Packaging bags

Abstract

To provide a packaging bag capable of suppressing generation of erroneous opening, that can be safely handled, according to the packaging bag provided with an easy-opening part.SOLUTION: There are provided sheet-like first packaging material 10 and second packaging material 20; a seal part 40 where a storage part 5 is formed between the first packaging material 10 and the second packaging material 20, to which the first packaging material 10 and the second packaging material 20 are attached; an easy-opening part 50 becoming a starting point for opening the storage part 5, that is provided to the seal part 40. The easy-opening part 50 comprises a first notch part 60 provided in an area of the seal part 40 according to the first packaging material 10, and formed by cutting from an end edge of the seal part 40 in a storage part 5 direction; and a second notch part 70 provided in an area of the seal part 40 according to the second packaging material 20, and formed by cutting from the end edge of the seal part 40 in the storage part 5 direction. A shape pattern 60A of the first notch part 60 is different from a shape pattern 70A of the second notch part.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, packaging bags have been used to seal and carry liquid, granular, powdery, or solid foods, medicines, and other contents.For example, a packaging bag is known in which the edges of two overlapping resin film packaging materials are sealed to form a bag, and a notch is provided at a predetermined location of the sealed edge as an easy-to-open part that serves as a starting point for opening (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-193002 A Summary of the Invention [Problem to be solved by the invention]

[0004] The notch of the packaging bag disclosed in the above-mentioned Patent Document 1 is a cut made from the edge of the periphery where two packaging materials are stacked and sealed, and penetrates in the front-back direction, i.e., from one packaging material to the other packaging material. As a result, a right-angled corner is formed from the notch to the outer edge of the sealed part, and this corner may roll up and protrude, causing injury to fingers. In addition, if an object hits the corner, a cut may unintentionally form in the sealed part from the notch, leading to erroneous opening.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a packaging bag having an easy-to-open portion that can be handled safely and prevents the occurrence of erroneous opening. [Means for solving the problem]

[0006] (1) A packaging bag of the present invention comprises a first packaging material and a second packaging material in sheet form that are stacked on top of each other, a sealed portion where the first packaging material and the second packaging material are bonded to each other to form a storage portion between the first packaging material and the second packaging material, and an easy-open portion that is provided at a predetermined location of the sealed portion and serves as a starting point for opening the storage portion, wherein the easy-open portion includes: a first cut portion that is provided within the area of ​​the sealed portion in the first packaging material and is formed by cutting from an edge of the sealed portion in the direction of the storage portion, and a second cut portion that is provided within the area of ​​the sealed portion in the second packaging material and is formed by cutting from an edge of the sealed portion in the direction of the storage portion, and the shape pattern of the first cut portion and the shape pattern of the second cut portion are different.

[0007] (2) In (1), the first cut portion includes at least one first cut formed in a line, and the second cut portion includes at least one second cut formed in a line and not overlapping with the first cut.

[0008] (3) In (2), each of the first cut and the second cut is either a notch penetrating the seal portion in the front-to-back direction, or a half cut in which a portion of the surface of the seal portion is removed in the thickness direction.

[0009] (4) In (1), the first cut portion includes at least one first cut formed in a line, the second cut portion includes a band-shaped third cut having a width greater than that of the first cut, and at least one of the first cuts overlaps with the third cut.

[0010] (5) In (4), each of the first cut and the third cut is either a notch penetrating the seal portion in the front-to-back direction, or a half cut in which a portion of the surface of the seal portion is removed in the thickness direction.

