... film blowing machine: 1.pof shrink film 2,blown machine 3.pof film,shrink film 4, shrinkable film machine POF film blowing machineThe POF3-Layer coextrusion(polyolefin) heat shrink film blowing machine is designed and ... film. Our products have good transparent,low temperature resistant ,flexible , high shrinkage rate,light specific gravity and ... adopts technology of two-extruder three -layer coextrusion ...