Individually wrapped absorbent article package

Abstract

Provided is a package for individual absorbent article wrappers that can suppress shine on a wrapper sheet and reduce friction between the individual absorbent article wrappers. [Solution] The individual packaging package 20 is a storage bag 21 containing a plurality of individual packaging bodies 10, and each of the individual packaging bodies has a first side where the opening end is located and a second side opposite the first side, and a multi-laminate section 13 with a large number of laminated layers of bonded sheets is formed, and the multi-laminate regions which are the surfaces of the multi-laminate sections on the first and second sides each include a bonded region where an adhesive layer is bonded to the packaging sheet and a non-bonded region where the adhesive layer is not bonded to the packaging sheet, the individual packaging bodies are stored in the storage bag aligned in a predetermined direction, and an adjacent surface is formed where the bonded region on the second side of one individual packaging body and the non-bonded region on the first side of an adjacent individual packaging body are in contact, and the packaging sheet in the non-bonded region on the adjacent surface has a plurality of regularly arranged first recesses and first protrusions, and the first protrusions have a hollow structure.

Description

[Technical Field]

[0001] The present invention relates to an individual absorbent article package that contains individual absorbent article packages. [Background technology]

[0002] Absorbent articles such as sanitary napkins and panty liners comprise a top sheet, a back sheet, and an absorbent body disposed between them, and are used by being fixed to underwear. For this reason, some absorbent articles are provided with an adhesive portion for fixing on the surface facing the underwear (see Patent Document 1). Such absorbent articles are individually wrapped in a packaging sheet, and multiple individually wrapped packages are stored in a storage bag in an array. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-15463 Summary of the Invention [Problem to be solved by the invention]

[0004] When the individual packages of absorbent articles are placed in a storage bag as described above, the storage bag is generally designed to be just the right size for the individual packages, and therefore the individual packages placed in the storage bag are subjected to a compressive force, with the strongest pressure being applied to the thickest portions of the individual packages.

[0005] As a result, excessive adhesion between the packaging sheet and the adhesive bonded thereto occurs, increasing the area of ​​the adhesive in contact with the packaging sheet. Furthermore, the packaging sheet is stretched in the area in contact with the adhesive to relieve the compressive force. As a result, compared to before compression, more adhesive comes into contact with the thinner packaging sheet, resulting in a shiny packaging sheet.

[0006] Furthermore, the thickest part of the individual package experiences the strongest compressive force, and in particular, in the area in contact with the adhesive, the compressive force is stronger by the thickness of the adhesive. As a result, the adhesive area between the back surface of the individual package, which has the area in contact with the adhesive, and the surface of the adjacent individual package increases, resulting in high friction when removing the individual package from the storage bag. Furthermore, the packaging sheet becomes thinner in the area in contact with the adhesive, making it more likely to tear. The adhesive exposed from the torn area can stick to the adjacent individual package, increasing friction and making it difficult to remove.

[0007] The present invention relates to a package for individual absorbent article wrappers that can suppress shine on the wrapper sheet and reduce friction between the individual wrappers. [Means for solving the problem]

[0008] An individual absorbent article package according to one embodiment of the present invention is an individual absorbent article package in which a plurality of individual absorbent article packages are accommodated in a storage bag. The individual absorbent article packaging body is formed by folding both ends of a bonding sheet in the longitudinal direction of the absorbent article, in which the absorbent article and the packaging sheet are bonded via a plurality of spaced-apart adhesive layers, and has a first side where one of the both ends, which is the opening end, is located, and a second side opposite the first side, and is formed with a thinly stacked portion where the number of layers of the bonding sheet is the minimum, and a thickly stacked portion where the number of layers of the bonding sheet is greater than the thinly stacked portion, and the absorbent article comprises a top sheet, a back sheet, and an absorbent body arranged between the top sheet and the back sheet. The first surface and the second surface each have a multi-laminate region that is a surface of the multi-laminate portion, and the multi-laminate region of the first surface includes the opening end. The multi-laminate regions of the first surface and the second surface each include a bonded region where the adhesive layer is bonded to the packaging sheet, and a non-bonded region where the adhesive layer is not bonded to the packaging sheet. The plurality of individual absorbent article packages are stored in the storage bag while aligned in a predetermined direction, and an adjacent surface is formed in which the joined area on the second surface of the individual absorbent article package and the non-jointed area on the first surface of an adjacent individual absorbent article package meet, and the packaging sheet in the non-jointed area on the adjacent surface has a plurality of regularly arranged first recesses and first protrusions, and the first protrusions have a hollow structure. [Effects of the Invention]

