Why Is Prepainted Aluminum Used for Bottle Cap

 Bottle caps are essential for sealing all kinds of containers. Food and drinks are therefore optimally protected throughout their shelf life. One of the main bottle cap materials is the prepainted aluminum.

The painted aluminum sheet refers to an aluminum coil that is processed into aluminum sheets, then surface processed and coated with one or several layers of organic coatings such as polyester, fluorocarbon polyester, and then baked and solidified.

After the aluminum coil is coated, the paint covers its surface to form a firmly adherent continuous coating with corrosion resistance, which isolates the aluminum coil base from the corrosive medium, thereby preventing or slowing down damage caused by corrosion.

By using the diversity of paint colors and painting techniques, aluminum sheet can be painted to obtain decorative coatings of different colors, glosses, etc., making their appearance bright and dazzling, or rich in tone, which gives people a pleasing feeling, thereby increasing the added value of the product and expanding the application scope of the aluminum sheet.

Since the middle of the last century, the roller coating has been the main method. The production of color-coated aluminum coils is carried out by a precision coating machine evenly coating the surface of the pre-treated aluminum coils with the same thickness, entering the oven with an exhaust device at a constant speed, and using infrared or hot air circulation baking processes to bake and solidify.

Roller coating uses the coating roller as the carrier of the paint. The paint forms a wet film of a certain thickness on the surface of the coating roller. The coating roller contacts the object to be coated during rotation, and the paint is applied to the surface of the object to be coated.

Roller coating is suitable for coating flat metal plates, especially for high-speed coating of metal coils. Roller coating has the characteristics of fast coating speed, high production efficiency, and 100% paint utilization rate.

As one of the big painted aluminum sheet metal suppliers, the coating Haomei Aluminum chooses is of food grade and doesn’t contain BPA. It also has good adhesion and can withstand the test of high-temperature cooking. Welcome to leave message below to inquire what you need.

Original Source: https://www.alclosuresheet.com/a/why-is-prepainted-aluminum-used-for-bottle-cap.html