| 摘要 |
PURPOSE:To obtain copper foil showing high tensile strength and elongation at ordinary and high temps. and having satisfactory bending resistance by carrying out electrolysis with an electrolytic soln. contg. a certain amount of an electrolytic soln. immediately after treatment with activated carbon. CONSTITUTION:Part of an electrolytic soln. fed from an electrolytic soln. feeding line 1 is treated with activated carbon by passing through a column 2 packed with activated carbon. The remaining electrolytic soln. is allowed to join the treated electrolytic soln. and introduced into an electrolytic cell 3 provided with a cathode drum 4 and insoluble anodes 5 within 20min after the treatment to carry out electrolysis. The amount of the treated electrolytic soln. is >=60vol% of the total amount. Electrolytic copper foil 6 deposited on the cathode drum 4 by the electrolysis is stripped and recovered. Thus, copper foil having superior mechanical properties, high hot elongation and satisfactory bending resistance after heating is obtd. |