[0011] (6) In any one of (1) to (5), at least one of the first packaging material and the second packaging material is provided with an identification display portion that indicates a position of the easy-open portion. Effect of the Invention

[0012] According to the present invention, it is possible to provide a packaging bag having an easy-open portion, which can be handled safely and prevents the occurrence of erroneous opening. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a front view showing a packaging bag according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] 1A and 1B are diagrams showing an easy-open portion of a first embodiment, in which (a) is a front view showing a first cut portion on a first packaging material side, and (b) is a front view showing a second cut portion on a second packaging material side. [Figure 4] FIG. 2 is a front view showing the easy-open portion of the first embodiment. [Diagram 5] FIG. 2 is a perspective view showing an easy-open portion of the first embodiment. [Figure 6] FIG. 2 is a plan view showing an example of a method for producing the packaging bag of the first embodiment. [Figure 7] FIG. 7 is an enlarged view of a portion IIV in FIG. [Figure 8] FIG. 11 is a perspective view showing a modified example of the easy-to-open portion of the first embodiment. [Figure 9] 11A and 11B are diagrams showing an easy-open portion according to a second embodiment of the present invention, in which (a) is a front view showing a first cut portion on the first packaging material side, and (b) is a front view showing a second cut portion on the second packaging material side. [Figure 10] FIG. 11 is a front view showing an easy-open portion of the second embodiment. [Figure 11] FIG. 11 is a perspective view showing an easy-to-open portion of a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0015] (First embodiment) Fig. 1 is a front view of a packaging bag 1 according to a first embodiment. Fig. 2 is a cross-sectional view taken along line II-II of Fig. 1. As shown in Fig. 2, the packaging bag 1 includes a first packaging material 10 on the front side, a second packaging material 20 on the back side that is overlaid and joined to the first packaging material 10, a third packaging material 30 on the bottom side, a sealed portion 40, and an easy-open portion 50. Fig. 1 shows the first packaging material 10 on the front side. Each of the packaging materials 10, 20, 30 is made of a flexible sheet-like resin formed into a predetermined shape.

[0016] As shown in Fig. 2, the packaging bag 1 is a gusset-type bag that can stand on its own by placing a third packaging material 30 underneath. In Fig. 1, the left-right direction of the packaging bag 1 in a self-supporting state is indicated by arrow X, and the up-down direction is indicated by arrow Z. In Fig. 2, the up-down direction of the packaging bag 1 in a self-supporting state is indicated by arrow Z, and the front-rear direction, which is the front-rear direction, is indicated by arrow Y. In the following description, the left-right direction, up-down direction, and front-rear direction (or front-rear direction) are each based on the directions shown in Figs. 1 and 2.

[0017] As shown in FIG. 1, the packaging bag 1 has a substantially rectangular outline when viewed from the front. The outer shape of the packaging bag 1 according to the present invention is not limited to a rectangular shape, and may be, for example, a polygonal shape or a shape whose outer shape includes curves.

[0018] The sealed portion 40 is a portion that constitutes the outer periphery of the packaging bag 1 in which the peripheral portions of the first packaging material 10 and the second packaging material 20 on the front and back are overlapped and bonded to each other. As shown in Figures 1 and 2, the sealed portion 40 includes an upper sealed portion 41, a pair of left and right side sealed portions 42, and a pair of front and rear bottom sealed portions 43.

[0019] The upper seal portion 41 is a portion where an upper peripheral edge portion 11 extending in the left-right direction of the first packaging material 10 and an upper peripheral edge portion 21 extending in the left-right direction of the second packaging material 20 are overlapped and adhered to each other. Each of the pair of left and right side seal portions 42 is a portion where a side peripheral portion 12 extending in the vertical direction of the first packaging material 10 and a side peripheral portion 22 extending in the vertical direction of the second packaging material 20 are overlapped and bonded to each other. Each of the pair of left and right bottom seal portions 43 is a portion where a front bottom peripheral portion 13A extending in the left-right direction of the first packaging material 10 and a front peripheral portion 31A extending in the left-right direction of the third packaging material 30 are overlapped and bonded to each other, and a portion where a rear bottom peripheral portion 13B extending in the left-right direction of the second packaging material 20 and a rear peripheral portion 31B extending in the left-right direction of the third packaging material 30 are overlapped and bonded to each other.