[0009] According to the absorbent article individual package package of the present invention, when the absorbent article individual package is placed in the storage bag, a compressive force is applied to the multi-layered region. However, by providing a first recess and a first protrusion in the non-bonded region of the first surface, the compressive force can be alleviated, thereby suppressing shine on the packaging sheet and reducing the frictional force acting on the absorbent article individual package. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a plan view of an absorbent article according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view of the absorbent article. [Figure 3] FIG. 2 is a plan view of the absorbent article and the pressure-sensitive adhesive layer. [Figure 4] FIG. 2 is a cross-sectional view of a backsheet and a pressure-sensitive adhesive layer of the absorbent article. [Figure 5] FIG. 3 is a plan view of a joined sheet in which the absorbent article and a packaging sheet are joined together. [Figure 6] FIG. 2 is a cross-sectional view of a partial configuration of the bonding sheet. [Figure 7] FIG. 2 is an enlarged cross-sectional view of a portion of the bonding sheet. [Figure 8] FIG. 3 is a plan view showing the unevenness of the packaging sheet. [Figure 9] 1 is a cross-sectional view of an individual package according to an embodiment of the present invention. [Figure 10] FIG. 2 is a plan view of a first surface of the individual package. [Figure 11] FIG. 3 is a plan view of the second surface of the individual package. [Figure 12] 1 is a cross-sectional view of an individual wrapping package according to an embodiment of the present invention. [Figure 13] FIG. 3 is a cross-sectional view showing two adjacent individual wrappers in the individual wrapper package spaced apart. [Figure 14] FIG. 2 is a cross-sectional view of a partial configuration of the two individual packages shown spaced apart from each other. [Figure 15] FIG. 2 is a cross-sectional view of a partial configuration of the two individual packages. [Figure 16] FIG. 2 is a cross-sectional view of a partial configuration of the two individual packages. [Figure 17] 4 is a cross-sectional view showing a first recess and a first protrusion provided on a packaging sheet in a non-bonded region of a first surface of the individual packaging body. FIG. [Figure 18] 3 is a schematic diagram showing a pair of compressive forces applied to the individual wrapping bodies in the individual wrapping body package. FIG. [Figure 19] 10A and 10B are schematic diagrams illustrating the occurrence of shininess on a packaging sheet. [Figure 20] 5A and 5B are schematic diagrams showing the effects of the first recess and first protrusion. [Figure 21] 4 is a cross-sectional view showing second recesses and second protrusions provided on a packaging sheet in bonded regions and non-bonded regions of a second surface of the individual packaging body. FIG. [Figure 22] 5A and 5B are schematic diagrams showing the effects of the second recess and second protrusion. [Figure 23] 10 is a plan view showing a third protrusion provided in a joining region on a second surface of the individual packaging body. FIG. [Figure 24] FIG. 4 is a cross-sectional view showing the third protrusion. [Figure 25] 5A and 5B are schematic diagrams showing the effect of the third protrusion. [Figure 26] FIG. 10 is a cross-sectional view of an absorbent article according to a modified example of the present invention. [Figure 27] FIG. 10 is a cross-sectional view of an individual package according to a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. The individual package according to the present embodiment is a package of a plurality of individual packages, each of which individually packages an absorbent article.

[0012] [Configuration of absorbent articles] The absorbent article according to this embodiment is, for example, a panty liner. Panty liners are generally attached to the crotch area of ​​underwear such as shorts during the period from the late menstrual period when the amount of menstrual blood decreases to the non-menstrual period, and are used to absorb excretions such as vaginal discharge.

[0013] As shown in Fig. 1, the absorbent article 1 according to this embodiment has a longitudinal direction X corresponding to the front-to-back direction of a wearer, and a lateral direction Y corresponding to the left-to-right direction of the wearer and perpendicular to the longitudinal direction X. Furthermore, the absorbent article 1 has a thickness direction Z perpendicular to both the longitudinal direction X and the lateral direction Y. In this specification, the term "planar view" refers to the planar view of the absorbent article 1 stretched on the XY plane and viewed from the thickness direction Z. In this specification, the term "planar shape" refers to the shape in a planar view.

