Absorbent pads

Abstract

To provide an absorbent pad capable of effectively improving the wearing comfort of a wearer. [Solution] The absorbent pad 10 comprises a top sheet 20, a back sheet 30, an absorbent core 41 disposed between the top sheet 20 and the back sheet 30 to absorb excrement of a wearer, and a pair of fixing parts 70 disposed on both sides in the longitudinal direction X on the back surface of the back sheet 30 for fixing the absorbent pad 10 to a diaper 1. The absorbent core 41 has deformation guide parts 90 on both sides of a center line CL1, which extend at an incline toward the inside or outside of the absorbent core 41 in the width direction Y as they move toward the center of the absorbent core 41 along the longitudinal direction X. The deformation guide parts 90 include outer deformation guide parts 91 formed to at least partially overlap with the outermost region in the longitudinal direction X when a portion of the absorbent pad 10 between the pair of fixing parts 70 is divided into four equal regions along the longitudinal direction X.

Description

[Technical field]

[0001] The present disclosure relates to absorbent pads. [Background technology]

[0002] Patent Document 1 discloses an absorbent pad to be attached to the inside of a pants-type diaper, which has a pair of slits facing each other in the width direction in the crotch area, and a pair of fold guide portions extending in the width direction so as to connect the longitudinal ends of each slit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-165810 A Summary of the Invention [Problem to be solved by the invention]

[0004] The absorbent pad can improve the fit of the absorbent core to the wearer's skin in the crotch area. However, there is room for improvement in the absorbent pad in terms of improving the fit of the absorbent pad (absorbent core) in the outer region of the crotch area (i.e., the abdominal or dorsal area). In other words, there is room for improvement in the absorbent pad in terms of providing a more comfortable fit to a wearer wearing a pants-type diaper with the absorbent pad attached thereto.

[0005] An object of the present disclosure is to provide an absorbent pad that can effectively improve the wearing comfort of a wearer. [Means for solving the problem]

[0006] The absorbent pad according to one embodiment is an absorbent pad which is attached to the inside of a pants-type disposable diaper when used, and has a longitudinal direction, a width direction, and a thickness direction which intersect with one another, and which comprises a liquid-permeable top sheet which faces the skin of a wearer when the absorbent pad is worn by a wearer together with the pants-type disposable diaper, a back sheet which faces the pants-type disposable diaper when worn, an absorbent core which is disposed between the top sheet and the back sheet and absorbs the wearer's excrement, and an absorbent core which is disposed on both sides in the longitudinal direction on the back surface of the back sheet opposite to the absorbent core side, and which is attached to the pants-type disposable diaper when used. and a pair of fixing portions for fixing the absorbent core to the absorbent core, and the absorbent core has at least one deformation guiding portion extending at an angle toward the inside or outside of the absorbent core in the width direction as it approaches the center of the absorbent core along the longitudinal direction, on both sides of a center line that passes through the center of the absorbent core in the width direction and is parallel to the longitudinal direction, and the at least one deformation guiding portion includes an outer deformation guiding portion formed so as to overlap at least partially with the outermost longitudinal region of the four regions when the portion of the absorbent pad between the pair of fixing portions is divided into four equal regions along the longitudinal direction. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an absorbent pad that can effectively improve the wearing comfort of the wearer. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view illustrating an example of a diaper to which an absorbent pad according to an embodiment is attached. [Diagram 2] FIG. 2 is a plan view of a diaper with an absorbent pad attached thereto, viewed from the skin side in an unfolded and stretched state. [Diagram 3] FIG. 2 is a plan view of the absorbent pad in a stretched state, as viewed from the skin side. [Figure 4] 4 is a schematic diagram of a cross-sectional structure of the absorbent pad taken along line IV-IV in FIG. 3. [Diagram 5] FIG. 2 is a plan view showing an example of a compression portion provided on an absorbent core. [Figure 6] FIG. 6 is a partial enlarged view of region A in FIG. 5. [Figure 7] 11 is a diagram for explaining an example of an area in which a deformation guide portion and a rigid portion are formed. FIG. [Figure 8] FIG. 11 is a plan view showing an absorbent core according to a first modified example. [Figure 9] FIG. 11 is a plan view showing an absorbent core according to a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In this specification and the accompanying drawings, at least embodiments [1] to

[20] are disclosed.

[0010] [1] An absorbent pad that is attached to the inside of a pants-type disposable diaper and has a longitudinal direction, a width direction, and a thickness direction that intersect with each other, a liquid-permeable top sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the pants-type disposable diaper; a back sheet facing the pants-type disposable diaper in the worn state; an absorbent core disposed between the top sheet and the back sheet for absorbing exudates of the wearer; a pair of fixing parts arranged on both sides in the longitudinal direction on a back surface of the back sheet opposite to the absorbent core side, for fixing the absorbent pad to the pants-type disposable diaper; The absorbent core has at least one deformation guide portion extending obliquely toward the inside or outside of the absorbent core in the width direction as it approaches the center of the absorbent core along the longitudinal direction on both sides of a center line passing through the center of the absorbent core in the width direction and parallel to the longitudinal direction, The at least one deformation guiding portion of the absorbent pad includes an outer deformation guiding portion that is formed so as to overlap at least partially with the outermost region in the longitudinal direction of the four regions when the portion of the absorbent pad between the pair of fixing portions is divided into four equal regions along the longitudinal direction.

[0011] In the absorbent pad of [1] above, outer deformation guiding parts are provided on both sides of the center line, extending at an incline in the longitudinal direction so as to overlap with the outermost region when the part between the pair of fixing parts is divided into four equal parts. As a result, when the absorbent core is worn, it is possible to ensure a sufficient space between the wearer's body and the absorbent pad, and to improve the fit between the wearer and the absorbent pad, by folding the absorbent core along the outer deformation guiding parts. For example, when the outer deformation guiding parts are provided on the front side (abdominal side) of the wearer when worn, it is possible to improve the fit on the abdominal side of the wearer, and when the outer deformation guiding parts are provided on the rear side (dorsal side) of the wearer when worn, it is possible to improve the fit on the dorsal side of the wearer. Therefore, according to the above absorbent pad, it is possible to effectively improve the fit of the wearer.

[0012] [2] The at least one deformation guiding portion includes a plurality of the outer deformation guiding portions, [1] An absorbent pad, wherein the plurality of outer deformation guiding portions include a deformation guiding portion formed so as to overlap at least partially with an outermost region among the four regions on one side of the longitudinal direction, and a deformation guiding portion formed so as to overlap at least partially with an outermost region among the four regions on the other side of the longitudinal direction.

[0013] According to the above configuration [2], the wearing comfort on both the ventral and dorsal sides of the wearer can be effectively improved.

[0014] [3] The absorbent pad of [1] or [2], wherein the outer deformation guide portion extends at an angle toward the outside in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0015] According to the configuration [3], when the absorbent pad deforms along the outer deformation guide, the width of the portion of the absorbent core located on the crotch side (longitudinally inward from the outer deformation guide) of the outer deformation guide can be secured. In other words, the portion can be prevented from folding along the center line and narrowing. This makes it possible to secure a suitable space between the absorbent pad and the wearer's body on the longitudinal inside of the outer deformation guide, and to induce a smooth deformation of the absorbent pad that matches the shape of the wearer's body.

[0016] [4] The absorbent pad of [1] or [2], wherein the outer deformation guide portion extends at an inclination toward the inside in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0017] According to the above configuration [4], when the absorbent pad deforms along the outer deformation guide, the width of the portion of the absorbent core located outside the outer deformation guide (outside the outer deformation guide in the longitudinal direction) can be secured. In other words, the portion can be prevented from folding along the center line and narrowing. This makes it possible to secure a suitable space between the absorbent pad and the wearer's body outside the outer deformation guide in the longitudinal direction, and to realize a smooth deformation of the absorbent pad that matches the shape of the wearer's body.

[0018] [5] The absorbent pad according to any one of [1] to [4], wherein the outer deformation guide portions are formed symmetrically with respect to the center line.

[0019] According to the configuration of [5] above, when the garment is worn, the left and right parts of the outer deformation guide parts sandwiching the center line of the outer deformation guide parts can receive the widthwise force applied to the absorbent core from both legs of the wearer (both sides of the crotch) evenly on the left and right. As a result, the deformation of the absorbent core in the widthwise center part caused by the movement of the wearer's legs can be stabilized. This can reduce the occurrence of discomfort when the garment is worn.

[0020] [6] The absorbent pad according to any one of [1] to [5], wherein the outer deformation guide portion is continuously formed so as to straddle the center line.

[0021] According to the above-mentioned configuration [6], since the left and right portions on either side of the center line of the outer deformation guide portion are connected, a stable fold can be formed along the outer deformation guide portion when worn. As a result, the effect of improving the wearing comfort achieved by inducing the deformation of the absorbent core along the outer deformation guide portion as described above can be preferably obtained.

[0022] [7] The at least one deformation guiding portion includes an inner deformation guiding portion arranged at a predetermined interval on the inside in the longitudinal direction from the outer deformation guiding portion, The absorbent pad of any of [1] to [6], wherein the inner deformation guide portion is formed so as to overlap at least a portion of the outermost region in the longitudinal direction of the absorbent pad when the absorbent pad is divided into three equal regions in the longitudinal direction.

[0023] According to the above-mentioned configuration [7], it is possible to form stepwise folds in the absorbent core along the outer deformation guide portion and the inner deformation guide portion on the ventral or dorsal side of the wearer when the absorbent pad is worn. As a result, it is possible to preferably enhance the effects of securing a sufficient space between the wearer's body and the absorbent pad and improving the fit between the wearer and the absorbent pad as described above.

[0024] [8] The absorbent pad of [7], wherein when the portion of the absorbent core between the pair of fixed portions is divided into four equal regions along the longitudinal direction, the inner deformation guide portion is formed so as to overlap at least partially with the outermost region in the longitudinal direction among the four regions.

[0025] According to the configuration [8] above, by positioning the inner deformation guiding portion relatively farther outward in the longitudinal direction so as to overlap with the outermost region divided into four equal parts, similar to the outer deformation guiding portion, the effects achieved by the outer deformation guiding portion and the inner deformation guiding portion described above can be further enhanced.

