The development status and trend of energy-saving doors and windows in buildings in China

1. Overview

Architectural doors and windows have a long history in our country , the concept of windows began when humans had fixed residences. startAt first, the doors and windows were in the form of natural openings with grass covers, and then gradually developed into wooden doors or windows. Real wooden doors and windows can be traced back to the Shang and Zhou dynasties3000years ago. As an integral part of the splendid architectural civilization of ancient China, architectural doors and windows can be called a pearl in the treasure house of Chinese culture.

In modern times, with the advent of the industrialization era, new types of wooden windows, steel windows, aluminum windows, and plastic windows have also successivelyarrival has entered the door and window market, Earned their golden age. However, with the development of science and technology and the deepening of awareness of energy conservation and environmental protection, energy-saving doors and windows are quietly changing the development pattern of the doors and windows market.

Every time'sChanges, eliminating old products and launching new ones, have had a qualitative impact on people's lives. The upgrade of doors and windows is not only the needs of the market, but also reflects the upgrade of the entire door and window industry. With the development of society, the continuous advancement of science and technology, and the gradual improvement of building standards, doors and windows are increasingly beyond the scope of their own use value, reflecting the extension of the value of the building and reflecting the quality, taste and function of the building from one side.

2. The stages of development of doors and windows

2.1 苐一Stage: the transformation from wooden windows to steel windows

Since the concept of doors and windows was invented by humans, wood has occupied the mainstream of early door and window materials. Since wooden doors and windows have certain limitations in terms of corrosion resistance and decorative properties, doors and windows made of other materials have gradually appeared on the market.

1911In 2001, hollow steel doors and windows were introduced to China from the United Kingdom, mainly in the "concessions" of Shanghai, Guangzhou, Tianjin and other cities For use within font>". After the founding of New China, steel doors and windows have been widely used in industrial buildings and civil engineering. In the late 1970s, the country implemented"replacing wood with steel"Policies have greatly promoted the development of steel doors and windows. The 1980s was the heyday of traditional steel doors and windows. 1989The annual market share once reached 70%. Large-scale urban construction has won business opportunities for the development of steel windows, and wooden windows were quickly replaced by steel windows.

2.2 The second stage: the transformation from steel windows to aluminum windows

Aluminum alloy doors and windows in20 Century70<font face=" Song ��Other new technologies such as doors and windows are also being developed. Energy conservation and environmental protection have become the eternal theme for the future development of building doors and windows. Before, Bayer Company of Germany, Huntsman Company of the United States, and Jiangsu Shengyuan Composite Materials Company have successively launched new glass fiber reinforced polyurethane doors and windows. This door and window profile is a new composite material produced using glass fiber as the reinforcing material, polyurethane as the matrix resin, and using the pultrusion process. Compared with plastic steel windows, the overall performance of this profile has significant advantages in thermal insulation, heat insulation, strength, flame retardancy, etc., which has attracted much attention, but itsA big oneThe disadvantage is that the material cannot be recycled, which may limit its large-scale promotion and use.

Of course, aluminum alloy has the characteristics of low density, high strength, corrosion resistance, easy processing and recovery, and recyclability. Adopt new type of heat insulationAfter technologically solving the energy-saving problem of aluminum alloy, the glue injection typeThermal insulationProfile and strip typeThermal insulationProfiles have become mainstream and popular in architectureThermal insulationProfiles will surely occupy the mainstream market of energy-saving doors and windows for a long time in the foreseeable future, and their market position cannot be shaken in the foreseeable future. Energy saving and environmental protection areheat insulationThe development of the door, window and curtain wall industry has brought new technical challenges and market opportunities. In the chaotic market structure of the building doors and windows industry, broken bridge aluminumheat insulation Technology will lead to another change in the energy-saving door, window and curtain wall industry, and will lead the door, window and curtain wall market in the long term future development direction.