JP2001180622A - Container packaging method and package body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container packaging method wherewith a label can be prevented from coming off accidentally from a container while being easily unsealable and a package body can be produced easily at a low cost, and also to provide the package body made up therewith. SOLUTION: For the container packaging method wherewith a hoop-shaped label is attached around a container composed of a container main body and a cover to be fitted to the container main body, a heat-shrinkable film in a belt-like shape set in a width for partly covering the periphery of the container is formed into the hoop-shaped label, and the hoop-shaped label is stuck to the container main body with a heat-sensitive adhesive applied to the heat- shrinkable film activated by a heat of heat shrinkage when the hoop-shaped label attached around the container is shrunk by heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a package for packaging containers, and more particularly to a method and a package for packaging food containers such as lunch containers displayed at stores such as convenience stores.

[0002]

2. Description of the Related Art Conventionally, for example, packages such as lunch containers and prepared food containers displayed at stores such as convenience stores are
With a stretch film that has almost no shrinkage,
There is one in which the entire surface is covered and sealed so that the container body and the lid do not separate (conventional example 1). Also,
As another package, there has been a configuration in which a part of the periphery of a container is wound with a belt-shaped unshrinkable film or paper sheet (conventional example 2).

[0003]

The package of the prior art 1 has the drawback that the material cost of the film is high because the whole container is wrapped, and the time and effort for opening the film by breaking the film or the like is also high. It was troublesome. . Further, in the packaging form of Conventional Example 2, since the cylindrical label is simply fitted on the container, there is a possibility that the label may be accidentally removed from the container.

Accordingly, the present invention has been made to solve the above-mentioned problem, and it is intended to prevent a label from being accidentally detached from a container, and to make it easy to open the label. It is an object to provide a packaging method and a package.

[0005]

SUMMARY OF THE INVENTION The present invention has been made as a method and a package for packaging a container in order to solve the above-mentioned problems, and the features of the method for packaging a container are as follows. A container packaging method for mounting a cylindrical label around a container comprising a lid to be combined, wherein the band-shaped heat-shrinkable film is set to a width covering a part of the container periphery. When heat shrinking the cylindrical label fitted in the container, the heat at the time of heat shrinkage activates the heat-sensitive adhesive applied to the heat shrinkable film to form the cylindrical label. It consists in adhering a label to said container body.

[0006] By heating the cylindrical label fitted to the container, the shrinking step of the label and the bonding step of bonding the label to the container can be performed at the same time, and the package can be easily and quickly manufactured. Since the label of the package produced by this method is adhered to the container with an adhesive, it does not come off accidentally. Also, since the cylindrical label is adhered only on the container body side, the external fitting on the lid side is beautiful.

A method for packaging a container, comprising attaching a cylindrical label around a container comprising a container body and a lid fitted to the container body, wherein the width is set so as to cover a part of the periphery of the container. The ends of a pair of heat-shrinkable long films wound and rolled together are adhered to each other, and the container is transported so as to pay out both long films. To form a cylindrical label by welding and cutting, and when the label fitted to the container is thermally contracted, the heat applied during the thermal contraction was applied to the film covering the container body side. The act of activating the thermal adhesive to adhere the label to the container.

Then, while feeding out the long film,
The package can be manufactured continuously, and the label of the package manufactured by this method is adhered to the container with an adhesive, so that it does not accidentally come off. Moreover, since only the container body side is adhered, the appearance of the lid side is beautiful.

[0009] A feature of the package is a package in which a cylindrical label is mounted around a container comprising a container body and a lid fitted to the container body, wherein the label is a container. A heat-shrinkable film having a width set to cover a part of the periphery is formed in a cylindrical shape, and the heat-shrinkable label is adhered to the container body with an adhesive.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. A package 1 of the present embodiment is wound around a container 3 containing, for example, a food and a container 3 so that a part of the container 3 is exposed. And the label 5 of the strip.

The container 3 includes a container body 6 having a substantially rectangular shape in a plan view, and a lid 7 detachably fitted to the container body 6.
Consists of The container body 6 and the lid 7 are appropriately formed from a plastic sheet or a sheet made of paper, but are preferably formed from a plastic sheet. Container body 6
The material of the lid 7 is not particularly limited, but is a sheet excellent in gloss, transparency and heat resistance, for example, a thickness of 0.2 to 2.0 mm made of a polystyrene (PS) resin.
It is preferable to form the sheet from the above sheet by a known means such as vacuum forming or pressure forming.

