JP2000079970A - Sealing strip for packaging container and packaging container using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid an increase in cost and to provide a sealing strip which insures easy unsealing by using an expensive heat-shrinkable film only on a part requiring heat shrinkage in the sealing strip. SOLUTION: The sealing strip 3 is to be wound around the packaging container A, wherein only a lower part positioned on a bottom of the container A is formed to be heat-shrinkable along the direction of the strip. To embody this, an upper half 31 of the sealing strip is formed of a non-prestretched film or a paper material, a lower half 32 is formed of a prestretched film which can be heat-shrunk along the direction of the strip, and both halves are joined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band for a packaging container and a packaging container using the same.

[0002]

2. Description of the Related Art Conventionally, in a packaging container for food such as a lunch box which has been sold in a convenience store or the like, after the contents are stored in the container body, the lid is closed. In order to prevent the cover from opening unnecessarily, staples, adhesive tapes, and stretch films were used. Particularly in recent years, banding with a heat-shrinkable film (shrink film by stretching) has been increasingly used.

However, this type of film has many uses in place of labels in PET bottles and yogurt containers, and has a high cost, and the cost of forming the entire band seal with a heat-shrinkable film per se is high. Met. Moreover, since the film must be thermally contracted in the band direction (winding direction), a stretched film in the band direction has been used.
Therefore, even if you try to open by hand in the direction perpendicular to the band direction, it will be in the direction perpendicular to the stretching direction, so it is difficult to break, cutter,
Cut open with scissors, etc. or need to form perforations in advance,
There was trouble in processing.

Therefore, in the present invention, the costly heat-shrinkable film is used only in the portion of the band that requires heat shrinkage, thereby avoiding high cost and facilitating opening as a band. It is an object of the present invention to provide a variety of items and to provide an easy-to-use package for a packaging container.

[0005]

According to a first aspect of the present invention, there is provided a band seal which is wound around a packaging container and which is located on the bottom side of the container. Only the lower part is formed so as to be heat-shrinkable along the band direction. According to the banding device of the first aspect, only the lower portion located on the bottom side of the container is formed so as to be heat-shrinkable along the band direction. Then, the lower part of the band seal is thermally contracted by using a heating means such as mounting on a hot plate, hot air supply, steam supply, hot water supply, etc., so that the packaging container can be tightly wound with the band seal.

According to a second aspect of the present invention, the upper half of the band seal is formed of an unstretched film, and the lower half is heat-shrinkable along the band direction. The use mode as described in claim 1, wherein the lower half portion can be formed of a heat-shrinkable stretched film by being formed of a flexible stretched film and joining both halves. Can be realized. In addition, since the upper half is formed of a non-stretched film, it is easy to cut the film by hand when opening the band.

Further, according to the present invention, the upper half of the band seal is formed of a stretched film whose longitudinal direction is perpendicular to the direction of the band, and the lower half thereof is oriented in the direction of the band. Formed with a transversely stretched film that is heat-shrinkable along, and characterized in that both halves are joined, even if both the lower half and the upper half are stretched films,
Since the upper half portion is stretched in the vertical direction perpendicular to the band direction, it is easy to cut by hand along the stretching direction when opening the band seal, and opening the band is convenient. Further, since the lower half portion is stretched in the lateral direction along the band-sealing direction, the lower half is in the direction of tightening by heat shrinkage, and the winding of the packaging container is facilitated.

Further, the present invention is characterized in that the upper half film and the lower half film are formed of the same material or different materials as described in claim 4. As for the combination, a film made of a synthetic resin can be widely applied. Further, according to the present invention, as described in claim 5, the upper half of the band seal is formed of a paper material, the lower half is formed of a stretched film that is heat-shrinkable along the band direction, and the two halves are formed. It is characterized by the fact that paper material completely different from film can be used for the upper half as a band seal, and it also has a design feeling such as printing unique to paper material and the ease of breaking the band seal. it can.

[0009] As for the packaging container after storing the food or the like, which is the usage mode of the above-mentioned band seal, as described in claim 6, after the lid of the packaging container is covered with the lid, The method is characterized in that any one of the bands described in 1 to 5 is applied, and the lower part of the band is thermally contracted along the direction of the band so that the band is wound. Further, as described in claim 7, the main body of the packaging container or the main body with the lid is formed in a size capable of covering the main body or the main body with the lid.
After covering the band of No. 5 to 5, the lower part of the band is heat-shrinked along the direction of the band so that the band is wound tightly, so that it can be carried out even when the lid is omitted. .

[0010] In the packaging container provided with such a band, the lower portion (lower half) of the band is thermally shrunk along the direction of the band by the above-mentioned heating means, so that it can be easily wound up and packed. As a container, it is possible to simply and reliably perform winding by a band seal.

[0011]

Next, an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a use state of a band according to the present invention, and FIG. 2 is a cross-sectional view. In FIG. 1, 1 is a main body of a packaging container A, 2 is a lid, and 3 is a band. Reference numeral 31 in the band seal 3 denotes an upper half, and 32 denotes a lower half. Particularly, the lower half 32 located on the bottom side of the packaging container A is stretched so as to be heat-shrinkable along the band direction. It is formed using a film.

The upper half portion 31 and the lower half portion 32 are not limited to the half portions of the band 3 which are necessarily folded equally, but in the case of unevenness, for example, the lower half portion including the side surface and the lower surface. 32 and the lower half 32 only on the lower surface. S indicates a joint. And the upper half 31
Various implementations are possible for the combination with the lower half portion 32, and examples of the combination will be described below.

Combination of a non-stretched film and a stretched film (Claim 2) Upper half portion 31 ... Unstretched film Lower half portion 32 ... Stretched film (heat shrinkable) Only lower half portion 31 extends along the belt direction. The upper half 32 is not stretched so that it can be cut by hand when opening the band.

