EVOH (Ethylene Vinyl Alcohol) resins have carved out a significant place in the food packaging industry due to their exceptional barrier properties,especially against gases and moisture. These properties are crucial for preserving the freshness of food, extending shelf life, and maintaining flavor quality, making EVOH an invaluable component in food packaging system
A prime example of EVOH's utility is its application in multilayer food packaging films. Typically, EVOH is used a middle layer in these films, coextruded with other materials like polyethylene (PE) or polypropylene (PP). The outer layers are designed to provide structural support and facilitate heat sealability, while the EVOH layer serves as a potent barrier against oxygen and other gases. This configuration is particularly advantageous for packaging delicate and perishable products such as meats, dairy items, and certain processed foods high in fat content, all of which are highly susceptible to oxidation.