Definition
A thin aluminum layer used as a near-hermetic barrier to oxygen, moisture, aroma, and light within a laminate.
Applications
- Pharma sachets
Benefits
- Maximizes barrier performance
- protects light-sensitive ingredients
- enables long shelf life
Industry Examples
- Medical: foil sachets for powders requiring moisture and oxygen protection.
- Industrial: foil barrier wraps for corrosion-sensitive metal components.
- Electronics: forms the core barrier layer in JEDEC-compliant Moisture Barrier Bags (MBB) to achieve ultra-low MVTR for moisture-sensitive semiconductors (MSL-rated devices).
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FAQ
Q: Does foil impact recyclability?
A: Yes—mixed-material foil laminates are typically not store-drop-off recyclable.