The label 5 is formed by forming a band-shaped heat-shrinkable film (shrink film) into a tubular shape, and its width L1 is smaller than the length (length in the same direction as the band width) L2 of the container 3. It is attached by heat shrink so as to be located substantially at the center of the container 3. Specifically, the relationship between the label width L1 and the length L2 of the container 3 is preferably set to a relationship of 2L1 ≦ L2. The length L2 of the container 3 is, for example,
When the container 3 is tapered so that the diameter decreases downward, it refers to the minimum length.

The label 5 is preferably made of the same material as that of the container 3, particularly preferably a uniaxially stretched polystyrene film (OPS shrink film) stretched in the longitudinal direction of the label. In addition, on the surface of the label 5, a display 16 such as a product name is printed as appropriate.

A heat-sensitive adhesive 10 as an adhesive is applied to a portion (a part of the label) 5a located on the inner surface of the label 5 and on the bottom surface of the container body 6. The heat-sensitive adhesive 10 is activated by heat when the label 5 fitted on the container 3 is thermally shrunk, and can adhere the label 5 to the container 3. As the heat-sensitive adhesive, there can be used a delayed tack adhesive in which the solid plasticizer is melted by heating and thereafter the tackiness is maintained, or a heat sealant made of a heat-adhesive resin such as an ethylene-vinyl acetate copolymer.

An opening perforation 17 is formed in a portion 5b of the label 5 located on the side surface of the container 3, so that the label 5 can be easily broken by the perforation 17.

Next, FIG. 2 shows a method of manufacturing the package.
Will be described with reference to FIG. First, as shown in FIG. 1A, a pair of heat-shrinkable long films 13 and 14 wound in a pair of rolls are set in a packaging machine (not shown) so as to be able to be fed out. The container 3 is made of, for example, a transparent expanded polystyrene (OPS) formed on a container body 6 molded from a PS sheet.
The cover 7 is formed by fitting a cover 7 formed by pressure-forming a sheet, and stores food as an object to be stored, for example.

Each of the long films 13 and 14 is made of a transparent OPS shrink film stretched in the longitudinal direction. Further, the heat-sensitive adhesive 10 is applied to one surface (the surface on the inside of the label) of one of the long films 13 (the container body side, particularly the bottom side is preferable) at a predetermined interval.

The leading end 13 of both long films 13 and 14
a and 14a are heat-sealed and connected integrally, and are in a slightly tensioned state as shown by the imaginary line in FIG.
The means for heat sealing both long films 13, 14 is
For example, a pair of heat sealers (not shown) are provided at a position downstream of the guide rollers 15 for guiding the respective long films in the film feeding direction. Then, the heat sealers are made to approach or separate from each other, and both films are sandwiched to seal.

The container 3 is transported by a transport device (not shown).
When the paper passes between the guide rollers 15, 15, both long films 13, 14 are fed out. After the container 3 has completely passed the guide rollers 15, 15, the sealers approach each other at the rear position of the container 3, thereby welding and cutting the rear portion of the container 3 of both long films.

As a result, the container 3 is fitted with the label 5 formed by forming the film into a cylindrical shape, and is further conveyed to the shrink process (see FIG. 2B). In such a shrinking step, the container 3 passes through the shrink tunnel, and at that time, the label 5 is heated, and contracts and becomes taut. Further, the heat-sensitive adhesive 10 is activated by heat at the time of contraction, and the contracted label 5 is adhered to the container 3. At this time, it is preferable to heat only the bottom side of the container of the label 5 or mainly the bottom side, and it is preferable to heat only the bottom side film while transporting the label 5 on a hot plate, for example.
This is preferable because the upper portion (lid side) is hardly heated, so that the film on the upper side does not shrink and deform, and the OPS lid having relatively low heat resistance is not heated.