[0020] The top seal portion 41, the side seal portion 42, and the bottom seal portion 43 are formed by a means such as thermal welding (heat sealing) or ultrasonic welding. Inside the first packaging material 10, the second packaging material 20, and the third packaging material 30, a storage portion 5 is formed, which is a space surrounded by the seal portions 41 to 43 and sealed liquid-tight. A predetermined amount of contents is stored and sealed in the storage portion 5. Examples of the contents include liquid, granular, powdery, or solid foods and medicines. The contents are stored in the storage portion 5 from the unsealed upper opening, for example, with the rest of the storage portion sealed except for the top seal portion 41. Thereafter, the open top seal portion 41 is formed and sealed, and the contents are sealed in the packaging bag 1.

[0021] Here, the materials constituting each of the packaging materials 10, 20, and 30 will be described. Each of the packaging materials 10, 20, and 30 is a flexible sheet formed from, for example, a resin such as vinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, or nylon (polyamide), or from aluminum foil. For example, a single-layer structure of a film made of one of the above resins or aluminum foil, or a multi-layer structure in which one or more types of film are bonded together, is used. In the case of a single-layer structure, the thickness is, for example, about 20 to 100 μm, and in the case of a multi-layer structure, the thickness is, for example, about 30 to 200 μm.

[0022] The easy-open portions 50 are disposed at predetermined positions on the upper portions of the left and right side seal portions 42 adjacent to the upper seal portion 41. That is, the packaging bag 1 has a pair of left and right easy-open portions 50. The pair of left and right easy-open portions 50 have the same configuration and are provided symmetrically. The easy-open portions 50 are the starting points for tearing the side seal portions 42 to open the storage portion 5.

[0023] The easy-open portion 50 will be described with reference to Figures 3 to 5. Note that the easy-open portion 50 shown in Figures 3 to 5 shows the easy-open portion 50 on the left side in Figure 1, but the easy-open portion 50 on the right side has the same configuration in a symmetrical manner, so its description will be omitted here.

[0024] The easy-open portion 50 includes a first cut portion 60 provided in the first packaging material 10 shown in FIG. 3(a) and a second cut portion 70 provided in the second packaging material 20 shown in FIG. 3(b). The position of the easy-open portion 50 can be easily confirmed visually by an identification display portion 51 printed on the first packaging material 10. The identification display portion 51 has a home plate-shaped outer shape. The identification display portion 51 is disposed within the area of ​​the side seal portion 42 such that the apex of a triangle forming a part of the outer shape of the identification display portion 51 faces inward in the left-right direction (toward the storage portion 5). The orientation of the apex of the triangle indicates the direction in which the easy-open portion 50 is opened by making a cut in it. The identification display portion 51 indicating the position of the easy-open portion 50 may be provided on the second packaging material 20 or on both packaging materials 10, 20.

[0025] As shown in FIG. 3(a), the first cutout portion 60 on the first packaging material 10 side includes three first notches 61 extending in the left-right direction as the first cutout. The three first notches 61 form a shape pattern 60A of the first cutout portion 60. The three first notches 61 are evenly arranged at equal intervals in the up-down direction within the region of the identification display portion 51, which is within the region of the side seal portion 42. The first notches 61 are linear slits (cutouts) cut from the edge 12a of the side peripheral portion 12 of the first packaging material 10 into the identification display portion 51, and penetrate the side peripheral portion 12 in the front-rear direction and open to the edge 12a. Therefore, a plurality of right-angled corners 12b are formed in the side peripheral portion 12 from the edge 12a to the first notch 61. The number of the first notches 61 is not limited to three, but may be at least one.

[0026] As shown in FIG. 3(b), the second cut portion 70 on the second packaging material 20 side includes two second notches 71 extending in the left-right direction as second cuts. The two second notches 71 form a shape pattern 70A of the second cut portion 70. The two second notches 71 are evenly arranged at equal intervals in the up-down direction within the region of the side seal portion 42. The second notches 71 have the same configuration as the first notches 61, and are linear slits cut from the edge 22a of the side peripheral portion 22 of the second packaging material 20 toward the storage portion 5 side, which is the inside, and penetrate the side peripheral portion 22 in the front-back direction and open to the edge 22a. Therefore, a plurality of right-angled corners 22b are formed in the side peripheral portion 22 from the edge 22a to the second notch 71. The number of second notches 71 is not limited to two, and may be at least one.

