Absorbent articles

Abstract

To provide an absorbent article capable of suppressing skin troubles caused by dryness, stuffiness, etc. [Solution] The absorbent article 1 comprises a ventral section 3 that covers the abdomen of the wearer, a dorsal section 2 that covers the back, and an absorbent body 4 that covers the crotch area and includes an absorbent body 8. The front and rear ends of the absorbent body 4 in the longitudinal direction L extend to the central parts in the width direction W of the ventral section 3 and the dorsal section 2, respectively. At least one of the ventral section 3 and the dorsal section 2 has openings OH and a moisturizing agent SC applied to at least a part of the skin contact surface in the part other than the openings OH.

Description

[Technical field]

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

[0002] There is known an absorbent article having an opening in the waist circumference part covering the waist circumference of the wearer. For example, Patent Document 1 discloses a pants-type diaper in which a liquid-permeable top sheet is arranged on the side that touches the skin of the wearer when worn, a liquid-impermeable outer layer sheet is arranged on the side that becomes the outer surface when worn, and a liquid-retentive absorbent is interposed between the top sheet and the outer layer sheet. The pants-type diaper has at least one auxiliary opening with a maximum distance of 15 mm to 50 mm. The end of the auxiliary opening on the waist opening side is located closer to the waist opening than the absorbent. According to Patent Document 1, the pants-type diaper has improved breathability due to the formation of multiple auxiliary openings, so that the inside of the pants-type diaper is less likely to become stuffy and skin troubles such as rashes are less likely to occur.

[0003] Also, absorbent articles having skin care agents are known. For example, Patent Document 2 discloses an absorbent article including at least a liquid-impermeable back sheet, an absorbent fixed on the back sheet, and a liquid-permeable top sheet covering the absorbent. The absorbent article has a water-soluble skin care agent and an oil-based skin care agent applied to a part or the whole of the surface that is in contact with the wearer's skin when worn, and at least a part of the oil-based skin care agent is present closer to the wearer's skin than the water-soluble skin care agent when worn. According to Patent Document 2, it is said that in this absorbent article, the oil-based skin care agent is present closer to the wearer's skin than the water-soluble skin care agent, so that it is possible to utilize the effects of both the oil-based skin care agent and the water-soluble skin care agent to suppress skin rash. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-267335 A [Patent Document 2] JP 2004-255164 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the pants-type diaper of Patent Document 1, sweat and moisture are discharged from the openings (auxiliary openings) around the waist, reducing stuffiness inside the pants-type diaper. However, if too much sweat is discharged from the openings, the skin may become overly dry, and even if skin rash caused by stuffiness can be avoided, the newly occurring dryness may rob the skin of its moisturizing function, leading to skin problems such as chafing. Thus, it is not easy to prevent skin problems by simply discharging sweat and moisture through the openings.

[0006] In addition, in the absorbent article of Patent Document 2, a skin care agent is applied to the surface that comes into contact with the wearer's skin when worn, thereby reducing skin rashes. However, simply applying a skin care agent is not effective in expelling sweat or moisture, and the inside of the absorbent article is prone to becoming steamy, making it difficult to prevent skin troubles.

[0007] These skin problems are particularly noticeable in people with atopic dermatitis and in infants and young children.

[0008] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide an absorbent article capable of suppressing skin troubles caused by dryness, stuffiness, and the like. [Means for solving the problem]

[0009] The absorbent article of the present invention has a longitudinal direction, a width direction and a thickness direction which are perpendicular to each other when unfolded, and comprises an abdominal portion which covers the abdomen of the wearer, a dorsal portion which covers the back, and an absorbent main body which covers the crotch area and includes an absorbent body, wherein the absorbent main body has front and rear ends in the longitudinal direction which extend to the central portions in the width direction of the abdominal portion and the dorsal portion, respectively, and at least one of the abdominal portion and the dorsal portion has an opening and a moisturizing agent applied to at least a portion of the skin contact surface in the portion other than the opening. Effect of the Invention

[0010] According to the present invention, it is possible to provide an absorbent article that can prevent skin problems caused by dryness, stuffiness, etc. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a plan view showing an example of a configuration of the absorbent article according to the first embodiment in an unfolded state. [Diagram 2] 2 is a cross-sectional view taken along a longitudinal center line CL in FIG. 1. [Diagram 3] 2 is a cross-sectional view taken along a width direction center line CW in FIG. 1. [Figure 4] FIG. 2 is a plan view in a developed state showing an application example of the moisturizing agent in FIG. [Diagram 5] 1. FIG. 4 is a plan view in a developed state showing another application example of the moisturizing agent in FIG. [Figure 6] 1. FIG. 4 is a plan view showing a developed state of still another application example of the moisturizing agent in FIG. [Figure 7] 2 is a schematic diagram showing the relationship between an opening and an elastic member in FIG. 1. [Figure 8] FIG. 11 is a plan view showing an example of a configuration of an absorbent article according to a second embodiment in an unfolded state. [Figure 9] 9 is a cross-sectional view taken along the width direction center line CW in FIG. 8. [Figure 10] FIG. 9 is a plan view in a developed state showing an application example of the moisturizing agent in FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The present embodiment relates to the following aspects.

[0013] [Aspect 1] An absorbent article having a longitudinal direction, a width direction and a thickness direction which are mutually perpendicular when unfolded, and comprising an abdominal portion which covers the abdomen of the wearer, a dorsal portion which covers the back, and an absorbent main body which covers the crotch area and includes an absorbent body, wherein the absorbent main body has front and rear ends in the longitudinal direction which extend to central portions in the width direction of the abdominal portion and the dorsal portion, respectively, and at least one of the abdominal portion and the dorsal portion has an opening and a moisturizing agent applied to at least a portion of the skin contact surface in the portion other than the opening.

[0014] This absorbent article has openings in at least one of the ventral and dorsal sections, allowing sweat and moisture to be discharged through the openings, thereby reducing stuffiness within the absorbent article. At the same time, a moisturizing agent is applied to at least a portion of the skin-contacting surface of at least one of the ventral and dorsal sections other than the openings, so that the moisture of the skin can be supplemented, thereby reducing dryness of the skin due to the discharge of sweat and moisture. In this way, by using the openings and the moisturizing agent in combination in this absorbent article, it is possible to reduce both stuffiness and dryness, thereby suppressing skin troubles and improving comfort.

[0015] [Aspect 2] The absorbent article of claim 1, wherein the moisturizing agent is applied to a portion of at least one of the ventral portion and the dorsal portion other than the opening, the portion being adjacent to the opening or a portion overlapping with the portion being adjacent to the opening in the thickness direction.

[0016] In the portion (opening end) adjacent to the opening in at least one of the ventral and dorsal portions, unintended protrusions such as burrs or steps (rigidity difference) on the edge of the opening may cause skin troubles such as chafing, in which the wearer's skin rubs against the opening end. In this absorbent article, a moisturizing agent is applied to the opening end or to the portion overlapping the opening end in the thickness direction. In this way, by applying a moisturizing agent to the portion where chafing may occur, chafing can be suppressed, and skin troubles can be further suppressed. Furthermore, the presence of a moisturizing agent in the portion (opening end) adjacent to the opening can immediately moisturize the skin, which is prone to drying due to the discharge of sweat from the opening, and therefore skin troubles can be further suppressed.

[0017] [Aspect 3] The absorbent article of claim 1 or 2, wherein at least one of the ventral portion and the dorsal portion has a stretchable region having a stretchable member that stretches in the width direction and a non-stretchable region other than the stretchable region, and the opening is located in the non-stretchable region.

[0018] In this absorbent article, the openings are not located in an elastic region having an elastic member that stretches in the width direction, but in a non-elastic region other than the elastic region. Therefore, the openings can be prevented from being blocked by the elastic member in the openings, and the breathability at the openings can be more stably ensured. This makes it possible to further reduce stuffiness inside the absorbent article and further prevent skin troubles. Furthermore, since the shape of the openings can be maintained, visibility is improved, and the breathability can be felt from the outside.

[0019] [Aspect 4] The absorbent article of claim 1 or 2, wherein at least one of the ventral portion and the dorsal portion has a stretchable region having a stretchable member that stretches in the width direction and a non-stretchable region other than the stretchable region, and the opening is located in the stretchable region.

[0020] In this absorbent article, the openings are located in a stretchable region having a stretchable member that stretches in the width direction. Therefore, when the absorbent article is worn, the openings of the openings are expanded as the ventral and dorsal parts are expanded in the width direction, so that the opening area of ​​the openings is increased. Therefore, the stretchable member improves the fit while ensuring more stable breathability at the openings. This makes it possible to further reduce stuffiness inside the absorbent article and further suppress skin troubles.

[0021] [Aspect 5] 5. The absorbent article according to aspect 4, wherein the aperture portion has a slit-shaped aperture extending in the longitudinal direction.

[0022] In this absorbent article, the openings are located in the stretchable regions and have slit-shaped openings extending in the longitudinal direction. Therefore, when the absorbent article is worn, the ventral and dorsal parts are expanded in the width direction, so that the slit-shaped openings open and the opening area of ​​the openings becomes larger. Therefore, the breathability of the openings can be more stably ensured. This can further reduce stuffiness inside the absorbent article and further prevent skin troubles.

[0023] [Aspect 6] The absorbent article of any one of claims 1 to 5, wherein the openings are present in a plurality of positions, and the openings are spaced apart in at least one of the width direction and the longitudinal direction in at least one of the ventral portion and the dorsal portion.

[0024] In the present absorbent article, the plurality of openings are arranged at intervals in at least one of the width direction and the length direction in the ventral side part and / or the back side part, so that the breathability can be more reliably ensured, thereby making it possible to further reduce stuffiness inside the absorbent article and to further prevent skin troubles.

[0025] [Aspect 7] 7. The absorbent article of any one of claims 1 to 6, wherein the opening is located outside an edge of the absorbent body in the longitudinal direction or the width direction in at least one of the ventral portion and the dorsal portion.

[0026] In this absorbent article, the openings are arranged in the ventral and / or dorsal parts at positions outside the edge of the absorbent body in the longitudinal or width direction, i.e., at positions that do not overlap with the absorbent body in the thickness direction. This prevents the openings from being blocked by the absorbent body, so that breathability at the openings can be more stably ensured. This makes it possible to further reduce stuffiness inside the absorbent article and further prevent skin troubles.

[0027] [Aspect 8] 8. The absorbent article of any one of claims 1 to 7, wherein at least one of the ventral portion and the dorsal portion further comprises a cover sheet arranged to cover the aperture.

