Absorbent article packaging

Abstract

To provide a package of an absorbent article having an excellent opening property.SOLUTION: A package of an absorbent article comprises an absorbent article, a release sheet and a packaging sheet. The absorbent article comprises: a front surface sheet; a rear surface sheet; an absorber arranged between the front surface sheet and the rear surface sheet; and an adhesive part disposed on a non-skin side surface of the rear surface sheet, and has a longitudinal direction corresponding to a front-back direction of a wearer, a lateral direction orthogonal to the longitudinal direction, and a thickness direction orthogonal to the longitudinal direction and the lateral direction. The release sheet covers the adhesive part and is configured to be releasable from the adhesive part. The packaging sheet is fixed to the release sheet and packages the absorbent article. The absorber has a dent portion dent toward a front surface sheet side together with a rear surface sheet. An edge of the adhesive part is partially overlapped on the dent portion in a plane view viewed from the thickness direction of the absorbent article.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a package for absorbent articles in which absorbent articles are individually packaged. [Background technology]

[0002] As a packaging body for absorbent articles, a form using a release sheet is known, as described in Patent Document 1, for example. The release sheet is a sheet that covers an adhesive portion for fixing the absorbent article. The adhesive portion is provided on the non-skin-facing side of the absorbent article, and the release sheet is provided so as to cover the adhesive portion. In addition, the release sheet is bonded to the packaging sheet, and when the user peels off the packaging sheet, the release sheet is also peeled off at the same time. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-65568 Summary of the Invention [Problem to be solved by the invention]

[0004] In cases where it is difficult to peel the release sheet from the adhesive portion of the absorbent article package, it may be difficult to open the absorbent article package.

[0005] The present invention relates to a package for absorbent articles that is easy to open. [Means for solving the problem]

[0006] A package for an absorbent article according to one aspect of the present invention includes an absorbent article, a release sheet, and a packaging sheet. The absorbent article packaging body is a packaging body in which the absorbent article is packaged with the packaging sheet to which the release sheet is fixed. The absorbent article comprises a top sheet, a back sheet, an absorbent body disposed between the top sheet and the back sheet, and an adhesive portion provided on the non-skin-facing side of the back sheet. The adhesive portion is releasably covered with the release sheet. The absorbent body is recessed toward the topsheet side together with the backsheet, and has a recessed portion that partially overlaps with the edge of the adhesive portion in a plan view seen from the thickness direction. [Effects of the Invention]

[0007] The absorbent article packaging of the present invention can achieve excellent openability. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view of an absorbent article and its packaging body according to a first embodiment of the present invention, viewed from the skin side, showing the configuration of the packaging body before folding and after opening. FIG. [Figure 2] 2 is a plan view of the absorbent article and its packaging body shown in FIG. 1 as viewed from the non-skin side, showing the configuration of the absorbent article as seen through the release sheet and packaging sheet. FIG. [Figure 3] This is a plan view of the absorbent body of the absorbent article of the first embodiment, viewed from the non-skin side, and shows the side that is more ventral than the area that faces the wearer's excretory area when worn as the front, and the side that is more dorsal than the area that faces the excretory area as the rear. [Figure 4] FIG. 4 is a cross-sectional view of the absorbent article taken along line IV-IV in FIG. 2. [Figure 5] FIG. 3 is a cross-sectional view of the absorbent article taken along line VV in FIG. 2. [Figure 6] 1 is a plan view showing a folded configuration of a package of an absorbent article according to a first embodiment. [Figure 7] FIG. 7 is a cross-sectional view of the absorbent article taken along line VII-VII in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Overall composition of the napkin] As shown in Fig. 1, the absorbent article 1 of the first embodiment of the present invention comprises a main body M and a pair of wing portions W. The absorbent article 1 is configured as a sanitary napkin, and will hereinafter be referred to as napkin 1. The napkin 1 is configured so that it can be fixed to the wearer's clothing by an adhesive portion 15, which will be described later. The napkin 1 has a longitudinal direction X corresponding to the front-to-back direction of the 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 napkin 1 has a thickness direction Z perpendicular to both the longitudinal direction X and the lateral direction Y. The wearer side of the thickness direction Z may be referred to as the upper side of the thickness direction Z, and the opposite side of the thickness direction Z from the wearer may be referred to as the lower side of the thickness direction Z.

[0010] As shown in FIG. 1, the napkin 1 has a front region M1, a middle region M2, and a rear region M3, which are arranged in that order in the longitudinal direction. The middle region M2 is a region facing the wearer's excretory area when worn. In a sanitary napkin, the excretory area refers to the vaginal opening. The front region M1 is a region located more ventrally than the wearer's excretory area when worn. The rear region M3 is a region located more dorsally than the wearer's excretory area when worn.

[0011] The main body M extends along the longitudinal direction X and is fixed to the inner surface of the wearer's clothing when worn. The main body M has an absorbent body 10, which will be described later, and has the function of absorbing liquid excrement such as menstrual blood from the wearer. The pair of wing portions W are configured to face each other in the width direction with the main body M sandwiched therebetween in the intermediate region M2 and to protrude significantly outward in the width direction. When worn, the wing portions W are folded to face the main body M, sandwiching the underwear between them, and are fixed to the outer surface of the wearer's underwear. The wing portions W prevent the napkin 1 from shifting position while being worn, and prevent leakage of body waste outside the napkin 1. In a sanitary napkin equipped with wing portions W, it is desirable that the region in the vertical direction X sandwiched between the front and rear base portions of the wing portions W be the middle region M2.

[0012] 1, 2, 4, and 5, the napkin 1 comprises an absorbent body 10, a topsheet 12, a backsheet 13, a pair of side sheets 14, and an adhesive portion 15. In the main body M, the napkin 1 has a configuration in which the backsheet 13, the absorbent body 10, and the topsheet 12 are laminated in the thickness direction Z. These components are appropriately joined and integrated, for example, by bonding with an adhesive or heat sealing, or by compressing using the leak-proof grooves 4 described below. Hereinafter, for each component constituting the napkin 1, the surface facing the wearer's skin will be referred to as the skin side, and the surface opposite to the surface facing the wearer's skin will be referred to as the non-skin side.

[0013] The absorbent body 10 extends along the longitudinal direction X and is disposed between the topsheet 12 and the backsheet 13. The absorbent body 10 absorbs bodily waste from the surface facing the topsheet 12, and diffuses and retains the bodily waste inside. The configuration of the absorbent body 10 will be described later.

[0014] The topsheet 12 is configured as a liquid-permeable sheet material, and is disposed above the absorbent body 10 in the thickness direction Z. As shown in Figure 4, the topsheet 12 has, for example, multiple protrusions 12a that protrude upward. The protrusions 12a may be solid with fibers distributed inside, or hollow with almost no fibers inside. The protrusions 12a reduce the contact area between the wearer's skin and the topsheet 12 when worn, improving breathability and reducing discomfort.

[0015] The backsheet 13 is disposed below the absorbent body 10 in the thickness direction Z. The backsheet 13 is joined to the topsheet 12 and the sidesheets 14, for example, at the peripheral edges thereof by adhesive, heat sealing or the like. The back sheet 13 is formed of a sheet material having properties such as low liquid permeability, water vapor permeability, and water repellency. Examples of the sheet material that can be used include a thermoplastic resin film and a laminate of such a film and nonwoven fabric.

[0016] The pair of side sheets 14 are arranged on the periphery of the napkin 1 in the transverse direction Y, and face each other in the transverse direction Y with the topsheet 12 sandwiched therebetween. The side sheets 14 are joined to the topsheet 12 on the inner side in the transverse direction Y with an adhesive or the like. The material of the side sheets 14 is preferably a sheet material that is less hydrophilic than the topsheet 12, and specific examples include nonwoven fabrics, film materials, and sheets with a laminate structure of nonwoven fabrics and film materials that are less hydrophilic than the topsheet.

[0017] The adhesive portion 15 is provided on the non-skin side of the backsheet 13 and functions as a slip-preventing material to secure the napkin 1 to clothing. Here, the non-skin side of the backsheet 13 refers to the side of the backsheet 13 opposite to the side facing the absorbent body 10, that is, the side that comes into contact with the wearer's clothing. The adhesive portion 15 is formed, for example, by applying an adhesive in a predetermined pattern to the back sheet 13. The adhesive used for the adhesive portion 15 is preferably a hot melt adhesive such as a rubber-based, olefin-based, or ethylene vinyl acetate (EVA)-based adhesive. In this embodiment, the adhesive portion 15 is provided on the back sheet 13 of the main body M and the wing portion W. The configuration of the adhesive portion 15 will be described later.

