Absorbent article

Abstract

An absorbent article (1) is provided with an absorbent body (10). The absorbent body (10) has a central deformation guide section (21S). The absorbent body (10) has a pair of deformation guide regions (60). In each deformation guide region (60), an end region (60et) on the end side in the width direction of the absorbent body (10) within the deformation guide region (60) is positioned on the inside in the longitudinal direction of a center region (60ct) disposed on the center side in the width direction. The deformation guide region (60) has elastic members (55, 57) that do not overlap a center line in the longitudinal direction of the absorbent article (1), are provided at both end portions in the width direction and the center portion in the longitudinal direction of the absorbent article (1), and expand and contract in the longitudinal direction.

Description

Technical Field

[0001] The present invention relates to absorbent articles. Background Art

[0002] Conventionally, in the case of an absorbent article having an absorbent body that absorbs excretion fluids such as urine and menstrual blood, the following technology is known: wherein the absorbent body is deformed into a specific shape by folding or the like when worn, thereby improving leakage prevention and improving fit. For example, Patent Document 1 discloses an absorbent article having a concave portion on the surface of the back sheet side of the absorbent body and a pair of grooves on the surface of the front sheet side of the absorbent body; and when worn, the lower absorbent layer of the absorbent body is folded in a substantially V-shape with the groove as an axis, and the upper absorbent layer is deformed into a curved protruding shape toward the skin of the wearer. In addition, for example, Patent Document 2 discloses an absorbent article including an elastic member extending in the length direction, the elastic member being located in the transverse central portion in the absorbent body placement area and being placed between the absorbent body and the outermost sheet, and due to the contraction of the elastic member, the portion of the absorbent body overlapping the elastic region where the elastic member is located in a plan view is deformed according to the wearer's gluteal groove.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 4459013

[0006] Patent Document 2: Japanese Patent Application Publication No. 2020-103884 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] As described above, it is known that absorbent articles improve fit by deforming their absorbent bodies when worn. However, when using absorbent articles that absorb excretion fluids such as urine and menstrual blood, if the user's excretion volume increases or if the user's excretion volume is initially large, it is considered to change the product to a product with a thicker or larger size to improve its absorption capacity. However, if a thicker or larger product is used, it is difficult to conform to the shape of the user's body or to wear the product correctly, and this may cause a gap between the product and the body, resulting in leakage.

[0009] In this regard, in the absorbent article of Patent Document 1, when worn, the absorbent body can be deformed into a so-called W-shape, but if the thickness of the absorbent body increases or the size of the product itself increases, such W-shape deformation becomes difficult, which may cause a gap between the product and the body, thereby reducing the fit with the body and may cause leakage. In addition, in the absorbent article of Patent Document 2, due to the elastic member provided in the transverse central portion and extending in the length direction, the absorbent body contracts to promote its deformation. Therefore, if the thickness of the absorbent body is similarly increased, this makes it less likely that the absorbent body will contract, and there is a risk that it will be difficult to achieve deformation of the absorbent body according to the wearer's gluteal groove. In other words, in the case of thicker products and in the case of absorbent articles of larger sizes, there is a demand for absorbent articles in which a gap is less likely to be generated between the body and the absorbent article and its absorption performance can be fully exhibited.

[0010] The present invention has been achieved in view of the conventional problems as described above, and one aspect of the present invention is to provide an absorbent article in which an absorbent body can fit closely over a wide area according to the shape of the wearer's body, making it less likely that a gap will be formed between the body and the absorbent article, thereby suppressing leakage.

[0011] Solutions for solving problems

[0012] The main aspect of the present invention for realizing the above-mentioned aspects is an absorbent article having a longitudinal direction, a width direction and a thickness direction which are perpendicular to each other in an unfolded state, the absorbent article comprising: a liquid-absorbing absorbent body, the central portion of the absorbent body in both the longitudinal direction and the width direction having a central deformation guide portion extending along the longitudinal direction and serving as a deformation starting point, the absorbent body having a pair of deformation guide areas which are arranged to be inclined at an angle from the end side in the width direction toward the central side in the width direction, in which the end area located on the end side in the width direction of the absorbent body is located on the inner side in the longitudinal direction of the central area located on the central side in the width direction of the absorbent body, and the deformation guide area is configured not to overlap with the central line of the absorbent article in the longitudinal direction; and a stretchable member which is stretchable in the longitudinal direction, the stretchable member being arranged at both ends in the width direction of the absorbent article and in at least the central portion of the absorbent article in the longitudinal direction.

[0013] Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to provide an absorbent article in which an absorbent body can be closely fitted over a wide area according to the shape of the wearer's body, making it less likely that a gap will be formed between the body and the absorbent article, thereby suppressing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] [ Figure 1 ] Figure 1 A is a schematic plan view of a pant-shaped disposable diaper 101 separated at the junction between the front body piece 101a and the back body piece 101b and unfolded into a plane, Figure 1 B is along Figure 1 A is a cross-sectional view taken along line AA.

[0017] [ Figure 2 ] Figure 2 It is a schematic perspective view showing replacement of the urine absorption pad 1 .

[0018] [ Figure 3 ] Figure 3 : is a schematic plan view of the urine absorption pad 1 according to the first embodiment in a developed and stretched state when viewed from the skin side.

[0019] [ Figure 4 ] Figure 4 A is along Figure 3 The cross-sectional view taken along line AA in FIG. Figure 4 B is along Figure 3 The cross-sectional view taken along line BB in FIG. Figure 4 C is along Figure 3 Cross-sectional view taken along line CC in FIG.

[0020] [ Figure 5 ] Figure 5 1 is a schematic plan view of the urine absorbent pad 1 in the unfolded and stretched state when viewed from the non-skin side.