[0027] In this embodiment, the first notch 61 and the second notch 71 are both formed to leave a small gap, but they may be simple slits that are extremely small and visually blocked. Each notch 61, 71 is formed by, for example, pushing through each packaging material 10, 20 with a cutter equipped with a blade tip of an appropriate shape. The cuts constituting the first cut portion 60 and the second cut portion 70 are portions that can easily cut a slit in the sealed portion 40 and make it easy to tear each of the packaging materials 10, 20 from the easy-open portion 50 toward the storage portion 5. In addition to notches that penetrate the packaging material from the front to the back, such as the above-mentioned notches 61, 71, such cuts may be half cuts in which a portion of the thickness direction of the packaging materials 10, 20 is removed from the surface by a predetermined depth using means such as ultrasonic waves or a laser.

[0028] 4 and 5 show the easy-open portion 50 in the state of the packaging bag 1 in which the first packaging material 10 and the second packaging material 20 are joined. As shown in Figs. 4 and 5, in the easy-open portion 50, the three first notches 61 and the two second notches 71 are arranged so as not to overlap in the front-back direction, but to be shifted in the up-down direction. In detail, when viewed from the front, one second notch 71 is evenly arranged between a pair of vertically adjacent first notches 61. The edge 12a of the side peripheral portion 12 of the first packaging material 10 and the edge 22a of the side peripheral portion 22 of the second packaging material 20 do not overlap in the left-right direction, but extend in unison in the up-down direction, forming the edge 42a of the side seal portion 42.

[0029] In the easy-open portion 50, the three first notches 61 are closed by the peripheral side edge 22 of the mating second packaging material 20, and the two second notches 71 are closed by the peripheral side edge 12 of the mating first packaging material 10. As a result, the corners 12b on the first packaging material 10 side and the corners 22b on the second packaging material 20 side are integrated into a flat surface and do not protrude. The state in which the first notch 61 and the second notch 71 do not overlap in the front-to-back direction and each corner 12b, 22b does not protrude is due to the fact that the shape pattern 60A of the first cut portion 60 and the shape pattern 70A of the second cut portion 70 formed by each notch 61, 71 are different.

[0030] 3(a) and 3(b), the three first notches 61 and the two second notches 71 are formed in advance in the first packaging material 10 and the second packaging material 20, respectively. Then, when the packaging bag 1 is manufactured, that is, when the side peripheral portions 12, 22 are bonded to each other to form the side seal portion 42, the notches 61, 71 are positioned vertically offset from each other within the area of ​​the identification display portion 51 as described above.

[0031] FIG. 6 shows a schematic diagram of an example of a suitable method for manufacturing the packaging bag 1 of this embodiment having the above-mentioned easy-open portion 50. In FIG.

[0032] 6 shows the state in which the side seal portion 42 and the bottom seal portion 43 are continuously formed while the raw web 100 is transported in the F direction in the production line. For example, the bottom seal portion 43 is formed along the transport direction first, and then the side seal portion 42 perpendicular to the transport direction is formed. The side seal portion 42 and the bottom seal portion 43 are formed, for example, by thermal welding in which the raw web 100 is sandwiched and compressed with a heated pressure member. The raw web 100 with the side seal portion 42 and the bottom seal portion 43 formed is cut at the side seal portion 42, and packaging bags 1 with the top seal portion 41 open are continuously produced.

[0033] Two side seal portions 42 are formed at once across the boundary between two adjacent packaging bags 1 lined up in the conveying direction before cutting. The identification display portion 51 is printed in advance before forming the two side seal portions 42. A cutting line S for cutting the raw roll 100 is set in the two side seal portions 42 at the center in the width direction, which is the boundary between the packaging bags 1 lined up in the conveying direction. After the side seal portions 42 and the bottom seal portion 43 are formed, the cutting line S is cut sequentially by a cutter (not shown) on the downstream side of the production line (right side in FIG. 6), and multiple packaging bags 1 are obtained sequentially.

[0034] 7, the first notch 61 and the second notch 71 are formed in advance by punching on the two original rolls 100 that will become the first packaging material 10 and the second packaging material 20. The two original rolls 100 are cut along the cutting line S to simultaneously form the left easy-open portion 50 and the right easy-open portion 50 shown in FIG.

