How to produce 8021 aluminum foil?

8021 aluminum foil is a very common aluminum foil in life, widely used in packaging, medicine, battery, and other industries.

The manufacturing process of 8021 aluminum foil

The manufacturing process of 8021 aluminum foil involves several steps, including casting, rolling, annealing, and slitting.

Casting

The first step in the manufacturing process is casting, which involves melting the aluminum alloy and casting it into large ingots.

Rolling

After the ingots have cooled, they are rolled into thin sheets using a hot rolling process. The sheets are then cold rolled to reduce their thickness further.

Annealing

The rolled sheets are then annealed to improve their ductility and formability. Annealing involves heating the sheets to a high temperature and then cooling them slowly.

Slitting

Finally, the annealed sheets are slit into smaller rolls of the desired width and length.

With its excellent barrier properties, flexibility, and heat resistance, 8021 aluminum foil is commonly used in packaging for products that require a high level of protection, as well as in the pharmaceutical and battery industries.