absorbent materials

Abstract

This invention provides an absorbent article capable of suppressing discomfort caused by absorbent pads during wear and preventing adverse conditions such as skin problems and unpleasant sensations. The absorbent article (10) comprises an absorbent core (45) disposed at least in the crotch area, and multiple waist panels (70, 75, 76) disposed in the waist area, with mutually orthogonal front-to-back (L) and width-to-width (W) directions. Each waist panel has an absorbent pad (70) that contacts the wearer's skin. The absorbent article comprises: an absorbent area (R15) with absorbent pads disposed thereon; a first area (R11) disposed at a position further outward in the front-to-back direction than the absorbent area; and a second area (R12) disposed at a position further outward in the front-to-back direction than the first area. The first area has fewer waist panels than the absorbent area. The second area has more waist panels than the first area.

Description

Technical Field

[0001] This invention relates to an absorbent article having absorbent pads. Background Technology

[0002] Patent Document 1 discloses an absorbent article with a absorbent pad. The absorbent pad is disposed in the waist area covering the wearer's waist, in contact with the wearer's skin. This absorbent pad can absorb sweat and other bodily fluids from the wearer's waist.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-118799 Summary of the Invention

[0006] However, the aforementioned absorbent materials have the following problems.

[0007] Absorbent pads are designed to come into direct contact with the skin. If an absorbent pad that has absorbed bodily fluids remains in contact with the skin, it may cause skin problems such as inflammation or discomfort for the wearer.

[0008] Furthermore, absorbent pads are made of sheets such as non-woven fabric. Therefore, the absorbency of absorbent pads is less than that of absorbent cores containing absorbent materials such as pulp. Consequently, if bodily fluids exceed the absorbency of the pad and are expelled, the continuous contact between the fluids and the skin, or the skin becoming damp, may cause skin inflammation or discomfort for the wearer. Additionally, to increase the absorbency of absorbent pads, the area weight per unit area of ​​the fibers constituting the pad is considered. However, increasing the area weight per unit area of ​​the fibers makes the pad thicker, which can easily lead to discomfort when wearing it.

[0009] The present invention was made in view of the following problems, and provides an absorbent article that can suppress discomfort caused by absorbent pads during wear and suppress adverse conditions such as skin problems and unpleasant feelings.

[0010] An absorbent article comprises: mutually orthogonal front-back and width directions; a crotch area; a waist area disposed on the outer side of the crotch area in the front-back direction, covering the wearer's waist; an absorbent core disposed at least in the crotch area; and a plurality of waist panels disposed in the waist area. The waist panels have absorbent sheets that come into contact with the wearer's skin. The absorbent article comprises: an absorbent area disposed of the absorbent sheets; a first area disposed on the outer side of the absorbent area in the front-back direction; and a second area disposed on the outer side of the first area in the front-back direction. The first area has fewer waist panels than the absorbent area. The second area has more waist panels than the first area.

[0011] Another absorbent article comprises: mutually orthogonal front-back and width directions; a crotch area; a waist area disposed on the outer side of the crotch area in the front-back direction, covering the wearer's waist; an absorbent core disposed at least in the crotch area; and a plurality of waist panels disposed in the waist area. The waist panels have absorbent sheets that contact the wearer's skin. The absorbent article comprises: an absorbent area with the absorbent sheets disposed thereon; a first area disposed on the outer side of the absorbent area in the front-back direction; and a second area disposed on the outer side of the first area in the front-back direction. The waist panels have a first waist panel disposed on the skin-closest side in the first area and a second waist panel in contact with the non-skin-closed side of the first waist panel. The first and second waist panels are not joined in the first area, but are joined in the second area. Attached Figure Description

[0012] Figure 1 This is a top view of the absorbent article in its unfolded state according to the first embodiment.

[0013] Figure 2 It is along Figure 1 The cross-sectional view shown along line AA.

[0014] Figure 3 yes Figure 2 A magnified view of part B shown.

[0015] Figure 4 This is a partial enlarged view of the absorbent article according to the second embodiment.

[0016] Figure 5 This is a diagram showing an example of an absorbent article. Detailed Implementation

[0017] (1) Overview of the implementation method

[0018] Based on the description in this specification and the accompanying drawings, at least the following matters become clear.

[0019] Method 1 is an absorbent article comprising: mutually orthogonal front-back and width directions; a crotch area; a waist area disposed on the outer side of the crotch area in the front-back direction, covering the wearer's waist; an absorbent core disposed at least in the crotch area; and a plurality of waist panels disposed in the waist area. The waist panels have absorbent sheets that come into contact with the wearer's skin. The absorbent article comprises: an absorbent area with the absorbent sheets disposed thereon; a first area disposed on the outer side of the absorbent area in the front-back direction; and a second area disposed on the outer side of the first area in the front-back direction. The first area has fewer waist panels than the absorbent area. The second area has more waist panels than the first area. According to this design, a first region with fewer waist panels is located on the outer side of the absorbent area in the front-to-back direction, and a second region with more waist panels is located on the outer side of the first region in the front-to-back direction. The number of waist panels is such that the first region < the absorbent area and the second region < the second region. Furthermore, the first region is sandwiched between the absorbent area and the second region in the front-to-back direction. Therefore, the first region is prone to wrinkling starting from the absorbent area and the second region. When the absorbent material deforms due to the wearer's movements, and wrinkles repeatedly form and disappear in the first region, airflow between the waist region and the wearer increases the efficiency of moisture evaporation. Therefore, moisture inside the absorbent material is released to the outside, suppressing skin problems and discomfort. By making the first area prone to wrinkling, adverse conditions such as skin problems and unpleasant sensations are suppressed. Without changing the structure of the absorbent pad itself, adverse conditions such as skin problems and unpleasant sensations are suppressed. Therefore, compared with increasing the absorbent pad's absorption capacity by increasing the weight per unit area, the discomfort caused by the absorbent pad during wear can be suppressed.

[0020] Method 2 comprises: mutually orthogonal front-back and width directions; a crotch area; a waist area disposed on the outer side of the crotch area in the front-back direction, covering the wearer's waist; an absorbent core disposed at least in the crotch area; and a plurality of waist panels disposed in the waist area. Each waist panel has an absorbent sheet that contacts the wearer's skin. The absorbent article comprises: an absorbent area with the absorbent sheet disposed thereon; a first area disposed on the outer side of the absorbent area in the front-back direction; and a second area disposed on the outer side of the first area in the front-back direction. Each waist panel comprises a first waist panel disposed on the side closest to the skin in the first area and a second waist panel in contact with the non-skin side of the first waist panel. The first and second waist panels are not joined in the first area, but are joined in the second area. According to this solution, a first region, where the first waist piece and the second waist piece are not joined, is located on the outer side in the front-to-back direction of the absorbent area. A second region, where the first waist piece and the second waist piece are joined, is located on the outer side in the front-to-back direction of the first region. The first region is prone to wrinkling starting from the second region. When the absorbent material deforms due to the wearer's movements, and wrinkles repeatedly form and disappear in the first region, airflow between the waist area and the wearer is increased, and the efficiency of moisture evaporation is improved. Therefore, moisture inside the absorbent material is released to the outside, which can suppress skin problems and discomfort. By making the first region prone to wrinkling to suppress adverse conditions such as skin problems and discomfort, adverse conditions such as skin problems and discomfort are suppressed without changing the structure of the absorbent material itself. Therefore, compared with increasing the absorbent capacity by increasing the unit area weight of the absorbent material, discomfort caused by the absorbent material during wear can be suppressed.

[0021] According to a preferred embodiment, the technical solution of Method 3 may have the following features compared to Method 1 or Method 2: In the waist region, a plurality of waist elastic members that extend and retract in the width direction are arranged at intervals in the front-back direction. A plurality of these waist elastic members are arranged in the first region. According to this embodiment, since the plurality of waist elastic members are arranged at intervals in the front-back direction in the first region, the portions between the waist elastic members in the first region are more prone to wrinkling, starting from the portions in the first region where the waist elastic members are arranged. The formation and disappearance of wrinkles are more likely to occur in the first region, further improving transpiration efficiency.