[0035] The packaging bag 1 of the first embodiment can be opened by using one of the easy-open portions 50. A force is applied to tear the easy-open portion 50 from the edge 42a toward the storage portion 5 so that a cut is made in the easy-open portion 50. Then, the cut is guided to one of the three first notches 61 on the first packaging material 10 side and the two second notches 71 on the second packaging material 20 side, and a cut is made in the side peripheral portion (12 or 22) of the other packaging material that was blocked by the notch (61 or 71), and the easy-open portion 50 is torn along the notch. If the tearing continues, the side seal portion 42 is torn, and the cut reaches the first packaging material 10 and the second packaging material 20 on the front and back sides sandwiching the storage portion 5 therebetween. After this, the first packaging material 10 and the second packaging material 20 are further torn to extend the cut, and the upper part of the packaging bag 1 can be opened.

[0036] The packaging bag 1 according to the first embodiment described above includes a first packaging material 10 and a second packaging material 20 in the form of sheets that are stacked on top of each other, a sealed portion 40 in which the first packaging material 10 and the second packaging material 20 are bonded to each other to form a storage portion 5 between the first packaging material 10 and the second packaging material 20, and an easy-open portion 50 that is provided at a predetermined location of the sealed portion 40 and serves as a starting point for opening the storage portion 5, and includes a first cut portion 60 that is provided within the area of ​​the sealed portion 40 in the first packaging material 10 and is formed by cutting from an edge 42a of the sealed portion 40 in the direction toward the storage portion 5, and a second cut portion 70 that is provided within the area of ​​the sealed portion 40 in the second packaging material 20 and is formed by cutting from the edge 42a of the sealed portion 40 in the direction toward the storage portion 5, and a shape pattern 60A of the first cut portion 60 and a shape pattern 70A of the second cut portion 70 are different.

[0037] Specifically, the first cut portion 60 includes at least one first notch 61 formed by a linear cut, and the second cut portion 70 includes at least one notch 71 formed by a linear cut that does not overlap with the first notch 61.

[0038] If the shape pattern 60A of the first cut portion 60 and the shape pattern 70A of the second cut portion 70 are the same and match, the cuts (corresponding to the first notch 61 and the second notch 71 in this embodiment) penetrate in the front-back direction, and the corners (corresponding to the corners 12b and 22b in this embodiment) formed by the cuts may protrude as in the conventional case. However, since the shape pattern 60A of the first cut portion 60 and the shape pattern 70A of the second cut portion 70 are different as in this embodiment, the corners 12b and 22b do not protrude but are integrated in a flat shape with the side seal portion 42. Therefore, the situation in which the corners 12b and 22b injure the fingers before opening is avoided. In other words, the packaging bag 1 can be handled safely. Furthermore, since objects cannot hit and turn over each corner 12b, 22b, there is no risk of unintentional tears occurring in side seal portion 42 starting from first notch 61 or second notch 71, thereby reducing the occurrence of accidental opening.

[0039] In the packaging bag 1 of the present embodiment, it is preferable that at least one of the first packaging material 10 and the second packaging material 20 is provided with an identification display portion 51 that indicates the position of the easy-open portion 50.

[0040] This allows the position of the easy-to-open portion 50 to be easily confirmed, eliminating the risk of selecting the wrong opening position and enabling the opening operation to be performed quickly.

[0041] FIG. 8 shows a modified example of the first embodiment described above. In this modified example, each of the first packaging material 10 and the second packaging material 20 is a multilayer film having a base layer and a sealant layer. That is, the first packaging material 10 has a base layer 10a on the outer surface side and a sealant layer 10b on the inner surface side, and the second packaging material 20 has a base layer 20a on the outer surface side and a sealant layer 20b on the inner surface side. The base layers 10a and 20a are composed of a film containing at least one biaxially stretched resin film, for example. The sealant layers 10b and 20b are composed of a resin film mainly composed of polyethylene, for example.

