What is Cold Forming Foil?
Cold Forming Foil (also known as Deep-Draw Alu-Plastic Blister Foil) is a multi-layer laminated material produced by bonding aluminum foil with plastic films through advanced lamination technology.
Its key feature is the ability to undergo deep drawing at room temperature while maintaining perfect interlayer integrity—making it ideal for creating highly sealed blister packaging.
If you open a strip of pharmaceutical blister packaging, the shiny, highly formable layer you see is cold forming aluminum foil.
Cold Forming Foil Structure
Typical Layer Structure:
OPA (Nylon) 25–30 μm / Adhesive / Aluminum Foil 45–60 μm / Adhesive / PVC 60–100 μm
Cold forming foil typically uses a “sandwich-style” laminated construction:
| Layer | Main Material | Functional Description |
| Inner (Contact) Layer | PVC, OPA, PP, etc. | Provides formability, protects the contents |
| Middle Layer | Aluminum Foil | 100% barrier to oxygen, water vapor, and light |
| Outer Layer | OPA (Nylon) | Enhances tear and puncture resistance, improves mechanical strength |
Physical Properties
Water Vapor Transmission Rate: ≤ 0.5 g / (m²·24 h)
Oxygen Transmission Rate: ≤ 0.5 cm³ / (m²·24 h·0.1 MPa)
Tear Strength:
OPA/AL ≥ 8.0 N / 15 mm
AL/PVC ≥ 7.0 N / 15 mm
Heat Seal Strength: ≥ 8.0 N / 15 mm
Why Choose Cold Forming Foil?
1. 100% Barrier Performance
Effectively blocks oxygen, moisture, and UV light to prevent drug degradation.
2. Deep-Draw Formability
Accommodates complex shapes and large-capacity single cavities.
3. Production-Friendly
Compatible with mainstream cold forming blister packaging lines.
4. Premium Appearance
Bright, metallic finish enhances product image and perceived value.
Typical Applications for Cold Forming Aluminum Foil
1. Pharmaceutical Packaging (PTP Foil / Cold Forming Laminated Film):
Primarily used for tablets, capsules, and other highly sensitive oral medications.
2. Blister Packaging:
Provides strong, attractive, and secure packaging solutions.
3. Moisture- and Oxygen-Sensitive Products:
Ideal for light-sensitive or hygroscopic pharmaceuticals.
Cold-Form Blister Aluminum Surface Quality
Surface Finish: Must be clean, smooth, free of wrinkles, scratches, oil stains, and other defects.
Pinholes: For pharmaceutical or high-barrier packaging, strict limits apply to pinhole size and count. For example, pharmaceutical aluminum foil typically requires pinhole diameters ≤ 0.3 mm with specified limits on the number per square meter.