[0022] According to the preferred embodiment, the technical solution of method 4 can have the following characteristics in any of the technical solutions of methods 1 to 3. A plurality of the waist-body elastic members are also disposed in the second region. The maximum spacing in the front-back direction of the waist-body elastic members in the first region is longer than the maximum spacing in the front-back direction of the waist-body elastic members in the second region. According to this embodiment, since the maximum spacing of the waist-body elastic members in the first region is longer than that in the second region, the portion between the waist-body elastic members in the first region is more prone to deformation, and the first region is more prone to wrinkling. Furthermore, since the maximum spacing of the waist-body elastic members in the second region is shorter, when wrinkles repeatedly form and disappear in the first region, the second region adheres, which can suppress the positional shift of the absorbent article.

[0023] According to the preferred embodiment, the technical solution of Method 5 may have the following characteristics in any of the technical solutions of Methods 1 to 4. A plurality of the waist-length elastic members are also disposed in the absorbent area. The maximum spacing in the front-back direction of the waist-length elastic members in the first region is longer than the maximum spacing in the front-back direction of the waist-length elastic members in the absorbent area. According to this embodiment, since the maximum spacing of the waist-length elastic members in the first region is longer than the maximum spacing of the waist-length elastic members in the absorbent area, the portion between the waist-length elastic members in the first region is more prone to deformation, and the first region is more prone to wrinkling. Furthermore, since the maximum spacing of the waist-length elastic members in the absorbent area is shorter, the absorbent area can easily maintain a continuous fit, enabling the absorbent sheet to continuously absorb body fluids.

[0024] According to the preferred embodiment, the technical solution of Method 6 may have the following characteristics in any of the technical solutions of Methods 1 to 5. The absorbent region, the first region, and the second region are elastic in the width direction. The contractile force of the first region in the width direction is lower than that of the absorbent region and lower than that of the second region. According to this solution, since the contractile force of the first region is lower than that of the second region and the absorbent region, the first region is more likely to float relative to the body and wrinkle more easily. Furthermore, since the contractile force of the absorbent region is higher, it is easier for the absorbent region to maintain a continuous fit, allowing for continuous absorption of bodily fluids using the absorbent pad. Additionally, since the contractile force of the second region is relatively high, when wrinkles repeatedly form and disappear in the first region, the second region remains fitted, suppressing positional shift of the absorbent material.

[0025] According to the preferred embodiment, the technical solution of method 7 can have the following characteristics compared to the technical solution of method 6. The contractile force in the width direction of the absorbent region is lower than that in the width direction of the second region. According to this solution, because the contractile force in the width direction of the absorbent region is relatively low, the absorbent pad that has absorbed bodily fluids will not adhere excessively to the skin, thus suppressing adverse effects caused by continuous contact between the absorbent pad's moisture and the skin. On the other hand, the contractile force in the width direction of the second region is relatively high, allowing it to conform to the body. Therefore, when wrinkles repeatedly form and disappear in the first region, the second region adheres, suppressing positional shift of the absorbent material.

[0026] According to the preferred embodiment, the technical solution of method 8 can have the following characteristics compared to the technical solution of method 7: The contractile force in the width direction of the absorbent region is higher than that in the width direction of the second region. According to this solution, because the contractile force of the absorbent region is relatively high, the absorbent region easily adheres to the skin, making it easier to achieve the effect of absorbing body fluids using the absorbent pad.

[0027] According to the preferred embodiment, the technical solution of method 9 may have the following characteristics in any of the technical solutions of methods 1 to 8: The bending stiffness in the front-back direction of the first region is lower than that in the front-back direction of the absorbent region, and also lower than that in the front-back direction of the second region. According to this embodiment, since the bending stiffness in the front-back direction of the first region is lower, the first region is more prone to wrinkling starting from the absorbent region and the second region. Therefore, airflow between the waist area and the wearer can be improved, increasing the evaporation efficiency of moisture.

[0028] According to the preferred embodiment, the technical solution of method 10 may have the following characteristics in any of the technical solutions of methods 1 to 9: The thickness of the first region is thinner than the thickness of the absorbent region and thinner than the thickness of the second region. According to this embodiment, the first region is more easily wrinkled starting from the absorbent region and the second region. In addition, since the first region is thinner, a larger space can be set between the wearer and the absorbent material in the first region, which can improve airflow.

[0029] According to the preferred embodiment, the technical solution of Method 11 may have the following features in any of Methods 1 to 10. The absorbent article has an absorbent body, which has an absorbent core, a liquid-permeable top sheet covering the skin side of the absorbent core, and a liquid-impermeable bottom sheet covering the non-skin side of the absorbent core. In the front-back direction, the outer edge of the absorbent body is located inside the outer edge of the absorbent region and outside the inner edge of the absorbent region. According to this embodiment, the absorbent body is disposed in the absorbent region, but not in the first region. Therefore, due to the bending stiffness, thickness, etc., of the absorbent region, the absorbent region is not easily deformed, making it easy for the absorbent sheet to maintain continuous contact. On the other hand, the first region is more deformable than the absorbent region, allowing airflow between the waist area and the wearer, which can improve the evaporation efficiency of moisture.

[0030] According to the preferred embodiment, the technical solution of method 12 may have the following characteristics in any of the technical solutions of methods 1 to 11: The length of the first region in the front-back direction is longer than at least one of the length of the absorbent region in the front-back direction and the length of the second region in the front-back direction. According to this solution, the length of the first region in the front-back direction can be ensured, making the first region prone to wrinkling. Furthermore, by ensuring the length of the first region in the front-back direction, the area where wrinkling occurs is increased, further improving the airflow achieved through wrinkling.

[0031] According to the preferred embodiment, the technical solution of method 13 may have the following characteristics in any of the technical solutions of methods 1 to 12: The waist piece disposed in the first region is configured across the absorbent region and the second region. According to this embodiment, by configuring the waist piece across the first region, the absorbent region, and the second region, force is easily transmitted across each region (force is less likely to be interrupted in each region), and the first region is more likely to wrinkle starting from the absorbent region and the second region.

[0032] According to a preferred embodiment, the technical solution of embodiment 14 may have the following features in any of embodiments 1 to 13. The waistband has a first waistband disposed on the side closest to the skin in the first region. The first waistband is also disposed on the side closest to the skin in the second region. According to this embodiment, since the first waistband is disposed on the side closest to the skin in both the first and second regions, air between the wearer and the absorbent material easily flows along the surface of the first waistband in the front-back direction. Therefore, when air flows between the absorbent material and the wearer in the first region, this airflow is easily guided to the second region along the first waistband. The second region is located on the waist opening side, facilitating the release of air from the absorbent material to the outside of the absorbent material via the second region.

[0033] According to the preferred embodiment, the technical solution of method 15 may have the following features in any of the technical solutions of methods 1 to 14. The waist region has a front waist region against the wearer's abdomen and a rear waist region against the wearer's back. The absorbent regions are respectively located in the front waist region and the rear waist region, and the first region is respectively located in the front waist region and the rear waist region. The length of the first region in the rear waist region in the anteroposterior direction is longer than the length of the first region in the front waist region in the anteroposterior direction. Generally, the back side is more prone to producing sweat and other bodily fluids than the abdomen side. According to this solution, because the length of the first region in the rear waist region in the anteroposterior direction is longer, the evaporation efficiency of water in the rear waist region can be improved, suppressing skin problems and unpleasant sensations.

[0034] According to the preferred embodiment, the technical solution of embodiment 16 may have the following features in any of embodiments 1 to 15. The waist panel has a stretchable sheet that is stretchable in the width direction. The stretchable sheet is arranged across the absorbent area, the first area, and the second area. In the waist area, a plurality of waist elastic members that stretch and contract in the width direction are arranged at intervals in the front-back direction. The waist elastic members are arranged in the second area. According to this embodiment, the stretchable sheet and waist elastic members are arranged in the second area, resulting in a closer fit to the body. While the absorbent area, the first area, and the second area are made to fit the body as a whole using the stretchable sheet, the first area can deform from the second area onwards, further improving the airflow achieved by wrinkling.

[0035] According to the preferred embodiment, the technical solution of mode 17 may have the following feature in any of the technical solutions of modes 1 to 16: In the front-back direction, the distance between the inner edge of the first region and the outer edge of the water-absorbing region is less than 10 mm.

