Building Laminated glass

If glass is broken and damaged to very sharp and dangerous part that can cause damage to the towers and residential, commercial, etc., the use of laminate glass is important and important to prevent the disintegration of broken parts. Laminated glass consists of two or more plies of simple glass or tempered glass that is bonded to each other during the production process with one or several PVB plies. One of the advantages of laminated glass is its high resistance to fire, impact, and pressure.

Safety Glass Shargh in 2008, with the import of modern laminate glass manufacturing machinery, was the first to manufacture flat and curved laminate glass in Iran. At present, the company has the ability to produce laminate glass with the sizes of of 7*2.80 m.

As mentioned above, laminate glass is a safety glass containing two or more glass layers along with PVB (Polyvinyl Butyral) laminate plies that are produced during a combination of pressure and temperature. PVB’s of different thickness, most of which are 0.38 mm and 0.76 mm and 1.52 mm, are used to make laminate glass. The number of plies of laminate glass is determined by the type of application. The presence of PVB in the two plies of the glass causes the glass to disintegrate after breaking, and the broken glass particles are kept sticky and do not spread in the environment. Therefore, the use of laminated glass in high-rise buildings is very effective in preventing the risks of natural disasters such as earthquakes and fires that crush ordinary and tempered glass.

One of the advantages of laminated glass is that several glass types can be used simultaneously in different plies and enhance the efficiency of the glass.

Advantages and Characteristics of Laminated Glass:

1)Light control and reducing energy consumption

2) Reducing noise pollution:

Voice pollution is one of the most important issues in large and populated cities and reducing it in indoor spaces, including homes, hospitals, etc. has become one of the most important issues in the architecture industry. The unit of measurement is the dB. The intensity of the sound differs in different environments. The approximate range of sources of noise is shown in the following table.

In large cities, the intensity of noise is about 65 to 75 dB, while for centers like hospitals that need calmness, it is about 38 dB. The degree of glass insulation versus Sound Transmission is called Class (STC) and is expressed in terms of dB. The higher the amount of this quantity for glass, the higher is the insulating capacity for noise pollution.

3) Safety against Impact and Fire and Earthquake:

One of the most important benefits of laminate glass is its safety against impact, and accidents such as earthquakes and fires. Normal and tempered glass are broken and damaged by impact and in case of earthquakes and a fire due to severe mechanical and thermal stresses. This creates a lot of danger and the destruction of the glass wall causes the penetration of fire to the other parts and increasing the chances of robbery. Laminated glass is resistant to impact and extreme mechanical and thermal pressures because of the existence of PVB and if it is broken it does not disintegrate and the parts remain steady. This advantage eliminates the possibility of penetrating fire from glass to other parts during the fire and the intrusion of robbers.

Preventing the disintegration of glass pieces in high-rise buildings is one of the important issues of safety during an earthquake. This feature of laminated glass makes this type of glass suitable for use on the ceiling of swimming pools, public areas, high buildings, windows of stairwells, etc.

4) Resistance to Ultraviolet Diffusion or U.V:

The sun is composed of three main spectra, including ultraviolet light, visible light and infrared light. UV is part of sunlight with a wavelength between 290 and 380 nm, which is very harmful to human health, and its long-term exposure and radiation can change the color of the furniture, carpet and curtain.

The visible light is 380 to 780 nm in diameter, visible to the human eye, and is not harmful and only its excessive radiation is not suitable in some environments. Infrared light is 790-3000 nm. This part of the sunlight is partly felt in the heat. Heat transfer occurs through radiation by these waves. About two-thirds of the energy input and output through the window flows as radiation in the infrared spectrum.

The presence of PVB between the laminate glass plies makes this glass resistant to U.V radiation. By increasing the thickness of the PVB, the insulating of this glass increases compared to U. V, and the use of 1.52 mm thick PVB in glass will prevent U.V. infiltration up to 95%. Using Sunergy and Low-E glass together with other laminate glass will completely prevent harmful U.V and infrared radiation, and play an important role in maintaining human health and furniture’s color fastness.