JPH0722772A - Conductive base material - Google Patents

Abstract

PURPOSE:To enhance the corrosion resistance, the contamination-resistant property, the wear-resistant property and the weatherability of a conductive base material which is used mainly to shield unwanted radiant electromagnetic waves. CONSTITUTION:In a conductive base material in which a conductive layer 2 has been formed on a fabriclike base material 1, a resin film 3 is formed on the conductive layer 2. Thereby, the conductive layer 2 which is exposed in conventional cases is protected by the resin film 3, the corrosion of the conductive layer 2 is prevented, and the contamination-resistant property, the wear- resistant property and the weatherability of the conductive base material are enhanced. In addition, when the resin film 3 is colored properly or patterned, the conductive base material can have a designing property.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive base material used for shielding unwanted electromagnetic radiation.

[0002]

2. Description of the Related Art In recent years, a conductive layer has been formed by depositing a metal such as copper, nickel or zinc on a woven substrate such as synthetic fiber or natural fiber by plating, vacuum deposition or chemical vapor deposition. The conductive base material is used to shield unnecessary radiation and electromagnetic waves from the ceiling and walls of buildings, to shield unnecessary radiation and electromagnetic waves from electronic devices and signal cables, electromagnetic radiation shielding curtains, portable shelters, and parabola antennas for satellite broadcasting. Widely used for radio wave reflection, shield type apron, etc. The conductive base material has conductivity due to the conductive layer, and since the base material is woven, it has good adhesion between the base material and the conductive layer, and further has flexibility and easily according to the location to be applied. Since it has features such as being able to cut, sew, and process, its range of use is expanded compared to a conductive base material made of a metal mesh or the like.

[0003]

However, since the conductive layer is exposed as it is in the conventional conductive substrate, discoloration or deterioration due to corrosion of the metal forming the conductive layer occurs in a short period of time, or where it is used. In some cases, there is a problem that the conductive layer is worn and the electromagnetic wave shielding effect is reduced, and the contamination resistance is poor. Further, the color tone of the conductive layer is also limited to the ground color of the above-mentioned metal forming the conductive layer, that is, gray and the like, and there is an aesthetic problem.

The present invention eliminates the above-mentioned problems of conventional conductive base materials and does not provide a conductive base material excellent in corrosion resistance, stain resistance, abrasion resistance and weather resistance. It is what

[0005]

In order to achieve the above object, the present invention has the following constitution. That is, the conductive base material according to the present invention is a conductive base material in which a conductive layer is formed on a woven base material, and a resin coating film is formed on the conductive layer.

In the conductive base material of the present invention, a resin coating is formed on the conductive layer to protect the conductive layer which has been conventionally exposed by the resin coating, thereby preventing corrosion of the conductive layer and preventing contamination. Of the resin film, the abrasion resistance, and the weather resistance of the resin film, and the resin film may be appropriately colored to have a design property.

The above-mentioned base material used in the present invention is not particularly limited in terms of material, shape and the like as long as it is a non-conductive material in the form of a woven fabric, but conventional synthetic materials such as polyester and acrylic resin are used. Woven fabrics made of fibers or natural fibers such as cotton and hemp, inorganic fibers such as glass fibers are preferably used, and general-purpose synthetic resins or inorganic sheets or films formed into a woven fabric, or synthetic into the above woven fabrics. It may be impregnated with a resin.

The conductive layer is made of a conductive metal such as a single metal such as copper, nickel, zinc, brass and aluminum, or a combination thereof, by a known method such as plating, vacuum deposition, chemical vapor deposition and the like. It is formed by depositing it on a base material.

The resin coating formed on the conductive layer is a resin coating containing an organic compound such as an acrylic resin, a urethane resin, a fluororesin, a vinyl chloride resin or an acrylic silicone resin as a main component, or an inorganic compound such as a silicone compound. It is formed by applying a resin coating material containing as a main component onto the conductive layer and solidifying it, or by adhering a resin sheet, film or the like on the conductive layer.

