Absorbent article

Abstract

To provide an absorbent article that has reduced unpleasant smells while having an insect-repellent function.SOLUTION: An absorbent article (1) has a plurality of materials and includes an insect-repellent fragrance (40) positioned therein. At least some of the plurality of materials are bonded with a hot-melt adhesive (LA) that contains a hydrogenated pressure-sensitive adhesion-imparting agent.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Patent Document 1 discloses an absorbent article to which a microencapsulated natural plant extract exhibiting insect repellent effect is applied. Some natural plants (e.g., cinnamon, rosemary, lavender, mint, eucalyptus, etc.) contain fragrant components with repellent properties, and applying an extract of such natural plants to an absorbent article can keep insects away from the absorbent article. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2012-522618 Summary of the Invention [Problem to be solved by the invention]

[0004] An absorbent article is composed of multiple materials such as a liquid-impermeable back sheet, a liquid-permeable top sheet, and an absorbent core. These materials are generally bonded together with a hot melt adhesive. Some tackifiers contained in hot melt adhesives have an undesirable odor. In an absorbent article using a hot melt adhesive containing such a tackifier, the odor of the hot melt adhesive is released to the outside. Therefore, if a fragrance with an insect repellent effect is added to an absorbent article that smells of the hot melt adhesive, the two may mix together and cause the user of the absorbent article to feel an unpleasant odor.

[0005] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an absorbent article that has an insect-repellent function while reducing unpleasant odors. [Means for solving the problem]

[0006] The main invention for achieving the above-mentioned object is an absorbent article having a plurality of materials and having an insect repellent fragrance disposed therein, characterized in that at least some of the plurality of materials are adhered with a hot melt adhesive containing a hydrogenated tackifier. Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0007] According to the present invention, it is possible to provide an absorbent article that has an insect-repellent function and reduces unpleasant odors. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view of a tape-type disposable diaper 1 in an open and extended state, as viewed from the skin side. [Diagram 2] 2A is a schematic cross-sectional view of a ventral waist portion 3 of the diaper 1, FIG. 2B is a schematic cross-sectional view of a crotch portion 5 of the diaper 1, and FIG. 2C is a schematic cross-sectional view of a rear waist portion 7 of the diaper 1. As shown in FIG. [Diagram 3] 3A and 3B are explanatory diagrams of hot melt adhesives A1 to A9 used in the diaper 1 of the first embodiment. [Figure 4] FIG. 2 is an exploded perspective view of the fastening tape 30 and its surroundings. [Diagram 5] 1 is a diagram showing a schematic arrangement of an insect repellent fragrance 40 on a cross section of a fastening tape 30. FIG. [Figure 6] 6A and 6B are diagrams showing a modification of the diaper 1 of the first embodiment. [Figure 7] 7A and 7B are explanatory diagrams of hot melt adhesives A1 to A9 used in the diaper 1 of the second embodiment. [Figure 8] FIG. 8 is an exploded perspective view of the exterior sheet 24 and its periphery. [Figure 9]9A and 9B are explanatory diagrams of hot melt adhesives A1 to A9 used in the diaper 1 according to other embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] At least the following points will become apparent from the description of this specification and the accompanying drawings. An absorbent article having a plurality of materials and an insect repellent fragrance disposed thereon, characterized in that at least a portion of the plurality of materials are adhered by a hot melt adhesive containing a hydrogenated tackifier.

[0010] According to such an absorbent article, the insect repellent fragrance provides an insect repellent function, while the hot melt adhesive containing the hydrogenated tackifier can suppress the odor of the hot melt adhesive released to the outside of the absorbent article. Thus, in the absorbent article, the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the insect repellent fragrance is reduced.

[0011] Such an absorbent article is characterized in that the multiple materials include an absorbent body and a non-skin side material arranged on the non-skin side of the absorbent body in the thickness direction of the absorbent article, and at least a portion of the hot melt adhesive that bonds the non-skin side materials together contains the hydrogenated tackifier.

[0012] According to such an absorbent article, the odor of the hot melt adhesive placed on the non-skin side of the absorbent body is likely to be released to the outside, but this odor is suppressed and the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance is also reduced.

[0013] Such an absorbent article is characterized in that, when the absorbent article is viewed in a plane in the thickness direction, the area in which the insect repellent fragrance is disposed has a portion that overlaps with the area in which the hot melt adhesive containing the hydrogenated tackifier is disposed.

[0014] Such an absorbent article suppresses the odor of the hot melt adhesive, which easily mixes with the scent of the insect repellent fragrance, and also reduces the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance.

[0015] The absorbent article is characterized in that a hot melt adhesive containing the hydrogenated tackifier is placed in a greater amount by weight on the absorbent article than the insect repellent fragrance.

[0016] According to such an absorbent article, the odor of the hot melt adhesive can be suppressed by using a hot melt adhesive containing a hydrogenated tackifier, which eliminates the need to increase the amount of insect repellent fragrance to counter the odor of the hot melt adhesive, thereby reducing costs.

[0017] The absorbent article is characterized in that some of the plurality of materials are bonded with a hot melt adhesive containing the hydrogenated tackifier, and another portion of the plurality of materials are bonded with a hot melt adhesive not containing the hydrogenated tackifier, and the hot melt adhesive containing the hydrogenated tackifier is placed on the absorbent article by a greater weight than the hot melt adhesive not containing the hydrogenated tackifier.

[0018] According to such an absorbent article, the odor of the hot melt adhesive released to the outside of the absorbent article can be further suppressed, and the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance can also be further reduced.

[0019] The absorbent article is characterized in that all of the hot melt adhesives that bond the plurality of materials together are hot melt adhesives that contain the hydrogenated tackifier.

[0020] According to such an absorbent article, the strong odor of the hot melt adhesive that does not contain a hydrogenated tackifier does not mix with the insect repellent fragrance, thereby preventing the generation of an unpleasant odor.

[0021] Such an absorbent article is characterized in that a hot melt adhesive arranged on the non-skin side of the insect repellent fragrance in the thickness direction of the absorbent article contains the hydrogenated tackifier.

[0022] According to such an absorbent article, the odor of the hot melt adhesive placed on the non-skin side is easily released to the outside, but this odor is suppressed and the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance is also reduced. Also, since the insect repellent fragrance is placed closer to the skin than the material that will be the outermost layer of the absorbent article, the duration of the insect repellent fragrance is increased.

[0023] The absorbent article is characterized in that, in the thickness direction of the absorbent article, the insect repellent fragrance is arranged on the non-skin side relative to the hot melt adhesive containing the hydrogenated tackifier.

[0024] With such an absorbent article, the unpleasant odor caused by the mixture of the hot melt adhesive odor and the insect repellent fragrance is reduced, while the insect repellent fragrance is disposed in the material that forms the outermost layer of the absorbent article, thereby enhancing the insect repellent effect.

[0025] Such an absorbent article has a vertical direction and a horizontal direction, and has a pair of fastening tapes extending outward in both horizontal directions from a back waist portion that is placed against the back side of the wearer, the fastening tapes have a fixing portion that is fixed to the back waist portion and an extending portion that extends from the back waist portion, and are equipped with a hook material that engages with the abdominal waist portion that is placed against the abdominal side of the wearer, the insect repellent fragrance is disposed on the non-skin side portion of the extending portion of the fastening tape, and the hot melt adhesive disposed on the skin side of an exterior sheet that forms at least a part of the non-skin side of the absorbent article contains the hydrogenated tackifier.

[0026] According to such an absorbent article, since the insect repellent fragrance is disposed on the extending portion of the fastening tape, the insect repellent fragrance is easily released to the outside, and the insect repellent effect is enhanced. Also, since the hot melt adhesive disposed on the exterior sheet is located closer to the skin and the amount disposed is relatively large, the odor of the hot melt adhesive is easily released to the outside, but the odor is suppressed, and the unpleasant odor of the hot melt adhesive mixed with the insect repellent fragrance is reduced.