[0021] [ Figure 6 ] Figure 6 It is a schematic diagram showing a state where the absorbent body 10 is deformed.

[0022] [ Figure 7 ] Figure 7 This is a diagram showing a state where the urine absorbent pad 1 in an unfolded state is placed on a horizontal surface under certain conditions.

[0023] [ Figure 8 ] Figure 8 1 is a schematic plan view of a portion of the urine absorbent pad 1 in a developed and stretched state when viewed from the skin side.

[0024] [ Fig. 9 ] Fig. 9 2 is a schematic perspective view of a diaper 200 according to the second embodiment.

[0025] [ Fig.10 ] Fig.10 is a plan view of the diaper 200 in an unfolded and stretched state.

[0026] [ Fig.11 ] Fig.11 It is along Fig.10 Schematic cross-sectional view taken along line CC in FIG.

[0027] [ Fig.12 ] Fig.12 A is a plan view of the absorbent body 210, Fig.12 B is along Fig.12 Schematic cross-sectional view taken along line DD in A.

[0028] [ Fig.13 ] Fig.13 It is an enlarged view of a portion of the absorbent body 210 , showing the arrangement of the front deformation guide 280 .

[0029] [ Fig.14 ] Fig.14 A modified example of the diaper 200 is shown. DETAILED DESCRIPTION

[0030] At least the following will become apparent from the description of this specification and the accompanying drawings.

[0031] Aspect 1 is an absorbent article having a longitudinal direction, a width direction and a thickness direction which are perpendicular to each other in an unfolded state, the absorbent article comprising: a liquid-absorbing absorbent body, the absorbent body having a central deformation guide portion extending along the longitudinal direction and serving as a deformation starting point in the central portion in both the longitudinal direction and the width direction, the absorbent body having a pair of deformation guide areas which are arranged to be inclined at an angle from the end side in the width direction toward the central side in the width direction, in which the end area located on the end side in the width direction of the absorbent body is located on the inner side in the longitudinal direction of the central area located on the central side in the width direction of the absorbent body, and the deformation guide area is configured not to overlap with the central line of the absorbent article in the longitudinal direction; and a stretchable member which is stretchable in the longitudinal direction, the stretchable member being arranged at both ends in the width direction of the absorbent article and in at least the central portion of the absorbent article in the longitudinal direction.

[0032] According to the absorbent article of aspect 1, when the absorbent article is worn, in the absorbent body, due to the central deformation guide and the deformation guide area, a large dome-shaped convex portion convex toward the skin side is formed in the central area corresponding to the crotch area. This convex portion makes the absorbent body closely contact with the wearer's body along the shape over a wide area, making it less likely to form a gap between the body and the absorbent article, preventing leakage.

[0033] Aspect 2 is an absorbent article according to Aspect 1, wherein the absorbent body has an absorbent core, the absorbent core has a contraction portion between the two ends in the longitudinal direction, the contraction portion has a width in the width direction that is narrower than the two ends in the longitudinal direction, and the absorbent article has at least a portion of the deformation guide area and a portion of the contraction portion overlapping relative to the longitudinal direction.

[0034] According to the absorbent article of aspect 2, in the longitudinal direction, the deformation guide area serves as a portion where rigidity changes, and the longitudinal end portion where the absorbent body is deformed convexly toward the skin side is defined by the deformation guide area. In the width direction intersecting the longitudinal direction, the contraction portion makes it easier for the absorbent core to deform in the width direction. The effects of both the deformation guide area and the contraction portion make it easier to form a three-dimensional convex portion (dome shape).

[0035] Aspect 3 is the absorbent article according to aspect 2, wherein the central region in the deformation guide region is provided in a region in the longitudinal direction where the contraction portion exists.

[0036] According to the absorbent article of aspect 3, the entire deformation guide area is located in the region of the constriction in the longitudinal direction. Since there are fewer absorbent cores, the constriction is more easily deformed, and the entire deformation guide area exists in the region of the constriction so that the absorbent body is more likely to protrude.

[0037] Aspect 4 is the absorbent article according to any one of aspects 1 to 3, wherein at least one end portion of the central deformation guide portion in the longitudinal direction has a portion overlapping the deformation guide region with respect to the longitudinal direction.

[0038] According to the absorbent article of aspect 4, the range of the portion corresponding to the peak of the convex portion protruding toward the skin side is formed sufficiently long, which is conducive to forming the convex portion that protrudes well.

[0039] Aspect 5 is an absorbent article according to any one of Aspects 1 to 4, wherein the end portion of the central deformation guide portion in the longitudinal direction is located on the inner side of the outer end of the central region of the deformation guide region in the longitudinal direction.

[0040] According to the absorbent article of aspect 5, if the central deformation guide is provided outside the deformation guide region in the longitudinal direction, deformation to form a convex portion such as a dome shape is less likely to occur. However, by positioning the central deformation guide inside, protruding deformation can be promoted.

[0041] Aspect 6 is the absorbent article according to any one of aspects 1 to 4, wherein the end region in the deformation guide region is provided in a region in the longitudinal direction where the stretchable member exists.

[0042] According to the absorbent article of aspect 6, the end region of the deformation guide area is within the range of the stretchable member, so the contraction of the stretchable member makes it easier for the absorbent body to deform from the deformation starting point as the deformation guide area.

