Aluminum foil is a soft metal film, which not only has the advantages of moisture-proof, air-tight, light-shielding, abrasion-resistant, fragrant, non-toxic and tasteless, but also because of its elegant silver-white luster, it is easy to process beautiful patterns and patterns of various colors. pattern, so it is more likely to be favored by people. Aluminum foil has the advantages of light weight, airtightness and good wrapping performance, and is currently mainly used in the fields of packaging, electromechanical and construction.

1. Aluminum foil can be divided into thick foil, single zero foil and double zero foil according to the difference in thickness.

1. Thick foil: foil with a thickness of 0.1-0.2mm.

2. Single zero foil: foil with a thickness of 0.01mm and less than 0.1mm.

3. Double zero foil: The so-called double zero foil is an aluminum foil with two zeros after the decimal point when its thickness is measured in mm, usually an aluminum foil with a thickness less than 0.01, that is, an aluminum foil with a thickness of 0.005~0.009mm.

2. Aluminum foil can be divided into hard foil, semi-rigid foil and soft foil according to the state.

1. Hard foil: Aluminum foil that has not been softened (annealed) after rolling. Hard foil must be degreased before printing, laminating, and coating. If it is used for forming, it can be used directly.

2. Semi-rigid foil: aluminum foil whose hardness (or strength) is between hard foil and soft foil, usually used for forming processing.

3. Soft foil: Aluminum foil that has been fully annealed and softened after rolling. The material is soft and there is no residual oil on the surface. Most of the current application areas, such as packaging, lamination, electrical materials, etc., use flexible foils.

3. Aluminum foil can be divided into one-side light aluminum foil and two-side light aluminum foil according to the surface state.

1. One-sided smooth aluminum foil: double-rolled aluminum foil, one side is bright after being rolled, and one side is black. This kind of aluminum foil is called one-sided bright aluminum foil. The thickness of one side light aluminum foil usually does not exceed 0.025mm.

2. Double-sided aluminum foil: single-rolled aluminum foil, with two sheets in contact with the rolls. The two sides of the aluminum foil are divided into specular two-sided aluminum foil and ordinary two-sided aluminum foil due to the different surface roughness of the rolls. The thickness of two-sided light aluminum foil is generally not less than 0.01mm.

Due to its excellent characteristics, aluminum foil is widely used in food, beverages, cigarettes, medicines, photographic substrates, household daily necessities, etc., and is usually used as packaging materials, electrolytic capacitor materials, heat insulation materials for buildings, vehicles, ships, houses, etc.