Packaging body

Abstract

Provided is a package that can be easily opened while having durability during conveyance. A package (1) includes a plurality of absorbent articles (2) and a package bag (3) that houses the plurality of absorbent articles (2) and includes an upper-and-lower direction (T) and has an upper surface portion (10), a front surface portion (11), a rear surface portion (12), a right surface portion (13), and a left surface portion (14). The package bag (3) has a first weakening line (21) with a tearing strength of 4 N or less in an opening predetermined region (7) between an outer edge of a gripping predetermined region (6) of the upper surface portion (10) and an end edge on an upper side of the plurality of absorbent articles (2) in the upper-and-lower direction (T). A tensile strength of the first weakening line with respect to a pulling force in the upper-and-lower direction is 3.5 N / 25 mm / kg or more.

Description

TECHNICAL FIELD

[0001] The present application relates to a package of absorbent articles. BACKGROUND

[0002] A package in which a plurality of absorbent articles such as urine-absorbing pads are housed in a packaging bag is known. The packaging bag is provided with a weakening line such as a tear line on the outer surface. A user tears the packaging bag from the weakening line as a starting point, and takes out the absorbent articles inside the packaging bag.

[0003] For example, a package in which paper diapers or the like are housed in a packaging bag is disclosed in Patent Document 1. The packaging bag is provided with a seal line in which both sides of a cylindrical plastic sheet are folded and sealed in a folded state. A handle portion is provided at the seal line. In this packaging bag, a breaking line (weakening line) that is substantially parallel to the bottom surface of the packaging bag is attached to a region that is below the seal line of the upper opening portion and reaches the upper surface of the filled-in housed article or the vicinity thereof. For example, there are cases where the breaking line is continuously provided throughout the entire circumference of the packaging bag; the breaking line is independently provided at the same height at the corner portions of the packaging bag and the breaking line is further provided at a position slightly lower than the above-mentioned breaking line at the front surface portion, both side surface portions, and the back surface portion, respectively. In the following description, the breaking line of Patent Document 1 is also referred to as a weakening line.

[0004] Prior art documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2001-301859 SUMMARY

[0007] Problem to be solved by the invention

[0008] The packaging bag is torn from the weakening line as a starting point at the time of opening, and thus it is preferable in terms of improving the opening property that the portion in which the weakening line is formed can be easily torn.

[0009] On the other hand, the package needs to have durability in which the absorbent articles inside can be maintained at the time of carrying. The weakening line of the packaging bag of the above-mentioned Patent Document 1 is located on the line of action of the force generated by the absorbent articles housed in the packaging bag on the handle portion. Therefore, at the time of carrying, that is, at the time when the package is lifted while holding the handle portion, the force acting on the handle portion also acts on the portion in which the weakening line is formed. In the case where the force acting on the handle portion exceeds the strength of the portion in which the weakening line is formed, there is a problem that the packaging bag is unexpectedly torn from the weakening line as a starting point, and thus it is difficult to carry the absorbent articles.

[0010] An object of the present application is to provide a package in which the opening can be easily performed while having durability at the time of carrying.

[0011] Solution to solve the problem

[0012] The packaging body according to one aspect of the present application is described below.

[0013] A packaging body including a plurality of absorbent articles, and a packaging bag that houses the plurality of absorbent articles, includes an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion in an up-down direction, wherein the packaging bag has a first weakening line having a tear strength of 4 N or less in an opening predetermined region between an outer edge of a holding predetermined region of the upper surface portion and an end edge of an upper side of the plurality of absorbent articles in the up-down direction, and a tensile strength of the first weakening line with respect to a pulling force in the up-down direction is 3.5 N / 25 mm / kg or more.

[0014] Effects of the invention

[0015] According to the present application, a packaging body that can be easily opened while having durability during conveyance can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view schematically showing a structure example of the packaging body of the embodiment.

[0017] Figure 2 is a front view and a right view schematically showing a structure example of the packaging body of the embodiment.

[0018] Figure 3 is a plan view schematically showing the packaging bag of the packaging body of the embodiment.

[0019] Figure 4 is a diagram for explaining the embodiment, and is a schematic view showing a sample of a tear test.

[0020] Figure 5 is a diagram for explaining the embodiment, and is a schematic view showing a tensile tester.

[0021] Figure 6 is a diagram for explaining the embodiment, and is a schematic view showing a tensile tester.

[0022] Figure 7 is a schematic view showing a structure example of the first weakening line and a structure example of the second weakening line of the packaging body of the embodiment.

[0023] Figure 8 is a schematic view showing an example of a manufacturing method of the packaging body of the embodiment.

[0024] Figure 9 is a schematic view showing a state in which the packaging body of the embodiment is completely or partially opened.

[0025] Figure 10 is a front view schematically showing a structure example of a package of a modification of the embodiment.

[0026] Figure 11 is a diagram for explaining the embodiment, and is a schematic view showing a falling test machine. DETAILED DESCRIPTION

[0027] The present embodiment relates to the following aspect.

[0028] [Aspect 1]

[0029] A package including a plurality of absorbent articles, and a packaging bag that houses the plurality of absorbent articles, includes an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion in an up-down direction, wherein the packaging bag has a first weakening line having a tear strength of 4 N or less in an opening-predestined region between an outer edge of a holding-predestined region of the upper surface portion and an end edge of an upper side of the plurality of absorbent articles in the up-down direction, and a tensile strength of the first weakening line with respect to a pulling force in the up-down direction is 3.5 N / 25 mm / kg or more.

[0030] The package has the first weakening line having a tear strength of 4 N or less in the opening-predestined region between the outer edge of the holding-predestined region and the end edge of the upper side of the plurality of absorbent articles in the up-down direction. By the first weakening line having a tear strength of 4 N or less, tearing can be easily performed, and thus can serve as a starting point when opening. Therefore, the package can be easily opened.

[0031] Since the first weakening line is provided in the opening-predestined region between the outer edge of the holding-predestined region and the end edge of the upper side of the plurality of absorbent articles in the up-down direction, the first weakening line is located on an action line of a force generated by the absorbent articles housed in the packaging bag to the portion of the packaging bag located in the holding-predestined region when the portion of the packaging bag located in the holding-predestined region is held. Thus, in the case of carrying, that is, in the case of lifting the package while holding the portion of the packaging bag located in the holding-predestined region, the force acting on the portion of the packaging bag located in the holding-predestined region also acts on the first weakening line. The tensile strength A of the first weakening line with respect to the pulling force in the up-down direction and the total weight B of the plurality of absorbent articles have a relationship of A / B ≥ 3.5 (N / 25 mm / kg), and thus it is possible to prevent the first weakening line from being torn as a starting point due to the force acting on the packaging bag at the time of carrying. Therefore, it can be said that the package has durability at the time of carrying.

[0032] As described above, the package can be easily opened while having durability at the time of carrying.

[0033] [Scheme 2]

[0034] For the packaging body described in Scheme 1, in which the end region in the direction intersecting the up-down direction within the opening predetemined region has the first weakening line, and the central region in the direction intersecting the up-down direction within the opening predetemined region has the second weakening line, the first weakening line and the second weakening line each include a plurality of perforations formed at intervals in the column direction, and at least one of the length in the column direction of the plurality of perforations and the length in the column direction of the intervals is different for the first weakening line and the second weakening line.

[0035] The force acting on the packaging bag within the opening predetemined region differs depending on the position within the opening predetemined region, and also differs depending on the position actually gripped within the gripping predetemined region. Depending on the position within the opening predetemined region, at least one of the length in the column direction of the plurality of perforations of the first weakening line and the second weakening line and the length in the column direction of the intervals is appropriately changed, whereby the durability during handling and the ease of opening of the packaging body can be more reliably adjusted.

[0036] [Scheme 3]

[0037] For the packaging body described in Scheme 2, in which the length in the column direction of the plurality of perforations of the first weakening line is below the length in the column direction of the intervals of the first weakening line.

[0038] In the first weakening line, the length in the column direction of the perforations is below the length in the column direction of the intervals, that is, the intervals of the adjacent perforations from each other, whereby deformation of the perforations caused by the pulling force in the up-down direction can be suppressed. Thus, it is possible to prevent the case where the adjacent perforations are linked due to deformation of the perforations during handling, that is, the case where the packaging bag is torn starting from the first weakening line. Thus, for the packaging body, it is possible to prevent the case where the packaging bag is torn during handling.

[0039] [Scheme 4]

[0040] For the packaging body described in Scheme 2 or 3, in which, in the opening predetemined region, the adjacent first weakening line and second weakening line are separated from each other.

[0041] By separating the adjacent first weakening line and second weakening line from each other, the force acting when gripping the portion of the packaging bag located in the gripping predetemined region is dispersed to the first weakening line and the second weakening line, respectively. Thus, it is possible to suppress the case where the adjacent first weakening line and second weakening line affect each other, that is, the case where the first weakening line and the second weakening line are torn in a linked manner. Thus, for the packaging body, it is possible to prevent the case where the packaging bag is torn during handling.

