How Vacuum Skin Packaging Works
- Product Placement
The food product (e.g., steak, salmon, cheese) is placed on a rigid tray or flat board. - Top Film Application
A heat-softened skin film (usually a high-barrier, shrinkable film) is draped over the product. - Vacuum Process
Inside the packaging machine, air is evacuated from the chamber, and the film conforms tightly around the product and seals to the tray or board. - Sealing
The film is heat-sealed to the tray’s flat surface—not directly on the product—which avoids crushing or deforming delicate items. - Final Result
The vacuum skin forms a tight, wrinkle-free, transparent layer that securely holds the product in place, providing superior presentation and protection.
Key Benefits of VSP
| Feature | Advantage |
|---|---|
| Extended Shelf Life | High barrier film reduces oxygen exposure and bacterial growth |
| Enhanced Freshness | Preserves natural juices and prevents freezer burn |
| Superior Presentation | Clear, form-fitting film showcases product color and texture |
| Leak Prevention | No movement or liquid leakage in transit or on shelf |
| Vertical Display | Secure fit allows upright retail positioning |
| Reduced Waste | No need for absorbent pads or excess packaging |
Materials Used
- Tray/Substrate Options:
- PET, PP, cardboard boards (for eco-friendly appeal)
- Top Films:
- Multilayer co-extruded films (e.g., PA/PE, EVOH-based films)
- Peelable or non-peelable
- Printable options for branding
Applications
- Fresh or frozen meats (beef, pork, lamb)
- Seafood (salmon fillets, scallops)
- Cheese and deli items
- Plant-based protein products
- Ready-to-cook meals
Required Equipment
- Vacuum skin packaging machine (inline or chamber type)
- Film heater and vacuum chamber
- Tray sealing system (sometimes integrated with MAP)
VSP vs MAP vs Vacuum
| Method | Main Difference |
|---|---|
| VSP | Film tightly conforms to product and tray surface |
| MAP | Tray filled with modified gas mixture (O₂, CO₂, N₂) |
| Vacuum | Entire package is vacuumed and sealed, often with shrink bags |