[0018] [Absorber structure] 3, the absorbent body 10 has a front end 10a and a rear end 10b, and extends from the front end 10a to the rear end 10b in the longitudinal direction X. The front end 10a is located in a front region M1, and the rear end 10b is located in a rear region M3. 4 and 5, the absorbent body 10 is disposed between a top sheet 12 and a back sheet 13. The absorbent body 10 is bonded on its skin side to the top sheet 12 with an adhesive (not shown) such as a hot melt adhesive. The absorbent body 10 has an absorbent core 2 , a core wrap sheet 3 , a leak-proof groove 4 , a recessed portion 5 , and a high-rigidity portion 6 .

[0019] (Absorbent core configuration) The absorbent core 2 is a longitudinal member extending along the longitudinal direction, and is configured to be able to absorb and retain bodily exudates. The absorbent core 2 has a skin-facing surface 20a located on the wearer's skin side and a non-skin-facing surface 20b located on the wearer's clothing side. The absorbent core 2 also has a front edge 2a and a rear edge 2b in the longitudinal direction X. The front and rear edges 2a, 2b of the absorbent core 2 are curved so as to bulge outward in the longitudinal direction X.

[0020] The absorbent core 2 is a fiber assembly formed by stacking fiber materials such as pulp, and can be manufactured using a fiber stacking device. Hydrophilic fibers are mainly used as the fiber material constituting the absorbent core 2. Examples of hydrophilic fibers include inherently hydrophobic fibers that have been hydrophilized, such as chemical fibers, and inherently hydrophilic fibers, such as wood pulp. These fibers can be used alone or in combination of two or more. Furthermore, the absorbent core 2 may further contain a water-absorbent polymer in addition to the fibrous material. This can increase the liquid retention capacity of the absorbent core 2. The water-absorbent polymer may generally be spherical, blocky, bale-shaped, or irregular. Any water-absorbent polymer that can be used in this type of absorbent article can be used without any particular limitation, and for example, a polymer or copolymer of acrylic acid or an alkali metal acrylate can be used.

[0021] In this embodiment, the absorbent core 2 has a high basis weight portion 21 and a low basis weight portion 22. The high basis weight portion 21 is an area where the basis weight of the contents of the absorbent core 2, such as fiber materials and water-absorbent polymers, is higher than that of the low basis weight portion 22. The high basis weight portion 21 is formed as a longitudinal region extending in the longitudinal direction X in the intermediate region M2, located in the central portion 31 in the lateral direction Y of the absorbent body 10. The front and rear edge portions of the high basis weight portion 21 are configured, for example, in a curved shape that convexly curves in the longitudinal direction X. The low basis weight portion 22 is a region of the absorbent core 2 other than the high basis weight portion 21. In this embodiment, the high basis weight portion 21 is provided so as to protrude toward the topsheet 12 side relative to the low basis weight portion 22. The high basis weight portion 21 may also be configured so as to protrude toward the backsheet 13 side. By providing the high basis weight portion 21 in the central portion 31 in the lateral direction Y of the middle portion of the absorbent core 2, it is possible to improve the fit of the middle portion to the excretory portion and the absorbency of body fluids.

[0022] (Core wrap sheet configuration) The core wrap sheet 3 covers the absorbent core 2. The core wrap sheet 3 may be positioned so as to cover at least the skin-facing surface 20a of the absorbent core 2. As shown in Fig. 4, in this embodiment, one core wrap sheet 3 covers the entire absorbent core 2, and the core wrap sheet 3 covers both the skin-facing surface 20a and the non-skin-facing surface 20b. The core wrap sheet 3 also has a front edge 3a and a rear edge 3b in the longitudinal direction X. As shown in Fig. 3, in this embodiment, the core wrap sheet 3 is configured to have the same shape as the absorbent core 2 in a planar view. Therefore, the front and rear edges 3a, 3b of the core wrap sheet 3 overlap the front and rear edges 2a, 2b of the absorbent core 2 in a planar view. The front and rear end edges 3a, 3b of the core wrap sheet may protrude outward in the longitudinal direction X beyond the front and rear end edges 2a, 2b of the absorbent core 2.

[0023] The absorbent body 10 also has a multilayer region 25 of the core wrap sheet 3. The multilayer region 25 is a region where the end portions of the core wrap sheet 3 covering the absorbent core 2 overlap on the side facing the backsheet 13 of the absorbent body 10 (the non-skin-facing surface 20b side of the absorbent core 2). The core wrap sheet 3 is, for example, a rectangular sheet, and is arranged so that when it covers the absorbent core 2, a pair of opposing ends overlap each other and are located on the non-skin-facing surface 20b side. Therefore, as shown in Figure 4, a multilayer region 25 where two core wrap sheets 3 overlap is formed on the non-skin-facing surface 20b side of the absorbent core 2. The multilayer region 25 extends in the longitudinal direction X and is located in the central portion 31 of the absorbent body 10 in the transverse direction Y. The multilayer region 25 is also included in the region that will become the high stiffness portion 6 described below. Although the example in which the multilayer region 25 is located on the skin-facing surface 20a side has been given here, it may also be located on the non-skin-facing surface 20b side. Also, the multilayer region 25 is not shown in Figure 3.

[0024] The core wrap sheet 3 is typically a sheet-like material such as a nonwoven fabric or paper primarily composed of hydrophilic fibers. Examples of hydrophilic fibers contained in the core wrap sheet 3 include natural fibers such as wood pulp (e.g., softwood pulp, hardwood pulp) and non-wood pulp (e.g., cotton pulp, hemp pulp), modified pulp (e.g., cationized pulp, mercerized pulp), regenerated fibers (e.g., cupra, rayon), semi-synthetic fibers (e.g., acetate), hydrophilic synthetic fibers (e.g., polyvinyl alcohol fiber, polyacrylonitrile fiber), and synthetic fibers (e.g., polyethylene terephthalate fiber, polyethylene fiber, polypropylene fiber, polyester fiber) that have been hydrophilized. These fibers can be used alone or in combination. Typical hydrophilic fibers in the core wrap sheet 3 are natural fibers, cellulose-based regenerated fibers, or semi-synthetic fibers. In addition to the hydrophilic fibers, the core wrap sheet 3 may also contain synthetic fibers (hydrophobic fibers), such as thermoplastic fibers. As the thermoplastic fiber, for example, a single fiber formed using a single synthetic resin such as polyethylene, polypropylene, polyester, polyurethane, or a composite fiber formed using a synthetic resin such as a composite of two or more of these, for example, a core-sheath type or a side-by-side type composite fiber formed using two or more synthetic resins, can also be used.

[0025] (Leak-proof groove configuration) The absorbent body 10 and the topsheet 12 are provided with leak-proof grooves 4 formed by compressing from the topsheet 12 side in the thickness direction Z. The leak-proof grooves 4 are configured such that the topsheet 12 and the absorbent core 2 are integrally recessed toward the backsheet 13 side. 1 and 3, the leakage prevention grooves 4 are compressed grooves formed on the periphery of the main body M, extending from the front region M1 to the rear region M3, and are arranged so as to surround the central portion 31 in the lateral direction Y of the absorbent body 10. Furthermore, as shown in Fig. 2, the leakage prevention grooves 4 at least partially overlap with the main body adhesive portion 15M in plan view.

[0026] 1, the leakage preventing grooves 4 are positioned along the periphery of the absorbent body 10 so as to surround the high basis weight portion 21. The leakage preventing grooves 4 also include a pair of vertical leakage preventing grooves 4a, 4a extending in the longitudinal direction X through the front region M1, the middle region M2, and the rear region M3, and a pair of horizontal leakage preventing grooves 4b, 4b extending in the transverse direction Y. The vertical leakage preventing grooves 4a and the horizontal leakage preventing grooves 4b are connected to form a substantially oval shape.

