packaging bags

Abstract

To provide a packaging bag that can suppress the deterioration of the appearance of stored items as they are taken out and that is highly convenient.SOLUTION: A packaging bag 10 according to the present invention has a hexahedral shape comprising a front portion 11, a back portion 12, a top portion 13, a bottom portion 14, a first side portion 15, and a second side portion 16. The packaging bag includes: a first perforation 21 formed in the top portion 13 and defining a part of the top portion 13 between the front portion 11 and the boundary line 31 of the top portion 13; a second perforation 22 where one end 22a connects to the first perforation 21 and extends to a midway position in a height direction Z of the front portion 11 toward the bottom portion 14; a third perforation 23 where one end 23a connects to the first perforation 21 and extends to a midway position in the height direction Z of the front portion 11 toward the bottom portion 14; and a fourth perforation 24 that continues from the first side portion 15 through the back portion 12 to the second side portion 16, with one end 24a connected to the second perforation 22, and the other end 24b connected to the third perforation 23.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Conventionally, there is known a hexahedral packaging bag having a cutting line on the periphery that separates the bag into two article storage sections (see, for example, Patent Document 1).Also known is a hexahedral packaging bag having a first perforation that crosses one side section, passes through the front section, and reaches the top section, and a second perforation that is provided below the first perforation, and the first and second perforations are continuous in a U-shape on the top section (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-290357 [Patent Document 2] Japanese Patent Application Publication No. 11-91801 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the packaging bag described in Patent Document 1 has the problem that it is difficult to store and use in a small space because the storage bag is unfolded by separating it into two item storage sections, making it difficult to use. Furthermore, the packaging bag described in Patent Document 2 is opened by tearing the packaging bag at the first and second perforations, so an opening is formed on the side of the packaging bag. This causes the problem that the hexahedral shape of the packaging bag gradually collapses as the stored items are removed, making it unattractive. Furthermore, the collapse of the hexahedral shape also causes the problem that it becomes difficult to remove the items.

[0005] The present invention has been made in light of the above-mentioned problems, and aims to provide a highly convenient packaging bag that prevents deterioration in appearance due to removal of stored items. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a packaging bag having a hexahedral shape consisting of a front portion and a back portion opposed to each other, a top portion and a bottom portion opposed to each other, and a first side portion and a second side portion opposed to each other, which contains a predetermined item and is opened by tearing perforations provided on the periphery, wherein the perforations include: a first perforation formed in the top portion and partitioning a part of the top portion between a boundary line between the front portion and the top portion; a second perforation having one end connected to the first perforation and extending toward the bottom portion to a position midway in the height direction of the front portion; a third perforation having one end connected to the first perforation and extending toward the bottom portion to a position midway in the height direction of the front portion; and a fourth perforation formed continuously from the first side portion through the back portion to the second side portion, and having one end connected to the second perforation and the other end connected to the third perforation. The first perforation has a first side portion extending along the boundary line between the top surface portion and the first side surface portion, a second side portion extending along the boundary line between the top surface portion and the second side surface portion, and an intermediate portion having one end connected to the first side portion and the other end connected to the second side portion. The structure was as follows. [Effects of the Invention]

[0007] As a result, the packaging bag of the present invention can prevent deterioration of the appearance of the bag when the contents are removed, and can also provide high convenience. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic perspective view showing the appearance of a packaging bag of Example 1. FIG. [Figure 2] FIG. 2 is an explanatory view showing a state in which an absorbent article is housed in the packaging bag of the first embodiment. [Figure 3] 1 is a plan view showing the top surface of the packaging bag of Example 1. FIG. [Figure 4] FIG. 2 is an enlarged view showing part A in FIG. [Figure 5]FIG. 2 is an enlarged view showing part B in FIG. [Figure 6] 2(a) is an enlarged side view of part C in FIG. 1, and (b) is an enlarged perspective view of part C in FIG. [Figure 7] (a) is an explanatory diagram showing a first step of the manufacturing method of the packaging bag of Example 1. (b) is an explanatory diagram showing valley fold lines and mountain fold lines set in a synthetic resin sheet. (c) is an explanatory diagram showing a second step of the manufacturing method of the packaging bag of Example 1. (d) is an explanatory diagram showing a third step of the manufacturing method of the packaging bag of Example 1. [Figure 8] 1 is a perspective view showing the state in which the first perforation of the packaging bag of Example 1 has been broken. [Figure 9] 1 is a perspective view showing the state in which the second and third perforations of the packaging bag of Example 1 have been broken. FIG. [Figure 10] 1 is a perspective view showing the packaging bag of Example 1 in a state where the fourth perforation has been broken. FIG. [Figure 11] 1 is an explanatory diagram showing a state in which the packaging bag of Example 1 is used, with the front part covering the contents. [Figure 12] FIG. 10 is a schematic perspective view showing the appearance of a packaging bag of a first modified example. [Figure 13] FIG. 10 is a schematic perspective view showing the appearance of a packaging bag of a second modified example. [Figure 14] FIG. 10 is an explanatory diagram showing a state in which the packaging bag of the second modified example is used. [Figure 15] FIG. 10 is an explanatory diagram showing a first perforation of a first modified example. [Figure 16] FIG. 10 is a schematic perspective view showing the appearance of a packaging bag of a third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] A mode for carrying out the packaging bag of the present invention will be described based on Example 1 shown in the drawings.

