Packaging bags

Abstract

To provide a packaging bag with excellent openability.SOLUTION: A packaging bag is provided. The packaging bag includes a cylindrical body formed by forming a vertical seal part on a film, an upper horizontal seal part, a lower horizontal seal part, and an opening seal part. The upper horizontal seal part is provided so as to close the upper side of the cylindrical body. The lower horizontal seal part is provided so as to close the lower side of the cylindrical body. The opening seal part is provided so as to extend from one side edge of the packaging bag. The vertical seal part is provided in a palm-joint part in which the inner surfaces of both side edges of the film are overlapped with each other. The palm-joint part is tilted toward the one side edge. A first easy-opening part is provided in the opening seal part. A second easy-opening part is provided in the palm-joint part. When the packaging bag is viewed in a plan view, the opening seal part is continuous with the vertical seal part or continuous with the protrusion seal part protruding from the vertical seal part toward the side edge of the palm-joint part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] The packaging bag of Patent Document 1 is provided with easy-opening means in the joint-seamed seal portion and cutting means in the main body of the packaging bag, thereby making it easy to open the packaging bag. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-237454 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, the cutting means for the main body of the packaging bag and the easy-to-open means for the hem-and-seal portion are separated, so the direction of the tearing initiated by the cutting means may deviate from the direction in which the easy-to-open means is located. In such cases, the hem-and-seal portion cannot be cut properly, which can make it difficult to open the packaging bag.

[0005] The present invention has been made in view of the above circumstances, and aims to provide a packaging bag that is easy to open. [Means for solving the problem]

[0006] According to the present invention, there is provided a packaging bag comprising a cylindrical body formed by forming a vertical seal portion in a film, an upper horizontal seal portion, a lower horizontal seal portion, and a tear-open seal portion, wherein the upper horizontal seal portion is arranged to close the upper side of the cylindrical body, the lower horizontal seal portion is arranged to close the lower side of the cylindrical body, the tear-open seal portion is arranged to extend from one side edge of the packaging bag, the vertical seal portion is arranged at a seam portion where the inner surfaces of both side edge portions of the film are overlapped, the seam portion is folded down toward the one side edge, the tear-open seal portion is provided with a first easy-open portion, and the seam portion is provided with a second easy-open portion, and when the packaging bag is viewed in a plane, the tear-open seal portion is continuous with the vertical seal portion or continuous with a protruding seal portion that protrudes from the vertical seal portion toward the side edge of the seam portion.

[0007] In the packaging bag of the present invention, when the packaging bag is viewed in a plane, the opening seal portion is continuous with the vertical seal portion or the protruding seal portion, thereby preventing the direction of tearing initiated at the first easy-to-open portion from deviating from the direction in which the second easy-to-open portion is located, making it easy to tear at the first and second easy-to-open portions continuously, improving openability.

[0008] Various embodiments of the present invention will be described below as examples, and the embodiments shown below can be combined with each other. Preferably, in the packaging bag described above, the first and second easy-open portions are provided so as to be continuous when the packaging bag is seen in a plan view. Preferably, in the packaging bag described above, the first and second easy-open portions are each formed by perforations. Preferably, in the packaging bag described above, the vertical seal portion is provided at a position away from the side edge of the seam portion, the seam portion is provided with a protruding seal portion that protrudes from the vertical seal portion toward the side edge of the seam portion, and at least a portion of the second easy-open portion is provided in the protruding seal portion. Preferably, in the packaging bag described above, the value of [left-right length of the second easy-open portion / left-right length of the folding portion] is 0.5 or more. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a plan view of the packaging bag 1 when no contents are contained. [Figure 2] 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG. [Figure 3] 2B is a cross-sectional view corresponding to FIG. 2A, showing a modified example of the packaging bag 1. FIG. [Figure 4] FIG. 1 is a configuration diagram of a bag making and filling machine 100. [Figure 5] 1 is an enlarged view of the vicinity of a horizontal sealing machine 116 of a bag making and filling machine 100, showing a state in which a horizontal seal portion 11 and an opening seal portion 6 are formed by the horizontal sealing machine 116. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes embodiments of the present invention. The various features shown in the following embodiments can be combined with each other. Furthermore, each feature can be an invention independently.

