Packaging bags

Abstract

To provide a packaging bag capable of achieving both unsealing property and barrier property.SOLUTION: There is provided a packaging bag which has a rectangular shape and has a storage part formed by overlapping films and sealing end edges to each other. The packaging bag has a first weakened line, a second weakened line, and a notch formed on a first end edge which is one of the three end edges. The first weakened line includes a first curved line portion, a first straight line portion, and a first slant line portion. The second weakened line includes a second curved line portion, a second straight line portion, and a second slant line portion. The first slant line portion and the second slant line portion do not intersect with a base line, and an extended line of the first slant line portion and an extended line of the second slant line portion intersect on the base line.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging bag. [Background technology]

[0002] Known packaging bags include three-sided sealed bags made by folding a sheet of rectangular laminated film in half and sealing the joined edges to form a storage section, and four-sided sealed bags made by overlapping a set of rectangular laminated films on top of each other and then sealing the edges to form a storage section.

[0003] Patent Document 1 discloses a packaging bag in which the front and back portions are opposed to each other and the top, both side portions and bottom portion are sealed. The front and back portions are respectively formed with a front cut portion and a back cut portion consisting of half-cut lines. The front cut portion and the back cut portion overlap each other at both ends when viewed from above, and the central portions are formed at different positions in the vertical direction. This creates a difference in the cut position between the front film and the back film, making it easier to separate the two films and improving the ease of opening and closing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-019563 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, there are cases where both ends of the front cut portion and the back cut portion do not overlap due to variations during manufacturing. In particular, if the front cut portion and the back cut portion at the end of the break are misaligned vertically and cross each other when viewed from above, the break portion may become twisted and become a snag when opening the bag, making it difficult to open. In addition, as in the packaging bag of Reference 1, if the front cut portion and the back cut portion extend to the sealed portion of the packaging bag, cracks may occur in the aluminum layer during transportation or handling, which may impair the barrier properties.

[0006] The present invention has been made in consideration of such problems, and has an object to provide a packaging bag that is compatible with both easy opening and barrier properties. [Means for solving the problem]

[0007] One aspect of the present invention for solving the above problem is a rectangular packaging bag in which a storage section is formed by overlapping rectangular films and sealing at least a first edge, a second edge opposite the first edge, and a third edge adjacent to the first edge and the second edge, the rectangular packaging bag having a first weakened line that linearly weakens the strength of one of the overlapped films on the storage section, a second weakened line that linearly weakens the strength of the other of the overlapped films, and a notch formed on the first edge. The first weakened line includes a first straight line portion extending from the notch in parallel to a reference line extending in a direction perpendicular to the extension direction of the first edge, a first curved portion extending from an end of the first straight line portion on the first edge side toward the first edge and intersecting the reference line, and a first oblique line portion extending from an end of the first straight line portion on the second edge side toward the second edge and the reference line. The second weakened line includes a second straight line portion extending parallel to the reference line, and a first curved portion extending from an end of the second straight line portion on the first edge side toward the first edge and intersecting the reference line. and the first curved portion a second curved portion intersecting with the first curved portion; 2and a second oblique line portion extending from an end portion of the straight portion on the second edge side toward the second edge and the reference line, the first oblique line portion and the second oblique line portion do not intersect with the reference line, an extension line of the first oblique line portion and an extension line of the second oblique line portion intersect on the reference line, a first distance between an end portion of the first oblique line portion on the second edge side and an end portion of the second oblique line portion on the second edge side is 1 mm or more and 8 mm or less, a second distance between the intersection of the extension of the oblique line portion and the seal portion formed on the second edge is 1 mm or more and 10 mm or less. Effect of the Invention

[0008] According to the present invention, it is possible to provide a packaging bag that is capable of achieving both easy opening and barrier properties. [Brief description of the drawings]

[0009] [Figure 1] 1A and 1B are plan and side views of a packaging bag according to an embodiment of the present invention; [Diagram 2] An enlarged view of part A enclosed by a dotted line in Figure 1. [Diagram 3] An enlarged view of part B enclosed by a dotted line in Figure 1. [Figure 4] FIG. 1 is a plan view illustrating a method of using a packaging bag according to an embodiment of the present invention. [Diagram 5] An enlarged view of part B enclosed by a dotted line in Figure 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A packaging bag according to an embodiment of the present invention will be described with reference to the drawings.

