JP2022117017A - Packaging sheet, packaging container, package, and packaging bag - Google Patents

Abstract

To provide a packaging sheet for use in packaging an article, wherein the packaging sheet can detect a metal mixed in the storage space for a packed article or the article itself, with a metal detector.SOLUTION: The present invention discloses a packaging sheet for use in packaging an article, wherein the packaging sheet is composed of at least a paper material layer, a first adhesive layer, a transparent vapor-deposited resin layer, a second adhesive layer, and a thermoplastic resin layer which are laminated in this order from one side to the other side of the packaging sheet. The transparent vapor-deposited resin layer has a resin layer and a non-metal vapor-deposited layer, which is vapor-deposited on the resin layer. The packaging sheet does not have a layer primarily composed of metal.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a packaging sheet used for packaging articles. The present invention also relates to packaging containers, packages, and packaging bags using the packaging sheet.

Various forms are known as packaging forms for articles such as foods. For example, a packaging container is known that includes a container body that forms a storage space for storing articles, and a packaging sheet that is attached to the container body so as to close the storage space. A package formed by wrapping an article with a package sheet is also known. Furthermore, packaging bags formed using packaging sheets are also known.

As described above, the packaging sheets used in various packaging forms are sometimes required to have a light-shielding property. Therefore, as shown in Patent Literature 1, a packaging sheet has been proposed in which a light-shielding property is obtained by providing an aluminum deposition layer.

JP-A-2001-121649

However, as described above, in a packaging form using a packaging sheet provided with an aluminum deposition layer, metal detectors cannot detect metal mixed in the space in which the article is accommodated or in the article itself.

Therefore, the present invention provides a packaging sheet used for packaging an article, which is capable of detecting metal mixed in the accommodation space of the article or in the article itself with a metal detector while the article is wrapped. An object of the present invention is to provide a packaging container, a packaging body, and a packaging bag formed using the packaging sheet.

The packaging sheet according to the present invention is a packaging sheet used for packaging an article, comprising at least a paper material layer, a first adhesive layer, and a transparent vapor-deposited resin in order from one surface side to the other surface side of the packaging sheet. layer, a second adhesive layer, and a thermoplastic resin layer are laminated, and the transparent vapor-deposited resin layer includes a resin layer and a non-metal vapor-deposited layer vapor-deposited on the resin layer, and the metal is not provided as a main component.

According to such a configuration, the transparent vapor-deposited resin layer includes the resin layer and the non-metal vapor-deposited layer vapor-deposited on the resin layer, and the packaging sheet does not include a metal-based layer. As a result, the metal detector can detect the metal mixed in the storage space of the article and the article itself in a state where the article is packaged using the packaging sheet. Further, by providing the paper material layer, a light shielding property can be obtained.

A transparent cellophane layer forming one side of the packaging sheet and in contact with the paper material layer may be provided.

According to such a configuration, the transparent cellophane layer forming one surface of the packaging sheet is in contact with the paper material layer, so that the paper material layer can be visually recognized from the one surface side of the packaging sheet, and the transparent cellophane layer can be seen from the one surface side of the packaging sheet. can protect the paper material layer. This makes it possible to improve and maintain the design of the packaging sheet.

A light shielding layer using ink may be provided between the paper material layer and the first adhesive layer.

According to such a configuration, by providing the light shielding layer using ink between the paper material layer and the first adhesive layer, it is possible to obtain a packaging sheet having better light shielding properties.

A packaging container according to the present invention is a packaging container using the packaging sheet described above, and includes a container body that forms an accommodation space for accommodating an article, and is packaged so that one surface of the packaging sheet faces the outside. A storage space is formed by being closed by the sheet.

A package according to the present invention is formed by wrapping an article with the above packaging sheet.

A packaging bag according to the present invention is formed from the packaging sheet described above.

As described above, according to the present invention, there is provided a packaging sheet used for packaging an article, which can detect, with a metal detector, metals mixed in the storage space of the article or in the article itself while the article is wrapped. can be provided. Moreover, a packaging container, a package, and a packaging bag formed using the packaging sheet can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the packaging sheet which concerns on 1st embodiment of this invention. Sectional drawing of the packaging sheet which concerns on 2nd embodiment of this invention. Sectional drawing of the packaging sheet which concerns on 3rd embodiment of this invention. Sectional drawing of the packaging sheet which concerns on 4th embodiment of this invention. Sectional drawing which showed the packaging container formed using the packaging sheet which concerns on each embodiment. The perspective view which showed the package formed using the packaging sheet which concerns on each embodiment. The perspective view which showed the packaging bag formed using the packaging sheet which concerns on each embodiment.

