JPH0891431A - A package that can be easily opened and a packaging method therefor - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a package which can be easily opened when a package is taken out from the package, and a method for producing the package. In a package in which a synthetic resin film is wrapped around a packaged object and both ends thereof are heat-sealed, a thread is inserted into the package, and both ends of the package are packaged. An easily opened package characterized in that it is fixed by heat seal parts at both ends of the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for daily necessities, foods, etc. using a synthetic resin film, and a packaging method therefor. More specifically, the present invention relates to a package in which a synthetic resin film can be more easily torn when taking out an article to be packaged from the package, and a packaging method thereof.

[0002]

2. Description of the Related Art Conventionally, in order to protect daily necessities, foods, etc., or to ensure the virginity of contents, packaging with a synthetic resin film has been widely performed. In addition, the traders who perform packaging of these daily necessities and foods have been trying to save labor and improve the packaging speed by using automatic packaging machines such as pillow packaging. Furthermore, these packages are made by heat-shrinking the wrapped synthetic resin film for the purpose of accumulating and binding the items to be packaged, or imparting tightness to the packages to enhance their beauty. The method, so-called shrink wrapping, is widely practiced. However, the product packaged with the synthetic resin film as described above has a problem that it is difficult for a consumer to open the product. In particular, when the encapsulated synthetic resin film is heat-shrinked and the object to be packaged and the synthetic resin film are in close contact with each other, there is a problem that it is difficult to open.

As a means for solving this drawback, a perforation line made of perforations is provided on the film, a slit (cutting groove) is provided on the film, and an opening label is stuck on the slit, or a package is formed. The method of sticking the cut tape on the inner surface of the was used. However,
The method of (1) has a problem that the appearance of the package is deteriorated because the film has perforations and the film is cut during packaging. Further, when it is applied to shrink wrapping, the object to be packed and the synthetic resin film are in close contact with each other, so that the effect of improving the unsealing property cannot be exhibited. On the other hand, the method (1) is one effective means, but not only has the drawback that only the vicinity of the slitted portion is opened, but also the adhesiveness between the label for opening and the synthetic resin film, or adhesiveness. If the property is not sufficient, there is also a drawback that only the label for opening is peeled off at the time of opening and does not function at all. Furthermore, the method (1) has a problem that the packaging film and the cut tape have to be adhered or adhered at the time of packaging, which complicates the packaging process and increases the packaging cost.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide a package which can be more easily opened and a method for producing the package.

[0005]

Means for Solving the Problems The inventors of the present invention have earnestly studied means for solving the above problems. As a result, according to the present invention, a synthetic resin film is wrapped around the object to be packaged, and a package in which both ends thereof are heat-sealed,
There is provided a package which is easy to open, in which a thread is inserted inside the package, and both ends of the thread are fixed by heat seal portions at both ends of the package. Preferably, a notch is provided in the edge of the package near the location where the ends of the filamentous material are fixed by the heat seal parts at both ends of the package, and the package is easy to open. There is provided a body, and preferably, the above-mentioned easy-open packaging body is provided, wherein the article to be packaged is an article placed on a tray, or a boxed article, and preferably A package body that is easy to open, characterized in that the encapsulated synthetic resin film is heat-shrinkable, and the synthetic resin film is formed into a tubular shape around the packaged object, or , A synthetic resin film formed in a tubular shape When the object to be packaged is inserted into the tube of the drum and the synthetic resin film is molded into a tube, the filamentous material is supplied so as to be positioned inside the tube, and then both front and rear ends of the object to be packaged. From the above, there is provided an easy-open packaging method, characterized in that heat-sealing is performed in a state in which the filamentous material is sandwiched between the synthetic resin films at positions appropriately spaced from each other. When heat-sealing a position appropriately spaced from both front and rear ends, cutting of the synthetic resin film between each package, and the attachment of the notch is performed at the same time, an easy packaging method of the opening is provided. It

As the synthetic resin film used for the easily opened package of the present invention, a single layer film made of polyethylene, polypropylene, nylon, polyester, soft polyvinyl chloride, polybutadiene or the like, or a laminated film made of these resins is used. Alternatively, a single-layer film obtained by blending a plurality of the above resins, or a laminated film made of a resin obtained by blending a plurality of the above resins can be mentioned. When the package of the present invention that is easy to open is shrink-wrapped, a synthetic resin film that is uniaxially or biaxially stretched to have heat shrinkability is used.