[0014] 2, the absorbent article 1 includes a topsheet 2, a backsheet 3, an absorbent body 4, and an absorbent sheet 5, and is configured such that the backsheet 3, the absorbent body 4, the absorbent sheet 5, and the topsheet 2 are laminated in this order in the thickness direction Z. The components of the absorbent article 1 are joined appropriately, for example, by bonding with an adhesive or heat sealing, or by embossing.

[0015] The topsheet 2 forms the skin-facing surface 1a of the absorbent article 1. The topsheet 2 is made of a liquid-permeable sheet material. Any topsheet commonly used in absorbent articles such as panty liners and sanitary napkins can be used as the topsheet 2 without any particular restrictions. The topsheet 2 may contain, for example, a polyolefin resin such as polyethylene or polypropylene, or a polyester resin such as polyethylene terephthalate. The topsheet 2 may also contain natural fibers such as cotton fibers.

[0016] As shown in FIG. 1, the topsheet 2 is disposed over the entire surface of the absorbent article 1, for example. 1, the topsheet 2 is embossed with a dot pattern, but the embossing pattern is not limited to this. Also, the topsheet 2 does not have to have an embossed pattern.

[0017] The backsheet 3 forms the non-skin-facing surface 1b of the absorbent article 1. The backsheet 3 is preferably a liquid-impermeable sheet, and is formed from, for example, a sheet material such as a thermoplastic resin film or a laminate of such a film and a nonwoven fabric. Furthermore, from the viewpoint of enhancing wearing comfort, the backsheet 3 is preferably breathable and moisture-permeable. As shown in FIG. 1, the backsheet 3 is disposed, for example, over the entire surface of the absorbent article 1, and has the same planar shape as the topsheet 2.

[0018] The absorbent body 4 is disposed between the top sheet 2 and the back sheet 3 and absorbs excrement. The absorbent body 4 contains an absorbent material capable of absorbing excrement, and is formed, for example, from an absorbent sheet material. Examples of the sheet material that can be used include absorbent paper and various nonwoven fabrics, and may contain an absorbent polymer. In the example shown in FIG. 2, the absorbent body 4 is formed from a single folded sheet material. The planar shape of the absorbent body 4 is preferably smaller than the top sheet 2, back sheet 3, and absorbent sheet 5, and can be, for example, a rectangular shape as shown in FIG. 1.

[0019] The absorbent sheet 5 is disposed between the topsheet 2 and the absorber 4. The absorbent sheet 5 is made of an absorbent sheet material. The absorbent sheet 5 has the function of absorbing and retaining excrement. This enables the absorbent sheet 5 to, for example, temporarily retain excrement that has permeated the topsheet 2, and to reduce the return of excrement absorbed by the absorber 4 back into the topsheet 2. The absorbent sheet 5 may also have the function of promoting the absorption of excrement from the topsheet 2.

[0020] The absorbent sheet 5 may be any material commonly used in absorbent articles such as panty liners and sanitary napkins, without any particular restrictions. For example, a hydrophilic nonwoven fabric or a hydrophilic fiber assembly may be used as the absorbent sheet 5. In order to exert sufficient liquid retention function, the absorbent sheet 5 preferably has a planar shape larger than that of the absorber 4. For example, the absorbent sheet 5 may have the same planar shape as the topsheet 2 and the backsheet 3, and may be disposed over the entire surface of the absorbent article 1.

[0021] [About the adhesive layer] The adhesive layer 6 secures the absorbent article 1 to the underwear. As shown in FIG. 2, the adhesive layer 6 is formed on the non-skin-facing surface 1b of the backsheet 3, i.e., on the surface opposite the absorbent body 4. The adhesive layer 6 is made of a hot-melt adhesive from the viewpoints of reducing manufacturing costs and easily forming the adhesive layer 6 in a desired shape. As shown in FIGS. 3 and 4, a plurality of adhesive layers 6 are formed spaced apart on the non-skin-facing surface 1b. The planar shape of each adhesive layer 6 can be rectangular as shown in FIG. 3, but may be other shapes.

[0022] [About individually wrapped items] As shown in Fig. 5, the individual package according to this embodiment is composed of an absorbent article 1, an adhesive layer 6, and a packaging sheet 8. As shown in Fig. 6, the packaging sheet 8 is disposed on the adhesive layer 6 and is joined to the absorbent article 1 by the adhesive layer 6. Hereinafter, the absorbent article 1, the adhesive layer 6, and the packaging sheet 8 will be collectively referred to as a joined sheet 9.