[0027] The leak-proof grooves 4 can be formed in accordance with a conventional method, such as by compressing with or without heat, or by embossing such as ultrasonic embossing. In the leak-proof grooves 4, the topsheet 12 and the absorbent body 10 are integrated together by heat fusion or the like. In other words, the leakage prevention grooves 4 are more compacted than the surrounding areas. As a result, the leakage prevention grooves 4 draw bodily fluids between the compacted fibers by capillary action and diffuse the fluid in the longitudinal direction X, which is the extension direction, thereby preventing fluid leakage in the transverse direction Y. By providing the leakage prevention grooves 4 in this way, it is possible to ensure a dry feeling around the wearer's excretory area while also ensuring leakage prevention.

[0028] By providing the pair of leakage preventing vertical grooves 4a, 4a, when an external force is applied from the wearer's legs inward in the lateral direction Y, the absorber 10 is more likely to deform around the pair of leakage preventing vertical grooves 4a, 4a as base points. This makes it easier to secure the area sandwiched between the pair of leakage preventing vertical grooves 4a, 4a as an absorption surface for absorbing bodily fluids.

[0029] (Configuration of the recessed portion) The recessed portion 5 is an area recessed toward the topsheet 12 side together with the backsheet 13 . In this embodiment, the recessed portion 5 is provided so as to include a part of the edge of the absorbent body 10 . The depression 5 is configured so that at least the non-skin-facing surface 20b facing the backsheet 13 is recessed toward the topsheet 12. The backsheet 13 is also arranged to follow the recessed shape of the depression 5. Therefore, the depression 5 is an area where the backsheet 13 is partially recessed so as to include the edge of the absorbent body 10.

[0030] In this embodiment, the depressions 5 are formed as compressed regions by compressing the absorbent body 10 in the thickness direction Z. The compressed regions are formed by compressing the absorbent core 2 and the core wrap sheet 3 together, and are thinned regions whose thickness has been reduced by compression. Hereinafter, they will be referred to as compressed regions 5 using the same reference numerals as the depressions 5. As shown in Fig. 3, the absorbent body 10 has a front compressed region 5a and a rear compressed region 5b formed at the front end 10a and the rear end 10b, respectively, as compressed regions 5. Figs. 4 and 5 show a schematic example of the cross-sectional configuration of the front compressed region 5a, but the cross-sectional configuration of the rear compressed region 5b is also similar to the configuration shown in Figs. 5, when the absorbent core 2 and the core wrap sheet 3 are compressed, a boundary portion where the thickness of the absorbent body 10 gradually decreases may be formed between the uncompressed region and the region where the thickness has become constant due to compression. Such a boundary portion where the thickness changes due to compression is also included in the compressed region 5.

[0031] The front compressed region 5a and the rear compressed region 5b are located in the central portion 31 in the lateral direction Y of the absorbent body 10, and are located more inward in the lateral direction Y than the side edges in the lateral direction Y of the absorbent body 10. The front compressed region 5a and the rear compressed region 5b are located only in the front region M1 and the rear region M3, respectively. Both the front compressed region 5a and the rear compressed region 5b are formed by compressing the entire absorbent body 10 in the thickness direction Z, in which the absorbent core 2 is covered with the core wrap sheet 3. In the front compressed region 5a and the rear compressed region 5b, the absorbent core 2 and the core wrap sheet 3 are integrated. The front compressed region 5a and the rear compressed region 5b are more rigid than other regions that have not been compressed, and are therefore less likely to deform.

[0032] The front compressed region 5a is made up of a plurality of compressed grooves 26a that extend in the longitudinal direction X and are spaced apart from one another. The rear compressed region 5b is made up of a plurality of compressed grooves 26b that extend in the longitudinal direction X and are spaced apart from one another. The compressed grooves 26a and 26b are formed by recessing only the absorbent core 2 and core wrap sheet 3 of the absorbent body 10 together, and the topsheet 12 is not compressed.

[0033] In the front compressed region 5a and the rear compressed region 5b, both the skin-facing surface 20a side and the non-skin-facing surface 20b side are compressed along the thickness direction Z. Therefore, the front compressed region 5a and the rear compressed region 5b are recessed regions relative to the uncompressed regions whether viewed from the topsheet 12 side or the backsheet 13 side, and form a step that connects to the edge of the absorbent body 10. 4 and 5, in the front compressed region 5a and the rear compressed region 5b, the topsheet 12 and the backsheet 13 are arranged along the steps formed by compression. Therefore, steps are formed on the skin side of the topsheet 12 and the non-skin side of the backsheet 13 corresponding to the front compressed region 5a and the rear compressed region 5b, respectively.

[0034] In the napkin 1, the absorbent core 2 and the core wrap sheet 3 have the same shape in a plan view, so the front compressed region 5a and the rear compressed region 5b extend to the front and rear edges 3a, 3b of the core wrap sheet 3, respectively. However, if the front and rear edges 3a, 3b of the core wrap sheet 3 extend further in the front and rear end directions of the napkin 1 than the front and rear edges 2a, 2b of the absorbent core 2, respectively, the front compressed region 5a and the rear compressed region 5b only need to extend to the front edge 2a and rear edge 2b of the absorbent core 2, respectively, and do not need to extend to the front and rear edges 3a, 3b of the core wrap sheet 3.

[0035] The compressed grooves 26a and 26b are linear grooves extending in the longitudinal direction X, and each extend from a side edge in the longitudinal direction X toward the middle region M2. The "linear" shape of the compressed grooves 26a and 26b does not necessarily mean that the shape of the grooves is linear in plan view, but also includes curved shapes. Each line in the compressed grooves 26a and 26b may be a continuous line or a broken line. For example, the compressed grooves 26a and 26b may be formed as a row of a large number of discontinuous depressions (e.g., dot embossments). In addition, in this embodiment, the compressed grooves are linear grooves extending in the vertical direction X, but the shape of the compressed grooves is not limited to this. They may also be linear grooves extending in the horizontal direction Y. Furthermore, the compressed region may be formed by arranging dot-like compressed grooves in a matrix pattern. In this embodiment, the front compression zone 5a (rear compression zone 5b) has a compressed portion such as the compression grooves 26a (compression grooves 26b) and an uncompressed portion located between adjacent compression grooves 26a (compression grooves 26b). In this way, the front compression zone 5a (rear compression zone 5b) may have an uncompressed portion, or may be composed only of a compressed portion.

[0036] (Configuration of high rigidity part) The high stiffness portion 6 is a region that has higher stiffness than other regions of the absorbent body 10. The portion of the absorbent body 10 where the high stiffness portion 6 is provided has higher stiffness than the portion where the high stiffness portion 6 is not provided. For example, the high stiffness portions 6 are arranged so as to partially overlap with the high basis weight portions 21, the leakage prevention grooves 4, and the compressed regions 5, but in each of the high basis weight portions 21, the leakage prevention grooves 4, and the compressed regions 5, the portions overlapping with the high stiffness portions 6 have a higher stiffness than the portions not overlapping with the high stiffness portions 6. In this way, the high stiffness portions 6 can also be said to be regions in the absorbent body 10 where stiffness is reinforced. By providing the high-rigidity portion 6, it is possible to prevent the napkin 1 from being easily deformed when the package 30 of the napkin 1 is opened.

[0037] 3, the high stiffness portion 6 is provided along the longitudinal direction X in the central portion 31 in the transverse direction Y of the absorbent body 10. This makes it difficult for the napkin 1 to bend in the longitudinal direction X. Here, the high stiffness portion 6 is configured as a rectangular region extending along the longitudinal direction X, and is arranged symmetrically with respect to the center line 33 in the transverse direction Y. The front and rear edges of the high stiffness portion 6 extend to the front and rear edges of the absorbent body 10. Therefore, the front edge of the high stiffness portion 6 coincides with the front edge 2a (front edge 3a) of the absorbent core 2 (core wrap sheet 3), and the rear edge of the high stiffness portion 6 coincides with the rear edge 2b (rear edge 3b) of the absorbent core 2 (core wrap sheet 3). In this way, by forming the high-rigidity portions 6 over both end edges of the absorbent body 10 in the longitudinal direction X, the ends of the absorbent body 10 become less likely to bend.

[0038] In the napkin 1, the high stiffness portion 6 is formed by an adhesive applied to the absorbent body 10. For example, when the absorbent body 10 is bonded using a hot melt adhesive or the like, the molten adhesive is impregnated into the absorbent core 2 and the core wrap sheet 3. When the adhesive hardens, a hardened product is formed that includes the absorbent core 2 and the core wrap sheet 3 with the adhesive as the base material. The hardened adhesive portion has higher rigidity than other portions where no adhesive is applied. In this way, the property of increasing rigidity at the location where adhesive is applied is utilized to form the high-rigidity portion 6. This eliminates the need to introduce new dedicated members, etc., and makes it possible to form the high-rigidity portion 6 easily and at low cost.

