Packaging bag and packaged item using the same

Abstract

To provide a packaging bag allowing easy going-out of air in the bag.SOLUTION: Provided is a pillow type packaging bag 20. A back face 22 has a vertical seal part 23 in which the center side end part of a first part 22A and the center side end part of a second part 22B are jointed in a principal rafter manner over the entire vertical direction LD. A front face 21 and the back face 22 have a horizontal seal region 24 over the entire lateral direction WD at both ends of the vertical direction LD. Between one horizontal seal region 24 and the other horizontal seal region 24, the front face 21 and the back face 22 are not jointed and a storing part 25 of a packaged object is formed. Any one or both horizontal seal regions 24 have a horizontal seal part 24S in which an inner face of the front face part 21 and an inner face of the back face 22 are jointed to leave a ventilation path 26 communicated with the inside and the outside of a packaging bag 20. A part or a whole part of the ventilation path 26 are provided over the horizontal direction WD of a joint initiating end 23e of the vertical seal part 23.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a packaging bag suitable for products such as disposable diapers, and a packaged article using the same. [Background technology]

[0002] When disposable diapers, sanitary napkins, and other products are packaged in pillow-type packaging using flexible packaging materials, the packaging bag is generally sealed while leaving air inside. Since a bag filled with air has no way for the air to escape and may swell or burst depending on the environment during storage or transportation of the product, it has also been proposed to form a sealed portion of the packaging bag while leaving a ventilation path in part (see, for example, Patent Document 1).

[0003] However, since the sealed portion of the packaging bag is formed by overlapping the opposing surfaces of two sheets and joining them by welding or the like, even if an air passage is formed without joining part of it, the air passage is the part where two flat sheets overlap, and in the initial state there is almost no gap, which causes the problem that air is difficult to escape. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-064606 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, a main object of the present invention is to provide a packaging bag that allows air to escape more easily from inside the bag. [Means for solving the problem]

[0006] The packaging bag that solves the above problems is as follows. <First aspect> It has a front portion formed of a soft packaging sheet and a back portion formed of a soft packaging sheet, The back surface portion has, over the entire longitudinal direction, a first portion extending from one side edge toward the center, a second portion extending from the other side edge toward the center, and a vertical seal portion in which the end portion of the first portion toward the center and the end portion of the second portion toward the center are joined in a palm-to-palm shape; The front and back portions have horizontal seal regions extending across the entire width at both ends in the vertical direction, The space between one of the horizontal seal areas and the other horizontal seal area is a space where the front part and the back part are not joined together, and serves as a space for accommodating the packaged item, One or both of the horizontal seal regions has a horizontal seal portion in which the inner surface of the front portion and the inner surface of the back portion are joined together so that an air passage communicating with the inside and outside of the packaging bag remains. A pillow-type packaging bag, A part or all of the air passage is provided so as to extend across both sides of the joining start end of the vertical seal portion in the lateral direction. A packaging bag characterized by:

[0007] (Action and effect) When the air vent passages formed in the horizontal seal area are partially or entirely arranged to extend across both sides of the joining start point of the vertical seal, as in this packaging bag, one of the ends of the first and second sections of vertical seal 23 is folded back, and the other extends over it, causing the other section to rise above the front section and form a roughly triangular gap. This allows air to escape more easily than when air vent passages are provided in other positions.

[0008] <Second aspect> the horizontal seal region has only one seal row, which is made up of a non-joined portion where the front portion and the back portion are not joined, and the horizontal seal portion continuing from both side edges of the non-joined portion to both side edges of the packaging bag, A part or all of the non-jointed portion in the vertical direction extends to both sides of the joining start end of the vertical seal portion in the horizontal direction, The air passage is formed only by the non-jointed portion. A packaging bag according to a first embodiment.

[0009] (Action and effect) The presence of such a horizontal seal region is particularly preferable since it allows air inside the bag to escape easily.

[0010] <Third aspect> One side of the air passage in the vertical direction spans both sides of the joining start end of the vertical seal portion in the horizontal direction, and the other side is spaced apart on one side of the joining start end of the vertical seal portion in the horizontal direction. The packaging bag according to the first or second aspect.