[0023] The packaging sheet 8 can be, for example, a nonwoven fabric or a resin film made of thermoplastic resin fibers. From the viewpoint of making the adhesive less visible when the individual package is viewed from the outside, it is preferable to use a resin film whose surface facing the user is colored by ink printing. Furthermore, the packaging sheet 8 is formed with fine projections and depressions by embossing. As shown in Figs. 7 and 8, the recesses of the packaging sheet 8 are referred to as recesses 8a, and the projections of the packaging sheet 8 are referred to as projections 8b. The recesses 8a are regularly arranged, and the projections 8b have a hollow structure.

[0024] The area of ​​the recess 8a is measured using an optical microscope (e.g., VHX-5000 manufactured by Keyence Corporation) under observation at 500x magnification using an area measurement tool included in the software accompanying the optical microscope (e.g., the area measurement tool included by default in the software for "VHX-5000" manufactured by Keyence Corporation).

[0025] The area of ​​the recess 8a is set to 50 μm from the viewpoint of achieving the effects of suppressing shine and reducing compression force, which will be described later. 2 It is preferable that the thickness is 75 μm or more. 2 More preferably, it is 100 μm or more. 2 It is even more preferable that the thickness is 6000 μm or more. 2 Preferably, it is 5000 μm or less. 2 More preferably, it is 4000 μm or less. 2 It is even more preferable that the following is true: The shape of the recess 8a is not particularly limited, and may be any shape such as a polygonal shape such as a triangle, a square, or a pentagon, or a circle, an ellipse, or a star.

[0026] Both ends of the bonded sheet 9 are folded in the longitudinal direction (X direction) of the absorbent article 1. In Fig. 5, one end of the bonded sheet 9 in the longitudinal direction (X direction) is shown as end 9a, and the other end in the same direction (X direction) is shown as end 9b. A first fold line L1 and a second fold line L2 are also shown. The bonded sheet 9 is folded along the first fold line L1, and then folded along the second fold line L2. As a result, an individual package 10 according to this embodiment is formed, as shown in Fig. 9.

[0027] At this time, end 9a is folded into the inside of individual package 10. End 9b is exposed to the outside of individual package 10 and becomes the opening end. Hereinafter, the surface of individual package 10 where end 9b is located will be referred to as first surface 10a, and the surface opposite first surface 10a will be referred to as second surface 10b. A tab tape 11 is attached to first surface 10a to secure end 9b and maintain the folded shape of individual package 10.

[0028] The individual package 10 has a thinly stacked portion 12 and a multi-layered portion 13. The thinly stacked portion 12 is the portion where the number of layers of the bonded sheet 9 is the smallest, and in Fig. 9, it is the portion where the number of layers of the bonded sheet 9 is 2. The multi-layered portion 13 is the portion where the number of layers of the bonded sheet 9 is greater than the thinly stacked portion 12, and in Fig. 9, it is the portion where the number of layers of the bonded sheet 9 is 3. In the individual package 10, the two thinly stacked portions 12 are located at both ends in the longitudinal direction (X direction), and the multi-layered portion 13 is located between the two thinly stacked portions 12.

[0029] 9 and 10, the first surface 10a has a multi-laminate region 10c, and the second surface 10b has a multi-laminate region 10d as shown in Figures 9 and 11. The multi-laminate region 10c is a region of the first surface 10a that corresponds to the surface of the multi-laminate portion 13, and the multi-laminate region 10d is a region of the second surface 10b that corresponds to the surface of the multi-laminate portion 13. The multi-laminate region 10c includes an end 9b that is an opening end.

[0030] Furthermore, as shown in FIG. 10, the first surface 10a includes a bonded region 10e and a non-bonded region 10f. The bonded region 10e is a region where the pressure-sensitive adhesive layer 6 is bonded to the packaging sheet 8, and since multiple bonded regions 10e are formed at intervals on the pressure-sensitive adhesive layer 6 as described above (see FIG. 3), multiple bonded regions 10e are also arranged at intervals. The non-bonded region 10f is a region where the pressure-sensitive adhesive layer 6 is not bonded to the packaging sheet 8, and is a region of the first surface 10a other than the bonded region 10e. As shown in FIG. 10, the multi-laminate region 10c includes the bonded region 10e and the non-bonded region 10f. In the multi-laminate region 10c, the area of ​​the non-bonded region 10f is larger than the area of ​​the bonded region 10e.