[0027] The absorbent article is characterized in that the insect repellent fragrance contains a fragrance derived from any one of lemongrass, citronella, and lemon eucalyptus.

[0028] According to such absorbent articles, essential oils derived from the above-mentioned natural plants are preferable because they are relatively easy to obtain and contain many compounds that are effective ingredients in repelling insects.

[0029] The absorbent article is characterized in that the insect repellent fragrance contains a plurality of fragrances having different boiling points.

[0030] In such an absorbent article, the high boiling point fragrance can increase the duration of the insect repellent effect, while the low boiling point fragrance can make the user aware of the insect repellent fragrance from an early stage.

[0031] The absorbent article is characterized in that the insect repellent fragrance contains at least one fragrance selected from group (A) having a boiling point of 200°C or higher and 220°C or lower, and at least one fragrance selected from group (B) having a boiling point of 150°C or higher and lower than 200°C, and the weight ratio of group (A) in the components is higher than the weight ratio of group (B). (A) group: citronellal, menthol, α-terpineol, linalyl acetate, isopulegol, ethyl linalool, terpinyl acetate, geranyl formate, menthone, borneol, camphor, (B) group: Menthane, camphene, tetrahydrolinalool, dihydromyrcenol, ocimenol, ocimene, myrcene, α-pinene, β-pinene, α-phellandrene, α-terpinene, γ-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3,5,5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2,4-hexadiene-1-ol, 1-octen-3-ol, 2,6-nonadienol, tetrahydromugol, 4-thuyanol, n-heptanal, n-octanal, 3,5,5-trimethylhexanal, cis-3-hexenal, 2, 4-Hexadienal, 2,6-Nonadienal, heptanal dimethyl acetal, octanal dimethyl acetal, citral dimethyl acetal, 2-heptanone, 2-octanone, 3-octanone, 2-nonanone, 3-nonanone, methylheptenone, fenchone, acetylfuran, linalool oxide, menthofuran, 1,8-cineole, 1,4-cineole, 2,2,6-trimethyl-6-vinyltetrahydropyran, cis-3-hexenyl formate, prenyl acetate, hexyl acetate, cis-3-hexenyl acetate, trans-2-hexenyl acetate, heptyl acetate, hexyl propionate, cis-3-hexenyl butyrate, cis-3-hexenyl isobutyrate, ethyl 2-methylvalerate, ethyl heptanoate, allyl hexanoate

[0032] In such an absorbent article, the fragrance of group (A) having a high weight ratio provides an insect repellent effect, and the fragrance of group (B) allows the user to recognize the insect repellent fragrance from an early stage.

[0033] Such an absorbent article is characterized in that the multiple materials include an absorbent body and a liquid-impermeable sheet arranged on the non-skin side of the absorbent body in the thickness direction of the absorbent article, and the insect repellent fragrance is arranged on the non-skin side of the liquid-impermeable sheet in the thickness direction.

[0034] In such an absorbent article, the insect repellent fragrance is placed on the non-skin side of the liquid-impermeable sheet, which has relatively low breathability, so that the insect repellent fragrance is easily released to the outside of the absorbent article, thereby enhancing the insect repellent effect.

[0035] Hereinafter, a tape-type disposable diaper for children will be described as an example of an absorbent article according to the embodiment. However, the absorbent article is not limited to the above, and disposable diapers for adults, pants-type disposable diapers, light incontinence pads, sanitary napkins, panty liners, etc. can be used.

[0036] ===Basic configuration of tape-type disposable diaper 1=== Fig. 1 is a plan view of a tape-type disposable diaper 1 (hereinafter also referred to as "diaper") in a longitudinally unfolded and stretched state, as viewed from the skin side. Fig. 2A is a schematic cross-sectional view of a ventral waist portion 3 of the diaper 1, Fig. 2B is a schematic cross-sectional view of a crotch portion 5 of the diaper 1, and Fig. 2C is a schematic cross-sectional view of a rear waist portion 7 of the diaper 1.

[0037] The diaper 1 has a longitudinal direction (vertical direction) and a width direction (horizontal direction). The diaper 1 also has a ventral waist portion 3 that is placed against the ventral side of the wearer, a crotch portion 5 that is placed between the crotch of the wearer, and a dorsal waist portion 7 that is placed against the dorsal side of the wearer, which are aligned in the longitudinal direction. As shown in Fig. 2A, the direction in which the members constituting the diaper 1 are layered is called the thickness direction. In the thickness direction, the side that contacts the wearer is called the skin side, and the opposite side is called the non-skin side.

[0038] The diaper 1 comprises an absorbent body 21, a top sheet 22, a leak-proof sheet 23, an exterior sheet 24, a pair of side sheets 26, a waist gather film 28, a target tape 29, and a pair of fastening tapes 30.

[0039] The absorbent body 21 has an absorbent core 211, and examples of the absorbent core 211 include liquid-absorbent fibers such as pulp fibers impregnated with superabsorbent polymer (so-called SAP) and molded into a predetermined shape, an SAP sheet in which an SAP layer is attached to a hydrophilic sheet, an airlaid sheet in which liquid-absorbent fibers are molded into a sheet shape by an airlaid method, etc. The absorbent core 211 may be covered with a core wrap 212 such as liquid-permeable tissue paper or nonwoven fabric.

[0040] The top sheet 22 is a liquid-permeable sheet arranged closer to the skin than the absorbent body 21 in the thickness direction. The leakproof sheet 23 is a liquid-impermeable sheet arranged closer to the skin than the absorbent body 21 in the thickness direction. The exterior sheet 24 is a sheet (e.g., nonwoven fabric, etc.) arranged closer to the skin than the leakproof sheet 23 in the thickness direction. The pair of side sheets 26 are sheets (e.g., nonwoven fabric, etc.) extending outward in the width direction from both side portions of the top sheet 22 in the width direction.

[0041] A pair of leg-hole elastic members 15 (e.g., rubber thread or a stretchable sheet) that stretch in the longitudinal direction are provided at the edge portions that form the leg-hole openings of the diaper 1, allowing the diaper 1 to fit around the legs of the wearer. The leg-hole elastic members 15 are fixed between the side sheet 26 and the outer sheet 24 in a stretched state in the longitudinal direction.

[0042] Further, a pair of leakproof wall elastic members 16 (e.g., rubber thread or a stretchable sheet) that stretch in the longitudinal direction are provided on the inside of the leg-hole elastic members 15 in the width direction. The leakproof wall elastic members 16 are fixed in a stretched state in the longitudinal direction between the portions where the inner side portions in the width direction of the side sheets 26 are folded back to the outside in the width direction (see FIG. 2B). As the leakproof wall elastic members 16 contract, parts of the side sheets 26 stand up against the skin, blocking excrement.

[0043] In the rear waist portion 7, a waist gather film 28 is disposed between the absorbent body 21 and the leakproof sheet 23 (see FIG. 2C). The waist gather film 28 is a strip-shaped member that stretches in the width direction. The waist gather film 28 imparts stretchability to the rear waist portion 7, allowing the diaper 1 to fit the waist of the wearer.

[0044] A pair of flap portions 14 are provided on both sides in the width direction of the back waist portion 7. The flap portion 14 is mainly composed of a side sheet 26 and an exterior sheet 24. A pair of fastening tapes 30 extend from the back waist portion 7 (flap portion 14) to both outsides in the width direction (lateral direction). The fastening tape 30 is a sheet member (e.g., hydrophobic spunbond nonwoven fabric) having a substantially rectangular shape that is long in the width direction, and has a fixing portion 32 fixed to the back waist portion 7 and an extending portion 31 extending from the back waist portion. A hook member 33 (e.g., a male member of a hook-and-loop fastener) that engages with the ventral waist portion 3 is provided on the skin side of the fastening tape 30.

