JPH08106252A - Foam label and method for forming foam label - Google Patents

Abstract

(57) [Summary] [Object] It is an object of the present invention to provide a foamed label having an extremely excellent appearance, which does not have an extremely stepped portion in a polymerized portion of a foamed label formed in a tubular shape. In a foam label made of a rectangular heat-shrinkable foam film, a tubular shape is obtained by fixing a heat-shrink tape of a predetermined width made of the heat-shrink film so as to cover the surfaces of both ends of the foam film. The main point of the structure is that it is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, bottles, cans and PE.
The present invention relates to a label made of a foamed film attached to a container such as a T bottle and a method for forming the label.

[0002]

2. Description of the Related Art Generally, a foam label made of a foam film having a heat shrink film laminated on the outer surface of a foam sheet is used as a heat shrink label for labels such as bottles and cans.

As shown in FIG. 4, this foamed label is a heat-shrinkable film having heat-shrinkability such as polypropylene having a print layer 13 on the front and back surfaces of a heat-shrinkable foamed sheet layer 11 made of a foamable sheet. Foamed film provided with layer 12
16 of the foamed film 16 is polymerized at both ends 16a, 16b, and the polymerized part 16c is bonded at both ends 16a, 16b via an adhesive 14, or is heat-welded by ultrasonic waves ( (Not shown), as shown in FIG. 2A, it is formed in a flat tubular shape.

When the foam label 10 formed in such a flat cylindrical shape is used, a container 15 such as a bottle 15 as shown in FIG. 2B.
The container 15
In close contact.

[0005]

However, when both ends 16a and 16b of the foamed film 16 are polymer-bonded to each other by such a method, a step is formed by the thickness a of the film. As a result, when the container 15 to which the foam label 10 is attached is transferred by a machine, there is a problem that the container 15 cannot be smoothly transferred because of catching at the step portion.

Further, as described above, when both ends 16a, 16b of the foamed film 16 are polymerized and adhered via the adhesive 14 to form a tubular shape, the foamed film 16 is adhered when heat-shrinked. The fixed surface does not contract because it is fixed,
Since only the upper surface of the foamed film 16 is thermally shrunk in the circumferential direction A, as shown in FIG. 3B, the cross section of the end portion 16a on the upper surface side of the foamed film 16 is inclined and the foamed surface is exposed.

As a result, as shown in FIG. 4, a line 17 consisting of the exposed foamed surface is apparently formed on the adhesive portion of the label, and the printed colors and pictograms are divided by this line 17, resulting in a poor appearance. There was a problem of becoming. Also,
The exposed foamed surface has irregularities due to foaming, and if this part is exposed, stains tend to adhere and the aesthetics of the label are likely to be impaired.

The present invention has been made to solve the above-mentioned problems, and provides a foamed label having an extremely excellent appearance, which does not have an extreme step in the superposed portion of the foamed label formed in a tubular shape. This is an issue.

[0009]

The present invention has been made as a foam label and a method for forming the foam label in order to solve such a problem. A foam label made of a shrinkable foam film 1 is formed into a tubular shape by fixing a heat shrink tape 5 of a predetermined width made of a heat shrink film so as to cover the surfaces of both ends of the foam film 1. Is to be.

The molding method is characterized in that the outer surface of both ends of a rectangular heat-shrinkable foam film 1 is covered with a heat-shrink tape 5 of a predetermined width made of a heat-shrink film and fixed to the tube. It is to form into a shape.

[0011]

In other words, the foamed label of the present invention joins the both ends of the foamed film by covering the both ends of the foamed film constituting the foamed label with a tape made of a heat shrinkable film from the outer surface and adhering them. A smooth label surface is formed with almost no steps at the joints at both ends. As a result, when a container or the like having the foam label attached thereto is mechanically transferred, the container or the like can be transferred smoothly without being caught at the joint.

Further, when the heat shrinking treatment is applied, the tape on the surface of the joint also shrinks at the joint, so that the shrinkage of the label itself at the joint is small. Further, it is possible to prevent the foamed surface from being exposed by fixing the lower surface of the bonded foamed film and contracting only the upper surface, and as a result, it is possible to prevent the printed character picture or the like from being separated by the exposed foamed surface. .

Further, since the foamed surface is not exposed and the surface having irregularities on the label surface is not exposed, dirt is less likely to adhere.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the foamed label of the present invention will be described. Reference numeral 1 shown in FIGS. 1A and 1B indicates that the print layer 4 is provided on the lower surface of the heat shrinkable film layer 3, and the print layer 4 is further provided.
Is a foamed film in which a heat-shrinkable foamed sheet layer 2 having heat-shrinkability is laminated on the lower surface of.

