8011 8079 1235 Aluminum foil for yogurt packaging

Aluminum foil for yogurt packaging is primarily used for cup lid sealing, with the core material being a specific grade of aluminum foil substrate (especially 8011-O alloy).

The core of yogurt foil is 8011-O alloy, which ensures yogurt quality through its barrier properties, heat sealing capability, and safety performance.

Aluminum foil is a key material in yogurt packaging, particularly suitable for sealing single-serve yogurt cups. Its unique properties ensure product freshness, safety, and convenience.

• Material Structure: Yogurt packaging typically uses multilayer composite materials, with aluminum foil as the core barrier layer, an outer printed layer (such as PET/paper), and an inner heat-sealing layer (such as PP/PE).
• Common Forms: Cup lids (e.g., probiotic yogurt), inner layers of Tetra Pak cartons, sealing films of pouch yogurts, etc.
• Core Function: Protect yogurt from light, oxygen, moisture, and microbial contamination, extending shelf life.

Why Choose Aluminum Foil for Yogurt Packaging?

Protective Barrier

Aluminum foil serves as a robust barrier, blocking oxygen, moisture, light, and contaminants. This barrier is crucial for preserving the freshness, taste, and nutritional value of yogurt throughout its shelf life. By preventing the ingress of oxygen and moisture, aluminum foil significantly reduces the risks of spoilage, bacterial growth, and flavor degradation.

Secure Sealing Mechanism

Yogurt lids typically use aluminum foil coated with heat-sealing lacquer on one side. Upon heating and pressing, this lacquer adheres to the rim of the yogurt cup, forming a seal that prevents leakage and contamination. The aluminum foil used usually has a thickness of 30–40 mm and can be customized according to specific requirements of yogurt manufacturers.

Basic Information on Yogurt Aluminum Foil Packaging

Yogurt Lid Material Structure

Material Composition and Structure

Main alloys: The most commonly used alloy is 8011-O (soft alloy), but alternatives such as 8021, 8079, and 1235 can also be used depending on specific requirements.

Yogurt lid films are typically made from composite materials, structured as polyester/aluminum foil/heat-seal layer (PET/AL/PE·EVA). This structure ensures packaging performance while providing convenience for consumers.

Composite Structure: Yogurt lid foil is typically a multi-layer material consisting of the following components:

• Polyester (PET): Provides strength and durability.
• Aluminum Foil (AL): Ensures good gas barrier properties to prevent contamination and leakage.
• Heat Seal Layer (PE·EVA/PP/PS): Used to bond with the surface of the yogurt cup, creating a strong seal.

Applications of Aluminum Foil in Yogurt Packaging

• Cup Lid Sealing: Covers plastic cup openings and is sealed through heat pressing to prevent oxygen ingress and yogurt leakage.
• Composite Cartons: Used in Tetra Pak packaging (e.g., gable-top boxes), with aluminum foil sandwiched between paper and plastic layers for barrier protection.
• Pouch Sealing: The sealing strips of stand-up pouches or stick packs contain aluminum foil layers.

Advantages:

• Lightweight, reducing transportation costs.
• High compatibility, easily combined with plastic/paper.
• Suitable for high-temperature sterilization.

Physical and Chemical Properties of Aluminum Foil Packaging

Thickness Range of Aluminum Foil

Common thickness: 6–7 μm (microns), approximately 1/10 the diameter of a human hair.

Selection Criteria:

• 6 μm: For economical packaging (e.g., short shelf-life products).
• 7–9 μm: For high barrier requirements (e.g., long shelf-life, high-fat yogurt).

Key Limitations:

• Too thin (<6 μm) tends to generate pinholes, reducing barrier performance.
• Too thick (>9 μm) increases cost and reduces flexibility.

Industry Standard: Yogurt cup lid aluminum foil is mostly 6.3–6.5 μm, while composite carton foil is about 6.5–7 μm.

Barrier Properties of Aluminum Foil

Yogurt Packaging Aluminum Foil Specifications

Primarily uses 8011-O aluminum foil (annealed state), with a small amount of 8079 aluminum foil; O temper offers excellent ductility and softness, facilitating forming and processing.

• Thickness range: Usually 25–50 microns (0.025–0.050 mm), with 30–40 microns being the most common for yogurt lids. This thickness balances flexibility and puncture resistance.
• Alloy composition: Common alloys include 8011, 8021, 8079, and 1235, selected for their formability and corrosion resistance.

Multilayer Structure: Combines aluminum with polymer coatings:

• Heat sealing layer: PP (polypropylene), PS (polystyrene), or PE (polyethylene) coating/film
• Example: Aluminum/PP, Aluminum/PS, or PET/Aluminum/PP laminates.
• Coating: Cup-facing side uses heat-seal lacquer (colorless or white), enabling airtight sealing at 180–250°C. Consumer-facing side can be embossed or printed.

Advantages of Yogurt Aluminum Foil Packaging

• Safe and hygienic, compliant with health standards
• Eco-friendly, green packaging
• Excellent sealing, prevents oxidation and spoilage
• Bright colors, enhances product value
• Recyclable, meets green packaging standards
• Supports color printing, improves product recognition
• Convenient to use, tightly sealed yet easy to tear, enhancing consumer experience

Barrier Protection

• Oxygen/Moisture Barrier: Provides 100% barrier against moisture, oxygen, and volatile compounds, preventing yogurt dehydration and oxidation.
• Light Protection: Opaque aluminum foil blocks ultraviolet and visible light, suppressing photo-oxidation and preventing vitamin degradation and rancidity.
• Microbial Contamination Prevention: Sterile surface and airtight sealing minimize bacterial intrusion; compared to permeable materials, shelf life can be extended by 30–50%.