[0042] [Scheme 5]

[0043] For the packaging body described in any one of solutions 2 to 4, in which the packaging bag has a corner portion in the opening-destined region, the corner portion being a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, a portion where the rear surface portion and the right surface portion intersect, and a portion where the rear surface portion and the left surface portion intersect, respectively, the first weakened line is provided so as to cross the top of at least one of the corner portions, and the distance from the top of the corner portion provided with the first weakened line to the end of the first weakened line is shorter than the length in the column direction of the interval.

[0044] In the packaging body, since the first weakened line is provided so as to cross the top of at least one of the corner portions, the packaging bag can be easily torn from the first weakened line as a starting point by pinching the corner portion with fingers. Further, in the corner portion, since the distance from the top to the end of the first weakened line is shorter than the length in the column direction of the interval, i.e., the interval between the adjacent perforations, the packaging bag can be more easily torn from the first weakened line as a starting point.

[0045] [Solution 6]

[0046] For the packaging body described in any one of solutions 2 to 5, in which the packaging bag has a corner portion in the opening-destined region, the corner portion being a portion where the front surface portion and the right surface portion intersect, a portion where the front surface portion and the left surface portion intersect, a portion where the rear surface portion and the right surface portion intersect, and a portion where the rear surface portion and the left surface portion intersect, respectively, the corner portion being formed by folding the right surface portion and the left surface portion toward the inner side valley of the packaging bag in a direction intersecting the up-down direction between the front surface portion and the rear surface portion, the first weakened line is provided so as to cross the top of at least one of the corner portions, the second weakened line is provided in the front surface portion and the rear surface portion, the length in the column direction of the perforations of the first weakened line is longer than the length in the column direction of the perforations of the second weakened line, or the ratio of the length in the column direction of the perforations of the first weakened line with respect to the length in the column direction of the interval of the first weakened line is larger than the ratio of the length in the column direction of the perforations of the second weakened line with respect to the length in the column direction of the interval of the second weakened line.

[0047] Since the corner portion is formed by folding the right surface portion and the left surface portion so as to be folded at an inner valley in a direction intersecting the up-down direction between the front surface portion and the front surface portion, respectively, the corner portion can be more easily pinched with fingers. Therefore, by pinching the corner portion with fingers to tear the packaging bag from the first weakened line as a starting point, opening can be more easily performed. Further, the second weakened line is provided in a larger range of the front surface portion and the rear surface portion, the length in the row direction of the holes of the first weakened line is longer than the length in the row direction of the holes of the second weakened line, or the ratio of the length in the row direction of the holes of the first weakened line with respect to the length in the row direction of the interval of the first weakened line is larger than the ratio of the length in the row direction of the holes of the second weakened line with respect to the length in the row direction of the interval of the second weakened line, so that tearing of the second weakened line at the time of carrying can be prevented.

[0048] [Scheme 7]

[0049] For the packaging body described in Scheme 5 or 6, wherein, in the corner portion provided with the first weakened line, the first weakened line overlaps in the up-down direction across both sides of the top portion.

[0050] In the corner portion provided with the first weakened line, the first weakened line overlaps in the up-down direction across both sides of the top portion. When the packaging body is torn by pinching the corner portion with fingers, the force is not dispersed, so that the packaging bag can be more easily torn, and as a result, opening can be easily performed.

[0051] [Scheme 8]

[0052] For the packaging body described in any one of Schemes 2 to 7, wherein the first weakened line is formed at a position lower than the center in the up-down direction within the opening predetermined area.

[0053] Since the first weakened line is formed at a position lower than the center in the up-down direction within the opening predetermined area, the force acting on the first weakened line from the portion of the packaging bag located in the holding predetermined area is dispersed by the portion of the packaging bag located in the opening predetermined area. Therefore, the force acting on the first weakened line is reduced, so that tearing of the first weakened line at the time of carrying can be prevented.

[0054] [Scheme 9]

[0055] For the packaging body described in any one of Schemes 2 to 7, wherein the first weakened line is formed at a position higher than the center in the up-down direction within the opening predetermined area.

[0056] Since the first weakened line is formed at a position higher than the center in the upward and downward direction within the opening intended region, the first weakened line does not overlap with the position of the absorbent article housed in the packaging bag. Therefore, even in a state where the packaging body is swollen by the absorbent article, the packaging bag can be easily opened by pinching the portion of the packaging bag within the opening intended region with fingers to tear the packaging bag from the first weakened line as a starting point.

[0057] [Embodiment 10]

[0058] The packaging body described in any one of Embodiments 2 to 9, wherein the tensile strength of the first weakened line and the second weakened line with respect to the pulling force in the upward and downward direction is smaller than the puncture strength of the packaging bag.

[0059] Since the tensile strength of the first weakened line and the second weakened line with respect to the pulling force in the upward and downward direction is smaller than the puncture strength of the packaging bag, the first weakened line and the second weakened line are preferentially torn by the finger being pressed before the finger hole is formed in the surface of the packaging body at the time of opening. Therefore, for the packaging body, the packaging bag can be appropriately torn along the first weakened line and the second weakened line, and thus the opening can be more easily performed.

[0060] [Embodiment 11]

[0061] The packaging body described in any one of Embodiments 2 to 10, wherein the packaging bag is formed of a film having a thickness of 40 μm or more and 80 μm or less.

[0062] By forming the packaging bag of a film having a thickness of 40 μm or more and 80 μm or less, a predetermined strength is obtained. Thus, for the packaging body, the case where the surface of the packaging body is accidentally torn by the finger being pressed can be more reliably prevented. Therefore, the durability at the time of carrying can be further improved for the packaging body.

[0063] [Embodiment 12]

[0064] The packaging body described in any one of Embodiments 2 to 11, wherein the total weight of the plurality of absorbent articles is 800 g or more and 3500 g or less.

[0065] By providing the packaging bag with the durability at the time of carrying, the packaging body can be produced in which the total weight of the plurality of absorbent articles is 800 g or more and 3500 g or less.

[0066] [Embodiment 13]

[0067] The packaging body described in any one of Embodiments 2 to 12, wherein the plurality of absorbent articles are folded in half, and the fold is disposed on the upper side in the upward and downward direction.

[0068] Generally, the absorbent article has a longitudinal direction, and an absorbent body is included in the substantially center in the longitudinal direction. The absorbent body includes water-absorbent fibers and high-absorbency polymer particles, and has a higher density. Therefore, in a case where the absorbent article is folded in half in the center in the longitudinal direction, the center of gravity is positioned close to the fold. Therefore, by folding the absorbent article in half, and positioning the fold on the upper side in the up-down direction inside the packaging bag, the position of the center of gravity of the packaging body becomes a position on the upper side in the up-down direction. Thus, the moment of inertia of the packaging body with the above surface portion as the center of rotation is reduced by the amount of the position of the center of gravity being on the upper side. Therefore, it is possible to suppress the force acting on the first weakening line in a case where the packaging body is swung during transportation, and in a case where the packaging body collides against an obstacle or the like, it is possible to further reduce the impact applied to the first weakening line. Therefore, it is possible to prevent the first weakening line from being torn in a case of transportation for the packaging body.

[0069] [Embodiment 14]

[0070] For the packaging body described in any one of Embodiments 2 to 13, wherein the packaging bag has a handle portion in the gripping predetermined region.

[0071] By the packaging bag having a handle portion in the gripping predetermined region, the position of gripping is determined, and thus the force acting on the first weakening line is stabilized. That is, it is possible to prevent a case where an excessively large force is accidentally applied to the first weakening line. Therefore, it is possible to prevent the first weakening line from being torn in a case of transportation for the packaging body.

[0072] [Embodiment 15]

[0073] For the packaging body described in Embodiment 14, wherein the packaging bag has a high-rigidity portion, the high-rigidity portion is formed by embossing, the position of the high-rigidity portion in the up-down direction is between the handle portion and the first weakening line, and the high-rigidity portion extends over the entire region of the upper surface portion in a direction intersecting the up-down direction.

[0074] Since the packaging bag has a high-rigidity portion, the force acting on the handle portion is dispersed by the high-rigidity portion to the entire region of the upper surface portion in a direction intersecting the up-down direction. That is, the force acting on the handle portion is absorbed by a larger range of the upper surface portion, and thus it is possible to reduce the force acting on the first weakening line, and thus it is possible to prevent a case where the first weakening line is torn in a case of transportation.

[0075] [Embodiment 16]

[0076] For the packaging body described in Scheme 14 or 15, the packaging bag further has a joint portion formed by joining the upper ends of the front surface portion and the rear surface portion, and the joint portion is provided with the handle portion, the handle portion having an opening formed by cutting the joint portion along the thickness direction, the opening having a curved handle portion.

