Wenzhou Preferred Copper Foil Manufacturer
Although the thickness of copper foil gradually becomes thinner, power battery manufacturers use 6 μ When the product is less than or equal to m, the coating machine, winding machine and other key equipment as well as the technological level cannot solve the problems such as wrinkles, belt breakage and high-temperature oxidation encountered in the production process, which leads to the inability to mass produce ultra-thin copper foil with high yield.
Wenzhou Preferred Copper Foil Manufacturer
In order to avoid the copper oxide powder falling off and moving to the substrate, the surface treatment method has also been constantly improved. For example, TW copper foil is coated with a thin layer of zinc on the roughened surface of the copper foil, and the surface is gray; TC type copper foil is coated with a thin layer of copper zinc alloy on the roughened surface of the copper foil. At this time, the surface of the copper foil is golden yellow. After special treatment, the thermal discoloration resistance, oxidation resistance and cyanide resistance of copper foil in PCB manufacturing are improved accordingly.
Wenzhou Preferred Copper Foil Manufacturer
Copper foil is divided into calendered copper foil and electrolytic copper foil according to the preparation process, which accounts for the vast majority of the market. According to the Copper Foil Branch of China Electricity Association (CCFA), at present, domestic manufacturers mainly focus on the production of electrolytic copper foil. In 19 years, the domestic production capacity of electrolytic copper foil is expected to be close to 600000 tons, while that of rolled copper foil is only about 10000 tons.
Wenzhou Preferred Copper Foil Manufacturer
Excellent tensile strength and elongation High tensile strength and elongation under normal conditions can improve processing ability, enhance rigidity and avoid wrinkles to improve production qualification rate. High temperature extensibility (THE) copper foil and high tensile strength copper foil at high temperature can improve the thermal stability of printed boards and avoid deformation and warpage.
Wenzhou Preferred Copper Foil Manufacturer
Curing treatment: deposit a layer of dense metal copper in the nodular particle gap of the roughening layer, increase the contact surface between the roughening layer and the wool foil substrate, and reduce the roughness of the roughening layer surface. Microscopically, after rough surface roughening treatment, the foil surface is uneven and undulating greatly, while after curing treatment, the copper foil surface is relatively flat. After curing treatment, although the roughness is reduced, the bonding strength between the treatment layer and the insulating substrate material is improved due to the increased contact area between the roughened layer and the wool foil, which fundamentally eliminates the delamination between the treatment layer and the wool foil.