[0028] In the absorbent article, at least one of the ventral and dorsal sections further includes a cover sheet arranged on the skin side so as to cover the openings, thereby further reducing the possibility of urine leakage, in which excrement (e.g., urine) leaks from the openings. This further reduces the possibility of urine leakage, while reducing stuffiness inside the absorbent article and making it possible to suppress skin troubles. Even if the openings are covered with a cover sheet, compared to the other areas, the openings are only covered with one cover sheet, so the air permeability is high compared to the other areas, and the ventilation function can be exhibited, allowing sweat and moisture to be discharged from the openings.

[0029] [Aspect 9] An absorbent article as described in aspect 8, wherein the cover sheet is positioned on the skin-facing surface of at least one of the ventral portion and the dorsal portion, and the moisturizer is applied to the skin-contacting surface of the cover sheet.

[0030] In this absorbent article, the cover sheet is disposed on the skin side of the ventral and / or dorsal parts, and the moisturizer is applied to the skin contact surface of the cover sheet. This allows the area of ​​the region to which the moisturizer is applied to be increased, thereby enhancing the effect of the moisturizer, such as supplementing the moisture of the skin. This makes it possible to further suppress skin troubles.

[0031] [Aspect 10] The absorbent article of embodiment 9, wherein the cover sheet is made of a hydrophobic nonwoven fabric and the moisturizing agent is made of a hydrophilic agent.

[0032] In this absorbent article, since the cover sheet is a hydrophobic nonwoven fabric and the moisturizing agent is a hydrophilic agent, the moisturizing agent does not easily penetrate into the cover sheet. Therefore, it is possible to make it easier for the moisturizing agent to remain on the skin contact surface of the cover sheet. Also, since the cover sheet is a hydrophobic nonwoven fabric, urine does not easily penetrate into the cover sheet. Therefore, the possibility of urine leakage from the openings can be significantly reduced. As a result, it is possible to reduce stuffiness inside the absorbent article while significantly reducing the possibility of urine leakage, and to suppress skin troubles.

[0033] [Aspect 11] Aspect 11. The absorbent article of any one of aspects 1 to 10, wherein the aperture is located in the rear portion.

[0034] In this absorbent article, the openings are located in the back part covering the back where sweating is more likely to occur, so that sweat and moisture can be efficiently discharged through the openings. This can further reduce stuffiness inside the absorbent article, and can further prevent skin troubles.

[0035] [Aspect 12] 12. The absorbent article of any one of claims 1 to 11, wherein the moisturizing agent is applied continuously or intermittently from one end to the other end in the width direction of at least one of the ventral portion and the dorsal portion.

[0036] In this absorbent article, the moisturizer is applied continuously or intermittently from one end to the other end in the width direction of at least one of the ventral and dorsal sections. This reduces friction with at least one of the ventral and dorsal sections over a wide area of ​​the wearer's waist. Furthermore, the area over which the moisturizer applied to at least one of the ventral and dorsal sections is transferred to the skin can be widened, so that the area over which the skin can be protected by the moisturizer can be widened. This makes it possible to further suppress skin troubles caused by skin chafing.

[0037] [Aspect 13] 13. The absorbent article of any one of aspects 1 to 12, wherein the moisturizer is applied to at least one end of the absorbent body in the longitudinal direction and the width direction so as to overlap the end in the thickness direction.

[0038] In the longitudinal and / or lateral directions, the ends of the absorbent body have high rigidity, while the portions outside the ends of the absorbent body have low rigidity. Due to this difference in rigidity, the ends of the absorbent body are prone to rubbing against the skin around the waist. Therefore, in this absorbent article, a moisturizing agent is applied to the ends of the absorbent body in the longitudinal and / or lateral directions, which have high rigidity. This reduces rubbing between the ends of the absorbent body and the skin around the waist of the wearer, thereby preventing skin troubles caused by rubbing.

[0039] [Aspect 14] 14. The absorbent article of any one of claims 1 to 13, wherein the moisturizing agent is not applied to at least one of the outer end and inner end in the longitudinal direction of at least one of the ventral portion and the dorsal portion.

[0040] When clothing or a floor surface comes into contact with the moisturizing agent, the fibers of the clothing and dust on the floor surface are adsorbed by the moisturizing agent, and the accumulated adsorbed fibers and dust may have a negative effect on the skin. In addition, the adsorbed fibers and dust may look like garbage, which may cause the absorbent article to look unsanitary. In this absorbent article, the moisturizing agent is not applied to at least one of the outer end and inner end in the longitudinal direction of at least one of the ventral part and the back part. Therefore, it is possible to prevent the fibers of the clothing and dust on the floor surface from being adsorbed to the outer end and inner end in the longitudinal direction of the ventral part and the back part, which are likely to come into contact with the wearer's clothing and the floor surface. This makes it possible to suppress the adverse effect of the adsorbed fibers on the skin and the absorbent article from looking unsanitary.

[0041] [Aspect 15] The absorbent article of any one of aspects 1 to 14, wherein the absorbent article is a pants-type disposable diaper and further comprises a side seal portion joining both widthwise ends of the ventral portion and both widthwise ends of the dorsal portion, and the moisturizer is applied to the inner widthwise end of the side seal portion.

[0042] The side seal portion that joins the ventral portion and the dorsal portion is joined by fusion such as heat sealing or sonic sealing, and since there is a hardened portion, if that portion comes into contact with the skin, there is a risk of skin damage. Therefore, in this absorbent article, a moisturizing agent is also applied to the hardened portion that may come into contact with the skin, i.e., the inner end in the width direction of the side seal portion. This reduces friction between the skin and the hardened portion of the side seal portion. Furthermore, the moisturizing agent on the surface of the side seal portion is transferred to the skin and protects the skin, preventing moisture evaporation from the skin and maintaining the moisture of the skin. And since the moisture of the skin can be maintained, it is possible to make it difficult for abrasions to occur even if friction occurs. As a result, skin troubles caused by skin chafing can be suppressed.

[0043] [Aspect 16] 16. The absorbent article of any one of aspects 1 to 15, wherein at least one of the ventral portion and the dorsal portion has a plurality of elastic members that stretch in the width direction, extend in the width direction, and are spaced apart in the longitudinal direction, the opening is located between a first elastic member and a second elastic member that are adjacent to each other in the longitudinal direction among the plurality of elastic members, the first elastic member is located further outboard in the longitudinal direction than the second elastic member, and the distance between the inner edge of the opening in the longitudinal direction and the second elastic member is longer than the distance between the outer edge of the opening in the longitudinal direction and the first elastic member.

[0044] In this absorbent article, the opening is located between the first and second elastic members adjacent to each other in the longitudinal direction, and the second elastic member on the inside is located farther away than the first elastic member on the outside in the longitudinal direction. That is, the inner part of the opening in the longitudinal direction is farther away from the elastic member than the outer part. Therefore, the inner part of the opening in the longitudinal direction is less likely to be stretched in the width direction than the outer part, and the opening is more likely to maintain a wide width. As a result, the opening is wider on the side of the absorbent body (the inner side in the longitudinal direction) that is prone to becoming stuffy in at least one of the ventral part and the dorsal part, so that the breathability at the opening can be more stably ensured. As a result, it is possible to further reduce stuffiness inside the absorbent article and further suppress skin troubles.

[0045] [Aspect 17] 16. The absorbent article of any one of aspects 1 to 15, wherein at least one of the ventral portion and the dorsal portion has a plurality of elastic members that stretch in the width direction, extend in the width direction, and are spaced apart in the longitudinal direction, the opening is located between a first elastic member and a second elastic member that are adjacent to each other in the longitudinal direction among the plurality of elastic members, the first elastic member is located further outboard in the longitudinal direction than the second elastic member, and the distance between the outer edge of the opening in the longitudinal direction and the first elastic member is longer than the distance between the inner edge of the opening in the longitudinal direction and the second elastic member.

[0046] In this absorbent article, the opening is located between the first and second elastic members adjacent to each other in the longitudinal direction, and the second elastic member on the inside is closer to the first elastic member on the outside in the longitudinal direction. That is, the inner part of the opening in the longitudinal direction is closer to the elastic member than the outer part. Therefore, the inner part of the opening in the longitudinal direction is more likely to be stretched in the width direction than the outer part, and the width of the opening is more likely to become narrow. As a result, the width of the opening is narrow on the absorber side (inner side in the longitudinal direction) of at least one of the ventral part and the dorsal part, so that the possibility of urine leakage from the opening can be significantly reduced. As a result, it is possible to suppress skin trouble while significantly reducing the possibility of urine leakage.

[0047] Hereinafter, an absorbent article according to an embodiment of the present invention will be described with reference to the drawings, taking a disposable diaper for babies as an example. However, the present invention is not limited to the embodiment and the example, and can be applied to other types of absorbent articles, such as disposable diapers for babies with different details, disposable diapers for adults, and shorts-type napkins, without departing from the subject matter of the present invention.

[0048] (First embodiment) First, a first embodiment will be described. The disposable diaper 1 of this embodiment is a pants-type. Figs. 1 to 3 are views showing the disposable diaper 1 according to this embodiment. Fig. 1 is a plan view showing an example of the configuration of the disposable diaper 1 in an unfolded state, and therefore shows a state in which the side seal portion (described later) is not joined and the elastic member (described later) is stretched. Fig. 2 is a cross-sectional view taken along a longitudinal center line CL (described later) in Fig. 1. Fig. 3 is a cross-sectional view taken along a widthwise center line CW (described later) in Fig. 1.

[0049] In the developed state shown in Figs. 1 to 3, the disposable diaper 1 has a longitudinal direction L, a width direction W, and a thickness direction T that are perpendicular to each other. A virtual line passing through the center of the width direction W of the disposable diaper 1 and extending along the longitudinal direction L is defined as a longitudinal center line CL, and a virtual line passing through the center of the longitudinal direction L and extending along the width direction W is defined as a width direction center line CW. Here, the direction and side approaching the longitudinal center line CL are defined as the inward and inner sides of the width direction W, respectively, and the direction and side moving away from the longitudinal center line CW are defined as the outward and outer sides of the width direction W, respectively. On the other hand, the direction and side approaching the width direction center line CW are defined as the inward and inner sides of the longitudinal direction L, respectively, and the direction and side moving away from the longitudinal center line CW are defined as the outward and outer sides of the longitudinal direction L, respectively. In addition, the disposable diaper 1 placed on a plane parallel to the plane including the longitudinal direction L and the width direction W is viewed from above the plane in the thickness direction T, which is referred to as a "planar view", and the shape grasped in a planar view is referred to as a "planar shape". Any direction in a plane including the longitudinal direction L and the width direction W is referred to as a "planar direction." When the disposable diaper 1 is worn, the side relatively closer to the wearer's skin surface in the thickness direction T of the disposable diaper 1 is also referred to as the "skin side" and the "non-skin side," respectively. In the disposable diaper 1, the surface that contacts the skin and the opposite surface are also referred to as the "skin contact surface" and the "non-skin contact surface," respectively. In the longitudinal direction L, the side relatively closer to the ventral side portion (described below) or the side farther from the dorsal side portion (described below) is also referred to as the ventral side or the front side, and the side relatively closer to the dorsal side portion or the side farther from the ventral side portion is also referred to as the dorsal side or the rear side. The above definitions are also used for each material of the disposable diaper 1 and for the disposable diaper 1 in a worn state.