[0077] Because the opening of the handle is curved, stress concentration at the handle due to the weight of multiple absorbent items stored in the packaging bag is avoided. This prevents the handle from tearing or breaking at the point of stress concentration. Therefore, even when using lower-strength sheet materials to form the packaging bag for improved openability, the handle's durability can be maintained. Consequently, the packaging body possesses durability during handling.

[0078] [Option 17]

[0079] For the packaging body described in any of Schemes 14 to 16, the handle portion is provided with a reinforcing membrane.

[0080] By incorporating a reinforcing membrane into the handle, strength is increased. Therefore, even when using lower-strength sheet materials to form the packaging bag for improved openability, the handle's durability can be maintained. Consequently, the packaging achieves durability during handling.

[0081] The packaging body of the embodiment will be described below. In this specification, the term "along a certain direction" includes directions within a range of ±30° relative to that direction. Furthermore, the term "end point in a certain direction of a certain member, etc." refers to a length of 1 / 5 (preferably 1 / 10) or less of the overall length of the member, etc., in that direction, extending from the end edge of that member's end point.

[0082] like Figure 1 and Figure 2 As shown, the packaging body 1 comprises multiple absorbent articles 2 and a packaging bag 3 for storing the multiple absorbent articles 2. The absorbent articles 2 are, for example, disposable diapers such as underwear-type diapers and belt-type diapers. Although not shown, they include a liquid-permeable top sheet, a liquid-impermeable bottom sheet, and an absorbent core disposed between the top sheet and the bottom sheet. The absorbent article 2 has a length direction, which is divided into three regions: a front waist region, a back waist region, and a crotch region between the front waist region and the back waist region. The absorbent core is disposed throughout these three regions. Furthermore, the above content is well known in the art, and therefore, further description is omitted.

[0083] The method of storing the plurality of absorbent articles 2 in the packaging bag 3 is not particularly limited and is arbitrary. The absorbent articles 2 can be folded in half at the substantially center in the length direction. Alternatively, the absorbent articles 2 can be stored in the packaging bag 3 in a state where the plurality of absorbent articles 2 are arranged in a column in the width direction W while being stacked in three layers in the up-down direction T with the folds 5 being on the upper side in the up-down direction T. In the case of the present embodiment, the absorbent articles 2 are arranged in the packaging bag 3 in a state where the folds 5 are on the upper side in the up-down direction T and 13 are stacked in the width direction W and three are stacked in the up-down direction T. The size of the absorbent articles 2 is not particularly limited, but for example, 5 cm to 30 cm x 5 cm to 40 cm x 1 cm to 10 cm in the unfolded state can be given.

[0084] The kind of the absorbent article is not limited to the example, and other absorbent articles can also be used as long as the gist of the present application is not deviated. As the other absorbent articles, an absorbent pad, a sanitary napkin, an incontinence pad, and the like can be given.

[0085] The packaging bag 3 is composed of a sheet member formed of a synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate. The sheet member can use, for example, a film having a thickness of 40 μm or more and 80 μm or less. By being formed of a film having a thickness of 40 μm or more and 80 μm or less, a predetermined strength is obtained. In this way, for the packaging body 1, it is possible to more reliably prevent the case where the surface of the packaging body 1 is accidentally torn by a pressed finger.

[0086] The packaging bag 3 has an up-down direction T, and a width direction W and a depth direction D intersecting the up-down direction T. The packaging bag 3 has an upper surface portion 10, a front surface portion 11, a rear surface portion 12, a right surface portion 13, and a left surface portion 14. The packaging bag 3 also has a bottom surface portion 16 formed by heat-sealing the lower end portions in the up-down direction T of the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 to each other. The packaging bag 3 surrounds the plurality of absorbent articles 2 with the upper surface portion 10, the front surface portion 11, the rear surface portion 12, the right surface portion 13, the left surface portion 14, and the bottom surface portion 16. The total weight of the plurality of absorbent articles 2 stored in the packaging bag 3 is, for example, 800 g or more and 3500 g or less, and preferably 1100 g or more and 2300 g or less. In the following description, the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 are sometimes collectively referred to as side surface portions. The side surface portions include a region between the outer edge of the bottom surface portion 16 and the end edge 2TE of the upper side of the plurality of absorbent articles 2 in the up-down direction T, and the opening and sealing intended region 7 described later.

[0087] The upper surface portion 10 is a portion disposed on the upper surface of the packaging body 1, and is a portion on the upper side in the vertical direction T than the opening seal scheduled regions 7 of the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14, respectively. A certain region of the upper surface portion 10 having a length in the width direction W and the depth direction D is referred to as a grip scheduled region 6. The grip scheduled region 6 can include at least a portion of the center between the end portions in the width direction W and the depth direction D of the upper surface portion 10, both end portions in the width direction W, and both end portions in the depth direction D of the upper surface portion 10. Specifically, the grip scheduled region 6 is a belt-shaped region from the center in the width direction W and the depth direction D to both end portions in the width direction W of the upper surface portion 10. The front surface portion 11 and the rear surface portion 12 are portions constituting the front surface and the rear surface of the packaging body 1 (the packaging bag 3), and the direction from one of the front surface portion 11 and the rear surface portion 12 toward the other is the depth direction D. The right surface portion 13 and the left surface portion 14 are portions constituting the right surface and the left surface of the packaging body 1 (the packaging bag 3), and the direction from one of the right surface portion 13 and the left surface portion 14 toward the other is the width direction W. The extending direction of the cylinder constituted by the front surface portion 11, the right surface portion 13, the rear surface portion 12, and the left surface portion 14 adjacent to each other is the vertical direction T.

[0088] The grip scheduled region 6 of the upper surface portion 10 includes a joint portion 17 in which the upper end portions in the vertical direction T of the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 are heat-welded to each other. The joint portion 17 includes a handle portion 18. The handle portion 18 has an opening 24 formed by cutting the joint portion 17 in the thickness direction. The opening 24 has a curved inner edge. The handle portion 18 has a curved handgrip portion 25 facing the opening 24. The inner edge of the opening 24 is a substantially elliptical shape having the width direction W as the long diameter, and is interrupted at the lower end. That is, the handle portion 18 has a handle piece 26 which is outlined as an ellipse and is connected to the joint portion 17 at the lower end. The handle portion 18 is a portion divided by the edge of the upper end of the joint portion 17 and the handgrip portion 25. Furthermore, the handle portion 18 is not limited to the above-described structure, and can be appropriately changed as long as the function of gripping is exerted. That is, in the present embodiment, the handle piece 26 is not a necessary structure. For example, it can be that, with respect to the handle portion 18, the opening 24 is a substantially elliptical shape without being interrupted at the lower end, and does not have the handle piece 26.

[0089] The package 1 (the packaging bag 3) has a corner portion 19 at a portion where the side portions adjacent to each other intersect with each other. That is, the corner portion 19 is provided at a portion where the front surface portion 11 and the right surface portion 13 intersect with each other, a portion where the front surface portion 11 and the left surface portion 14 intersect with each other, a portion where the rear surface portion 12 and the right surface portion 13 intersect with each other, and a portion where the rear surface portion 12 and the left surface portion 14 intersect with each other. Here, if a portion on the boundary line CL between the side portions adjacent to each other is referred to as a top portion 20, the top portion 20 is present at the boundary between the front surface portion 11 and the right surface portion 13, the boundary between the front surface portion 11 and the left surface portion 14, the boundary between the rear surface portion 12 and the right surface portion 13, and the boundary between the rear surface portion 12 and the left surface portion 14. Therefore, the corner portion 19 is a region including the top portion 20. Further, Figure 3 is a view in which the packaging bag 3 is cut at the boundary line CL between the rear surface portion 12 and the left surface portion 14 and is developed.

[0090] In the present embodiment, the packaging bag 3 has a shape of a rectangular parallelepiped, and the front surface portion 11, the rear surface portion 12, the right surface portion 13, and the left surface portion 14 each have a shape of a rectangle. Among them, the package 1 is mainly composed of a sheet member that is easily deformed and an absorbent article, and thus can not have a strict shape of a rectangular parallelepiped. For example, a portion or all of the side portions and a portion or all of the corner portions 19 can have a curved surface, can have a roundness, or can have a concave-convex shape, like a state in which the absorbent article 2 is housed in the packaging bag 3 in a compressed manner and then the absorbent article 2 is expanded to stretch the packaging bag 3 from the inside. Further, the size of the package 1 (the packaging bag 3) is not particularly limited, but for example, the length in the width direction W can be 10 cm to 80 cm, the length in the depth direction D can be 10 cm to 80 cm, and the length in the up-down direction T can be 10 cm to 100 cm.

