Materials of Thermal Break Strips for Door and Window Aluminum Profiles

　　Materials of Thermal Break Strips for Door and Window Aluminum Profiles

　　Thermal break strips play a vital role in door and window aluminum profiles by reducing heat transfer and improving the energy - efficiency of buildings. There are several materials commonly used for thermal break strips, each with its own unique properties.

　　One of the most widely used materials is polyamide 6.6 (PA6.6) with glass fiber reinforcement. PA6.6 offers excellent mechanical properties, including high tensile strength and stiffness, which are essential for maintaining the structural integrity of the door and window frames. The addition of glass fiber further enhances its strength and dimensional stability, allowing it to withstand the mechanical stresses during the manufacturing process and in service. PA6.6 also has good thermal insulation properties, effectively reducing the heat flow between the interior and exterior surfaces of the aluminum profile. Its thermal conductivity is much lower than that of aluminum, creating a thermal barrier that helps to maintain a comfortable indoor temperature and reduce energy consumption for heating and cooling.

　　Another material used for thermal break strips is polyurethane (PU). PU has excellent thermal insulation characteristics and can be foamed to create a lightweight yet highly insulating structure. It also has good adhesion to aluminum, ensuring a reliable bond between the thermal break strip and the aluminum profile. PU thermal break strips can be customized in terms of density and thickness to meet different performance requirements. However, compared to PA6.6 with glass fiber, PU may have relatively lower mechanical strength, so it is often used in applications where the mechanical load is not extremely high.

　　In addition, some new composite materials are emerging in the market. These composite materials combine the advantages of different substances, such as high - strength polymers with special additives, to achieve better comprehensive performance in terms of thermal insulation, mechanical strength, and durability. The selection of thermal break strip materials depends on various factors, including the design requirements of the door and window, the local climate conditions, and cost - effectiveness.

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