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Dew point control for insulating glass

  • Author:fanyumaoyi
  • Source:chinamirrormanufacturer.com
  • Release on:2017-03-14
  Insulating glass as a building material, because it has good heat insulation and sound insulation properties and is widely used. While increasing demand for the quality of the insulating glass. It is understood that the quality of the insulating glass is used in the air condensation, while air condensation is the dew point of the air used in the process increased. Dew point control for insulating glass is to control quality of the insulating glass.

  Insulating glassIn the course of using, when the ambient temperature is lowered to reduce the surface temperature of the glass to dry when the dew point of the air, dry air will produce condensation or frost on the surface. Due to the glass surface condensation or frost affects performance of insulating glass. If the air layer above the lingxia40sheshidu no condensation, insulating glass used in the process is the condensation of the air layer does not appear.

  1, dew point analysis of the reasons for the increase

  Dew point of insulating glass refers to seal in humidity in the air reaches saturation temperature. Below this temperature, water vapour in the air condenses into liquid water. Available: higher water content, the higher the dew point temperature of the air, when the inner surface of the glass when the temperature is below the dew point of the air, moisture in the air is in the glass surface condensation or frost.

  Dew-point rise by the outside world of the insulating glass desiccant absorption layer of moisture into the air without being caused, there are three reasons may cause the dew point rises:

  (1) sealed plastic bubbles, causing moisture into the air.

  (2) water through polymer layer into the air.

  (3) desiccant absorption ability is low.

  2, measures dew point control for insulating glass

  (1) strictly controlled production environment temperature

  Main influence capacity and residual adsorption capacity of the production environment.

  (2) water through the spread of polymers

  Rely mainly on select sealant of low permeability coefficients, determine a reasonable thickness of seal, reducing the temperature difference between inside and outside of the insulated glass (that is, control the production does not make within a certain temperature range temperature range is too large. )

  (3) reduce production time

  Desiccant minimizing contact with the atmosphere of the time, reducing the adsorption loss and give the desiccant has a high adsorption capacity.

  (4) suitable aluminium profiles

  The pore gas seams should be small, reducing the water absorption of zeolite during the operation.

  (5) suitable desiccant

  To select the desiccant adsorption rate is relatively high and persistent.

  Through choice of materials, processing, environment and all aspects of control, control of insulating glass, the quality will be greatly.
insulating glass