JP2020076837A - Heat-shrinkable tubular label and labeled container - Google Patents

Abstract

To provide a heat-shrinkable tubular label that can be used with peace of mind in the event of a drop or the like and is easy to open.SOLUTION: The heat-shrinkable tubular label attached to the body of the container includes a pair of first perforations extending from the upper end to the lower end and a pair of second perforations extending on the center side from at least one of the upper and lower ends of the heat-shrinkable tubular label provided on both sides with the pair of first perforations interposed therebetween. The pair of second perforations are respectively connected to the pair of first perforations located in the vicinity thereof. In the state of being attached to the container, the angle between the second perforation and the first perforation is 45 degrees or less, and the angle between the second perforation and the end of the heat-shrinkable tubular label is 45-155 degrees.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention generally relates to a heat-shrinkable tubular label, and more particularly to a heat-shrinkable tubular label having improved perforation opening properties. The invention also relates to a labeled container fitted with such a heat-shrinkable tubular label.

  BACKGROUND ART PET bottles filled with beverages and the like are equipped with heat-shrinkable, tubular labels having various designs. It is desirable that such a PET bottle be collected and recycled after use, but for this purpose, it is necessary to separately collect the container body, the cap, and the label. In order to easily separate the container and the label, these labels are provided with one or two perforations along the entire length from the upper end to the lower end.

  Here, if the perforations are formed with a fine pitch, there arises a problem that when the bottle is accidentally dropped during handling, the perforations, especially the central portion, are damaged by the impact. On the other hand, when the perforations are formed with a coarse pitch, there arises a problem that the unsealing property is deteriorated.

  The present inventors have proposed a technique relating to a heat-shrinkable tubular label that is attached to the side surface of a plastic container, can be used with peace of mind even when a situation such as dropping occurs, and realizes easy opening (Patent References 1 and 2).

JP, 2011-158554, A JP, 2014-219541, A

  However, in recent years, there has been a demand for a label that is easier to open and that can be easily opened by children.

  FIG. 5 shows a front perspective view of a container to which a conventional heat-shrinkable tubular label is attached. This heat-shrinkable tubular label 1 has an adhesive portion 15 in which both ends of the label are overlapped and adhered. A pair of perforations 12 extending from the upper end to the lower end are provided on both sides of the adhesive portion 15, and the pair of perforations 12 are sandwiched in between to face the center side from the upper and lower ends of the label. A pair of second perforations 13 each having a short length are provided.

  In such a label, when a cut is made in the second perforation 13 to separate it, it is necessary to break the portion where the perforation is not provided, which requires a large force.

  An object of the present invention is to provide a heat-shrinkable tubular label that can be used with peace of mind even if a situation such as dropping occurs and that can be opened with a smaller force.

  Another object of the present invention is to provide a container equipped with such a heat-shrinkable tubular label.

  The heat-shrinkable tubular label according to the present invention is attached to the body of a container, and sandwiches a pair of first perforations extending from the upper end to the lower end and a pair of first perforations. And a pair of second perforations extending from at least one of the upper and lower ends of the heat-shrinkable tubular label toward the center of the heat-shrinkable tubular label. The pair of second perforations are respectively connected to the pair of first perforations located in the vicinity thereof. The angle between the second perforation and the first perforation is 45 ° or less, and the angle between the second perforation and the end of the heat-shrinkable tubular label is 45 to 155 °. In the following description, all values of distances and angles are values in the state of being attached to a container unless otherwise specified.

  According to the present invention, since the pair of second perforations are formed on both sides of the pair of perforations, the second perforation provides a trigger for a break. Further, the angle of the second perforation with the end of the heat-shrinkable tubular label (the end connected to the second perforation) is regulated to 45 to 155 °. Therefore, a break is given, and when the region between them is pinched with a finger and pulled toward the other end side, the break surely propagates to the second sewing machine.

  Further, the second perforation is connected to the first perforation, and the angle formed by the first perforation is restricted to 45 ° or less. For this reason, since the break generated at the second perforation surely propagates to the first perforation, the label can be easily peeled from the container.

  Here, "the second perforation is connected to the first perforation" means that the line connecting the holes of the first perforation and the line connecting the holes of the second perforation It means that they are connected or the shortest distance between both holes is 1.5 mm or less. The shortest distance is preferably 1.0 mm or less, more preferably 0.5 mm or less.

  The distance between the second perforations at the ends is preferably 10 to 20 mm. Such a width is suitable for being pinched and separated by fingers. The distance between the second perforations in the end portion is more preferably 12 to 18 mm, further preferably 14 to 16 mm.

  The angle formed by the second perforation and the first perforation is more preferably 45 ° or less, further preferably 40 ° or less. Further, the angle formed by the second perforation and the end of the heat-shrinkable tubular label is more preferably 45 to 155 °, and further preferably 40 to 150 °.