[0045] The target tape 29 is disposed on the non-skin side of the exterior sheet 24 of the ventral waist portion 3 (see FIG. 2A). The target tape 29 is a member that can engage with the hook material 33 of the fastening tape 30, and is formed of, for example, a nonwoven fabric. The target tape 29 in this embodiment is a rectangular member that is aligned in the width direction.

[0046] When the diaper 1 is put on, the unfolded diaper 1 is folded in two at approximately the center in the longitudinal direction while being placed on the wearer. Next, the pair of flap portions 14 of the back-side waist portion 7 are folded back inward in the width direction. Finally, the hook members 33 of the fastening tape 30 are fastened to the target tape 29 of the ventral-side waist portion 3.

[0047] However, the configuration of the diaper 1 is not limited to the above. For example, the diaper 1 may not have the target tape 29, and the hook material 33 of the fastening tape 30 may directly engage with the exterior sheet 24. Also, for example, the diaper 1 may not have the waist gather film 28 or the exterior sheet 24.

[0048] ===First embodiment=== Fig. 3A and Fig. 3B are explanatory diagrams of hot melt adhesives A1-A9 used in the diaper 1 of the first embodiment. Fig. 3A is a cross-sectional view of the ventral side of the diaper 1, and Fig. 3B is a cross-sectional view of the dorsal side of the diaper 1. Fig. 4 is an exploded perspective view of the periphery of a fastening tape 30. Fig. 5 is a diagram showing a schematic arrangement of an insect repellent fragrance 40 on a cross-section of the fastening tape 30. Figs. 6A and 6B are diagrams showing modified examples of the diaper 1 of the first embodiment.

[0049] In the diaper 1 of the first embodiment, an insect repellent fragrance 40 having an insect repellent effect (insect repellent effect, evasion effect) is disposed on the non-skin side portion 301 of the extension portion 31 of the fastening tape 30. The non-skin side of the fastening tape 30 refers to the side that is on the outside (opposite the wearer side) when the fastening tape 30 is engaged with the target tape 29 while the diaper 1 is being worn, and also refers to the side that is on the underside of the fastening tape 30 when the diaper 1 is in an unfolded state as shown in Fig. 1 and placed with the skin side facing up.

[0050] The inclusion of the insect repellent fragrance 40 in the diaper 1 prevents insects such as mosquitoes from approaching the wearer while wearing the diaper 1, thereby reducing the risk of the wearer being bitten by insects. In addition, the intrusion of insects into the diaper 1 during distribution and storage can be prevented, allowing the diaper 1 to be kept hygienic.

[0051] Meanwhile, the diaper 1 is composed of a plurality of materials such as an absorbent body 21 and a top sheet 22. As shown in Figs. 3A and 3B, each material in the diaper 1 is bonded to adjacent materials in the thickness direction with hot melt adhesives A1 to A9. In the diaper 1 of the first embodiment, all materials are bonded to adjacent materials with hot melt adhesives A1 to A9. However, this is not limited thereto, and it is sufficient that at least some of the plurality of materials in the diaper 1 are bonded with a hot melt adhesive. In other words, some of the materials may be bonded by a method other than the bonding method using a hot melt adhesive (for example, thermal welding, etc.).

[0052] 4, the areas where the hot melt adhesives A4, A8, and A9 are applied are indicated by diagonal lines, but the hot melt adhesives may be applied over the entire area or may be applied partially within the area. In other words, the hot melt adhesive may be applied in a solid manner or in a known application pattern (for example, a spiral pattern, an Ω pattern, a line pattern, etc.).

[0053] In general, hot melt adhesives contain a base polymer (thermoplastic block copolymer) as the main component and a tackifier. If necessary, the hot melt adhesive also contains wax, plasticizer, filler, stabilizer, etc.

[0054] Examples of tackifiers contained in hot melt adhesives include rosin-based resins, terpene-based resins, and petroleum-based resins. Some tackifiers have an undesirable odor. In a diaper using a hot melt adhesive containing such a tackifier, the odor of the hot melt adhesive is released to the outside of the diaper. Therefore, if the insect repellent fragrance 40 is placed in a diaper that has a strong odor of the hot melt adhesive, the odor of the hot melt adhesive and the insect repellent fragrance 40 may mix, and the user of the diaper (the wearer, the caregiver, etc.) may feel an unpleasant odor.

[0055] Therefore, in the diaper 1 of the first embodiment, at least some of the materials contained in the diaper 1 are adhered with a hot melt adhesive containing a hydrogenated tackifier.

[0056] By hydrogenating the tackifier to form a hydrogenated derivative, the odor of the tackifier can be reduced. In other words, a hot melt adhesive containing a hydrogenated tackifier has a reduced odor compared to a hot melt adhesive that does not contain a hydrogenated tackifier. In the following description, a hot melt adhesive that contains a hydrogenated tackifier and has a reduced odor is also referred to as a "low odor adhesive LA." A hot melt adhesive that does not contain a hydrogenated tackifier is also referred to as a "non-hydrogenated adhesive NA."

[0057] By using the low odor adhesive LA for at least a part of the hot melt adhesive used in the diaper 1 of the first embodiment, it is possible to suppress the odor of the hot melt adhesive released to the outside of the diaper 1. Therefore, even if an insect repellent fragrance 40 is placed in the diaper 1, it is possible to suppress the odor of the hot melt adhesive from mixing with the insect repellent fragrance 40 to produce an unpleasant odor. In other words, in the diaper 1 of the first embodiment, the insect repellent fragrance 40 provides an insect repellent function while reducing unpleasant odors.

[0058] Specific examples of the low odor adhesive LA include those containing hydrogenated rosin resins, hydrogenated terpene resins, hydrogenated petroleum resins, etc. All of the tackifiers (resins) in the low odor adhesive LA may be hydrogenated tackifiers (hydrogenated derivatives), or some of the tackifiers in the low odor adhesive LA may be hydrogenated tackifiers (hydrogenated derivatives) and the other part may be non-hydrogenated tackifiers.

[0059] As described above, in the diaper 1 of the first embodiment, the insect repellent fragrance 40 is disposed on the non-skin side portion 301 of the extension portion 31 of the fastening tape 30. In the fastening tape 30, the fixed portion 32 is sandwiched between the side sheet 26 and the exterior sheet 24, and the extension portion 31 is exposed to the outside. Therefore, by disposing the insect repellent fragrance 40 on the extension portion 31 rather than the fixed portion 32, the insect repellent fragrance 40 is more easily released to the outside of the diaper 1, thereby enhancing the insect repellent effect.

[0060] 5, the non-skin side portion 301 of the fastening tape 30 (extending portion 311) is a portion of the fastening tape 30 that is closer to the non-skin side than the middle position C in the thickness direction. Further, a portion of the fastening tape 30 closer to the skin than the intermediate position C in the thickness direction is defined as a skin side portion 302 of the fastening tape 30.

[0061] The closer the insect repellent fragrance 40 is placed on the non-skin side (outside) of the diaper 1, the more likely it is to be released to the outside of the diaper 1. Therefore, by placing the insect repellent fragrance 40 on the non-skin side portion 301 of the fastening tape 30 (extension portion 31), the insect repellent fragrance 40 is more likely to be released to the outside of the diaper 1, improving the insect repellent effect. In addition, the user of the diaper 1 can more easily recognize the scent of the insect repellent fragrance 40. As a result, the user can be given a sense of expectation regarding the insect repellent effect, and the user can more easily experience the insect repellent effect.