[0026] [9] An absorbent pad according to [7] or [8], wherein each of the outer deformation guiding portions and the inner deformation guiding portions extends at an angle toward the outside in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0027] According to the above configuration, it is possible to obtain both of the effects [3] and [7] above.

[0028]

[10] An absorbent pad according to [9], wherein a first angle formed between a portion of the outer deformation guiding portion arranged on one side of the width direction with respect to the center line and a portion of the outer deformation guiding portion arranged on the other side of the width direction with respect to the center line is larger than a second angle formed between a portion of the inner deformation guiding portion arranged on one side of the width direction with respect to the center line and a portion of the inner deformation guiding portion arranged on the other side of the width direction with respect to the center line.

[0029] In the above-mentioned configuration

[10] , two deformation guiding parts (an outer deformation guiding part and an inner deformation guiding part) are provided, which are formed so that the angle gradually increases from the center of the absorbent core toward the outside in the longitudinal direction. This makes it possible to more stably cause the deformation of the absorbent core along the two deformation guiding parts (i.e., the folding deformation in which the angle gradually increases toward the outside in the longitudinal direction). As a result, it is possible to further enhance the effects of the outer deformation guiding part and the inner deformation guiding part described above.

[0030]

[11] The outer deformation guide portion extends in the longitudinal direction at an incline toward the outside in the width direction as it approaches the center of the absorbent core, The absorbent pad of [7] or [8], wherein the inner deformation guide portion extends at an angle inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0031] According to the above-mentioned configuration

[11] , the following effects can be obtained by inducing the deformation of the absorbent core along the outer deformation inducing portion and the inner deformation inducing portion. For example, when the absorbent core is folded along the outer deformation inducing portion and the inner deformation inducing portion so that the portion of the absorbent core between the outer deformation inducing portion and the inner deformation inducing portion is convex toward the skin side, the portion can be suitably attached to the skin of the wearer. This can improve the fit. On the other hand, when the absorbent core is folded along the outer deformation inducing portion and the inner deformation inducing portion so that the portion of the absorbent core between the outer deformation inducing portion and the inner deformation inducing portion is convex toward the non-skin side, a sufficient space can be suitably secured between the outer deformation inducing portion and the inner deformation inducing portion. This can suppress the occurrence of stuffiness and rashes caused by excessive adhesion between the wearer's skin and excrement.

[0032]

[12] The outer deformation guide portion extends in the longitudinal direction and inwardly in the width direction toward the center of the absorbent core, The absorbent pad of [7] or [8], wherein the inner deformation guide portion extends at an angle toward the outside in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0033] According to the configuration

[12] above, when worn, the inner deformation guiding portion can provide the effect [3] described above, and the outer deformation guiding portion can provide the effect [4] described above.

[0034]

[13] A pair of notches are provided on both side edges of the absorbent core in the width direction so as to be partially recessed inward in the width direction, An absorbent pad according to any one of [1] to

[12] , wherein an outer end portion of the deformation guide portion that is located outermost in the width direction is arranged so as not to overlap with the pair of notches in the width direction.

[0035] According to the configuration of

[13] , the force generated inward in the width direction from the notch due to the movement of the wearer's legs is less likely to be transmitted to the outer end portion, which is the starting point of the deformation of the absorbent core along the deformation guide portion, thereby making it possible to suppress the absorbent core from being distorted due to instability in the folding action of the absorbent core starting from the outer end portion of the deformation guide portion. This makes it possible to stably fold and deform the absorbent core along the deformation guide portion. As a result, the effects of the deformation guide portion as described above can be preferably obtained.

[0036]

[14] The absorbent pad of

[13] , wherein the entire deformation guide portion is positioned so as not to overlap the pair of notches in the width direction.

[0037] According to the configuration

[14] above, the effect of

[13] above can be further enhanced.

[0038]

[15] An absorbent pad according to

[13] , wherein an inner end portion of the deformation guide portion that is located innermost in the width direction is arranged so as to overlap with the pair of notches in the width direction.

[0039] In order to appropriately induce the folding action of the absorbent core along the deformation guide, it may be effective to transmit a force from the outside in the width direction (i.e., a force that triggers the folding action) to the vicinity of the inner end of the deformation guide. Therefore, according to the configuration of

[15] above, the force generated on the inside in the width direction from the notch due to the movement of the wearer's legs is appropriately transmitted to the vicinity of the inner end of the deformation guide, so that the absorbent core can be stably folded along the deformation guide.

[0040]

[16] The absorbent core comprises: a pair of slits extending in the longitudinal direction on both sides in the width direction, the slits being provided so as to overlap with a central region when the absorbent pad is divided into three equal parts in the longitudinal direction; A pair of fold guide portions connecting the longitudinal ends of the pair of slits on both sides in the longitudinal direction, The absorbent pad according to any one of [1] to

[15] , wherein each of the pair of fold guide portions extends at an incline so as to move inward in the longitudinal direction as it moves outward from the center line in the width direction.

[0041] According to the configuration of

[16] , in the worn state, it is possible to guide the deformation of the region sandwiched between the pair of slits and the pair of fold guides so that it becomes convex toward the skin side. This makes it easier to bring the crotch part of the absorbent core closer to the wearer's excretory opening, which allows the wearer to absorb excrement more quickly and reduce discomfort caused by the excrement. On the other hand, if the effect of the deformation of the absorbent core in the crotch part is directly transmitted to the outside (ventral side or back side) in the longitudinal direction, the absorbent core may not conform to the wearer's body on the ventral side or back side, which may impair the fit of the absorbent pad. In the absorbent pad, in addition to the pair of slits and the pair of fold guides, the deformation guides are provided at positions outside the pair of slits and the pair of fold guides in the longitudinal direction. This makes it possible to obtain the effect of the deformation of the absorbent core in the crotch part by the pair of slits and the pair of fold guides, while providing the wearer with a comfortable fit on the ventral side or back side by the deformation guides.

[0042]

[17] The absorbent pad of any of [1] to

[16] , wherein the range in the width direction in which the deformation guide portion is provided is included in the range between both ends of the pair of fixing portions in the width direction.

[0043] If the folding deformation of the absorbent pad along the above-mentioned deformation guide portion spreads too far near the widthwise end of the absorbent core, the adhesion between the absorbent pad and the pants-type disposable diaper may be impaired at the widthwise end of the absorbent core, or the fit of the absorbent pad to the wearer's body may be impaired. According to the configuration of

[17] above, the range in which the folding deformation along the deformation guide portion occurs is limited to a certain range of the absorbent core in the width direction (between both ends of the pair of fixing parts), thereby making it possible to avoid the above-mentioned problems.

[0044]

[18] A compressed portion formed by compressing a part of the absorbent core in the thickness direction is provided at least in an outer region on the outer side of the pair of slits in the width direction, The absorbent pad of

[16] or

[17] , wherein the area ratio of the compressed portions in the outer region is greater than the area ratio of the compressed portions in the inner region on the inside of the pair of slits in the width direction.

[0045] According to the configuration of

[18] above, the compression portion can effectively increase the rigidity of the outer region on the outer side of the pair of slits in the width direction. This makes it possible to effectively transmit the force from the outer side to the inner side in the width direction, which is generated on the absorbent pad due to the movement of the wearer's legs, to the outer region of the absorbent core. As a result, the absorbent core can be stably deformed along the pair of slits so that the inner region sandwiched between the pair of slits becomes convex toward the skin side. This enhances the effect of

[16] above.

[0046]

[19] The compressed portion has a rigid portion including a width rigid portion in the outer region, the compressed portion extending in the width direction, The widthwise rigid portion is inclined at an angle of 45 degrees or more with respect to the longitudinal direction.

[18] The absorbent pad, wherein the rigid portion is arranged so as not to overlap with the deformation guide portion and an extension line along the direction in which the deformation guide portion extends.

[0047] According to the above-mentioned configuration

[19] , by not providing a rigid portion on the deformation guide portion or on its extension line, it is possible to avoid the rigid portion hindering the folding deformation of the absorbent core caused by the deformation guide portion. As a result, it is possible to achieve both the above-mentioned effects of the deformation guide portion and the above-mentioned effects of the rigid portion (compression portion), and to provide the wearer with a more comfortable fit of the absorbent pad.

[0048]

[20] An absorbent pad that is attached to the inside of a pants-type disposable diaper and has a longitudinal direction, a width direction, and a thickness direction that intersect with each other, a liquid-permeable top sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the pants-type disposable diaper; a back sheet facing the pants-type disposable diaper in the worn state; an absorbent core disposed between the top sheet and the back sheet for absorbing exudates of the wearer; The absorbent core has at least one deformation guide portion extending obliquely toward the inside or outside of the absorbent core in the width direction as it approaches the center of the absorbent core along the longitudinal direction on both sides of a center line passing through the center of the absorbent core in the width direction and parallel to the longitudinal direction, The at least one deformation guiding portion of the absorbent pad includes an outer deformation guiding portion that is formed so as to overlap at least partially with an outermost region in the longitudinal direction of the four regions when the absorbent pad is divided into four equal regions along the longitudinal direction.

[0049] According to the above configuration, it is possible to obtain the same effect as [1] above.

[0050] [Embodiment] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or corresponding elements are designated by the same reference numerals, and duplicated description will be omitted.

[0051] [Pants-type disposable diapers (Diapers 1)] FIG. 1 is a schematic perspective view of a diaper 1 on which an absorbent pad 10 according to an embodiment is attached. FIG. 2 is a plan view of the diaper 1 on which the absorbent pad 10 is attached, viewed from the skin side in an unfolded and stretched state. The diaper 1 is a pants-type disposable diaper, and has a ventral waist portion 1A located in front of the wearer (ventral side), a rear waist portion 1B located behind the wearer (back side), and a crotch portion 1C located in the crotch portion of the wearer. The diaper 1 has an exterior body 2 constituting the ventral waist portion 1A and the rear waist portion 1B, and an absorbent body 3 having an absorbent core 4 that absorbs excrement such as urine. As shown in FIG. 2, the diaper 1 is worn by a wearer with the absorbent pad 10 attached inside the diaper 1, and the diaper 1 can be used continuously by replacing only the absorbent pad 10 after the wearer excretes, so that the diaper 1 can be used for a long time. In addition, Figure 2 shows the state in which the outer casing 2 has been cut along a pair of side seal portions 2a of the outer casing 2 located on both the left and right sides of the wearer when the diaper 1 is worn, and the diaper 1 has been stretched to a state in which no wrinkles are formed.

