JPH08100288A - Manufacturing method of metal mesh foil - Google Patents

Abstract

(57) [Summary] [Purpose] To manufacture a metal foil having a mesh pattern that is inexpensive and can be elongated. [Structure] A plating layer is formed by electroplating on a metal drum in which an insulating material is embedded in a predetermined pattern on the outer peripheral surface, and the range from the place where the plating layer is exposed in the air to the peeling interface is formed. A method for producing a metal mesh foil, which comprises washing the plating layer and the surface with cold water at 0 ° C to 15 ° C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal mesh foil having a large number of holes in a metal foil in a predetermined pattern.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a metal mesh foil, (1) a method of forming holes by etching a metal foil.
(2) A method of forming a master mesh pattern of a conductive material on an insulating substrate, electroplating the master mesh pattern on the master mesh pattern to form a metal mesh layer, and peeling the layer to obtain a metal mesh foil. (3) A method of obtaining a metal mesh foil by forming a non-plated pattern portion of an insulating material such as photoresist on a conductive substrate and then electroplating the metal mesh layer to form a metal mesh layer, and peeling off the layer. (4) A metal mesh foil is formed by forming a concave portion on a conductive substrate, forming a mesh pattern by filling the concave portion with an insulating material, and then electroplating to form a metal mesh layer, and peeling off the layer. There is a method to obtain.

The above method (1) is a particularly effective means when the area to be removed by etching is small, but the manufacturing cost is high due to the problems of processing etching resist and etching waste liquid. The method of (2) can produce a metal foil of 400 to 500 mesh, but when peeling the metal foil from the insulating substrate, the master mesh pattern is destroyed, and in order to make the foil next, a new pattern is required. It needs to be reformed.
Therefore, only sheet-shaped foil can be manufactured, and the cost is high. The method of (3) can produce only a sheet-like foil for the same reason as (2), and is expensive. In the method (4), the mesh pattern is not destroyed due to the peeling of the foil because it is embedded in the recess of the base of the insulating material. Therefore,
A continuous (endless) metal mesh foil can be easily manufactured. However, when the mesh layer is peeled off from the conductive substrate during the production of the foil, the embedded insulating material may fall out of the substrate while being stuck to the mesh layer, and the mesh foil may have pores clogged or the foil may not be formed. It has the problem of breaking.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem (4), and provides a method for producing a continuous metal mesh foil which is long and inexpensive. The purpose is to do.

[0005]

As a means for solving the above-mentioned problems, the present invention embeds an insulating material in a predetermined pattern on the outer peripheral surface of a metal drum and rotates the drum at a constant speed. In the method for producing a metal mesh foil by forming a metal layer having a predetermined thickness by electroplating and peeling the metal layer from the outer peripheral surface of the drum, where the metal foil comes out of the plating solution into the air. The method for producing a metal mesh foil is characterized in that the range from to the peeling interface between the foil and the drum is washed and cooled with cold water at 0 to 15 ° C.

According to the present invention, the metal drum, the insulating material, and the metal foil that generate heat during electroplating are washed and cooled, and the adhesion between the foil and the insulating material and the foil and the drum is extremely reduced. It is possible to manufacture the metal mesh foil continuously and for a long time without the insulating material embedded at the time of peeling coming off.

An example of the present invention will be described below with reference to FIG. An anode 2 is provided at the bottom of the electrolytic cell 1, and a metal drum 4 in which an insulating material is embedded in a predetermined pattern is arranged on the top of the anode 2 so as to be horizontally rotatable. The plating solution 3 is supplied to the electrolytic bath 1 to a predetermined height. When a current is passed as a cathode while rotating the metal drum 4 at a constant speed, the metal reduced from the plating solution is deposited to a predetermined thickness on the outer peripheral surface of the drum 4. The metal mesh foil 8 exposed from the plating solution to the air together with the outer peripheral surface of the drum 4 is a cold water shower 6 and a shielding plate 7 provided to prevent the cold water from mixing with the plating solution.
It is cooled and washed in between and wound up.

Although heat generation during electroplating is generally known, without the cold water process of the present invention, the metal drum, insulating material and metal foil that generated heat during electroplating may be exposed to air. However, the metal foil is peeled off from the drum while the temperature does not drop so much. It is particularly remarkable when the plating solution is at a high temperature. Epoxy resin or vinyl resin is generally used as the insulating material, but the resin does not use high heat-resistant resin because it obtains adhesion to the metal drum. Therefore, it is considered to be in a softened state at high temperature. Then, the metal plating layer is initially deposited on the conductive portion, but it leaches into the insulating portion with the plating time (wrapping around), and the metal plating layer is overlaid on the embedded resin. . When the resin is in a softened state, there is no gap between the plating layer and the resin, and a very large adhesive force is exerted. When the metal plating layer is peeled off from the outer peripheral surface of the drum,
Due to the adhesion, the phenomenon of resin falling off from the metal drum occurs.

When the cooling / washing step of the present invention is provided, the resin and the metal plating layer are rapidly cooled when the metal plating layer is peeled off, and a gap is generated between the plating layer and the resin due to the difference in the cooling rate between them. A large reduction in adhesion can be achieved, the embedded resin does not fall out of the metal drum, and the continuous metal mesh foil that does not block the mesh holes can be manufactured for a long time at low cost. became.

[0010]

【Example】

Example (1) A drum having a diameter of 300 mm was used and 20 μm under the following conditions.
A nickel mesh foil having a thickness of 40 mesh and hexagonal holes was obtained. Drum rotation speed 25mm / min Plating solution Nickel sulfamate 350g / l Boric acid 40g / l pH 5 Temperature 50 ° C Current density 5A / dm ² Cold water temperature 15 ° C Embedded resin Epoxy resin Example (2) Cold water of Example (1) Only the temperature was 5 ° C., and a nickel mesh foil having a thickness of 20 μm was obtained. Comparative Example (1) Using water having a temperature of 20 to 25 ° C. (room temperature) in Example (1), a nickel mesh foil having a thickness of 20 μm was obtained. Comparative Example (2) In Example (1), the cold water step was omitted.

In the above-mentioned Examples and Comparative Examples, Table 1 shows the foil lengths until the epoxy resin embedded in the metal drum comes off from the drum.

[0012]

[Table 1]

As described above, according to the present invention, it is understood that the embedded resin is unlikely to fall out. The present invention can be applied to all metals that can be electroplated, and is not limited to the examples.

[0014]

By applying cold water, the adhesion between the metal plating layer and the insulating material is reduced, the embedded insulating material does not fall out of the metal drum, and a long and inexpensive metal mesh foil is obtained. It can be manufactured continuously.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a metal mesh foil manufacturing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1: Electrolytic tank 2: Anode 3: Plating solution 4: Metal drum 5: Insulating material (epoxy resin) 6: Cold water supply device 7: Shielding plate 8: Metal mesh foil

Claims (1)

[Claims] 1. A metal plating layer is formed by electroplating a metal drum having an insulating material embedded in a predetermined pattern on the outer peripheral surface while rotating at a constant speed, and peeling from the outer peripheral surface of the drum. In the method for producing a continuous metal mesh foil, the metal mesh layer and the drum are cooled with cold water at 0 ° C to 15 ° C in the range from the place where the metal plating layer is exposed to the air in the plating solution to the interface where it is peeled from the drum. A method for producing a metal mesh foil, which comprises cleaning the surface.