Shorts-type absorbent article

Abstract

Provided is a shorts-type absorbent article in which a highly fluid oily component is disposed closer to the skin side than a back sheet (liquid-impermeable sheet) and which can suppress functional degradation of another oily component. A shorts-type absorbent article (1) comprises an absorbent body (3) and an exterior body 5). The absorbent body includes: an absorbent core (27a); a skin-side sheet (21) disposed at the skin side of the absorbent core and having liquid permeability; a liquid-impermeable sheet (29) disposed at the non-skin side of the absorbent core; and a first oily component (41) disposed on the skin-side sheet or the absorbent core. The absorbent body or the exterior body includes a hydrophobic nonwoven fabric sheet (35) disposed at the non-skin side of the liquid-impermeable sheet. The shorts-type absorbent article has a second oily component (143) disposed in at least a region that does not overlap the first oily component in the thickness direction and that is located closer to the skin side than the skin-side sheet or closer to the non-skin side than the liquid-impermeable sheet in a plan view of the shorts-type absorbent article in an unfolded state.

Description

Shorts-type absorbent article

[0001] The present disclosure relates to shorts-type absorbent articles.

[0002] Absorbent articles containing oily components are known, including, for example, modifiers that modify bodily waste, skin care agents that protect the skin, inks for images drawn on absorbent articles, and adhesives that bond components of absorbent articles together.

[0003] An example of the modifier is a blood slipping agent contained in the absorbent article described in Patent Document 1. The absorbent article has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body between the liquid-permeable top sheet and the liquid-impermeable back sheet. The liquid-permeable top sheet has an uneven structure including convex portions and concave portions on the skin-contacting surface. The liquid-permeable top sheet has a blood slipping agent contained in the absorbent article, the blood slipping agent being contained in the liquid-permeable top sheet. The blood slipping agent is a blood-slipping agent contained in the absorbent article described in Patent Document 1. The blood slipping agent is a blood-slipping agent contained in the absorbent article ... ２ The blood slipping agent has a kinematic viscosity of 0.01 to 4.0 mass % and a weight-average molecular weight of less than 1,000.

[0004] An example of the ink is the graphic ink contained in the absorbent article described in Patent Document 2. The absorbent article includes a body-contacting layer, a garment-contacting layer, and an absorbent core having a core edge disposed between the body-contacting layer and the garment-contacting layer. The core edge defines a core region within the core edge and an outer region outside the core region. The body-contacting layer and the garment-contacting layer extend outward to the outer region and are joined together within the outer region. The garment-contacting layer has a graphic printed on its body-facing surface in at least a portion of the outer region. The body-contacting layer has a first light transmittance such that the graphic is printed on the body-facing surface of the garment-contacting layer and is visible through the body-contacting layer in the outer region.

[0005] The adhesive may be, for example, a hot melt adhesive.

[0006] International Publication No. 2013 / 129236 Japanese Patent Application Laid-Open No. 2005-523139

[0007] In Patent Document 2, the adhesive of the fastener for attaching the sanitary napkin to the wearer's underwear is disposed on the layer that contacts clothing, i.e., the non-skin side surface of the backsheet. Here, both the adhesive of the fastener and the ink of the graphic are oil-based. Therefore, there is a risk that the ink will dissolve into the adhesive if it comes into contact with the adhesive. Therefore, the graphic is disposed on the skin side surface of the backsheet, not on the non-skin side where the adhesive of the fastener is disposed.

[0008] However, if a highly fluid oily component, such as the blood slipping agent described in Patent Document 1, is applied to an absorbent article having such a configuration, the excrement absorbed in the absorbent body is likely to reach the skin-facing surface of the backsheet together with the blood slipping agent, which may cause the ink of the graphic arranged on the skin-facing surface of the backsheet to peel off due to the blood slipping agent.

[0009] Furthermore, if the backsheet of a shorts-type absorbent article or the like is moisture-permeable to prevent stuffiness, some of the oily components that reach the backsheet will easily pass through the backsheet and reach the non-skin side of the backsheet, which may reduce the adhesive strength of the adhesive disposed on the non-skin side of the backsheet.

[0010] Therefore, the object of the present invention is to provide a shorts-type absorbent article that can suppress the deterioration of the functionality of other oily components (e.g., ink, adhesive) caused by highly fluid oily components (e.g., modifiers, skin care agents) even when the oily components are placed on the skin-facing surface of the back sheet or on the skin-facing side of the back sheet.

[0011] The present disclosure relates to a shorts-type absorbent article comprising an absorbent main body and an outer body, wherein the shorts-type absorbent article has, in an unfolded state, longitudinal, width, and thickness directions that are perpendicular to one another, the absorbent main body comprising an absorbent core, a liquid-permeable skin-side sheet arranged on the skin side of the absorbent core, a liquid-impermeable sheet arranged on the non-skin side of the absorbent core, and a first oily component arranged on the skin-side sheet or the absorbent core, the absorbent main body or the outer body comprising a hydrophobic nonwoven fabric sheet arranged on the non-skin side of the liquid-impermeable sheet, and the shorts-type absorbent article has a second oily component arranged at least in a region that does not overlap with the first oily component in the thickness direction, the second oily component being closer to the skin than the skin-side sheet or the non-skin side than the liquid-impermeable sheet in a plan view in the unfolded state.

[0012] In the shorts-type absorbent article according to the present disclosure, even when a highly fluid oily component is placed on the skin-facing surface of the back sheet or on the skin-facing side of the back sheet, the oily component can suppress a decrease in the functionality of other oily components.

[0013] FIG. 1 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 2 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 3 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 4 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 5 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 6 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 7 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 8 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 9 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment. FIG. 10 is a diagram illustrating a shorts-type napkin 1 according to the first embodiment.

[0014] Specifically, the present disclosure relates to the following aspects: [Aspect 1] A shorts-type absorbent article comprising an absorbent main body and an exterior body, the shorts-type absorbent article having a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another in an unfolded state, the absorbent main body comprising an absorbent core, a liquid-permeable skin-side sheet disposed on the skin side of the absorbent core, a liquid-impermeable sheet disposed on the non-skin side of the absorbent core, and a first oily component disposed on the skin-side sheet or the absorbent core, the absorbent main body or the exterior body comprising a hydrophobic nonwoven fabric sheet disposed on the non-skin side of the liquid-impermeable sheet, the shorts-type absorbent article having a second oily component disposed at least in a region that does not overlap with the first oily component in the thickness direction, in a plan view in the unfolded state, the second oily component being disposed on at least a region closer to the skin than the skin-side sheet or closer to the skin than the liquid-impermeable sheet.

[0015] In this shorts-type absorbent article, the second oily component is disposed at a position where it does not overlap the first oily component in the thickness direction and is disposed at least in a region closer to the skin side than the skin-side sheet or closer to the skin side than the liquid-impermeable sheet. That is, the second oily component (e.g., ink, adhesive) is disposed in a location where the first oily component (e.g., modifier, skin care agent) is unlikely to come into contact with the first oily component even if it moves with absorbed excrement (e.g., menstrual blood, urine). This makes it difficult for the first oily component and the second oily component to mix with each other. This allows the absorbent article to be endowed with the functions of both the first oily component and the second oily component, while preventing the first oily component from deteriorating the function of the second oily component.

[0016] [Aspect 2] The shorts-type absorbent article according to aspect 1, wherein the kinetic viscosity of the first oily component is lower than the kinetic viscosity of the second oily component.

[0017] In the present shorts-type absorbent article, by relatively lowering the kinetic viscosity of the first oily component, the first oily component can be made more mobile, which can increase the ease of contact between the first oily component (such as a modifier) ​​and excrement, and improve the ease of transfer of the first oily component (such as a skin care agent) to the skin. In addition, by relatively increasing the kinetic viscosity of the second oily component, the second oily component (e.g., ink, adhesive) can be made less likely to migrate from the location where it is placed, thereby ensuring its function (in the case of ink, this can make it less likely to dissolve, and in the case of an adhesive, this can make it less likely to lose its adhesiveness).

[0018] [Aspect 3] The shorts-type absorbent article according to Aspect 1 or 2, wherein the liquid-impermeable sheet has moisture permeability and includes a graphic layer disposed on the non-skin-facing surface, and the second oil-based component is ink contained in the graphic layer.

[0019] In this shorts-type absorbent article, the ink, which is the second oily component, is disposed on the non-skin-side surface of the liquid-impermeable sheet in an area that does not overlap with the first oily component in the thickness direction. That is, the ink is disposed in a location where it is unlikely to come into contact with the first oily component even if the first oily component moves with the excrement. In this way, because the ink and the first oily component are positioned such that they are unlikely to come into contact with each other, even if the first oily component passes through the moisture-permeable liquid-impermeable sheet after the excrement has been absorbed, deterioration of the graphic layer due to the first oily component can be suppressed. This not only suppresses stuffiness due to the moisture permeability of the liquid-impermeable sheet, but also maintains the graphic layer's function of concealing excrement and making the shorts-type absorbent article look like underwear.

[0020] [Aspect 4] The shorts-type absorbent article according to aspect 3, wherein the graphic layer is also disposed in an area overlapping the first oily component in the thickness direction.

[0021] In this shorts-type absorbent article, the graphic layer is disposed not only in areas that overlap with the first oily component in the thickness direction, but also in areas where it does not overlap. Therefore, the areas where the graphic layer does not overlap with the first oily component in the thickness direction allow the graphic layer to be disposed over a wide area. This makes it easier to maintain the functions of the graphic layer (such as the function of concealing bodily excrement and the function of making the shorts-type napkin 1 look like underwear) even if there are areas that are somewhat affected by the first oily component, and more reliably prevents the first oily component from deteriorating the functions of the graphic layer. Furthermore, the areas where the graphic layer overlaps with the first oily component in the thickness direction and the areas where it does not overlap expand the area of ​​the graphic layer, increasing the flexibility of the graphic layer and improving design.

[0022] [Aspect 5] The shorts-type absorbent article according to Aspect 3 or 4, wherein the hydrophobic nonwoven fabric sheet is bonded to the liquid-impermeable sheet with an adhesive so as to cover the non-skin side of the graphic layer.

[0023] In this shorts-type absorbent article, the hydrophobic nonwoven fabric sheet is bonded to the liquid-impermeable sheet so as to cover the non-skin side of the graphic layer, which reduces the risk of the graphic layer rubbing against the skin or clothing and falling off, thereby more reliably maintaining the functionality of the graphic layer.

[0024] [Aspect 6] The shorts-type absorbent article according to Aspect 5, wherein the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is formed intermittently in the longitudinal direction and the width direction.

[0025] In this shorts-type absorbent article, the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is applied intermittently in the longitudinal and width directions, which minimizes the area of ​​the adhesive that comes into contact with the graphic layer, thereby reducing the amount of ink that mixes with the adhesive and more reliably preventing deterioration of the graphic layer.

[0026] [Aspect 7] The shorts-type absorbent article according to aspect 5 or 6, wherein the kinetic viscosity of the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is higher than the kinetic viscosity of the ink.

[0027] In this shorts-type absorbent article, the dynamic viscosity of the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is relatively high, which makes it difficult for the adhesive to migrate and the adhesive and ink to mix with each other, thereby more reliably preventing the functionality of the graphic layer from deteriorating.

[0028] [Aspect 8] The shorts-type absorbent article according to any one of Aspects 5 to 7, wherein the hydrophobic nonwoven fabric sheet includes a low-density layer located on the skin-side surface facing the liquid-impermeable sheet, and a high-density layer located on the non-skin-side surface of the low-density layer.

[0029] In this shorts-type absorbent article, the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet easily penetrates the low-density layer of the hydrophobic nonwoven fabric sheet. Therefore, the adhesive is less likely to migrate to the ink in the graphic layer disposed on the non-skin-side surface of the liquid-impermeable sheet and to come into contact with the ink. This prevents the ink from dissolving or peeling off due to the adhesive. This more reliably maintains the functionality of the graphic layer. Furthermore, because the high-density layer is present on the non-skin-side surface of the hydrophobic nonwoven fabric sheet, even if the first oily component penetrates through the breathable, liquid-impermeable sheet, reaches the graphic layer, and peels off the ink, the ink is prevented from leaking outward (to the non-skin side) beyond the high-density layer.

[0030] [Aspect 9] The shorts-type absorbent article according to Aspect 3, wherein the absorbent main body includes main body elastic members extending along the longitudinal direction, and the first oily component, the graphic layer, and the main body elastic members overlap in the thickness direction at a central portion of the shorts-type absorbent article in the longitudinal direction.

[0031] In this shorts-type absorbent article, the main body elastic members contract in response to body movement, fitting the absorbent main body into the buttocks groove, making it easier to separate the region in the longitudinal center of the absorbent article where the graphic layer is located, i.e., the crotch region that is prone to rubbing against clothing, from clothing. This more reliably prevents the functionality of the graphic layer from deteriorating and improves the absorbency of the absorbent main body.

[0032] [Aspect 10] The shorts-type absorbent article according to Aspect 3, wherein the exterior body is disposed in a rear region in the longitudinal direction and includes rear-side elastic members extending along the width direction, and the first oily component, the graphic layer, and the rear-side elastic members overlap in the thickness direction in the rear region in the longitudinal direction of the shorts-type absorbent article.

[0033] In this shorts-type absorbent article, the back elastic members contract in response to body movement, fitting the absorbent main body into the buttocks groove, making it easier to separate the region in the longitudinal center of the absorbent article where the graphic layer is located, i.e., the crotch region that is prone to rubbing against clothing, from clothing. This more reliably prevents the functionality of the graphic layer from deteriorating and improves the absorbency of the absorbent main body.

[0034] [Aspect 11] The shorts-type absorbent article according to Aspect 3, wherein the absorbent core has a pair of thin-walled portions extending along the longitudinal direction and arranged at an interval in the width direction, and the first oily component, the graphic layer, and the pair of thin-walled portions overlap in the thickness direction at a central portion in the width direction of the shorts-type absorbent article.

[0035] In this shorts-type absorbent article, a pair of thin sections (e.g., low basis weight section, slit section, compressed section) deforms the central section in the width direction of the absorbent main body into a convex shape on the upper side in the thickness direction, making it easier to draw in body fluids and to separate that section from clothing. This more reliably prevents the functionality of the graphic layer from deteriorating and improves the absorbency of the absorbent main body.

[0036] [Aspect 12] The shorts-type absorbent article according to Aspect 1 or 2, wherein the second oily component is an adhesive that bonds the constituent members of the shorts-type absorbent article to each other.

[0037] In this shorts-type absorbent article, the adhesive, which is the second oily component, is disposed in at least a region that does not overlap with the first oily component in the thickness direction. That is, the adhesive is disposed in a location that is unlikely to come into contact with the first oily component even if the first oily component moves with the excrement. In this way, the adhesive and the first oily component are positioned in a way that makes it unlikely for them to come into contact with each other, so that the bond strength of the adhesive can be prevented from being reduced by the first oily component even after the excrement has been absorbed. This prevents stuffiness due to the moisture permeability of the liquid-impermeable sheet, and also maintains the function of the adhesive. Furthermore, even if the bond strength of other adhesives in the region that overlaps with the first oily component in the thickness direction is reduced by the first oily component, the bond can be maintained by the adhesive in the region that does not overlap with the first oily component in the thickness direction.

[0038] [Aspect 13] The shorts-type absorbent article according to Aspect 12, wherein the liquid-impermeable sheet is moisture-permeable, and the adhesive is an exterior body adhesive that joins the absorbent main body and the exterior body.

[0039] In this shorts-type absorbent article, the outer body adhesive is disposed in a location that is unlikely to come into contact with the first oily component, such as at least a region that does not overlap with the first oily component in the thickness direction. Therefore, even if the first oily component migrates after absorbing excrement and passes through the moisture-permeable, liquid-impermeable sheet, it is unlikely to come into contact with the outer body adhesive. This prevents the first oily component from reducing the bonding strength of the outer body adhesive, thereby maintaining the functionality of the outer body adhesive.

[0040] [Aspect 14] The shorts-type absorbent article according to Aspect 13, wherein the exterior body adhesive is formed intermittently in the longitudinal direction and the width direction.

[0041] In this shorts-type absorbent article, the outer body adhesive is formed intermittently in the longitudinal and width directions. Therefore, even if the first oily component passes through the moisture-permeable, liquid-impermeable sheet and reaches the outer body adhesive, reducing the bond strength of part of the outer body adhesive, the decrease in bond strength in other parts of the outer body adhesive formed intermittently can be suppressed. This makes it possible to maintain both moisture permeability and adhesive strength.

[0042] [Aspect 15] The shorts-type absorbent article according to Aspect 13 or 14, wherein the widthwise dimension of the region where the outer body adhesive is formed is larger than the widthwise dimension of the region where the first oily component is formed.

[0043] In this shorts-type absorbent article, the width of the region where the exterior body adhesive is formed is wider than the width of the region where the first oily component is formed. Therefore, even if the first oily component passes through the moisture-permeable, liquid-impermeable sheet and reaches the exterior body adhesive, reducing the bond strength of part of the exterior body adhesive, the decrease in bond strength in the wide region of the exterior body adhesive that does not overlap with the first oily component in the thickness direction can be suppressed. This makes it possible to maintain both moisture permeability and adhesive strength.

[0044] [Aspect 16] The shorts-type absorbent article according to any one of Aspects 13 to 15, wherein the exterior body adhesive is also disposed in an area overlapping with the first oily component in the thickness direction.

[0045] In this shorts-type absorbent article, the outer body adhesive has portions that overlap with the first oily component in the thickness direction and portions that do not. This more reliably prevents the first oily component from reducing the bonding strength in the portions where the outer body adhesive does not overlap with the first oily component in the thickness direction. Furthermore, since the outer body adhesive has not only portions that do not overlap with the first oily component in the thickness direction but also portions that do, the area where the outer body adhesive is disposed is wider, which more reliably prevents the absorbent main body from coming off the outer body due to friction.

[0046] [Aspect 17] The shorts-type absorbent article according to Aspect 13, wherein the exterior body comprises the hydrophobic nonwoven fabric sheet, and the hydrophobic nonwoven fabric sheet includes a low-density layer located on the skin-side surface facing the liquid-impermeable sheet, and a high-density layer located on the non-skin-side surface of the low-density layer.

[0047] In this shorts-type absorbent article, the exterior body adhesive easily penetrates into the low-density layer of the hydrophobic nonwoven fabric sheet. Therefore, even if the first oily component penetrates through the moisture-permeable, liquid-impermeable sheet, the exterior body adhesive is unlikely to peel off from the hydrophobic nonwoven fabric sheet. Furthermore, because the high-density layer is present on the non-skin side of the hydrophobic nonwoven fabric sheet, even if the first oily component penetrates through the moisture-permeable, liquid-impermeable sheet and the exterior body adhesive peels off, the exterior body adhesive is prevented from leaking outward (to the non-skin side) beyond the high-density layer.

[0048] [Aspect 18] The shorts-type absorbent article according to Aspect 12, wherein the absorbent main body further comprises a pair of side sheets disposed on both sides of the skin side sheet in the width direction and extending in the longitudinal direction, and the adhesive is a side adhesive used to join the pair of side sheets.

[0049] In this shorts-type absorbent article, the side adhesive is disposed in a location that is unlikely to come into contact with the first oily component, such as at least an area that does not overlap with the first oily component in the thickness direction. Therefore, even if the first oily component (e.g., a modifier or skin care agent) migrates and reaches the side adhesive, it is unlikely to come into contact with the side adhesive. This prevents the first oily component from reducing the bonding strength of the side adhesive. This allows the functionality of the side adhesive to be maintained. Furthermore, problems are unlikely to occur even if the bonding strength of other side adhesives in the area that overlaps with the first oily component in the thickness direction is reduced by the first oily component.

[0050] [Aspect 19] The shorts-type absorbent article according to Aspect 18, wherein the first oily component is arranged so as to be exposed on the skin-side surface of the skin-side sheet, and the side adhesive is arranged at a position away from the inner edge of the side sheet in the width direction so as not to be exposed on the skin-side surface of the skin-side sheet.

[0051] In this shorts-type absorbent article, the first oily component is exposed on the skin-side surface of the skin-side sheet, thereby enhancing its functionality, and the side adhesive is positioned away from the inner edge of the side sheet in the width direction so as not to be exposed on the skin-side surface of the skin-side sheet, thereby increasing adhesive strength while suppressing damage to the skin surface.

[0052] [Aspect 20] The shorts-type absorbent article according to Aspect 18 or 19, wherein each of the pair of side sheets includes a leak-proof wall formed on the inner side in the width direction and extending in the longitudinal direction, the leak-proof wall includes a pair of end joining portions at both ends in the longitudinal direction joined to the absorbent main body with an end adhesive as the side adhesive, and the first oily component is located closer to the center in the longitudinal direction and the width direction than the end adhesive.

[0053] In this shorts-type absorbent article, the first oily component is positioned closer to the center in the longitudinal and width directions than the edge adhesive of each of the pair of leakage barrier walls. Therefore, even if the first oily component spreads, the edge adhesive is located away from the first oily component, which prevents a decrease in the bonding strength of the edge adhesive and maintains the uprightness of the leakage barrier walls, thereby continuing to prevent side leakage.

[0054] [Aspect 21] The shorts-type absorbent article according to Aspect 12, wherein the absorbent main body has a pair of leak barrier walls arranged at both ends in the width direction and extending in the longitudinal direction, and the adhesive is a leak barrier wall adhesive that adheres leak barrier wall elastic members to each of the pair of leak barrier walls.

[0055] In this shorts-type absorbent article, the leak-proof wall adhesive is positioned widthwise outboard of the first oily component, i.e., in a location that is less likely to come into contact with the first oily component. Therefore, even if the first oily component (e.g., modifier, skin care agent) migrates, it is less likely to come into contact with the leak-proof wall adhesive. This prevents the first oily component from reducing the bonding strength of the leak-proof wall adhesive. This allows the functionality of the leak-proof wall adhesive to be maintained. Furthermore, even if the bonding strength of other exterior body adhesives in the region that overlaps the first oily component in the thickness direction is reduced by the first oily component, problems are less likely to occur.

[0056] In this specification, a shorts-type absorbent article refers to a shorts-type absorbent article, but it may also be a pants-type or tape-type absorbent article. Examples of absorbent articles include disposable diapers, urine absorption pads, incontinence pads, sanitary napkins, and panty liners. Here, a shorts-type absorbent article will be described using a shorts-type (sanitary) napkin as an example.

[0057] The shorts-type napkin according to the present disclosure will be described in detail below. [First Embodiment] Figures 1 to 10 are diagrams illustrating a shorts-type napkin 1 according to one embodiment of the present disclosure (hereinafter referred to as the "first embodiment"). Specifically, Figure 1 is a perspective view of the shorts-type napkin 1. Figures 2 and 3 are views of the inner and outer sides, respectively, of the shorts-type napkin 1 in an unfolded state. Figures 4 and 5 are views of the inner and outer sides, respectively, of the absorbent main body 3 in an unfolded state. Figure 6 is an end view of the shorts-type napkin 1 taken along the line VI-VI in Figure 2. Note that in Figure 6, the compressed portions 37 are omitted, and not all of the bonded portions are shown. Figure 7 is a partially enlarged end view of the shorts-type napkin 1 taken along the line VI-VI in Figure 2. Figure 8 is a partially enlarged end view of the shorts-type napkin 1 taken along the line VIII-VIII in Figure 2. Fig. 9 is a view of a modified example of the inner surface side of the absorbent main body 3 in the unfolded state. Fig. 10 is a view of the outer surface side of the absorbent main body 3 in the unfolded state, excluding the hydrophobic nonwoven fabric sheet 35.

[0058] The shorts-type napkin 1 has a waist opening 101 and a pair of leg openings 103 (one leg opening 103a and the other leg opening 103b), and a pair of fastening parts 105 (one fastening part 105a and the other fastening part 105b) extending from the waist opening 101 toward the pair of leg openings 103. The pair of fastening parts 105 fasten the ventral region 7 and the dorsal region 9, which will be described later.

[0059] The shorts-type napkin 1 comprises an absorbent body 3 that absorbs menstrual blood and a shorts-shaped exterior body 5. The absorbent body 3 has a rectangular shape with a longitudinal direction L and a width direction W. The absorbent body 3 and the exterior body 5 are fixed to the exterior body 5 by an inter-body joint 131 made of hot melt adhesive (exterior body adhesive).

[0060] In its unfolded state (a state in which the pair of locking portions 105 (one locking portion 105a and the other locking portion 105b) are released as needed, and the material (e.g., nonwoven fabric) constituting the shorts-type napkin 1 is stretched to a degree that does not cause breakage, thereby spreading the shorts-type napkin 1 out on a plane), the shorts-type napkin 1 has a longitudinal direction L and a width direction W derived from the absorbent main body 3, and a thickness direction T that is perpendicular to the longitudinal direction L and the width direction W. Note that the longitudinal direction L and the width direction W refer to the long and short directions of the absorbent main body 3, respectively, and do not refer to the long and short directions of the shorts-type napkin 1 in its unfolded state.

[0061] In its unfolded state, the shorts-type napkin 1 is divided by a longitudinal centerline LC extending in the width direction W at the center of the longitudinal direction L of the shorts-type napkin 1 into a ventral region 7 located closer to a front end 11 than the longitudinal centerline LC and a dorsal region 9 located closer to a rear end 13 than the longitudinal centerline LC. The front end 11 and the rear end 13 refer to the edges on the ventral region 7 side and the dorsal region 9 side, respectively, which define the waist opening 101.

[0062] The exterior body 5 includes a first exterior sheet 111 extending from the ventral region 7 to the dorsal region 9 and arranged on the clothing side, a ventral-side second exterior sheet 113a extending into the ventral region 7 and arranged on the skin side, and a dorsal-side second exterior sheet 113b extending into the dorsal region 9 and arranged on the skin side. Each of the first exterior sheet 111, the ventral-side second exterior sheet 113a, and the dorsal-side second exterior sheet 113b is made of a hydrophobic nonwoven fabric sheet.

[0063] The ventral-side second outer sheet 113a is disposed on the skin side of the first outer sheet 111 in the thickness direction T, and is disposed in the longitudinal direction L from the front end 11 that defines the waist-opening 101 to just before the longitudinal center line LC. In addition, the ventral-side second outer sheet 113a is disposed in the width direction W from one locking portion 105a to the other locking portion 105b.

[0064] The back-side second outer sheet 113b is disposed on the skin side of the first outer sheet 111 in the thickness direction T, and is disposed in the longitudinal direction L from the rear end 13 that defines the waist-opening 101 to just before the longitudinal center line LC. In addition, the back-side second outer sheet 113b is disposed in the width direction W from one locking portion 105a to the other locking portion 105b.

[0065] The first outer sheet 111 is folded inward at the front end 11 and the rear end 13, respectively, to cover the ventral-side second outer sheet 113a and the dorsal-side second outer sheet 113b. In the unfolded state, the outer body 5 is partitioned into a single-sheet region 51 consisting of a single sheet (i.e., the first outer sheet 111) and a multiple-sheet region 53 consisting of multiple sheets (i.e., the first outer sheet 111 and the ventral-side second outer sheet 113a or the dorsal-side second outer sheet 113b). The single-sheet region 51 is arranged from the ventral region 7 to the dorsal region 9, straddling the longitudinal centerline LC. The multiple-sheet region 53 is arranged in each of the ventral region 7 and the dorsal region 9.

[0066] In the unfolded state, in the multiple-sheet region 53 of the abdominal region 7, a plurality of abdominal-side elastic members 115 are arranged between the first outer sheet 111 and the abdominal-side second outer sheet 113a, extending from one engaging portion 105a to the other engaging portion 105b and spaced apart in the longitudinal direction L. The plurality of abdominal-side elastic members 115 are joined to the first outer sheet 111 and the abdominal-side second outer sheet 113a by an inter-outer-sheet adhesive layer (not shown) made of a hot melt adhesive in a state in which they are stretched relative to the first outer sheet 111 and the abdominal-side second outer sheet 113a.

[0067] In the unfolded state, in the multiple-sheet region 53 of the back region 9, a plurality of back-side elastic members 117 are arranged between the first outer sheet 111 and the back-side second outer sheet 113b, extending from one locking portion 105a to the other locking portion 105b or from one leg opening 103a to the other leg opening 103b, and spaced apart in the longitudinal direction L. In addition, in the unfolded state, the multiple-sheet region 53 of the back region 9 is provided with three rear leg elastic members 119 arranged between the first outer sheet 111 and the back-side second outer sheet 113b, extending from one locking portion 105a through one leg opening 103a and the other leg opening 103b to the other locking portion 105b, overlapping with the absorbent main body 3 and curved to protrude toward the longitudinal center line LC.

[0068] The multiple back elastic members 117 and the three rear leg elastic members 119 are joined to the first outer sheet 111 and the ventral second outer sheet 113a by inner outer sheet joints 133 made of hot melt adhesive while being stretched relative to the first outer sheet 111 and the back second outer sheet 113b.

[0069] The absorbent body 3 comprises, in the thickness direction T, a top sheet 21 having a skin-contacting surface 23a and a non-skin-contacting surface 23b, a second sheet 25, an absorbent core 27a, a liquid-impermeable sheet 29, a graphic layer 143, an elastic member 31, and a hydrophobic nonwoven fabric sheet 35, in that order. The absorbent core 27a is arranged together with a core wrap 27b that covers the absorbent core 27a as an absorber 27. The absorbent core 27a is hourglass-shaped and has a pair of constricted portions 27c that are constricted in the width direction W.

[0070] The skin-side portions of the top sheet 21, the second sheet 25, and the core wrap 27b are liquid-permeable and are closer to the skin than the absorbent core 27a, so they can be called skin-side sheets. The hydrophobic nonwoven fabric sheet 35 is included in the absorbent body 3, but it may also be included in the exterior body 5, or a hydrophobic nonwoven fabric sheet other than the hydrophobic nonwoven fabric sheet 35 may be included in the exterior body 5.

[0071] The absorbent main body 3 includes at least a pair of thin-walled portions extending along the longitudinal direction L and spaced apart in the width direction W. The thin-walled portions are waveguides for excrement (e.g., menstrual blood, urine), and examples thereof include compressed portions, low basis weight portions, and slit portions. In this embodiment, the absorbent main body 3 includes a pair of compressed portions 37 that compress the top sheet 21, the second sheet 25, and the absorber 27 (the absorbent core 27a and the core wrap 27b). In this embodiment, the compressed portions 37 have an overall rabbit design. The core wrap 27b, located between the absorbent core 27a and the liquid-impermeable sheet 29, is joined to the absorbent core 27a by an adhesive layer (not shown) made of hot-melt adhesive. Furthermore, the core wrap 27b, located between the absorbent core 27a and the liquid-impermeable sheet 29, is joined to the liquid-impermeable sheet 29 by a core wrap joining portion 135 made of hot-melt adhesive.

[0072] The absorbent core 27a has a peaked portion 39 extending in the longitudinal direction L at the center in the width direction W. The peaked portion 39 is taller and has a larger basis weight than the remaining portions of the absorbent core 27a. This makes it easier for the peaked portion 39 of the absorbent core 27a to abut against the wearer's excretory opening, intergluteal cleft, etc. The core wrap 27b is folded inward in three along two fold lines extending parallel to the longitudinal direction L to cover the absorbent core 27a. At the skin side of the absorbent core 27a and at the center in the width direction W, the core wrap 27b overlaps two layers in the thickness direction T and has a multi-layer overlap region 55 extending in the longitudinal direction L.

[0073] The top sheet 21 is arranged to cover the second sheet 25 and absorber 27 (absorbent core 27a and core wrap 27b), and is joined to the liquid-impermeable sheet 29 with a hot melt adhesive. The liquid-impermeable sheet 29 is made of a moisture-permeable film with apertures. The liquid-impermeable sheet 29 stands up together with the leakage prevention walls 43 described below, protecting the sides of the liquid-impermeable sheet 29. The hydrophobic nonwoven fabric sheet 35 is made of a hydrophobic nonwoven fabric.

[0074] As shown in Figure 10, the graphic layer 143 is disposed on the non-skin-side surface of the liquid-impermeable sheet 29. For example, in a plan view in the unfolded state, pictures, patterns, letters, etc., are disposed as the graphic layer 143 in an area overlapping substantially the entire area of ​​the absorbent body 27 in the longitudinal direction L and width direction W. The graphic layer 143 is, for example, a picture, pattern, or letters drawn with ink, and is formed by a conventional printing method such as gravure printing, flexographic printing, offset printing, or inkjet printing. Figure 10 omits the compressed section 37, the elastic member arrangement region 33, and the oil-based component arrangement region 41, which will be described later. A hydrophobic nonwoven fabric sheet 35 is joined to the liquid-impermeable sheet 29 by a film-to-nonwoven fabric joint 137 made of a hot melt adhesive, so as to cover the non-skin side of the graphic layer 143.

[0075] The hydrophobic nonwoven fabric sheet 35 is disposed on the non-skin side of the liquid-impermeable sheet 29 and the graphic layer 143. This prevents the blood, etc. from adhering to other articles even if excrement, such as menstrual blood or a component of menstrual blood, or urine (hereinafter simply referred to as "menstrual blood, etc.") passes through the liquid-impermeable sheet 29.

[0076] The elastic member 31 (main elastic member) is composed of five thread-like elastic members, and the five thread-like elastic members define an elastic member arrangement region 33. The five thread-like elastic members are arranged along the longitudinal direction L, extending from the multiple-sheet region 53 in the ventral region 7, through the single-sheet region 51 in the ventral region 7 and the single-sheet region 51 in the dorsal region 9, and to the multiple-sheet region 53 in the dorsal region 9. The five thread-like elastic members constituting the elastic member 31 are arranged at regular intervals in the width direction W. The elastic member 31 is joined to the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 by the film-nonwoven fabric joints 137, with the five thread-like elastic members stretched relative to the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35. The elastic member 31 is a member that facilitates contact of the absorbent main body 3, and therefore the absorbent core 27a, with the wearer's excretory opening.

[0077] In this embodiment, the elastic member arrangement region 33 is arranged in an inner region of the absorbent body 27 when viewed in a plane in the unfolded state, and has a size of, for example, approximately 4 / 5 of the length in the longitudinal direction L and approximately 2 / 3 of the length in the width direction W.

[0078] 6 shows that the elastic member 31 is disposed on the liquid-impermeable sheet 29 side and the film-to-nonwoven fabric joint 137 is disposed on the hydrophobic nonwoven fabric sheet 35 side, but in reality, the film-to-nonwoven fabric joint 137 bonds the elastic member 31 from both the liquid-impermeable sheet 29 side and the hydrophobic nonwoven fabric sheet 35 side. However, bonding from either side is acceptable.

[0079] The absorbent core 27a is partitioned into a widthwise central region 63 located in the center of the width direction W of the absorbent core 27a, and a pair of widthwise side regions 65 located on both sides of the widthwise central region 63 in the width direction W. The five thread-like elastic members that make up the elastic member 31 are located in the widthwise central region 63. In addition, an oily component-locating region 41, which will be described later, is also located in the widthwise central region 63.

[0080] At each end of the width direction W of the hydrophobic nonwoven fabric sheet 35, the sheet is folded twice, once inward and once outward, along two fold lines extending parallel to the longitudinal direction L to form leakage barrier walls 43. As a result, a pair of leakage barrier walls 43 is formed at each end of the width direction W of the hydrophobic nonwoven fabric sheet 35. In this case, the sheets forming the pair of leakage barrier walls 43 at each end of the width direction W of the hydrophobic nonwoven fabric sheet 35 are disposed on both sides of the width direction W of the top sheet 21 and the second sheet 25 and extend in the longitudinal direction L, and can therefore be considered a pair of side sheets. Each of the pair of leakage barrier walls 43 has two leakage barrier wall elastic members 45 that, in the unfolded state, extend in the longitudinal direction L from the multiple-sheet region 53 in the ventral region 7, through the single-sheet region 51 in the ventral region 7 and the dorsal region 9, to the multiple-sheet region 53 in the dorsal region 9. Each of the two leakage barrier elastic members 45 is joined to the leakage barrier 43 (hydrophobic nonwoven fabric sheet 35) by a leakage barrier joint 141 made of a hot melt adhesive (leakage barrier adhesive) while being stretched relative to the leakage barrier wall 43 (hydrophobic nonwoven fabric sheet 35). In each of the pair of leakage barrier walls 43, the two leakage barrier elastic members 45 are joined to the leakage barrier wall 43 (hydrophobic nonwoven fabric sheet 35), and the region that exhibits stretchability is referred to as an elastic region 47. The pair of leakage barrier walls 43 are made of the hydrophobic nonwoven fabric that forms the hydrophobic nonwoven fabric sheet 35, are hydrophobic, and stand up from the absorbent main body 3 when worn, thereby suppressing leakage of menstrual blood.

[0081] Each of the pair of leakage preventing walls 43 has a pair of end joints 139 made of hot melt adhesive (end adhesive) at both ends in the longitudinal direction L. Each of the pair of leakage preventing walls 43 is joined to the top sheet 21 of the absorbent main body 3 by the pair of end joints 139. The hot melt adhesive used in the leakage preventing walls 43 (e.g., leakage preventing wall adhesive, end adhesive) is the hot melt adhesive used in the side sheets that form the leakage preventing walls 43, and therefore can also be called a side adhesive.

[0082] The absorbent body 3 includes an oily component-disposed region 41 in which a first oily component is disposed, which is disposed on the non-skin-contacting surface 23b of the top sheet 21. Examples of the first oily component include modifiers such as the blood slipping agent described in Patent Document 1, and skin care agents conventionally used in absorbent articles. Note that the first oily component does not include hydrophilizing agents that impart hydrophilicity to synthetic fibers used in liquid-permeable sheets such as the top sheet 21 and the second sheet 25.

[0083] In this embodiment, the first oily component is the blood slipping agent described in Patent Document 1. The oily component arrangement region 41 is disposed in a region more inward than the elastic member arrangement region 33, approximately at the center in the longitudinal direction L and the center in the width direction W, in a plan view in the unfolded state ( FIG. 5 ). Specifically, the oily component arrangement region 41 is disposed in a region more inward than the elastic member arrangement region 33 in a plan view in the unfolded state, and has a length that is, for example, about 4 / 5 of the length in the longitudinal direction L and about 1 / 2 of the length in the width direction W. However, the oily component arrangement region 41 is not limited to this example, and may be disposed, for example, wider in the width direction W than the elastic member arrangement region 33 of the absorbent body 27 ( FIG. 9 : modified example) and / or wider in the longitudinal direction L (not shown).

[0084] In a plan view in an unfolded state, the shorts-type napkin 1 has a second oily component that is arranged in at least a region that does not overlap with the oily component-distributing region 41 (first oily component) in the thickness direction T, and that is closer to the skin than the top sheet 21 or closer to the skin than the liquid-impermeable sheet 29. Examples of the second oily component include ink used in the graphic layer 143 and hot-melt adhesive that bonds the components of the shorts-type napkin 1 together. The second oily component may be arranged not only in the region that does not overlap with the oily component-distributing region 41 in the thickness direction T, but also in the region that does overlap.

[0085] In this embodiment, the second oily component is at least one of the ink of the graphic layer 143 arranged closer to the skin than the liquid-impermeable sheet 29, the hot melt adhesive (exterior body adhesive) of the inter-main body joint 131, the hot melt adhesive of the joint 133 within the exterior sheet, and the hot melt adhesive of the joint 137 between the film nonwoven fabrics, the hot melt adhesive (end adhesive) of a pair of end joints 139 arranged closer to the skin than the top sheet 21, and the hot melt adhesive (leakage prevention wall adhesive) of the leak prevention wall joint 141.

[0086] However, the oily component-disposing region 41 may be disposed in another skin-side sheet (the second sheet 25, the skin-side core wrap 27b) or the absorbent core 27a. In this case, the second oily component is disposed in a region closer to the skin than the other skin-side sheet or absorbent core 27a having the oily component-disposing region 41 or closer to the skin than the liquid-impermeable sheet 29.

[0087] Thus, in the shorts-type napkin 1, the second oily component (e.g., ink, adhesive) is disposed at a position where it does not overlap the first oily component (e.g., modifier, skin care agent) in the thickness direction, and at least in a region closer to the skin than a skin-side sheet such as the top sheet 21 or closer to the skin than the liquid-impermeable sheet 29. That is, the second oily component is disposed in a location where it is unlikely to come into contact with the first oily component, even if the first oily component diffuses and moves toward the non-skin side or in the longitudinal direction L or width direction W together with absorbed excrement (e.g., menstrual blood, urine). This makes it difficult for the first oily component and the second oily component to mix with each other. This allows the shorts-type napkin 1 to be endowed with the functions of each of the first oily component and the second oily component, while also preventing the second oily component from deteriorating in function due to dissolving in the first oily component or flowing out together with the first oily component.

[0088] The second oil component may be, for example, the ink of the graphic layer 143. In this case, the ink is arranged in the form of a picture, pattern, lettering, or the like on the non-skin-side surface of the liquid-impermeable sheet 29, outside the oil component arrangement region 41 as the first oil component, in a plan view in the unfolded state. The ink as the second oil component is arranged on the non-skin-side surface of the liquid-impermeable sheet 29, in an area of ​​the oil component arrangement region 41 that does not overlap with the first oil component in the thickness direction T. In other words, the ink is arranged in a location where it is unlikely to come into contact with the first oil component, even if the first oil component moves along with excrement such as menstrual blood. In this way, because the ink and the first oil component are positioned such that they are unlikely to come into contact with each other, degradation of the graphic layer 143 due to the first oil component can be suppressed, even if the first oil component passes through the breathable liquid-impermeable sheet after excrement has been absorbed. This allows the liquid-impermeable sheet 29 to have moisture permeability, thereby suppressing stuffiness, while also maintaining the graphic layer 143's function of concealing bodily waste and making the shorts-type napkin 1 look like underwear.

[0089] The graphic layer 143 (ink thereof) may also be disposed in an area that overlaps in the thickness direction T with the oil-based component-disposed area 41 as the first oil-based component. In this case, the area where the graphic layer 143 does not overlap with the first oil-based component in the thickness direction T allows the graphic layer 143 to be disposed over a wide area. This makes it easier to maintain the functions of the graphic layer 143 (such as the function of concealing excrement and the function of making the shorts-type napkin 1 look like underwear) even if there are areas that are somewhat affected by the first oil-based component, and more reliably prevents the first oil-based component from deteriorating the function of the graphic layer 143. Furthermore, the area of ​​the graphic layer 143 is expanded by both the area where the graphic layer 143 overlaps with the first oil-based component in the thickness direction T and the area where it does not overlap, thereby increasing the flexibility of the graphic layer 143 and improving its design.

[0090] The hydrophobic nonwoven fabric sheet 35 may be bonded to the liquid-impermeable sheet 29 with a hot melt adhesive at the film-to-nonwoven fabric joint 137 so as to cover the non-skin side of the graphic layer 143. In this case, the risk of the graphic layer 143 rubbing against the skin or clothing and falling off onto the skin or clothing can be reduced, and the functionality of the graphic layer 143 can be more reliably maintained.

[0091] 7 and 8 , the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 are joined to each other by a film-nonwoven fabric joint 137. The film-nonwoven fabric joint 137 is formed of a plurality of hot-melt adhesives 137a that extend spirally in the longitudinal direction L and are spaced at regular intervals in the width direction W, at least within the oily component distribution region 41 in a plan view in the unfolded state. In this embodiment, the film-nonwoven fabric joint 137 is formed of a plurality of hot-melt adhesives 137a that extend spirally in the longitudinal direction L and are spaced at regular intervals in the width direction W over the entire surfaces of the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35. Therefore, when the film-nonwoven fabric joint 137 is cut along any straight line parallel to the longitudinal direction L, the hot-melt adhesives 137a are intermittently arranged in the longitudinal direction L. When the film-nonwoven fabric joint 137 is cut along any straight line parallel to the width direction W, the hot melt adhesive 137a is disposed intermittently in the width direction W.

[0092] In this way, the shorts-type napkin 1 may have the hot melt adhesive 137a that bonds the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 formed intermittently in the longitudinal direction L and the width direction W. In this case, it is possible to minimize the area of ​​the hot melt adhesive 137a that comes into contact with the graphic layer 143. This reduces the amount of ink in the graphic layer 143 that mixes with the hot melt adhesive 137a, and more reliably prevents deterioration of the graphic layer 143.

[0093] 7 and 8, in the portion where the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 are not joined, gaps 151 are likely to be formed between the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35. As a result, menstrual blood, etc. 155 that has permeated the fine openings 153 of the liquid-impermeable sheet 29 is less likely to reach the hydrophobic nonwoven fabric sheet 35 and is less likely to reach outside the hydrophobic nonwoven fabric sheet 35, which in turn makes it possible to prevent menstrual blood, etc. from adhering to other articles.

[0094] As shown in FIG. 7 or 8 , the hydrophobic nonwoven fabric sheet 35 may be made of a hydrophobic SMS nonwoven fabric. In this case, the hydrophobic nonwoven fabric sheet 35 includes, in order from the liquid-impermeable sheet 29 side, a first low-density layer 161, a high-density layer 163, and a second low-density layer 165. The high-density layer 163 has a density relatively higher than the first low-density layer 161 and the second low-density layer 165. Therefore, the hot-melt adhesive 137a in the film-to-nonwoven fabric joint 137 that bonds the hydrophobic nonwoven fabric sheet 35 and the liquid-impermeable sheet 29 easily penetrates into the first low-density layer 161 of the hydrophobic nonwoven fabric sheet 35. Therefore, the hot-melt adhesive 137a is less likely to migrate to or come into contact with the ink in the graphic layer 143 disposed on the non-skin-side surface of the liquid-impermeable sheet 29. This prevents the hot-melt adhesive 137a from dissolving or peeling off the ink. This more reliably maintains the functionality of the graphic layer 143. Furthermore, because the high-density layer 163 is present on the non-skin side of the hydrophobic nonwoven fabric sheet 35, even if the first oily component penetrates through the breathable, liquid-impermeable sheet 29, reaches the graphic layer 143, and causes the ink to peel off, the ink is prevented from leaking outside (to the non-skin side) of the high-density layer 163. Furthermore, because the second low-density layer 165 is present, even if the peeled-off ink reaches the high-density layer 163, the presence of the second low-density layer 165 prevents the ink from reaching the outside of the second low-density layer 165 due to the coarse-to-dense gradient.

[0095] The shorts-type napkin 1 may include a ventral-side second outer sheet 113a, a first outer sheet 111, or a back-side second outer sheet 113b as an additional hydrophobic nonwoven fabric sheet located in the oily component-disposing region 41 and adjacent to the non-skin side of the hydrophobic nonwoven fabric sheet 35 in a plan view in the unfolded state ( FIG. 6 ). Specifically, in the multiple-sheet region 53 in the ventral region 7, the ventral-side second outer sheet 113a corresponds to the additional hydrophobic nonwoven fabric sheet. In the single-sheet region 51 in the ventral region 7 and the back region 9, the first outer sheet 111 corresponds to the additional hydrophobic nonwoven fabric sheet. In the multiple-sheet region 53 in the back region 9, the back-side second outer sheet 113b corresponds to the additional hydrophobic nonwoven fabric sheet. As a result, even if the first oily component or excrement penetrates through the liquid-impermeable sheet 29, it is more difficult for it to reach the outside than the hydrophobic nonwoven fabric sheet 35 and the ventral second outer sheet 113a, the first outer sheet 111, and the dorsal second outer sheet 113b, which correspond to the additional hydrophobic nonwoven fabric sheets.

[0096] The elastic members 31 (main body elastic members) extending along the longitudinal direction L, i.e., the elastic member arrangement region 33, may overlap the oily component arrangement region 41 (as the first oily component) and the graphic layer 143 in the thickness direction T at the center of the longitudinal direction L of the shorts-type napkin 1. In this case, in the shorts-type napkin 1, the elastic members 31 contract in response to body movement, fitting the absorbent main body 3 into the buttocks groove, making it easier to separate the region where the graphic layer 143 is arranged in the central region of the shorts-type napkin 1 in the longitudinal direction L, i.e., the crotch region that is prone to rubbing against clothing, from clothing. This more reliably prevents deterioration of the function of the graphic layer 143 and improves the absorbency of the absorbent main body. However, the crotch region in the longitudinal direction L of the shorts-type napkin 1 is the central region when the longitudinal direction L of the shorts-type napkin 1 is divided into approximately three equal parts.

[0097] The multiple back elastic members 117, arranged in the back region in the longitudinal direction L and extending along the width direction W, may overlap the oily component-distributing region 41 (the first oily component) and the graphic layer 143 in the thickness direction T in the back region 9 in the longitudinal direction L of the shorts-type napkin 1. In this case, in the shorts-type napkin 1, the multiple back elastic members 117 contract in response to body movement, fitting the absorbent main body 3 into the buttocks groove, making it easier to separate the region in the central portion of the shorts-type napkin 1 in the longitudinal direction L where the graphic layer 143 is arranged, i.e., the crotch region that is prone to rubbing against clothing, from clothing. This more reliably prevents deterioration of the functionality of the graphic layer 143 and improves the absorbency of the absorbent main body. However, the crotch region in the longitudinal direction L of the shorts-type napkin 1 remains as described above.

[0098] 9, a pair of compressed sections 37 extending along the longitudinal direction L and aligned at a distance in the width direction W may overlap the oily component distribution region 41 (as the first oily component) and the graphic layer 143 in the thickness direction T at the center of the width direction W of the shorts-type napkin 1. In this case, in the shorts-type napkin 1, the pair of compressed sections 37 (which may also be low basis weight sections or slit sections) deform the center of the absorbent main body 3 in the width direction W into a convex shape upward in the thickness direction T, making it easier to draw in bodily fluids and to separate that section from clothing. This more reliably prevents deterioration of the function of the graphic layer 143 and improves the absorbency of the absorbent main body 3.

[0099] The second oily component may be, for example, a hot melt adhesive that bonds the components of the shorts-type napkin 1 together. In this case, the hot melt adhesive, which is the second oily component, is disposed in a region of the oily component-disposing region 41 that does not overlap with the first oily component in the thickness direction T. In other words, the hot melt adhesive is disposed in a location that is unlikely to come into contact with the first oily component, even if the first oily component moves with excrement such as menstrual blood. In this way, the hot melt adhesive and the first oily component are positioned in a way that makes it unlikely for the hot melt adhesive to come into contact with each other, thereby preventing the first oily component from reducing the bonding strength of the hot melt adhesive even after excrement has been absorbed. This prevents stuffiness due to the moisture permeability of the liquid-impermeable sheet 29, while maintaining the functionality of the hot melt adhesive. Furthermore, even if the bonding strength of other hot melt adhesives in the region that overlaps with the first oily component in the thickness direction T is reduced by the first oily component, the bonding can be maintained by the hot melt adhesive in the region that does not overlap with the first oily component in the thickness direction T.

[0100] The second oily component may be, for example, a hot melt adhesive (exterior body adhesive) 131a at the inter-body joint 131 that joins the absorbent body 3 and the exterior body 5, among the hot melt adhesives that join the constituent components of the shorts-type napkin 1. In this case, the hot melt adhesive (exterior body adhesive) 131a is disposed in a location that is unlikely to come into contact with the first oily component, such as a region of the oily component-disposing region 41 that does not overlap with the first oily component in the thickness direction T. Therefore, even if the first oily component migrates along with excrement such as menstrual blood and passes through the moisture-permeable, liquid-impermeable sheet, it is unlikely to come into contact with the exterior body adhesive. This prevents the first oily component from reducing the bonding strength of the hot melt adhesive (exterior body adhesive) 131a. This allows the functionality of the hot melt adhesive (exterior body adhesive) 131a to be maintained. Furthermore, even if the bonding strength of other hot melt adhesives (exterior body adhesives) 131a in areas that overlap with the first oily component in the thickness direction T is reduced by the first oily component, the bonding can be maintained by the hot melt adhesives (exterior body adhesives) 131a in areas that do not overlap with the first oily component in the thickness direction T.

[0101] 7 and 8 , the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / back-side second outer sheet 113b are joined to each other by a main body joint 131. The main body joint 131 is formed of a plurality of hot melt adhesives (outer body adhesives) 131a that extend spirally in the longitudinal direction L and are spaced at regular intervals in the width direction W, at least within the oily component distribution region 41 in a plan view in the unfolded state. In this embodiment, the main body joint 131 is formed of a plurality of hot melt adhesives 131a that extend spirally in the longitudinal direction L and are spaced at regular intervals in the width direction W over the entire surfaces of the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / back-side second outer sheet 113b. Therefore, when the main body joint 131 is cut along any straight line parallel to the longitudinal direction L, the hot melt adhesives (outer body adhesives) 131a are intermittently arranged in the longitudinal direction L. Furthermore, when inter-main body joint 131 is cut along any straight line parallel to width direction W, hot melt adhesive (exterior body adhesive) 131a is disposed intermittently in width direction W. Furthermore, inter-film nonwoven fabric joint 137 and inter-main body joint 131 have non-overlapping joint portions (not shown) that do not overlap with each other in thickness direction T.

[0102] Thus, in the shorts-type napkin 1, the hot melt adhesive 131a at the inter-body joint 131 joining the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / back-side second outer sheet 113b may be intermittently formed in the longitudinal direction L and the width direction W. In this case, even if the first oily component passes through the moisture-permeable, liquid-impermeable sheet 29 and reaches the hot melt adhesive 131a, reducing the bonding strength of part of the hot melt adhesive 131a, the reduction in bonding strength in other parts of the intermittently formed hot melt adhesive 131a can be suppressed. This makes it possible to maintain both moisture permeability and adhesive strength.

[0103] 7 and 8 , in the portion where the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / dorsal-side second outer sheet 113b are not joined, gaps 151 are likely to be formed between the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / dorsal-side second outer sheet 113b. As a result, even if menstrual blood, etc. 155 that has permeated the fine openings 153 of the liquid-impermeable sheet 29 permeates the hydrophobic nonwoven fabric sheet 35, it is less likely to reach the first outer sheet 111 / dorsal-side second outer sheet 113b and less likely to reach beyond the first outer sheet 111 / dorsal-side second outer sheet 113b, thereby preventing menstrual blood, etc. from adhering to other articles.

[0104] The width W dimension of the region of the inter-body joint 131 formed with the hot melt adhesive (exterior body adhesive) 131a may be larger than the width W dimension of the oily component distribution region 41 in which the first oily component is disposed. That is, the width of the region of the inter-body joint 131 may be wider than the width of the oily component distribution region 41. In this case, even if the first oily component passes through the moisture-permeable liquid-impermeable sheet 29 and reaches the hot melt adhesive 131a, reducing the bonding strength of a portion of the hot melt adhesive 131a, the reduction in bonding strength of the hot melt adhesive 131a in the region of the wide exterior body adhesive that does not overlap with the first oily component in the thickness direction of the oily component distribution region 41 can be suppressed. This makes it possible to maintain both the moisture permeability of the liquid-impermeable sheet 29 and the adhesive strength of the hot melt adhesive (exterior body adhesive) 131a.

[0105] In this embodiment, the inter-body joint 131 is disposed over the entire area where the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 (in the case of FIG. 7) / the back-side second outer sheet 113b (in the case of FIG. 8) overlap in the thickness direction T in a plan view in the unfolded state. Therefore, the width of the inter-body joint 131 is approximately the same as the width of the absorbent body 3. On the other hand, the oily component-disposing region 41 is disposed further inward in the width direction W and the longitudinal direction L than the absorbent body 27 in a plan view in the unfolded state. Therefore, the width of the oily component-disposing region 41 is smaller than the width of the absorbent body 3 (in the case of FIG. 5 or FIG. 9). Therefore, the inter-body joint 131 has a larger dimension in the width direction W and a larger dimension in the longitudinal direction L than the oily component-disposing region 41, and therefore has a portion formed to surround the oily component-disposing region 41. This makes it possible to more reliably maintain both the moisture permeability of the liquid-impermeable sheet 29 and the adhesive strength of the hot melt adhesive (exterior body adhesive) 131a.

[0106] The hot melt adhesive (outer body adhesive) 131a of the inter-main body joint 131 may also be disposed in an area overlapping with the first oily component in the thickness direction T in a plan view in the unfolded state. In this case, the hot melt adhesive (outer body adhesive) 131a has both a portion that overlaps with the first oily component in the thickness direction T and a portion that does not. This more reliably prevents the first oily component from reducing the bonding strength in the portion where the hot melt adhesive (outer body adhesive) 131a does not overlap with the first oily component in the thickness direction T. Furthermore, by having the hot melt adhesive (outer body adhesive) 131a not only in a portion that does not overlap with the first oily component in the thickness direction T but also in a portion that does overlap, the area where the hot melt adhesive (outer body adhesive) 131a is disposed becomes wider, which more reliably prevents the absorbent main body 3 from coming off the outer body 5 due to friction.

[0107] Furthermore, as described above, the hydrophobic nonwoven fabric sheet 35 may include, in order from the liquid-impermeable sheet 29 side, a first low-density layer 161, a high-density layer 163, and a second low-density layer 165. In this case, the hot-melt adhesive 131a (exterior body adhesive) of the inter-body joint 131 that bonds the absorbent main body 3 and the exterior body 5 easily permeates into the first low-density layer 161 of the hydrophobic nonwoven fabric sheet 35. Therefore, even if the first oily component permeates through the moisture-permeable liquid-impermeable sheet 29, the hot-melt adhesive 131a (exterior body adhesive) can be made difficult to peel off from the hydrophobic nonwoven fabric sheet 35. Furthermore, because the high-density layer 163 is present on the non-skin side of the hydrophobic nonwoven fabric sheet 35, even if the first oily component penetrates through the moisture-permeable, liquid-impermeable sheet 29 and the hot-melt adhesive 131a (exterior body adhesive) peels off, the hot-melt adhesive 131a (exterior body adhesive) can be prevented from flowing outward (toward the skin side) beyond the high-density layer 163. Furthermore, because the second low-density layer 165 is present, even if the peeled-off hot-melt adhesive reaches the high-density layer 163, the presence of the second low-density layer 165 prevents the adhesive from reaching the outside of the second low-density layer 165 due to the coarse-to-dense gradient.

[0108] The second oily component may be, for example, a hot-melt adhesive (side adhesive) used to bond the hydrophobic nonwoven fabric sheets 35 (side sheets) that form the pair of leak-barrier walls 43. Examples of hot-melt adhesives used to bond the hydrophobic nonwoven fabric sheets 35 include the leak-barrier adhesive at the leak-barrier joint 141 and the edge adhesive at the edge joint 139. Such hot-melt adhesives are disposed in areas that are unlikely to come into contact with the first oily component, such as areas that do not overlap with the first oily component in the thickness direction T. Therefore, even if the first oily component (e.g., a modifier or skin care agent) migrates and reaches the hot-melt adhesive (side adhesive), it is unlikely to come into contact with the hot-melt adhesive (side adhesive). This prevents the first oily component from reducing the bonding strength of the hot-melt adhesive (side adhesive), thereby maintaining the functionality of the hot-melt adhesive (side adhesive). Furthermore, problems are less likely to occur even if the bonding strength of other hot melt adhesives (side adhesives) in the region overlapping with the first oily component in the thickness direction T is reduced by the first oily component.

[0109] The first oily component may be disposed so as to be exposed on the skin-side surface of the top sheet 21 (skin-side sheet). In this case, the edge adhesive (side adhesive) of the edge joint 139, which is the second oily component, is disposed at a position away from the inner edge in the width direction W of the hydrophobic nonwoven fabric sheet 35 (side sheet) so as not to be exposed on the skin-side surface of the top sheet 21 (skin-side sheet). In this way, the first oily component can be exposed on the skin-side surface of the top sheet 21 to enhance its functionality, and the edge adhesive of the edge joint 139 is disposed at a position away from the inner edge in the width direction W of the hydrophobic nonwoven fabric sheet 35 (the inner edge of the edge joint 139, which is in the same position as the inner edge of the leakage barrier 43 in the width direction W) so as not to be exposed on the skin-side surface of the top sheet 21, thereby increasing adhesive strength while suppressing damage to the skin surface.