[0052] In this embodiment, the "wearer" is a person who wears the diaper 1 with the absorbent pad 10 attached. The "skin side" is the side facing the wearer's skin when the absorbent pad 10 is worn by the wearer together with the diaper 1 (hereinafter referred to as the "worn state"). The "non-skin side" is the side facing away from the wearer's skin when worn. The "stretched state" of the absorbent pad 10 is the state in which the absorbent pad 10 is stretched without wrinkles. More specifically, the stretched state is the state in which the dimensions of each member constituting the absorbent pad 10 are stretched until they are approximately equal to the dimensions of the member alone. The longitudinal direction of the absorbent pad 10 in the stretched state (see FIG. 2) is represented as the "longitudinal direction X", the lateral direction of the absorbent pad 10 perpendicular to the longitudinal direction X is represented as the "width direction Y", and the direction perpendicular to the longitudinal direction X and the width direction Y is represented as the "thickness direction Z". The longitudinal direction X is a direction extending from the front side (ventral side) of the wearer's body to the rear side (dorsal side) of the body. The width direction Y is a direction that coincides with the left-right direction of the wearer. The thickness direction Z is a direction in which the materials constituting the absorbent pad 10 (such as the top sheet 20, back sheet 30, and absorber 40 described below) are layered. The thickness direction Z is also a direction in which the absorbent pad 10 and the diaper 1 face each other when the absorbent pad 10 is attached to the diaper 1.

[0053] [Absorbent pad] Fig. 3 is a plan view of the absorbent pad 10 in a stretched state, as viewed from the skin side. Fig. 4 is a schematic diagram of the cross-sectional structure of the absorbent pad 10 taken along line IV-IV in Fig. 3. As shown in Figs. 3 and 4, the absorbent pad 10 has a shape that is approximately line-symmetrical with respect to a center line CL1 that is parallel to the longitudinal direction X and that divides the absorbent pad 10 into two equal parts in the width direction Y. The absorbent pad 10 also has a shape that is approximately line-symmetrical with respect to a center line CL2 that is parallel to the width direction Y and that divides the absorbent pad 10 into two equal parts in the longitudinal direction X. In the following description, the part of the absorbent pad 10 that is anterior (ventral) to the center line CL2 is defined as a front side portion 10F, and the part that is posterior (dorsal) to the center line CL2 is defined as a rear side portion 10R. However, in this embodiment, as described above, the absorbent pad 10 has a shape that is symmetrical with respect to both the center lines CL1 and CL2, and therefore the front portion 10F and the rear portion 10R are merely a convenient division based on the state in which the absorbent pad 10 is attached to the diaper 1 for use. In other words, when the absorbent pad 10 is attached to the diaper 1 with the longitudinal direction X of the absorbent pad 10 relative to the diaper 1 reversed to the direction shown in Fig. 2, the front portion 10F and the rear portion 10R are interchanged.

[0054] The absorbent pad 10 comprises a top sheet 20, a back sheet 30, an absorbent body 40, a pair of side sheets 50, leg-hole elastic members 60, and a pair of fixing parts 70.

[0055] The top sheet 20 is a liquid-permeable sheet that faces the wearer's skin when worn. The top sheet 20 may be formed of, for example, a nonwoven fabric or woven fabric, a synthetic resin film having liquid-permeable holes, or a composite sheet of these. The top sheet 20 covers the entire skin side of the absorbent body 40.

[0056] The backsheet 30 is a sheet which faces the diaper 1 when worn. The backsheet 30 may be formed of, for example, a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet of these.

[0057] The absorbent body 40 is disposed between the top sheet 20 and the back sheet 30. As an example, the absorbent body 40 includes an absorbent core 41 and a core wrap 42 that covers the absorbent core 41. The absorbent core 41 is a member that absorbs the wearer's waste and has liquid absorption and liquid retention properties. The absorbent core 41 is a laminate of absorbent materials including, for example, ground pulp or superabsorbent polymer (SAP), or a mixture thereof. The core wrap 42 is, for example, a tissue or a nonwoven sheet. In this embodiment, when viewed from the thickness direction Z, the outer shape of the absorbent core 41 is approximately the same as the outer shape of the absorbent body 40.

[0058] The pair of side sheets 50 are arranged over the entire area in the longitudinal direction X on both sides of the absorbent pad 10 in the width direction Y so as to cover both side edges of the top sheet 20 in the width direction Y. The side sheets 50 are liquid-impermeable sheets, and may be made of, for example, a hydrophobic nonwoven fabric. The side sheets 50 extend outward in the width direction from both ends of the absorbent body 40 in the width direction Y, and are folded back on the inside of the width direction Y and on the skin side in the thickness direction Z, with both ends of the absorbent pad 10 in the width direction Y as folding positions, thereby forming a pair of leakage prevention wall parts 51. A leakage prevention wall stretchable member 52 such as rubber thread (in this embodiment, two leakage prevention wall stretchable members 52 for each leakage prevention wall part 51) is fixed to the leakage prevention wall part 51 in a stretched state along the longitudinal direction X. As the leakproof wall stretchable member 52 contracts in the longitudinal direction X, a pair of leakproof wall portions 51 rise up toward the skin at both ends of the absorbent pad 10 in the width direction Y, and function as leakproof walls (leg side gathers) of the absorbent pad 10. The absorbent pad 10 may be configured so that the leakproof wall portions 51 are formed by extending the back sheet 30 to the outside of the absorbent body 40 in the width direction Y, without providing a side sheet 50. The absorbent pad 10 may also be configured so that the leakproof wall portions 51 are not formed.

[0059] The leg elastic members 60 are provided at both end portions in the width direction Y of the absorbent pad 10, between the non-skin side of the back sheet 30 and the skin side of the side sheet 50. The leg elastic members 60 are elastic members such as rubber threads that are stretchable in the longitudinal direction X. In the absorbent pad 10, the leg elastic members 60 impart stretchability around the legs, forming leg gathers. Note that in FIG. 3, the leg elastic members 60 are shown as elastic regions R3 (see FIG. 7; the effective range in which leg gathers are formed) in which the leg elastic members 60 are stretchable.

[0060] The pair of fixing parts 70 are fixing parts for fixing the absorbent pad 10 to the diaper 1. As an example, the fixing parts 70 are temporary fixing parts for removably fixing the absorbent pad 10 to the skin side of the diaper 1. As shown in Figs. 3 and 4, the pair of fixing parts 70 are arranged on both sides in the longitudinal direction X on the non-skin side (the back side opposite to the absorbent core 41 side) of the back sheet 30. In this embodiment, the pair of fixing parts 70 are provided in positions overlapping the absorbent body 40 near both ends of the absorbent body 40 (absorbent core 41) in the longitudinal direction X. The fixing parts 70 are, for example, hook members (hook and loop fasteners) configured to engage with the top sheet of the diaper 1. However, the fixing parts 70 are not limited to the above, and various known temporary fixing means can be used. The fixing parts 70 may be, for example, a hot melt adhesive, a double-sided tape, or the like.

[0061] [Absorbent core] As shown in FIG. 3, the absorbent core 41 (absorbent 40) has a substantially hourglass shape in a plan view. The absorbent core 41 has a shape that is substantially line-symmetrical with respect to a center line CL1 in the width direction Y, and also has a shape that is substantially line-symmetrical with respect to a center line CL2 in the longitudinal direction X. The absorbent core 41 has a narrow portion M, a front portion F in front of the narrow portion M (ventral side), and a rear portion R in back of the narrow portion M (dorsal side). The narrow portion M is a constricted portion that curves toward the center in the longitudinal direction X and toward the inside in the width direction Y. The narrow portion M is located under the crotch of the wearer when worn. A cutout Fa is formed so as to be partially recessed inward in the width direction Y at both sides of the front portion F in the width direction Y. Similarly, a cutout Ra is formed so as to be partially recessed inward in the width direction Y at both sides of the rear portion R in the width direction Y, which is connected to the narrow portion M.

[0062] The absorbent core 41 has a pair of slits 81 and a pair of fold guide portions 82. As shown in Fig. 3, the pair of slits 81 are provided so as to overlap with a central region when the absorbent pad 10 is divided into thirds in the longitudinal direction X (region A32 when the absorbent pad 10 is divided into thirds A31, A32, and A33 from the ventral side along the longitudinal direction X). The pair of slits 81 are provided on both sides in the width direction Y across the center line CL1, and each extends in the longitudinal direction X.

[0063] As an example, each slit 81 curves from the outside to the inside in the longitudinal direction X toward the outside in the width direction Y so that the slit 81 is located at the outermost position in the width direction Y at the position where it overlaps with the center line CL2. Each slit 81 is, for example, a through-hole that penetrates the absorbent core 41 in the thickness direction Z. However, the slit 81 may not only be a portion that is completely free of liquid-absorbent fibers such as pulp or liquid-absorbent granular material such as superabsorbent polymer (SAP), but also a portion where some liquid-absorbent fibers or liquid-absorbent granular material is present. In other words, the slit 81 may be a portion where the amount of liquid-absorbent fibers or liquid-absorbent granular material is clearly less than the surrounding area and where the rigidity is lower than the surrounding area.

[0064] The width (thickness) of the slit 81 is preferably 3 mm or more. The length of the slit 81 in the longitudinal direction X is preferably 80 mm or more. By configuring the slit 81 in this manner, it is possible to easily deform the absorbent core 41 starting from the slit 81, and to easily diffuse the excrement absorbed by the absorbent core 41 in the longitudinal direction X.

