With the improvement of the economic level of the Chinese people, people's requirements for windows have become higher and higher. The windows have a long history of thousands of years in our country. Along with the arrival of the industrialized era, steel windows, aluminum windows, plastic windows, broken bridge aluminum windows, and color steel windows have successively dominated the market of windows and doors and won their golden age. . The breakdown of every change, the elimination of old products, and the launch of new products all have a qualitative impact on people’s lives.
"The first change: wooden windows replaced by steel windows"
The doors and windows of modern buildings in China were developed in the 20th century. Fast-acting steel windows were introduced to China in 1911. In the late 1970s, the country vigorously implemented the resource allocation policy of “using steel to replace wood” to greatly promote the development of fasting steel windows. It should be said that large-scale urban construction has won business opportunities for the development of fast-moving steel windows. Wood windows have been quickly replaced by steel windows.
"The second change: aluminum window into the steel window"
The 1980s was the heyday of traditional fasting steel windows, and its market share once reached 70%. However, the fatal flaw of the steel window is the rapid conduction of steel to the heat, poor insulation properties, and easy to rust, unsightly, and there is little room for technological and technological transformation. Therefore, aluminum windows began to enter the Chinese market, but initially used only in foreign embassies in China and a few foreign-related projects. Compared with fasting steel windows, aluminum windows are highly malleable and can be processed in many forms and are not prone to rust. Therefore, aluminum doors and windows have been greatly promoted and the market space has been gradually expanded. The product series and varieties of aluminum doors and windows began to be enriched, forming a more developed aluminum door and window product system, establishing its position as a pillar product.
"The third change: steel doors and windows ushered in the boom period"
Aluminum alloy has strong plasticity and low processing difficulty, but its thermal conductivity is very high, and the sealing and heat preservation effect is not ideal. At the same time, aluminum alloys are also high-energy materials. In order to solve the problem of insulation of doors and windows, China began to import plastic steel doors and windows from Germany in 1983. Plastic-steel doors and windows began in the late 1950s and were first developed by Germany, a hard, low-foam building plastic called UPVC that can be used in construction. The technology at the time was not very advanced and both used single-cavity or two-cavity structures. In 1991, a number of manufacturers, such as equipment, molds, profiles, assembly equipment, etc., emerged in China; in 1996, the state strongly promoted the production of plastic steel doors and windows, thus ushering in the prosperity of the plastic steel doors and windows industry.
"The fourth change: broken aluminum windows against steel windows"
The advantages of plastic steel windows are low management and operating costs, price advantages, and corrosion resistance. After being introduced into the Chinese market, its core additives and formulas are still in the hands of foreign companies, and the prices are higher. With the ever-increasing competition in the domestic industry, some companies have begun to reduce or even eliminate various important additives in order to reduce costs. Profile thickness, development of sliding windows and other hardware low cost new products. This phenomenon of lowering standards and reducing allocation eventually evolved into an irreversible consequence of the entire industry. The shortcomings of plastic steel windows have been exposed and become a widespread phenomenon in the industry, such as yellowing, which will become brittle for a long time. And caused a number of security incidents.
"The fifth change: Aluminium wood window, pure wood window to market"
With the development of the times, the unitary nature of the broken bridge window has been far from satisfying people's demand for high quality doors and windows. Aluminium wood windows and pure wood windows have won high-end consumers' enthusiasm for more choices and better texture. However, due to the characteristics of wood, and the convergence of aluminum processing technology, the expansion coefficient is different, resulting in significant discounts. At the same time, with the intensification of competition, some companies use inferior quality wood in order to reduce costs, leading to uneven quality of the market, and eventually slow down the development of aluminum-wood windows and pure wood windows.