High oxygen barrier polymers are the unsung heroes of the packaging industry, and EVOH is one of the most effective in this class. Its molecular structure allows it to drastically reduce the permeation of gases, particularly oxygen, which is a primary cause of food spoilage. This capability is measured by its oxygen transmission rate (OTR), and EVOH's performance is significantly superior to other common polymers . This makes EVOH indispensable for packaging oxygen-sensitive products.

EVOH's barrier properties are influenced by its ethylene content, with grades containing less than 29 mol% ethylene offering the highest barrier performance. The material's performance is also affected by relative humidity, as its barrier properties can be compromised at high humidity levels, which is why it is often used as an inner layer in multi-layer structures . Recent research has focused on upcycling recycled EVOH into high-performance nanocomposite blown films by incorporating silica nanoparticles, which improves stiffness, strength, and barrier performance .

Leading producers like Kuraray have earned APR Design® for Recyclability Recognition for their EVAL™ EVOH resin, confirming it meets rigorous criteria for compatibility within polyethylene film recycling streams. This recognition is a testament to the material's performance and its role in enabling a circular economy for flexible packaging .

For a comprehensive view of high oxygen barrier polymers, consult the main Ethylene Vinyl Alcohol Market report.

• china engineered wood market
• biocatalyst market
• buildtech textile market