[0043] Aspect 7 is an absorbent article according to any one of Aspects 1 to 6, wherein a pair of leak-proof wall portions are provided on both sides of the absorbent body in the width direction, the stretchable member is a leak-proof wall elastic member capable of contracting in the longitudinal direction, the leak-proof wall elastic member is arranged in the pair of leak-proof wall portions, the leak-proof wall elastic member is fixed in a state of being stretched along the longitudinal direction, and when the absorbent article is folded in half so that the skin side surface of the absorbent article faces outward and then unfolded again and placed on a horizontal plane with the non-skin side surface of the absorbent article facing downward, the height from the horizontal plane to the highest point of the leak-proof wall elastic member is lower than the height from the horizontal plane to the highest point of the absorbent body.

[0044] According to the absorbent article of aspect 7, the leakage-preventing wall elastic member is prevented from first contacting the wearer's body, making it easier for the convex portion to closely contact the body. This makes it less likely that a gap will form between the absorbent body and the body, and leakage can be suppressed.

[0045] Aspect 8 is the absorbent article according to any one of aspects 1 to 7, wherein no other contraction element that contracts along the longitudinal direction is provided inside the stretchable member in the width direction.

[0046] According to the absorbent article of aspect 8, the contraction of the stretchable member makes the central portion more likely to protrude. However, since there is no contraction element to contract the central portion in the width direction, the contraction force has no direct effect on the central portion. This enables the central portion to maintain a large amount of freedom in deformation. Therefore, when the absorbent absorbs liquid and expands, it becomes an absorbent that is more easily deformed. In the case where there is a contraction element in the central portion, the freedom of deformation in the absorbent is reduced, and the expansion of the absorbent appears convex on the skin-side surface, which may impair the fit.

[0047] Aspect 9 is the absorbent article according to any one of aspects 1 to 8, wherein the central deformation guide portion is composed of a low basis weight portion having a basis weight lower than that of a region adjacent thereto from the outside in the width direction.

[0048] According to the absorbent article of aspect 9, urine can be quickly diffused throughout the interior of the absorbent body, so that accumulation of liquid on the surface of the absorbent body can be reduced and leakage can be suppressed.

[0049] Aspect 10 is an absorbent article according to aspect 9, wherein the absorbent body has a first absorbent body and a second absorbent body, the second absorbent body is located on the non-skin side in the thickness direction relative to the first absorbent body, and the low basis weight portion is provided at least in the first absorbent body.

[0050] According to the absorbent article of aspect 10, urine can be quickly diffused throughout the interior of the absorbent body, so that accumulation of liquid on the surface of the absorbent body can be reduced and leakage can be suppressed.

[0051] Aspect 11 is an absorbent article according to any one of Aspects 1 to 10, wherein the absorbent body has a pair of liquid diffusion guide portions on one side and the other side in the longitudinal direction, the liquid diffusion guide portions extend along the longitudinal direction and are located on both sides in the width direction, and the length in the longitudinal direction from the inner end of the deformation guide area in the longitudinal direction to the outer end of the deformation guide area in the longitudinal direction is a first length, a position from the outer end of the deformation guide area in the longitudinal direction to the outer side in the longitudinal direction as the first length is a reference position, and an area in the longitudinal direction extending from the inner end of the deformation guide area in the longitudinal direction to the reference position is a designated area, and the inner ends of the pair of liquid diffusion guide portions in the longitudinal direction are both located in the designated area.

[0052] According to the absorbent article of aspect 11, when the inner ends of the pair of liquid diffusion guides in the longitudinal direction are located in the designated area, it is easier to guide the liquid accumulated around the valleys of the formed protrusions to the front and back of the absorbent body, compared with a case where the inner ends of the pair of liquid diffusion guides in the longitudinal direction are not located in the designated area. This can effectively perform absorption by using the entire absorbent body.

[0053] Aspect 12 is the absorbent article according to any one of aspects 1 to 11, wherein ends of the pair of deformation guide regions in the longitudinal direction in the central region are spaced apart in the width direction.

[0054] According to the absorbent article of aspect 12, the liquid absorbed by the central part of the absorbent body can be guided to the front and rear sides in the longitudinal direction from the separation area of ​​the pair of deformation guide areas, so that the liquid is diffused throughout the absorbent body. This can prevent the liquid from accumulating in the valley of the protrusion. This can effectively absorb by using the entire absorbent body.

[0055] Aspect 13 is the absorbent article according to any one of aspects 1 to 12, wherein the pair of deformation guide regions are provided on both one side and the other side in the longitudinal direction.

[0056] According to the absorbent article of aspect 13, by providing the deformation guide regions on both one and the other sides (the front and rear sides) in the longitudinal direction, it is easier to form a large dome-shaped convex portion protruding toward the skin side in the central region.

[0057] Aspect 14 is the absorbent article according to any one of aspects 1 to 13, wherein the absorbent article has a design visible from the skin side of the absorbent article at least in the center in the longitudinal direction and the width direction.

[0058] According to the absorbent article of aspect 14, the appearance design applied to the central portion visually emphasizes the central portion when used. The central position is a portion protruding toward the skin side when used, and by emphasizing the protrusion, the user can be given an impression of good fit and improved anti-leakage safety.

[0059] Aspect 15 is the absorbent article according to aspect 1, wherein in the unfolded and stretched state, the stretchable member is a non-skin-side stretchable member arranged on the non-skin side in the thickness direction relative to the skin-side surface of the absorbent body.

[0060] According to the absorbent article of aspect 15, the non-skin-side stretchable member (leg gathers) can further promote the contraction of the absorbent article in the longitudinal direction, making it easier to form the dome-shaped convex portion of the absorbent body.

[0061] Aspect 16 is an absorbent article according to Aspect 15, wherein the absorbent body has an absorbent core, the absorbent core has a contraction portion between the two ends in the longitudinal direction, the contraction portion has a width in the width direction that is narrower than the two ends in the longitudinal direction, the length of the contraction portion in the longitudinal direction is longer than the length of the non-skin side stretchable member in the longitudinal direction, and in the longitudinal direction, the non-skin side stretchable member is arranged in an area where the contraction portion is provided.

