*3.3.1.1 Polyolefins*

Polyolefins (POs) are by far the largest class of synthetic polymers made and used today. PO is a collective term for multiple types of plastics: polyethylene (PE) and polypropylene (PP), the two most frequently used plastics in food packaging industries [6, 28]. Several factors have been principally responsible for the great success that POs have enjoyed: low cost of production, lightweight, and broad range of mechanical and chemical resistance properties. The combination of all of these factors has led to the enormous number of ways in which polyolefins are now being so vast in our lives [29].