[0036] According to a preferred embodiment, the technical solution of embodiment 18 may have the following features in any of embodiments 1 to 17. The absorbent region has: a first absorbent region extending from the outer edge of the absorbent region in the front-rear direction toward the inner side in the front-rear direction, and the absorbent sheet is arranged in the first absorbent region in a manner that allows it to stand upright toward the skin; and a second absorbent region extending from the inner edge of the first absorbent region in the front-rear direction toward the inner side in the front-rear direction, and the absorbent sheet is arranged in the second absorbent region in a manner that prevents it from standing upright toward the skin.

[0037] According to the preferred embodiment, the technical solution of mode 19 may have the following characteristics in any of the technical solutions of modes 1 to 18: The number of waist-shaped sheets in the first region is the same as the number of waist-shaped sheets in the absorbent region.

[0038] According to the preferred embodiment, the technical solution of mode 20 may have the following feature in any of the technical solutions of modes 1 to 19: The length of the first region in the front-back direction is 10 mm or more.

[0039] (2) Implementation methods of absorbent articles

[0040] The absorbent article according to the embodiments will be described below with reference to the accompanying drawings. Furthermore, in the following description of the drawings, the same or similar parts are labeled with the same or similar reference numerals. However, it should be noted that the drawings are schematic and there may be differences from reality in terms of scale and other dimensions. Therefore, specific dimensions should be determined by referring to the following description. Additionally, the drawings may contain parts with different dimensional relationships or scales.

[0041] Figure 1 This is a front view of the absorbent article 10A of the first embodiment in its unfolded state. Figure 1 The top view shown is an illustration of the absorbent article in its elongated state as observed from the skin side. Furthermore, the elongated state in this invention refers to the state in which the absorbent article 10 is elongated without forming wrinkles when the lateral joint 60 (described later) is unfolded. Additionally, the natural state in this invention refers to the state of the absorbent article after it has been removed from the packaging and placed in an atmosphere of 20°C ± 2°C and 60% ± 5% RH for 24 hours. Figure 2 It is along Figure 1 The sectional view shown is along line AA. Figure 3 yes Figure 2 An enlarged sectional view of part B shown. Figure 4 This is an enlarged cross-sectional view of the absorbent article 10B according to the second embodiment. Figure 4 The sectional view shown is Figure 3 The cross-sectional view is based on the section. In the following description, the structure characteristic of the first embodiment will be described as the structure of absorbent article 10A, and the structure characteristic of the second embodiment will be described as the structure of absorbent article 10B. The common structure of the first and second embodiments will be described as the structure of absorbent article 10.

[0042] The absorbent article 10 can be any absorbent article that covers the waist area of ​​the wearer, such as disposable diapers or panty-style sanitary napkins. The absorbent article 10 has a front-to-back direction L and a width direction W that are orthogonal to each other. The front-to-back direction L is defined by directions extending towards the front and back of the body. In other words, the front-to-back direction L is the direction that extends front-to-back in the unfolded absorbent article 10. Additionally, the absorbent article 10 has a thickness direction T that is orthogonal to both the front-to-back direction L and the width direction W. The thickness direction T extends towards the skin side T1 facing the wearer and the non-skin side T2 away from the wearer.

[0043] The absorbent article 10 has a crotch area S3 and a waist area located on the outer side of the crotch area S3 in a forward-backward direction L, covering the wearer's waist. The waist area may have a front waist area S1 and a back waist area S2. The waist area may also be one of the front waist area S1 and the back waist area S2. The front waist area S1 is the area against the wearer's abdomen. The back waist area S2 is the area against the wearer's back. The crotch area S3 is the area located in the wearer's crotch and positioned between the front waist area S1 and the back waist area S2.

[0044] The absorbent article 10 may be provided with a lateral joining portion 60 that joins the outer portions of the front waist region S1 and the outer portions of the rear waist region S2. The lateral joining portion 60 may be defined by a portion that interlocks the outer portions of the front waist region S1 and the rear waist region S2, extending along the front-rear direction L in both the front waist region S1 and the rear waist region S2. Here, the outer portion in this invention refers to a portion occupying a certain range in the width direction W, including its edge, and the outer edge refers to the edge in the width direction W. Figure 2 This indicates the state where the connection at the side joint 60 is released and the absorbent article 10 is unfolded. With the side joint 60 formed, the absorbent article 10 has a waist opening 62 for the wearer's torso to pass through and a pair of leg openings 65 for the wearer's legs to insert into. The waist opening 62 is defined by the front edge of the front waist region S1 and the rear edge of the rear waist region S2. Alternatively, the boundary between the front waist region S1 and the crotch region S3 may be defined by the rear edge of the side joint 60 in the front waist region S1, and the boundary between the rear waist region S2 and the crotch region S3 may be defined by the front edge of the side joint 60 in the rear waist region S2.

[0045] Multiple waist panels are disposed in the waist area. The waist panels are sheets other than the absorbent main body 40 described later, which are disposed in the waist area. The waist panels may be made of, for example, a non-woven fabric sheet. The waist panels have absorbent sheets 70 that come into contact with the wearer's skin. The absorbent sheets 70 may have a front absorbent sheet 71 disposed in the front waist area S1 and a rear absorbent sheet 72 disposed in the rear waist area S2. In this embodiment, the absorbent sheets 70 are disposed in both the front waist area S1 and the rear waist area S2. Furthermore, in a variation, the absorbent sheets 70 may be disposed only in one of the front waist area S1 and the rear waist area S2. In the following description, the common structure of the front absorbent sheet 71 and the rear absorbent sheet 72 will be described as the structure of the absorbent sheet 70. The absorbent sheet 70 is disposed on the skin-closest side T1 of the waist area, and comes into contact with the wearer's skin. Absorbent pad 70 is a sheet material capable of absorbing sweat and other bodily fluids. When worn, absorbent pad 70 comes into contact with the wearer's skin to absorb sweat and other bodily fluids. Absorbent pad 70 is bonded to components such as sheet material located on the non-skin side T2 of absorbent pad 70 using adhesives or other bonding methods.

[0046] The absorbent sheet 70 can be composed of a single sheet or multiple sheets. The absorbent sheet 70 can be a pulp sheet containing at least pulp fibers. Examples of pulp fibers include wood pulp and non-wood pulp. Examples of wood pulp include coniferous pulp and broadleaf pulp; examples of non-wood pulp include cotton pulp, hemp pulp, rice straw pulp, bamboo pulp, bagasse pulp, reed pulp, and kenaf pulp. The pulp sheet can contain hydrophilic fibers other than pulp fibers. Examples of hydrophilic fibers include natural fibers such as regenerated cellulose fibers (rayon, viscose rayon, etc.), semi-synthetic cellulose fibers (cellulose acetate, etc.), and refined cellulose fibers. The pulp sheet may also contain pulp fibers but not thermoplastic fibers.

[0047] The absorbent sheet 70 may also include an absorbent nonwoven fabric sheet. The absorbent nonwoven fabric sheet may overlap with the pulp sheet in the thickness direction T. The absorbent nonwoven fabric sheet may contain thermoplastic fibers. Examples of thermoplastic resin fibers include polyolefin polymers (polyethylene, polypropylene, polyester, polyethylene terephthalate, etc.), polyamide polymers, acrylic polymers, fibers using these polymers, and fibers composed of combinations of these polymers. The absorbent sheet 70 may include at least one of a pulp sheet and an absorbent nonwoven fabric sheet. The absorbent sheet 70 of this embodiment is composed of a single layer of absorbent nonwoven fabric sheet.

