Absorbent pad

Abstract

An absorbent pad 10 comprises: a top sheet 20; a back sheet 30; an absorbent core 41 which is disposed between the top sheet 20 and the back sheet 30 and which absorbs excrement of a wearer; and a pair of fixing parts 70, which are disposed at both sides in the longitudinal direction X on the back surface of the back sheet 30 and fix the absorbent pad 10 to a diaper 1. The absorbent core 41 has, on both sides of the center line CL1, deformation guide parts 90 which extend in a state of inclining toward the inner side or the outer side of the absorbent core 41 in the width direction Y as the distance to the center of the absorbent core 41 in the longitudinal direction X decreases. The deformation guide parts 90 each include an outer side deformation guide part 91 which is formed, when a portion between the pair of fixing parts 70 in the absorbent pad 10 is equally divided into four regions along the longitudinal direction X, in a manner at least partially overlapping with the corresponding outermost region of said regions in the longitudinal direction X.

Description

Absorbent pad

[0001] The present disclosure relates to an absorbent pad.

[0002] Patent Document 1 discloses a configuration in which, as an absorbent pad worn inside a pant-type diaper, a pair of slits facing each other in the width direction at the crotch portion and a pair of folding guide portions extending in the width direction so as to connect the longitudinal ends of each slit are provided.

[0003] Japanese Patent Application Laid-Open No. 2020-165810

[0004] According to the above absorbent pad, the fit of the absorbent core to the skin of the wearer at the crotch portion can be improved. On the other hand, there is room for improvement in enhancing the wearing feeling of the absorbent pad (absorbent core) in the area outside the crotch portion (that is, the ventral side portion or the dorsal side portion) of the absorbent pad. That is, there is room for improvement in the absorbent pad from the viewpoint of providing a more comfortable wearing feeling for a wearer wearing a pant-type diaper with the absorbent pad attached.

[0005] An object of the present disclosure is to provide an absorbent pad that can effectively improve the wearing feeling of a wearer.

[0006] One form of absorbent pad is used by being attached to the inside of a disposable diaper of the pull-up type, and is an absorbent pad having longitudinal, widthwise, and thicknesswise directions that intersect with each other, comprising: a liquid-permeable surface sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the disposable diaper of the pull-up type; a back sheet that faces the disposable diaper of the pull-up type when worn; an absorbent core disposed between the surface sheet and the back sheet for absorbing the wearer's excrement; and on the back surface of the back sheet opposite to the absorbent core side, arranged on both sides in the longitudinal direction, the absorbent pad is attached to the disposable diaper of the pull-up type. The absorbent core comprises a pair of fixing parts for fixing to one, and the absorbent core has at least one deformation-inducing part that extends inclined toward the inside or outside of the absorbent core in the width direction as it moves toward 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-inducing part includes an outer deformation-inducing part that overlaps at least a portion with the outermost longitudinal region of the four regions when the portion between the pair of fixing parts of the absorbent pad is divided into four equal regions along the longitudinal direction.

[0007] According to this disclosure, it is possible to provide an absorbent pad that can effectively improve the wearer's comfort.

[0008] This is a schematic perspective view showing an example of a diaper to which an absorbent pad according to the embodiment is attached. This is a plan view of the diaper with the absorbent pad attached, as seen from the skin side in an unfolded and stretched state. This is a plan view of the stretched absorbent pad as seen from the skin side. This is a schematic diagram of the cross-sectional structure of the absorbent pad along the line IV-IV in Figure 3. This is a plan view showing an example of a compression section provided in the absorbent core. This is a partially enlarged view of region A in Figure 5. This is a diagram for explaining an example of the range in which the deformation-inducing section and the rigid section are formed. This is a plan view showing an absorbent core according to a first modified example. This is a plan view showing an absorbent core according to a second modified example.

[0009] At least [1] to

[20] embodiments are disclosed in this specification and the accompanying drawings.

[0010] [1] An absorbent pad used to be attached to the inside of a disposable diaper of the pull-up type, having longitudinal, widthwise, and thicknesswise directions that intersect with each other, comprising: a liquid-permeable surface sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the disposable diaper of the pull-up type; a back sheet that faces the disposable diaper of the pull-up type when worn; an absorbent core disposed between the surface sheet and the back sheet for absorbing the wearer's excrement; and a pair of fixing parts disposed on both sides in the longitudinal direction on the back surface of the back sheet opposite to the absorbent core side for fixing the absorbent pad to the disposable diaper of the pull-up type, wherein the absorbent core has at least one deformation-inducing part that extends inclined toward the inside or outside of the absorbent core in the widthwise direction as it moves toward 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 widthwise direction and is parallel to the longitudinal direction, The absorbent pad includes an outer deformation-inducing portion which, when the portion of the absorbent pad between the pair of fixing portions is divided into four equal regions along the longitudinal direction, overlaps with at least a portion of the outermost region in the longitudinal direction among the four regions.

[0011] In the absorbent pad described in [1] above, an outer deformation-guiding portion is provided that extends longitudinally on both sides of the center line, sloping in the direction of the longitudinal direction, so as to overlap with the outermost region when the area between the pair of fixing portions is divided into four equal parts. As a result, when worn, the absorbent core folds along the outer deformation-guiding portion, thereby ensuring sufficient space between the wearer's body and the absorbent pad, and improving the fit between the wearer and the absorbent pad. For example, when worn, if the outer deformation-guiding portion is provided on the front (abdominal) side of the wearer, the feeling of wear on the wearer's abdominal side can be improved, and when worn, if the outer deformation-guiding portion is provided on the back (dorsal side) of the wearer, the feeling of wear on the wearer's back can be improved. Therefore, the above absorbent pad can effectively improve the wearer's comfort.

[0012] [2] The absorbent pad of [1], wherein the at least one deformation-guiding portion includes a plurality of the outer deformation-guiding portions, the plurality of the outer deformation-guiding portions includes a deformation-guiding portion formed such that at least a portion overlaps with the outermost region on one side of the four regions in the longitudinal direction, and a deformation-guiding portion formed such that at least a portion overlaps with the outermost region on the other side of the four regions in the longitudinal direction.

[0013] According to the configuration described in [2] above, 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 inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0015] According to the configuration in [3] above, when the absorbent pad deforms along the outer deformation guide portion, it is possible to ensure a sufficient width in the portion of the absorbent core located on the crotch side (longitudinally inward from the outer deformation guide portion) of the outer deformation guide portion. In other words, it is possible to suppress the bending and narrowing of this portion along the center line. This makes it possible to suitably secure space between the absorbent pad and the wearer's body longitudinally inward from the outer deformation guide portion, and to induce a smooth deformation of the absorbent pad that conforms to the shape of the wearer's body.

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

[0017] According to the configuration described in [4] above, when the absorbent pad deforms along the outer deformation guide portion, it is possible to ensure a sufficient width in the portion of the absorbent core located outside the outer deformation guide portion (longitudinally outside the outer deformation guide portion). In other words, it is possible to suppress the bending and narrowing of this portion along the center line. This makes it possible to appropriately secure space between the absorbent pad and the wearer's body longitudinally outside the outer deformation guide portion, and to achieve smooth deformation of the absorbent pad that conforms to the shape of the wearer's body.

[0018] [5] The outer deformation guide portion is an absorbent pad of any of [1] to [4], which is formed symmetrically with respect to the center line.

[0019] According to the configuration described in [5] above, when worn, the left and right sides of the center line of the outer deformation guide portion can evenly distribute the widthwise force applied to the absorbent core from both of the wearer's legs (both sides of the crotch). As a result, deformation of the absorbent core in the widthwise center caused by the movement of the wearer's legs can be stabilized. This reduces the occurrence of discomfort for the wearer.

[0020] [6] The outer deformation guide portion is formed continuously across the center line, and is one of the absorbent pads [1] to [5].

[0021] According to the configuration described in [6] above, the left and right sides of the center line of the outer deformation-guiding portion are connected, which allows for the formation of a stable folded portion along the outer deformation-guiding portion when worn. As a result, the effect of improving wearing comfort achieved by the deformation guidance of the absorbent core along the outer deformation-guiding portion as described above can be suitably obtained.

[0022] [7] The absorbent pad according to any of [1] to [6], wherein the at least one deformation-guiding portion includes an inner deformation-guiding portion disposed at a predetermined distance inward in the longitudinal direction from the outer deformation-guiding portion, the inner deformation-guiding portion is formed such that, when the absorbent pad is divided into three equal regions in the longitudinal direction, at least a portion of it overlaps with the outermost region in the longitudinal direction of the three regions.

[0023] According to the configuration described in [7] above, when worn, it is possible to create stepped folds in the absorbent core along the outer deformation-inducing portion and the inner deformation-inducing portion on the ventral or dorsal side of the wearer. As a result, the effects of securing sufficient space between the wearer's body and the absorbent pad, and improving the fit between the wearer and the absorbent pad, can be suitably enhanced.

