JPH0940011A - Package with tear tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve opening operation of a package with a tape for a lunch box. SOLUTION: An intermediate package formed in such a manner that a lid 3 is mounted on an upper opening of a container body 2 filled with lunch, the package is enclosed by a packaging film 4 excellent in heat-shrinkability and predetermined portions are sealed 5, 6 is heated to have the film heat-shrunk, thereby tightly attaching the film to the container body and the lid. A tape 7 is dispersively heat-bonded to an outer face of the packaging film located on an upper face of the intermediate package by a plurality of point seals 8. A cut 9 is formed at an intermediate site of the tape, an opening 11 is provided at a film site corresponding to the cut, and the opening is located close to the bonded sites 8. At the time of opening, the tape is broken from the cut to make free ends, and the tape is pulled in a predetermined direction with the end held. Then, pulling force is transmitted via the bonded sites to the opening, and the packaging film can be easily torn from the opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package with an unsealing tape, and relates to improvement of the unsealing property of a package in which an unsealing member is attached to a predetermined position of a packaging film.

[0002]

2. Description of the Related Art In recent years, many bento boxes have been sold at convenience stores, supermarkets, etc., but these bento boxes are usually manufactured at other locations such as centers and then transported to each shop. . And the said lunch box covers the opening part with a lid, after packing the content in the container main body opened at the upper part. The lid and the container body are fitted by unevenness,
It is temporarily fixed with adhesive tape. A container with a lid filled with such contents is used as an object to be packaged, and a periphery of the container is surrounded by a predetermined film to produce a package, which is transported, displayed and sold in the state of the package. As a result, the container with lid and the film come into close contact with each other, the lid is prevented from coming off the container body, and the lunch box does not pop out of the container body.

The packaging form of the above-mentioned package is as follows.
In general, one stretch film is used, and the stretch film is covered on the upper surface of the lid, and the four sides of the stretch film are pulled outward while being folded and brought into close contact with the bottom surface of the container body.

[0004]

However, the above-mentioned conventional package has the following problems. That is, considering the case of opening the package, it is necessary to grasp and spread the four sides folded on the bottom side of the container body in the reverse order of the folding, that is, from the last folded side in order. However, since the four sides of the stretch film are wrinkled and are in close contact with each other, it is often difficult to recognize at a glance which part expands first, and it was also tentatively understood. However, since they are in close contact with each other, it is relatively difficult to grip the relevant part.

Moreover, since the container body accommodates the lunch box, the package cannot be turned upside down, so the bottom side should be placed in an unnatural posture such as lifting the package upward or tilting it. The above-mentioned unsealing process may be performed while looking or it may be completely groped. Therefore, in combination with the above reason, it becomes very difficult to open the package. Further, since the stretch film is highly stretchable, it is difficult to tear it.

In order to solve such a problem, the inventor of the present invention covers the container containing the bento box with a heat-shrinkable packaging film, and visually confirms from above from the upper side or the side surface of the packaging film in a normal state. We have developed a package in which an unsealing tape is adhered to a position where
521). Then, in order to open the packaging body, first, the opening tape is grasped and pulled in a predetermined direction so that the packaging film adhered to the opening tape is cut.

By the way, the packaging film and the opening tape are
Since the materials are different and the melting points are also different, the optimum temperature conditions for heat sealing the both are also different. Therefore, if the temperature is set in accordance with the one having a higher melting point, the one having a lower melting point may be completely melted in the seal portion and sealing may be impossible. On the contrary, if the melting point is adjusted to the lower one, the higher melting point may not be sufficiently melted, resulting in poor sealing (small adhesion).

Thus, when the unsealing tape is pulled in a predetermined direction in an incompletely sealed state, stress concentrates on the seal portion, and the adhesive force is not interrupted by the stress, and only the unsealing tape separates from the packaging film. There is a risk that it will not be able to open it.

Further, in order to secure the adhesion between the packaging film and the unsealing tape, the invention of the prior application was heat-sealed to the packaging film over the entire length of the unsealing tape. However, since the packaging film and the unsealing tape have different heat shrinkage rates, when the unsealing tape is heated in the shrink tunnel after mounting, the unsealing tape does not shrink much while the unsealing tape does not shrink so much. Then, wrinkles occur and the opening tape becomes pulsating. Along with that, it looks bad.

