Absorbent pad and diaper cover set

Abstract

To suitably suppress soiling of a diaper cover.SOLUTION: The absorbent pad 1 includes a main body part 10 divided into a belly side part 101, a back side part 102, and a crotch part 103 by being divided into three parts in a longitudinal direction X, and an LG elastic member 50 arranged to extend in the longitudinal direction X at both side edge parts of the main body part 10 in a width direction Y and having an elastic part 51 for expanding and contracting the main body part 10 in the longitudinal direction X. The main body 10 and the LG elastic member 50 are configured such that, in a worn state in which the absorbent pad 1 is attached to the diaper cover 2 such that the central positions CP1 and CP2 of the absorbent pad 1 and the diaper cover 2 overlap each other, a diaper cover satisfying a positional relationship condition in which the inner edge in the widthwise direction Y of the elastic part 51 is disposed outside the edge side 2e of the narrowest side 2g in the widthwise direction Y in the worn state is present among a group of diaper covers in which the widths of the narrowest side 2g of the diaper cover 2 are within a range from 110mm to 160mm.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to an absorbent pad and diaper cover set. [Background technology]

[0002] Conventionally, diapers (absorbent pads) that are attached to cloth diaper covers have been known. For example, Patent Document 1 discloses a configuration in which a diaper is used in combination with a diaper cover that has substantially the same shape as the diaper. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-215229 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, in light of the SDGs, there has been a growing need for reusable diaper covers like those mentioned above. However, these diaper covers require washing if they become soiled with the wearer's excrement, which places a significant burden on caregivers. Therefore, there is a need for a mechanism that prevents excrement from leaking sideways from the absorbent pad and minimizes the amount of excrement adhering to the diaper cover.

[0005] For example, because the diaper cover and the absorbent pad are configured as separate entities, there is a risk that, when used for a long period of time, the edge of the absorbent pad that comes into contact with the wearer's legs (mainly the inner thighs) may be pulled into the wearer's crotch area (inside the edge of the leg openings of the diaper cover) due to the wearer's leg movements (e.g., when closing their legs from an open position). As a result, body waste is more likely to leak sideways from the edge of the absorbent pad, and the diaper cover (e.g., the portion of the diaper cover that extends beyond the edge of the absorbent pad that has been pulled inward by the action described above) may become soiled with the body waste.

[0006] Therefore, one aspect of the present disclosure aims to provide an absorbent pad and a diaper cover set that can effectively prevent the diaper cover from becoming soiled. [Means for solving the problem]

[0007] The absorbent pad according to a first aspect of the present disclosure is an absorbent pad to be attached to a cloth diaper cover when used, and is divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral part, a dorsal part, and a crotch part located between the ventral part and the dorsal part, and comprises a main body part having a liquid-permeable top sheet that faces the skin of a wearer when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's excrement, and two longitudinally extending portions disposed at both side edge parts of the main body part in the width direction perpendicular to the longitudinal direction. and an elastic member having at least one elastic portion that stretches the main body portion in the longitudinal direction, and the main body portion and the elastic member are configured so that, in a worn state in which the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the part of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest part, then among diaper covers whose narrowest part has a width in the range of 110 mm to 160 mm, there is a diaper cover that satisfies the positional relationship condition that, in the worn state, the inner edge in the widthwise direction of at least one elastic portion is positioned widthwise outer than the edge of the narrowest part.

[0008] The absorbent pad according to a second aspect of the present disclosure is an absorbent pad to be attached to a cloth diaper cover for use, and is divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral part, a dorsal part, and a crotch part located between the ventral part and the dorsal part, and comprises a main body part having a liquid-permeable top sheet that faces the skin of a wearer when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's excrement; and two longitudinally extending portions extending in the width direction of the main body part at both side edges of the main body part in a width direction perpendicular to the longitudinal direction. and an elastic member arranged in a manner such that the absorbent pad and the diaper cover are centered over each other, the elastic member having at least one elastic portion that expands and contracts the main body in the longitudinal direction. When the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover are aligned, and the narrowest part is defined as the part of the diaper cover that faces the crotch part and has the shortest widthwise length, the main body and the elastic member are configured so that, for any diaper cover whose width is in the range of 120 mm to 140 mm, the main body and the elastic member are configured to satisfy a positional relationship condition in which, in the attached state, the inner edge in the widthwise direction of at least one elastic portion is located widthwise outer than the edge of the narrowest part.

[0009] A diaper cover set according to another aspect of the present disclosure is a diaper cover set comprising a cloth diaper cover and an absorbent pad attached to the diaper cover for use, wherein the absorbent pad is divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral part, a dorsal part, and a crotch part located between the ventral part and the dorsal part, and the diaper cover set comprises a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and a liquid-impermeable back sheet that is disposed between the top sheet and the back sheet to absorb the wearer's excrement. and elastic members arranged to extend longitudinally at both side edges of the main body in a width direction perpendicular to the longitudinal direction, and having at least one elastic member for elasticating the main body in the longitudinal direction. When the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the portion of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest portion, in the attached state, the inner edge in the width direction of at least one elastic member is positioned widthwise outward of the edge of the narrowest portion. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide an absorbent pad and a diaper cover set that can effectively prevent the diaper cover from becoming soiled. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a plan view of an absorbent pad according to an embodiment, seen from the skin side. [Figure 2] FIG. 2 is a plan view of the absorbent pad of FIG. 1, seen from the non-skin facing side. [Figure 3] FIG. 2 is a schematic diagram of a cross-sectional structure of the absorbent pad taken along line III-III in FIG. [Figure 4] 4 is a schematic diagram of a cross-sectional structure of the absorbent pad taken along line IV-IV in FIG. 1. FIG. [Figure 5] FIG. 2 is a plan view of the diaper cover as seen from the skin side. [Figure 6]FIG. 2 is a plan view of the diaper cover set in a worn state, viewed from the skin-facing side. [Figure 7] FIG. 2 is an enlarged view of the vicinity of the narrowest edge of the diaper cover set in the worn state. [Figure 8] FIG. 2 is a diagram schematically illustrating a state in which the device is worn. [Figure 9] FIG. 10 is a plan view of a diaper cover set according to a first modified example, as viewed from the skin-facing side. [Figure 10] FIG. 10 is a plan view of a diaper cover set according to a second modified example, as viewed from the skin-facing side. DETAILED DESCRIPTION OF THE INVENTION

[0012] In the present specification and the accompanying drawings, at least embodiments [1] to

[16] are disclosed.

[0013] [1] An absorbent pad that is attached to a cloth diaper cover and used, a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member having at least one elastic portion disposed on both side edges of the main body portion in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction, the elastic member causing the main body portion to expand and contract in the longitudinal direction, The absorbent pad is configured such that, in an attached state in which the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the portion of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest portion, then among diaper covers whose widths at the narrowest portion fall within the range of 110 mm to 160 mm, there is a diaper cover that satisfies the positional relationship condition in which, in the attached state, the inner edge in the widthwise direction of the at least one stretchable portion is positioned outer in the widthwise direction than the edge of the narrowest portion.

[0014] The absorbent pad [1] described above, when attached to at least one (one type of) diaper cover included in the diaper cover group, can achieve a state in which the inner edge of at least one stretchable section is positioned widthwise outward of the edge of the narrowest portion of the diaper cover. This allows the uneven wrinkles (at least a portion of the leg gathers) formed by the stretchable section to be positioned outward of the edge of the narrowest portion of the diaper cover when worn. As a result, when the edge of the absorbent pad tends to be pulled inward due to the wearer's leg movements or other reasons, the uneven wrinkles function as an interference (hook) with the edge of the narrowest portion of the diaper cover, thereby preventing the edge of the absorbent pad from being pulled inward. This prevents the edge of the diaper cover from being soiled by excrement leaking sideways from the edge of the absorbent pad. Therefore, the absorbent pad described above can effectively prevent the diaper cover from being soiled.

[0015] [2] The elastic member has at least a first elastic portion disposed on the innermost side in the width direction, and a second elastic portion disposed on the outer side of the first elastic portion in the width direction at a distance from the first elastic portion in the width direction, The positional relationship condition includes a condition that, in the worn state, the inner edge of the first stretchable portion is positioned outer in the width direction than the edge of the narrowest portion.

[0016] According to the configuration [2] above, when the diaper cover is worn, the multiple elasticized sections (first and second elasticized sections) can be positioned outward in the width direction from the narrowest edge of the diaper cover. Furthermore, the elasticity of adjacent first and second elasticized sections interacts with each other, forming wrinkles between them that are wider in the width direction than those formed by a single elasticized section and that are more likely to interfere with the edge of the diaper cover. As a result, the edges of the absorbent pad can be more effectively prevented from being pulled inward into the diaper cover, thereby more effectively preventing soiling of the diaper cover.

