Controlling the passage of gases, vapors, solvents and oils either into or out of the product inside of a package is the main function of barrier resins.  Barrier resins enable manufacturers to keep products fresher longer, reduce the transfer of flavors, extend shelf life and protect against contaminants. 

For example, DuPont™ Selar® barrier resins provide unique oxygen barrier properties in wet, cold environments, making them a perfect choice for flavor-sensitive refrigerated foods and beverages.