[0031] The area ratio of the non-bonded region 10f in the multi-laminate region 10c is preferably 55% or more, more preferably 60% or more, and even more preferably 65% ​​or more, from the viewpoint of reliably achieving the effects of suppressing shine and reducing compression force, which will be described later. Also, from the viewpoint of bonding the absorbent article 1 and the packaging sheet 8, it is preferably 98% or less, more preferably 95% or less, and even more preferably 90% or less.

[0032] 11, the second surface 10b includes bonded regions 10g and non-bonded regions 10h. The bonded regions 10g are regions where the pressure-sensitive adhesive layer 6 is bonded to the packaging sheet 8, and since multiple bonded regions 10g are formed spaced apart on the pressure-sensitive adhesive layer 6 as described above (see FIG. 3), multiple bonded regions 10g are also arranged spaced apart. The non-bonded regions 10h are regions where the pressure-sensitive adhesive layer 6 is not bonded to the packaging sheet 8, and are regions of the second surface 10b other than the bonded regions 10g. As shown in FIG. 11, the multi-laminate region 10d includes bonded regions 10g and non-bonded regions 10h, and the bonded regions 10g and non-bonded regions 10h are alternately arranged in the multi-laminate region 10d.

[0033] [Individually wrapped package configuration] As shown in Fig. 12, the individual packaging body package 20 according to this embodiment is configured by storing a plurality of individual packaging bodies 10 in a storage bag 21. The individual packaging bodies 10 are stored in the storage bag 21 aligned in a predetermined direction, with the first surface 10a and the second surface 10b of adjacent individual packaging bodies 10 coming into contact with each other. Fig. 13 shows two adjacent individual packaging bodies 10 in the individual packaging body package 20 spaced apart. As shown in the figure, the multi-laminate region 10c of the first surface 10a and the multi-laminate region 10d of the second surface 10b are adjacent to each other between the individual packaging bodies 10.

[0034] 15 and 16, the non-bonded region 10f of the multi-laminate region 10c and the bonded region 10g of the multi-laminate region 10d are in contact with each other. Hereinafter, the surface where the non-bonded region 10f and the bonded region 10g are adjacent to each other is referred to as an adjacent surface 22, as shown in FIG.

[0035] As described above, the packaging sheet 8 in the non-bonding region 10f of the first surface 10a has the recessed portions 8a and the protruding portions 8b (see FIG. 7). Hereinafter, as shown in FIG. 17, the recessed portions 8a in the non-bonding region 10f will be referred to as first recessed portions 22a, and the protruding portions 8b will be referred to as first protruding portions 22b.

[0036] [Effects of individually wrapped packages] In the individual package 20, as described above, a plurality of individual packages 10 are contained in the storage bag 21. Generally, the storage bag 21 is designed to be just the right size for a predetermined number of individual packages 10, and so a pair of compressive forces are applied to the individual packages 10 contained in the storage bag 21, as shown by arrows F in Figure 18. At this time, the strongest compressive force is applied to the multi-laminate portion 13, which is the thickest in each individual package 10.

[0037] For this reason, there is a risk of shine occurring in the multi-laminate region 10d due to the adhesive layer 6. Fig. 19 shows the occurrence of shine when the individual package 10 is provided with a packaging sheet 30 instead of the packaging sheet 8. The packaging sheet 30 is a packaging sheet that does not have the unevenness that the packaging sheet 8 has.

[0038] When a compressive force (arrow F in the figure) is applied to the multi-laminate portion 13 as shown in Figure 19(a), the adhesion between the packaging sheet 30 and the pressure-sensitive adhesive layer 6 bonded to the packaging sheet 8 progresses excessively as shown in Figure 19(b), and the area of ​​the pressure-sensitive adhesive layer 6 bonded to the packaging sheet 30 increases. Furthermore, in the region of the packaging sheet 30 that contacts the pressure-sensitive adhesive layer 6, the packaging sheet 30 is stretched to relieve the compressive force and becomes thinner. As a result, a larger amount of the pressure-sensitive adhesive layer 6 contacts the thin packaging sheet 30 compared to before the application of the compressive force, causing the packaging sheet 30 to become shiny.