The filamentous material used in the easily opened package of the present invention is obtained by spinning natural fibers such as cotton and hemp, or polypropylene, polyethylene, fluorine resin, polyester, nylon, acrylic resin, polystyrene. , Synthetic resin such as polycarbonate, vinylon, etc.
Alternatively, a tape-shaped product may be used. Since it is desirable that these filaments do not stretch due to the tension when the package is opened, synthetic resin filaments are uniaxially or biaxially stretched to increase the tensile elastic modulus. Those are preferable. Further, in the case of shrink wrapping, it is desirable to use a filamentous material having heat shrinkability from the viewpoint of packaging finish. Furthermore, when heat sealing is performed with the filamentous material sandwiched between the synthetic resin films at positions spaced appropriately from the front and rear ends of the packaged object, the filamentous material is firmly fixed by the synthetic resin film. More preferably, the filaments are thermoplastic. The thickness of the filamentous material, the width of the tape-like material, and the like can be appropriately selected depending on the thickness and material of the synthetic resin film used in the package.

The package of the present invention, which is easy to open, is
The filamentous material is inserted into the package, and both ends of the filamentous material are fixed by heat seal portions provided on both ends of the package. That is, the filamentous material in the package is only located along the inner surface of the synthetic resin film of the packaging body, and the filamentous material and the inner surface of the synthetic resin film are not fixed by adhesion or the like.

Further, in the easily opened package of the present invention, notches are provided at the edges of the package near the positions where the ends of the filamentous material are fixed by heat sealing of both ends of the package. Momo is preferable because it is easier to open. The edge of the package in the vicinity of the location where the end of the filamentous material is fixed is a part of the heat-sealed portion applied to the end of the package,
The end of the filamentous material is fixed between the synthetic resin films, and the edge of the synthetic resin film forming the edge of the package near the heat seal part to which the end of the filamentous material is fixed is means. The term “near” means a distance of 1 to 50 mm, more preferably 1 to 10 mm, from the position where the end of the filamentous material is fixed. At this distance, opening is easier. And the notch is
It is applied from the edge of the synthetic resin film toward the center of the package.

The package of the present invention, which is easy to open, will be described below with reference to the drawings. FIG. 1 is a schematic view of a packaging body showing one embodiment of the present invention as seen from the back side. The synthetic resin film (1) is wrapped around the object to be packaged (2), the both ends of the synthetic resin film are center-sealed (5), and the synthetic resin film is formed into a tubular shape. In FIG. 1,
The center seal adopts a welding or gassho heat sealing method, but it does not matter if the center sealing is performed by an envelope sticking heat sealing method or a fusion cutting heat sealing method. Further, the position of the center seal does not necessarily have to be located on the back surface of the package, and it does not matter at which position on the package. Further, when the synthetic resin film is not a flat film but a tubular film, the center seal is not necessary as a matter of course.

The filamentous material (3) is provided inside the package.
Is inserted, and side seals (4) are provided at positions appropriately spaced from the front and rear ends of the packaged object. Moreover, both ends of the thread (3) are fixed by the seal. In FIG. 1, the side seal adopts the welding and gassho heat sealing method, but it does not matter if the side sealing is performed by the fusion heat sealing method. Further, the length of the filamentous material inserted into the package is not particularly limited, but it is preferable from the viewpoint of packaging finish that the length is substantially the same as the length between both ends of the package.

