Panty-type absorbent article

Abstract

A pant-type absorbent article (1) having an absorbent main body (10) provided with an absorbent core (11), and a waist member (20) provided with a front waist portion (20f) and a back waist portion (20b), the front waist portion (20f) and the back waist portion (20b) being joined to each other by a pair of side joints (5), thereby forming a pair of leg opening portions (LH), wherein the pant-type absorbent article (1) has a crotch elastic member (40) which is stretchable in a longitudinal direction, the back waist portion (20b) has a hip elastic member (26) which is linearly arranged in a left-right direction at a position which is forward of a front side end (5beb) of the side joint (5), and a rear side end (40eb) of the crotch elastic member (40) is positioned forward of the hip elastic member (26) which is arranged at a most forward position of the back waist portion (20b) in the longitudinal direction.

Description

Technical Field

[0001] This invention relates to absorbent articles in the form of underwear. Background Technology

[0002] Previously, it was known that in underwear-type absorbent articles (e.g., underwear-type diapers) that have an absorbent body and a waist member arranged to cover the front and back of the absorbent body from the non-skin side, an elastic member (crotch elastic member) that stretches along the long side of the absorbent body is provided to improve the fit of the absorbent body at the crotch. For example, Patent Document 1 discloses a technology related to diapers (absorbent articles) that has a leg elastic body 7A that stretches along the width direction and a central elastic body 60 (equivalent to the crotch elastic member) that stretches along the long side direction. The contraction of the central elastic body 60 prevents the absorbent body 40 from moving away from the wearer's skin, thereby improving the wearing comfort.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-279612 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] There are several issues with absorbent underwear-type garments that have a crotch elastic member. The elasticity of the crotch elastic member makes it difficult for the leg opening to open fully. For example, there are concerns that when wearing absorbent underwear-type garments, the wearer's legs may get stuck in the leg opening, making it difficult to reliably lift the absorbent body to the crotch area, resulting in insufficient fit at the crotch and leg area.

[0008] The present invention was made in view of the aforementioned problems, and its object is to provide an absorbent underwear-type garment having a crotch elastic member and allowing the legs to pass through the leg openings when worn.

[0009] Solution for solving the problem

[0010] The main invention for achieving the above-mentioned objective is an underwear-type absorbent article that, in its unfolded and extended state, has intersecting long side directions, left-right directions, and thickness directions. It has an absorbent body with an absorbent core and a waist member with a front waist section and a back waist section. The front waist section is located at the front side in the long side direction, and the back waist section is located at the rear side in the long side direction. At both ends in the left-right direction, the front waist section and the back waist section are joined together by a pair of side joints, thereby forming a pair of leg openings. The underwear-type absorbent article is characterized by having a crotch elastic member located on the non-skin side of the absorbent core and stretching along the long side direction. The back waist section has a hip elastic member arranged linearly along the left-right direction, located forward of the front end of the side joints in the long side direction. In the long side direction, the rear end of the crotch elastic member is located forward of the hip elastic member located at the frontmost side of the back waist section.

[0011] Other features of the invention will become clear from the description in this specification and the accompanying drawings.

[0012] The effects of the invention

[0013] According to the present invention, it is possible to provide an absorbent underwear-type article having a crotch elastic member and allowing the legs to pass through the leg openings when worn. Attached Figure Description

[0014] Figure 1 This is a front view obtained by observing the underwear-type disposable diaper 1 from the ventral side.

[0015] Figure 2 This is a top view of the underwear-type disposable diaper 1 in its unfolded and extended state.

[0016] Figure 3 yes Figure 2 A schematic cross-sectional view of the underwear-type disposable diaper 1 at the CC position.

[0017] Figure 4 of Figure 4 A is a top view obtained by observing the absorbent body 10 from the skin side. Figure 4 of Figure 4 B is a schematic cross-sectional view of the central position CL along the long side of the absorbent body 10.

[0018] Figure 5 This diagram illustrates the conventional type of absorbent underwear 5 (diaper 4).

[0019] Figure 6 of Figure 6 A and Figure 6Figure B illustrates the connection between the absorbent body 10 and the waist member 20.

[0020] Figure 7 of Figure 7 A means Figure 6 A schematic cross-sectional view taken from the direction of arrow AA in direction A. Figure 7 of Figure 7 B means Figure 6 A schematic cross-sectional view taken from the direction of arrow A's BB.

[0021] Figure 8 These are the top view and sectional view of the modified diaper 1 in an unfolded and extended state.

[0022] Figure 9 These are three-view drawings illustrating the structure of the diaper 2 according to the second embodiment.

[0023] Figure 10 These are three-view drawings illustrating the structure of the diaper 3 according to the third embodiment. Detailed Implementation

[0024] Based on the description in this specification and the accompanying drawings, at least the following matters are clear.

[0025] (Method 1)

[0026] An absorbent underwear-type garment, in its unfolded and extended state, has intersecting longitudinal, lateral, and thickness directions, and comprises an absorbent body with an absorbent core, and a waist member with a front waist section and a rear waist section. The front waist section is located at the front side in the longitudinal direction, and the rear waist section is located at the rear side in the longitudinal direction. At both ends in the lateral direction, the front waist section and the rear waist section are joined together by a pair of side joints, thereby forming a pair of leg openings. The garment is characterized in that it has a crotch elastic member located on the non-skin side of the absorbent core and stretching along the longitudinal direction. The rear waist section has a hip elastic member arranged linearly along the lateral direction, located in front of the front end of the side joints in the longitudinal direction. In the longitudinal direction, the rear end of the crotch elastic member is located in front of the hip elastic member located at the frontmost side of the rear waist section.

[0027] According to the absorbent underwear of method 1, since the elastic member in the buttocks is arranged in a straight line along the left and right direction, it can prevent the area around the elastic member from protruding to the non-skin side and forming a pocket-like space. Therefore, it can prevent the leg from getting stuck in this pocket-like space when passing through the leg opening. Furthermore, since the crotch elastic member and the elastic member in the buttocks are separate, the elastic member in the buttocks is less likely to be pulled forward when the crotch elastic member contracts. Therefore, the gap between the crotch elastic member and the elastic member in the buttocks is less likely to narrow, and the leg opening is easier to open. Thus, during wearing, it is easier to pass the leg through the leg opening.

[0028] (Method 2)

[0029] In the underwear-type absorbent article described in Method 1, in the long side direction, the central position of the crotch elastic member is located in a position further forward than the central position of the underwear-type absorbent article.

[0030] According to Method 2, the absorbent underwear-type garment contracts via a crotch elastic member located at the front along the long side, causing the fabric forming the waistband in the crotch area to be pulled forward, making it easier for the leg opening to open forward. Therefore, during wearing, the wearer's toes are less likely to get caught in the leg opening, allowing for easier leg passage.

[0031] (Method 3)

[0032] In the underwear-type absorbent articles described in Method 1 or Method 2, the waist member is not provided with an elastic member that bends while moving from one side to the other in the left-right direction.

[0033] According to the absorbent underwear-type garment of method 3, since no elastic member bending in the left-right direction is provided, an area surrounded by both curved and straight elastic members is not formed. Therefore, it can prevent the area surrounded by the elastic member from bulging outwards towards the non-skin side and forming a pouch-like space when the elastic member contracts. Consequently, during wearing, the leg can easily pass through the leg opening.

[0034] (Method 4)

[0035] In any of the methods 1 to 3, the underwear-type absorbent article has a crotch elastic region defined by the crotch elastic member, and in the left-right direction, the width of the crotch elastic region is less than 1 / 2 of the maximum width of the absorbent core.

