CN116113388A - Absorbent article - Google Patents

Abstract

An absorbent article (1) in which an insect fragrance (40) is placed and which has a plurality of materials, the absorbent article (1) being characterized in that at least some of the plurality of materials are adhered by a hot melt adhesive (LA) comprising a hydrogenated pressure sensitive tackifier.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

Patent document 1 discloses an absorbent article to which microencapsulated natural plant extracts exhibiting insect-repellent effects are applied. Some natural plants (e.g., cinnamon, rosemary, lavender, peppermint, eucalyptus, etc.) contain odor components that have repellent effects, and application of such extracts of natural plants to absorbent articles can keep insects away from the absorbent articles.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2012-522618

Disclosure of Invention

Problems to be solved by the invention

The absorbent article is formed of a plurality of members such as a liquid-impermeable back sheet, a liquid-permeable front sheet, and an absorbent core. These components are typically joined to one another with a hot melt adhesive. Some tackifiers included in hot melt adhesives have an undesirable odor. In an absorbent article using a hot melt adhesive containing such a tackifier, the smell of the hot melt adhesive is released to the outside. Therefore, if the fragrance having the insect-repellent effect is applied to an absorbent article having an odor of a hot melt adhesive, these fragrances are mixed, and there is a risk that the user of the absorbent article feels an unpleasant odor.

The present invention has been made in view of the above problems, and an aspect of the present invention is to provide an absorbent article having an insect repellent function and reduced unpleasant odor.

Means for solving the problems

The main aspect of the present invention for achieving the above aspect is an absorbent article comprising: a plurality of members; and an insect fragrance disposed in the absorbent article, at least some of the plurality of components being adhered with a hot melt adhesive comprising a hydrogenated tackifier.

Other features of the invention will become apparent upon review of the description and upon reference to the drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, an absorbent article having an insect repellent function and reduced unpleasant odor can be provided.

Drawings

Fig. 1 is a plan view of a tape type disposable diaper 1 in an unfolded and elongated state when seen from the skin side.

Fig. 2A is a schematic cross-sectional view of the abdomen-side waist part 3 of the diaper 1, fig. 2B is a schematic cross-sectional view of the crotch part 5 of the diaper 1, and fig. 2C is a schematic cross-sectional view of the back-side waist part 7 of the diaper 1.

Fig. 3A and 3B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to the first embodiment.

Fig. 4 is an exploded perspective view of the periphery of the fastening tape 30.

Fig. 5 is a view schematically showing the arrangement of the insect fragrance 40 in the cross section of the fastening tape 30.

Fig. 6A and 6B are diagrams showing a modification of the diaper 1 according to the first embodiment.

Fig. 7A and 7B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to the second embodiment.

Fig. 8 is an exploded perspective view of the periphery of the exterior sheet 24.

Fig. 9A and 9B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to other embodiments.

Detailed Description

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

The absorbent article comprises: a plurality of members; and an insect fragrance disposed in the absorbent article, at least some of the plurality of components being adhered with a hot melt adhesive comprising a hydrogenated tackifier.

According to the above-described absorbent article, the fragrance for disinsection provides an insect repellent function, and at the same time, the hot-melt adhesive containing the hydrogenated tackifier can suppress odor released from the hot-melt adhesive to the outside of the absorbent article. Thus, in the absorbent article, unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance for deinsectization is reduced.

In such an absorbent article, the plurality of members include an absorber and a non-skin-side member, the non-skin-side member being a member disposed on a non-skin side with respect to the absorber in a thickness direction of the absorbent article, and at least some of the hot melt adhesive for adhering the non-skin-side members to each other includes the hydrogenated tackifier.

According to the above absorbent article, although the odor of the hot melt adhesive disposed on the non-skin side with respect to the absorber is easily released to the outside, the odor is suppressed and also the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance for disinsection is reduced.

In such an absorbent article, when the absorbent article is viewed in a plan view in a thickness direction, the region where the insect-repellent fragrance is disposed has a portion overlapping with the region where the hot-melt adhesive containing the hydrogenated tackifier is disposed.

According to the above absorbent article, it suppresses the odor of the hot-melt adhesive that is liable to be mixed with the fragrance of the fragrance for deinsectization, and also reduces the unpleasant odor caused by the mixing of the odor of the hot-melt adhesive and the fragrance for deinsectization.

In such an absorbent article, the weight of the hot melt adhesive containing the hydrogenated tackifier disposed in the absorbent article is greater than the weight of the insect-repellent fragrance disposed in the absorbent article.

According to the absorbent article described above, the odor of the hot melt adhesive can be suppressed by using the hot melt adhesive containing the hydrogenated tackifier. Thus, there is no need to increase the amount of the fragrance for disinsection to overcome the smell of the hot melt adhesive, and cost reduction can be achieved.

In such an absorbent article, some of the plurality of members are adhered with the hot melt adhesive containing the hydrogenated tackifier, others of the plurality of members are adhered with the hot melt adhesive containing no hydrogenated tackifier, and the weight of the hot melt adhesive containing a hydrogenated tackifier disposed in the absorbent article is greater than the weight of the hot melt adhesive containing no hydrogenated tackifier disposed in the absorbent article.

According to the absorbent article described above, the odor released from the hot-melt adhesive to the outside of the absorbent article can be further suppressed, and the unpleasant odor caused by the mixing of the odor of the hot-melt adhesive with the fragrance for deinsectization can be reduced.

In such an absorbent article, the hot melt adhesive used for adhering the plurality of members is all the hot melt adhesive containing the hydrogenated tackifier.

According to the absorbent article described above, the strong odor of the hot melt adhesive containing no hydrogenated tackifier is not mixed with the fragrance for deinsectization, so that generation of unpleasant odor can be prevented.

In such an absorbent article, the hydrogenated tackifier is contained in a hot melt adhesive disposed on a non-skin side of the insect-repellent perfume in a thickness direction of the absorbent article.

According to the above absorbent article, although the smell of the hot melt adhesive disposed on the non-skin side is easily released to the outside, the smell is suppressed, and also the unpleasant smell caused by the mixture of the smell of the hot melt adhesive and the fragrance for disinsection is reduced. Further, since the fragrance for deinsectization is disposed on the skin side with respect to the member serving as the outermost layer of the absorbent article, the durability of the fragrance for deinsectization is enhanced.

In this absorbent article, the insect-repellent fragrance is disposed on the non-skin side with respect to the hot-melt adhesive containing the hydrogenated tackifier in the thickness direction of the absorbent article.

According to the above-described absorbent article, unpleasant odor caused by mixing of the odor of the hot melt adhesive and the fragrance for deinsectization is reduced, and at the same time, the insect repellent effect is enhanced because the fragrance for deinsectization is disposed on the member serving as the outermost layer of the absorbent article.

In such an absorbent article, the absorbent article has a longitudinal direction and a lateral direction, the absorbent article further includes a pair of fastening tapes extending from a back side waistline portion to be applied to a back side portion of a wearer to both outer sides in the lateral direction, respectively, the fastening tapes have a fixing portion fixed to the back side waistline portion and an extending portion extending from the back side waistline portion, the fastening tapes include a hook member engaged with an abdomen side waistline portion to be applied to an abdomen side portion of the wearer, the fragrance for deinsectization is disposed in a non-skin side portion of the extending portion of the fastening tapes, and the hot melt adhesive disposed on a skin side surface of an outer sheet forming at least a part of a non-skin side surface of the absorbent article contains the hydrogenated tackifier.