[0011] FIG. 1 is a plan view and a side view of a packaging bag 100 according to one embodiment of the present invention, FIG. 2 is an enlarged view of part A surrounded by a dotted line in FIG. 1, FIG. 3 is an enlarged view of part B surrounded by a dotted line in FIG. 1, and FIG. 4 is a plan view explaining how to use the packaging bag 100.

[0012] The packaging bag 100 is a four-sided sealed packaging bag having a storage section 30 surrounded by edges 71-74, which are the sealed section 20 formed by overlapping two rectangular films 10 and sealing the four edges 71-74 over a predetermined width. The packaging bag 100 has a first weakened line 41 and a second weakened line 42 that linearly weaken the strength of the two overlapped films 10 on the storage section 30, and a notch 51 formed on the edge 71 that serves as a trigger for breaking the film 10 when opening the storage section 30. The notch 51 is used as a trigger to at least partially break the film 10 to form an opening in the packaging bag 100, allowing the contents stored in the storage section 30 to be taken out.

[0013] In the following, the edge on which the notch 51 is formed is referred to as a first edge 71, the edge opposite the first edge 71 is referred to as a second edge 72, the edge adjacent to the first edge 71 that is closer to the notch 51 is referred to as a third edge 73, and the edge opposite the third edge 73 is referred to as a fourth edge 74. For convenience, as shown by the arrow in Fig. 1, a direction perpendicular to the extension direction of the first edge 71 toward the second edge 72 is defined as a first direction, and a direction perpendicular to the first direction from the third edge 73 toward the fourth edge 74 is defined as a second direction.

[0014] (film) The film 10 is a film material formed in a rectangular shape and used to form a packaging bag 100 having a storage section 30 by sealing the edges. A multilayer film having two or more layers and a sealant layer as the innermost layer can be preferably used for the film 10 in order to seal the edges 71 to 74 by heat sealing or the like. Examples of materials that can be used for the layers constituting the film 10 include polyethylene terephthalate (PET), aluminum (AL), cellophane, polyethylene (PE), transparent vapor-deposited PET, low-adsorption sealant (PET with heat sealability (HS-PET), cyclic polyolefin, EVOH sealant, etc.), and in the case of a multilayer film, these can be used in appropriate combination. The width of the film 10 in the first direction is preferably 45 mm or more in order to appropriately form a step by hand, which will be described later.

[0015] Examples of the layer structure of the film 10, from the outermost layer to the innermost layer when the packaging bag 100 is formed, are PET (12 μm) / AL (7-20 μm) / HS-PET (20-50 μm), PET (12 μm) / AL (7-20 μm) / PE (10-30 μm) / PCO (10-30 μm), cellophane / AL (7-20 μm) / HS-PET (20-50 μm), and cellophane / AL (7-20 μm). Examples of the usable configurations include AL (7-20 μm) / PE (10-30 μm) / PCO (10-30 μm), PET (12 μm) / AL (7-20 μm) / PE (20-50 μm), PET (12 μm) / PE (10-30 μm) / AL (7-20 μm) / PE (10-40 μm), cellophane / PE (10-30 μm) / AL (7 μm) / PE (10-40 μm), etc. In the above examples, the first weakened line 41 and the second weakened line 42 can be formed in the outermost layer.

[0016] (notch) Notch 51 is a cut formed in first edge 71 of packaging bag 100. When opening storage section 30, a user of packaging bag 100 can start breaking film 10 using notch 51 as a trigger. Notch 51 is formed by cutting first edge 71 linearly over a predetermined length toward opposing second edge 72. The shape of notch 51 is not limited to a linear shape as long as it triggers breaking of film 10, and cutout shapes such as a triangle or pentagon can be used.

[0017] (weakening line) The first weakened line 41 and the second weakened line 42 are formed by linearly weakening the strength of the two overlapping films 10 in a predetermined positional relationship. Although details will be described later, the packaging bag 100 can be opened by causing a breakage triggered by the notch 51 to proceed along the first weakened line 41 and the second weakened line 42. The first weakened line 41 includes a first curved portion 41a, a first straight portion 41b, and a first oblique line portion 41c. The second weakened line 42 includes a second curved portion 42a, a second straight portion 42b, and a second oblique line portion 42c. The first weakened line 41 is formed in the film 10 on the front side of the plane of the plan view of FIG. 1, and the second weakened line 42 is formed in the film 10 on the back side of the plane of the plan view of FIG. 1.

[0018] The first curved portion 41a is an arc-shaped curve that connects one end 41a' that is located a predetermined distance a away from the first edge 71 in the first direction to the other end 41a'' that is located a predetermined distance b away from the one end 41a' in the first direction and a predetermined distance away from the one end 41a' in the second direction, and protrudes toward the first edge 71. The first straight portion 41b is a straight line that extends a predetermined length in the first direction from the other end 41a'' of the first curved portion 41a and extends parallel to a reference line 80. The reference line 80 is an imaginary straight line that extends from the notch 51 in a direction perpendicular to the extension direction of the first edge 71 (a direction parallel to the third edge 73 and the fourth edge 74). The first oblique line portion 41c is a line that extends from the end portion of the first straight portion 41b on the second edge 72 side toward the second edge 72 and the reference line 80.

[0019] The second curved portion 42a is an arc-shaped curve that connects one end 42a' located at a position a predetermined distance a away from the first edge 71 in the first direction and the other end 42a'' located at a position a predetermined distance b away from the one end 42a' in the first direction and a predetermined distance away from the one end 42a' in the direction opposite to the second direction, and protrudes toward the first edge 71. The second straight portion 42b is a straight line that extends a predetermined length in the first direction from the other end 42a'' of the second curved portion 42a and extends parallel to the reference line 80. The second oblique line portion 42c is a line that extends from the end of the second straight portion 42b on the second edge 72 side toward the second edge 72 and the reference line 80.

[0020] The first curved portion 41a and the second curved portion 42a are formed so as to intersect each other and also intersect the reference line 80 in a plan view of the overlapped films 10. Moreover, the first straight portion 41b and the second straight portion 42b are formed so as to be spaced apart by a predetermined distance c in the second direction.

[0021] As an example, the predetermined distance a may be greater than 1 mm and less than 15 mm, the predetermined distance b may be greater than 1 mm and less than 20 mm, and the predetermined distance c may be greater than 1 mm and less than 15 mm.

[0022] Although details will be described later, it is preferable that the intersection between first curved portion 41a and second curved portion 42a is located on reference line 80 extending from first notch 51 in the first direction. Furthermore, it is preferable that the curvature of both first curved portion 41a and second curved portion 42a changes continuously, and the direction of the tangent at the other end 41a'', 42a'' is the first direction.

[0023] The first oblique line portion 41c and the second oblique line portion 42c do not intersect with the reference line 80 in a plan view of the overlapped film 10. The extension line 41d of the first oblique line portion 41c and the extension line 42d of the second oblique line portion 42c are formed so as to intersect with each other and also intersect on the reference line 80. The extension lines 41d and 42d are imaginary extensions of the first oblique line portion 41c and the second oblique line portion 42c. The intersection of the extension line 41d and the extension line 42d is defined as an intersection point x. The shape of the first oblique line portion 41c and the second oblique line portion 42c may be a straight line or a curved line as shown in FIG. 3. If the curved line is gentle, the oblique line portion is less likely to become a bone when the original roll of the film 10 is wound into a long length.

[0024] A first distance d in the second direction between an end 41c' of the first oblique line portion 41c on the second edge 72 side and an end 42c' of the second oblique line portion 42c on the second edge 72 side is 1 mm or more and 8 mm or less, and more preferably, the first distance d is 2 mm or more and 6 mm or less. A second distance e in the first direction between the intersection x and the seal portion 20 formed on the second edge 72 is 1 mm or more and 10 mm or less, and more preferably, the second distance e is 4 mm or more and 7 mm or less.

[0025] The first weakened line 41 and the second weakened line 42 can be obtained, for example, by forming intermittent linear cuts (half cuts) in the film 10. In order to facilitate breaking, when the film 10 is a laminated film, it is preferable that the cuts are provided in the stretched base layer that does not have cuttability except for the aluminum layer. The first weakened line 41 and the second weakened line 42 can be formed by a known method such as a blade type such as a Thomson blade or a razor blade, or a carbon dioxide laser.

[0026] (Weakened line function) In the packaging bag 100 having the first weakened line 41 and the second weakened line 42, by applying a force to the notch 51, a break can be generated at the first edge 71, triggered by the notch 51. The break progresses from the first edge 71 in a first direction by applying a force to the packaging bag 100 that shears the film 10 along the reference line 80. Then, the break can progress a predetermined distance from the first edge 71 to reach at least either the first curved portion 41a or the second curved portion 42a.

[0027] By continuing to apply force to the packaging bag 100, the break progresses along the first curved portion 41a to the other end 41a'', as shown by the black arrow in FIG. 4, and then progresses along the first straight portion 41b to the end of the first straight portion 41b on the second edge 72 side. The break then progresses along the first oblique line portion 41c to the end 41c' of the first oblique line portion 41c. Similarly, the break that has reached the second curved portion 42a progresses along the second curved portion 42a to the other end 42a'', and then progresses along the second straight portion 42b to the end of the second straight portion 42b on the second edge 72 side. The break then progresses along the second oblique line portion 42c to the end 42c' of the second oblique line portion 42c.

[0028] The breaks that have progressed to the ends 41c' and 42c' proceed approximately along the extension lines 41d and 42d, and intersect at or near the intersection point x on the reference line 80. The breaks then proceed to the second edge 72.

[0029] 4, an opening surrounded by the cut surfaces of the first weakened line 41 and the second weakened line 42 is formed in the packaging bag 100. As described above, the first straight line portion 41b and the second straight line portion 42b are formed at a predetermined distance c from each other, so that a step (gap) of a predetermined width W is formed in the second direction between the respective cut surfaces in a plan view. This step allows the opening formed by pulling the two films 10 apart from each other to be opened wide, making it easy to remove the contents.

[0030] In particular, since the predetermined distance a is greater than 1 mm, the first weakened line 41 and the second weakened line 42 can prevent a decrease in strength of the first edge 71, and can also prevent the weakened lines from partially breaking and causing microcracks due to tensile stress generated at the end of the storage section 30 on the side of the sealed section 20 when the sealed section 20 is formed by heat sealing. Furthermore, since the predetermined distance a is less than 15 mm, breakage triggered by the first notch 51 can be made to quickly reach the first curved section 41a and the second curved section 42a.

[0031] In addition, since the predetermined distance b is greater than 1 mm, it is possible to prevent the first curved portion 41a and the second curved portion 42a from changing suddenly in the first direction, thereby preventing the break from deviating from the first weakened line 41 and the second weakened line 42. Furthermore, since the predetermined distance b is smaller than 20 mm, it is possible to ensure a wide region in which the step width W is large across the first direction.

[0032] In addition, because the predetermined distance c is greater than 1 mm, the width W of the step formed upon opening can be made large enough to allow a human hand to easily pull the two sheets of film 10 apart from each other. Furthermore, because the predetermined distance c is smaller than 15 mm, it is possible to prevent the width W of the step from becoming too large and requiring a large force to cause the breakage to proceed.

[0033] Furthermore, since the first curved portion 41a and the second curved portion 42a are formed so as to intersect with each other when viewed in a plane of the film 10 and also to intersect with the reference line 80, a breakage that occurs due to the notch 51 can quickly reach at least one of the first curved portion 41a and the second curved portion 42a.

[0034] Furthermore, since both the first curved portion 41a and the second curved portion 42a are arc-shaped curves protruding toward the first edge 71, the break can proceed smoothly from the first curved portion 41a and the second curved portion 42a, respectively, to the first straight portion 41b and the second straight portion 42b, and deviation from the first weakened line 41 and the second weakened line 42 can be prevented.

[0035] Furthermore, by forming the intersection between the first curved portion 41a and the second curved portion 42a to be located on the reference line 80, the break can reach the first curved portion 41a and the second curved portion 42a simultaneously, allowing the break to proceed smoothly.

[0036] It is also preferable that the curvature of both the first curved portion 41a and the second curved portion 42a changes continuously, and that the direction of the tangent at the other end 41a'', 42a'' of each is the first direction. This allows the fracture that progresses along the first curved portion 41a and the second curved portion 42a to progress smoothly to the first straight portion 41b and the second straight portion 42b, respectively.

[0037] In addition, since the first distance d between the end 41c' of the first oblique line portion 41c and the end 42c' of the second oblique line portion 42c is 1 mm or more, it is possible to suppress the intersection x from shifting from the reference line 80 due to manufacturing variations. For example, the first weakened line 41 and the second weakened line 42 may relatively shift in the vertical direction by up to about ±1 mm due to bag manufacturing variations. When the first weakened line 41 and the second weakened line 42 shift in a direction approaching each other, the intersection x shifts from the reference line 80 or shifts in a direction approaching the first edge 71. If the first distance d is less than 1 mm, when a shift of about 1 mm occurs, the break of the front and back films 10 may be twisted and caught when opening, making it difficult to open. Therefore, by setting the first distance d to 1 mm or more, the packaging bag 100 is less susceptible to the effects of bag manufacturing variations, and openability is ensured. Furthermore, since the first distance d is 8 mm or less, it is possible to prevent the breaks in the front and back films 10 from intersecting at a large deviation from the intersection point x, which can prevent the breaks in the front and back films 10 from being twisted and getting caught when opening the package. It is more preferable that the first distance d is 2 mm or more and 6 mm or less.

[0038] In addition, since the second distance e in the first direction between the intersection point x and the seal portion 20 formed on the second edge 72 is 1 mm or more, the distance from the second edge 72 to the weakened line can be sufficiently secured, and the occurrence of aluminum cracks in the film 10 due to shock during transportation, etc. can be suppressed. Furthermore, since it is 10 mm or less, the breaks after the end 41c' of the first oblique line portion 41c and the end 42c' of the second oblique line portion 42c of the front and back films 10 can be cut cleanly to the end without twisting when opening. It is more preferable that the second distance e is 4 mm or more and 7 mm or less.

[0039] 5, the first weakened line 41 and the second weakened line 42 may include one or more first auxiliary lines 41e and second auxiliary lines 42e. The first auxiliary line 41e does not intersect with the reference line 80, is parallel to the first oblique line portion 41c, and is provided closer to the first edge 71 than the first oblique line portion 41c. The second auxiliary line 42e does not intersect with the reference line 80, is parallel to the second oblique line portion 42c, and is provided closer to the first edge 71 than the first oblique line portion 41c. An intersection x' between an extension of the first auxiliary line 41e and an extension of the second auxiliary line 42e is located on the reference line 80. By providing one or more intersections x' near the first edge 71 side of intersection x of extension lines 41d, 42d, even if intersection x deviates from reference line 80 due to manufacturing variations, the packaging bag 100 can be opened smoothly as long as intersection x' is on reference line 80. In other words, by providing one or more first auxiliary lines 41e and second auxiliary lines 42e, the packaging bag 100 is less susceptible to manufacturing variations and openability is more reliably guaranteed.

[0040] As described above, the packaging bag 100 has good openability because the breaks in the front and back films 10 are prevented from crossing and twisting when the packaging bag 100 is opened, and it also has excellent barrier properties because the occurrence of aluminum cracks is suppressed. EXAMPLES

[0041] As packaging bags according to the examples and comparative examples, packaging bags according to the first embodiment shown in Fig. 1 were manufactured and their openability was evaluated. The manufactured packaging bags had a width of 190 mm in the first direction, and the first and second weakened lines were formed using a carbon dioxide laser with an output of 30 W.

[0042] The manufactured packaging bags were opened by 30 monitors who pulled and tore them open starting from the first notch, and the openability was evaluated. Table 1 shows the first distance d, the second distance e, the presence or absence of the intersection point x on the reference line 80, and the evaluation results (openability, defects / concerns, and overall evaluation) of each of the packaging bags according to Examples 1 to 16 and Comparative Examples 1 to 7.

[0043] For the "ease of opening" category, if 28 or more out of 30 monitors judged the openability to be good, then it was marked with an "◎", if 25 to 27 people judged the openability to be good, then it was marked with an "○", and if 24 or less people judged the openability to be good, then it was marked with an "X".

[0044] The item "Problems and concerns" shows problems and concerns that occurred when the packaging bags of Examples 1-16 and Comparative Examples 1-7 were opened.

[0045] In the "Overall Evaluation" category, if the "Ease of opening" rating was "-" or there were any defects or concerns in the "Defects and concerns" section, the packaging bag was rated as less suitable overall and indicated with a "-"; if the "Ease of opening" rating was "+" and there were no defects or concerns in the "Defects and concerns" section, the packaging bag was rated as suitable and indicated with a "+"; and if the "Ease of opening" rating was "++" and there were no defects or concerns in the "Defects and concerns" section, the packaging bag was rated as more suitable and indicated with a "++".

[0046] [Table 1]

[0047] The packaging bags according to Examples 1 to 16 had a first distance d of 1 mm or more and 8 mm or less, and a second distance of 1 mm or more and 10 mm or less, so the openability was good and no problems or concerns occurred. In particular, the packaging bags according to Examples 3 to 7, 11, and 12 had a first distance d of 2 mm or more and 6 mm or less, and a second distance of 4 mm or more and 7 mm or less, so the openability was evaluated as "++" and was superior to the other Examples.