The present invention has been made in view of the above background, and an object thereof is to adhere to a predetermined position of a packaging film in order to solve the above problems and improve the unsealing property of the packaging body. The opening tape can be securely torn and opened without being peeled off when the opening tape is gripped and pulled in the specified direction, and moreover, the specified part of the opening tape can be easily torn. An object of the present invention is to provide a package with an unsealing tape having improved unsealing property.

Further, even if the unsealing tape and the wrapping film having different heat shrinkage rates are used, the wrapping tape with the unsealing tape in which the film and the tape are in a taut state without wrinkles in the finally manufactured wrapping body is obtained. The other purpose is to provide.

[0012]

In order to achieve the above-mentioned object, in a package with an unsealing tape according to the present invention, an intermediate package formed by coating an article to be packaged with a heat-shrinkable packaging film is provided. On the other hand, a packaging body which is subjected to a predetermined treatment to shrink the packaging film, and which is obtained by integrating an unsealing tape at a predetermined position on the surface of the wrapping film by heat sealing, wherein the wrapping film and the unsealing tape are provided at a plurality of locations. The heat-sealing film is partially heat-fused and integrated by the point seal performed in, and a packaging film at a predetermined position between the adjacent predetermined point seals or between the end of the unsealing tape and the point seal adjacent to the end. An opening was formed in the substrate (claim 1).

Preferably, a notch is formed at a predetermined position of the unsealing tape, and an opening is formed in the packaging film at a predetermined position between both point seals adjacent to the notch (claim 2).

More preferably, a protective layer is formed on at least one of the packaging film and the unsealing tape existing in the region between the two point seals adjacent to the cut, and the unwrapping of the packaging film and the unsealing tape in the region. It is to keep the state (Claim 3).

When the opening is provided, it is arranged so as to be close to at least one of the adjacent two-point seals (claim 4). That is, according to the constituent features of this claim, the number of openings to be installed is arbitrary, and one or a plurality of openings may be provided. Further, the installation position in the case of one means that it is close to either one of the point seals. Also, in the case of a plurality, it means that at least one of the plurality is close to either one of the point seals.

As a more preferable solution than the above-mentioned claim 4, at least two openings are provided, and the two openings are arranged so as to be close to the adjacent point seals. (Claim 5).

Explaining the operation of the above means, the unbonded tape portion between the two point seals adjacent to the opening is pinched with a finger or the like (it is better to insert the finger between the unbonded tape and the packaging film). , Pull away from the packaging film.

Then, the force generated by the pulling is transmitted to the packaging film side through the point seal portion, and the packaging film is also pulled in the predetermined direction. Then, the force is applied to the opening, and the opening begins to be torn. That is, even if the adhesive strength of the point seal portion is small, the opening that has already been slit before the tape is peeled from the point seal portion is further slit, so that the tape and the packaging film remain integral. Then, once it begins to be severely torn, the tape is further pulled, whereby the packaging film is torn along the direction of the tear.

Then, the tape can be visually recognized from the outside in a state where the top and bottom of the package are placed in a normal posture, and the tape can be easily grasped in that state.
Therefore, since the package can be opened without lifting or flipping it over, the lunch box, which is the content, does not pop out or adhere to the lid.

Further, since the tape and the wrapping film are discretely and partially fused by the point seal, the tape and the wrapping film are unsealed in the area between the adjacent point seals. Therefore, when the intermediate packaging body is heated to heat-shrink the packaging film, even if the film and the tape have different heat shrinkage rates, they are absorbed by the unsealed portion and wrinkles do not occur.

According to the second aspect of the invention, the tape has a notch at a predetermined position. Therefore, in order to open the package, when the tape is cut from the cut portion, the cut portion becomes two free states, and it becomes easy to grip. When the notch is formed in the middle portion of the tape, the gripping portion is located at a position such as the center of the upper surface of the packaging body where it is easy to hold, so that it can be easily pinched with a smaller force.

On the other hand, according to the third aspect of the present invention, depending on the compatibility between the tape and the packaging film, there is a possibility that the intermediate packaging body will be lightly fused by the heat treatment. However, since the protective layer is present, there is no possibility that the tape and the packaging film will come into direct contact with each other, and the unbonded state is reliably maintained. Therefore, it is possible to reliably cut the tape from the notch when opening, and the opening is not fused and closed with the tape, and the packaging film is surely pulled from the opening by pulling the tape after the cutting. It is torn and opened.

