What are the production methods of copper foil? What is the technological process of copper foil production? What are the problems in copper foil production? Let's first understand what copper foil is. Copper foil is a key conductive material in lithium ion batteries and printed circuit boards. Copper foil is a kind of negative electrolytic material. It is a thin, continuous metal foil deposited on the substrate of circuit board. Copper foil can be divided into many kinds according to different classifications. Copper foil can be divided into thick copper foil (more than 70 μ m) Regular thickness copper foil (more than 18 μ M but less than 70 μ m) Thin copper foil (more than 12 μ M but less than 18 μ m) Ultra thin copper foil (less than 12 μ m) Etc. Copper foil can also be divided into: single-sided treated copper foil (single-sided hair), double-sided treated copper foil (double-sided thick), smooth treated copper foil (double-sided hair), double-sided glossy copper foil (double-sided hair) and very low profile copper foil (VLP copper foil) according to the surface condition. Finally, copper foil can be divided into: Electrolytic copper foil and Calendered copper foil 。 So today we will focus on the production methods of electrolytic copper foil and calendered copper foil.

Before talking about the production method of copper foil, let's first understand the definition of electrolytic copper foil: it is formed by the deposition of copper ions in electrolyte on the round cathode roller of smooth rotating stainless steel plate (or titanium plate). The surface of copper foil close to the cathode roller is called smooth surface, and the other surface is called rough surface.

Electrolytic copper foil production Methods: At present, roll cathode and insoluble anode are widely used in the continuous production of electrolytic copper foil in China.