[0024] [8] The absorbent pad of [7], wherein the inner deformation-inducing portion is formed such that, when the portion between the pair of fixing portions in the absorbent core is divided into four equal regions along the longitudinal direction, at least a portion of the four regions overlaps with the outermost region in the longitudinal direction.

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

[0026] [9] The absorbent pad of [7] or [8], wherein each of the outer deformation guide portion and the inner deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0027] According to the above configuration, both effects of [3] and [7] can be obtained.

[0028]

[10] The absorbent pad of [9] wherein the first angle formed by the portion of the outer deformation guide portion located on one side in the width direction with respect to the center line and the portion of the outer deformation guide portion located on the other side in the width direction with respect to the center line is greater than the second angle formed by the portion of the inner deformation guide portion located on one side in the width direction with respect to the center line and the portion of the inner deformation guide portion located on the other side in the width direction with respect to the center line.

[0029] In the configuration described in

[10] above, two deformation-inducing sections (an outer deformation-inducing section and an inner deformation-inducing section) are provided, which are formed so that the angle gradually widens outward in the longitudinal direction from the center of the absorbent core. This makes it possible to generate deformation of the absorbent core along the two deformation-inducing sections (i.e., bending deformation in which the angle gradually widens outward in the longitudinal direction) more stably. As a result, the effects achieved by the outer deformation-inducing section and the inner deformation-inducing section described above can be further enhanced.

[0030]

[11] The absorbent pad of [7] or [8], wherein the outer deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction, and the inner deformation guide portion extends inclined inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0031] According to the configuration described in

[11] above, the deformation induction of the absorbent core along the outer deformation induction portion and the inner deformation induction portion makes it possible to obtain the following effects. For example, when the absorbent core is folded along the outer deformation induction portion and the inner deformation induction portion so that the portion between the outer deformation induction portion and the inner deformation induction portion is convex toward the skin, that portion can be made to adhere well to the wearer's skin. This improves the fit. On the other hand, when the absorbent core is folded along the outer deformation induction portion and the inner deformation induction portion so that the portion between the outer deformation induction portion and the inner deformation induction portion is convex toward the non-skin side, a sufficient space can be suitably secured between the outer deformation induction portion and the inner deformation induction portion. This suppresses the occurrence of stuffiness and rash caused by excessive contact between the wearer's skin and excrement.

[0032]

[12] The absorbent pad of [7] or [8], wherein the outer deformation guide portion extends inclined inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction, and the inner deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

[0033] According to the configuration of

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

[0034]

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

[12] , wherein the absorbent core is provided with a pair of notches on both side edges in the width direction, which are formed to be partially recessed in the width direction, and the outermost end of the deformation guide portion located in the width direction is positioned so as not to overlap with the pair of notches in the width direction.

[0035] According to the configuration described in

[13] above, the force generated inward in the width direction starting from the notch due to the movement of the wearer's legs is less likely to be transmitted to the outer end, which is the starting position of the deformation of the absorbent core along the deformation-guiding section. This suppresses the instability of the bending motion of the absorbent core starting from the outer end of the deformation-guiding section, which can cause distortion in the absorbent core. As a result, the absorbent core can be stably bent and deformed along the deformation-guiding section. Consequently, the effects of the deformation-guiding section described above can be favorably obtained.

[0036]

[14] The entire deformation-guiding portion is arranged so as not to overlap with the pair of notches in the width direction, the absorbent pad of

[13] .

[0037] According to the configuration of

[14] above, the effect of

[13] above can be further enhanced.

[0038]

[15] The innermost end of the deformation guide portion, located in the width direction, is positioned to overlap with the pair of notches in the width direction, and is the absorbent pad of

[13] .

[0039] Near the inner end of the deformation-guiding section, it may be effective to transmit a force from the outside in the width direction (i.e., a force that triggers the bending motion) in order to appropriately induce the bending motion of the absorbent core along the deformation-guiding section. Therefore, according to the configuration of

[15] above, by appropriately transmitting the force generated in the width direction starting from the notch due to the movement of the wearer's legs to the vicinity of the inner end of the deformation-guiding section, the absorbent core can be stably bent and deformed along the deformation-guiding section.

[0040]

[16] The absorbent pad according to any of [1] to

[15] , wherein the absorbent core is provided so as to overlap with the central region when the absorbent pad is divided into three equal parts in the longitudinal direction, and has a pair of slits on both sides in the width direction that extend in the longitudinal direction, and a pair of folding guide portions on both sides in the longitudinal direction that connect the longitudinal ends of each of the pair of slits, and each of the pair of folding guide portions extends inclined toward the inside in the longitudinal direction as it moves outward from the center line in the width direction.

[0041] According to the configuration described in

[16] above, when worn, the area sandwiched between the pair of slits and the pair of folding guide sections can be deformed to become convex toward the skin. This makes it easier to bring the crotch portion of the absorbent core closer to the wearer's excretory opening, allowing for faster absorption of excrement and reducing discomfort caused by excrement. On the other hand, if the effect of this deformation of the absorbent core in the crotch area were to be directly transmitted to the longitudinal outer side (ventral or dorsal side), the absorbent core would not conform to the wearer's body on the ventral or dorsal side, potentially impairing the fit of the absorbent pad. In the absorbent pad described above, along with the pair of slits and the pair of folding guide sections, a deformation guide section is provided at a position further longitudinally outward from these. This makes it possible to obtain the effect of deformation of the absorbent core in the crotch area due to the pair of slits and the pair of folding guide sections, while the deformation guide section provides the wearer with a comfortable fit on the ventral or dorsal side.

[0042]

[17] The range in the width direction in which the deformation guide portion is provided is included in the range between the ends of the pair of fixed portions in the width direction, any of the absorbent pads from [1] to

[16] .

[0043] If the bending deformation of the absorbent pad along the deformation-inducing portion described above extends too far towards the end of the absorbent core in the width direction, the adhesion between the absorbent pad and the pant-type disposable diaper may be impaired at the end of the absorbent core in the width direction, or the fit of the absorbent pad to the wearer's body may be impaired. With the configuration of

[17] described above, the above-mentioned problems can be avoided by limiting the range in which bending deformation occurs along the deformation-inducing portion to a certain range of the absorbent core in the width direction (between the ends of the pair of fixing portions).

[0044]

[18] At least in the outer region outside the pair of slits in the width direction, there is provided a squeezing portion formed by squeezing a part of the absorbent core in the thickness direction, and the area ratio of the squeezing portion in the outer region is larger than the area ratio of the squeezing portion in the inner region inside the pair of slits in the width direction. The absorbent pad of

[16] or

[17] .

[0045] According to the configuration of

[18] above, the rigidity of the outer region outside the width direction of the pair of slits can be effectively increased by the squeezing portion. As a result, the force from the outer side to the inner side in the width direction generated on the absorbent pad due to the movement of the wearer's leg can be effectively transmitted 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. Thereby, the effect of

[16] above can be enhanced.

[0046]

[19] The squeezing portion has a rigid portion including a width-rigid portion in which the squeezed portion extends in the width direction in the outer region, the width-rigid portion is inclined at 45 degrees or more with respect to the longitudinal direction, and the rigid portion is provided so as not to overlap with an extension line along the deformation-inducing portion and the direction in which the deformation-inducing portion extends. The absorbent pad of

[18] .

[0047] According to the configuration of

[19] above, by not providing the rigid portion on the deformation-inducing portion and its extension line, it is possible to avoid the folding deformation of the absorbent core by the deformation-inducing portion being hindered by the rigid portion. As a result, the above-described effects by the deformation-inducing portion and the above-described effects by the rigid portion (squeezing portion) can be made compatible, and a more comfortable wearing feeling of the absorbent pad can be provided to the wearer.

[0048]

[20] An absorbent pad used to be attached to the inside of a disposable diaper of the pull-up type, having longitudinal, widthwise, and thicknesswise directions that intersect with each other, comprising: a liquid-permeable surface sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the disposable diaper of the pull-up type; a back sheet that faces the disposable diaper of the pull-up type when worn; and an absorbent core disposed between the surface sheet and the back sheet for absorbing the wearer's excrement, wherein the absorbent core has at least one deformation-inducing portion that extends inclined toward the inside or outside of the absorbent core in the widthwise direction as it moves toward 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 widthwise direction and is parallel to the longitudinal direction, and the at least one deformation-inducing portion includes an outer deformation-inducing portion that overlaps at least a part with the 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, the same effect as in [1] above can be obtained.

[0050] [Embodiments] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be denoted by the same reference numerals, and redundant descriptions will be omitted.