[0110] The first oily component may be positioned closer to the center in the longitudinal direction L and the width direction W than the second oily component, which is the end adhesive (side adhesive) of end joint 139. In this case, even if the first oily component diffuses, the end adhesive of end joint 139 is located away from the first oily component, which makes it possible to suppress a decrease in the bonding strength of the end adhesive and maintain the uprightness of leakage preventing wall 43, thereby making it possible to continue to prevent side leakage.

[0111] In the shorts-type napkin 1, the leakage barrier adhesive of the leakage barrier joint 141 may be positioned further outward in the width direction W than the first oily component, i.e., in a location less likely to come into contact with the first oily component. In this case, even if the first oily component moves, it is less likely to come into contact with the leakage barrier adhesive. This prevents the first oily component from reducing the bonding strength of the leakage barrier adhesive. This allows the functionality of the leakage barrier adhesive to be maintained. Furthermore, problems are less likely to occur even if the bonding strength of other outer body adhesives in the region overlapping with the first oily component in the thickness direction T is reduced by the first oily component.

[0112] The components constituting the absorbent main body 3, such as the top sheet 21, the second sheet 25, the absorbent core 27a, the core wrap 27b, the liquid-impermeable sheet 29, the elastic members 31, the hydrophobic nonwoven fabric sheet 35, the leakage-barrier elastic members 45, the ventral-side elastic members 115, the dorsal-side elastic members 117, and the rear-side leg-hole elastic members 119, and the components constituting the exterior body 5, such as the first exterior sheet 111, the ventral-side second exterior sheet 113a, and the dorsal-side second exterior sheet 113b, can be made of conventionally known materials. However, some components must satisfy the requirements described below.

[0113] In the oily component arrangement region, the first oily component is preferably 0.01 g / m from the viewpoint of its action. ２ More preferably, 0.1 g / m ２ More preferably, 0.5 g / m ２ In addition, in the oily component placement region, the first oily component is preferably placed at a basis weight of 20 g / m or more from the viewpoint of its action. ２ or less, more preferably 10 g / m ２ less than, and more preferably 5 g / m ２ Arranged at the following basis weights:

[0114] The liquid-impermeable sheet is made of a moisture-permeable film. The liquid-impermeable sheet preferably has a moisture content of 1500 g / m ２ 24 hours or more, and more preferably 3000 g / m ２ The liquid-impermeable sheet preferably has a moisture permeability of 7200 g / m ２ 24 hours or less, and more preferably 6500 g / m ２ - Moisture permeability of 24 hours or less. This is from the viewpoint of suppressing stuffiness. In the present disclosure, the moisture permeability can be measured in accordance with JIS Z0208-1976 "Test method for moisture permeability of moisture-proof packaging materials (cup method)." The temperature and humidity conditions for the test are a temperature of 40±0.5°C and a relative humidity of 60±2%.

[0115] From the viewpoint of liquid impermeability, the moisture-permeable film preferably satisfies the following requirements: (1) A film sample is left standing in a thermostatic chamber at 25°C ± 5°C for 24 hours. (2) 1 mL of saline is dropped onto one side of the sample using a dropper from a position 3 cm high to form a water droplet on the film. (3) After dropping the saline, it is confirmed whether the water droplet has permeated from one side to the other within 5 minutes. (4) Steps (1) to (3) are repeated three times, changing the position. (5) If the saline does not permeate the film in all three times, the film is deemed to be liquid impermeable.

[0116] The moisture-permeable film may have pores that can be visually confirmed (for example, pores larger than 20 μm), or may have minute pores that are difficult to visually confirm (for example, pores of 20 μm or less).

[0117] As used herein, the hydrophobic nonwoven sheet and optional additional hydrophobic nonwoven sheet have hydrophobic properties and are made of, for example, hydrophobic fibers. Examples of the hydrophobic fibers include synthetic fibers. The synthetic fibers include those containing a single component, such as a single fiber, and those containing multiple components, such as a composite fiber. The synthetic fibers may also be biomass plastics, recycled fibers, etc.

[0118] Examples of the above components include polyolefin-based polymers such as polyethylene and polypropylene; polyester-based polymers such as terephthalate-based polymers such as polyethylene terephthalate (PET), polybutylene terephthalate, and polypentylene terephthalate; polyamide-based polymers such as nylon 6 and nylon 6,6; acrylic-based polymers; polyacrylonitrile-based polymers; and modified products thereof.

[0119] The hydrophobic fibers may include water-repellent cellulosic fibers that have been treated with a water-repellent agent to impart water repellency. Examples of the cellulosic fibers include natural cellulosic fibers, regenerated cellulosic fibers, refined cellulosic fibers, and semi-synthetic cellulosic fibers. Examples of the natural cellulosic fibers include plant fibers such as pulp fibers, seed hair fibers (e.g., cotton fibers), bast fibers (e.g., hemp), vein fibers (e.g., Manila hemp), and fruit fibers (e.g., palm).

[0120] The pulp fibers include those known in the art as pulp fibers, such as wood pulp fibers and non-wood pulp fibers. Examples of the wood pulp fibers include softwood pulp fibers and hardwood pulp fibers. Examples of the non-wood pulp fibers include straw pulp fibers, bagasse pulp fibers, reed pulp fibers, kenaf pulp fibers, mulberry pulp fibers, bamboo pulp fibers, hemp pulp fibers, and cotton pulp fibers (e.g., cotton linter fibers). The pulp fibers may be waste paper, recycled pulp fibers, etc.

[0121] The cotton fiber includes Hirsutum cotton fiber (e.g., upland cotton), Barbadense cotton fiber, Arboreum cotton fiber, and Helbaceum cotton fiber. The cotton fiber may also be organic cotton fiber or Pre-Organic Cotton (trademark) fiber. Organic cotton fiber refers to cotton certified by GOTS (Global Organic Textile Standard).

[0122] Examples of the regenerated cellulose fibers include rayon, for example, viscose rayon obtained from viscose, polynosic and modal, and cuprammonium rayon (also called "cupra") obtained from a cuprammonium salt solution of cellulose.

[0123] The purified cellulose fiber includes lyocell, specifically, a fiber obtained by dissolving pulp in an aqueous solution of N-methylmorpholine N-oxide to form a spinning dope (dope) and extruding the dope into a dilute solution of N-methylmorpholine N-oxide. The purified cellulose is commercially available, for example, under the trade name Tencel (trademark). The semi-synthetic fiber includes semi-synthetic cellulose, such as acetate fibers, e.g., triacetate and diacetate fibers.

[0124] The ink of the graphic layer (an example of the second oil-based component) may be any conventionally known ink, such as an oil-based ink, which contains, for example, an organic solvent, a pigment, a thermoplastic resin, and additives (such as a conductive agent, a plasticizer, an antioxidant, and an ultraviolet absorber).

[0125] The oil-based ink preferably has a kinematic viscosity higher than that of the first oil-based component (e.g., blood slipping agent). The kinematic viscosity of the oil-based ink is higher than that of the first oil-based component at 40°C, and is preferably 20 to 500 mm ２ / s, more preferably 30 to 400 mm ２ / s, more preferably 40 to 300 mm ２ / s, and even more preferably 50 to 200 mm ２ / s.

[0126] The hot melt adhesives used for the inter-body joints 131, the joints within the exterior sheets 133, the core wrap joints 135, the joints between the film and nonwoven fabrics 137, the end joints 139, and the leak-proof wall joints 141 may be conventionally known, such as those made of thermoplastic synthetic resins. Examples of hot melt adhesives include ethylene vinyl acetate hot melt adhesives, polyolefin hot melt adhesives, rubber hot melt adhesives, polyamide hot melt adhesives, polyurethane hot melt adhesives, and acrylic hot melt adhesives. However, the above joints may also be joined using other conventional types of adhesives or by heat fusion.

[0127] In order to arrange the joints intermittently in the longitudinal and / or width directions, the joints may be formed, for example, in a line or dot shape extending in a predetermined direction (e.g., the longitudinal or width direction) and spaced apart in a direction perpendicular to the predetermined direction. Examples of the line joints include spiral, stripe, and Ω-shaped joints.

[0128] The hot melt adhesive (an example of the second oily component) preferably has a kinematic viscosity higher than that of the first oily component (e.g., blood slipping agent). The kinematic viscosity of the hot melt adhesive is higher than that of the first oily component at 40°C, and is preferably 1000 mm ２ / s, more preferably 5000 mm ２ / s, more preferably 10,000 mm ２ It may be in a nearly solid state at 40°C.

[0129] Furthermore, it is preferable that the hot melt adhesive at least in the joint between the film and the nonwoven fabric has a kinematic viscosity higher than that of the oil-based ink. Even in this case, the kinematic viscosity of the hot melt adhesive is as described above.

[0130] The dynamic viscosity of the first oil component (e.g., modifier, skin care agent) is preferably lower than the dynamic viscosity of the second oil component (e.g., ink, adhesive). Relatively lowering the dynamic viscosity of the first oil component facilitates the movement of the first oil component, increasing the ease of contact between the first oil component (e.g., modifier) ​​and excrement, and improving the ease of transfer of the first oil component (e.g., skin care agent) to the skin. Additionally, relatively increasing the dynamic viscosity of the second oil component makes it difficult for the second oil component (e.g., ink, adhesive) to move from its placement location, thereby ensuring its function (making it difficult for the ink to dissolve and the adhesive's adhesive properties to decrease). To further enhance the above-mentioned effects, it is preferable that the first oil component be liquid at 35°C and the second oil component be solid at 35°C.

[0131] The dynamic viscosity of the hot melt adhesive at the film-nonwoven fabric joint 137 that bonds the hydrophobic nonwoven fabric sheet 35 and the liquid-impermeable sheet 29 is preferably higher than the dynamic viscosity of the ink in the graphic layer 143. By relatively increasing the dynamic viscosity of the hot melt adhesive at the film-nonwoven fabric joint 137, the hot melt adhesive is less likely to move, making it less likely for the hot melt adhesive and the ink to mix with each other. This more reliably prevents the functionality of the graphic layer 143 from deteriorating.

[0132] The shorts-type napkin can be free of volatile cooling agents or fragrances. This prevents the first oily component from interfering with the sliding of menstrual blood down to the absorbent core, resulting in excellent menstrual blood absorption. Furthermore, the volatile cooling agents and fragrances can be prevented from irritating the area around the excretory opening, which is sensitive to menstruation.

[0133] In the present disclosure, the first oily component has the same effect as the blood slipping agent described in Patent Document 1, and plays a role in allowing menstrual blood to slide from the skin side sheet, preferably from the top sheet, to the absorbent core. The first oily component has a viscosity of preferably 0.01 to 80 mm at 40°C. ２ / s, more preferably 1 to 70 mm ２ / s, more preferably 3 to 60 mm ２ / s, and even more preferably 5 to 50 mm ２ / s, and even more preferably 7 to 45 mm ２ / s.

[0134] The first oily component has a viscosity of 0.01 to 80 mm at 40°C. ２ In order to have a kinematic viscosity of 80 mm / s, it is preferable that the melting point of the first oily component is 45°C or lower. This is because if the first oily component contains crystals at 40°C, its kinematic viscosity tends to be high. In this specification, the kinematic viscosity at 40°C may be simply referred to as "kinematic viscosity". ２ If the viscosity exceeds 1 / s, the viscosity of the first oily component will be high, and it will tend to be difficult for the first oily component to slide down from the skin side sheet, preferably from the top sheet, to the absorbent core together with menstrual blood.

[0135] The kinematic viscosity can be measured at a test temperature of 40°C using a Cannon-Fenske reverse flow viscometer in accordance with JIS K 2283:2000, "5. Kinematic viscosity test method."

[0136] The first oily component preferably has a water holding percentage of 0.01 to 4.0% by mass, more preferably 0.02 to 3.5% by mass, even more preferably 0.03 to 3.0% by mass, even more preferably 0.04 to 2.5% by mass, and even more preferably 0.05 to 2.0% by mass.

[0137] As used herein, "water holding rate" refers to the proportion of water that a substance can hold, and can be measured as follows: (1) A test tube, rubber stopper, substance to be measured, and deionized water are left standing overnight in a thermostatic chamber at 40°C. (2) In the thermostatic chamber, 5.0 g of the substance to be measured and 5.0 g of deionized water are placed in a 20 mL test tube. (3) In the thermostatic chamber, the mouth of the test tube is sealed with a rubber stopper, rotated once, and left standing for 5 minutes.

