JP2019001525A - Packaging bag - Google Patents

Abstract

To provide a packaging bag suppressing a risk of problem in opening due to a break line not reaching an end edge opposite to a notch.SOLUTION: A rectangle packaging bag formed with films layered and having at least three end edges sealed to form a storage part includes a first weakened line at which strength of the films is weakened and elongating from a first end edge that is one of the three end edges through the storage part to a second end edge opposite to the first end edge and a first notch to trigger breakage of the films when the storage part is opened at the first end edge. The first weakened line passes through an area between a first straight line elongating from the first notch to the second end edge in a direction orthogonal to the first end edge and a third end edge that is an edge closer to the first notch among end edges neighbouring the first end edge.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag.

  After folding a single rectangular laminated film in half and sealing the combined edges to form a container, a set of rectangular laminated films and a pair of rectangular laminated films are stacked on top of each other. A packaging bag such as a four-side sealed bag formed by sealing (heat sealing) to form an accommodation portion is known.

  In Patent Document 1, a weakening line (scheduled opening line) that extends in parallel along each of two adjacent edges among the four edges, and whose strength is weakened by a half cut or the like, is formed on the front and back laminated films. A rectangular packaging bag (four-side seal bag) formed in the above is disclosed. In this packaging bag, for example, a sheet-like content such as a tape material or a patch for transdermal administration of a drug can be packaged.

  The user of the packaging bag first breaks the laminated film to the other end facing the weakened line near the notch using a notch (notch) formed at the edge of the packaging bag as a trigger. Next, the user of the packaging bag uses the notch formed at the other edge of the packaging bag as a trigger, and breaks the laminated film along the weakening line in the vicinity of the notch to the other opposite end. As a result, an opening is formed in the packaging bag, which is composed of broken lines formed along two weakening lines. Thereby, since the opening is opened widely, the user of the packaging bag can easily take out the contents from the opening.

International Publication No. 2015/105101

  However, in such a packaging bag, it may be difficult to form an unsealing opening due to the break line deviating from the weakening line. In particular, depending on how the force is applied, the breaking line may deviate from the weakening line. When reaching the edge adjacent to the edge where the notch is formed, a wide opening cannot be formed. As a result, there was a fear that the contents could not be taken out due to poor opening.

  This invention is made | formed in view of such a subject, and it aims at providing the packaging bag which suppresses the fear of the unseal | opening failure by a broken line not reaching the edge which opposes a notch.

  One aspect of the present invention for solving the above-described problem is a rectangular packaging bag in which a film is overlapped and at least three edges are sealed to form a housing portion, and one of the three edges is formed. A first weakening line that weakens the strength of the film and extends from the first edge, which is an edge, to the second edge that opposes the first edge through the housing portion; At the edge, a first notch is formed that triggers film breakage when the container is opened, and the first weakening line extends from the first notch to the second in a direction perpendicular to the first edge. Passes through a region sandwiched between a first straight line extending to the edge of the first edge and a third edge that is an edge close to the first notch among edges adjacent to the first edge. , A packaging bag.

  ADVANTAGE OF THE INVENTION According to this invention, the packaging bag which can provide the packaging bag which suppresses the possibility of the unseal | opening failure by a broken line not reaching the edge which opposes a notch can be provided.

The top view and side view of the packaging bag which concern on one Embodiment of this invention The figure explaining the formation position of the weakening line The top view of the packaging bag which concerns on the modification of this invention The top view of the packaging bag which concerns on the modification of this invention The top view of the packaging bag which concerns on the modification of this invention

  A packaging bag according to an embodiment of the present invention will be described with reference to the drawings. In the modified examples, the same or corresponding components are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 1 shows a plan view and a side view of a packaging bag 100 according to an embodiment of the present invention. The packaging bag 100 is a four-side sealed packaging bag including a housing portion 30 surrounded by a seal portion 20 formed by overlapping two rectangular films 10 and sealing four end edges 71 to 74. The packaging bag 100 further includes a first weakening line 41 and a second weakening line 42 formed on at least the accommodating portion 30 and weakening the strength of the film 10, and a first auxiliary weakening line 81 and a second auxiliary line. A weakening line 82 and a first notch 51 and a second notch 52 that are formed at any two locations of the end edges 71 to 74 and that trigger the breakage of the film 10 when the container 30 is opened are provided.