[0051] [Pants-type disposable diaper (diaper 1)] Figure 1 is a schematic perspective view of diaper 1 to which an absorbent pad 10 according to the embodiment is attached. Figure 2 is a plan view of diaper 1 with the absorbent pad 10 attached, when unfolded and extended, as seen from the skin side. Diaper 1 is a pants-type disposable diaper and has an abdominal waist section 1A located on the front (abdominal) side of the wearer, a dorsal waist section 1B located on the back (back) side of the wearer, and a crotch section 1C located in the crotch area of ​​the wearer. Diaper 1 has an outer body 2 that constitutes the abdominal waist section 1A and the dorsal waist section 1B, and an absorbent body 3 equipped with an absorbent core 4 that absorbs excrement such as urine. As shown in Figure 2, since diaper 1 is worn by the wearer with the absorbent pad 10 attached to the inside of diaper 1, diaper 1 can be used continuously by replacing only the absorbent pad 10 after the wearer has excreted, making it possible to use diaper 1 for a long time. Figure 2 shows the diaper 1 after it has been cut along the pair of side seal portions 2a located on both the left and right sides of the wearer when the diaper 1 is worn, and after the diaper 1 has been stretched to a state in which no wrinkles are formed.

[0052] In this embodiment, the "wearer" is the person wearing the diaper 1 to which the absorbent pad 10 is attached. The "skin side" is the side of the absorbent pad 10 that faces the wearer's skin when it is worn by the wearer together with the diaper 1 (hereinafter referred to as the "wearing state"). The "non-skin side" is the side that faces away from the wearer's skin when it is 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 component constituting the absorbent pad 10 are stretched until they approximately match the dimensions of the individual component. In the stretched state of the absorbent pad 10 (see Figure 2), the longitudinal direction is represented as the "longitudinal direction X", the short 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 the direction extending from the front (abdominal side) to the back (dorsal side) of the wearer's body. The width direction Y is the direction that coincides with the wearer's left-right direction. The thickness direction Z is the direction in which the materials constituting the absorbent pad 10 (surface sheet 20, back sheet 30, absorbent body 40, etc., described later) are layered. The thickness direction Z is also the 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] Figure 3 is a plan view of the absorbent pad 10 in its extended state, as seen from the skin side. Figure 4 is a schematic diagram of the cross-sectional structure of the absorbent pad 10 along the line IV-IV in Figure 3. As shown in Figures 3 and 4, the absorbent pad 10 has a shape that is approximately symmetric with respect to a center line CL1 parallel to the longitudinal direction X, which bisects the absorbent pad 10 in the width direction Y. The absorbent pad 10 also has a shape that is approximately symmetric with respect to a center line CL2 parallel to the width direction Y, which bisects the absorbent pad 10 in the longitudinal direction X. The portion of the absorbent pad 10 anterior to the center line CL2 (ventral side) is defined as the anterior portion 10F, and the portion posterior to the center line CL2 (dorsal side) is defined as the posterior portion 10R, and the following explanation will proceed accordingly. However, in this embodiment, as described above, the absorbent pad 10 has a shape that is symmetrical with respect to both centerlines CL1 and CL2, so the front portion 10F and the rear portion 10R are merely convenient divisions based on the state in which the absorbent pad 10 is attached to the diaper 1 and used. In other words, if the absorbent pad 10 is attached to the diaper 1 with its longitudinal direction X opposite to the direction shown in Figure 2, the front portion 10F and the rear portion 10R will be swapped.

[0054] The absorbent pad 10 includes a surface sheet 20, a back sheet 30, an absorbent body 40, a pair of side sheets 50, a leg extension member 60, and a pair of fixing parts 70.

[0055] The surface sheet 20 is a liquid-permeable sheet that faces the wearer's skin when worn. The surface sheet 20 can be formed from, for example, a nonwoven fabric or woven fabric, a synthetic resin film with liquid-permeable pores, or a composite sheet thereof. The surface sheet 20 covers the entire skin-facing side of the absorbent body 40.

[0056] The backing sheet 30 is the sheet that faces the diaper 1 when worn. The backing sheet 30 can be made of, for example, a liquid-impermeable nonwoven fabric, a synthetic resin film, or a composite sheet thereof.

[0057] The absorbent body 40 is positioned between the surface 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 component that absorbs the wearer's excrement and has liquid absorbency and liquid retention properties. The absorbent core 41 is, for example, a laminate of absorbent materials including crushed pulp or superabsorbent polymer (SAP), or a mixture thereof. The core wrap 42 is, for example, tissue or a nonwoven fabric sheet. In this embodiment, when viewed from the thickness direction Z, the outer shape of the absorbent core 41 is substantially the same as the outer shape of the absorbent body 40.

[0058] A pair of side sheets 50 are arranged on both sides of the absorbent pad 10 in the width direction Y, covering the entire length direction X so as to cover both side edges of the surface 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 beyond both ends of the absorbent body 40 in the width direction Y, and are folded back inward in the width direction Y and towards the skin side in the thickness direction Z, with both ends of the absorbent pad 10 in the width direction Y as the folding position, thereby forming a pair of leak-proof wall portions 51. Leak-proof wall expansion members 52 (in this embodiment, two leak-proof wall expansion members 52 for each leak-proof wall portion 51) such as elastic thread are fixed to the leak-proof wall portions 51 in an extended state along the length direction X. As the leak-proof expandable member 52 contracts in the longitudinal direction X, a pair of leak-proof wall portions 51 rise up towards the skin at both ends of the absorbent pad 10 in the width direction Y, functioning as a leak-proof wall (leg side gather) of the absorbent pad 10. Alternatively, the absorbent pad 10 may be configured such that the leak-proof 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. Furthermore, the absorbent pad 10 may be configured without forming the leak-proof wall portions 51.

[0059] The leg-area stretch members 60 are provided at both ends of the absorbent pad 10 in the width direction Y, between the non-skin side of the back sheet 30 and the skin side of the side sheet 50. The leg-area stretch members 60 are stretchable members such as elastic thread that can stretch in the longitudinal direction X. The leg-area stretch members 60 provide elasticity around the legs of the absorbent pad 10, forming leg gathers. In Figure 3, the stretchable area R3 (see Figure 7; the effective range in which leg gathers are formed) in which the leg-area stretch members 60 can stretch is shown as the leg-area stretch members 60.

[0060] The pair of fixing parts 70 are fixing parts for fixing the absorbent pad 10 to the diaper 1. For example, the fixing parts 70 are temporary fixing parts for detachably fixing the absorbent pad 10 to the skin side of the diaper 1. As shown in Figures 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 the vicinity of both ends of the absorbent body 40 (absorbent core 41) in the longitudinal direction X, at a position overlapping with the absorbent body 40. The fixing parts 70 are, for example, hook members (hook-and-loop fasteners) configured to engage with the surface 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, hot melt adhesive, double-sided tape, etc.

[0061] [Absorbent Core] As shown in Figure 3, the absorbent core 41 (absorbent body 40) has a roughly hourglass shape in plan view. The absorbent core 41 has a shape that is roughly symmetric with respect to the center line CL1 in the width direction Y, and also a shape that is roughly symmetric with respect to the center line CL2 in the longitudinal direction X. The absorbent core 41 has a narrow portion M, a front portion F located in front of (ventral side of) the narrow portion M, and a rear portion R located behind (dorsal side of) the narrow portion M. The narrow portion M is a constricted portion that is in the center of the longitudinal direction X and curves inward in the width direction Y. The narrow portion M is located in the crotch of the wearer when worn. On both sides of the front portion F in the width direction Y, notches Fa are provided that are partially recessed inward in the width direction Y at the portions that connect to the narrow portion M. Similarly, on both sides of the rear portion R in the width direction Y, the portions connected to the narrow portion M are provided with notches Ra that are partially recessed inward in the width direction Y.

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

[0063] As an example, each slit 81 is curved so that it is located furthest out in the width direction Y at a position that coincides with the center line CL2, and as it moves from the outside in the longitudinal direction X towards the inside, it moves outward in the width direction Y. Each slit 81 is, for example, a through-hole that penetrates the absorbent core 41 in the thickness direction Z. However, the slits 81 may be not only areas where liquid absorbent fibers such as pulp or liquid absorbent granular materials such as superabsorbent polymers (SAP) are completely absent, but also areas where some liquid absorbent fibers or liquid absorbent granular materials are present. In other words, the slits 81 should be areas where there are significantly fewer liquid absorbent fibers or liquid absorbent granular materials 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. Furthermore, the length of the slit 81 in the longitudinal direction X is preferably 80 mm or more. By configuring the slit 81 in this way, it is possible to easily deform the absorbent core 41 starting from the slit 81, while also facilitating the diffusion of the excrement absorbed by the absorbent core 41 in the longitudinal direction X.

[0065] The pair of folding guide sections 82 connect the ends of the pair of slits 81 in the longitudinal direction X on both sides in the longitudinal direction X. That is, the pair of folding guide sections 82 are composed of a folding guide section 82 that extends in the width direction Y to connect the ends of each slit 81 on one side in the longitudinal direction X, and a folding guide section 82 that extends in the width direction Y to connect the ends of each slit 81 on the other side in the longitudinal direction X.

