Packaging bag

Abstract

To provide a packaging bag capable of preventing separation caused by fracture during opening.SOLUTION: This packaging bag formed by sealing along at least opposing first and second end edges of laminated film comprises: a notch formed at the first end edge; a scattering stop seal part formed by sealing a region along the second end edge and over an opening scheduled line extending from the notch to a direction orthogonal to the extending direction of the first end edge; and a scattering stop processing part formed to penetrate the scattering stop seal part. The length of the scattering stop processing part in the extending direction of the second end edge is 2-20 mm. The scattering stop processing part is an opening formed by punching at a position away from the outer edge of the scattering stop seal part by 1 mm or more. The opening has a shape in which the intersection point of the opening scheduled line with the opening is passed, and there is no corner closer to the second end edge side than a straight line parallel with the first end edge.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, which are made by combining two rectangular laminated films and sealing the joined edges to form a storage section, and standing pouches, which are made by combining three films to give them the ability to stand on their own.

[0003] Patent Document 1 discloses a packaging bag in which the front and back surfaces are opposed to each other and the top, both side edges, and bottom edge are sealed. The packaging bag can be opened by tearing the film from a notch formed at one edge to the opposite edge.

[0004] In packaging bags such as those described in Patent Document 1, the film is opened by tearing from a notch formed at one end to the opposite end. After opening, the tear strip separates from the packaging bag along the tear line. This creates the problem of the tear strip scattering away from the packaging bag. Furthermore, the need to discard the tear strip in addition to the packaging bag is cumbersome, and the risk of the tear strip being improperly disposed of (such as littering) increases, potentially leading to environmental problems such as a decrease in recycling rates and an exacerbation of the microplastic problem. Furthermore, if the tear strip is small, it cannot be detected during the sorting process during recycling, potentially leading to a decrease in recycling rates.

[0005] In view of the above problems, studies have been conducted on a configuration in which the tear strip does not separate from the package when the packaging bag is opened (Patent Documents 2 and 3). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2020-019563 [Patent Document 2] Japanese Patent Application Publication No. 2018-197112 [Patent Document 3] Special Publication No. 2022-509885 Summary of the Invention [Problem to be solved by the invention]

[0007] However, there is room for further study on the conditions for reliably preventing separation in packaging bags of this configuration.

[0008] The present invention has been made in view of the above-mentioned problems, and has an object to provide a packaging bag that does not break and separate when opened. [Means for solving the problem]

[0009] One aspect of the present invention for solving the above problem is a packaging bag formed by sealing at least along opposing first and second edges of overlapping front and back films, the packaging bag comprising: a notch formed on the first edge that triggers the front and back films to tear when the packaging bag is opened; a shatter-stop seal portion formed by sealing an area of ​​the front and back films along the second edge and straddling a planned opening line that extends from the notch in a direction perpendicular to the extension direction of the first edge; and a shatter-stop processed portion formed to penetrate the shatter-stop seal portion, wherein the length of the shatter-stop processed portion in the extension direction of the second edge is 2 mm or more and 20 mm or less, and the shatter-stop processed portion is a slit formed at a position 1 mm or more away from the outer edge of the shatter-stop seal portion, and all ends of the slit pass through the intersection of the planned opening line and the slit and are located closer to the first edge than a straight line parallel to the first edge.

[0010] Another aspect of the present invention for solving the above-mentioned problem is a packaging bag formed by sealing at least the opposing first and second edges of overlapping front and back films, the packaging bag comprising: a notch formed on the first edge that triggers the front and back films to tear when the packaging bag is opened; a shatter-stop seal formed by sealing an area of ​​the front and back films along the second edge and straddling a planned opening line that extends from the notch in a direction perpendicular to the extension direction of the first edge; and a shatter-stop processed section formed to penetrate the shatter-stop seal section, the length of the shatter-stop processed section in the extension direction of the second edge being 2 mm or more and 20 mm or less, the shatter-stop processed section being an opening formed by punching at a position 1 mm or more away from the outer edge of the shatter-stop seal section, the opening passing through the intersection of the planned opening line and the opening and having no corner on the second edge side of a straight line parallel to the first edge. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a packaging bag that does not break and separate when opened. [Brief explanation of the drawings]