EMBODIMENT OF THE INVENTION Below, embodiment of the packaging sheet which concerns on this invention is described based on drawing. In the drawings below, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

<First embodiment>
As shown in FIG. 1, the packaging sheet 10 according to the present embodiment includes at least a paper material layer 1, a first adhesive layer 2, a transparent evaporated resin layer 3, a second An adhesive layer 4 and a thermoplastic resin layer 5 are laminated and formed. Moreover, the packaging sheet 10 does not include a layer containing metal as a main component. Specifically, the packaging sheet 10 has one surface formed by the paper material layer 1 and the other surface formed by the thermoplastic resin layer 5 . The paper material layer 1 and the transparent vapor-deposited resin layer 3 are in contact with the first adhesive layer 2 , and the transparent vapor-deposited resin layer 3 and the thermoplastic resin layer 5 are in contact with the second adhesive layer 4 .

One surface of the paper material layer 1 forms one surface of the packaging sheet 10 and the other surface is in contact with the first adhesive layer 2 . The thickness of the paper material layer 1 is not particularly limited. The basis weight of the paper sheet constituting the paper material layer 1 is preferably 5 g/m ² or more and 200 g/m ² or less, more preferably 10 g/m ² or more and 180 g/m ² or less. The paper sheet is not particularly limited, and for example, fine paper, rayon paper, paper coated or impregnated with a barrier coating agent, white paperboard, ivory paper, milk carton base paper, cup base paper, etc. can be used. By providing the paper material layer 1, the light shielding property can be improved more than when the paper material layer 1 is replaced with a transparent resin layer.

On one side of the paper material layer 1 (the side forming one side of the packaging sheet 10), an ink layer (not shown) may be formed by printing characters, patterns, and the like. By forming an ink layer on one surface of the paper material layer 1 (the surface forming one surface of the packaging sheet 10), when the packaging sheet 10 is viewed from one surface, the texture of the paper (texture of the material) ) can be obtained, and characters, patterns, etc. formed by the ink layer can be visually recognized.

The first adhesive layer 2 bonds the paper material layer 1 and the transparent deposited resin layer 3 . Also, the second adhesive layer 4 bonds the transparent deposited resin layer 3 and the thermoplastic resin layer 5 . The thickness of the first adhesive layer 2 and the second adhesive layer 4 is not particularly limited, and is preferably 0.1 μm or more, preferably 50 μm or less, more preferably 40 μm or less, and still more preferably 30 μm or less. Also, the first adhesive layer 2 and the second adhesive layer 4 may be adhesive layers or adhesive resin layers.

The adhesive layer can be formed by a conventionally known method. For example, the adhesive layer can be formed by dry lamination. In the dry lamination method, the adhesive is applied to the sheet material forming one of the two layers to be adhered and dried. Then, one sheet material and the other sheet material are laminated with a dried adhesive layer interposed therebetween, and the two layers are bonded by the adhesive layer by heat-pressing. The adhesive to be applied is not particularly limited, and examples thereof include one-component or two-component curable or non-curable vinyl-based, (meth)acrylic-based, polyamide-based, polyester-based, polyether-based, and polyurethane-based adhesives. , epoxy-based, rubber-based, and other solvent-based, water-based, or emulsion-based adhesives can be used. A cured product of a polyol and an isocyanate compound can be used as the two-liquid curing adhesive. The method of applying the adhesive is not particularly limited, and for example, a direct gravure roll coating method, a gravure roll coating method, a kiss coating method, a reverse roll coating method, a fonten method, a transfer roll coating method, or the like can be used.

The adhesive resin layer can be formed by a conventionally known method such as a melt extrusion lamination method or a sand lamination method. The adhesive resin layer contains a thermoplastic resin. As the thermoplastic resin, for example, a polyethylene-based resin, a polypropylene-based resin, a cyclic polyolefin-based resin, or a copolymer resin, a modified resin, or a mixture (including an alloy) containing these resins as a main component can be used. can be done. Examples of polyethylene-based resins include low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and the like. As the cyclic polyolefin resin, for example, cyclic polyolefins such as ethylene-propylene copolymer, polymethylpentene, polybutene, and polynorbonene can be used. These resins can be used singly or in combination. Moreover, the adhesive resin layer can be formed of a film formed using the resin described above. As such a film, a non-stretched film, a uniaxially stretched film, a biaxially stretched film, or the like can be used.

The thickness of the transparent vapor-deposited resin layer 3 is not particularly limited, and is preferably 5 μm or more and 50 μm or less, more preferably 8 μm or more and 40 μm or less. The transparent vapor-deposited resin layer 3 includes a resin layer 3a and a non-metal vapor-deposited layer 3b vapor-deposited on the resin layer 3a. The resin constituting the resin layer 3a is not particularly limited, and examples thereof include polyethylene terephthalate-based resins, nylon-based resins, polyvinyl chloride-based resins, and the like. Also, the resin layer 3a may be a film formed using these resins. As such a film, a non-stretched film, a uniaxially stretched film, a biaxially stretched film, or the like can be used. Silicon dioxide etc. are mentioned as a component which comprises the non-metal deposition layer 3b. That is, as the transparent vapor-deposited resin layer 3, a transparent vapor-deposited film obtained by vapor-depositing a non-metallic component on the above resin film can be used.