In the formation of the resin coating, if emphasis is placed on the improvement of stain resistance, it is preferable to form it with a resin coating containing a fluororesin or a silicone compound as a main component, and a sheet or film made of the fluororesin. It is also preferable to form. Further, if emphasis is placed on abrasion resistance, it is preferably formed from a resin coating containing a fluororesin as a main component, or a sheet or film made of a fluororesin. The fluorine compound used in the resin coating containing the fluororesin as a main component may be any of difluoride, trifluoride, and tetrafluoride, but with respect to abrasion resistance, trifluoride, Those containing tetrafluoride as the main component are excellent.

In the conductive substrate of the present invention, a conductive layer 2 is formed on one surface of the substrate 1 as shown in FIG. 1, and a resin coating 3 is formed on the conductive layer 2.
2 may be formed, or the conductive layer 2 may be formed on both front and back surfaces of the base material 1 as shown in FIG. 2, and the resin coating 3 may be formed on each of the conductive layers 2. The structure is not particularly limited as long as the resin coating 3 is formed on the conductive layer 3 and the conductive layer 3 is not exposed.

[0012]

In the conductive substrate of the present invention, since the resin coating is formed on the conductive layer formed on the substrate, the conductive layer which has been conventionally exposed is protected by the resin coating. Corrosion resistance, abrasion resistance, and weather resistance can be improved, and the resin coating can be appropriately colored or patterned to give it designability.

[0013]

EXAMPLES Specific examples will be described below based on examples of the present invention.

[0014] First, the substrate surface comprising a fabric of a polyester fiber, copper 15 g / m ^2, the total thickness of the forming the conductive layer by plating nickel 3.5 g / m ² (base material and the conductive layer 0. 3 mm), and a resin coating containing a fluororesin as a main component (Lumiflon made by Asahi Glass Co., Ltd.) is applied on the conductive layer to a thickness of 1
The conductive base material of the present invention of Example 1 having a resin coating film of 5 to 20 μm formed was obtained.

Next, the conductive substrate of the present invention of Example 2 was prepared in the same manner as in Example 1 except that the resin film was formed by sticking a 15 μm fluororesin film (manufactured by Central Glass Co., Ltd.). Obtained.

As a comparative example, a conventional conductive substrate was obtained in the same manner as in Example 1 except that the resin coating film was not formed.

The corrosion resistance, stain resistance, weather resistance, and abrasion resistance of the above Examples and Comparative Examples were examined, and the results are shown in Table 1.

The test method is as follows. Corrosion resistance: Observe for rust after 200 hours of salt spray test. Contamination resistance: A sample surface is contaminated with an oil-based black marking pen, and the sample surface is wiped off after being left for a specified time to observe the degree of contamination of the sample surface. Weather resistance: Observe the deterioration state of the sample surface after 500 hours of sunshine weatherometer. Abrasion resistance; 2 by Taber CS-10 at 500g load
The state of wear of the conductive layer after rubbing 0 times is observed.

[0019]

[Table 1]

As shown in Table 1 above, the conductive base material of the present invention according to Examples 1 and 2 has corrosion resistance, stain resistance, and
It can be confirmed that the weather resistance and abrasion resistance are all excellent.

[0021]

As described above in detail, in the conductive substrate of the present invention, the resin coating is formed on the conductive layer, so that the conductive layer which has been exposed in the past is protected by the resin coating, so that the conductive It is excellent in that the layer is prevented from being corroded and is excellent in stain resistance, abrasion resistance, and weather resistance, and that the resin film can be given a design property by being appropriately colored or patterned.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a conductive base material of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the conductive base material of the present invention.

[Explanation of symbols]

 1 Base Material 2 Conductive Layer 3 Resin Coating

Claims (1)

[Claims] 1. A conductive base material having a conductive layer formed on a woven base material, characterized in that a resin coating is formed on the conductive layer.