[0011] (Action and effect) This aspect is preferable because it allows air to escape easily from the packaging bag while preventing foreign matter from entering.

[0012] <Fourth aspect> the horizontal seal region has two rows of seals spaced apart in the vertical direction, each row including a non-joined portion where the front portion and the back portion are not joined, and the horizontal seal portions provided on both sides of the non-joined portion in the horizontal direction, The non-jointed portion of the first seal row extends across both sides of the joining start end of the vertical seal portion in the lateral direction, the non-bonded portion of the second seal row is provided only laterally than the non-bonded portion of the first seal row, and the horizontal seal portion of the second seal row extends to both sides in the horizontal direction beyond the non-bonded portion of the first seal row; Between the first seal row and the second seal row, a non-joined portion where the front portion and the back portion are not joined continues in a lateral direction at least from the non-joined portion of the first seal row to the non-joined portion of the second seal row, the non-bonded portion of the first seal row, the non-bonded portion of the second seal row, and the non-bonded portion located between the first seal row and the second seal row are continuous to form the ventilation path; A packaging bag according to a first embodiment.

[0013] (Action and effect) This aspect is preferable because it allows air to escape easily from the packaging bag while preventing foreign matter from entering.

[0014] <Fifth aspect> The minimum horizontal dimension of the air passage is 0.5 to 5 mm. The packaging bag according to any one of the first to fourth aspects.

[0015] (Action and effect) If the width of the ventilation passage is too wide, foreign matter will easily enter, so it is usually preferable that the width is within the range of this embodiment.

[0016] <Sixth aspect> The flexible packaging sheet has a bending stiffness in the longitudinal direction of 15 μN·m or more and 250 μN·m or less and a bending stiffness in the transverse direction of 5 μN·m or more and 120 μN·m or less, as measured in accordance with ISO 2493-1:2010 "Paper and paperboard - Bending resistance test method", The packaging bag according to any one of the first to fifth aspects.

[0017] (Action and effect) When pillow packaging is performed using a relatively rigid sheet such as the flexible packaging sheet of this embodiment, not only is air likely to remain in the packaging bag, but even if an air vent is provided as in the conventional example, the air vent is difficult to open and the air is difficult to escape. Therefore, the air vent along the vertical seal portion is very significant when using a relatively rigid flexible packaging sheet such as the present embodiment.

[0018] <Seventh aspect> The flexible packaging sheet has a paper layer and a thermoplastic resin layer provided on at least one side of the paper layer, and the weight ratio of the paper layer is 50% or more. The packaging bag according to any one of the first to sixth aspects.

[0019] (Action and effect) Flexible packaging sheets with a paper layer weight ratio of more than 50% not only reduce the use of synthetic resins, but also have the advantage of being able to display the "paper mark" under Japan's Resource Effective Utilization Promotion Act and being disposable like paper. However, flexible packaging sheets with a paper layer weight ratio of more than 50% are relatively rigid, and when pillow-wrapped, air tends to remain inside the packaging bag. Even if an air vent is provided as in conventional examples, the air vent is difficult to open and the air is difficult to escape. Therefore, the air vent along the vertical seal portion is very important when using a relatively rigid flexible packaging sheet such as this embodiment. Note that the paper layer refers to a sheet formed by papermaking using natural or recycled pulp as a fiber raw material, and does not include sheets made solely from non-biodegradable synthetic fibers.

[0020] <Eighth aspect> A packaging bag according to any one of the first to seventh aspects; and a disposable diaper contained in the packaging bag, The disposable diaper has a crotch region including a center in a front-to-rear direction, a front region located forward of the crotch region, a rear region located rearward of the crotch region, and a moisture indicator that changes color upon contact with moisture from body waste, the moisture indicator is provided in the crotch region and is not provided in the front region or the rear region; The disposable diaper is folded in half at the center in the front-to-rear direction and placed in the packaging bag such that the front-to-rear direction of the disposable diaper is the vertical direction of the packaging bag, The horizontal seal region farther from the fold line has the air passage, but the horizontal seal region closer to the fold line does not have the air passage. A packaging article characterized by:

