Aluminum foil is widely used to make a variety of containers because of its excellent physical and chemical properties. When selecting aluminum foil jumbo pack for making containers, factors such as the strength of the material, formability, corrosion resistance and cost are usually considered.
The following are some common specifications used to make containers:
- Alloy: Aluminum foil jumbo roll in 8011-H24 or 3003-H24 are suitable for making semi-rigid containers for food packaging.
– Alloy 8011: This alloy is commonly used in the manufacture of aluminum foils for food packaging, including household foils, pop up foil sheets and heat-sealable foils. It has good molding properties and can be stamped and formed into semi-rigid food containers.
– Alloy 3003: 3003 aluminum foil for food container is another commonly used material, especially in the production of lunch boxes and meal preparation containers. The advantages of this alloy lie in its safety and hygiene properties, high and low temperature resistance, greenness, regeneration and energy saving, and good sealing properties. In addition, it has outstanding barrier properties that can effectively prevent gas and moisture penetration, thus protecting the freshness of food.
- Annealing process: full hard (H18), semi-hard (H24) or soft state (O state), which affects the formability of aluminum foil.
- Thickness: Conventional range: 0.006mm (ultra-thin) to 0.2mm (thick foil)
Typical application:
0.006~0.01mm: lightweight containers such as chocolate liners and chewing gum wrappers.
0.02~0.06mm: food trays, fast food boxes.
0.1~0.2mm: Containers requiring higher strength (such as baking molds).
- Standard width range: 200mm~1600mm (non-standard width can be customized).
- Common roll weight: 500kg~5000kg/roll (depends on thickness and width). The weight of a single roll should be adapted to the carrying capacity of forklift or lifting equipment.
- Inside diameter (ID): 76mm (3 inches), 152mm (6 inches) is the mainstream standard.
- Outer diameter (OD): usually ≤ 1500mm, to avoid over-width during transportation.
- Packing: moisture-proof paper + winding film + wooden pallet, long-distance transportation needs to be installed with anti-collision corner guards.
Quality requirements of aluminum foil jumbo pack for making containers including:
- Surface quality
– Finish: no scratches, oil spots, oxidized spots, surface roughness Ra≤0.2μm (high glossy surface requirement).
– Pinhole control:
When the thickness is ≤0.02mm, the number of pinholes is ≤50/m²;
When the thickness > 0.02mm, it needs to be completely free of pinholes (to prevent leakage).
– Edge: Need to ensure that the edge is flat, no burrs, to prevent subsequent cracking when stamping and molding.
- Mechanical properties
– Tensile strength: 80~150MPa (lower strength for soft foil in annealed state, higher for hard foil).
– Elongation: ≥3% (to ensure that it is not easy to break when stamping and molding).
- Chemical properties
– Heavy metal migration: comply with FDA (USA) or EU 10/2011 (EU) standards for food contact materials.
– Corrosion resistance: Pass the salt spray test (e.g. 48 hours neutral salt spray without corrosion).
– Environmental protection certification: some customers require to pass RoHS, REACH and other harmful substances restriction directives.
- Oiling treatment
Whether oiling is required or not: Usually selected according to customer demand.
– Purpose of oiling:
Anti-oxidation: Prevent the surface of aluminum foil from oxidizing and blackening during storage.
Lubrication: Improve the coefficient of friction during stamping and molding to reduce die wear.
– Oil type:
Food grade mineral oil: meets FDA standards for food containers.
Synthetic lubricant: suitable for high temperature molding process.
Amount of oil applied: generally controlled at 5~20mg/m², excessive amount may lead to poor subsequent printing or laminating process.
With the above information, you can choose the suitable aluminum foil jumbo pack for making containers specification and we can quote for you at the first time.
