What is the difference between aluminum coil and aluminum foil?

Production of aluminum foil and aluminum coils

Aluminum foil and aluminum coils are both aluminum materials made from high-purity aluminum. Aluminum foil is a roll-shaped material with a certain thickness and flexibility that is made from large aluminum rolls through multiple processes such as cutting and annealing. Aluminum coils refer to materials rolled with a certain width and thickness, generally with a thickness greater than 0.2mm.

The difference between aluminum foil and aluminum coil

The main differences between aluminum foil and aluminum coils are size and purpose. Aluminum foil is usually thin, generally less than 0.2mm, and is generally expressed in the form of thickness (μm) × width (mm) × length (m). The national standard stipulates that the specification range of aluminum foil is 0.006mm~0.2mm thickness and 100mm~1650mm width .
Aluminum coils are thicker, generally larger than 0.2mm. The specifications of aluminum coils mainly range from 0.15mm to 5.0mm in thickness and 50mm to 2500mm in width. Aluminum foil is mainly used for packaging (food packaging, pharmaceutical packaging), while aluminum coils are mainly used in construction (decorative aluminum coils) and other fields.

Differences in application between aluminum foil and aluminum coils

Because aluminum materials are lightweight and easy to process, aluminum foil and aluminum coils are widely used in food, medicine, electronics, construction and other fields. Aluminum foil is usually used for packaging, such as when grilling barbecue or roasting chicken, to prevent the food from burning or drying out;
Aluminum coils are used in the construction field as roofs, wall panels and other materials.

Advantages and Disadvantages of Aluminum Foil and Aluminum Coil

Aluminum foil and aluminum coils both have the advantages of being lightweight, easy to process, and corrosion-resistant, but they also have their own disadvantages. For example, aluminum foil is thin and easy to tear, while aluminum rolls are thicker and difficult to bend and deform. In addition, since aluminum foil is used for packaging, it needs to have good sealing and toughness;
Aluminum coils, on the other hand, need to have strength and hardness to meet the requirements of the construction sector.

In summary, although aluminum foil and aluminum coils are both made of high-purity aluminum, they are different in size and use, so they need to be selected according to specific circumstances in actual applications.