Aluminium Foil Properties and Applications
Aluminium foil is made from an Aluminium alloy that contains between 92 and 99 % Aluminium. Aluminium was originally conceived as a replacement for Tin foil, a patent was taken out in 1910 for the continuous rolling process in Switzerland, and soon after Toblerone began wrapping its chocolate bars with it.
It is produced in many widths and strengths depending on its applications although it is commonly found in thin sheets of less than 0.2mm. One of the most characteristic properties of Aluminium foil is that it is pliable, and can be easily bent folded, or wrapped around objects. Its unique barrier properties provide a total block to light, moisture and aroma that makes it perfect for food packaging and protection. Today it is used in a wide range of markets, from food and drink to pharmaceuticals. Aluminium foil can also be laminated onto other materials such as plastics or paper, enhancing their performance.
The raw materials necessary for its manufacture are plentiful, although 75 per cent of Aluminium ever produced is still in use. This material is inexpensive, durable, non-toxic, and greaseproof. In addition, it resists chemical attack and provides excellent electrical and non-magnetic shielding.
Apart from packaging, it is used to manufacture thermal insulation for the construction industry, fin stock for air conditioners, electrical coils for transformers, capacitors for radios and televisions, and insulation for storage tanks.