According to the absorbent article described above, since the insect-repellent perfume is disposed in the extension portion of the fastening tape, the insect-repellent perfume is more easily released to the outside, thereby enhancing the insect-repellent effect. Further, the hot melt adhesive disposed on the exterior sheet is located on the non-skin side, and the amount of the hot melt adhesive disposed is large. Therefore, the smell of the hot melt adhesive is easily released to the outside. However, the odor of the hot melt adhesive is suppressed and the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance for disinsection is reduced.

In such an absorbent article, the insecticidal fragrance comprises a fragrance derived from any one of lemon grass, citronella, and eucalyptus citriodora.

According to the above absorbent article, since essential oils derived from the above natural plants are relatively easily available and contain many compounds which become active insect repellent ingredients, these materials are preferable.

In such an absorbent article, the insect fragrance includes a plurality of fragrances having different boiling points.

According to the absorbent article described above, the high boiling point fragrance can enhance the durability of the insect repellent effect. In addition, the low boiling point fragrance allows the user to identify the insect fragrance from an early stage.

In such an absorbent article, the fragrance for deinsectization contains at least one fragrance selected from the following group A having a boiling point of 200 ℃ or higher and 220 ℃ or lower and at least one fragrance selected from the following group B having a boiling point of 150 ℃ or higher and 200 ℃ or lower, and in the fragrance for deinsectization, the weight ratio of the fragrance from group A is larger than the weight ratio of the fragrance from group B.

Group A: citronellal, menthol, alpha-terpineol, linalool acetate, isopulegol, ethyl linalool, terpineol acetate, geranyl formate, menthone, borneol and camphor;

Group B: menthane, camphene, tetrahydrolinalool, dihydromyrcenol, basil, ocimene, myrcene, alpha-pinene, beta-pinene, alpha-phellandrene, alpha-terpinene, gamma-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3, 5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2, 4-hexadien-1-ol, 1-octen-3-ol, 2, 6-nondienol, tetrahydrolignan, 4-biota, n-heptanal, n-octanal, 3, 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, methyl heptanone, fenchyl ketone, acetyl furan, linalool oxide, menthofuran, 1, 8-eucalyptol, 1, 4-eucalyptol, 2, 6-trimethyl-6-vinyltetrahydropyran, cis-3-hexenyl formate, isoprene 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-methylpentanoate, ethyl heptanoate and allyl hexanoate.

According to the absorbent article described above, the insect repellent effect can be obtained by the fragrance of group a having a high weight ratio. The group B perfume allows the user to recognize the insect perfume from an early stage.

In this absorbent article, the plurality of members include an absorber and a liquid-impermeable sheet, the liquid-impermeable sheet being disposed on a non-skin side with respect to the absorber in a thickness direction of the absorbent article, and the fragrance for disinsection being disposed on a non-skin side with respect to the liquid-impermeable sheet in the thickness direction.

According to the absorbent article, the insect-repellent perfume is disposed on the non-skin side with respect to the liquid-impermeable sheet having low air permeability. This makes it easier to release the insect fragrance to the outside of the absorbent article and enhances the insect repellent effect.

Hereinafter, a belt type disposable diaper for children, which is an example of an absorbent article according to this embodiment, will be described. However, the absorbent article is not limited thereto, and disposable diapers for adults, underpants type disposable diapers, light incontinence pads, sanitary napkins, panty liners and the like may be employed.

Basic configuration of the disposable diaper 1 of the type= = = = = =

Fig. 1 is a plan view of a tape type disposable diaper 1 (hereinafter also referred to as "diaper") in a state of being stretched and elongated in the longitudinal direction when viewed from the skin side. Fig. 2A is a schematic cross-sectional view of the abdomen-side waist portion 3 of the diaper 1, fig. 2B is a schematic cross-sectional view of the crotch portion 5 of the diaper 1, and fig. 2C is a schematic cross-sectional view of the back-side waist portion 7 of the diaper 1.

The diaper 1 has a longitudinal direction (longitudinal direction) and a width direction (transverse direction). Further, the diaper 1 has an abdomen-side waist portion 3 applied to the abdomen side of the wearer, a crotch portion 5 applied to the crotch of the wearer, and a back-side waist portion 7 applied to the back side of the wearer, which are arranged side by side in the longitudinal direction. As shown in fig. 2A, the direction in which the constituent members of the diaper 1 are stacked on each other is referred to as the thickness direction. In the thickness direction, the side in contact with the wearer is referred to as the skin side, and the side opposite to the skin side is referred to as the non-skin side.

The diaper 1 includes an absorber 21, a front sheet 22, a leakage preventing sheet 23, an outer sheet 24, a pair of side sheets 26, a waist fold film (waist gather film) 28, a target tape 29, and a pair of fastening tapes 30.

The absorber 21 has an absorbent core 211. Examples of the absorbent core 211 may include an absorbent core, SAP sheets, air laid sheets, etc., wherein: the absorbent core is obtained by molding liquid absorbent fibers (e.g., pulp fibers) containing superabsorbent polymers (so-called SAP) into a predetermined shape; the SAP layer is adhered to the hydrophilic sheet in the SAP sheet; in an air laid sheet, liquid absorbent fibers are formed into a sheet by air laying. The absorbent core 211 may be covered with a core wrap 212 made of a liquid-permeable paper towel, nonwoven fabric, or the like.

The front sheet 22 is a liquid-permeable sheet disposed on the skin side with respect to the absorber 21 in the thickness direction. The leakage preventing sheet 23 is a liquid impermeable sheet disposed on the non-skin side with respect to the absorber 21 in the thickness direction. The outer sheet 24 is a sheet (for example, a nonwoven sheet) disposed on the non-skin side with respect to the leakage preventing sheet 23 in the thickness direction. The pair of side sheets 26 are sheets (for example, nonwoven fabric sheets or the like) extending outward in the width direction from both sides in the width direction of the front sheet 22.

The end edge portions forming the leg hole openings of the diaper 1 are provided with a pair of leg hole elastic members 15 (e.g., elastic threads or stretchable sheets) that stretch in the longitudinal direction, which fit the diaper 1 around the legs of the wearer. The leg elastic members 15 are fixed between the side panels 26 and the outer sheet 24 in an elongated state in the longitudinal direction.

Further, a pair of leakage preventing wall elastic members 16 (e.g., elastic threads or stretchable sheets) that stretch in the longitudinal direction are provided at widthwise inner positions of the leg hole elastic members 15. The leakage preventing wall elastic member 16 is fixed in an elongated state in the length direction between portions of the widthwise inner side portions of each side sheet 26 folded outward in the width direction (see fig. 2B). The contraction of the leakage preventing wall elastic member 16 causes a part of the side sheet 26 to stand up toward the skin side, thereby blocking excrement.

In the back side waistline portion 7, a waistline folded film 28 is arranged between the absorber 21 and the leakage preventing sheet 23 (see fig. 2C). The waistline folding film 28 is a belt-like member that stretches and contracts in the width direction. The waistline folded film 28 imparts stretchability to the back waistline portion 7 so that the diaper 1 fits around the waistline of the wearer.

Further, a pair of wing portions 14 are provided on both side portions in the width direction of the back side waistline portion 7. The wings 14 are each formed primarily of side panels 26 and an outer panel 24. The pair of fastening tapes 30 extend from the back side waistline portion 7 (the wing portion 14) to both outer sides in the width direction (the lateral direction). The fastening tape 30 is a sheet member (for example, a hydrophobic spunbond nonwoven sheet or the like) having a substantially rectangular shape long in the width direction. The fastening strap 30 has a fixing portion 32 fixed to the back-side waistline portion 7 and an extension portion 31 extending from the back-side waistline portion. Further, on the skin-side surface of each fastening tape 30, a hook member 33 (for example, a male member of a hook-and-loop fastener) that engages with the abdomen-side waist portion 3 is provided.