[0065] The pair of fold guide portions 82 connect the ends of the pair of slits 81 in the longitudinal direction X to each other on both sides in the longitudinal direction X. That is, the pair of fold guide portions 82 are composed of a fold guide portion 82 extending in the width direction Y so as to connect the ends of each slit 81 on one side in the longitudinal direction X to each other, and a fold guide portion 82 extending in the width direction Y so as to connect the ends of each slit 81 on the other side in the longitudinal direction X to each other.

[0066] As an example, each fold guide portion 82 is inclined toward the outside in the longitudinal direction X as it moves from the outside to the inside in the width direction Y so that it is located at the outermost position in the longitudinal direction X at the position overlapping with the center line CL1. Each fold guide portion 82 is formed, for example, by squeezing. By forming the fold guide portion 82 by squeezing in this manner, the density of the liquid absorbent fiber is increased, and the rigidity is increased compared to the area where the fold guide portion 82 is not provided. In addition, it becomes possible to easily form the fold guide portion 82. As an example, each fold guide portion 82 is formed by squeezing the absorbent core 41 in the thickness direction Z from the non-skin side to the skin side. Note that each fold guide portion 82 may be formed by squeezing the absorbent core 41 in the thickness direction Z from the skin side to the non-skin side. However, squeezing the absorbent core 41 from the non-skin side to the skin side makes it easier to fold the fold guide portion 82 so as to protrude from the skin side to the non-skin side.

[0067] The fold guide portion 82 may be any portion of the absorbent core 41 that has a different rigidity from the surrounding area. The fold guide portion 82 may be configured similarly to the above-mentioned slit 81. For example, the fold guide portion 82 may be configured to reduce the mass per unit area (g / m2) of the liquid absorbent fiber in the absorbent core 41. 2) may be configured as a portion different from the surroundings, or as a through portion through which the absorbent core 41 penetrates in the thickness direction Z.

[0068] As shown in FIG. 3, the absorbent core 41 has at least one deformation guide portion 90 extending at an angle toward the outside of the absorbent core 41 in the width direction Y as it approaches the center of the absorbent core 41 (i.e., toward the center line CL2) along the longitudinal direction X on both sides of the center line CL1. In this embodiment, the absorbent core 41 has two deformation guide portions 90 on each of the ventral side and the dorsal side. Each deformation guide portion 90 may be formed in the same manner as the above-mentioned slit 81, or may be formed in the same manner as the above-mentioned fold guide portion 82. That is, each deformation guide portion 90 may be a portion whose rigidity is lower than the surroundings by reducing the amount of liquid absorbent fibers or liquid absorbent granular material constituting the absorbent core 41 compared to the surroundings, or may be a portion whose rigidity is higher than the surroundings by being squeezed.

[0069] The plurality of deformation guiding portions 90 include an outer deformation guiding portion 91 provided at a portion spaced a certain distance outward from a central portion (a portion facing the crotch of a wearer when worn) in the longitudinal direction X. The outer deformation guiding portion 91 can be defined, for example, by the following first or second definition.

[0070] (First definition) The outer deformation inducing portion 91 is a deformation inducing portion 90 that is formed so as to at least partially overlap with the outermost regions A1, A4 in the longitudinal direction X among the four regions A1 to A4 when the portion between the pair of fixing portions 70 in the absorbent pad 10 is divided into four equal regions A1, A2, A3, A4 (see Figure 5) along the longitudinal direction X.

[0071] (Second definition) The outer deformation inducing portion 91 is a deformation inducing portion 90 that is formed so as to overlap at least partially with the outermost regions A41, A44 in the longitudinal direction X among the four regions A41 to A44 when the absorbent pad 10 is divided into four equal regions A41, A42, A43, and A44 (see Figure 3) along the longitudinal direction X.

[0072] 5, in this embodiment, according to the first definition, all of the four deformation guiding portions 90 included in the outermost ventral region A1 or the outermost dorsal region A4 correspond to the outer deformation guiding portion 91. In this example, the entirety of each deformation guiding portion 90 is included in the outermost region A1 or A4.

[0073] As shown in Figure 3, in this embodiment, according to the second definition, the two deformation guiding sections 90 located on the outermost sides in the longitudinal direction X on each of the ventral and dorsal sides correspond to the outer deformation guiding sections 91, and the other two inner deformation guiding sections 90 (i.e., the deformation guiding sections 90 that are entirely contained in the region A42 or A43) do not correspond to the outer deformation guiding sections 91.

[0074] In the case where the pair of fixing parts 70 are provided at positions overlapping the absorbent body 40 as in the present embodiment, the first definition has looser requirements for the outer deformation guiding part 91 than the second definition. The pair of fold guiding parts 82 connecting the ends of the pair of slits 81 provided to be disposed under the crotch of the wearer are necessarily provided near the center of the absorbent pad 10 in the longitudinal direction X. For this reason, the pair of fold guiding parts 82 do not overlap any of the regions A1, A4, A41, and A44. That is, although the pair of fold guiding parts 82 have the same configuration as the above-mentioned deformation guiding part 90, they do not fall under the outer deformation guiding part 91 in either the first or second definition.

[0075] In the present embodiment, as an example, the outer deformation guiding portion 91 is defined by the above-mentioned second definition. In this case, as shown in Fig. 3 and Fig. 5, the outer two deformation guiding portions 90 among the four deformation guiding portions 90, which at least partially overlap with the region A41 or A44, correspond to the outer deformation guiding portion 91.

[0076] Fig. 5 is a plan view showing an example of a compression section 100 provided in an absorbent core 41. Fig. 6 is a partial enlarged view of region A in Fig. 5. Note that the lattice-shaped compression section 101 of the compression section 100 is shown only in Fig. 5, and the lattice-shaped compression section 101 is omitted in the other figures.

[0077] As shown in FIG. 5 and FIG. 6, the absorbent core 41 is provided with a compressed portion 100 formed by compressing a part of the absorbent core 41 in the thickness direction Z. The compressed portion 100 is provided in at least an outer region Rout on the outer side of a pair of slits 81 in the width direction Y. The outer region Rout is a region surrounded by a line segment La parallel to the width direction Y connecting the ventral ends of each slit 81, a line segment Lb parallel to the width direction Y connecting the dorsal ends of each slit 81, and each slit 81. That is, the outer region Rout is a region that combines the regions formed outside each slit 81. In this embodiment, the compressed portion 100 is also provided in an inner region Rin on the inner side of the pair of slits 81. The inner region Rin is a region surrounded by the line segment La, the line segment Lb, and each slit 81.

[0078] The compressed sections 100 include lattice-shaped compressed sections 101 that are regularly arranged in a generally lattice pattern over the entire area of ​​the absorbent core 41, and rigid sections 102 that are compressed sections that are provided separately from the lattice-shaped compressed sections 101. The area of ​​the absorbent core 41 where the compressed sections 100 are provided has higher rigidity than the area of ​​the absorbent core 41 where the compressed sections 100 are not provided. In other words, a difference in rigidity occurs between the area where the compressed sections 100 are provided and the adjacent area where the compressed sections 100 are not provided.

[0079] In this embodiment, the multiple rigid portions 102 are provided only in the outer region Rout. The area ratio of the compressed portions 100 in the outer region Rout is greater than the area ratio of the compressed portions 100 in the inner region Rin by the amount of the multiple rigid portions 102 provided. The area ratio of the compressed portions 100 in the outer region Rout is "the area of ​​the region in the outer region Rout where the compressed portions 100 are provided ÷ the entire area of ​​the outer region Rout". The area ratio of the compressed portions 100 in the inner region Rin is "the area of ​​the region in the inner region Rin where the compressed portions 100 are provided ÷ the entire area of ​​the inner region Rin".

[0080] As shown in FIG. 6, the rigid portion 102 has a widthwise rigid portion 103 and a longitudinal rigid portion 104.

[0081] The rigid width portion 103 is a portion where the compressed portion extends in the width direction Y. In this embodiment, the rigid width portion 103 extends substantially parallel to the width direction Y (substantially perpendicular to the longitudinal direction X), but does not necessarily have to extend substantially parallel to the width direction Y. For example, the rigid width portion 103 may be inclined at 45 degrees or more with respect to the longitudinal direction X. However, from the viewpoint of preferably obtaining the effect of the rigid width portion 103 described below, it is preferable that the rigid width portion 103 is inclined at 60 degrees or more with respect to the longitudinal direction X, and more preferably at 80 degrees or more.

[0082] The longitudinal rigid portion 104 is a portion that is connected to the widthwise rigid portion 103 and whose compressed portion extends in the longitudinal direction X. In this embodiment, the longitudinal rigid portion 104 extends substantially parallel to the longitudinal direction X (substantially perpendicular to the widthwise direction Y), but does not necessarily have to extend substantially parallel to the longitudinal direction X. For example, the longitudinal rigid portion 104 may be inclined at 45 degrees or more with respect to the widthwise direction Y. However, from the viewpoint of preferably obtaining the effect of the longitudinal rigid portion 104 described below, the longitudinal rigid portion 104 is preferably inclined at 60 degrees or more with respect to the widthwise direction Y, and more preferably inclined at 80 degrees or more. 5, the lattice-shaped compressed portions 101 may have a portion in contact with the widthwise rigid portions 103 (a portion that appears to be connected to the widthwise rigid portions 103), but the longitudinal rigid portions 104 are intended to be compressed portions provided corresponding to the widthwise rigid portions 103, separate from the compressed portions 100 (lattice-shaped compressed portions 101) regularly arranged throughout (or most of) the absorbent core 41. In other words, the longitudinal rigid portions 104 are compressed portions arranged based on arrangement rules different from the regular arrangement followed by the lattice-shaped compressed portions 101.

[0083] The longitudinal rigid portion 104 includes a longitudinal rigid portion 104a connected to the inner end portion (the end portion closer to the slit 81) of the width rigid portion 103 in the width direction Y, and a longitudinal rigid portion 104b connected to the outer end portion of the width rigid portion 103 in the width direction Y.

[0084] As shown in FIGS. 5 to 7, in the outer regions Rout (regions on both outer sides of the pair of slits 81), a plurality of (five in this embodiment) rigid portions 102 are provided spaced apart from each other in the longitudinal direction X.

