Absorbent article and production method of the same

Abstract

To provide an absorbent article which can enhance persistence of a flavor and allows a user to actually feel the flavor.SOLUTION: There is provided an absorbent article (1) comprising: an absorbent core (12); a leakage prevention sheet (13); and a non skin side sheet (14). On a non skin side relative to the leakage prevention sheet (13), there is provided a flavor application region (40) where a flavor is applied. The flavor application region (40) extends in a linear state in a prescribed direction. In viewing the absorbent article (1) in an extended state from a thickness direction, the flavor application region (40) has a part which overlaps a non-junction part (50) where the leakage prevention sheet (13) and the non skin side sheet (14) are not joined.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to absorbent articles and a method for manufacturing absorbent articles.

Background Art

[0002] Conventionally, absorbent articles having a fragrance have been known. For example, Patent Document 1 discloses a disposable diaper in which a fragrance (contact-sensitive aromatic member) is located on the surface of a backsheet, and a breathable member (a nonwoven web bonded to a perforated film layer) is fixedly attached to the surface of the backsheet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the disposable diaper of Patent Document 1, the fragrance is contained in a binder (a binding material containing an adhesive). Therefore, it is difficult for the fragrance to be released, and there is a risk that the user may hardly feel the fragrance. In addition, although the film layer constituting the breathable member is provided with apertures, the breathable member and the backsheet are joined by a binder. Therefore, the size of the aperture space is constant and is relatively small, only the thickness width of the film layer. Thus, even if the fragrance is released from the binder, it is difficult to stay in the aperture space, and the persistence of the fragrance is low. Furthermore, in Patent Document 1, since the fragrance is contained in the binder, the fragrance is widely applied to the entire surface of the backsheet. In this case, the amount of fragrance per unit area tends to be small, and from this point as well, the persistence of the fragrance tends to decrease. Then, the effect of the fragrance is not exhibited when the absorbent article is used.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an absorbent article that enhances the persistence of a fragrance and makes it easier for a user to perceive the fragrance.

Means for Solving the Problems

[0006] The main invention for achieving the above object is an absorbent article having a width direction, a length direction, and a thickness direction that are orthogonal to each other in a deployed state, a liquid-absorbent absorbent core, a leak-proof sheet provided on the non-skin side of the absorbent core, and a non-skin side sheet provided on the non-skin side of the leak-proof sheet, wherein on the non-skin side of the leak-proof sheet, there is a fragrance application region where a fragrance is applied, the fragrance application region linearly extends in a predetermined direction, when the absorbent article in the deployed state is viewed in the thickness direction, the fragrance application region has a portion overlapping a non-joined portion where the leak-proof sheet and the non-skin side sheet are not joined. Other features of the present invention will be clarified by the description in this specification and the accompanying drawings.

Effects of the Invention

[0007] According to the present invention, it is possible to provide an absorbent article that enhances the persistence of a fragrance and makes it easier for a user to perceive the fragrance.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

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Figure 4

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Figure 7

Figure 8

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Figure 10

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Figure 12

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Figure 14

Mode for Carrying Out the Invention

[0009] From the description in this specification and the attached drawings, at least the following matters become clear. (Aspect 1) An absorbent article having a width direction, a length direction, and a thickness direction that are orthogonal to each other in the unfolded state, a liquid-absorbent absorbent core, a leak-proof sheet provided on the non-skin side of the absorbent core, and a non-skin side sheet provided on the non-skin side of the leak-proof sheet, wherein on the non-skin side of the leak-proof sheet, there is a fragrance application area where a fragrance is applied, the fragrance application area extends linearly in a predetermined direction, and when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application area has a portion overlapping with a non-joined portion where the leak-proof sheet and the non-skin side sheet are not joined.

[0010] According to Aspect 1, since the fragrance is disposed on the non-skin side of the absorbent article and is more likely to be released to the outside, it becomes easier for the user to perceive the fragrance. Further, the fragrance is released over a wide range in a predetermined direction of the absorbent article, and its effect is exhibited. Further, compared with the case where the fragrance is applied over the entire plane, for example, a predetermined amount of the fragrance can be applied thickly, and the persistence of the fragrance is enhanced. Further, in the non-bonded portion, since the fragrance is likely to volatilize and stay in the space between the leak-proof sheet and the non-skin side sheet, the persistence of the fragrance can be enhanced while effectively utilizing the fragrance.

[0011] (Aspect 2) The absorbent article according to Aspect 1, wherein When the absorbent article in the deployed state is viewed in the thickness direction, the fragrance application region continuously has a portion overlapping with the non-bonded portion from one end to the other end in the predetermined direction.

[0012] According to Aspect 2, since the space between the leak-proof sheet and the non-skin side sheet extends continuously in the predetermined direction, the fragrance easily volatilizes into the space and easily diffuses in the predetermined direction. Therefore, the effect of the fragrance is exhibited over a wide range in the predetermined direction of the absorbent article.

[0013] (Aspect 3) The absorbent article according to Aspect 1 or 2, wherein When the absorbent article in the deployed state is viewed in the thickness direction, the fragrance application region has a portion overlapping with the absorbent core.

[0014] According to Aspect 3, when the absorbent core absorbs the excreted liquid, the humidity in the space between the leak-proof sheet and the non-skin side sheet increases. Therefore, the fragrance adheres to the high-humidity air, and the persistence of the fragrance can be enhanced.

[0015] (Aspect 4) The absorbent article according to any one of Aspects 1 to 3, wherein When the absorbent article in the deployed state is viewed in the thickness direction, the fragrance application region has a portion overlapping with the central region when the absorbent article is divided into three in the longitudinal direction.

[0016] According to Aspect 4, the fragrance is easily released around the wearer's leg exposed from the absorbent article, and the function of the fragrance (for example, the insect repellent function) acts effectively.

[0017] (Aspect 5) The absorbent article according to any one of Aspects 1 to 4, having an elastic member that expands and contracts in the width direction, wherein the fragrance application area extends in the longitudinal direction, a plurality of which are arranged in the width direction, and the elastic member and the plurality of fragrance application areas overlap in the width direction.

[0018] According to Aspect 5, the interval between the plurality of fragrance application areas is narrowed by the elastic member, and the amount of fragrance per unit area increases, so that the user can easily feel the fragrance.

[0019] (Aspect 6) The absorbent article according to any one of Aspects 1 to 5, wherein the fragrance application area extends in the longitudinal direction or the width direction.

[0020] According to Aspect 6, the fragrance is released over a wide range in the longitudinal direction or the width direction of the absorbent article, and the effect of the fragrance is exerted.

[0021] (Aspect 7) The absorbent article according to any one of Aspects 1 to 6, having an absorbent body including the absorbent core and a waist portion, wherein the non-bonded portion having a portion overlapping with the fragrance application area extends in the longitudinal direction and has an opening that opens at one end of the absorbent body in the longitudinal direction, and is continuous in the longitudinal direction from the fragrance application area to the opening.

[0022] According to Aspect 7, the fragrance can diffuse to the end of the absorbent body within the space between the leak-proof sheet and the non-skin-side sheet. Thereafter, the fragrance is released from the opening to the outside of the absorbent body, and is also easily released to the outside of the absorbent article. Therefore, the user can easily feel the fragrance.

[0023] (Aspect 8) The absorbent article according to Aspect 7, It has a cover sheet that covers one end of the absorbent body in the longitudinal direction from the skin side. When the absorbent article in the deployed state is viewed in the thickness direction, the opening of the non-bonded portion has a portion that overlaps with a second non-bonded portion where the cover sheet is not bonded to the body circumference portion and the absorbent body.

[0024] According to Aspect 8, the fragrance is released from the opening overlapping the second non-bonded portion to the outside of the absorbent body, making it easier to be released to the outside of the absorbent article. Also, by pressing the cover sheet, it is possible to suppress the space between the leak-proof sheet and the non-skin-side sheet from being crushed, and the fragrance can volatilize and stay in the space.