Further, in the package, a notch (6) is formed on the edge of the film forming the edge of the package near the position where the side seal (4) fixes the end of the thread (3). ) Is provided. In FIG. 1, the notch is formed from the edge of the film to the front of the side seal. However, the notch extends from the edge of the film to the middle of the side seal or from the edge of the film to the side seal. It may be applied to the inside of the package. From the standpoint of the sealability of the package and the like, it is preferable that the notch is provided up to the side of the side seal portion. Further, in FIG. 1, notches are provided only near one end of the filamentous material, but notches may be provided near both ends of the filamentous material. Furthermore,
In FIG. 1, the I-shaped notch is provided, but a V-shaped notch or any other notch may be used.

Next, a method for opening the package of the present invention will be described. First, the end of the filamentous material fixed by the heat seal (in FIG. 1, the side seal (4)) is grasped, and the filamentous material is pulled so as to tear the heat seal portion and the synthetic resin film, and the package is crushed. Let me open it.
At that time, if a notch is attached to the film edge forming the edge of the package near the heat-sealed portion to which the end of the filamentous material is fixed, a trigger for tear propagation will be provided, and heat will be applied. The tearing of the seal portion, the synthetic resin film, etc. can be started more easily.

The easily opened package of the present invention is effective for packaging articles placed on a tray or boxed articles. It is particularly suitable for these shrink wraps. When the item to be packaged is an item placed on a tray or an item packed in a box, the thread-like object inserted into the package does not get entangled with these items, and the item is damaged when pulled. It is preferable because it does not exist. Moreover, the packaging of such an article, particularly the packaging in which these articles are shrunk, cannot be grasped because the object to be packaged and the packaging film are often in close contact with each other, and the packaging cannot be opened. Since it is said to be difficult, the effect of the present invention can be remarkably exhibited.

Further, a method for manufacturing the easily opened package of the present invention will be described. First, a synthetic resin film is formed in a tubular shape around the packaged object, or the packaged object is inserted into the cylinder of the tubular synthetic resin film. Both ends of the cylindrical synthetic resin film are bonded together by heat sealing or the like to form a center seal portion. Moreover, when the synthetic resin film is formed into a tubular shape, the synthetic resin film is supplied at the same time as the filamentous material is supplied.
The filamentous material is shaped like it is inserted in the cylinder. The heat-sealing of the present invention is performed at a position that is appropriately spaced from both front and rear ends of the packaged object, and in which the thread is sandwiched between the upper and lower synthetic resin films forming the tubular body. Get the package. The cutting of the synthetic resin film between the packages can be performed before heat sealing, after heat sealing, or simultaneously with heat sealing.

Further, preferably, a notch is provided at the edge of the synthetic resin film near the position where the end of the filamentous material is fixed by the heat seal part. The notch can be attached by hand, but it is preferable to attach a notch to the blade for cutting the synthetic resin film between the packages and attach the notch at the same time as the film cutting. At the same time as the heat sealing, it is possible to cut the synthetic resin film between each package and attach a notch.
The notch may be attached not only by a cutting tool but also by fusing with a hot plate or the like.

Hereinafter, a method of manufacturing the easily opened package of the present invention will be described with reference to the drawings. FIG. 2 is a perspective view showing steps of the packaging method according to the embodiment of the present invention. or,
FIG. 3 is a perspective view showing the structure of a heat sealing device and a film cutting device used in the packaging method shown in FIG. 2, and a sealing device having a notch attachment device.

