Based on the irrefutable experimental results, we analyze that the most popular desiccant with calcium chloride or the similarities will corrupt the IG unit obviously. It will not only cut down the life span of the IG unit, but also destroy the safety of its structure.
The IG lifespan standard of 15 years will be taken in force this year
The standard means that all the IG unit manufactures must surely keep the lifespan of their IG units up to at least 15 years, or they will be fiercely claimed!
What is the expiration of IG Unit?
Answer: The rapid reduction or complete loss on energy-saving function of IG unit means the end of its service life. This means:
To guarantee IG life-span need to overcome 3 points:
Desiccant is the most essential one
Four kinds of bad-quality desiccants in market
Four kinds of harmful desiccants total up a great market share, the mainly harmful one is Calcium Chloride desiccant, So it is necessary to test how the desiccant will perform in the IG unit.
The harm from 4 bad quality desiccants for IG
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The experiment on the effect of calcium chloride desiccant on IG unit
The effect of desiccants on IG unit
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Photos for the effect ofdifferent desiccants on IG after 9 months at 50 C°
Photo for the effect of 30% water content CaCl2Desiccant on IG (air) after 9monthsat 50 C°
Photo for the effect of 30% water content 3A molecular sieve on IG (air) after 9monthsat 50 C°
Photos for the effect of different desiccants on IG after 9months at 50 C°
Photo for the effect of 30% water content CaCl2Desiccant on IG (air) after 9 months at 50 C°
Photo for the effect of 30% water content CaCl2Desiccant on IG (Oxygen) after 9 months at 50 C°
Photos for the effect ofdifferent desiccantson IG after 9monthsat 50 C°
Photo for the effect of 20% water content CaCl2Desiccant on IG (argon) after 9 months at 50 C°
Photo for the effect of 30% water content CaCl2 Desiccant on IG (oxygen) after 9 months at 50 C°
The photos of eroded aluminum bar
The eroded and crackingaluminum spacer bar
The desiccant has already pulverized and mixed with crystal
Rainbow phenomenon on CaCl2filling IG Unit
No rainbow on 3A IG unit
Rainbow appear on CaCl2filling IG Unit
Analyzing photos of rainbow phenomenon
The rainbow do not disappear after opening the insulating glass, It concludes that the rainbow is not water vapor.
The next testing shows the glass is covered with oil vapor, it can be wiped away with hand.
Conclusion: In the same case, no rainbow phenomenon occurs on the 3A molecular sieve filling IG unit, this means Calcium chloride desiccant will effect sealant heavily.
In conclusion, calcium chloride desiccant destroy the insulating glasses in 4 aspects.
The sealant and spacer is the backbone of IG unit, long term corruption will possibly cause serious safety problem, a large sheet glass may fall from height and it is a innegligible problem.
Zibo Natergy Chemical Industry Co.,Ltd. Mr. Liu Angfeng Tel.:13953393302 E-mail: liu-angfeng@natergy.com Web: www.natergy.com www.natergy.com/en/onews2.asp
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