JP2850192B2 - Stretch label, method of manufacturing the same, and container with stretch label - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, bottles, cans, PE
The present invention relates to a stretch label attached to a container such as a T bottle.

[0002]

2. Description of the Related Art In general, a stretch label 21 is formed by printing a stretch film having a self-stretch property made of polyethylene or the like and having a tubular shape. It is fitted externally from above a container 22, such as a PET bottle, into which a beverage or the like is filled.

[0003] Further, in the case where the food and drink, medicine, and the like are filled in the container 22 on which the stretch label 21 is mounted, after the food and drink, the medicine, and the like are filled in the container 22, the container 22
12 may be sterilized by a hot shower from the outside.

[0004]

Such a stretch label 21, as shown in FIGS. 9 and 10, is heated by hot water when a hot water shower is applied.
In some cases, the upper and lower ends of the label 21 are curved outward, and the upper and lower ends of the label are separated from the container. Therefore, there has been a problem that the hot water of the shower enters between the stretch label 21 and the container 22, and the stretch label 21 is easily slipped off.

[0005] In addition, horizontal wrinkles 23 and the like are generated during the low-temperature heat sterilization treatment, which causes a problem that the appearance is unfavorable. Further, when the container 22 is a PET bottle filled with carbonated beverage, the above problem tends to be more remarkable because the body of the PET bottle expands in the radial direction during the low-temperature heat sterilization treatment.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the label does not slip off even when subjected to low-temperature heat sterilization, and furthermore, it is a stretch label which is excellent in appearance without wrinkles or the like. Another object of the present invention is to provide a stretch label mounting container.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made as a stretch label, a method for manufacturing the same, and a container for attaching a stretch label. A stretchable film, which is made of a stretch film 2 having a property and is attached to the container body 5, has a property that when stretched to 70 ° C. or more, the stretch film 2 bends in the mounting direction, and The stretch film 2 is formed in a tubular shape such that the side that becomes concave when curved is the inner surface.

[0008] The feature of the manufacturing method is that 70
Printing is performed on a long stretch film 2 having a property of bending in the longitudinal direction when heated to a temperature of not less than ° C, and the stretch film 2 is cut into a predetermined width. That is, both ends 2a and 2b of the stretch film 2 are superposed and adhered so that the side becomes the inner surface, and the stretch film 2 is formed into a cylindrical shape with the longitudinal direction as an axis.

Further, the stretch label mounting container is characterized in that it comprises a stretch film 2 having self-stretchability, and when the stretch film 2 is heated to 70 ° C. or more, it curves in the mounting direction to the container body 5. That is, a stretch label formed in a cylindrical shape so that the side that becomes concave when curved is the inner surface is attached to the container body 5.

[0010]

In other words, the stretch label 1 of the present invention is a stretch label 1 formed in a tubular shape such that the stretch film 2 is curved in the direction in which the label is attached and the concave side when curved is inside. Therefore, when such a stretch label 1 is attached to the container body 5 and subjected to, for example, low-temperature heat sterilization, the stretch label 1
, A force acts in a direction in which the upper and lower ends are curved toward the container.

Therefore, the entire stretch label 1 can be closely adhered along the container body 5, and particularly the upper and lower ends of the stretch label 1 can be securely adhered to the container body 5, and a hot water shower enters between the container and the label. Difficult,
Labels are less likely to slip off during heat sterilization.

[0012]

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

First, the structure of the stretch label of the present invention will be described. In FIG. 1, reference numeral 1 denotes a stretch label formed into a cylindrical shape by polymerizing the ends and being bonded by an adhesive 3 or an adhesive means such as heat sealing. The stretch label 1 has a vinyl acetate content of 1 to 6% by weight. Stretch film 2 made of ethylene-vinyl acetate copolymer
And a print layer 4 provided on the inner surface side of the stretch film 2.

If the vinyl acetate content of the ethylene-vinyl acetate copolymer of the stretch film 2 is less than this range, the self-stretching property is poor, and if it exceeds this range, it becomes too flexible to print or attach labels. Therefore, it is desirable to be within the above range.

The stretch film 2 is 70 °
When heated to C to 90 ° C., the stretch film 2 has such a property that it is slightly curved in the mounting direction A to the container shown in FIG. 2, and the concave surface when curved is on the inner surface side. Is formed in a cylindrical shape. Further, when the stretch film 2 is heated to 70 ° C. to 90 ° C., the stretch film 2 has such a property that it simultaneously bends and shrinks slightly in the mounting direction to the container.