[0017] [3] The absorbent pad of [2], wherein the stretching force of the first stretchable portion and the stretching force of the second stretchable portion are different from each other.

[0018] According to the above-mentioned configuration [3], by making the stretching force of the first stretchable section different from that of the second stretchable section, it is possible to form wrinkles of a non-uniform (distorted) shape between the first stretchable section and the second stretchable section, which results in more suitable formation of wrinkles that have a large interference effect on the edge of the diaper cover.

[0019] [4] The absorbent pad according to [3], wherein the stretching force of the first stretchable portion is higher than the stretching force of the second stretchable portion.

[0020] According to the above-mentioned configuration [4], by making the stretching force of the first stretchable section on the inside (closer to the edge of the narrowest portion of the diaper cover when worn) higher than that of the second stretchable section on the outside, it is possible to form relatively high wrinkles (walls) near the edge of the narrowest portion of the diaper cover (near the first stretchable section). This makes it possible to effectively prevent the absorbent pad from shifting position relative to the diaper cover (particularly, the edge of the absorbent pad slipping inside the diaper cover). On the other hand, the wrinkles formed farther from the edge of the narrowest portion of the diaper cover (outside the second stretchable section) are relatively lower (gentler) than the wrinkles formed near the first stretchable section, thereby improving the contact of the absorbent pad with the wearer's legs (thighs).

[0021] [5] The absorbent pad of any one of [2] to [4], wherein the distance between the first stretchable portion and the second stretchable portion in the width direction is 3.5 mm or more.

[0022] According to the above-mentioned configuration [5], a wrinkle wall having a sufficient width between the first and second elasticized parts can be formed, which effectively interferes with the edge of the diaper cover. As a result, the edge of the absorbent pad can be more effectively prevented from being pulled into the inside of the diaper cover, and the diaper cover can be more effectively prevented from being soiled.

[0023] [6] The main body portion has leg side gathers extending from the abdominal portion to the dorsal portion along the longitudinal direction, both ends of which in the longitudinal direction are fixed to the abdominal portion and the dorsal portion, and which are configured to be able to stand up by contracting in the longitudinal direction, the leg side gathers have upright fulcrums extending in the longitudinal direction on the inner side of the elastic members in the width direction, The absorbent pad of any one of [1] to [5], wherein the positional relationship condition includes a condition that the standing fulcrum is located inside the edge of the narrowest part in the width direction in the worn state.

[0024] If the leg side gathers' standing support points were positioned so as to overlap with the widthwise edges of the diaper cover, the edges of the diaper cover would interfere with the leg side gathers, potentially impairing their standing function. On the other hand, according to the configuration [6] above, the leg side gathers' standing support points are positioned inside the edges of the diaper cover, so that it is possible to avoid interference between the edges of the diaper cover and the leg side gathers, thereby preventing the leg side gathers from standing up.

[0025] [7] The absorbent pad of [6] further comprises an inner stretchable member that stretches the main body portion in the longitudinal direction, located inside the width direction of the upright fulcrum of the leg side gathers in the main body portion and on the non-skin-facing side of the absorbent core.

[0026] According to the configuration [7] above, a first wrinkle can be formed by stretching at least one elastic member on the outer side of the narrowest edge of the diaper cover in the width direction, and a second wrinkle can be formed by stretching the inner elastic member on the inner side of the narrowest edge of the diaper cover in the width direction. By forming first and second wrinkle walls extending longitudinally on both sides of the narrowest edge of the diaper cover in the width direction, it is possible to effectively prevent the absorbent pad from shifting in the width direction relative to the edge of the diaper cover when the diaper cover is worn. This means that the position of the absorbent pad relative to the diaper cover in the width direction can be more stabilized when the diaper cover is worn.

[0027] [8] The absorbent pad of any one of [1] to [7], wherein the inner edge of the at least one stretchable portion is positioned outward in the width direction from the absorbent core.

[0028] According to the configuration [8] above, at least one stretchable portion is positioned so as not to overlap with the relatively rigid absorbent core, which prevents the stretchable portion from being hindered by the absorbent core, and makes it possible to preferably form wrinkles that have a large interference effect on the edge of the diaper cover.

[0029] [9] An absorbent pad according to any one of [1] to [8], wherein the positional relationship conditions include a condition that, in the worn state, the edge of the narrowest part is positioned outside the midpoint between the absorbent core and the inner edge of the at least one stretchable part in the width direction.

[0030] According to the above-mentioned configuration [9], the edge of the narrowest part of the diaper cover is adjusted to be located closer to the stretchable section in the width direction than the absorbent core (i.e., in the area where wrinkles are likely to form due to the stretching of the stretchable section), which effectively prevents the absorbent pad from shifting relative to the edge of the diaper cover when the diaper cover is worn, thereby stabilizing the position of the absorbent pad relative to the diaper cover.

[0031]

[10] An absorbent pad according to any one of [1] to [9], wherein the positional relationship condition includes a condition that, when the diaper cover is divided into three equal parts in the longitudinal direction in order from the ventral side to the dorsal side, the dorsal end of the elastic member is located in the third region of the diaper cover in the worn state.

[0032] According to the above-mentioned configuration

[10] , when the diaper cover is worn, the stretchable parts can be easily overlapped with the edges of the leg openings of the diaper cover in the back region (third region). Furthermore, by overlapping the stretchable parts with the edges of the leg openings of the diaper cover, wrinkles formed by the stretchable parts are positioned on both sides of the width direction of the edge of the diaper cover, which more effectively prevents the absorbent pad from shifting position relative to the diaper cover.

[0033]

[11] The absorbent pad of

[10] , wherein the positional relationship condition includes a condition that, in the worn state, the ventral end of the elastic member is positioned in the first region of the diaper cover.

[0034] According to the above-mentioned configuration

[11] , the stretchable portions can be made to overlap with the edges of the leg holes of the diaper cover even in the ventral region (first region) when the diaper cover is worn. As a result, wrinkles formed by the stretchable portions are arranged on both sides of the width direction of the edges of the diaper cover in both the dorsal region (third region) and the ventral region (first region), which further effectively prevents the absorbent pad from shifting position relative to the diaper cover.

[0035]

[12] The absorbent pad of

[10] , wherein the positional relationship condition includes a condition that, in the worn state, the ventral end of the elastic member is positioned in the second region of the diaper cover.

[0036] According to the configuration

[12] above, when the diaper cover is worn, the elasticized portions overlap the edges of the leg openings of the diaper cover in the dorsal region (third region), while the elasticized portions do not overlap the edges of the diaper cover in the ventral region (first region). As a result, the wrinkles formed by the elasticized portions prevent the absorbent pad from shifting relative to the diaper cover in the dorsal region, while the absorbent pad is relatively flexible and movable relative to the ventral region, improving comfort for the wearer. If the absorbent pad were too tightly fixed relative to the diaper cover on both the dorsal and ventral regions, the wearer may feel uncomfortable. However, by preventing the absorbent pad from shifting relative to the diaper cover only on one of the dorsal and ventral regions (the dorsal region), it is possible to both prevent the absorbent pad from shifting relative to the diaper cover and ensure comfort for the wearer.

[0037]

[13] An absorbent pad that is attached to a cloth diaper cover and used, a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member having at least one elastic portion disposed on both side edges of the main body portion in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction, the elastic member causing the main body portion to expand and contract in the longitudinal direction, When the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, the main body and the stretchable member are configured to satisfy a positional relationship condition in which, for any diaper cover whose width at the narrowest part is in the range of 120 mm to 140 mm, the inner edge in the width direction of the at least one stretchable part is positioned widthwise outward of the edge of the narrowest part when the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap.

[0038] According to the absorbent pad of the above

[13] , when it is attached to any diaper cover included in the above diaper cover group and used, the same effect as that of the above [1] can be obtained.

[0039]

[14] A diaper cover set comprising a cloth diaper cover and an absorbent pad attached to the diaper cover, The absorbent pad comprises: a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member disposed at both side edges of the main body in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction, the elastic member having at least one elastic portion that expands and contracts the main body in the longitudinal direction, A diaper cover set in which, in an attached state in which the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the portion of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest portion, in the attached state, the inner edge portion in the widthwise direction of at least one stretchable portion is positioned outer in the widthwise direction than the edge portion of the narrowest portion.

