PVC Calendering and Lamination

PVC calendering produces continuous film (0.1–2.0 mm thick) by passing compounded PVC through heated calendar rolls (160–190°C, 4–5 roll configuration) at speeds of 20–60 m/min, then laminating to textile substrate under pressure at 140–160°C. Film-to-fabric bond strength exceeds 40 N/5cm for woven polyester substrates. Bi-axial orientation during calendering improves tensile strength by 15–20%. Film width up to 3.6 m is achievable for wide-format architectural applications. Annual global PVC film production for textile lamination exceeds 800,000 tonnes, used in inflatable boats, pool liners, and membrane roofing.