JPH0876689A - Label for glass bottle - Google Patents

Abstract

PURPOSE: To obtain enough water resistance and peeling property same as a casein adhesive to a glass bottle coated with a masking agent by forming a print layer on the surface of a paper base and forming an adhesive layer comprising acryl delayed-tacking adhesive on the back surface of the paper base. CONSTITUTION: The label is produced by forming a print layer 3 and an overcoating layer 4 on the surface of a paper base body 1 and forming an adhesive layer 2 comprising an acryl delayed-tacking adhesive on the back surface of the paper base body 1. By using the acryl delayed-tacking adhesive as the adhesive layer 2, same water resistance and peeling property (washing property of a bottle) as those of a casein adhesive can be obtd. even for a glass bottle coated with a masking agent. By applying the adhesive layer 2 by 10 to 18g/m<2> coating amt., the adhesive strength with glass bottles and water resistance are more preferably maintained, and good washing property of a bottle with an alkali soln. can be added to the bottle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label used for a glass bottle such as a beer bottle, particularly a glass bottle coated with a masking agent so that the surface thereof is not easily scratched.
The present invention relates to a label having both water resistance and peeling of the label.

[0002]

2. Description of the Related Art A glass bottle filled with beer, liquor or the like has a label on which a product name and contents are printed with a casein adhesive applied. The label attached with the casein-based adhesive in this way is usually put in a refrigerator and cooled, and even if water droplets are attached, the label does not come off.

Further, the recovered glass bottle can be peeled off the label by immersing it in a sodium hydroxide aqueous solution of about 3% (50 to 80 ° C.) or by washing with a brush.

The casein adhesive has such properties of water resistance and label releasability as described above, but it requires a skill to control the amount of the adhesive applied, and it is also necessary during the sticking process. Adhesive droplets were scattered and deteriorated the work environment.

Further, the coating amount of the adhesive is an important factor because it determines the water resistance and peelability of the label, but as described above, a skilled technique is required to control the coating amount. It was

On the other hand, such control of coating amount,
Also, there is a delayed tack type adhesive as an adhesive capable of improving the working environment. This delayed tack type adhesive is an adhesive that exhibits adhesiveness at a constant temperature.
It can be applied to the back surface of the label substrate, and can be attached to a glass bottle only by applying a certain amount of heating during attachment.

Also, the delayed tack type adhesive is 50
It could be peeled off with hot water at a temperature of ℃ or more, and was suitable as an adhesive for a glass bottle label for the purpose of recovery.

[0008]

By the way, a masking agent as disclosed in JP-A-5-77837 is provided so that the surface of a glass bottle for the purpose of recovery is not easily scratched even when a glass bottle sticker is rubbed against it. Was generally coated, and it was not possible to apply a label having water resistance and peelability as it is to an ordinary glass bottle. For example, even if the label can exhibit water resistance when used in a glass bottle that is not coated with a masking agent, when used in a glass bottle coated with a masking agent,
Many of them did not exhibit sufficient water resistance.

An object of the present invention is to provide a label having sufficient water resistance and peelability to a glass bottle coated with a masking agent as described above, like a casein adhesive.

[0010]

The present invention is a glass bottle label in which a printed layer is provided on the front surface of a substrate made of paper and an adhesive layer made of an acrylic delayed tack type adhesive is provided on the back surface. The coating amount of the acrylic delayed tack adhesive is preferably 10 to 18 g / m ² .

[0011]

In the label of the present invention, an acrylic delayed tack adhesive is used as the adhesive layer. Therefore, even in a glass bottle coated with a masking agent, the same water resistance and peelability (casein adhesive) as the casein adhesive ( It has the ability to wash bottles.

Further, the coating amount of the adhesive layer is 10 to 18 g / m 2.
By setting it to ² , the adhesive strength to the glass bottle and the water resistance can be further improved and the suitability for washing with an alkaline solution can be more suitably imparted.

[0013]

EXAMPLE As shown in FIG. 1, a label of the present invention is formed by bonding an acrylic delayed tack type adhesive to the back surface of a substrate 1 made of paper having a printing layer 3 and an overcoat layer 4 on the surface. It is a glass bottle label provided with layer 2. Further, when an aluminum vapor deposition layer is provided to impart a metallic luster to the label, as shown in FIG. 2, the vapor deposition sealing layer 10, the aluminum vapor deposition layer 9, the printing primer layer 8, the printing layer 3 are provided on the surface. , And an adhesive layer 2 made of an acrylic delayed tack type adhesive may be provided on the back surface of a base material 1 made of paper on which an overcoat layer 4 is provided.

Here, each of the overcoat layer 4, the printing layer 3, the printing anchor coat layer 8 and the vapor deposition sealing layer 10 used for the label is a material which is soluble in an alkaline cleaning liquid at the time of bottle washing as described later. Is preferably used.

Next, the material used for the label of the present invention will be specifically described. First, it is particularly preferable to use paper having a water elongation of 2.5% or less as the base material 1. This is because when a beer bottle or the like with a label attached thereto is cooled and water drops adhere to the bottle, the base material 1 of the label extends, but when the paper having an underwater elongation of more than 2.5% is used as the base material 1. The elongation of the base material 1 causes cracks in the sealing layer, the printing layer, the aluminum vapor deposition layer, the precoat layer, etc. provided on the base material 1 to reduce the appearance, and the water may be released from the cracks into the base material. 1 has a problem of seeping in a large amount and tearing the label.