[0066] As an example, each folding guide portion 82 is positioned furthest outward in the longitudinal direction X at a location that coincides with the center line CL1, and is inclined outward in the longitudinal direction X as it moves from the outside in the width direction Y towards the inside. Each folding guide portion 82 is formed, for example, by compression. By forming the folding guide portions 82 by compression in this way, the density of the liquid absorbent fibers is increased, resulting in higher rigidity than in areas where the folding guide portions 82 are not provided. Furthermore, it becomes possible to easily form the folding guide portions 82. As an example, each folding guide portion 82 is formed by compressing the absorbent core 41 in the thickness direction Z from the non-skin side towards the skin side. Alternatively, each folding guide portion 82 may be formed by compressing the absorbent core 41 in the thickness direction Z from the skin side towards the non-skin side. However, compressing the absorbent core 41 from the non-skin side towards the skin side makes it easier to bend the folding guide portion 82 so that it protrudes from the skin side towards the non-skin side.

[0067] The folding guide portion 82 may be any part of the absorbent core 41 that has a different rigidity from the surrounding area. The folding guide portion 82 may be configured in the same way as the slit 81 described above. For example, the folding guide portion 82 may be a part of the absorbent core 41 that has a different mass per unit area (g / m²) of liquid absorbent fibers. ２ ) may be a part that differs from the surrounding area, or the absorbent core 41 may be configured as a through-hole that penetrates in the thickness direction Z.

[0068] As shown in Figure 3, the absorbent core 41 has at least one deformation-inducing portion 90 that extends inclined along the longitudinal direction X toward the center of the absorbent core 41 (i.e., toward the center line CL2) toward the outside of the absorbent core 41 in the width direction Y on both sides of the center line CL1. In this embodiment, the absorbent core 41 has two deformation-inducing portions 90 on each of the ventral and dorsal sides. Each deformation-inducing portion 90 may be formed in the same way as the slit 81 described above, or in the same way as the folding-inducing portion 82 described above. That is, each deformation-inducing portion 90 may be a portion whose rigidity is lower than the surrounding area by reducing the amount of liquid-absorbing fibers or liquid-absorbing granular material constituting the absorbent core 41, or it may be a portion whose rigidity is higher than the surrounding area by being compressed.

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

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

[0071] (Second Definition) The outer deformation guide portion 91 is a deformation guide portion 90 formed such that, when the absorbent pad 10 is divided into four equal parts along the longitudinal direction X into four regions A41, A42, A43, and A44 (see Figure 3), at least a portion of it overlaps with the outermost regions A41 and A44 in the longitudinal direction X among the four regions A41 to A44.

[0072] As shown in Figure 5, in this embodiment, according to the first definition, all four deformation-inducing regions 90 included in the outermost region A1 on the ventral side or the outermost region A4 on the dorsal side correspond to the outer deformation-inducing region 91. In this example, the entirety of each deformation-inducing region 90 is included in the outermost region A1 or A4.

[0073] As shown in Figure 3, in this embodiment, according to the second definition, in the ventral and dorsal sides, the two deformation guide portions 90 located on the outermost edges in the longitudinal direction X correspond to the outer deformation guide portions 91, while the other two inner deformation guide portions 90 (i.e., deformation guide portions 90 whose entirety is included in region A42 or A43) do not correspond to the outer deformation guide portions 91.

[0074] In this embodiment, when the pair of fixing parts 70 are provided in a position that overlaps with the absorbent body 40, the requirements for the outer deformation guide part 91 are less stringent under the first definition than under the second definition. The pair of folding guide parts 82 that connect the ends of the pair of slits 81 provided to be positioned in 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 folding guide parts 82 do not overlap with any of the regions A1, A4, A41, and A44. That is, although the pair of folding guide parts 82 have the same configuration as the deformation guide part 90 described above, they do not qualify as the outer deformation guide part 91 when either the first definition or the second definition described above is used.

[0075] In this embodiment, as an example, the outer deformation guide portion 91 is defined by the second definition described above. In this case, as shown in Figures 3 and 5, the two outer deformation guide portions 90 that overlap at least a portion with region A41 or A44 among the four deformation guide portions 90 correspond to the outer deformation guide portion 91.

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

[0077] As shown in Figures 5 and 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 the outer region Route, which is at least outside the pair of slits 81 in the width direction Y. The outer region Route is the region enclosed 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. In other words, the outer region Route is the region formed outside each slit 81. In this embodiment, the compressed portion 100 is also provided in the inner region Rin, which is inside the pair of slits 81. The inner region Rin is the region enclosed by the line segment La, the line segment Lb, and each slit 81.

[0078] The compression section 100 includes a grid-like compression section 101 that is regularly arranged in a substantially grid pattern over the entire area of ​​the absorbent core 41, and a rigid section 102 that is a compression section provided separately from the grid-like compression section 101. The region of the absorbent core 41 where the compression section 100 is provided has higher rigidity than the region of the absorbent core 41 where the compression section 100 is not provided. In other words, a difference in rigidity exists between the region where the compression section 100 is provided and the adjacent region where the compression section 100 is not provided.

[0079] In this embodiment, the multiple rigid parts 102 are provided only in the outer region Rout. Due to the provision of multiple rigid parts 102, the area ratio of the compression part 100 in the outer region Rout is larger than the area ratio of the compression part 100 in the inner region Rin. The area ratio of the compression part 100 in the outer region Rout is "area of ​​the region in the outer region Rout where the compression part 100 is provided ÷ total area of ​​the outer region Rout". The area ratio of the compression part 100 in the inner region Rin is "area of ​​the region in the inner region Rin where the compression part 100 is provided ÷ total area of ​​the inner region Rin".

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

[0081] The width rigid portion 103 is the portion where the compressed part extends in the width direction Y. In this embodiment, the width rigid portion 103 extends substantially parallel to the width direction Y (substantially perpendicular to the longitudinal direction X), but it does not necessarily have to extend substantially parallel to the width direction Y. For example, the width rigid portion 103 only needs to be inclined at 45 degrees or more with respect to the longitudinal direction X. However, from the viewpoint of suitably obtaining the effects of the width rigid portion 103 described below, it is preferable that the width rigid 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 the portion that is connected to the width rigid portion 103 and is compressed, with the compressed portion extending 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 width direction Y), but it does not necessarily have to extend substantially parallel to the longitudinal direction X. For example, the longitudinal rigid portion 104 only needs to be inclined at 45 degrees or more with respect to the width direction Y. However, from the viewpoint of suitably obtaining the effects of the longitudinal rigid portion 104 described below, it is preferable that the longitudinal rigid portion 104 is inclined at 60 degrees or more with respect to the width direction Y, and more preferably at 80 degrees or more. As shown in Figure 5, the grid-like compression section 101 may have a portion that contacts the width-rigid portion 103 (a portion that appears to be connected to the width-rigid portion 103), but the longitudinal rigid portion 104 is intended to be a compression section provided in correspondence with the width-rigid portion 103, separate from the compression sections 100 (grid-like compression section 101) that are regularly arranged over the entire (or most) part of the absorbent core 41. In other words, the longitudinal rigid portion 104 is a compression section arranged based on a different arrangement rule than the regular arrangement followed by the grid-like compression section 101.

[0083] The longitudinal rigid portion 104 includes a longitudinal rigid portion 104a connected to the inner end (the end 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 of the width rigid portion 103 in the width direction Y.

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

[0085] [Effects of the absorbent pad] The absorbent pad 10 is provided with outer deformation guide portions 91 that extend in a V-shape or inverted V-shape (in this embodiment, a continuous V-shape spanning the center line CL1) on both sides of the center line CL1, inclined in the longitudinal direction X, so as to satisfy the first or second definition described above. As a result, when worn, the absorbent core 41 bends along the outer deformation guide portions 91, thereby ensuring 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, the absorbent pad 10 can effectively improve the wearer's comfort in areas relatively far from the wearer's crotch (at least one of the ventral and dorsal sides).

[0086] More specifically, when the absorbent core 41 folds outward (towards the non-skin side) along the outer deformation guide portion 91, a wide space is secured inside (towards the skin) of the absorbent pad 10 (absorbent core 41) at the position where the outer deformation guide portion 91 is provided. This avoids the problems caused by the absorbent pad 10 being too tightly attached to the wearer's skin (for example, deterioration of comfort and excrement absorption performance). On the other hand, when the absorbent core 41 folds inward (towards the skin side) along the outer deformation guide portion 91, the absorbent pad 10 (absorbent core 41) can be smoothly deformed to conform to the wearer's body shape at the position where the outer deformation guide portion 91 is provided. This improves the fit of the absorbent pad 10 to the wearer's body.

