A cast film experimental line is a miniaturized test facility specifically designed for materials science and R&D. It primarily produces cast films to support research activities such as new material formulation development, process parameter optimization, small-batch pilot production, and quality assessment. This equipment typically consists of core components including an extruder, casting die, quenching rollers, traction device, and winding system, enabling continuous film production.

Its working principle involves melting polymer materials (such as PE, PP, and TPU) in an extruder, extruding them through a die to form a film, and then quenching and solidifying it on high-speed rotating cooling rollers to ultimately form a uniform, highly transparent, unstretched film. Compared to blown film processes, cast film experimental lines offer faster production speeds, superior film optical properties (such as excellent gloss and thickness uniformity), and a flat extrusion structure that facilitates subsequent printing or lamination processes.