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[China Glass Network] Each glass has its own characteristics in sound insulation. The insulating glass is composed of two layers of glass. The glass is sealed with a sealing strip and a glass strip by a high-strength, high-air-tight composite adhesive. The air layer of 6-9 mm is filled with dry gas in the middle, and the frame is filled. A desiccant is used to ensure the dryness of the air between the glass sheets. Its characteristics, because it has a certain cavity, and has a relatively good thermal insulation effect, it is widely used in northern cities. In terms of sound insulation performance, high frequency noise in insulating glass (such as human voice, school tweeter sound, etc.) has good sound insulation, but it has low effect on traffic low frequency noise (such as bus engine noise, train noise, aircraft noise, etc.). Not obvious, because the air cavity of the insulating glass will resonate with the low frequency noise of the outside in the low frequency region, and the low frequency noise is easier to enter the room through the glass. Many people think of insulating glass as vacuum glass. In fact, there is a certain difference between the two. The vacuum glass is generally composed of two layers of 4 mm thick flat glass, and a thickness of 1.5 mm is left between the two layers of glass for vacuuming (also other thicknesses). Because the negative pressure is formed between the two pieces of glass during the vacuuming process, the two pieces of glass are sucked together and the vacuum layer is lost. Therefore, when manufacturing the vacuum glass, a certain density of flexible support is placed between the two layers of glass. Point or strip support. Because the vacuum glass is drawn into nearly vacuum, it has the characteristics of high thermal resistance and is a good thermal insulation product. This is also the original intention of designing vacuum glass. The thermal insulation performance is also difficult to compare with insulating glass.
In terms of sound insulation performance, vacuum glass is not necessarily better than insulating glass because the two sheets of glass are almost stuck together after vacuuming, and the rigidity is formed as a whole, and the support tray for supporting the two glasses becomes The sound bridge of the sound - that is, the solid sound, so the vacuum glass has a limited amount of sound insulation, only about 31-33 decibels. Laminated glass is a production process of safety glass, also known as laminated glass in foreign countries. It can be laminated together or laminated. Some laminated glass will foam after sun exposure. This is because the wet clamping method is adopted. Therefore, the laminated glass used in architectural glass generally adopts the dry clamping method, so that the interlayer foaming can be avoided. Although the laminated glass has a good sound insulation effect, it is still lacking, but after adjusting the intermediate film composition and professional technical treatment, it can achieve quite good sound insulation effect, which is incomparable between insulating glass and vacuum glass. . Of course, the interlayer acoustic insulation glass has different sound insulation effects due to different technical contents of different manufacturers.
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Details:
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