[0062] Here, the insect repellent fragrance 40 is disposed on the non-skin side portion 301 of the fastening tape 30, which means that a greater weight of the insect repellent fragrance 40 is disposed on the non-skin side portion 301 than on the skin side portion 302 of the fastening tape 30. Preferably, the insect repellent fragrance 40 is disposed only on the non-skin side portion 301 of the fastening tape 30.

[0063] In this way, when the insect repellent fragrance 40 is disposed on the non-skin side portion 301 of the extension portion 31 of the fastening tape 30, the hot melt adhesive A9 that bonds the hook material 33 to the skin side of the extension portion 31 of the fastening tape 30 should be a low odor adhesive LA (i.e., a hot melt adhesive containing a hydrogenated tackifier). This makes it possible to suppress the odor of the hot melt adhesive A9 that is applied to a position close to the insect repellent fragrance 40. This reduces the unpleasant odor of the hot melt adhesive mixed with the insect repellent fragrance 40.

[0064] In particular, in the diaper 1 of the first embodiment, as shown in Fig. 4, the area where the hot melt adhesive A9 that bonds the hook material 33 to the fastening tape 30 is disposed partially overlaps with the area where the insect repellent fragrance 40 is disposed in the thickness direction of the diaper 1. The odor of the hot melt adhesive that overlaps with the insect repellent fragrance 40 in the thickness direction of the diaper 1 is more likely to mix with that of the insect repellent fragrance 40. From this point of view, it is preferable that the hot melt adhesive A9 for adhering the hook member 33 is the low odor adhesive LA.

[0065] That is, when the diaper 1 is viewed in a plane in the thickness direction, the area where the insect repellent fragrance 40 is disposed preferably has a portion 401 (see FIG. 4) that overlaps with the area where the low odor adhesive LA is disposed. This makes it possible to suppress the odor of the hot melt adhesive that overlaps with the insect repellent fragrance 40 in the thickness direction and tends to mix with the scent of the insect repellent fragrance 40. This reduces the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the insect repellent fragrance.

[0066] As described above, when checking the relative positions of the insect repellent fragrance 40 and the low odor adhesive LA, it is advisable to check the relative positions of the diaper 1 in an unfolded and stretched state (the same applies below). In the case of a tape-type diaper as in this embodiment, it is advisable to check the relative positions of the diaper 1 in an unfolded and stretched state without wrinkles as shown in FIG. 1. The stretched state specifically means a state in which the diaper 1 is stretched until the dimensions of each material constituting the diaper 1 match or are close to the dimensions of the material alone in a state in which they are not affected by the elastic members. In addition, although not shown, in the case of a pants-type diaper, it is advisable to check the relative positions of the diaper 1 in an unfolded state with the left and right joints around the waist untied.

[0067] In the first embodiment, in the thickness direction of the diaper 1, the insect repellent fragrance 40 is disposed closer to the skin than the low odor adhesives A9, LA that bond the hook material 33 to the fastening tape 30. This allows the insect repellent fragrance 40 to be easily released to the outside of the diaper 1, enhancing the insect repellent effect. In addition, the user can easily recognize the scent of the insect repellent fragrance 40.

[0068] Furthermore, it is preferable to use the low odor adhesive LA not only for the hot melt adhesive A9 that bonds the hook material 33 but also for the hot melt adhesive applied to a position close to the insect repellent fragrance 40. For example, it is preferable to use the low odor adhesive LA for the hot melt adhesive A8 that fixes the fastening tape 30 to the side sheet 26 and the hot melt adhesive A4 that fixes the fastening tape 30 to the exterior sheet 24. By doing so, the odor of the hot melt adhesive and the insect repellent fragrance 40 are less likely to mix, and the unpleasant odor caused by their mixture is reduced.

[0069] It is also advisable to arrange for the weight of the low odor adhesive LA to be greater in the diaper 1 than that of the insect repellent fragrance 40. By using the low odor adhesive LA, the odor of the hot melt adhesive can be suppressed, making it unnecessary to increase the amount of the insect repellent fragrance to overcome the odor of the hot melt adhesive, thereby reducing costs. Furthermore, by using a larger amount of the hot melt adhesive in the diaper 1 as the low odor adhesive LA, the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the insect repellent fragrance can be further reduced.

[0070] 3A and 3B, all of the hot melt adhesives A1 to A9 that bond the multiple materials contained in the diaper 1 (i.e., all of the hot melt adhesives used in the diaper 1) are the low odor adhesive LA. In this case, the odor of the non-hydrogenated adhesive NA (i.e., a hot melt adhesive that does not contain a hydrogenated tackifier) ​​does not mix with the insect repellent fragrance 40, preventing the generation of an unpleasant odor.

[0071] However, the present invention is not limited to the above, and for example, as in the modified example shown in Figures 6A and 6B, some of the materials in the diaper 1 may be bonded with the low odor adhesive LA, and another part of the materials may be bonded with the non-hydrogenated adhesive NA. In this case, however, it is preferable that the weight of the low odor adhesive LA placed on the diaper 1 is greater than that of the non-hydrogenated adhesive NA. By using a larger amount of the hot melt adhesive in the diaper 1 as the low odor adhesive LA, the odor of the hot melt adhesive released to the outside of the diaper 1 can be suppressed, and the unpleasant odor resulting from a mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40 can be reduced.

[0072] In addition, the position of the low odor adhesive LA is not limited to a position close to the insect repellent fragrance 40. For example, the absorbent 21 of the diaper 1 is a relatively thick member. Therefore, the odor of the hot melt adhesives A1, A2 applied to the skin side of the absorbent 21 and the hot melt adhesive A3 applied inside the absorbent 21 is relatively unlikely to be released to the outside of the diaper 1. Therefore, it is preferable to use the low odor adhesive LA for the hot melt adhesive that bonds the absorbent 21 and the non-skin side material arranged on the non-skin side of the absorbent 21, and for the hot melt adhesive that bonds the non-skin side materials together.

[0073] Specifically, at least one, and preferably all, of the hot melt adhesive A4 that bonds the absorbent body 21 to the waist gather film 28 or the leakproof sheet 23, the hot melt adhesive A5 that bonds the waist gather film 28 to the leakproof sheet 23, the hot melt adhesive A6 that bonds the leakproof sheet 23 to the exterior sheet 24, and the hot melt adhesive A7 that bonds the exterior sheet 24 to the target tape 29 should be the low odor adhesive LA. This makes it possible to suppress the odor of the hot melt adhesive released to the outside of the diaper 1, and also reduces the unpleasant odor resulting from a mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40.

[0074] Furthermore, the leakproof sheet 23 has a relatively low degree of breathability, and the odor of the hot melt adhesive arranged on the skin side of the leakproof sheet 23 is unlikely to escape to the outside of the diaper 1. In other words, the odor of the hot melt adhesive A4 that bonds the absorbent 21 to the non-skin side material (the waist gather film 28 or the leakproof sheet 23) is unlikely to escape to the outside of the diaper 1. For this reason, it is preferable that at least a part of the hot melt adhesive that bonds the materials on the non-skin side of the absorbent 21 be the low odor adhesive LA. More preferably, the hot melt adhesives A6 and A7 arranged on the non-skin side of the leakproof sheet 23 should be the low odor adhesive LA.

[0075] In particular, the hot melt adhesive A6 disposed on the skin side of the exterior sheet 24 forming at least a part of the non-skin side (outer side) of the diaper 1 is located closer to the skin side and has a relatively large amount (area) disposed thereon, so that its odor is easily released to the outside. For this reason, it is preferable that the hot melt adhesive A6 be a low odor adhesive LA. This reduces the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40.