[0039] In this embodiment, the high stiffness portion 6 is configured using an adhesive that seals the core wrap sheet 3. Therefore, the high stiffness portion 6 includes an area where an adhesive is disposed that seals the core wrap sheet 3 that covers the absorbent core 2. Here, the adhesive that seals the core wrap sheet 3 is an adhesive that fastens the core wrap sheet 3 so that the state in which the absorbent core 2 is wrapped by the core wrap sheet 3 does not collapse.

[0040] As described above, the absorbent body 10 has a multilayer region 25 formed by overlapping both end portions of the core wrap sheet 3. The adhesive that seals the core wrap sheet 3 is an adhesive that bonds the ends of the overlapping core wrap sheets 3 together in this multilayer region 25. In the multilayer region 25, the double core wrap sheet 3 is bonded together to form the high rigidity portion 6. This allows a cured product to be formed with the adhesive in the thicker portion of the core wrap sheet 3, making it possible to sufficiently increase the rigidity of the high rigidity portion 6.

[0041] The length in the lateral direction Y of the high rigidity portion 6 is set to be larger than the length in the lateral direction Y of, for example, the multilayer region 25. In this case, in the region of the high rigidity portion 6 outside the multilayer region 25, the high rigidity portion 6 is formed by a cured product in which the adhesive is impregnated into the single-layer core wrap sheet 3. In this way, even outside the multilayer region 25, the high rigidity portion 6 can be formed using an adhesive. Additionally, the shape and size of the high rigidity portion 6 are not limited. For example, the high rigidity portion 6 may be a region of the same shape and size as the multilayer region 25. Alternatively, the high rigidity portion 6 may be formed by applying an adhesive to a portion of the multilayer region 25. In this way, the high rigidity portion 6 includes at least a portion of the multilayer region 25 of the core wrap sheet 3. It should be noted that the multilayer region 25 does not necessarily have to be bonded. Even in such a case, the multilayer region 25 in which the core wrap sheet 3 is arranged in layers has higher rigidity than other regions and can be used as the high rigidity portion 6.

[0042] The absorbent core 2 and the core wrap sheet 3 may also be bonded together with an adhesive. In this case, the high stiffness portion 6 is formed by the adhesive that bonds the absorbent core 2 and the core wrap sheet 3. For example, an adhesive is placed between the non-skin-facing surface 20b of the absorbent core 2 and the core wrap sheet 3, and the absorbent core 2 and the core wrap sheet 3 are bonded together on the back sheet 13 side. The amount of adhesive applied is set to an amount that will not cause separation between the absorbent core 2 and the core wrap sheet 3. This prevents the core wrap sheet 3 from floating away from the absorbent core 2.

[0043] Furthermore, the absorbent core 2 may be bonded to the back sheet 13 with an adhesive via the core wrap sheet 3. In this case, the high stiffness portion 6 can be said to be a region where the stiffness is increased by integrally bonding the absorbent core 2, the core wrap sheet 3, and the back sheet 13. For example, the absorbent core 2 and the core wrap sheet 3 are bonded together with an adhesive such as a hot melt adhesive. Then, adhesive is placed between the core wrap sheet 3 and the back sheet 13, and the absorbent core 2 and the back sheet 13 are bonded together via the core wrap sheet 3. It is also possible to bond the absorbent core 2, the core wrap sheet 3, and the back sheet 13 all at once, without dividing the bonding process into two steps. The amount of adhesive applied is set to an amount that will not cause the absorbent core 2 to peel off from the backsheet 13. This prevents the absorbent core 2 from floating away from the backsheet 13.

[0044] (Adhesive part configuration) 2, the adhesive portion 15 has an adhesive portion for the main body 15M and adhesive portions for the wings 15W. The adhesive portion for the main body 15M is a slip-preventing material that secures the main body M of the napkin 1 to clothing, and is provided on the outer surface of the back sheet 13 that constitutes the main body M. The adhesive portions for the wings 15W are slip-preventing material that secures the pair of wing portions W to clothing, and are provided on the outer surface of the back sheet 13 that constitutes the pair of wing portions W.

[0045] In the napkin 1, two adhesive portions for the main body 15M, 15M are provided on the backsheet 13 of the main body M. The two adhesive portions for the main body 15M, 15M each extend in the longitudinal direction X and are spaced apart from each other in the transverse direction Y. Neither of the two adhesive portions for the main body 15M, 15M is located on the center line 33 of the absorbent body 10, but are arranged opposite each other in the transverse direction Y with the center line 33 interposed therebetween. When the napkin 1 is worn, the main body M is fixed to the inner surface of the garment, which faces the skin, by the two main body adhesive portions 15M, 15M. In the state of the package 10, the two main body adhesive portions 15M, 15M are releasably covered by a release sheet 17, which will be described later.

[0046] The edge 27 of each main body adhesive portion 15M is arranged so as to partially overlap with the front compressed region 5a and the rear compressed region 5b. Hereinafter, the front and rear edges 27 of the main body adhesive portion 15M in the longitudinal direction X will be referred to as the front edge 27a and the rear edge 27b. For example, the front edge 27a of each main body adhesive portion 15M is set inward from the front edge of the absorbent body 10 and at a position overlapping with the front compressed region 5a. The rear edge 27b of each main body adhesive portion 15M is set inward from the rear edge of the absorbent body 10 and at a position overlapping with the rear compressed region 5b. Therefore, the main body adhesive portion 15M overlaps with the front compressed region 5a and the rear compressed region 5b in a plan view. The spacing between the main body adhesive portions 15M in the lateral direction Y is set to be smaller than the length of the high rigidity portion 6 in the lateral direction Y. Therefore, the area of ​​each main body adhesive portion 15M on the center line 33 side overlaps with the high rigidity portion 6 in a plan view.

[0047] Furthermore, in the napkin 1, two adhesive portions for wings 15W, 15W are provided on the backsheet 13 of each of the pair of wing portions W. The adhesive portions for wings 15W, 15W are configured to fit within the wing portions W without protruding beyond the main body M. When the napkin 1 is worn, the wing portions W located in the middle region M2 are folded so as to contact the outer surface of the garment, which is the non-skin side, and are fixed to the outer surface of the garment by the wing adhesive portions 15W.

[0048] [Packaging composition] As shown in Figures 1, 2, 4 and 5, the package 30 comprises the above-mentioned napkin 1, a release sheet 16, a packaging sheet 17 and a joint 18. The package 30 is formed by folding the napkin 1 together with the release sheet 16 and packaging sheet 17 in the longitudinal direction X along two fold lines L1 and L2 (see Figure 1) extending in the transverse direction Y, and individually packaging them as shown in Figures 6 and 7 described below. In the package 30, the release sheet 16 is fixed to the packaging sheet 17 by the joint 18. In this way, the package 30 is formed by packaging the napkin 1 in the packaging sheet 17 to which the release sheet 16 is fixed. 1 shows the package 30 in a state in which the napkin 1 is stretched out on the XY plane before folding and after opening. Also, Fig. 2 shows the non-skin side of the backsheet 13 visible through the packaging sheet 17 and the release sheet 16. Here, the packaging sheet 17 is shown as the area surrounded by a rough dashed line, and the release sheet 16 is shown as the area surrounded by a dashed line.

[0049] The release sheet 16 covers the adhesive portion 15M for the main body of the napkin 1 and is configured to be releasable from the adhesive portion 15M for the main body. The release sheet 16 is configured as, for example, a rectangular sheet material having a longitudinal direction in the vertical direction X. As shown in Fig. 2, the lengths of the release sheet 16 in the vertical direction X and the horizontal direction Y are set so that it can cover the entire surfaces of the two main body adhesive portions 15M, 15M. In other words, each main body adhesive portion 15M is completely covered by using one release sheet 16. The release sheet 16 can be made of a sheet material that can be easily peeled off from the adhesive portion 15 of the napkin 1. Examples of such sheet materials include glassine paper, polyethylene film, and release-treated wood-free paper.