[0050] In the disposable diaper 1, the members, structure, shape, etc. being aligned with a predetermined direction (for example, the longitudinal direction L, the width direction W, the thickness direction T) includes not only the case where the members, etc. are parallel to the predetermined direction, but also the case where they are within a range of ±30° to the predetermined direction. For curved or curved members, etc., the members, etc. are evaluated as described above for the tangents to each point on the curve, etc.

[0051] The disposable diaper 1 comprises a ventral portion 3, a dorsal portion 2, and an absorbent body 4. The ventral portion 3 is a portion of the disposable diaper 1 that covers the wearer's abdomen. The absorbent body 4 is a portion of the disposable diaper 1 that covers the wearer's crotch region and includes an absorbent body 8. The dorsal portion 2 is a portion of the disposable diaper 1 that covers the wearer's back. At least the front and rear ends in the longitudinal direction L of the absorbent body 4 extend to the center portions in the width direction W of the ventral portion 3 and the dorsal portion 2, respectively.

[0052] In this embodiment, the front and rear ends of the absorbent main body 4 are connected to the center portions in the width direction W of the abdominal part 3 and the back part 2, respectively, by, for example, an adhesive (e.g., hot melt adhesive, the same applies below). In this case, the front and rear ends of the absorbent main body 4 reach approximately the center portions in the longitudinal direction L of the abdominal part 3 and the back part 2, respectively, but may further reach approximately the outer ends in the longitudinal direction L.

[0053] The disposable diaper 1 is formed by joining together a pair of ventral joints 3a located at both ends in the width direction W of the ventral portion 3 and extending along the longitudinal direction L, and a pair of back joints 2a located at both ends in the width direction W of the back portion 2 along the longitudinal direction L. The pair of ventral joints 3a and the pair of back joints 2a joined together are also called a pair of side seals. In this case, in the disposable diaper 1, the ventral portion 3 and the back portion 2 joined together by the pair of side seals form a waist portion that covers the waist of the wearer. In addition, the outer ends of the ventral portion 3 and the back portion 2 in the longitudinal direction L define a waist opening through which the waist of the wearer passes. The region surrounding the waist opening in the waist portion, i.e., the region of the outer ends of the waist portion (ventral portion 3 and back portion 2) in the longitudinal direction L, is also called a waist region. In the disposable diaper 1, a pair of leg openings through which a pair of legs of the wearer pass are defined by both end portions in the width direction W of the absorbent main body 4 and the inner end portions in the longitudinal direction L of the abdominal portion 3 and the dorsal portion 2. The end portion of a member, etc., may vary depending on the case, but may be, for example, an area occupying a range of 30% of the length of the member, etc. from the edge of the member, etc., preferably an area occupying a range of 20%, and more preferably an area occupying a range of 10%.

[0054] In this embodiment, in the unfolded state, the abdominal portion 3 and the back portion 2 each have a rectangular shape elongated in the width direction W, and are arranged apart from each other in the longitudinal direction L. The absorbent body 4 has a rectangular shape elongated in the longitudinal direction L, and one end of the absorbent body 4 in the longitudinal direction L is connected to the abdominal portion 3, and the other end is connected to the back portion 2. The abdominal portion 3, the absorbent body 4, and the back portion 2 are formed separately from each other. Therefore, the disposable diaper 1 is a three-piece type. At least two of the abdominal portion 3, the absorbent body 4, and the back portion 2 may be formed integrally, or may be connected integrally by another exterior sheet or the like. For example, when the abdominal portion 3 and the back portion 2 share at least one of the sheet members constituting the abdominal portion 3 and the back portion 2 and are formed integrally with a continuous sheet member, the disposable diaper 1 can be said to be a two-piece type constituted by the absorbent body 4 and the abdominal portion 3. A two-piece type disposable diaper is a disposable diaper which, when unfolded, has a ventral portion, a crotch portion, a back portion, and an absorbent body, and the ventral portion, the crotch portion, and the back portion are joined together by a single sheet member, such as an outer body.

[0055] Each of the ventral part 3 and the back part 2 is formed from a liquid-impermeable sheet member. In this embodiment, each of the ventral part 3 and the back part 2 is formed from a sheet member made of hydrophobic fibers, at least in the member constituting the skin side surface (inner sheet member 31, 21: described later). Therefore, at least the surface portion of the skin side surface of the sheet member contains hydrophobic fibers. As a result, it is difficult for a hydrophilic agent to penetrate into the surface portion of the skin side surface. However, each of the ventral part 3 and the back part 2 may be formed from a sheet member made of hydrophobic fibers, even in the non-skin side surface (outer sheet member 32, 22: described later). The surface portion refers to the range of thickness from the surface of the sheet member to 1 / 4.

[0056] When the sheet member is made of hydrophobic fibers, the fibers constituting the sheet member preferably contain hydrophobic fibers at 70% by mass or more, more preferably at 80% by mass or more, even more preferably at 90% by mass or more, and may be 100% by mass. Examples of hydrophobic fibers include thermoplastic resin fibers, and examples of thermoplastic fibers include polyolefin resin fibers such as polypropylene and polyethylene, polyamide resin fibers such as 6-nylon and 6,6-nylon, and polyester resin fibers such as polyethylene terephthalate and polybutylene terephthalate. It is preferable that these thermoplastic fibers do not contain a hydrophilic agent. A sheet member containing 70% by mass or more of hydrophobic fibers can be called a hydrophobic sheet member (hydrophobic sheet).

[0057] The ventral side portion 3 is formed by stacking at least an inner sheet member 31 located on the skin side and an outer sheet member 32 located on the non-skin side in the thickness direction T and joining them with an adhesive, heat sealing, or the like (adhesive, etc., the same applies below). Similarly, the dorsal side portion 2 is formed by stacking at least an inner sheet member 21 located on the skin side and an outer sheet member 22 located on the non-skin side in the thickness direction T and joining them with an adhesive, or the like.

[0058] In this embodiment, the outer end in the longitudinal direction L of the non-skin-side outer sheet member 32 is folded back to the skin side and overlaps with the skin-side inner sheet member 31. Unless otherwise specified, the outer sheet member 32 that is folded back and positioned on the skin side is considered to be the inner sheet member 31. Similarly, the outer end in the longitudinal direction L of the non-skin-side outer sheet member 22 is folded back to the skin side and overlaps with the skin-side inner sheet member 21. In that case, the outer sheet member 22 that is folded back and positioned on the skin side is considered to be the inner sheet member 21.

[0059] In this embodiment, the inner sheet members 31, 21 and the outer sheet members 32, 22 of the ventral side portion 3 and the dorsal side portion 2 are bonded at multiple locations with a hydrophobic adhesive. Therefore, in each of the ventral side portion 3 and the dorsal side portion 2, the inner sheet members 31, 21 and the outer sheet members 32, 22 are scattered with adhesive at multiple locations.

[0060] In the abdominal portion 3, a plurality of waist elastic members 13 for waist gathering are arranged between the inner sheet member 31 located on the skin side and the outer sheet member 32 located on the non-skin side. The plurality of waist elastic members 13 extend from one end to the other end in the width direction W of the abdominal portion 3, except for at least an area overlapping with the center of the absorbent body 8 in the thickness direction T, along the width direction W, and are arranged at intervals in the longitudinal direction L. The inner sheet member 31 and the outer sheet member 32 are joined to the plurality of waist elastic members 13 by adhesive or the like. In this embodiment, a hydrophobic adhesive is used. Note that, when the abdominal portion 3 has an opening portion described later, the waist elastic member 13 may not be arranged in the opening portion or in the area in the abdominal portion 3 where one or more opening portions are arranged.

[0061] In the back side portion 2, a plurality of waist circumference elastic members 12 for waist gathering are arranged between the inner sheet member 21 located on the skin side and the outer sheet member 22 located on the non-skin side. The plurality of waist circumference elastic members 12 extend from one end of the width direction W of the back side portion 2 to the other end of the width direction W, except for at least an area overlapping with the center of the absorbent body 8 in the thickness direction T, along the width direction W, and are arranged at intervals in the longitudinal direction L. The inner sheet member 21 and the outer sheet member 22 are joined to the plurality of waist circumference elastic members 12 with an adhesive or the like. In this embodiment, a hydrophobic adhesive is used. Note that, when the back side portion 2 has an opening portion described later, the waist circumference elastic member 12 may not be arranged in the opening portion or in the area where one or more opening portions are arranged in the back side portion 2.

[0062] In this embodiment, the ventral part 3 may include a ventral cover sheet member 43 arranged on the skin side surface so as to cover the ventral end of the absorbent main body 4 in the longitudinal direction L from the skin side. The ventral cover sheet member 43 prevents the ventral end of the absorbent main body 4 from directly contacting the skin of the wearer, thereby suppressing chafing of the skin. Similarly, the dorsal part 2 may include a dorsal cover sheet member 42 arranged on the skin side surface so as to cover the dorsal end of the absorbent main body 4 in the longitudinal direction L from the skin side. The dorsal cover sheet member 42 prevents the dorsal end of the absorbent main body 4 from directly contacting the skin of the wearer, thereby suppressing chafing of the skin. Examples of materials for the ventral cover sheet member 43 and the side cover sheet member 42 include materials similar to those for the inner sheets 31 and 21.

[0063] The multiple waist elastic members 12, 13 stretch the waist part. The type of each elastic member is not particularly limited, but examples thereof include rubber in thread or sheet form. The material of each elastic member is not particularly limited, but examples thereof include styrene butadiene rubber and urethane rubber. The characteristics of each elastic member, such as the cross-sectional size (wire diameter, etc.) and the elongation ratio, are appropriately selected according to the magnitude of the tightening force corresponding to the position in the waist part.