Further, by pulling the tape, the force concentrates on the point seal portion. Therefore, according to the fourth aspect, since the opening is on the side of the point seal portion, the pulling force is efficiently applied as it is to the opening, and the opening is surely torn to a large extent.

Further, according to the fifth aspect, the openings are formed in the vicinity of the point seals adjacent to both sides of the cut. Therefore, 2 of the tape divided by the notch
No matter which one of the two free ends is pulled, there is an opening in the vicinity of the point seal portion added by the pulling, so the packaging film is easily torn from the opening.

[0025]

1 to 3 show an example of an embodiment of a package with an opening tape according to the present invention. As shown in the figure, the packaging body 1 according to the present example has a box lunch (not shown) as a content packed in a flat rectangular container body 2 having an upper opening, and the upper opening is transparent. A plastic lid 3 is attached. By mounting the lid 3 on the container body 2, the container of the present invention is constructed. In this example, the lid 3 is provided separately from the container body 2 and attached thereto, but it may be integrally formed or may not have the lid.

The entire circumference of the container body 2 and the lid 3 is surrounded by a packaging film 4 having a good heat shrinkability, and an intermediate packaging body formed by surrounding in a sealed state is passed through the shrink tunnel. It is formed by bringing the packaging film 4 into close contact with the container body 2 and the lid 3 by heating and shrinking by heating. The container body 2
The lid 3 and the lid 3 are in a lightly fitted state, but the final locking force between the two is obtained by the above-mentioned adhesion of the packaging film 4. Moreover, you may fix with an adhesive tape etc. as needed.

The specific form of the package in this example is a so-called pillow package type, and one packaging film 4 covers the entire circumference of the container body 2 and the lid 3 and heat seals both side edges ( The end portions on the opening side of the tubular film, which is formed by forming the center seal portion 5) and has both ends opened, are further heat-sealed (end seal portion 6).

In the present embodiment, the seal portions 5 and 6 at the overlapping end have a predetermined width. However, the present invention is not limited to this, and a seal portion having no seal width can be formed by, for example, fusing sealing. Good.

An unsealing tape 7 is attached to a predetermined position (on the center line in this example) on the upper surface of the package 1 having the above structure. As shown in FIG. 2, the bonding method is to bond to the outer surface of the packaging film 4, and the bonding site 8 is composed of a plurality of point seals that are separated by a predetermined distance along the center line of the tape 7. It This point seal (adhesion site)
For example, the tape 7 such as heat seal or impulse seal and the packaging film 4 are heat-fused to be integrated and partially fusion-bonded. Further, the end portion of the tape 7 is fused and fixed to the end seal portion 6. As a result, even if the intermediate package is heat-shrinked by passing through the shrink tunnel, the end portion of the tape 7 remains integrated with the end seal 6 as illustrated.

At the intermediate position in the longitudinal direction of the tape 7,
Notches 9 are formed from both sides. This notch 9
In this example, is formed only on the tape and is not cut on the side of the opposing packaging film 4.

The distances between the adhering portions 8 adjacent to each other may be equal intervals or unequal intervals, but at least the distance W between the adhering portions 8 located on both sides of the cut 9.
Has a length such that a finger can be inserted between the tape 7 and the packaging film 4 in that portion.

Further, in this example, a protective layer 10 is formed on the surface of the packaging film 4 facing a certain area including the cut 9 (area between the adjoining adhesive portions 8), and the tape 7 and the packaging film 4 are brought into contact with each other.・ Prevents adhesion.

The protective layer 10 is formed, for example, by applying a printing ink to the solid. At this time, for example, when red ink or the like is used, the portion of the protective layer 10 is conspicuous, so that the user's attention can be easily drawn, and the portion to be gripped at the time of opening can be easily known. In addition, the protective layer 10 can adopt various means such as applying oil instead of ink or sticking a label. Also,
The protective layer 10 may be formed on the side of the packaging film 4 as in this example, but may also be formed on the side of the tape 7.

