Five main areas of application of aluminum foil

【China Aluminum Industry Network】 1. Composite foils for automobiles With the rapid development of China's auto industry and the continuous increase in the rate of auto aluminumization, the market demand for automotive foils has increased rapidly. There are two types of automotive foils, one is automotive. Composite foils for air conditioners, China's auto air conditioners have been fully aluminized, and the annual demand for aluminum foil is 15,000 tons; the other is composite foils for automotive radiators used in the manufacture of radiators for automotive radiators, automotive condensers, and evaporators. At present, the aluminumization rate of automobile tanks reaches 40%, and the annual demand is about 0.3 million tons.
Second, medicine foil Pharmaceutical packaging aluminum foil mainly includes water, injection of easy-open cap and medicinal PTP aluminum foil, due to PTP aluminum foil with moisture, easy to carry, safety and health, etc., in the international pharmaceutical industry is widely used. Since 1985, China began to use aluminum foil packaging medicines. To date, packaging aluminum foil accounts for only 20% of pharmaceutical packaging materials. In recent years, the pharmaceutical foil market has witnessed rapid development. On the one hand, the pharmaceutical market has developed rapidly, but mainly because 20% aluminum foil is used in pharmaceutical packaging. The proportion of applications in the continuous increase.
Third, flexible packaging aluminum foil flexible packaging is the use of soft composite packaging materials made of bag-type containers, the emergence of flexible packaging has greatly enhanced the food and beverage industry, the level of mechanization, automation, and accelerate the modernization of people's diet, social progress. In developed countries, flexible packaging has become one of the main forms of packaging for food and beverages, replacing canned and bottled products within a certain range. In recent years, China's flexible packaging market has also developed rapidly. To date, 10 aluminum foil composite production lines have been introduced. Different technologies such as dry compounding, hot melt compounding, and extrusion compounding can be used according to the different uses of flexible packaging. Soft packaging not only has the effect of moisture-proof, fresh-keeping, but also can print a variety of designs and texts. It is an ideal material for modern commercial packaging. With the improvement of people's living standards, flexible packaging aluminum foil has a lot of room for development.
Fourth, the aluminum foil used in electrolytic capacitor aluminum foil electrolytic capacitor is a corrosive material working under polar conditions, the aluminum foil has a higher organizational structure requirements, the use of aluminum foil is divided into three types: cathode foil, a thickness of 0.015mm ~ 0.06 Mm; high-pressure foil, thickness of 0.065mm ~ 0.1mm, requiring the production of aluminum foil with high purity aluminum; low pressure foil, thickness of 0.06mm ~ 0.1mm.
There are fewer manufacturers of aluminum electrolytic capacitors in China, mainly due to the lack of market demand, and there is a big gap between production technology and advanced countries. However, aluminum electrolytic capacitors have good performance, low price, and wide range of uses, so the market prospects are very good. At present, Japan's annual demand is 45,000 tons, which is 6 times that of the Chinese market. With the development of the electronics industry and China becoming a major industrial production base, the market demand for electrolytic capacitor aluminum foil is promising.
Fifth, the appearance of the aluminum foil cable for cables needs to be wrapped with a layer of aluminum foil to protect and shield it. This kind of aluminum foil is usually made of 1145 grade industrial pure aluminum. After continuous casting, continuous rolling, cold rolling, slitting and complete annealing, it is divided into small rolls according to user's length and supplied to the cable foil compounding plant to cover the surface of aluminum foil with plastic. The film is slit into several small strips and supplied to the cable factory.
The cable foil is made by attaching a special plastic film (0.058mm thick) to the upper and lower surfaces of a 0.15-0.20mm thick aluminum foil. The sticking method is dry sticking and wet sticking. The dry method uses high temperature (200°C) roll pressing to apply the film; the wet method is adhesive bonding. Most currently use dry methods. After affixing the plastic film, the film was peeled off from the aluminum foil with a special instrument to determine the degree of firm adhesion of the plastic film. This measurement data is very important and is called peel strength. According to the telecommunications cable industry standard (code number YD/T 73.2-94), the strength should not be less than 6.13N/cm; in addition, the heat seal strength should not be less than 17.5N/cm. The surface quality of aluminum foil is a major factor affecting the peel strength. The main surface quality problems are oil spots, corrosion, and peroxide.