JPH11239603A - Wrinkled copper foil sheet and method for imparting antibacterial property using the same - Google Patents

Abstract

(57) [Summary] [Problem] To provide a sheet material for imparting antibacterial properties, which has excellent antibacterial action, is highly reliable, and can visually confirm the imparting of antibacterial action, and a method for imparting antibacterial properties to articles using the same. I do. A copper foil sheet having wrinkles on its surface, a copper foil sheet with a wrinkle comprising an adhesive layer provided on the back surface of the copper foil, a copper foil having wrinkles on its surface, and provided on the back surface of the copper foil A wrinkled copper foil sheet comprising a reinforcing layer is provided. The copper foil is preferably obtained by subjecting a copper foil having a thickness of 10 μm or more and 20 μm or less to wrinkling or graining. The surface of the copper foil may be colored, and the adhesive layer may contain an antioxidant for preventing copper damage. Further, an intermediate layer may be provided between the copper foil and the adhesive layer for mechanical reinforcement of the sheet. The antibacterial property is imparted by sticking the wrinkled copper foil sheet to the surface of the article via the adhesive layer. The reinforcing layer is preferably paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrinkled copper foil sheet, and more particularly to a wrinkled copper foil sheet which can be attached to the surface of an article touched by humans to impart antibacterial properties and a method of imparting antibacterial properties to articles using the same. About.

[0002]

2. Description of the Related Art It is well known that copper ions of copper or copper alloy have an antibacterial effect. 2. Description of the Related Art Conventionally, as an antibacterial measure for a part of an article, for example, a part touching a human hand, such as a handle part of a bag or door, a grip part of a telephone handset, a method of mixing several percent of an antibacterial material such as silver in a plastic material is known. Has been put to practical use.

[0003]

However, in this method, the antibacterial effect is not sufficient because the antibacterial material is present only in a form scattered on several percent of the surface. Also,
In terms of appearance, the presence of the antibacterial material could not be determined, and the antibacterial performance was liable to vary depending on the product, resulting in low reliability.

Accordingly, an object of the present invention is to provide a sheet material for imparting antibacterial properties which is excellent in antibacterial action, has high reliability, and which can be visually confirmed, and a method for imparting antibacterial properties to articles using the same. Is to provide.

[0005]

In order to achieve the above object, the present invention provides a wrinkled copper foil comprising a copper foil having a wrinkle on the surface and an adhesive layer provided on the back of the copper foil. Provide a foil sheet.

Further, the present invention provides a wrinkled copper foil sheet comprising a copper foil having a wrinkle on the surface and a reinforcing layer provided on the back surface of the copper foil.

The copper foil is preferably a copper foil having a thickness of 10 μm or more and 20 μm or less, which is subjected to a wrinkling process or a graining process.

[0008] The surface of the copper foil may be colored, and the adhesive layer may contain an antioxidant for preventing copper damage. Further, an intermediate layer may be provided between the copper foil and the adhesive layer for mechanical reinforcement of the sheet.

Further, the present invention provides a method for imparting antibacterial properties to an article by attaching the wrinkled copper foil sheet having the above-mentioned adhesive layer to the surface of the article via the adhesive layer,
Provided is a method for imparting antibacterial properties to a wall surface by attaching a wrinkled copper foil sheet having a reinforcing layer to the wall surface via the reinforcing layer.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a copper foil, a rolled copper foil or an electrolytic copper foil made of pure copper or a copper alloy can be used. Copper foil has a much higher antibacterial effect than conventional plastics containing an antibacterial material, and is highly reliable because the presence of the antibacterial material can be visually confirmed. The copper foil may be formed by a method such as copper plating thermal spraying, but it has disadvantages such as high cost for forming a thick layer and difficulty in an artificial coloring step described later.

[0011] The application of wrinkles to the copper foil not only gives flexibility to the copper foil and makes it easy to adhere to target articles of various shapes, but also makes the occurrence of wrinkles during mounting inconspicuous. Also,
The wrinkles themselves can express the delicate texture of the copper foil surface,
The aesthetic sense of the user can be satisfied.

