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Why does UV glue turn white after curing?
Release time:
2024-01-12
This phenomenon often occurs in the glass industry. The whitening phenomenon is actually the tiny bubbles generated by the glue layer itself, because the glue will shrink during the curing process. If the thickness of the glue layer is uneven or the hardness is too high, the internal stress generated by the shrinkage cannot be released. After a long time, tiny bubbles will appear, which is the whitening phenomenon we see until the bonding material falls off.
This phenomenon often occurs in the glass industry. The whitening phenomenon is actually the tiny bubbles generated by the glue layer itself, because the glue will shrink during the curing process. If the thickness of the glue layer is uneven or the hardness is too high, the internal stress generated by the shrinkage cannot be released. After a long time, tiny bubbles will appear, which is the whitening phenomenon we see until the bonding material falls off. One way to solve this problem is to choose UV glue with flexible formula. The second is to control the adhesive layer evenly. Third, low-power UV lamps are used for initial consolidation to slow down the curing speed of the glue. After positioning, high-power UV equipment is used for deep curing, because the glue curing speed is too fast, which will increase the shrinkage rate of the glue.
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