Laboratory calendering unit: It is composed of measuring and controlling main machine, conical twin screw extruder or single screw extruder, calendering machine, traction coiler and on-line detection system. The equipment adopts precision extrusion and high-performance calendering technology. It is suitable for the calendering film forming of PE, PP, PS, ABS, PVC, PET, PC and other macromolecule materials. Equipped with visual system, it can simulate the production process of calendering film forming and on-line detection of polymer materials in laboratory. It is an ideal experimental equipment for high precision and high performance film forming.