[0050] The packaging sheet 17 is a sheet material that forms the outer surface of the packaging body 30, and is fixed to the release sheet 16 to package the napkin 1. The packaging sheet 17 is placed on the opposite side of the release sheet 16 from the back sheet 13. In the example shown in Figures 1 and 2, a rectangular packaging sheet 17 is used that is larger than the main body M of the napkin 1 in a plan view seen from the thickness direction Z and is long in the vertical direction X. As the packaging sheet 17, various materials conventionally used as packaging materials for absorbent articles can be used without any particular limitation, and for example, resin film, nonwoven fabric, paper, etc. can be used.

[0051] The joint 18 joins the release sheet 16 and the packaging sheet 17. An adhesive is typically used as the joint 18, but an adhesive seal or the like may also be used. In this embodiment, a front joint 18a is provided on the front edge (front compressed region 5a) side of the release sheet 16, and a rear joint 18b is provided on the rear edge (rear compressed region 5b) side of the release sheet 16. The front joint 18a (rear joint 18b) is a rectangular region that is symmetrical with respect to the center line 33 and that overlaps with the front compressed region 5a (rear compressed region 5b) on the side of the middle region M2. The length in the lateral direction Y of the front joint 18a (rear joint 18b) is set to be greater than the lateral length of the high rigidity portion 6 and smaller than the lateral length of the front compressed region 5a (rear compressed region 5b).

[0052] By fixing the release sheet 16 and the packaging sheet 17 using the joint 18, when opening the packaging body 30, the packaging sheet 17 and the release sheet 16 can be peeled off together from the packaging body 30. As a result, the back sheet 13 including the adhesive portion 15 of the napkin 1 is exposed, and the user of the napkin 1 can fix the back sheet 13 to clothing via the adhesive portion 15. Furthermore, the peeled packaging sheet 17 and release sheet 16 can also be used, for example, to wrap used napkins 1 for disposal.

[0053] (Folding structure of packaging body) 1, the laminate of the napkin 1, the release sheet 16, and the packaging sheet 17 has a first fold line L1 located on the front side of the napkin 1 and a second fold line L2 located on the rear side of the napkin 1. More specifically, the first fold line L1 is located in front of the wing portions W (toward the wearer's abdomen). The second fold line L2 is located behind the wing portions W (toward the wearer's back). The first fold line L1 and the second fold line L2 are imaginary lines that serve as folding axes when folding the napkin 1 into the packaging body 30.

[0054] The packaging body 30 is divided into three regions, the front region M1, the middle region M2, and the rear region M3, by the first folding line L1 and the second folding line L2. The middle region M2 is the region between the first fold line L1 and the second fold line L2. The front region M1 is a region in front of the first fold line L1. The rear region M3 is a region behind the second fold line L2.

[0055] 6 and 7, the napkin 1 is folded so that the topsheet 12 in the front region M1 overlaps the packaging sheet 17 in the rear region M3. The folding structure of the packaging body 30 will be described in detail below. First, from the state shown in Fig. 1, the rear region M3 is folded onto the middle region M2 with the second fold line L2 as the folding axis. Specifically, the topsheet 12 of the rear region M3 is placed on the topsheet 12 of the middle region M2. Note that the wing portions W may be folded inward in the lateral direction Y beforehand. At this time, the wing adhesive portions 15W provided on the wing portions W are protected by a release sheet (not shown). Next, the front region M1 is folded over the middle region M2 and the rear region M3 with the first fold line L1 as the folding axis. Specifically, the topsheet 12 of the front region M1 is placed on the outer surface of the packaging sheet 17 of the rear region M3. As a result, the napkin 1 is folded in thirds in the longitudinal direction X, and the packaging body 30 shown in Figures 6 and 7 is formed.

[0056] Furthermore, the package 30 may have a tab tape T and a side seal F as components for maintaining the folded structure. As shown in FIGS. 1, 6 and 7, the tab tape T is fixed to the end of the front region M1 of the packaging body 30, and seals the end and the packaging sheet 17 in the rear region M3. As shown in FIG. 6, the side sealing portions F are formed on the side edges of the packaging sheet 17 extending outward in the lateral direction Y from the napkin 1, and are joined by a known joining method such as heat embossing.

[0057] (Positional relationship of the adhesive part for the main body, the compressed area, the joint part, and the high-rigidity part) The following mainly focuses on the positional relationship between the adhesive portion for the main body 15M, the compressed region 5 (front compressed region 5a), the joining portion 18 (front joining portion 18a), and the high stiffness portion 6 on the front side of the napkin 1. The following explanation can be interpreted as an explanation of the positional relationship between the main body adhesive portion 15M, the compressed area 5 (rear compressed area 5b), the joint portion 18 (rear joint portion 18b), and the high rigidity portion 6 on the rear side of the napkin 1, as appropriate.

[0058] First, the arrangement of the front compressed region 5a and the adhesive portion for the main body 15M will be described. 2, a front compressed region 5a is arranged at the front end 10a of the absorbent body 10 on the front side of the napkin 1. This front compressed region 5a overlaps with part of the front edges 27a of the two main body adhesive regions 15M, 15M. In this way, the front compressed region 5a partially overlaps with the edge 27 of the main body adhesive region 15M in a plan view seen in the thickness direction Z of the napkin 1.

[0059] 4 and 5, in the front compressed region 5a, the backsheet 13 is arranged along the compressed shape, and the backsheet 13 is recessed toward the topsheet 12. Therefore, of the two adhesive portions 15M, 15M for the main body provided on the non-skin side of the backsheet 13, in the region that overlaps with the front compressed region 5a in a plan view, the two adhesive portions 15M, 15M for the main body are recessed relative to the surrounding region. Furthermore, in the package 30, the release sheet 16 is provided so as to entirely cover the two main body adhesive portions 15M, 15M. Of these, the release sheet 16 is in contact with the main body adhesive portion 15M in areas other than the front compressed region 5a (and the rear compressed region 5b). On the other hand, in areas where the main body adhesive portion 15M and the front compressed region 5a (and the rear compressed region 5b) overlap, the main body adhesive portion 15M is recessed, so the release sheet 16 is not in contact with the main body adhesive portion 15M and is in a floating state.

[0060] Generally, sanitary napkins have an adhesive on the non-skin side for attaching the sanitary napkin to clothing. Sanitary napkins can be packaged in a way that the adhesive is covered with a release sheet to protect it, and the release sheet is then attached to the packaging sheet. In this way, when using the sanitary napkin, the release sheet can be peeled off from the sanitary napkin along with the packaging sheet by pinching the front ends of the packaging sheet and the sanitary napkin and pulling them in opposite directions. In this case, if the adhesive strength between the adhesive and the release sheet is high, the back sheet may stretch, making it difficult to open the package.

[0061] In this embodiment, by configuring the napkin 1 to have the above-mentioned positional relationship, a space (hereinafter referred to as a non-contact space 35) where the release sheet 16 and the adhesive portion for the main body 15M are not in contact with each other is formed in the front compressed region 5a. The edge 27 of the adhesive portion for the main body 15M overlaps this non-contact space 35 in a plan view. The edge 27 of the adhesive portion for main body 15M is the position where peeling begins when peeling the release sheet 16 from the adhesive portion for main body 15M, for example. The configuration in which the front compressed region 5a partially overlaps the edge 27 of the adhesive portion for main body 15M to form the non-contact space 35 can be said to be a configuration in which a portion where the release sheet 16 and the adhesive portion for main body 15M are not in contact is provided at the position where peeling of the release sheet 16 begins. This makes it easier to start peeling off the release sheet 16 than, for example, when starting to peel off from the part where the release sheet 16 and the main body adhesive portion 15M are in close contact, thereby realizing an easy-to-open package 30. Furthermore, even when the adhesive strength between the main body adhesive portion 15M and the release sheet 16 is high, the release sheet 16 can be easily peeled off without unnecessarily deforming the back sheet 13.

[0062] The non-contact space 35 is formed at the front end 10a of the absorbent body 10. Therefore, for example, when a wearer slips their fingers between the release sheet 16 and the napkin 1 (back sheet 13), the wearer's fingers can easily reach the front end 10a of the absorbent body 10, making it easier for the wearer to grasp the absorbent body 10. This makes it possible to peel off the release sheet 16 while grasping the portion of the napkin 1 where the absorbent body 10 is provided. As a result, it is easier to grasp the napkin 1 than, for example, grasping the peripheral portion of the absorbent body 10 which is composed only of the top sheet 12 and back sheet 13. Furthermore, by gripping the front end 10a of the absorbent body 10, it is possible to hold down with your fingers the position where you start to peel off the release sheet 16. This makes it possible to start peeling off the release sheet 16 while holding down the adhesive portion for main body 15M at the peeling start position, making it possible to peel off the release sheet 16 easily.

