In the dairy packaging industry, yogurt lid aluminum foil plays a critical role not only in sealing, protection, and preservation, but also in influencing production efficiency, consumer experience, and brand image.
As one of the most mature and widely used materials for yogurt lids, 8011 O temper aluminum foil is extensively applied in yogurt cup sealing structures due to its excellent ductility, reliable sealing performance, and stable compatibility with lamination and heat-sealing processes.

Why Choose 8011 O Aluminum Foil?

The 8011 aluminum alloy belongs to the Al-Fe-Si alloy series. Its carefully balanced trace-element composition provides outstanding formability, corrosion resistance, and exceptional barrier properties. Compared with other aluminum foil grades, 8011 alloy combines high flexibility with sufficient strength and appropriate hardness, making it a true "all-round performer" in food packaging applications.

The "O temper" (fully annealed state) is the essence of its performance. Through precisely controlled annealing, the internal grain structure is fully recrystallized, eliminating work hardening and achieving optimal softness, elongation, and plasticity.
This allows the foil to fit tightly to cup rims, perform reliably on high-speed filling lines, and deliver a smooth, easy-peel opening experience for consumers.

The 0.04-0.09mm thickness range provides an ideal balance for heat sealing onto plastic cups such as PS, PP, PE, and PVC, ensuring both sealing integrity and ease of opening.

Typical Yogurt Lid Foil Structures

8011 O aluminum foil + heat-sealing lacquer

8011 O aluminum foil / PE laminated

8011 O aluminum foil / PET / PE multilayer laminate

Printed aluminum foil + heat-sealing layer

The sealing structure can be customized according to the yogurt cup material (PS, PP, PET).

Key Advantages of 8011 Aluminum Foil for Yogurt Lids

1. Absolute Barrier - Locks in Freshness

Aluminum foil provides an almost perfect barrier: 100% light-proof, oxygen-proof, moisture-proof, and bacteria-resistant.
This protects active cultures (such as lactic acid bacteria and probiotics), preserves flavor compounds, prevents nutrient degradation, and effectively extends shelf life.

2. Reliable Sealing - Zero Leakage

Excellent ductility enables tight heat sealing with various cup materials (PS, PP, paperboard, etc.).
Even during cold-chain transportation and vibration, leakage is effectively prevented, safeguarding brand reputation and consumer confidence.

3. Smooth & Safe Opening Experience

The softness of O temper foil ensures easy peeling with clean, burr-free edges. Combined with precise easy-peel line design, it delivers a user-friendly opening experience suitable for all age groups.
The chemical inertness of aluminum foil guarantees food-contact safety.

4. High-Efficiency Production - Optimized for Speed

Jumbo rolls and superior mechanical properties allow seamless operation on high-speed filling and sealing machines, reaching tens of thousands of cups per hour.
Uniform thickness, stable web running, and fast heat-seal response significantly improve production efficiency.

5. Premium Printing Surface - Enhances Brand Value

With its metallic luster and premium appearance, aluminum foil is an excellent substrate for printing.
It supports vivid graphics, brand logos, and product information, acting as a powerful "silent salesman" on retail shelves.

6. Recyclable & Sustainable

Aluminum is infinitely recyclable, requiring only about 5% of the energy used in primary aluminum production.
Using aluminum foil lids aligns with global sustainability trends and meets growing consumer demand for environmentally responsible packaging.

8011 Yogurt Lid Foil – Technical Specifications

Core Quality Standards for 8011 O Yogurt Lid Foil

1. Surface Quality

Degreasing Level (Wettability): Must meet Grade A water-brush test requirements. Residual oil can cause coating adhesion failure or uneven printing.

Cleanliness: Smooth surface, free from bright spots, black streaks, scratches, and wrinkles.

Edge & Coil Quality: Neat coil edges without burrs, telescoping, or layer slippage, ensuring smooth unwinding during slitting and coating.

2. Pinhole Control

For 0.04-0.09mm thickness, 8011 aluminum foil should achieve zero or ultra-low pinhole levels.
Excessive pinholes may allow oxygen ingress, leading to probiotic degradation, spoilage, mold growth, or cup swelling.

3. Mechanical Properties

Tensile Strength: Typically 80-110 MPa
(Too low may cause tearing during sealing; too high may reduce peelability.)

Elongation: ≥15%
Ensures crack-free performance during embossing and lid stamping.

4. Geometric Precision

Thickness Tolerance: Ideally controlled within ±3%
Uneven thickness can cause inconsistent sealing pressure and incomplete seals.

Flatness: No significant waviness or buckling, ensuring smooth operation on high-speed automated lid production lines.

As a professional aluminum lid material manufacturer, MC Aluminum supplies 8011 O aluminum foil in jumbo rolls for large-scale yogurt lid production.
Jumbo roll supply significantly reduces roll-change frequency on filling lines, improves production efficiency, minimizes splice losses, and ensures consistency in printing and coating quality.