[0010] The packaging bag 10 of Example 1 is a flexible bag that stores a plurality of predetermined articles such as disposable paper diapers, absorbent pads for light incontinence, and sanitary products (hereinafter referred to as "absorbent articles 100," see FIG. 2). As shown in FIG. 1, the packaging bag 10 has a hexahedral shape consisting of a front surface 11, a back surface 12, a top surface 13, a bottom surface 14, a first side surface 15, and a second side surface 16. The front surface 11 and the back surface 12 face each other, the top surface 13 and the bottom surface 14 face each other, and the first side surface 15 and the second side surface 16 face each other. The top surface 13, the bottom surface 14, the first side surface 15, and the second side surface 16 are perpendicular to the front surface 11 and the back surface 12. Furthermore, the front surface portion 11, the back surface portion 12, the first side surface portion 15, and the second side surface portion 16 are perpendicular to the top surface portion 13 and the bottom surface portion 14. Furthermore, the front surface portion 11, the back surface portion 12, the top surface portion 13, and the bottom surface portion 14 are perpendicular to the first side surface portion 15 and the second side surface portion 16.

[0011] In the following description, the direction in which the front portion 11 and the back portion 12 face each other is referred to as the "depth direction X," the direction in which the first side portion 15 and the second side portion 16 face each other is referred to as the "width direction Y," and the direction in which the top portion 13 and the bottom portion 14 face each other is referred to as the "height direction Z."

[0012] 2, the packaging bag 10 of Example 1 contains a plurality of absorbent articles 100 arranged upright in the width direction Y and stacked in two layers in the height direction Z. Here, the packaging bag 10 is formed from a flexible synthetic resin sheet such as polyethylene. The packaging bag 10 becomes a hexahedron when the absorbent articles 100 are contained therein.

[0013] Furthermore, the packaging bag 10 of Example 1 has an arbitrary design, including a product name, instructions, etc., applied to its outer surface, and has perforations 20 formed thereon for opening. The perforations 20 are formed by small holes or cuts arranged continuously in a line. The synthetic resin sheet is cut along the perforations 20 by tearing the perforations 20. Note that "tearing the perforations 20" means tearing the uncut portion between two adjacent small holes (cuts). The packaging bag 10 is opened as a result of the synthetic resin sheet being cut along the perforations 20.

[0014] As shown in FIG. 1, the perforation 20 of the first embodiment includes a first perforation 21, a second perforation 22, a third perforation 23, and a fourth perforation 24.

[0015] The first perforation 21 is formed on the top surface 13. As shown in FIG. 3, the first perforation 21 of the first embodiment has a first side portion 21a, a second side portion 21b, and a middle portion 21c.

[0016] The first side portion 21a is a perforation that extends linearly along the boundary line (hereinafter referred to as the "third boundary line 33") between the top surface portion 13 and the first side surface portion 15 in the vicinity of the boundary line. Here, the first side portion 21a extends from the boundary line (hereinafter referred to as the "first boundary line 31") between the front surface portion 11 and the top surface portion 13 to the boundary line (hereinafter referred to as the "second boundary line 32") between the back surface portion 12 and the top surface portion 13. The "position in the vicinity of the third boundary line 33" refers to a position where the distance in the width direction Y from the third boundary line 33 to the first side portion 21a is shorter than the thickness of the absorbent article 100.

[0017] Furthermore, a high-strength region α (shown surrounded by a dashed line in FIGS. 3 and 4) is set in the top surface portion 13 within a predetermined range from the first boundary line 31. The first side portion 21a is set so that the breaking strength in the high-strength region α is stronger than the breaking strength in the region other than the high-strength region α (hereinafter referred to as the "general region"). In order to set the breaking strength to a higher strength, the spacing between the small holes in the first side portion 21a in the high-strength region α is wider than the spacing between the small holes in the first side portion 21a in the general region, as shown in FIG.

[0018] The second side portion 21b is a perforation that extends linearly along the boundary line (hereinafter referred to as the "fourth boundary line 34") between the top surface portion 13 and the second side surface portion 16 in the vicinity of the boundary line. Here, the second side portion 21b extends from the first boundary line 31 to the second boundary line 32. Note that the "position in the vicinity of the fourth boundary line 34" refers to a position where the distance in the width direction Y from the fourth boundary line 34 to the second side portion 21b is shorter than the thickness of the absorbent article 100.

[0019] Similarly, the breaking strength of the high-strength region α of the second side portion 21b set on the top surface 13 is set to be stronger than the breaking strength of the general region. Similarly to the first side portion 21a, the spacing between the small holes in the high-strength region α of the second side portion 21b is set wider than the spacing between the small holes in the general region to increase the breaking strength. The breaking strength of the general region of the second side portion 21b is set to be approximately the same as the breaking strength of the general region of the first side portion 21a.

[0020] The intermediate portion 21c is formed in the center of the top surface portion 13 in the depth direction X and extends along the width direction Y. The intermediate portion 21c is a perforation that connects one end to the first side portion 21a and the other end to the second side portion 21b. Note that "connected perforations" means that the spacing between the two perforations is set to be approximately the same as the spacing between the small holes that make up each perforation, maintaining the continuity of the small holes. Therefore, when two connected perforations are broken, the portion cut by one perforation and the portion cut by the other perforation merge into one, forming a larger cut portion.