[0021] (Action and effect) Because the above-mentioned packaging bag has a highly breathable air passage, when packaging a disposable diaper with a moisture indicator, if the disposable diaper is packaged with the moisture indicator portion close to the air passage, there is a risk that the moisture indicator will absorb moisture and discolor before use. Therefore, as in this embodiment, it is preferable to provide an air passage only in the horizontal seal region farthest from the moisture indicator and not in the horizontal seal region on the opposite side, thereby making it less likely that the moisture indicator will discolor before use. [Effects of the Invention]

[0022] The present invention provides advantages such as a packaging bag that allows air to escape more easily from inside the bag. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 2 is a rear view of a packaged article in which disposable diapers are packaged in a packaging bag. [Figure 2] FIG. 2 is a front view of a packaged article in which disposable diapers are packaged in a packaging bag. [Figure 3] 1(a) is a cross-sectional view taken along line 2-2 in FIG. 1, and FIG. 1(b) is a cross-sectional view taken along line 3-3 in FIG. [Figure 4] FIG. 2A is an enlarged plan view of a main part of the packaging bag, and FIG. 2B is an enlarged cross-sectional view of the main part of the packaging bag. [Figure 5] FIG. 1 is a perspective view of a packaged article in which disposable diapers are packaged in a packaging bag. [Figure 6] FIG. 2 is a rear view of a packaged article in which disposable diapers are packaged in a packaging bag. [Figure 7] 6(a) is a cross-sectional view taken along line 2-2 in FIG. 6, and FIG. 6(b) is a cross-sectional view taken along line 4-4 in FIG. [Figure 8] FIG. 2 is an enlarged plan view showing a main part of the packaging bag. [Figure 9] Both (a) and (b) are enlarged cross-sectional views showing the main parts. [Figure 10] FIG. 2 is an enlarged plan view showing a main part of the packaging bag. [Figure 11] FIG. 2 is an enlarged plan view showing a main part of the packaging bag. DETAILED DESCRIPTION OF THE INVENTION

[0024] 1 to 5 show an example of a packaged article 1 in which disposable diapers 10 are packaged in a packaging bag 20. The packaging bag 20 of this example is a pillow-type packaging bag having a front portion 21 formed of a soft packaging sheet and a back portion 22 formed of a soft packaging sheet. The back portion 22 has a first portion 22A extending from one side edge toward the center, a second portion 22B extending from the other side edge toward the center, and a vertical seal portion 23 formed by joining the central end of the first portion and the central end of the second portion in a palm-to-palm shape (i.e., with the inner surfaces facing each other) over the entire length in the longitudinal direction LD. The front portion 21 and the back portion 22 have horizontal seal regions 24 formed over the entire length in the transverse direction WD at both ends in the longitudinal direction LD, and the horizontal seal region 24 has a horizontal seal portion 24S formed by joining the inner surfaces of the front portion 21 and the back portion 22. Between one transverse seal region 24 and the other transverse seal region 24, the front portion 21 and the back portion 22 are not joined together, forming a storage portion 25 for the packaged item.

[0025] The packaging bag 20 can be produced using a known pillow packaging machine, and may be either a gusseted bag or a non-gusseted bag as long as it has a vertical seal portion 23 and a horizontal seal portion 24S. The vertical seal portion 23 and the horizontal seal portion 24S are flat portions formed by overlapping and joining the inner surfaces of flexible packaging sheets. In the case of a gusseted bag, as shown in FIG. 3, the number of layers of sheets stacked in the horizontal seal region 24 is four in the portion with the vertical seal portion 23: first portion 22A, second portion 22B, front portion 21, and back portion 22, and two in the other portions: front portion 21 and back portion 22. In the case of a gusseted bag, although not shown, the number of layers of sheets in the horizontal seal area 24 is four in the portion having the vertical seal portion 23: the first portion 22A, the second portion 22B, the front portion 21, and the back portion 22; four in the gusset portion: the folded portion of the front portion 21 and the folded portion of the back portion 22; and two in the other portions: the front portion 21 and the back portion 22. As shown in Fig. 3, the vertical seal portion 23 is folded toward the first portion 22A (or may be toward the second portion 22B), and the portion overlapping with the horizontal seal area may be welded to the opposing surface, or may not be welded as shown in Fig. 7.

