JP2006347598A - Shrink film, and container with the shrink film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink film with a tab which film offers a shrink label that becomes the only piece of trash when peeled off, and that can be torn easily along a perforation, and to provide a container to which the shrink film is attached. <P>SOLUTION: The shrink film is made of a heat shrinking synthetic resin, and covers either or both of the trunk and shoulder of a container body. The perforation dotted linearly with holes is formed on the shrink film to extend from its upper end to its lower end in parallel with the major axis of the container body. Along the perforation used as the center line, a pair of adjacent tabs are formed on at least the edge of either upper end or lower end, where a V-shaped incision is made between the tabs. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shrink film used as a product display member such as a label of a packaging container such as a plastic container, and a container with a shrink film to which the shrink film is attached, and particularly, the shrink label attached to the container body is easily peeled off. It relates to the peeling technology that is possible.

  In one-way containers such as packaging containers, especially cans, merchandise is displayed by label printing. However, even in the case of a one-way container, in a container having an uneven surface such as a plastic container, it may be difficult to print on the surface of the body or shoulder of the container.

  Therefore, so-called shrink labels are used. A shrink label is a product that is pre-printed on a synthetic resin film that heat-shrinks when heated, and the film is formed into a cylindrical shape. It is a label that can be wound along the shape of the container main body by heating with, for example. According to this shrink label, it is possible to display a good-looking product even on a container having an uneven surface such as a plastic container.

  In recent years, separation of containers and shrink labels is required as containers are recycled. Therefore, a technique is disclosed in which a perforation is provided in the shrink label so that the consumer can easily separate the shrink label and the container when the container is discarded (see, for example, Patent Documents 1, 2, or 3).

  In the technique described in Patent Document 1, a tape or a thread that runs across the upper and lower ends of the label is provided, and at least one of the upper end and the lower end of the label at a position near the tape or thread. Incisions or fine holes are provided.

  In the technique described in Patent Document 2, the cut line of the label has a bank-like thick portion extending on both sides along a perforation that is a row of holes dotted linearly in the vertical direction of the tube. At the same time, a thick part that is thinner than the wall thickness of the bank-like thick part and thicker than the original thickness of the film is formed between the holes.

In the technique described in Patent Document 3, the cylindrical member made of a shrink film is cut off in the axial direction at the leading edge in the axial direction in a state before shrinkage, and a pair of axial members are directed rearward from the leading edge of the cylindrical member. A break line is provided, and a notch of a predetermined length is provided from the front edge of the tubular member to the rear at the distal end of the break line, and the tubular member is attached to the packaging container and contracted. In this case, the notch of the pair of break lines is opened, and a knob portion is formed between the notches.
Japanese Utility Model Publication No. 5-22346 JP 2002-337880 A JP 2002-225933 A

  However, in the technique described in Patent Document 1, the peeled shrink label and the tape or thread are separated, and at least two dusts are generated. Further, in the technique described in Patent Document 2, since there is no knob when peeling off, it is necessary to hook and peel off the nail, which is difficult to peel off. Furthermore, in the technique of Patent Document 3, the notch is formed by opening at the time of contraction, so it is very small and difficult to peel off. In addition, as in Patent Document 1, at least two dusts are generated in a portion surrounded by a shrink label and a pair of break lines.

  The present invention provides a shrink film with a knob, which is one of the peeled shrink labels, and can be easily cut along the perforations when the shrink labels are peeled off. With the goal. Moreover, it aims at providing the container equipped with the shrink film.

In order to solve the above-mentioned problems, the shrink film according to the present invention is made of a synthetic resin that shrinks when heated, and is a shrink film that covers the trunk or shoulder of the container body or both the trunk and shoulder. ,
From the upper end to the lower end of the shrink film, a perforation in which holes are dotted in a line in parallel to the main axis of the container body is provided,
With the perforation as a center line, a pair of adjacent knobs are provided at the edge of at least one of the upper end or the lower end,
A V-shaped cut is provided between the knobs.

  In the shrink film which concerns on this invention, it is preferable that the said notch is a shape which makes the said perforation a symmetrical line. When tearing with a knob, force is applied evenly and it is easy to cut along the perforation.

  In the shrink film which concerns on this invention, it is preferable that the angle which the said notch and the extension line of the said perforation make is 10 degrees-60 degrees on either side. Both of the paired knobs are easy to pick.

  In the shrink film which concerns on this invention, it is preferable that the opening angle of the V character of the said cut shall be 20 degrees-120 degrees. Both of the paired knobs are easy to pick.

  The container with a shrink film according to the present invention is characterized in that the shrink film according to the present invention is mounted.

  In the present invention, when the shrink label is peeled off, it is one peeled shrink label that becomes dust, and the shrink label can be easily cut along the perforation.

  Hereinafter, although an embodiment is shown and the present invention is explained in detail, the present invention is limited to these descriptions and is not interpreted.

