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    Innovation& Package Engineering

    While some flexible packaging manufacturers offer standard flexible packaging materials, at Copack we engineer customized flexible packaging structures designed specifically for your products.

     

    We've specialized in flexible packaging for 15 years, and our expertise in polymer chemistry and flexible packaging engineering allows us to design optimal, cost-effective flexible packaging materials. We work with a vast range of films, foils, papers, and resins when engineering customized flexible packaging laminations.

     

    A flexible packaging structure typically consists of multiple layers of materials laminated together, with each layer performing a crucial role in your packaging’s performance and presentation.

    Each layer provides specific performance characteristics, such as:

     

    Oxygen, moisture, or light resistance

    Chemical resistance

    Puncture resistance

    Tear resistance

    Rigidity

    Glossy or matte appearance

    Opacity or translucency

    Heat sealability

    Print receptivity

     

    The example below shows the duties each layer performs within a basic five-layer extrusion laminated flexible packaging structure:

     

    1. Exterior Layer

    · Provides dimensionally-stable print surface

    · Protects the ink

    · Protects the barrier layer

    · Plays a role in burst strength & tear resistance

    · Adds to overall pouch strength

    2. Tie Layer

    · Provides another layer of protection for the barrier layer

    · Bonds the outside layer to the barrier layer

    · Hides the color of the barrier layer

    3. Barrier layer

    · Provides chemical resistance

    · Prevents moisture, light, and oxygen transmission

    4. Tie Layer

    · Bonds the barrier layer to the sealant layer film

    · Provides protection for the barrier layer

    5. Sealant Layer

    · Allows the flexible packaging structure to be heat-sealable

    · Provides burst strength

    · Seals the product within

    · Protects the barrier layer