[0026] The joining method for the vertical seal portion 23 and the horizontal seal portion 24S can be appropriately selected from known welding methods such as heat sealing, hot air heat sealing, fusion sealing, impulse sealing, ultrasonic sealing, high-frequency induction heating sealing, high-frequency sealing, and laser heating, depending on the type of packaging machine and the material of the flexible packaging sheet. Instead of welding, adhesives or pressure-sensitive adhesives can also be used to form at least one of the vertical seal portion 23 and the horizontal seal portion 24S. The dimension of the horizontal seal portion 23 in the horizontal direction WD can be appropriately determined, for example, to about 1 to 10 mm. The dimension of the horizontal seal region 24 in the vertical direction LD can be appropriately determined, for example, to about 1 to 10 mm.

[0027] The flexible packaging sheet forming the packaging bag 20 can be made of any known material without any particular limitations. For example, resin films such as polyethylene (PE) and PE-ethylene vinyl alcohol copolymer (EVOH)-PE laminates (PE / EVOH / PE) can be used, as well as paper sheets having a paper layer and a thermoplastic resin layer for adhesion provided on at least one side of the paper layer. The thickness of the flexible packaging sheet can be determined as appropriate. For example, when PE or PE / EVOH / PE is used as the resin film, the thickness of the resin film can be 10 to 70 μm, preferably 15 to 60 μm, and more preferably 20 to 50 μm. The thickness of the paper sheet can be, for example, 15 to 80 μm, more preferably 25 to 60 μm.

[0028] As is well known, the transverse seal area 24 may be formed with holes or slits for hanging on hooks or fingers, or perforations for forming these.

[0029] Characteristically, the vertical seal portion 23 is continuous over the entire length in the vertical direction LD, whereas the horizontal seal region 24 has a horizontal seal portion 24S where the inner surface of the front portion 21 and the inner surface of the back portion 22 are joined together so as to leave an air passage 26 connecting the inside and outside of the packaging bag 20, as shown in the enlarged view of Fig. 4(a), and part or all of the air passage 26 is provided so as to extend on both sides in the horizontal direction WD of the joint start end 23e of the vertical seal portion 23. In this way, when part or all of the air passage 26 formed in the horizontal seal region 24 is provided so as to extend on both sides in the horizontal direction WD of the joint start end 23e of the vertical seal portion 23, the first portion 22A of the vertical seal portion 23 is folded back and the second portion 22B extends so as to ride on top of it, and as a result, the end of the second portion 22B rises from the front portion 21, forming a substantially triangular gap, as shown in the enlarged view of Fig. 4(b). The opposite occurs when the vertical seal portion 23 is folded back toward the second portion 22B, but in either case, a gap is formed, which allows the air inside the packaging bag 20 to escape more easily than when the ventilation path 26 is provided in a position other than this.

[0030] The air passage 26 is formed by partially not joining the front portion 21 (the soft packaging sheet constituting the front portion 21) and the back portion 22 (the soft packaging sheet constituting the back portion 22) in the horizontal seal region 24, and is a gap between the front portion 21 and the back portion 22. As shown in FIG. 4(a), the air passage 26 has a first opening 26a that opens into the interior of the packaging bag 20 on the side of the storage compartment 25 of the horizontal seal region 24, and a second opening 26b that opens to the outside of the packaging bag 20 on the opposite side of the horizontal seal region 24. When the horizontal seal region 24 is formed up to the cut edge of the packaging bag 20, the second opening 26b will be located at the cut edge of the packaging bag 20, and when the horizontal seal region 24 is spaced inward from the cut edge of the packaging bag 20, the second opening 26b will be located inside the cut edge of the packaging bag 20. The air passage 26 may extend linearly or curvedly along the longitudinal direction LD as shown in FIG. 2. Furthermore, as shown in Figures 1 to 4, the ventilation path 26 may extend through the horizontal seal region 24 without branching, or as shown in Figure 6, it may branch within the horizontal seal region 24 and extend in a maze-like pattern.

