Underpants-type absorbent article

Abstract

An underpants-type absorbent article (1) is provided with an absorbent main body (10), a waist member (20) laminated on the non-skin side of the absorbent main body (10), and a pair of separation parts (25) for separating the waist member (20) into a front body sheet (20f) and a rear body sheet (20b). At least one pair of locking portions (32) is provided on both side portions in the left-right direction of one of the front body sheet (20f) and the rear body sheet (20b), each of the locking portions (32) being removably locked to a predetermined region of the other of the front body sheet (20f) and the rear body sheet (20b). The other of the front body sheet (20f) and the rear body sheet (20b) has an expansion and contraction region (20EA) that is expandable and contractible in the left-right direction at a position corresponding to the center of the lock part (32) in the vertical direction.

Description

[0001] This application is a divisional application of the application filed on June 29, 2021, with national application number 202180040427.2 (international application number PCT / JP2021 / 024572) and invention title "underwear-type absorbent article". Technical Field

[0002] This invention relates to an absorbent underwear-type product. Background Technology

[0003] Traditionally, absorbent articles such as disposable diapers are known to have a portion of their waistband structure cut off in an underwear-like (shorts-like) shape, allowing them to also be used as belt-type (unfolding) diapers. For example, Patent Document 1 discloses an underwear-type diaper that can be opened in a double-door manner by providing a pair of break guide lines on the ventral side of the outer body and cutting along the break guide lines. This underwear-type diaper is a dual-purpose disposable diaper, which can also be used as a belt-type diaper by using a fastening strap that is pulled out after opening.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2010-131197 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] In dual-purpose disposable diapers such as those described in Patent Document 1, there is a risk of deteriorated fit when the diaper is used as a belt diaper by cutting a portion of the outer body from its pant-like state. For example, even if the waistband of the diaper has excellent fit when used as a pant-like diaper, the fit around the waist is insufficient when used as a belt diaper compared to when it is used as a pant-like diaper. This leads to the risk of diaper misalignment or leakage.

[0009] The present invention was made in view of the above-mentioned problems, and the object of the present invention is to achieve excellent fit of underwear-type absorbent articles that can also be used as belt-type absorbent articles.

[0010] Solution for solving the problem

[0011] A key aspect of the invention for achieving the above-mentioned objectives is an underwear-type absorbent article having intersecting vertical, horizontal, and front-back directions. The underwear-type absorbent article includes: an absorbent body; a waistband member configured to be stacked on the non-skin side of the absorbent body; a pair of separating portions for separating the waistband member into a front panel and a back panel; at least one pair of locking portions disposed on either side of the front panel and the back panel in the horizontal direction; each of the pair of locking portions being removably locked to a predetermined area of ​​the other of the front panel and the other of the back panel; and the other of the front panel and the other of the back panel including a telescopic region at the central position of the locking portion in the vertical direction, the telescopic region being a region capable of telescopically extending along the horizontal direction.

[0012] Other features of the invention will become clear from the description of this specification in conjunction with the accompanying drawings.

[0013] The effects of the invention

[0014] According to the present invention, excellent fit can be achieved in underwear-type absorbent articles that can also be used as belt-type absorbent articles. Attached Figure Description

[0015] [ Figure 1 ] Figure 1 This is a schematic perspective view of diaper 1 according to the first embodiment.

[0016] [ Figure 2 ] Figure 2 This is a plan view of the diaper 1 in its unfolded and elongated state, as seen from the skin side in the thickness direction.

[0017] [ Figure 3 ] Figure 3 It is along Figure 2 A schematic cross-sectional view of line AA in the diagram.

[0018] [ Figure 4 ] Figure 4 A and Figure 4 B is a diagram illustrating the operation of separating the waist component 20 of the diaper 1 into the front waist component 20f and the back waist component 20b.

[0019] [ Figure 5 ] Figure 5 This is an unfolded plan view of the diaper 1 with the front waist component 20f and the back waist component 20b separated from each other.

[0020] [ Figure 6 ] Figure 6 This is a plan view showing the state in which the diaper 1, which is in a belt-like state, is reshaped into an underwear-like state and stretched.

[0021] [ Figure 7 ] Figure 7 This is a plan view of the diaper 2 in its unfolded and elongated state, as seen from the skin side in the thickness direction. Detailed Implementation

[0022] From the description in this specification and the accompanying drawings, at least the following will become clear.

[0023] An absorbent underwear-type article having intersecting vertical, horizontal, and front-back directions, the absorbent underwear-type article comprising: an absorbent body; a waistband member configured to be stacked on the non-skin side of the absorbent body; a pair of separating portions for separating the waistband member into a front panel and a back panel; at least a pair of locking portions disposed on the horizontal sides of either the front panel or the back panel, each of the pair of locking portions being removably locked to a predetermined area of ​​the other of the front panel and the other of the back panel, and the other of the front panel and the back panel including a telescopic region at the central position of the locking portion in the vertical direction, the telescopic region being a region capable of telescopically extending along the horizontal direction.

[0024] According to the aforementioned underwear-type absorbent article, a lateral contraction force is applied to the area between the locking parts in the waistband member (front panel) where a pair of locking parts are locked. That is, in the waistband opening where the front and back panels are connected in a ring-like manner by the pair of locking parts, pulling the locking parts inward in the lateral direction makes the waistband opening easier to contract. Therefore, excellent fit can be achieved regardless of whether the absorbent article is used in underwear-type or belt-type form.

[0025] In such an absorbent underwear-type article, it is desirable that the absorbent body includes an absorbent elastic member that stretches and contracts along the length of the absorbent body.

[0026] According to the aforementioned absorbent underwear-type garment, during use, the elastic component of the absorbent body contracts towards the wearer's skin and pulls the absorbent body upward, thereby improving fit and absorbency in the crotch area. Specifically, it enhances the fit of the absorbent body to the wearer's crotch area, while also improving the fit of the waistband component to the wearer's waist. Therefore, this enhances the overall fit of the absorbent garment.

[0027] In such an underwear-type absorbent article, it is desirable that a plurality of the absorbent elastic members are arranged at predetermined intervals in the left-right direction, and that the left-right width of the stretchable area is greater than the left-right distance between the absorbent elastic member disposed at the outermost position on one side in the left-right direction and the absorbent elastic member disposed at the outermost position on the other side in the left-right direction.

[0028] According to the aforementioned underwear-type absorbent article, in the left-right direction, the range of the contractile force applied to the front panel by the stretchable area becomes wider than the range of the contractile force applied to the absorbent body by the absorbent elastic member. This makes the contractile force exhibited by the stretchable area more effective at resisting the tensile force exhibited by the absorbent elastic member. Therefore, even if the absorbent body is pulled downward by the contractile force of the absorbent elastic member, the front panel is difficult to pull downward. This allows for easy maintenance of excellent fit.

[0029] In such underwear-type absorbent articles, it is desirable that the absorbent body includes an absorbent core containing a superabsorbent polymer, and that the width of the stretchable region in the left-right direction is greater than the width of the absorbent core in the left-right direction.

[0030] According to the aforementioned underwear-type absorbent article, the range of contraction force applied due to the stretching area in the left-right direction is greater than the width of the absorbent core. Therefore, even if the absorbent core is pulled downward by the contraction force of the absorbent elastic member, the front panel is difficult to pull downward. This makes it easier to maintain an excellent fit.

[0031] In such an absorbent underwear-type garment, it is desirable that the width of the stretchable area in the left-right direction is greater than the width of the absorbent body in the left-right direction.

[0032] According to the aforementioned underwear-type absorbent article, the range of contraction force applied due to the stretching area in the left-right direction is greater than the width of the absorbent body. Therefore, even if the absorbent body is pulled downward by the contraction force of the absorbent elastic member, the front panel is difficult to pull downward. This makes it easier to maintain an excellent fit.

[0033] In such an absorbent underwear-type garment, it is desirable that, in the vertical direction, the upper front end of the absorbent elastic member is located below the lower end of the stretchable region.

[0034] According to the aforementioned absorbent underwear-type garment, the area where the contractile force exerted by the elastic member of the absorbent body is applied does not overlap with the stretchable area. Therefore, the contractile force exerted by the elastic member of the absorbent body is less likely to be applied to the stretchable area. This makes it less prone to bending or other deformation in the front panel. Consequently, when the locking part is locked to the front panel, the surface of the front panel is more likely to remain flat, making it easier to securely lock the locking part. This further enhances the fit around the waist.

[0035] In such an underwear-type absorbent article, it is desirable that, in the vertical direction, the upper front end of the absorbent elastic member is located below the lower end of the separation portion.

[0036] According to the aforementioned underwear-type absorbent article, the area where the contractile force exerted by the absorbent elastic member is applied does not overlap with the area between the pair of separating parts. Therefore, the contractile force exerted by the absorbent elastic member is not easily applied to the area between the pair of separating parts. This makes it less likely for deflection or the like to occur in the area between the separating parts of the front panel. Therefore, in an absorbent article in an underwear-type state, this makes it easier for the separating parts to separate.

[0037] In such an absorbent underwear-type garment, it is desirable that the absorbent underwear-type garment also includes a pair of side joints at one of the two ends in the left-right direction, each of the pair of side joints being a part that joins the front panel and the back panel together, and that the locking part is located on the outer side of the absorbent elastic member in the left-right direction and the inner side of the side joint in the left-right direction when the locking part is locked to the waist member.

[0038] According to the aforementioned underwear-type absorbent article, the contractile force exhibited by the absorbent elastic member is less affected in the region located on the outer side of the absorbent elastic member in the left-right direction and on the inner side of the side joint in the left-right direction. Therefore, locking the locking part to this region makes it easier and more stable to lock the locking part. This further improves the fit of the waistband member to the wearer's waist.

[0039] In such an underwear-type absorbent article, it is desirable to have a portion in which the two ends of the absorbent body in the left-right direction and the stretchable area overlap each other with respect to the up-down direction.

[0040] According to this underwear-type absorbent garment, the left and right ends of the absorbent body are easily pulled outwards by the stretchable area. That is, a force is applied to unfold the absorbent body, making it easier to suppress leakage of excrement and preventing the absorbent body from standing up from the wearer's body. Therefore, this enhances the fit of the absorbent body during use.

