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Insulating glass is a multi-glass combination consisting of two or more panes enclosing a hermetically-sealed air space. The most important function of insulation glass is to reduce thermal losses, which offers many advantages: lower energy consumption, perfect transparency by reducing the incidence of condensation on the warm air side and the possibility of using larger glazed areas without increasing energy consumption. Insulating glass is a glazed unit combined of two or more glass panes separated by spacers which are filled with desicant. The edge of insulating glass is sealed by sealants to reduce water vapor’s penetration.Desicant in the spacer performs an essential act for the dryness of air contained in insulating glass unit,dried gas in insulating glass unit would help to insulate heat and noise,reduce thermal losses and prevent the condense of vapor at high temperature.The special structure of insulating glass offers many advantages:reduce energy consumption,improve the transparency by avoiding the vapor condense,make large glazed areas possible without much energy cost and impede noise transfer. The interspace of insulating glass is filled with dry air or other gas.During the making,insert the aluminum rack which has desiccant,and then fill the first layer of butyl rubber in air space and put the frame between two pieces of glass,and lastly make Thiokol,polyurethane rubber and silicone rubber.Insulating Glass can decrease the heat transmission in the environment of indoor and outdoor.and lower the expenses of air-conditioner and reduce the energy consumption.It has good soundproof function so the indoor circumstance is more comfortable.It can enhance the thermal resistivity of Insulating Glass if using coated glass. Due to the existence of insulating glass can be absorbed water molecules inside the dryer, the gas is dry, the temperature decreases, the hollow glass house does not produce the phenomenon of Gel, the same time, the outer surface of hollow glass dew point will be l high. For example, when outdoor wind speed 5m / s, room temperature 20 °C, relative humidity of 60%, 5mm glass when the outside temperature is 8 °C started condensing, and 16mm (5 +6 +5) insulating glass under the same conditions, outdoor temperature of -2 °C when the dew, 27mm (5 +6 +5 +6 +5) three-layer insulating glass in the outdoor temperature of -11 °C to commence the condensation. As the good insulating properties of insulating glass, the glass on both sides of a larger temperature difference, but also can reduce the cold radiation effect; when the outdoor temperature is -10 °C, the room temperature of single-layer glass windows before the hollow -2 °C window before the temperature is 13 °C; in the same housing structure, when the outdoor temperature is -8 °C, indoor temperature is 20 °C, 3mm ordinary single-glazed interior space of cold radiation region accounted for 67.4%, while the use of double - Hollow Glass (3 +6 +3), compared with 13.4%.