[0025] (Aspect 9) The absorbent article according to Aspect 7 or 8, In the body circumference portion, a plurality of body circumference elastic members that expand and contract in the width direction are arranged in the longitudinal direction. The longitudinal interval between the opening of the non-bonded portion and the body circumference elastic member closest to the opening on one side in the longitudinal direction of the opening is larger than the average interval between the body circumference elastic members adjacent in the longitudinal direction in the body circumference portion on one side in the longitudinal direction.

[0026] According to Aspect 9, the body circumference portion near the opening can be made to closely adhere to the wearer by the elastic member, suppressing the opening from being crushed. Therefore, the fragrance is released from the opening to the outside of the absorbent body, making it easier to be released to the outside of the absorbent article.

[0027] (Aspect 10) The absorbent article according to any one of Aspects 1 to 9, It has a printed portion visible from the non-skin surface side of the absorbent article. When the absorbent article in the deployed state is viewed in the thickness direction, in the central region when the absorbent article is divided into three in the longitudinal direction, the fragrance application region does not overlap with the printed portion.

[0028] According to Aspect 10, in the central region, it is possible to prevent the ink of the printed portion from inhibiting the volatilization and external release of the fragrance, and the effect of the fragrance can be firmly obtained.

[0029] (Aspect 11) The absorbent article according to any one of Aspects 1 to 10, wherein the perfume application area and the joint where the leak-proof sheet and the non-skin side sheet are joined extend in the longitudinal direction, and the perfume application area is located between a plurality of the joints arranged in the width direction, and the widthwise interval between the adjacent joints sandwiching the perfume application area is wider than the widthwise interval between the adjacent joints not sandwiching the perfume application area.

[0030] According to Aspect 11, the width of the non-joined part having a portion overlapping the perfume application area becomes wider, and the width of the space between the leak-proof sheet and the non-skin side sheet becomes wider. Therefore, the perfume is likely to volatilize and remain in the space.

[0031] (Aspect 12) The absorbent article according to any one of Aspects 1 to 11, wherein it has an absorbent main body including the absorbent core and a body circumferential part, the body circumferential part has an elastic region that expands and contracts in the width direction and a non-elastic region, the perfume application area extends in the longitudinal direction and a plurality are arranged in the width direction, and when the absorbent article in the unfolded state is viewed in the thickness direction, each part of the plurality of perfume application areas located in the body circumferential part overlaps the non-elastic region.

[0032] According to Aspect 12, the perfume can be arranged in a region outside the region where wrinkles are likely to be formed in the absorbent article by the elastic member, the perfume is likely to volatilize, and is likely to be released to the outside of the absorbent article.

[0033] (Aspect 13) The absorbent article according to any one of Aspects 1 to 12, wherein it has an elastic member that expands and contracts in the width direction, and the non-joined part having a portion overlapping the perfume application area is orthogonal to the elastic member.

[0034] According to Aspect 13, due to the contraction of the elastic member, the leak-proof sheet and the non-skin side sheet are bent outward in the thickness direction, and a space is likely to be formed. Therefore, the perfume is likely to volatilize into the space and is also likely to remain in the space.

[0035] (Aspect 14) An absorbent article according to any one of Aspects 1 to 13, wherein a joint portion where the leak-proof sheet and the non-skin-side sheet are joined extends linearly in the predetermined direction, and a maximum width of the fragrance application region in a direction orthogonal to the predetermined direction is larger than a maximum width of the joint portion.

[0036] According to Aspect 14, a width of the fragrance application region is ensured, the fragrance is likely to volatilize, and the user is likely to feel the fragrance.

[0037] (Aspect 15) A method for manufacturing an absorbent article having a width direction, a longitudinal direction, and a thickness direction that are orthogonal to each other in a deployed state, a liquid-absorbent absorbent core, a leak-proof sheet provided on the non-skin side of the absorbent core, and a non-skin-side sheet provided on the non-skin side of the leak-proof sheet, the method comprising: a step of applying a fragrance to a skin-side surface of the non-skin-side sheet to form a fragrance application region; and a step of applying an adhesive to the skin-side surface of the non-skin-side sheet so that, when the absorbent article in the deployed state is viewed in the thickness direction, the fragrance application region has a portion overlapping a non-joint portion where the leak-proof sheet and the non-skin-side sheet are not joined.

[0038] According to Aspect 15, the fragrance is disposed on the more non-skin side of the absorbent article, and the fragrance is likely to be released to the outside, so that the user is likely to feel the fragrance. Further, in the non-joint portion, the fragrance is likely to volatilize and stay in the space between the leak-proof sheet and the non-skin-side sheet, so that the sustainability of the fragrance can be enhanced while effectively utilizing the fragrance.

[0039] (Aspect 16) A method for manufacturing an absorbent article according to Aspect 15, wherein after the step of applying the adhesive, the step of forming the fragrance application region is performed.

[0040] According to Aspect 16, in the step of applying the adhesive, it is possible to prevent the fragrance from being removed by a nozzle or the like, and the fragrance can be fixed to the absorbent article.

[0041] ===Embodiment=== As an example of the absorbent article according to the present embodiment, a pant-type disposable diaper for infants will be described as an example. However, the absorbent article according to the present embodiment is not limited to the above, and can also be applied, for example, as an adult pant-type disposable diaper, a short-type napkin, a tape-type disposable diaper, a urine collection pad, a sanitary napkin, a pet diaper, etc.

[0042] ===Basic configuration of the pant-type disposable diaper 1=== FIG. 1 is a schematic perspective view of the pant-type disposable diaper 1 (hereinafter also referred to as "diaper 1") seen from the ventral side. FIG. 2 is a schematic plan view of the diaper 1 in the unfolded and stretched state seen from the skin side. FIG. 3 is a schematic cross-sectional view taken along line AA in FIG. 2.

[0043] The unfolded state of the diaper 1 is a state in which a pair of side joints 2 provided on both sides of the diaper 1 are separated from each other, and the diaper 1 is opened and flattened. The stretched state of the diaper 1 indicates a state in which the elastic member provided in the diaper 1 is stretched to the extent that the wrinkles of the diaper 1 are no longer visible. Specifically, it indicates a state in which the dimensions of each member constituting the diaper 1 are extended until they match or are close to the dimensions of the member alone (that is, the dimensions in a state where the elasticity of the elastic member is not exhibited).

[0044] As shown in FIG. 1, the diaper 1 has a vertical direction, a width direction, and a front-back direction that are perpendicular to each other, and a waist opening BH and a pair of leg openings LH are formed in the diaper 1. In the front-back direction, the side on the ventral side of the wearer is defined as the front side, and the side on the dorsal side of the wearer is defined as the rear side. Further, in the unfolded state, the diaper 1 has a width direction, a longitudinal direction, and a thickness direction that are perpendicular to each other. The side that contacts the wearer in the thickness direction is defined as the skin side, and the opposite side is defined as the non-skin side.

[0045] The diaper 1 has an absorbent body 10 and waist circumferential parts 20 and 30 arranged on the non-skin side of the absorbent body 10. The diaper 1 of the present embodiment is a so-called three-piece type, and the waist circumferential parts include a ventral waist circumferential part 20 and a dorsal waist circumferential part 30. At the part of the absorbent body 10 below the ventral waist circumferential part 20 and the dorsal waist circumferential part 30, the non-skin side surface thereof is exposed to the outside.

[0046] The non-skin side surface of the front end in the longitudinal direction of the absorbent body 10 is joined to the skin side surface of the ventral waist circumferential part 20 by an adhesive or the like, and the non-skin side surface of the rear end in the longitudinal direction of the absorbent body 10 is joined to the skin side surface of the dorsal waist circumferential part 30 by an adhesive or the like. From the diaper 1 in the unfolded state of FIG. 2, the absorbent body 10 is folded in half so that the ventral waist circumferential part 20 and the dorsal waist circumferential part 30 face each other, and both side parts in the width direction of the ventral waist circumferential part 20 and both side parts in the width direction of the dorsal waist circumferential part 30 are joined by welding (for example, heat welding or ultrasonic welding) or the like to form a pair of side joints 2, whereby the diaper 1 becomes a pants type.