  FIG. 1 is a schematic view when the shrink film according to the present embodiment is mounted on a container body. FIG. 2 is an enlarged schematic view of a portion A in FIG. The shrink film 1 shown in FIG. 1 is made of a synthetic resin that shrinks when heated, and is a shrink film that covers the container main body 100 from the trunk to the shoulder, from the upper end 4 to the lower end 5 of the shrink film 1, A perforation 2 in which holes are dotted in a line in parallel with the main axis X of the container body 100 is provided, and a pair of adjacent knobs 3 are provided at the edge of the upper end 4 with the perforation 2 as a center line. A V-shaped notch 6 is provided between 3a and 3b.

  As the synthetic resin that shrinks when heated, for example, a conventionally used polypropylene film, polyester film, or polystyrene film can be used.

  As the container, a shrink film is often applied to a one-way container having an uneven surface. However, the container is not limited to this and may have a smooth surface. Specifically, it can be used for plastic containers, glass bottles or bottle-shaped cans.

  The shrink film 1 shown in FIG. 1 covers both the trunk and the shoulder by covering the container main body 100 from the trunk to the shoulder, but the coating location is not limited to this, and the shrink covering the trunk is performed. It may be a shrink film covering the film or shoulder. Which part of the container body 100 is to be covered is appropriately determined by the label design.

  The perforation 2 is provided from the upper end 4 to the lower end 5 of the shrink film 1. The perforation 2 is formed by interspersing holes linearly in parallel with the main axis X of the container body 100 so that the perforation 2 can be easily cut along the perforation. The shape of the hole is not particularly limited, and may be any one of a circular hole, a linear cut edge, and a rectangular hole. The size of the hole is preferably about 0.3 to 2 mm if it is a circular hole. Moreover, if it is a rectangular hole or a linear cut end, the length of a longitudinal direction is preferable about 2-5 mm. The interval between the holes may be moderately opened as long as they can be cut while being chained starting from each other one after another, but if the interval is too small, the strength of the film is weakened. Therefore, the interval is preferably about 2 to 5 mm. The hole can be produced by laser irradiation or mechanical punching. In the present embodiment, the hole is not limited by the hole forming method.

  The knob 3 is provided in order to make it easy to pinch a location that becomes a starting point when the shrink film 1 is cut along the perforation 2. Therefore, the place where the knob 3 is provided is preferably the portion A in FIG. 1 which is the intersection of the edge of the upper end 4 of the shrink film 1 and the perforation 2. In FIG. 1, the knob 3 is provided at the edge of the upper end 4 of the shrink film 1, but may be provided at the edge of the lower end 5 of the shrink film 1. Alternatively, the shrink film 1 may be provided on both the edge of the upper end 4 and the edge of the lower end 5.

  The knobs 3 are provided as a pair (knobs 3a and 3b) adjacent to each other with the perforation 2 as the center line. By providing the pair of knobs 3a and 3b, the perforation 2 can be opened simultaneously from both sides, and the shrink film 1 can be cut along the perforation 2. Further, in order to make it easy to simultaneously hold the pair of knobs 3a and 3b, a V-shaped notch 6 is provided between the knobs 3a and 3b.

  It is preferable that the notch 6 has a shape in which the perforation 2 is a symmetric line. That is, as shown in FIG. 2, the angle formed between the left side edge of the cut 6 and the extension line Y of the perforation 2 is defined as θ1, and the angle formed between the right side edge of the cut 6 and the extension line Y of the perforation 2 is defined as θ2. Then, it is preferable that the shape satisfies the relationship θ1 = θ2. Note that the main axis X of the container main body 100 in FIG. 1 and the extension line Y of the perforation 2 are in a parallel relationship. By making the perforation 2 a symmetric line, a stable design can be achieved, and a tearing force along the perforation 2 can be easily transmitted.

  In addition, in this embodiment, the incision as shown in FIG. 3 or FIG. 4 is also included. FIG. 3 or FIG. 4 is a schematic view showing another form of cutting. The form of FIG. 3 is an example in which the cuts 6 are provided so as to have a relationship of θ1 <θ2. Of course, the notch 6 may be provided so as to have a relationship of θ1> θ2 (not shown). The form of FIG. 4 is an example in which the notch 6 is provided so as to have a relationship of θ1 = 0 ° and θ1 <θ2. Of course, the notch 6 may be provided so as to have a relationship of θ2 = 0 ° and θ1> θ2 (not shown).

  In the shrink film 1 according to the present embodiment, it is preferable that the angles θ1 and θ2 formed by the notch 6 and the extension line Y of the perforation 2 are 10 ° to 60 ° for the left (θ1) and the right (θ2), respectively. Furthermore, it is more preferable to set it as 30 degrees-45 degrees. When satisfying such an angle, both the knobs 3a and 3b are easily held. When θ1 and θ2 are less than 10 °, the knob must be raised by hooking only the upper edge of the knob 3 with a nail. When the adhesion between the shrink film 1 and the container body 100 is good, the knob 3 is It may be difficult to pinch. When θ1 and θ2 exceed 60 °, the size of the knob 3 itself becomes small and it may be difficult to pick.

