Aluminiumfolies

Aluminiumfolies are thin sheets of aluminum metal produced by rolling. They are used in a wide range of sectors, including food packaging, cooking, insulation, and electronics. The term is used in several languages to refer to aluminum foil or layered foil products.

Manufacture involves primary aluminum extrusion into billets, then hot and cold rolling to achieve final thicknesses from about 0.006 to 0.2 millimeters. Consumer foils typically measure 0.016–0.024 millimeters. Aluminiumfolies are highly ductile and malleable, with good reflectivity, low density, and moderate barrier properties against light, moisture, and gases when intact. They may be coated, printed, or laminated to form composites.

Common uses include wrapping and storing food, baking and grilling, and protective packaging. They are also employed in building insulation, heat exchangers, and electromagnetic shielding. Laminated foils combine aluminum with plastics, paper, or coatings to create packaging with specific barrier or mechanical properties.

Recycling is widely practiced; aluminiumfolies are reclaimed to recover aluminum and reduce energy use. Cleaned, unprinted, or lightly contaminated foils are easier to recycle, though local guidelines vary. In most jurisdictions, aluminum foil is considered food-contact safe when used as intended, but it should not be reused if it is contaminated with oils or strong flavors.