The target belt 29 is disposed on the non-skin side of the outer sheet 24 in the abdomen-side waist portion 3 (see fig. 2A). The target tape 29 is a member that can be engaged with the hook member 33 of the fastening tape 30, and is formed of, for example, a nonwoven fabric sheet. The target belt 29 of the present embodiment is a member having a rectangular shape extending in the width direction.

When the diaper 1 is put on, the diaper 1 in the unfolded state is folded in half at the substantially longitudinal center when applied to the wearer. Next, the pair of wing portions 14 of the back side waistline portion 7 are folded back inward in the width direction. Finally, the hook member 33 of the fastening tape 30 is fastened to the target tape 29 of the abdomen-side waist portion 3.

However, the configuration of the diaper 1 is not limited to the above-described configuration. For example, a configuration is also acceptable in which the diaper 1 does not have the target tape 29 and the hook members 33 of the fastening tape 30 are directly engaged with the exterior sheet 24. Further, for example, the diaper 1 need not include the waistline pleated membrane 28 and/or the outer cover 24.

First embodiment= = = = =

Fig. 3A and 3B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to the first embodiment. Fig. 3A is a sectional view showing the abdomen side of the diaper 1, and fig. 3B is a sectional view showing the back side of the diaper 1. Fig. 4 is an exploded perspective view of the periphery of the fastening tape 30. Fig. 5 is a view schematically showing the arrangement of the insect fragrance 40 in the cross section of the fastening tape 30. Fig. 6A and 6B are diagrams showing a modification of the diaper 1 according to the first embodiment.

In the diaper 1 of the first embodiment, the insect repellent fragrance 40 having an insect repellent effect (insect repellent effect, repellent effect) is disposed on the non-skin side portion 301 of the extension portion 31 of the fastening tape 30. It should be noted that the non-skin side of the fastening tape 30 refers to the outside (the side opposite to the wearer side) of the fastening tape 30 when the diaper 1 is put on, and also refers to the underside of the fastening tape 30 when the skin-side surface of the diaper 1 in the developed state is disposed face up, as shown in fig. 1.

By disposing the insect-repellent fragrance 40 in the diaper 1, insects such as mosquitoes can be kept away from the wearer when the diaper 1 is put on, so that biting of the wearer by the insects can be prevented. Furthermore, the entry of insects can be prevented during the logistics and storage of the diaper 1, so that the hygiene of the diaper 1 can be maintained.

On the other hand, the diaper 1 is formed of a plurality of members such as an absorber 21 and a front sheet 22. As shown in fig. 3A and 3B, the constituent members of the diaper 1 are joined to the constituent members adjacent in the thickness direction with hot melt adhesives A1 to A9. In the diaper 1 of the first embodiment, all the members are adhered to their own adjacent members with the hot melt adhesives A1 to A9. However, the configuration is not limited thereto as long as at least a part of the plurality of members included in the diaper 1 is bonded by a hot melt adhesive. That is, some members may be adhered by a method (e.g., heat welding) different from the adhering method using a hot melt adhesive.

Further, for example, in fig. 4, the areas where the hot melt adhesives A4, A8, and A9 are arranged are indicated by oblique lines. However, the hot melt adhesive may be disposed in the entire region or partially disposed in the region. That is, the hot melt adhesive may be applied in a solid (solid) manner, or may be applied in a known application pattern (e.g., spiral pattern, omega-shaped pattern, line pattern, etc.).

In general, a hot melt adhesive has a tackifier and a base polymer (thermoplastic block copolymer) as a main component. In addition, the hot melt adhesive includes wax, plasticizer, filler, stabilizer, and the like as necessary.

Examples of tackifiers included in hot melt adhesives include rosin-based resins, terpene-based resins, petroleum-based resins, and the like. Some tackifiers have an undesirable odor. In diapers 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 fragrance 40 for deinsectization is disposed in a diaper having a hot melt adhesive with a strong odor, the odor of the hot melt adhesive and the odor of the fragrance 40 for deinsectization are mixed, and there is a risk that a user (wearer, caregiver, etc.) of the diaper experiences an unpleasant odor.

Thus, in the diaper 1 of the first embodiment, at least some of the plurality of members included in the diaper 1 are adhered with the hot melt adhesive containing the hydrogenated tackifier.

The tackifier is hydrogenated to a hydrogenated derivative, which inhibits the odor of the tackifier. That is, the smell of the hot melt adhesive containing the hydrogenated tackifier is suppressed as compared with the hot melt adhesive containing no hydrogenated tackifier. In the following description, a hot melt adhesive containing a hydrogenated tackifier and whose odor is suppressed is also referred to as "low odor adhesive LA". In addition, hot melt adhesives that do not contain hydrogenated tackifiers are also referred to as "non-hydrogenated adhesives NA".

By making at least some of the hot melt adhesive used in the diaper 1 of the first embodiment a low-odor adhesive LA, the odor released to the outside of the diaper 1 by the hot melt adhesive can be suppressed. Therefore, although the fragrance 40 for deinsectization is disposed in the diaper 1, generation of unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for deinsectization can be suppressed. That is, in the diaper 1 of the first embodiment, unpleasant odor is reduced in the case where the fragrance 40 for deinsectization having an insect repellent function is provided.

It should be noted that specific examples of the low-odor adhesive LA include those containing hydrogenated rosin-based resins, hydrogenated terpene-based resins, hydrogenated petroleum-based resins, and the like. In addition, all of the tackifiers (resins) included in the low-odor adhesive LA may be hydrogenated tackifiers (hydrogenated derivatives). Or some tackifiers included in the low odor adhesive LA may be hydrogenated tackifiers (hydrogenated derivatives), and other tackifiers may be non-hydrogenated tackifiers.

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

As shown in fig. 5, the non-skin side portion 301 of the fastening tape 30 (the extension portion 311) is a portion of the fastening tape 30 on the non-skin side with respect to the intermediate position C in the thickness direction. Further, a portion of the fastening tape 30 on the skin side with respect to the intermediate position C in the thickness direction is defined as a skin side portion 302 of the fastening tape 30.

Since the fragrance 40 is disposed closer to the non-skin side (outer side) of the diaper 1, the fragrance 40 is more easily released to the outside of the diaper 1. Therefore, by disposing the insect-repellent fragrance 40 in the non-skin side portion 301 of the fastening tape 30 (the extension portion 31), the insect-repellent fragrance 40 is easily released to the outside of the diaper 1, thereby enhancing the insect-repellent effect. This also makes it easier for the user of the diaper 1 to identify the fragrance of the insect fragrance 40. As a result, it is possible to provide the user with a sense of expectation of the insect repellent effect, and the user is more likely to actually feel the insect repellent effect.

It should be noted that disposing the insect fragrance 40 on the non-skin side portion 301 of the fastening tape 30 means that the weight of the insect fragrance 40 disposed on the non-skin side portion 301 of the fastening tape 30 is greater than the weight of the insect fragrance 40 disposed on the skin side portion 302 of the fastening tape 30. Preferably, the insect fragrance 40 is disposed only in the non-skin side 301 of the fastening strip 30.

As described above, in the case where 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 for adhering the hook member 33 to the skin-side surface of the extension portion 31 of the fastening tape 30 is preferably 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 coated at a position close to the fragrance 40 for deinsectization. Thus, unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for disinsection is reduced.