[0076] However, without being limited to the above, the hot melt adhesives A1, A2 applied closer to the skin than the absorbent body 21 and the hot melt adhesive A3 applied inside the absorbent body 21 may be the low odor adhesive LA. Although not shown, the hot melt adhesive for fixing the leg opening elastic members 15 and the leak preventing wall elastic members 16, the hot melt adhesive for forming the leak preventing wall using the side sheet 26, etc. may be the low odor adhesive LA.

[0077] Even when the insect repellent fragrance 40 is disposed on the fastening tape 30, the hot melt adhesive around the fastening tape 30 may be a non-hydrogenated adhesive NA, as shown in Figs. 6A and 6B. That is, the hot melt adhesive A9 that bonds the hook material 33 to the fastening tape 30 and the hot melt adhesives A8 and A4 that bond the fastening tape 30 to the side sheet 26 and the outer sheet 24 may be non-hydrogenated adhesive NA. In this case, the low odor adhesive LA may be used in a part of the diaper 1. In particular, the hot melt adhesive disposed on the non-skin side (outside) of the diaper 1 and the hot melt adhesive applied over a wide area (for example, the hot melt adhesive A6 applied to the outer sheet 24) may be the low odor adhesive LA. In this case, the unpleasant odor of the hot melt adhesive mixed with the insect repellent fragrance 40 is reduced.

[0078] It is preferable to confirm that the low odor adhesive LA is used in the diaper 1, confirm the materials and areas where the low odor adhesive LA is placed, and compare the weights of the low odor adhesive LA and the non-hydrogenated adhesive NA by using a known method. For example, the materials and areas where the hot melt adhesive (LA, NA) is placed can be visually confirmed after separating each material from the diaper 1 using a cold spray or the like, or by scattering colored fine particles such as bamboo charcoal or cocoa powder on each material, brushing off the particles, and confirming the areas where the particles are attached. In addition, for example, whether the adhesive is the low odor adhesive LA or the non-hydrogenated adhesive NA and their weights can be confirmed by placing the material where the hot melt adhesive (LA, NA) is placed in a container, sealing it, and analyzing the components in the container using a gas chromatograph (GC-MS). In addition, for example, the weight of the hot melt adhesive (LA, NA) can be calculated from the difference in weight of the material (in a dry state) before and after the hot melt adhesive placed in the material is dissolved in toluene.

[0079] Similarly, the materials and areas in which the insect repellent fragrance 40 is disposed may be confirmed by a known method. For example, each material separated from the diaper 1 may be subjected to a component analysis using a gas chromatograph (GC-MS) to confirm whether the material contains the insect repellent fragrance 40 and the weight of the insect repellent fragrance 40. In addition, when the insect repellent fragrance 40 is contained in a microcapsule, the material and areas in which the insect repellent fragrance 40 is disposed may be confirmed by observing the surface or cross section of the material with an electron microscope, for example.

[0080] In addition, the insect repellent fragrance 40 is preferably contained in a microcapsule (membrane material). Examples of microcapsules include those that break down due to physical pressure (impact, friction) to release the insect repellent fragrance 40 inside. Specific examples include capsules (membrane materials) made of urethane resin, gelatin, gelatin-gum arabic, melamine resin, urea-formaldehyde resin, etc., either alone or in combination.

[0081] By containing the insect repellent fragrance 40 in microcapsules, it is possible to prevent the insect repellent fragrance 40 from volatilizing before the diaper 1 is worn, and the insect repellent function can be exerted while the diaper 1 is worn. In addition, since the multiple microcapsules are broken in sequence while the diaper 1 is worn, and the insect repellent fragrance 40 is released, the duration of the insect repellent function is increased. In particular, in the diaper 1 of the first embodiment, the insect repellent fragrance 40 is disposed on the fastening tape 30. Therefore, since the fastening tape 30 is gripped when the diaper 1 is put on, the microcapsules are easily broken, and the insect repellent function is reliably exerted while the diaper 1 is worn. However, the above is not limited, and the insect repellent fragrance 40 does not have to be contained in a microcapsule.

[0082] As described above, in the diaper 1 of the first embodiment, the insect repellent fragrance 40 is disposed on the non-skin side portion 301 of the extension portion 31 of the fastening tape 30. Furthermore, it is preferable that the weight of the insect repellent fragrance 40 (microcapsules) embedded inside the fastening tape 30 is greater than the weight of the insect repellent fragrance 40 located on the non-skin side 30b of the fastening tape 30. This prevents the microcapsules from easily collapsing and releasing the insect repellent fragrance 40, thereby improving the durability of the insect repellent effect. The non-skin side 30b of the fastening tape 30 refers to the surface having the most protruding fiber of the nonwoven fabric fiber layer constituting the fastening tape 30 as its apex, and the part inside this is defined as the interior of the fastening tape 30.

[0083] To this end, it is advisable to do the following. First, the average particle size (e.g., 5 to 15 μm) of the insect repellent fragrance 40 (microcapsules) is made smaller than the average fiber diameter (e.g., 20 μm) of the fastening tape 30. Specifically, the weight of the insect repellent fragrance 40 having a particle size smaller than the average fiber diameter (20 μm) of the fastening tape 30 is made greater than the weight of the insect repellent fragrance 40 having a particle size larger than the average fiber diameter (20 μm) of the fastening tape 30. This makes it easier for the insect repellent fragrance 40 to penetrate into the fastening tape 30, improving the durability of the insect repellent effect.

[0084] However, if the particle size of the insect repellent fragrance 40 is too small, static electricity is easily generated, and the insect repellent fragrance 40 remains on the non-skin side surface 30b of the fastening tape 30 without rolling, making it difficult to penetrate into the fastening tape 30. For this reason, the particle size of the microcapsules containing the insect repellent fragrance 40 is preferably 0.1 μm or more (preferably 0.5 μm or more).

[0085] To place the insect repellent fragrance 40 on the non-skin side portion 301 of the fastening tape 30, a liquid in which the insect repellent fragrance 40 contained in microcapsules is dispersed may be applied to the non-skin side portion 30b of the fastening tape 30. The application method may be a well-known method such as a spray method, a roller coating method, or a brush coating method.

[0086] Specifically, in this embodiment, an aqueous dispersion containing PVA (polyvinyl alcohol) having an adhesive function and microcapsules containing an insect repellent fragrance 40 dispersed in water is applied to the non-skin side 30b of the fastening tape 30. In order to apply the aqueous dispersion uniformly to the fastening tape 30, it is recommended to add a hydrophilic agent (0.3%, polyoxyethylene sorbitan monooleate) to the aqueous dispersion. In this case, it is also recommended to add an antifoaming agent (0.2%, polyoxyethylene polyoxypropylene glycol (block copolymer)) in addition to the hydrophilic agent.

[0087] It is also advisable to use a hydrophobic nonwoven fabric or a nonwoven fabric with a relatively high basis weight for the fastening tape 30. In this way, the aqueous dispersion does not move much within the fastening tape 30, and the microcapsules (insect repellent fragrance 40) tend to remain on the non-skin side portion 301 of the fastening tape 30.

[0088] Furthermore, when the insect repellent fragrance 40 is placed on the fastening tape 30, it is not limited to being placed on the non-skin side portion 301 of the extending portion 31 of the fastening tape 30 as in this embodiment. For example, the insect repellent fragrance 40 may be placed on the skin side portion 302 of the extending portion 31 of the fastening tape 30, or may be placed over the entire thickness of the fastening tape 30. Also, the insect repellent fragrance 40 may be placed on the fixed portion 32 of the fastening tape 30.