[0041] In such an underwear-type absorbent article, it is desirable that, in the unfolded and extended state, the contractile force in the left-right direction of the stretchable region in the portion where the stretchable region overlaps with the absorbent body when viewed along the thickness direction is less than the contractile force in the left-right direction of the stretchable region in the portion where the stretchable region does not overlap with the absorbent body when viewed along the thickness direction.

[0042] According to the aforementioned absorbent underwear-type garments, excessive contractile force is less likely to be applied to the portion overlapping the absorbent body along its thickness, thus suppressing any undulations in the absorbent body. Therefore, this makes it easier for the absorbent body to conform to the wearer's skin, ensuring a comfortable fit throughout the waistline.

[0043] In such an underwear-type absorbent article, it is desirable to have a low stretch region with a stretchability lower than that of the stretch region, and the low stretch region is disposed on the outer side of the stretch region in the left-right direction.

[0044] According to the aforementioned underwear-type absorbent article, in the area where the waistband has a low-elasticity zone and is located outside the elasticity zone, wrinkles are less likely to form on the surface of the waistband, making it easier to ensure the shape retention of the sheet member constituting the waistband. This makes it easier to smoothly perform the operation of unlocking the locking part locked to the periphery of the low-elasticity zone from the waistband.

[0045] In such an underwear-type absorbent article, it is desirable that at least a portion of the low-stretch area is disposed on the outer side of the stretch area in the left-right direction, and disposed at a position that overlaps with the stretch area in the up-down direction.

[0046] According to the aforementioned underwear-type absorbent article, low-stretch areas are provided on both sides of the stretch area, which makes it easier to unlock the locking part that is locked to the area overlapping with the low-stretch area from the waist member.

[0047] In such an underwear-type absorbent article, it is desirable that the width of the stretchable area in the left-right direction is greater than the width of the low-stretchable area in the left-right direction.

[0048] According to this type of absorbent underwear, the lateral width of the stretchable area is greater than that of the low-stretch area, making it easier to provide sufficient stretch to the waistband. Therefore, the waistband more easily contracts in the lateral area between the pair of locking parts, further enhancing the fit around the wearer's waist.

[0049] In such absorbent underwear-type articles, it is desirable that the entire locking portion overlaps with the stretchable area relative to the vertical direction.

[0050] According to the above-mentioned underwear-type absorbent article, the contraction force exhibited by the stretchable area is applied to the entire locking part in the vertical direction, which makes the waist member easy to be pulled inward in the left and right direction through the locking part, thereby enhancing the fit of the waist opening.

[0051] In such an underwear-type absorbent article, it is desirable that the absorbent body includes an absorbent core containing a superabsorbent polymer, and that in the vertical direction, the lower end of the locking portion is located above the upper end of the absorbent core.

[0052] According to the aforementioned underwear-type absorbent article, the highly rigid absorbent core does not overlap with the locking part in the vertical direction. Therefore, in the area between a pair of locking parts, the absorbent core's obstruction of the stretchable area is suppressed. This makes it easy to maintain an excellent fit of the waistband.

[0053] In such an absorbent underwear-type article, it is desirable that the absorbent underwear-type article also includes a tab having the locking portion, a tab engagement portion being provided on the outer side of the locking portion in the left-right direction, the tab engagement portion being the portion that engages the tab to the waist member, and the locking portion being provided with either a hook member or a ring member in a hook-and-loop fastener.

[0054] According to the aforementioned underwear-type absorbent article, the user can easily lock the locking part onto or unlock it from the waistband by grasping the tab. Furthermore, the locking part is provided with a hook or ring member for locking, which allows the locking part to be repeatedly attached to and removed from the surface of the waistband. Therefore, this makes it easy to adjust the locking position during locking.

[0055] In such an absorbent underwear-type garment, it is desirable that the absorbent underwear-type garment also includes a pair of side joints at one of the two ends in the left-right direction, each of the pair of side joints being a portion that joins the front panel and the back panel together, wherein the tab joint is provided at any position from the outer end of the absorbent body to the side joint in the left-right direction, and the separating portion is disposed between the tab joint and the locking portion in the left-right direction.

[0056] According to the aforementioned underwear-type absorbent article, when the user separates the separation section, it can be easily separated by grasping the protrusion with one hand and the waistband member with the other hand, and pulling these members in opposite directions. Therefore, this makes it easy to remove the absorbent article from the wearer's body or to transform the absorbent article from an underwear-type absorbent article into a belt-type absorbent article.

[0057] In such an underwear-type absorbent article, it is desirable that the back panel includes a leg elastic member that is capable of stretching and contracting along the lower edge of the back panel in the left-right direction.

[0058] The aforementioned absorbent underwear-type garment incorporates elasticity along the leg openings, allowing for a more secure fit around the wearer's legs. Specifically, in the back panel, the leg openings can easily separate from the buttocks or shift position due to the protrusion of the wearer's buttocks. Therefore, the inclusion of elastic leg support elements improves the fit of the back panel around the legs and reduces discomfort for the wearer.

[0059] In such an absorbent underwear-type article, it is desirable that the absorbent body includes an absorbent elastic member that stretches and contracts along the length of the absorbent body, and that the stress in the left-right direction of the stretching region is greater than the stress in the up-down direction of the region where the absorbent elastic member is disposed.

[0060] According to the aforementioned absorbent underwear-type garment, the stress in the stretchable area is greater than the stress in the elastic member of the absorbent body. Therefore, when resisting the force of the elastic member pulling downwards on the upper end of the absorbent body, the waistband is less likely to shift position. This makes it easy to maintain a close fit between the waistband and the wearer's waist.

[0061] In such an underwear-type absorbent article, it is desirable that the other of the front and back panels includes the stretchable area in the entire portion between the upper and lower ends of the locking portion in the vertical direction and between the inner ends of the pair of locking portions in the horizontal direction.

[0062] According to the aforementioned absorbent underwear-type garment, the entire rectangular area sandwiched between a pair of left and right locking parts narrows in the left-right direction, making it easier for the left and right ends of the back panel to be pulled inward through the pair of locking parts. Therefore, the waist opening narrows and becomes easier to fit along the wearer's waist, making positional shifts less likely.

[0063] In such an absorbent underwear-type article, it is desirable that the absorbent body includes an absorbent elastic member that stretches along the length direction of the absorbent body, and that in the length direction, the length of the absorbent elastic member relative to the rear portion of the central position is longer than the length of the absorbent elastic member relative to the front portion of the central position.

[0064] According to the aforementioned absorbent underwear, the contractile force exerted by the elastic member of the absorbent body is applied to the wearer's buttocks, making it easier for the absorbent body to fit securely into the seam of the buttocks. Therefore, this further enhances the fit of the absorbent underwear and suppresses leakage of excretory fluids such as menstrual blood.

[0065] In such an absorbent underwear-type garment, it is desirable that the back panel includes a tab, the locking portion is disposed in the tab, and in the vertical direction, the upper rear end of the absorbent elastic member is located above the lower end of the tab.

[0066] According to the aforementioned absorbent underwear-type garment, when the wearer grips the tab and pulls it left and right to lock it against the front waistband, the upper rear end of the absorbent elastic member is pulled in the left and right direction. This makes the rear area of ​​the absorbent body less likely to slide downwards, and due to the contractile force of the absorbent elastic member, the absorbent body more easily conforms to the groove of the wearer's buttocks.

[0067] In such an absorbent underwear-type article, it is desirable that the absorbent underwear-type article further includes: a front leg elastic member extending along a lower end edge located in the vertical direction of the front body piece; and a rear leg elastic member extending along a lower end edge located in the vertical direction of the rear body piece, wherein the length of the front leg elastic member in the left-right direction is shorter than the length of the rear leg elastic member in the left-right direction.

[0068] According to the aforementioned absorbent underwear-type garment, areas are provided at both ends of the front waistband member in the left and right directions where no contractile force is applied as exhibited by the elastic member of the front leg, making the front waistband member less prone to contraction. Therefore, by grasping the edges formed at the ends of the front waistband member in the left and right directions, it is easy to perform the operation of locking the tabs provided on the back waistband member. Thus, it is easier to put on the absorbent underwear-type garment, allowing it to easily conform to the body.

[0069] In such an underwear-type absorbent article, it is desirable that, in the vertical direction, the upper end of the elastic member of the front leg is located below the lower end of the locking part.

[0070] According to the aforementioned absorbent underwear-type garment, in the front waistband component, the contractile force exhibited by the elastic member of the front leg is less likely to be applied to the area where the locking part is locked, which makes it easier to perform the operation of the locking tab. In addition, the elasticity of the front leg is less likely to be interfered with by the locking part, so in the front waistband component, the leg opening is more likely to fit the wearer's groin.

[0071] In such absorbent underwear-type articles, it is desirable to provide a functional material in a predetermined area of ​​at least either the absorbent body or the waistband, the functional material comprising at least one of a cooling agent, a warming agent, and a fragrance.

[0072] The aforementioned absorbent underwear-type garments can provide the wearer with cooling or warming effects.

[0073] ===First Implementation Method===

[0074] As an example of an underwear-type (shorts-shaped) absorbent article according to the first embodiment of the present invention, underwear-type diaper 1 (hereinafter also simply referred to as "diaper 1") will be described. It should be noted that underwear-type absorbent articles also include underwear-type diapers, underwear-type absorbent pads, etc.

[0075] <Basic Structure of Diaper 1>

[0076] Figure 1 This is a schematic perspective view of diaper 1 according to the first embodiment. Figure 2 This is a plan view of the diaper 1 in its unfolded and elongated state, as seen from the skin side in the thickness direction. Figure 3 It is along Figure 2 A schematic cross-sectional view of line AA in the diagram.

[0077] It should be noted that the “stretched state” of diaper 1 refers to the state in which the entire diaper 1 (the whole product) is stretched without wrinkles by stretching the various elastic components included in diaper 1 (e.g., absorbent elastic component 50, skin side panels 22 and 23, etc., described later). Specifically, diaper 1 is stretched such that the dimensions of the constituent components of diaper 1 (e.g., non-skin side panels 21, skin side panels 22 and 23, etc., described later) are the same as or close to the dimensions of the components themselves.