[0036] According to Method 4, the absorbent core of the underwear-type absorbent article is easier to form a convex shape with good conformability compared to the opposite case. Therefore, the central portion of the convexly shaped absorbent core easily conforms to the wearer's crotch area (excretion opening). Furthermore, by deforming the absorbent core into an isosceles triangle shape with the central portion in the left and right directions as its vertices, the distance in the left and right directions (the length of the base of the isosceles triangle) is shorter compared to the case where it is deformed into a trapezoidal shape. Therefore, the distance between the pair of leg openings is shorter, and the legs are less likely to get stuck in the leg openings during wearing.

[0037] (Method 5)

[0038] In any of the absorbent underwear-type articles described in methods 1 to 4, the width of the crotch elastic region in the left-right direction is less than 1 / 2 of the minimum width of the absorbent core.

[0039] According to the absorbent underwear of method 5, by making the width of the elastic area in the crotch less than 1 / 2 of the minimum width of the absorbent core, the central part of the absorbent core in the left and right directions is more likely to form a convex deformation, the fit of the absorbent core between the wearer's groin area is further improved, and the legs are less likely to get stuck in the leg opening.

[0040] (Method 6)

[0041] In the underwear-type absorbent article described in any of the methods 1 to 5, the absorbent core has a narrowed portion at the center of the longitudinal direction, which is narrower in the left-right direction than at the end of the longitudinal direction, and the crotch elastic member is disposed at a position overlapping the narrowed portion in the longitudinal direction.

[0042] According to the absorbent underwear of method 6, when worn, the absorbent core, in the narrowed portion where it is clamped in the groin area, easily deforms convexly towards the skin. When the legs pass through the leg opening, the left and right edges of the highly rigid absorbent core are less likely to interfere with the wearer's legs (groin area). Therefore, the absorbent core does not feel hard in the wearer's groin area, and the legs are less likely to get stuck on the sides of the absorbent core when passing through the leg opening.

[0043] (Method 7)

[0044] In any of the methods 1 to 6, the absorbent underwear-type garment has a main body joint that joins the absorbent body and the waist member, and the central part of the main body joint in the long side direction and the two ends in the left and right directions have an adhesive-free portion where no adhesive is present.

[0045] According to the absorbent underwear-type garment of method 7, in the area where the adhesive is not present, the width of the main body joint is narrowed, thereby narrowing the gap between the portions (leak-proof wall portions) that rise from the waist member towards the skin on both sides of the absorbent main body. Therefore, when the legs pass through the leg opening during wearing, the leak-proof wall portion is less likely to interfere with leg movement in the inner area (near the groin) in the left-right direction of the crotch. This allows for easy passage of the legs through the leg opening during wearing.

[0046] (Method 8)

[0047] In any of the methods 1 to 7, the absorbent underwear-type article has a portion in the long side direction where the adhesive is absent and a portion of the crotch elastic member overlaps.

[0048] According to Method 8, in the absorbent underwear type, at the location where the absorbent body (absorbent core) deforms convexly based on the elasticity of the crotch elastic member, the width of the main body joint where the absorbent body and the waist member are joined is made as narrow as possible, thereby allowing the absorbent body to easily and naturally form a convex deformation. Furthermore, by causing the absorbent body to deform convexly, a pair of leak-proof walls that stand upright towards the skin at the outer ends in the left and right directions are pulled inwards in the left and right directions, making it easier for the leg openings to open. This allows the legs to easily pass through the leg openings when worn.

[0049] (Method 9)

[0050] In any of the methods 1 to 8, the central position of the portion of the absorbent material in which the adhesive is not present is located in the long side direction, which is further forward than the central position of the absorbent material in the underwear type.

[0051] According to the absorbent underwear of method 9, the gap between the left and right sides of the leak-proof wall is narrowed at the front position of the crotch area, so that when the legs are put through the leg opening during wearing, the toes are less likely to get stuck around the edge of the leg opening. This makes it easier to put the legs through the leg opening during wearing.

[0052] (Method 10)

[0053] In any of the underwear-type absorbent articles described in methods 1 to 9, the portion where the waist member has the narrowest width in the left-right direction overlaps with the crotch elastic member in the long side direction.

[0054] According to the absorbent underwear of method 10, the waistband is narrowest in the left-right direction at the point where the portion of the absorbent body (absorbent core) that convexly deforms towards the skin based on the elasticity of the crotch elastic member overlaps along the long side. Therefore, when the leg passes through the leg opening during wearing, the leg is less likely to get stuck on either side of the convexly deformed absorbent body, and the leg is also less likely to get stuck in the waistband. This makes it easier to pass the leg through the leg opening during wearing.

[0055] (Method 11)

[0056] In the underwear-type absorbent articles described in any of the methods 1 to 10, in the left-right direction, the inner end of the portion where the adhesive is not present is located inside the position where the width of the waist member in the left-right direction is narrowest.

[0057] According to the absorbent underwear-type garment of method 11, a dry edge is formed in the left-right direction at the portion where no adhesive is provided between the narrowest part of the waistband and the outer end of the main body joint (the portion where no adhesive is present). Therefore, compared to the case where the absorbent main body and waistband are joined (the case where no dry edge is formed), the stiffness of the narrowest part of the waistband can be reduced. Consequently, when the legs pass through the leg opening during wearing, the legs are less likely to get stuck in the narrowest part of the waistband.

[0058] (Method 12)

[0059] In the underwear-type absorbent article described in any of the methods 1 to 11, the absorbent body has leg pleat elastic members that extend and retract along the long side at both ends in the left-right direction, and the waist member has a plurality of waist elastic members that extend and retract along the left-right direction. In the long side direction, the front end of the leg pleat elastic member is located in a position further forward than the last waist elastic member among the more than one waist elastic member arranged in the front waist part, and the rear end of the leg pleat elastic member is located in a position further backward than the foremost hip elastic member among the more than one hip elastic member arranged in the rear waist part.

[0060] According to the absorbent underwear of method 12, the leg pleat elastic members provided at the left and right ends of the absorbent body are supported at both ends of the long side by the waist elastic member and the hip elastic member. Therefore, even when the absorbent body absorbs excrement and its weight increases, it can prevent the absorbent body from sagging downwards. This makes it easy for the legs to pass through the leg openings and prevents the absorbent underwear from becoming less comfortable to wear.

[0061] (Method 13)

[0062] In the underwear-type absorbent articles described in any of the methods 1 to 12, in the long side direction, the length of the portion in which the elasticity of the crotch elastic member is applied is less than 1 / 2 of the length of the portion in which the elasticity of the leg pleat elastic member is applied.

[0063] According to the absorbent underwear of method 13, by setting the effective length of the crotch elastic member to less than half the effective length of the leg pleat elastic member, the tendency of the entire absorbent body to shrink along its long side can be suppressed compared to the opposite case. Furthermore, the range of convex deformation of the absorbent body towards the skin can be easily adjusted according to the position of the wearer's excretion opening. Moreover, by allowing only a portion of the absorbent body (absorbent core) to locally convex deform using the elastic force of the crotch elastic member, it is easy for the leg to pass through the leg opening, and a good fit can be achieved at the crotch area.

[0064] (Method 14)

[0065] In any of the underwear-type absorbent articles described in methods 1 to 13, the crotch elastic member is located entirely in a position forward of the center of the underwear-type absorbent article in the long side direction.

[0066] According to the absorbent underwear of method 14, when the elastic member in the crotch contracts, the fabric forming the waistband in the crotch area is more easily pulled forward, and the leg openings easily open forward and backward. Therefore, during wearing, the wearer's toes and heels are less likely to get stuck in the leg openings, making it easier for the legs to pass through.

