JP3127782U - Easy-open bag-shaped package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the heat seal portion of a packaging film from being easily cut even if an unexpected tearing force is applied during transportation or the like, so that the packaged object is not exposed, and the force is applied along the notch when opened. By adding, the bag-shaped package body which can open the surface film of the upper surface side of a packaged object in a tape shape, and can open it in the state which is easy to take out a packaged object is provided.
SOLUTION: An outer layer has a plastic film, an inner layer has an easily opened plastic film, and at least one of the outer layer and the inner layer is formed of a laminated plastic film having a linear cut property, and at least near the top and at the bottom A bag-shaped package having a heat seal portion in the vicinity thereof, and at least one of the heat seal portions is formed with a curved heat seal portion 61 having a convex shape when viewed in the cut direction. In addition, a notch 7 is formed between the curved heat seal portion 61 and the upper edge or the bottom edge 62 so as to match the direction of the linear cut property of the laminated film.
[Selection] Figure 1

Description

  The present invention relates to an easily openable bag-like package capable of easily opening an article to be packaged.

  As an easily openable bag-like package that can be easily opened, the bag-like package can be opened along the side edge of the package. In the case of a tray, even if the bag-shaped package is opened along the side edge of the package, there are few cases where it is difficult to easily remove the packaged items in the tray due to the side edge of the tray. Absent. Therefore, in the case where the tray is loaded, a means for cutting and opening so that the vicinity of the central portion of the packaging film on the upper surface side is opened has been proposed.

For example, in Patent Document 1, a non-heat seal portion is formed on one end surface of a package, and a linear heat seal portion is formed on the inside thereof, and a part of the heat seal portion is formed from the end surface of the non-heat seal portion. A means has been disclosed in which a notch is formed so as to reach the point, and a long cut is formed along the notch at the time of opening.
JP-A-10-230971

  However, in this case, since a notch is formed in the non-heat-sealed portion formed on one end surface of the package, unexpected or mischievous tearing force acts during transportation or customer selection, and the packaging film heats. There was a possibility that the sealed portion was cut and the packaged object was exposed. In this case, the heat seal part is formed in a straight line, and the tearing force usually acts not in a direction perpendicular to the direction of the straight heat seal part but in an inclined direction. A part of the part is cut in an inclined manner and stopped, and the heat seal part is in communication with the outside of the package to the extent that one point is not noticed.External oxygen gas and moisture enter the inside, and There was a risk of discoloration and decay.

  Even if unexpected or mischievous tearing force is applied at the time of transportation or customer's choice, the heat seal part of the packaging film is not easily cut, and the packaged object is exposed and external oxygen, moisture, etc. The surface film on the upper surface side of the non-packaged object is not subject to the discoloration or decay of the packaged object, and the force is applied along the notch formed in the heat seal part when opened. The object of the present invention is to provide a bag-shaped package body having an easy-open property that can be cut into a tape shape and opened in a state where the packaged article can be easily taken out.

  The present invention achieves the above object, and is a laminated plastic in which an outer layer has a plastic film, an inner layer has an easily openable plastic film, and at least one of the outer layer and the inner layer has a straight-cut property. A bag-shaped package formed from a film and provided with a heat seal portion at least near the top and near the bottom, and at least a part of the heat seal portion is a convex shape when viewed in the cut direction. And a notch is formed between the bent heat seal portion and the upper edge or the bottom edge, and matches the direction of the linear cut property of the outer layer of the laminated film. This is a bag-shaped package having easy-opening characteristics.

  The outer layer film is preferably formed of any one of polypropylene, polyester, polyamide, polyvinyl alcohol, polystyrene, and polylactic acid, and the outer layer is preferably formed of a gas barrier plastic film. The inner layer is preferably formed of a polyethylene-based multilayer film, a polypropylene-based multilayer film, a polyethylene copolymer film, or a polypropylene copolymer film, and the notch It is desirable that the heat seal part is formed at two locations and is connected so as to be substantially U-shaped at the heat seal part so as to have a tongue shape and be cut into a tape shape. .