Further, the sealing layer 10 may be one having a bottle-washing aptitude that is peeled off by an alkali cleaning solution, and for example, Japanese Patent Publication No. 28313/1993 and Japanese Utility Model Publication 5-8615.
Resins described in JP-B No. 1-213328 and JP-B 1-221329 can be used. The resins described in these publications are soluble in alkalis, and this property imparts bottle washing suitability to the label. Primer layer 8
Is an alkali-soluble resin, and a shellac, a nitrocellulose-based resin, a mixed resin obtained by mixing a nitrocellulose-based resin with a fatty acid ester, and a resin obtained by further mixing an alkyd resin with this mixed resin are preferably used.

In order to make the printed layer 3 alkali-soluble, an ink using a nitrocellulose resin, a polyamide resin, or a mixed resin obtained by mixing these as a vehicle, or an ink further containing maleic acid is added, in the same manner as described above. It is preferable that

Further, the overcoat layer 4 is made of the vehicle of the ink used for the printing layer 3, and it is preferable that both are made of an alkali-soluble resin.

A specific example will be described below. <Example 1> On the surface of a substrate 1 made of clay-coated paper (commercial name: Comolant VMTS, manufactured by Fuji Kako Co., Ltd.) having an elongation in water of 1.2%, a phenolic resin and an aminoalkyd resin were formed by a gravure coating method. 13% by weight of a resin solution coated at 3 g / m ² (solid content), a vapor deposition stop layer 10, an aluminum vapor deposition layer 9 having a thickness of 400 Å, a printing primer layer 8 made of an acrylic resin, and a polyamide resin as a vehicle. A print layer 3 made of an ink containing 5% maleic acid and an overcoat layer 4 made of a nitrocellulose resin were sequentially provided. On the other hand, an adhesive layer 2 coated with 12 g / m ² of an acrylic delayed tack adhesive (trade name: Heat Magic DW2000W, manufactured by Toyo Ink Mfg. Co., Ltd.) was provided on the back surface to provide a label.

This label is placed on a drum heated to about 80 ° C. so that the adhesive layer 2 faces outward, and hot air of 200 ° C. is blown onto the surface of the adhesive layer 2 while being conveyed on the drum. After heating, the adhesiveness was imparted, and then the glass bottle was adhered to the surface of the glass bottle coated with the masking agent. The glass bottle to which this label was attached was tested for the adhesive strength of the label, the water resistance of the label attached, and the washability with an alkaline solution. Table 1 shows the results.

Comparative Example 1 An ethylene-vinyl acetate copolymer-based delayed tack adhesive (trade name: Heat Magic DW0001, in place of the adhesive of the adhesive layer of Example 1)
Example 1 except that Toyo Ink Mfg. Co., Ltd.) was used.
A label made of the same material as was obtained. The label was attached to a glass bottle coated with a masking agent, and the same test as in Example 1 was performed. The results are shown in Table 1.

<Comparative Example 2> A styrene-butadiene rubber-based delayed tack adhesive (trade name: EXK93-113, manufactured by Toyo Ink Mfg. Co., Ltd.) was used in place of the adhesive in the adhesive layer of Example 1. A label made of the same material as in Example 1 was obtained. The label was attached to a glass bottle coated with a masking agent, and the same test as in Example 1 was performed. The results are shown in Table 1.

[0023]

[Table 1]

Adhesive strength: O ... 500 g / 15 mm or more,
Or paper peeling occurs Δ: 200 to 500 g / 15 mm ×: less than 200 g / 15 mm Water resistance: Number of labels with an area of 90% or more affixed by immersing in water at 10 ° C for 1 month (sample number = 10) Bottle washability: Comparison with conventional casein-based adhesive when immersed in a 3% concentration aqueous sodium hydroxide solution at 70 ° C. ◎ ... Good peelability than casein-based adhesive ○ ... Equivalent to casein-based adhesive △ ... Casein Deterioration is poorer than that of the system adhesive.

Next, by changing the coating amount of the adhesive used in Example 1, the adhesive strength with respect to the glass bottle coated with the masking agent, the water resistance with the label attached, and the washability with the alkaline solution were used. I did a test. The results are shown in Table 2. The symbols and numerical values in Table 2 are the same as the adhesive strength, water resistance and bottle washing property in Table 1.

[0026]

[Table 2]

As can be seen from the above results, the label of the present invention has sufficient adhesive strength, water resistance and bottle washing property even for a glass bottle coated with a masking agent, and particularly the amount of the adhesive applied. By setting 10 to 18 g / m ² ,
The above properties are further improved.

As described above, the label of the present invention has the following features.
It has sufficient adhesive strength, water resistance, and bottle washing property even for a glass bottle coated with a masking agent, and has a function equivalent to or higher than that of a conventional casein-based adhesive.

Further, since the adhesive layer is formed on the back surface of the label base material in advance instead of applying the adhesive agent at the time of attaching the label, the application amount of the adhesive layer can be easily adjusted, and at the time of attaching the adhesive layer Since there is no contamination due to the scattering of the agent, it is hygienic and the working environment can be prevented from deteriorating.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... Adhesive layer 3 ... Printing layer 4 ... Overcoat layer 8 ... Primer layer 9 ... Aluminum vapor deposition layer 10 ... Vaporization sealing layer

Claims (2)

[Claims] 1. A label for glass bottles, wherein a printed layer is provided on the surface of a base material made of paper, and an adhesive layer made of an acrylic delayed tack adhesive is provided on the back surface. 2. The label for glass bottles according to claim 1, wherein the coating amount of the delayed tack type adhesive in the adhesive layer is 10 to 18 g / m ² .