[0042] In this modified example, the first cut portion 60 on the first packaging material 10 side constituting the easy-open portion 50 includes three first half cuts 62 as first cuts obtained by removing only the base material layer 10a. The second cut portion 70 on the second packaging material 20 side constituting the easy-open portion 50 includes two second half cuts 72 as second cuts obtained by removing only the base material layer 20a. These half cuts 62, 72 each extend linearly in the left-right direction, and form grooves as weakened line portions on the front and back surfaces of the easy-open portion 50.

[0043] The three first half cuts 62 form a shape pattern 60A of the first cut portion 60, and the two second half cuts 72 form a shape pattern 70A of the second cut portion 70. The first half cuts 62 and the second half cuts 72 are disposed in the same positions as the first notch 61 and the second notch 71 of the first embodiment, respectively. Therefore, the shape pattern 60A of the first cut portion 60 and the shape pattern 70A of the second cut portion 70 formed by the half cuts 62, 72 are different, and the first half cuts 62 and the second half cuts 72 do not overlap in the front-to-back direction.

[0044] According to this modification, when making a cut in the easy-open portion 50, the cut is guided to one of the three first half cuts 62 and the two second half cuts 72, making a cut in the easy-open portion 50, and the side seal portion 42 is torn to open the upper part of the packaging bag 1. In this case, it is preferable to use a resin film that is easy to cut and has good tearability as the sealant layers 10b, 20b, as this makes opening easier.

[0045] Second embodiment Next, a second embodiment of the present invention will be described. In the second embodiment, the second cut portion 70 on the second packaging material 20 side in the easy-open portion 50 of the first embodiment has a different shape, but the other configurations are the same. Therefore, the same reference numerals are used to designate the same components as in the first embodiment, and the description is omitted, and mainly only the differences will be described.

[0046] Fig. 9(a) shows a first cut portion 60 on the first packaging material 10 side constituting the easy-open portion 50 of the second embodiment, and Fig. 9(b) shows a second cut portion 70 on the second packaging material 20 side constituting the easy-open portion 50 of the second embodiment. The first cut portion 60 of the second embodiment shown in Fig. 9(a) has the same configuration as the first cut portion 60 of the first embodiment described above, i.e., includes three first notches 61.

[0047] 9(b), the second cutout portion 70 of the second embodiment includes a single band-shaped third notch 73 as the third cutout, the band-shaped third notch 73 having a width greater than that of the first notch 61. The third notch 73 forms a shape pattern 70B of the second cutout portion 70. The third notch 73 has a home plate shape similar to that of the identification display portion 51, and is disposed within the area of ​​the side seal portion 42 such that the apex of a triangle forming part of the external shape of the third notch 73 faces inward in the left-right direction (toward the storage portion 5).

[0048] The third notch 73 is a strip-shaped cutout extending from the edge 22a of the side peripheral portion 22 of the second packaging material 20 toward the storage portion 5, which is the inside, and penetrates the side peripheral portion 22 in the front-to-back direction and opens to the edge 22a. Therefore, a pair of right-angled corners 22c are formed in the side peripheral portion 22 from the edge 22a to the third notch 73. The shape pattern 70B of the second cut portion 70 formed by the third notch 73 is different from the shape pattern 60A of the first cut portion 60 on the first packaging material 10 side.

[0049] 10 and 11 show the easy-open portion 50 of the second embodiment. In the easy-open portion 50 of the second embodiment, of the three first notches 61 on the first packaging material 10 side, the upper and lower first notches 61 do not overlap with the third notch 73 on the second packaging material 20 side, and only the central first notch 61 overlaps with the third notch 73.

[0050] In the easy-open portion 50 of the second embodiment, of the three first notches 61 on the first packaging material 10 side, the upper and lower two first notches 61 are blocked by the side peripheral portion 22 of the mating second packaging material 20. On the first packaging material 10 side of the easy-open portion 50, two pieces 15 are formed between the first notches 61, and these pieces 15 are partially adhered to the side peripheral portion 22 on the second packaging material 20 side, making them less likely to roll up. As a result, the two corners 12d exposed to the back side by the third notch 73 are less likely to protrude, making it less likely that the corners 12d will injure fingers.

