How can buildings made of the hottest and lowest s

2022-08-16
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How can buildings made of low-strength glass gain new life

1 on the one hand, it has become the quantitative evaluation target of plastic film opening together with film anti adhesion function. Since its invention, glass architecture has been plagued by several problems. First of all, the quality of glass is unreliable and the strength is not high enough. Moreover, sharp fragments will be produced after the glass is broken, which is easy to cause injury; The second is the greenhouse effect of glass, which will retain the infrared energy emitted. It is very muggy in summer and is not suitable for living. Finally, when the indoor and outdoor temperature difference is large, the glass surface is easy to condense water vapor, which affects the transparency

these problems have not been solved for a long time. Only in recent decades have there been better solutions. One is "tempering". The impact strength of tempered (heat-treated) glass is 3 ~ 5 times higher than that of ordinary glass, and even if it is broken, it is only broken into small glass blocks without acute angles. The second is "hollow". The curtain wall glass is made into double layers (or even three layers), and the dry air layer or inert gas layer is filled between the two pieces of glass, which can greatly improve the heat preservation, heat insulation and sound insulation performance. According to the measurement, when the outdoor temperature is -10 ℃, the temperature in front of the single-layer glass window is -2 ℃, while the indoor temperature using three-layer insulating glass is 13 ℃. It should be emphasized that the air filled into the insulating glass must be dry, which is to prevent water vapor from condensing in the inner layer in winter and affecting the transparency. The third is "double silver". The glass is coated with two extremely thin silver films. This "double silver glass" can well transmit visible light, but can reflect the thermal radiation (infrared) of the sun. In hot summer, double-layer double silver insulating glass can pass through 90% of visible light and block 90% of solar radiation heat

the improved glass curtain wall has a new look and is very popular, "with unlimited scenery inside and outside". From the outside, the high-rise buildings seem to be wearing beautiful glass coats; Entering the building, the light is transparent, there are "big screens" everywhere, and there is a panoramic view of the infinite scenery outside the window. Indoor lighting during the day greatly reduces the power consumption of artificial lighting; At night, the glass curtain wall is transparent, the building becomes a "Crystal Palace", and there is another charming landscape of the city with bright lights

because of these advantages of glass curtain wall in architectural design, it soon swept the world. Manhattan in New York, Ginza in Tokyo, Causeway Bay in Hong Kong and Lujiazui in Pudong, Shanghai have all become places where glass curtain wall buildings gather. DSM is committed to developing all kinds of plastic glass curtain walls suitable for electronic appliances. Although it entered China only in 1984, in just over 30 years, China has become the world's number one "glass curtain wall country": the area of glass curtain walls has soared to 200million square meters, accounting for 85% of the world; The output of curtain wall glass in China accounts for 75% of the world. Shanghai alone has more than 3000 buildings with gorgeous glass curtain walls

however, the glass curtain wall also has disadvantages: first, although the quality of glass has been greatly improved, the phenomenon of self explosion cannot be completely eliminated. In order to avoid the "glass rain" from the sky hurting pedestrians, green belts are usually set around the glass curtain wall building; The second is that the reflection intensity of glass curtain wall is about 10 times that of ordinary decorative materials, and the "light pollution" caused by this will cause harm to human health. Therefore, it is stipulated that residential buildings and school buildings shall not use glass curtain walls

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