[0040] The diaper cover set described in

[14] above allows the inner edge of at least one stretchable section of the absorbent pad to be positioned laterally outward of the edge of the narrowest section of the diaper cover. This allows the uneven wrinkles (at least a portion of the leg gathers) formed by the stretchable section to be positioned outward of the edge of the narrowest section of the diaper cover. As a result, when the edge of the absorbent pad tends to be pulled inward due to the wearer's leg movements or other reasons, the uneven wrinkles function as a part that interferes with the edge of the narrowest section of the diaper cover, thereby preventing the edge of the absorbent pad from being pulled inward. This prevents the edge of the diaper cover from being soiled by excrement leaking sideways from the edge of the absorbent pad. Therefore, the diaper cover set described above effectively prevents the diaper cover from being soiled.

[0041]

[15] A diaper cover set according to

[14] , wherein, in the worn state, the longitudinal length of the portion of the at least one stretchable portion that does not overlap with the diaper cover in the thickness direction perpendicular to the longitudinal direction and the width direction is longer than the longitudinal length of the portion of the at least one stretchable portion that overlaps with the diaper cover in the thickness direction.

[0042] According to the configuration

[15] above, it is possible to ensure a sufficient area for the wrinkles (uneven structure) formed by the stretchable part of the absorbent pad outside the edge of the leg opening part of the diaper cover, so that it is possible to more effectively prevent the edge of the absorbent pad from being pulled inside the diaper cover, and it is possible to more suitably prevent the diaper cover from becoming soiled.

[0043]

[16] The elastic member has at least a first elastic portion disposed at the innermost position in the width direction, and a second elastic portion disposed at a distance from the first elastic portion in the width direction and further outward in the width direction than the first elastic portion, The diaper cover set of

[14] or

[15] , wherein in the worn state, the inner edge of the first stretchable portion in the width direction is positioned outward in the width direction than the edge of the narrowest portion.

[0044] According to the configuration

[16] above, the same effect as the configuration [2] above can be obtained.

[0045]

[17] The diaper cover set of

[16] , wherein in the worn state, the distance between the first stretchable portion and the second stretchable portion in the width direction is wider than the distance between the inner edge of the first stretchable portion and the edge of the narrowest portion in the width direction.

[0046] According to the configuration

[17] above, by making the distance between the first and second stretchable sections larger than the distance between the inner edge of the first stretchable section and the edge of the narrowest section, a wrinkle wall having a sufficient widthwise length and a large interference effect with the edge of the diaper cover can be formed between the first and second stretchable sections. As a result, it is possible to more effectively prevent the edge of the absorbent pad from being pulled into the inside of the diaper cover, and to more effectively prevent the diaper cover from becoming soiled.

[0047] [Embodiment] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be designated by the same reference numerals, and redundant description will be omitted.

[0048] [Absorbent pad] The configuration of an absorbent pad 1 according to an embodiment will be described with reference to Figs. 1 to 4. Fig. 1 is a plan view of the absorbent pad 1 as seen from the skin-facing side. Fig. 2 is a plan view of the absorbent pad 1 as seen from the non-skin-facing side. Figs. 1 and 2 show the absorbent pad 1 in a state where it has been stretched to a state where no wrinkles are formed (hereinafter referred to as the "stretched state"). Figs. 3 and 4 are schematic diagrams showing the cross-sectional structure of the absorbent pad 1 taken along lines III-III and IV-IV in Fig. 1.

[0049] In this embodiment, the "wearer" is a person who wears the diaper cover 2 (see Figures 5 to 7) to which the absorbent pad 1 is attached. The "skin-facing side" is the side that faces the wearer's skin when the absorbent pad 1 is worn by the wearer together with the diaper cover 2 (hereinafter referred to as the "worn state"). The "non-skin-facing side" is the side that faces away from the wearer's skin when worn.

[0050] Hereinafter, the longitudinal direction (X-axis direction) of the absorbent pad 1 in a stretched state (see FIGS. 1 and 2) will be referred to as the "longitudinal direction X," the lateral direction (Y-axis direction) of the absorbent pad 1 perpendicular to the longitudinal direction X will be referred to as the "width direction Y," and the direction perpendicular to the longitudinal direction X and the width direction Y (Z-axis direction) will be referred to as the "thickness direction Z." The longitudinal direction X is the direction extending from the front side (ventral side) of the wearer's body to the back side (dorsal side) of the body when worn. The width direction Y is the direction coinciding with the left-right direction of the wearer when worn. The thickness direction Z is the direction in which the materials constituting the absorbent pad 1 (such as the topsheet 11, backsheet 12, and absorber 13 described below) are layered. The thickness direction Z is also the direction in which the absorbent pad 1 and the diaper cover 2 face each other when the absorbent pad 1 is attached to the diaper cover 2.

[0051] The absorbent pad 1 is an absorbent article used in conjunction with a diaper cover 2 (see Figures 5 to 8) that is worn around the wearer's lower torso. The absorbent pad 1 is, for example, a disposable diaper. The absorbent pad 1 is attached to the diaper cover 2 and positioned between the diaper cover 2 and the wearer. The diaper cover 2 is a reusable cloth undergarment.

[0052] The absorbent pad 1 has a main body portion 10. As shown in FIGS. 1 and 2, for example, the main body portion 10 has a rectangular outer shape when viewed in the thickness direction Z in a stretched state. The main body portion 10 is divided into three portions in the longitudinal direction X, namely, a ventral portion 101, a dorsal portion 102, and a crotch portion 103. The ventral portion 101 includes a portion located on the ventral side of the wearer when worn. The dorsal portion 102 includes a portion located on the dorsal side of the wearer when worn. The crotch portion 103 is a portion located between the ventral portion 101 and the dorsal portion 102. The ventral portion 101, the crotch portion 103, and the dorsal portion 102 are aligned along the longitudinal direction X from the ventral side (front) to the dorsal side (rear) of the wearer.

[0053] The main body 10 has a top sheet 11, a back sheet 12, an absorbent body 13, and a pair of side sheets 14. These components can be joined together using a known material such as a hot melt adhesive.

[0054] The topsheet 11 is disposed on the skin side of the wearer. That is, the topsheet 11 is a liquid-permeable sheet that faces the skin of the wearer when worn. The topsheet 11 can be formed, for example, from a liquid-permeable nonwoven or woven fabric, a synthetic resin film with liquid-permeable holes, or a composite sheet of these.

[0055] The backsheet 12 is disposed on the side facing away from the wearer's skin. In other words, the backsheet 12 is a liquid-impermeable sheet that faces the diaper cover 2 when worn. The backsheet 12 may be formed, for example, from a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet of these. In this embodiment, the backsheet 12 has a leak-barrier sheet 121 and an exterior sheet 122. The leak-barrier sheet 121 is formed from a liquid-impermeable synthetic resin film. The exterior sheet 122 is formed from a liquid-impermeable nonwoven fabric and is disposed outside the leak-barrier sheet 121.

[0056] The absorbent body 13 is disposed between the topsheet 11 and the leakproof sheet 121 (backsheet 12). For example, the absorbent body 13 includes an absorbent core 131 and a core wrap 132 that covers the absorbent core 131. The absorbent core 131 is a member that absorbs the wearer's body waste and has liquid absorption and liquid retention properties. The absorbent core 131 is a laminate of absorbent materials including, for example, pulp, superabsorbent polymer (SAP), or a mixture thereof. The core wrap 132 is, for example, a tissue or nonwoven fabric sheet. As shown in FIG. 1 , for example, the absorbent body 13 (the absorbent core 131 and the core wrap 132) is formed into a rectangular shape when viewed in the thickness direction Z. However, the shape of the absorbent body 13 is not limited thereto. For example, the absorbent core 131 may be formed into a gourd shape (or an hourglass shape) with a narrowed central portion in the longitudinal direction X.

[0057] The ventral end 131a of the absorbent core 131 is located in the ventral portion 101. The dorsal end 131b of the absorbent core 131 is located in the dorsal portion 102. The width w1 of the absorbent core 131 in the width direction Y (i.e., the distance between both end portions 131c of the absorbent core 131 in the width direction Y) is, for example, 110 mm.

[0058] The pair of side sheets 14 are arranged on both sides of the main body 10 in the width direction Y, over the entire area in the longitudinal direction X, so as to cover both side edges of the top sheet 11 in the width direction Y. The side sheets 14 are liquid-impermeable sheets, and may be made of, for example, a hydrophobic nonwoven fabric.