[0039] Furthermore, the compressive force is strongest in the multi-laminate portion 13, and in particular, the compressive force applied to the bonded region 10g is stronger than that applied to the non-bonded region 10h by the thickness of the adhesive layer 6. This increases the contact area between the multi-laminate region 10d having the bonded region 10g and the multi-laminate region 10c of the adjacent individual package 10, resulting in increased friction when removing the individual package 10 from the storage bag 21. Furthermore, the packaging sheet 30 becomes thinner in the region in contact with the adhesive layer 6, making it more likely to tear, and the adhesive exposed from the torn area may stick to the adjacent individual package 10, increasing the friction and making it difficult to remove.

[0040] In contrast, the individual packaging body 10 includes a packaging sheet 8 having first recesses 22a and first protrusions 22b (see FIG. 17), thereby making it possible to suppress shine. As shown in FIG. 20, the packaging sheet 8 in the multi-laminate region 10c is not fixed by the adhesive layer 6 and can move freely. Therefore, when a pair of compressive forces (arrow F in the figure) is applied, the first recesses 22a and first protrusions 22b preferentially move so as to extend in a direction perpendicular to the direction of the compressive forces (arrow S in the figure), thereby reducing the pair of compressive forces.

[0041] This reduces the compressive force applied to the joining region 10g of the multi-laminate region 10d, thereby preventing shininess. Furthermore, the frictional force at the adjacent surface 22 can be reduced, making it easier to remove the individual package 10 from the storage bag 21.

[0042] Additionally, in the individual package 10, the area of ​​the non-bonded region 10f is larger than the area of ​​the bonded region 10e in the multi-laminate region 10c (see FIG. 10). This increases the area of ​​the adjacent surface 22, increasing the number of first recessed portions 22a and first protruding portions 22b that relieve the compressive force, making it possible to further enhance the effects of suppressing shine and reducing frictional force.

[0043] [Regarding the second recess and second protrusion] In the individual packaging body 10, the packaging sheet 8 in the joining region 10g and the non-joining region 10h of the second surface 10b also has the recessed portions 8a and the protruding portions 8b (see FIG. 7) as described above. Hereinafter, as shown in FIG. 21, the recessed portions 8a in the joining region 10g and the non-joining region 10h of the adjacent surface 22 will be referred to as second recessed portions 23a, and the protruding portions 8b will be referred to as second protruding portions 23b.

[0044] The area of ​​the recess 23a is measured using an optical microscope (e.g., VHX-5000 manufactured by Keyence Corporation) under observation at 500x magnification using an area measurement tool included in the software accompanying the optical microscope (e.g., the area measurement tool included by default in the software for "VHX-5000" manufactured by Keyence Corporation).

[0045] The area of ​​the recess 23a is set to 50 μm from the viewpoint of achieving the effects of reducing the compression force and the amount of friction, which will be described later. 2 It is preferable that the thickness is 75 μm or more. 2 More preferably, it is 100 μm or more. 2 It is even more preferable that the thickness is 6000 μm or more. 2 Preferably, it is 5000 μm or less. 2 More preferably, it is 4000 μm or less. 2 It is even more preferable that the following is true: The shape of the recess 23a is not particularly limited, and may be any shape such as a polygonal shape such as a triangle, a rectangle, or a pentagon, or a circle, an ellipse, or a star.

[0046] As shown in Fig. 22, even on the multi-layer region 10d side, the packaging sheet 8 in the non-bonded region 10h is not fixed by the adhesive layer 6 and can move freely. Therefore, when a pair of compressive forces (arrow F in the figure) is applied, the second recessed portion 23a and the second protruding portion 23b preferentially move so as to extend in a direction perpendicular to the direction of the compressive force (arrow S in the figure), thereby reducing the pair of compressive forces. Furthermore, at the surface where the multi-layer region 10c and the multi-layer region 10d contact, only the first protruding portion 22b (see Fig. 17) and the second protruding portion 23b contact each other, thereby reducing frictional force.

[0047] [About the third convex part] In the individual packaging body 10, a larger convex portion may be provided in the packaging sheet 8 in the joining region 10g of the second surface 10b. As shown in Figures 23 and 24, a third convex portion 24 is provided in the joining region 10g. The third convex portion 24 is a convex portion having a larger area than the first concave portion 22a.