[0067] ===First Implementation Method===

[0068] Hereinafter, the absorbent underwear of the present invention will be described using the disposable diaper 1 (hereinafter also referred to as "diaper 1") as an example. However, the absorbent underwear of the present invention is not limited to the above-described case, and can also be used as sanitary napkins, menstrual underwear, etc.

[0069] <Basic Structure of Underwear-Type Disposable Diapers 1>

[0070] Figure 1 This is a front view obtained by observing the underwear-type disposable diaper 1 from the ventral side. Figure 2 This is a top view of the underwear-type disposable diaper 1 in its unfolded and extended state. Figure 3 yes Figure 2 A schematic cross-sectional view of the underwear-type disposable diaper 1 at the CC position.

[0071] The unfolded state of the underwear-type disposable diaper 1 (diaper 1) refers to the state in which the diaper 1 is opened and unfolded in a flat manner by separating the pair of side joints 5 located on both sides of the diaper 1. Furthermore, the stretched state of the diaper 1 refers to the state in which the diaper 1 is stretched to the point where the wrinkles of the diaper 1 are no longer visually discernible. Specifically, this means that the diaper 1 is stretched to the point where the dimensions of each component constituting the diaper 1 (e.g., the top sheet 12, inner sheet 23, etc., described later) are the same as or close to the dimensions of a single component.

[0072] like Figure 1 As shown, diaper 1 has mutually orthogonal vertical, horizontal, and front-back directions (in... Figure 1 The design (which runs through the paper) includes a waist opening (BH) and a pair of leg openings (LH). The upper side in the vertical direction corresponds to the waist opening (BH), and the lower side in the vertical direction corresponds to the crotch side. Furthermore, the front side in the front-back direction corresponds to the wearer's abdomen, and the back side in the front-back direction corresponds to the wearer's back.

[0073] In addition, Figure 2 In the unfolded state shown, diaper 1 has intersecting long side directions, left-right directions, and thickness directions (in... Figure 2 (The center is the direction that runs through the paper). Furthermore... Figure 2 The left and right directions in the unfolded state are the same as Figure 1 In the underwear-style state, the left and right directions are the same. Additionally, in the unfolded state, the long side follows the same direction as the up and down direction in the underwear-style state. Furthermore, one side of the long side corresponds to the front (abdomen), and the other side corresponds to the back (back). Also, as... Figure 3 As shown, the direction in which the materials constituting diaper 1 are layered is defined as the thickness direction. The side in the thickness direction that comes into contact with the wearer's skin is defined as the skin side, and the opposite side is defined as the non-skin side.

[0074] The diaper 1 has an absorbent body 10 and an outer member 20 located on the non-skin side of the absorbent body 10. Details will be described later. The absorbent body 10 and the outer member 20 are joined in the thickness direction using an adhesive such as a hot-melt adhesive. Alternatively, covers 31 and 32 may be provided to cover the two ends of the absorbent body 10 along its long side from the skin side (see [reference]). Figure 3 Therefore, it is possible to suppress the edge of the absorbent body 10 from being pressed against the wearer and the opening of the absorbent body 10.

[0075] The outer layer 20 is located at the wearer's waist when the diaper 1 is worn; hereinafter, the outer layer 20 will also be referred to as the "waistline component 20". Additionally, as... Figure 2As shown, in the unfolded and extended state of the diaper 1, the portion of the waist member 20 that is forward (abdominal) from the center position CL along the long side of the diaper 1 is referred to as the "front waist part 20f", and the portion of the waist member 20 that is backward (back) from the center position CL along the long side of the diaper 1 is referred to as the "back waist part 20b". The diaper 1 from Figure 2 The unfolded state shown is achieved by folding the front waist section 20f and the rear waist section 20b, which are opposite each other in the thickness direction (front-back direction), by means of a pair of side joints 5 on both sides in the left-right direction, thus forming... Figure 1 The diaper 1 is an underwear-type diaper as shown. Furthermore, as a joining method based on the side joint 5, examples include joining methods based on heat fusion, ultrasonic welding, and adhesives.

[0076] (Absorbent subject 10)

[0077] Figure 4 A is a top view obtained by observing the absorbent body 10 from the skin side. Figure 4 B is a schematic cross-sectional view at the central position CL along the long side of the absorbent body 10. The absorbent body 10 includes: an absorbent core 11 that absorbs and retains excretory fluids such as urine; a liquid-permeable top sheet 12 (e.g., nonwoven fabric) disposed on the skin side of the absorbent core 11; a liquid-impermeable back sheet 13 (e.g., a resin film such as polyethylene or polypropylene) disposed on the non-skin side of the absorbent core 11; a liquid-permeable middle sheet 15 (e.g., nonwoven fabric) disposed between the top sheet 12 and the absorbent core 11; a pair of side sheets 16; an elastic member cover 17; and leg pleated elastic members 19.

[0078] The absorbent core 11 absorbs and retains excretory fluids such as urine. Alternatively, the surface of the absorbent core 11 may be covered by a liquid-permeable core-covering sheet 18 (e.g., thin cotton paper). The absorbent core 11 is formed by shaping a liquid-absorbing raw material such as water-retaining fibers or highly absorbent polymers (so-called SAP) into a predetermined shape. In this embodiment, for example... Figure 4 As shown in Figure A, it has a roughly hourglass shape, narrowing inwards from the center along its long side towards the left and right. However, the planar shape of the absorbent core 11 is not particularly limited; for example, it can be shaped to appear rectangular when viewed from the side. Furthermore, in this embodiment, the width (maximum width) of the absorbent body 10 in the left and right direction is greater than the width (maximum width) of the absorbent core 11 in the left and right direction.

[0079] A pair of leak-proof wall portions 60 are provided on both sides of the absorbent body 10 in the left-right direction, along the long side direction. For example... Figure 4As shown in Figure B, the portions of the side panel 16 extending from the non-skin-side side of the back panel 13 are bent at multiple points, forming leak-proof wall portions 60 on the skin-side side of the top panel 12. A leak-proof wall elastic member 61 (e.g., elastic band) is installed on the leak-proof wall portion 60 in a state extending along its long side. When the diaper 1 is worn, the leak-proof wall portion 60 can stand upright towards the wearer's skin due to the elasticity of the leak-proof wall elastic member 61, thus blocking excrement.

[0080] Additionally, elastic leg pleats 19 that extend and retract along the long side are provided at both ends of the absorbent body 10 in the left and right directions. The elastic leg pleats 19 are installed, for example, by inserting the elastic band along the thickness direction from both sides of the side panels 16 while the elastic band is extended along the long side. When the diaper 1 is worn, the elastic leg pleats 19 allow the ends of the absorbent body 10 to easily conform to the wearer's leg area, preventing leakage of urine and other excrement.

[0081] Furthermore, the absorbent body 10 has a crotch elastic member 40 that can stretch and extend along its long side at its central portion in the left-right direction and on the non-skin side in the thickness direction, which is closer to the absorbent core 11 than the absorbent core 11. Specifically, in this embodiment, the crotch elastic member 40 is installed between the back sheet 13 and the elastic member cover 17 in a state that extends along the long side in the thickness direction. The back sheet 13 is located on the non-skin side of the absorbent core 11, and the elastic member cover 17 is located on the non-skin side of the back sheet 13. However, the crotch elastic member 40 only needs to be located on the non-skin side of the absorbent core 11. For example, it can also be located on the non-skin side of the absorbent core 11 between the core cover sheet 18 (absorbent core 11) and the back sheet 13.