Therefore, the label 5 can be securely sealed by tightening the container body 6 and the lid 7 in a tensioned state, and there is no possibility that the label 5 is accidentally removed from the container 3. When opening, the label 3 has a perforation 17
Is provided, the label 5 can be easily broken through the perforations 17. Moreover, since the heat-sensitive adhesive 10 is provided on a part of the label 5 (the bottom of the container body 6), it does not hinder the breakage of the label at the time of opening.

Further, since the container body 6, the lid 7 and the label 5 are made of the same material, there is no need to separate them at the time of disposal, and they can be disposed together, which is very convenient.

The label 5 has an OP having a small re-contraction force.
Since the S-shrink film is used, even if the package is cooked in a microwave oven, there is little risk that the label 5 will re-shrink due to heat during cooking and the container will be deformed by the shrinkage force.

The present invention is not limited to the above embodiment. For example, the shape of the container is not limited to a rectangular shape,
Any shape such as an elliptical shape or a polygonal shape can be adopted, as long as it can attach a label.

Further, the label 5 may be formed in a tubular shape from a film in advance, and heat-shrinkable after the tubular film is fitted on the container 3. In addition, the band state of the label is intended to include not only a linear shape but also an arbitrary shape such as a wavy shape.

Further, in the method of manufacturing a package according to the above embodiment,
Although the heat-sensitive adhesive 10 has been applied to the long film 13 in advance, the heat-sensitive adhesive 10 can be applied in a step of feeding the long film 13. The adhesive strength of the adhesive may be such that the label does not easily come off the container, and preferably does not transfer (adhere) to the container when the label is taken off.

[0027]

As described above, according to the present invention, a band-shaped heat-shrinkable film having a width set to cover a part of the periphery of a container is formed on a cylindrical label, and the heat-sealed film fitted on the container is formed. When heat shrinking the label made of the shrinkable film, the heat at the time of heat shrinkage activates the heat-sensitive adhesive applied to the heat shrinkable film and bonds the heat shrinkable film to the container, so that the label is It has a container sealing function,
Inadvertent detachment from the container can be prevented.

Further, since the label is wrapped around a part of the container, the material cost of the label can be reduced as compared with the case where the entire container is covered, and the package can be easily manufactured. In addition, since the label has a belt shape, there is an advantage that the label can be easily opened.

[Brief description of the drawings]

FIG. 1 is an overall perspective view according to an embodiment of the present invention.

FIG. 2 shows a manufacturing process of the package, (a) is a schematic cross-sectional view of a state in which a container unwinds a pair of long films,
(B) is a schematic cross-sectional view of a state where the container is fitted with a cylindrical label before heat shrinkage, and (C) is a schematic cross-sectional view of a state where the label is shrunk.

[Explanation of symbols]

3 ... container, 5 ... label, 6 ... container body, 7 ... lid, 10 ...
Heat-sensitive adhesive (adhesive), 13 ... Long film, 14 ...
Long film

Claims (4)

[Claims] 1. A container packaging method for mounting a cylindrical label around a container consisting of a container body and a lid fitted to the container body, the width being set so as to cover a part of the periphery of the container. The heat-shrinkable heat-shrinkable film is applied to the heat-shrinkable film when the heat-shrinkable heat-shrinkable film is formed into a tubular label. A method for packaging a container, comprising activating the heat-sensitive adhesive thus applied and bonding a cylindrical label to the container body. 2. A method for packaging a container, wherein a cylindrical label is mounted around a container comprising a container body and a lid fitted to the container body, the width being set to cover a part of the periphery of the container. The ends of a pair of heat-shrinkable long films wound and rolled together are adhered to each other, and the container is transported so as to pay out both long films. To form a cylindrical label by welding and cutting, and when the label fitted to the container is thermally contracted, the heat applied during the thermal contraction was applied to the film covering the container body side. A method for packaging a container, comprising activating a heat-sensitive adhesive to adhere a label to the container. 3. A package having a cylindrical label mounted around a container comprising a container body and a lid fitted to the container body, wherein the label covers a part of the periphery of the container. A package comprising a heat-shrinkable film having a width set in a cylindrical shape, and a heat-shrinkable label adhered to the container body with an adhesive. 4. The package according to claim 3, wherein the adhesive is a heat-sensitive adhesive activated by heat at the time of heat shrinkage of the label.