[0012] [Figure 1] 1A and 1B are a plan view and a side view of a packaging bag according to an embodiment of the present invention; [Figure 2] Enlarged view of the packaging bag in Figure 1 [Figure 3] Diagram showing examples of shapes of anti-scattering seal parts [Figure 4] Diagram showing examples of shapes of scattering prevention processed parts [Figure 5] Diagram showing examples of inappropriate shapes of splash-stopping parts [Figure 6] Diagram showing examples of shapes of scattering prevention processed parts [Figure 7] Diagram showing examples of inappropriate shapes of splash-stopping parts [Figure 8] A diagram showing the packaging bag opened DETAILED DESCRIPTION OF THE INVENTION

[0013] A packaging bag according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows a plan view and a side view of a packaging bag according to one embodiment of the present invention, and Fig. 2 is a partially enlarged view of the packaging bag in Fig. 1. The hatched area in Fig. 1 indicates a sealed area, and Figs. 1 and 2 show the state in which the contents are sealed inside.

[0014] The packaging bag 100 is a four-sided sealed packaging bag formed by overlapping two rectangular films 10 (front and back films) and sealing four edges 71-74 over a predetermined width. The four-sided sealed packaging bag can be formed by sealing three edges (three-side sealing) of the two overlapping films 10 to enclose the contents, and then sealing the fourth edge. The packaging bag 100 has a notch 21 formed on edge 71 that triggers the film 10 to break when the storage section 11 is opened, a shatter-stop sealed section 22 formed by sealing a predetermined area on edge 72 opposite edge 71 where the notch 21 is formed, and a shatter-stop processed section 23 formed within the shatter-stop sealed section 22. The packaging bag 100 may also have an opening assist line 40 that linearly weakens the strength of the two overlapping films 10 above the storage section 11 that stores the contents (FIG. 2).

[0015] Hereinafter, the edge where the notch 21 is formed will be referred to as the first edge 71, the edge opposite the first edge 71 as the second edge 72, the edge adjacent to the first edge 71 that is closer to the notch 21 as the third edge 73, and the edge opposite the third edge 73 as the fourth edge 74. For convenience, as shown by the arrows in Figure 1, the direction perpendicular to the extension direction of the first edge 71 and toward the second edge 72 will be defined as the first direction, and the direction perpendicular to the first direction and from the third edge 73 toward the fourth edge 74 will be defined as the second direction.

[0016] (film) Film 10 is a rectangular film material. Two sheets of film 10 are stacked together and their edges are sealed to form packaging bag 100 having storage section 11. The seal widths a and b of the seal portions sealed along first edge 71 and second edge 72 are preferably equal, and can be, for example, between 1 mm and 10 mm, and can be changed depending on the size of the bag and the weight of the contents.

[0017] A multilayer film having two or more layers and including a sealant layer as the innermost layer can be suitably used for film 10 in order to seal edges 71 to 74 by heat sealing or the like. Materials for the layers constituting film 10 include, for example, polyethylene terephthalate (PET), aluminum (AL), cellophane, polyethylene (PE), transparent vapor-deposited PET, low-adsorption sealant (heat-sealable PET (HS-PET), cyclic polyolefin, EVOH sealant, etc.), nylon (NY), paper, etc., and in the case of a multilayer film, these can be used in appropriate combination.

[0018] The layer structure of the film 10, for example, from the outermost layer to the innermost layer when the packaging bag 100 is formed, is PET (12 μm) / AL (7 to 20 μm) / HS-PET (20 to 50 μm), PET (12 μm) / AL (7 to 20 μm) / PE (10 to 30 μm) / PCO (10 to 30 μm), cellophane / AL (7 to 20 μm) / HS-PET (20 to 50 μm), cellophane / AL (7 to 20 μm) / PE (10 to 30 μm) / COP (10 to 30 μm), PET (12 μm) / AL (7 to 20 μm) / PE (20 to 50 μm). m), 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), and environmentally friendly layer configurations include PP (10-30 μm) / barrier PP (10-30 μm) / PE (10-40 μm), PP (10-30 μm) / barrier PP (10-30 μm) / PP (10-40 μm), PE (10-30 μm) / barrier PE (10-30 μm) / PE (10-40 μm), and paper (50-150 g / m 2) / barrier vapor deposition film (10 to 30 μm) / PE (10 to 40 μm), etc. can be used. In the above example, the opening assisting line 40 can be formed on the outermost layer.

[0019] (notch) The notch 21 is a cutout formed in the first edge 71 of the packaging bag 100. When a user of the packaging bag 100 opens the packaging bag 100, the notch 21 can be used as a trigger to start tearing the film 10. The notch 21 may be formed as a triangular cutout as shown in FIG. 1, but may also be a cutout of another shape such as a pentagon as long as it serves as a trigger to tear the film 10, or may also be a linear cutout.

[0020] (Spatter prevention seal) The shatter-resistant seal portion 22 is formed by sealing a predetermined area of ​​the two overlapping films 10. The sealed area of ​​the shatter-resistant seal portion 22 can be an area that straddles the intended opening line 30 extending from the notch 21. Furthermore, a shatter-resistant processed portion 23 that penetrates the shatter-resistant seal portion 22 is formed within the shatter-resistant seal portion 22, and any tearing of the film 10 triggered by the notch 21 is stopped when it reaches the shatter-resistant seal portion 22 and the shatter-resistant processed portion 23. This prevents the tear strip from separating.

[0021] The shape of the shatterproof seal portion 22 is not particularly limited, but may be, for example, a square as shown in FIG. 1 or a circle or triangle as shown in FIG. 3. The shatterproof seal portion 22 may be formed overlapping the seal along the second edge 72 or may be formed separately. When the shatterproof seal portion 22 is formed overlapping the seal along the second edge 72, the width c of the shatterproof seal portion 22 in the first direction is at least equal to the seal width b of the second edge 72, preferably 5 mm to 20 mm. If the width c exceeds 20 mm, the shatterproof seal portion 22 protrudes significantly inward (toward the container 11) from the seal formed along the second edge 72, making it difficult to seal the contents and reducing the weight of the contents. Furthermore, the length e of the shatterproof seal portion 22 in the second direction is at least 2 mm greater than the length d of the shatterproof seal portion 23 in the second direction. The shatterproof seal portion 22 may be formed so as to overlap the third edge 73, or may be formed so as to be spaced apart from the third edge 73 as shown in FIG.

[0022] (Scatter stop processing section) The shatterproof seal 23 is formed at the center of the shatterproof seal 22 so as to penetrate the seal 22. The shatterproof seal 23 is formed at a position 1 mm or more away from the outer edge of the shatterproof seal 22 and may be a notch as shown in FIG. 1 or an opening formed by punching. When the shatterproof seal 23 is formed by punching, film fragments are generated as waste. Therefore, the shatterproof seal 23 is preferably a notch. Furthermore, the length d of the shatterproof seal 23 in the second direction is preferably 2 mm or more and 20 mm or less. If it is less than 2 mm, the shatterproof seal 22 is too small and difficult to form. If it exceeds 20 mm, the shatterproof seal 22 becomes larger due to the shatterproof seal 23, making it difficult to seal the contents. Furthermore, the length d of the shatterproof seal 23 in the second direction is more preferably 5 mm or more and 10 mm or less. This makes it easier to form the shatterproof seal 23 at the desired position during the production process and prevents a tear initiated by the notch 21 from moving away from the shatterproof seal 23. Furthermore, depending on the layer configuration of the packaging body, stretching the film 10 can easily cause a tear in each of the two overlapping films 10 to move away from each other in the second direction (hereinafter referred to as "separation"). If the length d of the shatterproof seal 23 in the second direction is less than 5 mm, the tear may move away from the shatterproof seal 22 or completely overlap the shatterproof seal 23, impairing its tearing function. Even if the tear moves away from the shatterproof seal 22, the force applied in the first direction to cause the tear is displaced away from the first direction, preventing the tear from reaching the second edge 72, which may prevent the packaging bag 100 from separating. However, the opening of packaging bag 100 formed by the separation crosses the front and back of film 10, making it difficult to remove the contents and making opening less comfortable. On the other hand, if length d exceeds 10 mm, the content volume will be reduced.

[0023] When the shatterproof section 23 is formed by a slit, all ends of the slit must pass through the intersection of the intended opening line 30 and the slit and be positioned closer to the first edge 71 than a straight line parallel to the first edge 71. A shape of the shatterproof section 23 that satisfies this condition can be, for example, an arc shape convex toward the second edge 72, as shown in FIGS. 1 and 4(a). Alternatively, it can be configured as a curved shape that opens toward the first edge 71, as shown in FIGS. 4(b) and 4(c). If the shape of the slits that make up the shatterproof section 23 satisfies the above condition, when the break reaches the shatterproof section 23, the force in the first direction used for the break is dispersed by the shatterproof section 23, reducing the force in the first direction. Therefore, the shatterproof section 23 stops the break and prevents the packaging bag 100 from separating. An example of a shatterproof section 23 that does not satisfy this condition is shown in FIG. 5. In the example of FIG. 5, when the fracture reaches the scattering prevention processed portion 23, force is concentrated on the end portion of the notch on the side of the second edge 72, and the fracture may progress in the direction of the arrow in the figure.

[0024] When the shatterproof section 23 is formed by punching, the punched section (opening) should be formed so that it passes through the intersection of the intended opening line 30 and the opening and has a shape that does not have a corner on the second edge 72 side of a straight line parallel to the first edge 71. A shape of the shatterproof section 23 that satisfies this condition can be, for example, a circle as shown in FIG. 6. When the punched shape satisfies the above condition, when the break reaches the shatterproof section 23, the force in the first direction used for the break is dispersed by the shatterproof section 23, reducing the force in the first direction. This stops the break and prevents the packaging bag 100 from separating. An example of a shatterproof section 23 that does not satisfy this condition is shown in FIG. 7. In the example of FIG. 7, when the break reaches the shatterproof section 23, force is concentrated at the corner of the shatterproof section 23 on the second edge 72 side, and the break may progress from the corner on the second edge 72 side in the direction of the arrow in the figure.

[0025] (Opening aid line) The opening assisting line 40 is a weakened line formed by linearly weakening the strength of the film 10 in a first direction from the notch 21, and is obtained, for example, by forming discontinuous linear cuts (half cuts) in the film 10. The opening assisting line 40 is formed in an area that does not overlap with the sealed portion along the edges 71 to 74 or the shatter-stop processed portion 23 in a planar view. By providing the opening assisting line 40, the tear triggered by the notch 21 can proceed along the opening assisting line 40 and more reliably reach the shatter-stop sealed portion 22. The opening assisting line 40 is formed on each of the two overlapping films 10, and overlaps each other in a planar view, for example, as shown in FIG. 1. The opening assisting line 40 coincides with the intended opening line 30.

[0026] To facilitate tearing, when the film 10 is a laminated film, the cut that forms the opening assisting line 40 is preferably provided in a stretched base material layer that does not have cutting properties, excluding a barrier layer such as an aluminum layer. The opening assisting line 40 can be formed by a known method, such as using a blade such as a Thomson blade or a razor blade, or a carbon dioxide laser. Note that the opening assisting line 40 may be provided in multiple lines instead of one as shown in FIG. 1, or may be omitted.

[0027] (How to open) A method for opening the packaging bag 100 will now be described. Figure 8 is a diagram showing the state of the packaging bag after it has been opened. The hatched areas in Figure 8 indicate the sealed areas.

[0028] By applying force to the notch 21, the packaging bag 100 can cause a tear to occur at the first edge 71, triggered by the notch 21. By applying a force to the packaging bag 100 that tears the film 10 along a first direction, the tear progresses from the first edge 71 in the first direction. The tear then progresses a predetermined distance from the first edge 71 and reaches the opening assisting line 40. By continuing to apply force to the packaging bag 100, the tear progresses further along the opening assisting line 40 and reaches the end of the shatter-stop seal portion 22 on the first edge 71 side. As a result, an opening surrounded by the broken surface of the film 10 is formed in the packaging bag 100, as shown in FIG. 8 .

[0029] By continuing to apply force to the packaging bag 100 from this state, the tear progresses within the shatter-stop seal portion 22 and reaches the shatter-stop seal portion 23. When the tear reaches the shatter-stop seal portion 23, the force in the first direction used for the tear is dispersed by the shatter-stop seal portion 23, reducing the force in the first direction. This makes it difficult for the tear to progress beyond the shatter-stop seal portion 23 toward the second edge 72, and the tear can be stopped by the shatter-stop seal portion 23. Because the packaging bag 100 is connected between the shatter-stop seal portion 23 and the second edge 72, the tear strip does not separate from the packaging bag 100 after opening and does not scatter. Furthermore, there is no need to separately discard the tear strip in addition to the packaging bag 100, which prevents the tear strip from being improperly disposed of. Furthermore, because small separated tear strips are not produced, detection errors during the sorting process during recycling are prevented, suppressing a decrease in the recycling rate.

[0030] As described above, the packaging bag 100 according to the present embodiment includes a notch 21 formed in the first edge 71, a shatter-stop seal 22 formed in a region of one of the two films 10 that protrudes inward from the second edge 72 and straddles the intended opening line 30 that extends from the notch 21 in a direction perpendicular to the extension direction of the first edge 71, and a shatter-stop processed portion 23 formed at a position 1 mm or more away from the outer edge of the shatter-stop seal 22 so as to penetrate the shatter-stop seal 22. When the shatter-stop processed portion 23 is formed by a slit, all ends of the slit pass through the intersection of the intended opening line 30 and the slit and are located closer to the first edge 71 than a straight line parallel to the first edge 71. This prevents the tear that starts from the first edge 71 side triggered by the notch 21 from progressing beyond the shatterproof portion 23 toward the second edge 72 side, thereby preventing the tear strip from separating from the packaging bag 100 after opening. In addition, the length d of the shatterproof portion 23 in the second direction is 2 mm or more and 20 mm or less. This makes it easier to form the shatterproof portion 23 and to seal the contents.

[0031] Similarly, when the anti-scattering processed portion 23 is formed by punching, if the punched portion (opening) passes through the intersection of the intended opening line 30 and the opening and has a shape that does not have a corner on the second edge side 72 rather than a straight line parallel to the first edge 71, it is possible to prevent the opening piece from separating from the packaging bag 100 after opening.

[0032] Although the present embodiment has been described with respect to a rectangular packaging bag sealed on all four sides, it may also be a three-sided sealed packaging bag formed by folding a single sheet, sealing two opposing edges (corresponding to edges 71 and 72) to enclose the contents, and then sealing the third edge (corresponding to edge 73 or edge 74). It may also be a self-standing pouch or the like that further includes a bottom film on the fourth edge 74 side between the two films 10. The bottom film forms the bottom of the packaging bag by being sealed to the two films 10 along the fourth edge 74. [Example]

[0033] (Examples 1 to 16) A packaging bag was produced by sealing the four sides and forming a notch, a shatterproof seal, and a shatterproof processed portion. The lengths of the packaging bag in the first and second directions were 80 mm and 100 mm, respectively, and the seal widths a and b of the seals formed along the first edge 71 and the second edge 72 were 5 mm. The shatterproof seal was rectangular, and the shatterproof processed portion was formed as a convex arc-shaped cut on the second edge side shown in Figure 1 (Figure 4(a)). The layer structure of the packaging bag, the width c and length e of the shatterproof seal, and the length d of the shatterproof processed portion were as shown in Table 1. Configuration 1 and Configuration 2 in the layer structure of the packaging bag are as follows: Configuration 1: PET12μm / PE15μm / AL9μm / PE20μm Configuration 2: PET 12 μm / ONY 15 μm / AL 7 μm / PP 60 μm Configuration 1 is a configuration in which a bitter separation is unlikely to occur, while configuration 2 is a configuration in which a bitter separation is likely to occur.

[0034] Examples 17 to 22 A packaging bag was produced in the same manner as in Example 1, except that the scattering prevention processed portion was formed by punching out a circle as shown in FIG.

[0035] (Comparative Examples 1 and 3) A packaging bag was produced in the same manner as in Example 1, except that the shatterproof seal portion and the shatterproof processed portion were not formed.

[0036] (Comparative Examples 2 and 4) A packaging bag was produced in the same manner as in Example 1, except that no anti-scattering processed portion was formed and the seal width c and length e of the anti-scattering seal portion were set as shown in Table 2.

[0037] (Comparative Examples 5 to 10) A packaging bag was produced in the same manner as in Example 1, except that the anti-scattering processed portion was formed by a linear cut extending in the second direction shown in Figure 5(a), and the width c and length e of the anti-scattering sealed portion and the length d of the anti-scattering processed portion were set as shown in Table 2.

[0038] (Comparative Examples 11 to 18) A packaging bag was produced in the same manner as in Example 1, except that the anti-scattering processed portion was formed as a convex arc-shaped notch on the first edge side shown in Figure 5(b), and the width c and length e of the anti-scattering seal portion and the length d of the anti-scattering processed portion were as shown in Table 2.

[0039] Ten packaging bags each according to Examples 1 to 22 and Comparative Examples 1 to 18 were prepared and each was opened from the notch. The number of packaging bags that separated and whether or not separation occurred were confirmed, and evaluation was carried out according to the following criteria. ◎: No separation or separation occurred in any of the packaging bags ○: No separation occurred in all packaging bags, but separation occurred in some packaging bags △: When separation occurs in some packaging bags ×: Separation occurred in all packaging bags, or in all packaging bags where separation did not occur, the reason for separation was a bitter separation.

[0040] Tables 1 and 2 summarize the seal widths a and b of the seal portion formed along the first edge 71 and the second edge 72, the width c and length e of the shatter-stop seal portion, the length d of the shatter-stop processed portion, the shape of the shatter-stop processed portion, the number of packaging bags that did not separate out of 10 packaging bags, the number of packaging bags that did not separate and that became separated, and the evaluation results.

[0041] [Table 1]

[0042] [Table 2]

[0043] The packaging bags according to Examples 1 to 8 and 17 to 19 did not experience separation because they had Configuration 1, which makes separation less likely to occur. In addition, the scattering prevention processed portion was formed by a cut as shown in Fig. 4(a) or a circular punch as shown in Fig. 6, so separation of the packaging bag did not occur.

[0044] The packaging bags according to Examples 9 to 16 and 20 to 22 were prone to separation due to the configuration 2 that caused separation. In addition, because the scattering prevention processed portion was formed by the notch shown in Fig. 4(a) or the circular punching shown in Fig. 6, separation did not occur in any of the packaging bags.