[0011] 1. Packaging bag 1 As shown in Figures 1 and 2, a packaging bag 1 according to one embodiment of the present invention comprises a cylindrical body 3 formed by forming a vertical seal 7 on a film 2, an upper horizontal seal 4, a lower horizontal seal 5, and a tear seal 6. The various seals can be formed by heat-sealing opposing inner surfaces of the film 2. The packaging bag 1 is usually filled with contents, but for convenience, Figure 1 shows the packaging bag 1 in an empty state. Examples of contents include food products such as flour paste, jam, and bean paste.

[0012] 1 will be referred to as the top, bottom, left, and right of the packaging bag 1. Specifically, the axial direction of the cylindrical body 3 is the top and bottom direction, and the left and right when the vertical seal portion 7 is positioned on the front side are the left and right of the packaging bag 1. The surface on the vertical seal portion 7 side is referred to as the front surface, and the opposite surface is referred to as the back surface.

[0013] The length of the packaging bag 1 in the left-right direction is, for example, 140 to 400 mm, preferably 160 to 300 mm. Specifically, this length may be, for example, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, or 400 mm, and may be within a range between any two of the values ​​exemplified here. If this value is too small, the contents may adhere to the inner surface of the packaging bag 1 during bag formation and filling, making filling difficult. This problem is more pronounced when the contents are highly viscous. The value of [vertical length of packaging bag 1 / left-right length of packaging bag 1] is, for example, 1.1 to 5, preferably 2 to 4. Specific examples of this value are 1.1, 1.2, 1.3, 1.4, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, and 5, and may be within a range between any two of the numerical values ​​exemplified here.

[0014] The upper horizontal seal portion 4 and the lower horizontal seal portion 5 are provided to close the upper and lower sides, respectively, of the cylindrical body 3. The horizontal seal portions 4, 5 are preferably formed along the upper and lower ends, respectively, of the cylindrical body 3. The horizontal seal portions 4, 5 are preferably formed so as to intersect the vertical seal portion 7 at right angles.

[0015] The unsealing seal part 6 is provided so as to extend from one side edge 1a of the packaging bag 1. As shown in FIG. 2, the longitudinal seal part 7 is provided at the clasp part 8 where the film 2 is curved into a tubular shape and the inner surfaces of both side edges 2a and 2b of the film 2 are overlapped with each other. The clasp part 8 is tilted toward the one side edge 1a. As shown in FIG. 2A, it is preferable that the side edge 6a on the clasp part 8 side of the unsealing seal part 6 coincides with the side edge 8a of the clasp part 8 in a plan view, or as shown in FIG. 3, the unsealing seal part 6 overlaps the clasp part 8 in a plan view. The plan view means, as shown in FIG. 1, flattening the packaging bag 1 in a state where no content is contained in the packaging bag 1 and viewing it from a direction perpendicular to the main surface 1b of the packaging bag 1 in that state.

[0016] In other words, when the length in the left - right direction of the clasp part 8 in the state where the clasp part 8 is tilted is L1, the width in the left - right direction of the unsealing seal part 6 is L2, and the length in the left - right direction from the base of the clasp part 8 to the one side edge 1a is L3, it is preferable that L3 = L1+L2 as shown in FIG. 2A or L3 < L1+L2 as shown in FIG. 3. In FIGS. 2 to 3, for the sake of illustration, the state where the clasp part 8 is slightly lifted from the cylindrical body 3 is shown, and various lengths such as L1 are shown in this figure. However, the various lengths mean the lengths in a state where the packaging bag 1 is flattened in a state where no content is contained in the packaging bag 1 and the clasp part 8 is brought into close contact with the cylindrical body 3 as much as possible. The unsealing seal part 6 may be separated from the transverse seal parts 4 and 5 as shown in FIG. 1, or may be integrated with either of the transverse seal parts 4 and 5.

[0017] When the length in the left - right direction of the packaging bag 1 is L, it is preferable that L3 / L is 0.5 to 0.1. In this case, there is an advantage that it is easy to reduce the length L1 in the left - right direction of the clasp part 8. Specifically, L3 / L is, for example, 0.1, 0.2, 0.3, 0.4, 0.45, 0.5, and it may also be within the range between any two of the numerical values exemplified here.

