... -shirt bag making single screw double die blowing machine blown film machine,film making machine,plastic making machine,extrucisiont-shirt bag film blowing ... hdpe) and (LLDPE) ,single screw double die film blowing machine setSJ-55 Single screw double die film blowing machine1. Feature:It is ... machine adopts single screw to extrude the material,two die heads to vlow the film The scrw stem and cylinder ...