JPH11165761A - Shrink package of gable-top container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove an outer shrink film by providing unsealing holes on at least the shrink film covering a space formed on a side upper part of a gable-top container in a package with the gable-top container packaged by the shrink film. SOLUTION: When a gable-top container 2 preferably used in packaging refined sake, milk or the like is to be packaged by a shrinkable film, that is a thermoplastic film 3, unsealing holes 31 are formed in a line on the film 3. The unsealing holes 31 are provided entirely on the film 3, or as shown in the figure, they are intermittently provided from a bottom to an upper part on a side face 21 of the container 2. In order to inform a consumer that the shrink package 1 has an unsealing means on the film 3 covering a space 22, print 32 indicating a position to be unsealed may be applied on a side of the unsealing holes 31 of the film 3. By this providing the unsealing holes 31, the film 3 can be easily broken for removal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrinkable package of a gable-top type container, which is often used for packaging sake, milk and the like, and further packaged with a shrink film.

[0002] The gable-top type container refers to a container in which a rectangular composite paper material is bent into a quadrangular prism shape, the bottom portion is flattened, and the upper portion is gabled (see FIG. 1).

[0003]

2. Description of the Related Art In recent years, liquids such as sake and milk have been used for reasons such as easy disposal, high strength and light weight, and bulkiness and easy transportation before filling the contents. Has often been filled into gable-top composite paper containers. Further, the container is shrink-wrapped for the purpose of preventing dust from adhering or being unnecessarily opened before the product reaches the consumer.

However, since the shrink film is generally formed by stretching, it has a high tensile strength, and the work of breaking by hand requires a considerable force. In particular, the shrink wrapper of the gable-top type container cannot be pinched and broken because the film is in close contact with the container,
Often, separate members such as protrusions and blades were required.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a shrink package for a gable-top type container, from which an outer shrink film can be easily removed.

[0006]

According to the present invention, as a means for solving the above-mentioned problems, a gable-top-type container is formed at least at an upper part of a side surface of the gable-top-type container in a package body wrapped with a shrink film. The shrink film covering the space is provided with a shrink wrapper of a gable-top type container provided with an opening hole, and the opening hole extends from the bottom to the top of the side surface of the gable-top type container. A shrink wrapper for the gable-top type container, wherein the shrink wrapper is provided intermittently until the opening of the shrink film is printed around the opening. A shrink wrapper for the gable-top type container is provided, further comprising: Shrink packaging of the gable-top type container is provided, characterized in that provided by the heated instrument above.

That is, when a shrink film provided with an opening is used and the opening is covered so as to cover the space formed in the upper part of the gable-top type container, the space is opened simply by pressing the space from outside with a finger. The inventors have found that the shrink film is torn from the hole and the shrink film can be easily removed, and the present invention has been achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shrink wrapper of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating an example of the shrink package of the present invention. The thermoplastic film 3 used in the present invention can be used without any particular limitation as long as it is a film usually used for shrink wrapping. For example, a low density polyethylene resin, a high density polyethylene resin, a linear low density polyethylene resin, etc. One type of polyethylene resin, polypropylene resin, polyethylene terephthalate resin, or a single-layer or multilayer film composed of a plurality of types, a tubular stretching method,
Stretched using a known method such as a tenter stretching method and a roll stretching method can be used.

Further, the shrink film 3 according to the present invention
Is provided with an opening hole 31. The opening hole 31 may be provided on the entire surface of the shrink film 3 or only on a portion covering the space portion 22. However, as shown in FIG. 1, the opening hole 31 is provided intermittently from the bottom to the top of the side surface 21 of the gable-top type container 2. May be. In the case where the opening hole 31 is provided only in the portion covering the space 22, it is necessary to know to a certain extent which part of the shrink film 3 covers the space 22. If the container 2 is provided intermittently from the bottom to the top, the object of the present invention can be achieved even if the position is slightly shifted when the container 2 is placed on the film 3.

Further, for the purpose of informing the consumer that the shrink wrapping body 1 of the present invention has the opening means in the film covering the space 22, as shown in FIG. Print 3 showing opening position next to 31
2 may be applied. The print 32 may be a character display such as "opening opening", or may be a pattern such as an arrow as shown in FIG.

When shrink wrapping is usually performed, the shrink film 3 is provided with a hole for bleeding air. However, the opening hole 31 in the present invention is intended for opening, and the hole for bleeding air is basically the same as the hole for bleeding air. Differently. For example,
It is preferable that the hole for bleeding air is not known to the consumer, and the smaller the diameter, the better. On the other hand, the opening hole 31 of the present invention is large enough to be a motive for opening, Must be large enough to visually confirm their presence. Although the size of the opening hole 31 is not particularly limited, the diameter of the hole for deflating air before contraction is generally 0.05 to 0.2 mm, whereas the opening hole 31 of the present invention is substantially In the case of a circular shape, the diameter before shrinkage is usually about 0.3 to 10.0 mm, preferably 0.7 to 5.0 mm.
mm, more preferably 1.5 to 3.0 mm.

