First of all, from the technical requirements of insulating glass products, what technical characteristics should desiccant meet? The insulating glass desiccant needs to be filled in the spacer frame around the insulating glass gas compartment. These frames have tiny pores. The desiccant in the frame should dry the gas in the compartment through these pores to prevent the insulating glass from losing its energy conservation and heat preservation function due to fogging. Therefore, as a drying agent for insulating glass, the following two conditions should be met at least:
1. Because it takes 15 years or even decades for the desiccant to remain in the spacer frame of insulating glass, it needs materials with extremely inert chemical properties and extremely stable physical state to be suitable. Materials with unstable physical and chemical properties are not suitable for use as drying agents for insulating glass, even if the drying effect is good.
2. The insulating glass desiccant shall have the ability to control the low temperature dew point for a long time. The main sign of the failure of insulating glass is the fogging and condensation in the inner cavity under normal working conditions. The lower the dew point of the gas in the glass chamber, the drier the gas is. Under the condition of stable corner water permeability of insulating glass, the greater the water absorption of desiccant per unit weight in dry (low dew point) gas, the longer the desiccant will maintain the low dew point of insulating glass, which means the longer the service life of insulating glass. The average temperature in winter in many areas of our country ranges from 0 ℃ to minus 10 ℃, and even below minus 40 ℃ in the northern cold regions. Therefore, there is a realistic and widespread social demand for insulating glass to remain dew-free at low temperatures. The desiccant with large adsorption capacity under low humidity has become the core choice of desiccant for insulating glass.
Post time: Feb-05-2023