PP film blowing machine 38CRMOALA hard screw and barrel high output, economical, easy operation PP film ISO, SGS,CE standard SJF-55, 60, 70, 75 PP Film Blowing MachineCharacteristics1. This machine set adopt bottom blow type to produce polypropylene plastic film with good fransparency and without such phenomena as flow liner, corrugation and fold, etc. 2. This screw material cylinder is ...