  It is preferable that the second perforation is easier to separate than the first perforation. Specifically, the second perforation pitch is smaller than the first perforation pitch. It is preferable that the eye hole is larger than the first perforation hole, or both of them are filled together.

  The size of perforations and the like will be described in more detail. In the first perforation, the diameter of the holes is preferably 0.2 to 0.7 mm, and the distance (pitch) between the holes is preferably 1.4 to 3.5 mm. In the second perforation, the diameter of the holes is preferably 0.3 to 1.0 mm, and the distance (pitch) between the holes is preferably 0.1 to 1.3 mm.

  Further, the heat-shrinkable tubular label may have a seamless tubular shape, or may have a structure in which the end portions of the base film are overlapped and the overlapping portion is bonded. In the case of the bonded structure, the first perforation and the second perforation may not all exist on the bonding portion, or a part of them may exist on the bonding portion. From the viewpoint of easiness of separation, it is preferable that the first perforation is formed with the adhesive portion sandwiched therebetween.

  The material for the heat-shrinkable tubular label may be any material as long as it has heat-shrinkability and is preferably one that can be bonded with a sealing solvent, but is not particularly limited. It is preferably formed of a polyester resin, a polystyrene resin, a polyolefin resin, or a laminate thereof.

  The container is preferably formed of a polyolefin resin or a polyester resin, but is not particularly limited.

  In addition, various known additives such as an ultraviolet absorber, an anti-blocking agent, a lubricant, an antistatic agent, an antibacterial agent, and a stabilizer, and different resins are purposely added to the material of the heat-shrinkable tubular label. May be.

  When the polyester film is used as the substrate film, the sealing solvent is preferably 1,3 dioxolane or tetrahydrofuran, and when the polystyrene film is used, tetrahydrofuran or methyl ethyl ketone is preferable.

  The labeled container of the present invention includes, for example, beverages such as tea, coffee, tea, water, soft drinks, carbonated drinks, juices and lactic acid bacteria beverages; sake such as sake and wine; liquid detergents; soy sauce, mirin, mentsuyu It can be used as a container for seasonings such as oil, cosmetics such as lotion and emulsion.

  The shape of the holes of the first and second perforations is preferably circular, but is not limited to this.

  A labeled container according to the present invention is one in which the heat-shrinkable tubular label described above is mounted on the body of the container.

  According to the present invention, when peeling is triggered by the second perforation at the time of peeling, the break surely propagates to the first perforation, and the heat shrinkable tubular label is applied with a small force. It can be removed from the container with.

(A) is a front perspective view of the heat-shrinkable tubular label according to Embodiment 1, and (b) is a front perspective view of a container to which the heat-shrinkable tubular label is attached. It is a figure explaining the arrangement relation of the perforation near the upper end of the heat-shrinkable tubular label concerning Embodiment 1. It is a figure which shows the modification of the 2nd perforation. It is a front perspective view of the heat-shrinkable cylindrical label which concerns on Embodiment 2. It is a front perspective view of the container in which the conventional heat-shrinkable cylindrical label was attached.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1A is a front perspective view of the heat-shrinkable tubular label according to the first embodiment, and FIG. 1B is a front perspective view of a container having the heat-shrinkable tubular label mounted thereon. The heat-shrinkable tubular label 1 according to the present embodiment includes a heat-shrinkable, tubular substrate film 3. The base film 3 has a tubular shape in which one end 3a thereof is superposed on the other end 3b, and the superposed portion is adhered (adhesive portion 15 is formed). The heat-shrinkable tubular label 1 is formed with a pair of first perforations 12 extending from the upper end to the lower end. Is formed with a pair of second perforations 13 extending toward the center side from at least one end (both upper and lower ends in FIG. 1). The pair of second perforations 13 is connected to the pair of first perforations 12.

  FIG. 2 is a diagram for explaining the arrangement relationship of perforations near the upper end of the heat-shrinkable tubular label according to the first embodiment. For convenience of description, in the same figure, perforations are represented as lines connecting holes. Here, the angle θ1 formed by the second perforation 13 and the first perforation 12 is 45 ° or less, and the angle θ2 formed by the second perforation 13 and the upper end line of the label is 45 to 155. °. Since θ2 is regulated in this way, it becomes easy to cut off the end portion of the second perforation 13 with a nail or the like to advance the cut. Then, since the second perforation 13 and the first perforation 12 are connected and θ1 is regulated in this way, the break generated at the second perforation 13 is surely the first perforation. The heat-shrinkable tubular label 1 can be easily peeled off from the container 2 after propagating to 12. When the perforation is a curve, the angle formed by the tangent line at the contact point may be within the above range.

