Multi-layer extrusion lamination machine extrusion technology is using two or more than two different plastics by extruders to

get the convergence of multi-layer structure laminated film, and cooling by the cooling roller. 

Multi-layer co-extruded cast film extrusion technology is also a traditional film extrusion process. This method produces a wide 

range of films of different materials with high processing precision, especially when processing semi-crystalline thermoplastics.