First, a flat synthetic resin film (biaxially stretched polypropylene film) (1) having a thickness of 15 μm is supplied to a former (9) while punching holes for air bleeding at the time of shrink packaging with a punching roll (14). Then, the film is formed into a tubular shape, and both end portions of the film are heat-sealed (center-sealed) with a rotary heat-sealing plate (10) having a round structure. At this time, the thread (cotton thread) (3) was supplied at the same speed as the polypropylene film, and the cotton thread was inserted into the cylinder of the cylindrical synthetic resin film (biaxially oriented polypropylene film). Shape. Then, the article to be packaged (2) is inserted into the cylinder of the synthetic resin film (biaxially oriented polypropylene film) by the belt conveyor (8). Thereafter, the tubular body of the synthetic resin film (biaxially oriented polypropylene film) into which the object to be packaged is inserted is provided with a carrier belt (11), a sealing device and a film cutting device as shown in FIG. 3, and a notching device. Sealing device (1
Guided to 2), heat sealing (side sealing) at positions appropriately spaced from the front and rear ends of the packaged object, film cutting between the packaged objects, and provision of notches are performed. afterwards,
The synthetic resin film (biaxially stretched polypropylene film) is heat-shrinked by passing through a shrink tunnel (13) in an atmosphere of 150 ° C. to obtain a shrink-wrapped package having good openability.

As shown in FIG. 3, the sealing device has a structure in which a cutting edge (16) for cutting a film and a cutting edge (17) for notching are located between a pair of heat sealing bars (15). Have A pair of heat seal bars (15) heat-seal (side seal) the rear end of the preceding package and heat seal (side seal) the front end of the subsequent package, and at the same time, for cutting the film. The synthetic resin film between the packages is cut by the post (16) and the post (1) for notching is provided.
A notch is attached by 7).

[0020]

EFFECT OF THE INVENTION The easily opened package of the present invention can be easily opened by anyone by simply grasping and pulling the end of the filamentous material. It is possible to exert a remarkable effect on the packaging of the articles placed on the tray or the boxed articles, particularly, these shrink packaging. Moreover, since the packaging method of the present invention that is easy to open is simple and enables high-speed automatic packaging, packaging can be performed easily and at low cost.

[Brief description of drawings]

FIG. 1 is a schematic view of a packaging body showing one embodiment of the present invention as seen from the back.

FIG. 2 is a perspective view showing steps of a packaging method according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a structure of a sealing device used in the packaging method shown in FIG.

[Explanation of symbols]

 1. Synthetic resin film 2. Items to be packaged 3. Filament 4. Side seal 5. Center seal 6. Notch 7. Bobbin wound with filamentous material 8. Belt conveyor 9. Former 10. Heat seal plate having a round structure 11. Carrier belt 12. Sealing device 13. Shrink tunnel 14. Roll for punching 15. Heat seal bar 16. Hagane for cutting film 17. Hagane for notching

Claims (6)

[Claims] 1. A packaging body in which a synthetic resin film is wrapped around a packaged object and both ends thereof are heat-sealed, and a thread is inserted into the package, and both ends of the thread are A package which is easy to open, characterized in that the parts are fixed by heat seal parts at both ends of the package. 2. A notch is provided in the edge of the package near the location where the ends of the filamentous material are fixed by the heat seal parts at both ends of the package.
A package which can be easily opened as described in. 3. The easily opened package according to claim 1, wherein the article to be packaged is an article placed on a tray or a boxed article. 4. The easily opened package according to any one of claims 1 to 3, wherein the encapsulated synthetic resin film is heat-shrinked. 5. A synthetic resin film is formed in a tubular shape around an article to be packaged, or the article to be packaged is inserted into a tube of a synthetic resin film formed in a tubular shape, and the synthetic resin film is tubular. The filamentous material is fed so that the filamentous material is located in the cylinder when the filamentous material is molded, and then the filamentous material is interposed between the synthetic resin films at positions appropriately spaced from the front and rear ends of the packaged object. An easy-open packaging method, characterized in that heat-sealing is performed while sandwiching the sandwich. 6. The method of cutting a synthetic resin film between each package and attaching a notch at the same time when heat-sealing a position appropriately spaced from both front and rear ends of the packaged object. Item 6. An easy-opening packaging method according to Item 5.