JPS6021374Y2 - Sealing sheet to prevent unauthorized opening - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing sheet for preventing unauthorized opening of various packages.

2. Description of the Related Art The unsealed part of various packages, for example, the abutting part of flaps in a cardboard case, is usually sealed with adhesive packaging tape 1, abbreviated as duct tape, as shown in FIG.

However, the adhesive component of such packaging tape 1 is
It is made of acrylic resin and starch, and water is used as a solvent when applying the adhesive, so it is relatively easy to peel off with water or steam, and it is difficult to obtain products of the same standard. Because it is easy to do so, packages may be intentionally opened or resealed during transportation or storage without permission.
This has the problem that it may be resealed using packaging tape of the same standard.

In order to deal with this problem, a measure has recently been adopted in which a tape 2 with pictures or letters displaying a predetermined mark is pasted crosswise on the packaging tape 1 in order to prevent the packaging tape 1 from being peeled off without permission. It is being done.

The conventional tape 2 with pictures or letters used for this purpose has pictures or letters printed on the back side of the plastic film that forms the front surface, and also has a release layer mainly composed of silicone. Then, a metal vapor deposited layer is formed on top of the metal vapor deposited layer, a sticky adhesive is applied to the back side of the vapor deposited layer, and a release paper is pasted on the metal vapor deposited layer, so that it cannot be easily obtained by a third party. , can be expected to be quite effective in preventing unauthorized opening.

However, since the tape with the above structure uses a silicone-based material as the adhesive layer of the plastic film on the surface, it is relatively easy to peel off, and the shape of the plastic film is not disturbed. Therefore, even if the plastic film is peeled off and the letters or pictures are missing from the vapor deposited layer, it can be resealed with the packaging tape 1 after peeling off the vapor deposition layer and packaging tape 1 and opening the package. death,
It is not impossible to restore the film by pasting it on the original position of the peeled vapor-deposited layer and then matching the plastic film on the front side by matching pictures or letters, and since the point of restoration lies in matching pictures or letters. , to the original state,
It is easy to guess the relative position, so such tapes are not foolproof.

The present invention provides a sealing tape or label (hereinafter referred to as a sealing sheet) that is almost impossible to recover and reseal once it is peeled off. Transparent resin or cellophane film 1
Appropriate pictograms or characters are printed on the back side of 0 to form a printed layer 11, and a release agent with stronger adhesive strength than silicone resin, etc., which is generally used as a mold release agent, is applied to the printed layer 11 side. A metal vapor deposition layer 13 is formed through the layer 12, and a pressure-sensitive adhesive layer or a hot melt adhesive layer 14 is provided on the back side of the vapor deposition layer 13 to form a sealing sheet 15.

Peeling layer 1 with stronger adhesive strength than the silicone resin mentioned above
For example, acrylic resin, cellulose acetate, or a suitable blend of these is suitable as 2.

The adhesion strength of each layer of this sealing sheet is as follows.

That is, the adhesion strength of numbers 10 and 11 is approximately 300 g/15
Order code 11 and 12 〃 Approximately 2009 / 151
rayt code 12 and 13 〃 approx. 50f/ /
15mm code 13 and 14 〃 Approx. 100g/1
5rrgrL Since the adhesion strength between code 14 and the object to be adhered is 300 f/15mm or more, the parts with the lowest adhesion strength are codes 12 and 1.
It is between 3.

Therefore, when trying to remove the sealing tape, use the code 12.
It is natural that the interface between
A phenomenon occurs in which the vapor-deposited layer is cut off in certain parts.

This is the cause of the bulging condition shown in FIG.

In addition, when the back surface of the vapor deposition layer 13 is formed with the tacky adhesive layer 14, a release paper 16 is attached and the release paper 16 can of course be peeled off before use.

Further, the thickness of the vapor deposited layer 13 described above is preferably kept extremely thin, about 300 to 500 Å, in order to carry out the functions of the present invention described later.

In this way, the sealing sheet 15 according to the present invention has a printed layer 11 on the back side of the transparent film 10, and a release layer 12 with strong adhesive strength made of acrylic resin, cellulose acetate, or a blend of these on the printed layer 11 side. A metal vapor deposition layer 13 is formed through the metal vapor deposition layer 13, and an adhesive adhesive layer or hot melt adhesive layer 14 is provided on the back surface of the vapor deposition layer 13.
If this is made into a tape or a label and is pasted on the unsealed part of the package as shown in FIG. 1, it becomes a seal that is almost impossible to peel off and recover.

That is, if a third party peels off the sealing sheet 15 in an attempt to open the package without permission during transportation or storage of the package,
Since the adhesive layer 14 that directly adheres to the package adheres fairly strongly to the surface of paper packaging materials such as cardboard sheets, first the transparent film layer 14 having the printed layer 11 on the back side is used. It will peel off from between the layer 10 and the vapor deposited layer 13.

However, in the present invention, an acrylic resin, a cellulose acetate resin, or a blend of these resins, which has a higher adhesion strength than the commonly used silicone mold release agent, is used as the mold release agent interposed in both layers. Since it is used as a molding agent, only the part of the release layer 12 is not separated from the vapor deposited layer 13 and the strength of the vapor deposited layer 13 is relatively small, as shown in FIGS. 3 and 4. Peeling layer 12
A part of the vapor deposited layer 13 is peeled off while still being adhered, and a part of the vapor deposited layer 13 remains on the tacky adhesive layer or the hot melt adhesive layer 14 irregularly and thickly.

Therefore, it is extremely difficult to restore such a peeled form to its original state, and even if it is intentionally reattached, it can be identified at a glance.

Furthermore, since the release layer 12 is not adhesive and has stronger adhesive force than a silicone-based release agent, the morphology of the film layer 10 and vapor deposited layer 13 is easily disturbed when it is peeled off, making the regeneration and restoration work extremely difficult. It is impossible to peel off the top so that it can be restored, and it is extremely effective in preventing unauthorized opening.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of preventing unauthorized opening of packages;
4 to 4 show examples of the sheet of the present invention, FIG. 2 is an enlarged sectional view, and FIGS. 3 and 4 are enlarged sectional views and plan views showing the peeled state. . DESCRIPTION OF SYMBOLS 10... Transparent film, 11... Printing layer, 12... Peeling layer, 13... Metal vapor deposition layer, 14... Adhesiveness Adhesive layer or hot melt adhesive layer.

Claims (1)

[Scope of utility model registration request] A printed layer 11 is formed on the back side of the transparent film 10, and a metal vapor deposited layer 13 is formed on the side of the printed layer 11 via a release layer 12 with strong adhesive strength made of acrylic resin, cellulose acetate resin, or a blend of these. A sealing sheet for preventing unauthorized tampering is provided with a sticky adhesive layer or hot melt adhesive 14 on the back side of the vapor deposited layer 13.