Filling the insulating glass with nearly 100% dry argon gas can improve the insulating glass insulation performance, sound insulation performance, reduce the dew point of the insulating glass, prevent the oxidation of the coated glass, and reduce the number of insulating glass failures caused by the stress of the insulating glass. Keeping the argon gas that has been filled into the insulating glass for a long time is very beneficial to maintaining the good performance of the insulating glass and extending the life of the insulating glass (the life of the insulating glass should be more than 15 years).

According to foreign literature, the annual leakage of argon filled in qualified insulating glass does not exceed 1%. In this way, if the initial concentration of argon filled into the insulating glass is more than 85%, the concentration of argon inside the insulating glass is still more than 60% after 15 years, the insulating glass still has a relatively good performance. However, many filled hollow glass factory measurement hollow glass filled with argon concentration has reached more than 85%, but after a period of time to measure the argon content decreased or no argon. There are usually several reasons for this:

1, in the process of insulating glass production or just done insulating glass handling (especially large insulating glass) is also prone to air leakage factors.

2. LOW-E and other coated glass do not remove the film well, resulting in gas leakage at the adhesive joint.

3, insulating glass sealant quality problems. Insulating glass is an airtight sealing space composed of butyl adhesive, structural adhesive double seal, glass and spacer. Butyl adhesive and structural adhesive play the role of double-channel sealing, if the butyl adhesive and structural adhesive of one of the two or one of the quality is not good, the sealing performance of the insulating glass can not meet the sealing standard, which leads to the increase of the argon leakage rate inside the insulating glass.

4. The surface of the glass or spacer is not clean or there is oil, which will make the adhesive surface leak.

5. There is a problem with the glue coating process. The butyl glue applied on the spacer strip should be uniform, without uneven width and broken strips. Special attention should be paid to ensure that the butyl adhesive coated should have sufficient width and sufficient thickness (thickness is often overlooked). Structural adhesive is the second seal of insulating glass, and it should also be uniform in thickness and maintain sufficient thickness.

6. There is an unsealed point on the spacer frame. The four corners of the spacer frame made of insert angles must be sealed with butyl adhesive. The connection of the straight plug-in of the whole bending frame, the filling hole and other places that may not be sealed should also be sealed with butyl glue.