Although a stretched film which is easily heat-shrinkable is used, the upper half 31 is connected to the lower half 32 so that the band can be easily opened by hand.
In the case where the film is bonded by using a film having a different stretching direction from the above (Claim 3) Upper half portion 31 A longitudinally stretched film in which the stretching direction is perpendicular to the belt direction Lower half portion 32 … A stretched film in the transverse direction in which the stretching direction is heat-shrinkable along the band direction In such a combination film, the lower half portion 32 is heat-shrinkable along the band direction, and the upper film is related to the winding direction. It is easy to cut by hand along the longitudinal stretching direction without any.

When the film of the upper half 31 and the film of the lower half 32 are made of the same material (claim 4), for example, a. A polystyrene film, b. Polypropylene film, c. Polyethylene film, d. When the film of the upper half portion 31 and the film of the lower half portion 32 are made of different materials, such as a polyethylene terephthalate film (claim 4) Upper half portion 31... Polyethylene film Lower half portion 32. There are various combinations such as polypropylene film.

The following combinations may be employed to further facilitate the tearing of the upper half. (Claim 5) Upper half portion 31: paper material or nonwoven fabric Lower half portion 32: stretched film (heat shrinkable) As described above, various implementations are possible for the band seal according to the present invention. In order to express the technical idea of the present invention, combinations other than those exemplified above can be adopted if the effects of the present invention can be achieved. In addition, you may implement by holding a chopstick or a fork between the packaging containers A with the band seal 3.

Next, in order to obtain the above-described band seal according to the present invention, two cylindrical films are superimposed on each other and thermally bonded and bonded with an adhesive so that a large number of cylindrical bodies can be formed. It is formed by slitting (band sealing). For example, the case shown in FIG. 3 is an example of manufacturing the band seal of the above embodiment, and the upper half portion 31 uses a stretched film of longitudinal stretching XX which is a direction perpendicular to the band direction, and The half part 32 is cut and formed into individual band seals 3 after joining using a stretched film of laterally stretched Y-Y which can be thermally shrunk along the band direction. Reference numeral 33 denotes an example of a joint, and reference numerals 34 and 35 denote cut lines.

Further, the main body 1 and the lid 2 of the packaging container which is opened with a band include a molded product using a known synthetic resin sheet such as polystyrene, high impact polystyrene, polyethylene, polypropylene, polyethylene terephthalate, etc. It may be a molded product. Reference numeral 36 denotes a cut along the stretching direction XX for opening, and may be omitted if the opening is easy by hand depending on the material.

The packaging container A is closed using the band seal 3 of the present invention. The lid 2 is covered on the main body 1 of the packaging container A after storing the food and the like. The lower half 32 of the band 3 is placed on a hot plate, or heated using hot air, steam or hot water. What is necessary is just to heat-shrink 32 along a band direction, and to wind the band seal 3 around the packaging container A.

Further, the transparent band 3 is formed larger than the main body 1 of the packaging container A as shown in FIG. 4A, and the packaging container A is accommodated in the band 3 and then thermally shrunk. FIG.
If the packaging container A is tightly wound as shown in FIG. Also, as shown in FIG.
The packaging 3 may be formed to be larger than the packaging container A covered with the packaging container A, and the packaging container A may be stored in the packaging 3 as in the case of FIG.

[0021]

According to the band seal of the present invention, only the lower part of the band seal can be thermally contracted along the band direction.
Specifically, since only the lower half portion needs to be formed of a heat-shrinkable stretched film, the cost of the band can be reduced, and the upper half of the band can be easily opened. It is possible to realize a combination with a part, and very easy to open.

Various packaging containers can be easily closed and opened by using the band of the present invention, and can be implemented with great cost merit.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of a band seal of the present invention.

FIG. 2 is a sectional view.

FIG. 3 is a partially cutaway plan view showing a production example of a band seal.

FIG. 4A is a perspective view showing a modified example of a band seal, and FIG.
FIG. 2 is a perspective view showing a state after winding by a band seal.

FIG. 5 is a perspective view showing a modified use example of a band seal that covers substantially the entire packaging container.

[Explanation of symbols]

 A Packaging container 1 Main body 2 Lid 3 Banding 31 Upper half 32 Lower half

Claims (7)

[Claims] 1. A wrapper wound around a packaging container, wherein only a lower portion located at the bottom side of the container is formed so as to be heat-shrinkable along the zonal direction. . 2. The upper half of the band seal is formed of a non-stretched film, the lower half of the band seal is formed of a stretched film that can be thermally shrunk along the band direction, and both halves are joined. The band seal for a packaging container according to claim 1, wherein: 3. An upper half portion of the band seal is formed of a stretched film in a longitudinal direction whose stretching direction is perpendicular to the band direction, and a lower half portion of the band seal is formed of a heat-shrinkable transverse direction along the band direction. The band for a packaging container according to claim 1, wherein the band is formed of a stretched film and both halves are joined. 4. A wrapper for a packaging container according to claim 2, wherein the upper half film and the lower half film are formed of the same or different material film. . 5. The upper half of the band seal is formed of a paper material, the lower half of the band seal is formed of a stretched film that can be thermally shrunk along the direction of the band, and both halves are joined. 2. The packaging band for a packaging container according to claim 1, wherein: 6. After covering the main body of the packaging container with a lid, any one of the above-mentioned belts is subjected to banding,
A packaging container, wherein the lower part of the band is thermally shrunk along the direction of the band so that the band is wound. 7. The method according to claim 1, wherein the main body of the packaging container or the main body with the lid is covered with the band seal according to any one of claims 1 to 5, and the lower part of the band seal is arranged along the band direction. A packaging container characterized in that a band seal is wound by heat shrinking.