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Until now, the ultimate usage state of Low-E glasses in the overseas and domestic markets is mostly appearing in the insulating glass. It is because the heat transfer coefficient of the exterior surface of the building window glass is composed of 18% radiation and 82% convection and conduction, while that in the interior surface of the building window glass is composed of 58% radiation and 42% convection and conduction. When the insulating glass is formed, a reasonable thickness of the air layer will further lower the percentage of convection heat transfer. For the vacuum insulated glass, the air in the air layer is completely drawn away resulting in a high vacuum with pressure lower than 0.1Pa. Basically, it has removed the convection, conduction and heat transfer of the gases.
The Low-E glass is the raw material for producing vacuum insulated glasses. When Low-E glass and clear glass are used to produce vacuum insulated glasses, it works almost exactly the same way as a regular vacuum glass flask. The radiation rate of the coated Low-E glass has achieved below 0.11, significantly lowering the heat transfer coefficient of the vacuum insulated glass contributing to the elevation the thermal insulation performance of the vacuum insulated glass. With the widespread use of the vacuum insulated glasses, the application conditions of Low-E glasses has become more enriching. The vacuum insulated glasses will have a wide variety of safety glass.