JPH11316548A - Aluminum vapor-deposited label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum vapor-deposited label which has adhesion large enough not to easily peel in use and is easily removed when the beer bottle, etc., is reused. SOLUTION: The aluminum vapor-deposited label 1 is formed of aluminum vapor-deposited paper 3 and an sticking agent layer 5 provided on the reverse surface. The aluminum vapor-deposited paper 3 is constituted by stacking coat paper 7, a filler layer 9, an aluminum vapor-deposited layer 11, and a top coat layer 13 in order. The sticking agent layer 5, filler layer 9, and top coat layer 13 are soluble in alkali. On the top coat layer 13, a print layer and an overcoat layer may be provided and in this case, the overcoat layer is alkali-soluble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label attached to the surface of a glass bottle, a plastic container or the like, and more particularly to an aluminum-deposited label provided with a metallic luster by including aluminum-deposited paper.

[0002]

2. Description of the Related Art A label is attached to the surface of a glass bottle such as a beer bottle, a plastic container such as a PET bottle, or the like in order to display a trademark, a manufacturer / seller, a manufacturing date, and the like. As the label, a label having a metallic luster is often used in order to enhance the aesthetic appearance. As such a label, a label in which an aluminum foil having a thickness of about 7 to 8 μm and a paper material are laminated via an adhesive layer made of an acrylic resin or the like, and an adhesive layer is provided on the back surface of the paper material, Conventionally used.

[0003] Beer bottles and the like are collected and reused after use. To reuse, it is necessary to remove the label and reapply a new label. The label is removed by washing the beer bottle with water, an alkaline aqueous solution or the like, and dissolving or disintegrating the pressure-sensitive adhesive layer. PET bottles and the like are collected after use, melted, and used as resources. Before melting, like a beer bottle, water, washed with an alkaline aqueous solution, etc., the adhesive layer is dissolved or disintegrated,
The label is removed.

However, in a conventional label using an aluminum foil, it is difficult for water or an alkaline aqueous solution to permeate the aluminum foil, and it is difficult for water or an alkaline aqueous solution to reach the adhesive layer. It takes time.

As a method of obtaining a label which can be removed in a short time, a method of using a starch paste which is easily dissolved in water for an adhesive layer has been conventionally adopted. However, starch glue is applied before labeling, so a coating device is required,
Not yet suitable for mass production, but for labeling small lots. In addition, when starch paste is used, the equipment and its surroundings are stained with starch paste, and time and labor such as cleaning are required. For this reason, labels using starch glue are not very popular these days.

[0006]

Means for facilitating the removal of the label by using an adhesive having a low adhesive strength are also conceivable. However, beer bottles, PET bottles, etc. are often cooled and water droplets adhere to the surface due to condensation, and they are often immersed in ice water and cooled. The label may peel off at the stage of use due to water that has penetrated to the pressure-sensitive adhesive layer.

The present invention has been made in view of these problems, and has an adhesive force that does not easily peel off at the stage of use, and is easy to remove when reusing a beer bottle or the like. Its purpose is to provide a label.

[0008]

Means for Solving the Problems The invention made to achieve the above-mentioned object is to provide an aluminum-evaporated label comprising an aluminum-evaporated paper and an alkali-soluble pressure-sensitive adhesive layer provided on the back surface of the aluminum-evaporated paper. (Claim 1).

According to the present invention, aluminum-deposited paper is used to develop metallic luster, and the pressure-sensitive adhesive layer is made alkali-soluble, so that the pressure-sensitive adhesive layer is not easily peeled off at the stage of use. The label can be easily removed by washing with an alkaline aqueous solution.

When the aluminum-deposited paper is formed by sequentially laminating a paper material, a filler layer, an aluminum-deposited layer and a top coat layer, the filler layer and the top coat layer are made alkali-soluble. In addition, the removal of the label can be further facilitated (claim 2).

When a printing layer and an overcoat layer are successively laminated on the surface of the aluminum-deposited paper, the overcoat layer is made alkali-soluble,
Removal of the label can be further facilitated (claim 3).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of an aluminum vapor-deposited label 1 according to an embodiment of the present invention. The aluminum-deposited label 1 includes an aluminum-deposited paper 3 and a pressure-sensitive adhesive layer 5 provided on the back surface of the aluminum-deposited paper 3. The aluminum-evaporated paper 3 is configured by sequentially laminating a coated paper 7 as a paper material, a filler layer 9, an aluminum-evaporated layer 11, and a top coat layer 13.

The pressure-sensitive adhesive layer 5 is formed of an alkali-soluble pressure-sensitive adhesive. The alkali-soluble pressure-sensitive adhesive is a pressure-sensitive adhesive that easily dissolves or disintegrates in an alkaline aqueous solution, and includes, for example, an acrylic resin copolymerized with a monomer having a water-soluble group, and a hydrophilic group such as an amide compound. And those having a resin such as an acrylic resin, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, polyvinyl alcohol or the like as a main polymer.
By using this alkali-soluble pressure-sensitive adhesive, when the alkaline aqueous solution reaches the pressure-sensitive adhesive layer 5 during washing, the pressure-sensitive adhesive layer 5 is dissolved or disintegrated, and the aluminum-deposited label 1 is easily removed. Moreover, since it is not necessary to use an adhesive having a low adhesive force to facilitate removal, the aluminum vapor-deposited label 1 does not peel off due to cooling of a beer bottle or the like at the stage of use. The thickness of the pressure-sensitive adhesive layer 5 is not particularly limited, but is generally about 15 μm or more and 40 μm or less.