[0063] Furthermore, the length of the front compressed region 5a in the lateral direction Y is smaller than the length of the absorbent body 10 in the lateral direction Y. Therefore, there are regions on both sides of the front compressed region 5a in the lateral direction Y where the absorbent body 10 is not compressed. The release sheet 16 is supported by these regions where the absorbent body 10 is not compressed, and a bag-shaped non-contact space 35 is formed in the front compressed region 5a. This prevents contact between the release sheet 16 and the main body adhesive section 15M within the front compressed region 5a, making it possible to maintain the non-contact space 35. Furthermore, by forming the non-contact space 35 in a bag structure, it becomes possible to easily guide the wearer's fingers.

[0064] Next, the arrangement of the front joint portion 18a will be described. As shown in FIG. 2, the front joining portion 18a is positioned so as to overlap at least a portion of the area where the main body adhesive portion 15M and the front compressed region 5a overlap in a plan view. Hereinafter, the area where the adhesive portion for the main body 15M and the front compressed region 5a overlap in a plan view will be referred to as a first overlapping area U1. In the first overlapping area U1, the release sheet 16 is not in contact with the adhesive portion for the main body 15M and is in a floating state. The shape and position of the front joint portion 18a provided between the release sheet 16 and the packaging sheet 17 are set so as to overlap at least a portion of the first overlap region U1.

[0065] In FIG. 2, the two rectangular regions where the two main body adhesive portions 15M, 15M overlap on the lower left and lower right sides of the front compressed region 5a in the figure are the first overlapping regions U1. The front joining portion 18a is a rectangular region that is symmetrically disposed with respect to the center line 33. The length in the vertical direction X of the front joining portion 18a is set to be greater than the length in the vertical direction X of each of the first overlapping regions U1. The length in the horizontal direction Y of the front joining portion 18a is set to be smaller than the length in the horizontal direction Y of the front compressed region 5a and greater than the distance in the horizontal direction Y between the two main body adhesive portions 15M, 15M. The front joint portion 18a configured in this manner is disposed so that the center portion thereof in the longitudinal direction X overlaps with the first overlapping regions U1 on both sides.

[0066] For example, when peeling off the packaging sheet 17 from the front side of the packaging body 30, the release sheet 16 is pulled by the packaging sheet 17 starting from the front joint portion 18a. In other words, the front joint portion 18a is the area where the wearer transmits force from the packaging sheet 17 to the release sheet 16, and is the area where a pulling force acts on the release sheet 16. In this way, the front joining portion 18a, to which a force pulling the release sheet 16 acts, is arranged to overlap the first overlapping region U1 where the release sheet 16 is in a floating state from the main body adhesive portion 15M.

[0067] For example, consider peeling off packaging sheet 17 in the state shown in Figure 5. When peeling off packaging sheet 17, release sheet 16 starts to peel up from the position where it is lifted from main body adhesive portion 15M, and then the portion where release sheet 16 and main body adhesive portion 15M come into contact peels up. This makes it possible to peel off release sheet 16 reliably with a sufficiently small force compared to, for example, a configuration in which release sheet 16 is pulled from the portion where it is not lifted from main body adhesive portion 15M.

[0068] The front edge of the front joint portion 18a is positioned further forward than the front edge 27a of the main body adhesive portion 15M. This allows the release sheet 16 to be pulled up before the position where the main body adhesive portion 15M and the release sheet 16 contact each other when peeling the packaging sheet 17 from the front side. This allows the release sheet 16 to be peeled off smoothly.

[0069] Next, the arrangement of the high-rigidity portion 6 will be described. As shown in FIG. 2, the high stiffness portion 6 is positioned so as to overlap at least a portion of the area where the main body adhesive portion 15M, the front compressed region 5a, and the front joining portion 18a overlap in a plan view. Hereinafter, the area where the main body adhesive portion 15M, the front compressed region 5a, and the front joining portion 18a overlap in plan view will be referred to as the second overlapping region U2. The second overlapping region U2 is the area of ​​the first overlapping region U1 that overlaps with the front joining portion 18a. The shape and position of the high stiffness portion 6 formed on the backsheet 13 side of the absorbent body 10 are set so as to overlap at least a portion with the second overlapping region U2.

[0070] In Figure 2, of the two first overlapping regions U1 formed on either side of the center line 33, the two rectangular regions cut at the side edges along the vertical direction X of the forward joint 18a and formed on the center line 33 side are each the second overlapping region U2. The high rigidity portion 6 is a rectangular region that is arranged symmetrically with respect to the center line 33 and extends in the longitudinal direction X. As described above, the length of the high rigidity portion 6 in the longitudinal direction X is the same as the length of the absorbent body 10 in the longitudinal direction X, and the high rigidity portion 6 is provided across both end edges in the longitudinal direction X of the absorbent body 10. The length of the high rigidity portion 6 in the lateral direction Y is set to be smaller than the length of the front joint portion 18a in the lateral direction Y and larger than the distance in the lateral direction Y between the two main body adhesive portions 15M, 15M. The high-rigidity portion 6 configured in this manner overlaps, on the center line 33 side, with two second overlapping regions U2 that face each other across the center line 33.

[0071] When opening the package 30, if the release sheet 16 is pulled and the napkin 1 is deformed together with the release sheet 16, it may become difficult to peel the release sheet 16 from the napkin 1 (main body adhesive part 15M). Therefore, in this embodiment, the high stiffness portion 6 is arranged so as to overlap with the second overlapping region U2, which is the starting point for starting to peel off the release sheet 16. As described above, the high stiffness portion 6 is an area that is more rigid and less likely to deform than other areas of the absorbent body 10. This increases the stiffness of the starting point for starting to peel off the release sheet 16, thereby suppressing undesired deformation of the napkin 1. As a result, it becomes possible to easily start to peel off the release sheet 16, and high openability can be achieved.

[0072] Furthermore, in this embodiment, the high-rigidity portion 6 is provided up to the front edge of the absorbent body 10 (front compressed region 5a). This makes it difficult for the front edge of the absorbent body 10 to bend, making it easier to maintain the opening shape that serves as the entrance to the non-contact space 35. As a result, it becomes easier to insert fingers into the non-contact space 35 and to grasp the front compressed region 5a. Furthermore, since the front edge of the absorbent body 10 is made more rigid, the entrance to the non-contact space 35 is easier to see, and the wearer's fingers can be guided into the non-contact space 35.

[0073] In this embodiment, the length of the front compressed region 5a in the lateral direction Y is set to be greater than the length of the high rigidity portion 6 in the lateral direction Y. Therefore, the high rigidity portion 6 does not overlap the side ends located on both sides of the front compressed region 5a in the lateral direction Y. As a result, the rigidity of the central portion of the front compressed region 5a is different from the rigidity of the side ends. In particular, the side ends are softer than the central portion, making it easier to create a bag structure. This makes it easier to insert a finger from the front edge of the front compressed region 5a. As a result, it is possible to improve the operability when opening the package 30.

[0074] The high-rigidity portion 6 is formed by integrally bonding the absorbent core 2 and the core wrap sheet 3 with an adhesive such as a hot-melt adhesive, which prevents the core wrap sheet 3 from floating away from the absorbent core 2, making it easier to peel off the release sheet 16. Furthermore, the absorbent core 2 is adhered to the backsheet 13 via the core wrap sheet 3. This prevents the backsheet 13 from floating away from the absorbent core 2, making it easier to peel off the release sheet 16. The adhesive that forms the high stiffness portion 6 is applied to the multilayer region 25 where the core wrap sheet 3 overlaps. In other words, the high stiffness portion 6 can be easily realized by using the adhesive that seals the core wrap sheet 3 that wraps the absorbent core 2.

