Overview of aluminum foil
Because of its excellent characteristics, aluminum foil is widely used in food, beverages, cigarettes, medicines, photographic substrates, household daily necessities, etc., and is usually used as its packaging material; electrolytic capacitor material; heat insulation material for buildings, vehicles, ships, houses, etc.; As decorative gold and silver thread, wallpaper, various stationery printed matter and decorative trademarks of light industrial products. Among the above-mentioned various uses, the most effective use of aluminum foil is as a packaging material. Aluminum foil is a soft metal film, which not only has the advantages of moisture proof, air tightness, shading, abrasion resistance, fragrance retention, non-toxic and tasteless, etc., but also because of its elegant silver-white luster, it is easy to process beautiful patterns and various colors. Patterns are more likely to be favored by people. Especially after the aluminum foil is compounded with plastic and paper, the shielding properties of the aluminum foil are integrated with the strength of the paper and the heat-sealability of the plastic, which further improves the shielding performance of moisture, air, ultraviolet rays and bacteria necessary as a packaging material. , Which greatly broadens the application market of aluminum foil. Since the packaged items are fully isolated from outside light, humidity, air, etc., the package is well protected. Especially for the packaging of retort food, the use of this composite aluminum foil material can ensure that the food does not deteriorate for at least one year. Moreover, heating and unpacking are very convenient, which is very popular among consumers.
With the improvement of people's living standards and the development of tourism, the demand for beverages such as beer and soda and canned food is increasing. These all require modern packaging and decoration to facilitate competition in the international market. In order to meet market requirements, people have developed packaging materials such as good shielding plastic films and sprayed foils, but their overall performance is not as good as over-coating and lamination processing can be compensated and improved. Therefore, it can be said that aluminum foil is a relatively perfect packaging material with a variety of excellent properties, and it has fully demonstrated its broad application prospects in many fields.
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 body width of contemporary aluminum foil rolling mills has reached over 2200mm, the rolling speed has reached over 2000m/min, and the coil weight has reached over 20t. Corresponding rolling mill automation level has also been greatly improved. Thickness control system (AGC) is generally installed, and most of them are equipped with shape meter (AFC). The aluminum foil industry is facing a period of rapid development.