Further, an opening 11 is provided at a predetermined position of the packaging film 4 in the area where the protective layer 10 is provided. As shown in FIG. 3, the opening 11 is composed of a straight line having a length substantially equal to the width of the tape 4, and is provided at a position close to the bonding portions 8 located on both sides of the cut 9 as shown in FIG. There is. Then, the opening 11 allows the protective layer 10,
A part of the packaging film 4 is previously cut.

In order to open the package having the above-mentioned structure, first, as shown in FIG. 1, with the lid 3 placed in a normal position with the lid 3 positioned above, first grip the portion of the tape 7 where the notch 9 is formed, The tape 7 is cut along the notch 9. At this time, the distance W between the adhesive parts 8 located on both sides of the notch 9
Since the width is larger than the width of the finger, the finger can be easily inserted between the tape 7 and the packaging film 4, which is the unsealed area between the adhesion sites 8. Therefore, the tape 7 is easily divided by the notch 9 by moving the finger upward while the finger is inserted as described above. As a result, the respective tape 7 parts divided at the center are both free from the packaging film 4, so that they are gripped one by one and pulled along the arrangement direction of the tape 7.

Then, the force applied to the tape 7 is concentrated on the adhesive portion 8 between the tape 7 and the packaging film 4. Due to this force, a force to pull up the packaging film 4 together with the tape 7 is added. At this time, the reaction force from the packaging film 4 side causes the tape 7 and the packaging film 4 to peel off at the bonding site 8 at the same time. However, since the opening 11 is provided in this example, the packaging film 4 is torn from the opening 11 based on the force to pull up the packaging film 4, and the packaging film 4 is opened. In particular, since the opening 11 is provided near the adhesion part 8, the force applied to the adhesion part 8 is efficiently applied to the opening 11 and is easily torn.

When the tape 7 is pulled to the end as it is, the cut film portion is further cut, and the upper surface of the package 1 opens from the center to the peripheral edge. The same process is performed on the remaining tape 7. As a result, the upper surface of the package 1 and a part of the side surface connected to it are
Wide open. Therefore, the remaining packaging film 4 can be easily torn and the package can be opened.

Since the tape 7 is formed on the upper surface of the wrapping body 1, the above-mentioned unsealing process can be performed with the wrapping body placed on the desk, and moreover, the portion to be gripped (the notch 9).
Since it is possible to easily visually recognize the (formation part), it is possible to open the package very easily as compared with the conventional one, and it is not necessary to incline or lift the package, so that the bento is not accidentally dropped.

FIG. 4 shows another embodiment of the present invention. As shown in the figure, in this example, the tape 7 is not cut, and the opening 11 is formed at the end 7a of the tape 7.
It is provided on the side. In this example as well, the protective layer 10 is provided in the film portion where the opening 11 is formed.

With such a construction, in order to open the tape, first, a finger is inserted into the end portion 7a of the tape 7 to pinch it, and the tape 7 is pulled in a predetermined direction in that state. Then, the end portion 7a of the tape 7 separates from the end seal portion 6 to become a free end portion, and the packaging film 4 is torn from the opening portion 11 by the same principle as described above. That is, in this example, the tape 7 is not divided into two, but the other operational effects are the same as those of the embodiment shown in FIGS. 1 to 3 described above.

FIG. 5 shows still another embodiment of the present invention. As shown in the figure, in the present example, unlike the above-mentioned respective forms, the end portion 7a of the tape 7 is connected to the end seal portion 6
It is free without integrating with. When the end portions are free in this way, there is no need to separate the tape 7 from the end seal portion 6 as in the form shown in FIG. 4, and the end portions 7a can be picked up in a predetermined direction (tape arrangement). The wrapping film 4 is torn from the opening 11 by pulling the wrapping body 1 in the direction), and the wrapping body 1 can be opened.

Although the protective layer 10 is provided in each of the above-described embodiments, the protective layer 10 does not necessarily have to be formed in the present invention. That is, the protective layer 10 is provided in order to prevent the packaging film and the tape from being fused to each other due to heat at the time of shrinking. If there is no such concern, it is not necessary to provide the protective layer 10.

Further, although the openings 11 are provided in the vicinity of the respective bonding portions 8, the present invention does not necessarily have to do so. For example, only one opening is formed, or the formation position is also the bonding portion. It may be located away from 8.