[0018] The tear seal portion 6 is provided with a first easy-open portion 6b. The first easy-open portion 6b is composed of an easy-open portion. The easy-open portion is a portion that has been processed to make it easier to open the packaging bag 1. The easy-open portion is, for example, a portion where the film 2 has already been cut (e.g., a cut or notch), or a portion where the film 2 has been processed to make it easier to cut (e.g., a half cut or perforation). If the easy-open portion is the former, there is a risk that the film 2 may be accidentally torn at the easy-open portion, so it is preferable that the easy-open portion is the latter, and since perforations can be easily formed, it is even more preferable that the easy-open portion is a perforation.

[0019] The joint portion 8 is provided with a second easy-open portion 8b. The second easy-open portion 8b is composed of an easy-open portion. The easy-open portion has been described above. If the length of the easy-open portion 8b in the left-right direction is L4, L4 / L1 is preferably 0.2 or more, and more preferably 0.5 or more. If this value is too small, it may be difficult to tear the joint portion 8. L4 / L1 is, for example, 0.2 to 0.9, and specifically, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9, and may be within a range between any two of the numerical values ​​exemplified here.

[0020] The easy-open portions 6b, 8b are preferably provided so as to be continuous when the packaging bag 1 is viewed in a plan view. "Continuously" means that the easy-open portion 6b contacts the easy-open portion 8b in a plan view. Examples of the manner in which the easy-open portion 6b contacts the easy-open portion 8b in a plan view include a manner in which the end point 6c of the easy-open portion 6b and the end point 8c of the easy-open portion 8b contact in a plan view, as shown in FIGS. 1 and 2A, and a manner in which the easy-open portion 6b and the easy-open portion 8b partially overlap, as shown in FIG. 3. The easy-open portions 6b, 8b are preferably parallel, but may be non-parallel. Furthermore, the easy-open portions 6b, 8b are preferably aligned in a straight line, but may be slightly misaligned. Even if they are slightly misaligned, the packaging bag 1 can be distorted during opening to adjust the vertical positions of the easy-open portions 6b, 8b so that they are aligned in a straight line. The vertical displacement of the easy-open portions 6b and 8b is preferably 15 mm or less, more preferably 10 mm or less, and even more preferably 5 mm or less.

[0021] Incidentally, the vertical seal 7 may be provided over the entire seam 8, but as the area of ​​the vertical seal 7 increases, there is a problem in that the time required for heat sealing to form the vertical seal 7 increases. For this reason, the vertical seal 7 is preferably provided over only a portion of the seam 8. If the length of the strip-shaped vertical seal 7 in the left-right direction is L5, then L5 / L1 is preferably 0.9 or less, for example, 0.1 to 0.9, and specifically, for example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9, and may be within a range between any two of the values ​​exemplified here.

[0022] If the vertical seal portion 7 does not reach the side edge 8a of the seam portion 8, at least a portion of the easy-open portion 8b will not be sealed, and the both side edge portions 2a, 2b of the film 2 will be separated from each other, resulting in poor handleability. Therefore, it is preferable to provide a protruding seal portion 9 that protrudes from the vertical seal portion 7 toward the side edge 8a of the seam portion 8, and to provide at least a portion of the easy-open portion 8b in the protruding seal portion 9. This results in the both side edge portions 2a, 2b being welded at the end point 8c of the easy-open portion 8b, improving handleability. The protruding seal portion 9 is preferably provided so as to extend perpendicularly from the vertical seal portion 7, but it may also be provided so as to extend non-perpendicularly.

[0023] When the packaging bag 1 is viewed in a plan view, it is preferable that the tear seal portion 6 is continuous with the protruding seal portion 9. Examples of the configuration in which the tear seal portion 6 is continuous with the protruding seal portion 9 include a configuration in which the side edge 6a of the tear seal portion 6 overlaps the side edge 9a of the protruding seal portion 9 when the packaging bag 1 is viewed in a plan view, as shown in Figures 1 and 2A, and a configuration in which the tear seal portion 6 and the protruding seal portion 9 overlap, as shown in Figure 3. Note that if the vertical seal portion 7 reaches the side edge 8a of the seam portion 8, examples of the configuration in which the side edge 6a of the tear seal portion 6 overlaps the side edge of the vertical seal portion 7 when the packaging bag 1 is viewed in a plan view include a configuration in which the side edge 6a of the tear seal portion 6 overlaps the side edge of the vertical seal portion 7, and a configuration in which the tear seal portion 6 overlaps the vertical seal portion 7. In such cases, the tear direction at the easy-open portion 6b is less likely to deviate from the direction in which the easy-open portion 8b is located, making it easier to tear continuously at the easy-open portions 6b, 8b.