[0059] 1, 3, and 4, the main body 10 has a pair of LG portions 15 and a pair of LSG portions 16. In the width direction Y, the pair of LSG portions 16 are located inside the pair of LG portions 15.

[0060] The LG section 15 is mainly formed by the backsheet 12, the portions of the side sheets 14 that are outward in the width direction Y from the standing fulcrums 16b of the leg side gathers 60, and the LG stretchable members 50 (stretchable members) disposed therebetween. The LG section 15 includes leg gathers that stretch in the longitudinal direction X (portions that shrink in a wrinkled shape due to the stretching of the LG stretchable members 50).

[0061] The LSG portion 16 is mainly formed by a portion of the side sheet 14 that is more inward in the width direction Y than the upright support point 16b, and an LSG elastic member 61 held by the side sheet 14 (folded portion). The LSG portion 16 includes leg side gathers 60 that stretch in the longitudinal direction X (portions that shrink in a wrinkled shape due to the stretching of the LSG elastic member 61).

[0062] Each of the pair of LG portions 15 is provided along an edge portion 10a of the main body portion 10 in the width direction Y. Each LG portion 15 is provided outside the LSG portion 16, sandwiching the upright fulcrum 16b of the LSG portion 16. Each LG stretchable member 50 provided in each LG portion 15 is arranged extending in the longitudinal direction X at both side edges of the main body portion 10 in the width direction Y (portions closer to the edge portion 10a than the center position of the main body portion 10 in the width direction Y), and has at least one stretchable portion 51 that stretches the main body portion 10 in the longitudinal direction X. The stretchable portion 51 is configured to contract in the longitudinal direction X at least in the crotch portion 103. In this embodiment, as shown in FIG. 1 , the stretchable portion 51 extends along the longitudinal direction X from the ventral portion 101 to the dorsal portion 102.

[0063] In this embodiment, each LG elastic member 50 has a plurality of elastic sections 51 (first elastic sections 511 and second elastic sections 512). As an example, the first elastic sections 511 and the second elastic sections 512 are rubber threads. The first elastic section 511 is arranged at the innermost position in the width direction Y among the plurality of elastic sections 51. The second elastic section 512 is arranged at a distance from the first elastic section 511 in the width direction Y and further outward in the width direction Y than the first elastic section 511. As an example, the distance w3 between the inner ends of the pair of first elastic sections 511 in the width direction Y is 150 mm.

[0064] Each LSG portion 16 extends in the longitudinal direction X from the ventral portion 101 to the dorsal portion 102. Both ends of the LSG portion 16 (side sheet 14) in the longitudinal direction X are fixed to the ventral portion 101 and the dorsal portion 102. More specifically, both ends of the LSG portion 16 in the longitudinal direction X are provided with fixing regions B (rectangular regions indicated by diagonal hatching in FIG. 1 ) where the LSG portion 16 and the topsheet 11 are fixed to each other. The LSG portion 16 and the topsheet 11 are fixed (adhered) to each other in the fixing regions B by, for example, bonding with an adhesive or the like, ultrasonic bonding, heat fusion bonding with an embossing roll, or the like.

[0065] The upright fulcrum 16b of the LSG portion 16 extends in the longitudinal direction X from the ventral portion 101 to the dorsal portion 102. As shown in FIGS. 1, 3, and 4, in this embodiment, the upright fulcrum 16b extends in the longitudinal direction X over the entire area of ​​the main body portion 10 in the longitudinal direction X. The upright fulcrum 16b is formed by an adhesive portion that bonds the side sheet 14 and the top sheet 11. The distance w2 between the pair of upright fulcrums 16b in the width direction Y is, for example, 135 mm.

[0066] As described above, the LSG portion 16 has both ends in the longitudinal direction X fixed in the fastening regions B of the abdominal portion 101 and the back portion 102, respectively, and forms leg side gathers 60 that are configured to stand up when contracted in the longitudinal direction X. More specifically, the LSG portion 16 has an LSG elastic member 61 extending along the longitudinal direction X between a pair of fastening regions B provided at both ends in the longitudinal direction X. As an example, the LSG elastic member 61 is configured from one or more (one in this embodiment) elastic threads. The leg side gathers 60 (portions of the LSG portion 16 between the pair of fastening regions B) are configured to stand up when the LSG elastic member 61 contracts in the longitudinal direction X. When worn, the LSG elastic member 61 contracts, causing the leg side gathers 60 to stand up, thereby preventing body waste from leaking out of the main body portion 10 (side leakage). That is, when the LSG portion 16 is in an upright state, a leakage-proof cuff is formed in the crotch portion 103 to prevent excrement from leaking out along the surface of the topsheet 11 .

[0067] The outer cover sheet 122 (back sheet 12) is provided with connecting portions 70 configured to be connectable to the diaper cover 2. As shown in FIGS. 1 and 2 , in this embodiment, two connecting portions 70 are provided near each end of the main body portion 10 in the longitudinal direction X. The term "connect" means to fix the main body portion 10 to the diaper cover 2 so that the main body portion 10 can be detachably attached, and includes various means such as engagement and adhesion. The connecting portions 70 may be formed, for example, by engaging hooks (e.g., a region including multiple pins (hook structures) with claws at their tips), an adhesive sheet, or the like. In this embodiment, each connecting portion 70 is formed by an adhesive sheet. Each connecting portion 70 is formed in a rectangular shape whose length in the width direction Y is longer than its length in the longitudinal direction X. One connecting portion 70 is provided near the ventral end of the ventral portion 101, and the other connecting portion 70 is provided near the dorsal end of the dorsal portion 102.

[0068] [Diaper cover] Next, the diaper cover 2 to which the absorbent pad 1 is attached will be described with reference to Figs. 5 to 8. Fig. 5 is a plan view of the diaper cover 2 as seen from the skin-facing side. Fig. 6 is a plan view of the diaper cover set 100 (the absorbent pad 1 and the diaper cover 2) in the attached state as seen from the skin-facing side. Fig. 7 is an enlarged view of the vicinity of the edge 2e of the narrowest part 2g of the diaper cover set 100 in the attached state. Fig. 8 is a diagram schematically illustrating the worn state. Fig. 5 shows the diaper cover 2 in a state where it has been stretched to a state where no wrinkles are formed (stretched state). Fig. 6 shows the attached state in which the absorbent pad 1 and the diaper cover 2 are both in a stretched state and the absorbent pad 1 is attached to the diaper cover 2. In Fig. 8, to make the positions of the first stretchable portion 511 and the second stretchable portion 512 easier to see, a portion of the main body 10 having a certain width and including these portions is shaded black.

[0069] The diaper cover 2 has an inner surface 2a that faces the back surface (exterior sheet 122) of the absorbent pad 1 when worn, and an outer surface 2b (see FIG. 8) opposite the inner surface 2a. Like the absorbent pad 1, the diaper cover 2 is divided into three sections in the longitudinal direction X into a ventral section 201 (first region), a dorsal section 202 (third region), and a crotch section 203 (second region). The ventral section 201, the crotch section 203, and the dorsal section 202 are aligned in the longitudinal direction X from the ventral side to the dorsal side of the wearer.

[0070] As shown in Fig. 6, the absorbent pad 1 is attached to the center of the diaper cover 2 in the longitudinal direction X and width direction Y. More specifically, in this specification, the attached state in which the absorbent pad 1 is attached to the diaper cover 2 means a state in which the diaper cover 2 and the absorbent pad 1 are each in a stretched state, and the absorbent pad 1 is attached to the diaper cover 2 so that the center position CP1 (see Figs. 1 and 2) of the absorbent pad 1 and the center position CP2 (see Fig. 5) of the diaper cover 2 overlap.

[0071] The center position CP1 of the absorbent pad 1 is the position where a line L1 passing through the center of the width direction Y of the absorbent pad 1 and parallel to the longitudinal direction X intersects with a line L2 passing through the center of the longitudinal direction X of the absorbent pad 1 and parallel to the width direction Y when the absorbent pad 1 is in an extended state (FIGS. 1 and 2). Similarly, the center position CP2 of the diaper cover 2 is the position where a line L3 passing through the center of the width direction Y of the diaper cover 2 and parallel to the longitudinal direction X intersects with a line L4 passing through the center of the longitudinal direction X of the diaper cover 2 and parallel to the width direction Y when the diaper cover 2 is in an extended state (FIG. 5).

[0072] In this embodiment, in the worn state (FIG. 6), both ends of the absorbent pad 1 in the longitudinal direction X protrude outward from both ends of the diaper cover 2 in the longitudinal direction X, but they may overlap with both ends of the diaper cover 2 in the longitudinal direction X, or may be located inward from both ends of the diaper cover 2 in the longitudinal direction X.