Further, as the packaging form to be applied, the example shown in the drawing is applied to the pillow packaging type, but it goes without saying that it can be applied to various packaging forms and the arrangement of the tapes. The direction is also formed along the longitudinal direction of the upper surface in the above-mentioned example, but the present invention is not limited to this, and may be a direction orthogonal to the longitudinal direction. May be. Further, the opening tape may be attached at any position along the side edge of the upper surface, or a plurality of tapes may be formed.

Further, in each of the above-mentioned embodiments, the tape 7 is arranged from one end to the other end of the packaging body. However, the tape 7 is pulled by pulling the tape 7 as long as possible so that the packaging film is not torn. This is to increase the distance covered, but it is not always necessary to cross it.
However, if the length is too short, the portion to be cut will be small and the subsequent opening operation will be hindered. Therefore, it is preferable to set the tape to the above-mentioned embodiment or close to it (the tape end is positioned near the side edge).

[0046]

As described above, in the packaging body according to the present invention, since the opening is formed at the predetermined position on the packaging film side, when the tape is pulled, the tape is sealed to the packaging film via the point seal portion. Since the transmitted force is applied to the opening as it is, the packaging film is torn from the opening. Therefore, the package can be easily opened.

Moreover, since the packaging film and the tape are discretely joined by the point seal, and the other portions are not adhered to each other and are in a free state, even the unsealing tape and the packaging film having different heat shrinkage rates. Even when using, the two will try to shrink according to their own heat shrinkage rates during the heat treatment of the intermediate package, but since there are few joint surfaces, there is little influence on each other, and they are absorbed in the unbonded part and become large. The film and tape can be made taut without wrinkling.

According to the second aspect of the invention, since the notch is formed in the central portion of the tape attached to the packaging film, the notch is cut at the time of opening to cut the tape from the middle portion of the tape, thereby making two free tapes. It is possible to form an end portion (grip portion). Therefore, the free portion can be easily grasped and the tape can be pulled in the predetermined direction in this state.

In particular, according to the third aspect of the invention, the opening tape and the wrapping film are kept in an unbonded state even if they receive heat when passing through the shrink tunnel or the like.
As a result, the notch provided in the tape remains as it is, and the opening is not closed, so that the tape can be easily opened by the procedure described above.

When the opening is provided in the vicinity of the bonding portion as in the fourth and fifth aspects, the packaging film can be reliably opened with a smaller force, and particularly when the fifth aspect is adopted, the packaging film is divided. Whichever of the tapes is gripped and pulled in a predetermined direction, the tape can be reliably opened with a small force, and the directionality at the time of opening is lost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a package with an opening tape according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the relevant part.

FIG. 3 is an enlarged plan view of an essential part showing a state in which the unsealing tape is removed.

FIG. 4 is a perspective view showing an example of another embodiment of a package with an opening tape according to the present invention.

FIG. 5 is a perspective view showing an example of another embodiment of a package with an opening tape according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging body 2 Container body 3 Lid 4 Packaging film 7 Tape 7a Edge part 8 Adhesive part 9 Notch 10 Protective layer 11 Opening part

Claims (5)

[Claims] 1. An intermediate wrapping body, which is formed by coating an article to be wrapped with a heat-shrinkable wrapping film, shrinks the wrapping film by a predetermined treatment, and places the wrapping film on a predetermined position on the surface of the wrapping film. A packaging body in which an unsealing tape is integrated by heat sealing, wherein the wrapping film and the unsealing tape are partially heat-sealed and integrated by point sealing performed at a plurality of points, and the adjacent predetermined point seals A package with an unsealing tape, characterized in that an opening is formed in a wrapping film at a predetermined position between the ends of the unsealing tape or a point seal adjacent to the end. 2. The notch is formed in a predetermined position of the opening tape, and an opening is formed in a packaging film at a predetermined position between both point seals adjacent to the notch. Package with tear tape. 3. A protective layer is formed on at least one of the packaging film and the unsealing tape existing in the area between the two point seals adjacent to the cut, and the unbonded state between the packaging film and the unsealing tape is maintained in the area. The package with an unsealing tape according to claim 1 or 2, characterized in that it is held. 4. The package with an opening tape according to claim 1, wherein the opening is arranged so as to be close to at least one of the adjacent two-point seals. 5. The method according to claim 1, wherein at least two openings are provided, and the two openings are arranged so as to be close to the adjacent point seals. A package with an opening tape as described above.