The aluminum foil has a clean, hygienic and shiny appearance. It can be integrated with many other packaging materials, and the surface of the aluminum foil is better than other materials. In addition, the aluminum foil has the following characteristics:
1. The surface of the aluminum foil is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface.
2. Aluminum foil is a non-toxic packaging material that can be in direct contact with food without any concern that may endanger human health.
3. Aluminum foil is an odorless and odorless packaging material that does not impart any odor to the packaged food.
4. If the aluminum foil itself is not volatile, it itself and the packaged food will never dry or shrink.
5. There is no oil penetration of the aluminum foil at high temperatures or at low temperatures.
6. Aluminum foil is an opaque packaging material, so it is a good packaging material for products exposed to sunlight, such as margarine.
7. Aluminum foil has good plasticity, so it can be used to package products of various shapes. It can also be used to create containers of various shapes.
8. The aluminum foil has a large hardness and a large tensile strength, but its tear strength is small, so it is easily torn.
9. The aluminum foil itself cannot be heat-sealed and must be coated with a heat-sensitive material such as pe to be heat-sealed.
10. When aluminum foil is in contact with other heavy metals or heavy metals, there may be adverse reactions.
Aluminum foil can be classified into hard foil, semi-hard foil and soft foil according to the state.
1. Hard foil: Aluminum foil that has not been softened (annealed) after rolling, and has no residue on the surface without degreasing. Therefore, the hard foil must be degreased before printing, lamination, coating, and can be used directly if it is used for forming.
2. half hard foil: aluminum foil hardness (or strength) between the hard foil and the soft foil, usually used for forming.
3. soft foil: aluminum foil which is softened after being fully annealed after rolling, the material is soft and there is no residual oil on the surface. Soft foils are used in most applications, such as packaging, composites, and electrical materials.