[0021] The breaking strength of the middle portion 21c is constant over the entire length and is set to be approximately the same as the breaking strength of the general regions of the first side portion 21a and the second side portion 21b.

[0022] As described above, first perforation 21 has first side portion 21a and second side portion 21b that both extend from first boundary line 31 to second boundary line 32, and has intermediate portions 21c that connect between first side portion 21a and second side portion 21b. Therefore, a portion of top surface 13 is surrounded by first perforation 21 and first boundary line 31. In other words, first perforation 21 defines a portion of top surface 13 between itself and first boundary line 31.

[0023] The second perforation 22 is formed in the front portion 11 and extends linearly along the boundary line (hereinafter referred to as the "fifth boundary line 35") between the front portion 11 and the first side portion 15 at a position near the boundary line. One end 22a of the second perforation 22 is connected to the first side portion 21a of the first perforation 21, and extends to a midpoint in the height direction Z of the front portion 11 toward the bottom portion 14. In Example 1, the "midpoint" is defined as a position approximately equivalent to the upper end of the absorbent article 100 located in the lower tier (see FIG. 2). The "nearby the fifth boundary line 35" is defined as a position where the distance in the width direction Y from the fifth boundary line 35 to the second perforation 22 is shorter than the thickness of the absorbent article 100.

[0024] Furthermore, a high-strength region α (shown by a dashed line in FIG. 3) is set in the front portion 11 within a predetermined range from the first boundary line 31. The second perforations 22 are set so that the breaking strength in the high-strength region α is stronger than the breaking strength in regions other than the high-strength region α (hereinafter referred to as "general regions"). In order to set the breaking strength to a higher strength, the spacing between the small holes of the second perforations 22 in the high-strength region α is wider than the spacing between the small holes of the second perforations 22 in the general region, as shown in FIG. 4.

[0025] The second perforation 22 has a second linear portion 22c (shown by a dashed line in FIG. 1 ) extending along the fifth boundary line 35 within a predetermined range from the other end 22b on the bottom surface portion 14 side. The second perforation 22 in Example 1 extends along the fifth boundary line 35 over its entire length, and the entire length is the "second linear portion 22c." The length L1 of the second linear portion 22c (the entire length of the second perforation 22 in Example 1) is set to be longer than the length L3 from the fifth boundary line 35 to the boundary line between the back surface portion 12 and the first side surface portion 15 (hereinafter referred to as the "seventh boundary line 37"). In Example 1, the length L1 is set to be approximately the same as the length in the height direction Z of the absorbent article 100.

[0026] The third perforation 23 is formed in the front portion 11 and extends linearly along the boundary line (hereinafter referred to as the "sixth boundary line 36") between the front portion 11 and the second side portion 16 at a position near the boundary line. One end 23a of the third perforation 23 is connected to the second side portion 21b of the first perforation 21, and extends to a midpoint in the height direction Z of the front portion 11 toward the bottom portion 14. In Example 1, the "midpoint" is defined as a position approximately equivalent to the upper end of the absorbent article 100 located in the lower tier (see FIG. 2). The "nearby the sixth boundary line 36" is defined as a position where the distance in the width direction Y from the sixth boundary line 36 to the third perforation 23 is shorter than the thickness of the absorbent article 100.

[0027] Similarly, the breaking strength of the third perforation 23 in the high-strength region α set in the front portion 11 is set to be stronger than the breaking strength in the general region. Note that, in the third perforation 23, in order to increase the breaking strength, the spacing between the small holes in the high-strength region α is set wider than the spacing between the small holes in the general region, as with the second perforation 22. The breaking strength of the second perforation 22 and the third perforation 23 in the general region is set to be approximately the same as the breaking strength of the general region of the first side portion 21a and the second side portion 21b of the first perforation 21.

[0028] The third perforation 23 has a third straight portion 23c (shown by a dashed line in FIG. 1 ) extending along the sixth boundary line 36 within a predetermined range from the other end 23b on the bottom surface portion 14 side. The third perforation 23 in Example 1 extends along the sixth boundary line 36 over its entire length, and the entire length is the "third straight portion 23c." The length L2 of the third straight portion 23c (the entire length of the third perforation 23 in Example 1) is set to be longer than the length L4 from the sixth boundary line 36 to the boundary line between the back surface portion 12 and the second side surface portion 16 (hereinafter referred to as the "eighth boundary line 38"). In Example 1, the length L2 is set to be approximately the same as the length in the height direction Z of the absorbent article 100.

[0029] The fourth perforation 24 is a perforation that is continuously formed from the first side surface portion 15 to the back surface portion 12 and the second side surface portion 16 and extends parallel to the top surface portion 13 and the bottom surface portion 14. One end 24a of the fourth perforation 24 is connected to the other end 22b of the second perforation 22 on the bottom surface portion 14 side, and the other end 24b is connected to the other end 23b of the third perforation 23 on the bottom surface portion 14 side. That is, the fourth perforation 24 is formed around the upper end of the absorbent article 100 located in the lower tier (see FIG. 2). In Example 1, the distance from the bottom surface portion 14 to the fourth perforation 24 formed in the first side surface portion 15, the distance from the bottom surface portion 14 to the fourth perforation 24 formed in the back surface portion 12, and the distance from the bottom surface portion 14 to the fourth perforation 24 formed in the second side surface portion 16 are all set to be the same.

[0030] Furthermore, low-strength regions β (shown by dashed double-dashed lines in FIG. 1 ) are set in the first side surface portion 15, the back surface portion 12, and the second side surface portion 16 within predetermined ranges from the fifth boundary line 35, the sixth boundary line 36, the seventh boundary line 37, and the eighth boundary line 38, respectively. The fourth perforation 24 is set so that the breaking strength in the low-strength region β is weaker than the breaking strength in the region other than the low-strength region β (hereinafter referred to as the "general region"). In other words, the breaking strength of the fourth perforation 24 at one end 24a on the second perforation 22 side, the breaking strength of the other end 24b on the third perforation 23 side, the breaking strength of a predetermined region straddling the seventh boundary line 37, and the breaking strength of a predetermined region straddling the eighth boundary line 38 are all weaker than the breaking strength of the general region. In order to set the breaking strength to a low strength, for example, as shown in FIG. 5, in the low strength region β, the size of the small hole of the fourth perforation 24 is larger than the small hole in the general region.

[0031] Furthermore, as shown in Fig. 1, the packaging bag 10 of Example 1 is a so-called top-folded gusset bag. That is, the packaging bag 10 is made by folding a synthetic resin sheet in half and folding the crease inward to form a gusset that becomes the top portion 13, and then welding both side portions that become the first side portion 15 and the second side portion 16. For this reason, the first side portion 15 and the second side portion 16 are provided with welding portions 17 that weld the synthetic resin sheet. The welding portions 17 extend along the height direction Z over the entire length of the packaging bag 10 (from the top portion 13 to the bottom portion 14). The bottom portion 14 is formed after the absorbent article 100 is stored and is sealed by welding.

[0032] The fourth perforation 24, which extends parallel to the top surface portion 13 and the bottom surface portion 14, intersects the welded portion 17, which extends along the height direction Z, in the first side surface portion 15 and the second side surface portion 16. Here, as shown in FIGS. 6( a) and 6(b), a non-welded region 18, where the synthetic resin sheet is not welded, is provided at the position where the fourth perforation 24 intersects with the welded portion 17. That is, in the welded portion 17, the synthetic resin sheet is welded intermittently and is in contact with the synthetic resin sheet without any gaps, whereas in the non-welded region 18, gaps are formed in the synthetic resin sheet. For this reason, the small holes that make up the fourth perforation 24 are formed continuously to the edge of the synthetic resin sheet, but in the non-welded region 18, the synthetic resin sheet is separated and therefore partially discontinuous.

[0033] A method for manufacturing the packaging bag 10 of the first embodiment will be described below.

[0034] As described above, the packaging bag 10 of Example 1 is formed from a flexible synthetic resin sheet such as polyethylene. The manufacturing process for producing the packaging bag 10 can be broadly divided into a first step of forming perforations 20 in the synthetic resin sheet S, a second step of folding the synthetic resin sheet S, and a third step of welding the synthetic resin sheet S, as shown in Figures 7(a) to 7(d).

[0035] 7(a), perforations 20 are formed at predetermined positions in a synthetic resin sheet S that has been pre-cut into a rectangular shape of a predetermined size. At this time, a first perforation 21, a second perforation 22, a third perforation 23, and a fourth perforation 24 of the perforations 20 are formed simultaneously. Note that in the first step, cutting the synthetic resin sheet S into a predetermined shape and forming the perforations 20 may be performed simultaneously.

[0036] In the second step shown in FIGS. 7(b) and 7(c), first, a valley fold line O1 and a pair of mountain fold lines O2, O3 are set in the synthetic resin sheet S on which the perforations 20 were formed in the first step (see FIG. 7(b)). Here, the valley fold line O1 is set in the center position in the longitudinal direction of the synthetic resin sheet S, along the short side direction. Note that the valley fold line O1 overlaps with the middle portion 21c of the first perforation 21. In addition, the pair of mountain fold lines O2, O3 are set in positions symmetrical with respect to the valley fold line O1, along the short side direction of the synthetic resin sheet S.

[0037] The synthetic resin sheet S is then valley-folded along the valley fold line O1 and mountain-folded along the mountain fold lines O2 and O3 (see FIG. 7(c)). As a result, the synthetic resin sheet S is folded in half with the longitudinal center folded inward. Note that one mountain fold line O2 becomes the boundary line (first boundary line 31) between the front portion 11 and the top surface portion 13, and the other mountain fold line O3 becomes the boundary line (second boundary line 32) between the back portion 12 and the top surface portion 13. In other words, the space between the pair of mountain fold lines O2 and O3 becomes the top surface portion 13.

[0038] 7(d), both short-side edges S1 and S2 of the synthetic resin sheet S, which has been folded in half with the longitudinal center folded inward, are welded (side-sealed), forming welded portions 17 on both short-side edges S1 and S2. As a result, the synthetic resin sheet S is formed into a gusseted bag with a top fold-in gusset and an open bottom edge S3. Furthermore, where perforations 20 overlap both short-side edges S1 and S2, the synthetic resin sheet S is not welded, leaving non-welded regions 18 where welded portions 17 are not formed (no side sealing is performed).

[0039] The operation of the packaging bag 10 of the first embodiment will be described below.

[0040] To remove the absorbent article 100 from the packaging bag 10 of Example 1, a user first tears the middle portion 21c of the first perforation 21 formed in the top surface 13 of the packaging bag 10, and then cuts the central portion of the top surface 13 along the middle portion 21c. After tearing the middle portion 21c to both ends, the user pulls one side of the slit cut along the middle portion 21c toward the front surface 11 and the other side toward the back surface 12. This tears the first side portion 21a and the second side portion 21b, respectively, and as shown in FIG. 8, the entire top surface 13 is opened and the packaging bag 10 is opened. This allows the user to easily remove the absorbent article 100 from the opened top surface 13. In other words, the packaging bag 10 of Example 1 allows the absorbent article 100 to be easily removed while maintaining its hexahedral shape, making it highly convenient.

[0041] Furthermore, in the packaging bag 10 of Example 1, the first perforation 21 is formed only on the top surface 13. Therefore, when the first perforation 21 is broken, the front surface 11 and the like are not torn and the packaging bag 10 of Example 1 can maintain its hexahedral shape. Therefore, the packaging bag 10 prevents the design on the front surface 11 and the like from becoming invisible even when the absorbent article 100 is removed, and can suppress deterioration in appearance when the absorbent article 100 is removed.

[0042] Moreover, in the packaging bag 10 of Example 1, the first perforation 21 defines a portion of the top surface 13 between itself and the first boundary line 31, and this portion of the top surface 13 (the portion from the first boundary line 31 to the middle portion 21c) is not separated from the front surface 11. Furthermore, the portion of the top surface 13 from the second boundary line 32 to the middle portion 21c is not separated from the back surface 12. Therefore, the user can cover the exposed absorbent article 100 by folding the separated top surface 13 toward the inside of the packaging bag 10 so that the middle portions 21c butt against each other. This hides the absorbent article 100, and the packaging bag 10 can prevent dust from adhering to the absorbent article 100.

[0043] Then, the user removes all of the absorbent articles 100 located in the upper tier of the two-tiered stack of absorbent articles 100, and then pulls a portion of the top surface portion 13 (the portion from the first boundary line 31 to the middle portion 21c) downward. As a result, as shown in Fig. 9, the second perforation 22 and the third perforation 23 are broken, and a portion of the front surface portion 11 is opened.

[0044] Next, the user tears the fourth perforation 24. As a result, as shown in Fig. 10, the first side surface portion 15, the back surface portion 12, and the second side surface portion 16 are divided into upper and lower portions, and the portion surrounding the absorbent article 100 located in the upper tier is cut off. As a result, the packaging bag 10 is reduced in size to fit the absorbent article 100 located in the lower tier.

[0045] On the other hand, the second perforation 22 and the third perforation 23 extend from the first perforation 21 toward the bottom surface 14 to a position midway in the height direction Z of the front surface portion 11. Therefore, the front surface portion 11 is only separated to a position midway in the height direction Z. In other words, as shown in FIG. 10 , the packaging bag 10 maintains its hexahedral shape for storing the absorbent articles 100 located at the bottom, preventing the shape from collapsing and maintaining the design of the exterior. Moreover, as shown in FIG. 11 , the user can fold the front surface portion 11 back and place it over the absorbent articles 100, thereby covering the absorbent articles 100 with the front surface portion 11. This allows the packaging bag 10 to hide the absorbent articles 100 while maintaining its hexahedral shape, preventing deterioration of the appearance and preventing dust from adhering to the absorbent articles 100.

[0046] In this way, when using the absorbent articles 100 located on the upper tier, the packaging bag 10 of Example 1 can open only the top surface portion 13 while maintaining its hexahedral shape. After using the absorbent articles 100 located on the upper tier, the upper parts of the first side surface portion 15, the back surface portion 12, and the second side surface portion 16 can be separated while leaving the front surface portion 11. This allows the packaging bag 10 of Example 1 to be reduced in size and still maintain the hexahedral shape of the portion that stores the absorbent articles 100 located on the lower tier. Moreover, the packaging bag 10 can cover the stored absorbent articles 100 with part of the top surface portion 13 or the front surface portion 11, preventing the absorbent articles 100 from being exposed and dust from adhering to them. As a result, the packaging bag 10 of Example 1 can suppress deterioration in appearance due to removal of the absorbent articles 100 (stored items) and can be highly convenient.

[0047] Furthermore, in the packaging bag 10 of Example 1, the first perforation 21 has a first side portion 21a extending along the third boundary line 33, a second side portion 21b extending along the fourth boundary line 34, and an intermediate portion 21c connecting between the first side portion 21a and the second side portion 21b. This allows the user to open the central region of the top surface portion 13, and easily remove the stored absorbent article 100.

[0048] Moreover, in the packaging bag 10 of Example 1, the first side portion 21a and the second side portion 21b extend from the first boundary line 31 to the second boundary line 32. Therefore, as shown in Fig. 8, the user can open the entire top surface portion 13 in a so-called double-door state, making it even easier to take out the absorbent article 100. This allows the packaging bag 10 of Example 1 to further improve convenience.

