Heat-sealable aluminum foil, used as a sealing material for yogurt cups, has evolved from a simple sealing function into a multi-functional, technology-integrated packaging solution. According to industry data, more than 75% of cup yogurt products use heat-sealable aluminum foil lids, and this figure exceeds 90% in premium product lines.

Yogurt lid foil is typically a multi-layer laminated material. It is mainly produced from 8011 or 8021 aluminum alloy in O temper (soft state). To ensure a tight, leak-free seal with yogurt cups commonly made of PP, PS, or PET, the foil is coated with a special heat-seal lacquer or laminated with a polymer film.

Structure and Characteristics of Yogurt Lid Aluminum Foil

Printing Layer

The outer printing layer is the first point of contact between the brand and the consumer. Using food-grade inks and environmentally friendly coating technologies, it provides vivid and durable visual effects while displaying brand logos, product information, nutritional facts, and usage instructions.

Aluminum Foil Layer

The middle aluminum foil layer typically uses food-grade aluminum foil with a thickness of 0.006-0.009 mm. This range offers an optimal balance between excellent barrier performance and material economy. The aluminum purity exceeds 99.5%, ensuring no risk of heavy metal migration.

Heat-Seal Layer

The inner heat-seal layer is usually composed of modified polypropylene (PP) or polyethylene (PE). Under specific temperature (typically 120–160°C) and pressure conditions, it forms a strong and reliable seal with PP/PS yogurt cup rims.

Adhesive and Functional Layers

Between the aluminum foil layer and the heat-seal layer, adhesive and functional layers are applied. Some high-end products incorporate high-barrier coatings, reducing oxygen transmission rates to below 1 cc/m²/day, significantly extending the shelf life of yogurts containing active probiotics.

Technical Parameters of Yogurt Lid Aluminum Foil

Key Features of Aluminum Foil for Yogurt Lids

1.High Barrier Performance: Effectively blocks light, oxygen, and moisture, extending shelf life and preserving flavor.

2.Excellent Heat-Sealability: Heat-resistant and capable of forming strong, airtight seals with plastic cups.

3.Safety and Hygiene: Meets food-grade standards, non-toxic, odorless, clean surface, suitable for high-temperature sterilization.

4.Easy-Open Function: Designed to provide a convenient, clean "easy-peel" opening experience for consumers.

5.High Temperature Resistance: Withstands yogurt pasteurization processes (typically up to 120°C) without deformation or harmful substance release.

6.Recyclability: Aluminum is infinitely recyclable, making it a more sustainable option than complex multi-layer plastic films.

Customized Production of Dairy Lid Foil

As a professional aluminum cap stock manufacturer, we offer a wide range of functional and aesthetic customization options:

• Embossed Foil and Plain Foil: Embossed patterns (worm or dot designs) help prevent lids from sticking together in automatic dispensing machines.

• Die-Cut Lids and Roll Stock: Pre-cut lids for manual or semi-automatic lines, and large rolls for high-speed continuous filling lines.

• Metallic Finishes: From classic silver to premium gold or customized matte finishes, helping your products stand out on supermarket shelves.