[0064] Examples of the above-mentioned sheet members include any liquid-impermeable sheet such as a liquid-impermeable nonwoven fabric or synthetic resin film, a composite sheet of these, an SB nonwoven fabric, or an SMS nonwoven fabric. The type of nonwoven fabric is not particularly limited, and examples thereof include a meltblown nonwoven fabric, a spunbond nonwoven fabric, an airlaid nonwoven fabric, and an air-through nonwoven fabric. The material of the nonwoven fabric or synthetic resin film of the sheet member is not particularly limited as long as it can be used for sanitary products, and examples thereof include polyolefin resins such as polypropylene and polyethylene, polyamide resins such as 6-nylon and 6,6-nylon, and polyester resins such as polyethylene terephthalate and polybutylene terephthalate. The basis weight of the nonwoven fabric of the sheet member is, for example, 5 to 100 g / m 2 and preferably 10 to 50 g / m 2The length (thickness) of the sheet member in the thickness direction T is, for example, 0.1 to 5 mm, and preferably 0.1 to 2 mm. The sheet members constituting each of the ventral side portion 3 and the dorsal side portion 2 may be two sheets of the inner sheet member and the outer sheet member described above, or one sheet, or three or more sheets (not shown). The sheet members do not need to be folded (not shown). When each sheet member is a hydrophobic sheet, for example, when the sheet member contains hydrophobic fibers as the main constituent fibers, a hydrophobic material can be selected from the above materials as the material of the fibers constituting the sheet members.

[0065] In this embodiment, the disposable diaper 1 further includes an exterior sheet member 14 that bridges between the abdominal portion 3 and the back portion 2. The exterior sheet member 14 is a liquid-impermeable sheet member, for example, a nonwoven fabric, and both ends of the exterior sheet member 14 in the longitudinal direction L are laminated on the abdominal portion 3 and the back portion 2, respectively, and joined with an adhesive or the like. The type and material of the nonwoven fabric are as described above. The exterior sheet member 14 is also joined with an adhesive or the like to the non-skin side of the absorbent main body 4 that is disposed generally between the abdominal portion 3 and the back portion 2, and supports and protects the absorbent main body 4 from the non-skin side. The exterior sheet member 14 may be composed of two or more sheet members (not shown). A sheet member other than the exterior sheet member 14 may be provided on the non-skin side (not shown). The exterior sheet member 14 may be configured as a part of the absorbent main body 4.

[0066] The absorbent main body 4 has a main body central portion 10 located in the center in the width direction W and extending along the longitudinal direction L, and may further have a pair of leg gather portions 5 located at both ends in the width direction W and extending along the longitudinal direction L. Each of the pair of leg gather portions 5 extends along the longitudinal direction L and has a plurality of leg elastic members 5a arranged at intervals in the width direction W.

[0067] The main body central portion 10 has a substantially rectangular shape and includes a liquid-permeable top sheet 7, a liquid-impermeable back sheet 9, and an absorbent 8 located between the top sheet 7 and the back sheet 9, which absorbs and retains liquid (e.g., urine, menstrual blood). The absorbent 8, the top sheet 7, and the back sheet 9 are each joined with an adhesive, and the top sheet 7 and the back sheet 9 are joined with an adhesive at their peripheral portions. The shape of the main body central portion 10 is not limited to the above example as long as it is long in the longitudinal direction L, and examples of the shape include a rectangle with rounded corners, a rectangle with short sides that curve outwardly, and an hourglass shape.

[0068] Examples of the surface sheet 7 include liquid-permeable nonwoven fabrics or woven fabrics, synthetic resin films with liquid-permeable holes, composite sheets of these, and the like. Examples of the back sheet 9 include liquid-impermeable nonwoven fabrics or synthetic resin films, composite sheets of these, and SMS nonwoven fabrics. There is no particular limit to the type of nonwoven fabric, and examples of the type include meltblown nonwoven fabrics, spunbond nonwoven fabrics, airlaid nonwoven fabrics, and air-through nonwoven fabrics. There is no particular limit to the type of synthetic resin film, and known film materials can be used. There is no particular limit to the material of the nonwoven fabric or synthetic resin film as long as it can be used for sanitary products, and examples of the material include olefin-based resins such as polyethylene and polypropylene, polyamide-based resins such as 6-nylon and 6,6-nylon, and polyester-based resins such as polyethylene terephthalate and polybutylene terephthalate. Cellulosic fibers may be used as the material of the nonwoven fabric. In order to impart breathability, the synthetic resin film may contain inorganic particles such as calcium carbonate.

[0069] The absorbent 8 includes an absorbent core 8b that absorbs and retains liquid, and a core wrap 8a that encases the absorbent core 8b, and may include grooves 8c that can diffuse liquid in the longitudinal direction L and the width direction W. The material of the absorbent core 8b is an absorbent material, for example, at least one of cellulosic fibers and superabsorbent polymers. Examples of cellulosic fibers include natural cellulose fibers such as pulp fibers such as wood pulp fibers, crosslinked pulp fibers, and non-wood pulp fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers. In the case of pulp fibers, the size of the fibers may be, for example, several tens of μm in average major axis, preferably 20 to 40 μm, and, for example, several mm in average fiber length, preferably 2 to 5 mm. Examples of superabsorbent polymers (SAP) include, for example, polyacrylate-based, polysulfonate-based, and maleic anhydride-based superabsorbent polymers. The size of the superabsorbent polymer (when dry) may be, for example, several hundred μm in average particle diameter, preferably 200 to 500 μm. The basis weight of the cellulosic fiber and the highly absorbent polymer is, for example, 100 to 400 g / m 2 Examples of materials for the core wrap 8a include liquid-permeable sheets such as nonwoven fabrics and tissues.

[0070] The main body central portion 10 has a pair of leak-proof walls 6 arranged on both sides in the width direction W so as to face each other and extending along the longitudinal direction L. Each leak-proof wall 6 is formed of a leak-proof sheet member 6b extending along the longitudinal direction L and containing a plurality of leak-proof elastic members 6a arranged at intervals in the width direction W. The outer end of each leak-proof wall 6 in the width direction W is bonded to at least one of the top sheet 7, the absorbent body 8, and the back sheet 9 with an adhesive or the like to form a fixed end, and the inner end in the width direction W is separated from the other sheets including the top sheet 7 to form a free end. The plurality of leak-proof elastic members 6a are bonded to the vicinity of the free end of the leak-proof sheet member 6b with an adhesive. The leak-proof sheet member 6b may be, for example, a hydrophobic sheet member, and the hydrophobic sheet member may be a nonwoven fabric containing hydrophobic fibers. The type and material of the nonwoven fabric may be, for example, the same as those of the inner sheet members 31 and 21 described above. The plurality of leak-proof elastic members 6a are exemplified by rubber threads, and the types and materials of the elastic members are as described above. The properties of the elastic members, such as the cross-sectional size (wire diameter, etc.) and the elongation ratio, are appropriately selected according to the function of the leak-proof walls 6. Note that each of the leak-proof walls 6 may have its inner end in the width direction W folded back toward the outside in the width direction W.

[0071] A pair of leg gathers 5 are joined to both ends of the width direction W of the main body central part 10. Each leg gather 5 extends along the longitudinal direction L and includes a plurality of leg elastic members 5a arranged at intervals in the width direction W, and skin-side and non-skin-side leg sheet members 5b that sandwich the plurality of leg elastic members 5a. The inner end of each leg gather 5 in the width direction W is joined to the non-skin-side surface at the end in the width direction W of the main body central part 10 with an adhesive or the like to form a fixed end, and the outer end in the width direction W is separated from the main body central part 10 to form a free end. The plurality of leg elastic members 5a are joined to the skin-side and non-skin-side leg sheet members 5b with an adhesive near the free ends. The plurality of leg elastic members 5a stretch each leg gather 5. The leg sheet members 5b may be, for example, hydrophobic sheet members, and examples of the hydrophobic sheet members include nonwoven fabrics containing hydrophobic fibers. The type and material of the nonwoven fabric are as described above. The leg elastic members 5a are exemplified by rubber threads, and the type and material of the elastic members are as described above. The properties of the elastic members, such as the cross-sectional size (linear, etc.) and the elongation ratio of the elastic members, are appropriately selected according to the magnitude of the tightening force corresponding to the position in the leg gathers 5.

[0072] In the disposable diaper 1, the pair of leg gathers 5 are bridged by an exterior sheet member 14. Both end portions in the width direction W of the exterior sheet member 14 are laminated on the inner end portions in the width direction W of each of the pair of leg gathers 5 and joined with an adhesive or the like, thereby supporting and protecting the pair of leg gathers 5 from the non-skin side.

[0073] The back side portion 2 may include a back side extension portion extending inward from the inner edge in the longitudinal direction L in the back side main body portion that occupies substantially the same range as the back side joint portion 2a in the longitudinal direction L. The back side extension portion is an inner region in the longitudinal direction L of the back side portion 2. The portions of the back side extension portion that do not overlap with the absorbent main body 4, i.e., the portions on both sides in the width direction W, function as a pair of buttocks covering portions 40. The buttocks covering portions 40 protect the buttocks of the wearer from the outside. The buttocks covering portions 40 include buttocks elastic members 41 that deform the buttocks covering portions 40 to fit the buttocks of the wearer.

[0074] Next, the openings in this embodiment will be described. At least one of the ventral part 3 and the dorsal part 2 has the openings OH. In this embodiment, the openings OH are provided in the dorsal part 2. The number, shape, size, position, and arrangement of the openings OH are not particularly limited and are appropriately selected according to the performance required for discharging sweat and moisture. The number of openings OH depends on the size of the openings OH, but may be, for example, 1 to 20, and preferably 4 to 10. The shape of the openings OH is not particularly limited, and may be, for example, a circle, an ellipse, a polygon, a diamond, a heart, a star, a flower, an animal, a pinhole, a slit, etc. The size of the openings OH, when defined by the diameter of the smallest circle surrounding the openings OH, may be, for example, a diameter of 1 to 40 mm, a diameter of 5 to 35 mm is preferable, and a diameter of 10 to 30 mm is more preferable. The positions of the holes OH include, for example, positions that do not overlap with the absorbent main body 4, positions that are symmetrical with respect to the longitudinal center line CL, etc. The arrangement of the holes OH varies depending on the number and size of the holes OH, and includes, for example, a row shape along the longitudinal direction L or the width direction W, a matrix shape, a staggered shape, a checkerboard shape, and tilted arrangements thereof along the longitudinal direction L and the width direction W.

[0075] In this embodiment, the number of holes OH in the back portion 2 is four, the shape of the holes OH is circular, and the size of the holes OH is 25 mm in diameter. The positions of the holes OH are on the outside of the end portion in the longitudinal direction L of the absorbent main body 4 in the back portion 2, and are symmetrical with respect to the longitudinal center line CL (two on the right side and two on the left side), and the arrangement of the holes OH is in a row along the width direction W.

