JPS63190189A - Metal foil manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing metal foil of copper, copper alloy, nickel, etc.

(Prior Art) There are roughly two methods for producing metal foils such as copper, copper alloy, and nickel. One is the production of metal foil by electrolytic method, the other one is
One is the production of metal foil using a rolling method.

The method for manufacturing metal foil by electrolytic method is described in Shin Metal Materials Co., Ltd. CMC, January 25, 1985), pp. 133-134.
It is presented on page. This method is.

The foil raw material dissolved in a solution is electrolyzed in an electrolytic bath, and the surface of a drum is continuously plated into a foil shape, which is then rolled up to produce it.

The manufacturing method of metal foil by rolling method is described in Shin Metal Materials (CMC Co., Ltd., January 25, 1985), 131-13.
It is presented on page 2. This method involves rolling a metal material using a 2- to 4-high rolling mill.

(Problem to be solved by the invention°) The performance and properties of the product obtained by the electrolytic method are different from the performance and properties of the metal foil manufactured by the rolling method, and the use of the metal foil is different from that of the metal foil manufactured by the rolling method. It was limited. For example, metal foil manufactured by the electrolytic method is widely used for printed circuits of electronic and electrical parts, but due to durability etc., it is not suitable for parts that require strong repeated bendability, and metal foil manufactured by the rolling method is I had no choice but to use foil. However, metal foil produced by the rolling method has the drawback of high manufacturing cost due to its manufacturing process.

(Another Means to Solve the Problems) The present invention provides a method for manufacturing a metal foil that is manufactured by a rolling method and has the performance and properties of a clam metal foil, and that reduces manufacturing costs and is inexpensive.

That is, a metal strip having a thickness of 1.5 to 10 times that of the final product of metal foil is produced by an electrolytic method, and the metal strip is rolled to the final product by a rolling method.

(Function) The thickness of the metal strip manufactured by the electrolytic method is 1. If the thickness of this metal strip after rolling is t2, then 1. When /12 is 1°5 times, the surface roughness becomes significantly smaller, and 1+/12 becomes 2.
In the case of double the surface hardness, the surface hardness is equivalent to that of a metal foil manufactured only by the rolling method. Furthermore, its durability against bending is equivalent to or even more durable than metal foil manufactured solely by the rolling method.

(Example) Fig. 1 shows a comparison of conventionally rolled foil and electrolytically rolled foil in terms of surface roughness, Fig. 2 shows a comparison similar to the above in terms of surface hardness, and Fig. 3 shows a comparison using a cell resistance tester. 1 is a test piece.

FIGS. 4 and 5 are graphs of test results using the test apparatus shown in FIG. 3 under the following conditions.

Test conditions Bending speed: V = lO times/min Bending angle: U, = 90' Bending radius: r = 0.38 cm Put weight; w = 0.5. 1. oKy
r/- Figure 4 shows 1. /12 is 5.6 times, Figure 5 shows the case of 10 times, A is L direction (longitudinal direction), B is C direction (
(horizontal direction) are shown respectively. 1 is a rolled foil, and 2 is an electrolytic/rolled foil.

First, electrolytic copper foil was manufactured using the electrolytic plating method shown in Table 1, and rolled under the rolling conditions shown in Table 2 (hereinafter referred to as electrolytic/rolled foil). The properties were compared.

Table 1 As a result, as shown in Fig. 1, the surface roughness of the electrolyzed/rolled foil is 1.5%, where the thickness before rolling is ft, and the thickness after rolling is t2. /1. becomes significantly smaller than 1.5, and 1. When /12 was 5 or more, it was equivalent to rolled foil.

In terms of surface hardness, as shown in Figure 2, electrolytic/rolled foil has
As tl/12 increases, it increases linearly, which indicates good rolling properties, and t1/12 increases linearly.
When t2 was 2 or more, hardness equivalent to that of rolled foil was obtained.

For folding durability, samples of electrolytic/rolled foil and rolled foil as shown in Table 3 were prepared, and folding durability tests were conducted as shown in FIG. 3 to compare electrolytic/rolled foil and rolled foil.

Table 3 As a result, the results shown in FIGS. 4 and 5 were obtained.

According to this, 1. When /12 is 5.6, electrolytic/rolled foil gives better results than rolled foil; 1. It was found that when /12 was 10, there was almost no difference between the two.

As mentioned above, the surface roughness, surface hardness, and folding dust resistance were compared, and the electrolytic/rolled foil was 12/1. When is 1.5 or more, its performance and properties are improved, and when t, /12 is 5 to 1
0, it was proved that it is possible to reach the same level as rolled foil in all aspects.

In addition, 1. /1. It is clear that similar results can be obtained by increasing the value by 10 or more, but this only increases the number of rolling steps, which is not a good idea.

In addition, we also compared the mechanical properties such as tensile strength and elongation, and electrical conductivity, although the explanation is omitted here, and it was confirmed that the results were comparable to those of rolled foil.

(Effects of the Invention) As explained above, the present invention provides a method for producing metal foil made of copper, copper alloy, nickel, etc. by rolling an electrolytically plated metal strip. Dogs have the characteristics and have the effect of being inexpensive to manufacture.

[Brief explanation of the drawing]

Figure 1 is a comparison graph of conventionally rolled foil and electrolytic rolled foil in terms of surface roughness, Figure 2 is a comparison graph similar to the above in terms of surface hardness, Figure 3 is a schematic explanatory diagram of the folding dust resistance test device, and Figure 4 is a comparison graph of surface hardness.
Figures A and B and Figures 5A and B are graphs of the test results. Agent Patent Attorney Tatsuo Chanoki TF/12 Fig. 3 Fig. 4

Claims (1)

[Claims] In the production of metal foil such as copper, copper alloy, nickel, etc., a metal foil having a thickness of 1.5 to 10 times the final product of the metal foil is produced by an electrolytic method, and the metal foil is rolled to the final product. A method for producing metal foil, characterized by: