JP2019001523A - Packaging bag - Google Patents

Abstract

To provide a packaging bag capable of suppressing a risk of problem in opening due to a break line not reaching an end edge opposite to a notch and allowing low accuracy in a position to form the notch that triggers the break line.SOLUTION: A rectangle packaging bag formed with films layered and having at least three edges sealed to form a storage part includes a first weakened line at which strength of the films is weakened in at least storage part and a first notch to trigger breakage of the films at a first end edge that is one of the three edges when the storage part is opened. The first weakened line elongates so as to come closer to a third end edge that is an end edge closer to the first notch among end edges neighbouring the first end edge as going from the first end edge to a second end edge opposite to the first end edge, and intersects with a first line elongating in a direction orthogonal to the first end edge from the first notch to the second 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.

  Moreover, in such a packaging bag, since the notch is formed so as to be in contact with the end of the weakening line, processing with high processing accuracy is required, and it may be difficult to stably produce the packaging bag. .

  The present invention has been made in view of such a problem, and suppresses the possibility of poor opening due to the break line not reaching the edge facing the notch, and the notch formation position that triggers the break line. It aims at providing the packaging bag which can ease a precision.

  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 storage portion, and at least on the storage portion, the strength of the film And a first notch that triggers film breakage when the container is opened at the first edge that is one of the three edges. The first weakening line is formed so that the first notch of the first edge is adjacent to the first notch as it goes from the first edge toward the second edge opposite to the first edge. A first straight line extending from the first notch to the second edge in a direction orthogonal to the first end edge, while extending so as to approach the third end edge, which is the end edge closer to It is a packaging bag including the part which cross | intersects.

  According to the present invention, there is provided a packaging bag capable of suppressing the possibility of poor opening due to the break line not reaching the edge facing the notch and relaxing the accuracy of the notch formation position that triggers the break line. 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 is further formed on at least two locations of the first weakening line 41 and the second weakening line 42 that are formed on at least the accommodating portion 30 and weaken the strength of the film 10 and the edges 71 to 74. The first notch 51 and the second notch 52 are provided to trigger the breakage of the film 10 when the accommodating portion 30 is opened.

  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 toward the second end edge 72 so as to approach the third end edge 73, and the first end line 71 A gentle curve intersecting a virtual first straight line 61 extending from the first notch 51 to the second edge 72 in a direction orthogonal to the edge 71, and the second edge 72 side of this curve And a curved line extending substantially in parallel with the third end edge 73 from the end portion toward the second end edge 72.

  The second weakening line 42 extends from the fourth end edge 74 toward the third end edge 73 so as to approach the second end edge 72 and is orthogonal to the fourth end edge 74. A gradual curve intersecting an imaginary second straight line 62 extending from the second notch 52 to the third edge 73 in the direction, and a third curve from the end on the fourth edge 74 side of the curve. It is comprised by the curve extended | stretched substantially parallel to the 2nd edge 72 toward the edge 73 of this.

  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 first weakening line 41 is preferably formed so that the distances (La1, La2) from the first straight line 61 of each of the two ends are 1 mm or more. By forming the first weakening line 41 in this way, the first weakening line 41 can have a width as seen from the first notch 51. Therefore, even if the direction in which the break line is formed is not parallel to the first straight line 61 and goes to the third end edge 73 or the fourth end edge 74, the break line becomes the first weakening line 41. The direction in which the rupture line is formed can be guided to the second edge 72.

  The first weakening line 41 and the second weakening line 42 are obtained by forming intermittent linear cuts (half cuts) in the film 10. When the film 10 is a laminated film, the 1st weakening line 41 and the 2nd weakening line 42 can be formed by providing the cut | interruption penetrated only to the outermost layer of the laminated film. For the formation of the first weakening line 41 and the second weakening line 42, a known method such as a method using a blade type such as a Thomson blade or a leather blade or a method using a carbon dioxide gas laser can be used. .

(Function of weakening line)
In this way, the first weakening line 41 and the second weakening line 42 of the packaging bag 100 are formed so as to include portions intersecting with the first straight line 61 or the second straight line 62, respectively. Even when the direction of formation of the break line formed using the notch 51 or the second notch 52 as a trigger is not parallel to the first straight line 61 or the second straight line 62, the first line immediately after the start of breakage. The weakening line 41 or the second weakening line 42 can be reached.

  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 to extend toward the second end edge 72. The second weakening line 42 is formed to extend toward the third end edge 73. For this reason, the breaking line that has reached the first weakening line 41 or the second weakening line 42 follows the first end line 72 or the third weakening line 42 along the first weakening line 41 or the second weakening line 42. It is possible to proceed to the vicinity of the edge 73.