[0047] The absorbent body 10 has a liquid-permeable top sheet 11, a liquid-absorbent absorbent core 12, a leak-proof sheet 13 provided on the non-skin side of the absorbent core 12 and being liquid-impermeable or hardly liquid-permeable, and an outer sheet 14 (non-skin side sheet) provided on the non-skin side of the leak-proof sheet 13, and they are adhered by an adhesive or the like respectively. The longitudinal direction of the diaper 1 in the unfolded state corresponds to the longitudinal direction of the absorbent body 10 and corresponds to the vertical direction of the diaper 1 in the pants type state.

[0048] Examples of the absorbent core 12 include those obtained by forming a liquid-absorbent fiber such as pulp fiber containing a superabsorbent polymer into a predetermined shape. The absorbent core 12 may be covered with a core wrap sheet 17 such as a liquid-permeable tissue paper or non-woven fabric. In addition, examples of the absorbent core 12 include a SAP sheet obtained by attaching a SAP layer to a hydrophilic sheet, and an airlaid sheet obtained by forming liquid-absorbent fibers into a sheet shape by the airlaid method. Examples of the top sheet 11 and the outer sheet 14 include non-woven fabrics. Examples of the leak-proof sheet 13 include resin films.

[0049] The absorbent body 10 has leak - proof wall portions 16 that can stand up on the skin side at both side portions in the width direction. For example, both side portions in the width direction of the outer packaging sheet 14 are folded inward in the width direction so as to be located on the skin side surface of the topsheet 11, and a leak - proof wall elastic member 161 (for example, thread rubber) that expands and contracts in the longitudinal direction (vertical direction) is provided at the folded portion, whereby the leak - proof wall portion 16 is formed. Also, although not shown, the absorbent body 10 may have leg - around elastic members (for example, thread rubber) that expand and contract in the longitudinal direction at both side portions in the width direction. Thereby, the diaper 1 fits around the wearer's legs.

[0050] As shown in FIG. 3, the ventral body - around portion 20 and the dorsal body - around portion 30 each have a skin - side sheet 21, 31 made of a flexible non - woven fabric or the like, a non - skin - side sheet 22, 32, and a plurality of body - around elastic members 23, 33 (for example, thread rubber) that expand and contract in the width direction. The plurality of body - around elastic members 23, 33 are arranged side by side at intervals in the vertical direction (longitudinal direction) in the body - around portions 20, 30 and are fixed to the sheet in a state of being stretched in the width direction. Therefore, the ventral body - around portion 20 and the dorsal body - around portion 30 are stretchable in the width direction and fit around the wearer's body.

[0051] The basic configuration of the diaper 1 has been described above, but the configuration of the diaper 1 is not limited to the above. For example, the diaper 1 may be a two - piece type diaper, or the ventral body - around portion 20 and the dorsal body - around portion 30 may be formed of a single continuous member, or an outer member for the crotch portion that connects the ventral body - around portion 20 and the dorsal body - around portion 30 may be provided. Even in that case, the portion of the diaper 1 (outer member) that overlaps with the side joint portion 2 in the longitudinal direction is defined as the body - around portion. Also, the body - around elastic members 23, 33 and the leg - around elastic members may be sheet - like elastic members (stretchable films or stretchable non - woven fabrics) instead of thread rubber.

[0052] ===First Embodiment (Fragrance Application Region 40)=== Figs. 4 to 6 are explanatory views of the fragrance application area 40. Fig. 4 is a schematic plan view of the absorbent body 10 when the diaper 1 in the unfolded state is viewed in the thickness direction. Figs. 5A and 5B are enlarged views of a part of Fig. 4 and show the coating steps of the adhesive HMA and the fragrance. Fig. 6 is an enlarged cross-sectional schematic view of a part of Fig. 4. Figs. 7 and 8 are views showing modified examples of the fragrance application area 40 and the non-bonding portion 50.

[0053] A fragrance is applied to the diaper 1 of the present embodiment. The fragrance is an isolated fragrance or a fragrance composition composed of a plurality of types of fragrances, and in addition to the fragrance, a solvent (for example, isopropyl myristate) is contained. As the fragrance, for example, a mixture of a synthetic fragrance having a fragrance tone close to citronellal and lemongrass oil can be adopted. Also, a mixture of a synthetic fragrance having a fragrance tone close to citronellal and citronellal may be used.

[0054] Moreover, the fragrance of this embodiment has a component that exhibits an insect repellent function. The component that exhibits an insect repellent function is a component that functions as a repellent (insect repellent agent) against pests such as mosquitoes, black flies, midges, and flies. As such a component, it is desirable to contain at least one of citronellal and azadirachtin. Further, as such a component, in addition to the above components, menthol, α-terpinene, linalyl acetate, lavandulol, isopulegol, benzyl acetate, ethyl linalool, menthane, camphene, tetrahydrolinalool, dihydrolinalool, dihydromyrcenol, osimenol, terpinyl acetate, isobornyl acetate, geranyl formate, p-menthane-3,8-diol, 2-(tert-butyl) cyclohexyl acetate, dihydroterpinyl acetate, mugol, myrcenol, nerol, phenylethyl acetate, 4-tert-butylcyclohexyl acetate, citronellyl acetate, neryl acetate, anisyl acetate, geranyl acetate, ethyl linalyl acetate, tricyclodecenyl acetate, cinnamyl acetate, etc. may be mentioned, and it is desirable to contain at least one of the above components. With the diaper 1 having such a component that exhibits an insect repellent function, an insect repellent function can be exhibited during wearing.

[0055] However, it is not limited to the fragrance having an insect repellent function against insects. As long as it is a fragrance, it is not particularly limited, and for example, a fragrance that exhibits a function of masking the odor of excreted liquid, a fragrance that exhibits a function of relieving the depression of the user of the diaper 1, etc. may be used.

[0056] As shown in FIG. 3, the diaper 1 has a fragrance application area 40 coated with a fragrance on the non-skin side of the leak-proof sheet 13. The fragrance application area 40 is an area where the fragrance is applied and arranged in the diaper 1. In the diaper 1 of the present embodiment, the fragrance is applied to the skin side surface of the outer sheet 14 in the manufacturing process. However, it is only necessary that part or all of the fragrance is applied (arranged) on the non-skin side of the leak-proof sheet 13, and the fragrance may be applied to the non-skin side surface of the leak-proof sheet 13 or the non-skin side surface of the outer sheet 14. The fragrance of the present embodiment is a volatile substance and is applied in a liquid state.

[0057] Also, as shown in FIG. 2, the fragrance application area 40 extends linearly in the longitudinal direction (predetermined direction). In the present embodiment, two fragrance application areas 40 extending in the longitudinal direction are arranged side by side with a space in the width direction.

[0058] In FIG. 4, a joint portion 51 where the leak-proof sheet 13 and the outer sheet 14 are joined and a non-joint portion 50 where the two sheets (13, 14) are not joined are shown. In the present embodiment, a plurality of joint portions 51 and a plurality of non-joint portions 50 each extend linearly in the longitudinal direction and are arranged alternately in the width direction. As a joining method of the joint portion 51, a joining method using an adhesive such as a hot melt adhesive HMA is exemplified. However, the present invention is not limited to this, and a joining method such as welding or pressure bonding may be used.

[0059] The fragrance application area 40 is located in the non-joint portion 50 between the joint portions 51 arranged in the width direction. Therefore, when the diaper 1 in the unfolded state is viewed in the thickness direction (see FIG. 4), the fragrance application area 40 has a portion overlapping the non-joint portion 50 where the leak-proof sheet 13 and the outer sheet 14 (non-skin side sheet) are not joined. In the present embodiment, all of the fragrance application area 40 does not overlap with the joint portion 51 (adhesive HMA) but overlaps with the non-joint portion 50.