[0062] According to the absorbent article of aspect 16, in the absorbent core, the portion that is not the contraction portion has a wide width and high rigidity. In contrast, the contraction portion has a lower rigidity, and the entire area of ​​the non-skin-side stretchable member (leg gathers) is located within the range in the longitudinal direction of the contraction portion. This makes it easier for the absorbent body to contract in the longitudinal direction. This makes it easier to form a convex portion (dome shape), so that leakage can be suppressed.

[0063] Aspect 17 is the absorbent article according to aspect 16, wherein an outer end of the non-skin-side stretchable member in the width direction does not overlap with the absorbent core in a plan view.

[0064] According to the absorbent article of aspect 17, by shrinking the portion where the absorbent core does not exist, the absorbent article becomes easier to shrink in the longitudinal direction, so that the convex portion of the absorbent body is easier to form.

[0065] Aspect 18 is an absorbent article according to any one of Aspects 1 to 17, wherein the absorbent body has an absorbent core, and when the longitudinal direction is the front-to-back direction, the front side in the front-to-back direction corresponds to the abdominal side of the wearer, and the rear side in the front-to-back direction corresponds to the back side of the wearer, front deformation guide portions are arranged in pairs in the width direction on the front side relative to the central position in the front-to-back direction, the front deformation guide portions guide the absorbent core to deform in the thickness direction, and a pair of the front deformation guide portions each have a front inclined portion that inclines from the front side to the rear side in the front-to-back direction and from the outer side to the inner side in the width direction.

[0066] According to the absorbent article of aspect 18, when sitting or standing, the part of the absorbent core outside the front deformation guide can be deformed according to the movement of the wearer's legs so that the part is located above the part of the absorbent core inside the front deformation guide (on the skin surface side). This allows the absorbent core to be in close contact with the gap of the groin area where leakage is prone to occur, thereby suppressing leakage.

[0067] Aspect 19 is an absorbent article according to Aspect 18, wherein each of a pair of front deformation guide portions has an inclination starting point and an inclination end point, the inclination starting point is the point where the inclination of the front deformation guide portion starts, and the inclination end point is the point located on the rear side relative to the inclination starting point and where the inclination of the front deformation guide portion ends, and with respect to one side of the pair of front inclination portions, when viewed in the thickness direction, any one of the straight line connecting the inclination starting point and the inclination end point of the one side front inclination portion and the extension line of the straight line intersects with one of the pair of deformation guide areas.

[0068] According to the absorbent article of aspect 19, the deformation guiding force applied to the front inclined portion is easily transmitted to the deformation guiding area, making it easier for the absorbent to deform into a convex shape from the deformation guiding area toward the skin surface side. This makes it easier to make the absorbent in close contact, so that leakage can be prevented.

[0069] Aspect 20 is an absorbent article according to Aspect 18 or Aspect 19, wherein the absorbent body has an absorbent core, the absorbent core has a contraction portion between the two ends in the longitudinal direction, the contraction portion has a width in the width direction that is narrower than the two ends in the longitudinal direction, and the absorbent article has a portion in which the front deformation guide portion and the contraction portion overlap relative to the longitudinal direction.

[0070] According to the absorbent article of aspect 20, the contraction portion is a portion that is easy to contact with the wearer's legs, and by providing the front deformation guide along such contraction portion, it is easy to deform the portion of the absorbent core outside the front deformation guide so that the portion is located above the portion of the absorbent core inside the front deformation guide (on the skin surface side). This makes the absorbent core in close contact with the gap of the groin portion where leakage is easy to occur, so that leakage can be suppressed.

[0071] Aspect 21 is an absorbent article according to Aspect 18 or Aspect 19, wherein the absorbent body has a front central deformation guide portion, which is located between a pair of the front deformation guide portions in the width direction, extends along the front-to-back direction and serves as a deformation starting point.

[0072] According to the absorbent article of aspect 21, by deforming the portion of the absorbent body on the outside of the front deformation guide so that the portion is located above the portion of the absorbent body on the inside of the front deformation guide (on the skin surface side), and deforming the front central deformation guide to bulge downward (non-skin surface side), a space can be formed on the front side while keeping the absorbent body in close contact with the gap in the groin area where leakage is prone to occur. This space is used as a temporary storage space for urine, so that leakage in the groin area can be prevented.

[0073] ===First Embodiment===

[0074] The following describes the urine absorption pad 1 by way of example of an absorbent article according to a first embodiment of the present invention. The urine absorption pad 1 is attached to, for example, a pant-shaped disposable diaper 101 for use. Figure 1 A is a schematic plan view of a pant-shaped disposable diaper 101 separated at the junction between the front body piece 101a and the back body piece 101b and unfolded into a plane, Figure 1 B is along Figure 1 A is a cross-sectional view taken along line AA.

[0075] like Figure 1 A and Figure 1 As shown in FIG. 1B , the disposable diaper 101 has a longitudinal direction, a width direction, and a thickness direction perpendicular to each other, and includes an absorbent body 110 containing a liquid absorbent material such as pulp fibers, a liquid-permeable front sheet 130 covering the absorbent body 110 from the skin side in the thickness direction, and a liquid-impermeable back sheet 140 covering the absorbent body 110 from the non-skin side. In addition, the unfolded shape of the diaper 101 is a substantially hourglass shape having a longitudinal direction, a width direction, and a thickness direction, as shown in FIG. Figure 1 A. In other words, it has a shape in which the central portion 101m in the longitudinal direction becomes narrower in the width direction.

