8021 Aluminum Foil in Yogurt Lid Applications

Updated : Dec. 21, 2023
Table of Contents
  1. Learn about Yogurt Lid 8021 Aluminum Foil
  2. Yogurt cover 8021 aluminum foil specifications
  3. Yogurt Lid 8021 Aluminum Foil Mechanical Properties
  4. Why choose 8021 aluminum foil for yogurt lid?
  5. 8021 aluminum foil production process
  6. Conclusion

In the world of packaging materials, aluminum foil has become a versatile and reliable choice, providing countless benefits to various industries. One particular application that highlights the excellent properties of aluminum foil is its use in yogurt lids.

Among the many aluminum foil alloys available, 8021 aluminum alloy stands out for its unique combination of properties, making it ideal for yogurt lid production.

8021 Aluminum Foil

Learn about Yogurt Lid 8021 Aluminum Foil

The yogurt cover film is mainly made of composite materials, and its structure is polyester/aluminum foil/heat sealing layer (PET/AL/PE·EVA).

  • 8021 aluminum alloy is mainly composed of aluminum and also contains trace elements such as iron and silicon.
  • Notable properties include excellent tensile strength, formability and corrosion resistance.
  • Its high flexibility and consistency make it suitable for the complex shapes and sizes required for yogurt lids.

8021 aluminum foil plays a vital role in maintaining the freshness and quality of your products.

Yogurt cover 8021 aluminum foil specifications

8021 aluminum foil has no effect on the base film after being steamed at high temperatures of 121°C-125°C, and has excellent ease-of-use effect with no residue on the sealing surface.

Parameter Specification
Typical Alloy 8021 Aluminum Foil
Material State O (Annealed)
Thickness (mm) 0.006-0.5
Width (mm) 100-1600
Length (mm) C (Coil)
Typical Products Yogurt lid, food packaging, beverage sealing

Haomei Aluminum is a large manufacturer of aluminum foil substrates. It can undertake 3-2000 tons of 8021/8011/8079 aluminum foil for yogurt lids. The price is competitive and it is widely used in cup yogurt, cup milk tea, cup instant noodles, cup jelly, etc. Cup food container sealing film, welcome to buy.

Yogurt cover 8021 aluminum foil

Yogurt Lid 8021 Aluminum Foil Mechanical Properties

The mechanical properties of 8021 aluminum foil are a key factor in its suitability for yogurt lid applications.

With a tensile strength of 70 to 140 MPa and an elongation at break of at least 2%, the foil is able to withstand the rigors of the packaging process while maintaining its structural integrity.

These mechanical properties are crucial to ensure that the foil seals correctly to the yogurt container, providing an effective barrier against external factors.

Why choose 8021 aluminum foil for yogurt lid?

The sealing performance of aluminum foil is better than that of pure plastic. The plastic material has many small holes visible under a magnifying glass through which air and water can pass.

The yogurt aluminum foil lid composite film has high strength.

Yogurt is usually heat sealed. The effect is that the aluminum foil is more resistant to high temperatures and has a better sealing effect.

1. Barrier performance

One of the main reasons why 8021 aluminum foil is widely used in yogurt lidding applications is its excellent barrier properties. The foil acts as a protective barrier, keeping contaminants out and preserving the freshness of the yogurt. Its moisture-, gas- and light-proof properties ensure that the yogurt inside the container remains free of contamination and maintains its quality throughout its shelf life.

2. Heat sealability

The heat sealability of 8021 aluminum foil is a key attribute of yogurt packaging. The foil must form a strong and airtight seal with the container to preserve the freshness of the yogurt and prevent leaks. The unique combination of mechanical and thermal properties of 8021 aluminum foil makes it ideal for heat sealing applications, providing a reliable seal that can withstand temperature changes during transportation and storage.

3. Printability and branding

In addition to its functional properties, 8021 aluminum foil offers excellent printability. This feature allows manufacturers to integrate branding, nutritional information and other important details directly onto the yogurt lid. The ability to print high-quality graphics enhances the visual appeal of the product, helps increase brand recognition, and provides consumers with valuable information about the yogurt they purchase.

8021 aluminum foil production process

1. Casting and rolling

The production of 8021 aluminum foil usually starts with the casting of aluminum ingots. These ingots undergo a series of rolling processes to achieve the required thickness and size. The rolling process not only shapes the foil, but also refines its microstructure and improves its mechanical properties.

2. Annealing

After the initial rolling, the foil needs to be annealed. Annealing involves heating aluminum to a specific temperature and then slowly cooling it. This step is essential to eliminate internal stresses, improve the formability of the foil, and improve its surface finish. The annealing process plays an important role in the overall quality of the aluminum foil, ensuring it meets the stringent requirements of yogurt lid applications.

3. Surface treatment

To further enhance the performance of the foil, it is surface treated to obtain specific properties. Surface treatments can include coatings or laminations designed to improve heat sealability, printability and overall barrier properties. These treatments help the foil protect the yogurt from external elements such as moisture, light and air.


In conclusion, 8021 aluminum foil is an excellent material in the field of food packaging, especially in the production of yogurt lids. Its unique combination of mechanical strength, barrier properties, heat sealability and printability make it an ideal choice.

Related Topics: food packing bottle caps Aluminium bottle cap packaging Aluminum

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