[0091] The packaging bag 3 has a first weakened line 21 in an opening intended area 7. The opening intended area 7 is an area between the outer edge of the holding intended area 6 of the upper surface portion 10 and the upper side end edge 2TE of the plurality of absorbent articles 2 in the up-down direction T. In the case of the present embodiment, the area from the upper end of the coupling portion 17 in the up-down direction T to a position on the upper side of the portion in which the first weakened line 21 and the second weakened line 22 are formed is the holding intended area 6, and the area from the portion in which the first weakened line 21 and the second weakened line 21 are formed in the up-down direction T to the end edge 2TE is the opening intended area 7. The opening intended area 7 includes the corner portion 19 at the portion where the side surface portions adjacent to each other intersect each other. The first weakened line 21 includes a plurality of perforations formed at intervals in the column direction of the packaging bag 3. The plurality of perforations penetrate the sheet member of the packaging bag 3 in the thickness direction. The first weakened line 21 is, for example, a tearable line, and the packaging bag 3 is torn along the first weakened line 21 by pulling the portions on both sides of the first weakened line 21 in the direction in which they are torn from each other, thereby cutting the portions of the packaging bag 3 between the perforations. The tearing strength of the first weakened line 21 is 4 N or less.

[0092] The tearing strength of the first weakened line 21 indicates the maximum load (tearing strength) (N) measured when the sheet member having the first weakened line 21 on both sides of the end portion in the direction parallel to the stretching direction is torn by the tensile testing machine. The specific steps of the measurement are as follows. (a) A test piece 100 composed of a sheet member having a width of 50 mm and a length of 75 mm including a weakened line 121 parallel to the long side from the center of the short side is prepared. Figure 4 (b) As shown in FIG. 10, the test piece 100 is held on the tensile testing machine (manufactured by Instron Corporation) 102 with the distance H between the chucks set to 10 mm, and the tensile strength is measured at a stretching speed of 300 mm / minute. Figure 5 (c) The maximum strength measured is taken as the tearing strength (N) of the test piece (weakened line). In addition, the test piece 100 need not necessarily be 50 mm in width and 75 mm in length, and may be, for example, 50 mm in width and 50 mm in length. Furthermore, the weakened line 121 is not limited to the case of being parallel to the long side of the test piece 100, but may be along the long side.

[0093] It is preferable that the tearing strength of the first weakened line 21 be smaller than the puncture strength of the sheet member forming the packaging bag 3. The puncture strength is the breaking strength of the sheet member when a predetermined jig is punctured in the sheet member. The measurement test of the puncture strength is a test in which the sheet member is taken as a test piece, the test piece is placed on the upper surface of a test piece stage and is fixed by a fixing member or the like, a jig configured to be able to penetrate the hole portion extending inward from the upper surface of the test piece stage is caused to penetrate the test piece from above the test piece and penetrate the hole portion, and the load applied to the jig is measured. The puncture test is specifically performed as follows.

[0094] (a) The sheet member was cut into 70 mm x 70 mm as a test sample, respectively.(b) The test sample was placed on the upper surface of a test sample stage and fixed by a fixing member or the like. A hole portion (diameter 60 mm x depth 110 mm) extending to the inside of the test sample stage was formed on the upper surface of the test sample stage, and the test sample was fixed so as to cover the hole portion.(c) A digital force gauge FGP-5 (manufactured by Shinko New Products Co., Ltd.) to which a cylindrical jig (diameter 11 mm x length 100 mm) having a linear tip end of 10 mm in length was attached was prepared.(d) The jig was lowered from above the test sample at a speed of 500 mm / min, and the load applied to the jig until the test sample was broken and the jig penetrated the test sample was measured. The maximum load at this time was set as the breaking strength (N) of the sheet member (packaging bag 3). The measurement was performed in two cases where the length direction of the tip end of the jig was arranged parallel to the fiber direction of the sheet member and where the length direction of the tip end of the jig was arranged orthogonal to the fiber direction of the sheet member.

[0095] For the packaging body 1, there is a predetermined relationship between the tensile strength of the first weakening line 21 and the plurality of absorbent articles housed in the packaging bag 3. That is, if the tensile strength of the first weakening line 21 of 25 mm in length with respect to the pulling force in the up-down direction T is set as A (N / 25 mm) and the total weight of the plurality of absorbent articles 2 housed in the packaging bag 3 is set as B (kg), A and B have the following relationship.

[0096] A / B ≥ 3.5 (N / 25 mm / kg) (Formula)

[0097] The tensile strength per unit weight (N / 25 mm / kg) of the first weakening line 21 in the packaging body 1 is obtained by dividing the tensile strength A (N / 25 mm) by the total weight B (kg) of the plurality of absorbent articles 2 housed in the packaging bag 3.

[0098] The tensile strength A (N) of the first weakening line 21 indicates the maximum load (tearing strength) (N / 25 mm) measured when the sheet member having the first weakening line 21 formed in the direction orthogonal to the stretching direction is torn by pulling the end portions of the sheet member on both sides of the first weakening line 21 in the stretching direction using a tensile testing machine. “N / 25 mm” indicates the tearing strength (N) per 25 mm width.

[0099] The specific steps of the measurement are described below.(a) A test sample 103 was prepared from a sheet member having a width of 25 mm x length of 100 mm including a weakening line 121 parallel to the short side from the center of the long side.(b) As shown in FIG. 10, the test sample 103 was placed on the upper surface of a test sample stage and fixed by a fixing member or the like. A hole portion (diameter 60 mm x depth 110 mm) extending to the inside of the test sample stage was formed on the upper surface of the test sample stage, and the test sample was fixed so as to cover the hole portion.(c) A digital force gauge FGP-5 (manufactured by Shinko New Products Co., Ltd.) to which a cylindrical jig (diameter 11 mm x length 100 mm) having a linear tip end of 10 mm in length was attached was prepared.(d) The jig was lowered from above the test sample at a speed of 500 mm / min, and the load applied to the jig until the test sample was broken and the jig penetrated the test sample was measured. The maximum load at this time was set as the breaking strength (N) of the sheet member (packaging bag 3). The measurement was performed in two cases where the length direction of the tip end of the jig was arranged parallel to the fiber direction of the sheet member and where the length direction of the tip end of the jig was arranged orthogonal to the fiber direction of the sheet member. Figure 6The distance H between the chucks was set to 60 mm on a tensile testing machine (manufactured by Instron Corporation) 102, and the tensile strength was measured at a tensile speed of 500 mm / min while holding the test piece 103 including the weakening line.(c) The maximum strength measured was set as the tensile strength of the test piece (N / 25 mm). In addition, the test piece 103 need not necessarily be 25 mm in width and 100 mm in length, and can be, for example, 25 mm in width and 30 mm in length. Furthermore, the weakening line 121 is not limited to the case where it is parallel to the short side of the test piece 103, but can be along the short side.

[0100] The first weakening line 21 is formed so as to span at least one of the corners 19 that are end regions. In the case of the present embodiment, the first weakening line 21 is formed at each corner 19. The first weakening line 21 is formed so as to span the corner 19 of the front surface portion 11 and the right surface portion 13, in a range from the right surface portion 13 side end portion in the width direction W of the front surface portion 11 to the front surface portion 11 side end portion in the depth direction D of the right surface portion 13. Similarly, the first weakening line 21 is formed so as to span the corner 19 of the front surface portion 11 and the left surface portion 14, in a range from the left surface portion 14 side end portion in the width direction W of the front surface portion 11 to the front surface portion 11 side end portion in the depth direction D of the left surface portion 14. The first weakening line 21 is formed so as to span the corner 19 of the rear surface portion 12 and the right surface portion 13, in a range from the right surface portion 13 side end portion in the width direction W of the rear surface portion 12 to the rear surface portion 12 side end portion in the depth direction D of the right surface portion 13. The first weakening line 21 is formed so as to span the corner 19 of the rear surface portion 12 and the left surface portion 14, in a range from the left surface portion 14 side end portion in the width direction W of the rear surface portion 12 to the rear surface portion 12 side end portion in the depth direction D of the left surface portion 14.

[0101] The packaging bag 3 can also have a second weakening line 22 in the opening and sealing intended region 7. The second weakening line 22 includes a plurality of perforations formed at intervals in the column direction of the packaging bag 3. The plurality of perforations penetrate the sheet member of the packaging bag 3 in the thickness direction. The second weakening line 22 is, for example, a tearable line, and by pulling the portions on both sides of the second weakening line 22 in directions away from each other, the portions of the packaging bag 3 between the perforations are cut and separated along the second weakening line 22.