[0048] The waist panel has a sheet material other than the absorbent sheet 70. The waist panel may have a first waist panel 35 disposed in the first region R11, closest to the skin side T1, and a second waist panel 36 disposed at a position closer to the non-skin side T2 than the first waist panel 35. The first waist panel 35 and the second waist panel 36 may be made of separate sheets, or they may be formed by folding the same sheet back. In this embodiment, the first sheet 75 and the second sheet 76 constitute the first waist panel 35 and the second waist panel 36. The first sheet 75 covers the non-skin side of the absorbent body 40. The second sheet 76 has a non-folded portion 761 located at a position closer to the non-skin side T2 than the first sheet 75, and a folded portion 762 folded back towards the skin side T1 with the waist opening 62 (the front edge of the front waist region S1 and the rear edge of the rear waist region S2) as the base point. The folded-back portion 762 of the second sheet 76 is disposed on the skin side T1 of the first sheet 75. The folded-back portion 762 can be separated from the outer edge 70E of the absorbent sheet 70 in the front-back direction L. Here, the outer edge in the present invention refers to the edge located on the outer side in the front-back direction L, and the inner edge refers to the edge located on the inner side in the front-back direction L. In this embodiment, the first sheet 75, the second sheet 76, and the absorbent sheet 70 constitute the "waistline sheet" of the present invention. The first sheet 75 and the second sheet 76 are made of thermoplastic fibers. In this embodiment, the unit area weight of the first sheet 75 and the unit area weight of the second sheet 76 can be 10 g / m², respectively. 2 ~35g / m 2 Piece 1 (75) and piece 2 (76) can be made of spunbond nonwoven fabric, SMS nonwoven fabric, or dot-bonded nonwoven fabric.

[0049] A waist elastic member 32 that can stretch and contract in the width direction W can be disposed in the waist region. The waist elastic member 32 can be, for example, made of an elastic band that can stretch and contract in the width direction W or an elastic sheet that can stretch and contract in the width direction W. Multiple waist elastic members 32 can be disposed at intervals in the front-to-back direction L. Multiple waist elastic members 32 can be disposed in the front waist region S1 and the rear waist region S2 respectively. The waist elastic member 32 has: a first waist elastic member 321 disposed between the folded portion 762 and the non-folded portion 761 of the second piece 76; and a second waist elastic member 322 disposed at a position inside the front-to-back direction L of the first waist elastic member 321, and disposed between the non-folded portion 761 of the first piece 75 and the second piece 76. The first waist elastic member 321 is disposed in the third region R13 (described later), and the second waist elastic member 322 is disposed in the first region R11, the second region R12, and the absorbent region R15 (described later). A leg elastic member 38 may be disposed in the waist region along the leg opening 65.

[0050] The absorbent article 10 has an absorbent core 45 disposed at least in the crotch region S3. The absorbent core 45 may contain, for example, pulverized pulp or superabsorbent polymer (SAP), or a mixture thereof. The absorbent core 45 is disposed at least in the crotch region S3. Preferably, the absorbent core 45 may extend from the front waist region S1 to the rear waist region S2 in the posterior-posterior direction L. The absorbent core 45 may be covered by a core-cladding layer.

[0051] The absorbent article 10 may have an absorbent body 40. The absorbent body 40 has an absorbent core 45, a liquid-permeable top sheet 41 covering the skin side T1 of the absorbent core 45, and a liquid-impermeable bottom sheet 42 covering the non-skin side T2 of the absorbent core 45. The absorbent body 40 may be disposed at least in the crotch region S3 and may extend along the front waist region S1 and the back waist region S2. The absorbent body 40 may be separately constructed from the waist sheet. The absorbent body 40 may have a non-skin side sheet 43 covering the non-skin side T2 of the bottom sheet 42. The top sheet 41 and the non-skin side sheet 43 may be made of non-woven fabric. The bottom sheet 42 may be made of a membrane.

[0052] The absorbent article 10 of this embodiment is configured to suppress discomfort caused by the absorbent pad 70 during wear and to suppress adverse conditions such as skin problems and unpleasant sensations. Next, the structure for suppressing discomfort caused by the absorbent pad 70 during wear and suppressing adverse conditions such as skin problems and unpleasant sensations will be described. The structures for suppressing discomfort caused by the absorbent pad 70 during wear and suppressing adverse conditions such as skin problems and unpleasant sensations are generally divided into the first embodiment and the second embodiment.

[0053] The absorbent article 10 has an absorbent region R15, a first region R11, and a second region R12. The absorbent region R15 is the area where the absorbent sheet 70 is disposed when viewed from above. Figure 3 The diagram shows the range of its front-to-back direction L. The inner edge of the absorbent region R15 is the inner edge 70I of the absorbent sheet 70, and the outer edge of the absorbent region R15 is the outer edge 70E of the absorbent sheet 70. The absorbent sheet 70 is disposed over the entire width direction W of the waist region, and the width direction W of the absorbent region R15 is the area enclosed by the outer edges of both sides of the waist region. The first region R11 is disposed on the outer side of the absorbent region R15 in the front-to-back direction L. The second region R12 is disposed on the outer side of the first region R11 in the front-to-back direction L.

[0054] In the absorbent article 10A of the first embodiment, the first region R11 has fewer waist-shaped sheets than the absorbent region R15. The number of waist-shaped sheets in the first region R11 only needs to be less than the number of waist-shaped sheets in at least a partial area of ​​the absorbent region R15. Therefore, the absorbent region R15 may have a portion where the number of waist-shaped sheets is the same as the number of sheets in the first region R11, or a portion where the number of waist-shaped sheets is greater than the number of sheets in the first region R11. However, suitably, the number of waist-shaped sheets in the entire absorbent region R15 may be greater than the number of waist-shaped sheets in the first region R11, and the number of waist-shaped sheets in the entire first region R11 may be less than the number of waist-shaped sheets in the absorbent region R15. Figure 3 The diagram shows the range of the front-rear direction L of the first region R11. In the absorbent article 10A of the first embodiment, the second region R12 has more waist-shaped sheets than the first region R11. Figure 3 The diagram shows the range of the front-back direction L of the second region R12.

[0055] In the absorbent article 10A of the first embodiment, a first region R11 with fewer waist-shaped panels is provided on the outer side of the absorbent region R15 in the front-rear direction L, and a second region R12 with more waist-shaped panels is provided on the outer side of the first region R11 in the front-rear direction L. The number of waist-shaped panels is: first region R11 < absorbent region R15, and first region R11 < second region R12. Furthermore, the first region R11 is sandwiched between the absorbent region R15 and the second region R12 in the front-rear direction L. Therefore, the first region R11 is prone to wrinkling starting from the absorbent region R15 and the second region R12, and is prone to floating in the thickness direction, or its floating is prone to disappearing. If the absorbent article 10A deforms due to the wearer's activities, etc., the repeated generation and disappearance of wrinkles in the first region R11 improves the airflow between the waist-shaped region and the wearer, and increases the efficiency of moisture evaporation. Therefore, moisture inside the absorbent material 10A is released to the outside, suppressing skin problems and discomfort. Furthermore, through airflow between the waist area and the wearer, the moisture absorbed by the absorbent pad 70 easily evaporates, further suppressing skin problems and discomfort. By making the first area R11 prone to wrinkling to suppress skin problems and discomfort, and without altering the structure of the absorbent pad 70 itself, this method suppresses skin problems and discomfort while wearing the absorbent pad 70. Therefore, compared to increasing the absorbency by increasing the weight per unit area of ​​the absorbent pad 70, it effectively reduces discomfort caused by the absorbent pad 70.

[0056] The absorbent region R15, the first region R11, and the second region R12 of the first embodiment are configured as follows. The folded portion 762 of the second sheet 76 is disposed in the second region R12, but not in the first region R11. In the first region R11, the first sheet 75 is disposed on the side closest to the skin T1, and the first sheet 75 constitutes the first waist sheet 35. In the first region R11, the non-folded portion 761 of the second sheet 76 is disposed on the non-skin side T2 of the first sheet 75, and the second sheet 76 constitutes the second waist sheet 36. The absorbent sheet R15 is provided with the non-folded portion 761 of the absorbent sheet 70, the first sheet 75, and the second sheet 76, and the number of waist sheets in the absorbent region R15 is three. In region R11, a first piece 75 serving as the first waist piece 35 and a non-folded portion 761 serving as the second waist piece 36 are arranged, and the number of waist pieces in region R11 is two. The inner edge of region R11 is the outer edge of the water-absorbing region R15. However, in a modified example, the inner edge of region R11 and the outer edge of the water-absorbing region R15 may be separated in the front-rear direction L. In region R12, a non-folded portion 761 of the second piece 76, a first piece 75, and a folded portion 762 of the second piece 76 are arranged, and the number of waist pieces in region R12 is three. The inner edge of region R12 is the outer edge of region R11 and coincides with the inner edge of the folded portion 762. The outer edge of region R12 is the outer edge of the first piece 75. Furthermore, in this embodiment, the outer edge of the first piece 75 is located inside the waist region (waist opening) in the front-rear direction L. Therefore, the outer edge of the second region R12 is separated from the outer edge of the waist region and is located inside the waist region in the front-rear direction L. A third region R13, with fewer waist pieces than the second region R12, is provided outside the waist region in the front-rear direction L than the outer edge of the first piece 75. However, in a modified example, the outer edge of the first piece 75 may extend to the outer edge of the waist region, and the second region R12 may also extend to the outer edge of the waist region. That is, the third region R13 may not be provided.