[0085] [Effects of absorbent pads] In the absorbent pad 10, outer deformation guide parts 91 are provided which extend in a V-shape or V-shape (in this embodiment, a V-shape continuing across the center line CL1) inclined in the longitudinal direction X on both sides of the center line CL1 so as to satisfy the above-mentioned first or second definition. This allows the absorbent core 41 to fold along the outer deformation guide parts 91 when worn, thereby ensuring a sufficient space between the wearer's body and the absorbent pad 10 and improving the fit between the wearer and the absorbent pad 10. In other words, according to the absorbent pad 10, it is possible to effectively improve the wearing comfort of the wearer in a portion (at least one of the ventral side and the dorsal side) relatively distant from the crotch part of the wearer.

[0086] More specifically, when the absorbent core 41 is folded so as to be convex outward (non-skin side) along the outer deformation inducing portion 91, a large space is secured inside (skin side) of the absorbent pad 10 (absorbent core 41) at the position where the outer deformation inducing portion 91 is provided, and therefore, it is possible to avoid problems (e.g., deterioration in fit, excrement absorption performance, etc.) caused by the absorbent pad 10 being too close to the wearer's skin. On the other hand, when the absorbent core 41 is folded so as to be convex inward (skin side) along the outer deformation inducing portion 91, it is possible to gently deform the absorbent pad 10 (absorbent core 41) at the position where the outer deformation inducing portion 91 is provided so as to conform to the wearer's body shape, and therefore it is possible to improve the fit of the absorbent pad 10 to the wearer's body.

[0087] When the outer deformation guide portion 91 is provided on the front side (abdominal side) of the wearer, the wearing comfort on the abdominal side of the wearer can be improved. For example, since the part around the wearer's urination opening (the part bulging outward) is located on the front side, when the wearer wears the diaper 1 with the absorbent pad 10 attached thereto (i.e., when the diaper 1 is pulled up), the absorbent core 41 is easily deformed so that the part along the outer deformation guide portion 91 becomes convex outward (non-skin side). By guiding the deformation of the absorbent core 41 in this way, a wide space can be secured between the absorbent pad 10 and the wearer's body (the part around the urination opening) near the urination opening. This can improve the wearing comfort by suppressing the occurrence of stuffiness and rash caused by excessive contact between the wearer's skin and excrement, and can suitably improve the absorbing performance of excrement. In this manner, the configuration in which the outer deformation guide portion 91 is provided on the front side (abdominal side) of the wearer is particularly effective when the pull-up action of the pants-type disposable diaper (diaper 1) is involved (i.e., when the space in front of the wearer's crotch is likely to be narrowed when pulled up). That is, the area where the outer deformation guide portion 91 is provided is likely to be pushed and spread out so as to be convex outward (non-skin side) by the area around the wearer's urination opening, which makes it easier to ensure a sufficient space in front of the wearer's crotch after the above-mentioned pull-up action is performed.

[0088] When the outer deformation guide portion 91 is provided on the rear side (back side) of the wearer, the wearing comfort on the back side of the wearer can be improved. For example, on the rear side, when the wearer wears the diaper 1 with the absorbent pad 10 attached thereto (i.e., when pulling up the diaper 1), the absorbent core 41 is likely to deform so that the portion along the outer deformation guide portion 91 becomes convex inward (skin side) (i.e., so that the absorbent pad 10 is dug into the wearer's buttocks). By guiding the deformation of the absorbent core 41 in this way, the absorbent pad 10 (absorbent core 41) can be gently deformed to fit the body shape of the wearer (shape near the buttocks), so that the fit of the absorbent pad 10 to the wearer's body can be improved. In this way, the configuration in which the outer deformation guide portion 91 is provided on the rear side (back side) of the wearer is also effective because it can induce appropriate deformation of the absorbent pad 10, especially when the pull-up action of the pants-type disposable diaper (diaper 1) is involved.

[0089] Moreover, the deformation guide 90 is formed so that the direction of inclination changes with the center line CL1 as a boundary. As a result, the deformation guide 90 defines a folding portion at the center line CL1 (the center portion in the width direction Y). More specifically, when the absorbent core 41 is deformed along the deformation guide 90, the absorbent core 41 as a whole is deformed along the center line CL1. In this way, by making it easier for the absorbent core 41 to deform along the center line CL1, the deformation of the diaper 1 at the center portion in the width direction Y and the deformation of the absorbent pad 10 (i.e., the deformation along the center line CL1) can be made to match. As a result, it is possible to make it difficult for the absorbent core 41 to be distorted, and to suppress the occurrence of a shift of the absorbent pad 10 relative to the diaper 1.

[0090] As shown in FIG. 3, in the absorbent pad 10, the plurality of deformation inducing parts 90 include a plurality of outer deformation inducing parts 91. That is, the plurality of outer deformation inducing parts 91 include a deformation inducing part 90 formed so as to overlap at least a part of the outermost region (region A1 in FIG. 5 in the first definition, region A41 in FIG. 3 in the second definition) on the ventral side (one side) in the longitudinal direction X, and a deformation inducing part 90 formed so as to overlap at least a part of the outermost region (region A4 in FIG. 5 in the first definition, region A44 in FIG. 3 in the second definition) on the dorsal side (other side) in the longitudinal direction X. That is, in the absorbent pad 10, the outer deformation inducing parts 91 are provided on both the ventral side and the dorsal side. According to the above configuration, it is possible to effectively improve the wearing comfort on both the ventral side and the dorsal side of the wearer. That is, it is possible to obtain the effects of both the case where the outer deformation inducing part 91 is provided on the ventral side and the case where it is provided on the dorsal side in the worn state.

[0091] As shown in FIG. 3, in the absorbent pad 10, the outer deformation inducing portion 91 extends inclined toward the outside in the width direction Y toward the center of the absorbent core 41 along the longitudinal direction X. In this embodiment, the outer deformation inducing portion 91 is formed in a V-shape that widens toward the center line CL2 along the longitudinal direction X. According to the above configuration, when the absorbent pad 10 is deformed along the outer deformation inducing portion 91, the width in the width direction Y of the portion of the absorbent core 41 located on the crotch side (inside the outer deformation inducing portion 91 in the longitudinal direction X) can be secured. That is, the portion can be prevented from folding and narrowing along the center line CL1. This makes it possible to secure a suitable space between the absorbent pad 10 and the wearer's body on the inside of the outer deformation inducing portion 91 in the longitudinal direction X, and to induce a gentle deformation of the absorbent pad 10 that matches the shape of the wearer's body.

[0092] As shown in Fig. 3, in the absorbent pad 10, the outer deformation guide parts 91 are formed to be line-symmetrical with respect to the center line CL1. With the above configuration, when worn, the forces in the width direction Y applied to the absorbent core 41 from both legs (both sides of the crotch) of the wearer can be received equally on the left and right sides by the parts on both sides of the center line CL1 of the outer deformation guide parts 91. As a result, it is possible to stabilize the deformation of the absorbent core 41 in the center part in the width direction Y caused by the movement of the wearer's legs. This makes it possible to reduce the occurrence of discomfort when wearing the absorbent pad.

[0093] As shown in FIG. 3, the outer deformation inducing portion 91 is continuously formed so as to straddle the center line CL1. That is, one outer deformation inducing portion 91 is provided so as to be continuously connected, and is not separated into a plurality of independent portions. According to the above configuration, the left and right portions of the outer deformation inducing portion 91 sandwiching the center line CL1 are connected, so that a stable fold can be formed along the outer deformation inducing portion 91 in the worn state. That is, in one outer deformation inducing portion 91, the force for deformation can be distributed throughout the entire outer deformation inducing portion 91 without interruption. As a result, the effect of improving the wearing comfort achieved by the deformation induction of the absorbent core 41 along the outer deformation inducing portion 91 as described above can be suitably obtained.

[0094] In addition, the outer deformation inducing portion 91 may have, for example, a first portion located on one side of the center line CL1 in the width direction Y and a second portion located on the other side of the center line CL1 in the width direction Y, and the first portion and the second portion may be separated from each other. That is, the outer deformation inducing portion 91 may be formed in a V-shape. Even in this case, the effect of improving the wearing comfort achieved by inducing the deformation of the absorbent core 41 along the outer deformation inducing portion 91 as described above can be obtained. However, from the viewpoint of preferably obtaining this effect, it is preferable that the outer deformation inducing portion 91 is formed continuously, as described above.

[0095] As shown in FIG. 3, in the absorbent pad 10, the multiple deformation inducing portions 90 include an inner deformation inducing portion 92 arranged at a predetermined interval from the outer deformation inducing portion 91 on the inside in the longitudinal direction X. When the absorbent pad 10 is divided into three equal regions A31, A32, and A33 in the longitudinal direction X, the inner deformation inducing portion 92 is formed so as to overlap at least a part with the outermost region (region A31 or A32) in the longitudinal direction X. In this embodiment, the inner deformation inducing portion 92 corresponding to the ventral outer deformation inducing portion 91 (the deformation inducing portion 90 at least partially overlapping with the region A41) is formed so as to overlap with the region A31. In addition, the inner deformation inducing portion 92 corresponding to the dorsal outer deformation inducing portion 91 (the deformation inducing portion 90 at least partially overlapping with the region A44) is formed so as to overlap with the region A33. That is, a plurality of deformation guiding parts 90 (outer deformation guiding parts 91 and inner deformation guiding parts 92) are formed in multiple stages on the back side or ventral side (both the back side and ventral side in this embodiment). According to the above configuration, it is possible to form stepwise folds in the absorbent core 41 along the outer deformation guiding parts 91 and inner deformation guiding parts 92 on the ventral side or back side of the wearer when worn. As a result, it is possible to preferably enhance the effects of ensuring a sufficient space between the wearer's body and the absorbent pad 10 and improving the fit between the wearer and the absorbent pad 10 as described above.