Next, a method for manufacturing the shrink package 1 of the gable-top type container of the present invention will be described. The shrink wrapper 1 of the gable-top type container of the present invention can be manufactured by substantially the same method as the ordinary shrink wrapper 1 except that the opening 31 is provided. The timing at which the opening hole 31 is provided is not particularly limited as long as it is between the time when the film is formed and the time when the gable-top type container is shrink-wrapped, and may be the time when the film is cut to a desired width. Alternatively, it may be immediately before shrink-wrapping the gable-top type container 2. In addition, the shape of the opening hole 31 is not particularly limited, and may be circular, elliptical, or linear, which is a so-called perforation. If the processing tool is used at room temperature, the strength of the peripheral portion of the opening 31 becomes weak, and the film may be broken at the time of performing the punching process or at the stage of distribution. Therefore, the present inventors propose as a method of manufacturing the shrink wrapping body 1 a method of providing the opening hole 31 using an instrument heated to a temperature higher than the melting point of the film. In this case, as shown in FIG. 3, the molten resin accumulates around the opening hole 31 and has an appropriate strength.

[0013]

Next, the method for producing a shrink package according to the present invention will be described in more detail with reference to an example, but the present invention is not limited to this. First, a polypropylene resin is formed into a film by an inflation extrusion molding method, and the film is stretched by a tubular biaxial stretching method to obtain a shrink film 3 having a thickness of 15 μm. Next, the shrink film 3
Is cut to a width of 43 cm, and opening holes 31 are opened at 1 cm intervals in the length direction of the film 3 at 11 cm from the right end and 11 cm from the left end of the film 3 with a needle having a diameter of 1 mm heated to 200 degrees. . Further, the obtained film 3 is set on a shrink wrapping machine, and the gable-top type container 2 is shrink-wrapped. At this time, as shown in FIG. 4, the gable-top type container is placed on the shrink film so that the length direction of the container 2 and the length direction of the film 3 overlap and the spout portion 23 faces upward. After that, the film may be sealed and cut in accordance with the size of the container, and may be heated and shrunk in a dish, similarly to the shrink wrapping of a normal gable-top type container. When the space portion 22 of the obtained shrink package was pressed with a finger, the outer film was easily torn.

[0014]

According to the shrink package of the present invention, since the shrink film covering the space of the container is provided with an opening hole, when the space is pushed from the outside, the outer film is easily broken and removed. Can be. In particular, when the opening is provided intermittently from the bottom to the top of the side of the container, when packaging the gable-top type container, it is not necessary to accurately grasp the relationship between the container and the film, and the packaging is not necessary. It's easy. Furthermore, if the print indicating the opening position is provided in the vicinity of the opening hole, the consumer can surely know the opening position of the shrink package according to the present invention. Furthermore, when the opening hole is processed by a heated instrument, molten resin accumulates around the opening hole, and the strength of the opening hole becomes appropriate.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an example of a shrink package of a gable-top type container according to the present invention.

FIG. 2 is a perspective view illustrating an example of a shrink film used in the present invention.

FIGS. 3A and 3B are a plan view illustrating an example of a shrink film used in the present invention and a cross-sectional view taken along line aa ′ of FIG.
It is.

FIG. 4 is a perspective view illustrating one step of manufacturing a shrink package of a gable-top type container according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shrink package of gable-top type container 2 Gable-top type container 21 Side surface 22 Space part 23 Spout 3 Shrink film 31 Opening hole 32 Printing

Claims (4)

[Claims] 1. A space formed in at least an upper portion of a side surface of a gable-top type container in a package in which the gable-top type container is packaged with a shrink film.
A shrink wrapper 1 for a gable-top type container, wherein an opening 31 is provided in a shrink film 3 covering the shrink film 2. 2. A shrink wrapper for a gable-top type container according to claim 1, wherein said opening hole is provided intermittently from the bottom to the upper part of the side surface of the gable-top type container. One. 3. A shrinkable gable-top type container according to claim 1, wherein a print 32 indicating an unsealing position is formed around the unsealing hole 31 of the shrink film 3. Package 1. 4. The shrink wrapper 1 for a gable-top type container according to claim 1, wherein the opening 31 is provided by an instrument heated to a temperature higher than the melting point of the film.