Five key points to distinguish vacuum glass and in

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Five key points to distinguish vacuum glass and insulating glass

vacuum glass is a series of products with different characteristics and functions. 5. Mold size and manufacturing tolerance. Taking the most representative standard vacuum glass in this series as a comparison with insulating glass, which is widely used at present, the main properties of the two products are as follows

leading point: sound insulation performance: in most frequency bands, especially the medium and low frequency bands, the sound insulation performance of vacuum glass is better than that of hollow glass, and the overall sound insulation grade is higher than that of hollow glass. At present, the sound insulation performance of sound insulation vacuum glass developed by xinliji company has reached more than 42db. General human ears are sensitive to the absolute frequency test method for flammability of building materials GB 8626 (8) sound with a rate of 1000Hz to 5000Hz, and vacuum glass is effective within this range. The noise difference is 5dB, and the human ear hearing difference is 3 to 4 times

second point: thermal insulation performance: the heat transfer coefficient of vacuum glass is twice lower than that of hollow glass, the thermal insulation performance is significantly better than that of hollow glass, and the thickness is also twice reduced. At present, the heat transfer coefficient of energy-saving walls in severe cold and cold areas is required to be 0 6w/(M2? K), the glass window should be close to the standard of the wall. Ordinary insulating glass can no longer meet the energy-saving requirements of buildings in severe cold and cold regions in China, and Low-E insulating glass can not meet the index of heat transfer coefficient less than 1. Only vacuum glass can meet the requirements of all energy-saving standards in all regions of China

third point: super composite performance: it is particularly worth emphasizing that if vacuum glass is combined with glass deep-processing products such as insulating glass, coated glass, laminated glass, fire-proof glass, coated glass and tempered glass, it will be combined into various "super glasses", and Tianjin Plastic Research Institute will explore breakthrough technologies ", Then various glass doors and windows with different special physical properties and good comprehensive properties will appear in various application fields. By comparing the laminated semi tempered insulating glass and laminated semi tempered vacuum glass in the new site of CCTV, we can see the advantages of the latter. Under the conditions of similar properties, the use of vacuum glass can reduce the K value by several times and the thickness by more than twice. The weight is reduced by one third. Not only the energy saving is considerable, but also the consumables of building foundation and steel and aluminum alloy structures will be greatly reduced

fourth point: anti condensation and frosting performance: since there is no gas inside the vacuum glass, there will be no "internal condensation and fog". Moreover, the vacuum glass has high thermal resistance, and its anti condensation and frosting performance is correspondingly improved. Compared with similar hollow glass, the vacuum glass only condenses when the outdoor temperature is lower

conditions: room temperature 20 ℃, indoor natural convection, outdoor wind speed 3.5m/s. One side of vacuum glass is low radiation glass

fifth point: vacuum glass also has the following advantages: because the interlayer is a sealed vacuum layer made of all glass material, plus a long-term getter, and there is no heating element that must be installed in electric vacuum devices such as picture tubes and bulbs, modern vacuum technology can completely ensure that the vacuum glass has a vacuum life of more than 20 years; At present, the Low-E films with high quality and low radiation are all based on silver films, which are afraid of moisture and oxidation. This kind of film is placed in vacuum glass to find the best "shelter", which can ensure its high efficiency and long life; As the vacuum glass itself is a negative pressure device, there is no problem of expansion and cracking when it is transported to plateau low pressure areas or encountered negative wind pressure, and there is no problem of increasing the thermal conductivity of hollow glass when it is installed horizontally and at a tilt rate

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