JPH0839720A - Packaging material and package using the packaging material - Google Patents

Abstract

PURPOSE:To prevent poor adhesion of a printing ink layer and development of off-odor by a method wherein the printing ink layer is formed on a top surface of a metallized layer of a metallized film using printing ink containing no toluene as a solvent, a protective layer doubling a release layer is formed thereon, and a cold shielding agent layer is provided on the lower surface of a substrate film layer of the metallized film. CONSTITUTION:On a top surface of a metallized layer 112 of a metallized film 110 formed by providing the metallized layer 112 on a surface of a substrate film 111, a printing ink layer 120 is formed using printing ink not containing toluene as a solvent, such as polyamide ink. A protective layer 130 doubling a release layer is formed on the top surface of the printing ink layer 120. In addition, a cold shielding agent layer 140 of a cold shielding agent, such as an isoprene or other synthetic rubber, a natural rubber, or an emulsion of a modified natural rubber, is provided on the lower surface of the substrate film layer 111 of the metallized film 110.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material having metallic luster for individually packaging confectionery such as chocolate and popsicle, and a package using the packaging material.

[0002]

2. Description of the Related Art Conventionally, confectionery such as chocolate, cookies, candy and ice cream is individually packaged in a tubular bag and the top is bound with a binding tool such as wire and sealed, or the inner layer is heated. A packaging material composed of a heat-adhesive resin layer that is fused or a cold sealant layer that is pressure-bonded at room temperature is used for packaging by a pillow packaging method or the like.

[0003]

By the way, in order to enhance the commercial value and the protection of the contents of the above-mentioned confectionery package,
A packaging material using a metal vapor deposition film formed by forming a metal vapor deposition layer on the surface of a base film is generally used. In this case, the vapor deposition surface side of the metal vapor deposition film is placed inside, the printing layer is provided on the film side, and the cold sealing agent layer is directly provided on the vapor deposition surface. However, since the adhesion strength of the cold sealant layer decreases with time, improvement has been required. If a different plastic film is provided on the vapor-deposited surface, the problem can be solved, but the cost will increase.Therefore, an improved packaging material with a configuration in which the printing layer and the cold sealant layer are provided directly on the vapor-deposited film is required. It was being done. Here, toluene in the mixed solvent of the printing ink applied to the upper surface of the metal vapor deposition layer is adsorbed and remains on the metal vapor deposition layer even after drying, causing poor adhesion of the printing ink layer,
There was a problem such as generation of a strange odor.

The present invention has a structure in which a printed layer is directly provided on a vapor-deposited film, and the amount of toluene remaining in the metal vapor-deposited layer is reduced as much as possible, and the adhesion strength of the cold sealant layer is not lowered. SUMMARY OF THE INVENTION The present invention provides a packaging material and a packaging body thereof which can solve the above problems and can be easily pressure-bonded.

[0005]

The first invention, as shown in FIG. 1, is a metal vapor deposition film (110) formed by forming a metal vapor deposition layer (112) on the surface of a substrate film (111).
A printing ink layer (120) is formed on the upper surface of the metal vapor-deposited layer (112) with a printing ink that does not contain toluene as a solvent, and a protective and peeling layer (130) is formed on the upper surface of the printing ink layer (120). Moreover, the metal vapor deposition film (11
The packaging material (100) is characterized in that the cold sealing agent layer (140) is formed on the lower surface of the base film (111) layer of (0).

As shown in FIG. 2, the second invention uses the packaging material (100) described in the first invention, with the cold sealant layer (140) of the packaging material (100) inside. The packaging body (10) is characterized in that the contents (20) are stored, and the joint portions (11) between the surfaces of the cold sealant layers are pressure-bonded.

Polyamide ink, nitrified cotton / shellac ink, nitrified cotton / polyamide ink, etc. can be used as the printing ink containing no toluene as the solvent.

The metal vapor-deposited film is made of polyester such as polyethylene terephthalate or polybutylene terephthalate, polyolefin such as polyethylene or polypropylene, polyamide such as nylon 6 or nylon 12, base film such as polyvinyl alcohol, aluminum, silicon or chromium. It is a vapor deposited metal such as nickel and nickel. The formation of the printing ink layer on the upper surface of the metal vapor deposition layer must be performed in a state where the metal vapor deposition layer is not oxidized and contaminated in order to improve the adhesion between the printing ink layer and the metal vapor deposition layer.

As the cold seal agent, synthetic rubber such as isoprene, natural rubber or emulsion of a modified natural rubber can be used.