[0076] In this embodiment, as described above, the opening OH is provided in the back part 2. In this case, the opening OH is an opening penetrating the inner sheet member 21 and the outer sheet member 22 of the back part 2. The back part 2 may have a back cover sheet member 42, in which case the back cover sheet member 42 may cover part or all of the opening OH. In addition, when the opening OH is provided in the ventral part 3, the opening OH is an opening penetrating the inner sheet member 31 and the outer sheet member 32 of the ventral part 3. The ventral part 3 may have a ventral cover sheet member 43, in which case the ventral cover sheet member 43 may cover part or all of the opening OH. Even in this case, since only one cover sheet member is used for covering, sweat and moisture can pass through more easily than when two sheets, an inner sheet member and an outer sheet member, are used for covering. Furthermore, it is also possible to reduce the basis weight of the cover sheet member.

[0077] In this embodiment, as described above, the opening OH is provided in the back portion 2. In this case, the waist elastic member 12 is not arranged in the opening OH or in the opening OH and its surrounding area. This is to prevent the opening OH from shrinking and narrowing due to the shrinkage of the waist elastic member 12. However, even if the opening OH is provided in the back portion 2, the waist elastic member 12 may be arranged in the opening OH or in the opening OH and its surrounding area. In this case, when the disposable diaper 1 is used, the waist elastic member 12 is stretched, so that breathability at the opening OH can be ensured, and the waist elastic member 12 can improve the fit.

[0078] When the openings OH are provided in the abdominal portion 3, the multiple waist elastic members 13 may not be arranged at the openings or at the openings and their surrounding areas. This is to prevent the openings from shrinking and becoming narrower due to the contraction of the waist elastic members. Alternatively, when the multiple waist elastic members 13 are provided in the abdominal portion 3, the multiple waist elastic members 13 may be arranged at the openings or at the openings and their surrounding areas. This is because when the disposable diaper 1 is used, the waist elastic members 13 are stretched, so that breathability at the openings can be ensured, and the waist elastic members 13 improve the fit.

[0079] However, the area where the waist elastic members 12 are not arranged can be called a non-stretch area OHA, and the area where the waist elastic members 12 are arranged can be called a stretch area. Similarly, the area where the waist elastic members 13 are not arranged can be called a non-stretch area, and the area where the waist elastic members 13 are arranged can be called a stretch area. Note that the area where no elastic members are arranged is an area where the distance between adjacent waist elastic members is more than twice the distance in other areas, and therefore the stretch is smaller than in other areas. Therefore, in this embodiment, the multiple openings OH are located in the non-stretch area OHA in the back side portion 2.

[0080] Next, the application of the moisturizer SC in this embodiment will be described. At least one of the ventral part 3 and the back part 2 has the moisturizer SC applied to at least a part of the skin contact surface in the portion other than the opening OH (the moisturizer SC is omitted in FIG. 1). Here, the skin contact surface to which the moisturizer SC is applied is the surface of at least one of the ventral part 3 and the back part 2 that comes into contact with the skin when worn.

[0081] In this embodiment, examples of the sheet members constituting the skin contact surface (skin side surface) of at least one of the ventral part 3 and the back part 2 include the inner sheet member 21 and the back cover sheet member 42 of the back part 2, and the inner sheet member 31 and the ventral cover sheet member 43 of the ventral part 3. The sheet members are separate from the ventral part 3 and the back part 2, but may further include, for example, the top sheet 7 of the absorbent main body 4, the leg sheet member 5b, and the leak-proof sheet member 6b. Therefore, the sheet member constituting the skin contact surface is at least one of the above-mentioned sheet members given as examples, and the skin contact surface is the surface of the above-mentioned sheet member that contacts the skin side. Each of these sheet members contains hydrophobic fibers in the surface portion of the skin contact surface, and further, a moisturizing agent SC is arranged (applied) on the surface portion of the skin contact surface.

[0082] However, the area where the moisturizer SC is applied on the sheet member, i.e., the application area, does not need to be the entire surface of the skin contact surface of the sheet member. The application area is, for example, at least 20% or more of the area of ​​the skin contact surface of the sheet member, preferably 40% or more, more preferably 60% or more, and even more preferably 80% or more. The sheet member to which the moisturizer SC is applied does not need to be one piece, and may be applied to multiple sheet members. The moisturizer SC may be applied continuously or intermittently to each sheet member. Examples of intermittent include stripes, checkerboard patterns, and lattices. The moisturizer SC may be applied independently to multiple locations on each sheet member.

[0083] The moisturizer SC is not particularly limited as long as it has a moisturizing effect, and is preferably colorless and transparent. In this embodiment, a hydrophilic moisturizer is described as an example, but a hydrophobic (oily) moisturizer may also be used. The hydrophilic moisturizer preferably contains a moisturizing component and water, and the main component of the hydrophilic moisturizing component is preferably glycerin, hyaluronic acid, urea, heparin-like substances, etc., which are components that can absorb moisture in the air and moisturize the skin, and glycerin, which is a hygroscopic moisturizer, is particularly preferred. Examples of oily moisturizers include ceramide and petrolatum, which suppress moisture evaporation from the skin. As an auxiliary for the moisturizing component, for example, a polyhydric alcohol having moisturizing properties and antibacterial action (antiseptic action) may further be included. Examples of polyhydric alcohols include butylene glycol, propylene glycol, dipropylene glycol, and propanediol. Furthermore, as an additive for the moisturizing component, for example, an agent having a pharmacological action such as an anti-inflammatory action or a detoxifying action may further be included. An auxiliary having an antibacterial (antiseptic) effect may also be called an antiseptic (antibacterial) auxiliary. In this embodiment, the moisturizing agent contains, for example, glycerin, water, and an auxiliary.

[0084] In the hydrophilic moisturizing agent, the ratio of each component is not particularly limited as long as the moisturizing effect is obtained. For example, the ratio of each component described above, under conditions of an air temperature of 20°C and a relative humidity of 60% RH, can be 40 to 80% by mass for the main moisturizing component, and 60 to 20% by mass for water, auxiliary agents, and additives other than the main component.

[0085] The present disposable diaper 1 has openings OH in at least one of the ventral portion 3 and the rear portion 2. Therefore, sweat and moisture can be discharged through the openings OH, thereby reducing stuffiness inside the disposable diaper 1. At the same time, since a moisturizer SC is applied to at least a part of the skin-contacting surface of at least one of the ventral portion 3 and the rear portion 2 other than the openings OH, the moisture of the skin can be supplemented, thereby reducing dryness of the skin due to the discharge of sweat and moisture. In this way, by using the openings OH and the moisturizer SC in combination in the present disposable diaper 1, it is possible to reduce both stuffiness and dryness, thereby suppressing skin troubles and improving comfort.

[0086] The method for determining whether a moisturizing agent is hydrophilic or hydrophobic and the method for determining the component ratio are as follows. <Method of measuring hydrophilicity / hydrophobicity of moisturizers and method of measuring component ratio> (1) A portion of the nonwoven fabric to which a moisturizer has been applied is cut out to a specified size (e.g., 5 cm x 5 cm). (2) The cut nonwoven fabric is immersed in a beaker containing a predetermined amount of water (e.g., 500 ml) to dissolve the moisturizer in the water. (3) The water used for extraction is evaporated under reduced pressure (evaporator) under heating to concentrate the moisturizing agent components. If there are no extracted components (nothing precipitates) after the water has evaporated, the moisturizing agent is hydrophobic. (4) If the moisturizer is hydrophilic (if the components have been extracted), leave the water in which the moisturizer has been dissolved in a beaker at a temperature of 20°C and a relative humidity of 60% for four weeks. (5) After aging, the sample is analyzed using a liquid chromatography-mass spectrometry (LC-MS) to analyze the water in which the moisturizer has been dissolved and measure the mass of each component. (6) Calculate the ratio of each component (excluding moisture) from the obtained components and their masses. When it is desired to measure the moisture ratio as well, the following measurement is carried out in addition to the above (1) to (5). (7) Separately, carry out steps (1) and (2) above, and leave the water with the moisturizer dissolved in it in a beaker for a while at an air temperature of 20°C and a relative humidity of 60%RH. The water evaporates, and a mixture (moisturizer containing water) is produced that contains the amount of water that it can contain under conditions of an air temperature of 20°C and a relative humidity of 60%RH. The mass of the mixture is measured together with the beaker. (8) Then, place the beaker containing the mixture in a dryer to evaporate the water from the mixture, and measure the mass of the beaker again, thereby determining the mass of the water. (9) Calculate the ratio of each component (including moisture) from the mass of each component obtained in (3) above and the mass of moisture obtained in (8) above. (10) If the moisturizer is confirmed to be hydrophobic in (3) above, the extractions in (1) and (2) above are replaced with an organic solvent of your choice, and various measurements are carried out according to (5) to (9).

[0087] There is no particular restriction on the basis weight of the moisturizer as long as it can exert a skin care effect. 2 More than 3.9g / m 2 It is preferable that the moisturizing agent is less than the lower limit (0.3 g / m 2 ) or more, the moisturizer's effect can be fully obtained. 2 ) or less, it is possible to prevent the moisturizer from becoming sticky when worn and also to prevent the moisturizer from getting caught on the legs, making it difficult to put on the disposable diaper 1. Therefore, it is possible to achieve both skin care effects and ease of putting on with an optimal amount of moisturizer.

[0088] The method for measuring the basis weight of the moisturizing agent is as follows. <Method for measuring the basis weight of moisturizing agent> (1) A portion of the nonwoven fabric of a disposable diaper to which a moisturizer has been applied is cut to a specified size (e.g., 5 cm x 5 cm) and the mass is measured. (2) The cut nonwoven fabric is immersed in a beaker containing a predetermined amount of water (e.g., 500 ml). (3) The nonwoven fabric is immersed in water and is repeatedly poked and stirred with a glass rod for at least 5 minutes, and then left to stand in the water for 60 minutes. (4) After that, thoroughly squeeze out the water from the nonwoven fabric, dry it in an oven at or above 50 degrees for 24 hours, and measure the mass. (5) The mass of the moisturizer applied to the nonwoven fabric is calculated from the difference between the mass of the nonwoven fabric after drying and the mass of the nonwoven fabric before immersion in water. The mass of the moisturizer is divided by the area of ​​the nonwoven fabric to obtain the basis weight of the moisturizer. (6) If the moisturizing agent is hydrophobic, the nonwoven fabric cut out in (2) is immersed in a beaker using a predetermined amount of any organic solvent, and then (3) to (5) are carried out in the same manner.

