... Process flow: feeding→molten extrusion→filter→forming in die-head→film blowing up→cooled by air ring →firm bubble →traction→winding→ pile up ... , double screw extruder , Plastics canopy production equipment , Mulch film machine , Plastic film granulation recovery facility , Large earthwork film equipment , Profiles production equipment. LD1300 two-layer Packaging film blowing machine