What is EVOH Barrier Packaging?
Molecular Magic: EVOH combines easy processing with dense polymer chains that block gas.
Unmatched Power: A 1 mm layer of EVOH equals the oxygen barrier of a 10-meter thick wall of standard plastic (LDPE).
🧱 The "Sandwich" Structure
Outer Layers (PE/PP): Protect EVOH from moisture (which weakens it) and provide strength/sealability.
Inner Layer (EVOH): Blocks oxygen and locks in aroma.
🛡️ Common Applications
Food: Meat, cheese, coffee, sauces, baby food (preserves taste & vitamins).
Non-Food: Pharmaceuticals, cosmetics, agricultural chemicals.
Industrial: Car fuel tanks (stops vapor escape), heating pipes (prevents corrosion).
♻️ The Sustainability Challenge
The Problem: EVOH's tight bond with other plastics makes recycling difficult. Even small amounts can contaminate recycled batches, making them brittle.
The Solutions:
Mono-materials: Developing single-plastic high-barrier films.
Low Content: Keeping EVOH under 5% to meet recyclability guidelines (e.g., RecyClass).
New Tech: Using barrier coatings on mono-materials instead of layers.