[0082] exist Figure 4 In A, five crotch elastic members 41 to 45 are arranged at intervals along the long side in the central part of the absorbent body 10 (absorbent core 11) in the left-right direction. Hereinafter, the area defined by these five crotch elastic members 40 (41 to 45) will be referred to as the "crotch elastic area ER". That is, as... Figure 4 As indicated by the diagonal line sloping upwards to the right in section A, the area enclosed by the crotch elastic member 41 located on the far side in the left-right direction and the crotch elastic member 45 located on the far side in the left-right direction is called the crotch elastic region ER. However, the number and arrangement of the crotch elastic members 40 are not limited to this.

[0083] When wearing diaper 1, the elasticity of the crotch elastic member 40 (crotch elastic area ER) allows the central area of ​​the absorbent core 11 in the left-right direction to deform in three dimensions and fit the crotch and excretion opening in a way that protrudes towards the skin, thereby achieving good absorbency and fit.

[0084] (Waist component 20)

[0085] The waist component 20 (external component 20) is a sheet component that narrows inward from the center along its long side to the left and right sides. For example... Figure 2 and Figure 3 As shown, the waist member 20 has an outer abdominal layer 21, an outer dorsal layer 22, an inner layer 23, waist elastic members 24 and 25, and a hip elastic member 26.

[0086] The outer ventral layer 21, the outer dorsal layer 22, and the inner layer 23 can be exemplified as soft sheet materials such as non-woven fabric. The inner layer 23 is a sheet material that forms the shape of the waist member 20 and extends from the front (ventral) side to the rear (dorsal) side in the long side direction. The outer ventral layer 21 is disposed on the non-skin side of the inner layer 23 and is disposed in a portion of the front waist part 20f. The outer ventral layer 21 overlaps with the side joint 5 in the long side direction, and its length in the long side direction is the same as that of the side joint 5 (see reference). Figure 2 The dorsal outer layer 22 is disposed on the non-skin side of the inner layer 23 and in a portion of the lower back 20b. The dorsal outer layer 22 overlaps with the side joint 5 in the long direction and extends downward toward the crotch side of the side joint 5 in a portion. In the unfolded state of the diaper 1, the ventral outer layer 21 and the dorsal outer layer 22 are separated in the long direction, and the inner layer 23 is exposed to the outside as the non-skin side of the diaper 1.

[0087] The waist elastic members 24 and 25 and the hip elastic member 26 are elastic members that stretch and contract in the left-right direction, and examples include elastic bands. Figure 2 As shown, the waist elastic members 24 and 25 overlap with the side joint 5 in the long side direction. Hereinafter, the waist elastic member located in the front waist portion 20f will be referred to as the ventral waist elastic member 24, and the waist elastic member 25 located in the rear waist portion 20b will be referred to as the dorsal waist elastic member 25. The hip elastic member 26 is located on the front side (lower side in the vertical direction) of the side joint 5 in the long side direction. In this embodiment, there are two hip elastic members 26, but this number is not particularly limited.

[0088] In addition, Figure 2In this diaper, the buttock elastic member 26 is cut off at the center in the left-right direction and is arranged without overlapping the absorbent core 11. This prevents the absorbent core 11 from contracting in the left-right direction due to the elasticity of the buttock elastic member 26. Therefore, when wearing the diaper 1, the absorbent core 11 can fit against the wearer's buttocks over a large area, easily achieving good fit and absorbency. However, the buttock elastic member 26 may not necessarily be cut off at the center; it may be continuously arranged from one end in the left-right direction to the other.

[0089] The waist elastic member 24 is arranged vertically between the inner layer 23 and the abdominal outer layer 21 and is installed in an extended state along the left and right directions. The waist elastic member 25 and the hip elastic member 26 are arranged vertically between the inner layer 23 and the back outer layer 22 and are installed in an extended state along the left and right directions. The waist member 20 conforms to the wearer's waist and hips through the stretchability along the left and right directions exhibited by these elastic members 24, 25, and 26. In the diaper 1, the waist elastic members 24 and 25 (and in cases where the hip elastic member 26 is also present) are provided continuously from one end to the other in the left and right directions. Hereinafter, these elastic members 24 and 25 (26) will also be collectively referred to as "left and right direction elastic members".

[0090] <Regarding the actions when putting on diaper 1>

[0091] Typically, when wearing an absorbent underwear-type garment like diaper 1, the following actions are performed: First, the waist opening BH is expanded to the left and right (and forward and backward). Then, one leg is passed through the leg openings LH on both sides one by one. With both legs passed through, the entire absorbent underwear-type garment is lifted from the toe side down to the crotch side, so that the absorbent body fits snugly against the crotch area. However, it is difficult to simultaneously expand the waist opening BH and the pair of leg openings LH fully to allow the legs to pass through, and problems such as the foot getting stuck in the leg openings LH occur during the wearing process. In particular, there is a concern that when the crotch area of ​​the absorbent underwear-type garment has an elastic member equivalent to the crotch elastic member 40, the crotch area is prone to contract along the long side due to the stretching of the elastic member, so the leg openings LH are not fully expanded, and the toes and heels are prone to getting stuck when the legs are passed through.

[0092] In contrast, in the diaper 1 of this embodiment, by giving the crotch elastic member 40, the buttock elastic member 26, and the like a different structure from conventional diapers, the legs can easily pass through the leg opening LH during wearing. The specific structure of the crotch elastic member 40, etc., will be described below.

[0093] Figure 5 This diagram illustrates a conventional type of absorbent underwear 4 (hereinafter also referred to as "diaper 4") as a comparative example. Figure 5 A represents a top view of diaper 4 in its unfolded and stretched state. Figure 5 B indicates the state of the diaper in its underwear-like shape when viewed from one side in the left-right direction.

[0094] The basic structure of the comparative example diaper 4 is largely the same as that of the diaper 1 in the first embodiment. That is, the diaper 4 has an absorbent body 10 and a waist member 20, and has a crotch elastic member 40 that stretches along the long side in the crotch area. However, the arrangement of the crotch elastic member 40 and the structure of the buttock elastic member 26 in the diaper 4 are different from those in the diaper 1. Specifically, the buttock elastic member 26, which is arranged in a straight line from one side to the other in the left-right direction, is not provided in the back waist part 20b of the diaper 4. Instead, a curved elastic member 28 is provided that bends along the periphery of the leg opening LH and moves from one side to the other in the left-right direction (see reference). Figure 5 A). Furthermore, the crotch elastic member 40 of the diaper 4 intersects the waist elastic member 24 on its front side in the long side direction and intersects the bending elastic member 28 on its rear side in the long side direction. Additionally, in Figure 5 In A, the roughly trapezoidal area surrounded by the waist elastic member 25b and the bending elastic member 28 arranged at the foremost side in the long side direction of the rear waist body 20b is designated as the bag area PA.

[0095] When wearing the comparative example diaper 4, as described above, the action is performed to allow the legs to enter from the waist opening BH and pass through the leg opening LH. At this time, as... Figure 5 Thus, in the lower back section 20b, the pocket area PA deforms outward to form a space protruding towards the non-skin side. This is because, in contrast to the contraction of the curved elastic member 28 constituting the periphery (outer contour) of the pocket area PA and the waist elastic member 25b, the fabric (back outer layer 22 and inner layer 23) does not contract in the area inside these elastic members 28 and 25b, causing excess fabric to protrude towards the non-skin side. Consequently, there is a concern that when the wearer attempts to enter through the waist opening BH and exit through the leg opening LH, the leg may easily become stuck in the pocket-shaped space (pocket area PA) protruding towards the non-skin side.

