specially product PE heat shrink film. rotary heat,double rewinding PE shrink film blowing machine is used to blowing the various PE thermal shrink-ing membranes which are applied extensively to food ,medicine ,beer bottle,material bottle ,box, case, cloth reel ,floor ,glass ,all sizes of trays ,pottery ,tissue ,etc Model Sj-55 SJ-60 Screw Diameter 55mm 60mm Screw Rario L/D 28:1 L/D 28:1 Screw ...