[0089] The moisturizer SC may be applied to the entire skin-contacting surface of at least one of the ventral portion 3 and the back portion 2, and to the entire skin-contacting surface of the absorbent main body 4 overlapping in the thickness direction T with at least one of the ventral portion 3 and the back portion 2. In other words, the moisturizer SC may be applied to the entire skin-contacting surfaces of the ventral portion 3 and the back portion 2 that do not overlap with the absorbent main body 4 in the thickness direction T, and to the entire skin-contacting surfaces of the absorbent main body 4 that overlap with the ventral portion 3 and the back portion 2 in the thickness direction T. When a ventral cover sheet member 43 or a back cover sheet member 42 is used, the moisturizer SC may be applied to the skin-contacting surface thereof.

[0090] Alternatively, the moisturizer SC may be applied in a predetermined pattern to the abdominal portion 3, the dorsal portion 2 and parts of the skin contact surface of the absorbent body 4, as exemplified in Figures 4 to 6. Figures 4 to 6 are plan views in a developed state showing examples of application of the moisturizer SC (examples of predetermined patterns) in the disposable diaper 1 according to the first embodiment in Figure 1. Figures 4 to 6 show the disposable diaper 1 in Figure 1 in a schematic manner.

[0091] In the application example of Fig. 4, the moisturizer SC is applied to the skin-contacting surfaces of the areas excluding the outer and inner ends in the longitudinal direction L of the ventral part 3 and the back part 2, and to the skin-contacting surfaces of the absorbent main body 4 in areas overlapping with the ventral part 3 and the back part 2 in the thickness direction T. Not applying the moisturizer SC to the outer ends in the longitudinal direction L of the ventral part 3 and the back part 2 makes it difficult for clothing fibers to adhere to the outer ends, and not applying the moisturizer SC to the inner ends makes it difficult for floor dust to adhere to the inner ends.

[0092] The application example in Fig. 5 is the same as the application example in Fig. 4, except that the moisturizer SC in the non-stretchable area OHA (when a back cover sheet member 42 is used, the area overlapping with the non-stretchable area OHA in the thickness direction T of the back cover sheet member 42) in the back part 2. By not applying the moisturizer SC to the non-stretchable area OHA (or the back cover sheet member 42 overlapping with said area), it is possible to make it difficult for the moisturizer SC to diffuse to the non-skin side through the openings OH.

[0093] 6 is an example of the application in Fig. 5, except that the moisturizer SC in the back portion 2 is further removed from the region of the absorbent main body 4 that overlaps with the back portion 2 in the thickness direction T. By not applying the moisturizer SC to the absorbent main body 4, the effect of the moisturizer SC on the absorption performance of the absorbent main body 4 can be suppressed.

[0094] 4 to 6, the pattern of the moisturizer SC on the dorsal portion 2 may be applied to the ventral portion 3, or the pattern of the moisturizer SC on the ventral portion 3 may be applied to the dorsal portion 2. In addition, in Figs. 4 to 6, the moisturizer SC may be applied to only one of the ventral portion 3 and the dorsal portion 2.

[0095] In the present disposable diaper 1, a hydrophilic moisturizer SC may be applied to the hydrophobic surface portions of the sheet members (for example, the inner sheet member 21, the dorsal cover sheet member 42, the inner sheet member 31, the ventral cover sheet member 43, the top sheet 7, the leg sheet member 5b and the leakproof sheet member 6b). In this case, after application, the moisturizer SC is not absorbed by the sheet members and is likely to remain on the surface portions. As a result, the moisturizer SC remains on the surface portions of the sheet members even during use, so that the effect of the moisturizer SC on the skin can be fully obtained.

[0096] In a preferred embodiment of the disposable diaper 1, the moisturizer SC is applied to a portion other than the hole OH in at least one of the ventral portion 3 and the back portion 2, which is adjacent to the hole OH (hereinafter, the hole end OHE) or overlaps with the hole end OHE in the thickness direction T. In this embodiment, for example, as shown in Fig. 4, the moisturizer SC is applied to a portion other than the hole OH in the back portion 2, which is the hole end OHE or the back cover sheet 42 having the hole end OHE or the portion overlapping with the hole end OHE in the thickness direction T.

[0097] Here, at the opening end OHE in at least one of the ventral portion 3 and the dorsal portion 2, there is a risk of skin trouble such as chafing caused by rubbing between the wearer's skin and the opening end OHE due to unintended protrusions such as burrs or steps (rigidity difference) on the edge of the opening portion OH. Therefore, in the present disposable diaper 1, as described above, by applying a moisturizing agent SC to the opening end OHE or the portion overlapping the opening end OHE in the thickness direction T where chafing may occur, it is possible to suppress chafing and further suppress skin trouble.

[0098] Furthermore, by having the moisturizer SC in the portion adjacent to the hole OH (hole end OHE), the skin, which is prone to drying due to the discharge of sweat from the hole OH, can be immediately moisturized, thereby further suppressing skin troubles. However, it is preferable that the moisturizer SC is not present on the edge of the hole end OHE (the boundary with the hole OH) from the viewpoint of suppressing the moisturizer SC from overflowing from the hole OH and adhering to clothes, etc. The region overlapping the hole end OHE in the thickness direction T is, for example, the hole end OHE itself when no other sheet is overlapping the hole OH, and the region overlapping the hole end OHE of the other sheet in the thickness direction T when another sheet is overlapping the hole OH.

[0099] In a preferred embodiment of the disposable diaper 1, in at least one of the abdominal portion 3 and the back portion 2, the opening OH is located in a non-stretchable area OHA other than the stretchable area, not in a stretchable area having a stretchable member stretching in the width direction W. In this embodiment, for example, as shown in FIG. 4, in the back portion 2, the opening OH is located in a non-stretchable area OHA where the waist elastic member 12 is not present. Therefore, in the opening OH, the opening can be prevented from being blocked by the waist elastic member 12. Therefore, the breathability of the opening OH can be more stably ensured. As a result, the stuffiness inside the disposable diaper 1 can be further reduced, and skin trouble can be further suppressed. Furthermore, since the shape of the opening OH can be maintained, the visibility is improved, so that the breathability can be realized from the outside.

[0100] In another embodiment of the present disposable diaper 1, at least one of the abdominal portion 3 and the back portion 2 may have the openings OH located in an elastic region having an elastic member (e.g., waist circumference elastic members 13, 12) that stretches in the width direction W (not shown). In this case, when the disposable diaper 1 is worn, the openings of the openings OH are also stretched as the abdominal portion 3 and the back portion 2 are stretched in the width direction W, so that the opening area of ​​the openings OH becomes larger. Therefore, the elastic member improves the fit, while the breathability of the openings OH can be more stably ensured. This makes it possible to further reduce stuffiness inside the disposable diaper 1 and further suppress skin troubles.

[0101] In another embodiment of the disposable diaper 1, the opening OH may have a slit-like opening extending in the longitudinal direction L. In this case, when the disposable diaper 1 is worn, the ventral part 3 and the dorsal part 2 are expanded in the width direction W, so that the slit-like opening opens and the opening area of ​​the opening OH becomes larger. This makes it possible to more stably ensure the breathability of the opening OH. This makes it possible to further reduce stuffiness inside the disposable diaper 1 and to further prevent skin troubles.

[0102] In a preferred embodiment of the present disposable diaper 1, a plurality of openings OH are present. The plurality of openings OH are arranged at intervals along at least one of the width direction W and the longitudinal direction L in at least one of the ventral portion 3 and the rear portion 2. In the present embodiment, for example, as shown in FIG. 4, four openings OH are arranged at intervals along the width direction W in the rear portion 2. This ensures breathability. This can further reduce stuffiness inside the disposable diaper 1 and further suppress skin troubles.

[0103] In a preferred embodiment of the present disposable diaper 1, the openings OH are located outside the edge of the absorbent body 8 in the longitudinal direction L or width direction W in at least one of the abdominal portion 3 and the dorsal portion 2. That is, the openings OH are located outside the longitudinal direction L of the edge of the absorbent body 8 in the longitudinal direction L, the openings OH are located outside the width direction W of the edge of the absorbent body 8 in the width direction W, or both. Therefore, the openings OH are located at a position where they do not overlap with the absorbent body 8 in the thickness direction T. In this embodiment, for example, as shown in Figs. 1 and 4 to 6, the openings OH are located at a position where they do not overlap with the absorbent body 8 in the thickness direction T. As a result, the openings OH are not blocked by the absorbent body 8, so that the breathability of the openings OH can be more stably ensured. As a result, it is possible to further reduce stuffiness in the disposable diaper 1 and further suppress skin troubles.

[0104] In a preferred embodiment of the disposable diaper 1, at least one of the ventral part 3 and the rear part 2 further includes a cover sheet (ventral cover sheet 43, rear cover sheet 42) arranged to cover the opening OH. In this embodiment, as shown in Figs. 1, 4 to 6, the rear part 2 includes a rear cover sheet 42 arranged to cover the opening OH. This can further reduce the possibility of urine leakage, in which excrement (e.g., urine) leaks from the opening OH. This can further reduce the possibility of urine leakage, while reducing stuffiness in the disposable diaper 1, and can suppress skin trouble. Even if the opening OH is covered with a cover sheet (ventral cover sheet 43, rear cover sheet 42), the opening OH is only covered with one cover sheet, compared to the other parts of the opening OH. Therefore, the air permeability is higher than the other parts of the opening OH, and the ventilation function can be exhibited, allowing sweat and moisture to be discharged from the opening OH.

[0105] In a preferred embodiment of the present disposable diaper 1, the cover sheet is disposed on the skin-facing surface of at least one of the ventral portion 3 and the rear portion 2, and the moisturizer SC is applied to the skin-contacting surface of the cover sheet. In this embodiment, as shown in Figs. 1 and 4 to 6, the moisturizer SC is applied to the skin-contacting surfaces of the ventral cover sheet 43 and the rear cover sheet 42. This allows the area of ​​the region to which the moisturizer SC is applied to be increased, thereby further enhancing the effect of the moisturizer SC, such as supplementing the moisture of the skin. This makes it possible to further suppress skin troubles.

[0106] In a preferred embodiment of the disposable diaper 1, the cover sheet is made of a hydrophobic nonwoven fabric, and the moisturizer SC is made of a hydrophilic agent. In this embodiment, the ventral cover sheet 43 and / or the rear cover sheet 42 are made of a hydrophobic nonwoven fabric, and the moisturizer SC is a hydrophilic agent. Therefore, the moisturizer SC is less likely to permeate into the cover sheet (the ventral cover sheet 43, the rear cover sheet 42). This makes it easier for the moisturizer SC to remain on the skin-contacting surface of the cover sheet. In addition, since the cover sheet is made of a hydrophobic nonwoven fabric, urine is less likely to permeate into the cover sheet. This makes it possible to significantly reduce the possibility of urine leakage from the openings OH. This makes it possible to significantly reduce the possibility of urine leakage while reducing stuffiness inside the disposable diaper 1, thereby suppressing skin troubles.