  As described above, the packaging bag 100 includes the first weakening line 41 so that the breaking line triggered by the first notch 51 reaches the third edge 73 and the fourth edge 4. This can be prevented, and can be guided to reach the vicinity of the second edge 72. Moreover, the packaging bag 100 is provided with the 2nd weakening line 42, and prevents the broken line triggered by the 2nd notch 52 from reaching the 1st edge 71 or the 2nd edge 72. And can be guided to reach the vicinity of the third 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 52. 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, the first weakening line 41 and the second weakening line 42 of the packaging bag 100 are formed so as to intersect the first straight line 61 or the second straight line 62. For this reason, the 1st weakening line 41 and the 2nd weakening line 42 have a width seeing from the 1st notch 51 with respect to the formation direction of a fracture line. For this reason, the first notch 51 and the second notch 52 can also be provided with a margin in the first notch 51 and the second notch 52. Therefore, the accuracy of the notch formation position can be reduced as compared with the packaging bag according to the prior art in which the notch is formed so as to be in contact with the end of the weakening line.

(Modification)
The first weakening line 41 and the second weakening line 42 may be straight lines instead of gentle curves. 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 straight lines.

  The 1st weakening line 41 and the 2nd weakening line 42 should just be formed on the accommodating part 30, and the edge part of the 1st weakening line 41 and the 2nd weakening line 42 is an end of the packaging bag 30. You may form so that the edges 71-74 may be touched. FIG. 4 shows a packaging bag 102 according to a modification in which the ends of the first weakening line 41 and the second weakening line 42 are formed so as to contact the edge of the packaging bag.

  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. In FIG. 5, the shape of the first weakening line 41 and the second weakening line 42 is formed as an eight-shaped perforation 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 a modification 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.

  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 and weakening line shape of the packaging bag 100 shown in FIG. The packaging bag which concerns on a comparative example forms the weakening line of the packaging bag 100 in the position which does not cross | intersect the virtual straight line extended from a notch (comparative examples 1-9), or weakening of an Example regarding a virtual straight line It was formed so as to have a symmetrical shape with respect to the line (Comparative Examples 10 and 11). In both the example and the comparative example, as in the packaging bag 100, the weakening line is 2 so that it is symmetric with respect to the diagonal line starting from the angle at which the two edges formed with the two notches are in contact with each other. This was formed (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. 2) 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. 2) 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. In Table 1, the dimension of each packaging bag which concerns on Examples 1-14 and Comparative Examples 1-11, position La1 and La2 of the edge part of a weakening line, the shape of a weakening line, and the evaluation result (opening property) were shown. In addition, when the position La1 and La2 of an edge part is a positive value, it has shown that an edge part is upwards rather than the 1st straight line 51 in FIG. 2, and in the case of a negative value, from the 1st straight line 51 Indicates that it is also below.

  In the evaluation results, in all the samples, the packaging bag in which the break 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 addition, when some samples were found to have unsealability and other samples were unsealable, they were shown as “+” as having unsealability, although the unsealability was insufficient.

  In the packaging bags according to Examples 1 to 14, since the first and second weakening lines can have a width as viewed from the notch with respect to the direction in which the breaking line is formed, the direction in which the breaking line is formed is Even if it is not parallel to a straight line extending from the notch to the opposite edge, the break line can quickly reach the first or second weakening line, and the break line reaches the opposite edge from the notch. I was able to. From this result, 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 some of the films, unsuccessful opening occurred in which the break line could not reach from the notch to the opposite edge. Specifically, in Comparative Example 1, Comparative Examples 3-7, and Comparative Examples 9-11, the first and second weakening lines cannot be given a width with respect to the direction in which the fracture line is formed. When the direction in which the break line was formed was not parallel to the straight line extending from the notch to the opposite edge, the break line could not reach the first and second weakening lines promptly. For this reason, the break line could not reach from the notch to the opposite edge, resulting in poor opening. The same results were obtained regardless of the layer configuration and thickness of all films.

  In Comparative Example 2 and Comparative Example 8, the first and second weakening lines do not have a width with respect to the direction in which the break line is formed, but the break line is adjacent to the edge where the notch is formed. Since it is possible to prevent the edge from approaching the edge close to the notch, it was possible to prevent unsuccessful opening of some samples.

  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

Claims (2)

A rectangular packaging bag in which films are superimposed and at least three edges are sealed to form a container,
At least on the housing part, a first weakening line that weakens the strength of the film;
In the first edge which is one of the three edges, a first notch that triggers the film breakage when the container is opened is formed,
The first weakening line is
An edge closer to the first notch among edges adjacent to the first edge as it goes from the first edge toward the second edge opposite to the first edge. The first straight line extending from the first notch to the second end edge in a direction orthogonal to the first end edge. A packaging bag, including parts. At least on the housing portion, a second weakening line weakening the strength of the film;
A second notch that triggers the film breakage when the container is opened at a fourth edge, which is one of the three edges, facing the third edge. And further formed,
The second weakening line is
Extending from the fourth end edge toward the third end edge so as to approach the second end edge, and extending from the second notch in a direction perpendicular to the fourth end edge. The packaging bag of Claim 1 containing the part which cross | intersects the 2nd straight line extended | stretched to a 3rd edge.

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