[0048] In the packaging bag of Comparative Example 1, the first distance d was large at 9 mm, so the breaks in the front and back films were shifted from the intersection point x and crossed, causing a problem of them getting caught on the seal portion of the second edge.

[0049] In the packaging bag of Comparative Example 2, the first distance d was within a suitable range, but the second distance e was small at 0 mm, which raised concerns about the occurrence of aluminum cracks and made the bag difficult to open.

[0050] In the packaging bag according to Comparative Example 3, the first distance d was as small as 0 mm, so that the breaks in the front and back films were twisted due to variations during production, causing snagging and making the bag difficult to open. In addition, the second distance e was also as small as 0 mm, so there was concern about the occurrence of aluminum cracks.

[0051] In the packaging bag according to Comparative Example 4, the first distance d was small at 0 mm, so that the breaks in the front and back films were twisted due to variations during production, causing snagging and making the bag difficult to open.

[0052] In the packaging bag according to Comparative Example 5, the first distance d was −1 mm, so that the breaks in the front and back films were twisted and caught, making it difficult to open.

[0053] The packaging bag according to Comparative Example 6 had a large second distance e of 11 mm, and the tearing of the front and back films was twisted and the bag could not be completely torn, making it difficult to open.

[0054] The packaging bag of Comparative Example 7 had a first distance d and a second distance e of 5 mm, both of which were within the suitable range, but the intersection was not on the reference line, making it difficult to open due to variations during production. [Industrial Applicability]

[0055] The present invention can be suitably used for packaging sheet-like contents such as tapes and patches for transdermal administration of drugs. [Explanation of symbols]

[0056] 100 packaging bags 10 Film 20 Seal part 30 Storage unit 41 First Weakened Line 41a First curved section 41b First straight section 41c First shaded area 41d extension line 42 Second Weakened Line 42a Second curved section 42b Second straight section 42c Second shaded area 42d extension line 51 Notch 71 First Edge 72 Second Edge 73 Third Edge 74 Fourth Edge 80 Reference Line

Claims

1. A rectangular packaging bag in which a storage section is formed by overlapping rectangular films and sealing at least a first edge, a second edge opposite to the first edge, and a third edge adjacent to the first edge and the second edge, A first weakened line on the storage section that linearly weakens one of the overlapped films, and a second weakened line on the storage section that linearly weakens the other of the overlapped films; a notch formed in the first edge; The first weakened line is a first linear portion extending from the notch in parallel to a reference line extending in a direction perpendicular to an extension direction of the first edge; a first curved portion extending from an end portion of the first straight portion on the first edge side toward the first edge side and intersecting the reference line; a first oblique line portion extending from an end of the first straight portion on the second edge side toward the second edge and the reference line, The second weakened line is a second straight portion extending parallel to the reference line; a second curved portion extending from an end of the second straight portion on the first edge side toward the first edge side and intersecting the reference line and the first curved portion; a second oblique line portion extending from an end of the second straight portion on the second edge side toward the second edge and the reference line, the first oblique line portion and the second oblique line portion do not intersect with the reference line, an extension line of the first oblique line portion and an extension line of the second oblique line portion intersect on the reference line; a first distance between an end of the first oblique line portion on the second edge side and an end of the second oblique line portion on the second edge side is 1 mm or more and 8 mm or less; A packaging bag, wherein a second distance between an intersection of an extension of the first oblique line portion and an extension of the second oblique line portion and a seal portion formed on the second edge is 1 mm or more and 10 mm or less.

2. The packaging bag of claim 1 , wherein the first distance is 2 mm or more and 6 mm or less, and the second distance is 4 mm or more and 7 mm or less.

3. the first weakened line includes a first auxiliary line that is parallel to the first oblique line portion and does not intersect with the reference line and extends from the first straight line portion on the first edge side of the first oblique line portion; the second weakened line includes a second auxiliary line extending from the second straight line portion, the second auxiliary line being parallel to the second oblique line portion and not intersecting the reference line, the second auxiliary line being closer to the first edge than the first oblique line portion; The packaging bag according to claim 1 or 2, wherein an extension line of the first auxiliary line and an extension line of the second auxiliary line intersect on the reference line.

Images