[0024] If the vertical length of the protruding seal portion 9 is L6, then L6 / L5 is, for example, 0.2 to 3, and preferably 0.5 to 2. Specific examples of this value are 0.2, 0.5, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5, and 3.0, and may be within a range between any two of the numerical values ​​exemplified here.

[0025] If the length of the opening seal portion 6 in the vertical direction is L7, then L7 / L6 is, for example, 0.2 to 3, and preferably 0.5 to 2. Specific examples of this value are 0.2, 0.5, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5, and 3.0, and may be within a range between any two of the numerical values ​​exemplified here.

[0026] The film 2 is preferably a laminated film having a base layer and a sealant layer, and more preferably has an adhesive layer between the base layer and the sealant layer.

[0027] The base material layer is disposed so as to be exposed on the outer surface of the packaging bag 1, and the sealant layer is disposed so as to be exposed on the inner surface of the packaging bag 1. The sealant layers are heat-sealed together to form a sealed portion.

[0028] The base layer is made of a material having excellent strength and high impact resistance, such as polyamide, polyolefin, polyethylene, etc. The adhesive layer is a layer for adhering the base layer and the sealant layer so that they are laminated together, and such an adhesive layer is made of, for example, polyethylene, etc.

[0029] The polyamide of the base layer preferably contains an aromatic polyamide, because in this case the base layer has linear cut properties in the MD direction and excellent barrier properties. There are no particular restrictions on the aromatic polyamide, but resins containing 70 mol % or more of polyamide structural units composed of xylylenediamine and an α,ω-aliphatic dicarboxylic acid having 6 to 12 carbon atoms in the molecular chain can be used. Specific examples include homopolymers such as polymetaxylylene adipamide, polymetaxylylene pimelamide, polymetaxylylene azelamide, polyparaxylylene azelamide, and polyparaxylylene decanamide, and copolymers such as metaxylylene / paraxylylene adipamide copolymer, metaxylylene / paraxylylene pimelamide copolymer, metaxylylene / paraxylylene azelamide copolymer, and metaxylylene / paraxylylene sepacamide copolymer, but polymetaxylylene adipamide (hereinafter referred to as "MXD6") is preferred because it has excellent basic properties such as strength and gas barrier properties, and is relatively easy to obtain industrially.

[0030] The sealant layer can be formed from a resin with excellent heat-sealing properties. For example, the sealant layer can be formed from polyethylene (e.g., linear low-density polyethylene). The film constituting the sealant layer is preferably one that has linear cutability in the MD direction.

[0031] It is also preferable that at least one of the base layer and the sealant layer has linear cutting properties, because in this case, it is easier to tear the film 2 in a straight line. The thickness of the sealant layer is preferably at least twice the thickness of the base layer, and is preferably at least half the thickness of the entire film 2.

[0032] The film 2 can be formed by laminating a base layer having a thickness of 10 μm to 20 μm, for example 15 μm, an adhesive layer having a thickness of 10 μm to 30 μm, for example 20 μm, and a sealant layer having a thickness of 30 μm to 50 μm, for example 40 μm, and the film 2 typically has a thickness of 50 μm to 100 μm.

[0033] The substrate layer and the sealant layer are laminated and bonded together by an adhesive layer. For example, polyethylene can be used as the adhesive layer, and the substrate layer and the sealant layer can be bonded together using an extrusion lamination method. Alternatively, a material other than polyethylene can be used as the adhesive layer, and the substrate layer and the sealant layer can be bonded together using a dry lamination method. Alternatively, fusion bonding without an adhesive layer can be used. The film 2 formed from the substrate layer, adhesive layer, and sealant layer in this way has high strength, impact resistance, sealing properties, airtightness, etc.