  Further, it is preferable that the angle θ3 formed by the tangent line of the second perforation 13 and the end portion of the label is always 45 to 155 °. This makes it easy to advance the break along the second perforation 13 when the fingers are pinched between the cuts and pulled toward the other end. θ3 is preferably 45 to 155 °, more preferably 50 to 150 °, and further preferably 55 to 145 °. In addition, regarding θ2 and θ3, the first perforation side is 0 ° side, and the side opposite to the first perforation side is 180 ° side.

  This heat-shrinkable tubular label 1 is attached to the body of a container 2 such as a PET bottle, as shown in FIG. This is performed by mounting the heat-shrinkable tubular label 1 on the body of the container 2 and passing the mounted container through a shrink tunnel to cause heat shrinkage. The container may be filled with the contents before the heat-shrinkable label is attached to the container, or after the container is shrunk through the shrink tunnel.

  Here, the width L1 of the adhesive portion 15 is preferably 3 to 6 mm, more preferably 3 to 5 mm, and further preferably 3 to 4 mm, from the viewpoint of adhesive strength and cost.

  The distance L2 between the pair of first perforations 12 is preferably 8 to 15 mm, more preferably 9 to 14 mm, and further preferably 10 to 13 mm.

  Further, the distance L3 between the pair of second perforations 13 is preferably 10 to 20 mm, more preferably 12 to 18 mm, from the viewpoint of easiness of pinching with a finger, easiness of making a break, and the like. , 14 to 16 mm is more preferable.

  Further, the distance L4 between the first perforation 12 and the welded portion is preferably 2 to 6 mm, more preferably 2 to 5 mm, and further preferably 2 to 4 mm.

  The distance L5 between the first perforation 12 and the second perforation 13 at the upper end is preferably 1 to 3 mm, more preferably 1.5 to 2.5 mm, and 1.5 It is even more preferable that the thickness is ˜2.0 mm.

  The distance L6 from the upper end to the confluence of the first perforation 12 and the second perforation 13 is preferably 5 to 10 mm, more preferably 6 to 9 mm, and 6 to 8 mm. It is more preferable that there is. Further, L6 is preferably 20% or less of the length of the label, more preferably 15% or less, and further preferably 10% or less.

  According to the present invention, when the second perforation 13 gives the opportunity for the break, the second perforation 13 and the first perforation 12 are connected, and the angle formed is 45 ° or less. The cuts reliably propagate to the first perforations 12 so that the heat-shrinkable tubular label 1 can be easily peeled off from the container 2.

  On the other hand, the vertical length L6 of the second perforation 13 is within the above range, and even if the central portion of the container 2 swells due to the impact at the time of dropping, the second perforation 13 is destroyed by the force. There is no such thing.

(Modification)
FIG. 3 is a diagram showing a modification of the arrangement relation of perforations. The second perforations 13 may be linearly connected from the upper end of the label to the first perforations 12 as shown in FIG. Further, it may have a curved shape as shown in FIG. 3 (b), or may have a shape in which a curved line and a straight line are combined as shown in FIGS. 3 (c) and 3 (d). Further, as shown in FIG. 3D, the second perforation 13 may be farther from the first perforation 12 near the upper end.

  The shape of the second perforation 13 (the shape of the line connecting the holes) may be left-right symmetric or left-right asymmetric, but is preferably left-right symmetric from the viewpoint of easy separation. When the second perforations are provided at both the upper and lower ends, the shape of the second perforations 13 (the shape of the line connecting the holes) may be vertically symmetrical or vertically asymmetric.

(Embodiment 2)
FIG. 4 is a front perspective view of the container having the heat-shrinkable tubular shape according to the second embodiment. The heat-shrinkable tubular label 1 according to the present embodiment is the same as that of the above-mentioned first embodiment except that it covers even the shoulder portion of the container. In such a case, the upper end of the heat-shrinkable tubular label 1 is present on the shoulder portion of the container 2 whose diameter is gradually changing, and the first perforation 12 and the second perforation 13 are on the same plane in the vicinity thereof. There may be possibilities not above.

  In such a case, with respect to the tangent plane at the intermediate point of the first perforations 12 at the upper end portion of the heat-shrinkable tubular label 1, the projection view projected from the direction perpendicular to the tangent plane, The angle formed by the first perforation 12 and the second perforation 13 is the angle between them. When one or both of them are curved, it is defined as the angle formed by the tangent line at the contact point. Further, the angle formed by the upper end of the heat-shrinkable tubular label 1 and the second perforation 13 is also the angle in the above projection view. Further, even when the lower side of the heat-shrinkable tubular label 1 is formed so as to cover a part of the bottom of the container, the angle is defined in the same manner as above.