In particular, in the diaper 1 of the first embodiment, as shown in fig. 4, the arrangement region of the hot melt adhesive A9 for adhering the hook member 33 to the fastening tape 30 and the arrangement region of the insect-repellent fragrance 40 partially overlap in the thickness direction of the diaper 1. The smell of the hot melt adhesive overlapped with the fragrance 40 for deinsectization in the thickness direction of the diaper 1 is liable to be mixed with the fragrance 40 for deinsectization. From this point, it can be said that the hot melt adhesive A9 for adhering the hook members 33 is preferably a low-odor adhesive LA.

That is, it is preferable that the area where the fragrance 40 for deinsectization is disposed has a portion 401 overlapping with the area where the low-odor adhesive LA is disposed when the diaper 1 is viewed in a plan view in the thickness direction (see fig. 4). This makes it possible to suppress the odor of the hot melt adhesive which overlaps with the fragrance 40 for deinsectization in the thickness direction and whose odor is liable to be mixed with the fragrance of the fragrance 40 for deinsectization. This reduces the unpleasant odor caused by the mixing of the hot melt adhesive odor and the insect fragrance.

It should be noted that, as described above, in the case of confirming the arrangement relationship between the fragrance 40 for deinsectization and the low-odor adhesive LA, it is preferable to check the arrangement relationship in a state where the diaper 1 is developed and elongated (hereinafter, the same applies). In the case of the belt diaper as in the present embodiment, as shown in fig. 1, the arrangement relationship is preferably confirmed in a state in which the diaper 1 is developed and stretched without wrinkling. Specifically, the extended state refers to a state in which the diaper 1 is extended such that the dimensions of the respective constituent members of the diaper 1 match or are close to the dimensions of the members themselves in a state in which the constituent members are not affected by the elastic members of the diaper 1. Further, although not shown, in the case of the pants-type diaper, it is preferable to confirm the arrangement relationship in a state where the joining portions on the left and right sides of the waist are unfastened and unfolded.

In the first embodiment, the insect fragrance 40 is disposed on the non-skin side with respect to the low-odor adhesives A9 and LA in the thickness direction of the diaper 1, and the hook members 33 are adhered to the fastening tape 30 with the low-odor adhesives A9 and LA. Therefore, the fragrance 40 for insect control is easily released to the outside of the diaper 1, and the insect control effect is enhanced. This also makes it easier for the user to identify the fragrance of the insect fragrance 40.

Further, it is preferable that not only the hot melt adhesive A9 for adhering the hook member 33 is the low-odor adhesive LA, but also the hot melt adhesive applied to a position near the fragrance 40 for deinsectization. For example, it is preferable that the hot melt adhesive A8 that fixes the fastening tape 30 to the side sheet 26 or the hot melt adhesive A4 that fixes the fastening tape 30 to the exterior sheet 24 is the low odor adhesive LA. This makes it difficult for the hot melt adhesive odor and the insect fragrance 40 to mix, thereby reducing the unpleasant odor caused by the hot melt adhesive odor and the insect fragrance mixing.

Further, the weight of the low odor adhesive LA disposed in the diaper 1 is preferably greater than the weight of the insect fragrance 40 disposed in the diaper. Since the use of the low-odor adhesive LA can suppress the odor of the hot-melt adhesive, it is not necessary to increase the amount of the fragrance for disinsection to overcome the odor of the hot-melt adhesive, and cost reduction can be achieved. In addition, by using a low-odor adhesive LA as the hot-melt adhesive used more in the diaper 1, unpleasant odor caused by the mixture of the odor of the hot-melt adhesive and the fragrance for deinsectization is further reduced.

In the diaper 1 shown in fig. 3A and 3B, all of the hot melt adhesives A1 to A9 for adhering the plurality of members included in the diaper 1 (i.e., all of the hot melt adhesives used in the diaper 1) are low-odor adhesives LA. In this case, the odor of the non-hydrogenated adhesive NA (i.e., the hot melt adhesive containing no hydrogenated tackifier) is not mixed with the fragrance 40 for deinsectization, so that generation of unpleasant odor can be prevented.

However, the configuration is not limited thereto. For example, as in the modification shown in fig. 6A and 6B, some of the plurality of members included in the diaper 1 may be adhered with the low-odor adhesive LA, and others of the plurality of members may be adhered with the non-hydrogenated adhesive NA. However, in this case, it is preferable that the weight of the low-odor adhesive LA disposed in the diaper 1 is larger than the weight of the non-hydrogenated adhesive NA disposed in the diaper. Accordingly, by using the low-odor adhesive LA as the hot-melt adhesive used more in the diaper 1, the odor released to the outside of the diaper 1 by the hot-melt adhesive can be suppressed, thereby reducing the unpleasant odor caused by the mixture of the odor of the hot-melt adhesive and the fragrance 40 for deinsectization.

In addition, the arrangement of the low odor adhesive LA is not limited to a position near the insect fragrance 40. For example, the absorber 21 included in the diaper 1 is a member having a large thickness. Therefore, the odor of the hot melt adhesives A1 and A2 applied on the skin side with respect to the absorber 21 and the odor of the hot melt adhesive A3 applied to the inside of the absorber 21 are relatively difficult to be released to the outside of the diaper 1. Therefore, it is preferable that the hot-melt adhesive for adhering the absorber 21 to the non-skin-side member disposed on the non-skin side with respect to the absorber 21 and the hot-melt adhesive for adhering the non-skin-side members to each other be the low-odor adhesive LA.

Specifically, it is recommended that at least one (preferably all) of the hot-melt adhesive A4 for adhering the absorber 21 to the waist puckered film 28 or the leakage preventing sheet 23, the hot-melt adhesive A5 for adhering the waist puckered film 28 to the leakage preventing sheet 23, the hot-melt adhesive A6 for adhering the leakage preventing sheet 23 to the exterior sheet 24, and the hot-melt adhesive A7 for adhering the exterior sheet 24 to the target tape 29 be the low-odor adhesive LA. This makes it possible to suppress the odor released to the outside of the diaper 1 by the hot melt adhesive, thereby reducing the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for deinsectization.

Further, the leakage preventing sheet 23 has low air permeability, and the smell of the hot melt adhesive disposed on the skin side with respect to the leakage preventing sheet 23 is not easily released to the outside of the diaper 1. That is, the smell of the hot melt adhesive A4 for adhering the absorber 21 and the non-skin side member (the waistline folded film 28 or the leakage preventing sheet 23) is not easily released to the outside of the diaper 1. Therefore, it is preferable that at least some of the hot melt adhesive for adhering the members on the non-skin side with respect to the absorber 21 to each other is the low-odor adhesive LA. More preferably, the hot melt adhesives A6 and A7 disposed on the non-skin side with respect to the leakage preventing sheet 23 are low-odor adhesives LA.

In particular, the hot melt adhesive A6 disposed on the skin-side surface of the exterior sheet 24 forming at least a part of the non-skin-side surface (outer surface) of the diaper 1 is located on the non-skin side, and the amount of the hot melt adhesive disposed (disposed area) is large. Therefore, the smell of the hot melt adhesive A6 is easily released to the outside. Therefore, it is preferable that the hot melt adhesive A6 is a low odor adhesive LA. Thus, unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for disinsection is reduced.

However, the present invention is not limited to the above configuration. The hot melt adhesives A1 and A2 applied to the skin side with respect to the absorber 21 and the hot melt adhesive A3 applied to the inside of the absorber 21 may be low-odor adhesives LA. Further, although not shown, the hot melt adhesive fixing the leg-surrounding elastic member 15 and the leakage preventing wall elastic member 16, the hot melt adhesive for forming the leakage preventing wall using the side sheet 26, or the like may be the low odor adhesive LA.