  In the following description, the edge on which the first notch 51 is formed is referred to as the first edge 71, and the edge opposite to the first edge 71 is referred to as the second edge 72 and the first edge 71. Of the adjacent edges, the edge close to the first notch 51 is referred to as a third edge 73, and the edge facing the third edge 73 is referred to as a fourth edge 74.

(the film)
The film 10 is formed in a rectangular shape, and the packaging bag 100 having the accommodating portion 30 can be formed by sealing the edges 71 to 74. In order to seal the edges 71 to 74 by heat sealing or the like, a multilayer film having two or more layers including a sealant layer as the innermost layer can be suitably used for the film 10. Examples of the material of the layer constituting the film 10 include polyethylene terephthalate (PET), aluminum (AL), cellophane, polyethylene (PE), transparent deposited PET, low-adsorption sealant (PET having heat sealability, cyclic polyolefin, EVOH Sealant etc.) can be used, and in the case of a multilayer film, these can be used in appropriate combination.

(notch)
The first notch 51 and the second notch 52 are cuts formed in the edges 71 to 74 of the packaging bag 100. The user of the packaging bag 100 can break the film 10 using the first notch 51 and the second notch 52 as an opening when the container 30 is opened. As shown in FIG. 1, the packaging bag 100 includes a first notch 51 formed at the first end edge 71 and a second notch 52 formed at the fourth end edge 74. Each of the first notch 51 and the second notch 52 is formed by cutting the seal portion 20 linearly over a predetermined length toward the opposing edges 71 to 74. The shape of the first notch 51 and the second notch 52 is not limited to a straight line as long as it triggers the breakage of the film 10, and a notch shape such as a triangle or a pentagon can be adopted.

(Weak line)
The first weakening line 41 and the second weakening line 42 are places where the strength of the film 10 is weakened linearly. The first weakening line 41 can prevent the break line from reaching the third end edge 73 on the side close to the first notch 51 among the end edges adjacent to the first end edge 71. Further, the second weakening line 42 can prevent the break line from reaching the second end edge 72 on the side close to the second notch 52 among the end edges adjacent to the fourth end edge 74. .

  In the packaging bag 100, the first weakening line 41 and the second weakening line 42 are formed on both the two films 10 so as to overlap each other in plan view when formed on the packaging bag 100. It may be formed on only one of the sheets of film 10.

  As shown in FIG. 1, the first weakening line 41 extends from the first end edge 71 to the second end edge 72 through the housing portion 30 and in a direction orthogonal to the first end edge 71. An imaginary first straight line 61 extending from the first notch 51 to the second edge 72, and an edge close to the first notch 51 among the edges adjacent to the first edge 71. It is formed so as to pass through a region sandwiched between a certain third end edge 73.

  In addition, the second weakening line 42 extends from the fourth end edge 74 to the third end edge 73 through the accommodating portion 30 and extends in the direction orthogonal to the fourth end edge 74. Is formed so as to pass through a region sandwiched between a second virtual edge 62 extending from the first edge 73 to the third edge 73 and the second edge 72.

  In FIG. 2, the enlarged view of the packaging bag 100 which demonstrates the formation position of the weakening line by making the 1st weakening line 41 into an example is shown. The minimum value (La) of the distance between the first weakening line 41 and the first straight line 61 is preferably 1 mm or more.

(Auxiliary weakening line)
The first auxiliary weakening line 81 and the second auxiliary weakening line 82 are portions where the strength of the film 10 is linearly weakened in the same manner as the first weakening line 41 and the second weakening line 42. The first auxiliary weakening line 81 and the second auxiliary weakening line 82 can prevent the breaking line triggered by the first notch 51 from reaching the fourth end edge 74 and the second notch. The break line triggered by 52 can be prevented from reaching the first edge 71.