[0049] Furthermore, in the packaging bag 10 of Example 1, the first side portion 21a and the second side portion 21b are set to have a breaking strength that is stronger than the breaking strength of the general region in the high-strength region α that is set within a predetermined range from the first boundary line 31. That is, the first side portion 21a and the second side portion 21b need to be broken with a relatively strong force in the high-strength region α. This prevents the second perforation 22 and the third perforation 23 formed in the front portion 11 from being broken by the force of breaking the general region of the first side portion 21a or the second side portion 21b. Therefore, when the top surface portion 13 is opened, the packaging bag 10 of Example 1 is able to prevent the second perforation 22 and the third perforation 23 from being broken, and maintain the shape of the packaging bag 10.

[0050] Furthermore, in the packaging bag 10 of Example 1, the second perforation 22 and the third perforation 23 are set to have a breaking strength that is stronger than the breaking strength of the general region in the high-strength region α that is set within a predetermined range from the first boundary line 31. That is, the second perforation 22 and the third perforation 23 need to be broken with a relatively strong force in the high-strength region α. Therefore, when the absorbent article 100 is removed from the opened top surface 13, the second perforation 22 and the third perforation 23 formed in the front surface 11 can be prevented from breaking, and the shape of the packaging bag 10 can be maintained.

[0051] In addition, in the packaging bag 10 of Example 1, the second perforation 22 has a second straight portion 22c that extends along the fifth boundary line 35 within a predetermined range from the other end 22b on the bottom surface 14 side (a range spanning the entire length of the second perforation 22 in Example 1). The length L1 of the second straight portion 22c is set to be longer than the length L3 from the fifth boundary line 35 to the seventh boundary line 37. In addition, in the packaging bag 10 of Example 1, the third perforation 23 has a third straight portion 23c that extends along the sixth boundary line 36 within a predetermined range from the other end 23b on the bottom surface 14 side (a range spanning the entire length of the third perforation 23 in Example 1). The length L2 of the third straight portion 23c is set to be longer than the length L4 from the sixth boundary line 36 to the eighth boundary line 38.

[0052] 11, when all the perforations 20 are broken and the front portion 11 is folded back, the entire opening of the packaging bag 10 can be covered by the front portion 11. This allows the front portion 11 to be used as a lid to cover the absorbent article 100 located below.

[0053] Furthermore, in the packaging bag 10 of Example 1, a low-strength region β is set in the first side portion 15, the back portion 12, and the second side portion 16, and the fourth perforation 24 is set so that the breaking strength in the low-strength region β is weaker than the breaking strength in the general region other than the low-strength region β. That is, the breaking strength of one end 24a on the second perforation 22 side, the breaking strength of the other end 24b on the third perforation 23 side, the breaking strength of the predetermined region straddling the seventh boundary line 37, and the breaking strength of the predetermined region straddling the eighth boundary line 38 are all weaker than the breaking strength of the general region.

[0054] Here, the portion where the low-strength region β is set is the portion that breaks first or the portion where the breaking direction changes when a user tears fourth perforation 24. By setting the breaking strength of fourth perforation 24 to be weak in such low-strength region β, a user can easily tear fourth perforation 24 along its entire length.

[0055] Furthermore, in the packaging bag 10 of Example 1, a non-welded area 18 where the synthetic resin sheet is not welded is provided at the position where the fourth perforation 24 intersects with the welded portion 17. This prevents the packaging bag 10 from crushing the small hole of the fourth perforation 24 due to welding the synthetic resin sheet. Therefore, the fourth perforation 24 does not become non-functional, and can be reliably torn.

[0056] The packaging bag 10 of the present invention has been described above based on Example 1, but the specific configuration is not limited to Example 1, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim.

[0057] In the packaging bag 10 of Example 1, an example is shown in which the second straight portion 22c and the third straight portion 23c are set in a range that spans the entire length of the second perforation 22 and the third perforation 23. However, as long as the relationships L1>L3 and L2>L4 are ensured, the second perforation 22 and the third perforation 23 may be set, for example, as in the packaging bag 10A of the first modified example shown in Fig. 12 .

[0058] That is, the second perforation 22 may extend from a position near the fifth boundary line 35 toward the center of the width direction Y of the front portion 11 between the upper end of the second straight portion 22c and the first boundary line 31. Furthermore, the third perforation 23 may extend from a position near the sixth boundary line 36 toward the center of the width direction Y of the front portion 11 between the upper end of the third straight portion 23c and the first boundary line 31. As a result, when the second perforation 22 and the third perforation 23 are torn, the length of the front portion 11 in the width direction Y is shortened near the top surface portion 13 (the upper part of the front portion 11).

[0059] At this time, in the first perforation 21, the first side portion 21a extends from a position near the third boundary line 33 toward the center of the width direction Y of the front portion 11 between a midpoint in the depth direction X and the first boundary line 31. Additionally, the second side portion 21b extends from a position near the fourth boundary line 34 toward the center of the width direction Y of the front portion 11 between a midpoint in the depth direction X and the first boundary line 31.

