After the aluminum foil is combined with plastic and paper, the shielding properties of the aluminum foil are integrated with the strength of the paper and the heat sealing properties of the plastic, further improving the shielding performance against water vapor, air, ultraviolet rays and bacteria necessary for packaging materials, and greatly Expanding the application market of aluminum foil. Because the packaged items are fully isolated from outside light, moisture, air, etc., the packaging is fully protected. Especially for the packaging of steamed 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 opening packages are very convenient and are very popular among customers. 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 day by day. These require modern packaging and Decoration to facilitate competition in the international market.
In order to adapt to market requirements, people have developed packaging materials such as plastic films and spray foils with good shielding properties, but their comprehensive functions are not as comprehensive as overcoating and lamination processes that can be compensated and improved. Therefore, it can be said that aluminum foil is a relatively perfect packaging material with many excellent functions, and it has fully demonstrated its broad application prospects in many fields.
In order to improve 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 of modern aluminum foil rolling mills has reached more than 2200mm, the rolling speed has reached more than 2000m/min, and the coil weight has reached more than 20t. The corresponding level of rolling mill automation has also been greatly improved, with thickness control systems (AGC) installed throughout, and flatness gauges (AFC) installed in most.
