JP6848237B2 - Packaging box and packaging - Google Patents

Description

The present invention relates to a packaging box, particularly a cosmetic box for storing a high-class article to which an RFID tag is attached, which has an appearance with metallic luster, and a packaging body using the same.

As a cosmetic box for storing expensive items such as high-class liquor and cosmetics, aluminum foil paper with aluminum foil bonded to the surface of the paper or metal vapor deposition film with metal such as aluminum deposited on the mount is bonded to aluminum foil. High-grade paper boxes made of paper or the like are used.

On the other hand, in the case of expensive items, RFID tags may be attached to the contents of the items in order to prevent counterfeiting and tampering, but in the case of boxes using aluminum foil paper or aluminum-deposited paper, the boxes In some cases, the weak electromagnetic waves emitted by the RFID tag in response to the electromagnetic waves from the outside of the box are shielded by the metal layer of these boxes, and the RFID tag does not function.

The reason why electromagnetic waves are shielded is that these aluminum foils and aluminum-deposited layers act as electrically conductive layers having a continuous length. Therefore, as a means for shortening the electrical conduction path, it has been considered to use a printing layer made of silver ink using an aluminum pigment instead of an aluminum foil or an aluminum vapor deposition layer. However, in the conventional ink layer using an aluminum pigment, it has been considered. There is a problem that a sufficient metallic luster comparable to that of an aluminum foil or an aluminum vapor-deposited layer cannot be obtained.

The packaging material described in Patent Document 1 provides a packaging material having a higher glossiness by providing an ionizing radiation curable resin layer on a base material when providing a glossy printing layer containing a metal pigment or the like. It is what we are trying to provide.

However, in order to produce such a printed matter, it is necessary to install an ionizing radiation curing device for the first color in the multicolor printing machine, so that it cannot be produced by a general printing machine.

JP-A-2015-160664

The problem to be solved by the present invention is to propose a packaging box having a high metallic luster, which can be manufactured by a general printing machine and does not impair its function even when an RFID tag is included. Is what you do.

As a means for solving the above problems, the invention according to claim 1 includes a transparent printing base film having smooth front and back surfaces, a printing layer containing an aluminum pigment, an adhesive layer, and a paper layer in this order. A packaging box made by molding paperboard, the particle size of the aluminum pigment is 20 μm or less, and the thickness of a piece of aluminum pigment is 50 nm or less.
The printing layer containing the aluminum pigment is a packaging box characterized by being composed of independent halftone dots.

Since the packaging box according to the present invention is provided with a printing layer containing a special aluminum pigment on the back surface of a smooth transparent printing base film, it has a metallic luster comparable to that of aluminum foil and does not shield high frequencies.

Further, the invention according to claim 2 is applied to the article stored in the packaging box according to claim 1.
It is a packaging body to which a FID tag is attached and the tag information can be read from the outside of the box without opening the box.

In the packaging box according to the present invention, a printing layer containing an aluminum pigment is provided on the back surface of a transparent printing base film having smooth front and back surfaces, the particle size of the aluminum pigment is 20 μm or less, and the thickness of one piece of the aluminum pigment is adjusted. Since it is set to 50 nm or less, the high brightness feeling of the aluminum pigment is fully exhibited, and the weak radio wave emitted by the RFID tag is not blocked.

This property further enhances read stability when the print layer containing the aluminum pigment is composed of independent halftone dots as in the invention of claim 2.

FIG. 1 is a schematic cross-sectional view showing an embodiment of a decorative paperboard constituting the packaging box according to the present invention. FIG. 2 is a schematic cross-sectional view showing another embodiment of the decorative paperboard constituting the packaging box according to the present invention. FIG. 3 is a conceptual diagram of a package using the packaging box according to the present invention.

The packaging box according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an embodiment of decorative paperboard 1 constituting the packaging box 10 according to the present invention.

The decorative box according to the present invention is a packaging formed by molding a decorative printing board 1 containing a transparent printing base film 6 having smooth front and back surfaces, a printing layer 4 containing an aluminum pigment, an adhesive layer 3, and a paper layer 2 in this order. The box is a packaging box characterized in that the particle size of the aluminum pigment is 20 μm or less and the thickness of one piece of the aluminum pigment is 50 nm or less.