[0076] Here, the narrowed portion 101m is the crotch portion 101m applied to the crotch of the wearer, the portion 101a on the front side in the longitudinal direction relative to the crotch portion 101m is the front body 101a applied to the lower abdomen of the wearer, and the portion 101b on the rear side in the longitudinal direction relative to the crotch portion 101m is the back body 101b applied to the buttocks of the wearer. Then, in a state where the diaper 101 in the unfolded state is folded in half at the central position CL101 in the longitudinal direction, the width direction end 101ae2 of the front body 101a and the width direction end 101be2 of the back body 101b are joined by welding, bonding, etc. to form a waist opening and two leg openings, so that the disposable diaper 101 is in a panty-shaped state.

[0077] The diaper 101 is put on by the wearer by pulling it on like a pair of pants.

[0078] Figure 2 1 is a schematic perspective view showing the replacement of the urine absorbing pad 1. For example, when the wearer is standing or Figure 2 In the state where the diaper 101 is lowered to below the knees, the pad 1 is replaced. That is, in the state where the diaper 101 is lowered, first, the used urine absorbent pad (not shown) attached to the skin side surface of the front sheet 130 of the diaper 101 is removed from the diaper 101. Then, a new urine absorbent pad 1 prepared in advance is attached to the diaper 101. Usually, the new urine absorbent pad 1 is folded in half at the folding position CL1, which is the central position CL1 in the longitudinal direction, as shown in FIG. Figure 2As shown. Therefore, when attaching to the diaper 101, first, the urine absorbent pad 1 is placed inside the diaper 101 in such a way that the folded position CL1 is at the front, and then the folded position CL1 is gently pressed against the skin-side surface of the front sheet 130 of the diaper 101. Next, the folded urine absorbent pad 1 is opened to both sides in the longitudinal direction, so that the pad 1 is unfolded into a plane, and then the urine absorbent pad 1 in the unfolded state is fixed to the skin-side surface of the front sheet 130 of the diaper 101. This fixing is performed, for example, by attaching the male members 81 and 81( Figure 5 ) is joined with the front sheet 130 of the diaper 101. Then, by pulling the diaper 101 upwards to the waist of the wearer, the replacement of the urine absorbing pad 1 is completed.

[0079] Figure 3 : is a schematic plan view of the urine absorption pad 1 according to the first embodiment in a developed and stretched state when viewed from the skin side. Figure 4 A is along Figure 3 The cross-sectional view taken along line AA in FIG. Figure 4 B is along Figure 3 The cross-sectional view taken along line BB in FIG. Figure 4 C is along Figure 3 Cross-sectional view taken along line CC in FIG. Figure 5 1 is a schematic plan view of the urine absorbent pad 1 in the unfolded and stretched state when viewed from the non-skin side.

[0080] like Figure 3 As shown, the urine absorbing pad has three directions orthogonal to each other: a longitudinal direction, a width direction, and a thickness direction. The planar shape defined in the longitudinal direction and the width direction of the urine absorbing pad is an approximately rectangular shape, which is an example of a longitudinally long shape. However, the shape is not limited thereto, and may be, for example, a substantially hourglass shape.

[0081] In the following, with respect to the thickness direction, the side in contact with the user's body is also referred to as the "skin side", and the side in contact with the diaper 101 is also referred to as the "non-skin side". The longitudinal direction is also referred to as the "front-back direction", and the width direction is also referred to as the "left-right direction". When the urine absorbent pad 1 is worn on the user, the front side of the pad 1 in the longitudinal direction faces the user's ventral side, and the rear side faces the user's dorsal side. In addition, the urine absorbent pad has a dimension in the longitudinal direction that is longer than that in the width direction, and a dimension in the width direction that is longer than that in the thickness direction.

[0082] In addition, the expanded state of the urine absorbent pad refers to a state in which the urine absorbent pad is expanded on a flat surface by spreading the urine absorbent pad in the longitudinal direction. In addition, the "stretched state" of the urine absorbent pad refers to a state in which the urine absorbent pad as a whole (the entire product) is stretched to eliminate wrinkles, specifically, the size of the parts constituting the urine absorbent pad 1 (for example, the retractable member (leakage-proof wall elastic member 55, non-skin side retractable member 57, etc.) described later is the same as or close to the size of the parts in the single state (that is, the size in the state in which the elasticity of the elastic member is not exhibited).

[0083] <Basic structure of urine absorbent pad>

[0084] like Figure 3 , Figure 4 A to Figure 4 C and Figure 5 As shown, the urine absorbing pad 1 includes: a liquid-absorbent absorbent body 10 for absorbing urine; a liquid-permeable front sheet 30 covering the absorbent body 10 from the skin side in the thickness direction; a liquid-impermeable back sheet 40 covering the absorbent body 10 from the non-skin side; and side sheets 50 and 50 for forming leakage-proof wall portions 52 and 52 in the width direction end portions 30e2 and 30e2 of the front sheet 30.

[0085] The absorbent body 10 of this embodiment has a two-layer structure in the thickness direction. That is, the absorbent body 10 has a first absorbent body 11 disposed on the skin side in the thickness direction, and a second absorbent body 21 disposed adjacent to the first absorbent body 11 and located on the non-skin side in the thickness direction relative to the first absorbent body 11. The absorbent body 10 having a two-layer structure will be described later.