Although the coated paper 7 is used as a paper material in the aluminum vapor-deposited label 1, other than the coated paper 7, for example, high quality paper, medium quality paper, bleached kraft paper, unbleached kraft paper, unglazed unbleached paper Kraft paper, liner paper, pure white roll, glassine paper and the like can be used as the paper material.
Among these paper materials, a coated paper which is hardly impregnated with a resin composition for forming the filling layer 9 described later is preferably used. The weighing of these paper materials is not particularly limited. For example, those weighed from 30 g / m ² or more and 250 g / m ² or less are appropriately selected and used depending on the purpose of use. Since the paper material such as the coated paper 7 has a property of allowing liquid to permeate, it does not prevent the alkaline aqueous solution from reaching the adhesive layer 5 when the beer bottle or the like is washed with the alkaline aqueous solution.

The filler layer 9 is provided to provide a smooth surface on the coated paper 7 to enhance the glossiness of the aluminum deposited layer 11 described later. It is formed by coating. Since the filling layer 9 is made alkali-soluble, when the beer bottle or the like is washed with an alkaline aqueous solution, it easily dissolves or disintegrates, and does not prevent the alkaline aqueous solution from reaching the adhesive layer 5. The thickness of the filling layer 9 is not particularly limited, but is generally about 1 μm or more and 10 μm or less.

The aluminum deposition layer 11 is formed by evaporating and attaching metal aluminum. The metallic gloss of the aluminum-deposited label 1 is exhibited by the aluminum-deposited layer 11. Aluminum deposition layer 1
1 is much thinner than aluminum foil,
Instantly destroyed by alkaline aqueous solutions. Therefore,
At the time of washing with the alkaline aqueous solution, it does not prevent the alkaline aqueous solution from reaching the pressure-sensitive adhesive layer 5. The thickness of the aluminum deposition layer 11 is preferably 0.03 μm or more and 0.08 μm or less, particularly preferably 0.04 μm or more and 0.06 μm or less. If the thickness of the aluminum deposited layer 11 is less than the above range, the metallic luster of the aluminum deposited label 1 may be insufficient. Conversely, if the thickness of the aluminum vapor-deposited layer 11 exceeds the above range, the aluminum vapor-deposited layer 11 is not only uneconomical, but also takes time to destroy the aluminum vapor-deposited layer 11 with the alkaline aqueous solution, which prevents the alkaline aqueous solution from reaching the adhesive layer. Sometimes.

The top coat layer 13 is provided to protect the aluminum vapor deposited layer 11 and to provide a smooth surface on the aluminum vapor deposited layer 11, and the surface of the aluminum vapor deposited layer 11 is coated with a resin composition. It is formed by doing. Since the top coat layer 13 is alkali-soluble, when the beer bottle or the like is washed with an alkaline aqueous solution, it is easily dissolved or disintegrated, and does not prevent the alkaline aqueous solution from reaching the adhesive layer 5. Although the thickness of the top coat layer 13 is not particularly limited, it is generally about 0.1 μm or more and 1.0 μm or less.

When the beer bottle or the like to which the aluminum-deposited label 1 is attached is washed with an alkaline aqueous solution, the top coat layer 13 is first dissolved or disintegrated, the aluminum-deposited layer 11 is destroyed, and then the sealing layer 9 is removed. Upon dissolution or disaggregation, the alkaline aqueous solution permeates the coated paper 7 and reaches the pressure-sensitive adhesive layer 5, and the aluminum-deposited label 1 is easily removed in a very short time.

FIG. 2 is a sectional view of an aluminum-deposited label 15 according to another embodiment of the present invention. The aluminum-deposited label 15 includes an aluminum-deposited paper 3, an adhesive layer 5 provided on the back surface of the aluminum-deposited paper 3, a print layer 17 provided on the aluminum-deposited paper 3, and an overcoat layer 19. The configurations of the aluminum-deposited paper 3 and the pressure-sensitive adhesive layer 5 are the same as those of the embodiment shown in FIG. It is configured to be laminated.

The printing layer 17 is formed by printing on the top coat layer 13, and a trademark, a manufacturer / seller, a manufacturing date, and the like are displayed on the printing layer 17.

The overcoat layer 19 is provided to protect the print layer 17 and to provide a smooth surface on the top coat layer 13 and the print layer 17. It is formed by coating the surface with a resin composition. Since this overcoat layer 19 is alkali-soluble,
When a beer bottle or the like is washed with an alkaline aqueous solution, it is easily dissolved or disintegrated, and does not prevent the alkaline aqueous solution from reaching the pressure-sensitive adhesive layer 5. The thickness of the overcoat layer 19 is not particularly limited, but is generally about 0.1 μm or more and 1.0 μm or less.