[0073] The absorbent pad 1 is placed on the diaper cover 2 so that the outer cover sheet 122 faces the inner surface 2a. In this way, the absorbent pad 1 is attached to the diaper cover 2. In this embodiment, the two connecting portions 70 provided on the outer cover sheet 122 are connected to the inner surface 2a of the diaper cover 2, thereby attaching the absorbent pad 1 to the diaper cover 2.

[0074] Fixed portions 2c are provided at both ends in the width direction Y of the inner surface 2a of the back side portion 202. The fixed portions 2c are formed, for example, by hook portions of a hook-and-loop fastener, snap buttons (one of the convex portion and concave portion), etc. Furthermore, fixed portions 2d corresponding to the fixed portions 2c are provided at both ends in the width direction Y of the outer surface 2b of the abdominal side portion 201. The fixed portions 2d are formed, for example, by loop portions of a hook-and-loop fastener, snap buttons (the other of the convex portion and concave portion), etc. When worn, each fixed portion 2c is connected to each fixed portion 2d. As a result, edge portions 2e that become leg opening edges are formed at the side edges in the width direction Y of the crotch portion 203.

[0075] As shown in Fig. 8, the edge 2e of the diaper cover 2 forms an opening through which the leg H1 (thigh) of the wearer H is inserted when the diaper cover 2 is worn. Fig. 8 is a view of the base of the right leg H1 of the wearer H when the diaper cover 2 is worn, viewed from the front of the wearer H. A stretchable member 2f that contracts along the edge 2e of the diaper cover 2 is provided in a portion along the edge 2e. The stretchable member 2f may be, for example, rubber thread or a stretchable sheet.

[0076] When the diaper cover 2 is worn (FIG. 6), it has a narrowest portion 2g that faces the crotch portion 103 of the absorbent pad 1 and is the portion with the shortest length in the width direction Y. Typically, the narrowest portion 2g is a portion that belongs to the crotch portion 203 of the diaper cover 2, as shown in FIG. 5, and is the narrowest (smallest) portion. The diaper cover 2 is an example of a diaper cover that falls within a group of diaper covers in which the width w4 of the narrowest portion 2g in the width direction Y is in the range of 110 mm to 160 mm (preferably, 120 mm to 140 mm). For example, the width w4 of the narrowest portion 2g of the diaper cover 2 is 145 mm. The above range of width w4 is based on the results of research into infant clothing design (for example, "Basic Research into Infant Clothing Design (1st Report) On Infant Growth, Yanagisawa Sumiko, Amano Setsuko, Ishii Manzuko, Isotani Fujieda, Iizuka Sachiko, Journal of Home Economics 26(4), 297-302, 1975, Japan Home Economics Association, etc.").

[0077] At least one stretchable portion 51 (in this embodiment, at least one of the first stretchable portion 511 and the second stretchable portion 512) of the absorbent pad 1 and the main body portion 10 are configured so that, among the group of diaper covers, there is a diaper cover that satisfies the following positional relationship condition C1.

[0078] (Positional condition C1) In the worn state (FIG. 6), the inner edge portion in the width direction Y of at least one stretchable portion 51 is disposed further outward in the width direction Y than the edge portion 2e of the narrowest portion 2g.

[0079] In this embodiment, both the first stretchable portion 511 and the second stretchable portion 512 satisfy the positional relationship condition C1 with respect to the diaper cover 2. That is, as shown in Fig. 7, in the worn state, both the inner edge 511a of the first stretchable portion 511 and the inner edge 512a of the second stretchable portion 512 are positioned outward in the width direction Y from the edge 2e of the narrowest portion 2g.

[0080] According to the above configuration, when the absorbent pad 1 is attached to at least one (one type of) diaper cover (in this embodiment, the diaper cover 2) included in the diaper cover group, the inner edges 511a, 512a in the width direction Y of at least one stretchable section 51 (in this embodiment, both the first stretchable section 511 and the second stretchable section 512) can be positioned outward in the width direction Y from the edge 2e of the narrowest section 2g of the diaper cover 2. This allows uneven wrinkles (at least part of the leg gathers) (see FIG. 8 ) formed by the stretching of the stretchable section 51 to be formed outward from the edge 2e of the narrowest section 2g of the diaper cover 2 when the diaper cover 2 is worn. As a result, when the edge 10a of the absorbent pad 1 is pulled inward due to movement of the wearer H's legs H1 or the like while the absorbent pad 1 is being worn, the uneven wrinkles function as a portion that interferes with (gets caught on) the edge 2e of the narrowest part 2g of the diaper cover 2, thereby preventing the edge 10a of the absorbent pad 1 from being pulled inward into the diaper cover 2. This prevents the edge 2e of the diaper cover 2 from becoming soiled by excrement leaking sideways from the edge 10a of the absorbent pad 1. Therefore, the absorbent pad 1 effectively prevents the diaper cover 2 from becoming soiled.

[0081] In addition, the positional relationship of the absorbent pad 1 with respect to the diaper cover 2 may be different in a strict sense between the worn state in which the absorbent pad 1 is attached to the diaper cover 2 and the worn state in which they are worn by a wearer. However, if the above-described positional relationship condition C1 is satisfied in the worn state (see Figure 6), it is expected that the same positional relationship will be established in the worn state, and therefore the above-described effect is expected to be obtained.

[0082] Furthermore, in order to configure the absorbent pad 1 so that the above-mentioned group of diaper covers includes at least one (one type) diaper cover that satisfies the above-mentioned positional relationship condition C1, the width between the outermost stretchable portions 51 in the width direction Y (in this embodiment, the distance between the inner edges 512a of the two left and right second stretchable portions 512) should be greater than the minimum value (lower limit) of the width w4 of the narrowest portion 2g of the above-mentioned group of diaper covers. Furthermore, in order to configure the absorbent pad 1 so that all types of diaper covers included in the above-mentioned group of diaper covers satisfy the above-mentioned positional relationship condition C1, the width between the outermost stretchable portions 51 in the width direction Y should be greater than the maximum value (upper limit) of the width w4 of the narrowest portion 2g of the above-mentioned group of diaper covers.

[0083] In this embodiment, the absorbent pad 1 also satisfies the following positional relationship condition C2.

[0084] (Positional condition C2) In the worn state (FIG. 6), the inner edge 511a of the first stretchable portion 511 (the innermost stretchable portion 51) is disposed further outward in the width direction Y than the edge 2e of the narrowest portion 2g.

[0085] A configuration that satisfies the positional relationship condition C2 allows the multiple stretchable sections 51 (first stretchable section 511 and second stretchable section 512) to be positioned outward in the width direction Y from the edge 2e of the narrowest section 2g of the diaper cover 2 when the diaper cover 2 is worn. Furthermore, the mutual interaction of the stretchable sections 51 between adjacent first stretchable sections 511 and second stretchable sections 512 allows for the formation of wrinkles that are wider in the width direction Y than wrinkles formed by a single stretchable section 51, and that are more likely to interfere with the edge 2e of the diaper cover 2. As a result, the edge 10a of the absorbent pad 1 is more effectively prevented from being pulled inward into the diaper cover 2, thereby more effectively preventing the diaper cover 2 from becoming soiled.

[0086] In order to configure the absorbent pad 1 so that the group of diaper covers includes at least one (one type) diaper cover that satisfies the positional relationship condition C2, the distance w3 between the inner edge portions 511a of a pair of first stretchable portions 511 may be made larger than the minimum value (lower limit) of the width w4 of the narrowest portion 2g of the group of diaper covers. In addition, in order to configure the absorbent pad 1 so that all types of diaper covers included in the group of diaper covers satisfy the positional relationship condition C1, the distance w3 may be made larger than the maximum value (upper limit) of the width w4 of the narrowest portion 2g of the group of diaper covers.

[0087] The stretching force of the first stretchable portion 511 and the stretching force of the second stretchable portion 512 may be different from each other. Here, the stretching force refers to the strength of the force that causes the stretchable portion 51 to contract in the longitudinal direction X in a stretched state. The stretching force of the stretchable portion 51 may be adjusted, for example, by the material of the member constituting the stretchable portion 51, or by the length (magnification) by which the stretchable portion 51 is stretched when fixed to the main body portion 10 in a stretched state. With this configuration, by making the stretching force of the first stretchable portion 511 different from the stretching force of the second stretchable portion 512, it is possible to form wrinkles with a non-uniform (distorted) shape between the first stretchable portion 511 and the second stretchable portion 512. As a result, it is possible to more suitably form wrinkles that have a large interference effect with the edge portion 2e of the diaper cover 2.

