Definition
A film made from multiple functional layers (coex or laminated) to combine properties like sealability, stiffness, and barrier.
Applications
- High-performance roll stock
- Recyclable mono-material structures
- Vacuum packaging
Benefits
- Tailors performance
- Optimizes cost/performance
- Enables thinner structures with equal strength
Industry Examples
- Medical: multilayer sealant webs tuned for peel strength and sterilization compatibility.
- Industrial: multilayer liners with tough outer skins and chemical-resistant inner layers.
- Electronics: integrates dissipative, conductive, and moisture-barrier layers in a single film structure for MBB applications.
FAQ
Q: How do you choose layers?
A: Start with product threats (oxygen, moisture, puncture) and machine needs (SIT, COF).
Q: Can multilayer films be recyclable?
A: Yes, when designed as mono-material (e.g., all-PE) with compatible barrier layers.