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Defects of Low-E Tempered Glass for Curtain Wall
Source :    Release time:2013-12-13


With people's awareness of environmental protection strengthened, Low-E glass for curtain wall is applied more and more widely in the building industry. In order to ensure safety, curtain wall glass should be tempered by glass tempering furnace. However, in the production of tempered glass for curtain wall, defects will occur to Low-E tempered glass for various reasons, which is a stubborn problem for the manufacturers. Hereinafter the frequent problems in the production of tempered glass for curtain wall and their corresponding reasons and solutions will be introduced. The manufacturers can reasonably utilize their existing equipment to produce high-quality Low-E tempered glass for curtain wall. 

The surface of Low-E glass for curtain wall has a special coating, which changes the heat absorption of glass in tempering furnace. Therefore, the Low-E glass for curtain wall often encounters the following problems during tempering:

A. After entering the furnace, the four corners and edges of Low-E glass for curtain wall will turn upwards, in which case the glass oscillation movement will be affected if the glass is large size. Meanwhile, uneven glass will cause uneven stress on lower surface, so that the quality defects on lower surface increase. Serious uneven stress will result in glass breaking in heating furnace. 

B. The Low-E coating on Low-E glass for curtain wall is destroyed and burned up, and reddish brown spots are left. 

C. Low-E glass for curtain wall breaks and distorts in the chiller, and the glass flatness can not be adjusted by air pressure control. 

D. After tempering process, the Low-E glass for curtain wall fails to be well tempered. 

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