In the dairy packaging industry, yogurt lids not only provide sealing and barrier functions but also directly affect shelf life, opening experience, and food safety. From the perspective of an aluminum foil manufacturer, our long-term supply experience in flexible packaging foils shows that 1235 aluminum foil, with its high purity, excellent ductility, and stable lamination performance, has become one of the most widely used base materials for flexible yogurt lid structures.

Material Characteristics of 1235 Aluminum Foil

1235 aluminum foil belongs to the commercially pure aluminum series, with an aluminum content of not less than 99.35%. Strict control of iron, silicon, and other elements ensures excellent ductility and flexibility, allowing the material to meet the requirements of high-speed packaging lines.

Why Choose 1235 Aluminum Foil?

1.Excellent corrosion resistance:
The alloying effect of magnesium and manganese significantly improves resistance to moisture, oxygen, and organic acids, ensuring long-term freshness of yogurt lids.

2.High strength and ductility:
Through alloy design and cooling processes, 1235 aluminum foil achieves approximately 15% higher strength while maintaining flexibility, meeting the requirements for repeated opening and handling of lids.

3.Good formability:
Easily processed by stamping, rolling, and other forming methods to create complex lid structures, such as anti-counterfeiting patterns, vent holes, or tear-resistant designs.

4.High surface smoothness:
Well suited for printing and coating, enhancing the visual branding value of yogurt lids.

Typical Structures of 1235 Aluminum Foil in Flexible Yogurt Lids

Based on aluminum foil manufacturer supply practices, 1235 aluminum foil is commonly used in the following structures:

• PET / AL / heat-seal layer

• Paper / AL / PE

• OPP / AL / heat-seal coating

Typical foil thickness range: 0.018 - 0.025 mm

Performance Advantages of Aluminum Foil for Yogurt Lids

1.Freshness preservation:
The high gas barrier properties of 1235 aluminum foil effectively block oxygen and moisture, extending the shelf life of yogurt.

2.Tear resistance:
With a tensile strength of 180-210 MPa, significantly higher than that of standard aluminum foil (around 150 MPa), 1235 aluminum foil maintains integrity even in low-temperature environments.

3.Excellent sealing performance:
Outstanding heat-seal properties allow tight adhesion to the cup rim (water brushing test up to Grade A), preventing leakage.

4.Safety:
Non-toxic and harmless, compliant with food-contact material requirements.

5.Recyclability:
Aluminum is 100% recyclable, with a recycling rate exceeding 95%, supporting sustainable packaging.

Technical Specifications of Yogurt Lid Aluminum Foil

Comparison with Other Aluminum Foil Grades