Foshan Preferential Cooling Copper Foil Processing
Calendered copper foil is a product made by repeatedly rolling and annealing high-precision copper strip (usually less than 150 microns in thickness) based on the principle of plastic processing (usually 4-100 microns in thickness and<800 mm in width). Its ductility, bending resistance and conductivity are better than those of electrolytic copper foil, and the copper purity is also higher than that of electrolytic copper foil.
Foshan Preferential Cooling Copper Foil Processing
The surface of the copper foil shall be smooth and clean without obvious wrinkles, oxidation spots, scratches, pitting, pits and stains. The porosity of 305g/m2 and above shall not exceed 8 penetration points within the area of 300ram × 300mm; The total area of pores on an area of 0.5m2 shall not exceed the circular area with a diameter of 0.125mm.
Foshan Preferential Cooling Copper Foil Processing
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.
Foshan Preferential Cooling Copper Foil Processing
Copper foil can be divided into calendered copper foil and electrolytic copper foil, which are mainly used for flexible printed circuits and other special purposes. In the production of clad laminates, a large number of applications are. As for the purity of copper, IEC-249-34 and Chinese standards stipulate that it shall not be lower than 99.8%.