[0031] As an example, as shown in Figure 1, the horizontal seal area 24 has only one seal row consisting of a non-joined portion 27 where the front portion 21 and the back portion 22 are not joined on both sides of the joining start end 23e of the vertical seal portion 23 in the horizontal direction WD, and a horizontal seal portion 24S that continues from both side edges of this non-joined portion 27 to both side edges of the packaging bag 20, and it is preferable that the air passage 26 is formed only by the non-joined portion 27 of this seal row, as this makes it particularly easy for air to escape from inside the packaging bag 20.

[0032] 6 to 9, the horizontal seal region 24 may have a plurality of seal rows spaced apart in the longitudinal direction LD, each row including a non-bonded portion 27 where the front portion 21 and the back portion 22 are not bonded, and horizontal seal portions 24S provided on both sides of the non-bonded portion 27 in the horizontal direction WD. In particular, in the illustrated example, there are two seal rows 241, 242, and the non-bonded portion 27 provided in the first seal row 241 extends to both sides of the bond starting end 23e of the vertical seal portion 23 in the horizontal direction WD. The non-bonded portion 27 provided in the second seal row 242 is only provided laterally of the non-bonded portion 27 of the first seal row 241, and the horizontal seal portions 24S of the second seal row 242 extend to both sides of the non-bonded portion 27 of the first seal row 241 in the horizontal direction WD. Furthermore, between the first seal row 241 and the second seal row 242, a non-bonded portion 27, where the front portion 21 and the back portion 22 are not bonded, continues in the horizontal direction WD from at least the non-bonded portion 27 of the first seal row 241 to the non-bonded portion 27 of the second seal row 242, and the non-bonded portion 27 located between the first seal row 241 and the second seal row 242 are continuous to form an air passage 26. In the example shown in FIGS. 6 to 9, the first seal row 241 is located outside the second seal row 242 in the vertical direction, but conversely, as shown in FIG. 10, the second seal row 242 may be located outside the first seal row 241 in the vertical direction. In this way, having two rows of seals 241, 242 with the non-jointed portions 27 offset in the horizontal direction WD is preferable in that it reduces the risk of foreign matter entering, compared to the example shown in Figure 1, in which the inside and outside of the packaging bag 20 are directly connected by a single air passage 26 located in the vertical seal.

[0033] The width of the ventilation path 26 can be determined as appropriate, but if the width of the ventilation path 26 is too wide, foreign matter will easily enter. Therefore, in the illustrated example, the minimum dimension of the ventilation path 26 in the horizontal direction WD is preferably 0.5 to 5 mm. The dimension of the ventilation path 26 in the horizontal direction WD may be constant in the vertical direction LD (see FIG. 1) or may vary depending on the position in the vertical direction LD (see FIGS. 6, 10, and 11). Furthermore, the distance between both side edges of the ventilation path 26 and the joining start end 23e of the vertical seal portion 23 (maximum distance if it varies) is preferably 3 to 15 mm.

[0034] The number of ventilation channels 26 per horizontal seal region 24 may be one or more. That is, as long as the ventilation channel 26 includes a portion extending across both sides of the joint start end 23e of the vertical seal portion 23 in the horizontal direction WD, the ventilation channel 26 may be located at a position that does not overlap the vertical seal portion 23. As shown in FIG. 1, it is preferable for the entire ventilation channel 26 to extend across both sides of the joint start end 23e of the vertical seal portion 23 in the horizontal direction WD, as this improves breathability. However, as shown in FIGS. 8 and 10, one side of the ventilation channel 26 in the vertical direction LD may extend across both sides of the joint start end 23e of the vertical seal portion 23 in the horizontal direction WD, and the opposite side may be spaced apart from the joint start end 23e of the vertical seal portion 23 in the horizontal direction WD. The example shown in FIG. 1 may be modified to have a similar structure by tilting (or bending) the ventilation channel 26 with respect to the vertical direction LD, as shown in FIG. 11. In particular, it is preferable that the first opening 26a of the air passage 26 is on one side of the vertical direction LD of the air passage 26 and on both sides of the horizontal direction WD of the joint starting end 23e of the vertical seal portion 23, and the second opening 26b is away from one side of the joint starting end 23e of the vertical seal portion 23 in the horizontal direction WD, because this allows air to escape easily from inside the bag while making it difficult for foreign objects to enter.