[0096] Furthermore, in the comparative example diaper 4, the crotch elastic member 40 crosses the waist elastic member 24 and the bending elastic member 28 at both ends along the long side. Therefore, due to the stretching force of the crotch elastic member 40, the waist elastic member 24 and the bending elastic member 28 are pulled inward along the long side, and a force is exerted near the crotch area in a direction that narrows the leg opening LH. In particular, the bending elastic member 28 is positioned close to the central position CL (central position in the front-back direction) along the long side, so when the stretching force of the crotch elastic member 40 is applied, the leg opening LH between the central position CL and the bending elastic member 28 also tends to contract. That is, in the back waist portion 20b, the leg opening LH tends to narrow. In this case, there is a concern that when the wearer attempts to enter through the waist opening BH and extend through the leg opening LH, the heel may easily get stuck in the leg opening LH.

[0097] In contrast, in the back waist section 20b of diaper 1, a buttock elastic member 26 is provided in a straight line along the left-right direction, located in front of the front end 5beb of the side joint 5 in the long side direction, without bending. Unlike the diaper 4 of the comparative example, it does not have a curved elastic member 28 (see reference). Figure 2 (etc.). Because the hip elastic member 26 is arranged parallel to the waist elastic member 25, it does not form... Figure 5 The pocket area PA shown in Figure A. That is, the area surrounded by the hip elastic member 26 and the waist elastic member 25 is not formed, and even when the elastic members 26 and 25 are contracted, the fabric (back outer layer 22 and inner layer 23) constituting the back waist part 20b is not easily formed as shown in Figure A. Figure 5 B is a pouch-like space that protrudes towards the non-skin side. Therefore, it can prevent the legs from getting stuck during the wearing action of diaper 1.

[0098] Furthermore, in diaper 1, in the long-side direction, the crotch elastic member 40 is positioned separately from the waist elastic members 24, 25 and the hip elastic member 26 without crossing. In other words, in the long-side direction, the front end 40ef of the crotch elastic member 40 is located further back than the waist elastic member 24 located at the rearmost side of the front waist portion 20f. Similarly, the rear end 40eb of the crotch elastic member 40 is located further forward than the hip elastic member 26 (and waist elastic member 25) located at the frontmost side of the rear waist portion 20b (see reference). Figure 2(etc.). Furthermore, the front end 40ef and rear end 40eb of the crotch elastic member 40 refer to the front and rear ends of the portion (the so-called effective length portion) where the stretching force of the crotch elastic member 40 acts. With such a structure, when the crotch elastic member 40 contracts along its long side, the hip elastic member 26 and the waist elastic member 24 are less likely to be pulled forward or backward. For example, in the lower back portion 20b, when a stretching force based on the crotch elastic member 40 acts in the long side direction, the hip elastic member 26 is also less likely to be pulled forward. Therefore, the gap between the crotch elastic member 40 and the hip elastic member 26 is less likely to shorten, and the leg opening LH is easier to open. Thus, during the wearing action of the diaper 1, the legs can easily pass through the leg opening LH.

[0099] In addition, such as Figure 2 As shown, in the long side direction, the central position C40 of the crotch elastic member 40 is located further forward than the central position CL of the diaper 1. That is, the crotch elastic member 40 is located further forward of the diaper 1 in the long side direction. In this case, by contracting the crotch elastic member 40 located further forward of the diaper 1, the fabric (back outer layer 22 and inner layer 23) forming the waist member 20 in the crotch area can be easily pulled forward, and the leg opening LH can easily open forward. Therefore, during the wearing action of the diaper 1, the wearer's toes are less likely to get stuck in the leg opening LH, and the legs can be passed through more easily.

[0100] Furthermore, in diaper 1, the crotch elastic member 40 is located forward of the central position CL of diaper 1 along its long side. That is, the rear end 40eb of the crotch elastic member 40 is located forward of the central position CL along its long side. Therefore, when the crotch elastic member 40 contracts, the fabric (back outer layer 22 and inner layer 23) forming the waist member 20 in the crotch area is easily pulled forward of the central position CL, and the leg opening LH easily opens forward and backward. Thus, during the wearing action of diaper 1, the wearer's toes and heels are less likely to get stuck in the leg opening LH, making it easier for the legs to pass through.

[0101] Furthermore, diaper 1 does not have an elastic member that bends from one side to the other in a left-right direction. That is, diaper 1 does not have a bending elastic member 28 as in comparative example diaper 4 (see reference). Figure 5 The elastic members in A) are all provided with only left-right elastic members (24, 25, 26) arranged in a straight line along the left-right direction. Therefore, no [something] is formed. Figure 5 A region (bag region PA) surrounded by elastic members (28) that bend in the left-right direction and elastic members (25b) arranged in a straight line, is also not easily formed as... Figure 5As shown in Figure B, there is a pouch-like space that protrudes towards the non-skin side. Therefore, during the wearing of diaper 1, the legs can easily pass through the leg opening LH.

[0102] In addition, preferably, such as Figure 4 As shown, in the lateral direction of diaper 1, the width W40 of the crotch elastic region ER is less than half of the maximum width W11a of the absorbent core 11 (W40 ≤ 1 / 2 × W11a). Assuming the width W40 of the crotch elastic region ER is greater than half the width W11a of the absorbent core 11, there is a concern that the increased width occupied by the crotch elastic region ER in the lateral direction of the absorbent core 11 will result in a poorer fit of the absorbent core 11 when wearing diaper 1. As described above, in diaper 1, the central portion of the absorbent core 11 in the lateral direction is deformed convexly towards the skin based on the elastic force of the crotch elastic region ER, thereby facilitating a close fit to the excretion opening. However, there is a concern that if the width W40 of the crotch elastic region ER is wider, the absorbent core 11 will deform into a trapezoidal shape towards the skin, resulting in a poorer fit relative to the excretion opening.

[0103] In contrast, in diaper 1, by making the width W40 of the elastic area ER in the crotch less than half the width W11a of the absorbent core 11, the absorbent core 11 is more easily shaped into a convex form compared to the opposite case. Therefore, the central portion of the convexly shaped absorbent core 11 in the left-right direction easily fits into the wearer's crotch area (excretion opening). Furthermore, by making the absorbent core 11 easily deform into an isosceles triangle shape with the central portion in the left-right direction as its vertex, the distance in the left-right direction (the length of the base of the isosceles triangle) is shorter compared to the case where it is deformed into a trapezoidal shape. Therefore, the distance between the pair of leg openings LH, LH is shorter, and during the wearing of diaper 1, the legs are less likely to get stuck in the leg openings LH.

[0104] In addition, the absorbent core 11 of the diaper 1 has a narrowed portion 11c in the central part along the long side, which is narrower in the left and right directions compared to the two ends along the long side (see reference). Figure 4 A). By having the narrowed portion 11c, when the diaper 1 is worn, the edges of both ends of the absorbent core 11 are less likely to interfere with the wearer's crotch area and between the legs (groin area), thus improving the fit.

[0105] like Figure 4As shown in Figure A, in the absorbent core 11, the width W11b in the left-right direction is narrowest at a position slightly forward of the central position CL in the long side direction. Furthermore, more preferably, the width W40 of the crotch elastic region ER is less than half of the minimum width W11b of the absorbent core 11 (W40 ≤ 1 / 2 × W11b). By making the width W40 of the crotch elastic region ER less than half of the minimum width W11b of the absorbent core 11, the central portion in the left-right direction of the narrowed portion 11c of the absorbent core 11 can easily convex towards the skin, improving the fit of the absorbent core 11 between the wearer's groin area and preventing the legs from getting stuck in the leg opening LH.