[0087] When the external deformation-guiding portion 91 is provided on the front (abdominal) side of the wearer, the wearing comfort on the wearer's abdominal side can be improved. For example, since the area around the wearer's urinary opening (the part that bulges outwards) is located on the front side, when the wearer puts on the diaper 1 with the absorbent pad 10 attached (i.e., when pulling up the diaper 1), the absorbent core 41 is easily deformed so that the portion along the external deformation-guiding portion 91 becomes convex outwards (towards the non-skin side). This deformation-guided absorption of the absorbent core 41 allows for a wider space to be secured between the absorbent pad 10 and the wearer's body (the area around the urinary opening) near the urinary opening. This suppresses the occurrence of stuffiness and rash caused by excessive contact between the wearer's skin and excrement, thereby improving the wearing comfort, and also allows for a favorable improvement in the absorption performance of excrement. Thus, the configuration in which the outer deformation guiding portion 91 is provided on the front (abdominal) side of the wearer is particularly effective when the pull-up motion of the pant-type disposable diaper (diaper 1) is involved (i.e., when the space in the front of the wearer's crotch area tends to narrow when the diaper is pulled up). In other words, the part of the outer deformation guiding portion 91 provided is more easily pushed outward (towards the non-skin side) by the area around the wearer's urinary opening, making it easier to secure sufficient space in the front of the wearer's crotch area after the pull-up motion is performed.

[0088] When the outer deformation guide portion 91 is located on the back side of the wearer, the fit on the back side of the wearer can be improved. For example, on the back side, when the wearer puts on the diaper 1 with the absorbent pad 10 attached (i.e., when pulling up the diaper 1), the absorbent core 41 is easily deformed so that the portion along the outer deformation guide portion 91 becomes convex inward (towards the skin) (i.e., so that the absorbent pad 10 fits snugly between the wearer's buttocks). By inducing deformation of the absorbent core 41 in this way, the absorbent pad 10 (absorbent core 41) can be smoothly deformed to conform to the shape of the wearer's body (shape around the buttocks), thereby improving the fit of the absorbent pad 10 to the wearer's body. Thus, a configuration in which the outer deformation guide portion 91 is located on the back side of the wearer is also effective, as it can induce appropriate deformation of the absorbent pad 10, especially when pulling up a pant-type disposable diaper (diaper 1).

[0089] Furthermore, the deformation-guiding portion 90 is formed such that the direction of inclination changes with respect to the center line CL1. As a result, the deformation-guiding portion 90 defines a fold in the center line CL1 (the central part in the width direction Y). More specifically, when the absorbent core 41 deforms along the deformation-guiding portion 90, the absorbent core 41 as a whole deforms along the center line CL1. By making it easier to deform the absorbent core 41 along the center line CL1 in this way, the deformation of the diaper 1 in the central part in the width direction Y and the deformation of the absorbent pad 10 (i.e., deformation along the center line CL1) can be matched. As a result, it is possible to make it difficult for the absorbent core 41 to become distorted and to suppress the occurrence of displacement of the absorbent pad 10 relative to the diaper 1.

[0090] As shown in Figure 3, in the absorbent pad 10, the plurality of deformation-guiding portions 90 include a plurality of outer deformation-guiding portions 91. That is, the plurality of outer deformation-guiding portions 91 include a deformation-guiding portion 90 formed so as to overlap at least a portion with the outermost region (region A1 in Figure 5 in the first definition, and region A41 in Figure 3 in the second definition) on the ventral side (one side) in the longitudinal direction X, and a deformation-guiding portion 90 formed so as to overlap at least a portion with the outermost region (region A4 in Figure 5 in the first definition, and region A44 in Figure 3 in the second definition) on the dorsal side (the other side) in the longitudinal direction X. In other words, the absorbent pad 10 is provided with outer deformation-guiding portions 91 on both the ventral and dorsal sides. With the above configuration, the wearing comfort on both the ventral and dorsal sides of the wearer can be effectively improved. That is, the effects of both cases can be obtained when the outer deformation-guiding portions 91 are provided on the ventral side and when they are provided on the dorsal side when worn.

[0091] As shown in Figure 3, in the absorbent pad 10, the outer deformation guiding portion 91 extends inclined outward in the width direction Y as it moves toward the center of the absorbent core 41 along the longitudinal direction X. In this embodiment, the outer deformation guiding portion 91 is formed in a V-shape that widens toward the center line CL2 along the longitudinal direction X. With the above configuration, when the absorbent pad 10 deforms along the outer deformation guiding portion 91, it is possible to secure a width in the width direction Y of the portion of the absorbent core 41 located on the crotch side (inward in the longitudinal direction X from the outer deformation guiding portion 91). In other words, it is possible to suppress the bending and narrowing of that portion along the center line CL1. This makes it possible to suitably secure a space between the absorbent pad 10 and the wearer's body inward in the longitudinal direction X from the outer deformation guiding portion 91, and to guide a smooth deformation of the absorbent pad 10 that conforms to the shape of the wearer's body.

[0092] As shown in Figure 3, in the absorbent pad 10, the outer deformation guidance portion 91 is formed symmetrically with respect to the center line CL1 as the axis of symmetry. With this configuration, when worn, the left and right portions of the outer deformation guidance portion 91, which straddle the center line CL1, can equally absorb the force in the width direction Y applied to the absorbent core 41 from both of the wearer's legs (both sides of the crotch). As a result, the deformation of the absorbent core 41 in the center of the width direction Y caused by the movement of the wearer's legs can be stabilized. This reduces the occurrence of discomfort for the wearer.

[0093] As shown in Figure 3, the outer deformation guide portion 91 is formed continuously so as to straddle the center line CL1. That is, one outer deformation guide portion 91 is provided to be continuously connected and is not separated into multiple independent parts. With the above configuration, since the left and right portions of the outer deformation guide portion 91 on both sides of the center line CL1 are connected, a stable fold can be formed along the outer deformation guide portion 91 when worn. In other words, in one outer deformation guide portion 91, the force for deformation can be distributed throughout the outer deformation guide portion 91 without interruption. As a result, the effect of improving wearing comfort achieved by the deformation guidance of the absorbent core 41 along the outer deformation guide portion 91 as described above can be suitably obtained.

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

[0095] As shown in Figure 3, in the absorbent pad 10, the multiple deformation guiding portions 90 include inner deformation guiding portions 92 arranged at a predetermined interval inward in the longitudinal direction X from the outer deformation guiding portion 91. The inner deformation guiding portion 92 is formed so as to overlap at least a portion with the outermost region (region A31 or A32) 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. In this embodiment, the inner deformation guiding portion 92 corresponding to the ventral outer deformation guiding portion 91 (deformation guiding portion 90 that overlaps at least a portion with region A41) is formed so as to overlap with region A31. Also, the inner deformation guiding portion 92 corresponding to the dorsal outer deformation guiding portion 91 (deformation guiding portion 90 that overlaps at least a portion with region A44) is formed so as to overlap with region A33. In other words, multiple deformation-guiding portions 90 (outer deformation-guiding portions 91 and inner deformation-guiding portions 92) are formed in multiple stages on the dorsal or ventral side (in this embodiment, both the dorsal and ventral sides). With this configuration, when worn, it is possible to create stepped folds in the absorbent core 41 along the outer deformation-guiding portions 91 and inner deformation-guiding portions 92 on the ventral or dorsal side of the wearer. As a result, the effects of securing sufficient space between the wearer's body and the absorbent pad 10, and improving the fit between the wearer and the absorbent pad 10, can be suitably enhanced.

[0096] As shown in Figure 5, in the absorbent pad 10, the inner deformation guiding portion 92 is formed such that, when the portion between the pair of fixing portions 70 in the absorbent core 41 is divided into four equal parts along the longitudinal direction X, it overlaps at least a portion with the outermost region A1 or A4 in the longitudinal direction X. In this embodiment, the inner deformation guiding portion 92 corresponding to the ventral outer deformation guiding portion 91 (deformation guiding portion 90 overlapping with region A1) is formed to overlap with region A1. Also, the inner deformation guiding portion 92 corresponding to the dorsal outer deformation guiding portion 91 (deformation guiding portion 90 overlapping with region A4) is formed to overlap with region A4. With the above configuration, by positioning the inner deformation guiding portion 92 relatively far outward in the longitudinal direction X so as to overlap with the outermost region (region A1 or A4) when the portion is divided into four equal parts in the same way as the outer deformation guiding portion 91, the effects achieved by the outer deformation guiding portion 91 and the inner deformation guiding portion 92 described above can be further enhanced.

[0097] As shown in Figure 3, each of the outer deformation guide portion 91 and the inner deformation guide portion 92 extends inclined outward in the width direction Y as it moves toward the center (center line CL2) of the absorbent core 41 along the longitudinal direction X. With the above configuration, it is possible to obtain the effects of both the effect achieved by forming the outer deformation guide portion 91 in a V-shape that widens toward the center line CL2 along the longitudinal direction X, and the effect achieved by forming the deformation guide portion 90 (outer deformation guide portion 91 and inner deformation guide portion 92) in multiple stages.