[0075] Furthermore, the adhesive portions 15M, 15M for the main body are not adhered to the release sheet 16 in the front compressed region 5a and the rear compressed region 5b, which are the recessed portion 5. Therefore, in the areas of the adhesive portions 15M, 15M for the main body that overlap with the front compressed region 5a and the rear compressed region 5b, a decrease in adhesive strength can be suppressed compared to the parts that are adhered to the release sheet 16. As a result, the adhesive strength of the adhesive portions 15M, 15M for the main body located in these areas remains sufficiently strong, allowing the napkin 1 to adhere well to clothing at the front and rear, and sufficiently preventing the napkin 1 from peeling off while being worn.

[0076] (Position of the adhesive part for the main body, the compressed area, the joint, and the overlapping area of ​​the high-rigidity part) As shown in FIG. 2, the adhesive portion for the main body 15M, the front compressed region 5a, the front joining portion 18a, and the high stiffness portion 6 overlap at the center portion 31 in the lateral direction Y of the absorbent body 10 in a plan view. Hereinafter, the region where the main body adhesive portion 15M, the front compressed region 5a, the front joining portion 18a, and the high stiffness portion 6 overlap in a plan view will be referred to as the third overlapping region U3. The third overlapping region U3 is the region of the second overlapping region U2 that overlaps with the high stiffness portion 6. In the package 30, the third overlapping region U3 is formed in the central portion 31 of the absorbent body 10 in the lateral direction Y.

[0077] In Fig. 2, of the two second overlapping regions U2 formed on either side of the center line 33, the two rectangular regions cut at the side edges of the high stiffness portion 6 along the longitudinal direction X and formed on the center line 33 side are the third overlapping regions U3. These third overlapping regions U3 are located in the central portion 31 of the absorbent body 10 in the lateral direction Y.

[0078] The third overlapping region U3 is a region where the release sheet 16 is lifted from the main body adhesive portion 15M, where the release sheet 16 is pulled from, and where the rigidity of the napkin 1 (absorbent body 10) is increased. Therefore, when opening the package 30, the napkin 1 can be grasped in the third overlapping region U3 and the surrounding area, thereby achieving excellent openability. For example, when a wearer takes out a napkin 1 from the package 30, they generally hold the napkin 1 near its center. Therefore, by providing the third overlapping region U3 in the central portion 31 of the absorbent body 10, the wearer will naturally grasp the third overlapping region U3 and the region nearby. As a result, the wearer can easily open the package 30.

[0079] 2, the adhesive portion for the main body 15M, the front compressed region 5a, the front joining portion 18a, and the high stiffness portion 6 overlap in a plan view at the front end portion 10a in the longitudinal direction X of the absorbent body 10. That is, in the packaging body 30, a third overlapping region U3 is formed at the front end portion 10a in the longitudinal direction X of the absorbent body 10.

[0080] 6 and 7, in this embodiment, the package 30 is folded at the first fold line L1 and the second fold line L2 so that the front region M1 is located outside the rear region M3. Therefore, after peeling off the tab tape T, the wearer will first grasp the front region M1 of the package 30. That is, the wearer will often grasp the front ends of the package sheet 17 and the napkin 1 in the longitudinal direction X. For this reason, by providing the third overlapping region U3 at the front end 10a of the absorbent body 10, the wearer who peels off the tab tape T will naturally grasp the third overlapping region U3 and the area nearby, making it possible to easily open the package 30.

[0081] 6 and 7. For example, the packaging body 30 may be folded so that the rear region M3 is located outside the front region M1. In this case, first, the topsheet 12 in the front region M1 is folded along the first fold line L1 so as to join with the topsheet in the middle region M2, and then the topsheet 12 in the rear region M3 is folded along the second fold line L2 so as to join with the packaging sheet 17 in the front region M1. In such a case, the rear of the package 30 is configured so that the adhesive portion for the main body 15M, the rear compressed region 5b, the rear joint portion 18b, and the high stiffness portion 6 overlap at the rear end portion 10b in the longitudinal direction X of the absorbent 10 in a plan view. This allows the wearer to naturally hold the overlapping region of the adhesive portion for the main body 15M, the rear compressed region 5b, the rear joint portion 18b, and the high stiffness portion 6 formed at the rear of the package 30, and the vicinity thereof, making it possible to easily open the package 30.

[0082] <Examples of dimensions for each component> Examples of dimensions of each component will be described below, but these values ​​are merely examples and are not intended to be limiting. In this embodiment, the length of the napkin 1 in the longitudinal direction X is 250 mm, and the length of the main body M in the lateral direction Y is 73 mm. The length a of the front compressed region 5a in the transverse direction Y is 35 mm, and the length b of the front compressed region 5a in the longitudinal direction X is 12.5 mm. The length c of the rear compressed region 5b in the transverse direction Y is 35 mm, and the length d of the rear compressed region 5b in the longitudinal direction X is 5 mm. The maximum length D1 of the high-rigidity portion 6 in the transverse direction Y is preferably 10 mm or more, more preferably 20 mm or more, and preferably 60 mm or less, more preferably 50 mm or less. The maximum length D2 of the high basis weight portion 21 in the transverse direction Y is 35 mm. Here, the length a of the front compression zone 5a in the lateral direction Y and the length c of the rear compression zone 5b in the lateral direction Y are the same as length D1. It is preferable that the length a of the front compression zone 5a in the lateral direction Y and the length c of the rear compression zone 5b in the lateral direction Y are equal to or greater than D2.

[0083] The fact that the high rigidity portion 6 has higher rigidity than the surrounding area of ​​the high rigidity portion 6 can be evaluated by measuring the rigidity using a handle-ometer. Specifically, the napkin is stored in a test room at a temperature of 23°C and a humidity of 50% for 24 hours, and then used as a measurement sample. The stiffness value can be measured under the same temperature and humidity conditions using the handle-ometer method (JIS L-1096). The handle-o-meter used was a model HOM-200 manufactured by Daiei Scientific Instruments Co., Ltd. The measurement sample was placed on the sample stage with the back sheet 13 facing downward and the longitudinal direction X of the napkin perpendicular to the extension direction of the 40 mm wide slot, and the penetrator blade was lowered at a constant speed of 200 mm / min, and the maximum value indicated by the indicator (load meter) was read. This method makes it possible to measure the rigidity of the high rigidity portion 6.

[0084] The maximum length D2 in the horizontal direction Y of the high basis weight section 21 is preferably 25 mm or more, more preferably 30 mm or more, and preferably 50 mm or less, more preferably 45 mm or less, from the viewpoint of ensuring an area that efficiently absorbs excrement from the excretory area. The maximum length D3 in the transverse direction Y between the pair of leakage-preventing vertical grooves 4a, 4a is preferably 30 mm or more, more preferably 35 mm or more, and is preferably 70 mm or less, more preferably 65 mm or less.

[0085] The lengths of the front compressed region 5a and the rear compressed region 5b in the lateral direction Y are appropriately set according to the length D2 of the high basis weight portion 21 in the lateral direction Y. For example, the length a of the front compressed region 5a in the transverse direction Y is preferably 15 mm or more, more preferably 20 mm or more, and preferably 55 mm or less, more preferably 50 mm or less. The length c of the rear compressed region 5b in the transverse direction Y is preferably 15 mm or more, more preferably 20 mm or more, and preferably 55 mm or less, more preferably 50 mm or less. The length a (length c) in the horizontal direction Y of the front compression area 5a (rear compression area 5b) is the distance between the outer edges of the pair of compression grooves 26a (pair of compression grooves 26b) located furthest outward in the horizontal direction Y of the front compression area 5a (rear compression area 5b).

[0086] The length in the longitudinal direction X of each of the front compression region 5a and the rear compression region 5b is appropriately set depending on the length in the longitudinal direction X of the napkin, the position of the leakage preventing grooves, and the like. The length b of the front compressed region 5a in the longitudinal direction X is preferably 5 mm or more, more preferably 7 mm or more, and is preferably 25 mm or less, more preferably 20 mm or less. The length d of the rear compressed region 5b in the longitudinal direction X is preferably 2 mm or more, more preferably 5 mm or more, and is preferably 20 mm or less, more preferably 15 mm or less. In the front compression zone 5a (rear compression zone 5b), the compression grooves 26a (compression grooves 26b) may have different lengths in the vertical direction X. The length b (length d) in the vertical direction X of the front compression zone 5a (rear compression zone 5b) is the length of the longest compression groove 26a (compression groove 26b).