[0096] As shown in FIG. 5, in the absorbent pad 10, when a portion between a pair of fixing parts 70 in the absorbent core 41 is divided into four equal regions A1 to A4 along the longitudinal direction X, the inner deformation inducing portion 92 is formed so as to at least partially overlap with the outermost region A1 or A4 in the longitudinal direction X. In this embodiment, the inner deformation inducing portion 92 corresponding to the ventral outer deformation inducing portion 91 (deformation inducing portion 90 overlapping with the region A1) is formed so as to overlap with the region A1. In addition, the inner deformation inducing portion 92 corresponding to the dorsal outer deformation inducing portion 91 (deformation inducing portion 90 overlapping with the region A4) is formed so as to overlap with the region A4. According to the above-mentioned configuration, the inner deformation inducing portion 92 is disposed relatively outside in the longitudinal direction X so as to overlap with the outermost region (region A1 or A4) divided into four equal regions in the same manner as the outer deformation inducing portion 91, so that the effects of the outer deformation inducing portion 91 and the inner deformation inducing portion 92 can be further enhanced.

[0097] 3, each of the outer deformation inducing portion 91 and the inner deformation inducing portion 92 extends at an incline so as to be outward in the width direction Y as it approaches the center (center line CL2) of the absorbent core 41 along the longitudinal direction X. According to the above configuration, it is possible to obtain both the effect achieved by forming the outer deformation inducing portion 91 in a V-shape that widens as it approaches the center line CL2 along the longitudinal direction X, and the effect achieved by forming the above-mentioned deformation inducing portion 90 (the outer deformation inducing portion 91 and the inner deformation inducing portion 92) in multiple stages.

[0098] As shown in Figs. 3 and 7, a first angle θ1 formed between a portion of the outer deformation inducing portion 91 arranged on one side of the width direction Y with respect to the center line CL1 and a portion of the outer deformation inducing portion 91 arranged on the other side of the width direction Y with respect to the center line CL1 is larger than a second angle θ2 formed between a portion of the inner deformation inducing portion 92 arranged on one side of the width direction Y with respect to the center line CL1 and a portion of the inner deformation inducing portion 92 arranged on the other side of the width direction Y with respect to the center line CL1. That is, in the above-mentioned configuration, two deformation inducing portions 90 (the outer deformation inducing portion 91 and the inner deformation inducing portion 92) are provided so that the angle gradually increases from the center (the center line CL2) of the absorbent core 41 toward the outside in the longitudinal direction X. This makes it possible to more stably cause deformation of the absorbent core 41 along the two deformation inducing portions 90 (i.e., folding deformation in which the angle gradually increases toward the outside in the longitudinal direction X). As a result, the effects achieved by the outer deformation inducing portion 91 and the inner deformation inducing portion 92 described above can be further enhanced.

[0099] As shown in FIG. 3, a pair of notches are provided on both side edges in the width direction Y of the absorbent core 41 so as to be partially recessed inward in the width direction Y. In this embodiment, a pair of notches Fa is provided on the ventral side, and a pair of notches Ra is provided on the dorsal side. As shown in FIG. 7, the outer end 90a located on the outermost side in the width direction Y of each deformation guide portion 90 is arranged so as not to overlap with the pair of notches Fa, Ra in the width direction Y (i.e., the range R1 in which the notches Fa, Ra are formed in the longitudinal direction X). According to the above configuration, the force generated on the inner side in the width direction Y from the notches Fa, Ra due to the movement of the wearer's legs as a starting point is made difficult to be transmitted to the outer end 90a which is the starting position of the deformation of the absorbent core 41 along the deformation guide portion 90, and thus it is possible to suppress the occurrence of distortion in the absorbent core 41 due to instability of the folding action of the absorbent core 41 starting from the outer end 90a of the deformation guide portion 90. This allows the absorbent core 41 to be stably folded and deformed along the deformation guide portion 90. As a result, the above-mentioned effects of the deformation guide 90 can be preferably obtained.

[0100] As an example, in this embodiment, the distance in the longitudinal direction X between the area R1 and the outer end 90a of the outer deformation inducing portion 91 is set to 3 mm or more. Also, the distance in the longitudinal direction X between the area R1 and the outer end 90a of the inner deformation inducing portion 92 is set to 4 mm or more.

[0101] 7, the entire outer deformation inducing portion 91 (deformation inducing portion 90) is arranged so as not to overlap with the pair of cutouts Fa, Ra in the width direction Y. That is, in this embodiment, the outermost outer deformation inducing portion 91 among the plurality of deformation inducing portions 90 does not overlap at all with the range in which the cutouts Fa, Ra are formed in the longitudinal direction X. According to the above configuration, the above-mentioned effect can be more preferably obtained. That is, it is possible to more preferably suppress the force generated on the inside in the width direction Y with the cutouts Fa, Ra as the starting point from being transmitted to the outer deformation inducing portion 91.

[0102] As shown in FIG. 7, the inner end 90b of the inner deformation inducing portion 92 (deformation inducing portion 90) located at the innermost position in the width direction Y is arranged to overlap with the pair of notches Fa, Ra in the width direction Y. That is, in this embodiment, the portion of the inner deformation inducing portion 92 including the inner end 90b but not including the outer end 90a overlaps with the range in which the notches Fa, Ra are formed in the longitudinal direction X. In order to appropriately cause the absorbent core 41 to fold along the deformation inducing portion 90, it may be effective to transmit a force from the outside in the width direction Y (i.e., a force that triggers the above-mentioned folding motion) to the vicinity of the inner end 90b of the deformation inducing portion 90. Therefore, according to the above configuration, the force generated on the inside in the width direction Y starting from the notches Fa, Ra due to the movement of the wearer's legs is appropriately transmitted to the vicinity of the inner end 90b of the deformation inducing portion 90 (in this embodiment, the inner deformation inducing portion 92), so that the absorbent core 41 can be stably folded and deformed along the deformation inducing portion 90.

[0103] The positional relationship between the cutouts Fa, Ra and the deformation guiding portion 90 may be configured to hold for all the deformation guiding portions 90, or may be configured to hold for only one of the outer deformation guiding portion 91 and the inner deformation guiding portion 92. For example, in this embodiment, the outer deformation guiding portion 91 is arranged so as not to completely overlap with the cutout, but the inner end portion 90b of the outer deformation guiding portion 91 may be arranged so as to overlap with the cutout. Also, the inner deformation guiding portion 92 may be arranged so as not to completely overlap with the cutout.

[0104] As shown in FIG. 3, in the absorbent pad 10, the absorbent core 41 has a pair of slits 81 and a pair of fold guides 82. According to the above configuration, it is possible to deform and guide the area sandwiched between the pair of slits 81 and the pair of fold guides 82 to be convex toward the skin side when worn. This makes it easier to bring the crotch part of the absorbent core 41 closer to the wearer's excretory opening, and absorbs excrement faster, reducing discomfort caused by excrement. On the other hand, if the influence of the deformation of the absorbent core 41 in the crotch part is directly transmitted to the outside (ventral side or back side) in the longitudinal direction X, the absorbent core 41 will not conform to the wearer's body on the ventral side or back side, and the fit of the absorbent pad may be impaired. In the absorbent pad 10, the pair of slits 81 and the pair of fold guides 82 are provided with the above-mentioned deformation guides 90 at a position outside of them in the longitudinal direction X. This makes it possible to obtain the effect of deformation of the absorbent core 41 in the crotch area by a pair of slits 81 and a pair of fold guide portions 82, while providing the wearer with a comfortable fit on the ventral or dorsal side by the deformation guide portion 90.

[0105] As shown in FIG. 7, in the absorbent pad 10, the range in which the deformation guide 90 is provided in the width direction Y is included in the range between both ends of the pair of fixing parts 70 in the width direction Y (i.e., the range R2 in which the pair of fixing parts 70 are provided in the width direction Y). If the folding deformation of the absorbent pad 10 along the above-mentioned deformation guide 90 spreads too far near the end of the absorbent core 41 in the width direction Y, the adhesion between the absorbent pad 10 and the diaper 1 may be impaired at the end of the absorbent core 41 in the width direction Y, or the fit of the absorbent pad 10 to the wearer's body may be impaired. According to the above-mentioned configuration, the range in which the folding deformation along the deformation guide 90 occurs is limited to a certain range of the absorbent core 41 in the width direction Y (the range R2 between both ends of the pair of fixing parts 70), thereby making it possible to avoid the above-mentioned problems.

[0106] As shown in FIG. 5, in the absorbent pad 10, the compressed portion 100 formed by compressing a part of the absorbent core 41 in the thickness direction Z is provided in the outer region Rout on the outer side of the pair of slits 81 in the width direction Y, and the area ratio of the compressed portion 100 in the outer region Rout is larger than the area ratio of the compressed portion 100 in the inner region Rin. According to the above configuration, the compressed portion 100 can effectively increase the rigidity of the outer region Rout on the outer side of the pair of slits 81 in the width direction Y. This makes it possible to effectively transmit the force from the outside to the inside in the width direction Y generated on the absorbent core 41 due to the movement of the wearer's legs to the outer region Rout of the absorbent core 41. In addition, even when the diaper 1 is worn for a long time or the diaper 1 is raised and lowered multiple times (for example, raised and lowered for checking), the rigidity of the outer region Rout can be suitably maintained, and the outer region Rout can be prevented from twisting. As a result, the absorbent core 41 can be stably deformed along the pair of slits 81 so that the inner region Rin sandwiched between the pair of slits 81 becomes convex toward the skin side. This enhances the effect of the pair of slits 81 described above.

[0107] As shown in FIG. 7, the rigid portion 102 provided in the outer region Rout is provided so as not to overlap with the deformation guide portion 90 and the extension line along the direction in which the deformation guide portion 90 extends. In this embodiment, all the rigid portions 102 are disposed on the inside of the extension line Le along the direction in which the inner deformation guide portion 92 extends, thereby realizing the above-mentioned configuration. According to the above-mentioned configuration, by not providing the rigid portion 102 on the deformation guide portion 90 and its extension line, it is possible to prevent the rigid portion 102 from hindering the folding deformation of the absorbent core 41 caused by the deformation guide portion 90. As a result, it is possible to achieve both the above-mentioned effect of the deformation guide portion 90 and the above-mentioned effect of the rigid portion 102 (compression portion 100), and it is possible to provide the wearer with a more comfortable fit of the absorbent pad 10.