[0098] As shown in Figures 3 and 7, the first angle θ1 formed by the portion of the outer deformation guide portion 91 located on one side in the width direction Y with respect to the center line CL1 and the portion of the outer deformation guide portion 91 located on the other side in the width direction Y with respect to the center line CL1 is greater than the second angle θ2 formed by the portion of the inner deformation guide portion 92 located on one side in the width direction Y with respect to the center line CL1 and the portion of the inner deformation guide portion 92 located on the other side in the width direction Y with respect to the center line CL1. In other words, in the above configuration, two deformation guide portions 90 (outer deformation guide portion 91 and inner deformation guide portion 92) are provided, formed such that the angle widens in stages toward the outside in the longitudinal direction X from the center (center line CL2) of the absorbent core 41. This makes it possible to generate deformation of the absorbent core 41 along the two deformation guide portions 90 (i.e., bending deformation in which the angle widens in stages toward the outside in the longitudinal direction X) more stably. As a result, the effects achieved by the outer deformation guide portion 91 and inner deformation guide portion 92 described above can be further enhanced.

[0099] As shown in Figure 3, a pair of notches are provided on both side edges of the absorbent core 41 in the width direction Y, 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 Figure 7, the outermost end 90a of each deformation guidance portion 90, located in the width direction Y, is positioned so as not to overlap with the pair of notches Fa and Ra in the width direction Y (i.e., the range R1 in the longitudinal direction X where the notches Fa and Ra are formed). With the above configuration, the force generated inward in the width direction Y, starting from the notches Fa and Ra due to the movement of the wearer's legs, is less likely to be transmitted to the outer end 90a, which is the starting position of the deformation of the absorbent core 41 along the deformation guidance portion 90. This makes it possible to suppress the instability of the bending motion of the absorbent core 41 starting from the outer end 90a of the deformation guidance portion 90, thereby preventing distortion of the absorbent core 41. This allows the absorbent core 41 to be stably bent and deform along the deformation-guiding portion 90. As a result, the effects of the deformation-guiding portion 90 described above can be suitably obtained.

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

[0101] As shown in Figure 7, the entire outer deformation guide portion 91 (deformation guide portion 90) is arranged so as not to overlap with the pair of notches Fa and Ra in the width direction Y. That is, in this embodiment, the outermost outer deformation guide portion 91, which is provided among the plurality of deformation guide portions 90, does not overlap at all with the area in which the notches Fa and Ra are formed in the longitudinal direction X. With the above configuration, the above-mentioned effects can be obtained even more favorably. That is, the transmission of forces generated on the inside in the width direction Y, starting from the notches Fa and Ra, to the outer deformation guide portion 91 can be suppressed more favorably.

[0102] As shown in Figure 7, the inner end 90b of the inner deformation guide portion 92 (deformation guide portion 90), which is located furthest inward in the width direction Y, is positioned to overlap with a pair of notches Fa and Ra in the width direction Y. That is, in this embodiment, the portion of the inner deformation guide portion 92 that includes the inner end 90b but does not include the outer end 90a overlaps with the area in the longitudinal direction X where the notches Fa and Ra are formed. Near the inner end 90b of the deformation guide 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 bending motion) in order to appropriately induce the bending motion of the absorbent core 41 along the deformation guide portion 90. Therefore, with the above configuration, by appropriately transmitting the force generated inward in the width direction Y, starting from the notches Fa and Ra due to the movement of the wearer's legs, to the vicinity of the inner end 90b of the deformation guide portion 90 (in this embodiment, the inner deformation guide portion 92), the absorbent core 41 can be stably bent and deformed along the deformation guide portion 90.

[0103] The positional relationship between the notches Fa and Ra and the deformation guide portion 90 described above may be configured to be valid for all deformation guide portions 90, or it may be configured to be valid for only one of the outer deformation guide portion 91 and the inner deformation guide portion 92. For example, in this embodiment, the outer deformation guide portion 91 is positioned so as not to completely overlap the notch, but the inner end portion 90b of the outer deformation guide portion 91 may be positioned so as to overlap the notch. Also, the inner deformation guide portion 92 may be positioned so as not to completely overlap the notch.

[0104] As shown in Figure 3, in the absorbent pad 10, the absorbent core 41 has a pair of slits 81 and a pair of folding guide portions 82. With this configuration, when worn, the area sandwiched between the pair of slits 81 and the pair of folding guide portions 82 can be deformed to become convex toward the skin. This makes it easier to bring the crotch portion of the absorbent core 41 closer to the wearer's excretory opening, allowing for faster absorption of excrement and reducing discomfort caused by excrement. On the other hand, if the effect of such deformation of the absorbent core 41 in the crotch area were to be directly transmitted to the outside (ventral or dorsal side) in the longitudinal direction X, the absorbent core 41 would not conform to the wearer's body on the ventral or dorsal side, potentially impairing the fit of the absorbent pad. In the absorbent pad 10, along with the pair of slits 81 and the pair of folding guide portions 82, the above-mentioned deformation guide portion 90 is provided at a position further outward in the longitudinal direction X than these. This makes it possible to obtain the effect of deformation of the absorbent core 41 in the crotch area by the pair of slits 81 and the pair of folding guide portions 82, while the deformation guide portion 90 provides the wearer with a comfortable fit on the ventral or dorsal side.

[0105] As shown in Figure 7, in the absorbent pad 10, the area in the width direction Y where the deformation guide portion 90 is provided is included in the area between the ends of the pair of fixing portions 70 in the width direction Y (i.e., the area R2 in the width direction Y where the pair of fixing portions 70 are provided). If the bending deformation of the absorbent pad 10 along the aforementioned deformation guide portion 90 extends too far towards 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. With the above configuration, by limiting the area in which bending deformation along the deformation guide portion 90 occurs to a certain area of ​​the absorbent core 41 in the width direction Y (the area R2 between the ends of the pair of fixing portions 70), the above-mentioned problems can be avoided.

[0106] As shown in Figure 5, the absorbent pad 10 is provided with a compressed portion 100 formed by compressing a part of the absorbent core 41 in the thickness direction Z in the outer region Rout, which is outside the pair of slits 81 in the width direction Y. 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. With this configuration, the rigidity of the outer region Rout, which is outside the pair of slits 81 in the width direction Y, can be effectively increased by the compressed portion 100. This allows the force from the outside to the inside in the width direction Y that is generated on the absorbent core 41 due to the wearer's leg movements to be effectively transmitted to the outer region Rout of the absorbent core 41. Furthermore, even when worn for a long time or when 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 distortion of the outer region Rout can be suppressed. As a result, the absorbent core 41 can be stably deformed along the pair of slits 81 such 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 Figure 7, the rigid portion 102 provided in the outer region (Rout) is positioned so as not to overlap with the deformation-guiding portion 90 and the extension line along the direction in which the deformation-guiding portion 90 extends. In this embodiment, the above configuration is realized by positioning all the rigid portions 102 inward in the longitudinal direction X from the extension line Le along the direction in which the inner deformation-guiding portion 92 extends. With this configuration, by not providing the rigid portion 102 on the deformation-guiding portion 90 and its extension line, it is possible to avoid the rigid portion 102 hindering the bending deformation of the absorbent core 41 by the deformation-guiding portion 90. As a result, it is possible to achieve both the above-mentioned effects of the deformation-guiding portion 90 and the above-mentioned effects of the rigid portion 102 (compression portion 100), and provide the wearer with a more comfortable fit of the absorbent pad 10.

[0108] As shown in Figure 6, in the absorbent pad 10, the compression portion 100 includes a width-rigid portion 103 in the outer region (Rout) where the compressed portion extends in the width direction Y. With this configuration, the force from the outside to the inside in the width direction Y of the absorbent pad 10 due to the wearer's leg movement can be easily transmitted to the pair of slits 81 via the width-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 between the pair of slits 81 becomes convex toward the skin side.

[0109] As shown in Figure 6, in the absorbent pad 10, the length L of the rigid part 102 in the width direction Y is 1 / 3 or more of the minimum width w of the outer region Route. In this embodiment, the length of the outer region Route in the width direction Y (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 minimized on the center line CL2. If the length L of the rigid part 102 is insufficient, the component of the force transmitted to the outer region Route due to the wearer's leg movement (force directed inward in the width direction Y) that is dispersed in the longitudinal direction X becomes large, making it difficult to stably generate bending deformation along the pair of slits 81. In contrast, with the above configuration, by setting the length L of the rigid part 102 to a sufficient length relative to the width of the outer region Route (minimum width w), the dispersion of force in the longitudinal direction X is suppressed, and bending deformation along the pair of slits 81 can be stably generated. Furthermore, from the viewpoint of enhancing the above effect, the length L of the rigid portion 102 is preferably 1 / 2 or more of the minimum width w of the outer region Rout, and more preferably 3 / 4 or more.

