JPH0672464A - Package - Google Patents

Abstract

PURPOSE:To ensure that a package has never been opened, if it has been opened by anyone, it can be known. CONSTITUTION:A light diffracting form 5 such as a relief of hologram is made on a surface of a content side of a seal layer 4 which is formed on a base layer 3. Then the seal layers 4 are jointed with each other on the light diffracting form 5, and heat sealed to seal a seal part 6 and to disappear the light diffracting form 5. Thus, if the seal part 6 is unsealed, is can easily be known.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging body suitable for packaging currency, precious metals, electronic parts, etc., and more particularly, a packaging body which enables an unopened guarantee that the fact can be known when opened by an outsider. It is about.

[0002]

2. Description of the Related Art Conventionally, as a packaging body of this type, "a laminating layer is laminated on both sides of a thin metal sheet,
A laminate is known in which a pattern is formed by applying pressure or heat from the surface side of the laminate layer (Shokai 64-50927).

[0003]

However, the conventional package described above is low in safety because it can be opened by an outsider, the contents can be replaced with a poor quality one, and the contents can be resealed. There was a problem. It is an object of the present invention to solve the above-mentioned problems, and to provide a package body which can be assured of being unopened and whose fact is known when opened.

[0004]

In order to solve the above-mentioned problems, a package (1) according to the present invention comprises at least a base material layer (3) and a sealing layer (4) formed inside the base material layer.
A packaging body in which a packaging material (2) consisting of and is sealed with a sealing portion (6), wherein a light diffraction structure (5) is formed on the entire surface of the sealing layer other than the sealing portion on the contents side. .

In this case, the packaging material has the light diffractive structure on the entire inner surface before sealing, and by sealing, the sealing portion is sealed and the light diffractive structure is erased. Can be characterized. Further, the seal portion may have a print layer between the base material layer and the seal layer. Further, it may be characterized by having a release layer between the base material layer and the seal layer. Furthermore, the light diffraction structure may be a relief of a diffraction grating or a hologram.

[0006]

According to the present invention, an optical diffraction structure such as a relief of a hologram is formed on the surface of the sealing layer of the packaging material on the content side, and the optical diffraction structure sides of the sealing layer are overlapped and heat sealed. This seals the seal portion and erases the light diffraction structure, so that the fact can be easily discriminated when the seal is opened.

[0007]

The present invention will be described in detail below with reference to the drawings and the like. FIG. 1 is a diagram showing an embodiment of a package according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.
The package 1 of this embodiment is obtained by sealing a packaging material 2 including a base material layer 3 and a seal layer 4 formed inside the base material layer 3 with a seal portion 6. The base material layer 3 is PE
A material having higher heat resistance than the sealing layer 4, such as T, OPP, and Ny, is used. The seal layer 4 is a layer that is fused by heating, and PE, PP or their copolymers, blends and the like can be used.

In this embodiment, the seal portion 6 of the seal layer 4 is
The light diffractive structure 5 is formed on the entire surface other than the contents side. As the light diffraction structure 5, for example, a diffraction grating or a relief of a hologram can be used. This light diffraction structure 5 is produced by recording and developing interference fringes on a photosensitive material by using laser light to prepare a master, making a printing plate from the master, and subjecting the plate to heat pressing or EC hologram (melt extrusion method). , Formed on the surface of the seal layer 4. Light diffraction structure 5
If it does not exist, a completely different product will be forged by creating a new package.

The packaging material 2 has a light diffraction structure 5 on the entire inner surface of the sealing layer 4 before sealing. The inner surfaces (seal layer 4 side) of the packaging material 2 are overlapped with each other, the contents are put therein, and heat and pressure are applied to form the seal portion 6 in the periphery. Due to this heat, the seal layer 4 is melted and the optical diffraction structure 5 formed on the surface disappears, and at the same time, the seal layers 4 are fused and the sealing is completed. Eliminating the light diffraction structure 5 by thermocompression bonding is an effective method for attaching the light diffraction structure 5 to the entire surface other than the seal portion 6.