[0051] In addition, most of the area of ​​the third notch 73 on the second packaging material 20 side is blocked by two pieces 15 which are the side peripheral portion 12 of the mating first packaging material 10, and penetrates in the front-to-back direction at the central first notch 61.

[0052] In the second embodiment, when a force is applied to tear the easy-open portion 50 from the edge 42a toward the storage portion 5 so that a cut is made in the easy-open portion 50 when opening, the easy-open portion 50 is guided by one of the three first notches 61 on the first packaging material 10 side and a cut is made in the easy-open portion 50. In the second embodiment, a cut is likely to be made in the central first notch 61 that penetrates from the front to the back. Then, by continuing to apply a tearing force, the first packaging material 10 and the second packaging material 20 on the front and back are torn through the side seal portion 42, and the upper part of the packaging bag 1 can be opened.

[0053] In the packaging bag 1 of the second embodiment, the first cut portion 60 on the first packaging material 10 side includes at least one first notch 61 formed by a linear cut, and the second cut portion 70 on the second packaging material 20 side includes a band-shaped third notch having a width greater than the first notch 61, and at least one first notch 61 overlaps with the third notch 73.

[0054] As a result, the first notch 61 overlapping the third notch 73 makes it easier to tear the easy-to-open portion 50, making it easier to open.

[0055] The present invention is not limited to the above-described embodiments, and various modifications can be made thereto. For example, in the first embodiment, the number and the positions of the first notches 61 and the second notches 71 may be arbitrary as long as the respective shape patterns 60A, 70A are different from each other. In addition, either the first notch 61 or the second notch 71 in the first embodiment may be half-cut. Either the first notch 61 or the third notch 73 in the second embodiment may be half-cut, or both may be half-cut. In addition, the cuts, such as notches and half cuts, that constitute the easy-to-open portion 50 formed in each packaging material 10, 20 are not limited to linear or band-like shapes, and may be of any shape as long as the respective shape patterns 60A, 70A are different from each other. [Explanation of symbols]

[0056] 1 packaging bag 5. Storage section 10 First packaging material 20 Second Packaging Material 40 Seal part 42a Edge of seal 50 Easy opening part 51 Identification display section 60 First cut 60A First cutout shape pattern 61 First notch (first cut) 62 First half cut (first cut) 70 Second cut 70A Second cutout shape pattern 71 Second notch (second cut) 72 Second half cut (second cut) 73 Third notch

Claims

1. a first packaging material and a second packaging material in sheet form that are stacked on top of each other; a seal portion in which the first packaging material and the second packaging material are bonded to each other to form a storage portion between the first packaging material and the second packaging material; An easy-to-open portion is provided at a predetermined location of the seal portion and serves as a starting point for opening the storage portion, The easy-to-open portion is a first cut portion provided within the region of the sealed portion of the first packaging material and cut from an edge of the sealed portion toward the containing portion; a second cut portion provided within the region of the sealed portion of the second packaging material and cut from an edge of the sealed portion toward the containing portion; a shape pattern of the first cut portion and a shape pattern of the second cut portion are different from each other; The first cut portion includes a plurality of first cuts formed linearly, The second cut portion includes at least one second cut formed linearly, The first cut and the second cut extend along a tear-opening direction and are substantially parallel to each other; one end of the first cut is open to an edge of the seal portion and the other end terminates within the area of ​​the seal portion; A packaging bag, wherein one end of the second cut is open to the edge of the sealed portion and the other end terminates within the area of ​​the sealed portion.

2. The packaging bag according to claim 1 , wherein at least one of the second cuts does not overlap with the first cut.

3. 3. The packaging bag according to claim 1, wherein each of the first cut and the second cut is either a notch penetrating the sealed portion in a front-to-back direction or a half cut in which a portion of the surface of the sealed portion is removed in a thickness direction.

4. The packaging bag according to any one of claims 1 to 3, wherein at least one of the first packaging material and the second packaging material is provided with an identification display portion that indicates the position of the easy-open portion.

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