Aluminum Foil

Aluminum foil refers to thin strips of aluminum and aluminum alloy with a thickness of ≤0.2mm. Its hot stamping effect is similar to that of pure silver foil, so it is also called fake silver foil. Because aluminum has a soft texture, good ductility, and silver-white luster, if the rolled sheet is mounted on offset paper with sodium silicate and other materials to make aluminum foil, it can also be printed. Aluminum foil is generally classified according to the thickness, state and purpose.

According to thickness: aluminum foil larger than 0.012mm is called single foil, and aluminum foil less than or equal to 0.012mm is called double foil; there is also a single zero foil with a thickness after the decimal point and two zeros after the decimal point. Double zero foil.

According to the state: it can be divided into full hard foil, soft state foil, semi-rigid foil, 3/4 hard foil, 1/4 hard foil. Full-hard foil refers to the foil that has not been annealed after rolling (completely annealed coils and >75% cold-rolled); soft-state foil refers to the foil that has been completely annealed after cold rolling; where the tensile strength of aluminum foil is between that of full-hard The one between foil and soft foil is called semi-rigid foil; where the tensile strength is between full rigid foil and semi-rigid foil, it is 3/4 rigid foil; the tensile strength of aluminum foil is between soft foil and semi-rigid foil The one between the foils is called 1/4 hard foil.

According to the surface state: it can be divided into single-sided light foil and double-sided light foil. Aluminum foil rolling is divided into single rolling and double rolling. During single rolling, both sides of the foil are in contact with the roll surface, and both sides have bright metallic luster, which is called double-sided smooth foil. During double rolling, only one side of each foil is in contact with the roll, and the side in contact with the roll is bright, and the two sides in contact with each other between the aluminum foils are dark. This kind of foil is called a single-sided smooth foil. The minimum thickness of double-sided aluminum foil mainly depends on the diameter of the work roll, usually not less than 0.01mm, the thickness of single-sided aluminum foil is usually not greater than 0.03mm, and the current minimum thickness can reach 0.004mm.

According to the purpose of aluminum foil: it can be divided into packaging aluminum foil, air conditioning aluminum foil, electronic aluminum foil and battery aluminum foil, etc.

Benefits of Aluminum Foil

1.Excellent light-shielding properties: As an opaque material, aluminum foil can well block sunlight and protect packaged items from the effects of light.

2.Good gas barrier properties: Aluminum foil has good gas barrier properties and can effectively prevent water vapor, air and other external factors from corroding the packaged items, thereby extending the shelf life of the items.

3.Good shape stability: Whether in high or low temperature environments, aluminum foil can maintain its shape stability and will not be deformed due to temperature changes.

4.Easy to process: Aluminum foil has good ductility and plasticity and can be easily processed into various shapes and sizes to meet different use needs.

5.Clean and hygienic: The surface of aluminum foil is extremely clean and hygienic. No bacteria or microorganisms can grow on its surface, so it is a non-toxic and harmless packaging material.

6.Tasteless and odorless: Aluminum foil itself is tasteless and odorless, and will not cause any peculiar smell to the packaged food, ensuring the original flavor of the food.

7.Moisture-proof and anti-corrosion: Aluminum foil has good moisture-proof and anti-corrosion properties, and can effectively protect the packaged items from moisture and corrosion.

Applications of Aluminum Foil

1.Food packaging: Aluminum foil is widely used in the field of food packaging, such as household foil, container foil, lunch box foil, food foil, etc. These aluminum foil products can effectively protect the freshness and taste of food and extend the shelf life of food. At the same time, aluminum foil can also be compounded with materials such as plastic and paper to further improve the performance of packaging materials.

2.Pharmaceutical packaging: Pharmaceutical foil is an application of aluminum foil in the field of pharmaceutical packaging. It has the advantages of non-toxic, corrosion-resistant, impermeable, heat-resistant, moisture-proof, light-blocking, and high-temperature sterilizability. Medicinal foil is mainly used for blister packaging of pharmaceutical capsules, tablets, etc., as well as bag packaging of powder granules and liquids, ensuring the safety and effectiveness of medicines.

3.Building decoration: Aluminum foil can also be used as a decorative material for the decoration of inner walls of buildings and indoor furniture. Decoration foil has the characteristics of moisture-proof, anti-corrosion, heat and sound insulation, etc., which can improve the comfort and aesthetics of the indoor environment.

4.Electronic products: Aluminum foil also has important applications in the field of electronic products, such as battery foil, electronic label foil, circuit board foil, etc. These aluminum foil products play an important role in the manufacturing and assembly process of electronic products.

5.Other fields: Aluminum foil can also be used to make air-conditioning foil, brazing foil for automobile water tanks, aluminum foil for radiators, etc. These aluminum foil products play an important role in their respective fields and promote the development of related industries.

Quality Control and Technological Innovation

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