[0086] The front sheet 30 collects the excreted urine, absorbs it quickly in the thickness direction, and guides the urine to the absorbent body 10. Figure 3 and Figure 4 A to Figure 4 C, a flat sheet capable of covering most of the skin-side surface of the absorbent body 10 is used, and a substantially rectangular sheet is used in this example. The material for the front sheet 30 is a nonwoven fabric such as an air-permeable nonwoven fabric and a spunbonded nonwoven fabric, and the constituent fibers of the nonwoven fabric are thermoplastic resin fibers such as polyethylene and polyethylene terephthalate. However, sheets made of materials other than these materials may be used as long as they have a certain degree of liquid permeability and softness.

[0087] The back sheet 40 is a leak-proof sheet that prevents urine from leaking from the non-skin side of the urine absorbent pad 1. Figure 5 As shown, the planar shape of the back sheet 40 is substantially rectangular. For example, the outer peripheral edge of the sheet 40 protrudes outwardly beyond the absorbent body 10 in the longitudinal direction, and the central portion of the sheet 40 in the longitudinal direction protrudes outwardly beyond the absorbent body 10 in the width direction.

[0088] Furthermore, the peripheral edge of the sheet 40 may extend outwardly beyond the absorbent body 10 over its entire circumference. Figure 4 As shown in FIG. 3 , the edge portions 40ee2 and 40ee2 in the width direction of the absorbent body 10 placed on the back sheet 40 are rolled up to the skin side in the thickness direction. Therefore, the edge portions 40ee2 and 40ee2 of the sheet 40 cover the edge portions 30ee2 and 30ee2 in the width direction of the front sheet 30 from the skin side. The material of the back sheet 40 can be, for example, a resin film such as a polyethylene film. However, sheets made of materials other than these materials can be used as long as they have a certain degree of liquid impermeability and softness.

[0089] The side sheets 50 are sheets that form leak-proof wall portions 52 and 52 at the corresponding widthwise ends 30e2 and 30e2 of the front sheet 30. Figure 4 A and Figure 4 B. The anti-leakage wall 52 prevents urine from leaking in the width direction of the urine absorbing pad 1. Figure 3 , Figure 4 A and Figure 4 B, the side pieces 50 are all joined and fixed to the front piece 30 and the back piece 40 at the positions of the corresponding widthwise end 30e2 of the front piece 30 and the corresponding widthwise end 40e2 of the back piece 40 by adhesive (not shown), and these ends 30e2 and 40e2 are covered in a manner spanning these ends 30e2 and 40e2. In addition, the portion 50b of the side piece 50 fixed to the end 30e2 of the front piece 30 becomes the base 50b of the leakproof wall portion 52. That is, the portion of the side piece 50 closer to the center than the base 50b in the width direction is the free end 50f that can stand up from the front piece 30. The leakproof wall elastic member 55 (corresponding to the retractable member) that can shrink in the longitudinal direction is fixed to the free end 50f by adhesive in a state of being stretched in the longitudinal direction. Examples of the leakproof wall elastic member 55 include elastic lines, etc.

[0090] Due to the contraction of the leakage-preventing wall elastic member 55 in the longitudinal direction, the urine absorbing pad 1 is folded as a whole in the longitudinal direction in such a manner that the front sheet 30 is located on the inner peripheral side. However, during this folding, due to the contraction force applied by the leakage-preventing wall elastic member 55, the free end portion 50f contracts in the longitudinal direction and stands up from the front sheet 30. This allows the free end portion 50f to function as the leakage-preventing wall portion 52.

[0091] Examples of the material of such side sheets 50 include, for example, SMS nonwoven fabric that has been treated to be waterproof. However, the present invention is not limited thereto, and sheets made of materials other than this material may be used as long as they have a certain degree of softness.

[0092] <Absorber 10>

[0093] like Figures 3 to 5 As shown, the urine absorption pad 1 includes an absorbent body 10 having a two-layer structure.

[0094] That is, the absorbent body 10 includes a first absorbent body 11 and a second absorbent body 21. The first absorbent body 11 includes a liquid absorbent material such as pulp fiber, and the second absorbent body 21 also includes a liquid absorbent material such as pulp fiber. Figure 3 , Figure 4 A and Figure 4 As shown in FIG. 1B , each of the first absorbent body 11 and the second absorbent body 21 has a central deformation guide portion 10S extending in the longitudinal direction and serving as a deformation starting point in the central portion in the longitudinal direction and the width direction. More specifically, the central deformation guide portion 10S includes a central deformation guide portion 11S of the first absorbent body 11 and a central deformation guide portion 21S of the second absorbent body 21, which will be described later. In the present embodiment, the central deformation guide portion 10S is composed of a low basis weight portion 10S having a basis weight (g / m 2) lower than the basis weight of the liquid absorbent material in the region adjacent thereto from the outside in the width direction. 2 ). In this example, the low basis weight portion 10S is defined as a portion having a zero basis weight, i.e., a space, but the present invention is not limited thereto. In addition, preferably, the low basis weight portion 10S is formed at a position corresponding to the urination point when the urine absorption pad 1 is worn. The central deformation guide portion 10S (low basis weight portion 10S) allows urine to quickly diffuse throughout the interior of the absorbent body 10, so that the accumulation of liquid on the surface of the absorbent body 10 can be reduced and leakage can be suppressed. In addition, the central deformation guide portion 10S is not limited to being composed of a low basis weight portion, and can be, for example, a compressed portion (compression groove) formed by embossing or the like. The details of the deformation of the absorbent body 10 promoted by the central deformation guide portion 10S will be described later.

[0095] The first absorbent body 11 and the second absorbent body 21 related to the absorbent body 10 of the two-layer structure are described in detail below. The first absorbent body 11 has a first absorbent core 13 obtained by molding a liquid absorbent material into a predetermined shape. An example of obtaining the first absorbent core 13 by molding a mixture of liquid absorbent fibers and liquid absorbent granules as liquid absorbent materials into a predetermined shape. In this example, pulp fibers are used as liquid absorbent fibers, and superabsorbent polymers (so-called SAPs) are used as liquid absorbent granules. However, the present invention is not limited to this. In addition, the liquid absorbent material may include only any one of the liquid absorbent fibers or the liquid absorbent granules, or different types of liquid absorbent materials may be mixed in addition to or instead of any one of the above two types of liquid absorbent materials.