In addition, even in the case where the insect-repellent fragrance 40 is disposed in the fastening tape 30, the hot melt adhesive in the vicinity of the fastening tape 30 may be a non-hydrogenated adhesive NA as shown in fig. 6A and 6B. That is, the hot melt adhesives A9 for adhering the hook members 33 to the fastening tape 30 or the hot melt adhesives A8 and A4 for adhering the fastening tape 30 to the side sheet 26 or the exterior sheet 24 may be the non-hydrogenated adhesives NA. Also in this case, it is sufficient to use a low-odor adhesive LA in a portion of the diaper 1. In particular, the hot-melt adhesive disposed on the non-skin side (outer side) of the diaper 1 or the hot-melt adhesive applied over a wide range (for example, the hot-melt adhesive A6 applied to the outer sheet 24) is preferably the low-odor adhesive LA. Also in this case, the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for deinsectization is reduced.

It should be noted that the known methods may be employed to confirm the fact that the low-odor adhesive LA is used in the diaper 1, to confirm the members and regions where the low-odor adhesive LA is disposed, and to compare the weights of the low-odor adhesive LA and the non-hydrogenated adhesive NA. For example, after separating the respective members from the diaper 1 using cold spraying or the like, the members and regions where the hot melt adhesives (LA, NA) are disposed can be visually confirmed. Further, the confirmation may be performed as follows: fine colored particles (such as bamboo charcoal or cocoa powder) are sprinkled, and then the particles are brushed off, and the place where the particles adhere is visually confirmed. Further, for example, it can be confirmed whether the adhesive is a low-odor adhesive LA or a non-hydrogenated adhesive NA and its weight as follows: the component provided with the hot melt adhesive (LA, NA) was placed in a container, and then the container was sealed, and the components in the container were analyzed using a gas chromatography apparatus (GC-MS). Further, for example, the weight of the hot melt adhesive (LA, NA) may be calculated from the difference between the weights of the members (in a dry state) before and after the hot melt adhesive arranged in the members dissolves out to toluene.

Similarly, known methods may be employed to identify the components and areas where the insect fragrance 40 is disposed. For example, the component analysis of the components separated from the diaper 1 using a gas chromatography apparatus (GC-MS) can confirm whether the insect fragrance 40 is disposed in the components and the weight of the insect fragrance 40 in the components. In the case where the insect-repellent perfume 40 is contained in the microcapsule, for example, the surface or the cross section of the member is observed with an electron microscope, whereby the member or the region in which the insect-repellent perfume 40 is disposed can be confirmed.

Further, it is preferable that the fragrance 40 for deinsectization is contained in a microcapsule (film material). Examples of microcapsules include microcapsules that break due to physical pressure (impact, friction) and release the insect fragrance 40. Specifically, capsules (film members) of polyurethane resin, gelatin/gum arabic, melamine resin, urea/formalin resin, or the like, which are used alone or in combination, may be exemplified.

By containing the fragrance 40 for deinsectization in the microcapsule, the fragrance 40 for deinsectization can be prevented from volatilizing before the diaper 1 is put on, so that the function of expelling insects can be exhibited when the diaper 1 is put on. Further, since the plurality of microcapsules are sequentially broken and the fragrance 40 for insect control is released when the diaper 1 is worn, durability of the insect repellent function is enhanced. In particular, in the diaper 1 of the first embodiment, the insect-repellent fragrance 40 is disposed in the fastening tape 30. Therefore, since the fastening tape 30 is held when the diaper 1 is put on, the microcapsules are liable to be broken, thereby exhibiting the insect-repellent function reliably when the diaper 1 is put on. However, the configuration is not limited thereto. The insect fragrance 40 need not be contained in microcapsules.

As described above, in the diaper 1 according to the first embodiment, the insect fragrance 40 is disposed in the non-skin side portion 301 of the extension portion 31 of the fastening tape 30. Further, it is preferable that the weight of the fragrance 40 for deinsectization (microcapsule) entering the inside of the fastening tape 30 is greater than the weight of the fragrance 40 for deinsectization positioned on the non-skin side surface 30b of the fastening tape 30. This prevents the microcapsules from being easily broken and releases the insect fragrance 40, thereby improving the durability of the insect repellent effect. It should be noted that the non-skin side surface 30b of the fastening tape 30 is a surface formed by the vertices of the most protruding fibers in the nonwoven fabric fiber layer constituting the fastening tape 30. The inside of the fastening tape 30 refers to the portion inside thereof.

For this purpose, the following operations are preferably performed. First, the average particle diameter (e.g., 5 μm to 15 μm) of the insect fragrance 40 (microcapsule) is made smaller than the average fiber diameter (e.g., 20 μm) of the fastening tape 30. Specifically, the weight of the fragrance 40 for deinsectization having a particle diameter smaller than the average fiber diameter (20 μm) of the fastening tape 30 is made larger than the weight of the fragrance 40 for deinsectization having a particle diameter larger than the average fiber diameter (20 μm) of the fastening tape 30. This makes the insect fragrance 40 easier to enter the inside of the fastening tape 30, improving the durability of the insect repellent effect.

However, if the particle size of the insect fragrance 40 is too small, static electricity is easily generated. The particles cannot move from the top of the non-skin side surface 30b of the fastening tape 30 and continue to remain above the non-skin side surface 30b. This makes it difficult for the insect fragrance to enter the interior of the fastening strip 30. Therefore, the particle diameter of the microcapsule containing the fragrance 40 for disinsection is preferably 0.1 μm or more (preferably 0.5 μm or more).

Further, in order to dispose the fragrance 40 for deinsectization on the non-skin side portion 301 of the fastening tape 30, it is recommended that a liquid in which the fragrance 40 for deinsectization contained in the microcapsule is dispersed be applied to the non-skin side surface 30b of the fastening tape 30. It should be noted that as the coating method, a known method such as a spray method, a roll coating method, or a brush coating method may be employed.

Specifically, in the present embodiment, an aqueous dispersion liquid containing polyvinyl alcohol (PVA) having an adhesive function and further containing microcapsules containing the fragrance 40 for deinsectization dispersed in water is applied to the non-skin side surface 30b of the fastening tape 30. It should be noted that it is recommended to add a hydrophilic agent (0.3%, polyoxyethylene sorbitan monooleate) to the aqueous dispersion in order to uniformly apply the aqueous dispersion to the fastening tape 30. Further, in this case, it is preferable to add an antifoaming agent (0.2%, polyoxyethylene polyoxypropylene glycol (block copolymer)) according to the added hydrophilic agent.

Furthermore, the fastening tape 30 is preferably formed of a hydrophobic nonwoven sheet or a nonwoven sheet having a higher basis weight. In this case, the aqueous dispersion does not move far in the fastening tape 30, and the microcapsules (the fragrance 40 for disinsection) are liable to remain in the non-skin side 301 of the fastening tape 30.

In the case where the insect fragrance 40 is disposed in the fastening tape 30, the structure is not limited to the structure in which the insect fragrance 40 is disposed in the non-skin side portion 301 of the extension portion 31 of the fastening tape 30 as in the present embodiment. For example, the insect fragrance 40 may be disposed in the skin side portion 302 of the extension 31 of the fastening tape 30, or may be disposed throughout the fastening tape 30 in the thickness direction. The insect fragrance may be disposed in the fixing portion 32 of the fastening tape 30.