[0106] Additionally, in diaper 1, a crotch elastic member 40 is disposed at a position overlapping the narrowing portion 11c in the long side direction (see reference). Figure 4 A). That is, a crotch elastic member 40 is provided in the portion where the width of the absorbent core 11 narrows in the left-right direction. With this structure, when the diaper 1 is worn, the absorbent core 11 easily deforms convexly towards the skin in the narrowed portion 11c, which is clamped in the groin area of ​​the wearer. Therefore, when the legs pass through the leg opening LH, the edges of the two sides of the highly rigid absorbent core 11 in the left-right direction are less likely to interfere with the wearer's legs (groin area). Thus, the absorbent core 11 does not easily feel hard in the wearer's groin area, and the legs are less likely to get stuck on the sides of the absorbent core 11 when passing through the leg opening LH.

[0107] Figure 6 A and Figure 6 Figure B illustrates the connection between the absorbent body 10 and the waist member 20 (outer member 20). Figure 6 A is a top view of the absorbent main body 10 and waist component 20 in their unfolded and elongated state. Figure 6 B is Figure 6 A schematic cross-sectional view of A.

[0108] The absorbent body 10 and the waist member 20 are joined together by a body joint 70 formed by an adhesive such as a hot melt adhesive. The body joint 70 is located on the non-skin side of the absorbent body 10 or the skin side of the waist member 20. Figure 6 The area represented by the diagonal line sloping upwards to the right of A is formed by applying adhesive. Examples of adhesive application patterns include so-called Ω patterns, spiral patterns, etc.

[0109] Furthermore, adhesive-free portions 75, where no adhesive is present, are provided at the center of the main body joint 70 along its long side and at both ends in the left-right direction. Figure 6In A, a main body joint 70 is formed in a region with a width W70a in the left-right direction, covering almost the entire area of ​​the absorbent main body 10. On the other hand, in a portion having a predetermined length in the front and back directions with a central position CL sandwiched in the long side direction, adhesive-free portions 75 are provided on both sides in the left-right direction. Therefore, in this portion, the width W70b in the left-right direction of the main body joint 70 is narrower than W70a (W70a > W70b). Thus, in the diaper 1, by having a portion near the crotch area where the width (W70b) of the main body joint 70 in the left-right direction is narrowed, a structure is formed that makes it easy for the legs to pass through the leg opening LH when wearing the diaper.

[0110] Figure 7 A means Figure 6 A schematic cross-sectional view taken from the direction of arrow AA in direction A. Figure 7 B means Figure 6 A schematic cross-sectional view viewed in the direction of arrow A's BB. A pair of leak-proof wall portions 60, provided on both sides of the absorbent body 10 in the left-right direction, rise towards the skin in the thickness direction, starting from the two ends of the body joint 70 in the left-right direction. That is, at the boundary between the portion of the side sheet 16 constituting the absorbent body 10 that joins with the waist member 20 via the body joint 70 and the portion that does not join with the waist member 20, the side sheet 16 bends towards the skin, separating from the waist member 20, thereby causing the leak-proof wall portions 60 to rise towards the skin. Therefore, as... Figure 7 Thus, the interval between the upright position of the leak-proof wall portion 60 on one side in the left-right direction and the upright position of the leak-proof wall portion 60 on the other side in the left-right direction is W70a.

[0111] In contrast, Figure 7 In B, with Figure 7 Similarly, in case A, the leak-proof wall portions 60 on both sides in the left and right directions rise towards the skin, but the interval between the rising positions of the leak-proof wall portions 60 on the left and right sides becomes W70b, which is narrower than W70a. This is because, in the area where the adhesive-free portion 75 is formed, the width W70b of the main body joint portion 70 is narrower (see reference). Figure 6 A), therefore, the gap (W70b) between the leak-proof wall portions 60 erected on the left and right sides is also narrowed. As a result, when the legs pass through the leg opening LH during the wearing of the diaper 1, the leak-proof wall portion 60 is less likely to interfere with the movement of the legs near the crotch (groin area). Thus, it is easier to pass the legs through the leg opening LH during wearing.

[0112] Additionally, in the longitudinal direction, a crotch elastic member 40 is disposed in the portion overlapping with the portion 75 where the adhesive is not present (see reference). Figure 6A). In other words, in the long side direction, there is a portion where the adhesive-free portion 75 and the crotch elastic member 40 overlap. This explains that the portion of the absorbent body 10 (absorbent core 11) where the crotch elastic member 40 is located improves fit by convexly deforming towards the skin. At this time, at the position where the absorbent body 10 (absorbent core 11) convexly deforms, the width (W70b) of the body joint 70 that joins the absorbent body 10 and the waist member 20 is made as narrow as possible, thereby allowing the absorbent body 10 (absorbent core 11) to easily and naturally form a convex deformation. Furthermore, by forming a convex deformation in the absorbent body 10, the pair of leak-proof wall portions 60 that stand upright towards the skin at both ends in the left-right direction are pulled inward in the left-right direction, and the leg opening LH also easily opens. Therefore, it is easy for the legs to pass through the leg opening LH when wearing the garment.

[0113] In addition, such as Figure 6 As shown in Figure A, in the longitudinal direction, the central position C75 of the adhesive-free portion 75 is located further forward than the central position CL of the diaper 1. That is, the adhesive-free portion 75 is located further forward of the diaper 1 in the longitudinal direction. Therefore, the spacing (W70b) of the leak-proof wall portions 60 at the forward position of the crotch area is narrower, and the leak-proof wall portions 60 are less likely to interfere with the legs when the legs pass through the leg opening LH while wearing the diaper 1. As a result, it is easier to pass the legs through the leg opening LH.

[0114] Furthermore, in diaper 1, the crotch elastic member 40 is arranged such that it overlaps with the narrowest point of the waist member 20 in the left-right direction along its long side. In other words, the portion of the crotch elastic member 40 that overlaps with the narrowest point of the waist member 20 in the left-right direction along its long side is... Figure 6 In view A, at the position of BB in the direction of the arrow, the waist member 20 is narrowest in the left-right direction, and the crotch elastic member 40 is provided overlapping the position of BB in the direction of the arrow in the long side direction. That is, the position where the absorbent core 11 can easily deform towards the skin by utilizing the elasticity of the crotch elastic member 40 overlaps with the position where the waist member 20 is narrowest in the left-right direction in the long side direction. Therefore, it can be configured such that when the legs pass through the leg opening LH while wearing the diaper 1, the legs are less likely to get stuck at the two ends of the deformed absorbent body 10 (absorbent core 11), and the legs are also less likely to get stuck in the waist member 20. As a result, it is easier to pass the legs through the leg opening LH when wearing the diaper.

[0115] Additionally, in the left-right direction, the inner end of the adhesive-free portion 75 is located further inward than the inner end of the waist member 20 in the left-right direction. Figure 6In section A, in the left-right direction, at the narrowest point of the waist member 20 (position BB in the arrow direction view), the inner end of the adhesive-free portion 75 is located further inward than the inner end of the waist member 20. In other words, in the left-right direction, at the narrowest point of the waist member 20 (position BB in the arrow direction view), the inner end of the waist member 20 is located further outward than the outer end of the main body joint 70. In the left-right direction, a so-called dry edge is formed in the portion where no adhesive is provided between the narrowest part of the waist member 20 and the outer end of the main body joint 70 (i.e., the adhesive-free portion 75). Therefore, compared to the case where the absorbent body 10 and the waist member 20 are joined (i.e., the case where no dry edge is formed), the stiffness at the narrowest part of the waist member 20 can be reduced. As a result, when the legs pass through the leg opening LH when wearing the diaper 1, the legs are less likely to get stuck in the narrowest part of the waist member 20.