[0048] The area of ​​the third convex portion 24 is measured using an optical microscope (e.g., VHX-5000 manufactured by Keyence Corporation) under observation at 20x magnification using an area measurement tool included in the software accompanying the optical microscope (e.g., the area measurement tool included by default in the software for "VHX-5000" manufactured by Keyence Corporation).

[0049] The area of ​​the third protrusion 24 is set to 0.5 mm from the viewpoint of preventing the third protrusion 24 from entering the first recess 22a. 2 It is preferable that it is 1 mm or more. 2 More preferably, it is 2 mm or more. 2 It is even more preferable that the distance be 40 mm or more. 2 Preferably, it is less than 30 mm 2 It is more preferable that it is 20 mm or less. 2 It is even more preferable that the following is true: The shape of the third protrusion 24 is not particularly limited, and it can be any shape.

[0050] The third convex portions 24 are formed by placing a heated pressure-sensitive adhesive layer 6 on the packaging sheet 8 when producing the bonding sheet 9, and then placing the absorbent article 1 on top of that. The pressure-sensitive adhesive layer 6 is cooled and shrinks when it returns to room temperature, forming the third convex portions 24 on the packaging sheet 8. Therefore, the third convex portions 24 are formed in the bonding regions 10g where the pressure-sensitive adhesive layer 6 is bonded, and the third convex portions 24 are not formed in the non-bonding regions 10h.

[0051] By providing the third convex portion 24 in the joining region 10g, it becomes difficult for the third convex portion 24 to enter the first concave portion 22a as shown in Figure 25, and the adjacent surface 22 can be further reduced, thereby reducing the compressive force and making it possible to further increase the effects of suppressing shine and reducing frictional force.

[0052] [Variations] In the absorbent article 1 according to the present embodiment, as shown in Fig. 2, the adhesive layer 6 is formed on the non-skin-facing surface 1b of the backsheet 3, i.e., on the surface opposite to the absorbent body 4, but this is not limited to this. As shown in Fig. 26, a release sheet 32 ​​may be laminated on the non-skin-facing surface 1b with an adhesive layer 31 interposed therebetween, and the adhesive layer 6 may be formed on this release sheet 32. However, in this configuration, the thickness of the individual package 10 increases by the amount of the adhesive layer 31 and the release sheet 32, and the compressive force increases. For this reason, it is more preferable to form the adhesive layer 6 on the non-skin-facing surface 1b of the backsheet 3 as shown in Fig. 2, as this can suppress the compressive force.

[0053] The individual packaging body 10 according to the present embodiment is formed by folding the bonded sheet 9 in three as shown in Fig. 9, but is not limited to this and may be formed by folding it in four as shown in Fig. 27. In this case, the thinly laminated portion 12 is a portion where the number of laminated layers of the bonded sheet 9 is two, and the multi-laminated portion 13 is a portion where the number of laminated layers of the bonded sheet 9 is three or four. Even in this configuration, when the individual packaging body 10 is placed in the storage bag 21, the compressive force of the multi-laminated portion 13 is the greatest, but the above configuration makes it possible to suppress shine and reduce frictional force.

[0054] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and scope of the present invention. [Example]

[0055] A plurality of individual packages according to the above embodiment were produced and placed in a storage bag. A plurality of individual packages according to a comparative example were also produced and placed in a storage bag. The individual packages according to the comparative example had no irregularities on the packaging sheet. Table 1 below shows the differences in the configuration between the example and the comparative example, as well as the measurement results of the gloss and dynamic friction coefficient.

[0056] [Table 1]

[0057] Each individual package was removed from the storage bag, and the glossiness of the surface of the packaging sheet was measured. The measurement method used a glossiness measuring device ("RHOPOINT IQ" (product name) manufactured by Konica Minolta, Inc.) by placing the glossiness measuring device on the second surface of the individual package and measuring the glossiness at an incident angle of 85 degrees. This measurement was performed three times at different joining regions on the second surface of the individual package, and the average value was used as the glossiness value. The individual package according to the above embodiment had a glossiness of 2.1 (average of n=3), and the individual package according to the comparative example had a glossiness of 7.7 (average of n=3). Therefore, it can be said that the packaging sheet of the individual package according to the above embodiment suppresses the occurrence of shine.