[0102] The second weakened line 22 is formed in a range larger than the range in which the first weakened line 21 is formed, in the opening-unlocking scheduled region 7. The second weakened line 22 is formed in each of the regions extending along the width direction W of the front surface portion 11 and the rear surface portion 12, which are central regions, and the regions extending along the depth direction D of the right surface portion 13 and the left surface portion 14. The second weakened line 22 is formed in the upper portion in the up-down direction T of the front surface portion 11, extending along the width direction W from the vicinity of the corner portion 19 of the front surface portion 11 and the right surface portion 13 to the vicinity of the corner portion 19 of the front surface portion 11 and the left surface portion 14. Similarly, the second weakened line 22 is formed in the upper portion in the up-down direction T of the rear surface portion 12, extending along the width direction W from the vicinity of the corner portion 19 of the rear surface portion 12 and the right surface portion 13 to the vicinity of the corner portion 19 of the rear surface portion 12 and the left surface portion 14. The second weakened line 22 is formed in the upper portion in the up-down direction T of the right surface portion 13, extending along the depth direction D from the vicinity of the corner portion 19 of the right surface portion 13 and the front surface portion 11 to the vicinity of the corner portion 19 of the right surface portion 13 and the rear surface portion 12. The second weakened line 22 is formed in the upper portion in the up-down direction T of the left surface portion 14, extending along the depth direction D from the vicinity of the corner portion 19 of the left surface portion 14 and the front surface portion 11 to the vicinity of the corner portion 19 of the left surface portion 14 and the rear surface portion 12.

[0103] The coupling portion 17 can have a high-rigidity portion 28 formed by embossing and heat fusion. The high-rigidity portion 28 is located at the lower end in the up-down direction T of the coupling portion 17, that is, at a position in the up-down direction T of the high-rigidity portion 28 between the handle portion 18 and the first weakened line 21, and extends over the entire region in the width direction W of the upper surface portion 10. The high-rigidity portion 28 has a plurality of embossed portions 30. The embossed portions 30 are arranged in a row at predetermined intervals in the width direction W of the coupling portion 17. The high-rigidity portion 28 is provided on both sides in the up-down direction T across the opening 24 of the handle portion 18. The high-rigidity portion 28 can also be provided at the upper end of the coupling portion 17.

[0104] The handle portion 18 can have a reinforcing film 31. The reinforcing film 31 can be formed of, for example, a resin film such as polyethylene or polypropylene. The reinforcing film 31 has an area larger than the opening 24, and has an opening 36 of the same size at a position overlapping the opening 24. The upper end portion and the lower end portion of the reinforcing film 31 are heat-fused and joined to the coupling portion 17 at the high-rigidity portion 28.

[0105] Figure 7 is a schematic view showing an example of the structure of the first weakened line 21 and an example of the structure of the second weakened line 22 of the packaging body 1 according to the embodiment. Specifically, Figure 7is a schematic view showing the positional relationship of the corner 19 and the first and second weakening lines 21 and 22 in the vicinity thereof along the surface of the packaging body 1 (the packaging bag 3).

[0106] The first weakening line 21 can also be formed at a position lower than the center in the up-and-down direction T within the opening-preliminary region 7. That is, the first weakening line 21 can also be formed at a position lower than the second weakening line 22 in the up-and-down direction T. The first weakening line 21 can also be provided so as to intersect the width direction. As shown in Figure 7 The first weakening line 21 can also be curved so as to have a shape that has the top 20 as a vertex and projects toward the lower side in the up-and-down direction T.

[0107] The first weakening line 21 can also be formed so as to be axially symmetrical with respect to the boundary line CL. In this case, in the corner 19 in which the first weakening line 21 is provided, the first weakening line 21 overlaps in the up-and-down direction T on both sides of the top 20 in the case where the first weakening line 21 is folded at the top 20.

[0108] The length of the row direction of the perforations 32 of the first weakening line 21 is set as LI, and the length of the row direction of the intervals 33 of the first weakening line 21 is set as Dl. The length LI is the minimum length from one end to the other end of the row direction of the perforations 32. The length Dl is the shortest distance between the ends of the perforations 32 adjacent to each other in the row direction. The length LI of the row direction of the perforations 32 of the first weakening line 21 can also be equal to or shorter than the length Dl of the row direction of the intervals 33 of the first weakening line 21. That is, the length LI of the perforations 32 can be the same as or shorter than the length Dl of the intervals 33. The length LI of the perforations 32 and the length Dl of the intervals 33 preferably have a relationship of LI : Dl = 1 : 2. The distance D3 from the top 20 to the end of the first weakening line 21, that is, from the top 20 to the end of the perforation 32 of the first weakening line 21 closest thereto, is shorter than the length Dl described above.

[0109] The length of the row direction of the perforations 34 of the second weakening line 22 is set as L2, and the length of the row direction of the intervals 35 of the second weakening line 22 is set as D2. The length L2 is the minimum length from one end to the other end of the row direction of the perforations 34. The length D2 is the shortest distance between the ends of the perforations 34 adjacent to each other in the row direction. At least one of the length LI of the perforations 32 of the first weakening line 21 and the length L2 of the perforations 34 of the second weakening line 22, and the length Dl of the intervals 33 of the first weakening line 21 and the length D2 of the intervals 35 of the second weakening line 22 is different. That is, the lengths LI, L2, Dl, and D2 can be adjusted so that the tensile strength and the tear strength of the second weakening line 22 are higher than those of the first weakening line 21.

[0110] For example, in a case where the length LI of the first weakened line 21 and the length L2 of the second weakened line 22 are the same, the length Dl of the first weakened line 21 and the length D2 of the second weakened line 22 are different. In this case, the length Dl of the first weakened line 21 can be shorter than the length D2 of the second weakened line 22. Or, in a case where the length Dl of the first weakened line 21 and the length D2 of the second weakened line 22 are the same, the length LI of the first weakened line 21 and the length L2 of the second weakened line 22 are different. In this case, the length LI of the first weakened line 21 can be longer than the length L2 of the second weakened line 22. That is, the length LI in the row direction of the holes of the first weakened line 21 can be longer than the length L2 in the row direction of the holes of the second weakened line 22. The ratio (LI / Dl) of the length LI of the first weakened line 21 to the length Dl can be larger than the ratio (L2 / D2) of the length L2 of the second weakened line 22 to the length D2. For example, the ratio (LI / Dl) can be set to 0.4 to 0.6, and the ratio (L2 / D2) can be set to 0.1 to 0.3.

[0111] The adjacent first weakened line 21 and second weakened line 22 are separated from each other. If the distance between the adjacent first weakened line 21 and second weakened line 22 is set to D4, the distance D4 is longer than the length D2 of the first weakened line 21. The adjacent first weakened line 21 and second weakened line 22 are separated by a distance longer than the length Dl of the first weakened line 21 in the row direction of the interval. Further, the distance D4 is the shortest distance measured along the surface of the packaging bag 3. The distance D4 is preferably set to maintain sufficient strength with respect to the pulling force in the up-and-down direction T at the time of carrying, and to smoothly tear from the first weakened line 21 to the second weakened line 22 at the time of opening.

[0112] The distance D4 is also dependent on the size of the packaging body 1, but can be 0.1 cm to 4 cm, and is preferably 0.5 cm to 3 cm. If the distance D4 is in the above range, the pulling force acting on the portion of the packaging bag 3 within the opening scheduled region 7 can be dispersed to the first weakened line 21 and second weakened line 22, respectively, and the case where the force in the tearing direction is difficult to transmit can be suppressed.

[0113] Next, a manufacturing method of the packaging body 1 of the embodiment will be described.

[0114] Figure 8 is a schematic view showing an example of a manufacturing method of the packaging body 1 of the embodiment. In this manufacturing method, as an example, a manufacturing method of the packaging body 1 of the tuck-in type will be described. In this manufacturing method, in the conveyance of the materials and the like in each process, a conveyance direction MD, a cross direction CD, and a thickness direction TD (not shown) orthogonal to each other are provided.

[0115] First, a packaging bag 3 capable of housing a plurality of absorbent articles 2 is formed. The method of forming the packaging bag 3 includes a side forming process and a line of weakness forming process.

[0116] In the side forming process, the sheet member 50 (a) of the resin in a cylindrical shape extending along the conveying direction MD is folded in a valley fold so that both sides in the cross direction CD are respectively folded toward the inner side in the cross direction CD. Thus, in the side forming process, the front surface portion 11 and the back surface portion 12 respectively located on one side and the other side in the thickness direction TD, and the right surface portion 13 and the left surface portion 14 respectively located on the right side and the left side in the cross direction CD and folded between the front surface portion 11 and the back surface portion 12 are formed (b). Figure 8 Figure 8 At this time, the front surface portion 11 and the back surface portion 12 overlap in the thickness direction TD, and the right side of the front surface portion 11 and the back surface portion 12 and the right surface portion 13 overlap in the thickness direction TD, and the left side of the front surface portion 11 and the back surface portion 12 and the left surface portion 14 overlap in the thickness direction TD.