[0089] The method of disposing the insect repellent fragrance 40 on the diaper 1 is not limited to the method of applying a dispersion of the insect repellent fragrance 40 contained in microcapsules to the material as described above. For example, a solution of the insect repellent fragrance 40 not contained in microcapsules may be applied to the material. Also, for example, the material on which the insect repellent fragrance 40 is to be disposed may be impregnated with a solution of the insect repellent fragrance 40, or the insect repellent fragrance 40 may be kneaded into the fibers constituting the material. Also, the insect repellent fragrance 40 may be kneaded into wax and disposed on the material, so that the insect repellent fragrance 40 is released when the user rubs the material or when heat is applied. Also, when most of the insect repellent fragrance 40 is located on the surface of the material without penetrating into the material, the area where the insect repellent fragrance 40 is disposed may be covered with tape, and the user may peel off the tape when using the diaper 1. By doing so, it is possible to prevent the insect repellent fragrance from volatilizing.

[0090] Next, the insect repellent fragrance 40 will be described. The insect repellent fragrance 40 is not particularly limited as long as it is a fragrance that has an insect repellent effect, but it is preferable that the insect repellent fragrance 40 contains a plurality of fragrances with different boiling points. A high-boiling-point fragrance takes time to volatilize. Therefore, the high-boiling-point fragrance can increase the duration of the insect repellent effect. On the other hand, a low-boiling-point fragrance volatilizes relatively quickly. Therefore, the fragrance of the insect repellent fragrance 40 can be recognized (appealed) to the user at an early stage, that is, when the user takes the diaper 1 out of the package or when putting on the diaper 1. As a result, the user can be given a sense of expectation for the insect repellent effect, and the user can easily feel the insect repellent effect.

[0091] A specific example of an insect repellent fragrance 40 containing multiple fragrances with different boiling points is one containing at least one fragrance selected from group (A) having a boiling point of 200°C or higher and 220°C or lower, and one fragrance selected from group (B) having a boiling point of 150°C or higher and lower than 200°C.

[0092] The flavorings in group (A) are citronellal, menthol, α-terpineol, linalyl acetate, isopulegol, ethyl linalool, terpinyl acetate, geranyl formate, menthone, borneol, and camphor.

[0093] The fragrances in group (B) are menthane, camphene, tetrahydrolinalool, dihydromyrcenol, ocimenol, ocimene, myrcene, α-pinene, β-pinene, α-phellandrene, α-terpinene, γ-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3,5,5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2,4-hexadiene-1-ol, 1-octen-3-ol, 2,6-nonadienol, tetrahydromugol, 4-thuyanol, n-heptanal, n-octanal, 3,5,5-trimethylhexanal, cis-3-hexenal, 2, 4-Hexadienal, 2,6-Nonadienal, heptanal dimethyl acetal, octanal dimethyl acetal, citral dimethyl acetal, 2-heptanone, 2-octanone, 3-octanone, 2-nonanone, 3-nonanone, methylheptenone, fenchone, acetylfuran, linalool oxide, menthofuran, 1,8-cineole, 1,4-cineole, 2,2,6-trimethyl-6-vinyltetrahydropyran, cis-3-hexenyl formate, prenyl acetate, hexyl acetate, cis-3-hexenyl acetate, trans-2-hexenyl acetate, heptyl acetate, hexyl propionate, cis-3-hexenyl butyrate, cis-3-hexenyl isobutyrate, ethyl 2-methylvalerate, ethyl heptanoate, and allyl hexanoate. In addition, the insect repellent fragrance 40 contains a solvent (for example, isopropyl myristate) in addition to the fragrance.

[0094] Furthermore, it is preferable that the weight ratio of the (A) group in the components of the insect repellent fragrance 40 is higher than the weight ratio of the (B) group. In this way, the insect repellent effect is obtained by the high weight ratio of the high boiling point fragrance ((A) group fragrance). In addition, by adding a low boiling point fragrance ((B) group fragrance) as an auxiliary, the insect repellent fragrance 40 can be recognized by the user from an early stage, and the user can be given a sense of expectation for the insect repellent effect.

[0095] In addition, the fragrances in Group (A), Group (B), and Group (C) described below are all allergen-free substances. Therefore, users can be assured that they are not allergy-prone. Furthermore, the fragrances in Group (A) and Group (B) do not contain any of the following 26 fragrances that are required to be labeled as allergens under the EU (European Union) Cosmetics Directive (76 / 768 / EEC). Therefore, users can be assured that they are not allergy-prone.

[0096] The 26 types of fragrances are α-isomethyl ionone, amyl cinnamyl aldehyde, amyl cinnamyl alcohol, anise alcohol, benzyl alcohol, benzyl benzoate, benzyl cinnamate, benzyl salicylate, butyl methyl propional, cinnamaldehyde, cinnamyl alcohol, citral, citronellol, coumarin, eugenol, farnesol, geraniol, hexyl cinnamal, hydroxycitronellal, hydroxyisohexyl 3-cyclohexene carboxaldehyde, isoeugenol, limonene, linalool, methyl 2-octynoate, hornwort extract, and evernia furfurracea extract. Here, the term "not included" for these fragrances means that the fragrances are substantially not included, and does not mean that the fragrances are completely not included (not present at all). If the ratio of the fragrance in question to the insect repellent fragrance (solvent + fragrance) is 1% or less, it can be said that it is essentially free of such fragrance.

[0097] Furthermore, none of the fragrances in group (A), group (B), and group (C) described below impair the adhesive performance of the hot melt adhesive. Therefore, the fragrance that volatilizes in the package (wrapping material) before use of the diaper 1 acts on the hot melt adhesive, preventing the diaper 1 from peeling off, etc. This makes it possible to properly maintain the performance of the diaper 1.

[0098] Insect repellent fragrances that impair the adhesive performance of hot melt adhesives include limonene, phenylacetaldehyde, methyl salicylate, thymol, methylisoeugenol, coumarin, β-phenylethyl alcohol, cymene, eugenol, carvacrol, phenylethyl acetate, safrole, benzyl acetate, styrallyl acetate, anisyl acetate, cinnamyl acetate, cuminaldehyde, diphenyl oxide, and cinnamyl formate. None of these are included in the fragrances of group (A) and group (B) (the definition of "not included" is the same as above).

[0099] Furthermore, it is preferable that the insect repellent fragrance 40 contains at least one fragrance selected from group (C) having a boiling point of more than 220° C. and not more than 270° C., in addition to the high-boiling fragrance (fragrance in group (A)) and the low-boiling fragrance (fragrance in group (B)). The fragrances in group (C) are isobornyl acetate, p-menthane-3,8-diol, 2-(tert-butyl)cyclohexyl acetate, dihydroterpinyl acetate, nerol, 4-tert-butylcyclohexyl acetate, citronellyl acetate, neryl acetate, geranyl acetate, ethyl linalyl acetate, tricyclodecenyl acetate, bornyl acetate, β-caryophyllene, cis-jasmone, L-carvone, nopyr acetate, pulegone, and allyl octanoate. In such a case, a fragrance having a higher boiling point is added to the low boiling point fragrance and the high boiling point fragrance, so that it is possible to enhance the durability of the insect repellent effect.

[0100] The insect repellent fragrance 40 according to this embodiment is as follows. That is, 50% (weight ratio, the same below) of the solvent isopropyl myristate is mixed with 30-40% citronellal, 10-15% 1.8-cineole, 10-15% isobornyl acetate, and less than 1% of other fragrances as fragrances. The "other fragrances" amounting to less than 1% includes at least one fragrance selected from group (B). For example, menthane is included.

[0101] Furthermore, the insect repellent fragrance 40 is not limited to the above, and may be, for example, one that contains only fragrances from group (A), one that contains at least one fragrance from group (A) and one fragrance from group (C), or one that contains only fragrances from group (C).