  According to the easy-open bag-shaped package of the present invention, even if unexpected or mischievous tearing force acts during transportation or customer selection, the heat-sealed portion of the packaging film is not easily cut and covered. There is no risk of external oxygen and moisture from entering the package, causing decay, and applying force along the notch formed in the heat-sealed part when opening, so that the top surface of the non-package It is possible to provide a bag-like package body having an easy-open property that can be opened in a state in which the surface film on the side is cut into a tape shape and the packaged article can be easily taken out.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1-3, 1 is the bag-shaped package body which has the easy-opening property of this invention, Comprising: This bag-shaped package body 1 is mainly the front part 2, the back part 3, the upper heat seal part 4, and both-sides edge heat seal. Part 5, 5, bottom heat seal part 6 and notch 7 are formed. Here, a packaging form in which a bag-like product is formed by four-sided sealing of the packaging film is illustrated, but in addition to the three-sided sealing of the packaging film and the joint seal shown in FIG. 8 and the pillow packaging form in which the top and bottom are end-sealed The present invention can also be applied to various known packaging forms.

  As a packaging film used for the front part 2 and the back part 3, a laminated plastic film is used. A plastic film is used for the outer layer of the laminated film, and in particular, any one of stretched polypropylene, polyester, polyamide, polyvinyl alcohol, polystyrene, and polylactic acid film is used, and an easily openable plastic film is used for the inner layer. The inner layer easy-open plastic film is preferably formed of a polyethylene-based multilayer film, a polypropylene-based multilayer film, a polyethylene copolymer film, or a polypropylene copolymer film.

  A linear cut plastic film is used for at least one of the outer layer and the inner layer. This linearly cut plastic film is preferably a stretched polyamide film, a stretched polyester film, a stretched polypropylene film, or a high-density polyethylene film when used for the outer layer. A stretched polypropylene film with both unsealing properties is desirable.

  The outer layer film is preferably an oxygen gas barrier film such as an opaque aluminum vapor-deposited film, a transparent alumina vapor-deposited film, or a silica vapor-deposited film. Since intrusion can be prevented, the object to be packaged can be prevented from being oxidized, and can be stored for a long period of time.

  A wide heat seal portion 6 is formed in the vicinity of the top portion or the bottom portion of the surface portion 2 of the bag-like package 1 of the present invention. In FIGS. 6 is formed. A curved heat seal portion 61 is formed at least at a part of the heat seal portion 6, in the drawing, at a substantially central portion, and is bent so as to form a convex shape when viewed from the end face side. In addition, the curved heat seal part 61 may be formed over the full length of the heat seal part 6, and may be not only one but plural. Although the curved heat seal portion 61 is shown as a shape having the same width in the drawing, it is only necessary that the curved heat seal portion 61 has a convex shape when viewed from the end face side, and may have a shape with a changed width. .

  Two notches 7 and 7 are formed between the curved heat seal portion 61 and the bottom edge 62 so as to coincide with the direction of the linear cut property of the intermediate layer of the laminated film. The two notches 7 and 7 are connected so as to be substantially U-shaped in the heat seal portion 6 to form a tongue-like portion 71, which can be lifted to easily apply a tearing force. The film is easily cut into a tape shape along the two notches 7,7.

  Since the bag-shaped package 1 of the present invention is formed as described above, the tongue-shaped portion 71 formed by using the two notches 7 and 7 of the curved heat-sealed portion formed near the top or near the bottom. When pulling up, tearing proceeds in the notch direction and reaches the convex part of the curved heat seal part formed at a position that matches the notch direction. First, the heat seal part at the convex tip of the convex part is the surface part. 2 and the inner part of the back part 3 are peeled off and opened. In the present invention, since at least one part of the heat-sealed portion is curved, the cut line does not reach the inside of the packaging bag until the entire curved heat-sealed portion is opened. Even if it acts, the heat seal part of the packaging film is not easily cut, the packaged object is not exposed, and external oxygen gas and moisture do not enter inside.