The method for disposing the insect fragrance 40 in the diaper 1 is not limited to the method of applying the dispersion of the insect fragrance 40 contained in the microcapsules to the member described above. For example, a solution of the insect fragrance 40 not contained in the microcapsules may be applied to the member. Furthermore, for example, the following methods are also acceptable: impregnating a member to be provided with the insect fragrance 40 with a solution of the insect fragrance 40; or kneading the insect fragrance 40 into the fibers constituting the member. Alternatively, the following method is also acceptable: the fragrance 40 for deinsectization kneaded into wax (wax) is disposed on the member to release the fragrance 40 for deinsectization by friction or heating of a user. Furthermore, in the case where a large amount of the insect fragrance 40 does not enter the interior of the member but stays on the surface, the following method is also acceptable: the area where the insecticide perfume 40 is disposed is covered with tape, and the user peels the tape when using the diaper 1. This prevents the fragrance from volatilizing.

Next, the insect fragrance 40 will be described. The fragrance 40 for deinsectization is not particularly limited as long as it exhibits an insect repellent effect, but it is preferable that the fragrance 40 for deinsectization contains a plurality of fragrances having different boiling points. High boiling point fragrances with high boiling points require time to volatilize. Thus, the high boiling point fragrance can enhance the durability of the insect repellent effect. On the other hand, low boiling point fragrances with low boiling points volatilize relatively quickly. Therefore, the fragrance of the fragrance 40 for deinsectization can be recognized by the user (attracting the user) at an early stage, that is, when the user takes out the diaper 1 from the package or when the diaper 1 is put on. As a result, the user can be provided with a sense of expectation of the insect repellent effect, and the user can more easily feel the insect repellent effect in practice.

As the fragrance 40 for deinsectization comprising a plurality of fragrances having different boiling points, there can be specifically exemplified a fragrance for deinsectization comprising at least one fragrance having a boiling point of 200 ℃ or higher and 220 ℃ or lower selected from the following group a and at least one fragrance having a boiling point of 150 ℃ or higher and 200 ℃ or lower selected from the following group B.

Group a fragrances include: citronellal, menthol, alpha-terpineol, linalool acetate, isopulegol, ethyl linalool, terpineol acetate, geranyl formate, menthone, borneol and camphor.

Group B fragrances include: menthane, camphene, tetrahydrolinalool, dihydromyrcenol, ocimene, myrcene, alpha-pinene, beta-pinene, alpha-phellandrene, alpha-terpinene, gamma-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3, 5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2, 4-hexadien-1-ol, 1-octen-3-ol, 2, 6-nondienol, tetrahydrolignan, 4-biotronic alcohol, n-heptanal, n-octanal, 3, 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, methyl heptanone, fenchyl ketone, acetyl furan, linalool oxide, menthofuran, 1, 8-cineole, 1, 4-cineole, 2, 6-trimethyl-6-vinyl tetrahydropyran, cis-3-hexenyl formate, isoproacetate, hexyl acetate, cis-3-hexenyl acetate, trans-2-hexenyl acetate, heptyl acetate, hexyl propionate, cis-3-hexenyl butyrate, cis-3-hexenyl isobutyrate, ethyl 2-methylpentanoate, ethyl heptanoate and allyl hexanoate should be noted, in addition to the above-described perfume, the perfume 40 for deinsectization contains a solvent (for example, isopropyl myristate).

In addition, in the fragrance 40 for deinsectization, it is preferable that the weight ratio of the fragrance from group a is higher than the weight ratio of the fragrance from group B. This makes it possible to obtain an insect repellent effect with a high boiling point fragrance (fragrance of group a) having a high weight ratio. Then, by adding the low boiling point perfume (group B perfume), the user can recognize the insect-repellent perfume 40 from the initial stage, and can provide the user with a sense of expectation of the insect-repellent effect.

The perfume in group a, the perfume in group B, and the perfume in group C described below are all allergen-free substances. For this reason, the user can be provided with a sense of security in terms of allergic reactions. Furthermore, neither group A nor group B fragrances contained any of the following 26 fragrances labeled as allergens as specified by the European Union (EU) cosmetic directive (76/768/EEC). For this reason, the user can be given a feeling of mind regarding the allergic reaction.

The 26 fragrances are alpha-isomethyl ionone, amyl cinnamaldehyde, amyl cinnamyl alcohol, fennel alcohol, benzyl benzoate, benzyl cinnamate, benzyl salicylate, butylphenyl methylpropal, cinnamaldehyde, cinnamyl alcohol, citral, citronellol, coumarin, eugenol, farnesol, geraniol, hexyl cinnamaldehyde, hydroxycitronellal, hydroxyisohexyl 3-cyclohexenyl formaldehyde, isoeugenol, limonene, linalool, 2-Xin Guisuan methyl ester, acorn extract, and tree moss extract. As used herein, the term "free of" these fragrances means that the fragrances are substantially absent, and not completely absent (not present at all). If the proportion of the perfume in the perfume for deinsectization (solvent+perfume) is 1% or less, it can be considered that the perfume is substantially not contained.

In addition, none of the group a fragrances, the group B fragrances, and the group C fragrances described below inhibit the adhesive properties of the hot melt adhesive. For this reason, the fragrance volatilized in the package (package member) before the use of the diaper 1 acts on the hot melt adhesive, and the occurrence of peeling or the like of the diaper 1 can be prevented. This enables the performance of the diaper 1 to be appropriately maintained.

It should be noted that the insect fragrance that inhibits the adhesive properties of the hot melt adhesive includes: limonene, phenylacetaldehyde, methyl salicylate, thymol, methyl isoeugenol, coumarin, beta-phenethyl alcohol, cymene, eugenol, carvacrol, phenethyl acetate, safrole, benzyl acetate, storax acetate, anisole acetate, cinnamyl acetate, cumyl aldehyde, diphenyl oxide and cinnamyl formate. The fragrances of group a and the fragrances of group B do not comprise any of these fragrances (the definition of "do not comprise" these fragrances is the same as before).

In addition, the fragrance 40 for deinsectization preferably contains at least one fragrance having a boiling point higher than 220 ℃ and lower than or equal to 270 ℃ selected from the following group C, in addition to the high boiling point fragrance (fragrance of group a) and the low boiling point fragrance (fragrance of group B). The fragrances of group C include: 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, nor Bo Zhi acetate, menthone, and allyl octanoate. In this case, the fragrance having a high boiling point is further added to the low boiling point fragrance and the high boiling point fragrance, thereby making it possible to enhance the durability of the insect-repellent effect.

The fragrance 40 for deinsectization according to the present embodiment has the following features. As the perfume, 30% to 40% of citronellal, 10% to 15% of 1, 8-eucalyptol, 10% to 15% of isobornyl acetate, and less than 1% of other perfumes were added to 50% by weight of isopropyl myristate as a solvent (this applies also hereinafter). At least one fragrance selected from group B is included in less than 1% of the "other fragrances". For example, menthane is included.

Further, the fragrance 40 for deinsectization is not limited to those listed above, and may include, for example, a fragrance for deinsectization containing only fragrance of group a, a fragrance for deinsectization containing at least one fragrance of group a and at least one fragrance of group C, or a fragrance for deinsectization containing only fragrance of group C.

Here, fragrances can be broadly classified into natural fragrances and synthetic fragrances. Synthetic perfumes are chemically synthesized and thus do not contain various perfume components. Synthetic perfumes include isolated perfumes, fully synthetic perfumes, semisynthetic perfumes and biosynthetic perfumes. For example, by using only synthetic flavors, inclusion of substances (e.g., the above-mentioned allergens or substances inhibiting hot melt adhesives) that should not be included in the insect-repellent flavor 40 can be appropriately avoided.

