Only a small part of the moisture in some foods can escape. For this reason, aluminium is not only used in the chemical industry, but also in households.Īluminium foil has the advantage that it emits only little aroma. This is mainly due to the fact that the food is covered airtight. Many foodstuffs can be packed in the aluminium foil in a light-tight way. For gastronomy, aluminium foils are often used on 30 cm or 50 cm rolls. Properties of aluminium foil in the chemical and food industriesĪluminium foil in the chemical and household industries is usually 0.010 to 0.015 mm thin. The formula in the chemistry for such a film is: 4AICI3+3K – AI + 3 KAICI4. In this case potassium serves as a reducing agent. Aluminium foil can be produced in chemistry with potassium amalgam and aluminium chloride. So that it is flexible and soft again, it is subsequently soft annealed. The rolling process makes the aluminium somewhat hard and brittle. While one surface is glossy (sometimes also called glossy), the other side is rather matt due to repeated forming. Thin aluminium foils are milled in two layers. If very thin foils are required for the chemical industry, industry or for the household For the production, pre-rolled strips with a thickness of 0.6 to 1.5 mm are produced with several rolling steps to the required thickness. Today, aluminium foil is mostly made from pure aluminium (AI content 99 to 99.9%). Because of its reactivity, it often occurs only in a chemically bound state. Aluminium is the third most common element and most common metal present in the earth’s crust. It used to belong to the group of earth metals. In chemistry, aluminium belongs to the on-board group in the periodic table of the elements. The name is derived from the Latin word alumen or alum. The chemical element aluminium has the atomic number 13. It is malleable and equipped with a very noble surface. Aluminium is a natural material that is often used because of its good conductivity.
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