What is the difference between a single-layer and multilayer aluminum coil?

A single-layer aluminum coil consists of a single sheet of aluminum wound into a roll, while a multilayer aluminum coil is made up of multiple sheets of aluminum stacked and wound together. Single-layer coils are simpler in structure and are often used for applications requiring less complexity, such as basic insulation or simple wrapping. Multilayer coils, on the other hand, offer increased strength and can provide better insulation properties due to the multiple layers. They are also used in applications where space is limited, as they can be more compact. Additionally, multilayer coils can be tailored for specific heat transfer or electrical conductivity needs by varying the thickness and composition of the layers.