[China Glass Network] China is becoming a big glass curtain wall country, producing 70 million square meters of glass curtain wall every year, accounting for 75% of the world's output; the existing glass curtain wall is 200 million square meters, accounting for 85% of the world. The glass walls, which are regarded as the symbol of a modern metropolis, are now exposing a lot of problems. These glass walls are like untimed bombs hanging over people's heads. For the glass curtain wall project, the relevant standards should be further improved and supplemented, especially for densely populated and intensive construction projects. For the design, selection and installation of glass, the construction administrative department must clarify the main body of responsibility and the scope of responsibility according to the requirements of standards and regulations. And strengthen supervision and implementation. At present, the function of architectural glass is no longer just to meet the lighting requirements, but to have the characteristics of adjusting light, thermal insulation, and safe art decoration. Architectural glass mainly includes two types of ordinary architectural glass and decorative glass. Among them, ordinary architectural glass mainly has three kinds of flat glass, energy-saving glass and safety glass. First, the energy-saving glass commonly used in energy-saving glass buildings is heat-reflective coated glass, Low-E (low-emission) glass and insulating glass. Low-E glass, as an important building energy-saving material, is playing an increasingly important role in promoting energy conservation in China's buildings, and has been widely used in various high-rise buildings. Low-E glass, also known as low-emissivity glass, is a film-based product that is coated with multiple layers of metal or other compounds on the surface of the glass. The coating layer has high transmission of visible light and high reflection of mid-range infrared rays, which has the following obvious advantages: (1) Excellent thermal performance The heat loss of the outer door and window glass is the main part of the building's energy consumption, accounting for more than 50% of the building's energy consumption. Ordinary float glass has an emissivity of up to 0.84. When a low-emissivity film based on silver is applied, the emissivity can be reduced to less than 0.1. Therefore, the use of Low-E glass to manufacture building doors and windows can greatly reduce the transmission of indoor thermal energy to the outside due to radiation, achieving an ideal energy saving effect. (2) Good optical performance Low-E glass has a high transmittance for visible light in sunlight, up to 80%, and a low reflectance. When viewed from the outside, the appearance is more transparent and clear, which ensures the good lighting of the building, and avoids the light pollution caused by the light reflection of the large-area glass curtain wall in the past, creating a softer and more comfortable light environment. The quality problems often appear in coated glass or Low-E glass mainly include: 1 corrosion of the film, oxidation, etc., 2 poor sealing of the coating or Low-E glass cavity, 3 coating or Low-E glass cavity A rainbow phenomenon has appeared. Case: Recently, there have been many rainbow-colored roads on the glass curtain wall of an airport terminal in Chongqing. No relevant responsible person has come forward to solve the problem, resulting in the rainbow pattern is still increasing, seriously affecting the appearance and quality of glass safety. . The main reason is that “the use of low-quality and inferior sealant causes quality problems in the glassâ€. Due to fierce market competition, many glass manufacturers have reduced the sales price of their products in order to win market share. Therefore, low-cost mineral oil is used as a plasticizer for sealants to reduce production costs. This has brought many unsafe factors to the use of architectural glass curtain walls. Mineral oil can create holes in the sealant and butyl rubber, so that the sealed cavity of the coated hollow glass communicates with the atmosphere, causing the hollow glass to fail, resulting in condensation of the hollow glass cavity of the coating, which will seriously enter the water and make the glass a fish tank. . Second, safety glass mainly has tempered glass, laminated glass and wired glass. 2-1 Tempered glass: The reason why tempered glass has high impact resistance is because a strong compressive stress is formed on the surface of the glass after heat treatment in a tempering furnace. The presence of such stress, to some extent, offsets the impact from the outside, thus exhibiting the high strength of the tempered glass, and the greater the stress, the higher the strength of the tempered glass. However, the glass curtain wall has experienced frequent explosions, and many innocent people have become victims of many high-rise glass curtain wall falls. The reasons for breaking the balance leading to the breakdown of tempered glass are external and intrinsic. External causes include excessive load, collision, improper clearance and edge damage; internal factors include: 1 tempered glass edge processing defects, sharp corners, hole opening and other stress concentration areas, excessive stress, 2 tempered glass The internal stress is too large, and nickel sulfide impurities are present inside the 3 tempered glass. The first two factors are caused by process control during the processing of tempered glass, and the nickel sulfide factor is produced in the original glass production process. The fragmentation caused by internal factors is called self-explosion. Self-explosion is not completely avoided for tempered glass, and there is no aura. The probability of occurrence is usually 2-5 ‰. If you look closely at the common sides of the two small pieces of glass (similar to the torso part of the butterfly), there is black visible to the naked eye. Small particles can be judged to be self-explosive caused by nickel sulfide stones. Modern glass production technology can not eliminate the existence of nickel sulfide impurities 100%, and can only homogenize the tempered glass to reduce the self-explosion rate. Interlock Fabric,Cupro Knitted Fabric,Luster Polyester Fabric,Copper Polyester Spandex SHAOXING LINGGE TEXTILE CO., LTD. , https://www.lingertex.com