Hydrophobic aluminum foil is also called water-repellent aluminum foil, and its surface properties are exactly the opposite of hydrophilic aluminum foil. That is, when the condensed water condenses onto the surface of the aluminum foil, the contact angle with the aluminum foil is relatively large, generally 75. above. The larger the angle, the better the water repellency. The ultimate purpose of using hydrophobic aluminum foil is the same as that of hydrophilic aluminum foil, which is to prevent condensation water from remaining between the heat exchange fins. The difference is that the hydrophobic aluminum foil removes the condensed water between the heat exchange fins by increasing the contact angle between the condensed water and the heat exchange fins, causing the condensed water to form water droplets that are easy to slide off.
Self-lubricating aluminum foil
During the processing of air-conditioning heat exchange fins, lubricating oil is generally added to the surface, then punched and flanged, and finally the lubricating oil is washed away with trichlorethylene. Since trichlorethylene is harmful to the human body, in order to reduce this process, self-lubricating aluminum foil was produced accordingly. As the name suggests, self-lubricating aluminum foil does not require separate lubricating oil during its punching process. The lubrication during punching is borne by a pre-treated film on the surface of the aluminum foil. Since there is no need to add special lubricating oil, the subsequent cleaning and drying process of trichlorethylene is omitted.