In the example shown in FIG. 1, a pattern layer 5 is included between the transparent printing base film 6 and the printing layer 4 containing an aluminum pigment. In addition to this, layers may be added as needed. As the paper layer 2, a paper layer in which a plurality of layers are bonded may be used.

As the transparent printing base film 6, a stretched polyethylene terephthalate (PET) resin film, a stretched polypropylene (PP) film, an acrylic resin film, a cellulose-based resin film, a vinyl chloride resin film, or the like can be used.

It is desirable that the transparent printing base film 6 is as smooth as possible on both the front and back surfaces and has gloss so that the metallic luster of the printing layer 4 containing the aluminum pigment can be sufficiently exhibited.

As the aluminum pigment, a conventional general roofing type aluminum pigment may be used, but in recent years, a special aluminum pigment having a strong metallic luster, which is completely different from the conventional manufacturing method, is also known. As a specific example, aluminum is vapor-deposited on a smooth substrate, and the vapor-deposited film is peeled off to form a pigment, which is commercially available.

Since the thickness of each pigment piece of such an aluminum pigment is as thin as several tens of nm, when printed on a smooth film substrate, it is easy to arrange them on the same surface in an orderly manner to form a mirror surface. Therefore, although it is a printing method, a strong metallic luster comparable to that of aluminum foil can be obtained.

The particle size of the aluminum pigment is preferably 20 μm or less because stable printing cannot be performed if the particle size is too large. The thickness of the pigment piece is preferably 50 nm or less from the viewpoint of the strength of metallic luster.

In the case of aluminum pigments, if individual particles are coated with a highly transparent resin such as acrylic resin, not only the dispersibility during processing into ink is improved, but also the individual particles are formed at the stage of forming a printing layer. Since it becomes difficult to connect electrically, the electric length becomes short, and the radio waves used for the RFID tag can easily pass through.

The thickness of the print layer 4 containing the aluminum pigment is preferably about 1 to 2 μm. For gravure printing, the plate depth is preferably about 25 μm to 30 μm.

The printing layer 4 containing the aluminum pigment should avoid solid printing on a large area, for example, the entire surface. This is because the pigment cost is higher than that of ordinary pigments, and it should be provided only in the necessary parts.

Further, the print layer 4 containing the aluminum pigment may not be formed solidly, but may be formed by halftone dots as schematically shown in FIG. In this way, not only expensive ink can be saved, but also there is an advantage that the radio wave used for the RFID tag is more transparent.

FIG. 3 is a conceptual diagram of a package 20 using the packaging box 10 according to the present invention. When the reference radio wave 13 is irradiated from the outside of the packaging box toward the RFID tag 12 attached to the storage object 11 housed in the packaging box 10, a weak reflected wave 14 is called back. By decoding this with a reader, the authenticity of the stored items can be determined without opening the packaging box.

Conventionally, in a paper box to which aluminum foil has been used as a decorative box, an RFID tag cannot be used because weak radio waves are absorbed by the aluminum foil. However, in the packaging box 10 according to the present invention, the RFID tag cannot be used. , This problem has been resolved.

1 ... Decorative paperboard 2 ... Paper layer 3 ... Adhesive layer 4 ... Printing layer containing aluminum pigment 5 ... Pattern layer 6 ... Transparent printing base film 7 ... Aluminum pigment Print layer including (halftone dot)
10 ... Packaging box 11 ... Stored items 12 ... RFID tag 13 ... Reference wave 14 ... Reflected wave 20 ... Package

Claims (2)

A packaging box formed by molding a transparent printing base film having smooth front and back surfaces, a printing layer containing an aluminum pigment, an adhesive layer, and a decorative paperboard containing a paper layer in this order, and the particle size of the aluminum pigment is It is 20 μm or less, and the thickness of a piece of aluminum pigment is 50 nm or less.
A packaging box characterized in that the printing layer containing the aluminum pigment is composed of independent halftone dots. An RFID tag is attached to the article stored in the packaging box according to claim 1 , and the tag information can be read from the outside of the box without opening the box. ..

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