日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Using insulating glass units is effective to decrease CO₂ in the air and brings comfortable housing environment such as high heat insulation and reduction of window dew. Japan has lagged far behind other nations in the diffusion of insulating glass units. To keep "The next generation saving energy standard" notified in 1999, the diffusion of insulating glass units in Japan is expected. One unit of insulating glass has two pieces of sheet glass separated from fixed air space, and its edge is sealed up. Filling the spacer with desiccant and always keeping dry the airspace stop the inside dew in insulating glass unit. It is the most important required quality in the visible quality of insulating glass units to stop the inside dew. Various standard of insulating glass unit in the world respectively define the accelerated endurance test method and judgment method referring to the insulating glass units' life. In draft of European standard, moisture adsorption capacity of desiccant will be defined as one of the rule of the insulating glass units' life. It is forecasted that quality requirement which extend the life of insulating glass units will be raised in the region where insulating glass units have become widespread so far. And it is forecasted that using the insulating glass units under the severe environment - high temperature and high humidity will increase in the region where insulating glass units will become widespread in the future. The part which synthesized zeolite desiccant used in insulating glass units will execute will be important in the future.