[0087] In the packaging body 30, the depth in the thickness direction Z of the compression grooves 26a and 26b is preferably 0.3 mm or more, more preferably 0.5 mm or more, from the viewpoint of forming a sufficient step and rigidity difference at the boundary portion between the front compression region 5a and the rear compression region 5b, and is preferably 3.0 mm or less, more preferably 2.0 mm or less. The width of the compressed grooves 26a and 26b is preferably 0.5 mm or more, more preferably 1.0 mm or more, and is preferably 3.0 mm or less, more preferably 2.0 mm or less. In the compressed grooves 26a and 26b, the distance between adjacent grooves in the lateral direction Y is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 3.0 mm or less, more preferably 2.0 mm or less. In the napkin 1 and the packaging body 30, the number of each compression groove 26a (compression groove 26b) in the front compression area 5a (rear compression area 5b) is not limited to the example shown in the figure, and is preferably 2 or more, more preferably 5 or more, and preferably 25 or less, more preferably 20 or less.

[0088] <Other configuration examples> The present invention is not limited to the above-described embodiment, and various modifications can be made thereto.

[0089] In the above-described embodiment, the front compressed region 5a and the rear compressed region 5b are formed as the recessed portions 5 at the front end 10a and the rear end 10b of the absorbent body 10, respectively. As described above, the configuration is not limited to providing recessed portions 5 at both ends of the absorbent body 10 in the longitudinal direction X, and recessed portions 5 (compressed regions) may be formed at either the front end 10a or the rear end 10b of the absorbent body 10, for example. For example, as shown in Figures 6 and 7, when the packaging body 30 is folded so that the front region M1 faces outward, a front compressed region 5a is formed in the front end portion 10a of the absorbent body 10. In this case, it is not necessary to form a rear compressed region 5b in the rear end portion 10b. When the packaging body 30 is folded so that the rear region M3 faces outward, a rear compressed region 5b is formed in the rear end portion 10b of the absorbent body 10. In this case, it is not necessary to form a front compressed region 5a in the front end portion 10a. In either case, after peeling off the tab tape T, the wearer can naturally hold the part where the compressed area 5 and the adhesive part for the main body 15M overlap and the release sheet 16 is raised, making it possible to easily peel off the release sheet 16. Alternatively, recessed portions 5 (compressed regions 5) may be formed at the side edges of the absorbent body 10. Even in such a case, by configuring the recessed portions 5 so as to partially overlap the edge 27 of the adhesive portion for the main body 15M, a raised portion of the release sheet 16 is formed, thereby improving the ease of opening.

[0090] Furthermore, the depressions 5 do not need to be formed using compressed grooves. For example, the thickness of the absorbent body 10 may be reduced by pressing the entire area of ​​the absorbent body 10 where the depressions 5 are to be provided. In this case, the press working is performed so as to depression the absorbent body 10 at least from the backsheet 13 side toward the topsheet 12 side. Alternatively, the depressions 5 may be formed without performing a compression process, etc. For example, the absorbent body 10 may be constructed using an absorbent body mold or the like in which the shape of the depressions 5 is formed in advance. In this way, even if no compressed grooves are used, by recessing the absorbent body 10 from the backsheet 13 side toward the topsheet 12 side, it is possible to realize a floating state of the release sheet 16.

[0091] In the above-described embodiment, the adhesive portion for the main body 15M is configured as two stripe-shaped regions along the vertical direction X. The configuration of the adhesive portion for the main body 15M is not limited, and for example, the adhesive portion for the main body 15M may be configured as two or more stripe-shaped regions along the vertical direction X. The adhesive portion for the main body 15M may also be configured as a plurality of stripe-shaped regions along the horizontal direction Y. The adhesive portion for the main body 15M may also be configured as a single region. In any case, by configuring the edge 27 of the main body adhesive portion 15M to overlap the recessed portion 5, the release sheet 16 is placed in a floating state, making it possible to realize a package 30 that is easy to open.

[0092] In the above-described embodiment, the high stiffness portion 6 is provided over both ends of the absorbent body 10 in the longitudinal direction X. For example, the front edge (rear edge) of the high stiffness portion 6 may be positioned more inward than the front edge (rear edge) of the front compressed region 5a (rear compressed region 5b). Alternatively, the high stiffness portion 6 may be composed of a plurality of regions. Furthermore, the high stiffness portion 6 may be made of a material other than adhesive. For example, the high stiffness portion 6 may be provided by utilizing a sheet member or the like that has higher stiffness than other regions of the absorbent body 10. Even in such a case, by configuring the high rigidity portion 6 so that it overlaps with the area where the adhesive portion for the main body 15M, the front compression region 5a (rear compression region 5b), and the front joint portion 18a (rear joint portion 18b) overlap, it is possible to realize a packaging body 30 that allows the release sheet 16 to be easily peeled off.

[0093] Furthermore, in the above-described embodiment, a napkin having a wing portion W was used as an example, but the present invention may also be applied to a napkin that does not have a wing portion W. Similarly, by providing an adhesive portion 15M for the main body, a front compression region 5a (rear compression region 5b), a front joint portion 18a (rear joint portion 18b), and a high rigidity portion 6, it is possible to improve the ease of opening the packaging body 30. [Explanation of symbols]

[0094] 1... Napkins (absorbent articles) 5...Compression area (depression area) 6…High rigidity part 10...Absorbent 12...Surface sheet 13...Back sheet 15…Adhesive part 16...Release sheet 17...Packaging sheet 18…Joint part 27...Edge 30...packaging

Claims

1. A package in which an absorbent article is packaged with a packaging sheet to which a release sheet is fixed, The absorbent article has a vertical direction corresponding to the front-to-back direction of a wearer and a horizontal direction perpendicular to the vertical direction, and includes a top sheet, a back sheet, an absorbent body disposed between the top sheet and the back sheet, and an adhesive portion for a main body provided on the non-skin-facing side of the back sheet, the adhesive portion for the main body is releasably covered with the release sheet, the packaging body is divided into a front region, a middle region, and a rear region by a first fold line and a second fold line, each extending in the horizontal direction, and one of the front region and the rear region is an upper folding region and the other is a lower folding region, and the top sheet of the upper folding region is folded so as to overlap the packaging sheet of the lower folding region, The absorbent body is a recessed portion recessed toward the top sheet side together with the back sheet at a tip end portion located within the upper folding region, the recessed portion having a thickness that partially overlaps an edge of the adhesive portion for the main body in a plan view seen from the thickness direction; By having the recessed portion, a non-contact space is provided at the tip portion located within the upper folding region, where the release sheet and the main body adhesive portion are not in contact with each other, The recessed portion is a compressed region formed by compressing the absorbent body in the thickness direction. A package for absorbent articles.

2. The packaging body further includes a joining portion that joins the release sheet and the packaging sheet, the joining portion being positioned so as to overlap at least a portion of a region where the main body adhesive portion and the recessed portion overlap in the plan view. The absorbent article package according to claim 1.

3. The absorbent body has a high-rigidity portion that is a region having higher rigidity than other regions of the absorbent body, and the high-rigidity portion is positioned so as to overlap at least a part of a region where the main body adhesive portion, the recessed portion, and the joint portion overlap in the plan view. The absorbent article package according to claim 2.

4. The high-rigidity portion is formed by an adhesive applied to the absorbent body. The absorbent article package according to claim 3.

5. The absorbent body has an absorbent core and a core wrap sheet that covers the absorbent core, The high stiffness portion includes an area where an adhesive is provided to seal the core wrap sheet that covers the absorbent core. The absorbent article package according to claim 4.

6. The absorbent core is bonded to the back sheet via the core wrap sheet with an adhesive. The absorbent article package according to claim 5.

7. the high-rigidity portion is provided along the longitudinal direction in the central portion of the absorbent body in the lateral direction, The lateral length of the recessed portion is greater than the lateral length of the high-rigidity portion. A package for absorbent articles according to any one of claims 3 to 6.

8. The main body adhesive portion, the recessed portion, the joint portion, and the high stiffness portion overlap at the center portion of the absorbent body in the lateral direction in the plan view. A package for absorbent articles according to any one of claims 3 to 7.

9. The adhesive portion for the main body, the recessed portion, the joining portion, and the high-rigidity portion overlap with at least one of the front end portion and the rear end portion in the longitudinal direction of the absorbent body in the plan view. A package for absorbent articles according to any one of claims 3 to 8.

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