EVAL® Film (EVOH High-Barrier Film)

Ultra-low OTR × Transparent × Chlorine-free

EVAL film product photo

To meet food safety and environmental requirements, EVAL film (EVOH) is widely used in multilayer film packaging, making it an ideal barrier material for food, pharmaceuticals and chemicals.

It not only replaces traditional chlorine-containing films (such as PVDC, KOP, KPET) but also offers extremely low oxygen transmission, excellent transparency and eco-friendly properties, making it the first choice for premium long-shelf-life packaging.

Structure and Principle
  • EVOH naturally "fears moisture and blocks oxygen", so it is commonly sandwiched in multilayer films as the barrier core layer.
  • Single-layer EVOH is brittle and difficult to process, so co-extrusion is used to sandwich it between PP, PE, PA or PET, forming XX/EVOH/XX structures.
    • Using EVOH as the core barrier layer in multilayer films achieves high barrier performance and packaging stability.
    Common Structures

    PA / EVOH / PE: used for vacuum packs and retort pouches, balancing puncture strength and heat sealability.

    PP / EVOH / PP: used for nutritional drink cups and sauce packets, supporting hot-fill and microwaving.

    PET / EVOH / PE: applied to ambient pouches and soy sauce packets, combining printability with gas barrier performance.

    Material Features

    Ultra-low oxygen transmission rate: OTR below 0.02 cc/m²·day at 23°C, 0% RH.

    Long preservation and aroma retention: effectively blocks oxygen and retains aroma, extending freshness.

    Oil and solvent resistance: suitable for packaging oily foods, pharmaceuticals and chemicals.

    High transparency and glossy appearance: suitable for display and premium visual design.

    Adjustable ethylene content: allows tuning of toughness and barrier properties for different applications.

    Environmentally incinerable: chlorine-free, produces no toxic gases when burned.

    Food-grade safety: meets FDA and EU high standards for food contact.

    Co-extrusion processing: multilayer structures such as PP/EVOH/PP enhance mechanical and sealing performance.

    Microwave and metal-detection safe: no metal layer, allowing microwave heating and passing metal detectors.

    Applicable Products
    Ketchup, fruit puree, soy sauce, coffee beans, nuts, biscuits, pet food, milk powder inner bags, sterilization pouches for medicines and other products that require high oxygen barrier and stable packaging.
    Summary
    Multilayer films with EVOH as the core barrier layer provide extremely low oxygen transmission, transparency, aesthetic appearance and environmental advantages. With proper structural design to overcome moisture sensitivity, they are widely used in food, pharmaceutical and premium long-shelf-life packaging.