Wenzhou Preferred Rolling Copper Foil Price
At the same time of thinning, it is also necessary to improve the tensile strength, elongation and other indicators, otherwise it is easy to cause copper foil fracture, affecting the safety of the battery. Therefore, it is the general trend that the future use will be more light and meet the above indicators.
Wenzhou Preferred Rolling Copper Foil Price
Small dirt, small exclamation mark. During the production of raw foil, the hair side is upward, and the dirt in liquid and air all fall on the hair side, which is printed on the smooth side after rolling. The reason is that the stains on the cathode roll are not dried. The surface temperature of the cathode roll is only 50 degrees, and the air temperature in the workshop is generally about 25 degrees. The surface hairiness is very good. The dirt itself has water, and the drying time is only 2-3 minutes. Therefore, the dirt on the copper foil cannot be completely dried.
Wenzhou Preferred Rolling Copper Foil Price
Galvanizing barrier layer: After the rough surface is galvanized, a barrier layer is formed to improve the oxidation resistance of the copper foil in natural air. After galvanizing, the appearance will look gray. After a period of storage, the gray will turn into copper yellow. The more zinc is plated, the more yellow the copper foil will be.
Wenzhou Preferred Rolling Copper Foil Price
In order to improve the adhesion strength of copper foil to the substrate, Generally, oxidation (that is, after oxidation treatment, a layer of copper oxide or cuprous oxide is generated on the surface, which improves the bonding strength of the copper foil and the substrate due to the polarity) or roughening copper foil (using electrochemical methods to generate a layer of roughening layer on the surface of the copper foil, which increases the surface area of the copper foil, and improves the bonding strength of the copper foil and the substrate due to the anchoring effect of the roughening layer on the substrate) is used.