Sealing Performance

• Heat Seal Integrity: Specialized coatings form a permanent bond with PP/PS cups under high temperature and pressure (e.g., induction sealing), creating a leak-proof seal suitable for transportation.
• Peelable Technology: Carefully designed "easy-peel" coatings enable clean, residue-free removal, while "hard-to-peel" coatings enhance tamper resistance.

Aluminum Foil Material Selection for Yogurt Packaging

• Aluminum Foil Specifications: Typically, 30-45 gauge aluminum foil is used, with one side coated with a heat seal lacquer. The heat seal lacquer bonds with the yogurt cup surface when heated and pressed, creating a strong seal.
• Film Embossing: The surface of the aluminum foil can be embossed to meet various packaging needs. Aluminum foil lids can be used to seal cups made from materials such as PP, PS, and PE.

Haomei Yogurt Packaging Aluminum Foil Specifications

• Thickness: Ranges from 20–50 microns (0.02–0.05 mm), balancing protection and ease of opening. Thicker foils (e.g., 50 microns) enhance durability but may need adjustments for consumer convenience.
• Width: Customizable between 50–1600 mm, suitable for various cup sizes.

Coating:

• One side is coated with a heat-seal lacquer (e.g., PS, PP, or PET) for sealing.
• The reverse side is printed with a primer for brand identification.

Specifications and Uses: Aluminum foil used for yogurt packaging typically has the following specifications:

• Alloy: 8011, 8079
• Temper: O, H14, H16, H18, H19, H22, H24

These foils are widely used for sealing yogurt, cheese, juice, and beverage cups, effectively meeting the strict oxygen barrier requirements for yogurt packaging.

Yogurt Packaging Aluminum Foil Chemical Composition

Yogurt Packaging Aluminum Foil Mechanical Properties

Yogurt Lid Aluminum Foil Applications

• Primary Use: Sealing single-serving yogurt cups and multi-pack containers.
• Expanded Applications: Dairy desserts (puddings, custards), portable snacks, and even non-food items such as cosmetics.

Aluminum foil plays a critical role in yogurt packaging by effectively blocking external factors, ensuring product quality, and providing consumer-friendly functionality.

• ‌Mainstream Packaging Formats‌: Used for yogurt cup lids, milk cap foils, etc., with continuously growing demand.
• ‌Extended Applications‌: Fields requiring high-barrier packaging such as juice and dairy products.
• Specific Packaging Formats for Dairy Products: Single-serve cups, multi-pack yogurts, and drinkable yogurt bottles.
• Beyond Yogurt: Cheese lids, dessert cups, probiotic supplements.

Compliance with Global Standards: Certified by FDA, EU 10/2011, ISO 9001, and SGS, safe for direct food contact.

With its unparalleled barrier properties, production efficiency, and sustainability, aluminum foil remains the best solution for yogurt packaging. Continuous innovation in coating technology and recycling infrastructure will further strengthen its position in the evolving dairy packaging sector.

Scope of Use: Yogurt lid films are widely used for sealing yogurt, cheese, juice, and beverage cups. Due to the high fat and protein content in yogurt, there are stringent requirements for the oxygen barrier properties of the packaging material. Aluminum foil composite lid films meet these requirements effectively.

The aluminum foil composite material used in yogurt lid films not only provides excellent sealing and barrier properties but also ensures ease of opening, maintaining the quality of the yogurt product and enhancing the consumer experience.

Haomei Yogurt Packaging Aluminum Foil Advantages

High-Quality Raw Materials

Few Holes: Haomei's 8011-O aluminum foil is precision-manufactured to ensure minimal surface holes, reducing the risk of gas and liquid permeability.

Food-Grade Safety

Oil Removal: Our aluminum foil undergoes thorough oil removal during production to ensure a clean, contaminant-free surface, meeting food-grade safety standards.

High-Temperature Tolerance: The foil can withstand high temperatures of 121°C-125°C during cooking without affecting the performance of the base material, ensuring safety and stability during food processing.

Environmental and Hygiene Standards

Compliance with National Standards: Our 8011-O aluminum foil meets national environmental and food safety technical requirements, ensuring hygiene and safety during use.

Ease of Opening: The aluminum foil lid films have excellent ease of opening properties. Even after high-temperature treatment, the sealing surface remains residue-free, ensuring product integrity and hygiene.

User Feedback

Positive Reputation: Based on user feedback, our 8011-O aluminum foil performs excellently when made into yogurt lid films, meeting various application needs with competitive pricing.

Yogurt Aluminum Foil Packaging Production Process

• Cutting, printing, forming, and lamination steps
• Precise control ensures performance and quality
• Production process affects aluminum foil properties

Yogurt Aluminum Foil Packaging Quality Inspection Standards

‌Physical Testing‌: Thickness uniformity, tensile strength, and seal strength (in accordance with GB/T 2790 standard)

‌Seal Integrity Verification‌:

Retort Test: After sealing at 160℃ under 6kg pressure, boil in water for 1 hour to check for leakage or deformation

Gas/Water Vapor Permeability Testing

‌Appearance Inspection‌: Print clarity, no smudging or color deviation