The printed layer 4 is provided with a corona discharge treatment on one surface side of the stretch film 2 and is provided on the treated surface by a method such as gravure printing.

Next, a method of manufacturing the stretch label 1 having the above configuration will be described.

First, as shown in FIGS. 4 (a) and 4 (b), an ethylene-vinyl acetate copolymer having a vinyl acetate content of 1 to 6% by weight was melted at 180 to 220.degree. It is extruded into a thin film form from a die 10, and is adhered to a cooling drum 12 to be cooled and solidified, thereby forming a stretch film 2.
Is obtained.

Next, the stretch film 2 is rolled.
The film is slightly stretched in the longitudinal direction X by 13 to give heat shrinkage in the longitudinal direction. This heat shrinkage is 70 to 9
When heated to 0 ° C., it shrinks by 1 to 10%.

Further, the stretch film 2 is transferred, and a corona discharge treatment is applied to the other surface 14b of the stretch film 2 which is opposite to the one surface 14a in close contact with the cooling drum 12.

Next, on the other side 14b of the stretch film 2 on which the surface treatment has been performed, characters, pictures, and the like are printed by a known printing means such as gravure printing to form a printed layer 4.

The stretch film 2 is cut into a predetermined width according to the size of the container or the like to form a long stretch film 2. As shown in FIG. 5, for example, as shown in FIG. 5, when the stretch film 2 is heated to 70 to 90 ° C., the other side 14 b different from the one side 14 a in close contact with the cooling drum 12 is used. Has the property of being curved in the longitudinal direction A so that the surface becomes concave.

Further, this stretch film 2 is polymerized by bonding both ends 2a and 2b via an adhesive 3 so that the other side 14b of the surface 14a of the stretch film 2 closely contacting the cooling drum 12 is on the inside. It is formed in a cylindrical shape (see FIG. 6A),
The tubular stretch film 2 is cut into an appropriate length (see FIG. 6B) to form the stretch label 1 as shown in FIG.

Next, a method of using the stretch label 1 manufactured as described above will be described.

First, the stretch label 1 formed in a cylindrical shape is opened and made into a cylindrical shape.
As shown in FIG. 2, external fitting is performed from above the T bottle 5.

After the PET bottle 5 with the stretch label 1 attached thereto is filled with the carbonated beverage,
In order to sterilize the beverage in the ET bottle 5, low-temperature heat sterilization is performed. In this low-temperature heat sterilization method, a hot water shower at a temperature of about 70 to 90 ° C. is applied from the outer surface of the PET bottle 5 for about 5 to 40 minutes to heat-sterilize the beverage inside.

At this time, the body of the PET bottle 5 filled with the carbonated beverage expands in the radial direction B by heating.

Further, since a force acts in a direction in which the upper end 1a and the lower end 1b of the stretch label 1 bend toward the PET bottle 5 (see the dotted line in FIG. 3), the upper end 1a of the stretch label 1 is formed.
The stretch label 1 is attached along the PET bottle 5 in a state in which the whole is in close contact with each other without any gap between the lower end portion 1b and the PET bottle 5.

Therefore, the hot water of the hot water shower hardly enters between the PET bottle 5 and the stretch label 1 during the low-temperature heat sterilization treatment, so that the stretch label 1 can be prevented from slipping down.

At the same time, since the stretch film 2 used for the stretch label 1 has a property of slightly shrinking vertically when heated, the stretch label 1 is attached to the PET bottle 5 when pasteurized by low-temperature heat treatment. Shrink slightly in direction A. Such a curvature and shrinkage provide a high effect particularly for preventing the horizontal wrinkles generated in the stretch label 1.

Although the present invention is particularly effective for a PET bottle 5 or the like filled with a carbonated beverage which expands at the time of low-temperature heat sterilization as in the above embodiment, the container on which the stretch label 1 of the present invention is mounted is not limited to this. , In addition, any container that can be subjected to pasteurization treatment such as cans and bottles can be used, and the cross-sectional shape of the container is also cylindrical,
It is not limited to the above embodiment such as an oval. In addition, the contents in the container are not limited to carbonated drinks, and foods, medicines, and the like may be used.

Further, in the above embodiment, the stretch film 2 cooled and solidified was subjected to a stretching treatment to impart heat shrinkage. However, this stretching treatment is not a condition, and the heat shrinkage not subjected to the stretching treatment is not required. It is also possible to use a stretch film having no properties.