[0035] It is preferable to use a low-rigidity flexible packaging sheet for the packaging bag 20 to perform pillow packaging, since air is less likely to remain inside the packaging bag 20. In contrast, if pillow packaging is performed using a sheet with a bending stiffness in the machine direction (LD) of 15 μN·m to 250 μN·m (particularly, 20 μN·m to 130 μN·m) and a bending stiffness in the cross direction (WD) of 5 μN·m to 120 μN·m (particularly, 10 μN·m to 100 μN·m), as measured in accordance with ISO 2493-1:2010 "Paper and paperboard -- Test method for bending resistance," not only is air more likely to remain inside the packaging bag 20, but even if a conventional air vent 26 is provided, the air vent 26 is difficult to open and the air is less likely to escape. Therefore, the air vent 26 along the vertical seal portion 23 described above is particularly significant when using such a relatively rigid flexible packaging sheet. For example, flexible packaging sheets with a paper layer weight ratio of more than 50% not only reduce the use of synthetic resins, but also have the advantage of being able to display the "paper mark" under Japan's Resource Effective Utilization Promotion Act and being disposable like paper. However, flexible packaging sheets with a paper layer weight ratio of more than 50% are relatively rigid. Therefore, when a flexible packaging sheet has a paper layer containing pulp fibers and a thermoplastic resin layer provided on at least one side of the paper layer, and the paper layer weight ratio is 50% or more, it is particularly important to provide an air vent 26 along the vertical seal portion 23. Note that the paper layer refers to a sheet formed by papermaking using natural or recycled pulp as the fiber raw material, and does not include sheets formed solely from non-biodegradable synthetic fibers.

[0036] It is preferable to form the air vents 26 in both transverse seal regions 24 because this allows air to escape easily. However, it is also possible to form the air vents 26 in only one of the transverse seal regions 24 and not in the other transverse seal region 24. For example, because the above-mentioned packaging bag 20 has high breathability in the air vents 26, when individually packaging disposable diapers 10 having moisture indicators 10i that change color upon contact with moisture from body waste (the same applies when packaging multiple disposable diapers 10 together), if the portion of the disposable diapers 10 having the moisture indicators 10i is packaged so that they are close to the air vents 26, there is a risk that the moisture indicators 10i will absorb moisture and discolor before use. Therefore, it is preferable to provide the air vents 26 only in the transverse seal region 24 farthest from the moisture indicators 10i and not in the transverse seal region 24 on the opposite side, thereby making it less likely that the moisture indicators 10i will discolor before use. Specifically, the disposable diaper 10 has a crotch region including the center in the front-to-back direction, a front region located forward of the crotch region, and a rear region located rearward of the crotch region, the moisture indicator 10i is provided in the crotch region but not in the front region or the rear region, the disposable diaper 10 is folded in half at the center in the front-to-back direction and contained in the packaging bag 20 such that the front-to-back direction of the disposable diaper 10 is the longitudinal direction LD of the packaging bag 20, and it is preferred that the horizontal seal region 24 farther from the fold has an air vent 26, but the horizontal seal region 24 closer to the fold does not have an air vent 26. Although not shown, the disposable diaper 10 has an absorber provided in the crotch region, a liquid-permeable top sheet provided on the front side of the absorber, and a liquid-impermeable sheet provided on the back side of the absorber, and the moisture indicator 10i is generally provided between the absorber and the liquid-impermeable sheet.

[0037] <Explanation of terms used in the specification> In the present specification, the following terms have the following meanings unless otherwise specified in the specification.

[0038] The "longitudinal direction" refers to the direction indicated by the symbol LD in the drawing, and the "lateral direction" refers to the direction indicated by the symbol WD in the drawing, and the longitudinal direction and the lateral direction are perpendicular to each other.

[0039] "Front" means the side without a vertical seal, and "rear" means the side with a vertical seal.