[0116] Furthermore, leg pleat elastic members 19 that extend and retract along the long side are provided on both sides of the absorbent body 10 in the left-right direction. Preferably, the range of action of the extension force of these leg pleat elastic members 19 (the so-called effective length range) intersects with at least a portion of the left-right elastic members (waist elastic members 24, 25 and hip elastic member 26) arranged in the left-right direction. Figure 2 In the longitudinal direction, the front end 19ef of the leg pleat elastic member 19 is positioned further forward than the waist elastic member 24b, which is located at the rearmost side in the front waist section 20f, and the two intersect. Similarly, in the longitudinal direction, the rear end 19eb of the leg pleat elastic member 19 is positioned further backward than the hip elastic member 26, which is located at the frontmost side in the rear waist section 20b, and the two intersect. In other words, the leg pleat elastic member 19 has a structure in which the front end is supported by the waist elastic member 24b and the rear end is supported by the hip elastic member 26.

[0117] Normally, when wearing disposable diapers or other underwear-type absorbent items, the absorbent body 10 tends to sag downwards due to increased weight as it absorbs urine and other excrement. In contrast, in the diaper 1, the leg pleat elastic members 19 located on both sides of the absorbent body 10 are supported at their long-side ends (the upper front end and the upper back end in the underwear-type configuration) by the waist elastic member 24 and the hip elastic member 26. Furthermore, by using these leg pleat elastic members 19 to support the sides of the absorbent body 10, the downward sag of the absorbent body 10 can be prevented. This allows the legs to easily pass through the leg opening LH and prevents a loss of fit during use.

[0118] Furthermore, preferably, in the long side direction, the length (effective length) of the portion of the crotch elastic member 40 that is subject to elasticity is less than 1 / 2 of the length (effective length) of the portion of the leg pleat elastic member 19 that is subject to elasticity. Figure 2 In the case where the effective length between the front end 19ef and the rear end 19eb of the part where the stretching force of the leg pleat elastic member 19 is applied is set as L19 and the effective length between the front end 40ef and the rear end 40eb of the part where the stretching force of the crotch elastic member 40 is applied is set as L40, then L40 ≤ 1 / 2 × L19.

[0119] In this way, by setting the effective length L40 of the crotch elastic member 40 to less than half the effective length L19 of the leg pleat elastic member 19, it is easier to suppress the entire absorbent body 10 from shrinking along its long side, compared to the opposite situation. Furthermore, the range of convex deformation of the absorbent core 11 towards the skin can be easily adjusted according to the position of the wearer's excretion opening. Moreover, by locally convex deforming only a portion of the absorbent core 11 using the elastic force of the crotch elastic member 40, it is easier for the leg to pass through the leg opening LH, and a good fit at the crotch area can be achieved.

[0120] (A variation of Diaper 1)

[0121] Diaper 1 can also be deformed as shown below. Figure 8 These are top and cross-sectional views of the modified diaper 1 in its unfolded and extended state. In the modified diaper 1, the arrangement of the multiple crotch elastic members 40 (41-45) constituting the crotch elastic region ER differs from the embodiment described above. Specifically, in the modified diaper 1, the multiple crotch elastic members 40 (41-45) are arranged in the thickness direction at a distance greater than that of the absorbent core 11 (core covering sheet 18, in...) Figure 8 (Not shown in the diagram) The part is on the non-skin side and closer to the skin side than the back piece 13. Additionally, in the modified diaper 1, the elastic member cover 17 is not provided. Other structures are the same as in... Figure 2 The diaper 1 described in the document is the same.

[0122] In this modified diaper 1, a hip elastic member 26 is also provided in the back waist portion 20b, located in front of the front end 5beb in the long side direction of the side joint portion 5, and is arranged in a straight line without bending in the left-right direction. Since the hip elastic member 26 is arranged parallel to the waist elastic member 25, even when the elastic members 26 and 25 are contracted, the fabric constituting the waist portion 20b (back outer layer 22 and inner layer 23) is less likely to form as shown in the image. Figure 5As described in section B, there is a pouch-like space protruding towards the non-skin side. This helps to prevent the leg from getting stuck during wearing.

[0123] Furthermore, in the modified diaper 1, along its long side, the rear end 40eb of the crotch elastic member 40 is positioned further forward than the buttock elastic member 26, which is located at the foremost side in the back waist portion 20b. That is, the crotch elastic member 40 and the buttock elastic member 26 are arranged separately. Therefore, when the crotch elastic member 40 contracts along its long side, the buttock elastic member 26 is less likely to be pulled forward, the gap between the crotch elastic member 40 and the buttock elastic member 26 easily widens, and the leg opening LH easily opens. This allows the legs to easily pass through the leg opening LH.

[0124] ===Second Implementation Method===

[0125] In the second embodiment, an underwear-type diaper 2 (hereinafter also referred to as "diaper 2") with a structure that differs from that in the first embodiment will be described. Figure 9 These are three-view drawings illustrating the structure of the diaper 2 according to the second embodiment.

[0126] The diaper 2 of the second embodiment has an absorbent body 10 for liquid absorption and a waist member 20 disposed on the non-skin side of the absorbent body 10. However, the structure of the waist member 20 in the diaper 2 is different from that of the diaper 1 of the first embodiment. Specifically, in the waist member 20 of the diaper 2, an outer layer 27 is provided on the non-skin side of the inner layer 23. The outer layer 27 is a sheet material that is continuous from one end (front side) to the other end (back side) in the long side direction, and is equivalent to a sheet material member formed by integrating the ventral outer layer 21 and the dorsal outer layer 22 of the diaper 1. The structure other than the outer layer 27 is basically the same as that of the diaper 1.

[0127] In the back waist portion 20b of the diaper 2, a hip elastic member 26 is provided at the front end 5beb in the long side direction of the side joint portion 5, arranged in a straight line without bending in the left-right direction. Because the hip elastic member 26 is arranged parallel to the waist elastic member 25, even when the elastic members 26 and 25 are contracted, the fabric (outer layer 27 and inner layer 23) constituting the back waist portion 20b is less likely to form as shown in the image. Figure 5 As described in section B, there is a pouch-like space protruding towards the non-skin side. This helps to prevent the leg from getting stuck during wearing.

[0128] Furthermore, along the long side of the diaper 2, the rear end 40eb of the crotch elastic member 40 is positioned further forward than the buttock elastic member 26, which is located at the foremost side in the back waist section 20b. That is, the crotch elastic member 40 and the buttock elastic member 26 are arranged separately. Therefore, when the crotch elastic member 40 contracts along its long side, the buttock elastic member 26 is less likely to be pulled forward, the gap between the crotch elastic member 40 and the buttock elastic member 26 easily widens, and the leg opening LH easily opens. This allows the legs to easily pass through the leg opening LH.

[0129] ===Third Implementation Method===

[0130] In the third embodiment, an underwear-type diaper 3 (hereinafter also referred to as "diaper 3") with a structure that differs from that of the first and second embodiments will be described. Figure 10 These are three-view drawings illustrating the structure of the diaper 3 according to the third embodiment.

[0131] The diaper 3 of the third embodiment has an absorbent body 10 for liquid absorption and a waist member 20 disposed on the non-skin side of the absorbent body 10. However, in the diaper 3, the waist member 20 is divided into a front side (abdominal side) and a back side (dorsal side), and is composed of two members: a front waist part 20f and a back waist part 20b. That is, the diaper 3 is a panty-type absorbent article with a three-piece structure as follows: the front waist part 20f and the back waist part 20b are arranged at intervals along their long sides, and the absorbent body 10 is disposed between the front waist part 20f and the back waist part 20b.