[0034] 3. How to open packaging bag 1 When opening the packaging bag 1, the film 2 of the unsealing seal part 6 is torn along the easy unsealing part 6b from one side edge 1a side of the packaging bag 1. When the tear reaches the side edge 8a of the folding part 8, the film 2 of the folding part 8 is torn along the easy unsealing part 8b, and the tearing of the film 2 along the easy unsealing part 6b or its extension line is continued. When the tearing along the easy unsealing part 8b reaches the end point 8d on the side of the longitudinal seal part 7 of the easy unsealing part 8b, the film 2 of the longitudinal seal part 7 and the cylindrical body 3 is torn along the extension line of the easy unsealing part 8b as it is to open the packaging bag 1. Since the unsealing seal part 6 is continuously connected to the protruding seal part 9 in a plan view, the tearing at the easy unsealing part 6b and the tearing of the easy unsealing part 8b can be continuously performed, and the opening property is excellent. Also, when the film 2 has a linear cutability, it becomes easy to tear the packaging bag 1 along the extension lines of the easy unsealing parts 6b and 8b. Further, a part of the easy unsealing parts 6b and 8b may be overlapped and torn with each other.

[0035] 3. Bag-making and filling method Next, the bag-making and filling method using the film 2 will be described with reference to FIGS. 4 to 5. This method can be implemented using a vertical bag-making and filling machine 100.

[0036] <S1: Film bending process> First, the film 2 fed out from the roll-shaped original fabric F is guided to the former 112 through a plurality of feeding rolls 120 and 121. A sensor 119 is arranged in the path from the roll-shaped original fabric F to the former 112, and it detects the registration marks printed at regular intervals in the length direction on the film 2 so that a film 2 of a certain length can be sent out at regular time intervals on the track of the bag-making and filling machine 100. The film 2 is curved into a cylindrical shape while passing through the former 112, and the both side edge parts of the curved tip overlap with each other. An overlapping part is formed at the overlapping part.

[0037] <S2: Longitudinal sealing process> Next, the overlapping portion of the film 2 is heat-sealed by the longitudinal sealer 113 to form the longitudinal seal portion 7 and the protruding seal portion 9. The longitudinal sealer 113 includes a pair of seal rolls. In accordance with the timing of the film 2 moving at a constant time interval, while sandwiching the overlapping portion of the film 2 with the pair of seal rolls, the pair of seal rolls are rotated in opposite directions to each other to perform heat-sealing while feeding out the film 2. By forming the longitudinal seal portion 7 on the film 2, the cylindrical body 3 is formed. Further, after forming the longitudinal seal portion 7 and the protruding seal portion 9, the easy-opening portion 8b can be formed. The easy-opening portion 8b may be formed simultaneously with the easy-opening portion 6b in the cutting process described later.

[0038] <S3: Transverse Sealing Process> Next, by rotating the feed roll 114, the cylindrical body 3 is moved downstream by a predetermined length. As shown in FIG. 5, a predetermined position of the cylindrical body 3 is heat-sealed by the transverse sealer 116 to form the transverse seal portion 11 and the opening seal portion 6. The transverse seal portion 11 is configured by connecting the upper transverse seal portion 4 of the downstream packaging bag 1 and the lower transverse seal portion 5 of the upstream cylindrical body 3, and is divided vertically in the cutting process described later. The transverse sealer 116 includes a pair of seal bars 116a, and performs heat-sealing by sandwiching the above-mentioned predetermined position with the pair of seal bars 116a for a predetermined time.

[0039] <S4: Cutting Process> Next, by rotating the feed roll 114, the transverse seal portion 11 is moved to the position of the press-cutter 118. The press-cutter 118 includes a pair of bars 118a.

[0040] Next, the press-cutter 118 is closed to clamp and cool the horizontal seal portion 11, and the horizontal seal portion 11 is cut by a cutter blade (not shown) and divided vertically, thereby forming the upper horizontal seal portion 4 of the downstream packaging bag 1 and the lower horizontal seal portion 5 of the upstream cylindrical body 3. The downstream packaging bag 1 drops onto the conveyor 130 as the horizontal seal portion 11 is cut. In this step, the easy-open portion 6b can be formed. The easy-open portion 6b may be formed simultaneously when cutting the horizontal seal portion 11, or the horizontal seal portion 11 may be cut after forming the easy-open portion 6b.

[0041] <S5: Filling step> Next, when the squeezing roll 115 is opened, the content W that was introduced from the hopper 111 in the previous step and accumulated on the upper side of the squeezing roll 115 drops to the lower side of the squeezing roll 115. Since the lower horizontal seal portion 5 is formed on the cylindrical body 3, the dropped content W is filled into the cylindrical body 3. A forming device 123 is arranged around the cylindrical body 3 such that the outer shape of the cylindrical body 3 is defined when the peripheral surface of the cylindrical body 3 abuts against the forming device 123.