[0138] (4) In the constant temperature room, 3.0 g of the layer of the substance to be measured (usually the upper layer) is placed in a glass petri dish with a diameter of 90 mm (mass: W ０ (5) The petri dish is heated in an oven at 105°C for 3 hours to evaporate the water, and the mass of the petri dish is measured (mass: W １ (6) The water holding rate is calculated according to the following formula: Water holding rate (mass%) = 100 × (W ０ -W １ ) / 3.0 Measurements were carried out three times and the average value was used.

[0139] The first oily component preferably has a weight-average molecular weight of less than 1,000, and more preferably less than 900. If the weight-average molecular weight is 1,000 or more, the first oily component itself tends to become tacky, causing discomfort to the wearer. The first oily component preferably has a weight-average molecular weight of 100 or more, and more preferably a weight-average molecular weight of 200 or more. If the weight-average molecular weight is too small, the vapor pressure of the first oily component increases, which can lead to evaporation during storage, loss of volume, odor when worn, and other problems.

[0140] In this specification, the term "weight average molecular weight" is a concept that includes polydisperse compounds (for example, compounds produced by sequential polymerization, esters produced from a plurality of fatty acids and a plurality of aliphatic monohydric alcohols) and single compounds (for example, esters produced from one type of fatty acid and one type of aliphatic monohydric alcohol). ｉ Molecular weight M ｉ In a system consisting of molecules (i=1, or i=1, 2, ...) of the following formula: M ｗ =ΣN ｉ M ｉ ２ / ΣN ｉ M ｉ M obtained by ｗ means.

[0141] In this specification, the weight average molecular weight refers to a polystyrene-equivalent value determined by gel permeation chromatography (GPC). Measurement conditions for GPC include, for example, the following: Model: High-performance liquid chromatogram Lachrom Elite manufactured by Hitachi High-Technologies Corporation Column: SHODEX KF-801, KF-803, and KF-804 manufactured by Showa Denko K.K. Eluent: THF Flow rate: 1.0 mL / min Injection volume: 100 μL Detection: RI (differential refractometer)

[0142] Examples of the first oily component include (a １ ) an ester of a chain hydrocarbon tetraol and at least one fatty acid; ２) an ester of a linear hydrocarbon triol and at least one fatty acid; ３ ) an ester of a linear hydrocarbon diol and at least one fatty acid; (b １ ) an ether of a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol; (b ２ ) an ether of a linear hydrocarbon triol and at least one aliphatic monohydric alcohol; (b ３ (c) an ether of a chain hydrocarbon diol and at least one aliphatic monohydric alcohol; １ (c) an ester of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having four carboxyl groups with at least one aliphatic monohydric alcohol; ２ (c) an ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having three carboxyl groups with at least one aliphatic monohydric alcohol; ３ ) an ester of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having two carboxyl groups with at least one aliphatic monohydric alcohol; (d １ ) an ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol, (d ２ ) dialkyl ketone, (d ３ ) esters of fatty acids and aliphatic monohydric alcohols, (d ４ ) dialkyl carbonate, (e １ ) Polyoxy C ３ ~C ６ Alkylene glycol, (e ２ ) Polyoxy C ３ ~C ６ an ester of an alkylene glycol and at least one fatty acid, (e ３ ) Polyoxy C ３ ~C ６ an ether of an alkylene glycol and at least one aliphatic monohydric alcohol, and (f １ ) Chain alkanes.

[0143] [(a １ ) an ester of a chain hydrocarbon tetraol and at least one fatty acid] (a １) Examples of the ester of a chain hydrocarbon tetraol and at least one fatty acid include a tetraester of pentaerythritol and a fatty acid, a triester of pentaerythritol and a fatty acid, a diester of pentaerythritol and a fatty acid, and a monoester of pentaerythritol and a fatty acid.

[0144] The fatty acids include, for example, saturated fatty acids, such as C ２ ~C ３０ saturated fatty acids, such as acetic acid (C ２ ) (C ２ indicates the number of carbon atoms, the same applies below), propanoic acid (C ３ ), butanoic acid (C ４ ) and its isomers, such as 2-methylpropanoic acid (C ４ ), pentanoic acid (C ５ ) and its isomers, such as 2-methylbutanoic acid (C ５ ), 2,2-dimethylpropanoic acid (C ５ ), hexanoic acid (C ６ ), heptanoic acid (C ７ ), octanoic acid (C ８ ) and its isomers, such as 2-ethylhexanoic acid (C ８ ), nonanoic acid (C ９ ), decanoic acid (C １０ ), dodecanoic acid (C １２ ), tetradecanoic acid (C １４ ), hexadecanoic acid (C １６ ), heptadecanoic acid (C １７ ), octadecanoic acid (C １８ ), eicosanoic acid (C ２０ ), docosanoic acid (C ２２ ), tetracosanoic acid (C ２４ ), hexacosanoic acid (C ２６ ), octacosanoic acid (C ２８ ), triacontanoic acid (C ３０ ) and the like, as well as unlisted isomers thereof.

[0145] The fatty acid may also be an unsaturated fatty acid. Examples of the unsaturated fatty acid include C ３ ~C ２０unsaturated fatty acids, such as monounsaturated fatty acids, such as crotonic acid (C ４ ), myristoleic acid (C １４ ), palmitoleic acid (C １６ ), oleic acid (C １８ ), elaidic acid (C １８ ), vaccenic acid (C １８ ), gadoleic acid (C ２０ ), eicosenoic acid (C ２０ ), diunsaturated fatty acids, such as linoleic acid (C １８ ), eicosadienoic acid (C ２０ ), triunsaturated fatty acids, such as linolenic acid, e.g., α-linolenic acid (C １８ ) and γ-linolenic acid (C １８ ), pinolenic acid (C １８ ), eleostearic acid, for example, α-eleostearic acid (C １８ ) and β-eleostearic acid (C １８ ), Mead acid (C ２０ ), dihomo-γ-linolenic acid (C ２０ ), eicosatrienoic acid (C ２０ ), tetraunsaturated fatty acids, for example, stearidonic acid (C ２０ ), arachidonic acid (C ２０ ), eicosatetraenoic acid (C ２０ ), etc., pentaunsaturated fatty acids, for example, boseopentaenoic acid (C １８ ), eicosapentaenoic acid (C ２０ ) and the like, as well as partial hydrogen adducts thereof.

[0146] The ester of pentaerythritol and a fatty acid is preferably an ester of pentaerythritol and a fatty acid derived from a saturated fatty acid, i.e., an ester of pentaerythritol and a saturated fatty acid, in consideration of the possibility of denaturation due to oxidation, etc. Furthermore, the ester of pentaerythritol and a fatty acid is preferably a diester, triester, or tetraester, more preferably a triester or tetraester, and even more preferably a tetraester, in terms of reducing the water holding percentage.

[0147] Commercially available products of the above-mentioned esters of pentaerythritol and fatty acids include Unistar H-408BRS and H-2408BRS-22 (mixture) (both manufactured by NOF Corporation).

[0148] [(a ２ ) an ester of a chain hydrocarbon triol and at least one fatty acid] (a ２ ) Examples of the ester of a chain hydrocarbon triol and at least one fatty acid include triesters of glycerin and fatty acids, diesters of glycerin and fatty acids, and monoesters of glycerin and fatty acids.

[0149] The fatty acid is as described above. From the viewpoint of reducing the water holding percentage, the ester of glycerin and fatty acid is preferably a diester or triester, and more preferably a triester.

[0150] Examples of the triester of glycerin and two or more fatty acids include a triester of glycerin and octanoic acid (C ８ ) and decanoic acid (C １０ ), triester of glycerin and octanoic acid (C ８ ), decanoic acid (C １０ ) and dodecanoic acid (C １２ ), triester of glycerin and octanoic acid (C ８ ), decanoic acid (C １０ ), dodecanoic acid (C １２ ), tetradecanoic acid (C １４ ), hexadecanoic acid (C １６ ) and octadecanoic acid (C １８ ) triesters, etc.

[0151] From the viewpoint of achieving a melting point of 45°C or less, the triester of glycerin and a fatty acid preferably has a total carbon number of the fatty acids constituting the triester of glycerin and a fatty acid of about 40 or less.

[0152] Commercially available triesters of glycerin and fatty acids include tri-coconut oil fatty acid glyceride, NA36, Panasate 800, Panasate 800B, and Panasate 810S, as well as tri-C2L oil fatty acid glyceride and tri-CL oil fatty acid glyceride (all manufactured by NOF Corporation).

[0153] [(a ３ ) an ester of a chain hydrocarbon diol and at least one fatty acid] (a ３ ) Examples of the ester of a chain hydrocarbon diol and at least one fatty acid include C ２ ~C ６ A chain hydrocarbon diol, for example, ２ ~C ６ Examples of the glycols include monoesters or diesters of fatty acids with glycols such as ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, or hexylene glycol.

[0154] The fatty acids include "(a １ ) Ester of a chain hydrocarbon tetraol and at least one fatty acid. ２ ~C ６ As for the ester of glycol and fatty acid, taking into consideration the possibility of denaturation due to oxidation etc., C ２ ~C ６ Esters of glycols and fatty acids, i.e., C ２ ~C ６ Preferably, it is an ester of a glycol and a saturated fatty acid.

[0155] In addition, the above C ２ ~C ６ From the viewpoint of reducing the water holding percentage, the ester of glycol and fatty acid is preferably an ester of glycol and fatty acid derived from glycol having a large carbon number, for example, an ester of glycol and fatty acid derived from butylene glycol, pentylene glycol or hexylene glycol. ２ ~C ６The ester of glycol and fatty acid is preferably a diester from the viewpoint of reducing the water holding percentage. ２ ~C ６ Commercially available glycol-fatty acid esters include, for example, Compol BL and Compol BS (both manufactured by NOF Corporation).

[0156] [(b １ (b) an ether of a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol; １ ) Examples of the ethers of a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol include tetraethers, triethers, diethers and monoethers of pentaerythritol and an aliphatic monohydric alcohol.

[0157] Examples of the aliphatic monohydric alcohol include saturated aliphatic monohydric alcohols and unsaturated aliphatic monohydric alcohols. Examples of the saturated aliphatic monohydric alcohol include C １ ~C ２０ saturated aliphatic monohydric alcohols, such as methyl alcohol (C １ ) (C １ indicates the number of carbon atoms, the same applies below), ethyl alcohol (C ２ ), propyl alcohol (C ３ ) and its isomers, such as isopropyl alcohol (C ３ ), butyl alcohol (C ４ ) and its isomers, such as sec-butyl alcohol (C ４ ) and tert-butyl alcohol (C ４ ), pentyl alcohol (C ５ ), hexyl alcohol (C ６ ), heptyl alcohol (C ７ ), octyl alcohol (C ８ ) and its isomers, such as 2-ethylhexyl alcohol (C ８ ), nonyl alcohol (C ９ ), decyl alcohol (C １０ ), dodecyl alcohol (C １２ ), tetradecyl alcohol (C １４), hexadecyl alcohol (C １６ ), hepradecyl alcohol (C １７ ), octadecyl alcohol (C １８ ), and eicosyl alcohol (C ２０ ), as well as unlisted isomers thereof.

[0158] Examples of the unsaturated aliphatic monohydric alcohol include those in which one of the C-C single bonds of the saturated aliphatic monohydric alcohols is substituted with a C=C double bond, such as oleyl alcohol, which is commercially available from New Japan Chemical Co., Ltd. under the names of the Rikacol series and the Angecool series.

[0159] [(b ２ ) an ether of a linear hydrocarbon triol and at least one aliphatic monohydric alcohol; ２ ) Examples of the ethers of a chain hydrocarbon triol and at least one aliphatic monohydric alcohol include triethers, diethers, and monoethers of glycerin and an aliphatic monohydric alcohol. The aliphatic monohydric alcohol is as described above.

[0160] [(b ３ (b) an ether of a chain hydrocarbon diol and at least one aliphatic monohydric alcohol; ３ ) As the ether of a chain hydrocarbon diol and at least one aliphatic monohydric alcohol, C ２ ~C ６ Diether of glycol and aliphatic monohydric alcohol, C ２ ~C ６ and monoethers of glycols and aliphatic monohydric alcohols, the aliphatic monohydric alcohols being as described above.

