Simply say PE film blowing machine is polyethylene as raw material,PP film blowing machine is using polyethylene as raw material.
Polyethylene:A polymerized vinyl resin used especially in containers,kitchen utensils,and tubes,or in rolls and sheets for packaging.
Polypropylene:A thermoplastic resin that is a polymer of propylene.They are very hard and are used to make castings and fibers.
