Under the general environment promulgated by the National Energy Conservation Law, building energy consumption, as the main part of social energy consumption, is the first to be attacked by all walks of life. As an important part of building energy saving, heat insulation strips play an extremely important role in energy saving of doors, windows and curtain walls.

First of all, the raw materials of heat insulation strips are recognized internationally, 75% polyamide 66 (PA66) plus 25% glass fiber (GF), that is, PA66+GF25 is the main material of heat insulation strips. This is because PA66 is excellent Heat resistance and physical properties, and the addition of 25% GF makes it a qualitative leap in mechanical strength.

The heat insulation strip made of nylon 66 with 25% glass fiber has a thermal deformation temperature of more than 230 degrees, which can fully meet the process requirements of first wearing the strip and then spraying; the thermal conductivity (thermal conductivity) is 0.3W/m *K is only about 1% of aluminum alloy; while other aluminum alloys have similar linear expansion coefficients, which can ensure that it can synchronize with aluminum alloys in the process of external temperature changes; excellent UV resistance and thermal aging properties can ensure its Long service life. Generally speaking, the heat insulation strip made of PA66+GF25 as the raw material meets the mechanical properties and processing characteristics of aluminum alloy profiles, can ensure the quality and life of the heat insulation profiles, and can ensure the safe use of doors, windows and curtain walls. Companies use recycled nylon to serve as pure nylon, and even use PVC, ABS and talcum powder to replace PA66+GF25. Such products not only fail to meet the requirements, but may also cause thermal insulation doors and windows to deform, detach, and The possibility of falling into the market will not only harm the interests of users, but also the safety of users cannot be guaranteed.

Secondly, the dimensional accuracy of the heat insulation strip also needs to be paid attention to, because as the main component of the heat insulation profile, it is compounded with two aluminum alloys. The heat insulation strip should be matched with the notch of the aluminum alloy, and then use the roller plate to roll the profile to complete the engagement. In this system engineering, in addition to ensuring the accuracy of the notch size of the aluminum alloy profile, it is also necessary to ensure that the heat insulation strip is Dimensional accuracy, because if the dimensional accuracy of the heat insulation strip is too small and the rolling is not in place, the shear force of the composite profile will be insufficient, which will cause safety hazards to the entire window. If the dimensional accuracy is too large, the rolling transition may affect the partition The hot strip caused structural fractures, resulting in the scrap of the entire profile. The dimensional accuracy of a good product can reach ±0.05mm, and the entire threading process is smoother, which not only ensures the efficiency of the profile factory to wear the strip, but also ensures the safety of the end user.

Third, regarding the hydrolysis resistance, UV resistance, and anti-aging properties of the heat insulation strip. The water absorption of the heat insulation strip is determined by its material itself, because PA66 is a hydrophilic resin material, and the performance of the heat insulation strip after water absorption will be reduced to a certain extent, so how to ensure the insulation after water absorption How safe is the hot strip during use? In addition, the long-term use of heat insulation strips also puts forward requirements for its anti-ultraviolet performance and anti-aging properties. These are also hard indicators for the product itself, and there can be no slight relaxation. It is related to the heat insulation doors and windows experiencing the external climate After the change, is the meshing degree of the heat insulation strip and the aluminum profile still tight? The performance of a good heat insulation strip can still reach the standard after undergoing various tests.