This is mainly because the application of insulating glass can improve the heat insulation and sound insulation effect of doors and Windows, so that the doors and Windows products can not only shelter from wind and rain, but also have significant energy saving effect, reducing the cost of heating in winter and cooling in summer. At the same time, insulated glass are widely used in the refrigeration area, especially the commercial freezer/cooler. As the main part of freezer/cooler door, the use of insulated glass has greatly reduced the energy consumption and is a very ideal green material.