[0010]

In the packaging material and the packaging body of the present invention,
The printing ink layer formed on the upper surface of the metal vapor deposition layer of the metal vapor deposition film is formed by the printing ink that does not contain toluene in the solvent, so in the portion where the printing ink layer is formed,
Toluene is not adsorbed and remains on the metal vapor deposition layer.

Since the cold sealant layer is formed on the inner surface of the package of the present invention, if the joint portion of the inner surface is pressed, the package can be easily bonded even at a low temperature.

[0012]

【Example】

Example 1 First, as shown in FIG. 1, a biaxially stretched polypropylene film was used as a substrate film (111), and aluminum was vapor-deposited on one surface of the substrate film (111) to deposit a metal vapor deposition layer (112).
On the upper surface of the aluminum vapor deposition layer of the metal vapor deposition film (110), the metal vapor deposition film (110) (MLOP102 manufactured by Tokyo Cellophane Paper Co., Ltd.) on which
A printing ink layer (120) is formed by a gravure printing method using a snack viewer printing ink (vehicle; polyamide) manufactured by Dainippon Ink and Chemicals, Inc., which is a printing ink containing no toluene as a solvent, and then this To form a protective layer / release layer (130) on the upper surface of the printing ink layer (120), which has both protection of the printing ink layer (120) and releasability for the cold seal agent layer formed on the back surface of the metal deposition film. Then, BCX-M varnish (polyamide) manufactured by Dainippon Ink and Chemicals, Inc. is applied by gravure printing and dried to form a protective layer / release layer (130).
Was formed. Further, CS502 manufactured by Dainippon Ink and Chemicals, Inc. is provided on the back surface of the metal vapor deposition film (110).
A cold sealant was used to form a cold sealant layer (140) by a gravure printing method to prepare a packaging material (100) of this example.

A sensory test was conducted by 10 panelists on the toluene odor of the packaging material in order to examine the residual toluene of the packaging material (100) of the present embodiment, but no toluene odor was confirmed.

<Example 2> First, using the packaging material (100) produced in Example 1, as shown in FIG.
0) to cover the cold sealant layers (1)
1) was pressure-bonded to produce a package (10) of this example. The seal portion could be easily bonded at room temperature by applying pressure.

With respect to the package of the present example containing the above-mentioned chocolate, changes in the odor and taste of chocolate and changes in the seal strength of the cold seal portion were examined at room temperature. Table 1 shows the results. The smell and taste were the results of sensory tests by 10 panelists, and the evaluation was “no change: ○, slightly change: Δ,
There was a change: × ”. Regarding the seal strength, 90 degree peel strength at a width of 15 mm and a tensile speed of 300 mm / min was measured by a Tensilon tensile tester manufactured by Orientec.

[0016]

[Table 1]

As shown in Table 1, the evaluation results of changes in the odor and taste of the contents were all evaluated as unchanged. Further, no decrease in the seal strength of the cold seal part was observed.

[0018]

EFFECT OF THE INVENTION The packaging material of the present invention and the package using the packaging material have the following features:
Since the printing ink layer is formed with a printing ink that does not contain toluene as a solvent, toluene does not remain on the metal vapor deposition layer because it is not adsorbed and remains in the area where the printing ink layer is formed. There are very few problems such as generation of nasty smell and odor.

Further, in the present invention, when the cold sealant layer is provided inside the package when the package is produced from the packaging material, the inner surfaces of the cold sealant layers are simply pressed together to easily apply pressure even at a low temperature. Since it can be sealed, it can be applied to a package of contents that dislike heat.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a packaging material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a package according to an example of the present invention, which is produced using the packaging material of Example 1.

[Explanation of symbols]

 10 ... Package 11 ... Collecting layer between cold sealant layers 20 ... Contents, chocolate 100 ... Packaging material 110 ... Metal deposition film 111 ... Base film 112 ... Metal deposition layer 120 ... Printing Ink layer 130 …… Protective layer and peeling layer 140 …… Cold seal layer

Claims (2)

[Claims] 1. A printing ink layer is formed by a printing ink containing no toluene as a solvent on the upper surface of a metal vapor deposition film formed by forming a metal vapor deposition layer on the surface of a substrate film, and the upper surface of the printing ink layer is formed. Form a protective layer and peeling layer on
In addition, a packaging material characterized in that a cold sealing agent layer is formed on the lower surface of the base film layer of the metal vapor deposition film. 2. The packaging material according to claim 1, wherein the contents are stored with the cold sealing agent layer of the packaging material as the inner side, and the joint portion between the surfaces of the cold sealing agent layers is pressure-bonded. Characteristic packaging.