Aluminum foil is one of the most commonly used sealing materials for yogurt, thanks to its excellent barrier properties, heat-sealing performance, and printability. It has become the preferred solution for yogurt manufacturers worldwide. MC Aluminum produces yogurt lid aluminum foil that provides a perfect seal while remaining easy to open.

Why Aluminum Foil is Preferred Over Plastic Film

Unlike ordinary plastic films, which contain microscopic pores that allow slow permeation of oxygen and water vapor, aluminum foil has a dense metallic structure that completely blocks external elements. This ensures that yogurt retains its original flavor and probiotic activity throughout its shelf life.

In addition to its high barrier properties, aluminum foil also has the advantages of being non-toxic and odorless, resistant to high-temperature cooking (up to 121°C or higher), and having a clean surface that does not easily breed bacteria, fully meeting the stringent hygiene standards for food packaging.

Material for Yogurt Sealing Foil

Yogurt sealing aluminum foil is made from soft (O-temper) aluminum alloys, mainly from the 8000 series, which provide excellent formability, puncture resistance, and food safety.

• 8011 Alloy: Most commonly used. Offers high tensile strength and good formability for high-speed die-cutting and stamping. Cost-effective while maintaining excellent barrier performance.

• 8079 Alloy: Selected when higher flexibility, thinner gauges, or superior overall barrier performance is required.

Structure of Yogurt Lid Foil

Yogurt lid foil is not a single aluminum sheet but a carefully engineered multilayer composite system. The most common structure is three layers: PET / AL / heat-seal layer (PE or EVA).

• PET layer: Provides mechanical strength and a printable surface for branding and artwork.

• Aluminum layer: Acts as the primary barrier against oxygen, moisture, and light.

• Heat-seal layer: Melts upon heating to bond securely with the yogurt cup.

Why Use Aluminum Foil for Yogurt Sealing?

High Barrier Performance:
Effectively blocks moisture, oxygen, light, and odors, keeping yogurt fresh and extending shelf life.

Excellent Heat-Seal Performance:
Heat-seal layer is uniformly coated, with a wide sealing temperature range (180–240°C), ensuring a leak-proof seal.

High-Temperature Resistance:
Can withstand pasteurization and sterilization, ensuring food safety.

Easy Opening:
Foil peels cleanly along the pre-defined release layer without leaving residue or tearing unevenly.

Food Safety Compliance:
Meets FDA, ISO, and SGS standards, ensuring safe consumption.

Attractive Appearance:
Surface is highly printable, compatible with gravure and flexographic printing, enhancing brand appeal.

Eco-Friendly:
Aluminum is 100% recyclable, making it an environmentally friendly choice.

Specifications for Yogurt Sealing Aluminum Foil

Production Process for Yogurt Sealing Foil

1.Rolling aluminum foil from 8011/8079 O-temper alloys

2.Surface coating treatment

3.Heat-seal adhesive coating

4.Drying and curing

5.Slitting and inspection

6.Roll or sheet packaging

Comparison with Other Sealing Materials

In the packaging industry, besides aluminum foil, there are other alternatives for sealing yogurt (such as PE/PP plastic film and paper-based composite materials). The following comparison shows that aluminum foil's irreplaceability mainly lies in its preservation capabilities.