[0088] The stretching force of the first stretchable portion 511 may be higher than that of the second stretchable portion 512. According to the above configuration, by making the stretching force of the first stretchable portion 511 on the inner side (closer to the edge 2e of the narrowest portion 2g of the diaper cover 2 when worn) higher than that of the second stretchable portion 512 on the outer side, it is possible to form a relatively high wrinkle (wall) near the edge 2e of the narrowest portion 2g of the diaper cover 2 (near the first stretchable portion 511). This makes it possible to preferably prevent the absorbent pad 1 from shifting in position relative to the diaper cover 2 (in particular, the movement of the edge 10a of the absorbent pad 1 into the inside of the diaper cover 2). On the other hand, the wrinkles formed at a position far from the edge 2e of the narrowest part 2g of the diaper cover 2 (outside the second stretchable part 512) are relatively lower (gentler) in shape than the wrinkles formed near the first stretchable part 511, thereby improving the contact of the absorbent pad 1 with the wearer H's legs H1 (thighs).

[0089] The distance G1 (see FIG. 7) between the first stretchable portion 511 and the second stretchable portion 512 in the width direction Y may be set to 3.5 mm or more. With this configuration, a wrinkle wall having a sufficient length in the width direction Y can be formed between the first stretchable portion 511 and the second stretchable portion 512, which effectively interferes with the edge portion 2e of the diaper cover 2. As a result, the edge portion 10a of the absorbent pad 1 can be more effectively prevented from being pulled into the inside of the diaper cover 2, and soiling of the diaper cover 2 can be more effectively prevented.

[0090] In this embodiment, the absorbent pad 1 also satisfies the following positional relationship condition C3.

[0091] (Positional condition C3) In the worn state (FIG. 6), the standing support point 16b of the leg side gathers 60 is located inside in the width direction Y from the edge 2e of the narrowest part 2g.

[0092] If the standing fulcrum 16b were positioned so as to overlap the edge 2e of the diaper cover 2 in the width direction Y, the edge 2e of the diaper cover 2 would interfere with the leg side gathers 60, which could hinder the standing function of the leg side gathers 60. On the other hand, with a configuration that satisfies the above-mentioned positional relationship condition C3, the standing fulcrum 16b is positioned inside the edge 2e of the diaper cover 2, which prevents the edge 2e of the diaper cover 2 from interfering with the leg side gathers 60 and hindering the standing function of the leg side gathers 60. In other words, the leg side gathers 60, including the standing fulcrum 16b, are not pressed against the edge 2e, so the leg side gathers 60 can be satisfactorily stood up inside the edge 2e of the diaper cover 2.

[0093] 6 and 7, the inner edge portions 511a, 511b of at least one stretchable portion 51 (in this embodiment, both the first stretchable portion 511 and the second stretchable portion 512) are positioned outward in the width direction Y from the absorbent core 131. According to the above configuration, at least one stretchable portion 51 is positioned so as not to overlap with the relatively rigid absorbent core 131, which prevents the stretching of the stretchable portion 51 from being hindered by the absorbent core 131 and makes it possible to form wrinkles that have a large interference effect with the edge portion 2e of the diaper cover 2. In addition, when the absorbent core 131 has a constricted shape (for example, when the absorbent core 131 is constricted so that the length in the width direction Y of the absorbent core 131 is minimum at approximately the middle position in the longitudinal direction X of the absorbent core 131), the inner edge portions 511a, 511b of at least one stretchable portion 51 only need to be positioned outside the constricted portion in the width direction Y (the portion where the length in the width direction Y is minimum), and may be positioned so as to partially overlap with portions of the absorbent core 131 other than the constricted portion.

[0094] In this embodiment, the absorbent pad 1 also satisfies the following positional relationship condition C4.

[0095] (Positional condition C4) When worn (FIG. 6), the edge 2e of the narrowest part 2g is located outside the midpoint in the width direction Y between the absorbent core 131 and the inner edge of at least one stretchable part 51.

[0096] 7, in this embodiment, the edge 2e of the narrowest portion 2g is located outside in the width direction Y of the midpoint (straight line L5) between the end 131c of the absorbent core 131 and the inner edge 511a of the first stretchable portion 511. With the above-described configuration, the edge 2e of the narrowest portion 2g of the diaper cover 2 is adjusted to be located closer in the width direction Y to the stretchable portion 51 (in this embodiment, the first stretchable portion 511) than to the absorbent core 131 (i.e., in a portion where wrinkles are likely to form due to stretching of the stretchable portion 51). This effectively prevents the absorbent pad 1 from shifting relative to the edge 2e of the diaper cover 2 when the diaper cover 2 is worn, thereby stabilizing the position of the absorbent pad 1 relative to the diaper cover 2.

[0097] In this embodiment, the absorbent pad 1 also satisfies the following positional relationship condition C5.

[0098] (Positional condition C5) In the worn state (Figure 6), when the diaper cover 2 is divided into three equal parts in the longitudinal direction X, and the diaper cover 2 is divided into first to third regions from the ventral side to the dorsal side, the dorsal end portion 50a of the LG elastic member 50 is located in the third region of the diaper cover 2.

[0099] Here, the back-side end 50a of the LG stretchable member 50 is the end located furthest back among the back-side ends of the stretchable portions 51 included in the LG stretchable member 50. As shown in Fig. 6, in this embodiment, the positions of the back-side ends of the first stretchable portion 511 and the second stretchable portion 512 in the longitudinal direction X are the same, and therefore the back-side ends of the first stretchable portion 511 and the second stretchable portion 512 are the back-side end 50a of the LG stretchable member 50. Furthermore, the first region, second region, and third region defined in the above-mentioned positional relationship condition C5 correspond to the ventral portion 201, crotch portion 203, and back portion 202 of the diaper cover 2.

[0100] A configuration that satisfies the positional relationship condition C5 allows at least one stretchable portion 51 to easily overlap the edge portion 2e of the diaper cover 2 in the back-side portion 202 (third region) when the diaper cover 2 is worn. That is, the stretchable portion 51 can be configured to cross the edge portion 2e when viewed from the thickness direction Z. Furthermore, by overlapping the stretchable portion 51 with the edge portion 2e of the diaper cover 2, the stretchable portion 51 is positioned on both sides of the edge portion 2e of the diaper cover 2 in the width direction Y. That is, the stretchable portion 51 includes both a portion on the inside of the edge portion 2e in the width direction Y and a portion on the outside of the edge portion 2e in the width direction Y. As a result, wrinkles formed by the stretchable portion 51 are positioned on both sides of the edge portion 2e of the diaper cover 2 in the width direction Y, which more effectively prevents the absorbent pad 1 from shifting position relative to the diaper cover 2.

[0101] In this embodiment, the absorbent pad 1 also satisfies the following positional relationship condition C6.

[0102] (Positional condition C6) In the worn state (FIG. 6), the abdominal end 50b of the LG elastic member 50 is located in the first region of the diaper cover 2.

[0103] Here, the ventral end 50b of the LG stretchable member 50 is the end located most ventrally among the ventral ends of the stretchable sections 51 included in the LG stretchable member 50. As shown in Figure 6, in this embodiment, the positions of the ventral ends of the first stretchable section 511 and the second stretchable section 512 in the longitudinal direction X are the same, and therefore the ventral ends of the first stretchable section 511 and the second stretchable section 512 are the ventral end 50b of the LG stretchable member 50.

[0104] A configuration that satisfies the above-mentioned positional relationship condition C6 allows the stretchable portions 51 to overlap the edge portions 2e of the diaper cover 2 even in the ventral portion 201 (first region) when the diaper cover 2 is worn. As a result, wrinkles formed by stretching of the stretchable portions 51 are positioned on both sides of the edge portions 2e of the diaper cover 2 in the width direction Y in both the dorsal portion 202 (third region) and the ventral portion 201 (first region), which further effectively prevents the absorbent pad 1 from shifting position relative to the diaper cover 2.

[0105] As shown in Fig. 6, a cloth diaper cover 2 and an absorbent pad 1 that is attached to the diaper cover 2 are combined to form a diaper cover set 100. In the diaper cover set 100, when the absorbent pad 1 is attached to the diaper cover 2 so that the center positions CP1, CP2 of the absorbent pad 1 and the diaper cover 2 overlap, the narrowest portion 2g is defined as the portion of the diaper cover 2 that faces the crotch portion 103 of the absorbent pad 1 and has the shortest length in the width direction Y. When defined in this way, in the attached state (Fig. 6), the inner edge in the width direction Y of at least one stretchable portion 51 is positioned outward in the width direction Y of the edge 2e of the narrowest portion 2g.