(Example 1)
As the heat-shrinkable base film, "HST" type manufactured by Gunze Co. was prepared. One end of this film was overlaid on the other end, and the overlaid portion was bonded using a sealing solvent. The width of this bonded portion is 4 mm.

  A linear first perforation was formed by a perforation blade at a position of 3 mm on the outer right side and 5 mm on the left side of the adhesive portion. Further, a second perforation having a shape as shown in FIG. 2 was formed on the upper end of the label by laser. At this time (before contraction), θ2 was 90 °, L6 was 7 mm, and L5 was 1.5 mm. Further, the length of the portion of the second perforation parallel to the first perforation was 3.5 mm. Further, the shape of the holes of the first perforations was a circle having a diameter of 0.5 mm, and the interval between them was 1.5 mm. The shape of the holes of the second perforations was a circle having a diameter of 0.6 mm, and the interval between them was 0.8 mm.

  A Nichiban tape having a width of 0.8 mm and a length of 30 mm was attached to a region between the pair of first perforations. After that, the container was attached to the body of a container made of polyethylene terephthalate, and the attached container was passed through a shrink tunnel at 85 ° C. to be heat-shrinked to produce a labeled container according to Example 1. The average shrinkage at this time is 10%, L3 after shrinkage is 16 mm, θ1 is 30 °, and θ2 is 90 °.

(Example 2)
A labeled container according to Example 2 was produced in the same manner as in Example 1 except that the shape of the second perforations was as shown in FIG. 3 (a). L5 at the time of label production is 1.5 mm, and L6 is 7 mm. L3 after contraction is 16 mm, θ1 is 30 °, and θ2 is 90 °.

(Example 3)
A labeled container according to Example 3 was produced in the same manner as in Example 1 except that the distance L5 between the second perforation and the first perforation during label production was 3.0 mm. L3 after contraction is 19 mm, θ1 is 40 °, and θ2 is 90 °.

(Example 4)
A labeled container according to Example 4 was produced in the same manner as in Example 2 except that the distance L5 between the second perforation and the first perforation was 3.0 mm. L3 after contraction is 19 mm, θ1 is 40 °, and θ2 is 90 °.

(Comparative Example 1)
A labeled container according to Example 2 was produced in the same manner as in Example 1 except that the shape of the second perforation was as shown in FIG. L5 at the time of label production is 1.5 mm, and L6 is 7 mm.

(Comparative example 2)
A labeled container according to Comparative Example 2 was produced in the same manner as in Comparative Example 1 except that the distance L5 between the second perforation and the first perforation was 3.0 mm.

(Peeling test)
Using an AIKOH push-pull gauge RX-20, the tapes attached to the labels of Examples 1 to 4 and Comparative Examples 1 and 2 were picked up and the area between the perforations was peeled off from the second perforation. The force at which the break transitioned to the first perforation was measured. In addition, the number that did not transfer to the second perforation was also measured. The results are shown in Table 1 below.

  From Table 1 above, in the example, the breaks are surely transferred from the second perforation to the first perforation, whereas in Comparative Examples 1 and 2, 2 out of 10 samples and 4 out of 10 samples, respectively. It can be seen that the transition to the perforation is not made. Those that did not have breaks were not included in the population of the test results.

  Further, from Examples 1 to 4, when L5 between the first perforation and the second perforation at the upper end portion after contraction increases, the force required for peeling increases, and the shape of the perforation is as shown in FIG. It can be seen that the force required for peeling is smaller than that in FIG.

  From the above, it can be seen that by providing the second perforation connected to the first perforation as in the present invention, reliable separation can be performed with a small force.

  It should be considered that the embodiments disclosed herein are illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

  According to the present invention, a shrinkable tubular label that can be opened with less force is obtained, and its industrial significance is great.

DESCRIPTION OF SYMBOLS 1 Heat-shrinkable tubular label 2 Container 3 Base film 3a One end 3b The other end 12 First perforation 13 Second perforation 15 Adhesive part

Claims (3)

In the heat-shrinkable tubular label attached to the body of the container,
The heat-shrinkable tubular label has a pair of first perforations extending from the upper end to the lower end,
A pair of second perforations that are provided on both sides of the pair of first perforations and that extend from at least one of the upper and lower ends of the heat-shrinkable tubular label toward the center side. ,
The pair of second perforations is connected to the pair of first perforations located in the vicinity thereof,
The angle formed by the second perforation and the first perforation in the state of being attached to the container is 45 ° or less, and the end of the second perforation and the heat-shrinkable tubular label A heat-shrinkable tubular label having an angle of 45 to 155 °. The distance between the second perforations at the end is 10 to 20 mm,
The heat-shrinkable tubular label according to claim 1, wherein   A labeled container in which the heat-shrinkable tubular label according to claim 1 or 2 is mounted.

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