[0107] In a preferred embodiment of the present disposable diaper 1, the openings OH are disposed in the back part 2 which covers the back part where sweating is more likely to occur, thereby making it possible to further reduce stuffiness inside the disposable diaper 1 and thus to further prevent skin troubles.

[0108] In a preferred embodiment of the present disposable diaper 1, the moisturizer SC is applied continuously or intermittently from one end to the other end in the width direction W of at least one of the ventral portion 3 and the back portion 2. In the present embodiment, for example, as shown in Figs. 4 to 6, the moisturizer SC is applied continuously from one end to the other end in the width direction W of the ventral portion 3 and the back portion 2. This reduces friction with at least one of the ventral portion 3 and the back portion 2 over a wide region of the wearer's waist. Furthermore, the area where the moisturizer SC applied to at least one of the ventral portion 3 and the back portion 2 is transferred to the skin can be widened, so that the area where the skin can be protected by the moisturizer SC can be widened. As a result, it is possible to further suppress skin troubles caused by skin chafing.

[0109] In a preferred embodiment of the present disposable diaper 1, the moisturizing agent SC is applied to at least one of the ends in the longitudinal direction L and the width direction W of the absorbent 8 so as to overlap the end in the thickness direction T. In this embodiment, for example, on the side of the abdominal portion 3 in Figs. 4 to 6 and on the side of the back portion 2 in Figs. 4 and 5, the moisturizing agent SC is applied to the ends in the longitudinal direction L and the width direction W of the absorbent 8 so as to overlap in the thickness direction T. Here, in the longitudinal direction L and / or the width direction W, the ends of the absorbent 8 have high rigidity, and the portions outside the ends of the absorbent 8 have low rigidity. Due to this difference in rigidity, the ends of the absorbent 8 are likely to rub against the skin around the waist. Therefore, in the present disposable diaper 1, by applying the moisturizing agent to the ends in the longitudinal direction L and / or the width direction W of the absorbent 8, which have high rigidity, the rub between the ends of the absorbent 8 and the skin around the waist of the wearer can be reduced, and skin troubles due to skin rubbing can be suppressed.

[0110] In a preferred embodiment of the present disposable diaper 1, the moisturizer SC is not applied to at least one of the outer end and inner end in the longitudinal direction L of at least one of the abdominal part 3 and the back part 2. Here, when clothes or the floor surface come into contact with the moisturizer, the fibers of the clothes or the dust on the floor surface are adsorbed by the moisturizer SC, and the adsorbed fibers and dust may accumulate in the moisturizer SC and have a negative effect on the skin. In addition, the adsorbed fibers and dust may look like garbage, which may cause the disposable diaper 1 to look unsanitary. Therefore, in the present disposable diaper 1, the moisturizer is not applied to at least one of the outer end and inner end in the longitudinal direction L of at least one of the abdominal part 3 and the back part 2. In this embodiment, for example, the moisturizer SC is not applied to the outer end and inner end in the longitudinal direction L of the abdominal part 3 and the back part 2 in Figs. 4 to 6. This prevents fibers from clothing or dust from the floor from being adsorbed to the outer and inner ends in the longitudinal direction L of the ventral portion 3 and the dorsal portion 2, which are likely to come into contact with the wearer's clothing or the floor. This prevents the adsorbed fibers from adversely affecting the skin and the disposable diaper 1 from appearing unsanitary.

[0111] In a preferred embodiment of the disposable diaper 1, the disposable diaper 1 is pants-type and further includes side seal parts (joint parts between the ventral joint part 3a and the dorsal joint part 2a) joining both ends in the width direction W of the ventral part 3 and both ends in the width direction W of the dorsal part 2, and the moisturizing agent SC is applied to the inner end part in the width direction W of the side seal parts. In the case of this embodiment, for example, in the ventral part 3 and the dorsal part 2 in Figs. 4 to 6, the moisturizing agent SC is applied to the inner end part in the width direction W of the side seal parts (joint parts between the ventral joint part 3a and the dorsal joint part 2a). Here, the side seal parts joining the ventral part 3 and the dorsal part 2 are joined by fusion such as heat sealing or sonic sealing, and have hardened parts, which may damage the skin if they come into contact with the skin. Therefore, in the present disposable diaper 1, the moisturizer SC is also applied to the hardened portion that may come into contact with the skin, i.e., the inner end of the side seal portion in the width direction W. This reduces friction between the skin and the hardened portion of the side seal portion. Furthermore, the moisturizer SC on the surface of the side seal portion is transferred to the skin, protecting the skin and preventing evaporation of moisture from the skin, thereby maintaining the moisture of the skin. Furthermore, since the moisture of the skin can be maintained, it is possible to make it difficult for abrasions to occur even if friction occurs. As a result, skin troubles caused by skin chafing can be suppressed.

[0112] In a preferred embodiment of the disposable diaper 1, at least one of the abdominal portion 3 and the dorsal portion 2 is stretchable in the width direction W and has a plurality of stretchable members (e.g., waist elastic members 13, 12) extending in the width direction W and spaced apart in the longitudinal direction L. The opening OH is located between a first stretchable member and a second stretchable member that are adjacent in the longitudinal direction among the plurality of stretchable members. The first stretchable member is located further outboard in the longitudinal direction L than the second stretchable member. The distance between the inner edge of the opening OH in the longitudinal direction L and the second stretchable member is longer than the distance between the outer edge of the opening OH in the longitudinal direction L and the first stretchable member.

[0113] Specifically described. FIG. 7 is a schematic diagram showing the relationship between the opening OH and the body circumferential elastic member 12 in FIG. 1. In the present embodiment, in the dorsal part 2, the opening OH is located between a first body circumferential elastic member 12a and a second body circumferential elastic member 12b that are adjacent to each other in the longitudinal direction L among a plurality of expansion and contraction members, that is, a plurality of body circumferential elastic members 12. The first body circumferential elastic member 12a is located outside the second body circumferential elastic member 12b in the longitudinal direction L. The distance d2 between the inner edge p2 of the opening OH in the longitudinal direction L and the second body circumferential elastic member 12b is longer than the distance d1 between the outer edge p1 of the opening OH in the longitudinal direction L and the first body circumferential elastic member 12a (d1 < d2).

[0114] Thus, in the disposable diaper 1, the opening OH is located between the first body circumferential elastic member 12a and the second body circumferential elastic member 12b that are adjacent to each other in the longitudinal direction L, and the second body circumferential elastic member 12b is located farther than the first body circumferential elastic member 12a (d1 < d2). That is, the inner part (p2) of the opening OH in the longitudinal direction L is farther from the body circumferential elastic member 12 than the outer part (p1). Therefore, the inner part (p2) of the opening OH in the longitudinal direction L is less likely to expand and contract in the width direction W than the outer part (p1), and the state where the width of the opening OH is wide is easily maintained. Thereby, in the side (the inner side in the longitudinal direction L) of the absorbent body 8 that is prone to stuffiness in the dorsal part 2, since the width of the opening OH is wide, the air permeability at the opening OH can be more stably ensured. Thereby, the stuffiness inside the disposable diaper 1 can be further reduced, and it becomes possible to further suppress skin troubles.

[0115] In another embodiment of the disposable diaper 1, at least one of the abdominal portion 3 and the back portion 2 is stretchable in the width direction W and has a plurality of elastic members (e.g., waist elastic members 13, 12) extending in the width direction W and spaced apart in the longitudinal direction L. The opening OH is located between a first elastic member and a second elastic member adjacent in the longitudinal direction among the plurality of elastic members. The first elastic member is located further outboard in the longitudinal direction L than the second elastic member. The distance between the outer edge of the opening OH in the longitudinal direction L and the first elastic member is longer than the distance between the inner edge of the opening OH in the longitudinal direction L and the second elastic member.

[0116] 7, in another embodiment, in the back portion 2, the distance d1 between the outer edge p1 of the opening OH in the longitudinal direction L and the first waistline elastic member 12a is longer than the distance d2 between the inner edge p2 of the opening OH in the longitudinal direction L and the second waistline elastic member 12b (d1>d2).

[0117] In this case, in the present disposable diaper 1, the opening OH is located between the first waist elastic member 12a and the second waist elastic member 12b adjacent to each other in the longitudinal direction L, and the second waist elastic member 12b is closer to the opening OH than the first waist elastic member 12a (d1>d2). That is, the inner part (p2) of the opening OH in the longitudinal direction L is closer to the waist elastic member 12 than the outer part (p1). Therefore, the inner part (p2) of the opening OH in the longitudinal direction L is more likely to expand and contract in the width direction W than the outer part (p1), and the opening OH is more likely to become narrow. As a result, the opening OH is narrow on the absorber 8 side (inner side in the longitudinal direction L) of the back side portion 2, so that the possibility of urine leakage from the opening OH can be significantly reduced. As a result, it is possible to suppress skin trouble while significantly reducing the possibility of urine leakage.

[0118] The hydrophilicity of the sheet member (sheet) is evaluated by the following method. <Method for evaluating hydrophilicity of sheet member> (1) A sheet material used in disposable diapers is cut to a predetermined size (for example, 50 mm x 50 mm) and placed on an acrylic plate. (2) Drop 0.05 mL of colored water onto the cut-out sheet member from 30 mm above. After 10 minutes, measure the diffusion area of ​​the colored water using an image analyzer. The larger the measured value, the more hydrophilic the material is determined to be.

[0119] Second embodiment Next, a second embodiment will be described. A disposable diaper 51 of this embodiment is a tape type. Figs. 8 and 9 are diagrams showing a disposable diaper 51 according to this embodiment. Fig. 8 is a plan view showing an example of the configuration of the disposable diaper 51 in an unfolded state. Fig. 9 is a cross-sectional view taken along the widthwise center line CW in Fig. 8. In this embodiment, differences from the first embodiment will mainly be described.

[0120] The disposable diaper 51 includes a ventral portion 53, a dorsal portion 52, and an absorbent body 54. The ventral portion 53 and the dorsal portion 52 are portions of the disposable diaper 51 that cover the wearer's abdomen and back, respectively. In this embodiment, when the disposable diaper 51 is divided into thirds in the longitudinal direction L, the ventral portion is defined as the ventral portion 53, the dorsal portion is defined as the dorsal portion 52, and the central portion is defined as the central portion 50. The absorbent body 54 is a portion of the disposable diaper 51 that covers the wearer's crotch, and includes an absorbent body 58. At least the front and rear ends of the absorbent body 54 in the longitudinal direction L extend to the central portions in the width direction W of the ventral portion 53 and the dorsal portion 52, respectively.