[0161] [(c １ (c) an ester of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having four carboxyl groups with at least one aliphatic monohydric alcohol. １) Examples of the esters of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having four carboxyl groups and at least one aliphatic monohydric alcohol include monoesters, diesters, triesters, and tetraesters of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having four carboxyl groups and at least one aliphatic monohydric alcohol, preferably diesters, triesters, and tetraesters, more preferably triesters and tetraesters, and even more preferably tetraesters.

[0162] Examples of the chain hydrocarbon tetracarboxylic acid include alkanetetracarboxylic acids such as butanetetraacid, pentanetetraacid, hexanetetraacid, heptanetetraacid, octanetetraacid, nonanetetraacid, and decanetetraacid. The aliphatic monohydric alcohol is as described above.

[0163] [(c ２ (c) an ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having three carboxyl groups with at least one aliphatic monohydric alcohol. ２ ) Examples of the esters of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having three carboxyl groups and at least one aliphatic monohydric alcohol include monoesters, diesters, and triesters, preferably diesters and triesters, and more preferably triesters, of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having three carboxyl groups and at least one aliphatic monohydric alcohol.

[0164] Examples of the linear hydrocarbon tricarboxylic acid include alkane tricarboxylic acids such as propane triacid, butane triacid, pentane triacid, hexane triacid, heptane triacid, octane triacid, nonane triacid, and decane triacid. The aliphatic monohydric alcohols are as described above. An example is O-acetyl tributyl citrate, which is commercially available.

[0165] [(c ３(c) an ester of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxo acid having two carboxyl groups and at least one aliphatic monohydric alcohol. ３ ) Examples of the esters of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having two carboxyl groups and at least one aliphatic monohydric alcohol include monoesters and diesters, preferably diesters, of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid, or oxo acid having two carboxyl groups and at least one aliphatic monohydric alcohol.

[0166] Examples of the linear hydrocarbon dicarboxylic acid include alkane dicarboxylic acids such as ethanedioic acid, propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid, and decanedioic acid. The aliphatic monohydric alcohols are as described above. An example is dioctyl adipate, which is commercially available.

[0167] [(d １ ) Ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol] The ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol is preferably a carboxylic acid ester represented by the following formula (1): １ OR ２ (1) (wherein, R １ and R ２ and each of R is a chain hydrocarbon. １ OH and R ２ The groups corresponding to OH are as described above.

[0168] [(d ２ ) Dialkyl ketone] The dialkyl ketone may be a ketone represented by the following formula (2): ３ COR ４ (2) (wherein, R ３ and R ４wherein each of the is an alkyl group. The dialkyl ketones are commercially available, or can be obtained by known methods, for example, by oxidizing a secondary alcohol with chromic acid or the like.

[0169] [(d ３ ) Ester of fatty acid and aliphatic monohydric alcohol] Examples of the ester of fatty acid and aliphatic monohydric alcohol include an ester of fatty acid and aliphatic monohydric alcohol represented by the following formula (3): ５ COOR ６ (3) (wherein, R ５ and R ６ are each a chain hydrocarbon).

[0170] The fatty acid constituting the ester (in formula (3), R ５ Examples of the aliphatic monohydric alcohol (corresponding to R COOH) that constitutes the ester include the above-mentioned fatty acids, and saturated fatty acids are preferred in view of the possibility of denaturation due to oxidation, etc. ６ Examples of the alkyl group (corresponding to OH) include the above-mentioned aliphatic monohydric alcohols.

[0171] Examples of the esters of the fatty acids and aliphatic monohydric alcohols include dodecanoic acid (C １２ ) and dodecyl alcohol (C １２ ), esters with tetradecanoic acid (C １４ ) and dodecyl alcohol (C １２ Examples of commercially available esters of the above fatty acids and aliphatic monohydric alcohols include Electol WE 20 and Electol WE 40 (both manufactured by NOF Corporation).

[0172] [(d ４ ) Dialkyl Carbonate] The dialkyl carbonate may be a dialkyl carbonate represented by the following formula (4): ７ OC(=O)OR ８ (4) (wherein, R ７ and R ８wherein each of is an alkyl group. The dialkyl carbonates are commercially available, or can be synthesized by the reaction of phosgene with an alcohol, the reaction of a chloroformate with an alcohol or an alcoholate, or the reaction of silver carbonate with an alkyl iodide.

[0173] [(e １ ) Polyoxy C ３ ~C ６ alkylene glycol] Polyoxy C ３ ~C ６ The alkylene glycol is i) oxyC ３ ~C ６ The term "polyC" refers to a homopolymer having an alkylene skeleton, i.e., any one skeleton selected from the group consisting of an oxypropylene skeleton, an oxybutylene skeleton, an oxypentylene skeleton, and an oxyhexylene skeleton, and having hydroxy groups at both ends, ii) a block copolymer having two or more skeletons selected from the above group and having hydroxy groups at both ends, or iii) a random copolymer having two or more skeletons selected from the above group and having hydroxy groups at both ends. ３ ~C ６ Commercially available alkylene glycols include, for example, Uniol (trademark) PB-500 and PB-700 (both manufactured by NOF Corporation).

[0174] [(e ２ ) Polyoxy C ３ ~C ６ an ester of alkylene glycol and at least one fatty acid] ３ ~C ６ The ester of alkylene glycol and at least one fatty acid may be "(e １ ) Polyoxy C ３ ~C ６ Polyoxy C explained in the "Alkylene Glycol" section ３ ~C ６ Examples include alkylene glycols in which one or both of the OH terminals are esterified with a fatty acid, i.e., monoesters and diesters. The fatty acids are as described above.

[0175] [(e ３ ) Polyoxy C ３ ~C ６ an ether of an alkylene glycol and at least one aliphatic monohydric alcohol] ３ ~C ６ The ether of alkylene glycol and at least one aliphatic monohydric alcohol is １ ) Polyoxy C ３ ~C ６ Polyoxy C explained in the "Alkylene Glycol" section ３ ~C ６ Examples of the alkylene glycol include those in which one or both of the OH terminals of the alkylene glycol are etherified with an aliphatic monohydric alcohol, i.e., monoethers and diethers. The aliphatic monohydric alcohols are as described above.

[0176] [(f １ ) Chain alkanes] (f １ Examples of the chain alkanes include linear alkanes and branched alkanes. Commercially available products of the hydrocarbons include Parleam 6 (NOF Corporation).

[0177] The shorts-type absorbent article of the present invention is not limited to the above-described embodiment, and suitable combinations and modifications can be made without departing from the object and spirit of the present invention.

[0178] REFERENCE SIGNS LIST 1 shorts-type napkin 3 absorbent body 5 exterior body 21 top sheet 27 absorbent body 27a absorbent core 27b core wrap 35 hydrophobic nonwoven fabric sheet 41 oily component placement region (first oily component, blood slipping agent) 143 graphic layer (second oily component, ink)

Claims

1. A shorts-type absorbent article comprising an absorbent main body and an exterior body, wherein the shorts-type absorbent article has, in an unfolded state, longitudinal, width and thickness directions which are perpendicular to one another, the absorbent main body comprising: an absorbent core; a skin-side sheet which is arranged on the skin side of the absorbent core and is liquid permeable; a liquid-impermeable sheet which is arranged on the non-skin side of the absorbent core; and a first oily component which is arranged on the skin-side sheet or the absorbent core, the absorbent main body or the exterior body comprising a hydrophobic nonwoven fabric sheet which is arranged on the non-skin side of the liquid-impermeable sheet, and the shorts-type absorbent article has, in a plan view in the unfolded state, at least a region which does not overlap with the first oily component in the thickness direction, and which is arranged on the skin side of the skin-side sheet or on the non-skin side of the liquid-impermeable sheet.

2. The shorts-type absorbent article according to claim 1, wherein the kinetic viscosity of the first oily component is lower than the kinetic viscosity of the second oily component.

3. A shorts-type absorbent article according to claim 1 or 2, wherein the liquid-impermeable sheet is moisture-permeable, the liquid-impermeable sheet has a graphic layer disposed on the non-skin-facing surface, and the second oil-based component is ink contained in the graphic layer.

4. The shorts-type absorbent article according to claim 3, wherein the graphic layer is also disposed in an area overlapping the first oily component in the thickness direction.

5. The shorts-type absorbent article according to claim 3, wherein the hydrophobic nonwoven fabric sheet is bonded to the liquid-impermeable sheet with an adhesive so as to cover the non-skin side of the graphic layer.

6. The shorts-type absorbent article according to claim 5, wherein the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is formed intermittently in the longitudinal direction and the width direction.

7. The shorts-type absorbent article according to claim 5, wherein the dynamic viscosity of the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is higher than the dynamic viscosity of the ink.

8. The shorts-type absorbent article according to claim 5, wherein the hydrophobic nonwoven fabric sheet comprises a low-density layer located on the skin-side surface facing the liquid-impermeable sheet, and a high-density layer located on the non-skin-side surface of the low-density layer.

9. A shorts-type absorbent article according to claim 3, wherein the absorbent main body comprises main body elastic members extending along the longitudinal direction, and the first oily component, the graphic layer, and the main body elastic members overlap in the thickness direction at the central part of the shorts-type absorbent article in the longitudinal direction.

10. A shorts-type absorbent article as described in claim 3, wherein the outer body is arranged in the rear region in the longitudinal direction and has rear elastic members extending along the width direction, and in the rear region in the longitudinal direction of the shorts-type absorbent article, the first oily component, the graphic layer, and the rear elastic members overlap in the thickness direction.

11. A shorts-type absorbent article according to claim 3, wherein the absorbent core has a pair of thin-walled portions extending along the longitudinal direction and spaced apart in the width direction, and the first oily component, the graphic layer, and the pair of thin-walled portions overlap in the thickness direction at the center of the width direction of the shorts-type absorbent article.

12. A shorts-type absorbent article according to claim 1 or 2, wherein the second oily component is an adhesive that bonds the constituent members of the shorts-type absorbent article together.

13. The shorts-type absorbent article according to claim 12, wherein the liquid-impermeable sheet is moisture-permeable, and the adhesive is an exterior body adhesive that joins the absorbent body and the exterior body.

14. The shorts-type absorbent article according to claim 13, wherein the exterior body adhesive is formed intermittently in the longitudinal direction and the width direction.

15. The shorts-type absorbent article according to claim 13, wherein the width of the region where the outer body adhesive is formed is greater than the width of the region where the first oily component is formed.

16. The shorts-type absorbent article according to claim 13, wherein the exterior body adhesive is also disposed in an area overlapping the first oily component in the thickness direction.

17. A shorts-type absorbent article as described in claim 13, wherein the outer body comprises the hydrophobic nonwoven fabric sheet, and the hydrophobic nonwoven fabric sheet includes a low-density layer located on the skin-side surface facing the liquid-impermeable sheet, and a high-density layer located on the non-skin side of the low-density layer.

18. A shorts-type absorbent article as described in claim 12, wherein the absorbent main body further comprises a pair of side sheets arranged on both sides of the skin side sheet in the width direction and extending in the longitudinal direction, and the adhesive is a side adhesive used to join the pair of side sheets.

19. A shorts-type absorbent article as described in claim 18, wherein the first oily component is arranged so as to be exposed on the skin-side surface of the skin-side sheet, and the side adhesive is arranged at a position away from the inner edge of the side sheet in the width direction so as not to be exposed on the skin-side surface of the skin-side sheet.

20. A shorts-type absorbent article as described in claim 18, wherein each of the pair of side sheets includes a leak-proof wall formed on the inside in the width direction and extending in the longitudinal direction, the leak-proof wall includes a pair of end joints in which both ends in the longitudinal direction are joined to the absorbent main body by end adhesives as the side adhesives, and the first oily component is positioned closer to the center in the longitudinal direction and the width direction than the end adhesives.

21. A shorts-type absorbent article as described in claim 12, wherein the absorbent main body has a pair of leak-preventing walls arranged at both ends in the width direction and extending in the longitudinal direction, and the adhesive is a leak-preventing wall adhesive that adheres a leak-preventing wall elastic member to each of the pair of leak-preventing walls.

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