  Moreover, in the shrink film 1 which concerns on this embodiment, it is preferable that the opening angle (theta) of V character of the notch 6 shall be 20 degrees-120 degrees. Furthermore, it is more preferable to set it as 60 degrees-90 degrees. Here, the relationship θ = θ1 + θ2 is established. When satisfying such an angle, both the knobs 3a and 3b are easily held. When the opening angle θ of the V letter is less than 20 °, the knob must be raised by hooking only the upper edge of the knob 3 with a nail, and when the shrink film 1 and the container body 100 are in close contact, etc. The knob 3 may be difficult to pick. When the opening angle θ of the V letter exceeds 120 °, the size of the knob 3 itself becomes small, and it may be difficult to pick.

  Therefore, in the shrink film 1 according to the present embodiment, the angles θ1 and θ2 formed by the notch 6 and the extension line Y of the perforation 2 are 10 ° to 60 ° for the left (θ1) and the right (θ2), respectively, and the notch The opening angle θ of the V letter 6 is more preferably 20 ° to 120 °. Furthermore, it is particularly preferable to satisfy θ1 = θ2.

  The right and left edges of the shrink film 1 according to the present embodiment are bonded to each other by adhesion such as heat fusion to form a cylinder. After the container body 100 is coated, the shrink film 1 is contracted by heating the shrink film 1 with hot air or the like. Then, the shrink film 1 is finally wound around the surface of the container body 100 in a close contact state while being limited by the shape of the container body 100. By doing in this way, the container with a shrink film which attached the shrink film which concerns on this embodiment can be produced.

  The shrink film 1 is printed with a label before being attached to the container body 100.

  With respect to the V-shaped cut 6, a sensory evaluation test was conducted on the ease of holding the knob 3 when θ, which is the opening angle of the V character, was changed. The shape of the knob 3 was the shape shown in FIG. 2, and the notch 6 was a shape having the perforation 2 as a symmetric line. That is, θ = θ1 + θ2 and θ1 = θ2. The container was a polyethylene terephthalate (PET) beverage container, and the shrink film 1 was a PET sheet.

  There are three sensory evaluators, sample 1 is θ = 170 ° (θ1 = θ2 = 85 °), sample 2 is θ = 150 ° (θ1 = θ2 = 75 °), sample 3 is θ = 120 ° (θ1 = θ2 = 60 °), sample 4 is θ = 90 ° (θ1 = θ2 = 45 °), sample 5 is θ = 60 ° (θ1 = θ2 = 30 °), sample 6 is θ = 20 ° (θ1 = θ2 = 10 °), sample 7 is θ = 0 ° (θ1 = θ2 = 0 °), and each of the five is easy to hold, that is, easy to peel in three stages (easy to hold, normal, hard to hold) evaluated. The results are shown in Table 1. The notation of “n / 5” in the table means that the corresponding number of 5 is n.

  Examining the results in Table 1, when θ is 20 ° to 120 ° (10 ° ≦ θ1 = θ2 ≦ 60 °), the number of “easy to hold” or “normal” is “not easy to hold”. Since it is larger than the number, it can be said that θ is a preferable range. Further, when θ is 60 ° to 90 ° (30 ° ≦ θ1 = θ2 ≦ 45 °), almost all of the knobs are judged to be “easy to hold”, and θ is found to be a more preferable angle. . On the other hand, when θ = 0 °, the V character shape is not cut, making it difficult to hold the knob. Further, even when θ = 170 ° and 150 °, it is difficult to hold, and the necessity of increasing the size of the knob arises.

It is the schematic when the shrink film which concerns on this embodiment is mounted | worn with the container main body. FIG. 2 is an enlarged schematic view of a part A in FIG. 1. It is the schematic which shows the other form of a notch | incision. It is the schematic which shows the other form of a notch | incision.

1, shrink film 2, perforation 3, pair of knobs 3a, 3b, knob 4, upper end of shrink film 5, lower end of shrink film 6, notch X, main axis Y of container body, perforation extension line 100, container body

Claims (5)

In the shrink film that consists of a synthetic resin that shrinks when heated, and covers the trunk or shoulder of the container body or both the trunk and shoulder,
From the upper end to the lower end of the shrink film, a perforation in which holes are dotted in a line in parallel to the main axis of the container body is provided,
With the perforation as a center line, a pair of adjacent knobs are provided at the edge of at least one of the upper end or the lower end,
A shrink film having a V-shaped cut formed between the knobs.   The shrink film according to claim 1, wherein the cut has a shape in which the perforation is a symmetric line.   The shrink film according to claim 1 or 2, wherein an angle formed by the cut and an extension line of the perforation is set to 10 ° to 60 ° on each of the left and right sides.   The shrink film according to claim 1, 2, or 3, wherein an opening angle of the V-shaped cut is 20 ° to 120 °. A shrink film-equipped container, wherein the shrink film according to claim 1 is installed.

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