However, aluminum foil itself is easy to oxidize, the color becomes darker, and it will fade when touched by friction, which is not suitable for long-term preservation of book covers. In order to improve the rolling efficiency and the quality of aluminum foil products, modern aluminum foil rolling mills are developing in four directions: large coil, wide width, high speed and automation. The roll width, rolling speed and winding weight of contemporary aluminum foil rolling mills are over 2200mm, 2000m/min and 20 t respectively.
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Because of its excellent characteristics, aluminum foil is widely used in food, beverages, cigarettes, medicines, photographic negatives, household items and so on. , usually used as its packaging material; Electrolytic capacitor materials; Thermal insulation materials for buildings, vehicles, ships and houses; It can also be used as decorative gold and silver thread, wallpaper and decorative trademark of various stationery, printed matter and light industrial products.
Among the above uses, aluminum foil is the most effective packaging material. Aluminum foil is a kind of soft metal film, which is not only moisture-proof, airtight, light-proof, wear-resistant, fragrant, non-toxic and tasteless, but also easy to process exquisite patterns and patterns of various colors because of its elegant silver luster, so it is more easily favored by people.
Baidu encyclopedia-aluminum foil