The transparent deposition film preferably has an oxygen permeability of 0.1 cc/m ² ·atm·day or more and 20 cc/m ² ·atm·day or less. Further, the transparent deposited film preferably has a water vapor transmission rate of 0.1 g/m ² ·day or more and 20 g/m ² ·day or less.
The oxygen permeability is measured according to JIS K 7126-2. Also, water vapor permeability can be measured based on JIS K 7129-2.

One surface of the thermoplastic resin layer 5 is in contact with the second adhesive layer 4 and the other surface forms the other surface of the packaging sheet 10 . The thickness of the thermoplastic resin layer 5 is not particularly limited, and is preferably 5 μm or more and 100 μm or less, more preferably 10 μm or more and 90 μm or less, still more preferably 15 μm or more and 80 μm or less. The thermoplastic resin layer 5 constitutes a sealant layer that enables the packaging sheet 10 to be heat-sealed when forming a packaging form described later. The resin constituting the thermoplastic resin layer 5 is not particularly limited, and examples thereof include polyethylene-based resins, polypropylene-based resins, polyvinyl chloride-based resins, and the like. Also, the thermoplastic resin layer 5 may be a film formed using these resins. As such a film, a non-stretched film, a uniaxially stretched film, a biaxially stretched film, or the like can be used.

<Second embodiment>
A packaging sheet 10 according to this embodiment differs from that of the first embodiment in that a transparent cellophane layer 6 is provided as shown in FIG. Therefore, the points different from the first embodiment will be described below.

The transparent cellophane layer 6 forms one surface of the packaging sheet and is in contact with the paper material layer 1 . Specifically, one surface of the transparent cellophane layer 6 forms one surface of the packaging sheet, and the other surface of the transparent cellophane layer 6 is in contact with the paper material layer 1 .

Cellophane constituting the transparent cellophane layer 6 is mainly made of pulp (sulfite pulp) made by chemically treating wood. It is a coagulated regenerated cellulose film. Cellophane constituting the transparent cellophane layer 6 includes ordinary cellophane and moisture-proof cellophane. Ordinary cellophane includes, for example, 70 to 90% regenerated cellulose, 2 to 20% polyhydric alcohol (softening agent), and 6 to 15% moisture. Moisture-proof cellophane includes ordinary cellophane coated with moisture-proof coating.

The thickness of the transparent cellophane layer 6 is not particularly limited, and is preferably 5 μm or more and 50 μm or less, for example.

An ink layer (not shown) may be formed on the other surface of the transparent cellophane layer 6 (the surface on the side of the paper material layer 1) by printing characters, patterns, and the like. By forming an ink layer on the other surface of the transparent cellophane layer 6 (the surface on the side of the paper material layer 1), when the packaging sheet 10 is viewed from one surface side, the ink can be seen through the transparent cellophane layer 6. The layers and the paper material layer 1 are visible. For this reason, while leaving the texture (feeling of material) of paper, characters, patterns, etc. formed by the ink layer can be visually recognized, and the ink layer can be protected.

<Third Embodiment, Fourth Embodiment>
The packaging sheet 10 according to the third embodiment differs from the first embodiment in that it includes a light shielding layer 7 as shown in FIG. Moreover, the packaging sheet 10 according to the third embodiment differs from the second embodiment in that it includes a light shielding layer 7 as shown in FIG. Therefore, the points different from the first embodiment and the second embodiment will be described below.

In the third and fourth embodiments, the light shielding layer 7 is formed between the paper material layer 1 and the first adhesive layer 2 . Specifically, the light shielding layer 7 is formed by applying ink to the other surface of the paper material layer 1 . The color of the ink forming the light shielding layer 7 is not particularly limited, and examples thereof include white and black. The thickness of the light shielding layer 7 is not particularly limited, and is preferably 0.1 μm or more and 10 μm or less, more preferably 0.2 μm or more and 8 μm or less, and still more preferably 0.3 μm or more and 8 μm or less.

The form of packaging an article such as food using the packaging sheet 10 configured as in each of the above embodiments is not particularly limited. For example, as shown in FIG. are mentioned. The packaging container 100 includes a container body 100a that forms an accommodation space R in which an article X is accommodated. The packaging container 100 is formed by attaching the packaging sheet 10 to the container body 100a so as to close the opening 100b of the container body 100a with the article X stored in the storage space R. In the packaging container 100, one side of the packaging sheet 10 (specifically, the paper material layer 1 in the first and third embodiments, and the transparent cellophane layer 6 in the second and fourth embodiments) is It is attached to the container main body 100a so as to be on the outside.

