- **Aluminum Foil**:

A thin film made by rolling metallic aluminum, often laminated with other films (e.g., aluminum foil + PE).  

- **Metallized Films**:

Films (such as PET or CPP) with a thin aluminum layer vacuum-deposited on their surface, forming metallized PET (VMPET), metallized CPP (VMCPP), etc.  

Advantages  

- **Exceptional Barrier Performance**: Almost completely blocks oxygen, moisture, and light, significantly

     extending product shelf life (e.g., packaging for milk powder, coffee).   - **Excellent Light Shielding**: Prevents product deterioration caused by ultraviolet rays

    (e.g., packaging for pharmaceuticals, vitamins).   - **Cost-Effective Metallized Films**: Metallized films are cheaper than pure aluminum foil while retaining

   a certain degree of transparency (with a metallic luster), offering a strong visual texture.   - **Good Ductility of Aluminum Foil**: Suitable for lamination processing.  

Disadvantages  

- **Poor Standalone Usability of Aluminum Foil**: Prone to wrinkling and tearing, so it must be laminated

   with other films and cannot be used alone.   - **Scratch-Susceptible Metallized Layer**: The aluminum layer is easy to scratch, requiring protection

   during printing; otherwise, barrier performance and appearance will be affected.   - **Difficult Recycling**: Separating aluminum from plastic in laminated films is costly, resulting in

     relatively poor environmental friendliness.   - **Higher Cost Than Ordinary Plastic Films**: Pure aluminum foil is even more expensive.  

Applicable Scenarios  

- Packaging for foods requiring long-term freshness (e.g., milk powder, coffee, tea);   - Pharmaceutical packaging (e.g., aluminum-plastic blister packs for capsules);   - Packaging for light-sensitive products (e.g., bags for cosmetic serums).