  As shown in FIG. 1, the first auxiliary weakening line 81 intersects the first straight line 61 and is opposite to the third end edge 73 across the first notch 51 of the first end edge 71. And is connected to the first weakening line 41.

  In addition, the second auxiliary weakening line 82 intersects the second straight line 62 and extends from the first end 71 side of the fourth end 74 to the second notch 52, thereby causing the second weakening. It is formed so as to be connected to the line 42.

  The first weakening line 41, the second weakening line 42, the first auxiliary weakening line 81, and the second auxiliary weakening line 82 are formed by forming intermittent linear cuts (half cuts) in the film 10. can get. In the case where the film 10 is a laminated film, the first weakening line 41, the second weakening line 42, the first auxiliary weakening line 81, and the second weakening line 41 are provided by providing a cut through only the outermost layer of the laminated film. An auxiliary weakening line 82 can be formed. The first weakening line 41, the second weakening line 42, the first auxiliary weakening line 81, and the second auxiliary weakening line 82 can be formed by a method using a blade type such as a Thomson blade or a leather blade, A known method such as a method using a gas laser can be used.

(Function of weakening line)
Thus, by providing the 1st weakening line 41 and the 2nd weakening line 42 in the packaging bag 100, the edge which the fracture | rupture line formed triggered by the 1st notch 51 or the 2nd notch 52 opposes When going to the third end edge 73 or the second end edge 72 without going to, the break line can reach the first weakening line 41 or the second weakening line 42. Furthermore, by providing the first auxiliary weakening line 81 and the second auxiliary weakening line 82, it is possible to prevent a break line triggered by the first notch 51 from reaching the fourth end edge 74. The breaking line triggered by the second notch 52 can be prevented from reaching the first end edge 71.

  The break line that has reached the first weakening line 41 or the second weakening line 42 proceeds along the first weakening line 41 or the second weakening line 42. Here, the first weakening line 41 is formed by extending from the first end edge 71 to the second end edge 72 through the accommodating portion 30. Further, the second weakening line 42 is formed to extend from the fourth end edge 74 to the third end edge 73 through the accommodating portion 30. For this reason, the breaking line that has reached the first weakening line 41 or the second weakening line 42 follows the first weakening line 41 or the second weakening line 42, so that the first notch 51 or the second notch It is possible to proceed to the second edge 72 or the third edge 73 which is the edge opposite to the edge formed with 52.

  As described above, the packaging bag 100 includes the first weakening line 41, thereby preventing the breaking line triggered by the first notch 51 from reaching the third edge 73 and the second. Can be guided to reach the edge 72. Similarly, by providing the second weakening line 42, it is possible to prevent the fracture line triggered by the second notch 52 from reaching the second end edge 72, and the third end. It can be guided to reach the edge 73. Therefore, according to the packaging bag 100, it is possible to suppress the possibility of unsuccessful opening due to the break line not reaching the edges facing the first notch 51 and the second notch. Further, by providing the first weakening line 41 and the second weakening line 42 corresponding to the first notch 51 and the second notch 52, the unsealing property in the biaxial direction can be improved.

  Further, each of the first weakening line 41 and the second weakening line 42 is formed so as to have an interval of 1 mm or more from the first straight line 61 or the second straight line 62, so that the first notch 51 or When the film 10 is started to break by using the second notch 52 as a trigger, it is possible to prevent the break line from getting over the first weakening line 41 or the second weakening line 42 due to momentum.

(Modification)
The first weakening line 41 and the second weakening line 42 may be curved instead of linear. FIG. 3 shows a packaging bag 101 according to a modified example in which the first weakening line 41 and the second weakening line 42 are formed by curves.

