foil aluminium1.Is aluminum foil really aluminum?
Yes, aluminum foil is actually aluminum，Because of its excellent properties, aluminum foil is widely used in food, beverages, cigarettes, medicines, photographic plates, household daily necessities, etc., and is usually used as its packaging material; electrolytic capacitor material; thermal insulation material for buildings, vehicles, ships, houses, etc.; it can also As decorative gold and silver thread, wallpaper and various stationery prints and decoration trademarks of light industrial products, etc. Among the above-mentioned various uses, the one that can exert the most effective performance point of aluminum foil is as a packaging material. Aluminum foil is a soft metal film, which not only has the advantages of moisture resistance, air tightness, shading, abrasion resistance, fragrance preservation, non-toxic and tasteless, etc., but also because of its elegant silver-white luster, it is easy to process beautiful patterns and patterns of various colors. pattern, so it is more likely to be favored by people. Especially after the aluminum foil is compounded with plastic and paper, the shielding properties of aluminum foil are integrated with the strength of paper and the heat sealing property of plastic, which further improves the shielding properties of moisture, air, ultraviolet rays and bacteria, which are necessary as packaging materials. , greatly broadening the application market of aluminum foil. Since the packaged items are fully isolated from the outside light, humidity, gas, etc., the packaged items are well protected. Especially for the packaging of cooked 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 and canned foods such as beer and soda is increasing, which requires modern packaging and decoration to facilitate competition in the international market. In order to meet market requirements, people have developed packaging materials such as plastic films and sprayed foils with good shielding properties, but their comprehensive properties are not as good as overcoating and lamination can be compensated and improved. Therefore, it can be said that aluminum foil is a perfect packaging material with a variety of excellent properties, and it has fully shown 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-roll, wide-width, high-speed, and automation. The width of the roll body of the 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 automation level of the corresponding rolling mill has also been greatly improved, and the thickness control system (AGC) is generally installed, and most of them are installed with a shape meter (AFC). The aluminum foil industry is facing a period of rapid development.
Is aluminum foil toxic to humans? non-toxic " The surface of aluminum foil is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface. Aluminum foil is a non-toxic packaging material, which can be in direct contact with food without any risk of harming human health. Aluminum foil is an odorless packaging material. Odorless packaging materials will not make the packaged food have any peculiar smell.
Aluminium foil, also known as aluminum foil, called tin foil in Hong Kong, is a tool made of flattened metal aluminum, mainly used for cooking in the kitchen, serving food, or making some Materials that can be easily cleaned. Thousands of tons of aluminum foil are used around the world to protect and wrap food, cosmetics and chemicals. Most aluminum foils are shiny on one side and matte on the other. Foods can be wrapped with aluminum foil on both sides. Usually, it is recommended to wrap them with a glossy side to improve thermal conductivity. history
The original tin foil was really made of tin, which was harder than aluminum foil, and also brought a tin smell to food. Therefore, after the price of aluminum dropped, aluminum foil replaced tinfoil in daily life. However, since metal aluminum can affect the development of the brain, the surface layer of the current aluminum foil is coated to avoid the release of metal aluminum.
Aluminum foil is usually used for food (eg: aluminum foil trays), and is used to wrap bean sprouts, potatoes, sweet potatoes, etc. for grilling when grilling to prevent them from burning. Sometimes it is also used for decoration. Modern aluminum foil is made of aluminum and can also be used as aluminum electrodes for electrolysis. There are also hair stylists who perm their clients' hair with aluminum foil. Some people also use aluminum foil to soak up the oil in the soup. Aluminum foil is also widely used for insulation, heat exchange, and as electrical conductors. Usually, the thickness of aluminum foil used in paper-packed beverage packaging and food packaging bags is only 6.5 microns. This thin layer of aluminum is waterproof, umami-preserving, bacteria- and stain-resistant.
It is very common to use aluminum foil trays for food. Although aluminum foil trays are disposable, the ingredients are aluminum, which is less harmful to nature.
Some foods (eg: sweet potatoes, enoki mushrooms, etc.) must be wrapped in aluminum foil to avoid burning. Wrap it in aluminum foil to cook seafood, enoki mushrooms, etc., to preserve the umami. Electric hair
Some hair stylists will wrap the hair with aluminum foil to heat the hair, which has a better heat transfer effect. Improper use of aluminum foil for power generation can lead to problems such as burns and poor hair quality.
Spread the aluminum foil into a ball and open it to absorb the oil in the soup. The principle is that in the process of crumpling the aluminum foil, the surface tension of the aluminum foil will be amplified. Why is foil used aluminium? Aluminum foil has a clean, hygienic and shiny appearance. It can be made into integrated packaging materials with many other packaging materials, and the surface printing effect of aluminum foil is better than other materials. In addition, aluminum foil has the following characteristics:
(1) The surface is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface.
(2) It is a non-toxic packaging material, which can be in direct contact with food without any danger of harming human health.
(3) It is an odorless and odorless packaging material, which will not make the packaged food have any peculiar smell.
(4) If the aluminum foil itself is not volatile, it and the packaged food will never dry or shrink.
(5) No matter in high temperature or low temperature, the aluminum foil will not have the phenomenon of grease penetration.
(6) It is an opaque packaging material, so it is a good packaging material for products exposed to sunlight, such as margarine.
(7) Aluminum foil has good plasticity, so it can be used to package products of various shapes. Various shapes of containers can also be arbitrarily formed.
(8) Aluminum foil has high hardness and high tensile strength, but its tear strength is small, so it is easy to tear.
(9) The aluminum foil itself cannot be heat sealed, and a heatable material, such as pe, must be coated on its surface to be heat sealed.
(10) When aluminum foil is in contact with other heavy metals or heavy metals, there may be adverse reactions.