8021 Aluminum Foil Process Comparison

Comparing the production process of traditional 8021 aluminum foil and PET aluminum foil, it can be seen that the production process of PET aluminum foil is technically difficult and requires a more stringent production environment, which brings about an increase in cost but a reduction in the number of processes, improves the process performance of the aluminum foil, and there is no pollution of the waste residue, and the raw material utilization rate is high.

Traditional 8021 copper foil process: electrolysis or calendering
Traditional copper foil manufacturing process can be divided into electrolysis and calendering, and currently the mainstream is electrolysis, which has simple equipment and lower cost. The main production processes of electrolysis are copper dissolution, foil production, post-processing and slitting. In the copper dissolving process, copper is made into copper sulfate solution with sulfuric acid and deionized water to provide electrolyte that meets the process standard for the foil making process. In the foil-making process, copper sulfate electrolyte is used in the electrolyzer of the foil-making machine, and under the action of direct current, copper ions are deposited to make the raw foil, which is then peeled off and rolled up to form the rolled raw foil in the subsequent process.
Composite Copper Foil Process
The production process of composite 8021 copper foil is similar to that of aluminum foil. However, it mainly uses physical vapor deposition (PVD) to sputter a layer of several tens of nanometers of metal on the PET surface with a thickness of 4.5 μm, and in the second step, the metal layer on the surface is thickened by the method of ion replacement/water plating to form a copper layer with a thickness of about 900 nm, and the copper foil then undergoes washing, antioxidant treatment, drying, and slitting to be ready to be packaged and shipped.