[0078] like Figure 1 As shown, diaper 1 has mutually orthogonal "vertical", "left-right", and "front-back" directions. Furthermore, as... Figure 3 As shown, the diaper 1 has components stacked on top of each other in a "thickness direction". In the vertical direction, when the wearer is wearing the diaper 1, the side corresponding to the wearer's waist is the "upper side", and the side corresponding to the wearer's crotch is the "lower side". In addition, in the front-back direction, when the diaper is in use, the side corresponding to the wearer's abdomen is the "front side", and the side corresponding to the wearer's back is the "back side". Furthermore, in the thickness direction, when the wearer is wearing the diaper 1, the side in contact with the wearer's skin is the "skin side", and the opposite side is the "non-skin side".

[0079] In addition, Figure 2 In the unfolded state shown, diaper 1 has a "vertical" and a "horizontal" orientation that are orthogonal to each other. The "vertical" orientation is along the vertical direction in the panty-like state, and the "horizontal" orientation is along the horizontal direction in the panty-like state.

[0080] The diaper 1 of this embodiment includes: a liquid-absorbing absorbent body 10 that absorbs excretory fluids such as menstrual blood; a waist member 20 that is configured to be stacked on the non-skin side of the absorbent body 10 and disposed around the wearer's waist during use of the diaper 1; and tabs 30 that are disposed on both sides of the waist member 20 in the left-right direction.

[0081] (Absorbent subject 10)

[0082] like Figure 2 As shown, the absorbent body 10 is approximately rectangular in shape in the plan view, wherein the longitudinal direction (corresponding to the "length direction" of the absorbent body 10 in its extended state) extends along the vertical direction of the diaper 1. Furthermore, as... Figure 3 As shown, the absorbent body 10 includes: an absorbent core 11 extending longitudinally (vertically); a front sheet 12 disposed on the skin side relative to the absorbent core 11; and a back sheet 13 disposed on the non-skin side relative to the absorbent core 11. However, the absorbent body 10 may include other sheet members. For example, a second sheet (not shown) may be disposed between the front sheet 12 and the absorbent core 11 in the thickness direction. Furthermore, an absorbent elastic member 50, which will be described later, is disposed between the absorbent core 11 and the back sheet 13.

[0083] The absorbent core 11 is a component that absorbs and retains liquids such as menstrual blood, and is formed of liquid-absorbent fibers (e.g., pulp fibers) mixed with, for example, a superabsorbent polymer (SAP). It should be noted that the outer peripheral surface of the absorbent core 11 may be covered with a liquid-permeable sheet component (core wrapping sheet), such as a tissue paper or nonwoven sheet.

[0084] The front sheet 12 is a liquid-permeable sheet component that can come into contact with the wearer's skin during diaper use, and is formed, for example, from a hydrophilic, breathable nonwoven sheet or a spunbond nonwoven sheet.

[0085] The back sheet 13 is formed with a two-layer structure, including: a liquid-impermeable sheet 13a, which is used to prevent leakage of liquids such as menstrual blood absorbed by the absorbent core 11 to the outside; and a hydrophobic sheet 13b, which is disposed on the non-skin side of the liquid-impermeable sheet 13a. The liquid-impermeable sheet 13a may be, for example, a resin film, while the hydrophobic sheet 13b may be, for example, a flexible nonwoven fabric sheet. However, it is not necessary to provide the hydrophobic sheet 13b, and the back sheet 13 may be constructed with only the liquid-impermeable sheet 13a.

[0086] Furthermore, leak-proof wall portions (not shown) may be provided on both sides of the absorbent body 10 in the left-right direction. The leak-proof wall portions correspond to the so-called three-dimensional pleats. During the use of the diaper 1, the leak-proof wall portions stand upright from both sides of the absorbent body 10 toward the wearer's skin, thereby preventing the leakage of excretory fluids such as menstrual blood to the outside of the absorbent body 10.

[0087] In addition, such as Figure 2 and Figure 3 As shown, in the absorbent body 10 of this embodiment, a plurality of absorbent elastic members 50 that extend and contract along the longitudinal direction (vertical direction) are provided. Each absorbent elastic member 50 is formed of, for example, elastic wire, and is configured on the non-skin side relative to the absorbent core 11 (in... Figure 3 In this embodiment, the diaper 1 extends longitudinally (vertically) between the back sheet 13 and the absorbent core 11. Five absorbent elastic members 50 are provided at predetermined intervals in the left-right direction (see [reference]). Figure 2 The elongation ratio of the absorbent elastic member 50 is preferably approximately 1.4 to 3.3 times. It should be noted that the elongation ratio is represented by a value obtained by dividing the length of the elastic member in its elongated state by the length of the elastic member in its natural state. Setting the elongation ratio of the absorbent elastic member 50 to a certain degree of strength allows the relatively rigid absorbent body 10 to easily contract from the non-skin side in the thickness direction, and this allows the absorbent body 10 to conform to the wearer's body during use of the diaper 1. That is, due to the elasticity exhibited by the absorbent elastic member 50, the absorbent body 10 is pulled upwards towards the wearer's skin side, thus easily making close contact with the wearer's crotch area, making it difficult for excretory fluids such as menstrual blood to leak.

[0088] (Waist component 20)

[0089] The waist component 20 is an outer body composed of multiple sheet components, and the waist component 20 includes at least a non-skin side sheet 21 and skin side sheets 22 and 23 (see Figure 3 Furthermore, in the following description, the portion of the waist member 20 located longitudinally on the front (ventral) side relative to the longitudinal center position CL is referred to as the front waist member 20f, and the portion of the waist member 20 located rearly (back) relative to the longitudinal center position CL is also referred to as the back waist member 20b. The front waist member 20f is the portion that contacts the ventral side of the wearer's body during the use of the diaper 1 and corresponds to the "front panel" of the diaper 1. The back waist member 20b is the portion that contacts the back side of the wearer's body during the use of the diaper 1 and corresponds to the "back panel" of the diaper 1.

[0090] The non-skin side piece 21 is a non-stretchable sheet member disposed at the non-skin side of the diaper 1, and is formed, for example, of spunbond nonwoven fabric, SMS nonwoven fabric, etc. In this embodiment, as... Figure 2 As shown in the plan view, the non-skin side piece 21 has a shape that narrows inward in the left-right direction in the longitudinal central portion (including the portion at the central position CL).

[0091] The skin side sheet 22 is a stretchable sheet member that is laminated longitudinally on the skin side of the non-skin side sheet 21. The skin side sheet 22 is formed, for example, from a stretchable nonwoven fabric sheet. "Stretchable nonwoven fabric" is a nonwoven fabric containing stretchable fibers with elasticity and elongated fibers with a shrinkage capacity lower than that of the stretchable fibers. The stretchable nonwoven fabric is made through a suitable stretching treatment, such as gear stretching. For the skin side sheet 22 of this embodiment, polyurethane-based elastomer fibers, which are elastic thermoplastic elastomers, can be used as stretchable fibers, and polypropylene (PP) fibers, which are non-elastic thermoplastic resins, can be used as elongated fibers.

[0092] The skin side panel 22 is joined to the non-skin side panel 21 via distributed panel joints (not shown), thus giving the front waist member 20f elasticity at least in the left-right direction. In this embodiment, the panel joints are all formed using known joining methods (such as ultrasonic welding).

[0093] The skin side panel 23 is a stretchable sheet member laminated longitudinally on the skin side of the non-skin side panel 21. The skin side panel 23 has the same construction as the skin side panel 22. That is, the skin side panel 23 is formed of a stretchable nonwoven fabric sheet and is joined to the non-skin side panel 21 by distributed sheet joints (not shown). Therefore, the back waist member 20b is given stretchability in at least the lateral direction.

[0094] It should be noted that, as sheet members constituting the waist member 20, other sheet members besides the skin side sheet 21 and skin side sheets 22 and 23 can be provided. For example, the waist member 20 may have a three-layer structure, wherein a non-stretchable nonwoven sheet is disposed on the skin side of the stretchable skin side sheets 22 and 23, and a stretchable nonwoven sheet is sandwiched between the non-stretchable nonwoven sheets.

[0095] In Figure 2 The diaper 1 shown in the unfolded state is folded once longitudinally (front-to-back direction) at the fold position, which is the longitudinal center position CL (in the fold position). Figure 2(shown as dashed lines), so that the skin-side surfaces of the front waist member 20f (front body piece) and the rear waist member 20b (rear body piece) face each other. In the folded state, the two lateral (left-right direction) ends 40f and 40f of the front waist member 20f overlap with the two lateral (left-right direction) ends 40b and 40b of the rear waist member 20b in the front-back direction, and these ends are joined using a known joining method (such as sealing weld), thereby forming a side joint 40. Therefore, in the folded waist members 20 (20f and 20b), the front (abdominal) and rear (back) sides are connected in a ring manner, and the pant-type diaper 1 is formed with Figure 1 The figure shows a waist opening 1a and a pair of leg openings 1b.

[0096] (Plate 30)

[0097] A pair of tabs 30 are disposed on both sides of the diaper 1 in the left-right direction. Each tab 30 includes a base 31 and a locking part 32.

[0098] The substrate 31 is a sheet member formed from a nonwoven fabric sheet or the like. The substrate 31 is joined to the waist member 20 on one side in the left-right direction via a tab joint 35, and has a locking part 32 on the other side in the left-right direction (see...). Figure 2 In this embodiment, the side joint 40 of the waist member 20 also serves as the tab joint 35. That is, the front waist member 20f, the rear waist member 20b, and the tab 30 are integrally joined by the side joint 40. However, the tab joint 35 can be provided separately from the side joint 40. For example, in the front waist member 20f or the rear waist member 20b, it is acceptable for the tab 30 to be joined to a predetermined area outside the side joint 40 by the tab joint 35. Furthermore, the tab joint 35 can be formed in the same manner as the side joint 40 by ultrasonic welding or the like, or it can be formed using an adhesive such as a hot melt adhesive.

