Simply put, the noise-requiring window is generally required by noise-hungry households (such as households along the road, households in the factory area, etc.). Currently, the sound insulation windows on the market can be roughly classified into the following categories depending on the glass used:
1ã€Insulating glass soundproof window
2, vacuum glass soundproof window
3, laminated glass window
In terms of sound insulation, each window has its own characteristics. Now, we will give a general description of these types of glass.
First, insulating glass
In general, the hollow glass is composed of two layers of glass, and the glass and the sealing strip and the glass strip are sealed and sealed with a high-strength and high-tightness composite adhesive around them, and a 6-9 mm air layer is filled with dry gas in the middle. The frame is filled with desiccant to ensure the air dryness between the glass sheets. As shown. Its characteristics, due to leaving a certain cavity, and has a good insulation, heat insulation effect, because this point is widely used in northern cities. Insulating glass has relatively good isolation effect on mid-high frequency noise (such as human voice, high-pitched horn sound, etc.), but it is basically not too low-frequency noise (such as bus engine noise, train noise, aircraft noise, etc.) The effect is that the hollow glass will resonate with the low-frequency noise in the low-frequency area. After detection, the low-frequency noise is no more than 20 db. To remind our friends that many small windows and doors shop are now known as insulating glass of 200-200 yuan per square meter. The window is actually an ordinary double-glazed window. The double-glazed window is two pieces of regular glass plus one frame, without any treatment, and the double-layered window profiles sold at this price are likely to use false materials on the profiles. After a few years, it will become yellow and brittle. I hope you can pay attention when you shop.
Second, vacuum glass
Vacuum glass is generally composed of two layers of 4mm thick flat glass, leaving a 1.5mm thickness in the middle for vacuuming. Because in the process of pumping air, two pieces of glass will develop negative pressure. If the two pieces of glass are not supported, the two pieces of glass will be sucked together and lose the vacuum layer. Therefore, the vacuum glass must be produced in double layers. Between the glass lined with some tiny support points or support brackets.
Because the vacuum glass is drawn into a vacuum, it has a very high thermal resistance, which is a very good thermal insulation product. This is also the original intention of designing vacuum glass, and the insulation performance is also very difficult for insulating glass. Comparatively, but because it is a new thermal insulation and energy saving product that has only been popularized in recent years, it has not yet reached mass production and the price is relatively high. Some stores simply sell hollow glass as vacuum glass to consumers. According to experience, retail price should be less than 1,000 yuan per square meter, and everyone should pay attention to the purchase of glass.
In terms of sound insulation, vacuum glass is better than insulating glass, but the isolation effect of low-frequency noise has not yet reached the level of professional sound-insulating glass. After detection, the decibels of vacuum glass at three low frequency bands of 125HZ, 250HZ and 500HZ are The 22db, 27db, and 28db have no more than 30db, because the supporting brackets used to support the two glasses become sound-borne acoustic bridges—solid-borne sound.
Third, laminated glass
Laminated glass, also known as laminated glass, is sandwiched between two or more pieces of glass with polyvinyl butyral as the main component of the PVB interlayer. The common laminated glass has the following two main advantages:
1, security:
Ordinary glass smashed as soon as it crashed, and the typical broken condition produced many long, sharp, sharp-edged pieces. Tempered glass requires a large impact force to break apart. Once broken, the entire glass bursts into countless fine particles with only a few broken glass in the frame. And even if the laminated glass cracks, the fragments will stick to the film, and the broken glass surface will remain clean and smooth. This effectively prevents the occurrence of fragmentation and penetrating fall events and ensures personal safety.
2, seismic intrusion capability:
In Europe and the United States, laminated glass is used for most architectural glass, not only to avoid injury but also because laminated glass has excellent resistance to intrusion. The intermediate film can resist the continuous attack of hammers, pick hammers, and other weapons, and it can withstand the penetration of bullets for a long time. The degree of safety protection is extremely high.
Although the common laminated glass has the effect of sound insulation, it cannot be regarded as a true soundproof glass, but after a professional technical treatment of the intermediate film structure can achieve a very good sound insulation effect, which is hollow glass and vacuum Places where glass can't match.
Of course, due to the different technical content of different manufacturers, the interlayer insulation glass is not the same as the insulation and heat insulation effect. From the surface, the sound insulation glass of everybody looks the same and is difficult to distinguish. But no matter which kind of soundproof window you choose in the end, it is recommended that friends pay attention to do the following three tasks when purchasing:
1. To the manufacturer's qualified units (such as National Building Materials Testing Center, Tsinghua University Building Environmental Testing Center, National Construction Engineering Quality Supervision and Inspection Center), sound insulation test report, to understand the sound insulation of the soundproof window, according to their own economic conditions and The actual needs, the higher the general sound insulation, the higher the price of sound insulation window, but the sound insulation should not be less than 30dB. If you are in a serious environmental noise pollution or have a high demand for the indoor environment, you should also pay attention to the low frequency sound insulation of the doors and windows and the sound insulation of the lowest sound insulation frequency. Because traffic noise energy is concentrated at low frequencies, the low-frequency sound insulation performance of doors and windows is Its weakest link will inevitably cause low-frequency leakage and eventually affect sound insulation.
2. Sound insulation windows are different from ordinary doors and windows from material selection to craftsmanship. The glass, sealing materials and profiles used for high sound insulation soundproof windows are determined through repeated tests and tests. Manufacturers should have production. Sound insulation window technology and engineering performance, if necessary, to visit each other's engineering samples.
3. In order to make your living environment have obvious effects through the replacement of soundproof windows, manufacturers should be required to test the environmental noise sources that you live in. Although they are all roads but have different road grades, road traffic noises in urban and suburban areas are very low. Big difference. Therefore, the glass structure of the sound-proof window should not be a single mode, but the sound-proof window should be designed according to the frequency characteristics of different noise sources. Ensure that sound insulation performance of sound insulation windows meets the requirements for governance. When signing the contract, you should sign the noise reduction decibels value with the manufacturer after installing the soundproof window!
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