[0057] like Figure 4 As shown, in the absorbent article 10B of the second embodiment, in the first region R11, the first waist piece 35 and the second waist piece 36 are not joined, and in the second region R12, the first waist piece 35 and the second waist piece 36 are joined. Figure 4 The diagram shows the range of the front-rear direction L of the first region R11. In the absorbent article 10B of the second embodiment, the first waist piece 35 and the second waist piece 36 are joined in the second region R12. Figure 4 The diagram shows the range of the front-back direction L of the second region R12.

[0058] In the absorbent article 10B of the second embodiment, a first region R11, where the first waist piece 35 and the second waist piece 36 are not joined, is located on the outer side of the absorbent region R15 in the front-rear direction L. A second region R12, where the first waist piece 35 and the second waist piece 36 are joined, is located on the outer side of the first region R11 in the front-rear direction L. The first region R11 is prone to wrinkling starting from the second region R12. If the absorbent article 10B deforms due to the wearer's activities, the repeated formation and disappearance of wrinkles in the first region R11 increases the airflow between the waist area and the wearer, thus improving the efficiency of moisture evaporation. Therefore, moisture inside the absorbent article 10B is released to the outside, suppressing skin problems and discomfort. By making the first area R11 prone to wrinkling, adverse conditions such as skin problems and unpleasant sensations are suppressed. Without changing the structure of the absorbent pad 70 itself, adverse conditions such as skin problems and unpleasant sensations are suppressed. Therefore, compared with increasing the absorption capacity by increasing the unit area weight of the absorbent pad 70, the discomfort caused by the absorbent pad 70 during wear can be suppressed.

[0059] The absorbent region R15, the first region R11, and the second region R12 of the second embodiment are configured as follows. The folded portion 762 of the second sheet 76 is disposed in the second region R12 and the first region R11, but not in the absorbent region R15. In the first region R11, the folded portion 762 of the second sheet 76 is disposed on the surface closest to the skin T1, and the folded portion 762 of the second sheet 76 constitutes the first waist piece 35. The first sheet 75 is disposed on the non-skin side T2 of the folded portion 762 of the second sheet 76, and the first sheet 75 constitutes the second waist piece 36. The folded portion 762 of the second sheet 76, which is the first waist piece 35, engages with the first sheet 75, which is the second waist piece 36, in the second region R12, but is not engaged with the first sheet 75 in the first region R11. Figure 4 The diagram shows a joint 37 connecting the first waist piece 35 and the second waist piece 36. The joint 37 may be made of adhesive. Furthermore, in the second embodiment, the folded-back portion 762 is not disposed in the absorbent region R15, but it may also be disposed in the absorbent region R15. Additionally, in the second embodiment, the number of waist pieces in the first region R11 is the same as the number of waist pieces in the second region R12, but it may be less or more than the number of waist pieces in the second region R12.

[0060] Next, suitable structures will be described in the first and second embodiments. Multiple waist elastic members 32 can be arranged in the first region R11. According to this solution, since the multiple waist elastic members 32 are arranged at intervals in the front-rear direction L in the first region R11, the portions between the waist elastic members 32 in the first region R11 are more prone to wrinkling starting from the portions in the first region R11 where the waist elastic members 32 are arranged. The formation and disappearance of wrinkles are more easily achieved within the first region R11, further improving the evaporation efficiency of water. In this embodiment, three waist elastic members 32 are arranged at intervals in the front-rear direction L in the first region R11.

[0061] Multiple waist-length elastic members 32 can also be arranged in the second region R12. The maximum spacing in the front-rear direction L of the waist-length elastic members 32 in the first region R11 can be longer than the maximum spacing in the front-rear direction L of the waist-length elastic members 32 in the second region R12. Since the maximum spacing of the waist-length elastic members 32 in the first region R11 is longer than the maximum spacing of the waist-length elastic members 32 in the second region R12, the portion between the waist-length elastic members 32 in the first region R11 is more prone to deformation, and the first region R11 is more prone to wrinkling. In addition, since the maximum spacing of the waist-length elastic members 32 in the second region R12 is shorter, when wrinkles are repeatedly generated and disappeared in the first region R11, the second region R12 fits together, which can suppress the positional displacement of the absorbent article 10. Furthermore, the average spacing in the front-rear direction L of the waist-length elastic members 32 in the first region R11 can be longer than the average spacing in the front-rear direction L of the waist-length elastic members 32 in the second region R12. Using this structure, it is also possible to achieve the effect that the first region R11 is more prone to wrinkling and the second region R12 fits together to suppress the positional displacement of the absorbent material 10.

[0062] Multiple waist-length elastic members 32 can also be arranged in the second region R12. The maximum spacing in the front-back direction L of the waist-length elastic members 32 in the first region R11 can be longer than the maximum spacing in the front-back direction L of the waist-length elastic members 32 in the absorbent region R15. Because the maximum spacing of the waist-length elastic members 32 in the first region R11 is longer than the maximum spacing of the waist-length elastic members 32 in the absorbent region R15, the portion between the waist-length elastic members 32 in the first region R11 is more prone to deformation, and the first region R11 is more prone to wrinkling. In addition, because the maximum spacing of the waist-length elastic members 32 in the absorbent region R15 is shorter, the absorbent region R15 is easier to maintain a continuous fit, and the absorbent pad can continuously absorb body fluids. Furthermore, the average spacing in the front-back direction L of the waist-length elastic members 32 in the first region R11 can be longer than the average spacing in the front-back direction L of the waist-length elastic members 32 in the absorbent region R15. This structure also allows for the effect of the first region R11 being easier to wrinkle and the absorbent region R15 fitting together to continuously absorb body fluids using the absorbent pad 70.

[0063] It is possible that the number of elastic waist members 32 in region 1 R11 is less than the number of elastic waist members 32 in absorbent region R15, and also less than the number in region 2 R12. Because region 1 R11 has fewer elastic waist members 32, it does not fit excessively against the wearer, making it more prone to deformation and wrinkling. Conversely, because region 15 has more elastic waist members 32, it maintains a consistent fit, allowing the absorbent pad 70 to continuously absorb bodily fluids. Furthermore, because region 2 R12 has more elastic waist members 32, it adheres better to repeated wrinkle formation and disappearance in region 1 R11, thus preventing positional shift of the absorbent article 10.

[0064] In this embodiment, the waist elastic member 32 is disposed in the absorbent region R15, the first region R11, and the second region R12. The absorbent region R15, the first region R11, and the second region R12 are elastic in the width direction W. Specifically, the contractile force in the width direction W of the first region R11 is lower than that of the absorbent region R15, and also lower than that of the second region R12. According to this solution, since the contractile force of the first region R11 is lower than that of the second region R12 and the absorbent region R15, the first region R11 is more likely to float relative to the body and wrinkle more easily. Furthermore, since the contractile force of the absorbent region R15 is higher, the absorbent region R15 is easier to maintain a continuous fit, allowing the absorbent sheet 70 to continuously absorb bodily fluids. In addition, since the contraction force of the second region R12 is relatively high, when the wrinkles in the first region R11 are repeatedly generated and disappeared, the second region R12 adheres and can suppress the positional displacement of the absorbent item 10.

[0065] "Shrinkage force" refers to the ease of shrinkage in the width direction W, which can be measured as follows. First, tear open the side joint of the absorbent article 10 to make the absorbent article 10 unfolded, obtaining a sample of the front waist region S1 and a sample of the back waist region S2. Cut out the absorbent region R15, the first region R11, and the second region R12 from the front waist region S1 and the back waist region S2. Then, for each sample, with each end 10mm in the width direction W as the gripping part and the part other than the gripping part as the remaining part, pre-measure the dimension LA (mm) in the width direction W of the remaining part when it is unfolded in the front-back direction L and the width direction W to a wrinkle-free state (100% elongation state). Next, by using the upper and lower chucks of a tensile testing machine (such as the Shimadzu AGS-X universal testing machine) to grip the sample, the distance between the upper and lower chucks is widened, thereby stretching the sample in a contracted state at a tensile speed of 100 mm / min along the width direction W to 85% of the aforementioned LA. Then, the distance between the chucks is narrowed to 70% of the length of LA. The force during this narrowing state is defined as the contraction force (N).