[0099] The locking part 32 is a locking member for detachably locking the tab 30 to the waist member 20, and is provided in a predetermined area on the skin-side surface of the tab 30 (the area opposite to the tab engagement part 35 in the left-right direction). In this embodiment, the locking part 32 is, for example, a hook-and-loop fastener formed of polypropylene and having a plurality of hook members (locking protrusions, not shown) for locking on its skin-side surface. These locking protrusions hook onto the fibers (loops) of a nonwoven fabric sheet that constitutes the outermost non-skin-side piece 21 of the waist member 20, thereby detachably locking the locking part 32 (tab 30) to the non-skin-side surface of the waist member 20. However, a configuration in which the hook members for locking are located on the waist member 20 side and the loop members to which the hook members are to hook are located on the locking part 32 side is also acceptable.

[0100] like Figure 1 As shown, in the diaper 1 in the underwear-type state, the locking part 32 of the tab 30 is locked to the front waist member 20f in the region located inside the tab joint 35 (side joint 40) in the left and right direction.

[0101] <Procedure for putting on and taking off diapers 1>

[0102] Next, the procedure for putting on and taking off diaper 1 will be explained. In its initial state, diaper 1 is in the following position... Figure 1 The diaper is shown in a panty-like (shorts-like) state and can be worn as a regular panty-like absorbent item. Furthermore, when removing the diaper 1 from the body, the waist member 20, which forms a ring along the wearer's waist, can be removed by separating the waist member 20 into a front waist member 20f and a back waist member 20b and opening the diaper 1.

[0103] Figure 4 A and Figure 4 B is a diagram illustrating the operation of separating the waist component 20 of the diaper 1 into the front waist component 20f and the back waist component 20b. Figure 4 A is a schematic cross-sectional view showing the diaper 1 in its underwear-like position as seen from above (from the waist opening 1a side) in the vertical direction. Figure 4 B shows the separation of the front waist member 20f and the rear waist member 20b. Figure 4 A schematic cross-sectional view of diaper 1 in A.

[0104] In the diaper 1 in its underwear-like configuration, the front waistband member 20f and the back waistband member 20b are joined together in the side joints 40 and 40 located at the two ends in the left and right directions, thereby forming a shape as shown in the figure. Figure 4 A shows the annular waist opening 1a. In addition, a pair of tabs 30 are provided on both sides of the waist member 20 in the left and right directions, and the tabs 30 are locked to the non-skin side surface of the front waist member 20f by the locking part 32.

[0105] In addition, Figure 4 In A, a pair of separating portions 25 are provided on both sides of the front waist member 20f in the left-right direction. Each separating portion 25 is configured to separate the waist member 20, which is formed as a ring along the wearer's waist, into a front waist member 20f and a back waist member 20b. The separating portion 25 is located somewhere in the left-right direction region from the side joint 40 to the portion locked by the locking portion 32. Figure 4 In A, in the left-right direction, in the region between the side engagement portion 40 and the locking portion 32, the separating portion 25 is provided closer to the side engagement portion 40 than the locking portion 32. This separating portion 25 is, for example, a perforation extending in the vertical direction (see...). Figure 2Furthermore, by tearing the waist member 20 along the perforation, the waist member 20 can be easily separated into a front waist member 20f and a rear waist member 20b.

[0106] It should be noted that in diaper 1, the side joint 40 is formed by ultrasonic welding, therefore, the rigidity of the side joint 40 is higher than that of the rest of the waist member 20. Therefore, the waist member 20 can be torn open along the inner end of the side joint 40 where the rigidity difference is greater. In this case, since the inner end of the side joint 40 acts as a separating part 25, it is unnecessary to provide perforations or the like.

[0107] Furthermore, to facilitate separation, the separation section 25 can be formed by pre-connecting the front waist member 20f and the rear waist member 20b in a separable manner. For example, the waist member 20 can be made separable such that a portion of the front waist member 20f and a portion of the rear waist member 20b are stacked in the thickness direction, and the stacked portion is weakly glued or connected by hooks. Alternatively, the waist member 20 can be made separable such that the front waist member 20f and the rear waist member 20b are connected by a predetermined connecting member, and the connecting member can be removed from the connecting side.

[0108] Alternatively, the following configuration is also acceptable: when the engagement of the tab joint 35 (side joint 40) and the base plate 31 is maintained by partially weakly bonding the front waist member 20f and the base plate 31 of the tab 30 to each other, the front waist member 20f and the base plate 31 can be easily separated in the separation part 25.

[0109] The diaper 1, in which the waist component 20 is separated into the front waist component 20f and the rear waist component 20b in the separation section 25, is in a position where the waist component 20 is separated into the front waist component 20f and the rear waist component 20b. Figure 4 The state shown in B. That is, Figure 4 The separation portion 25 in A is separated into a separation end 25fe on the front waist member 20f side and a separation end 25be on the rear waist member 20b side, cutting off the front waist member 20f and the rear waist member 20b in the front-rear direction. Furthermore, in Figure 4 In section B, a pair of tabs 30 and 30 are engaged with the rear waist member 20b via tab engagement portions 35 (side engagement portions 40) on both sides in the left-right direction, and the respective locking portions 32 and 32 provided on the tabs 30 and 30 are locked to the front waist member 20f. Therefore, the waist member 20 is formed as a ring. When the diaper 1 in this state is removed from the wearer's body, the diaper 1 can be easily removed by releasing the locking portion 32 from the front waist member 20f and opening the diaper 1.

[0110] Figure 5This is an unfolded plan view of the diaper 1 with the front waist member 20f and the back waist member 20b separated from each other. The separated diaper 1 can be used as a so-called belt-type diaper, including the locking tabs 30 of which are provided on both sides of the back waist member 20b (back piece) in the left and right directions. That is, the diaper 1 of this embodiment can be used as both an underwear-type diaper and a belt-type diaper.

[0111] Traditional pant-style diapers offer excellent fit, but they are difficult to put on and take off frequently, especially in bathrooms or similar places. For example, when removing a diaper after use and putting on a new one while out, one needs to insert their toes into the leg openings of the pant-style diaper and pull it up to the crotch. Therefore, there is a problem that in environments where the wearer cannot easily remove their pants or shoes, it is difficult to put on and take off the diaper.

[0112] Conversely, according to the diaper 1 of this embodiment, the waist member 20 is separated by the separation part 25, making it easy to remove the diaper 1. Furthermore, by pre-separating the waist member 20 of the new diaper 1 by the separation part 25 and setting the diaper 1 to an unfolded state, the diaper 1 can be used as a belt-type diaper, which makes it easy to put on and take off the diaper even in environments where it is difficult for the wearer to take off their pants or shoes.

[0113] Furthermore, in the diaper 1 of this embodiment, even when the diaper 1 is used as a belt-type diaper, it can achieve excellent fit similar to that of an underwear-type diaper. Figure 6 This is a plan view showing the state in which the diaper 1, which is in a belt-like state, is reshaped into an underwear-like state and stretched. Figure 6 It shows Figure 5 The diaper 1 shown in the unfolded and elongated state is folded once at the central position CL in the longitudinal (length direction), and a pair of locking parts 32 and 32 are locked to the front waist member 20f (front piece), forming an underwear-type state.

[0114] In diaper 1, the front waist member 20f can extend and retract in the left and right directions due to the elasticity of the skin side panels 22, which are elastic in the left and right direction. Therefore, when the pair of locking parts 32 and 32 are as Figure 6 When locked to the front waist member 20f (front body piece), the area located between the locking portions 32 and 32 in the left-right direction extends and retracts in the left-right direction. The front waist member 20f in the locked state includes at least a retractable area 20EA (made of…). Figure 6 (The diagonal part in the text indicates that the telescopic area 20EA can extend and retract in the left and right directions at the central position 32C in the vertical direction of the locking part 32.)

[0115] That is, in the front waist member 20f (front body piece), when the locking parts 32 and 32 are locked, a lateral contraction force is applied to the area between the locking parts 32 and 32. Therefore, the left and right ends of the rear waist member 20b are pulled inwards by the pair of locking parts 32 and 32, making it easier for the annular waist opening 1a formed by the front waist member 20f and the rear waist member 20b to contract. That is, Figure 4 The contractile force indicated by the arrow in B is applied to the front waist member 20f, and the waist opening 1a contracts. Therefore, the waist opening 1a fits snugly along the wearer's waist, making it less prone to positional shifts. Thus, even if the diaper 1 is used in either the panty-type or belt-type form, excellent fit can be achieved.

[0116] Furthermore, the absorbent body 10 of the diaper 1 is provided with an absorbent elastic member 50 that stretches along its length (longitudinal direction). As described above, during use of the diaper 1, the absorbent elastic member 50 contracts and pulls the absorbent body 10 upward toward the wearer's skin, which improves the fit and absorbency of the crotch area. That is, in this embodiment, due to the stretchability of the absorbent elastic member 50, the fit of the absorbent body 10 to the wearer's crotch area is enhanced, and at the same time, due to the stretchability of the stretchable area 20EA, the fit of the waist member 20 to the wearer's waist area is enhanced. Therefore, this enhances the overall fit of the diaper 1.

[0117] Furthermore, the lateral width W20EA of the telescopic region 20EA provided in the front waist member 20f is greater than the lateral width W50 of the absorbent elastic member 50 provided in the absorbent body 10 (see...). Figure 6 Here, as Figure 6 As shown, the lateral width W50 of the plurality of absorbent elastic members 50 is represented by the distance between the absorbent elastic member 50 located on the far left-right side (e.g., the left side) and the absorbent elastic member 50 located on the far right-left side (e.g., the right side). In this configuration, in the lateral direction, the range of the contractile force exerted by the stretchable region 20EA on the front waist member 20f is greater than the range of the contractile force exerted by the absorbent elastic members 50 on the absorbent body 10. Therefore, even if the upper end of the absorbent body 10 is pulled downward by the contractile force of the absorbent elastic members 50, the contractile force exerted by the stretchable region 20EA can more easily resist the tensile force exerted by the absorbent elastic members 50, making it less likely for the front waist member 20f to be pulled downward. Therefore, it is easier to maintain the excellent fit of the diaper 1.

