The utility model relates to a hot stamping material which is directly calendered into a sheet with metal aluminum. Its hot stamping effect is similar to that of pure silver foil, so it is also called fake silver foil. Due to the soft texture, good ductility and silver white luster of aluminum, if the calendered sheet is mounted on offset paper with substances such as sodium silicate, it can also be printed. However, the aluminum foil itself is easy to oxidize and darken, and the color will fade by friction and touch. Therefore, it is not suitable for hot stamping of long-term preserved book covers.
Because of its excellent characteristics, aluminum foil is widely used in food, beverage, cigarette, medicine, photographic base plate, household daily necessities, etc. it is usually used as its packaging material; Electrolytic capacitor materials; Thermal insulation materials for buildings, vehicles, ships, houses, etc; It can also be used as decorative gold and silver thread, wallpaper, and decoration trademarks of various stationery prints and light industrial products. Among the above various uses, it is used as packaging material that can effectively give play to the performance of aluminum foil. Aluminum foil is a soft metal film, which not only has the advantages of moisture-proof, air tightness, shading, abrasion resistance, fragrance preservation, non-toxic and tasteless, but also because it has elegant silver white luster and is easy to process beautiful patterns and patterns of various colors, so it is more likely to be favored by people. In particular, after aluminum foil is compounded with plastic and paper, the shielding property of aluminum foil is integrated with the strength of paper and the thermal sealing property of plastic, which further improves the shielding property of water vapor, air, ultraviolet and bacteria as packaging materials, and greatly widens the application market of aluminum foil. As the packaged goods are fully isolated from the light, moisture and gas of the outside world, the packaged goods are well protected. Especially for the packaging of cooked food, the use of this composite aluminum foil material can ensure that the food will not deteriorate for at least one year. Moreover, heating and unpacking are very convenient, which is deeply welcomed by consumers.
With the improvement of people's living standards and the development of tourism, the demand for beer, soda and other beverages and canned food is increasing day by day. All these need modern packaging and decoration to facilitate competition in the international market. In order to meet the market requirements, people have developed packaging materials such as plastic film and sprayed foil with good shielding, but their comprehensive properties are not as good as overcoating and lamination. Therefore, it can be said that aluminum foil is a perfect packaging material with a variety of excellent properties, which fully shows its broad application prospects in many fields.
In order to improve the rolling efficiency and the quality of aluminum foil products, the modern aluminum foil rolling mill is developing in four directions: large coil, wide width, high speed and automation. The roll body width of contemporary aluminum foil rolling mill 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 automation level of rolling mill is also greatly improved. Thickness control system (AGC) is generally installed, and most of them are installed with flatness gauge (AFC). Aluminum foil industry is facing a period of rapid development
