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Method for removing rolling oil from double surfaces of rolled copper foil

A technology of rolling copper foil and rolling oil, which is applied in the direction of metal rolling, metal rolling, and workpiece surface treatment equipment, etc., can solve the problems of easy oxidation of rolled copper foil, low efficiency, and slow line speed, etc., and improve labor efficiency. Productivity, enhancement of degreasing effect, and effect of reducing production cost

Active Publication Date: 2012-08-01
中铜华中铜业有限公司
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AI Technical Summary

Problems solved by technology

Therefore, the previous degreasing process of rolled copper foil is not only theoretically inefficient for the degreasing process of degreasing machine trains in the form of assembly line operation for rolled copper foil with a roll length of thousands or even tens of thousands of meters. , and it is difficult to achieve continuous high-efficiency production; moreover, there are also adverse factors such as the easy oxidation of the rolled copper foil during the degreasing process due to the slow line speed
[0005] Since the degreasing process of this kind of rolled copper foil is not yet mature, the degreasing effect is poor, the efficiency is low, and it is difficult to achieve the desired effect, so how to research and develop an efficient degreasing process of rolled copper foil is of great significance

Method used

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  • Method for removing rolling oil from double surfaces of rolled copper foil

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Embodiment 1

[0047] (1) Ultrasonic alkaline degreasing; (≥22KHz)

[0048] Alkaline special degreasing agent: mixed lye with sodium hydroxide and sodium carbonate, and added OP emulsifier non-ionic surfactant. The solution ratio is: NaOH: 50g / l; Na 2 CO 3 : 20g / l; OP emulsifier: 2g / l.

[0049] Solution temperature: room temperature

[0050] Solution flow: 1 ~ 3M 3 / Hr

[0051] (2) 1# ultrasonic pure water washing; (≥22KHz)

[0052] Conductivity≤50μs / cm, water volume 1M 3 / Hr. Dip + spray form

[0053] (3) Ultrasonic acid degreasing; (ultrasonic frequency: ≥22KHz)

[0054] Sulfuric acid: 8% (weight percent concentration)

[0055] OP emulsifier (non-ionic surfactant): 2 g / l.

[0056] Flow: 1~3M 3 / Hr

[0057] Solution temperature: room temperature

[0058] Adopt separate circulation system, three-stage clapboard landing tank for oil filtration and heating filtration.

[0059] (4) 2# ultrasonic pure water washing (≥22KHz)

[0060] Conductivity≤50μs / cm, water volume 1M 3 / Hr. ...

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Abstract

The invention relates to a method for removing rolling oil from double surfaces of a rolled copper foil. The method for removing rolling oil from double surfaces of a rolled copper foil comprises the following steps: 1, degreasing with an alkaline aqueous solution under supersonic wave, and then washing with purified water under the supersonic wave; 2, degreasing with an acidic aqueous solution under the supersonic wave, and then washing with the purified water under the supersonic wave; 3, anodizing to degrease, and then washing with the purified water; and 4, carrying out autotherimic processing, and washing with the purified water. The method of the invention, which subverts traditional degreasing methods with low efficiencies, avoids defects of complex process, low cost, low safety factor and the like of degreasing and washing methods using current advanced organic degreasing agents, and reaches purposes of degreasing effect enhancement, labor productivity improvement, and production cost reduction.

Description

technical field [0001] The invention relates to the technical field of double-surface inorganic degreasing method of rolled copper foil. Background technique [0002] Whether it is rolled copper foil or electrolytic copper foil, it is unquestionable that it is widely used in the electronics industry. Compared with electrolytic copper foil, calendered copper foil has greater advantages and broader prospects in terms of physical properties such as elongation, tensile strength, and electrical properties. However, due to the inherent characteristics of the rolled copper foil itself in the production and rolling process, it is determined that a large amount of rolling oil film is attached to its double surface, and the oil content of its double surface can reach 5mg / M 2 The above has seriously affected the requirements of its products from the factory and the subsequent chemical and electrochemical surface treatment procedures, which are the bottlenecks for its wider application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/00B21B45/02
Inventor 许春许铨伟范君良
Owner 中铜华中铜业有限公司
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