[0117] In the line of weakness forming process, a line of weakness forming blade (not shown) is pressed from one side toward the other side (in the thickness direction TD) of the front surface portion 11 and the back surface portion 12. For example, the folded sheet member 50 is sandwiched between a roller having the line of weakness forming blade and an anvil roller. Thus, in the line of weakness forming process, the first line of weakness 21 and the second line of weakness 22 extending along the cross direction CD are formed in the front surface portion 11 and the back surface portion 12. At the same time, the first line of weakness 21 and the second line of weakness 22 extending along the cross direction CD are formed in the right surface portion 13 and the left surface portion 14 located between the front surface portion 11 and the back surface portion 12 and overlapping in the thickness direction TD. At this time, the first line of weakness 21 and the second line of weakness 22 are formed so as to have a distance D4 longer than the length D1 of the first line of weakness 21. In addition, the second line of weakness 22 can be formed at a position such that, when the packaging body 1 is lifted while holding the upper surface portion 10 after the severing of at least one of the adjacent first lines of weakness 21, the severing of the first line of weakness 21 does not reach the second line of weakness 22 even if the severing is transmitted to the corner portion 19 due to the weight of the plurality of absorbent articles 2. At the same time, the handle portion 18 can be formed. The packaging bag 3 is formed as described above (c). Figure 8

[0118] At this time, if the packaging bag 3 of (c) is cut along the division line CL of the back surface portion 12 and the left surface portion 14 and spread, it becomes Figure 8 Figure 3 ​​​That is, a region STA including the boundary line CL of the right surface portion 13 and the front surface portion 11 is considered. The region STA is a region in which the width along the direction (width direction W and depth direction D) of the surface of the packaging bag 3 parallel to the bottom surface portion 16 is the same as the width of the right surface portion 13, and the center along the direction (width direction W and depth direction D) of the surface of the packaging bag 3 parallel to the bottom surface portion 16 is the boundary line CL of the right surface portion 13 and the front surface portion 11. At this time, in the region STA, the first weakening line 21 that crosses the boundary line CL is axially symmetrical with respect to the boundary line CL. Further, the second weakening line 22 of the front surface portion 11 and the second weakening line 22 of the right surface portion 13 adjacent to the both sides of the boundary line CL are axially symmetrical with respect to the boundary line CL. The same applies to the region STA (not shown) including other boundary lines CL. For example, in the region STA including the boundary line CL of the right surface portion 13 and the back surface portion 12, the width of which is the same as the width of the right surface portion 13, the first weakening line 21 that crosses the boundary line CL, the second weakening line 22 of the back surface portion 12, and the second weakening line 22 of the right surface portion 13 adjacent thereto are axially symmetrical with respect to the boundary line CL. In addition, in the region STA including the boundary line CL of the left surface portion 14 and the front surface portion 11, the width of which is the same as the width of the left surface portion 14, the first weakening line 21 that crosses the boundary line CL, the second weakening line 22 of the front surface portion 11, and the second weakening line 22 of the left surface portion 14 adjacent thereto are axially symmetrical with respect to the boundary line CL. In addition, in the region STA including the boundary line CL of the left surface portion 14 and the back surface portion 12, the width of which is the same as the width of the left surface portion 14, the first weakening line 21 that crosses the boundary line CL, the second weakening line 22 of the back surface portion 12, and the second weakening line 22 of the left surface portion 14 adjacent thereto are axially symmetrical with respect to the boundary line CL.

[0119] Then, the portion of the packaging bag 3 on the bottom surface side is heat-sealed to form the bottom surface portion 16. Next, the plurality of absorbent articles 2 is housed from the upper surface side of the packaging bag 3. Finally, the portion of the packaging bag 3 on the upper surface side is heat-sealed to form the joining portion 17. The packaging body 1 of the hem type is formed as described above. The corner portion 19 is a portion in which the right side and the left side of the front surface portion 11 and the back surface portion 12, respectively, toward the width direction W are valley-folded.

[0120] Figure 9 is a schematic view showing a state in which the packaging body 1 of the embodiment is completely or partially opened. As shown in FIG. 8, the packaging body 1 is opened by pulling the corner portion 19 of the front surface portion 11 and the back surface portion 12. The corner portion 19 is a portion in which the right side and the left side of the front surface portion 11 and the back surface portion 12, respectively, toward the width direction W are valley-folded. The corner portion 19 is a portion in which the right side and the left side of the front surface portion 11 and the back surface portion 12, respectively, toward the width direction W are valley-folded. Figure 9In the case of (a) shown in FIG. 1, the breakage of the first weakened line 21 and the breakage of the second weakened line 22 are performed in all of the plurality of side surface portions in the state where the packaging body 1 is completely opened. That is, the user pinches the corner portion 19 with fingers and tears the corner portion 19 along the first weakened line 21. Thereby, the first cut line 21a is formed in the packaging bag 3. Next, the user tears the packaging bag 3 along the second weakened line 22 adjacent to the first weakened line 21. Thereby, the second cut line 22a is formed in the packaging bag 3. In this way, the first cut line 21a and the second cut line 22a are formed in all of the plurality of side surface portions, the upper surface portion 10 is removed, and the opening portion OP is formed. The user can take out the absorbent article 2 from the opening portion OP. On the other hand, in the case of (b) shown in FIG. 2, the breakage of the first weakened line 21 and the breakage of the second weakened line 22 are performed in part of the plurality of side surface portions (example: the front surface portion 11, the right surface portion 13, and the left surface portion 14) in the state where the packaging body 1 is partially opened. Thereby, the first cut line 21a and the second cut line 22a are formed in part of the plurality of side surface portions (example: the front surface portion 11, the right surface portion 13, and the left surface portion 14), and the opening portion OP is formed. The user can take out the absorbent article 2 from the opening portion OP. Further, the user can carry the packaging body 1 with the hand H holding the handle portion 18 of the joining portion 17 in the state where the upper surface portion 10 is joined to the remaining part of the plurality of side surface portions (example: the rear surface portion 12). Figure 9

[0121] The tearing strength of the first weakened line 21 is 4 N or less, whereby the corner portion 19 can be easily torn, and thus the first weakened line 21 can be the starting point at the time of opening. Therefore, the packaging body 1 can be easily opened with the first weakened line 21 as the starting point. That is, the first weakened line 21 can be the opening start portion that is the starting point at the time of opening.

[0122] The first weakened line 21 is provided in the opening predetermined region 7 between the outer edge of the holding predetermined region 6 and the end edge 2TE on the upper side of the plurality of absorbent articles 2 in the vertical direction T. That is, the first weakened line 21 is located on the line of action of the force that the absorbent article 2 accommodated in the packaging bag 3 exerts on the handle portion 18 in the case where the handle portion 18 is held while holding the holding predetermined region 6. Thus, in the case of carrying, that is, in the case where the packaging body 1 is lifted up while holding the handle portion 18, the force acting on the handle portion 18 also acts on the first weakened line 21. The tensile strength A of the first weakened line 21 with respect to the pulling force in the vertical direction T and the total weight B of the plurality of absorbent articles 2 have a relationship of A / B ≥ 3.5 (N / 25 mm / kg), whereby the case where the first weakened line 21 is torn as the starting point due to the force acting on the handle portion 18 at the time of carrying can be prevented. Therefore, it can be said that the packaging body 1 has durability at the time of carrying.

[0123] ​It is preferable that the packaging bag 3 be able to balance durability and ease of opening. The total weight of the plurality of absorbent articles 2 housed in the packaging bag 3 differs depending on the use and the number. For example, in a case where the same packaging bag is applied to packaging bodies in which the total weight of the plurality of absorbent articles housed differs, there is a case where the durability of the packaging bag is excessive. That is, in a case where a packaging bag formed so as to face a packaging body in which the total weight is large is applied to a packaging body in which the total weight is small, it can be said that the durability of the packaging bag is excessive. By applying a packaging bag in which a sheet member having a lower strength is used to a packaging body in which the total weight is small, it is possible to avoid waste of the sheet member, and it is possible to more appropriately obtain durability and openability. In the packaging bag 3 of the present embodiment, the tear strength of the first weakening line 21 is 4 N or less, and the tensile strength A (N / 25 mm) of the first weakening line 21 and the total weight B (kg) of the plurality of absorbent articles 2 housed in the packaging bag 3 have the above-described relationship, whereby it is possible to obtain a packaging body including a first weakening line 21 having an appropriate tear strength and tensile strength that match the total weight. That is, by forming the sheet member and the first weakening line 21 so as to match the total weight, it is possible to obtain a packaging body 1 in which durability and ease of opening are more reliably balanced.

[0124] The force acting on the portion of the packaging bag 3 located in the opening intended region 7 differs depending on the presence or absence of the handle portion 18, the position of the handle portion 18, and the shape of the handle portion 18. At least one of the length LI of the first weakening line 21 and the length L2 of the second weakening line 22 and the length Dl of the first weakening line 21 and the length D2 of the second weakening line 22 differs. That is, depending on the position in the opening intended region 7, at least one of the length in the row direction of the plurality of perforations of the first weakening line 21 and the second weakening line 22 and the length in the row direction of the interval is appropriately changed, whereby it is possible to more reliably adjust the durability at the time of carrying and the ease of opening of the packaging body 1.

