Producing high-quality laminated glass using a PVB film is a challenging activity that requires real know-how and great attention to a lot of details. If not properly monitored, many factors can negatively impact the end-product. Adhesion is one such critical factor.
Adhesion is what determines by and large the performance of laminated glass. Glass and the PVB film must stick together tightly to ensure a long lasting safe and secure product and ensure great visible appearance. However, the correct adhesion balance must be achieved with the bond between glass and the PVB film, not too strong so that the laminated glass retains the flexibility it needs to resist high impact.
Achieving the right level of adhesion is of primary importance. Failing that, defects are most likely to show, technical problems will occur, performance will decrease and the laminated glass may have to be replaced – a very heavy cost that no manufacturer wants to incur.
What determines the right level of adhesion? Key parameters include the hydroxyl level and humidity level of the PVB film, relative air humidity as well as glass cleanliness.