[0042] Next, the content W is further introduced into the cylindrical body 3, and when the content W in the cylindrical body 3 reaches the position of the sensor 122, the squeezing roll 115 is closed to divide the content W into an upper portion and a lower portion of the squeezing roll 115. The content in the lower portion of the squeezing roll 115 is the content for one bag of the packaging bag 1. Also, by closing the squeezing roll 115, an adhesion portion 3a is formed on the cylindrical body 3, and a bag portion 3b is formed between the adhesion portion 3a and the lower horizontal seal portion 5. The packaging bag 1 is formed by forming the upper horizontal seal portion 4 above the bag portion 3b.

[0043] <S6: Feeding step> Next, while keeping the squeezing roll 115 closed, the feeding roll 114 is rotated to move the adhesion portion 3a to the position of the horizontal sealer 116. Thereafter, by performing the horizontal seal step in the same manner as in S3, the horizontal seal portion 11 can be formed at a position (adhesion portion 3a) higher than the portion (bag portion 3b) filled with the content W.

[0044] Thereafter, by repeating steps S3 to S6, packaging bags 1 filled with contents W can be continuously produced.

[0045] The above steps produce a packaging bag 1 filled with the contents W. In the above embodiment, a pair of seal bars 116a is used to form the horizontal seal portion 11 where the horizontal seal portions 4, 5 are joined together and the open seal portion 6, but the horizontal seal portions 4, 5 and the open seal portion may be formed by separate seal bars, or the horizontal seal portion 4 and the horizontal seal portion 5 may be formed by separate seal bars. [Explanation of symbols]

[0046] 1: Packaging bag 1a: One side edge 1b: Main surface 2: Film 2a: Side edge 2b: Side edge 3: Cylindrical body 3a: Adhesion part 3b: Bag part 4: Upper horizontal seal 5: Lower horizontal seal 6: Opening seal 6a: Side edge 6b: 1st easy opening part 6c: end point 7: Vertical seal 8: Gassho part 8a: Side edge 8b: 2nd easy opening part 8c: end point 8d: End point 9: Protruding seal part 9a: Side edge 11: Horizontal seal section 100: Bag making and filling machine 111: Hopper 112:Former 113: Vertical sealing machine 114: Feed roll 115: Stroking Roll 116: Horizontal sealing machine 116a: Seal bar 118: Press and cutter 118a: Bar 119: Sensor 120: Feed roll 121: Feed roll 122: Sensor 123: Molding equipment 130: Conveyor F: Rolled raw material W: Contents

Claims

1. A packaging bag, The packaging bag includes a cylindrical body formed by forming a vertical seal portion on a film, an upper horizontal seal portion, a lower horizontal seal portion, and an opening seal portion, the upper horizontal seal portion is provided to close the upper side of the cylindrical body, the lower horizontal seal portion is provided to close the lower side of the cylindrical body, The opening seal portion is provided so as to extend from one side edge of the packaging bag, The vertical seal portion is provided at a joint portion where the inner surfaces of both side edge portions of the film overlap each other, The joint portion is bent toward the one side edge, The opening seal portion is provided with a first easy-open portion, The joint portion is provided with a second easy-open portion, The vertical seal portion is provided at a position spaced apart from a side edge of the joint portion, The joint portion is provided with a protruding seal portion that protrudes from the vertical seal portion toward a side edge of the joint portion, At least a part of the second easy-open portion is provided on the protruding seal portion, When the packaging bag is viewed in a plan view, the opening seal portion is continuous with the protruding seal portion, The opening seal portion is provided so as to extend from the one side edge and does not reach the base of the joining portion, The vertical seal portion, the protruding seal portion, and the opening seal portion are each strip-shaped, the opening seal portion is provided apart from the upper horizontal seal portion and the lower horizontal seal portion, When the packaging bag is viewed in a plan view, there is an unsealed region between the protruding seal portion and the upper and lower horizontal seal portions at the seam portion.

2. The packaging bag according to claim 1, The packaging bag, wherein the first and second easy-open portions are provided so as to be continuous when the packaging bag is seen in a plan view.

3. The packaging bag according to claim 1 or claim 2, A packaging bag, wherein the first and second easy-open portions are each formed by perforations.

4. The packaging bag according to any one of claims 1 to 3, A packaging bag in which the value of [left-right length of the second easy-open portion / left-right length of the folding portion] is 0.5 or more.

Images