[0060] In the case of an absorbent article having an elastic member like the diaper 1, as shown in FIG. 2, it is preferable to confirm the positional relationship between the fragrance application area 40 and the non-joint portion 50 in a state where the absorbent article is unfolded and stretched. The same applies when specifying or comparing lengths and positions below.

[0061] According to the above, compared with the case where the fragrance application area 40 is arranged on the skin side rather than the leak-proof sheet 13, the fragrance is located more outside (non-skin side) of the diaper 1 and is more likely to be released outside the diaper 1. In particular, the leak-proof sheet 13 is made of a liquid-impermeable film or the like, and since it is more difficult for the fragrance to pass through than non-woven fabric or the like, according to the above, the fragrance is more likely to be released outside the diaper 1. Therefore, it becomes easier for the user (a child or a caregiver who is the wearer) to feel the fragrance, and it is easier to receive the impression that the effect of the fragrance (insect repellent function) is obtained, and the diaper 1 can be used with confidence. In fact, since the fragrance is more likely to be released outside the diaper 1, the insect repellent function is enhanced.

[0062] The type of the outer sheet 14 is not particularly limited, but in this embodiment, it is a non-woven fabric. By doing so, it becomes easier for the fragrance to pass through the gaps between the fibers of the outer sheet 14, and it becomes easier for the fragrance to be released to the outside of the diaper 1.

[0063] Also, by arranging the fragrance linearly and long in a predetermined direction (here, the longitudinal direction), the effect of the fragrance (insect repellent function) is exerted over a wide range in the predetermined direction of the diaper 1. Also, when applying a certain amount of fragrance to the diaper 1, compared with the case of applying the fragrance planarly, for example, over the entire plane of the leak-proof sheet 13, applying the fragrance linearly and long increases the basis weight of the fragrance (the amount of fragrance per unit area). By applying the fragrance thickly, the volatilization speed of the fragrance can be suppressed. That is, while suppressing the amount of fragrance applied to the diaper 1, the basis weight of the fragrance can be increased, and the persistence of the fragrance can be enhanced.

[0064] Also, the fact that the fragrance application area 40 overlaps with the non-bonded portion 50 means that, as shown in FIG. 6, the fragrance is applied to a portion where the leak-proof sheet 13 and the exterior sheet 14 are separated in the thickness direction. In the non-bonded portion 50, the density of the material is lower and the air permeability resistance is lower compared to the bonded portion 51. Also, in the non-bonded portion 50, the volatilization of the fragrance is not inhibited by the adhesive (HMA). Therefore, in the non-bonded portion 50, the fragrance easily volatilizes into the space formed by the separation of the two sheets (13, 14), and the fragrance applied to the diaper 1 can be effectively utilized. Also, since the fragrance can be retained in the space, the persistence of the fragrance is also enhanced. As described above, according to the diaper 1 of the present embodiment, while the persistence of the fragrance is enhanced, it becomes easier for the user to perceive the fragrance.

[0065] Note that the fact that the fragrance application area 40 extends linearly in a predetermined direction means that the length of the fragrance application area 40 in the predetermined direction (here, the longitudinal direction) is longer than the length in the direction orthogonal to the predetermined direction (here, the width direction). It is preferable that the width of the fragrance application area 40 in the direction orthogonal to the predetermined direction is about 20 mm or less. By doing so, the width of the non-bonded portion 50 can also be suppressed in accordance with the fragrance application area 40, and peeling of the two sheets (13, 14) or floating of the sheet due to an increase in the width of the non-bonded portion 50 can be prevented. Also, the predetermined direction is not limited to the longitudinal direction. The fragrance application area 40 may extend in the width direction as shown in FIG. 11 described later, or may extend in a direction inclined with respect to the longitudinal direction and the width direction (not shown). Also, the linear shape is not limited to the straight line shape shown in FIG. 4, and the fragrance may be arranged in a curved shape as shown in FIG. 7A. Also, the fragrance may be arranged on the diaper 1 in a well-known curved pattern such as an Ω pattern or a spiral pattern. Also, as shown in FIG. 8A, the fragrance application area 40 may extend to the longitudinal ends 10a, 10b of the absorbent body 10. The above is an example, and the fragrance application area 40 only needs to extend linearly in a predetermined direction, and the number, length, and arrangement position of the fragrance application areas 40 are not particularly limited.

[0066] The shape, size, and position of the fragrance application area 40 can be confirmed by well-known methods. For example, in the fragrance application area 40, since the material gets wet, it has a different color and taste from the surroundings (for example, when the fragrance is applied to a white non-woven fabric, the whiteness of the fragrance application area 40 increases), and the fragrance application area 40 can be identified visually. In addition, the target material (for example, the outer sheet 14) can be taken out from the diaper 1 and finely partitioned to form a plurality of samples, and a method of component analysis of each sample using a gas chromatograph-mass spectrometer (for example, GCMS-QP2010 Plus manufactured by Shimadzu Corporation or an equivalent device) can be exemplified. The fragrance application area 40 may be identified based on whether the finely partitioned sample contains fragrance. Also, the fragrance may be contained in microcapsules, and in that case, the presence or absence of microcapsules can be confirmed using an electron microscope or the like, and the fragrance application area 40 can be identified.

[0067] Also, the fragrance application area 40 only needs to have a portion overlapping with the non-joined portion 50. A part of the fragrance application area 40 may overlap with the non-joined portion 50, and another part may overlap with the joined portion 51 (adhesive HMA). For example, in the modified example shown in FIG. 7B, the joined portion 51 extending in the longitudinal direction while meandering in the width direction overlaps with the fragrance application area 40. Also, in the modified example shown in FIG. 7C, the joined portion 51 is intermittently positioned in the longitudinal direction and intermittently overlaps with the fragrance application area 40 in the longitudinal direction. In these cases as well, the fragrance overlapping with the non-joined portion 50 is likely to volatilize and stay in the space between the two sheets (13, 14).

[0068] However, in FIG. 7B, the portion where the fragrance application area 40 and the non-joined portion 50 overlap is longitudinally divided by the joined portion 51 crossing the fragrance application area 40. Also, in FIG. 7C, the portion where the fragrance application area 40 and the non-joined portion 50 overlap becomes shorter in the longitudinal direction.

[0069] On the other hand, in the present embodiment, when the diaper 1 in the unfolded state is viewed in the thickness direction, the fragrance application area 40 continuously has a portion overlapping with the non-joined portion 50 from one end 40a to the other end 40b in the longitudinal direction (predetermined direction).

[0070] In this case, since the space between the two sheets (13, 14) extends continuously in the longitudinal direction, the fragrance easily volatilizes into the space and easily diffuses in the longitudinal direction. Thus, the effect of the fragrance (insect repellent effect) is exerted over a wide range in the longitudinal direction of the diaper 1. Also, the fragrance can be retained in the space extending in the longitudinal direction, and the persistence of the fragrance can be enhanced.

[0071] Also, although not shown, for example, the position of the pattern of the joint portion 51 shown in FIG. 7B may be shifted in the width direction, or the width of the pattern of the joint portion 51 may be shorter than the width of the fragrance application region 40, and the joint portion 51 may overlap only a part of the fragrance application region 40 in the width direction. Also in this case, the remaining part of the fragrance application region 40 in the width direction can continuously have a portion overlapping with the non-joint portion 50 from one longitudinal end 40a to the other longitudinal end 40b.

[0072] However, preferably, like the fragrance application region 40 of the present embodiment, its entire area overlaps with the non-joint portion 50 and does not overlap with the joint portion 51 (adhesive HMA) at all. By doing so, more fragrance volatilizes into the space between the two sheets (13, 14) and easily remains in that space.