  When opening the bent heat seal part, since an easy-open film is used for the inner layer of the laminate, the fusion part between the front surface part 2 and the back surface part 3 is relatively easy to peel off. It is relatively easy. In addition, in the state where the tearing exceeds the curved heat seal part, the surface part 2 and the back part 3 are not joined, so that the linear cut property of the laminated film is effectively exhibited and the linear tearing is performed. It is easy to open the tape.

  In this way, by pulling up the tongue-shaped portion 71 formed by using the two notches 7, 7 of the heat seal portion formed in the vicinity of the bottom portion, the tape is applied to the surface portion 2 of the package 1 as shown in FIG. The package can be cut and can be opened so that the article to be packaged loaded inside the package 1 can be easily taken out.

Example 1
A two-layer laminated film using a straight-cut stretched polypropylene film for the outer layer and an easy-open plastic film (TAF650C manufactured by Tosero Co., Ltd.) for the inner layer, as shown in FIG. The bag-shaped package 1 is formed in which the shape of the curved heat-sealed portion 61 is a curved shape that is convex outward, and the notches 7 and 7 are formed in a tongue-like shape 71 at positions that match the curved heat-sealed portion 61. .

  Even if an unexpected force is applied to the notches 7 and 7 of the obtained package 1, the cut line does not reach the inside of the packaging bag until the curved heat-sealed portion 61 is completely opened, and an unexpected tear force acts. However, the packaging film does not easily open and is excellent in tampering, but when the tongue-shaped portion 71 is pulled up with the intention of opening, the inner layers of the surface portion 2 and the back surface portion 3 of the curved heat-sealed portion 61 are formed. Since it is made of an easily openable plastic film, it can be opened relatively easily, and since the outer layer is made of a straight-cut plastic film, it has excellent straight-cut properties and is easily tape-shaped. I was able to open it.

  As shown in FIG. 6, the easily openable plastic film of the inner layer (TAF650C manufactured by Tosero Co., Ltd.) has a characteristic that the heat seal strength hardly increases even when the heat seal temperature applied during the production of the packaging bag fluctuates. Therefore, it exhibits excellent easy-openability.

  The value of the linear cut property of the outer layer polypropylene film was 2.3 mm. As shown in FIG. 7, the value of the cut property is a point b that is torn to a length of 100 mm from the notch a of the end surface along the direction of the cut property of the packaging bag in the inclined direction of the left front direction and the right front direction. It is the result of having measured the maximum deviation | shift amount in c. In addition, the cut test was performed 5 points at each of the left front and right front.

Example 2
Similar to Example 1, using a stretched polypropylene film for the outer layer and a two-layer laminated film using a stretched polypropylene film (FOLD-H manufactured by Futamura Chemical Co., Ltd.) having easy-opening and straight-cutting properties for the inner layer. Thus, a bag-shaped package 1 was formed.

  Even if an unexpected force is applied to the notches 7 and 7 of the obtained package 1, the cut line does not reach the inside of the packaging bag until the curved heat-sealed portion 61 is completely opened, and an unexpected tear force acts. However, the packaging film does not easily open and is excellent in tampering, but when the tongue-shaped portion 71 is pulled up with the intention of opening, the inner layers of the surface portion 2 and the back surface portion 3 of the curved heat-sealed portion 61 are formed. Since it is made of an easily openable plastic film, it can be opened relatively easily, and since the inner layer is made of a straight-cut plastic film, it has excellent straight-cut properties and is easily tape-shaped. I was able to open it.

  As shown in FIG. 6, the easy-open plastic film of the inner layer (FOLD-H manufactured by Futamura Chemical Co., Ltd.) hardly increases the heat seal strength even when the heat seal temperature applied during the production of the packaging bag varies. Therefore, it exhibits excellent easy-openability. In addition, the value of the linear cut property of the inner layer was 1.6 mm, and the linear cut property was also excellent.