[0045] Comparative Examples 1 and 2 did not experience separation due to the use of Configuration 1, which is less likely to cause separation. Furthermore, because no scattering stopper was formed, separation occurred in all packaging bags. Furthermore, Comparative Examples 3 and 4 did not have a scattering stopper, so some packaging bags separated. Furthermore, because Configuration 2, which is more likely to cause separation, did cause separation in packaging bags where separation did not occur.

[0046] In Comparative Examples 5 to 7 and 11 to 14, separation did not occur because they had Configuration 1, which is less likely to cause separation. However, because the shapes of the anti-scattering processed parts were as shown in Figures 5(a) and (b), separation occurred in all of the packaging bags.

[0047] In Comparative Examples 8 to 10 and Comparative Examples 15 to 18, separation occurred because the configuration 2 was prone to separation, and further, because the shape of the anti-scattering processed portion was as shown in Figures 5(a) and (b), separation occurred in all packaging bags. [Industrial Applicability]

[0048] The present invention can be suitably used for a packaging bag 100 formed by overlapping two sheets of film 10 and sealing the edges. [Explanation of symbols]

[0049] 10: Film 11: Storage section 21: Notch 22: Anti-scattering seal 23: Splash stop processing section 30: Opening line 40: Opening aid line 71: First edge 72: Second edge 73: Third edge 74: Fourth edge 100: Packaging bag a: Seal width b: Seal width c: Width of the scattering prevention seal d: Length of the anti-scattering seal

Claims

1. A packaging bag formed by sealing at least a first edge and a second edge of overlapping front and back films, the first edge and the second edge being opposite to each other, a notch formed on the first edge, which triggers the front film and the back film to break when the packaging bag is opened; a shatterproof seal portion formed by sealing an area of ​​the front film and the back film along the second edge and across an intended opening line extending from the notch in a direction perpendicular to the extension direction of the first edge; a scattering prevention processed portion formed to penetrate the scattering prevention seal portion, The length of the scattering stopper processed portion in the extension direction of the second edge is 2 mm or more and 20 mm or less, The scattering prevention processed portion is a notch formed at a position spaced 1 mm or more from the outer edge of the scattering prevention seal portion, A packaging bag in which all ends of the slit pass through the intersection of the intended opening line and the slit and are located closer to the first edge than a straight line parallel to the first edge.

2. A packaging bag formed by sealing at least a first edge and a second edge of overlapping front and back films, the first edge and the second edge being opposite to each other, a notch formed on the first edge, which triggers the front film and the back film to break when the packaging bag is opened; a shatterproof seal portion formed by sealing an area of ​​the front film and the back film along the second edge and across an intended opening line extending from the notch in a direction perpendicular to the extension direction of the first edge; a scattering prevention processed portion formed to penetrate the scattering prevention seal portion, The length of the scattering stopper processed portion in the extension direction of the second edge is 2 mm or more and 20 mm or less, The scattering prevention processed portion is an opening formed by punching at a position spaced 1 mm or more from the outer edge of the scattering prevention seal portion, The opening of the packaging bag passes through the intersection of the intended opening line and the opening, and has a shape that does not have a corner on the second edge side of a straight line parallel to the first edge.

3. The packaging bag according to claim 1 or 2, wherein the shatterproof seal portion protrudes inward from the seal along the second edge.

4. The packaging bag according to claim 1 , wherein the cut is an arc-shaped cutout that is convex toward the second edge.

5. The packaging bag according to claim 2 , wherein the opening is circular.

6. The packaging bag according to claim 1 or 2, further comprising an opening assist line formed by weakening the film on the intended opening line.

7. A packaging bag according to claim 1 or 2, in which contents are stored in a storage section formed between the front film, the back film, and the bottom film, and the front film, the back film, and the bottom film are sealed along a third edge adjacent to the first edge and the second edge, and a fourth edge opposite the third edge, to give the bag self-supporting properties.

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