Air expelling when laminating safety glass with PVB Film
Factors affecting normal air expelling:
Temperature required for glass is lower than 25℃, and for PVB lower than 18 ℃。
Cold pumping time is at least 5-20 minutes, with temperature 22℃.
Vacuum degree: absolute vacuum 80% (latm/100kPa)
Vacuum ring’s temperature: lower than 30 ℃. 20-25 ℃ is recommended.
Rheology and the grains on PVB Film’s surface
Each glass is not matched very well to the other glass after hot bending
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