How to Prevent Tunneling in Solventless Lamination
Tunneling is a common but often misunderstood defect in solventless lamination. It appears as elongated channels, lifted areas, or partial separation between laminated layers and may become more visible after rewinding or during curing. Unlike isolated bubbles, tunneling is often associated with stress imbalance between substrates, winding conditions, adhesive distribution, and dimensional changes during curing. Preventing…