[0106] The diaper cover set 100 described above allows the inner edge in the width direction Y of at least one stretchable section 51 of the absorbent pad 1 to be positioned outward in the width direction Y of the edge 2e of the narrowest portion 2g of the diaper cover 2. This allows uneven wrinkles (at least a part of the leg gathers) formed by the stretching of the stretchable section 51 to be formed outward of the edge 2e of the narrowest portion 2g of the diaper cover 2. As a result, when the edge 10a of the absorbent pad 1 is pulled inward due to the wearer's leg movement or the like while the diaper cover 2 is being worn, the uneven wrinkles function as a part that interferes with the edge 2e of the narrowest portion 2g of the diaper cover 2, thereby preventing the edge 10a of the absorbent pad 1 from being pulled inward into the diaper cover 2. This prevents the edge 2e of the diaper cover 2 from being soiled by body waste leaking sideways from the edge 10a of the absorbent pad 1. Therefore, the diaper cover set 100 can effectively prevent the diaper cover 2 from getting dirty.

[0107] As shown in FIG. 6, in the worn state, the length in the longitudinal direction X of a portion of at least one stretchable portion 51 (in this embodiment, the second stretchable portion 512 located on the outer side in the width direction Y) that does not overlap with the diaper cover 2 in the thickness direction Z (i.e., the distance between the intersections P1 and P2 of the second stretchable portion 512 and the edge portion 2e of the diaper cover 2 when viewed from the thickness direction Z) is longer than the length in the longitudinal direction X of the portion of the stretchable portion 51 (second stretchable portion 512) that overlaps with the diaper cover 2 in the thickness direction Z (i.e., the sum of the length from the intersection P1 to the ventral end 50b of the second stretchable portion 512 and the length from the intersection P2 to the dorsal end 50a of the second stretchable portion 512).

[0108] According to the above configuration, it is possible to ensure a sufficient area for the wrinkles (uneven structure) formed by the stretchable portion 51 of the absorbent pad 1 outside the edge 2e of the leg opening portion of the diaper cover 2 (i.e., the area between the intersection points P1 and P2), thereby more effectively preventing the edge 10a of the absorbent pad 1 from being pulled inside the diaper cover 2 and more suitably preventing the diaper cover 2 from becoming soiled.

[0109] As shown in Figure 7, when worn, the distance G1 between the first stretchable portion 511 and the second stretchable portion 512 in the width direction Y is wider than the distance G2 between the inner edge 511a of the first stretchable portion 511 and the edge 2e of the narrowest portion 2g in the width direction Y.

[0110] According to the above configuration, by making the distance G1 between the first stretchable portion 511 and the second stretchable portion 512 larger relative to the distance G2 between the inner edge 511a of the first stretchable portion 511 and the edge 2e of the narrowest portion 2g, it is possible to form a wrinkle wall between the first stretchable portion 511 and the second stretchable portion 512 that is long enough in the width direction Y and has a large interference effect with the edge 2e of the diaper cover 2. As a result, it is possible to more effectively prevent the edge 10a of the absorbent pad 1 from being pulled inward of the diaper cover 2, and to more effectively prevent the diaper cover 2 from becoming soiled.

[0111] The absorbent pad 1 (main body 10 and LG elastic member 50) may be configured to satisfy the above-described positional relationship conditions (including at least the positional relationship condition C1) for any diaper cover 2 having a width w4 of the narrowest portion 2g in the range of 120 mm to 140 mm. In this case, the above-described effects can be obtained for all common diaper covers 2 having a width w4 of the narrowest portion 2g in the above range. For example, if the distance w3 between the inner ends of each of the pair of first elastic members 511 in the width direction Y is greater than the upper limit (140 mm) of the above range, the positional relationship condition C1 is satisfied. As described above, in this embodiment, the distance w3 is 150 mm, and therefore the absorbent pad 1 according to this embodiment satisfies the positional relationship condition C1 for any diaper cover 2 in the above range.

[0112] [Variations] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments. The materials and shapes of the components are not limited to those described above, and various materials and shapes can be adopted.

[0113] (First Modification) FIG. 9 is a diagram showing a worn state of a diaper cover set 100A according to a first modified example. The diaper cover set 100A differs from the diaper cover set 100 (FIG. 6) in that it includes an absorbent pad 1A instead of the absorbent pad 1. The absorbent pad 1A differs from the absorbent pad 1 in that it includes an inner stretchable member 80 that stretches the main body portion 10 in the longitudinal direction X, located inward in the width direction Y from the upright fulcrum 16b of the leg side gathers 60 of the main body portion 10 and on the non-skin-facing side of the absorber 13 (absorbent core 131). In the example shown in FIG. 9, the inner stretchable member 80 is provided in the crotch portion 103 of the absorbent pad 1A, approximately in the center in the width direction Y. As an example, the inner stretchable member 80 is composed of a pair of stretchable members 81 that face each other across the center line of the absorbent pad 1A in the width direction Y (the straight line L1 in FIGS. 1 and 2). Each stretchable portion 81 is, for example, a rubber thread having a predetermined length in the longitudinal direction X, and extends along the longitudinal direction X. Each stretchable portion 81 can be disposed, for example, between the absorber 13 and the leak-barrier sheet 121, or between the leak-barrier sheet 121 and the outer sheet 122, etc.

[0114] According to the configuration of the first modified example, a first wrinkle is formed on the outer side of the edge 2e of the narrowest portion 2g of the diaper cover 2 in the width direction Y due to the stretching of at least one stretchable portion 51 (in this example, the first stretchable portion 511 and the second stretchable portion 512), and a second wrinkle is formed on the inner side of the edge 2e of the narrowest portion 2g of the diaper cover 2 in the width direction Y due to the stretching of the inner stretchable member 80. In this way, by forming first and second wrinkle walls extending in the longitudinal direction X on both sides of the edge 2e of the narrowest portion 2g of the diaper cover 2 in the width direction Y, it is possible to effectively prevent the absorbent pad 1A from shifting in the width direction Y relative to the edge 2e of the diaper cover 2 when the diaper cover 2 is worn. In other words, it is possible to more stabilize the position of the absorbent pad 1A in the width direction Y relative to the diaper cover 2 when the diaper cover 2 is worn.

[0115] (Second Modification) Figure 10 is a diagram showing the wearing state of a diaper cover set 100B according to a second modified example. The diaper cover set 100B differs from the diaper cover set 100 (Figure 6) in that it includes an absorbent pad 1B instead of the absorbent pad 1. The absorbent pad 1B differs from the absorbent pad 1 in that it satisfies the following positional relationship condition C7 instead of the above-mentioned positional relationship condition C6.

[0116] (Positional condition C7) In the worn state (FIG. 6), the abdominal end 50b of the LG elastic member 50 is located in the second region of the diaper cover 2.

[0117] That is, in the absorbent pad 1B, when worn, the ventral end 50b of the stretchable portion 51 is located in the crotch portion 203 (second region) of the diaper cover 2. That is, the stretchable portion 51 is located in the back portion 202 and the crotch portion 203 of the diaper cover 2, and does not extend to the ventral portion 201. Therefore, as shown in Fig. 10, in the diaper cover set 10B, the ventral end 50b of the stretchable portion 51 does not reach the edge 2e of the narrowest portion 2g. In other words, when viewed from the thickness direction Z, the ventral portion of the stretchable portion 51 does not cross the edge 2e of the narrowest portion 2g.

[0118] According to the configuration of the second modified example, when the diaper cover 2 is worn, the stretchable sections 51 overlap the edges 2e of the leg openings of the dorsal section 202 (third region), while the stretchable sections 51 do not overlap the edges 2e of the diaper cover 2 in the ventral section 201 (first region). As a result, the wrinkles formed by the stretchable sections 51 on the dorsal section prevent the absorbent pad 1B from shifting position relative to the diaper cover 2, while the absorbent pad 1B on the ventral section can be configured to move relatively flexibly relative to the diaper cover 2, improving comfort for the wearer. If the position of the absorbent pad 1 is fixed too firmly relative to the diaper cover 2 on both the dorsal and ventral sides, as in the above positional relationship condition C6, the wearer may feel uncomfortable. However, by suppressing the positional shift of the absorbent pad 1B relative to the diaper cover 2 on only one of the dorsal and ventral sides (the dorsal side), it is possible to achieve both the effect of suppressing the positional shift of the absorbent pad 1B relative to the diaper cover 2 and ensuring a comfortable fit for the wearer.