[0073] Also, as shown in FIG. 4, when the length of the fragrance application region 40 in the longitudinal direction is shorter than that of the leak-proof sheet 13 and the outer sheet 14, it is preferable that the non-joint portion 50 is continuous in the longitudinal direction also on the extension line in the longitudinal direction of the fragrance application region 40. That is, it is preferable that the non-joint portion 50 continuously extends in the longitudinal direction from one or both longitudinal ends 40a, 40b of the fragrance application region 40 to the longitudinal ends of both sheets (13, 14). By doing so, the fragrance can further diffuse in the longitudinal direction, and the effect of the fragrance is exerted over a wide range in the longitudinal direction of the diaper 1.

[0074] Also, as shown in FIG. 2, when the diaper 1 in the unfolded state is viewed in the thickness direction, it is preferable that the fragrance application region 40 has a portion overlapping with the absorbent core 12. Like the fragrance application region 40 of the present embodiment, all of it may overlap with the absorbent core 12, or a part of the fragrance application region 40 may overlap with the absorbent core 12.

[0075] According to the above, during the use of the diaper 1, when the absorbent core 12 absorbs the excreted liquid, the humidity of the air in the space (non-bonded portion 50) between the two sheets (13, 14) where the fragrance application area 40 is located increases. Therefore, the volatilized fragrance combines with the high-humidity air, making it easier for the fragrance to stay in the space and enhancing the persistence of the fragrance. Furthermore, it is preferable that the leak-proof sheet 13 is a film having moisture permeability. By doing so, while preventing the leakage of excreted liquid, the high-humidity air around the absorbent core 12 migrates to the space between the leak-proof sheet 13 and the outer sheet 14, making it easier to combine with the fragrance. Therefore, the persistence of the fragrance can be enhanced.

[0076] Also, when the diaper 1 in the unfolded state is viewed in the thickness direction, it is preferable that the fragrance application area 40 has a portion overlapping with the central area 1C when the diaper 1 is divided into three in the longitudinal direction. As shown in FIG. 2, in the longitudinal direction in which the fragrance application area 40 extends, the fragrance application area 40 may be located over the entire area of the central area 1C, or the fragrance application area 40 may be located in a part of the central area 1C.

[0077] The central area 1C of the diaper 1 corresponds to the crotch of the wearer. Therefore, according to the above, the fragrance application area 40 is located in a portion corresponding to the wearer's around the legs (crotch). Therefore, the fragrance is easily released to the wearer's around the legs exposed from the diaper 1, and the insect repellent function of the fragrance acts effectively.

[0078] Preferably, in the case of the pants-type diaper 1, as shown in FIG. 2, it is preferable that the fragrance application area 40 extends in the longitudinal direction from the lower end of the ventral side joint portion 2 to the lower end of the dorsal side joint portion 2. By doing so, the effect of the fragrance (insect repellent function) is more surely exhibited around the wearer's legs exposed from the diaper 1.

[0079] FIG. 9 is a schematic plan view of the diaper 1 in the unfolded and extended state as viewed from the non-skin side. FIG. 10 is a view showing a modified example of the fragrance application area 40. The diaper 1 has waist elastic members 23, 33 (elastic members) that expand and contract in the width direction at the waist portions 20, 30. Further, the fragrance application areas 40 extend in the longitudinal direction and are arranged in a plurality (here, two) in the width direction. In this case, it is preferable that the waist elastic members 23, 33 and the plurality of fragrance application areas 40 overlap in the width direction on at least one side of the ventral side and the dorsal side.

[0080] For example, as shown in FIG. 9, the positions in the width direction of the two fragrance application areas 40 coincide with the positions in the width direction of the upper waist elastic member 23 from the sixth waist elastic member 23c from the bottom in the ventral waist portion 20. Therefore, the two fragrance application areas 40 overlap with the ventral waist elastic member 23 in the width direction. Similarly, the positions in the width direction of the two fragrance application areas 40 coincide with the positions in the width direction of the upper waist elastic member 33 from the fifth waist elastic member 33c from the bottom in the dorsal waist portion 30. Therefore, the fragrance application area 40 overlaps with the dorsal waist elastic member 33 in the width direction.

[0081] By doing so, the contraction force in the width direction of the waist elastic members 23, 33 reduces the interval between the plurality of fragrance application areas 40 arranged in the width direction. Therefore, the amount of fragrance per unit area increases, making it easier for the user to feel the fragrance. Particularly in the natural state (unloaded state) of the diaper 1 before wearing, the interval between the plurality of fragrance application areas 40 becomes narrower. Therefore, it is easier for the user to feel the fragrance before using the diaper 1, and the user can be expected to experience the effect of the fragrance.

[0082] Further, not limited to the pant-type diaper 1, for example, in a tape-type diaper, an elastic member that expands and contracts in the width direction may be provided at the dorsal waist portion. It is preferable that the elastic member and the plurality of fragrance application areas 40 overlap in the width direction.

[0083] Furthermore, as shown in the modification example of FIG. 10A, the two fragrance application areas 40 may extend upward and directly intersect the body circumferential elastic members 23c and 23d. Alternatively, as shown in the modification example of FIG. 10B, there may be no non-elastic region NS described later in the body circumferential portion (here, the ventral body circumferential portion 20), and the body circumferential elastic member 23 may continuously exhibit elasticity in the width direction between the pair of side joints 2. Thereby, the two fragrance application areas 40 directly intersect the body circumferential elastic members 23a and 23b. In these cases, the contraction forces of the body circumferential elastic members 23 and 33 directly act on the plurality of fragrance application areas 40 arranged in the width direction, and the intervals therebetween are more likely to be narrowed, so that the user can more easily feel the fragrance.

[0084] In addition, the body circumferential portions 20 and 30 have an elastic region that expands and contracts in the width direction by the body circumferential elastic members 23 and 33, and a non-elastic region NS. In FIG. 9, only the portions of the body circumferential elastic members 23 and 33 where elasticity is exhibited are shown. Therefore, in the body circumferential portions 20 and 30 of FIG. 9, the body circumferential elastic members 23 and 33 are not located at the central portion in the width direction and at the portion overlapping the absorbent body 10, and the non-elastic region NS is formed. The non-elastic region NS is formed, for example, by cutting a part of the body circumferential elastic members 23 and 33. Since the non-elastic region NS can suppress the contraction in the width direction of the absorbent core 12 and make it flat, the absorption area of the absorbent core 12 can be ensured, and the discomfort during wearing can be reduced.

[0085] Then, the plurality of fragrance application areas 40 extending in the longitudinal direction and arranged in the width direction may overlap the non-elastic region NS in the width direction. Further, the plurality of fragrance application areas 40 are preferably located closer to the center side than the outer ends (the arrangement positions of the body circumferential elastic members 23c and 33c) of the non-elastic region NS in the longitudinal direction. That is, when the diaper 1 in the unfolded state is viewed in the thickness direction, each part of the plurality of fragrance application areas 40 located in the body circumferential portions 20 and 30 may overlap the non-elastic region NS.

[0086] By doing so, the plurality (here, two) of fragrance application regions 40 are located in regions outside the regions where the body circumferential elastic members 23 and 33 cause the diaper 1 to contract and wrinkles are likely to be formed. Therefore, the fragrance is likely to volatilize and is likely to be released to the outside of the diaper 1. Therefore, the fragrance applied to the diaper 1 can act effectively. Also, the interval in the width direction of the plurality of fragrance application regions 40 is ensured, and the fragrance is released over a wide range in the width direction of the diaper 1.

[0087] Also, in the present embodiment, all of the portions of the fragrance application regions 40 located in the body circumferential portions 20 and 30 overlap with the non-stretch regions NS. However, the fragrance application regions 40 overlap with the body circumferential elastic members 23 and 33 above them in the width direction. Therefore, at the body circumferential portions 20 and 30 close to the noses of the wearer or the person changing the diaper 1, the interval in the width direction of the two fragrance application regions 40 is appropriately narrowed by the body circumferential elastic members 23 and 33, making it easier for the wearer or the person changing the diaper to sense the fragrance.

