How to Separate PVB Film from Laminated Glass

Separating PVB film from laminated glass is a complex process that relies on exploiting the different mechanical properties of glass and polymer materials. Industrial systems typically use a combination of crushing and mechanical separation to achieve high efficiency.

The process begins with controlled crushing, where laminated glass is broken into fragments of 20–50 mm. The goal is to fracture the glass while keeping the PVB film intact. This allows subsequent separation systems to differentiate between brittle and flexible materials.

Mechanical separation machines use compression rollers and vibration screens to separate glass from PVB. Glass fragments fall through the screen, while the flexible PVB film remains. High-efficiency systems can achieve glass recovery rates of 90–95%.

Moisture content plays an important role in separation efficiency. When PVB moisture exceeds 8–10%, adhesion increases, reducing separation efficiency by up to 15%. Pre-drying systems are often used to maintain optimal conditions.