[0096] like Figure 3As shown, the first absorbent core 13 is formed by depositing the above-mentioned liquid absorbent material in the thickness direction so that the plane shape of the core 13 is substantially hourglass-shaped. That is, the first absorbent core 13 has a contraction portion 13c between both ends in the longitudinal direction, and the width in the contraction portion 13c is narrower than that in both ends in the longitudinal direction. The contraction portion 13c has the narrowest width in the width direction in the central portion in the longitudinal direction of the core 13.

[0097] Moreover, the 1st absorptive core 13 has the said central deformation guiding part 11S in the center part.

[0098] As described above, in this example, since the basis weight of the central deformation guiding portion 11S constituted by the low basis weight portion is zero, the central deformation guiding portion 11S penetrates the first absorbent core 13 in the thickness direction.

[0099] The central deformation guiding portion 11S has a longitudinal shape when viewed in the thickness direction, wherein the dimension in the longitudinal direction is greater than the dimension in the width direction, such as Figure 3 More specifically, as an example of a longitudinally long shape, the central deformation guide portion 11S of the present embodiment has an elliptical shape extending in the longitudinal direction and a substantially hourglass shape whose central portion in the longitudinal direction is narrow.

[0100] In addition, if Figure 3 As shown, in this embodiment, when the range in the longitudinal direction from the front contraction starting position 13cp to the rear contraction starting position 13cn of the contraction portion 13c of the first absorbent core 13 is defined as "the area where the contraction portion 13c exists", the central deformation guide portion 11S is located in the area where the contraction portion 13c exists in the longitudinal direction.

[0101] In addition, if Figure 4 A to Figure 4 As shown in Figure C, the first absorbent core 13 is covered by a core wrapping sheet 15 made of tissue paper or the like so as to suppress the collapse of the core 13 and maintain its shape. For example, in the present embodiment, the core wrapping sheet 15 is rolled in the width direction so as to cover the entire outer peripheral surface of the first absorbent core 13, and the seam of the core wrapping sheet 15 is located on the non-skin side surface of the first absorbent core 13. However, the present invention is not limited to this. For example, the core wrapping sheet 15 can be rolled in the longitudinal direction so as to cover the entire outer peripheral surface of the first absorbent core 13, or the seam can be located on the skin side surface of the first absorbent core 13. In addition, the core wrapping sheet 15 is not limited to tissue paper, and can be a sheet having a certain degree of liquid permeability and softness.

[0102] In addition, the core wrapping sheet 15 and the first absorbent core 13 are at least partially bonded to each other using an adhesive such as a hot melt adhesive. For example, it is preferred that the core wrapping sheet 15 is bonded to the skin-side surface of the first absorbent core 13 using an adhesive, and is also bonded to the non-skin-side surface of the same core 13 using an adhesive. This makes it easier for the first absorbent core 13 to transfer stress between the second absorbent body 21 via the core wrapping sheet 15, so that positional deviation in the thickness direction between the portions 11cs and 11cs of the first absorbent body 11 located on both sides in the width direction of the central deformation guide 11S can be suppressed.

[0103] Figure 4 A to Figure 4 The second absorbent body 21 shown in C also has a second absorbent core 23 obtained by molding a liquid absorbent material similar to the above. Figure 3 As shown, the second absorbent core 23 is formed by depositing the above-mentioned liquid absorbent material in the thickness direction so that the plane shape of the core 23 is longitudinally long and substantially hourglass-shaped. That is, the second absorbent core 23 has a contraction portion 23c between both ends in the longitudinal direction, and the width in the contraction portion 23c is narrower than that in both ends in the longitudinal direction. The contraction portion 23c has the narrowest width in the width direction in the central portion of the core 23 in the longitudinal direction.

[0104] Here, it is desirable that when the dimensions in the width direction are compared at the same position in the longitudinal direction, the dimension in the width direction of the second absorbent core 23 is less than or equal to the dimension in the width direction of the first absorbent core 13. And, for example, in the present embodiment, the dimension in the width direction of the second absorbent core 23 is less than the minimum value of the dimension in the width direction of the first absorbent core 13 at the central portion in the longitudinal direction. Therefore, in the central portion in the longitudinal direction, the second absorbent core 23 does not protrude beyond the first absorbent core 13 on both sides in the width direction. By doing so, it is possible to effectively prevent Figure 4 The widthwise outer side ends 23ee and 23ee of the second absorbent core 23 shown in A come into hard contact with the crotch of the wearer, causing discomfort to the wearer.

[0105] The second absorbent core 23 also has the above-mentioned central deformation guide part 21S in the central part in both the longitudinal direction and the width direction. As described above, in this example, since the basis weight of the central deformation guide part 21S composed of the low basis weight part is zero, the central deformation guide part 21S penetrates the second absorbent core 23 in the thickness direction.

[0106] The central deformation guiding portion 21S has a longitudinal shape when viewed in the thickness direction, wherein the dimension in the longitudinal direction is greater than the dimension in the width direction, such as Figure 3More specifically, as an example of a longitudinally long shape, the central deformation guiding portion 21S of the present embodiment is an elliptical shape extending in the longitudinal direction.

