*3.3.1 Synthetic polymers*

Nowadays, thanks to their predefined properties, polymers are becoming more popular in food packaging. Their desirable performance of mechanical strength thermal stability and, as good barriers to gases and aromatic compounds, syntheticbased polymers are in high demand as packaging materials. The main reasons for the popularity of such polymers are their low cost and widespread availability. Namely, polyolefins are one of the most common plastics used in food packaging. Polyethylene and polypropylene stand out among the finest polyolefin categories owing to their lightweight, processability, flexibility, strength, reusability, and resistance to moisture and chemicals [27].