[0118] Furthermore, the lateral width W20EA of the telescopic region 20EA is greater than the lateral width W11 of the absorbent core 11 (the maximum width of the absorbent core 11) (see [reference]). Figure 6 That is, in the left-right direction, the range of the contractile force exerted by the stretchable region 20EA is greater than the width of the absorbent core 11. Therefore, even if the contractile force of the absorbent elastic member 50 pulls the absorbent core 11 downwards in the left-right direction, the front waist member 20f is not easily pulled downwards because the contractile force exerted by the stretchable region 20EA more easily resists the tensile force exerted by the absorbent core 11. Therefore, it is easier to further maintain the excellent fit of the diaper 1.

[0119] Furthermore, the lateral width W20EA of the stretchable region 20EA is greater than the lateral width W10 of the absorbent body 10 (see [reference]). Figure 6 That is, in the left-right direction, the range of the contractile force exerted by the stretchable region 20EA is greater than the maximum width of the absorbent body 10. Therefore, even if the contractile force of the absorbent elastic member 50 pulls the absorbent body 10 downward in the left-right direction, the front waist member 20f is not easily pulled downward because the contractile force exerted by the stretchable region 20EA more easily resists the pulling force exerted by the absorbent body 10. Therefore, it is easier to maintain the excellent fit of the diaper 1.

[0120] In addition, such as Figure 6 As shown, in the vertical direction, the upper end 50et of the front (ventral) side of the absorbent elastic member 50 is located below the lower end 20EAeb of the stretchable region 20EA. That is, the area where the contractile force exerted by the absorbent elastic member 50 is applied does not overlap with the stretchable region 20EA, so the contractile force exerted by the absorbent elastic member 50 is not easily applied to the stretchable region 20EA. In this configuration, the contractile force exerted by the absorbent elastic member 50 is less likely to interfere with the stretchable region 20EA, making it less likely for deflection or other deformation to occur in the front waist member 20f. Therefore, when the locking part 32 is locked to the front waist member 20f during use of the diaper 1 in a belt-like state, the front waist member 20f is easily kept flat, making it easier to securely lock the locking part 32. Therefore, this further enhances the fit of the diaper 1 to the wearer's waist.

[0121] In addition, such as Figure 6As shown, in the vertical direction, the upper end 50et of the front (ventral) side of the absorbent elastic member 50 is located below the lower end 25eb of the separating portion 25 (the separating end 25fe of the front waist member 20f). That is, the area where the contractile force exerted by the absorbent elastic member 50 is applied does not overlap with the area between the pair of separating portions 25 and 25, so the contractile force exerted by the absorbent elastic member 50 is not easily applied to the area between the separating portions 25 and 25. In such a configuration, the contractile force exerted by the absorbent elastic member 50 is less likely to interfere, making it less likely for deflection or the like to occur in the area between the separating portions 25 and 25 of the front waist member 20f. Therefore, in the diaper 1 in an underwear-type configuration, it is easier to separate the separating portion 25 (thereby separating the front waist member 20f and the back waist member 20b). For example, if the separating portion 25 is perforated, the perforation can be stably broken. Therefore, this makes it easy to put on and take off the diaper 1 when going out or other situations.

[0122] Furthermore, it is desirable that, when the locking part 32 is locked to the waist member 20, the locking part 32 is positioned in a region located outside the absorber elastic member 50 in the left-right direction and inside the side joint 40 of the waist member 20 in the left-right direction. Figure 6 As shown, the locking part 32 is locked to the inner region in the left-right direction of the waist member 20 (front waist member 20f). If the locking part 32 is locked to the region overlapping with the absorbent elastic member 50 in the left-right direction, this region may be pulled downwards due to the contractile force of the absorbent elastic member 50. Therefore, there is a possibility that the locking operation may be difficult to perform stably. Conversely, if the locking part 32 is locked to the region located outside the absorbent elastic member 50 in the left-right direction and inside the side joint 40 in the left-right direction, the contractile force exhibited by the absorbent elastic member 50 is less likely to affect this region, making it easier and more secure to lock the locking part 32. Therefore, this allows for further improvement in the fit of the waist member 20 to the wearer's waist.

[0123] Furthermore, it is desirable that the left and right ends 10s of the absorbent body 10 overlap with the stretchable region 20EA. In other words, it is desirable that at least a portion of the two ends 10s of the absorbent body 10 overlaps with the stretchable region 20EA in the vertical direction. In this configuration, due to the stretchability of the stretchable region 20EA, the left and right ends 10s of the absorbent body 10 can be easily pulled outward in the left and right directions. That is, a force is applied to expand the absorbent body 10, which makes it easier to suppress leakage of excrement and makes it less likely for the absorbent body 10 to stand up from the wearer's body, allowing the absorbent body 10 to more easily come into close contact with the wearer's skin. Therefore, this allows for further enhancement of the fit of the absorbent body 10 during the use of the diaper 1.

[0124] Furthermore, it is desirable that the entire locking portion 32 overlaps with the telescopic region 20EA in the vertical direction. In this configuration, the contractile force exhibited by the telescopic region 20EA is applied to the locking portion 32 as a whole in the vertical direction, which makes it easy to pull the back waist member 20b inward in the left-right direction by means of the pair of locking portions 32 and 32, thereby further improving the fit of the waist opening 1a to the wearer's waist. In this embodiment, as Figure 6 As shown, the locking part 32 overlaps with the stretchable area 20EA in the vertical direction, thus ensuring a good fit to the wearer's waist during the use of the diaper 1.

[0125] Furthermore, it is desirable that, in the vertical direction, the lower end 32eb of the locking part 32 is located above the upper end 11et of the absorbent core 11. In other words, it is desirable that the locking part 32 and the absorbent core 11 do not overlap with each other in the vertical direction. Since the absorbent core 11 contains superabsorbent polymer (SAP) and the like, the rigidity of the absorbent core 11 is higher than that of the waist member 20. Therefore, assuming that the absorbent core 11 is present between the pair of locking parts 32 and 32 locked to the waist member 20, there is a risk that the lateral expansion and contraction of the stretching area 20EA will be hindered by the rigidity of the absorbent core 11, making it difficult for the contraction force to act between the pair of locking parts 32 and 32. In this case, the contraction force of the waist opening 1a is weakened, resulting in a deterioration in the fit to the wearer's waist. Conversely, in the diaper 1, as Figure 6 As shown, the lower end 32eb of the locking part 32 is positioned above the upper end 11et of the absorbent core 11 in the vertical direction. This prevents the absorbent core 11 from hindering the expansion and contraction of the telescopic region 20EA in the area between the locking parts 32 and 32. Therefore, this makes it easy to maintain the excellent fit of the waist member 20.

[0126] Furthermore, it is expected that, in situations such as Figure 6In the diaper 1 shown in its unfolded and stretched state, the lateral contraction force of the stretchable region 20EA in the portion overlapping with the absorbent body 10, viewed along the thickness direction, is less than the lateral contraction force of the stretchable region 20EA in the portion not overlapping with the absorbent body 10, viewed along the thickness direction. In the waistband 20, if excessive contraction force is applied to the area overlapping with the absorbent body 10 in the thickness direction, the highly rigid absorbent body 10 undulates, risking that the diaper will not easily conform to the wearer's body. Therefore, in the area of ​​the stretchable region 20EA overlapping with the absorbent body 10, by, for example, cutting a portion of the skin side pieces 22 and 23 (stretchable nonwoven fabric), the lateral contraction force is made less than the lateral contraction force in the area not overlapping with the absorbent body 10. This suppresses excessive contraction force being applied to the absorbent body 10, making it easier to maintain a fit around the entire waist. It should be noted that the magnitude of the lateral contraction force of the stretchable region 20EA refers to the magnitude of the force exerted when the target area in the stretchable region 20EA is stretched by a unit length in the lateral direction.

[0127] Furthermore, in the diaper 1 of this embodiment, the tab 30 with locking portion 32 is engaged to the waist member 20 on the left and right sides of the locking portion 32 via the tab engagement portion 35. Therefore, the user (wearer) of the diaper 1 can easily lock or unlock the locking portion 32 to the waist member 20 by grasping the portion of the tab 30 where the locking portion 32 is provided. Moreover, each locking portion 32 is provided with a hook member for locking or a ring member for hooking the hook member, which allows for repeated attachment and removal of the locking portion from the non-skin side surface of the waist member 20. Therefore, it allows for easy adjustment of the locking position during operation of locking the locking portion 32. With these constructions, the front waist member 20f and the back waist member 20b can be easily connected or adjusted, making it easier for the waist opening 1a to fit snugly around the user's (wearer's) waist.

[0128] Furthermore, in the left-right direction, the tab-joint portion 35 is provided at any position from the outer end of the absorbent body 10 to the side joint portion 40 of the waist member 20. The separating portion 25 is disposed in the area between the tab-joint portion 35 and the locking portion 32 in both the left and right directions. In the diaper 1 of this embodiment, as... Figure 4 As shown, the tab engagement portion 35 is located at the same position as the side engagement portion 40, and the separation portion 25 is disposed between the tab engagement portion 35 and the locking portion 32 in both the left and right directions. Therefore, when the user separates the separation portion 25, the individual separation portions 25 can be easily separated by grasping the tab 30 with one hand and the waist member 20 (front waist member 20f) with the other hand, and pulling in opposite directions. For example, in Figure 4In A, by holding the front waist member 20f with one hand and pulling the tab 30 (locking part 32) towards the non-skin side with the other hand, the force is concentrated on the separating part 25, making it easy to tear the waist member 20. Therefore, this makes it easy to remove the diaper 1 from the wearer's body or to change the diaper from an underwear-type diaper to a belt-type diaper.

[0129] In addition, such as Figure 2 As shown, a front leg elastic member 28 extending along the lower edge of the front waist member 20f (i.e., the outline of the leg opening 1b) is provided. The front leg elastic members 28 are all elastic members such as elastic lines, and are arranged in the thickness direction between the non-skin side piece 21 and the skin side piece 22 while extending from one side in the left-right direction to the other (see...). Figure 2 , Figure 3 Similarly, a rear leg elastic member 29 extending along the lower edge of the lower side in the vertical direction (i.e., the outline of the leg opening 1b) is provided in the rear waist member 20b. The rear leg elastic members 29 are all elastic members such as elastic lines, and are arranged in the thickness direction between the non-skin side piece 21 and the skin side piece 23 in a state of elongation from one side in the left-right direction to the other side (see...). Figure 2 , Figure 3 wait).

