then the above four basic conditions cannot be guaranteed. In other words, the life and performance of the whole window can not be guaranteed.
The owners of thermal insulation aluminum doors and windows have been used in many urban engineering projects in northern China. With the gradual in-depth understanding of the structural characteristics of thermal insulation aluminum doors and windows and the decisive role of heat insulation strips for the whole window, their mood is becoming more and more complex. On the one hand, I feel that the future project of thermal insulation aluminum doors and windows is ready and the concept is clear; on the other hand, I am also worried about the fate of the thermal insulation aluminum doors and windows that have been put on the wall.
Xie Jiajin, director of the housing and real estate department of the Ministry of construction, once said: "we should be responsible to the people and the country, constantly explore new ways and methods to improve the quality of housing, constantly improve the scientific and technological content of housing, and lead the future of housing with science and technology." This is undoubtedly to remind the vast number of construction workers should always be cautious attitude towards every detail of the building.