[0066] The contractile force in the width direction W of the absorbent region R15 can be lower than that in the width direction W of the second region R12. According to this design, because the contractile force in the width direction W of the absorbent region R15 is relatively low, the absorbent pad 70, having absorbed bodily fluids, will not adhere excessively to the skin, thus suppressing adverse effects caused by continuous contact between the absorbent pad 70 and the skin. On the other hand, the contractile force in the width direction W of the second region R12 is relatively high, conforming to the body. Therefore, when wrinkles repeatedly form and disappear in the first region R11, the second region R12 adheres, suppressing positional shift of the absorbent item 10. Furthermore, the contractile force in the width direction of the third region, located further outward than the second region R12, can be higher than that in the width direction of the first region R11, and suitably, higher than that in the width direction of the second region R12. This makes it easier to achieve the effect of the third region R13 conforming to the body and suppressing positional shift of the absorbent item 10.

[0067] In a modified example, the contractile force in the width direction W of the absorbent region R15 can also be higher than the contractile force in the width direction W of the second region R12. According to this solution, since the contractile force of the absorbent region R15 is relatively high, the absorbent region R15 is easier to adhere to the skin, and it is easier to achieve the effect of absorbing body fluids using the absorbent pad 70.

[0068] It is possible that the bending stiffness in the front-back direction L of region 1 R11 is lower than that in the front-back direction L of the absorbent region R15, and also lower than that in the front-back direction L of region 2 R12. According to this scheme, since the bending stiffness in the front-back direction L of region 1 R11 is lower, region 1 R11 is more prone to wrinkling starting from the absorbent region R15 and region 2 R12. Therefore, airflow between the waist area and the wearer can be improved, increasing the evaporation efficiency of moisture. Here, the bending stiffness can be measured by the Gurley stiffness test method of JIS L1096:2010. For example, firstly, a structure identical to the area to be measured is prepared, and a sample with a width of 25 mm and a front-back direction of 38 mm is collected. The sample is placed with one end 6.3 mm of the sample in the front-back direction L held in the chuck and the other end 6.3 mm of the sample in the front-back direction L in contact with the pendulum B. Next, select the weight and installation position of the auxiliary counterweight, and install the auxiliary counterweight so that the scale of the Göhler softness tester is between 3 and 6. Then, with the test piece on the left side of the pendulum, press the left rotation switch, and with the test piece on the right side of the pendulum, press the right rotation switch to rotate the movable arm. Then, read the scale at the moment the pendulum's rotating rod leaves the test piece. For a single test piece, the measurement is performed using both right and left rotations of the pendulum.

[0069] The bending stiffness of the absorbent region R15 in the front-back direction L can be higher than that of the second region R12 in the front-back direction L. According to this design, the absorbent region R15 is less prone to deformation in the front-back direction L, ensuring sufficient contact area between the absorbent region R15 and the skin, making it easier to achieve the effect of absorbing bodily fluids using the absorbent pad 70. Furthermore, in a modified example, the bending stiffness of the second region R12 in the front-back direction L can be higher than that of the absorbent region R15 in the front-back direction L. According to this design, the absorbent pad 70, having absorbed bodily fluids, will not adhere excessively to the skin, suppressing adverse effects caused by continuous contact between the absorbent pad 70 and the skin. On the other hand, the second region R12 is less prone to deformation in the front-back direction L, ensuring sufficient contact area with the skin. Therefore, when wrinkles repeatedly form and disappear in the first region R11, the second region R12 adheres, suppressing positional shift of the absorbent article 10.

[0070] It is permissible that the thickness of region 1, R11, is thinner than that of absorbent region R15, and also thinner than that of region 2, R12. According to this design, region 1, R11, is more prone to wrinkling starting from absorbent regions R15 and R12. Therefore, airflow between the waist area and the wearer is improved, increasing moisture evaporation efficiency. Furthermore, because region 1, R11, is thinner, a larger space can be created between the wearer and the absorbent material 10 within region 1, further enhancing airflow. Moreover, when the thickness is constant throughout the target area, this constant thickness can be used for comparison. Alternatively, when the thickness is not constant throughout the target area, the thickness can be measured at 10mm intervals in both the front-to-back direction (L) and the width direction (W), and the average value can be recorded.

[0071] The thickness of the absorbent region R15 can be greater than the thickness of the second region R12. According to this design, the absorbent region R15 is less prone to deformation in the front-to-back direction L, ensuring sufficient contact area between the absorbent region R15 and the skin, thus facilitating the absorption of bodily fluids by the absorbent pad 70. Furthermore, in a modified version, the thickness of the second region R12 can be greater than the thickness of the absorbent region R15. According to this design, the absorbent pad 70, having absorbed bodily fluids, will not adhere excessively to the skin, preventing adverse effects caused by continuous contact between the absorbent pad 70 and the skin. On the other hand, the second region R12 is less prone to deformation in the front-to-back direction L, ensuring sufficient contact area with the skin. Therefore, when wrinkles repeatedly form and disappear in the first region R11, the second region R12 adheres, preventing positional shift of the absorbent item 10.

[0072] In the front-to-back direction L, the outer edge of the absorbent body 40 can be located inside the outer edge of the absorbent region R15 and outside the inner edge of the absorbent region R15. According to this design, the absorbent body 40 is disposed in the absorbent region R15, but not in the first region R11. Therefore, due to the bending stiffness and thickness of the absorbent region R15, it is less prone to deformation, making it easier for the absorbent sheet 70 to maintain continuous contact. On the other hand, the first region R11 is more deformable than the absorbent region R15, allowing airflow between the waist area and the wearer, which improves the evaporation efficiency of moisture.

[0073] The total weight per unit area of ​​the waistband pieces disposed in region 1 R11 can be smaller than the total weight per unit area of ​​the waistband pieces disposed in absorbent region R15, and also smaller than the total weight per unit area of ​​the waistband pieces disposed in region 2 R12. The total weight per unit area is the weight per unit area obtained by adding the weights per unit area of ​​the waistband pieces disposed in each region. For example, the total weight per unit area of ​​region 1 R11 is the value obtained by adding the weights per unit area of ​​the first waistband piece 35 and the second waistband piece 36. According to this design, region 1 R11 is more prone to wrinkling starting from absorbent region R15 and region 2 R12. Therefore, airflow between the waistband area and the wearer is facilitated, improving moisture evaporation efficiency. Furthermore, the lower total weight per unit area of ​​region 1 R11 results in higher breathability. Therefore, air can enter and exit through region 1 R11, facilitating water vapor evaporation and reducing stuffiness in the absorbent material 10.

[0074] The length of region R11 in the front-back direction L is longer than at least one of the lengths of region R15 and R12 in the front-back direction L. That is, it is possible to satisfy either the length of region R11 in the front-back direction L > the length of region R15 in the front-back direction L or the length of region R11 in the front-back direction L > the length of region R12 in the front-back direction L. Suitablely, it is possible to satisfy both the length of region R11 in the front-back direction L > the length of region R15 in the front-back direction L and the length of region R11 in the front-back direction L > the length of region R12 in the front-back direction L. According to this solution, the length of region R11 in the front-back direction L can be ensured, making region R11 easier to wrinkle. Furthermore, by ensuring the length of region R11 in the front-back direction L, the area where wrinkling occurs is increased, further improving the airflow achieved through wrinkling.

[0075] The waist piece disposed in region 1 R11 can be disposed across regions 15 and 2 R12. According to this design, by distributing the waist piece across regions 1 R11, 15, and 2 R12, force is easily transmitted across each region (force is less likely to be interrupted in each region), and region 1 R11 is more prone to wrinkling starting from regions 15 and 2 R12. It is permissible for at least one of the multiple waist pieces disposed in region 1 R11 to span regions 15 and 2 R12, but suitably, any one of the multiple waist pieces disposed in region 1 R11 may span regions 15 and 2 R12. In the first embodiment and the second embodiment, a non-folded portion 761 of a first piece 75 and a second piece 76 is provided in the first region R11. The non-folded portion 761 of the first piece 75 and the second piece 76 is arranged across the first region R11, the second region R12 and the water-absorbing region R15.