[0060] Therefore, when only the first perforation 21 is broken, it is possible to leave a corner K1 formed by the front surface portion 11, the top surface portion 13, and the first side surface portion 15, and a corner K2 formed by the front surface portion 11, the top surface portion 13, and the second side surface portion 16. This makes it possible to further prevent the hexahedral shape of the packaging bag 10 from collapsing when the first perforation 21 is broken.

[0061] Furthermore, in the packaging bag 10 of Example 1, the distance from the bottom surface portion 14 to the fourth perforation 24 formed in the first side surface portion 15 and the second side surface portion 16 is set to the same distance as the distance from the bottom surface portion 14 to the fourth perforation 24 formed in the back surface portion 12. However, the shape of the fourth perforation 24 is not limited to this. For example, the fourth perforation 24 may be set as in a packaging bag 10B of a second modified example shown in FIG. 13.

[0062] That is, the fourth perforation 24 is divided into a first perforation 24c, a second perforation 24d, a third perforation 24e, a fourth perforation 24f, and a fifth perforation 24g. Here, the first perforation 24c is a portion of the fourth perforation 24 that is formed on the first side surface 15 and extends parallel to the top surface 13 and the bottom surface 14. One end of the first perforation 24c (one end 24a of the fourth perforation 24) is connected to a midpoint of the second perforation 22 in the height direction Z. Furthermore, the second perforation 24d is a portion of the fourth perforation 24 that is formed on the second side surface 16 and extends parallel to the top surface 13 and the bottom surface 14. One end of the second perforation 24d (the other end 24b of the fourth perforation 24) is connected to a midpoint of the third perforation 23 in the height direction Z. The third perforation 24e is a portion of the fourth perforation 24 that is formed on the back surface 12 and extends parallel to the top surface 13 and the bottom surface 14. The fourth perforation 24f is a portion of the fourth perforation 24 that is formed on the back surface 12 and extends along the seventh boundary line 37. One end of the fourth perforation 24f is connected to the first perforation 24c and the other end is connected to the third perforation 24e. The fifth perforation 24g is a portion of the fourth perforation 24 that is formed on the back surface 12 and extends along the eighth boundary line 38. One end of the fifth perforation 24g is connected to the second perforation 24d and the other end is connected to the third perforation 24e.

[0063] The distance H1 from the bottom surface 14 to the first perforation 24c and the distance H2 from the bottom surface 14 to the second perforation 24d are set to be longer than the distance H3 from the bottom surface 14 to the third perforation 24e.

[0064] As a result, in the packaging bag 10B of the second modified example, when the fourth perforation 24 is broken, a larger area of the first side surface portion 15 and the second side surface portion 16 is not cut away compared to Example 1. Therefore, as shown in Fig. 14, the first side surface portion 15 and the second side surface portion 16 can be folded back toward the inside of the packaging bag 10, and parts of the first side surface portion 15 and the second side surface portion 16 can be used as flaps to cover the absorbent article 100. As a result, compared to Example 1, it is even more difficult for dust and the like to adhere to the absorbent article 100, allowing for more hygienic storage.

[0065] Furthermore, in the packaging bag 10 of Example 1, an example was shown in which the first perforation 21 has a first side portion 21a, a second side portion 21b, and a middle portion 21c, and is H-shaped in a plan view (see FIG. 3). However, the shape of the first perforation 21 is not limited to this. The first perforation 21 may be a perforation formed in the top surface portion 13 and partitioning a portion of the top surface portion 13 between the front surface portion 11 and the boundary line (first boundary line 31) of the top surface portion 13. Therefore, for example, the first perforation 21α of a first modified example shown in FIG. 15 may be a perforation formed in the top surface portion 13, extending in an arc shape in a plan view, with both ends connected to the first boundary line 31.

[0066] Furthermore, in the packaging bag 10 of Example 1, the breaking strength of the first side portion 21a and the second side portion 21b in the high-strength region α is set to be stronger than the breaking strength of the general region, and the breaking strength of the fourth perforation 24 in the low-strength region β is set to be weaker than the breaking strength of the general region. In other words, the example shows an example in which the breaking strength of the perforation 20 is partially changed. However, the breaking strength of the perforation 20 may be constant throughout the entire region. In other words, the breaking strength of the perforation 20 can be set as desired.

[0067] Furthermore, the packaging bag 10 of Example 1 has been shown as an example in which a plurality of absorbent articles 100 are stored lined up in an upright state along the width direction Y and stacked in two layers along the height direction Z. However, the absorbent articles 100 may be stored lined up in only one layer along the height direction Z, or may be stored stacked in three or more layers. Note that, in cases where the absorbent articles 100 are stored stacked in three or more layers, two or more fourth perforations 24 may be formed, as in a packaging bag 10C of a third modified example shown in Fig. 15 .

[0068] In the packaging bag 10 of Example 1, an example has been shown in which the second perforation 22 and the third perforation 23 are both formed in the front portion 11. However, the positions at which the second perforation 22 and the third perforation 23 are formed are not limited to this. That is, for example, the second perforation 22 may be formed along the boundary line (fifth boundary line 35) between the front portion 11 and the first side portion 15, or may be formed in the first side portion 15 at a position near the fifth boundary line 35. Furthermore, the third perforation 23 may be formed along the boundary line (sixth boundary line 36) between the front portion 11 and the second side portion 16, or may be formed in the second side portion 16 at a position near the sixth boundary line 36. That is, the second perforation 22 may be formed in either the front portion 11 or the first side portion 15, as long as it is near the fifth boundary line 35. Furthermore, the third perforation 23 may be formed in either the front surface portion 11 or the second side surface portion 16, as long as it is located in the vicinity of the sixth boundary line .