[0058] The coefficient of dynamic friction between the surfaces of the packaging sheets of each individual package was also measured. The measurement method was a Tensilon testing machine (RTG-1310, manufactured by AND Company Limited). The packaging sheet removed from one individual package was fixed to the base of the testing machine with the surface corresponding to the second side of the individual package facing upward. A portion of the packaging sheet removed from another individual package was cut out, corresponding to the multi-layer region on the first side of the individual package, and attached to the flat surface of a rectangular parallelepiped metal plate weighing 202.95 g, 65 mm wide, 65 mm long, and 7 mm high (hereinafter referred to as the test piece).

[0059] The surface of the test specimen with the packaging sheet attached was placed on top of the packaging sheet fixed to the base. From this state, the test specimen was tied to the Tensilon testing machine with a string, and the test specimen was moved 50 mm from the starting point at a test speed of 200 mm / min. The coefficient of dynamic friction generated between the packaging sheet attached to the test specimen and the packaging sheet attached to the base was measured.

[0060] This measurement was performed five times using different samples, and the average value was used as the dynamic friction coefficient. The dynamic friction coefficient of the individual package according to the above embodiment was 0.4134 (average of n=5), while the dynamic friction coefficient of the individual package according to the comparative example was 0.4860 (average of n=5). Therefore, it can be said that the packaging sheet of the individual package according to the above embodiment has reduced frictional force. [Explanation of symbols]

[0061] 1...Absorbent articles 2...Surface sheet 3...Back sheet 4...Absorbent 6...Adhesive layer 8...Packaging sheet 9... Bonding sheet 10...Individual packaging 10c, 10d...Multi-layer area 10e, 10g…joining area 10f, 10f…non-bonded area 11...Tab tape 12…Small lamination part 13…Multi-layer part 20...Individually wrapped package 21...Storage bag 22...adjacent surface

Claims

1. An individual absorbent article package in which a plurality of individual absorbent article packages are contained in a storage bag, The absorbent article individual packaging body is formed by folding both end portions of a bonded sheet in the longitudinal direction of the absorbent article, the bonded sheet being formed by bonding an absorbent article and a packaging sheet via a plurality of spaced-apart adhesive layers, and has a first surface on which one of the end portions, that is, an opening end, is located, and a second surface opposite to the first surface, and is formed with a thinly stacked portion in which the number of layers of the bonded sheet is minimum, and a thinly stacked portion in which the number of layers of the bonded sheet is greater than the thinly stacked portion, and the absorbent article comprises a top sheet, a back sheet, and an absorbent body arranged between the top sheet and the back sheet, the first surface and the second surface each have a multi-laminate region that is a surface of the multi-laminate portion, and the multi-laminate region of the first surface includes the opening end; the multi-laminate region of the first surface and the second surface each includes a bonded region in which the pressure-sensitive adhesive layer is bonded to the packaging sheet, and a non-bonded region in which the pressure-sensitive adhesive layer is not bonded to the packaging sheet, The plurality of absorbent article individual packages are stored in the storage bag in a state aligned in a predetermined direction, and an adjacent surface is formed in which the joined region on the second surface of the absorbent article individual package and the non-joined region on the first surface of an adjacent absorbent article individual package are in contact with each other, and the packaging sheet in the non-joined region on the adjacent surface has a plurality of regularly arranged first recesses and first protrusions, and the first protrusions have a hollow structure. Individually wrapped absorbent article package.

2. The top sheet is positioned on the skin side of the user, The back sheet is a liquid-impermeable sheet, The adhesive layer is formed on the surface of the backsheet opposite to the absorbent body. The package of individual absorbent article wrappers according to claim 1.

3. In the multi-layer region on the first surface of the individual absorbent article package, the area of ​​the non-bonded region is larger than the area of ​​the bonded region. The package of individual absorbent article wrappers according to claim 1 or 2.

4. In the multi-layer region on the second surface of the absorbent article individual package, the bonded regions and the non-bonded regions are alternately arranged, and the packaging sheet in the non-bonded region on the second surface has a plurality of regularly arranged second recessed portions and second protruding portions, and the second protruding portions have a hollow structure. The package of individual absorbent article wrappers according to claim 1 or 2.

5. In the multi-layer region on the second surface of the absorbent article individual package, the packaging sheet in the joining region on the second surface has a plurality of third convex portions, and the third convex portions have an area larger than that of the first concave portions. The package of individual absorbent article wrappers according to claim 1 or 2.

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