[0110] As shown in Figure 6, in the absorbent pad 10, at least one rigid part 102 is provided at a position opposite to the outermost end of the pair of slits 81 in the width direction Y of the outer region Route (the part that bulges outward the most in the width direction Y) and in the width direction Y (in this embodiment, on the center line CL2). In this embodiment, one rigid part 102 is provided on the center line CL2. With the above configuration, by providing a rigid part 102 to facilitate the transmission of such force to the pair of slits 81 at the position where the length in the width direction Y from the outer end of the width direction Y of the outer region Route to the pair of slits 81 is shortest, that is, at the position where the inward force in the width direction Y caused by the wearer's leg movement is most easily transmitted, the effect of the rigid part 102 can be more effectively demonstrated.

[0111] As shown in Figure 6, in the absorbent pad 10, the rigid portion 102 includes a longitudinal rigid portion 104. With this configuration, by providing a rigid portion 102 in which a longitudinal rigid portion 104 and a width rigid portion 103 extending in directions intersecting each other are integrally formed, the shape stability of the rigid portion 102 can be enhanced. As a result, the effects of the rigid portion 102 described above can be more effectively exhibited.

[0112] As shown in Figure 6, the rigid portion 102 has a longitudinal rigid portion 104a connected to the inner end of the width rigid portion 103 in the width direction Y. With this configuration, the longitudinal rigid portion 104a can increase the area (width in the longitudinal direction X) over which force is transmitted from the rigid portion 102 to the pair of slits 81, compared to the case where only the width rigid portion 103 is provided. This makes the transmission of force through the rigid portion 102 more efficient, and allows for more stable bending deformation of the absorbent core 41 along the pair of slits 81.

[0113] As shown in Figure 6, the rigid portion 102 has a longitudinal rigid portion 104b connected to the outer end of the width rigid portion 103 in the width direction Y. With this configuration, the longitudinal rigid portion 104b increases the area (width in the longitudinal direction X) of the rigid portion 102 to which forces caused by the wearer's leg movements are transmitted, compared to the case where only the width rigid portion 103 is provided. This makes the transmission of forces through the rigid portion 102 more efficient, and allows for more stable bending deformation of the absorbent core 41 along the pair of slits 81.

[0114] As shown in Figure 6, in the outer region (Rout), the compression section 100 is provided with a plurality (five in this embodiment) of rigid sections 102 that are spaced apart from each other in the longitudinal direction X. With this configuration, the area (width in the longitudinal direction X) of the rigid section 102 for transmitting the force caused by the wearer's leg movement to the inner portion of the absorbent core 41 (the side with the pair of slits 81) can be increased compared to the case where a single rigid section 102 is provided. This makes the transmission of force through the rigid section 102 more efficient, and allows for more stable bending deformation of the absorbent core 41 along the pair of slits 81.

[0115] Furthermore, the multiple rigid parts 102 include a plurality of rigid parts 102 (three in this embodiment) arranged on the inside (first position) in the width direction Y, spaced apart from each other in the longitudinal direction X, and a plurality of rigid parts 102 (two in this embodiment) arranged on the outside (second position) in the width direction Y, spaced apart from each other in the longitudinal direction X. The plurality of rigid parts 102 (three) arranged on the inside and the plurality of rigid parts 102 (two) arranged on the outside are arranged alternately along the longitudinal direction X. With the above configuration, the combination of the plurality of rigid parts 102 arranged on the inside and the plurality of rigid parts 102 arranged on the outside effectively increases the area of ​​the rigid parts 102 (width in the longitudinal direction X) for transmitting forces caused by the movement of the wearer's legs to the inner portion of the absorbent core 41 (the pair of slits 81 side), compared to the case where a single rigid part 102 is provided. As a result, force transmission via the rigid parts 102 can be made more efficient, and the bending deformation of the absorbent core 41 along the pair of slits 81 can be made more stable.

[0116] As shown in Figure 7, at least a portion of the multiple rigid parts 102 (in this embodiment, the portion including the longitudinal rigid part 104a of each of the three rigid parts 102 arranged on the inside) is provided within the region where a pair of fixing parts 70 exist in the width direction Y (i.e., the range R2 in the width direction Y where a pair of fixing parts 70 are provided). With the above configuration, the absorbent pad 10 is fixed to the diaper 1 by the pair of fixing parts 70, thereby suppressing deformation in the longitudinal direction X and width direction Y of the portion of the rigid part 102 located between the pair of fixing parts 70. This makes the transmission of force through the rigid parts 102 more efficient, and allows for more stable bending deformation of the absorbent core 41 along the pair of slits 81.

[0117] As shown in Figure 7, at least a portion of the multiple rigid parts 102 (in this embodiment, all 10 rigid parts 102) are provided within the expansion / contraction region R3 in which the leg-around telescopic member 60 can expand and contract in the longitudinal direction X. With the above configuration, by including at least a portion of the rigid parts 102 in the range in which the contraction force in the longitudinal direction X by the leg-around telescopic member 60 acts (i.e., the range in which the leg gathers are formed), the portion of the absorbent core 41 including at least a portion of the rigid parts 102 contracts and gathers in the longitudinal direction X, thereby forming a highly rigid uneven structure. Through this highly rigid uneven structure, the force transmitted in the width direction Y to the inside of the absorbent core 41 can be suitably transmitted to the pair of slits 81. As a result, the bending deformation of the absorbent core 41 along the pair of slits 81 can be generated more stably.

[0118] [Variations] This disclosure is not limited to the embodiments described above. The materials and shapes of each component are not limited to those described above, but can be made from a variety of materials and shapes.

[0119] (First Modified Example) Figure 8 shows an absorbent core 41A according to the first modified example. The absorbent core 41A differs from the absorbent core 41 according to the embodiment in that it has an internal deformation guide portion 92A instead of an internal deformation guide portion 92, but the other configurations are the same as those of the absorbent core 41.

[0120] In the absorbent core 41A, the outer deformation guide portion 91 extends inclined outward in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X, while the inner deformation guide portion 92A extends inclined inward 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 deformation guidance of the absorbent core 41 along the outer deformation guidance portion 91 and the inner deformation guidance portion 92A makes it possible to obtain the following effects. For example, when the absorbent core 41 is folded along the outer deformation guidance portion 91 and the inner deformation guidance portion 92A such that the portion of the absorbent core 41 between the outer deformation guidance portion 91 and the inner deformation guidance portion 92A becomes convex toward the skin side (inward), that portion can be made to adhere well to the wearer's skin. This improves the fit. On the other hand, when the absorbent core 41 is folded along the outer deformation guidance portion 91 and the inner deformation guidance portion 92A such that the portion of the absorbent core 41 between the outer deformation guidance portion 91 and the inner deformation guidance portion 92A becomes convex toward the non-skin side (outward), a sufficient space can be suitably secured between the outer deformation guidance portion 91 and the inner deformation guidance portion 92A. This suppresses the occurrence of stuffiness and rash caused by excessive contact between the wearer's skin and excrement.

[0122] (Second Modification) Figure 9 shows an absorbent core 41B according to the second modification. 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 an outer deformation guide portion 91, but the other configurations are the same as those of the absorbent core 41.

[0123] In the absorbent core 41 described above, the outer deformation guide portion 91 was inclined to move outward in the width direction Y as it moved toward 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 guide portion 91B is provided to extend inclined toward the inward in the width direction Y as it moves toward the center (center line CL2) of the absorbent core 41 along the longitudinal direction X. With the above configuration, when the absorbent core 41 deforms along the outer deformation guide portion 91B, it is possible to secure a width in the width direction Y of the portion of the absorbent core 41 located outside the outer deformation guide portion 91B (outside the longitudinal direction X beyond the outer deformation guide portion 91B). That is, it is possible to suppress the bending and narrowing of that portion along the center line CL1. As a result, it is possible to suitably secure a space between the absorbent core 41 and the wearer's body outside the longitudinal direction X beyond the outer deformation guide portion 91B, and to realize a smooth deformation of the absorbent core 41 that conforms to the shape of the wearer's body.

[0124] Furthermore, in the absorbent core 41B, the outer deformation guide portion 91B extends inclined inward in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X, while the inner deformation guide portion 92 extends inclined outward in the width direction Y as it approaches the center of the absorbent core 41 along the longitudinal direction X.

[0125] With the above configuration, the inner deformation guiding portion 92 can provide the same effects as those achieved by the outer deformation guiding portion 91 of the above embodiment (absorbent pad 10), and the outer deformation guiding portion 91B can provide the effects described above.

[0126] Some of the components in the above embodiment may be changed or deleted, and other components may be added to the above embodiment as appropriate. For example, the notches Fa and Ra of the absorbent core 41 may be located in different places than in the above embodiment, or may have different shapes than in the above embodiment. Also, in the above embodiment, one notch Fa and Ra is provided on one side in the width direction Y, but multiple notches Fa and Ra may be provided on one side in the width direction Y.

[0127] In the above embodiment, the pair of folding guide portions 82 may be omitted and only the pair of slits 81 may be provided. Even in this case, the folding deformation of the absorbent core 41 along the pair of slits 81 can be guided. Furthermore, the pair of slits 81 and the pair of folding guide portions 82 may not be provided.