[0088] FIG. 11 is a view showing a modified example of the fragrance application region 40 and the non-bonding portion 50, and is a schematic plan view of the diaper 1 in a deployed and stretched state. The fragrance application region 40 preferably extends in the longitudinal direction or the width direction of the diaper 1. That is, the predetermined direction may be the longitudinal direction or the width direction of the diaper 1. When the fragrance application region 40 extends in the longitudinal direction as in the present embodiment, the fragrance application region 40 can be arranged longer than when it extends in the width direction. Therefore, the fragrance is released over a wide range in the longitudinal direction of the diaper 1, and the effect of the fragrance is exhibited.

[0089] Also, when the fragrance application region 40 extends in the longitudinal direction, it is preferable that the fragrance application region 40 is located across the center line CL in the longitudinal direction of the diaper 1 in the deployed state. By doing so, the fragrance can be arranged in the portion corresponding to the crotch of the wearer. Therefore, the fragrance is released to the circumference of the wearer's leg exposed from the diaper 1, and the insect repellent function acts effectively.

[0090] On the one hand, as shown in FIGS. 11A and 11B, when the fragrance application area 40 extends in the width direction, the fragrance can be applied over a wide range in the width direction of the diaper 1. Therefore, the fragrance is released over a wide range in the width direction of the diaper 1, and the effect of the fragrance is exerted.

[0091] When the fragrance application area 40 extends in the width direction, as shown in FIG. 11A, it may be located biased toward the ventral side in the longitudinal direction (ventral side in the longitudinal direction relative to the center line CL). In this case, it becomes difficult for the fragrance application area 40 to be crushed by the wearer's body in the supine sleeping position. Therefore, the fragrance is likely to volatilize and is likely to be released to the outside of the diaper 1. Also, since it is easy to urinate on the ventral side of the diaper 1, the fragrance is likely to combine with the high-humidity air, and the persistence of the fragrance is likely to increase.

[0092] Or, as shown in FIG. 11B, it may be located biased toward the dorsal side in the longitudinal direction (dorsal side in the longitudinal direction relative to the center line CL). Since the buttocks protrude on the dorsal side, the diaper 1 is likely to spread in the width direction without wrinkles. Therefore, it is difficult for the fragrance to be trapped in the wrinkles of the diaper 1, the fragrance is likely to volatilize, and the fragrance is likely to be released to the outside of the diaper 1. However, not limited to the above, the fragrance application area 40 may be provided on both the dorsal side and the ventral side in the longitudinal direction relative to the center line CL.

[0093] Also, as shown in FIG. 4, the non-joined portion 50 having a portion overlapping with the fragrance application area 40 preferably extends in the longitudinal direction and has an opening 50o that opens at one end of the absorbent body 10 in the longitudinal direction. In the present embodiment, the openings 50o of the non-joined portion 50 are formed at both the ventral end 10a and the dorsal end 10b of the absorbent body 10. And it is preferable that the non-joined portion 50 is continuous in the longitudinal direction from the portion overlapping with the fragrance application area 40 to the opening 50o.

[0094] By doing so, the fragrance volatilized from the fragrance application area 40 can diffuse into the non-joined portion 50 that continues to the longitudinal opening 50o without being blocked by the joining portion 51. Thereafter, the fragrance is released from the opening 50o to the outside of the absorbent body 10, and it becomes easier for the fragrance to be released to the outside of the diaper 1. Therefore, it becomes easier for the user to perceive the fragrance, and the effect of the fragrance (insect repellent function) is enhanced.

[0095] FIG. 12 is a diagram showing an example of the non-joined portion 52 of the cover sheet 24. In FIG. 12, only the joining portions 51 arranged with the fragrance application area 40 in between are shown in order to prevent the complexity of the drawing. As shown in FIGS. 2 and 3 described above, the diaper 1 has cover sheets 24 and 34 that cover the upper end of the absorbent body 10 in the longitudinal direction from the skin side. In the present embodiment, cover sheets 24 and 34 are provided on both the ventral side and the dorsal side. By the cover sheets 24 and 34, it is possible to suppress the upper end edge of the absorbent body 10 from digging into the wearer's skin and to suppress the mouth opening of the absorbent body 10. Note that the cover sheets 24 and 34 of the present embodiment are sheets of separate materials from the skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32, but may cover the upper end of the absorbent body 10 at the folded-back portions of the skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32, and the folded-back portions may also be used as cover sheets.

[0096] The cover sheets 24 and 34 are joined to the skin side surfaces of the body surrounding portions 20 and 30 and the skin side surface of the absorbent body 10 by an adhesive such as a hot melt adhesive HMA. However, the joining method of the cover sheets 24 and 34 may be a joining method such as welding or pressure bonding. In the following description, the portion where the cover sheets 24 and 34 are joined to the body surrounding portions 20 and 30 and the absorbent body 10 is also referred to as the second joining portion 53. The portion where the cover sheets 24 and 34 are not joined to the body surrounding portions 20 and 30 and the absorbent body 10 is also referred to as the second non-joined portion 52.

[0097] And when the non - joined portion 50 overlapping with the fragrance - applying region 40 extends to one end of the absorbent body 10 in the longitudinal direction and has an opening 50o, the following may be the case. That is, when the diaper 1 in the unfolded state is viewed in the thickness direction, it is preferable that the opening 50o of the non - joined portion 50 has a portion overlapping with the second non - joined portion 52. As shown in FIG. 12, all of the openings 50o may overlap with the second non - joined portion 52, or a part of the openings 50o may overlap with the second joined portion 53 and the remaining part may overlap with the second non - joined portion 52.

[0098] According to the above, it is possible to prevent all of the openings 50o of the non - joined portion 50 from being blocked by the second joined portion 53 (the adhesive HMA for adhering the cover sheets 24 and 34). Therefore, the fragrance is released from the portion of the opening 50o overlapping with the second non - joined portion 52 to the outside of the absorbent body 10, and is also likely to be released to the outside of the diaper 1. In addition, since the pressing of the non - joined portion 50 by the cover sheets 24 and 34 can be reduced, a space is likely to be formed between the leak - proof sheet 13 and the outer cover sheet 14. Therefore, the fragrance is likely to volatilize in the space between the two sheets (13, 14), and the fragrance can be retained in the space.

[0099] In FIG. 12, a plurality of rectangular second joined portions 53 are arranged at intervals in the width direction, but the arrangement pattern of the second joined portions 53 is not particularly limited. Also, in FIG. 12, the ventral cover sheet 24 is illustrated, but it is preferable that the opening 50o of the non - joined portion 50 also has a portion overlapping with the non - joined portion of the cover sheet 34 on the dorsal side.

[0100] Also, the diaper 1 may not have the cover sheets 24 and 34. In that case, the risk that the openings 50o of the non - joined portion 50 are blocked by the joined portions (adhesives) of the cover sheets 24 and 34 or that the non - joined portion 50 is pressed by the cover sheets 24 and 34 and no space is formed can be eliminated.

[0101] FIG. 13 is a diagram for explaining the positional relationship between the circumferential elastic member 23 and the non-joined portion 50. FIG. 14 is a diagram for explaining a modified example of the positional relationship between the circumferential elastic member 23 and the non-joined portion 50. In FIGS. 13 and 14, only the joined portions 51 arranged with the fragrance application region 40 interposed therebetween are shown in order to prevent complexity of the drawing. Further, in FIGS. 13 and 14, only the portions of the circumferential elastic members 23 and 33 that exhibit elasticity are shown.

[0102] As shown in FIG. 13, the non-joined portion 50 having a portion overlapping with the fragrance application region 40 may be orthogonal to the circumferential elastic member 23. In FIG. 13, the non-joined portion 50 that overlaps with the fragrance application region 40 and extends in the longitudinal direction is orthogonal to the two circumferential elastic members 23c and 23d on the ventral side. Although not shown, the non-joined portion 50 may be orthogonal to the circumferential elastic member 33 on the dorsal side.

[0103] By doing so, the width of the non-joined portion 50 is narrowed by the contraction force of the circumferential elastic members 23c and 23d. Thereby, as shown in FIG. 6, the leak-proof sheet 13 and the exterior sheet 14 are each convexly bent outward in the thickness direction, and a space is easily formed between the two sheets (13, 14). Therefore, the fragrance easily volatilizes into the space, and the fragrance can be retained in the space.

