Flexible packaging materials are typically composed of a combination of various substrates to achieve effective packaging for specific products. Aluminum foil plays a crucial role in flexible packaging due to its superior barrier properties. It can effectively block out light, moisture, and air, thereby protecting the quality and freshness of the packaged contents.
Flexible Packaging Materials
Combination of aluminum foil with other substrates: Aluminum foil is often combined with substrates such as polyethylene terephthalate (PET), polyethylene (PE), polyamide (PA), polypropylene (PP), paper, and cardboard. These substrates can be lacquered (used for blister packs, chocolate, cheese) or printed (used for chocolate wrappers, butter wrappers).
Thickness range: Haomei offers aluminum foil with a thickness range of 8µm to 150µm to meet different packaging needs.
Features of Flexible Packaging Aluminium Foil
1. Gas Barrier: Aluminum foil effectively blocks oxygen, air, and other gases, preventing the oxidation or deterioration of the packaged contents.
- 2. Water Vapor Barrier: Aluminum foil can block water vapor, keeping the packaged contents dry.
- 3. Light Barrier: Aluminum foil blocks light, preventing damage to the contents caused by exposure to light.
- 4. Mechanical Performance and Structural Rigidity: Aluminum foil provides the necessary mechanical performance and structural rigidity to maintain the shape and stability of the packaging (e.g., maintaining folds).
Specifications for Flexible Packaging Aluminium Foil
- 1) Grade: 8011, 8079, 1235, etc.
- 2) Thickness: 0.006mm-0.009mm
- 3) Width: Up to 1850mm
- 4) Inner Diameter: 3 inches to 6 inches
- 5) Temper: O soft
| Commodity | Alloy | Temper | Thickness (mm) | Width (mm) | Coil ID (mm) |
| Aluminum flexible packing foil | 8079 | O | 0.0055-0.009 | 200-1500 | 76/152 |
| 1235 | O | 0.0055-0.009 | 200-1500 | 76/152 |
Selection of Aluminium Alloys for Flexible Packaging
Commonly used aluminium alloys for flexible packaging mainly include the 1000 series and 8000 series, designed to meet various application needs. These alloys offer excellent formability and adaptability, fulfilling diverse performance requirements in flexible packaging.
Flexible Packaging Aluminium Foil 8011
- Features: 8011 aluminium foil has excellent formability, toughness, and barrier properties. Its strength and stability make it suitable for a wide range of flexible packaging applications, including food and beverage packaging. 8011 aluminium foil is especially suited for packaging that requires good moisture, gas, and light barrier properties.
- Applications: Commonly used in food packaging, pharmaceutical packaging, and other flexible packaging fields that require high barrier properties.
Flexible Packaging Aluminium Foil 8079
- Features: 8079 aluminium foil has excellent ductility and tear resistance while maintaining good barrier properties. It is particularly suitable for flexible packaging applications that require higher mechanical performance.
- Applications: Widely used in pharmaceutical packaging, food packaging, cigarette packaging, and other areas that demand high strength and good barrier properties.
Flexible Packaging Aluminium Foil 1235
- Features: 1235 aluminium foil offers exceptional flexibility and formability, making it suitable for applications requiring high printing performance. Its barrier properties are slightly less than those of 8011 and 8079, but it still effectively blocks moisture and air.
- Applications: Mainly used in food packaging, candy packaging, and some flexible packaging fields that require high-quality printing.
8011 aluminium foil is ideal for high barrier requirements, 8079 aluminium foil for high mechanical strength needs, and 1235 aluminium foil for applications requiring excellent printing performance.
Flexible Packaging Aluminium Foil Chemical Composition
| Elements | Composition /% | ||
| 1235 | 8011 | 8079 | |
| Si | 0-0.65 | 0.50-0.90 | 0.05-0.30 |
| Fe | 0-0.65 | 0.60-1 | 0.70-1.30 |
| Cu | 0-0.05 | 0-0.10 | 0-0.05 |
| Mn | 0-0.05 | 0-0.20 | - |
| Mg | 0-0.05 | 0-0.05 | - |
| Cr | - | 0.05 | - |
| Zn | 0-0.1 | 0-0.10 | 0-0.10 |
| Ti | 0-0.06 | 0-0.08 | - |
| V | 0-0.05 | - | - |
| Al | Rem | Rem | Rem |
Mechanical Properties of Flexible Packaging Aluminium Foil
| Alloy | Temper | Thickness /mm | Tensile strength /MPa | elongation after break /%, (not less than) | |
| A50mm | A100mm | ||||
| 1235 | O | 0.0060 - 0.0090 | 45-95 | 0.5 | |
| 8011 8079 | 50-105 | 1.0 | |||
Applications of Flexible Packaging Aluminium Foil
Food and Beverage Packaging
Wine Bottle Packaging
Use: Aluminium foil caps for wine bottle necks to ensure the seal and safety of the contents.
Advantages: Prevents liquid leakage and maintains the quality and flavor of the wine.
Food Packaging
Use: Packaging for foods such as chocolate and cheese.
Advantages: Preserves freshness and flavor, blocking air and moisture.
Candy Packaging
Use: Packaging for various candies.
Advantages: Maintains the freshness of the candy and prevents spoilage.
Butter Packaging
Use: Packaging for butter.
Advantages: Moisture and light resistance, preserving the quality and taste of butter.
Food Container Aluminium Foil
Use: Aluminium foil for sealing food containers.
Advantages: Provides excellent barrier properties, protecting the taste and texture of the food.
Household Aluminium Foil
Use: Multipurpose aluminium foil for household kitchens.
Advantages: Used for cooking, storing, and wrapping food.
Pharmaceutical Packaging
Pharmaceuticals
Use: Packaging and sealing for pharmaceuticals.
Advantages: Protects medicines from moisture, light, and contaminants.
Retort Pouches
Use: Retort pouches for food and pharmaceutical packaging.
Advantages: Resistant to high temperatures and provides barrier properties suitable for high-temperature processing.
Electrical Field
Cables
Use: Insulation and shielding for cables and motors.
Advantages: Provides excellent dielectric performance and electromagnetic shielding.
Capacitor Manufacturing
Use: Manufacturing of capacitors.
Advantages: Provides necessary electrical insulation and stability.
Transformers
Use: Insulation and shielding for transformers.
Advantages: Protects transformers from external electromagnetic interference.
Construction and Insulation
Insulation and Waterproofing
Use: Insulation and waterproofing treatment for panels, asphalt membranes, rock wool, cork, double glazing, and other materials.
Advantages: Provides excellent insulation and waterproofing properties, enhancing the energy efficiency and durability of buildings.
Other Packaging Applications
Cigarette Foil
Use: Packaging for cigarettes.
Advantages: Moisture and oxidation resistance, maintaining the freshness of cigarettes.
Composite Flexible Packaging
Use: Flexible packaging for various composite materials.
Advantages: Combines the benefits of aluminium foil with other materials, enhancing the overall performance of the packaging.
Aluminium foil in these applications is typically combined with materials like plastic and paper to enhance its physical strength and suitability.