[0069] Moreover, the packaging bag 10 of Example 1 is exemplified as storing absorbent articles 100 such as disposable paper diapers, absorbent pads for light incontinence, sanitary products, etc. However, the articles stored in the packaging bag 10 are not limited to absorbent articles 100, and any articles can be stored. [Explanation of symbols]

[0070] 10 packaging bags 11 Front 12 Back section 13 Top section 14 Bottom part 15 First side part 16 Second side part 17 Welded area 18 Non-welded area 20 perforations 21 First perforation 21a First side 21b Second side 21c middle part 22 Second perforation 22a One end 22b the other end on the bottom side 22c 2nd straight section 23 Third perforation 23a One end 23b the other end on the bottom side 23c 3rd straight section 24 4th perforation 24c First Sewing Machine Section 24d Second Sewing Machine Section 24e Third Sewing Machine Section 31 First boundary line (boundary line between the front and top surfaces) 32 Second boundary line (boundary line between the back and top) 33 Third boundary line (boundary line between top surface and first side surface) 34 Fourth boundary line (boundary line between top surface and second side surface) 35 5th boundary line (boundary line between the front and first side sections) 36 6th boundary line (boundary line between the front and second side sections) 37 7th boundary line (boundary line between the back and the first side) 38 8th boundary line (boundary line between back and second side)

Claims

1. A packaging bag having a hexahedral shape consisting of a front portion and a back portion facing each other, a top portion and a bottom portion facing each other, and a first side portion and a second side portion facing each other, which contains a predetermined item and is opened by tearing a perforation provided on the periphery, The perforations are formed on the top surface portion, and a first perforation that partitions a part of the top surface portion between the front portion and the boundary line of the top surface portion; A second perforation having one end connected to the first perforation and extending toward the bottom surface portion to a midpoint in the height direction of the front surface portion; a third perforation having one end connected to the first perforation and extending toward the bottom surface portion to a midpoint in the height direction of the front surface portion; a fourth perforation that is formed continuously from the first side surface portion through the back surface portion to the second side surface portion, and has one end connected to the second perforation and the other end connected to the third perforation; Equipped with The first perforation has a first side portion extending along the boundary line between the top surface portion and the first side surface portion, a second side portion extending along the boundary line between the top surface portion and the second side surface portion, and an intermediate portion having one end connected to the first side portion and the other end connected to the second side portion. A packaging bag characterized by:

2. In the packaging bag described in claim 1, The first side portion and the second side portion each extend from a boundary line between the front portion and the top surface portion to a boundary line between the back portion and the top surface portion. A packaging bag characterized by:

3. The packaging bag according to claim 1 or 2, The second perforation has a second linear portion extending along a boundary line between the front portion and the first side portion within a predetermined range from an end portion on the bottom surface portion side, The third perforation has a third linear portion extending along a boundary line between the front portion and the second side portion within a predetermined range from the end portion on the bottom surface portion side, a length of the second linear portion is set to be longer than a length from a boundary line between the front portion and the first side surface portion to a boundary line between the back portion and the first side surface portion, The length of the third linear portion is set to be longer than the length from the boundary line between the front portion and the second side portion to the boundary line between the back portion and the second side portion. A packaging bag characterized by:

4. The packaging bag according to any one of claims 1 to 3, The first perforation is set so that the breaking strength in a predetermined region from the boundary line between the front surface portion and the top surface portion is stronger than the breaking strength in other regions. A packaging bag characterized by:

5. The packaging bag according to any one of claims 1 to 4, The second perforation and the third perforation are set so that the breaking strength in a predetermined region from the boundary line between the front surface portion and the top surface portion is stronger than the breaking strength in other regions. A packaging bag characterized by:

6. The packaging bag according to any one of claims 1 to 5, The fourth perforation has a breaking strength set to be weaker than the breaking strengths of the other regions at an end portion on the second perforation side, an end portion on the third perforation side, a predetermined region straddling the boundary line between the back portion and the first side portion, and a predetermined region straddling the boundary line between the back portion and the second side portion. A packaging bag characterized by:

7. The packaging bag according to any one of claims 1 to 6, The fourth perforation has a first perforation formed on the first side surface portion and extending parallel to the top surface portion and the bottom surface portion, a second perforation formed on the second side surface portion and extending parallel to the top surface portion and the bottom surface portion, and a third perforation formed on the back surface portion and extending parallel to the top surface portion and the bottom surface portion, The distance from the bottom surface portion to the first perforation portion and the distance from the bottom surface portion to the second perforation portion are set to be longer than the distance from the bottom surface portion to the third perforation portion. A packaging bag characterized by:

8. The packaging bag according to any one of claims 1 to 7, The hexahedron shape is formed by welding synthetic resin sheets together at welding portions, A non-welded area where the synthetic resin sheet is not welded is provided at the position where the perforation and the welded portion intersect. A packaging bag characterized by:

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