[0104] In the case of a tape-type diaper, an elastic member that expands and contracts in the width direction may be provided on the dorsal circumferential portion. The elastic member and the non-joined portion 50 may be orthogonal to each other. Further, as shown in FIG. 11, when the fragrance application region 40 extends in the width direction, the non-joined portion 50 sandwiching the fragrance application region 40 may be orthogonal to a leg circumferential elastic member (not shown) that expands and contracts in the longitudinal direction. Also in these cases, the non-joined portion 50 contracts and a space is easily formed between the two sheets (13, 14).

[0105] However, not limited to the above, as shown in the modification example of FIG. 14, the non-joint portion 50 having a portion overlapping with the fragrance application region 40 may not be orthogonal to the body circumferential elastic member 23. Further, when the non-joint portion 50 overlapping with the fragrance application region 40 extends to one end in the longitudinal direction of the absorbent body 10 and has an opening 50o, the following may be the case. First, the longitudinal interval between the opening 50o of the non-joint portion 50 and the body circumferential elastic member 23e closest to the opening 50o on the outer side (one side, here the ventral side) in the longitudinal direction from the opening 50o is defined as the first interval D1. Also, the average value of the intervals between the respective body circumferential elastic members 23 adjacent in the longitudinal direction in the ventral body circumferential portion 20 is defined as the average interval Dave. At this time, the first interval D1 may be larger than the average interval Dave (D1 > Dave).

[0106] The ventral body circumferential portion 20 is in close contact with the wearer by the body circumferential elastic member 23. Therefore, the body circumferential elastic member 23e may be located at a position farther above the opening 50o of the non-joint portion 50, specifically, at a position farther from the average interval Dave of the body circumferential elastic member 23. By doing so, it is difficult for the ventral body circumferential portion 20 to be in close contact with the wearer near the opening 50o of the non-joint portion 50, and it is possible to prevent the opening 50o from being crushed between the wearer and the ventral body circumferential portion 20. Thus, the fragrance is released from the opening 50o to the outside of the absorbent body 10 and is also likely to be released to the outside of the diaper 1. Although the ventral opening 50o is illustrated in FIG. 14, the body circumferential elastic member 33 may also be located at a position farther above the opening 50o on the dorsal side.

[0107] In addition, as shown in FIG. 9, the diaper 1 has a printed portion 60 that is visible from the non-skin side thereof. For example, by printing the printed portion 60 on the leak-proof sheet 13 or the outer sheet 14, the printed portion 60 can be seen from the outside of the diaper 1. Examples of the printed portion 60 include patterns, pictures, symbols, characters, etc. However, the type, number, and arrangement position of the printed portion 60 are not particularly limited. In FIG. 9, there are provided a printed portion 60A in the shape of a star or diamond pattern, a printed portion 60B with characters indicating the size ("M") and the rear side ("BACK") of the diaper 1, and a printed portion 60C with an illustration (lemongrass) and characters ("ANTIMOS") indicating that the diaper 1 has a component (fragrance) that exhibits an insect repellent function. A user who visually recognizes the printed portion 60C can recognize that the insect repellent function is exerted when the diaper 1 is worn or during wear.

[0108] When the diaper 1 in the unfolded state is viewed in the thickness direction, in the central region 1C when the diaper 1 is divided into three equal parts in the longitudinal direction, it is preferable that the fragrance application region 40 does not overlap with the printed portion 60. By doing so, it is possible to prevent the ink of the printed portion 60 from inhibiting the volatilization and external release of the fragrance. The central region 1C corresponds to the crotch portion of the wearer. When the fragrance in that part volatilizes and is released firmly, the insect repellent effect acts effectively around the wearer's legs.

[0109] Preferably, in the absorbent body 10 below the waist and hip portions 20, 30 (side joint portion 2), the fragrance application region 40 and the printed portion 60 do not overlap. More preferably, throughout the diaper 1, the fragrance application region 40 and the printed portion 60 do not overlap. By doing so, it is possible to prevent more of the volatilization and release of the fragrance from being inhibited by the ink.

[0110] Also, as shown in FIG. 5B, the fragrance application area 40 and the joint portion 51 (adhesive HMA) extend in the longitudinal direction, and the fragrance application area 40 is located between a plurality of joint portions 51 arranged in the width direction. The widthwise interval W1 between the adjacent joint portions 51 sandwiching the fragrance application area 40 is preferably wider than the widthwise intervals W2 and W3 between the adjacent joint portions 51 not sandwiching the fragrance application area 40 (W1>W2, W3). Note that the widthwise interval of the joint portion 51 is the interval between the inner ends of the adjacent joint portions 51.

[0111] According to the above, the widthwise interval W1 of the non-joint portion 50 having a portion overlapping with the fragrance application area 40 becomes wider. That is, the width of the space between the two sheets (13, 14) becomes wider. Therefore, the fragrance is likely to volatilize into the wide space, and the fragrance is likely to remain in the wide space.

[0112] Also, in FIG. 5B, the fragrance application area 40 and the joint portion 51 (adhesive HMA) linearly extend in the longitudinal direction, and the maximum width of the fragrance application area 40 in the width direction (the direction orthogonal to the predetermined direction) is smaller than the maximum width of the joint portion 51. Therefore, when applying a predetermined amount of fragrance to the diaper 1, the fragrance can be applied thickly, and the basis weight of the fragrance application area 40 can be increased. Thus, the persistence of the fragrance is enhanced. However, it is not limited to this, and the maximum width of the fragrance application area 40 and the maximum width of the joint portion 51 may be equal.

[0113] Also, as shown in FIG. 8B of the modification example, the maximum width W4 of the fragrance application area 40 may be larger than the maximum width W5 of the joint portion 51 (W4>W5). By doing so, the width of the fragrance application area 40 is ensured, and the fragrance is likely to volatilize. Therefore, it becomes easier for the user to sense the fragrance.

[0114] When the fragrance is applied in a liquid state, the fragrance penetrates and diffuses into the outer sheet 14 (non-woven fabric) compared to the highly viscous adhesive (HMA). Therefore, in the manufacturing process of the diaper 1, even if the maximum width of the fragrance application area 40 is smaller than the maximum width of the joint portion 51, in the manufactured diaper 1, the maximum width of the fragrance application area 40 may be larger than the maximum width of the joint portion 51. In any case, in the manufactured diaper 1, the maximum widths of the fragrance application area 40 and the joint portion 51 are compared.

[0115] ===Second Embodiment (Manufacturing Method of Diaper 1) === Since the basic configuration of the diaper 1 is the same as that of the first embodiment, the description thereof is omitted. The manufacturing method of the diaper 1 according to the second embodiment includes a step of applying a fragrance to the skin side surface of the outer sheet 14 (non-skin side sheet) to form a fragrance application area 40 (FIG. 5B described above), and a step of applying an adhesive to the skin side surface of the outer sheet 14 so that when the diaper 1 in the unfolded state is viewed in the thickness direction, the fragrance application area 40 has a portion overlapping with the non-joint portion 50 where the leak-proof sheet 13 and the outer sheet 14 are not joined (FIG. 5A).

[0116] According to the diaper 1 manufactured by the above manufacturing method, the fragrance application area 40 can be provided on the non-skin side of the leak-proof sheet 13. Therefore, the fragrance is located more outside the diaper 1, and the fragrance is more likely to be released outside the diaper 1, making it easier for the user to feel the fragrance. Also, a part or all of the fragrance application area 40 is located in the non-joint portion 50. Therefore, the fragrance is more likely to volatilize in the space between the two sheets (13, 14) formed in the non-joint portion 50. Therefore, the fragrance applied to the diaper 1 can be effectively utilized. Also, since the fragrance can stay in the space, the persistence of the fragrance can be enhanced. Therefore, the effect of the fragrance can be exerted when the diaper 1 is used. Also, when the outer sheet 14 is a non-woven fabric or the like, by applying the fragrance to the outer sheet 14 instead of the leak-proof sheet 13 which is a liquid-impermeable film or the like, the fragrance is more likely to be fixed (penetrate) to the material (outer sheet 14).