[0040] "Thickness" is measured in accordance with the provisions of JIS P 8118 (2014).

[0041] Unless otherwise specified, the dimensions of each part of the packaging bag refer to the dimensions when the contents have been removed and when the bag is in an unfolded state (unfolded flat with no slack) rather than in its natural length.

[0042] If no environmental conditions are specified for a test or measurement, the test or measurement shall be carried out in a test room or device under standard conditions (temperature of 23±1°C, relative humidity of 50±2%). [Industrial Applicability]

[0043] The present invention is suitable for packaging absorbent articles such as disposable diapers and sanitary napkins, and sanitary paper products such as tissue paper, toilet paper, and kitchen paper, but can also be used for packaging any other packaging object. However, when packaging textile products that can be compressed by external pressure in a packaging bag, air tends to get trapped and there is a risk of the product bursting due to external pressure, so the present invention can be said to be particularly suitable for packaging such products. [Explanation of symbols]

[0044] 1...packaged item, 10...disposable diaper, 10i...moisture indicator, 21...front portion, 22...back portion, LD...longitudinal direction, WD...horizontal direction, 20...packaging bag, 23...vertical seal portion, 24...horizontal seal area, 24S...horizontal seal portion, 25...storage portion, 26...ventilation channel, 23e...joining start end, 22A...first portion, 22B...second portion, 26a...first opening, 26b...second opening, 27...non-joined portion.

Claims

1. It has a front portion formed of a soft packaging sheet and a back portion formed of a soft packaging sheet, the back surface portion has, over the entire longitudinal direction, a first portion extending from one side edge toward the center, a second portion extending from the other side edge toward the center, and a vertical seal portion in which the end portion of the first portion toward the center and the end portion of the second portion toward the center are joined in a palm-to-palm manner; The front and back portions have horizontal seal regions extending across the entire width at both ends in the vertical direction, The space between one of the horizontal seal areas and the other horizontal seal area is a space where the front part and the back part are not joined together, and serves as a space for accommodating the packaged item, One or both of the horizontal seal regions has a non-joined portion, which is left so as to continue from the storage portion side to the opposite side of the storage portion, and in which the front portion and the back portion are not joined, and a horizontal seal portion, in which the inner surface of the front portion and the inner surface of the back portion are joined, The non-jointed portion forms an air passage that communicates with the inside and outside of the packaging bag. A pillow-type packaging bag, A part or all of the air passage is provided so as to extend across both sides of the joining start end of the vertical seal portion in the lateral direction. A packaging bag characterized by:

2. the horizontal seal region has only one seal row, the row being made up of the non-joined portion and the horizontal seal portion continuing from both side edges of the non-joined portion to both side edges of the packaging bag; A part or all of the non-jointed portion in the vertical direction extends to both sides of the joining start end of the vertical seal portion in the horizontal direction, The air passage is formed only by the non-jointed portion. The packaging bag according to claim 1.

3. A package having a front portion formed by a soft packaging sheet and a back portion formed by a soft packaging sheet, the back surface portion has, over the entire longitudinal direction, a first portion extending from one side edge toward the center, a second portion extending from the other side edge toward the center, and a vertical seal portion in which the end portion of the first portion toward the center and the end portion of the second portion toward the center are joined in a palm-to-palm manner; The front and back portions have horizontal seal regions extending across the entire width at both ends in the vertical direction, The space between one of the horizontal seal areas and the other horizontal seal area is a space where the front part and the back part are not joined together, and serves as a space for accommodating the packaged item, One or both of the horizontal seal regions has a horizontal seal portion in which the inner surface of the front portion and the inner surface of the back portion are joined together so that an air passage communicating with the inside and outside of the packaging bag remains. A pillow-type packaging bag, A part or all of the ventilation path is provided so as to extend across both sides of the joining start end of the vertical seal portion in the lateral direction, One side of the air passage in the vertical direction spans both sides of the joining start end of the vertical seal portion in the horizontal direction, and the other side is spaced apart on one side of the joining start end of the vertical seal portion in the horizontal direction. A packaging bag characterized by:

4. A package having a front portion formed by a soft packaging sheet and a back portion formed by a soft packaging sheet, the back surface portion has, over the entire longitudinal direction, a first portion extending from one side edge toward the center, a second portion extending from the other side edge toward the center, and a vertical seal portion in which the end portion of the first portion toward the center and the end portion of the second portion toward the center are joined in a palm-to-palm manner; The front and back portions have horizontal seal regions extending across the entire width at both ends in the vertical direction, The space between one of the horizontal seal areas and the other horizontal seal area is a space where the front part and the back part are not joined together, and serves as a space for accommodating the packaged item, One or both of the horizontal seal regions has a horizontal seal portion in which the inner surface of the front portion and the inner surface of the back portion are joined together so that an air passage communicating with the inside and outside of the packaging bag remains. A pillow-type packaging bag, A part or all of the ventilation path is provided so as to extend across both sides of the joining start end of the vertical seal portion in the lateral direction, the horizontal seal region has two rows of seals spaced apart in the vertical direction, each row including a non-joined portion where the front portion and the back portion are not joined, and the horizontal seal portions provided on both sides of the non-joined portion in the horizontal direction, the non-jointed portion of the first seal row extends across both sides of the joining start end of the vertical seal portion in the lateral direction, the non-bonded portion of the second seal row is provided only laterally than the non-bonded portion of the first seal row, and the horizontal seal portion of the second seal row extends to both sides in the horizontal direction beyond the non-bonded portion of the first seal row; a non-joined portion, where the front portion and the back portion are not joined, between the first seal row and the second seal row continues in a lateral direction at least from the non-joined portion of the first seal row to the non-joined portion of the second seal row; the non-bonded portion of the first seal row, the non-bonded portion of the second seal row, and a non-bonded portion located between the first seal row and the second seal row are continuous to form the ventilation path; A packaging bag characterized by:

5. The minimum lateral dimension of the air passage is 0.5 to 5 mm; The packaging bag according to any one of claims 1 to 4.

6. The flexible packaging sheet has a bending stiffness in the longitudinal direction of 15 μN m or more and 250 μN m or less and a bending stiffness in the transverse direction of 5 μN m or more and 120 μN m or less, as measured in accordance with ISO 2493-1:2010 "Paper and paperboard - Bending resistance test method", The packaging bag according to any one of claims 1 to 5.

7. The flexible packaging sheet has a paper layer and a thermoplastic resin layer provided on at least one side of the paper layer, and the weight ratio of the paper layer is 50% or more. The packaging bag according to any one of claims 1 to 6.

8. A pillow-type packaging bag; and a disposable diaper contained in the packaging bag, The packaging bag has a front portion formed of a soft packaging sheet and a back portion formed of a soft packaging sheet, the back surface portion has, over the entire longitudinal direction, a first portion extending from one side edge toward the center, a second portion extending from the other side edge toward the center, and a vertical seal portion in which the end portion of the first portion toward the center and the end portion of the second portion toward the center are joined in a palm-to-palm manner; The front and back portions have horizontal seal regions extending across the entire width at both ends in the vertical direction, The space between one of the horizontal seal areas and the other horizontal seal area is a space where the front part and the back part are not joined together, and serves as a space for accommodating the packaged item, One or both of the horizontal seal regions has a horizontal seal portion in which the inner surface of the front portion and the inner surface of the back portion are joined together so that an air passage communicating with the inside and outside of the packaging bag remains, A part or all of the ventilation path is provided so as to extend across both sides of the joining start end of the vertical seal portion in the lateral direction, The disposable diaper has a crotch region including a center in a front-to-rear direction, a front region located forward of the crotch region, a rear region located rearward of the crotch region, and a moisture indicator that changes color upon contact with moisture from body waste, the moisture indicator is provided in the crotch region and is not provided in the front region or the rear region; The disposable diaper is folded in half at the center in the front-to-rear direction and placed in the packaging bag such that the front-to-rear direction of the disposable diaper is the vertical direction of the packaging bag, The horizontal seal region farther from the fold line has the air passage, but the horizontal seal region closer to the fold line does not have the air passage. A packaging article characterized by:

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