Do you know why the insulating glass is soaked?
Release time:2017-08-08 22:44:39
It is understood that the biggest problem of insulating glass is the use of air in the condensation, and air layer condensation is the reason that the dew point of the air layer in the use of the process increased. Therefore, the control of insulating glass dew point is the key to control the quality of insulating glass.
Insulating glass is widely used as a new type of energy-efficient building materials, insulation and sound insulation. At the same time the quality of insulating glass is getting higher and higher.
Insulating glass During use, the surface of the dry air layer will cause condensation or frost when the ambient temperature is reduced to reduce the glass surface temperature to the dew point in the dry air layer. Due to the condensation of the inner surface of the glass or frost and affect the performance of insulating glass.
If you ensure that the air layer at minus 40 degrees Celsius above the condensation, the use of insulating glass in the air is not the phenomenon of condensation.
An Analysis of the Reasons for the Rise of Dew Point
The dew point of the insulating glass refers to the temperature at which the air humidity in the air layer reaches a saturated state. Below this temperature, the water vapor in the air layer condenses into liquid water. Can be introduced: the higher the water content, the higher the dew point temperature of the air, when the glass surface temperature is lower than the air layer of air dew point, the air will be in the glass surface condensation or frost on the glass surface.
The dew point of the insulating glass is caused by the outside water entering the air layer without being absorbed by the desiccant, which may cause the dew point to rise for three reasons:
(1) sealant inside the bubble, resulting in air moisture into.
(2) Water vapor is diffused into the air layer through the polymer.
(3) desiccant effective adsorption capacity is low.
Control measures for insulating glass dew point
(1) strict control of the production environment temperature
The production environment mainly affects the ability and residual adsorption capacity.
(2) reduce the diffusion of water through the polymer
Mainly by selecting the low permeability coefficient of the sealant to determine a reasonable thickness of the seal to reduce the difference between the temperature inside and outside the insulating glass (that is, control in a certain temperature range and can not make the temperature range is too large).
(3) reduce the production process time
Minimize the contact time between the desiccant and the atmosphere, reduce the loss of adsorption capacity and make the desiccant have a higher adsorption capacity.
(4) choose the appropriate aluminum
The pores of the airway to small, to reduce the process of molecular sieve water absorption.
(5) Select the appropriate desiccant
Choose a higher and long-lasting desiccant.
I believe that through the election materials, processing, environmental and other aspects of the control, the quality of insulating glass will be significantly controlled.