The wrinkling of the copper foil can be performed by passing the copper foil through a rolling roll for wrinkling or graining. Skin grain is what is known as unevenness formed on the surface of leather or paper, and the wrinkles referred to in the present invention include this.

In consideration of wrinkle processing or wrinkle processing,
The thickness of the copper foil is preferably 10 μm or more and 20 μm or less. This is for the following reason.

(1) When used in a variety of applications, it is necessary to flexibly fit the shape of the article to be mounted. As a result of various experiments, the optimum size is 20 μm or less.

(2) When cutting and cutting into various shapes, the thickness which can be easily cut with ordinary scissors is 20.
μm or less.

(3) As a result of experiments on wrinkling and graining of copper foil, processing is difficult when the copper foil is thick, and it is difficult to produce a delicate texture. In this respect, the thickness is preferably 20 μm or less.

(4) The lower limit of the thickness of the copper foil is about 10 μm in terms of durability and mechanical strength in production.

The aesthetic appearance may be further enhanced by appropriately adding base patterns of various designs such as floral patterns in addition to wrinkles. In this case, the underlying pattern can be applied by passing the copper foil through a rolling roller for applying the underlying pattern at a stage before or after the rolling roll for wrinkling or graining.

The surface of the copper foil may be artificially colored using a known chemical coloring method or electrolytic coloring method, so that the appearance can be enhanced by the color. As an example of the chemical coloring method, there is a treatment liquid immersion method. For example, using a solution of Ebonol C Special manufactured by Meltech Co., Ltd., it can be colored in jet black by immersing it in a heated bath for a predetermined time and then washing with water. In addition, the company's Enplate MB-43
By using the solution in 8 and selecting the bath composition, black, brown, and reddish brown tones can be obtained. In addition, a known artificial patina method (in this case, there are a colorant application method and a spraying method).
Can also be colored green.

As the adhesive layer provided on the back surface of the copper foil, an acrylic adhesive, a rubber adhesive or the like can be used irrespective of the material, as long as it can adhere the wrinkled copper foil to the surface of the article. However, when there is a possibility that the adhesive layer may be deteriorated by copper ions eluted from the copper foil, it is preferable to include an appropriate antioxidant for preventing copper damage. As an example of this antioxidant, UBE Polypro J109U manufactured by Ube Industries, Ltd.
B can be suitably used.

When an improvement in tensile strength is required depending on the use, it is preferable to provide an intermediate layer for mechanical reinforcement between the copper foil and the adhesive layer. For this intermediate layer, a polyethylene film or the like can be used.

Various materials can be considered as the reinforcing layer provided on the back surface of the copper foil, but when it is attached to a wall surface, paper used as ordinary wallpaper is preferable.

The wrinkled copper foil sheet of the present invention may be a long sheet, a strip-like sheet obtained by cutting such a sheet, or a small sticker obtained by pressing these sheets into a predetermined shape. Including sheets.

Articles to which the present invention is applied include writing instruments such as pencils, ballpoint pens and fountain pens, telephones, mouses for personal computers, switch buttons for various devices, door handles, taps or handles for water supplies, handrails for escalators, and train straps. , Bag handles, edges of the sink and drain holes, bathroom floor (in this case it also functions as a non-slip in the bathroom)
A ceiling, a drain hole, and a bottom of a bathtub (which also functions as a non-slip in the bathtub) can be mentioned.

[0025]

The wrinkled copper foil sheet of the present invention is described below.
An embodiment will be described with reference to the drawings.

FIG. 1 is an example showing an embodiment of the present invention, and shows a copper foil sheet 10 having a surface provided with wrinkles 11. FIG. 2 is a cross-sectional view of the copper foil sheet 10. The adhesive layer 2 having a thickness of about 0.6 mm and the release sheet 3 are provided on the back surface of a copper foil 1 having a thickness of 0.017 mm (17 μm) provided with wrinkles 11. It is provided. Although not shown, the copper foil surface portion where the wrinkles 11 are not formed may be subjected to a graining process.

