Introduction of several key products of aluminum foil
(i) air conditioning foil
Air conditioning foil is a special material for the manufacture of heat exchanger fins for air conditioners, and the early use of air conditioning foil is a vegetarian foil. In order to improve the surface properties of vegetarian foil, an anticorrosive inorganic coating and hydrophilic organic coating were applied before forming to form hydrophilic foil. hydrophilic foil accounts for 50% of the total amount of air conditioning foil, and its use ratio will be further improved. In addition, there is a hydrophobic foil, so that the surface of the fin has hydrophobic function, to prevent condensate adhesion.
Because the technology of hydrophobic foil to improve surface defrosting needs further study, the actual production is very few. The thickness of air conditioner foil is 0.1mm~0.15mm. With the development of technology, air conditioning foil has a trend of further thinning, Japan's leading product thickness of 0.09mm. In a very thin state, aluminum foil to have good formability, its microstructure and performance must be uniform, less metallurgical defects, small anisotropy, at the same time requires higher strength, good ductility, uniform thickness, good straightness.
Air conditioning foil specifications and alloys are relatively single, suitable for mass production, but its market is seasonally strong, for the professional manufacturer of air conditioning foil, it is difficult to solve the high season shortage and low season almost no demand contradiction. Due to the strong market demand, in recent years, China's air conditioning foil production capacity and technical level continues to improve, has now formed a large and medium-sized, high-quality low-production air-conditioning foil business groups, some large enterprises such as North China aluminum, Bohai Aluminum products have basically reached the international advanced level.
Due to the excess domestic production capacity, the market competition is extremely fierce.
(ii) cigarette packaging foil
China is the world's largest cigarette production and consumption of major countries, at present, China has 146 large cigarette factories, the annual output of 34 million large boxes of cigarettes, the basic use of cigarette foil packaging, of which 30% use spray plating foil, 70% use calendering aluminum foil, Rolling aluminum foil consumption of 35,000 tons, with the increase of people's health awareness and the impact of foreign imports of cigarettes, the growth of smoke foil demand has slowed significantly, is expected to increase slightly in recent years.
China's cigarette packaging foil accounted for 70% of the total amount of double 0 foil, at present, there are two or three enterprises in China can produce high-quality smoke foil, the technical level and international level is comparable, but the overall quality of domestic cigarette foil and international standards have a certain gap.
(iii) decorative foil
Decorative foil is a decorative material applied in the form of aluminum-plastic composite, which utilizes the characteristics of good coloring of aluminum foil and high reflectivity of Photothermal. Mainly used for building, furniture decoration and part of the gift box packaging.
The application of decorative foil in China's construction industry began in the 1990s, from Shanghai, Beijing, Guangzhou and other central cities to the rapid spread of all parts of the country, in recent years, the demand has increased dramatically, generally as the building wall and interior furniture decorative materials, in the facade of commercial institutions and interior decoration is also widely used. Decorative foil has the advantages of heat insulation, moisture-proof, sound insulation, fire prevention and easy cleaning, and luxurious appearance, easy processing, construction and installation speed. At present, China's construction, home furnishings industry has formed the application of decorative foil craze. With the rapid development of China's construction industry and the continuous popularization of decorative foil applications, the demand for decorative foil will also be greatly increased.
In addition, the use of decorative foil packaging gifts in foreign countries are very popular, in recent years in China's rapid development speed, is expected to have a better prospect.
(iv) Cable foil
Cable foil is the use of aluminum foil sealing and shielding, single-sided or double-sided coating on the plastic film, composed of aluminum # plastic composite foil, used as a cable shield.
Cable foil requires less oil on the surface, no holes, high mechanical properties, overall quality requirements are not high, but the length of the requirements are extremely strict. Domestic advanced cold rolling mill, wan and aluminum foil coarse rolling mill can be produced, but the market growth is poor, the domestic demand of about 25,000 tons per year.