Aluminum foil is a kind of aluminum rolled material. Aluminum foil is mainly about thickness. In the industry, aluminum products with a thickness less than 0.2mm are usually called aluminum foil. The edges are usually cut vertically and delivered in rolls. Aluminum foil is a soft metal film. It not only has the advantages of moisture-proof, air-tight, light-shielding, abrasion resistance, fragrance retention, non-toxic and tasteless, but also because of its elegant silver-white luster, it is easy to process beautiful patterns and colors of various colors. pattern.
According to thickness, aluminum foil can be divided into double zero foil, single zero foil and thick foil. Double-zero foil refers to a foil that has two zeros after the decimal point when its thickness is measured in mm (i.e. thickness <0.01mm); similarly, single-zero foil refers to a foil that has one zero after the decimal point when its thickness is measured in mm. Foil (0.01mm≤thickness<0.1mm); thick foil refers to aluminum foil with a thickness between 0.1mm and 0.2mm.
Generally speaking, double zero foil is mainly used for food packaging, cigarette packaging, electronic optical foil, etc.; single zero foil is used for some food packaging, pharmaceutical packaging, electronic circuit signal shielding, air conditioning foil, etc.; thick foil is mainly used for air conditioning foil, Container foil, architectural decoration and industrial uses.
Classification by shape
According to the shape, aluminum foil can be divided into roll aluminum foil and sheet aluminum foil. Most of the aluminum foil deep-processed wool is supplied in rolls, and only a few handicraft packaging occasions use sheet aluminum foil. According to the state, aluminum foil can be divided into hard foil, semi-rigid foil and soft foil.
① Hard foil: aluminum foil without softening treatment (annealing) after rolling, without degreasing treatment, there will be residues on the surface. Therefore, the hard foil must be degreased before printing, laminating, and coating, and it can be used directly if it is used for forming.
② Semi-rigid foil: aluminum foil whose hardness (or strength) is between the rigid foil and the 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 application areas, such as packaging, composites, electrical materials, etc., use soft foils.