[0130] By providing these leg elastic members 28 and 29, elasticity is imparted along the leg opening 1b of the diaper 1, and the leg opening 1b easily conforms to the wearer's legs. In particular, in the back waist member 20b, the leg opening 1b is prone to rising and separating from the wearer's body (hips) or shifting position due to the protrusion of the wearer's buttocks or the influence of the wearer's leg movements. Therefore, by providing the rear leg elastic member 29 that stretches along the leg opening 1b, the fit of the back waist member 20b around the wearer's legs on the hip side is improved, making it less likely for the wearer to experience discomfort or pain.

[0131] To facilitate this effect, it is desirable that at least the rear leg elastic member 29 is continuously disposed in the left-right direction in the region from the side joint 40b of the rear waist member 20b to the outer end 10s of the absorbent body 10. In this embodiment, the rear leg elastic member 29 is continuously disposed from the side joint 40b located on one side in the left-right direction to the side joint 40b located on the other side in the left-right direction (see...). Figure 2 Therefore, this allows for a further improvement in fit over a wide range around the wearer's hips and legs.

[0132] Furthermore, in diaper 1, it is desirable that the stress in the stretch direction (left-right direction) of the stretchable region 20EA is greater than the stress in the stretch direction (up-down direction) of the region where the absorbent elastic member 50 is disposed. Here, the stress of the stretchable region 20EA can be measured using, for example, an Autograph type tensile testing machine (e.g., AG-1KN1) manufactured by Shimadzu Corporation, as follows: First, the front waist member 20f of diaper 1 is stretched until the folds caused by the contraction of the skin side piece 22 are eliminated on the surface of the front waist member 20f, and in this state, the width dimension of the stretchable region 20EA is measured. Subsequently, the stretchable region 20EA is cut according to this dimension using a cutter to obtain a sample. Next, one end of the sample is clamped between fixed chucks, and the other end is clamped between movable chucks. After stretching the sample to approximately 90% of its initial length at a speed of 300 mm / min, the sample is reversed, and then the tensile load (N) is obtained when the sample is contracted to approximately 75% of its initial length. Thus, the tensile load is converted into stress (N / mm) per unit length (mm) and used as stress. The stress in the region where the absorbent elastic member 50 is configured can also be measured in a similar manner by obtaining a sample by cutting out a predetermined portion of the absorbent body 10.

[0133] It should be noted that the expansion region 20EA and the absorber elastic member 50 can be compared using a "stretch coefficient". That is, the stretch coefficient of the expansion region 20EA in the expansion direction (left-right direction) can be greater than the stretch coefficient of the region where the absorber elastic member 50 is located in the expansion direction (up-down direction). It should be noted that the stretch coefficient is a coefficient that determines the ease with which each part is stretched in its current state. For example, the stretch coefficient can be calculated using the following method.

[0134] First, cut the portion to be measured (including the stretch area 20EA and the portion of the absorbent elastic member 50) from the product to be measured (diaper 1) in the same manner as described above as a sample. Next, place the cut samples in their natural state for 60 minutes at 20°C and 60RH without applying a tensile load. Then, draw a line L perpendicular to the stretch direction at the center of the width direction along the stretch direction of each sample, and measure the length of line L in its natural state. At this time, draw line L at a position on a horizontal platform and without applying a load to the sample as much as possible, and measure the length of line L. Here, the length of line L is defined as the initial length "A". In addition, to reduce measurement error, it is preferable to draw line L as long as possible in the sample, but it is necessary not to place line L in the part that will be clamped by the chuck of the tensile testing machine in the next test. Next, hold both ends of the sample in the stretch direction in the tensile testing machine (such as the Autograph manufactured by Shimadzu Corporation) and stretch the sample until a load of 0.8N is applied. Then, the length of the line L at elongation is measured and defined as “A′”. For example, in a tensile testing machine, the sample is pulled along the direction of stretching at a tensile speed of 100 mm / min (pulled vertically upward relative to the horizontal plane). Based on these measurements, the elongation ratio can be calculated using the following equation.

[0135] Elongation coefficient = (A' - A) / A

[0136] In diaper 1, when the stress (or tensile coefficient) of the stretchable region 20EA is greater than the stress (tensile coefficient) of the absorbent elastic member 50, the force applied by the stretchable region 20EA to cause the waist member 20 (front waist member 20f) to contract in the lateral direction is more likely to be stronger than the force applied by the absorbent elastic member 50 to pull the upper end of the absorbent body 10 downward. Therefore, when resisting the force of the absorbent elastic member 50 pulling the upper end of the absorbent body 10 downward in the vertical direction, the waist member 20 is less likely to shift position. This makes it easier to maintain the fit of the waist member 20 around the wearer's waist.

[0137] ===Second Implementation Method===

[0138] In the second embodiment, the panty-type diaper 2 (hereinafter also referred to as "diaper 2") is described below, which includes a low stretch region 20NA, the stretch of which is lower than that of the stretch region 20EA in the waist member 20. Figure 7 This is a plan view of the diaper 2 in an unfolded and elongated state, as seen from the skin side along the thickness direction.

[0139] The basic structure of diaper 2 is substantially the same as that of diaper 1 in the first embodiment. That is, diaper 2 includes: a liquid-absorbent body 10; and a waist member 20 disposed on the non-skin side of the absorbent body 10. On the other hand, at least in the front waist member 20f, diaper 2 includes a low-elasticity region 20NA, the elasticity of which is lower than that of the elasticity of the elasticity region 20EA formed by the elastic skin side piece 22. The low-elasticity region 20NA is located laterally outside the elasticity region 20EA and adjacent to it. In other words, the low-elasticity region 20NA is disposed laterally outside the elasticity region 20EA and is located at a position overlapping the elasticity region 20EA in the vertical direction (see [link to original text]). Figure 7 (The slashed part in the text).

[0140] In diaper 2, each low-stretch area 20NA is formed, for example, by performing a process to destretch predetermined areas of the skin side panel 22. Therefore, the front waist member 20f has lateral stretchability in the stretch area 20EA, and has no stretchability or very low stretchability in the low-stretch areas 20NA located on both sides in the lateral direction.

[0141] When the waist member 20f is in its natural or worn state, in the stretch region 20EA, the skin side panel 22 contracts in the left-right direction, while the non-skin side panel 21 does not easily contract. Therefore, multiple fine folds extending in the up-down direction are formed on the non-skin side surface. On the other hand, in the low stretch region 20NA, since neither the skin side panel 22 nor the non-skin side panel 21 contracts easily, folds are less likely to form on the surface. Therefore, in the low stretch region 20NA of the front waist member 20f, compared to the stretch region 20EA, it is easier to ensure the shape retention of the panel member. Therefore, for example, when unlocking the locking part 32 that has been locked to the front waist member 20f while the diaper 2 is worn, it is easier to suppress the deflection or twisting of the panel member (waist member 20) near the low stretch region 20NA. Therefore, this makes it easier to smoothly unlock the locking part 32 from the front waist member 20f. Furthermore, when replacing the used diaper 2 with a new one in the bathroom while out, it is easier to ensure the shape retention of the front waist member 20f near the low stretch area 20NA, making it easier to lock the locking part 32 into that area.

[0142] It should be noted that when a low-stretch region 20NA is formed by performing the non-stretching treatment on the sheet member (e.g., nonwoven sheet) as described above, the fibers (loop members) of the nonwoven fabric harden in this region, making it difficult for the surface of the locking part 32 to engage with the hook and loop fastener (hook member). Therefore, in the waist member 20 of the diaper 2, as Figure 7As shown, the low-twist region 20NA is configured such that the area locked by the locking part 32 does not overlap with the low-twist region 20NA. In other words, the ranges of the telescopic region 20EA and the low-twist region 20NA are set such that the locking part 32 is locked to the area outside the low-twist region 20NA. However, the locking part 32 can lock to the low-twist region 20NA, and the locking part 32 and the low-twist region 20NA (non-twist region) can overlap.

[0143] Furthermore, when the waist member 20 includes an elastic region 20EA and a low elastic region 20NA, it is desirable that the lateral length (width) of the elastic region 20EA is longer than the lateral length (width) of the low elastic region 20NA. In diaper 2, in the same manner as diaper 1, the waist member 20 is elastic in the area located between a pair of locking parts 32 and 32 in the lateral direction, which allows for enhanced fit around the wearer's waist. However, if the width of the low elastic region 20NA is wider than the width of the elastic region 20EA, there is a risk that the area of ​​elasticity applied to the waist member 20 becomes smaller and insufficient fit cannot be achieved. Conversely, in diaper 2, as... Figure 7 As shown, the lateral width of the stretchable area 20EA is wider than that of the low stretchable area 20NA, thus giving the waist member 20 (front waist member 20f) sufficient stretchability. Therefore, this allows for enhanced fit of the diaper 2.

[0144] In addition, such as Figure 7 As shown, a separation section 25 is provided in each low-stretch region 20NA, thus enabling easy separation of the separation section 25. For example, when the separation section 25 is a perforation as described above, the force for tearing the perforation can be easily applied to the sheet member constituting the waist member 20 in the low-stretch region 20NA, which is not easily stretched. This makes it easy to separate the separation section 25.

[0145] ===Other features related to Diaper 1 and Diaper 2===

[0146] In addition to the features mentioned above, diaper 1 and diaper 2 also have the following features.

[0147] In the front waistband component 20f (front piece) of diapers 1 and diapers 2, when the locking parts 32 and 32 are locked, the telescopic area 20EA is provided over the entire area located between the pair of left-right locking parts 32 and 32 (see...). Figure 6(etc.). That is, the telescopic region 20EA is not only provided at the central position 32C in the vertical direction of the locking part 32, but the telescopic region 20EA is also provided to extend continuously in the left and right direction through the entire rectangular region as follows: the rectangular region extends from the upper end 32et to the lower end 32eb in the vertical direction of the locking part 32, and is located between a pair of locking parts 32 and 32 in the left and right direction (between the inner ends of 32 and 32 in the left and right directions).

