JPH08309956A - Silk screen frame-reinforcing tape - Google Patents

Abstract

PURPOSE: To obtain a silk screen frame-reinforcing tape having small metal and adhesive residues even in the case of releasing after the tape is laminated and scarcely lowering the adhesive strength with small change of color tone of a silver layer even by the lapse of time. CONSTITUTION: The silk screen frame reinforcing tape comprises a silver resin layer 2 and an adhesive layer 5 provided between to plastic films 1 and 3, and an adhesive layer 4 provided on the opposite side surface of the one film 3 to the layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame reinforcing tape for a screen printing plate.

[0002]

2. Description of the Related Art Conventionally, screen printing has been used for various purposes such as posters, signboards, displays, clothes, instrument scales and printed circuits. A screen frame on which a screen gauze is stretched is used for screen printing. As a method for fixing the gauze to the frame, an adhesive method is generally adopted.

In recent years, the strength of the gauze and the strength of the frame have been improved so that the gauze is stretched with a considerably high tension, and the gauze may be peeled off by the solvent in the ink during printing or the solvent during washing. is there. In order to prevent such peeling of the gauze, a silk screen frame reinforcing tape in which an aluminum vapor deposition film (silver layer) and an adhesive layer are sequentially laminated is attached to one surface of a plastic film.

However, there is a problem that such a tape is peeled off from the aluminum vapor deposition film when it is peeled off after sticking, and the aluminum vapor deposition film and the adhesive remain on the screen frame. Further, there have been problems that the color tone of the aluminum film changes and the adhesive strength decreases with the passage of time.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, there is no metal or adhesive residue even after peeling after tape application, and the change in the color tone of the silver layer is small over time, and the adhesive strength is reduced. The purpose is to obtain a difficult silk screen frame reinforcing tape.

As a result of various studies on this problem, the present inventor has found that the adhesive force at the interface of the aluminum vapor deposition film is not stable, and the adhesive agent adjacent to the aluminum vapor deposition film may corrode aluminum. , I thought that such a problem might occur. The present invention has been made based on such findings.

[0007]

That is, the silk screen frame reinforcing tape of the present invention is provided with a silver resin layer between two plastic films, and the one plastic film is provided on the surface opposite to the silver resin layer. A structure in which an adhesive layer is provided, or a structure in which a silver resin layer and an adhesive layer are provided between two plastic films and an adhesive layer is provided on the opposite surface of the one plastic film from the silver resin layer By doing so, the conventional drawbacks can be overcome.

The present invention will be described in detail below.

As the plastic films 1 and 3 used in the present invention, films of polyester, polyethylene, polypropylene, polycarbonate, nylon and the like are used. A thickness of about 5 μm to 50 μm is suitable in terms of workability of sticking. It is also possible to roughen the plastic film in order to obtain a matte rather than a metallic luster.

The silver-colored resin layer 2 can be formed by dispersing a metal powder in a film-forming resin.
Aluminum is usually used as the metal powder for this purpose. The thickness of the silver resin layer 2 is 1 μm to 10 μm.
About m is preferable. When the silk screen frame reinforcing tape is used by adhering onto the photosensitive film before exposure, the thickness is adjusted so that the actinic ray of the photosensitive film can be transmitted. By doing so, since the photosensitive film under the tape is also exposed when the photosensitive film is exposed, the photosensitive film does not elute during plate cleaning. Corrosion of the metal vapor deposition film is not a problem because the metal vapor deposition film is not used conventionally.

The adhesive layer 5 is a layer necessary for bonding two plastic films together. As the adhesive used for the adhesive layer 5, any of pressure sensitive type, hot melt type, solvent type and the like can be used, but a pressure sensitive type adhesive is preferable for convenience of handling. The thickness of the adhesive layer 5 is 1 μm to 10 μm.
About μm is preferable.

The adhesive layer 5 can be omitted if the silver resin layer 2 is made of an adhesive resin that can bond two plastic films together.

For the pressure-sensitive adhesive layer 4, various pressure-sensitive, hot-melt type, solvent-type pressure-sensitive adhesives and adhesives can be used, but a pressure-sensitive pressure-sensitive adhesive is preferred for ease of handling. The thickness of the pressure-sensitive adhesive layer 4 is preferably about 5 μm to 100 μm. A release paper is laminated on the pressure-sensitive adhesive layer 4 if necessary.

Such a silk screen frame reinforcing tape is usually used in the form of a roll, but in order to facilitate rewinding or peeling, a plastic film, a release paper or the like can be appropriately subjected to a release treatment. .

[0015]

EXAMPLES The present invention will be described below based on examples.
In the examples, “%” and “parts” are based on weight unless otherwise specified.

The following silver-colored resin layer coating material was applied to one side of a 12 μm-thick polyester film with a bar coater to a dry thickness of 3 μm and dried.

[Silver resin layer paint] ・ Silver paste (solid content 65%) 5 parts (Alpaste 0200T: Toyo Aluminum Co., Ltd.) ・ Saturated polyester resin 5 parts (Byron # 200: Toyobo Co., Ltd.) ・ Toluene 70 parts ・ Methyl ethyl ketone 20 copies

Next, the following adhesive layer paint was applied on the silver resin layer by a bar coater so that the dry thickness was 4 μm,
Dried.

[Adhesive layer paint] ・ Saturated polyester resin 10 parts (Vylon # 300: Toyobo Co., Ltd.) ・ Butyl acetate 10 parts ・ Ethyl acetate 10 parts ・ Curing agent (solid content 75%) 1 part (Coronate L: Nippon Polyurethane) (Industrial company)

Next, a polyester film having a thickness of 12 μm is attached to the adhesive layer, and the following adhesive layer paint is applied on the polyester film by a bar coater so that the dry thickness becomes 20 μm, and then dried and silk screened. A frame reinforcing tape was obtained.

[Adhesive layer paint] 50 parts of acrylic adhesive (solid content 40%) (Olivein BPS1109: Toyo Ink Mfg. Co., Ltd.) 50 parts of ethyl acetate

When this silk screen frame reinforcing tape was attached to a gauze frame and 10000 sheets were printed,
There was no peeling of the tape. When this was left indoors for 3 months and then the tape was peeled off, it could be peeled off neatly without leaving an adhesive or the like on the frame. In addition, there was no change in the color tone of the tape.

[0023]

In the silk screen frame reinforcing tape of the present invention, since the silver resin layer is sandwiched between the two plastic films, the scratch of the silver layer does not pose a problem, and the silver layer and the There is no problem that the adhesive remains on the screen frame. Further, since the vapor deposition film is not used, there is no problem that the color tone of the silver layer changes with time and the adhesive strength decreases.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a silk screen frame reinforcing tape of the present invention.

[Explanation of symbols]

 1, 3 ... Plastic film 2 ... Silver resin layer 4 ... Adhesive layer 5 ... Adhesive layer

Claims (2)

[Claims] 1. A silk screen frame reinforcing tape comprising a silver resin layer provided between two plastic films, and an adhesive layer provided on a surface of the one plastic film opposite to the silver resin layer. . 2. A silver resin layer and an adhesive layer are provided between two plastic films, and an adhesive layer is provided on the opposite surface of the one plastic film from the silver resin layer. 1. The silk screen frame reinforcing tape according to 1.