However, the present invention is not limited thereto, and the deinsectization perfume 40 may include natural perfume. Examples of the natural perfume may include natural essential oil and the like, which is a perfume directly extracted from natural plants and the like. Specifically, the insecticidal fragrance 40 preferably comprises a fragrance derived from any one of lemongrass, citronella, and eucalyptus citriodora. In this case, an ingredient having an insect repellent effect (e.g., citronellal, citral, geraniol, geranyl acetate, isopulegol, citronellol, etc.) is applied to the diaper 1. In addition, since natural essential oils are relatively easily available and contain many compounds which can be effective ingredients for expelling parasites, these materials are preferable.

= = second embodiment= = =

Fig. 7A and 7B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to the second embodiment. Fig. 7A is a sectional view showing the abdomen side of the diaper 1, and fig. 7B is a sectional view showing the back side of the diaper 1. Fig. 8 is an exploded perspective view of the periphery of the exterior sheet 24. Hereinafter, the configuration of the diaper 1 according to the second embodiment, which is different from the diaper 1 according to the first embodiment, will be mainly described.

In the diaper 1 of the second embodiment, the insect-repellent fragrance 40 is disposed in the outer sheet 24. The leakage preventing sheet 23 as a liquid impermeable sheet has low air permeability as compared with a liquid permeable sheet (for example, the exterior sheet 24 formed of a nonwoven fabric sheet), and the insect fragrance 40 does not easily pass through the leakage preventing sheet 23. Therefore, the insect-repellent perfume 40 is preferably disposed on the non-skin side with respect to the leakage preventing sheet 23 in the thickness direction of the diaper 1. That is, it is preferable that the fragrance 40 for disinsection is disposed on the exterior sheet 24 as in the present embodiment, or that the fragrance 40 for disinsection is disposed on the target tape 29 as shown in fig. 9A described below. This makes it easier for the fragrance of the insect fragrance 40 to be released to the outside of the diaper 1, and the insect repellent effect is enhanced. This also makes it easier for the user of the diaper 1 to identify the fragrance of the insect fragrance 40.

In the case where the insect-repellent perfume 40 is disposed in the fastening tape 30 as in the diaper 1 of the first embodiment, the insect-repellent perfume 40 is disposed on the abdomen side of the wearer. On the other hand, since the exterior sheet 24 forms the exterior shape of the diaper 1, the insect fragrance 40 may be disposed not only on the abdominal side portion of the wearer but also at a position of the diaper 1 corresponding to a portion desired by the wearer (such as around the back or leg portion). The insecticidal fragrance 40 can be disposed in a wide range of the diaper 1. Note that fig. 9 shows, as a region where the insect fragrance 40 is disposed, a region which is located at the center of the outer sheet 24 in the width direction and extends from one end to the other end of the outer sheet 24 in the length direction. But the present invention is not limited thereto.

The insect fragrance 40 may be disposed entirely in the outer sheet 24 in the thickness direction, and may be disposed on the skin side or non-skin side of the outer sheet 24. Specifically, it is preferable that a larger amount of the averting perfume 40 is arranged in a portion on the skin side with respect to the intermediate position in the thickness direction of the exterior sheet 24 by applying the averting perfume 40 from the skin of the exterior sheet 24, for example. In this case, the durability of the fragrance 40 for deinsectization can be enhanced. Alternatively, by applying the fragrance 40 for disinsection, for example, from the non-skin side of the exterior sheet 24, a larger amount of the fragrance 40 for disinsection may be arranged in a portion located on the non-skin side with respect to the intermediate position in the thickness direction of the exterior sheet 24. In this case, the fragrance 40 for deinsectization is easily released to the outside of the diaper 1, enhancing the insect repellent effect, and also making it easier for the user to recognize the fragrance of the fragrance 40 for deinsectization.

Further, the exterior sheet 24 has a portion covered with the target tape 29 from the non-skin side as shown in fig. 7A and a portion serving as the outermost layer (non-skin side surface) of the diaper 1 as shown in fig. 7B. In the case where the fragrance 40 for disinsection is disposed in a portion of the exterior sheet 24 located inside the target tape 29, the target tape 29 is preferably a sheet (for example, a nonwoven fabric sheet) having air permeability. Therefore, the immediate volatilization of the fragrance 40 for insect that is disposed in the portion of the exterior sheet 24 that overlaps the target tape 29 (fig. 7A) can be suppressed as compared with the fragrance 40 for insect that is disposed in the portion that does not overlap the target tape. On the other hand, the insect fragrance 40 disposed in the portion of the exterior sheet 24 serving as the outermost layer of the diaper 1 (fig. 7B) is easily released to the outside of the diaper 1, enhancing the insect repellent effect, and also making it easier for the user to recognize the fragrance of the insect fragrance 40.

Then, in the case where the fragrance 40 for disinsection is disposed on the exterior sheet 24, it is preferable that the hot melt adhesive A7 for adhering the target tape 29 to the exterior sheet 24 is a low odor adhesive LA. That is, the hot melt adhesive A7 disposed on the non-skin side with respect to the insect-repellent perfume 40 in the thickness direction of the diaper 1 is preferably a low-odor adhesive LA.

This makes it possible to suppress the odor of the hot melt adhesive A7 which is disposed on the non-skin side of the diaper 1 and whose odor is easily released to the outside of the diaper 1. Thus, the unpleasant odor caused by the mixture of the hot melt adhesive odor and the insect fragrance 40 is reduced.

Further, as described in the first embodiment, it is preferable that the hot melt adhesive used more in the diaper 1 is the low odor adhesive LA. In particular, it is recommended that the hot melt adhesive having a weight greater than that of the insecticidal fragrance 40 be a low odor adhesive LA or have a weight greater than that of the non-hydrogenated adhesive NA. This further reduces the unpleasant odor caused by the hot melt adhesive odor and the mixing of the insect fragrance 40.

Among these adhesives, the hot melt adhesive disposed on the non-skin side with respect to the absorber 21 is preferably the low-odor adhesive LA because the odor thereof is easily released to the outside of the diaper 1. Further, it is preferable that the hot melt adhesive overlapping the insect-repellent perfume 40 disposed on the exterior sheet 24 in the thickness direction is a low-odor adhesive.

Specifically, as shown in fig. 7A and 7B, it is recommended that at least one, preferably all, of the hot-melt adhesive A4 for adhering the absorber 21 to the waist puckered film 28 or the leakage preventing sheet 23, the hot-melt adhesive A5 for adhering the waist puckered film 28 to the leakage preventing sheet 23, the hot-melt adhesive A6 for adhering the leakage preventing sheet 23 to the exterior sheet 24, and the hot-melt adhesive A7 for adhering the exterior sheet 24 to the target tape 29 be the low-odor adhesive LA. This makes it possible to suppress the odor released to the outside of the diaper 1 by the hot melt adhesive, reducing the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for deinsectization.

In particular, as shown in fig. 8, it is recommended that the hot melt adhesive (the adhesive A6 for adhering the leakage preventing sheet 23 to the exterior sheet 24, or the adhesive A7 for adhering the exterior sheet 24 to the target tape 29) disposed in the vicinity of the fragrance 40 for deinsectization be the low-odor adhesive LA. This makes the mixing of the hot melt adhesive odor and the insect fragrance 40 difficult, reducing the unpleasant odor caused by the mixing of the hot melt adhesive odor and the insect fragrance.

However, the present invention is not limited thereto, and it is sufficient that at least some of the plurality of members included in the diaper 1 are adhered to each other with the low-odor adhesive LA. Thus, unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for disinsection is reduced.

= = other embodiments= = = =

While the above-described embodiments of the present invention have been described, the above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit the explanation of the present invention. Further, the present invention may be modified or improved within the scope of the gist of the present invention, and further, it goes without saying that the present invention also includes equivalents thereof.