[0117] Preferably, the fragrance may be applied to the outer sheet 14 in a long line in a predetermined direction so that the fragrance application area 40 extends linearly in the predetermined direction. By doing so, the fragrance is applied over a wide range in the predetermined direction of the diaper 1, and the effect of the fragrance is exerted. Further, when applying a predetermined amount of fragrance to the diaper 1, the fragrance can be applied thickly, and the basis weight of the fragrance can be increased, so the persistence of the fragrance is enhanced. Examples of the method of applying the liquid fragrance in a long line in a predetermined direction include an application method using a coater (contact nozzle) and a method of applying the fragrance using a printing technique such as letterpress printing.

[0118] However, in the manufacturing method of the diaper 1 described above, the fragrance does not necessarily have to be applied so as to extend linearly in a predetermined direction. Therefore, the fragrance application area 40 of the diaper 1 manufactured by the above manufacturing method may have various shapes, or the fragrance may be applied to the outer sheet 14 planarly. When the fragrance is not applied linearly, the fragrance can also be applied to the outer sheet 14 using a spraying method.

[0119] Further, it is preferable to perform the step of forming the fragrance application area 40 (FIG. 5B) after the step of applying the adhesive to the outer sheet 14 (FIG. 5A). By doing so, even when the fragrance and the adhesive are applied to the same surface of the outer sheet 14, it is possible to prevent the fragrance from being removed by, for example, the nozzle for applying the adhesive due to the application of the adhesive. Therefore, the fragrance can be surely fixed to the outer sheet 14.

[0120] As described above, the above embodiments are for facilitating the understanding of the present invention and are not for limiting and interpreting the present invention. It goes without saying that the present invention can be changed and improved without departing from its gist, and equivalents thereof are included in the present invention.

Explanation of Signs

[0121] 1 Pant-type disposable diaper (absorbent article), 2 Side joint, 10 Absorbent body, 11 Top sheet, 12 Absorbent core, 13 Leak-proof sheet, 14 Outer sheet (non-skin side sheet), 16 Leak-proof wall part, 17 Core wrap sheet, 20 Ventral body circumference part, 21 Skin side sheet, 22 Non-skin side sheet, 23 Body circumference elastic member, 24 Cover sheet, 30 Dorsal body circumference part, 31 Skin side sheet, 32 Non-skin side sheet, 33 Body circumference elastic member, 34 Cover sheet, 40 Perfume coating area, 50 Non-joining part, 51 Joining part, 52 Second non-joining part, 53 Second joining part, 60 Printing part

Claims

1. having a width direction, a longitudinal direction, and a thickness direction that are orthogonal to each other in the unfolded state, a liquid-absorbent absorbent core, a leak-proof sheet provided on the non-skin side of the absorbent core, an absorbent article having a non-skin side sheet provided on the non-skin side of the leak-proof sheet, wherein on the non-skin side of the leak-proof sheet, there is a fragrance application region where a fragrance is applied, the fragrance application region extends linearly in a predetermined direction, when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application region has a portion overlapping a non-joined portion where the leak-proof sheet and the non-skin side sheet are not joined. The absorbent article is characterized by this.

2. The absorbent article according to claim 1, wherein when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application region continuously has a portion overlapping the non-joined portion from one end to the other end in the predetermined direction. The absorbent article is characterized by this.

3. The absorbent article according to claim 1 or 2, wherein when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application region has a portion overlapping the absorbent core. The absorbent article is characterized by this.

4. The absorbent article according to claim 1 or 2, wherein when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application region has a portion overlapping a central region when the absorbent article is divided into three parts in the longitudinal direction. The absorbent article is characterized by this.

5. The absorbent article according to claim 1 or 2, wherein it has an elastic member that expands and contracts in the width direction, the fragrance application region extends in the longitudinal direction and a plurality of them are arranged in the width direction, The absorbent article is characterized in that the elastic member and the plurality of perfume application areas overlap in the width direction.

6. The absorbent article according to claim 1 or 2, wherein the perfume application area extends in the longitudinal direction or the width direction.

7. The absorbent article according to claim 1 or 2, comprising an absorbent body having the absorbent core and a waist portion, wherein the non-bonded portion having a portion overlapping with the perfume application area extends in the longitudinal direction and has an opening that opens at one end of the absorbent body in the longitudinal direction, and is continuous in the longitudinal direction from the perfume application area to the opening.

8. The absorbent article according to claim 7, having a cover sheet that covers one end of the absorbent body in the longitudinal direction from the skin side, wherein when the absorbent article in the unfolded state is viewed in the thickness direction, the opening of the non-bonded portion has a portion overlapping with a second non-bonded portion where the cover sheet is not bonded to the waist portion and the absorbent body.

9. The absorbent article according to claim 7, wherein in the waist portion, a plurality of waist elastic members that expand and contract in the width direction are arranged in the longitudinal direction, and the longitudinal interval between the opening of the non-bonded portion and the waist elastic member closest to the opening on the one side in the longitudinal direction is larger than the average interval between the waist elastic members adjacent to each other in the longitudinal direction in the waist portion on the one side in the longitudinal direction.

10. The absorbent article according to claim 1 or 2, having a printed portion visible from the non-skin side of the absorbent article, When the absorbent article in the unfolded state is viewed in the thickness direction, in the central region when the absorbent article is divided into three parts in the longitudinal direction, the fragrance application region does not overlap with the printing portion. The absorbent article is characterized by this.

11. The absorbent article according to claim 1 or 2, The fragrance application region and the joint portion where the leak-proof sheet and the non-skin-side sheet are joined extend in the longitudinal direction, The fragrance application region is located between a plurality of the joint portions arranged in the width direction, The interval in the width direction between the adjacent joint portions sandwiching the fragrance application region is wider than the interval in the width direction between the adjacent joint portions not sandwiching the fragrance application region. The absorbent article is characterized by this.

12. The absorbent article according to claim 1 or 2, It has an absorbent main body including the absorbent core and a body circumferential portion, The body circumferential portion has an expandable and contractible region that expands and contracts in the width direction and a non-expandable region, The fragrance application region extends in the longitudinal direction and a plurality are arranged in the width direction, When the absorbent article in the unfolded state is viewed in the thickness direction, each part of the plurality of fragrance application regions located in the body circumferential portion overlaps with the non-expandable region. The absorbent article is characterized by this.

13. The absorbent article according to claim 1 or 2, It has an elastic member that expands and contracts in the width direction, The non-joint portion having a portion overlapping with the fragrance application region is orthogonal to the elastic member. The absorbent article is characterized by this.

14. The absorbent article according to claim 1 or 2, The joint portion where the leak-proof sheet and the non-skin-side sheet are joined extends linearly in the predetermined direction, The maximum width of the fragrance application region in the direction orthogonal to the predetermined direction is larger than the maximum width of the joint portion. The absorbent article is characterized by this.

15. having a width direction, a length direction, and a thickness direction that are orthogonal to each other in the unfolded state, a liquid-absorbent absorbent core, a leak-proof sheet provided on the non-skin side of the absorbent core, a non-skin side sheet provided on the non-skin side of the leak-proof sheet, a method for manufacturing an absorbent article, comprising: applying a fragrance to the skin side surface of the non-skin side sheet to form a fragrance application region; applying an adhesive to the skin side surface of the non-skin side sheet such that, when the absorbent article in the unfolded state is viewed in the thickness direction, the fragrance application region has a portion overlapping a non-bonded portion where the leak-proof sheet and the non-skin side sheet are not bonded; A method for manufacturing an absorbent article, characterized by comprising the steps of:

16. A method for manufacturing an absorbent article according to claim 15, characterized in that after the step of applying the adhesive, the step of forming the fragrance application region is performed.

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