Door and window industry needs to "stabilize" the advantages and disadvantages of aluminum-wood composite products
China's door and window market has experienced rapid growth over the past decade, with a wide variety of options now available. Among these, composite doors and windows, aluminum doors, and aluminum windows have become increasingly popular. However, the term "wood composite doors and windows" is currently the most dominant in the market. Other terms like "aluminum-wrapped wood," "wood-laminated aluminum," and "aluminum-wood composite" all refer to products that combine wood and aluminum, but despite their similar appearances, they differ significantly in internal structure and performance characteristics. The concept of aluminum-wood composite doors and windows originated in Europe and was later introduced to China. From this idea, "aluminum-wrapped wood" and "wood-clad aluminum" emerged in the domestic market. These products are widely used due to their maturity and well-established standards in Europe. Germany's Hannsock system was one of the first to bring the concept and standards of aluminum-wood composites to China, playing a key role in shaping the industry. Aluminum-wood composite doors and windows evolved from traditional wooden windows. They still use solid wood as the main structure, with an aluminum alloy profile added on the exterior side. The purpose of the aluminum is not only to protect the wood but also to enhance structural strength through a unique combination of materials. In Germany, the minimum standard for such products is IV68+, and with the introduction of new energy-saving regulations, the current standards have been raised to IV78+ and IV88+. The term "aluminum-clad wood" comes from the same concept, but it is more commonly used by Chinese manufacturers to describe similar products. Though visually similar, the two types differ in standards, product structure, and even in the deep processing of wood. Currently, there is no unified national standard for aluminum-clad wood doors and windows, leading to various versions such as the 56 series and 58 series. Most of them reference IV68+ as a technical basis, often reducing the thickness of the wood section to save material, which compromises performance and structural integrity. Another variation is "wood-laminated aluminum" doors and windows, which are based on aluminum alloy frames with wooden panels attached to the interior. While they look similar to "aluminum-wrapped wood," they are technically different, as they originate from aluminum windows rather than wooden ones. In this case, the wood serves mainly as a decorative element and does not contribute much to structural strength. In fact, it may even increase the load on the aluminum frame. If the wood is not properly processed, its inherent flaws may still be present. Due to the low technical barriers, many aluminum manufacturers have entered the market, producing products that mimic the appearance of "aluminum-wrapped wood." Some even engage in misleading marketing, confusing consumers and creating challenges in making informed choices. This has led to a surge in similar products, often driven by cost-cutting rather than quality. Industry experts point out that the confusion in the door and window market not only complicates consumer decisions but also creates issues of homogenization. To address this, accelerating the development of industry standards is crucial. Clearing up the chaos and setting proper regulations will help protect the industry and ensure fair competition in the market.
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