Air-conditioning foil is a specialized material for manufacturing heat exchanger fins for air-conditioners. The air-conditioning foils used in the early days were plain foils. In order to improve the surface properties of plain foils, hydrophilic foils are formed by applying corrosion-resistant inorganic coatings and hydrophilic organic coatings before molding. Hydrophilic foils account for 50% of the total amount of air conditioning foils, and the proportion of their use will increase further. There is also a water-repellent foil, so that the surface of the fin has a water-repellent function, preventing condensate from adhering. Due to the water-repellent foil to improve the surface defrosting technology to be further studied, the actual production is very little.
Air-conditioning foil thickness of 0.1mm ~ 0.15mm. With the development of technology, air-conditioning foil has a tendency to further reduce the thickness of Japan's leading products for the 0.09mm. In the very thin state, aluminum foil to have good formability, its organization and properties must be uniform, metallurgical defects, anisotropy is small, and at the same time require high strength, ductility, thickness uniformity, straightness is good. The specifications and alloys of air-conditioning foils are relatively single and suitable for large-scale production, but its market is seasonal, and it is difficult for professional manufacturers of air-conditioning foils to solve the contradiction between the oversupply in peak seasons and the virtually no demand in off-season.

As a result of strong market demand, in recent years, China's production capacity and technical level of air-conditioning foils continue to improve, has now formed a large, small, medium and small, high school and low production of air-conditioning foil enterprise groups, some large enterprises such as North China Aluminum, Bohai Aluminum product quality has basically reached the international advanced level. As a result of excess domestic production capacity, the market competition is extremely fierce.