Flexible packaging is usually built from multiple layers. Each layer has a purpose. PET may provide print quality and strength. VMPET may add metallic appearance and barrier. Aluminum foil can provide very high barrier. PE is commonly used as the inner sealing layer. MDOPE can be used in recyclable PE-based structures.
A structure such as PET / VMPET / PE means PET is the outer layer, VMPET is the middle barrier layer, and PE is the inner sealant layer. A structure such as PET / AL / PE uses aluminum foil as the barrier layer.
The correct structure depends on shelf life, product sensitivity, filling method, sealing requirements, and sustainability goals.
Material selection should be done before artwork because material choice can affect appearance, transparency, metallic finish, and printing result.
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For a faster estimate, use our packaging material selector. You can also compare structures with the packaging material selectoror request a free custom dieline.
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What does PET / VMPET / PE mean?
It means PET is the outer layer, VMPET is the middle metallized barrier layer, and PE is the inner sealing layer.
What does PET / AL / PE mean?
It means PET is the outer layer, aluminum foil is the high-barrier layer, and PE is the inner sealing layer.
Why are flexible pouches laminated?
Lamination combines different layers to improve printing, strength, barrier, and sealing performance.
Can material structure affect design?
Yes. Transparent, metallized, foil, matte, and glossy materials can change the final visual result.
Recommended next step
Confirm your pouch size and material before creating final artwork. This helps reduce design mistakes and production delays.