Another form of packaging an article using the packaging sheet 10 includes, for example, a package 200 formed by wrapping an article X with the packaging sheet 10 as shown in FIG. One side of the package 200 (specifically, the paper material layer 1 in the first and third embodiments, and the transparent cellophane layer 6 in the second and fourth embodiments) faces outward. Next, the packaging sheet 10 is wrapped around the article X along the shape of the article X. As shown in FIG.

As another form of packaging an article using the packaging sheet 10, for example, as shown in FIG. A packaging bag 300 formed in a bag shape with the paper material layer 1 and the transparent cellophane layer 6) facing outward in the second and fourth embodiments may be used. Further, as still another form of packaging an article using the packaging sheet 10, for example, one surface of the packaging sheet 10 (specifically, in the first embodiment and the third embodiment, the paper material layer 1, the second In the second embodiment and the fourth embodiment, a bag (not shown) formed by pillow packaging so that the transparent cellophane layer 6) is on the outside may be used.

As described above, the packaging sheet 10, the packaging container 100, the packaging body 200, and the packaging bag 300 according to the present embodiment are mixed in the accommodation space of the article X or the article X itself in a state in which the article X is packaged. Metal can be detected with a metal detector.

That is, the transparent vapor-deposited resin layer 3 includes a resin layer and a non-metal vapor-deposited layer vapor-deposited on the resin layer, while the packaging sheet 10 does not include a layer containing metal as a main component. Thus, in a state in which the article X is packaged using the packaging sheet 10, the metal detector can detect the metal mixed in the accommodation space of the article X or the article X itself. Further, by providing the paper material layer 1, a light shielding property can be obtained.

In addition, since the transparent cellophane layer 6 forming one surface of the packaging sheet 10 is in contact with the paper material layer 1, the paper material layer 1 can be visually recognized from one surface side of the packaging sheet 10, and the transparent cellophane layer 6 can protect the paper material layer 1 . Thereby, the improvement and maintenance of the design property of the packaging sheet 10 can be aimed at.

Further, by providing the light shielding layer 7 using ink between the paper material layer 1 and the first adhesive layer 2, it is possible to obtain the packaging sheet 10 having better light shielding properties.

The packaging sheet, packaging container, and package according to the present invention are not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention. In addition, the configurations, methods, etc. of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations, methods, etc., according to one embodiment are applied to the configurations, methods, etc., according to other embodiments). well), and furthermore, it is of course possible to arbitrarily select configurations, methods, and the like according to various modifications described below and employ them in the configurations, methods, and the like according to the above-described embodiments.

For example, in the above embodiment, the light shielding layer 7 is formed between the paper material layer 1 and the first adhesive layer 2, but is not limited to this. For example, the paper material layer 1 functions as the light shielding layer 7. It may be configured to Specifically, the paper material layer 1 may function as the light shielding layer 7 by impregnating the paper material layer 1 with ink such as white or black.

Further, in each of the above embodiments, another layer may be arranged between each layer.

DESCRIPTION OF SYMBOLS 1... Paper material layer 1... Paper material layer 2... First adhesive layer 3... Transparent vapor-deposited resin layer 3a... Resin layer 3b... Non-metal vapor-deposited layer 4... Second adhesive layer 5... Thermoplastic resin Layer 6...Transparent cellophane layer 7...Light shielding layer 10...Packaging sheet 100...Packaging container 100a...Container body 100b...Opening part 200...Packing body 300...Packaging bag R...Accommodating space X... goods

Claims (6)

A packaging sheet used for packaging an article,
At least a paper material layer, a first adhesive layer, a transparent deposited resin layer, a second adhesive layer, and a thermoplastic resin layer are laminated in this order from one side of the packaging sheet to the other side. cage,
The transparent vapor-deposited resin layer includes a resin layer and a non-metal vapor-deposited layer vapor-deposited on the resin layer,
without a metal-based layer,
packaging sheet. A transparent cellophane layer forming one surface of the packaging sheet and in contact with the paper material layer,
The packaging sheet according to claim 1. A light-shielding layer using ink is provided between the paper material layer and the first adhesive layer,
The packaging sheet according to claim 1 or 2. A packaging container using the packaging sheet according to any one of claims 1 to 3,
It has a container body that forms a storage space for storing the article,
The housing space is closed by the packaging sheet so that one surface of the packaging sheet faces the outside,
packaging container. A package formed by wrapping an article with the package sheet according to any one of claims 1 to 3. A packaging bag formed from the packaging sheet according to any one of claims 1 to 3.

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