Insulating glass failure causes and quality control methods
[China Glass Net] High temperature and high humidity durability and water gas seal durability are all inspecting the resistance of the insulating glass system to moisture. Therefore, the performance of the outer sealant directly affects the durability of the insulating glass system. The high temperature and high humidity durability test is a qualitative test for the durability of the insulating glass system, and the moisture sealing durability test room quantitatively detects its durability. It can be seen from the test results in Table 1 that whether it is silicone insulating glass or polysulfide insulating glass, its high temperature and high humidity durability can meet the standard requirements. In the water-gas seal durability test, the water-proof gas permeability of different outer sealant and different thickness of the insulating glass system meets the requirements of the new national standard, but the value of the water permeability index is still significantly different. The average water vapor permeation indexes of 3 mm, 5 mm silicone hollow glass and polysulfide hollow glass were 0.1112, 0.0761 and 0.1080, respectively. It can be seen from the results that the water-proof gas permeability of the silicone hollow glass with thick outer layer is obviously better than that of the shallow silicone glass with water vapor permeability; under the same thickness of the rubber layer, the polysulfide hollow The water vapor permeability of the glass is superior to that of the silicone insulating glass. Taking into account the influence of external conditions, the above conclusions can still be obtained after removing the data with large deviation. Tencel Fabric,Tencel Fabric Woven,Tencel Fabric Shirts,Tencel Fabric Dress Shaoxing Moying Textitle Co.,Ltd , https://www.moyingtextile.com
Hollow glass argon retention data, it can be found that the performance of silicone and polysulfide hollow glass in the gas seal durability performance is far away. The gas retention rate of polysulfide hollow glass is very good. After the new national standard durability test, the gas content is not less than 80%, which meets the gas durability requirements in the new national standard; the silicone hollow glass sample with thick rubber layer is Of the 17 pieces, only 8 of which have a gas content of more than 80% after testing, the pass rate is only 47.1%, and the gas seal durability of the shallow silicone glass is even worse. There are 15 samples, of which only 5 In line with the new national standard requirements, the pass rate is only 33.3%. The average argon leakage of the silicone hollow glass sample with a thick rubber layer was 12.6%, the average argon leakage of the silicone hollow glass sample with a shallow layer was 14.9%, and the average argon of the polysulfide hollow glass sample was 14.9%. The amount of air leakage is only 3.4%. Polysulfide insulating glass is superior to silicone insulating glass in terms of gas seal durability.
In the test of water vapor transmission rate, the average water vapor permeability of polysulfide rubber is 11.42g/m2·d, and the average water vapor permeability of silicone rubber is 22.64g/m2·d. The permeability is twice that of polysulfide, indicating that the polysulfide has better resistance to water vapor permeation than silicone.
The water vapor permeability of polysulfide rubber is twice the water vapor permeability of silicone rubber, but the difference in the durability of water vapor seal is not very large. The reason for this analysis is that we have chosen bending aluminum. The strip structure and the butyl rubber width are more than 5mm, and the joint of the aluminum strip is sealed with butyl rubber, forming a good inner water and gas sealing barrier, effectively preventing most of the moisture from entering, and actually producing In the process, most products do not reach this level of production.