[China Glass Net] The dew point of the insulating glass refers to the temperature at which the humidity of the air sealed in the air layer reaches a saturated state. Below this temperature, the water vapor in the air layer condenses into liquid water. It can be introduced that the higher the water content, the higher the dew point temperature of the air. When the inner surface temperature of the glass is lower than the dew point of the air in the air layer, the moisture in the air will condense or frost on the inner surface of the glass.
The dew point rise of the insulating glass is caused by the outside moisture entering the air layer without being absorbed by the desiccant, and there are three reasons why the dew point may rise:
(1) There are air bubbles in the sealant, which causes air moisture to enter.
(2) Water vapor diffuses into the air layer through the polymer.
(3) The effective adsorption capacity of the desiccant is low.
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