[0108] 6, in the absorbent pad 10, the compressed portion 100 includes a widthwise rigid portion 103 in which the compressed portion extends in the width direction Y in the outer region Rout. With the above-mentioned configuration, the force acting from the outside to the inside in the width direction Y of the absorbent pad 10 due to the movement of the wearer's legs can be easily transmitted to the pair of slits 81 via the widthwise rigid portion 103. As a result, the absorbent core 41 can be stably deformed along the pair of slits 81 so that the region sandwiched by the pair of slits 81 becomes convex toward the skin side.

[0109] As shown in FIG. 6, in the absorbent pad 10, the length L in the width direction Y of the rigid portion 102 is 1 / 3 or more of the minimum width w of the outer region Rout. In this embodiment, the length in the width direction Y of the outer region Rout (i.e., the length from the outer edge of the slit 81 in the width direction Y to the outer edge of the absorbent core 41 in the width direction Y) is minimum on the center line CL2. If the length L of the rigid portion 102 is insufficient, the component of the force (force toward the inside in the width direction Y) transmitted to the outer region Rout due to the movement of the wearer's legs that is dispersed in the longitudinal direction X becomes large, making it difficult to stably cause folding deformation along the pair of slits 81. In contrast, according to the above configuration, by setting the length L of the rigid portion 102 to a sufficient length with respect to the width (minimum width w) of the outer region Rout, it is possible to suppress the dispersion of the force in the longitudinal direction X and stably cause folding deformation along the pair of slits 81. From the viewpoint of enhancing the above-mentioned effects, the length L of the rigid portion 102 is preferably ½ or more, and more preferably ¾ or more, of the minimum width w of the outer region Rout.

[0110] As shown in FIG. 6, in the absorbent pad 10, at least one rigid portion 102 is provided in the outer region Rout at a position (on the center line CL2 in this embodiment) facing the outermost end (the portion bulging most outward in the width direction Y) of the pair of slits 81 in the width direction Y. In this embodiment, one rigid portion 102 is provided on the center line CL2. According to the above configuration, the rigid portion 102 is provided at a position where the length in the width direction Y from the outer end of the outer region Rout in the width direction Y to the pair of slits 81 is the shortest, that is, at a position where the force in the width direction Y caused by the movement of the wearer's legs described above is most easily transmitted, in order to facilitate the transmission of such force to the pair of slits 81, thereby making it possible to more suitably exhibit the effect of the rigid portion 102 described above.

[0111] As shown in Fig. 6, in the absorbent pad 10, the rigid portion 102 includes a longitudinal rigid portion 104. According to the above configuration, by providing the rigid portion 102 in which the longitudinal rigid portion 104 and the widthwise rigid portion 103 extending in directions intersecting each other are integrally formed, the shape stability of the rigid portion 102 can be improved. As a result, the effect of the rigid portion 102 described above can be more suitably exhibited.

[0112] 6, the rigid portion 102 has a longitudinal rigid portion 104a connected to an inner end of the widthwise rigid portion 103 in the width direction Y. According to the above configuration, the longitudinal rigid portion 104a can increase the area (width in the longitudinal direction X) when transmitting force from the rigid portion 102 to the pair of slits 81 compared to the case where only the widthwise rigid portion 103 is provided. This can make the transmission of force via the rigid portion 102 more efficient, and can cause the folding deformation of the absorbent core 41 along the pair of slits 81 to occur more stably.

[0113] 6, the rigid portion 102 has a longitudinal rigid portion 104b connected to the outer end of the widthwise rigid portion 103 in the width direction Y. According to the above configuration, the longitudinal rigid portion 104b can increase the area (width in the longitudinal direction X) of the portion in the rigid portion 102 to which the force caused by the movement of the wearer's legs is transmitted, compared to the case where only the widthwise rigid portion 103 is provided. This can make the transmission of force via the rigid portion 102 more efficient, and can cause the folding deformation of the absorbent core 41 along the pair of slits 81 to occur more stably.

[0114] 6, in the outer region Rout, the compressed portion 100 is provided with a plurality of (five in this embodiment) rigid portions 102 spaced apart from each other in the longitudinal direction X. According to the above configuration, the area (width in the longitudinal direction X) of the rigid portion 102 for transmitting the force caused by the movement of the wearer's legs to the inner portion (the pair of slits 81 side) of the absorbent core 41 can be increased compared to the case where a single rigid portion 102 is provided. This makes it possible to efficiently transmit the force via the rigid portion 102, and to more stably cause the folding deformation of the absorbent core 41 along the pair of slits 81.

[0115] The rigid portions 102 are provided with a plurality of (three in this embodiment) rigid portions 102 arranged at a distance from each other in the longitudinal direction X on the inner side (first position) in the width direction Y, and a plurality of (two in this embodiment) rigid portions 102 arranged at a distance from each other in the longitudinal direction X on the outer side (second position) in the width direction Y. The plurality of (three) rigid portions 102 arranged at the inner side and the plurality of (two) rigid portions 102 arranged at the outer side are arranged alternately along the longitudinal direction X. According to the above configuration, the combination of the plurality of rigid portions 102 arranged at the inner side and the plurality of rigid portions 102 arranged at the outer side can effectively increase the area (width in the longitudinal direction X) of the rigid portion 102 for transmitting the force caused by the movement of the wearer's legs to the inner part (the pair of slits 81 side) of the absorbent core 41 compared to the case where a single rigid portion 102 is provided. This can efficiently transmit the force via the rigid portion 102, and can more stably cause the folding deformation of the absorbent core 41 along the pair of slits 81.

[0116] As shown in FIG. 7, at least a part of the rigid portions 102 (in this embodiment, a part including the longitudinal rigid portion 104a of each of the three rigid portions 102 arranged on the inside) is provided in a region in which the pair of fixing portions 70 exists in the width direction Y (i.e., a range R2 in which the pair of fixing portions 70 are provided in the width direction Y). According to the above configuration, the absorbent pad 10 is fixed to the diaper 1 by the pair of fixing portions 70, so that the portion of the rigid portion 102 arranged between the pair of fixing portions 70 can be prevented from being distorted in the longitudinal direction X and the width direction Y. This makes it possible to efficiently transmit force via the rigid portions 102, and to more stably cause the folding deformation of the absorbent core 41 along the pair of slits 81.

[0117] As shown in FIG. 7, at least some of the rigid parts 102 (all ten rigid parts 102 in this embodiment) are provided in the stretchable region R3 in which the leg-hole stretchable member 60 can stretch in the longitudinal direction X. According to the above configuration, by including at least some of the rigid parts 102 in the range in which the contraction force in the longitudinal direction X by the leg-hole stretchable member 60 acts (i.e., the range in which leg gathers are formed), a highly rigid uneven structure can be formed by the part of the absorbent core 41 including at least some of the rigid parts 102 contracting and gathering in the longitudinal direction X. Through such a highly rigid uneven structure, the force transmitted to the inside of the absorbent core 41 in the width direction Y can be suitably transmitted to the pair of slits 81. As a result, the folding deformation of the absorbent core 41 along the pair of slits 81 can be more stably generated.

[0118] [Variations] The present disclosure is not limited to the above-described embodiment. The materials and shapes of the components are not limited to those described above, and various materials and shapes can be adopted.

[0119] (First Modification) 8 is a diagram showing an absorbent core 41A according to a first modified example. The absorbent core 41A differs from the absorbent core 41 according to the embodiment in that it has an inner deformation guide portion 92A instead of the inner deformation guide portion 92. The other configurations are the same as those of the absorbent core 41.

[0120] In the absorbent core 41A, the outer deformation guiding portion 91 extends at an incline toward the outside in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X, while the inner deformation guiding portion 92A extends at an incline toward the inside in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X.

[0121] According to the above configuration, the following effects can be obtained by inducing the deformation of the absorbent core 41 along the outer deformation inducing portion 91 and the inner deformation inducing portion 92A. For example, when the absorbent core 41 is folded along the outer deformation inducing portion 91 and the inner deformation inducing portion 92A so that the portion of the absorbent core 41 between the outer deformation inducing portion 91 and the inner deformation inducing portion 92A is convex toward the skin side (inside), the portion can be suitably attached to the skin of the wearer. This can improve the fit. On the other hand, when the absorbent core 41 is folded along the outer deformation inducing portion 91 and the inner deformation inducing portion 92A so that the portion of the absorbent core 41 between the outer deformation inducing portion 91 and the inner deformation inducing portion 92A is convex toward the non-skin side (outside), a sufficient space can be suitably secured between the outer deformation inducing portion 91 and the inner deformation inducing portion 92A. This can suppress the occurrence of stuffiness and rash caused by excessive adhesion between the wearer's skin and excrement.

[0122] (Second Modification) 9 is a diagram showing an absorbent core 41B according to a second modified example. The absorbent core 41B differs from the absorbent core 41 according to the embodiment in that it has an outer deformation guide portion 91B instead of the outer deformation guide portion 91, but is otherwise identical to the absorbent core 41.

[0123] In the absorbent core 41 described above, the outer deformation inducing portion 91 is inclined toward the outside in the width direction Y as it approaches the center (center line CL2) of the absorbent core 41 along the longitudinal direction X. In contrast, in the absorbent core 41B, the outer deformation inducing portion 91B is provided so as to extend inclined toward the inside in the width direction Y as it approaches the center (center line CL2) of the absorbent core 41 along the longitudinal direction X. According to the above configuration, when the absorbent core 41 is deformed along the outer deformation inducing portion 91B, the width in the width direction Y of the portion of the absorbent core 41 located outside the outer deformation inducing portion 91B (outside the outer deformation inducing portion 91B in the longitudinal direction X) can be secured. That is, the portion can be prevented from folding and narrowing along the center line CL1. This makes it possible to secure a suitable space between the absorbent core 41 and the wearer's body outside the outer deformation inducing portion 91B in the longitudinal direction X, and to realize a gentle deformation of the absorbent core 41 that matches the shape of the wearer's body.