[0148] Therefore, the entire rectangular area sandwiched between the pair of locking parts 32 on the left and right sides contracts in the left and right direction, making it easier for the two ends of the back waist member 20b (back body piece) to be pulled inward by the pair of locking parts 32. As a result, the waist opening 1a contracts and becomes easier to fit along the wearer's waist, making it less prone to positional shift.

[0149] Furthermore, in the absorbent elastic member 50 provided in the absorbent body 10, the length of the rear side (back side) of the diapers 1 and 2 in the front-to-back direction is longer than the length of the front side (abdominal side). Figure 5 In the longitudinal direction (length direction) of the diaper 1 in the unfolded and stretched state, the length L50b of the absorbent elastic member 50 on the rear side (back side) relative to the central position CL is longer than the length L50f of the absorbent elastic member 50 on the front side (ventral side) (L50b>L50f).

[0150] During the use of diapers 1 or 2, the area on the rear side of the central position CL in the front-back direction is located at the wearer's buttocks. Therefore, if the absorbent body 10 does not fit snugly along the seam in the buttocks, there is a risk that excretory fluids such as menstrual blood may leak along the seam in the buttocks to the outside of the absorbent body 10. In this respect, as Figure 5 As shown, by increasing the length L50b of the rear side of the absorbent elastic member 50 in the longitudinal direction (length direction), the contractile force exhibited by the absorbent elastic member 50 can be applied to the rear side of the absorbent body 10 over a wide range. That is, the absorbent body 10 is pressed against the wearer's body side due to the contractile force exhibited by the absorbent elastic member 50, and the absorbent body 10 easily and tightly fits the seam of the buttocks. Therefore, this makes it possible to further enhance the fit of diapers 1 and 2, and makes it less likely for excretions such as menstrual blood to leak.

[0151] Furthermore, in the vertical direction of the back waist member 20b (back panel) of diapers 1 and 2, the rear end 50eb (upper dorsal end) of the absorbent elastic member 50 is located above the lower end 30eb of the protrusion 30 (see [reference]). Figure 5). That is, in the vertical direction with respect to the rear waist body member 20b (rear body piece), the region where the pair of tabs 30 and 30 are arranged is arranged to at least partially overlap with the region where the expansion and contraction property exhibited by the absorbent elastic member 50 is applied. In such a configuration, when the tabs 30 and 30 of the rear waist body member 20b are pulled outward in the left and right direction during the use of the diaper 1 or 2, the force for pulling the tabs 30 and 30 also acts on the absorbent elastic member 50. Therefore, when the wearer performs an operation of grasping the tabs 30 and 30 and pulling them in the left and right direction to lock them to the front waist body member 20f side, the rear upper end portion (including the rear side end 50eb) of the absorbent elastic member 50 is pulled in the left and right direction. This makes it less likely for the rear region of the absorbent main body 10 to slide downward, and due to the contraction force of the absorbent elastic member 50, the absorbent main body 10 is easily fitted into the groove of the wearer's buttocks.

[0152] In addition, as Figure 5 shown, the left and right direction length W28 of the front side leg elastic member 28 arranged along the lower end edge portion (outline of the leg circumference opening 1b) of the front waist body member 20f is shorter than the left and right direction length W29 of the rear side leg elastic member 29 arranged along the lower end edge portion (outline of the leg circumference opening 1b) of the rear waist body member 20b (W28 < W29). In other words, in the diapers 1 and 2, the range where the left and right direction contraction force exhibited by the front side leg elastic member 28 is applied in the front waist body member 20f is narrower than the range where the left and right direction contraction force exhibited by the rear side leg elastic member 29 is applied in the rear waist body member 20b. In Figure 5 the case of, in the rear waist body member 20b, the contraction force of the rear side leg elastic member 29 is applied in the entire region in the left and right direction, while in the front waist body member 20f, regions where the contraction force exhibited by the front side leg elastic member 28 is not applied are provided at both ends in the left and right direction.

[0153] By making both ends in the left and right direction of the front waist body member 20f not easily contract, when putting on the sanitary napkin 1 or 2, the operation of locking the tabs 30 provided at both ends in the left and right direction of the rear waist body member 20b can be easily performed by grasping both ends in the left and right direction of the front waist body member 20f. That is, grasping the edges formed at both ends in the left and right direction of the front waist body member 20f makes it easier to perform the operation of putting on the diaper 1 or 2, enabling it to be more easily fitted to the body.

[0154] In addition, as Figure 2 and Figure 6As shown, with the locking portion 32 of the tab 30 locked to the front waist member 20f, the front leg elastic member 28 is positioned below the locking portion 32. That is, the upper end of the front leg elastic member 28 is located below the lower end 32eb of the locking portion 32 in the vertical direction. Therefore, in the front waist member 20f, the contractile force exhibited by the front leg elastic member 28 is less likely to be applied to the area locked by the locking portion 32, making it easier to lock the tab 30 to the front waist member 20f when putting on diapers 1 or 2. Furthermore, with the tab 30 locked to the front waist member 20f, the elasticity of the front leg elastic member 28 is less likely to be interfered with by the locking portion 32, thus making it easier for the leg opening 1b to fit snugly against the wearer's groin in the front waist member 20f. Therefore, this enhances the fit of diapers 1 and 2.

[0155] Furthermore, functional materials such as cooling agents, warming agents, and fragrances can be incorporated into the absorbent body 10 or waistband 20 of diapers 1 and 2. For example, by incorporating a cooling agent in a predetermined area on the skin-side surface or non-skin-side surface of the skin-side sheet 12 constituting the absorbent body 10, a cooling sensation can be provided to the wearer during the use of diapers 1 or 2.

[0156] When using a cooling agent as a functional material, cooling agents known in the art can be used, but those that are volatile and act on receptor-activated pathways (TRPM8) in the skin's nerves are preferred. Examples include menthol (e.g., L-menthol) and its derivatives (e.g., menthyl lactate), methyl salicylate, camphor, cucumber extract, and essential oils derived from plants (e.g., peppermint, eucalyptus, nutmeg).

[0157] Similarly, when using a temperature-sensitive agent as a functional material, temperature-sensitive agents known in the art can be used. Examples include capsaicin, capsaicin (LD50: 47 mg / kg, molecular weight: 305), capsaicin derivatives (such as dihydrocapsaicin, nordihydrocapsaicin, homodihydrocapsaicin, homocapsaicin and synthetic capsaicinine), paprika, benzyl nicotinate (LD50: 2,188 mg / kg, molecular weight: 213), β-butoxyethyl nicotinate, N-acylvanillamide, vanillylnonanoate, polyols, chili powder, chili tincture, chili extract, vanillylnonanoate, vanillyl alcohol alkyl ether derivatives (vanillyl... Vanillyl ethyl ether, vanillyl butyl ether (LD50: 4,900 mg / kg, molecular weight: 210), vanillyl pentyl ether, vanillyl hexyl ether), isovanillyl alkyl ether, ethyl vanillyl alkyl ether, resveratrol derivatives, substituted benzyl alcohol derivatives, substituted benzyl alcohol alkyl ether derivatives, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, gingerol (LD50: 250 mg / kg, molecular weight: 294), gingerone, hesperidin and pyrrolidone carboxylic acid, and any combination thereof.

[0158] Similarly, when using fragrances as functional materials, fragrances known in the art can be used. For example, fragrances with a green herbaceous plant type (green herbaceous aroma) can be used. A green herbaceous aroma is a fragrance type that includes green plant-like aromas (green notes) or herbal aromas (herbal notes). Green plant-like aromas represent a refreshing aroma type, such as grass or tender leaves. Herbal aromas (herbal notes) are fragrance types that have the characteristics of natural herbal aromas using herbs. A fragrance composition containing a fragrance with a green herbaceous aroma preferably contains a selection from cis-3-hexenol, cis-3-hexenyl formate, cis-3-hexenyl acetate, cis-3-hexenyl propionate, cis-3-hexenyl butyrate, trans-2-hexenal, trans-2-hexenyl acetate, hexyl acetate, styrax ester acetate, and 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal (IFF name: Helional). One or more fragrances including 3(4)-(5-ethylbicyclo[2,2,1]heptyl-2)-cyclohexanol, allyl 2-pentoxy-glycolate (IFF name: allyl pentoxy glycolate), 4-methyl-3-decen-5-ol (Givaudan name: undecavertol), hexanal, 2,4-dimethyl-3-cyclohexenylformaldehyde (IFF name: Tripral) and phenylacetaldehyde.

[0159] Furthermore, these functional materials can be used as core materials in a configuration where they are encapsulated in water-disintegrating microcapsules. Water-disintegrating microcapsules are defined as capsules with a diameter of 1 μm to 1,000 μm that have spaces for containing the core material (cooling component). There are no particular restrictions on the shape of the capsule, as long as it can contain the core material and control its release; examples of shapes include spherical and amorphous forms. The capsule can be a mononuclear capsule with one space for holding the core material, a multinuclear capsule with multiple spaces for holding the core material, or a matrix capsule with a structure containing microparticles of core material dispersed within the particles and a structure impregnated with liquid core material. Examples of space shapes include spherical and amorphous forms.

[0160] In microcapsules, the membrane material (wall material) encapsulating (or containing) the core material changes due to chemical stimulation, thereby releasing the encapsulated (or contained) components therein. Examples of chemical stimulation include contact between a liquid (aqueous solution) such as bodily fluids and the wall material of the microcapsule. By applying these chemical stimuli to the wall material of the microcapsule, the wall material can be disintegrated. As a result, the core material (functional material) within the microcapsule can be initiated for release, or, if the core material is released gradually prior to stimulation, the degree of release can be accelerated.

[0161] It should be noted that such microcapsules are commercially available, and one example is INCAP (trademark), which is commercially available from Symrise. Furthermore, microcapsules can be produced by dissolving the constituent materials of the microcapsules in water to form an aqueous solution, mixing the cooling component and surfactant with this aqueous solution, and spraying the aqueous solution while drying under reduced pressure. In addition, water-disintegrating microcapsules are exemplified as microcapsules, but microcapsules encapsulated in cyclodextrin with functional materials can also be used.

[0162] ===Other===

[0163] The above embodiments have been described to facilitate understanding of the invention, but not to limit it. The invention can be modified or improved in various ways without departing from its spirit, and the invention includes equivalents.

