Aluminum foil is aluminum thin sheet with a thickness less than 0.2 mm, thinner gauges down to 0.006mm. It is widely used in food packaging and industrial production because of its excellent characteristics. It has excellent barrier properties, thermal and electrical conductivity and reflectivity, etc. These physical properties bring more protection to the product, reduce the energy required for cooling, and extend the shelf life of the product.

Aluminum is a very active metal, so it is easily oxidized by oxygen in the air to form aluminum oxide at normal temperature and pressure. Aluminum oxide is a dense protective film, which can prevent some substances from further corroding aluminum.

Classification of Aluminum Foil

Classification by thickness

Thick foil: With a thickness of 0.1-0.2mm.

Single zero foil: With thickness ≤0.1mm.

Double zero foil: With two zeros after the decimal point when its thickness is measured in mm, usually the thickness is less than 0.0075mm.

Classification by temper

Hard foil: Without softening treatment (annealing) after rolling.

Semi-rigid foil: Hardness is between hard foil and soft foil.

Soft foil: After rolling, it has been completely annealed and softened. The material is soft and has no oil residue on the surface.

Classified by processing status

General foil: Without any other processing after rolling.

Embossed foil: With various patterns on the surface.

Composite foil: Formed by pasting aluminum foil, paper, plastic film, and cardboard together.

Coated foil: Coated with various resins or paints on the surface.

Colored foil: Coated with color on the surface.

Printed foil: With various patterns, patterns, characters or pictures printed on the surface.

From thick foil to single zero foil and double zero foil, this material with a thickness of no more than 0.2mm is widely used in daily life. There are household foils, container foils, lunch box foils, food foils, flexible packaging foils, beer sealing foils, etc. used in food. In addition to the kitchen, aluminum foil is commonly used in life, such as medicinal foil, cigarette foil, hairdressing foil and decorative foil. Other application fields include battery foil, battery soft package foil, electronic label foil, circuit board foil, air-conditioning duct foil, brazing foil, automotive air-conditioning fin foil, heatsink foil, printing foil, electronic foil, thermal insulation foil, circuit board foil, cardboard foil, heat sealing foil, electronic foil, etc.