[0124] In addition, in the absorbent core 41B, the outer deformation guiding portion 91B extends at an inclination toward the inside in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X, while the inner deformation guiding portion 92 extends at an inclination toward the outside in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X.

[0125] According to the above configuration, the inner deformation guiding portion 92 can obtain the same effect as that obtained by the outer deformation guiding portion 91 of the above embodiment (absorbent pad 10), and the outer deformation guiding portion 91B can obtain the effect described above.

[0126] In addition, some of the configurations in the above embodiment may be changed or deleted, and other configurations may be appropriately added to the above embodiment. For example, the notches Fa and Ra of the absorbent core 41 may be disposed in different locations from those in the above embodiment, and may have different shapes from those in the above embodiment. In addition, in the above embodiment, the notches Fa and Ra are provided one on each side in the width direction Y, but each of the notches Fa and Ra may be provided multiple times on one side in the width direction Y.

[0127] In the above embodiment, the pair of fold guide portions 82 may be omitted and only the pair of slits 81 may be provided. Even in this case, it is possible to guide the folding deformation of the absorbent core 41 along the pair of slits 81. Also, the pair of slits 81 and the pair of fold guide portions 82 do not have to be provided.

[0128] In the above embodiment, the compressed portions 100 may be omitted. In the above embodiment, the lattice-shaped compressed portions 101 are provided throughout the absorbent core 41, but there may be regions where the lattice-shaped compressed portions 101 are not provided (for example, an inner region Rin between a pair of slits 81, etc.). In the above embodiment, the rigid portions 102 are provided only in the outer region Rout, but the rigid portions 102 may also be provided in regions other than the outer region Rout (for example, the inner region Rin, etc.). Even if a portion of the rigid portions 102 is provided in the inner region Rin, the rigidity of the outer region Rout can be increased relative to the inner region Rin by making the area ratio of the compressed portions 100 in the outer region Rout larger than the area ratio of the compressed portions 100 in the inner region Rin as a whole, and the above-mentioned effect of the compressed portions 100 (particularly the rigid portions 102) can be obtained.

[0129] In the above embodiment, the deformation guiding portion 90 may be omitted. Alternatively, only one of the outer deformation guiding portion 91 and the inner deformation guiding portion 92 may be omitted. In the above embodiment, the deformation guiding portion 90 is provided on both sides (ventral side and back side) in the longitudinal direction X, but the deformation guiding portion 90 may be provided on only one side in the longitudinal direction X. In this case, by attaching the absorbent pad 10 to the diaper 1 so that the side on which the deformation guiding portion 90 is provided is the front side (ventral side) of the wearer, it is possible to obtain an improved effect of fit on the wearer's back side. Conversely, by attaching the absorbent pad 10 to the diaper 1 so that the side on which the deformation guiding portion 90 is provided is the rear side (back side) of the wearer, it is possible to obtain an improved effect of fit on the wearer's back side.

[0130] In the above embodiment, both the outer deformation inducing portion 91 and the inner deformation inducing portion 92 may be provided so as to extend in a slanted manner toward the inside of the width direction Y as they approach the center of the absorbent core 41 along the longitudinal direction X, similar to the outer deformation inducing portion 91B described above. Also, the variations of the deformation inducing portions 90 arranged on the ventral side (front side portion 10F) and the back side (rear side portion 10R) of the absorbent core 41 may be different. For example, the outer deformation inducing portion 91 and the inner deformation inducing portion 92 similar to the above embodiment (absorbent pad 10) may be provided on the front side portion 10F, while the outer deformation inducing portion 91 and the inner deformation inducing portion 92A similar to the first modified example (absorbent core 41A) may be provided on the rear side portion 10R. That is, the absorbent core 41 may be configured asymmetrically with respect to the center line CL2.

[0131] In the above embodiment, the pair of fixing portions 70 may be omitted. Also, only one fixing portion 70 (ventral or dorsal fixing portion 70) of the pair of fixing portions 70 may be provided, and the other fixing portion 70 may be omitted. In the above case, the outer deformation guiding portion 91 can be defined by the second definition. [Explanation of symbols]

[0132] 1...diaper (pants-type disposable diaper), 10...absorbent pad, 20...surface sheet, 30...back sheet, 41, 41A, 41B...absorbent core, 81...slit, 82...fold guide portion, 90...deformation guide portion, 90a...outer end portion, 90b...inner end portion, 91, 91B...outer deformation guide portion, 92, 92A...inner deformation guide portion, 100...compression portion, 102...rigid portion, 103...width rigid portion, 104...longitudinal rigid portion.

Claims

1. An absorbent pad that is attached to the inside of a pants-type disposable diaper and has a longitudinal direction, a width direction, and a thickness direction that intersect with each other, a liquid-permeable top sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the pants-type disposable diaper; a back sheet facing the pants-type disposable diaper in the worn state; an absorbent core disposed between the top sheet and the back sheet for absorbing exudates of the wearer; a pair of fixing parts arranged on both sides in the longitudinal direction on a back surface of the back sheet opposite to the absorbent core side, for fixing the absorbent pad to the pants-type disposable diaper; The absorbent core has at least one deformation guide portion extending obliquely toward the inside or outside of the absorbent core in the width direction as it approaches the center of the absorbent core along the longitudinal direction on both sides of a center line passing through the center of the absorbent core in the width direction and parallel to the longitudinal direction, the at least one deformation guiding portion includes an outer deformation guiding portion formed so as to at least partially overlap an outermost region in the longitudinal direction of the four regions when a portion of the absorbent pad between the pair of fixing portions is divided into four equal regions along the longitudinal direction, The absorbent core comprises: a pair of slits extending in the longitudinal direction on both sides in the width direction, the slits being provided so as to overlap with a central region when the absorbent pad is divided into three equal parts in the longitudinal direction; A pair of fold guide portions connecting the longitudinal ends of the pair of slits on both sides in the longitudinal direction, Each of the pair of fold guide portions extends inclinedly toward the inside in the longitudinal direction as it moves outward from the center line in the width direction, a compressed portion formed by compressing a part of the absorbent core in the thickness direction is provided at least in an outer region on the outer side of the pair of slits in the width direction, an area ratio of the compressed portions in the outer region is greater than an area ratio of the compressed portions in an inner region on the inner side of the pair of slits in the width direction; The compressed portion has a rigid portion including a width rigid portion in the outer region, the compressed portion extending in the width direction, The widthwise rigid portion is inclined at an angle of 45 degrees or more with respect to the longitudinal direction, The rigid portion is arranged so as not to overlap with the deformation guide portion and an extension line along a direction in which the deformation guide portion extends.

2. The at least one deformation guiding portion includes a plurality of the outer deformation guiding portions, 2. The absorbent pad of claim 1, wherein the plurality of outer deformation guiding portions include a deformation guiding portion formed so as to overlap at least partially with an outermost region among the four regions on one side of the longitudinal direction, and a deformation guiding portion formed so as to overlap at least partially with an outermost region among the four regions on the other side of the longitudinal direction.

3. The absorbent pad according to claim 1 , wherein the outer deformation guides extend at an incline toward the outside in the width direction as they approach the center of the absorbent core along the longitudinal direction.

4. The absorbent pad according to claim 1 , wherein the outer deformation guides extend at an incline toward the inside in the width direction as they approach the center of the absorbent core along the longitudinal direction.

5. The absorbent pad according to claim 1 , wherein the outer deformation guides are formed symmetrically with respect to the center line.

6. The absorbent pad according to claim 1 , wherein the outer deformation guide portion is continuously formed so as to straddle the center line.

7. The at least one deformation guiding portion includes an inner deformation guiding portion disposed at a predetermined interval from the outer deformation guiding portion on the inside in the longitudinal direction, The absorbent pad according to claim 1, wherein the inner deformation guide portion is formed so as to overlap at least partially with the outermost region in the longitudinal direction of the three regions when the absorbent pad is divided into three equal regions in the longitudinal direction.

8. The absorbent pad of claim 7, wherein when the portion between the pair of fixed portions in the absorbent core is divided into four equal regions along the longitudinal direction, the inner deformation guide portion is formed so as to at least partially overlap with the outermost region in the longitudinal direction of the four regions.

9. The absorbent pad according to claim 7 or 8, wherein each of the outer deformation guiding portions and the inner deformation guiding portions extends at an incline toward the outside in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

10. 10. The absorbent pad of claim 9, wherein a first angle formed between a portion of the outer deformation guiding portion arranged on one side of the width direction relative to the center line and a portion of the outer deformation guiding portion arranged on the other side of the width direction relative to the center line is greater than a second angle formed between a portion of the inner deformation guiding portion arranged on one side of the width direction relative to the center line and a portion of the inner deformation guiding portion arranged on the other side of the width direction relative to the center line.

11. The outer deformation guide portion extends in the longitudinal direction at an incline toward the outside in the width direction as it approaches the center of the absorbent core, The absorbent pad according to claim 7 or 8, wherein the inner deformation guide portion extends obliquely inward in the width direction toward the center of the absorbent core along the longitudinal direction.

12. The outer deformation guide portion extends in the longitudinal direction and inclined toward the inside in the width direction as it approaches the center of the absorbent core, The absorbent pad according to claim 7 or 8, wherein the inner deformation guides extend at an incline toward the outside in the width direction as they approach the center of the absorbent core along the longitudinal direction.

13. A pair of notches are provided on both side edges of the absorbent core in the width direction so as to be partially recessed inward in the width direction, The absorbent pad according to claim 1 , wherein outer ends of the deformation guides located outermost in the width direction are arranged so as not to overlap the pair of notches in the width direction.

14. The absorbent pad according to claim 13 , wherein the deformation guide portion is arranged so as not to overlap with the pair of notches in the width direction.

15. The absorbent pad according to claim 13 , wherein an inner end portion of the deformation guide portion that is located innermost in the width direction is arranged to overlap with the pair of notches in the width direction.

16. The absorbent pad according to claim 1 , wherein the range in the width direction in which the deformation guide is provided is included in a range between both ends of the pair of fixing parts in the width direction.

Images