The heat-shrinkable foamed sheet layer 2 is made of polypropylene resin and has a heat shrinkage of 30% or more in the circumferential direction, a specific gravity of 0.4 to 0.8 g / cm ³ , and a thickness of 80 to 3.
It is a foamed sheet in the range of 00 μm. In addition, the heat shrinkable film 3 is made of polypropylene resin and is 30% in the circumferential direction.
The film is heat-shrinkable and has a thickness in the range of 10 to 50 μm.

The print layer 4 provided on the lower surface of the heat shrinkable film layer 3 is provided with a character pattern by a known printing method such as gravure printing.

Further, the heat-shrinkable film layer 3 and the heat-shrinkable foam sheet layer 2 are laminated with an adhesive agent by a known dry laminating method.

Both ends 1a, 1b of the foam film 1
The upper surface side of is subjected to corona discharge treatment so that it can be easily bonded.

Next, a molding method for forming the foam label 6 will be described. First, corona discharge treatment is applied to the outer surface of the heat-shrinkable film at both ends 1a and 1b of the foamed film 1, and then both ends 1a of the foamed film 1 are placed so that the heat-shrinkable film 3 becomes the outer surface as shown in FIG. , 1b are polymerized to form a flat tubular shape.

An adhesive tape 5 made of a heat-shrinkable film is adhered to the outer surface of the polymerized portion 1c where the both ends 1a and 1b of the foamed film 1 are overlapped with each other via a urethane adhesive 8 so as to cover the polymerized portion 1c. Then, both ends 1a and 1b of the foamed film 1 are joined. At this time, since the upper surfaces of both ends 1a and 1b of the foamed film 1 are subjected to corona discharge treatment, the adhesion can be facilitated. The adhesive tape 5 is made of a film of polyethylene terephthalate or polypropylene having a thickness of about 30 to 50 μm, and is formed into a tape shape having a heat shrinkability in the lateral direction.

Next, the foamed label 6 formed in this way
The method of attaching the to the container will be described.

Reference numeral 7 in FIG. 2 is a bottle containing a carbonated beverage having a curved side surface. The foamed label 6 formed in the tubular shape is externally fitted and attached to the bottle 7. At this time, the diameter of the foam label 6 is larger than the diameter of the bottle 7, and the foam label 6 is loosely attached to the bottle 7.

Next, the bottle 7 having the foamed label 6 attached thereto is heated to cause the foamed label 6 to thermally shrink, and the bottled label 7 is closely attached to the bottle 7.

As described above, the level difference on the surface of the bonded portion 1c of the attached foam label 6 is only 30 to 50 μm, which is the thickness b of the adhesive tape 5, and the thickness of the foam label 6 is about 80 when there is no adhesive tape 5. It is possible to make the step smaller than the step of 350 μm.

When the foamed label 6 is attached to the bottle 7, the bottle 7 is heated to cause the attached foamed label 6 to shrink by heat. At this time, as shown in FIG. Since the label 6 shrinks in the circumferential direction A, the foamed label 6
The surface will be pulled. Therefore, the joint portion 1c of the foam label 6 is also pulled in the circumferential direction A, but since the joint portion 1c is covered with the adhesive tape 5 made of a heat-shrinkable film, the end portion of the foam label 6
Only the upper surfaces of 1a and 1b are not contracted and pulled in the circumferential direction A, and the foamed surfaces are not obliquely exposed at both ends 1a and 1b. Furthermore, since the adhesive tape 5 also shrinks in the same direction as the foamed film 1, no wrinkles, distortions or the like occur in the overlapping portion 1c.

In the above embodiment, the material of the foamed sheet 2 of the foamed label 6 is the foamed film made of polypropylene, but the material of the foamed sheet 2 is not limited to this, and may be polyethylene, ethylene, or the like. Vinyl acetate copolymers, mixtures of these with polypropylene, and the like can be used.

In the above examples, a film made of polypropylene resin was used as the heat-shrinkable film layer 3. In addition to this, uniaxial or biaxial stretching of polyester such as polyethylene terephthalate, polyvinyl chloride, polyethylene or the like is applied. Various films having heat-shrinkability provided by the above may be used, and the material of the heat-shrink film layer 3 is not limited to this.

