Yanhe doors and windows industry development from

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Building doors and windows have a long history. The concept of windows has existed since human beings had fixed residences, and they are wooden windows, which have lasted for thousands of years

building doors and windows have a long history. The concept of windows has existed since human beings had fixed residences, and it is wooden windows, which has lasted for thousands of years. From mullion windows to lattice windows, support and pick windows, the function and shape of wooden windows have developed greatly. However, with the arrival of the industrial era, steel windows, aluminum windows, plastic windows, broken bridge aluminum windows, etc. have also successively dominated the door and window market and won their respective golden periods. However, with the deepening of the awareness of energy conservation and environmental protection, wooden windows are quietly changing the market pattern

▲ ancient wooden windows

▲ modern wooden windows

the first change: the change from wooden windows to steel windows

modern architectural doors and windows in China developed in the 20th century, and hollow steel windows were introduced into China in 1911. In the late 1970s, the state vigorously implemented the resource allocation policy of "replacing wood with steel", which greatly promoted the development of Vierendeel steel windows. It should be said that large-scale urban construction has won business opportunities for the development of hollow steel windows, and wooden windows have been quickly replaced by steel windows

▲ steel window

the second transformation: the transformation from steel window to aluminum window

the 1980s was the heyday of the traditional hollow steel window, with a market share of 70%. However, the fatal defect of steel windows is that steel conducts heat quickly, has poor thermal insulation performance, and is easy to rust, which is not beautiful, and there is little room for technical and technological transformation

therefore, aluminum windows began to enter the Chinese market, but initially they were only used in foreign embassies in China and a few foreign-related projects. Compared with hollow steel windows, aluminum windows are highly plastic, can be processed in many forms, and are not easy to rust. Therefore, aluminum doors and windows have been vigorously promoted, and the market space has been gradually expanded. The product series and varieties of aluminum doors and windows began to enrich, forming a relatively developed aluminum doors and windows product system and establishing its pillar product status

▲ aluminum alloy window

the third reform: the reform from aluminum window to plastic steel window

aluminum alloy has strong plasticity and reduced processing difficulty, but its heat conductivity is very high, and the sealing and heat preservation effect is not ideal. At the same time, aluminum alloy is also a high energy consumption material. In order to solve the problem of thermal insulation of doors and windows, China began to introduce the production technology of plastic steel doors and windows from Germany in 1983. Plastic steel doors and windows began in the late 1950s, first developed by Germany, a kind of hard, low foaming building plastic called UPVC, which can be used in construction. At that time, the technology was not very advanced, and both single cavity and two cavity structures were used. In 1991, a number of equipment, molds, profiles, assembly equipment and other manufacturers emerged in China; In 1996, the state vigorously advocated the production of plastic steel doors and windows, which ushered in the prosperity of the plastic steel doors and windows industry

▲ plastic steel window

has experienced three changes, and the door and window industry has a deeper understanding of aluminum alloy and plastic steel. In order to solve the problem of heat insulation, the bridge cutoff heat insulation aluminum alloy doors and windows were born. The principle is to use PA66 nylon to separate and closely connect the indoor and outdoor two layers of aluminum alloy into a whole, forming a new heat insulation aluminum profile. The revolutionary improvement of the thermal insulation performance of bridge breaking aluminum alloy has solved the fatal problem of aluminum alloy's fast conduction and heat dissipation, which does not meet the requirements of energy conservation, to a certain extent, so it began to be respected by the market

▲ broken bridge aluminum alloy window

change is imminent: the change from broken bridge aluminum window to wood window

has experienced four changes. Now the door and window market has a market pattern of plastic steel window, aluminum alloy window, broken bridge aluminum window, wood window and so on. But at the same time, we also see some phenomena. The low-level repeated production of plastic steel windows and aluminum alloy windows has led to their "stalling". Now we can also see the shadow of plastic steel windows and aluminum alloy windows in market markets and street shops. The price competition without bottom line is bound to bring low-quality plastic steel windows and aluminum alloy windows into a dead alley and eventually withdraw from the market

▲ Experience Hall of energy-saving doors and windows

with the deepening of awareness of energy conservation and environmental protection and the introduction of national energy conservation and environmental protection policies, people began to realize that energy conservation and environmental protection is the general trend. As the best choice for energy conservation and environmental protection, the advantages of wooden windows are obvious. First of all, wood is environmentally friendly, renewable, recyclable, and will not cause environmental pollution; Secondly, the heat conduction of wood is the weakest; Third, the plasticity of wood is very strong, and the decorative effect is excellent

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