[0121] In this embodiment, the front and rear ends of the absorbent main body 54 are connected to the central portions in the width direction W of the ventral portion 53 and the back portion 52, respectively, by, for example, an adhesive (e.g., hot melt adhesive, the same applies below). At this time, the front and rear ends of the absorbent main body 54 reach the outer ends in the longitudinal direction L of the ventral portion 53 and the back portion 52, respectively, but may reach approximately the central portion in the longitudinal direction L.

[0122] The disposable diaper 51 includes an exterior sheet member 60 located on the non-skin side of the absorbent body 54, and a pair of side sheet members 70 arranged at both ends in the width direction W on the skin side of the absorbent body 54 and extending in the longitudinal direction L.

[0123] The exterior sheet member 60 constitutes the non-skin side of the disposable diaper 51, and holds the non-skin side of the absorbent body 54. The exterior sheet member 60 can be made of the same material as the above-mentioned exterior sheet member 14, and is made of, for example, a liquid-impermeable, breathable nonwoven fabric.

[0124] Each of the pair of side sheet members 70 can be made of the same material as the inner sheet members 21, 31 described above. For example, it is preferable that the pair of side sheet members 70 is made of a nonwoven fabric made of hydrophobic fibers, and in particular, it is preferable that the surface portion of the skin contact surface contains hydrophobic fibers. Each of the pair of side sheet members 70 has, in the inner portion in the width direction W, a fixing portion (not shown) that fixes both ends in the longitudinal direction L to the absorbent main body 54, and a leak-proof wall 56 located between the fixing portions of both ends. In the leak-proof wall 56, the outer end in the width direction W is fixed to the absorbent main body 54 to form a fixed end (not shown), and the inner end in the width direction W is not fixed to form a free end (not shown). The leak-proof wall 56 includes an elastic member 56a that extends along the longitudinal direction L at the inner end in the width direction W. The elastic member 56a is made of an elastic body such as rubber thread.

[0125] The absorbent body 54 includes a top sheet 57, a back sheet 59, and an absorbent body 58 located between the top sheet 57 and the back sheet 59, and may include grooves (not shown) that can diffuse liquid in the longitudinal direction L and the width direction W. The absorbent body 58 includes an absorbent core 58b and a core wrap 58a that contains the absorbent core 58b. The materials of the top sheet 57, the absorbent body 58 (core wrap 58a, absorbent core 58b), and the back sheet 59 are the same as those of the top sheet 7, the absorbent body 8 (core wrap 8a, absorbent core 8b), and the back sheet 9 of the first embodiment.

[0126] The disposable diaper 51 includes a pair of engaging tapes 75 extending outward on both sides in the width direction W of the back side portion 52, and a target tape 73 located in the center of the width direction W of the abdominal side portion 53 as a target region for engaging the pair of engaging tapes 75. The target tape 73 is fixed to the non-skin side surface of the exterior sheet member 60 with an adhesive. Each of the pair of engaging tapes 75 includes a plurality of hook-shaped fibrous bodies, and the target tape 73 is a fibrous structure including a plurality of loop-shaped fibrous bodies.

[0127] The disposable diaper 51 includes a plurality of elastic members 55a for leg gathers. The elastic members 55a extend along the longitudinal direction L between both end portions of the back sheet 59 in the width direction W and the exterior sheet member 60. The elastic members 55a are made of an elastic body such as rubber thread.

[0128] In this embodiment, the back side portion 52 may include a back side cover sheet member 82 arranged on the skin side surface so as to cover the back side end of the absorbent main body 54 (absorbent 58) in the longitudinal direction L from the skin side. The back side cover sheet member 82 prevents the ventral side end of the absorbent main body 54 from directly contacting the wearer's skin, thereby suppressing chafing of the skin. Similarly, the ventral side portion 53 may include a ventral side cover sheet member arranged on the skin side surface so as to cover the back side end of the absorbent main body 54 in the longitudinal direction L from the skin side. The ventral side cover sheet member prevents the ventral side end of the absorbent main body 54 from directly contacting the wearer's skin, thereby suppressing chafing of the skin. The back side cover sheet member 82 and the ventral side cover sheet member are formed of, for example, the same material as the inner sheets 31, 21 of the first embodiment.

[0129] In the disposable diaper 1, each of the pair of side sheet members 70, the pair of engaging tapes 75, the top sheet 57, the absorbent body 58, the back sheet 59, the exterior sheet member 60, and the target tape 73 is bonded to adjacent materials with an adhesive. The absorbent core 58b is bonded to the core wrap 58a with an adhesive.

[0130] In this embodiment, the ventral portion 53, the central portion 50 and the dorsal portion 52 are mainly constituted by a pair of side sheet members 70 and an exterior sheet member 60.

[0131] Next, the openings in this embodiment will be described. At least one of the ventral portion 53 and the back portion 52 has an opening OH. In this embodiment, the back portion 52 has a plurality of openings OH between a pair of engagement tapes 75. The plurality of openings OH are arranged in a non-stretchable area OHA where no elastic member is arranged. The number, shape, size, position, and arrangement of the openings OH are not particularly limited and are the same as those in the first embodiment. However, when the back cover sheet member 82 or the ventral cover sheet member is used, they may overlap with the openings OH in the thickness direction T.

[0132] Fig. 10 is a plan view showing an example of application of the moisturizer SC in the disposable diaper 51 according to the second embodiment of Fig. 8 in an unfolded state. In this embodiment, the moisturizer SC is applied (placed) at least on the skin contact surfaces 53S, 50S and 52S of the ventral portion 53, the central portion 50 and the dorsal portion 52, i.e., on the skin contact surface (including the leak-proof wall 56) of the side sheet member 70. In this embodiment, the moisturizer SC is also applied to the skin contact surface (top sheet 57 of the absorbent body 54) of the absorbent main body 54. However, when a dorsal cover sheet member 82 or a ventral cover sheet member is used, the moisturizer SC may also be applied to these skin contact surfaces. In this case, the application area of ​​the moisturizer SC is large, so that the moisturizing effect can be enhanced.

[0133] In the second embodiment, the same effects as in the first embodiment can be obtained.

[0134] The disposable diaper of the present invention is not limited to the above-described embodiment, and can be appropriately combined or modified with known techniques, etc., within the scope of the object and spirit of the present invention. [Explanation of symbols]

[0135] 1, 51 Disposable diapers (absorbent articles) 2 Dorsal part 3 Ventral part 4. Absorbent body 8. Absorber OH opening SC Moisturizer

Claims

1. An absorbent article having a longitudinal direction, a width direction and a thickness direction which are mutually orthogonal in an unfolded state, comprising an abdominal side portion covering the abdomen of a wearer, a back side portion covering the back, and an absorbent main body covering a crotch area and including an absorbent body, wherein front and rear end portions of the absorbent main body in the longitudinal direction extend to central portions of the abdominal side portion and the back side portion, respectively, in the width direction; At least one of the ventral portion and the dorsal portion is An opening; a moisturizing agent applied to at least a portion of the skin contact surface other than the hole portion; having Absorbent articles.

2. The moisturizing agent is applied to a portion other than the opening in at least one of the ventral portion and the dorsal portion, the portion being adjacent to the opening or a portion overlapping the portion adjacent to the opening in the thickness direction. The absorbent article of claim 1.

3. At least one of the ventral portion and the dorsal portion is A stretchable region having a stretchable member that stretches in the width direction; a non-elastic region other than the elastic region; having The opening is located in the non-stretchable region.

3. The absorbent article according to claim 1 or 2.

4. At least one of the ventral portion and the dorsal portion is A stretchable region having a stretchable member that stretches in the width direction; a non-elastic region other than the elastic region; having The opening is located in the stretchable region.

3. The absorbent article according to claim 1 or 2.

5. The opening portion has a slit-shaped opening extending in the longitudinal direction. The absorbent article of claim 4.

6. The opening portion is present in a plurality of portions, The plurality of openings are arranged at intervals along at least one of the width direction and the length direction in at least one of the ventral side portion and the back side portion.

3. The absorbent article according to claim 1 or 2.

7. The opening is located outside an edge of the absorbent body in at least one of the abdominal portion and the back portion in the longitudinal direction or the width direction.

3. The absorbent article according to claim 1 or 2.

8. At least one of the ventral side portion and the dorsal side portion further includes a cover sheet arranged to cover the opening portion.

3. The absorbent article according to claim 1 or 2.

9. the cover sheet is disposed on a skin-facing surface of at least one of the ventral portion and the dorsal portion, The moisturizing agent is applied to the skin contact surface of the cover sheet. The absorbent article of claim 8.

10. the cover sheet is made of a hydrophobic nonwoven fabric; The moisturizing agent is composed of a hydrophilic agent.

10. The absorbent article of claim 9.

11. The opening is located in the back portion.

3. The absorbent article according to claim 1 or 2.

12. The moisturizing agent is applied continuously or intermittently from one end to the other end in the width direction in at least one of the ventral side portion and the back side portion.

3. The absorbent article according to claim 1 or 2.

13. The moisturizing agent is applied to at least one end of the absorbent body in the longitudinal direction and the width direction so as to overlap the end in the thickness direction.

3. The absorbent article according to claim 1 or 2.

14. The moisturizing agent is not applied to at least one of the outer end and the inner end in the longitudinal direction of at least one of the ventral side portion and the dorsal side portion.

3. The absorbent article according to claim 1 or 2.

15. The absorbent article is a pants-type disposable diaper, and further includes side seal portions joined to both ends of the abdominal portion in the width direction and both ends of the back portion in the width direction, The moisturizing agent is applied to an inner end portion of the side seal portion in the width direction.

3. The absorbent article according to claim 1 or 2.

16. At least one of the ventral portion and the dorsal portion is stretchable in the width direction, and has a plurality of stretchable members extending in the width direction and spaced apart in the longitudinal direction; The opening is located between a first elastic member and a second elastic member adjacent to each other in the longitudinal direction among the plurality of elastic members, The first elastic member is located outboard of the second elastic member in the longitudinal direction, a distance between an inner edge of the opening in the longitudinal direction and the second elastic member is longer than a distance between an outer edge of the opening in the longitudinal direction and the first elastic member; 3. The absorbent article according to claim 1 or 2.

17. At least one of the ventral portion and the dorsal portion is stretchable in the width direction, and has a plurality of stretchable members extending in the width direction and spaced apart in the longitudinal direction; The opening is located between a first elastic member and a second elastic member adjacent to each other in the longitudinal direction among the plurality of elastic members, The first elastic member is located outboard of the second elastic member in the longitudinal direction, a distance between an outer edge of the opening in the longitudinal direction and the first elastic member is longer than a distance between an inner edge of the opening in the longitudinal direction and the second elastic member; 3. The absorbent article according to claim 1 or 2.

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