[0128] In the above embodiment, the compression section 100 may be omitted. Also, in the above embodiment, the grid-shaped compression section 101 is provided over the entire absorbent core 41, but there may be regions where the grid-shaped compression section 101 is not provided (for example, the inner region Rin between the pair of slits 81). Also, in the above embodiment, the rigid section 102 is provided only in the outer region Rout, but the rigid section 102 may also be provided in regions other than the outer region Rout (for example, the inner region Rin). Even if a part of the rigid section 102 is provided in the inner region Rin, by making the area ratio of the compression section 100 in the outer region Rout larger than the area ratio of the compression section 100 in the inner region Rin, the rigidity of the outer region Rout can be increased relative to the inner region Rin, and the effects of the compression section 100 (especially the rigid section 102) described above 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. Furthermore, in the above embodiment, the deformation guiding portion 90 is provided on both sides (ventral and dorsal sides) 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 with the deformation guiding portion 90 is on the front (ventral side) of the wearer, an improvement in the fit on the wearer's ventral side can be obtained. Conversely, by attaching the absorbent pad 10 to the diaper 1 so that the side with the deformation guiding portion 90 is on the back (dorsal side) of the wearer, an improvement in the fit on the wearer's dorsal side can be obtained.

[0130] In the above embodiment, both the outer deformation guide portion 91 and the inner deformation guide portion 92 may be provided so as to be inclined and extending inward in the width direction Y as they move toward the center of the absorbent core 41 along the longitudinal direction X, similar to the outer deformation guide portion 91B described above. Furthermore, the variations of the deformation guide portions 90 arranged on the ventral side (front side portion 10F) and the dorsal side (rear side portion 10R) of the absorbent core 41 may differ. For example, the front side portion 10F may be provided with the same outer deformation guide portion 91 and inner deformation guide portion 92 as in the above embodiment (absorbent pad 10), while the rear side portion 10R may be provided with the same outer deformation guide portion 91 and inner deformation guide portion 92A as in the first modified example (absorbent core 41A). In other words, the absorbent core 41 may be configured asymmetrically with respect to the center line CL2.

[0131] In the above embodiment, the pair of fixing parts 70 may be omitted. Alternatively, only one of the pair of fixing parts 70 (the ventral or dorsal fixing part 70) may be provided, and the other fixing part 70 may be omitted. In the above case, the outer deformation guide part 91 can be defined by the second definition.

[0132] 1... Diaper (pants-type disposable diaper), 10... Absorbent pad, 20... Surface sheet, 30... Back sheet, 41, 41A, 41B... Absorbent core, 81... Slit, 82... Folding guide section, 90... Deformation guide section, 90a... Outer end, 90b... Inner end, 91, 91B... Outer deformation guide section, 92, 92A... Inner deformation guide section, 100... Compression section, 102... Rigid section, 103... Width rigid section, 104... Longitudinal rigid section.

Claims

1. An absorbent pad used to be attached to the inside of a disposable diaper of the pull-up type, having longitudinal, widthwise, and thicknesswise directions that intersect with each other, comprising: a liquid-permeable surface sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the disposable diaper of the pull-up type; a back sheet that faces the disposable diaper of the pull-up type when worn; an absorbent core disposed between the surface sheet and the back sheet for absorbing the wearer's excrement; and a pair of fixing parts disposed on both sides in the longitudinal direction on the back surface of the back sheet opposite to the absorbent core side for fixing the absorbent pad to the disposable diaper of the pull-up type, wherein the absorbent core has at least one deformation-inducing part that extends inclined toward the inside or outside of the absorbent core in the widthwise direction as it moves toward 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 widthwise direction and is parallel to the longitudinal direction, The absorbent pad includes an outer deformation-inducing portion which, when the portion of the absorbent pad between the pair of fixing portions is divided into four equal regions along the longitudinal direction, overlaps with at least a portion of the outermost region in the longitudinal direction among the four regions.

2. The absorbent pad according to claim 1, wherein the at least one deformation-guiding portion includes a plurality of the outer deformation-guiding portions, and the plurality of the outer deformation-guiding portions includes a deformation-guiding portion formed such that at least a portion overlaps with the outermost region on one side of the four regions in the longitudinal direction, and a deformation-guiding portion formed such that at least a portion overlaps with the outermost region on the other side of the four regions in the longitudinal direction.

3. The absorbent pad according to claim 1, wherein the outer deformation guiding portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

4. The absorbent pad according to claim 1, wherein the outer deformation guide portion extends inclined inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

5. The absorbent pad according to claim 1, wherein the outer deformation guiding portion is formed symmetrically with respect to the center line as the axis of symmetry.

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

7. The absorbent pad according to claim 1, wherein the at least one deformation-guiding portion includes an inner deformation-guiding portion disposed at a predetermined distance inward in the longitudinal direction from the outer deformation-guiding portion, and the inner deformation-guiding portion is formed such that, when the absorbent pad is divided into three equal regions in the longitudinal direction, at least a portion of the inner deformation-guiding portion overlaps with the outermost region in the longitudinal direction of the three regions.

8. The absorbent pad according to claim 7, wherein the inner deformation-inducing portion is formed such that, when the portion between the pair of fixing portions in the absorbent core is divided into four equal regions along the longitudinal direction, at least a portion of the four regions overlaps with the outermost region in the longitudinal direction.

9. The absorbent pad according to claim 7 or 8, wherein each of the outer deformation guide portion and the inner deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

10. The absorbent pad according to claim 9, wherein the first angle formed by the portion of the outer deformation guide portion located on one side in the width direction with respect to the center line and the portion of the outer deformation guide portion located on the other side in the width direction with respect to the center line is greater than the second angle formed by the portion of the inner deformation guide portion located on one side in the width direction with respect to the center line and the portion of the inner deformation guide portion located on the other side in the width direction with respect to the center line.

11. The absorbent pad according to claim 7 or 8, wherein the outer deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction, and the inner deformation guide portion extends inclined inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

12. The absorbent pad according to claim 7 or 8, wherein the outer deformation guide portion extends inclined inward in the width direction as it approaches the center of the absorbent core along the longitudinal direction, and the inner deformation guide portion extends inclined outward in the width direction as it approaches the center of the absorbent core along the longitudinal direction.

13. The absorbent pad according to claim 1, wherein the absorbent core is provided with a pair of notches formed to be partially recessed inward in the width direction on both side edges in the width direction, and the outermost end of the deformation guiding portion, which is located furthest outward in the width direction, is positioned so as not to overlap with the pair of notches in the width direction.

14. The absorbent pad according to claim 13, wherein the entire deformation-guiding 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 the innermost end of the deformation-guiding portion, located 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 absorbent core is provided so as to overlap with the central region when the absorbent pad is divided into three equal parts in the longitudinal direction, and has a pair of slits on both sides in the width direction that extend in the longitudinal direction, and a pair of folding guide portions on both sides in the longitudinal direction that connect the longitudinal ends of each of the pair of slits, and each of the pair of folding guide portions extends inclined toward the inside in the longitudinal direction as it moves outward from the center line in the width direction.

17. The absorbent pad according to claim 1, wherein the range in the width direction in which the deformation guide portion is provided is included in the range between the ends of the pair of fixing portions in the width direction.

18. The absorbent pad according to claim 16, wherein at least in the outer region outside the pair of slits in the width direction, a compressed portion is provided, formed by compressing a part of the absorbent core in the thickness direction, and the area ratio of the compressed portion in the outer region is greater than the area ratio of the compressed portion in the inner region inside the pair of slits in the width direction.

19. The absorbent pad according to claim 18, wherein the compressed portion has a rigid portion in the outer region that includes a width rigid portion in which the compressed portion extends in the width direction, the width rigid portion is inclined at an angle of 45 degrees or more with respect to the longitudinal direction, and the rigid portion is provided so as not to overlap with the deformation guiding portion and the extension line along the direction in which the deformation guiding portion extends.

20. An absorbent pad used by being attached to the inside of a disposable diaper of the pull-up type, having longitudinal, widthwise, and thicknesswise directions that intersect with each other, comprising: a liquid-permeable surface sheet that faces the wearer's skin when the absorbent pad is worn by the wearer together with the disposable diaper of the pull-up type; a back sheet that faces the disposable diaper of the pull-up type when worn; and an absorbent core disposed between the surface sheet and the back sheet for absorbing the wearer's excrement, wherein the absorbent core has at least one deformation-inducing portion that extends inclined toward the inside or outside of the absorbent core in the widthwise direction as it moves toward 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 widthwise direction and is parallel to the longitudinal direction, and the at least one deformation-inducing portion includes an outer deformation-inducing portion that overlaps at least a part with the outermost region in the longitudinal direction of the four regions when the absorbent pad is divided into four equal regions along the longitudinal direction.

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