Wrinkling or graining of the copper foil 1
This is performed by passing a rolled copper foil through a roll for wrinkling or graining. By bonding the adhesive layer 2 provided with the release sheet 3 on the back surface to the copper foil 1 on which the wrinkles 11 or the unillustrated leather grain is formed, a wrinkled copper foil sheet 10 shown in FIG. 2 is obtained. The copper foil 1 is in close contact with the adhesive layer 2,
At the time of use, by peeling off the release sheet 3, it can be easily attached to the target article.

As described above, when there is a possibility that the adhesive layer 2 may be deteriorated by copper ions eluted from the copper foil 1, an antioxidant for preventing copper damage, for example, UBE Polypro J109UB manufactured by Ube Industries, Ltd. is added to the adhesive layer. To be included. The copper foil 1 may be artificially colored. For example, a solution of Ebonol C Special manufactured by Meltech Co., Ltd.
The copper foil is immersed in a bath heated to ℃ and boiled for 15 to 20 minutes, and then sufficiently washed with water. Thereby, the surface of the copper foil 1 is colored in lacquer black, and a beautiful texture can be obtained.

FIG. 3 is an example showing another embodiment of the present invention, and only a cross-sectional view is shown. A reinforcing layer 4 made of paper is provided on the back surface of a copper foil 1 having a thickness of 0.017 mm (17 μm) with wrinkles 11 formed on the surface. This wrinkled copper foil sheet 20 is suitable to be attached to a wall surface in the same manner as wallpaper, and the paste for wallpaper is applied to the reinforcing layer 4 on the back surface, that is, the surface of the paper sheet, and can be attached to the wall surface.

[0030]

According to the present invention, a copper foil sheet having a wrinkle on its surface and an adhesive layer provided on the back surface of the copper foil or a copper foil sheet having a wrinkle on its surface, Since it is a wrinkled copper foil sheet consisting of a reinforcing layer provided on the back surface of the foil, it has excellent antibacterial action, its reliability is high, and the sheet material for imparting antibacterial action can be visually confirmed. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a wrinkled copper foil sheet according to the present invention.

FIG. 2 is an enlarged sectional view showing an example of a copper foil sheet with wrinkles according to the present invention.

FIG. 3 is an enlarged sectional view showing another example of the copper foil sheet with wrinkles according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copper foil 2 Adhesive layer 3 Release sheet 4 Reinforcement layer 10, 20 Wrinkled copper foil sheet 11 Wrinkle

Claims (9)

[Claims] 1. A wrinkled copper foil sheet comprising a copper foil having wrinkles on its surface and an adhesive layer provided on the back surface of said copper foil. 2. A wrinkled copper foil sheet comprising a copper foil having a wrinkle on a surface and a reinforcing layer provided on a back surface of the copper foil. 3. The wrinkled copper foil sheet according to claim 1, wherein the copper foil is a copper foil having a thickness of 10 μm or more and 20 μm or less and subjected to wrinkling or graining. 4. The wrinkled copper foil sheet according to claim 1, wherein the surface of the copper foil is colored. 5. The wrinkled copper foil sheet according to claim 1, wherein the pressure-sensitive adhesive layer contains an antioxidant. 6. The wrinkled copper foil sheet according to claim 1, wherein an intermediate layer for mechanical reinforcement is provided between the copper foil and the adhesive layer. 7. The wrinkled copper foil sheet according to claim 2, wherein said reinforcing layer is made of paper. 8. A wrinkled copper foil sheet comprising a copper foil having wrinkles on its surface and an adhesive layer provided on the back surface of said copper foil, is attached to the surface of the article via said adhesive layer. A method for imparting antibacterial properties to articles. 9. A wrinkled copper foil sheet comprising a copper foil having wrinkles on its surface and a reinforcing layer provided on the back surface of said copper foil is attached to a wall surface via said reinforcing layer. Method for imparting antibacterial properties.