[0102] Fragrances can be broadly divided into natural fragrances and synthetic fragrances. Synthetic fragrances are fragrances that are chemically synthesized and do not contain various fragrance ingredients. Synthetic fragrances include isolated fragrances, fully synthetic fragrances, semi-synthetic fragrances, and biosynthetic fragrances. For example, by using only synthetic fragrances, it is possible to appropriately avoid the inclusion of substances that are not desired to be included in the insect repellent fragrance 40 (for example, the above-mentioned allergens and hot melt adhesive inhibitors).

[0103] However, without being limited to the above, the insect repellent fragrance 40 may contain a natural fragrance. Examples of natural fragrances include natural essential oils, which are fragrances directly extracted from natural plants. Specifically, the insect repellent fragrance 40 may contain a fragrance derived from any of lemongrass, citronella, and lemon eucalyptus. In this way, ingredients with insect repellent effects (e.g., citronellal, citral, geraniol, geranyl acetate, isopulegol, citronellol, etc.) are imparted to the diaper 1. In addition, natural essential oils are preferable because they are relatively easy to obtain and contain many compounds that are active ingredients in insect repellents.

[0104] ===Second embodiment==== Figures 7A and 7B are explanatory diagrams of hot melt adhesives A1-A9 used in the diaper 1 of the second embodiment. Figure 7A is a cross-sectional view of the ventral side of the diaper 1, and Figure 7B is a cross-sectional view of the dorsal side of the diaper 1. Figure 8 is an exploded perspective view of the periphery of the exterior sheet 24. Below, the differences between the diaper 1 of the second embodiment and the diaper 1 of the first embodiment will be mainly described.

[0105] In the diaper 1 of the second embodiment, an insect repellent fragrance 40 is disposed on the exterior sheet 24. The leak-proof sheet 23, which is a liquid-impermeable sheet, has a lower air permeability than a liquid-permeable sheet (for example, the exterior sheet 24 made of a nonwoven fabric), and the insect repellent fragrance 40 is less likely to pass through the leak-proof sheet 23. For this reason, it is preferable that the insect repellent fragrance 40 is disposed closer to the skin than the leak-proof sheet 23 in the thickness direction of the diaper 1. That is, it is preferable to dispose the insect repellent fragrance 40 on the exterior sheet 24 as in this embodiment, or to dispose the insect repellent fragrance 40 on a target tape 29 as shown in FIG. 9A described later. This makes it easier for the scent of the insect repellent fragrance 40 to be released to the outside of the diaper 1, enhancing the insect repellent effect. In addition, the user of the diaper 1 can easily recognize the scent of the insect repellent fragrance 40.

[0106] Furthermore, when the insect repellent fragrance 40 is placed on the fastening tape 30 as in the diaper 1 of the first embodiment, the insect repellent fragrance 40 is placed on the abdominal side of the wearer. On the other hand, since the outer sheet 24 forms the outer shape of the diaper 1, the insect repellent fragrance 40 can be placed not only on the abdominal side of the wearer but also on the back side, around the legs, or any other position on the diaper 1 that corresponds to the wearer's desired part. Furthermore, the insect repellent fragrance 40 can be placed over a wide area of ​​the diaper 1. Note that in FIG. 9, the region where the insect repellent fragrance 40 is placed is illustrated as being the center in the width direction of the outer sheet 24 and extending from one end to the other end in the longitudinal direction of the outer sheet 24, but is not limited thereto.

[0107] The insect repellent fragrance 40 may be disposed over the entire thickness of the outer sheet 24, or may be disposed on the skin side or non-skin side of the outer sheet 24. Specifically, the insect repellent fragrance 40 may be applied from the skin side of the outer sheet 24, or more insect repellent fragrance 40 may be disposed on the skin side of the outer sheet 24 than the intermediate position in the thickness direction. In this case, the persistence of the insect repellent fragrance 40 can be increased. Alternatively, the insect repellent fragrance 40 may be applied from the non-skin side of the outer sheet 24, or more insect repellent fragrance 40 may be disposed on the non-skin side of the outer sheet 24 than the intermediate position in the thickness direction. In this case, the insect repellent fragrance 40 is easily released to the outside of the diaper 1, the insect repellent effect is enhanced, and the user can easily recognize the scent of the insect repellent fragrance 40.

[0108] As shown in FIG. 7A, the exterior sheet 24 has a portion covered by the target tape 29 from the non-skin side, and a portion that becomes the outermost layer (non-skin side) of the diaper 1, as shown in FIG. 7B. When the insect repellent fragrance 40 is disposed in the portion of the exterior sheet 24 inside the target tape 29, the target tape 29 is preferably a breathable sheet (e.g., nonwoven fabric). Therefore, the insect repellent fragrance 40 disposed in the portion of the exterior sheet 24 that overlaps with the target tape 29 (FIG. 7A) can be prevented from volatilizing quickly compared to the insect repellent fragrance 40 disposed in the portion that does not overlap. On the other hand, the insect repellent fragrance 40 disposed in the portion of the exterior sheet 24 that becomes the outermost layer of the diaper 1 (FIG. 7B) is easily released to the outside of the diaper 1, which enhances the insect repellent effect and makes it easier for the user to recognize the scent of the insect repellent fragrance 40.

[0109] When the insect repellent fragrance 40 is disposed on the exterior sheet 24, it is preferable that the hot melt adhesive A7 that bonds the target tape 29 to the exterior sheet 24 is a low odor adhesive LA. In other words, the hot melt adhesive A7 that is disposed on the non-skin side of the insect repellent fragrance 40 in the thickness direction of the diaper 1 should be a low odor adhesive LA.

[0110] This makes it possible to suppress the odor of the hot melt adhesive A7 that is disposed on the non-skin side of the diaper 1 and that tends to release its odor to the outside of the diaper 1. This reduces the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40.

[0111] As described in the first embodiment, it is preferable to use a larger amount of the hot melt adhesive LA in the diaper 1. Specifically, it is preferable to use a hot melt adhesive having a weight greater than the weight of the insect repellent fragrance 40 as the low odor adhesive LA, or to use a weight of the low odor adhesive LA greater than the weight of the non-hydrogenated adhesive NA. In this way, the unpleasant odor resulting from the mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40 is further reduced.

[0112] Among them, it is preferable to use a low odor adhesive LA for the hot melt adhesive placed on the non-skin side of the absorbent body 21, since odor is likely to be released to the outside of the diaper 1. It is also preferable to use a low odor adhesive for the hot melt adhesive that overlaps in the thickness direction with the insect repellent fragrance 24 placed on the exterior sheet 24.

[0113] 7A and 7B, at least one of, and preferably all of, the hot melt adhesive A4 that bonds the absorbent body 21 to the waist gather film 28 or the leakproof sheet 23, the hot melt adhesive A5 that bonds the waist gather film 28 to the leakproof sheet 23, the hot melt adhesive A6 that bonds the leakproof sheet 23 to the exterior sheet 24, and the hot melt adhesive A7 that bonds the exterior sheet 24 to the target tape 29 should be the low odor adhesive LA. This can suppress the odor of the hot melt adhesive released to the outside of the diaper 1, and also reduces the unpleasant odor resulting from a mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40.

[0114] In particular, as shown in Fig. 8, it is advisable to use a low-odor adhesive LA for the hot melt adhesive placed near the insect repellent fragrance 40 (A6 bonding the leakproof sheet 23 and the exterior sheet 24, and A7 bonding the exterior sheet 24 and the target tape 29). This makes it difficult for the odor of the hot melt adhesive to mix with the insect repellent fragrance 40, reducing the unpleasant odor that results from their mixture.