  The shape of the 1st weakening line 41 and the 2nd weakening line 42 is not limited to the perforation comprised by an intermittent cut, if the intensity | strength of the film 10 can be weakened linearly. FIG. 4 shows a packaging bag 102 according to a modification in which the first weakening line 41 and the second weakening line 42 are formed by arranging two straight lines each formed by intermittently forming a linear half cut. . Further, in FIG. 5, the first weakening line 41 and the second weakening line 42 are formed as eight-character perforations in which a plurality of sets of two fine cuts that are eight-shaped are arranged in a line. The packaging bag 103 which concerns on the modified example is shown. In addition to this, the first weakening line 41 and the second weakening line 42 may have a shape such as a straight line or a multiple line in which a plurality of straight lines are arranged.

  Although the packaging bag 100 is a four-side sealed bag, the packaging bag is not limited to a four-side sealed bag as long as the packaging bag is a rectangular packaging bag in which at least three end edges are sealed to form an accommodation portion. As the packaging bag, for example, a three-side sealed bag in which one rectangular laminated film is folded in two and the combined edges are sealed may be used. Moreover, you may use the four-sided sealing bag which made one rectangular laminated film into two, and was made into four edges.

  Although the packaging bag 100 is formed with the first weakening line 41 and the second weakening line 42 one by one, any one weakening line may be used. Further, the first auxiliary weakening line 81 and the second auxiliary weakening line 82 are not essential.

  The packaging bag which concerns on an Example and a comparative example was manufactured, and the openability of each packaging bag was evaluated using these. The packaging bag which concerns on an Example was manufactured by changing the weakening line formation position (space | interval La) and the weakening line shape of the packaging bag 100 shown in FIG. The packaging bag according to the comparative example is formed so that the weakening line of the packaging bag 100 is in contact with a virtual straight line extending from the notch (Comparative Examples 1 to 3, Comparative Examples 5 to 11), or extends from the notch. About the virtual straight line, it formed in the area | region symmetrical with the area | region in which the weakening line of the packaging bag based on an Example was formed (comparative example 4). In both the example and the comparative example, as in the packaging bag 100, two weakening lines are formed so as to be symmetric with respect to a diagonal line starting from an angle at which two end edges formed with two notches are in contact with each other. (First and second weakening lines).

As the packaging bags according to all the examples and comparative examples, all the films using the films having the following layer structures in order from the outermost layer to the innermost layer were prepared.
(1) Polyethylene terephthalate (PET) (12 μm) / Aluminum (AL) (7 μm) / PET having heat sealability (20 to 50 μm)
(2) Cellophane (# 300 to 500) / AL (7 μm) / PET having heat sealability (20 to 50 μm)
(3) PET (12 μm) / AL (9 μm) / Polyethylene (PE) (20-50 μm)
(4) PET (12 μm) / PE (10-30 μm) / AL (7 μm) / PE (10-40 μm)
(5) Cellophane (# 300-500) / PE (10-30 μm) / AL (7 μm) / PE (10-40 μm)
(6) PET (12 μm) / PET having heat sealability (10 to 50 μm)
(7) Transparent vapor-deposited PET (12 μm) / PET having heat sealability (10 to 50 μm)
(8) PET (12 μm) / PE (10-50 μm)

  After the film was cut into a rectangular shape corresponding to the dimensions of the packaging bag described later, weakening lines were formed on the film surface. Thereafter, two films having weakened lines were prepared, and these were overlapped so that the innermost layers (sealant layers) faced each other, and then the four edges were sealed. The seal width (Ls in FIG. 5) was 5 mm. Finally, a linear notch was formed in the seal portion to form a packaging bag. The notch was formed at a position where the distance (Ln in FIG. 5) from the corner of the packaging bag where adjacent edges contact each other was 10 mm.

  The manufactured packaging bag was evaluated for opening performance when the first and second notches were used as a trigger. At the time of opening, the film was ruptured while applying a load in the direction in which the breaking line is an edge adjacent to the edge where the notch was formed and formed toward the edge close to the notch. In Table 1, the dimensions of each packaging bag according to Examples 1 to 14 and Comparative Examples 1 to 11, the minimum value La of the interval between the first and second weakening lines and the virtual straight line extending from the notch, the weakening line , The presence or absence of auxiliary weakening lines, and evaluation results (openability). In addition, when the minimum value La of a space | interval is a positive value, it shows that the weakening line is above the 1st straight line 51 in FIG. 2, and when it is a negative value, it shows that it exists below.