[0076] In the configuration of the absorbent pad 70 in both the front waist region S1 and the back waist region S2, the absorbent region R15, the first region R11, and the second region R12 can be located in at least one of the front waist region S1 and the back waist region S2. However, it is suitable that the absorbent region R15, the first region R11, and the second region R12 can be located in both the front waist region S1 and the back waist region S2. The length of the first region R11 in the back waist region S2 in the anteroposterior direction L can be longer than the length of the first region R11 in the front waist region S1 in the anteroposterior direction L. According to this design, generally speaking, the back side is more prone to producing sweat and other bodily fluids than the abdomen side. By making the length of the first region R11 in the back waist region S2 longer in the anteroposterior direction L, the evaporation efficiency of water in the back waist region S2 can be improved, thus suppressing skin problems and unpleasant sensations.

[0077] Furthermore, the length of the absorbent pad 70 in the front-to-back direction L of the lower back region S2 (the length of the rear absorbent pad 72 in the front-to-back direction L) can be longer than the length of the absorbent pad 70 in the front-to-back direction L of the front back region S1 (the length of the front absorbent pad 71 in the front-to-back direction L). According to this design, generally speaking, in the lower back region S2 where bodily fluids are easily generated, the absorbent pad 70 can be arranged over a larger area to absorb bodily fluids. Moreover, in this embodiment, the length of the absorbent pad 70 in the front-to-back direction L of the lower back region S2 is the same as the length of the absorbent pad 70 in the front-to-back direction L of the front back region S1. According to this structure, the effect of absorbing bodily fluids using the absorbent pad 70 can be obtained equally in both the front back region S1 and the lower back region S2.

[0078] (3) Absorbent articles of the modified form

[0079] Next, refer to Figure 5This describes an absorbent article with variations of the first embodiment. Furthermore, in the following description, the same reference numerals are used for structures identical to those in the first embodiment described above, and descriptions are omitted. Figure 5 Therefore Figure 3 The sectional view is a partially enlarged sectional view based on the sectional view. Figure 5 (A) indicates the absorbent article 10X of Modified Example 1. In the absorbent article 10X of Modified Example 1, both the first piece 75 and the second piece 76 constituting the waist piece have folded-back portions. More specifically, the first piece 75 has a non-folded-back portion 751 disposed on the non-skin side T2 of the absorbent body and a folded-back portion 752 folded back towards the skin side T1 based on a crease extending in the width direction W. The second piece 76 has a non-folded-back portion 761 disposed at a position closer to the non-skin side T2 than the non-folded-back portion 751 of the first piece 75 and a folded-back portion 762 folded back towards the skin side T1 based on a crease extending in the width direction W. The folded-back portion 762 of the second piece 76 is located at a position closer to the skin side T1 than the folded-back portion 752 of the first piece 75. The folded-back portion 752 of the first piece 75 and the folded-back portion 762 of the second piece 76 are both located in the second region R12, but not in the first region R11.

[0080] In the first region R11 of the absorbent article 10X of Modification Example 1, a non-folded portion 761 of the second piece 76 and a non-folded portion 751 of the first piece 75 are disposed. The non-folded portion 751 of the first piece 75 is disposed on the skin-side side in the first region R11, and contacts the non-skin-side side of the first waist piece 35 to form the second waist piece 36. The inner edge of the folded portion 762 of the second piece 76 extends to a position inside the front-rear direction L of the inner edge of the folded portion 752 of the first piece 75. The non-folded portion 751 of the first piece 75, the non-folded portion 761 of the second piece 76, and the folded portion 762 of the second piece 76 are disposed in the region between the inner edge of the folded portion 762 of the second piece 76 and the inner edge of the folded portion 752 of the first piece 75 in the front-rear direction L. The region containing the non-folded portion 761 of the second piece 76, the non-folded portion 751 of the first piece 75, and the folded portion 762 of the second piece 76 constitutes the second region R12. Furthermore, the region between the boundary (crease) of the folded portion 752 and the non-folded portion 751 of the first piece 75 in the front-rear direction L and the inner edge of the folded portion 752 of the first piece 75 contains the non-folded portion 761 of the second piece 76, the non-folded portion 751 of the first piece 75, the folded portion 762 of the second piece 76, and the folded portion 752 of the first piece 75. The region containing the non-folded portion 761 of the second piece 76, the non-folded portion 751 of the first piece 75, the folded portion 762 of the second piece 76, and the folded portion 752 of the first piece 75 also constitutes the second region R12. Because the number of waist pieces in the second region R12 increases outward in the front-back direction L, the second region R12 is easier to fit and more easily achieves the effect of suppressing the displacement of absorbent items when the first region R11 deforms.

[0081] Figure 5 (B) indicates the absorbent article 10Y of Modified Example 2. The first piece 75 of the absorbent article 10Y of Modified Example 2 is located on the skin-to-the-side T1, closer to the folded portion 762 of the second piece. Therefore, the first piece 75 is disposed on the skin-to-the-side T1 side in the first region R11, and also on the skin-to-the-side T1 side in the second region R12. The first piece 75 is disposed across the first region R11 and the second region R12. According to this design, the first piece 75 is disposed on the skin-to-the-side side in both the first region R11 and the second region R12, thus air between the wearer and the absorbent article easily flows along the surface of the first piece 75 in the front-back direction L. Therefore, when air flows between the absorbent article and the wearer in the first region R11, this airflow is easily guided towards the second region R12 along the first piece 75. The second zone R12 is located on the side of the waist opening, which facilitates the release of air from the absorbent material to the outside of the absorbent material through the second zone R12.

[0082] Figure 5(C) indicates the absorbent article 10Z of variant example 3. The waist piece of the absorbent article 10Z has an absorbent sheet 70, a first sheet 75, and a second sheet 76. The first sheet 75 has a non-folded portion 751 and a folded portion 752. The second sheet 76 has a non-folded portion 761 and a folded portion 762. The inner edge of the folded portion 752 of the first sheet 75 is located inside the front-rear direction L of the inner edge of the folded portion 762 of the second sheet 76. A second region R12 is provided with a region where the non-folded portion 751 of the first sheet 75, the folded portion 752 of the first sheet 75, the non-folded portion 761 of the second sheet 76, and the folded portion 762 of the second sheet 76 are arranged. In addition, a second region R12 is provided with a region where the non-folded portion 751 of the first sheet 75, the folded portion 752 of the first sheet 75, and the non-folded portion 761 of the second sheet 76 are arranged. In the first region R11, a non-folded portion 751 of the first sheet and a non-folded portion 761 of the second sheet 76 are provided. In the water absorption region R15, a water-absorbing sheet 70, a non-folded portion 751 of the first sheet 75, and a non-folded portion 761 of the second sheet 76 are provided.

[0083] The second sheet 76 is composed of a stretch sheet. This stretch sheet is a sheet that, when its natural length is set to 100, is stretched to 120 or more relative to its natural length. Therefore, the area where the second sheet is disposed stretches in at least one of the front-to-back direction L and the width direction W. The second sheet 76, as a stretch sheet, is disposed across the absorbent area R15, the first area R11, and the second area R12. In addition, a waist elastic member 32 is disposed in the waist area. The waist elastic member 32 is disposed in the second area R12. According to this solution, the stretch sheet and the waist elastic member are disposed in the second area, further conforming to the body. It is possible to make the absorbent area, the first area, and the second area conform to the body as a whole using the stretch sheet, while deforming the first area with the second area as a starting point, further improving the airflow achieved by wrinkling.

[0084] Furthermore, in Modified Example 3, the waist elastic member 32 is disposed in the second region R12, but not in the first region R11 and the absorbent region R15. Therefore, the contraction force in the second region R12 can be increased, and the contraction force in the first region R11 can be decreased. However, in other embodiments, the waist elastic member 32 can be disposed in both the first region R11 and the second region R12, such that the number of waist elastic members in the first region is less than the number of waist elastic members 32 in the second region. Moreover, in other embodiments, the waist elastic member 32 can be disposed in both the first region R11 and the second region R12, such that the elongation ratio of the waist elastic member in the first region is lower than the elongation ratio of the waist elastic member 32 in the second region. According to this other embodiment, the contraction force in the second region R12 can also be increased, and the contraction force in the first region R11 can be decreased.