[0132] In the absorbent body 10 of diaper 3, such as Figure 10 As shown in the D3-D3 cross-sectional view, a plurality of crotch elastic members 40 are provided on the skin side of the back sheet 13, which is closer to the non-skin side of the absorbent core 11 in the thickness direction and extends along the long side. The crotch elastic region ER is defined by these plurality of crotch elastic members 40. In addition, the side sheet 16 continues from one side to the other in the left-right direction (see reference). Figure 10 (D3-D3 sectional view), the left and right leak-proof wall portions 60 are formed by a side piece 16. Apart from this, the structure is roughly the same as the structure of the absorbent body 10 of the diaper 1.

[0133] Furthermore, the front waist section 20f of the diaper 3 has an outer abdominal layer 21, an inner abdominal layer 23f located on the skin side of the outer abdominal layer 21 and having a shape substantially the same as the outer abdominal layer 21, and a plurality of waist elastic members 24 located between the outer abdominal layer 21 and the inner abdominal layer 23f. Similarly, the back waist section 20b of the diaper 3 has a back outer layer 22, an inner back layer 23b located on the skin side of the back outer layer 22 and having a shape substantially the same as the back outer layer 22, and a plurality of waist elastic members 25 and a hip elastic member 26 located between the back outer layer 22 and the back inner back layer 23b.

[0134] In the back waist section 20b of the diaper 3, a hip elastic member 26 is provided at the front end 5beb of the side joint 5 along the long side direction, arranged in a straight line without bending in the left-right direction. Because the hip elastic member 26 is arranged parallel to the waist elastic member 25, even when the elastic members 26 and 25 are contracted, it is not easy to form a shape like in... Figure 5 As described in section B, there is a pouch-like space protruding towards the non-skin side. This helps to prevent the leg from getting stuck during wearing.

[0135] Furthermore, along the long side of the diaper 3, the rear end 40eb of the crotch elastic member 40 is positioned further forward than the buttock elastic member 26, which is located at the foremost side in the back waist section 20b. That is, the crotch elastic member 40 and the buttock elastic member 26 are arranged separately. Therefore, when the crotch elastic member 40 contracts along its long side, the buttock elastic member 26 is less likely to be pulled forward, the gap between the crotch elastic member 40 and the buttock elastic member 26 easily widens, and the leg opening LH easily opens. This allows the legs to easily pass through the leg opening LH.

[0136] ===Others===

[0137] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the scope of the invention. It is self-evident that the present invention can be modified and altered without departing from its spirit, and that the present invention includes its equivalents.

[0138] Explanation of reference numerals in the attached figures

[0139] 1. Diaper (First embodiment, panty-type disposable diaper, panty-type absorbent article); 2. Diaper (Second embodiment); 3. Diaper (Third embodiment); 4. Diaper (Comparative example); 5. Side joint; 5feb, rear end (long side direction); 5beb, front end (long side direction); 10. Absorbent body; 11. Absorbent core; 11c, narrowing part; 12. Top sheet; 13. Back sheet; 15. Middle sheet; 16. Side sheet; 17. Elastic member cover sheet; 18. Core covering sheet; 19. Leg pleat elastic member; 20. Waist member (outer member); 20f, front waist section; 20b, rear waist section; 21. Abdominal outer layer sheet; 22. Outer back panel; 23. Inner panel; 23f. Inner ventral panel; 23b. Inner back panel; 24. Waist elastic member (ventral); 25. Waist elastic member (back); 26. Hip elastic member; 27. Outer panel; 28. Bending elastic member; 31. Cover panel; 32. Cover panel; 40. Crotch elastic member; 40ef. Front end; 40eb. Rear end; 41-45. Crotch elastic member; 60. Leak-proof wall section; 61. Leak-proof wall elastic member; 70. Main body joint; 75. Adhesive-free area; BH. Waist opening; LH. Leg opening; CL. Central position (long side direction); ER. Crotch elastic area.

Claims

1. An absorbent underwear-type garment, which, in its unfolded and extended state, has intersecting longitudinal, lateral, and thickness directions, and comprises an absorbent body with an absorbent core, and a waist member having a front waist portion and a back waist portion, wherein the front waist portion is located at the front side in the longitudinal direction, the back waist portion is located at the rear side in the longitudinal direction, and the front waist portion and the back waist portion are joined together at their two ends in the lateral direction by a pair of side joints, thereby forming a pair of leg openings, characterized in that... The absorbent underwear has a crotch elastic member located on the non-skin side of the absorbent core and stretching along the long side. The lower back portion has a hip elastic member arranged in a straight line along the left-right direction, located in front of the front end of the side joint in the long side direction. In the long side direction, the rear end of the crotch elastic member is located further forward than the hip elastic member which is positioned at the foremost side of the lower back.

2. The absorbent underwear-type garment according to claim 1, characterized in that, In the long side direction, the central position of the crotch elastic member is located further forward than the central position of the underwear-type absorbent article.

3. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, The waist member is not provided with an elastic member that bends from one side to the other in the left-right direction.

4. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, The underwear-type absorbent article has an elastic crotch area defined by the crotch elastic member. In the left-right direction, the width of the crotch elastic region is less than 1 / 2 of the maximum width of the absorbent core.

5. The absorbent underwear-type garment according to claim 4, characterized in that, In the left-right direction, the width of the crotch elastic region is less than 1 / 2 of the minimum width of the absorbent core.

6. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, The absorbent core has a narrowed portion at its central portion in the long side direction, which is narrower in the left-right direction compared to the end portion in the long side direction. The crotch elastic member is positioned at a location that overlaps with the narrowing portion in the long side direction.

7. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, The absorbent underwear-type garment has a main body joint that joins the absorbent body and the waistband component. The central portion along the long side of the main body joint and the two ends along the left and right sides have adhesive-free portions where no adhesive is present.

8. The absorbent underwear-type article according to claim 7, characterized in that, Along the long side, there is a portion where the adhesive is absent and a portion where the crotch elastic member overlaps.

9. The absorbent underwear-type garment according to claim 7, characterized in that, In the long side direction, the central position of the non-adhesive portion is located forward of the central position of the underwear-type absorbent article.

10. The absorbent underwear-type article according to claim 7, characterized in that, The portion of the waist member that overlaps with the groin elastic member in the left-right direction at the position where the waist member is narrowest.

11. The absorbent underwear-type article according to claim 10, characterized in that, In the left-right direction, the inner end of the portion where the adhesive is not present is located inside the position where the width of the waist member in the left-right direction is narrowest.

12. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, The absorbent body has two end portions in the left-right direction with leg pleated elastic members that extend and retract along the long side direction. The waist component has multiple elastic waist components that extend and retract along the left-right direction. In the direction of the long side, The front end of the leg pleat elastic member is located further forward than the last of the more than one waist elastic member disposed in the front waist section. The rear end of the leg pleat elastic member is located further back than the foremost of the hip elastic members among the more than one hip elastic member disposed in the lower back.

13. The absorbent underwear-type article according to claim 12, characterized in that, In the long side direction, the length of the portion of the crotch elastic member that is subject to stretching is less than 1 / 2 of the length of the portion of the leg pleat elastic member that is subject to stretching.

14. The absorbent underwear-type garment according to claim 1 or 2, characterized in that, Along the long side, the crotch elastic member is positioned forward of the center of the underwear-type absorbent article.

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