the development status and trend of energy-saving doors and wins in buildings in china
1. overview
architectural doors and wins have a long history in our country , the concept of wins began when humans had fixed residences. startat first, the doors and wins were in the form of natural openings with grass covers, and then gradually developed into wooden doors or wins. real wooden doors and wins 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 wins 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 wins, steel wins, aluminum wins, and plastic wins have also successivelyarrival has entered the door and win 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 wins are quietly changing the development pattern of the doors and wins 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 wins is not only the needs of the market, but also reflects the upgrade of the entire door and win industry. with the development of society, the continuous advancement of science and technology, and the gradual improvement of building standards, doors and wins 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 wins
2.1 苐一stage: the transformation from wooden wins to steel wins
since the concept of doors and wins was invented by humans, wood has occupied the mainstream of early door and win materials. since wooden doors and wins have certain limitations in terms of corrosion resistance and decorative properties, doors and wins made of other materials have gradually appeared on the market.
1911in 2001, hollow steel doors and wins 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 wins 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 wins. the 1980s was the heyday of traditional steel doors and wins. 1989the annual market share once reached 70%. large-scale urban construction has won business opportunities for the development of steel wins, and wooden wins were quickly replaced by steel wins.
2.2 the second stage: the transformation from steel wins to aluminum wins
aluminum alloy doors and wins in20 century70<font face=" song ��other new technologies such as doors and wins are also being developed. energy conservation and environmental protection have become the eternal theme for the future development of building doors and wins. before, bayer company of germany, company of the united states, and jiangsu shengyuan composite materials company have successively launched new glass fiber reinforced polyurethane doors and wins. this door and win 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 wins, 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 wins 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, win and curtain wall industry has brought new technical challenges and market opportunities. in the chaotic market structure of the building doors and wins industry, broken bridge aluminumheat insulation technology will lead to another change in the energy-saving door, win and curtain wall industry, and will lead the door, win and curtain wall market in the long term future development direction.
source of this article: http://www.wellgo.com.cn/newb/information_284.shtml
