[Medium glass] 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.
Insulating glass dew point control measures:
1. Strictly control the production environment temperature: the production environment mainly affects the attached capacity and residual adsorption capacity;
2, reduce the diffusion of water through the polymer: mainly by selecting a low permeability coefficient of the sealant, determine a reasonable seal thickness, reduce the temperature difference between the inside and outside of the insulating glass (that is, control production within a certain temperature range without making the temperature range too large.
3. Reduce the production process time: minimize the contact time of the desiccant with the atmosphere, reduce the loss of adsorption capacity and make the desiccant have higher adsorption capacity.
4. Choose a suitable aluminum profile: the air-tightness of the pores should be small to reduce the water absorption of the molecular sieve during the operation.
5. Choose a suitable desiccant: choose a desiccant with a high adsorption rate and a long lasting effect.
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