China Aluminum Network has introduced insulated aluminum alloy doors and windows, a product that originated from abroad and has gained popularity in recent years. These systems are made using heat-insulating aluminum profiles, which are designed to reduce thermal conductivity and improve energy efficiency. There are two main types of heat-insulating aluminum profiles: the strip type and the plastic injection type. Currently, over 80% of the insulated aluminum doors and windows available in the market use the strip-type design, making it the dominant choice in the industry.
The strip-type insulation system works by splitting the traditional single-piece aluminum profile into two parts and then connecting them with low-conductivity thermal insulation strips through mechanical means. This method effectively reduces heat transfer through the aluminum frame, addressing one of the key issues in traditional aluminum window systems. This technology has been widely used in Europe for over three decades, where extensive experience has been gained in material selection, structural design, stress control, connection methods, and sealing techniques. As a result, a comprehensive set of technical standards has been developed. In response to these European practices, China has also established its own national technical standards for heat-insulating aluminum profiles.
Despite this progress, there are still many challenges in the production and application of aluminum doors and windows in China. Market feedback highlights several quality concerns, particularly regarding the insulation performance of the profiles. Substandard products have become a significant issue, leading to market confusion, frequent disputes, and compromised project quality. These problems not only harm consumer interests but also undermine the credibility of the entire industry. Therefore, ensuring the quality and reliability of insulated aluminum doors and windows remains a critical challenge for manufacturers and regulators alike.
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