Soft packaging Aluminium foil for Snack
Aluminium foil is widely recognized as an essential material for the packaging industry, specially designed for preserving the freshness, aroma, and quality of food products.
Soft packaging aluminium foil is a thin sheet of pure aluminum that is processed to be soft and pliable, ideal for on-the-go snack packaging requirements. Its combination of excellent barrier properties, flexibility, and printability make it the first choice for manufacturers looking to package snacks such as chips, nuts, candies, and biscuits while maintaining product integrity and enhancing shelf life.
Features
| Feature | Description |
|---|---|
| Barrier Protection | Provides superior moisture, oxygen, and light barrier to preserve snack freshness. |
| Softness and Flexibility | Highly pliable, allowing complex pouch designs without cracking or breaking. |
| Lightweight | Contributes minimal weight to packaging, reducing shipping costs. |
| Thermal Conductivity | Good heat sealing and extrusion lamination performance to package integrity. |
| Print Compatibility | Supports high-resolution printing for attractive branding and differentiation. |
| Non-toxic & Food Safe | Complies with strict food safety and health guidelines globally. |
Chemical Composition
The following table shows the typical chemical analysis of aluminium foil used in soft packaging for snacks:
| Element | Percentage (%) |
|---|---|
| Aluminium (Al) | ≥ 98.5 |
| Iron (Fe) | ≤ 0.40 |
| Silicon (Si) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.05 |
| Magnesium (Mg) | ≤ 0.05 |
| Manganese (Mn) | ≤ 0.05 |
| Zinc (Zn) | ≤ 0.03 |
| Other Impurities | ≤ 0.20 |
Note: These levels may have slight variations by manufacturer and specific alloy designation but generally reflect standard soft packaging grades like 1100 and 1235 series.
Technical Specifications
| Property | Unit | Typical Value | Test Method |
|---|---|---|---|
| Thickness | microns (μm) | 6 - 15 | Micrometer |
| Gauge Tolerance | % | ±5 | Internal Standard |
| Tensile Strength | N/mm² | 70 - 110 | ASTM E8 |
| Elongation at Break | % | 10 - 25 | ASTM E8 |
| Yield Strength | N/mm² | 40 -105 | ASTM E8 |
| Density | g/cm³ | 2.7 | ISO 3923 |
| Reflectivity | % | ≥ 95 | ASTM E429 |
| Oxygen Transmission Rate (OTR) | cc/m²/day | <1 at standard conditions | ASTM D3985 |
| Moisture Vapor Transmission Rate (MVTR) | g/m²/day | <0.05 | ASTM F1249 |
Applications in Snack Packaging
Soft packaging aluminium foil shines across multiple snack food applications:
| Snack Type | Application Benefits | Typical Packaging Format |
|---|---|---|
| Potato Chips & Crisps | Protects against oxygen and humidity preventing staleness and texture loss. | Pouches, Sachets |
| Confectionery | Maintains flavor integrity, prevents contamination from external odors. | Wrappers, Laminates |
| Nuts & Seeds | Prevents oxidation and rancidity through excellent barrier properties. | Multi-layer pouches |
| Biscuits & Cookies | Enhances stiffness of flexible pouches while maintaining product freshness. | Flow wrap, Stand-up pouches |
| Dehydrated Snacks | Blocks moisture ingress preserving crunch and shelf life. | Flexible laminates and pouches |
Advantages Over Other Packaging Materials
| Aluminium Foil | Plastic Films | Paper-based Packaging |
|---|---|---|
| Superior barrier to gases and moisture | Permeable to oxygen and moisture without metallization | Poor moisture and gas barrier |
| Fully recyclable and sustainable | Lower recyclability, often mixed materials | Biodegradable but limited barrier |
| Heat sealable for airtight packaging | Sealing can depend on plastic compatibility | Requires additional coatings |
| Can be laminated with specialty layers | Surface limitations for print and functional coatings | Surface print quality acceptable |
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