[0164] In the above embodiment, by using stretchable sheets (e.g., stretchable nonwoven fabric) as the skin side sheets 22 and 23 constituting the waist member 20, the waist member 20 is given stretchability in the left-right direction. However, other stretchable members can be provided in the waist member 20. For example, such as Figure 2 As shown, it is acceptable to provide waist elastic members 27, such as elastic lines, in the upper ends of the front waist member 20f and the rear waist member 20b so that they can stretch and contract in the left and right directions. By providing waist elastic members 27, the fit of the waist opening 1a is further improved, and this makes it possible to suppress the positional displacement of the waist member 20 during the use of the diaper 1.

[0165] Furthermore, when waist elastic members 27 are provided in the waist member 20, at least some of the waist elastic members 27 can be configured to overlap with both the skin side pieces 22 and 23. By doing so, the lateral stretchability exhibited by the waist elastic members 27 cooperates with the lateral stretchability exhibited by the skin side pieces 22 and 23, which can further improve the fit of the diaper 1 to the wearer's waist.

[0166] In the above embodiments, the following example is described: In diapers 1 and 2, in a belt-like state after the waist member 20 is separated using the separating part 25, the tab 30 engages with the rear waist member 20b (rear body piece) side, and the locking part 32 locks to the front waist member 20f (front body piece). However, the configuration of the tab 30 is not limited to this. For example, in the state after the waist member 20 is separated, a configuration in which the tab 30 is positioned on the front waist member 20f (front body piece) side, and the locking part 32 locks to the rear waist member 20b (rear body piece), is acceptable. Figure 2 As shown, since the elastic skin side panel 23 is provided on the back waist member 20b, the back waist member 20b also includes the same elastic region as the elastic region 20EA of the front waist member 20f. Therefore, even when the pair of locking parts 32 and 32 are locked to the back waist member 20b, the area between the locking parts 32 and 32 is elastic, which enhances the fit around the wearer's waist.

[0167] In the above embodiment, an example of providing a pair of locking portions 32 on both sides in the left-right direction was described, but multiple pairs of locking portions 32 can be provided. For example, it is acceptable to provide two pairs of locking portions 32 by configuring the two locking portions 32 to be spaced apart from each other in the vertical direction. In this case, if the elastic area is located at the central position in the vertical direction of any of the multiple pairs of locking portions, the waist opening can easily contract between the locking portions, and this makes it possible to achieve the excellent fit described above.

[0168] Explanation of reference numerals in the attached figures

[0169] 1: Diaper (underwear-type absorbent item) (first embodiment).

[0170] 1a: Waist opening, 1b: Leg opening

[0171] 2: Diapers (underwear-type absorbent items) (Second embodiment).

[0172] 10: Absorbent subject,

[0173] 11: Absorbent core,

[0174] 12: Front view,

[0175] 13: Back side film; 13a: Liquid-impermeable film; 13b: Hydrophobic film.

[0176] 20: Waist components,

[0177] 20f: Front waistline component,

[0178] 20b: Rear waist component,

[0179] 20EA: Scalable area, 20NA: Low Scalable area

[0180] 21: Non-skin side view, 22: Skin side view, 23: Skin side view

[0181] 25: Separation section, 25fe: Separation end, 25be: Separation end

[0182] 27: Elastic waist component; 28: Elastic front leg component; 29: Elastic rear leg component.

[0183] 30: lenticels,

[0184] 31: Substrate, 32: Locking part, 35: Protrusion engagement part

[0185] 40: Side joint, 40f: End, 40b: End

[0186] 50: Absorbent elastic component,

[0187] CL: Central position

Claims

1. An absorbent underwear-type garment having intersecting vertical, horizontal, and front-back directions. The absorbent underwear-type items include: Absorbent subject; and The waist component is configured to be layered on the non-skin side of the absorbent body. A pair of separating sections for separating the waist component into a front panel and a rear panel. At least one pair of locking parts are provided on the left and right sides of either the front panel or the rear panel. Each of the pair of locking parts is removably locked to a predetermined area of ​​the other of the front and rear body panels, and The other of the front and rear panels includes a telescopic region located at the center of the locking portion in the vertical direction. The expandable area is the area that can expand and contract along the left and right directions.

2. The absorbent underwear-type garment according to claim 1, characterized in that, The absorbent body includes an absorbent elastic member that extends and retracts along the length of the absorbent body.

3. The absorbent underwear-type garment according to claim 2, characterized in that, The plurality of absorber elastic members are arranged at predetermined intervals in the left-right direction, and The lateral width of the telescopic region is greater than the lateral distance between the absorber elastic member located at the outermost position on one side of the lateral direction and the absorber elastic member located at the outermost position on the other side of the lateral direction.

4. The absorbent underwear-type garment according to claim 2 or 3, characterized in that, The absorbent matrix includes an absorbent core containing a superabsorbent polymer, and The width of the telescopic region in the left-right direction is greater than the width of the absorbent core in the left-right direction.

5. The absorbent underwear-type article according to any one of claims 2 to 4, characterized in that, The width of the telescopic region in the left-right direction is greater than the width of the absorbent body in the left-right direction.

6. The absorbent underwear-type article according to any one of claims 2 to 5, characterized in that, In the vertical direction, the upper front end of the absorbent elastic member is located below the lower end of the telescopic region.

7. The absorbent underwear-type article according to any one of claims 2 to 6, characterized in that, In the vertical direction, the upper front end of the absorbent elastic member is located below the lower end of the separation portion.

8. The absorbent underwear-type article according to any one of claims 2 to 7, characterized in that, The underwear-type absorbent article also includes a pair of side joints at one of the two ends in the left-right direction. Each of the pair of side joints is the part that joins the front panel and the rear panel together, and With the locking part locked to the waist member, The locking part is located on the outer side of the absorber elastic member in the left-right direction and on the inner side of the side joint in the left-right direction.

9. The absorbent underwear-type article according to any one of claims 1 to 8, characterized in that, The part is provided in which the two ends of the absorbent body in the left-right direction and the telescopic region overlap each other with respect to the up-down direction.

10. The absorbent underwear-type article according to any one of claims 1 to 9, characterized in that, In the unfolded and elongated state The contractile force in the left-right direction of the portion of the stretchable region that overlaps with the absorbent body when viewed along the thickness direction. Less than The contractile force in the left-right direction of the portion of the stretchable region that does not overlap with the absorbent body when viewed along the thickness direction.

11. The absorbent underwear-type article according to any one of claims 1 to 10, characterized in that, A low-stretch region with a stretchability lower than that of the stretch region is provided, and The low-extension region is positioned on the outer side of the extension region in the left-right direction.

12. The absorbent underwear-type garment according to claim 11, characterized in that, At least a portion of the low-extension region is disposed on the outer side of the extension region in the left-right direction, and is disposed at a position that overlaps with the extension region in the up-down direction.

13. The absorbent underwear-type garment according to claim 11 or 12, characterized in that, The width of the telescopic region in the left-right direction is greater than the width of the low telescopic region in the left-right direction.

14. The absorbent underwear-type article according to any one of claims 1 to 13, characterized in that, The entire locking portion overlaps with the telescopic region in the vertical direction.

15. The absorbent underwear-type article according to any one of claims 1 to 14, characterized in that, The absorbent matrix includes an absorbent core containing a superabsorbent polymer, and In the vertical direction, the lower end of the locking part is located above the upper end of the absorbent core.

16. The absorbent underwear-type article according to any one of claims 1 to 15, characterized in that, The underwear-type absorbent article also includes a tab having the locking portion. A tab engagement portion is provided on the outer side of the locking portion in the left-right direction. The tab engagement portion is the part that engages the tab with the waist member, and The locking part is provided with either a hook component or a ring component in a hook-and-loop fastener.

17. The absorbent underwear-type article according to claim 16, characterized in that, The underwear-type absorbent article also includes a pair of side joints at one of the two ends in the left-right direction. Each of the pair of side joints is the part that joins the front panel and the rear panel together. In the left-right direction, the tab joint is located at any position from the outer end of the absorbent body to the side joint, and The separating portion is disposed in the left-right direction between the tab engaging portion and the locking portion.

18. The absorbent underwear-type article according to any one of claims 1 to 17, characterized in that, The rear panel includes a leg elastic member that is capable of extending and retracting along the lower edge of the rear panel in the left-right direction.

19. The absorbent article of the underwear type according to any one of claims 1 to 18, characterized in that, The absorbent body includes an absorbent elastic member that extends and retracts along the length of the absorbent body, and The stress in the left-right direction of the telescopic region is greater than the stress in the up-down direction of the region where the absorber elastic member is disposed.

20. The absorbent underwear-type article according to any one of claims 1 to 19, characterized in that, The other of the front and rear panels includes the telescopic region between the upper and lower ends of the locking portion in the vertical direction and throughout the entire portion between the inner ends of the pair of locking portions in the horizontal direction.

21. The absorbent article of the underwear type according to any one of claims 1 to 20, characterized in that, The absorbent body includes an absorbent elastic member that extends and retracts along the length of the absorbent body, and In the length direction, the length of the portion of the absorber elastic member located rearward relative to the central position is longer than the length of the portion of the absorber elastic member located frontward relative to the central position.

22. The absorbent underwear-type article according to claim 21, characterized in that, The rear panel includes a tab, and the locking part is disposed in the tab. In the vertical direction, the upper rear end of the absorbent elastic member is located above the lower end of the tab.

23. The absorbent article of the underwear type according to any one of claims 1 to 22, characterized in that, The absorbent underwear-type items also include: A front leg elastic member extending along the lower end edge located in the vertical direction of the front body piece; and The rear leg elastic member extends along the lower end edge located in the vertical direction of the rear body piece, and The length of the front leg elastic member in the left-right direction is shorter than the length of the rear leg elastic member in the left-right direction.

24. The absorbent underwear-type article according to claim 23, characterized in that, In the vertical direction, the upper end of the elastic member of the front leg is located below the lower end of the locking part.

25. The absorbent article of the underwear type according to any one of claims 1 to 24, characterized in that, Functional material is disposed in a predetermined area of ​​at least one of the absorbent body and the waist member. The functional material includes at least one of a cooling agent, a warming agent, and a fragrance.

Images