Further, in the above embodiment, the foam sheet 2 has a thickness of about 80 to 300 μm, and the adhesive tape 5 has a thickness of 30.
Although it is set to 50 μm, the foam sheet 2 and the adhesive tape 5 are used.
The thickness of the film is not limited to this,
Since the thickness of the adhesive tape 5 is considerably thinner than the thickness of the foam sheet 2 as described above, the effect of reducing the level difference on the label surface when bonded is achieved. It is desirable that the film is considerably thinner than the thickness of the sheet 2.

Further, although the print layer 4 of the above-mentioned embodiment is provided with a character pattern or the like by gravure printing, it can be printed by a known printing method. Also, it is not a condition that the entire print layer 4 is printed,
It may be the print layer 4 that is partially printed.

The foam label 6 does not have to be the foam film 1 in which the heat-shrinkable foam sheet layer 2 and the heat-shrinkable film layer 3 are laminated as described above, and the print layer is formed on the surface of the heat-shrinkable foam sheet layer 2. The foamed label 6 may be composed of only the heat-shrinkable foamed sheet layer 2 having

Further, in the above embodiment, both ends 1a and 1b of the heat-shrinkable foam film 1 were polymerized to form a tubular shape, but it is not necessary to polymerize both ends 1a and 1b of the foam film 1. For example, as shown in FIG. 3, both ends 1a, 1b are covered with an adhesive tape 5 on the surface where the ends 1a, 1b are in contact with each other.
It is also possible to use the foam label 6 that is formed by joining the two.

Although the container to which the foam label 6 is attached is the bottle 7 in the above embodiment, the container to which the foam label 6 is attached is not limited to this, and a container such as a can or a bottle that can be subjected to heat shrinkage treatment. If so, all are applicable.

[0034]

As described above, the foam label of the present invention is
By covering and bonding the end portion of the foam sheet with a tape made of a heat-shrinkable film, it is formed into a tubular shape, so there is little step difference at the end portion of the foam sheet in the adhesive portion,
It has a smooth surface. As a result, when the container with the foam label attached thereto is mechanically transferred, the container with the foam label attached can be smoothly transferred without being caught at the bonding portion.

Further, it is possible to prevent the foamed surface from being exposed, so that the printed character or the like is not divided by the exposure of the foamed surface, and dirt is not attached to the exposed portion of the foamed surface.
There is also an effect that a label having an excellent appearance can be provided.

[Brief description of drawings]

FIG. 1A is an enlarged cross-sectional view of an essential part showing an embodiment of a foamed label according to the present invention, and FIG. 1B is an enlarged cross-sectional view of an essential part of a foamed label after heat-shrinking treatment.

FIG. 2A is a perspective view of a foam label of the present invention and a conventional foam label, and FIG. 2B is a perspective view showing a state of being attached to a container.

FIG. 3 is an enlarged sectional view of a main part of a foamed label according to another embodiment.

FIG. 4A is an enlarged cross-sectional view of a main part of a conventional foamed label, and FIG. 4B is an enlarged cross-sectional view of a main part of the foamed label after heat-shrinking treatment.

FIG. 5 is a front view showing a container after a heat-shrinking process in which a conventional foam label is attached.

[Explanation of symbols]

 1 Foamed Film 2 Heat Shrinkable Foam Sheet Layer 3 Heat Shrinkable Film Layer 4 Printing Layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Keikin 5-3-18 Imazu Kita, Tsurumi Ward, Osaka City, Osaka Prefecture Fuji Seal Industry Co., Ltd.

Claims (4)

[Claims] 1. A foamed film having a rectangular heat shrinkability.
(1) A foamed label consisting of the foamed film (1)
A foamed label, which is formed in a tubular shape by fixing heat-shrinkable tape (5) of a predetermined width made of a heat-shrinkable film so as to cover the surfaces of both ends of the foamed label. 2. A foamed film (1) having the heat shrinkability.
The foamed label according to claim 1, wherein is a laminated film of a heat-shrinkable foam sheet (2) and a heat-shrinkable film (3). 3. A foamed film (1) is polymerized at both ends thereof, and a heat-shrinkable tape (5) of a predetermined width made of a transparent heat-shrinkable film is fixed to cover the outer surface of the polymerized part. It is formed in the shape of a circle.
Alternatively, the foam label according to claim 2. 4. A rectangular foam film having heat shrinkability.
A method for forming a foamed label, characterized in that the foamed label is formed into a tubular shape by covering the outer surface sides of both ends of (1) with a heat-shrinkable tape (5) of a predetermined width made of a heat-shrinkable film and fixing them.