Aluminum foil moisture resistance and application scope

Aluminum foil moisture resistance and application scope

2021-02-06
Aluminum foil moisture resistance and application scope

Aluminum foil performance:

Compared with other packaging materials, aluminum foil has good moisture resistance, and also has the advantages of long shelf life and safety. As the thickness of aluminum foil is reduced, pinholes will inevitably appear and increase as the thickness of aluminum foil is reduced. However, its moisture-proof performance is still superior to plastic films without pinholes and other packaging materials. This is mainly because the polymer chains of plastics are separated from each other and cannot prevent water vapor penetration. If the surface of the aluminum foil is coated with resin or with paper or plastic film The compound has better moisture resistance.

Application range of aluminum foil:

1. Composite for automobile
With the vigorous development of my country\'s automobile industry and the continuous increase of automobile aluminumization rate, the market demand for automobile foils is increasing rapidly. There are two kinds of automobile foils. One is the composite foil for automobile air conditioners. Full aluminum has been in the automotive industry, and the annual demand for aluminum foil reaches 15,000 tons. The other is composite foil for automotive radiators, which is used to manufacture automotive water tank radiators, automotive condensers and evaporators. The current automotive water tank aluminization rate reaches 40%, and the annual demand The amount is about 3 million tons.

2, medicated foil
Pharmaceutical packaging aluminum foil mainly includes easy-open bottle caps for liquids, injections, and pharmaceutical PTP aluminum foil. Because PTP aluminum foil has the advantages of moisture resistance, convenient carrying, safety and health, it is widely used in the international pharmaceutical industry. Our country has been using aluminum foil since 1985 for packaging medicines. Packaging aluminum foil only accounts for 20% of pharmaceutical packaging materials at that time. In recent years, the pharmaceutical foil market has developed rapidly.

3. Aluminum foil for packaging and aluminum foil for cable materials
The aluminum foil for wire and cable is made of aluminum-plastic composite, and the flexible packaging aluminum foil is a bag-type container made of flexible composite packaging materials. The emergence of flexible packaging has greatly improved the mechanization and automation level of the food and beverage industry, and accelerated the modernization of people\'s dietary life. In developed countries, flexible packaging has become one of the main packaging forms for food and beverages, replacing canned and bottled packaging within a certain range. In recent years, China\'s flexible packaging market has also developed rapidly, and so far it has been introduced 10 aluminum foil composite production lines, which can adopt different processes such as dry composite, hot melt composite, and extrusion composite according to the different uses of aluminum foil. Flexible packaging not only has the effects of moisture-proof and fresh-keeping, but also can print various patterns and characters, which is a modern commercial packaging, the ideal material. With the improvement of people\'s living standards, flexible packaging aluminum foil still has a lot of room for development.

4, aluminum foil for electrolytic capacitors
The aluminum foil used in electrolytic capacitors is a corrosive material that works under polar conditions. It has high requirements for the structure of the aluminum foil. The aluminum foil is divided into three types: cathode foil, with a thickness of 0.015mm~0.06mm; high-voltage foil, with the thickness of 0.065mm~0.1mm, which is required to be produced with high-purity aluminum and the low-pressure foil with a thickness of 0.06mm~0.1mm.

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