When the beer bottle or the like to which the aluminum-deposited label 15 is attached is washed with an alkaline aqueous solution, the overcoat layer 19 is first dissolved or disintegrated, then the top coat layer 13 is dissolved or disintegrated, and then the aluminum-deposited layer is dissolved. 11 is destroyed, then the sealing layer 9 is dissolved or disintegrated, and the alkaline aqueous solution penetrates the coated paper 7 and reaches the pressure-sensitive adhesive layer 5, and the aluminum-deposited label 15 is easily removed in a very short time. You.

The structure of the aluminum vapor-deposited label of the present invention is not limited to those shown in FIGS. For example, various specifications can be changed without changing the gist of the present invention, such as providing a release paper layer on the back surface of the pressure-sensitive adhesive layer 5.

[0025]

[Example] [Production of labels of Examples and Comparative Examples] [Example] Alkali-soluble on the back surface of aluminum-evaporated paper composed of laminated coated paper, filler layer, aluminum-evaporated layer and top coat layer. (BPW5503 from Toyo Ink Mfg. Co., Ltd.) was applied so that the applied amount was 20 g / m ^{2 in} terms of solid content to form an adhesive layer, and the aluminum vapor-deposited label of the example was obtained. .

[Comparative Example 1] A pressure-sensitive adhesive was used in the same manner as in Example except that a modified polyvinyl alcohol-based pressure-sensitive adhesive was used.
The aluminum vapor-deposited label of Comparative Example 1 was obtained.

Comparative Examples 2 and 3 An aluminum foil having a thickness of 7 μm and a coated paper were wet-laminated via an adhesive layer made of an alkali-soluble adhesive. And
An alkali-soluble pressure-sensitive adhesive (see “B
PW5503 ”) at an application amount of 20 g / m 2 in terms of solid content.
It was applied at ² to form a pressure-sensitive adhesive layer to give the label of Comparative Example 2.

A label of Comparative Example 3 was obtained in the same manner as in Comparative Example 2, except that the adhesive used was an acrylic resin-based adhesive ("BPW5526" manufactured by Toyo Ink Manufacturing Co., Ltd.).

[Evaluation of Labels of Examples and Comparative Examples] Labels (with a width of 50 mm and a length of 50 mm) of the Examples and Comparative Examples were attached to beer bottles, and the labels were weighed by a 2 kg roller.
And left for 10 days. The leaving temperature is 5 ℃,
Three levels of 20 ° C and 40 ° C were used. Thereafter, the beer bottle was immersed in a 4% by weight aqueous solution of potassium hydroxide at 35 ° C., and the time until the label was removed was measured every 10 minutes until 2 days later. The evaluation results are shown in Table 1 below.

[0030]

[Table 1]

In Table 1, the labels of the examples using aluminum vapor-deposited paper and having a pressure-sensitive adhesive layer formed with an alkali-soluble pressure-sensitive adhesive require a shorter time to be removed than other labels. This indicates that the aluminum-deposited label of the present invention can be easily removed. The time required for removing the label can be further reduced by increasing the temperature of the alkaline aqueous solution for immersing the bottle to which the label of the present invention has been applied.

[0032]

As described above, the aluminum vapor-deposited label of the present invention can be easily removed when a beer bottle or the like is reused. Therefore, it is not necessary to set the adhesive force of the adhesive layer to be weaker, and therefore, there is no possibility that the adhesive layer is peeled off by cooling or the like at the stage of use.

Further, since aluminum-evaporated paper is used, the appearance of printing is clearer and more excellent in aesthetics than a label using aluminum foil.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an aluminum vapor-deposited label according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view of an aluminum-deposited label according to another embodiment of the present invention.

[Explanation of symbols]

 1, 15: Aluminum vapor-deposited label 3: Aluminum vapor-deposited paper 5: Adhesive layer 7: Coated paper 9: Sealing layer 11: Aluminum vapor-deposited layer 13: Top coat layer 17 ... printing layer 19 ... overcoat layer

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[Procedure amendment]

[Submission date] March 5, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

SUMMARY OF THE INVENTION The invention was made in order to achieve the above object, comprises an aluminum metallized paper, and an adhesive layer of an alkali-soluble provided on a rear surface of the aluminum deposited paper, the adhesive The main component of the agent layer is resin
Aluminized label is a (claim 1).

Claims (3)

[Claims] 1. An aluminum-evaporated label comprising an aluminum-evaporated paper and an alkali-soluble pressure-sensitive adhesive layer provided on the back of the aluminum-evaporated paper. 2. The aluminum-evaporated paper is formed by sequentially laminating a paper material, a filler layer, an aluminum-deposited layer, and a top coat layer, and the filler layer and the top coat layer are alkali-soluble. 2. The aluminum vapor-deposited label according to 1. 3. A printing layer and an overcoat layer are sequentially laminated on the surface of the aluminum-evaporated paper, and the overcoat layer is alkali-soluble.
The aluminum vapor deposition label according to 1.