Fig. 9A and 9B are explanatory views showing hot melt adhesives A1 to A9 used in the diaper 1 according to other embodiments. In the above embodiment, the case where the fragrance 40 for deinsectization is fixed to the fastening tape 30 or the exterior sheet 24 has been exemplified, but the present invention is not limited thereto. For example, as shown in fig. 9A and 9B, the insect-repellent fragrance 40 may be disposed in the target tape 29. Also in this case, it is preferable that at least some of the plurality of members included in the diaper 1 are adhered with the low-odor adhesive LA. Thus, unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for disinsection is reduced.

In this case, since the target tape 29 forms the outermost layer (non-skin-side surface) of the diaper 1, the insect-repellent fragrance 40 is disposed on the non-skin side with respect to the hot-melt adhesive (low-odor adhesive LA) in the thickness direction. Thus, the fragrance 40 for deinsectization is easily released to the outside of the diaper 1, the insect repellent effect is enhanced, and this also makes it easier for the user to recognize the fragrance 40 for deinsectization.

Further, when the diaper 1 is put on, the fastening tape 30 is fastened to the target tape 29. It is therefore preferable that the hot melt adhesive (e.g., the adhesive A9 for adhering the hook members 33 to the fastening tape 30, etc.) around the fastening tape 30 be the low odor adhesive LA.

This makes it possible to suppress the odor of the hot melt adhesive disposed in the vicinity of the fragrance 40 for disinsection, reducing the unpleasant odor caused by the mixture of the odor of the hot melt adhesive and the fragrance 40 for disinsection.

Description of the reference numerals

1: diaper (absorbent article)

3: abdomen-side waistline portion, 5: crotch portion, 7: a back side waist part,

15: leg elastic member, 16: an elastic member for preventing leakage,

21: absorber, 22: a front sheet,

23: a leakage-proof sheet (non-liquid-permeable sheet, non-skin side member),

24: outer sheet (non-skin side member), 26: a side sheet,

28: waist fold film (non-skin side member),

29: target belt (non-skin side component)

30: fastening tape, 31: extension, 32: fixing portion, 33: a hook member,

40: a spice for deinsectization,

A1 to A9: a hot melt adhesive,

LA: low odor adhesives (hot melt adhesives containing hydrogenated tackifiers),

NA: non-hydrogenated adhesives (hot melt adhesives without hydrogenated tackifiers)

Claims (13)

1. An absorbent article, comprising:

a plurality of members; and

an insect-repellent fragrance disposed in the absorbent article,

at least some of the plurality of components are adhered with a hot melt adhesive comprising a hydrogenated tackifier.

2. The absorbent article of claim 1, wherein the absorbent article comprises,

the plurality of members includes an absorbent body and a non-skin side member,

the non-skin side member is a member disposed on the non-skin side with respect to the absorber in the thickness direction of the absorbent article, and

at least some of the hot melt adhesives used to adhere the non-skin side members to one another include the hydrogenated tackifier.

3. The absorbent article as claimed in claim 1 or 2, characterized in that,

when the absorbent article is viewed in a plan view in the thickness direction,

The region where the insect-repellent fragrance is disposed has a portion overlapping with the region where the hot melt adhesive containing the hydrogenated tackifier is disposed.

4. The absorbent article as set forth in any one of claims 1 to 3 wherein,

the weight of the hot melt adhesive containing the hydrogenated tackifier disposed in the absorbent article is greater than the weight of the insect-repellent fragrance disposed in the absorbent article.

5. The absorbent article as in any of claims 1-4, wherein,

some of the plurality of components are adhered with a hot melt adhesive comprising the hydrogenated tackifier,

the other of the plurality of components is adhered with a hot melt adhesive that does not contain the hydrogenated tackifier, and

the weight of the hot melt adhesive comprising the hydrogenated tackifier disposed in the absorbent article is greater than the weight of the hot melt adhesive comprising no hydrogenated tackifier disposed in the absorbent article.

6. The absorbent article as in any of claims 1-4, wherein,

the hot melt adhesive used to adhere the plurality of components is all hot melt adhesive containing the hydrogenated tackifier.

7. The absorbent article as in any of claims 1-6, wherein,

the hot melt adhesive disposed on the non-skin side with respect to the insect-repellent fragrance in the thickness direction of the absorbent article contains the hydrogenated tackifier.

8. The absorbent article as in any of claims 1-6, wherein,

the insect-repellent fragrance is disposed on the non-skin side with respect to the hot-melt adhesive containing the hydrogenated tackifier in the thickness direction of the absorbent article.

9. The absorbent article as in any of claims 1-6, wherein,

the absorbent article has a longitudinal direction and a transverse direction,

the absorbent article further comprises a pair of fastening strips,

the pair of fastening strips extend from a back side waistline portion to be applied to the back side portion of the wearer to both outer sides in the lateral direction,

the fastening belt has

A fixing portion fixed to the back side waistline portion, and

an extension extending from the back side waistline portion,

the fastening strip includes a hook member engaged with a ventral waistline portion to be applied to the ventral portion of the wearer,

the insect fragrance is disposed in the non-skin side portion of the extension portion of the fastening strap, and

The hydrogenated tackifier is contained in a hot melt adhesive disposed on a skin-side surface of an outer sheet forming at least a part of a non-skin-side surface of the absorbent article.

10. The absorbent article as claimed in any one of claims 1 to 9, characterized in that,

the insecticidal perfume comprises a perfume derived from any one of lemon grass, citronella and eucalyptus citriodora.

11. The absorbent article as claimed in any one of claims 1 to 10, characterized in that,

the insect fragrance comprises a plurality of fragrances having different boiling points.

12. The absorbent article as in claim 11, wherein,

the perfume for deinsectization comprises at least one perfume selected from the following group A having a boiling point of 200 ℃ or higher and 220 ℃ or lower and at least one perfume selected from the following group B having a boiling point of 150 ℃ or higher and 200 ℃ or lower, and

in the insecticidal perfume, the weight ratio of the perfume from the A group is larger than that of the perfume from the B group,

group A: citronellal, menthol, alpha-terpineol, linalool acetate, isopulegol, ethyl linalool, terpineol acetate, geranyl formate, menthone, borneol and camphor;

Group B: menthane, camphene, tetrahydrolinalool, dihydromyrcenol, basil, ocimene, myrcene, alpha-pinene, beta-pinene, alpha-phellandrene, alpha-terpinene, gamma-terpinene, terpinolene, 3-carene, 1-heptanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 3-octanol, 2-nonanol, 3, 5-trimethyl-1-hexanol, cis-3-hexenol, trans-2-hexenol, 2, 4-hexadien-1-ol, 1-octen-3-ol, 2, 6-nondienol, tetrahydrolignan, 4-biota, n-heptanal, n-octanal, 3, 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, methyl heptanone, fenchyl ketone, acetyl furan, linalool oxide, menthofuran, 1, 8-eucalyptol, 1, 4-eucalyptol, 2, 6-trimethyl-6-vinyltetrahydropyran, cis-3-hexenyl formate, isoprene 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-methylpentanoate, ethyl heptanoate and allyl hexanoate.

13. The absorbent article as in any of claims 1-12, wherein,

the plurality of members includes an absorber and a liquid impermeable sheet,

the liquid-impermeable sheet is a sheet disposed on the non-skin side with respect to the absorber in the thickness direction of the absorbent article, and

the insect-repellent perfume is disposed on the non-skin side with respect to the non-liquid-permeable sheet in the thickness direction.

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