Since the package 1 of this embodiment is constructed as described above, when the package 1 is unsealed from the seal portion 6, the seal portion 6 is destroyed and cannot be resealed, and the package 1 is unsealed. You will understand the fact that you did. Further, when the seal portion 6 is cut off and re-sealed with scissors, the package 1
The size of the package becomes one size smaller and the fact of opening can be easily identified. Therefore, if the package 1 is not subjected to these deformations and maintains the normal shape, it is a proof of being unopened. It should be noted that when the seal portion 6 is cut out and made smaller, it is possible to open the seal portion 6 by making it one size smaller when there is no light diffractive structure 5 as in the conventional case. Another package will be made.

Further, in order to make the unopened guarantee more complete, as shown in FIG. 2, the seal portion 6 is printed with a pattern such as characters and figures between the base material layer 3 and the seal layer 4. The printed layer 7 may be formed. When the seal portion 6 is cut off by the scissors, the printing layer 7 falls off, so that the fact of opening can be easily discriminated visually.

Further, by forming the peeling layer 8 between the base material layer 3 and the seal layer 4, the seal layer 4 having the light diffraction structure 5 and the base material layer 3 are easily peeled off when opened. . Although the peeling layer 8 may be formed on the entire surface,
As shown in, if it is partially formed, when opened,
The seal layer 4 is destroyed.

[Production Example] The substrate layer 3 has a thickness of 20 μm.
Using OPP film from
As described above, linear printing was performed at the position to be the seal portion 6 to form the printing layer 7. Then, a hologram printing plate produced by a known method is attached to a cooling cylinder,
When a CPP resin was extrusion-coated to form a sealing layer 4 having a thickness of 30 μm, a packaging material 2 having a hologram relief surface as a light diffraction structure 5 on the surface of the sealing layer 4 was obtained. As shown in FIG. 1, using this packaging material 2, hologram relief surfaces were overlapped, and a hot plate heated to 150 ° C. was pressure-bonded for 2 seconds at a pressure of 2 kg / cm ² to seal the peripheral portion. However, the hologram relief surface at that portion disappeared, and the seal portion 6 was fused to form a bag. This package 1 could not be opened due to the fact that it was opened.

As described above, the packaging body 1 of this embodiment cannot be resealed in the same way once it is opened and then destroyed somewhere, and the packaging material having the light diffraction structure 5 is obtained. Since 2 is difficult to obtain, if it is sealed with another packaging material, it can be easily understood that it has been rewrapped because there is no light diffractive structure 5, and it is guaranteed that it is unopened.

[0015]

As described above, according to the present invention,
Since the light diffraction structure is formed on the content side surface of the seal layer of the packaging material, the light diffraction structure sides of the seal layer are overlapped with each other,
The heat sealing not only seals the sealing portion but also erases the light diffraction structure. Therefore, when the package is opened, the fact that the package is opened can be easily identified.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a package according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Packaging 2 Packaging Material 3 Base Layer 4 Sealing Layer 5 Optical Diffraction Structure 6 Sealing Part 7 Printing Layer 8 Release Layer

Claims (5)

[Claims] 1. A package for sealing a packaging material, which comprises at least a base material layer and a seal layer formed inside the base material layer, at a seal portion, wherein the content of the seal layer other than the seal portion is on the content side. A package having a light diffraction structure formed on the entire surface. 2. The packaging material has the light diffractive structure on the entire inner surface before sealing, and by sealing, the sealing portion is sealed and the light diffractive structure is erased. The package according to claim 1. 3. The seal portion has a print layer between the base material layer and the seal layer.
Alternatively, the package according to claim 2. 4. The package according to claim 1, further comprising a release layer between the base material layer and the seal layer. 5. The package according to claim 1, wherein the light diffraction structure is a relief of a diffraction grating or a hologram.