[China Glass Net] The vacuum box test can not pass, indicating that the sealing of the insulating glass has a gap, so that the hollow glass does not undergo external deflection under vacuum. This situation often occurs in the case of poor manual quality.
The ultraviolet irradiation failed, and an oil film formed by cooling the volatile organic surface gas appeared on the inner wall of the glass in the hollow glass air layer. It is indicated that the desiccant in the hollow glass cannot effectively adsorb the volatile organic solvent in the air layer. In this case, it is easy to appear on the insulating glass made of polysulfide rubber single-pass seal and using 3A or 4A molecular sieve desiccant.
The failure of the high temperature and high humidity test indicates that there is a condensation phenomenon in the air layer of the hollow glass, which is caused by the fact that the insulating glass sealant does not effectively prevent external moisture from entering the hollow glass air layer. In this case, it is easy to appear on the insulating glass which is sealed by a single pass of polysulfide rubber.
The failure of the climate cycle test indicates that there is water condensation in the air layer of the insulating glass. The reason is that the insulating glass sealant does not effectively prevent external moisture from entering the hollow glass air layer. This situation often occurs on insulating glass made of composite strips.
The above five test contents are mandatory testing items for China's national insulating glass testing. In addition, there are two contents of argon gas retention rate and P1 detection in foreign countries.
Argon gas retention rate detection, significant change before and after the argon gas retention rate test indicates that there is a gap in the sealing of the insulating glass, resulting in an increase in the dew point after the test. The test methods used in the specific test are the above-mentioned ultraviolet irradiation, high temperature and high humidity test, and gas circulation test.
P1 detection, P1 detection is an accelerated aging test for detecting the life of an insulating glass seal. Test conditions: high temperature 60 ° C, continuous water spray and 2500 microwatts per square centimeter of ultraviolet radiation. The use of different insulating glass (sealing) structures reflects the difference in seal life is quite obvious. Insulating glass with a short sealing life is often used in the case of a single-pass sealing structure (including a single-sealed composite strip).
The failure of the sealing of the insulating glass may be manifested in one aspect of the above seven items, or it may be several aspects or all. For example, the formation of ultraviolet radiation causes the oil film formed on the inner wall of the glass in the air layer after the organic matter is volatilized and cooled, and even if the sealing of the insulating glass is intact, it may occur if the desiccant used does not match.
The failure of the insulating glass seal directly manifests itself in the condensation phenomenon in the air layer of the insulating glass; a small gap occurs in the sealing failure, and the inner wall of the glass in the air layer reaches saturation condensation due to the desiccant (temperature is greater than zero degrees Celsius) or frosting (temperature is less than Celsius) Zero degree). As time goes by, the water in the hollow glass air layer accumulates more and more, forming a "fish tank" phenomenon.
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