Color painted aluminum coil for roofing

A color painted aluminum coil for roofing is made by coating PVDF paint onto the surface of aluminum rolls of given specifications, during which the flake-shaped ultra-fine infrared reflective powder pigments are added to the PVDF paint to obtain a high near-infrared region reflectivity. The colors of the pigments and the original fluorocarbon paint are the same. The painted coil has a better reflection of heat energy than ordinary aluminum rolls in the sun. This prevents the temperature of aluminum roofs from rapid rising and make the house cooler than outdoors. In addition, color coated aluminium roofing pieces add beauty to a house and a community.

There are two types of color painted aluminum coil used for roofing: mill finish coil and embossed coil. The alloys and specifications are different for the two. The mill finish aluminum coil for painted roofing aluminum coil covers alloys of 3003, 3004 and 3005. The coating thickness is over 0.8mm, and width of the coil can be 1000mm/600mm/575mm. The alloys for embossed painted aluminium roofing coil include 1100 and 3003, the coating thickness 0.25mm-0.50mm, and width 1200mm-1600mm. Those alloys can be painted with either pvdf or pe, depending on the service life you need. The most popular colors are white, silver, metal color, black, gold, red, blue etc. The ordinary patterns for embossed color coil are diamond and stucco. The price varies with the paint type and coating side(s) you require.

These color painted aluminum coils are used for roofing because of their excellent characteristics. First, they are corrosion resistant, heat insulating and cooling. This extends the service life of a roofing sheet. Second, the coating of the coils has low thermal conductivity and high heat reflectivity, making the temperatures of the roofing sheets and the inside of the house lower than that of the air. Third, the coils boast good penetration resistance and strong adhesion to the substrate, which are essential for a roofing material. Based on these features, the color painted aluminium coil becomes an advantageous roofing material.