Pure aluminium foil or aluminium foil as needed
Thick and thin
We produce for you hard and soft, smooth and embossed pure aluminium foils as thin foils for example in 10, 15, 20 µm and as stronger foils 30 – 300 µm. Even oversize widths are possible.
Aluminium with a purity of 99 % or higher is called pure aluminium. Primary aluminium, i.e. the metal produced in an electrolytic furnace, contains a series of "impurities". In general, however, only the elements iron and silicon are present in quantities exceeding 0.01 %.
With regards to aluminium foils > 0.030 mm (30 µm), the most common aluminium alloy is EN AW-1050: pure aluminium foil with an aluminium content of at least 99.5 %. (Aluminium > 0.300 mm is generally called aluminium strip or aluminium sheet.)
Shiny and matt
Aluminium foils are usually produced using pure aluminium (Al content 99 – 99.9 %). So-called pre-rolled strip with approx. 0.6 – 1.5 mm thickness is cold-rolled in several rolling steps (passes) to the required thickness.
In the production of very thin aluminium foil, two layers are rolled. This leads to two different surfaces (shiny and matt). The reason for this is that the outside surfaces come into contact with the polished rolling mill and therefore become relatively smooth (shiny), while the inside surfaces have a slightly more roughened surface due to free forming and thus appear matt.
The aluminium hardens during rolling due to the strong forming and this means that the aluminium becomes harder or stiffer. Subsequent soft annealing makes it soft and flexible again.
Frequently Asked Questions
What foil thicknesses do you offer?
Our standard aluminium foil product range provides a general overview. We have many more thicknesses in our portfolio. The maximum thickness is 0.300 mm. The thinnest foil that we produce is 0.010 mm.
What standard lengths do you have?
None, really. Dependent on the material thickness, we can produce rolls just 5 m in length or even roll lengths of up to 20.000 m, for example. Our standard product range provides a general overview.
What is the difference between hard and soft aluminium foils?
Though forming hard aluminium foil requires more effort, it stays in form better. Soft aluminium foils result from subsequent annealing. They can be formed more easily, are more flexible and therefore rather used for coatings.
Is aluminium foil free of grease?
In general: no! To produce aluminium foils free of grease or rolling oil, they have to be chemically degreased. But the thinner and softer the aluminium foils, the smaller the residue of rolling oil. Please find more about this topic in our Alu-Notes.