Insulating glass is widely used as a new energy-saving building material, heat insulation and sound insulation. Together, the quality of insulating glass is increasing. It is understood that the larger quality problem of insulating glass is the condensation of the air layer in the application, and the reason for the condensation of the air layer is that the dew point of the air layer is raised during the application process. Therefore, controlling the dew point of the insulating glass is the key to controlling the quality of the insulating glass. During the operation of the insulating glass, when the ambient temperature drops to the dew point of the glass surface to the dew point, the appearance of the dry air layer may be dew condensation or frost. The function of the insulating glass is affected by condensation or frost on the surface of the glass. If it is ensured that the air layer does not condense above minus 40 degrees Celsius, the insulating glass does not exhibit the appearance of air layer condensation during the application process.
1. The reason for the rise of the dew point is that 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 surface temperature of the glass surface is lower than the dew point of the air in the air layer, the moisture in the air will show condensation or frost on the glass surface. . The dew point rise of the insulating glass is formed by the external moisture entering the air layer without being absorbed by the drying agent. There are three reasons why the dew point may rise: (1) There are bubbles in the sealant, which causes air moisture to enter. (2) The water vapor is dispersed into the air layer through the polymer. (3) The useful adsorption of the desiccant can be low.
2, hollow glass dew point control measures (1) strict control of the production environment temperature production environment primary impact attached to the remaining adsorption capacity. (2) The reduction of moisture through the dispersion of the polymer is mainly based on the selection of a low permeability coefficient of the sealant, to determine a reasonable seal thickness, to reduce the surface temperature difference of the insulating glass (ie, the control is produced within a certain temperature scale without making the temperature scale too large ). (3) Reduce the time of production of the desiccant and the atmosphere as much as possible, and reduce the loss of adsorption capacity, so that the drying agent has a higher adsorption capacity. (4) Select a suitable aluminum profile, and the pores of the pores should be small to reduce the water absorption rate of the molecular sieve during the operation. (5) Selecting suitable desiccant should select the drier with high adsorption rate and durability. Trust the control of materials, processing, environment and other aspects, the quality of insulating glass will be significantly controlled.
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