  In the evaluation results, in all the samples, the packaging bag in which the breaking line reached from the notch to the opposite edge was indicated by “+” as having sufficient openability. In addition, in all samples, the break line does not reach the edge opposite to the edge where the notch is formed, and if the opening failure occurs, “−” is assumed as having no opening property. Indicated.

  In the packaging bags according to Examples 1 to 14, the weakening line is sandwiched between a virtual straight line extending from the notch and an end edge close to the notch among the end edges adjacent to the notched end edge. It is formed so as to pass through the accommodating portion. For this reason, even when the break line is formed toward the edge close to the notch among the edges adjacent to the edge where the notch is formed, the break line is quickly reached to the weakening line, It was possible to guide the forming direction to the edge opposite to the notch. Therefore, as shown in Table 1, it has confirmed that the packaging bag which concerns on Examples 1-14 has sufficient openability. The same results were obtained regardless of the layer configuration and thickness of all films.

  On the other hand, in the packaging bags according to Comparative Examples 1 to 11, in at least one of the first and second weakening lines, an unsuccessful opening in which the break line could not reach from the notch to the opposite edge occurred. Specifically, in Comparative Example 2 and Comparative Example 8, unsuccessful opening occurred because the break line deviated from the first weakening line formed on the straight line extending from the notch. Moreover, also in Comparative Example 3 and Comparative Example 10, unsuccessful opening occurred because the break line deviated from the second weakening line formed on the straight line extending from the notch. In the other comparative examples, in both the first and second weakening lines, unsuccessful opening occurred due to the break line coming off the weakening line.

  In addition, about the packaging bag which concerns on Examples 1-14, the packaging bag which formed only any one of the 1st and 2nd weakening line was created further, and opening property evaluation was performed. As a result, even when only one of the first weakening line and the second weakening line was formed, the same results as the packaging bags according to Examples 1 to 14 shown in Table 1 were obtained.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for packaging sheet-like contents such as tape materials and patches for transdermal administration of drugs.

100 to 103 Packaging bag 10 Film 20 Seal portion 30 Storage portion 41 First weakening line 42 Second weakening line 51 First notch 52 Second notch 61 Virtual first straight line 62 Virtual second Straight line 71 First edge 72 Second edge 73 Third edge 74 Fourth edge 81 First auxiliary weakening line 82 Second auxiliary weakening line

Claims (4)

A rectangular packaging bag in which films are superimposed and at least three edges are sealed to form a container,
Stretching from the first edge, which is one of the three edges, to the second edge facing the first edge through the housing portion, weakens the strength of the film The first weakened line,
At the first edge, a first notch is formed that triggers the film breakage when opening the housing portion;
The first weakening line is
A first straight line extending from the first notch to the second edge in a direction orthogonal to the first edge, and the first edge among the edges adjacent to the first edge. The packaging bag which passes through the area | region pinched | interposed into the 3rd edge which is an edge near the notch. Strength of the film extending from the fourth edge, which is one of the three edges, facing the third edge, to the third edge through the housing portion A second weakening line weakening
In the fourth edge, a second notch that triggers the film breakage when opening the housing portion is further formed,
The second weakening line is
Passing through a region sandwiched between the second straight line extending from the second notch to the third edge and the second edge in a direction orthogonal to the fourth edge. Item 15. A packaging bag according to item 1.   The laminated layer that intersects the first straight line and extends from the opposite side of the third end edge across the first notch of the first end edge to connect to the first weakening line The packaging bag according to claim 1 or 2, further comprising a first auxiliary weakening line that weakens the strength of the film.   The strength of the laminated film that intersects the second straight line and extends from the first edge side than the second notch of the fourth edge and connects to the second weakening line. The packaging bag according to claim 2, further comprising a weakened second auxiliary weakening line.

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