[0125] In this case, the lengths LI, L2, Dl, D2 are adjusted so that the tensile strength and the tear strength of the second weakening line 22 are higher than those of the first weakening line 21, whereby it is possible to prevent the second weakening line 22 from being torn at the time of carrying, and it is possible to form a larger opening portion in a larger range. That is, the second weakening line 22 can become an opening expansion portion that forms a larger opening portion after the first weakening line 21 becomes a starting point.

[0126] The length LI in the row direction of the perforations of the first weakening line 21 is Dl or less, whereby it is possible to suppress deformation of the perforations caused by the pulling force in the up-down direction T. It is thus possible to prevent the adjacent perforations from being connected and the packaging bag 3 from being torn with the first weakening line 21 as a starting point due to deformation of the perforations at the time of carrying. It is thus possible to prevent the packaging bag 3 from being torn at the time of carrying for the packaging body 1.

[0127] If the distance between the adjacent first weakened line 21 and the second weakened line 22 is set as D4, the distance D4 is longer than the length D2 of the first weakened line 21. Thus, in the packaging bag 3, the force acting when the holding handle portion 18 is gripped is dispersed to the first weakened line 21 and the second weakened line 22, respectively. Thus, it is possible to suppress the case where the adjacent first weakened line 21 and the second weakened line 22 affect each other, that is, the case where the first weakened line 21 and the second weakened line 22 are torn in a chain. Therefore, it is possible to prevent the case where the packaging bag 3 is torn during the carrying of the packaging body 1.

[0128] In the packaging body 1, since the first weakened line 21 is provided so as to cross the top portion 20 of at least one of the corner portions 19, it is possible to easily perform the opening by tearing the packaging bag 3 from the first weakened line 21 as a starting point with the corner portion 19 gripped by the fingers. Further, in the corner portion 19, the distance from the top portion 20 to the end portion of the first weakened line 21 is shorter than the length in the column direction, that is, the interval between the adjacent perforations, and thus it is possible to more easily tear the packaging bag 3 from the first weakened line 21 as a starting point.

[0129] Since the corner portion 19 is formed by folding the right surface portion 13 and the left surface portion 14 so as to be valley-folded inward in the direction crossing the vertical direction T between the front surface portion 11 and the front surface portion 11, respectively, it is possible to more easily grip the corner portion 19 with the fingers. Thus, it is possible to more easily perform the opening by tearing the packaging bag 3 from the first weakened line 21 as a starting point with the corner portion 19 gripped by the fingers. Further, the second weakened line 22 is provided in a larger range of the front surface portion 11 and the rear surface portion 12, the length LI in the column direction of the perforation of the first weakened line 21 is longer than the length L2 in the column direction of the perforation of the second weakened line 22, or the ratio (LI / D1) of the length LI of the first weakened line 21 with respect to the length D1 is larger than the ratio (L2 / D2) of the length L2 of the second weakened line 22 with respect to the length D2. Thus, the tensile strength of the second weakened line 22 with respect to the pulling force in the vertical direction is higher than the tensile strength of the first weakened line 21 with respect to the pulling force in the vertical direction, and thus it is possible to prevent the case where the second weakened line 22 is torn during the carrying.

[0130] In the corner portion 19 where the first weakened line 21 is provided, the first weakened line 21 overlaps in the vertical direction T across both sides of the top portion 20. For the packaging body 1, since the force when tearing with the corner portion 19 gripped by the fingers is not dispersed, it is possible to more easily tear the packaging bag 3, and as a result, it is possible to easily perform the opening.

[0131] Since the first weakened line 21 is formed at a position lower than the center in the top-bottom direction T within the opening intended region 7, a force acting on the first weakened line 21 from the portion of the packaging bag 3 located at the holding intended region 6 is dispersed through the portion of the packaging bag 3 located at the opening intended region 7. Therefore, the force acting on the first weakened line 21 is reduced, and thus it is possible to prevent the first weakened line 21 from being torn during the carrying.

[0132] The first weakened line 21 is provided to intersect the width direction, thereby dispersing the force acting on the first weakened line 21 from the portion of the packaging bag 3 located at the holding intended region 6. Therefore, it is possible to prevent the first weakened line 21 from being torn during the carrying. By the first weakened line 21 having a curved shape projecting toward the lower side in the top-bottom direction T with the top portion 20 as a vertex, it is possible to more reliably disperse the force acting on the first weakened line 21. By the first weakened line 21 having the curved shape projecting toward the lower side in the top-bottom direction T at a position lower than the second weakened line 22 in the top-bottom direction T, the force is orthogonal to the direction in which the joint portion 17 and the end edge 2TE of the upper side of the absorbent article 2 are pulled in the top-bottom direction. Therefore, during the opening, by lifting the joint portion 17 upward and pressing the end edge 2TE of the upper side of the absorbent article 2 downward, it is possible to easily tear the first weakened line 21.

[0133] Since the tensile strength of the first weakened line 21 and the tensile strength of the second weakened line 22 are smaller than the puncture strength of the packaging bag 3, during the opening, the first weakened line 21 and the second weakened line 22 are torn by the pressing finger before the surface of the packaging body 1 is pressed by the finger. Therefore, for the packaging body 1, it is possible to appropriately tear the packaging bag 3 along the first weakened line 21 and the second weakened line 22, and thus it is possible to more easily perform the opening.

[0134] Since the absorbent article 2 contains the absorbent body having a higher density at the substantially central portion in the longitudinal direction, the center of gravity is located at a position close to the crease 5. Therefore, by folding the absorbent article 2 and arranging it in the packaging bag 3 with the crease 5 as the upper side in the top-bottom direction T, the center of gravity position of the packaging body 1 becomes a position higher in the top-bottom direction T. Then, the moment of inertia of the packaging body 1 around the surface portion 10 as the center of rotation is reduced by the amount that the center of gravity position is located at a position higher. Therefore, it is possible to suppress the force acting on the first weakened line 21 in the case where the packaging body 1 is swung during the carrying, and in addition, it is possible to further reduce the impact applied to the first weakened line 21 in the case where the packaging body 1 collides against an obstacle or the like. Therefore, for the packaging body 1, it is possible to prevent the first weakened line 21 from being torn during the carrying.

[0135] The packaging bag 3 has a handle 18 within the predetermined gripping area 6, thereby determining the gripping position and stabilizing the force acting on the first weakening line 21. That is, it can prevent excessive force from being accidentally applied to the first weakening line 21. Therefore, the packaging body 1 can prevent the first weakening line 21 from being torn during handling.

[0136] The high-rigidity portion 28 disperses the force acting on the handle portion 18 throughout the entire area in the width direction W. That is, within the packaging body 1, the force acting on the handle portion 18 is absorbed by a larger area of ​​the upper surface portion 10, thereby reducing the force acting on the first weakening line 21 and preventing the first weakening line 21 from being torn during handling.

[0137] The opening 24 of the handle 25 is curved, thus preventing stress concentration in a localized area of ​​the handle 25 due to the weight of the multiple absorbent items 2 stored in the packaging bag 3. In other words, it can prevent the handle 18 from tearing or breaking from the stressed area of ​​the handle 25. Therefore, even when a lower-strength sheet material is used to form the packaging bag 3 from the viewpoint of improving openability, the durability of the handle 18 can be maintained. Therefore, the packaging body 1 possesses durability during handling.

[0138] By providing a reinforcing membrane 31 to the handle portion 18, its strength can be improved. Therefore, even if a sheet material with lower strength is used to form the packaging bag 3 from the viewpoint of improving openability, the durability of the handle portion 18 can be maintained. As a result, the packaging body 1 can possess durability during handling.

[0139] The packaging body 1 of the present invention is not limited to the above-described embodiments. As long as no technical contradictions arise, it can be applied within the scope of the purpose and spirit of the present invention by adding or replacing other technologies.

[0140] For example, although the above embodiment describes the first weakening line 21 being formed at a position lower than the center in the vertical direction T within the predetermined opening area 7, the present invention is not limited thereto. That is, as... Figure 10 As shown, the first weakening line 21 can also be formed in the predetermined area 7 of Kaifeng, at a position slightly above the center in the vertical direction T. That is, the first weakening line 21 can also be formed at a position slightly above the second weakening line 22 in the vertical direction T. Figure 10The first weakening line 21 is shown as having a shape that protrudes upward in the upward and downward direction T from the top 20. Therefore, the position of the first weakening line 21 in the packaging body 1 does not overlap the position of the absorbent article 2 housed therein. Therefore, even in a state in which the packaging body 1 is swollen due to the absorbent article 2 housed therein, the user is not affected by the swollen portion, for example, can easily pinch the vicinity of the first weakening line 21, and thus easily tear the first weakening line 21. That is, the packaging body 1 can be easily opened. In addition, the handle portion can be a single sheet member in a band shape, or can be two sheet members each of which is joined to both end portions in the width direction W of the gripping intended region 6. Further, the handle portion can be two sheet members in a band shape, and can be disposed on the front surface side and the rear surface side, respectively, and joined at both ends in the width direction of the gripping intended region 6.