Further, in the above embodiment, a container having a vertical body such as a PET bottle 5 was used.
Can be attached to the container 5 having a gentle curved surface 5a as shown in FIG. When the stretch label 1 is mounted on the container 5 as described above, the stretch label 1 has the property of bending toward the container as described above, so that the stretch label 1 can be mounted on the upper and lower end portions 1a and 1b in a more intimate state.

In the above embodiment, the gravure printing is applied to the printing layer 4, but the printing surface may be formed by other known printing methods.

In the above embodiment, the material of the stretch film 2 is an ethylene-vinyl acetate copolymer.
For example, a mixture of an ethylene-vinyl acetate copolymer containing 6% by weight of vinyl acetate and a low-density polyethylene at 50% each may be used. Further, a linear polyethylene, an ethylene-propylene random copolymer, and the like, and a film in which these are laminated What is essential is that the stretch label has a self-stretching property that bends in the vertical direction of the stretch label 1 when heated to 70 to 90 ° C.

[0036]

As described above, the stretch label of the present invention is a stretch label formed into a tubular shape such that the concave surface is on the inside of the stretch film having the property of being curved in one direction. However, when such a stretch label is attached to a container and subjected to a low-temperature heat sterilization treatment, the entire label can be kept in close contact with the container, and especially at the upper and lower ends of the label, it can be securely adhered to the container. In addition, it is possible to prevent hot water from entering between the stretch label and the container from the end of the label, and prevent the label from slipping off the container during the low-temperature heat sterilization treatment.

Further, since such a stretch label is closely attached to the container even at the time of low-temperature heat sterilization treatment, it is possible to effectively prevent wrinkles and sagging, especially generation of wrinkles. As a result, a stretch label which does not generate wrinkles or the like and has a very excellent appearance can be obtained.

Further, when the stretch label of the present invention is mounted on a heat-resistant pressure-blown bottle made of polyester, even if the bottle expands in the radial direction by a low-temperature heat sterilization treatment after filling with a carbonated beverage, horizontal wrinkles are produced. This makes it possible to obtain a container fitted with a stretch label having an excellent appearance that does not cause any appearance.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a stretch label according to the present invention.

FIG. 2 is a perspective view showing a state where the stretch label of the present invention is mounted on a container.

FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

4A is a front view showing a method for manufacturing a stretch film, and FIG. 4B is an enlarged perspective view of a main part of FIG.

FIG. 5 is a perspective view showing a state where a stretch film is heated.

6A is a perspective view showing a state in which the stretch film is formed in a tubular shape, and FIG. 6B is a front view showing a state in which the stretch film is cut.

FIG. 7 is a perspective view showing a state in which the stretch film is formed into a stretch label by forming the stretch film into a tubular shape.

FIG. 8 is a partial cross-sectional view showing a state where a stretch label according to another embodiment is attached to a container.

FIG. 9 is a perspective view showing a PET bottle after a conventional low-temperature heat sterilization treatment.

FIG. 10 is an enlarged sectional view of a main part taken along line YY of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stretch label 2 Stretch film 4 Printing layer 5 PET bottle

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B29K 23:00 105: 02 (56) References JP-A-7-191607 (JP, A) JP-A-60-203653 (JP, A) Hikaru Hei 3-89474 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB name) G09F 3/04 B29C 61/10 B32B 27/00 B32B 27/28 101 B29K 23:00 B29K 105: 02

Claims (5)

(57) [Claims] 1. A stretch film having self-stretchability
(2), the stretch film (2) in the tubular stretch label to be attached to the container body (5)
The stretch film (2) is formed in a tubular shape such that it has a property of bending in the mounting direction when heated to at least ° C, and the side that becomes concave when curved becomes an inner surface. Stretch label. 2. The stretch label according to claim 1, wherein the stretch film is made of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 1 to 6% by weight. 3. A long stretch film having a property of being bent in a longitudinal direction when heated to 70 ° C. or more.
(2) is printed, the stretch film (2) is cut into a predetermined width, and thereafter, the both ends (2a),
(2b) a method for producing a stretch label, comprising polymerizing and adhering to form a tube with the longitudinal direction as an axis. 4. A stretch film having self-stretchability
When the stretch film (2) is heated to 70 ° C. or more, the stretch film (2) has a property of bending in the mounting direction to the container body (5), and the side that becomes concave when bent is the inner surface. A label-equipped container, wherein a stretch label formed into a tubular shape is attached to a container body (5). 5. The container according to claim 4, wherein the container body is a heat-resistant pressure blow bottle made of polyester.