[0115] However, it is not limited to the above, and it is sufficient that at least some of the materials of the diaper 1 are adhered with the low odor adhesive LA. In this way, the unpleasant odor of the hot melt adhesive mixed with the insect repellent fragrance 40 is reduced.

[0116] ===Other embodiments=== Although the embodiment of the present invention has been described above, the above embodiment is intended to facilitate understanding of the present invention and is not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents thereof.

[0117] 9A and 9B are explanatory diagrams of hot melt adhesives A1 to A9 used in the diaper 1 of other embodiments. In the above embodiment, the case where the insect repellent fragrance 40 is fixed to the fastening tape 30 or the exterior sheet 24 is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 9A and FIG. 9B, the insect repellent fragrance 40 may be disposed on the target tape 29. In this case, it is also preferable that at least a part of the multiple materials contained in the diaper 1 is adhered with the low odor adhesive LA. In this way, the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40 is reduced.

[0118] In this case, the target tape 29 forms the outermost layer (non-skin side) of the diaper 1, so that the insect repellent fragrance 40 is disposed closer to the non-skin side than the hot melt adhesive (low odor adhesive LA) in the thickness direction. Therefore, the insect repellent fragrance 40 is easily released to the outside of the diaper 1, increasing the insect repellent effect and making it easier for the user to recognize the insect repellent fragrance 40.

[0119] Furthermore, when the diaper 1 is worn, the fastening tape 30 is engaged with the target tape 29. For this reason, it is advisable to use a low odor adhesive LA as the hot melt adhesive around the fastening tape 30 (for example, A9 that bonds the hook material 33 to the fastening tape 30). This makes it possible to suppress the odor of the hot melt adhesive placed near the insect repellent fragrance 40, and reduces the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the insect repellent fragrance 40. [Explanation of symbols]

[0120] 1 Diapers (absorbent articles), 3 ventral waist, 5 crotch, 7 dorsal waist, 15 leg elastic member, 16 leak-proof wall elastic member, 21 absorbent body, 22 top sheet, 23 Leak-proof sheet (liquid-impermeable sheet, material not on the skin side), 24 Exterior sheet (non-skin side material), 26 Side sheet, 28 Waist gather film (non-skin side material), 29 Target tape (non-skin side material), 30 fastening tape, 31 extension, 32 fixing part, 33 hook material, 40 Insect repellent fragrances, A1~A9 Hot melt adhesives, LA low odor adhesive (hot melt adhesive containing hydrogenated tackifier), NA Non-hydrogenated adhesive (hot melt adhesive that does not contain hydrogenated tackifiers)

Claims

1. An absorbent article having a plurality of materials and having an insect repellent fragrance disposed therein, An absorbent article, characterized in that at least a portion of the plurality of materials are adhered by a hot melt adhesive containing a hydrogenated tackifier.

2. The absorbent article according to claim 1, the plurality of materials include an absorbent body and a non-skin side material arranged on a side closer to the skin than the absorbent body in a thickness direction of the absorbent article, An absorbent article, wherein at least a portion of the hot melt adhesive that bonds the non-skin side materials together contains the hydrogenated tackifier.

3. The absorbent article according to claim 1 or 2, An absorbent article characterized in that, when the absorbent article is viewed in a plane in the thickness direction, the area in which the insect repellent fragrance is disposed has a portion that overlaps with the area in which the hot melt adhesive containing the hydrogenated tackifier is disposed.

4. The absorbent article according to any one of claims 1 to 3, An absorbent article, characterized in that a hot melt adhesive containing the hydrogenated tackifier is placed on the absorbent article in a weight amount greater than that of the insect repellent fragrance.

5. The absorbent article according to any one of claims 1 to 4, some of the plurality of materials are bonded by a hot melt adhesive containing the hydrogenated tackifier; Another portion of the plurality of materials is bonded by the hot melt adhesive that does not contain the hydrogenated tackifier, An absorbent article, characterized in that a hot melt adhesive containing the hydrogenated tackifier is placed on the absorbent article at a greater weight than a hot melt adhesive not containing the hydrogenated tackifier.

6. The absorbent article according to any one of claims 1 to 4, An absorbent article, characterized in that all of the hot melt adhesives that bond the plurality of materials together are hot melt adhesives that contain the hydrogenated tackifier.

7. The absorbent article according to any one of claims 1 to 6, An absorbent article, characterized in that the hot melt adhesive arranged on the non-skin side of the insect repellent fragrance in the thickness direction of the absorbent article contains the hydrogenated tackifier.

8. The absorbent article according to any one of claims 1 to 6, An absorbent article, characterized in that in the thickness direction of the absorbent article, the insect repellent fragrance is disposed closer to the non-skin side than the hot melt adhesive containing the hydrogenated tackifier.

9. The absorbent article according to any one of claims 1 to 6, having a vertical direction and a horizontal direction, A pair of fastening tapes extending from a back waist portion that is placed against a back side of a wearer to both outer sides in the lateral direction are provided, the fastening tape has a fixing portion fixed to the back waist portion and an extension portion extending from the back waist portion, and is provided with a hook member that engages with the abdominal waist portion that is placed against the abdominal portion of a wearer; The insect repellent fragrance is disposed on a non-skin side of the extended portion of the fastening tape, An absorbent article, characterized in that a hot melt adhesive disposed on the skin side of an exterior sheet forming at least a part of the non-skin side of the absorbent article contains the hydrogenated tackifier.

10. An absorbent article according to any one of claims 1 to 9, The insect repellent fragrance is an absorbent article characterized in that it contains a fragrance derived from any one of lemongrass, citronella, and lemon eucalyptus.

11. An absorbent article according to any one of claims 1 to 10, The insect repellent fragrance comprises a plurality of fragrances having different boiling points.

12. 12. The absorbent article of claim 11, The insect repellent fragrance comprises at least one fragrance selected from group (A) having a boiling point of 200°C or higher and 220°C or lower and at least one fragrance selected from group (B) having a boiling point of 150°C or higher and lower than 200°C, and the weight ratio of group (A) in the components is higher than the weight ratio of group (B). (A) group: citronellal, menthol, α-terpineol, linalyl acetate, isopulegol, ethyl linalool, terpinyl acetate, geranyl formate, menthone, borneol, camphor, (B) group: Menthane, camphene, tetrahydrolinalool, dihydromyrcenol, ocimenol, ocimene, myrcene, α-pinene, β-pinene, α-phellandrene, α-terpinene, γ-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3,5,5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2,4-hexadiene-1-ol, 1-octen-3-ol, 2,6-nonadienol, tetrahydromugol, 4-thuyanol, n-heptanal, n-octanal, 3,5,5-trimethylhexanal, cis-3-hexenal, 2, 4-Hexadienal, 2,6-Nonadienal, heptanal dimethyl acetal, octanal dimethyl acetal, citral dimethyl acetal, 2-heptanone, 2-octanone, 3-octanone, 2-nonanone, 3-nonanone, methylheptenone, fenchone, acetylfuran, linalool oxide, menthofuran, 1,8-cineole, 1,4-cineole, 2,2,6-trimethyl-6-vinyltetrahydropyran, cis-3-hexenyl formate, prenyl acetate, hexyl acetate, cis-3-hexenyl acetate, trans-2-hexenyl acetate, heptyl acetate, hexyl propionate, cis-3-hexenyl butyrate, cis-3-hexenyl isobutyrate, ethyl 2-methylvalerate, ethyl heptanoate, allyl hexanoate

13. An absorbent article according to any one of claims 1 to 12, The plurality of materials include an absorbent body and a liquid-impermeable sheet arranged on a side closer to the skin than the absorbent body in a thickness direction of the absorbent article, An absorbent article, characterized in that, in the thickness direction, the insect repellent fragrance is disposed closer to the skin than the liquid-impermeable sheet.

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