[0085] The present invention has been described in detail above using the embodiments described above. However, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present invention. In the above embodiments and variations, the second waist piece 36 has a folded-back portion. However, in other embodiments, the second waist piece 36 may not have a folded-back portion. In addition, the waist piece may also have other sheets besides the absorbent sheet 70, the first waist piece 35, and the second waist piece 36.

[0086] In a modified example, the distance between the inner edge of the first region in the front-rear direction and the outer edge of the absorbent region can be 10 mm or less, and preferably 0 mm. Furthermore, in a modified example, the absorbent region can have: a first absorbent region extending from the outer edge of the absorbent region in the front-rear direction inwards, and the absorbent sheet is positioned in the first absorbent region in a manner that allows it to stand upright towards the skin; and a second absorbent region extending from the inner edge of the first absorbent region in the front-rear direction inwards, and the absorbent sheet is positioned in the second absorbent region in a manner that prevents it from standing upright towards the skin. In a modified example, the number of waist-length sheets in the first region is the same as the number of waist-length sheets in the absorbent region. The number of waist-length sheets in the first region can be the same as the number of waist-length sheets in the absorbent region. In a modified example, the length of the first region in the front-rear direction can be 10 mm or more.

[0087] In addition, the entire contents of Japanese Patent Application No. 2023-192511, filed on November 10, 2023, are incorporated herein by reference.

[0088] Industrial availability

[0089] It can provide an absorbent product that can suppress discomfort caused by the absorbent pad when wearing it and suppress adverse conditions such as skin problems and unpleasant feelings.

[0090] Explanation of reference numerals in the attached figures

[0091] 10, 10A, 10B, 10X, 10Y, 10Z: Absorbent material; 32: Elastic waist component; 35: First waist piece; 36: Second waist piece; 40: Absorbent body; 41: Top piece; 42: Bottom piece; 45: Absorbent core; 70: Absorbent sheet (waist piece); 75: First piece (waist piece); 76: Second piece (waist piece); L: Front-back direction; R11: First area; R12: Second area; R15: Absorbent area; S1: Front waist area (waist area); S2: Back waist area (waist area); S3: Crotch area; T: Thickness direction; T1: Skin side; T2: Non-skin side; W: Width direction.

Claims

1. An absorbent article comprising: The front-to-back and width directions are mutually orthogonal; crotch area; The waist area is positioned on the outer side of the crotch area in the front-to-back direction, covering the wearer's waist. An absorbent core, which is at least disposed in the crotch region; as well as Multiple waist-shaped panels are disposed in the waist-shaped area. The waistband has an absorbent pad that comes into contact with the wearer's skin, wherein, The absorbent article has: The water-absorbing area is equipped with the aforementioned water-absorbing sheet; The first region is positioned outward in the front-to-back direction from the water-absorbing region; and The second region is located on the outer side of the first region in the front-back direction; The first region has fewer waist-shaped panels than the absorbent region. The second region has more waist-body pieces than the first region.

2. An absorbent article comprising: The front-to-back and width directions are mutually orthogonal; crotch area; The waist area is positioned on the outer side of the crotch area in the front-to-back direction, covering the wearer's waist. An absorbent core, which is at least disposed in the crotch region; as well as Multiple waist-shaped panels are disposed in the waist-shaped area. The waistband has an absorbent pad that comes into contact with the wearer's skin, wherein, The absorbent article has: The water-absorbing area is equipped with the aforementioned water-absorbing sheet; The first region is positioned outward in the front-to-back direction from the water-absorbing region; and The second region is located on the outer side of the first region in the front-back direction. The waist piece has a first waist piece disposed on the side closest to the skin in the first region and a second waist piece in contact with the non-skin side of the first waist piece. The first waist piece and the second waist piece are not joined in the first region, but are joined in the second region.

3. The absorbent article according to claim 1 or 2, wherein, In the waist region, a plurality of waist elastic members that extend and retract in the width direction are arranged at intervals in the front-to-back direction. A plurality of the waist elastic members are disposed in the first region.

4. The absorbent article according to claim 3, wherein, Multiple waist elastic members are also disposed in the second region. The maximum spacing in the front-to-back direction of the waist elastic member in the first region is longer than the maximum spacing in the front-to-back direction of the waist elastic member in the second region.

5. The absorbent article according to claim 3, wherein, Multiple waist elastic members are also provided in the water-absorbing area. The maximum spacing in the front-to-back direction of the waist elastic member in the first region is longer than the maximum spacing in the front-to-back direction of the waist elastic member in the water-absorbing region.

6. The absorbent article according to claim 1 or 2, wherein, The absorbent area, the first area, and the second area are elastic in the width direction. The shrinkage force in the width direction of the first region is lower than the shrinkage force in the width direction of the water-absorbing region, and also lower than the shrinkage force in the width direction of the second region.

7. The absorbent article according to claim 6, wherein, The shrinkage force in the width direction of the absorbent region is lower than that in the width direction of the second region.

8. The absorbent article according to claim 6, wherein, The shrinkage force in the width direction of the absorbent region is higher than that in the width direction of the second region.

9. The absorbent article according to claim 1 or 2, wherein, The bending stiffness in the front-back direction of the first region is lower than that in the front-back direction of the water-absorbing region, and also lower than that in the front-back direction of the second region.

10. The absorbent article according to claim 1 or 2, wherein, The thickness of the first region is thinner than the thickness of the absorbent region and thinner than the thickness of the second region.

11. The absorbent article according to claim 1 or 2, wherein, The absorbent article comprises an absorbent body having an absorbent core, a liquid-permeable top sheet covering the skin side of the absorbent core, and a liquid-impermeable bottom sheet covering the non-skin side of the absorbent core. In the front-back direction, the outer edge of the absorbent body is located inside the outer edge of the absorbent region and outside the inner edge of the absorbent region.

12. The absorbent article according to claim 1 or 2, wherein, The length of the first region in the front-back direction is longer than at least one of the length of the water-absorbing region in the front-back direction and the length of the second region in the front-back direction.

13. The absorbent article according to claim 1 or 2, wherein, The waist piece, configured in the first region, is arranged across the absorbent region and the second region.

14. The absorbent article according to claim 1 or 2, wherein, The waist piece has a first waist piece disposed on the side closest to the skin in the first region. The first waist piece is also positioned on the side closest to the skin in the second region.

15. The absorbent article according to claim 1 or 2, wherein, The waist area includes a front waist area that rests against the wearer's abdomen and a back waist area that rests against the wearer's back. The absorbent areas are respectively located in the front waist area and the back waist area, and the first area is respectively located in the front waist area and the back waist area. The length of the first region in the rear waist region in the front-back direction is longer than the length of the first region in the front waist region in the front-back direction.

16. The absorbent article according to claim 1 or 2, wherein, The waist panel has a telescopic tab, which is elastic in the width direction. The telescopic sheet is configured across the absorbent area, the first area, and the second area. In the waist region, a plurality of waist elastic members that extend and retract in the width direction are arranged at intervals in the front-to-back direction. The waist elastic member is disposed in the second region.

17. The absorbent article according to claim 1 or 2, wherein, The distance between the inner edge of the first region in the front-back direction and the outer edge of the water-absorbing region is less than 10 mm.

18. The absorbent article according to claim 1 or 2, wherein, The absorbent area has: a first absorbent area extending from the outer edge of the absorbent area in the front-rear direction to the inner side in the front-rear direction, and the absorbent sheet is arranged in the first absorbent area in a manner that allows it to stand upright towards the skin; and a second absorbent area extending from the inner edge of the first absorbent area in the front-rear direction to the inner side in the front-rear direction, and the absorbent sheet is arranged in the second absorbent area in a manner that prevents it from standing upright towards the skin.

19. The absorbent article according to claim 2, wherein, The number of waist-shaped sheets in the first region is the same as the number of waist-shaped sheets in the absorbent region.

20. The absorbent article according to claim 1 or 2, wherein, The length of the first region in the front-back direction is 10 mm or more.

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