[0141] Example

[0142] (Sample)

[0143] <Sheet Member>

[0144] Sheet members of polyethylene having thicknesses of 50 μm, 60 μm, and 70 μm were prepared, respectively. In each sheet member, weakening lines having different lengths and intervals of cutout were formed.

[0145] <Packaging Body>

[0146] A packaging bag having a length of 240 mm in the width direction, a length of 190 mm in the depth direction, and a height of 340 mm was formed using a sheet member having a thickness of 50 μm. A plurality of absorbent articles were housed in the interior of the packaging bag, and four kinds of packaging bodies having different weights of 2 kg to 3.5 kg were formed with a difference of 0.5 kg. The upper surface portion of the packaging body was joined by heat fusion, and a handle portion, a first weakening line, and a second weakening line were formed as shown. Figure 1

[0147] (Evaluation Method)

[0148] Using the obtained samples, a tearing test and a tensile test were performed in accordance with the above-described procedure. In addition, the Figure 11 ​The fall test machine 104 shown was used to perform a fall test. The fall test machine 104 has a support column 105 and an arm portion 106 held so as to be able to move up and down with respect to the support column 105. The state of the first weakened line was confirmed in the case where the package 1 was hung from a hook 107 provided to the arm portion 106 and caused to fall from a predetermined height. The height of the falling package 1 was set to a height at which the distance from the floor to the bottom portion 16 of the package 1 was 60 cm. The details of each sample and the results of the test are shown in Table 1 and Table 2. In Table 2, for the results of the fall test, cases in which no tear was observed at the first weakened line were marked as "0", cases in which the cutout of the first weakened line became larger were marked as "Δ", and cases in which the cutouts of the first weakened line were connected to each other and a tear was observed were marked as "X".

[0149] [Table 1]

[0150]

[0151] [Table 2]

[0152]

[0153] The results of Table 1 confirmed that the tear strength of Examples 1 to 7 were all 4 N or less. In the sensory evaluation as well, evaluations were obtained in which all of them could be torn with a relatively light force. Furthermore, although measurement was not performed for Examples 8 and 9, it can be inferred that the tear strength was less than 4 N as compared with Examples 4 to 6.

[0154] From the results of Table 2, the tensile strength of Examples 1, 4, and 7 were all 12 (N / 25 mm) or more, and even in the state in which 3.5 (kg) of the absorbent article was accommodated, no tear was observed at the first weakened line of the package in the fall test. In contrast, for Reference Example 1, a tear was observed at the first weakened line in the state in which 2.5 (kg) of the absorbent article was accommodated.

[0155] From this result, it can be said that 12.3 (N / 25 mm) is necessary in terms of having sufficient durability with respect to a weight of 3.5 (kg). Therefore, if the tensile strength is set to A (N / 25 mm) and the total weight of the absorbent article 2 is set to B (kg), from the relationship A / B ≥ 3.5 (N / 25 mm / kg), according to (12.3 [N / 25 mm] / 3.5 [kg]) = 3.5 (N / 25 mm / kg), it can be said that having a tensile strength of 3.5 (N / 25 mm / kg) through the first weakened line enables the package to have the durability required when conveying an absorbent article having a total weight of 3.5 (kg).

[0156] Puncture tests were performed on sheet members of polyethylene having a thickness of 50 μm, 60 μm, and 70 μm, and the results confirmed that the puncture strength exceeded the tear strength.

[0157] Explanation of reference signs

[0158] 1, package; 2, absorbent article; 3, package bag; 6, holding predetermined area; 10, upper surface portion; 11, front surface portion; 12, rear surface portion; 13, right surface portion; 14, left surface portion; 21, first weakening line.

Claims

1. A packaging body comprising: a plurality of absorbent articles; and a packaging bag for housing the plurality of absorbent articles, including a vertical direction, having an upper surface portion, a front surface portion, a rear surface portion, a right surface portion, and a left surface portion, wherein, The packaging bag has a first weakening line with a tear strength of less than 4N in the predetermined opening area between the outer edge of the gripping area on the upper surface of the packaging bag and the upper end edge of the plurality of absorbent articles in the vertical direction. The value (A / B) obtained by dividing the tensile strength (A) of the first weakening line with a length of 25 mm with respect to the pulling force in the vertical direction by the total weight (B) of the plurality of absorbent items housed in the packaging bag is 3.5 N / 25 mm / kg or more, wherein the unit of tensile strength is N / 25 mm and the unit of total weight is kg.

2. The packaging body according to claim 1, wherein, The first weakening line is located at the end region of the predetermined opening area in the direction intersecting the vertical direction. The central region within the predetermined area of ​​Kaifeng, in the direction intersecting the vertical direction, also has a second weakening line. The first weakening line and the second weakening line each include a plurality of notches formed at intervals in the column direction. For the first weakening line and the second weakening line, at least one of the lengths of the plurality of holes in the column direction and the lengths of the intervals in the column direction are different.

3. The packaging body according to claim 2, wherein, The length of the plurality of holes in the first weakening line in the column direction is less than or equal to the length of the interval in the column direction of the first weakening line.

4. The packaging body according to claim 2 or 3, wherein, In the predetermined area of ​​Kaifeng, the adjacent first weakening line and the second weakening line are separated from each other.

5. The packaging body according to claim 2 or 3, wherein, The packaging bag has corners within the predetermined opening area. The corner portions are the portions where the front surface portion and the right surface portion intersect, the portions where the front surface portion and the left surface portion intersect, the portions where the rear surface portion and the right surface portion intersect, and the portions where the rear surface portion and the left surface portion intersect. The first weakening line is provided such that it crosses the top of at least one of the corners. At the corner where the first weakening line is provided, the distance from the top of the corner to the end of the first weakening line is shorter than the length of the interval in the column direction.

6. The packaging body according to claim 2 or 3, wherein, The packaging bag has corners within the predetermined opening area. The corner portions are the portions where the front surface portion and the right surface portion intersect, the portions where the front surface portion and the left surface portion intersect, the portions where the rear surface portion and the right surface portion intersect, and the portions where the rear surface portion and the left surface portion intersect. The corner portion is formed by folding the right and left surface portions inward toward the inside of the packaging bag in a direction intersecting the vertical direction between the front and rear surface portions. The first weakening line is provided such that it crosses the top of at least one of the corners. The second weakening line is provided on the front surface portion and the rear surface portion. The length of the missing hole in the first weakening line in the column direction is longer than the length of the missing hole in the second weakening line in the column direction, or the ratio of the length of the missing hole in the first weakening line in the column direction to the length of the interval of the first weakening line in the column direction is greater than the ratio of the length of the missing hole in the second weakening line in the column direction to the length of the interval of the second weakening line in the column direction.

7. The packaging body according to claim 5, wherein, At the corner where the first weakening line is provided, the first weakening line overlaps on both sides of the top in the vertical direction.

8. The packaging body according to claim 2 or 3, wherein, The first weakening line is formed in the predetermined area of ​​the opening, at a position lower than the center in the vertical direction.

9. The packaging body according to claim 2 or 3, wherein, The first weakening line is formed in the predetermined area of ​​the opening, at a position higher than the center in the vertical direction.

10. The packaging body according to claim 2 or 3, wherein, The tensile strength of the first weakening line and the second weakening line relative to the pulling force in the vertical direction is less than the puncture strength of the packaging bag.

11. The packaging body according to claim 2 or 3, wherein, The packaging bag is formed from a film with a thickness of 40 μm or more and 80 μm or less.

12. The packaging body according to claim 2 or 3, wherein, The total weight of the plurality of absorbent articles is more than 800g and less than 3500g.

13. The packaging body according to claim 2 or 3, wherein, The plurality of absorbent items are folded in half, with the creases positioned on the upper side in the vertical direction.

14. The packaging body according to claim 2 or 3, wherein, The packaging bag has a handle within the predetermined gripping area.

15. The packaging body according to claim 14, wherein, The packaging bag has a high-rigidity section. The high-rigidity portion is formed by embossing. The high-rigidity portion is positioned in the vertical direction between the handle portion and the first weakening line. The high-rigidity portion extends over the entire area of ​​the upper surface portion in the direction intersecting the vertical direction.

16. The packaging body according to claim 14, wherein, The packaging bag also has a joining portion formed by joining the upper ends of the front surface portion and the rear surface portion. The handle portion is provided at the joint. The handle portion has an opening formed by cutting off the joint portion along the thickness direction. The opening has a curved handle.

17. The packaging body according to claim 14, wherein, The handle is equipped with a reinforcing membrane.

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