Comparative Example 1
As shown in FIG. 4, a bag-shaped package was formed in the same manner as in Example 1 except that a linear heat seal portion was formed instead of the curved heat seal portion. As shown in FIG. 5, when the bevel-like portion 71 of the package is pulled up, if an unexpected force is applied to the notches 7, 7 of the resulting package, one of them is opened obliquely, The straight line cutting property and the tamper resistance were inferior.

Comparative Example 2
A bag-shaped package was formed in the same manner as in Example 1 except that a two-layer laminated film using a stretched polypropylene film as the outer layer and a polyethylene film (LDPE) as the inner layer was used. When the tongue-shaped portion 71 of the obtained package was pulled up, the adhesive strength between the surface portion 2 and the back surface portion 3 of the curved heat-sealed portion was too strong to be opened. As shown in FIG. 6, when the heat seal temperature applied at the time of manufacturing the packaging bag becomes high, the sealant portion becomes a seal between the surfaces, so that the heat seal strength is greatly increased and the polyethylene cannot be opened. .

Comparative Example 3
A bag-shaped package was formed in the same manner as in Example 1 except that a two-layer laminated film using a stretched polypropylene film as the outer layer and a non-stretched polypropylene film (CPP) as the inner layer was used.
When the tongue-shaped portion 71 of the obtained package was pulled up, the adhesive strength between the surface portion 2 and the back surface portion 3 of the curved heat-sealed portion was too strong to be opened. As shown in FIG. 6, unstretched polypropylene has a heat seal strength that increases when the heat seal temperature applied at the time of manufacturing the packaging bag is increased, and the sealant portion becomes a seal between the faces, and cannot be opened. It is.

  It is the top view (a) which shows an example of the four-side seal bag-shaped package body which has the easy-open property of this invention, and sectional drawing (b) seen from two directions.   It is the top view (a) and sectional drawing (b) which show the time of the opening start of the four-side seal bag-shaped package body which has the easy-open property of FIG.   It is a perspective view which shows the use condition of the four-side seal bag-shaped package body which has the easy-open property of FIG.   It is a top view of the bag-shaped package of a comparative example.   It is a slope view which shows the unsealing cut property when unexpected force is applied in a comparative example.   It is a graph which shows the relationship between the heat seal temperature of the inner layer of laminated | multilayer film, and heat seal strength.   It is explanatory drawing which shows the tear cut property test method.   It is the top view (a) which shows an example of the pillow bag-shaped packaging which has easy openability, and sectional drawing (b) seen from the TD direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag-shaped package 2 Front part 3 Back part 4 Upper heat seal part 5 Both-sides edge heat seal part 6 Bottom heat seal part 61 Curved heat seal part 62 Bottom edge part 7 Notch 71 Velcro part 8 Joint seal part

Claims (5)

  The outer layer has a plastic film, the inner layer has an easily openable plastic film, and at least one of the outer layer and the inner layer is formed of a laminated plastic film having a straight cut property, and heat seals at least near the top and bottom A curved heat-sealed part having a convex shape when viewed in the cut direction is formed on at least a part of any one of the heat-sealed parts. A bag having easy-opening characteristics, wherein a notch is formed between the seal portion and the upper end edge or the bottom end edge so as to coincide with the direction of linear cutability of the laminated film. Package.   2. The bag-like package having easy-openability according to claim 1, wherein the outer layer film is formed of any one of polypropylene, polyester, polyamide, polyvinyl alcohol, polystyrene, and polylactic acid.   2. The bag-like package having easy-openability according to claim 1, wherein the outer layer is formed of a gas barrier plastic film.   2. The bag-shaped package having easy-openability according to claim 1, wherein the inner layer is formed of a polyethylene-based multilayer film, a polypropylene-based multilayer film, a polyethylene copolymer film, or a polypropylene copolymer film.   The notches are formed at two locations on the heat seal portion, and are connected so as to be substantially U-shaped at the heat seal portion, forming a tongue shape, and can be cut into a tape shape. The bag-like package having easy-openability according to claim 1.

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