[0119] (Other variations) In the above embodiment, the diaper cover sets 100 and 100A satisfy all of the positional relationship conditions C1 to C6, or the diaper cover set 100B satisfies all of the positional relationship conditions C1 to C5 and C7. However, the diaper cover sets may be configured to satisfy only some of the above-mentioned positional relationship conditions. Even in this case, the above-mentioned effects corresponding to the positional relationship conditions satisfied by the diaper cover sets are achieved.

[0120] Furthermore, the stretchable portion 51 constituting the LG stretchable member 50 is not limited to rubber thread as in this embodiment. For example, the stretchable portion 51 may be a nonwoven fabric (stretchable nonwoven fabric) that is stretchable in the longitudinal direction X, or a stretchable sheet formed by covering a plurality of elastic members (rubber thread) in a bag-like shape (i.e., a sheet member in which a sheet member and one or more elastic members contained therein are integrally bonded). That is, the LG stretchable member 50 may have a configuration in which a first stretchable portion 511 and a second stretchable portion 512 formed from the stretchable nonwoven fabric or stretchable sheet described above are arranged at an interval in the width direction Y. Furthermore, the first stretchable portion 511 and the second stretchable portion 512 may be formed from different types of materials. For example, the first stretchable portion 511 may be formed from rubber thread, while the second stretchable portion 512 may be formed from a stretchable nonwoven. Furthermore, the LG stretchable member 50 may be configured to include three or more stretchable portions. For example, one or more stretchable portions may be further arranged outward in the width direction Y from the second stretchable portion 512. Furthermore, the stretchable portion 51 may be configured by a single stretchable portion (for example, only one of the first stretchable portion 511 and the second stretchable portion 512 in the above embodiment).

[0121] Furthermore, in the above embodiment, the diaper cover 2 is a tape-type cloth undergarment, but the diaper cover 2 may also be a pants-type cloth undergarment. [Explanation of symbols]

[0122] 1, 1A, 1B...absorbent pad, 2...diaper cover, 2e...edge portion, 2g...narrowest portion, 50...LG stretchable member (stretchable member), 10...main body portion, 11...surface sheet, 12...back sheet, 16b...standing fulcrum, 50...LG stretchable member (stretchable member), 50a...dorsal end portion, 50b...ventral end portion, 51...stretchable portion, 60...leg side gathers, 80...inner stretchable portion Material, 100, 100A, 100B...diaper cover set, 101...ventral portion, 102...dorsal portion, 103...crotch portion, 131...absorbent core, 201...ventral portion (first region), 202...dorsal portion (third region), 203...crotch portion (second region), 511...first stretchable portion, 511a, 512a...inner edge portion, 512...second stretchable portion, CP1, CP2...center position.

Claims

1. An absorbent pad that is attached to a cloth diaper cover and used, a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member having at least one elastic portion disposed on both side edges of the main body portion in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction, the elastic member causing the main body portion to expand and contract in the longitudinal direction, The absorbent pad is configured such that, in an attached state in which the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the portion of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest portion, then among diaper covers whose widths are in the range of 110 mm to 160 mm, there is a diaper cover that satisfies the positional relationship condition in which, in the attached state, the inner edge in the widthwise direction of at least one of the stretchable portions is positioned outer in the widthwise direction than the edge of the narrowest portion.

2. The elastic member has at least a first elastic section disposed on the innermost side in the width direction, and a second elastic section disposed on the outer side in the width direction of the first elastic section at a distance from the first elastic section in the width direction, The absorbent pad according to claim 1 , wherein the positional relationship condition includes a condition that, in the worn state, an inner edge of the first stretchable portion in the width direction is positioned outer in the width direction than an edge of the narrowest portion.

3. The absorbent pad according to claim 2 , wherein the first elastic portion and the second elastic portion have different elastic forces.

4. The absorbent pad according to claim 3 , wherein the first elastic portion has a higher elastic force than the second elastic portion.

5. The absorbent pad according to any one of claims 2 to 4, wherein the distance between the first stretchable portion and the second stretchable portion in the width direction is 3.5 mm or more.

6. the main body portion has leg side gathers extending from the abdominal portion to the dorsal portion along the longitudinal direction, both ends of which in the longitudinal direction are fixed to the abdominal portion and the dorsal portion, and which are configured to be able to stand up by contracting in the longitudinal direction, the leg side gathers have upright fulcrums extending in the longitudinal direction on the inner side of the elastic members in the width direction, The absorbent pad according to claim 1 , wherein the positional relationship condition includes a condition that the standing fulcrum is located more inward in the width direction than an edge of the narrowest portion in the worn state.

7. 7. The absorbent pad according to claim 6, further comprising an inner stretchable member that stretches the main body portion in the longitudinal direction, the inner stretchable member being located inward in the width direction from the upright fulcrum of the leg side gathers in the main body portion and on the non-skin-facing side from the absorbent core.

8. The absorbent pad according to claim 1 , wherein the inner edge of the at least one stretchable section is positioned outward in the width direction from the absorbent core.

9. The absorbent pad of claim 1, wherein the positional relationship conditions include a condition that, in the worn state, the edge of the narrowest portion is located outside the midpoint between the absorbent core and the inner edge of the at least one stretchable portion in the width direction.

10. The absorbent pad of claim 1, wherein the positional relationship conditions include a condition that, when the diaper cover is divided into three equal parts in the longitudinal direction in order from the ventral side to the dorsal side, the dorsal end of the elastic member is located in the third region of the diaper cover.

11. The absorbent pad according to claim 10, wherein the positional relationship condition includes a condition that, in the worn state, the abdominal end of the stretchable member is located in the first region of the diaper cover.

12. The absorbent pad according to claim 10, wherein the positional relationship condition includes a condition that, in the worn state, the abdominal end of the stretchable member is located in the second region of the diaper cover.

13. An absorbent pad that is attached to a cloth diaper cover and used, a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member having at least one elastic portion disposed on both side edges of the main body portion in a width direction perpendicular to the longitudinal direction and extending in the longitudinal direction, the elastic member causing the main body portion to expand and contract in the longitudinal direction, When the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, the main body and the stretchable member are configured to satisfy a positional relationship condition in which, for any diaper cover whose width is in the range of 120 mm to 140 mm, the inner edge in the width direction of at least one stretchable portion is positioned widthwise outer than the edge of the narrowest portion when the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap.

14. A diaper cover set comprising a cloth diaper cover and an absorbent pad attached to the diaper cover, The absorbent pad comprises: a main body portion divided into three parts in the longitudinal direction of the absorbent pad, namely, a ventral portion, a dorsal portion, and a crotch portion located between the ventral portion and the dorsal portion, the main body portion having a liquid-permeable top sheet that faces the wearer's skin when worn together with the diaper cover, a liquid-impermeable back sheet that faces the diaper cover when worn, and an absorbent core that is disposed between the top sheet and the back sheet and absorbs the wearer's bodily waste; and an elastic member disposed on both side edges of the main body portion in a width direction perpendicular to the longitudinal direction, extending in the longitudinal direction, and having at least one elastic portion that expands and contracts the main body portion in the longitudinal direction, A diaper cover set in which, in an attached state in which the absorbent pad is attached to the diaper cover so that the centers of the absorbent pad and the diaper cover overlap, if the portion of the diaper cover that faces the crotch portion and has the shortest widthwise length is defined as the narrowest portion, in the attached state, the inner edge portion in the widthwise direction of at least one stretchable portion is positioned outward in the widthwise direction from the edge portion of the narrowest portion.

15. 15. The diaper cover set of claim 14, wherein, in the worn state, the longitudinal length of a portion of the at least one stretchable portion that does not overlap with the diaper cover in a thickness direction perpendicular to the longitudinal direction and the width direction is longer than the longitudinal length of a portion of the at least one stretchable portion that overlaps with the diaper cover in the thickness direction.

16. The elastic member has at least a first elastic section disposed on the innermost side in the width direction, and a second elastic section disposed on the outer side in the width direction of the first elastic section at a distance from the first elastic section in the width direction, The diaper cover set according to claim 14, wherein, in the worn state, an inner edge portion in the width direction of the first stretchable portion is positioned outward in the width direction from an edge portion of the narrowest portion.

17. 17. The diaper cover set of claim 16, wherein, in the worn state, the distance between the first stretchable portion and the second stretchable portion in the width direction is wider than the distance between the inner edge of the first stretchable portion and the edge of the narrowest portion in the width direction.

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