[0107] In addition, if Figure 3 As shown, in this embodiment, when the range in the longitudinal direction from the front contraction starting position 23cp to the rear contraction starting position 23cn of the contraction portion of the second absorbent core 23 is defined as "the area where the contraction portion 23c exists", the central deformation guide portion 21S is located in the area where the contraction portion 23c exists in the longitudinal direction.

[0108] In addition, Figure 3 , Figure 4 A and Figure 4 The dimension in the width direction of the central deformation guiding portion 21S shown in B is smaller than the dimension in the width direction of the central deformation guiding portion 11S at the same position in the longitudinal direction. Therefore, the second absorbent body 21 can be reliably laid over the portions 11cs and 11cs of the first absorbent body 11 located on both sides in the width direction of the central deformation guiding portion 11S, thereby suppressing positional deviation in the thickness direction between the portions 11cs and 11cs.

[0109] In addition, if Figure 4 A to Figure 4 As shown in Figure C, the second absorbent core 23 is also covered by a core wrapping sheet 25 made of tissue paper or the like so as to suppress the collapse of the core 23 and maintain its shape. For example, in the present embodiment, the core wrapping sheet 25 is rolled in the width direction so as to cover the entire outer peripheral surface of the second absorbent core 23, and the seam of the core wrapping sheet 25 is located on the skin side surface of the second absorbent core 23. However, the present invention is not limited to this. For example, the core wrapping sheet 25 can be rolled in the longitudinal direction so as to cover the entire outer peripheral surface of the second absorbent core 23, or the seam can be located on the non-skin side surface of the second absorbent core 23. In addition, the core wrapping sheet 25 is not limited to tissue paper, and can be a sheet having a certain degree of liquid permeability and softness.

[0110] In addition, the core wrap sheet 25 and the second absorbent core 23 are at least partially bonded to each other using an adhesive such as a hot melt adhesive, etc. For example, it is preferred that the core wrap sheet 25 is bonded to the skin side surface of the second absorbent core 23 using an adhesive, and is also bonded to the non-skin side surface of the same core 23 using an adhesive.

[0111] As described above, the first absorbent body 11 is an absorbent body obtained by covering the first absorbent core 13 with the core wrapping sheet 15, and similarly, the second absorbent body 21 is an absorbent body obtained by covering the second absorbent core 23 with the core wrapping sheet 25. Therefore, an adhesive (not shown) for joining the first absorbent body 11 and the second absorbent body 21 is applied to at least either one of the two core wrapping sheets 15 and 25, and the adhesive joins the two core wrapping sheets 15 and 25 together, thereby joining the first absorbent body 11 and the second absorbent body 21.

[0112] Examples of the above-mentioned coating pattern of the adhesive such as hot melt adhesive include: a stripe pattern in which a plurality of linear portions extending along the longitudinal direction are arranged side by side in the width direction; a spiral pattern in which a plurality of spiral portions extending along the longitudinal direction are arranged side by side in the width direction; etc. However, the present invention is not limited thereto.

[0113] As mentioned above, in Figure 4 A to Figure 4 In C, it has been described that "the end portions 40e2 and 40e2 in the width direction of the back sheet 40 are covered by the side sheets 50 and 50, respectively." However, in the covered portion 40e2, the non-skin-side stretchable member 57 (corresponding to the stretchable member) such as an elastic thread that stretches in the longitudinal direction is positioned to extend in the longitudinal direction ( Figure 3 ), and the non-skin side stretchable member 57 is fixed to both the back sheet 40 and the side sheet 50 by an adhesive in a state stretched in the longitudinal direction. Figure 3 As shown, the position at which the non-skin side stretchable member 57 is fixed is a position spaced apart from the narrowest width portion in the width direction of the contraction portion 13c of the first absorbent core 13 by a specific distance toward the end portion in the width direction. This position corresponds to the position of the wearer's leg circumference. Therefore, by contracting the back sheet 40 and the side sheet 50 due to the contraction force of the non-skin side stretchable member 57, a so-called leg gather is formed at this position. In other words, it is sufficient for the non-skin side stretchable member 57 to be arranged at both end portions in the width direction of the urine absorption pad 1 (absorbent article) and in at least the central portion in the longitudinal direction of the urine absorption pad 1. In addition, as Figure 4 A and Figure 4 As shown in B, the non-skin-side stretchable member 57 is positioned on the non-skin side with respect to the skin-side surface of the absorbent body 10 in the thickness direction.

[0114] Furthermore, in the present embodiment, two non-skin side stretchable members 57 (stretchable members) are provided on each of the two sides in the width direction of the urine absorption pad 1, but the number of the non-skin side stretchable members 57 is not limited thereto. Furthermore, the non-skin side stretchable members 57 are not limited to elastic wires. For example, a plurality of stretchable sheets may be placed at intervals in the width direction, or a single sheet may be placed. In addition, Figure 3Only the portion showing stretchability (so-called effective length portion) of each non-skin-side stretchable member 57 is shown. Therefore, the entire portion in the longitudinal direction of the non-skin-side stretchable member 57 shown is a stretchable region.

[0115] In addition, the absorbent body 10 (the first absorbent body 11 and the second absorbent body 21) has a pair of deformation guide areas 60 arranged to be inclined at an angle from the end side in the width direction toward the center side in the width direction. In this example, the deformation guide area 60 is composed of a compression groove formed by embossing. The pair of deformation guide areas 60 is an area where the rigidity of the absorbent body 10 changes due to such compression, and is the starting point of the deformation of the absorbent body 10. In addition, in the present embodiment, a pair of deformation guide areas 60 are provided on one side (front side) and the other side (rear side) in the longitudinal direction of the absorbent body 10. In the deformation guide area 60, the end areas 60et and 60et located on the end side in the width direction of the absorbent body 10 are arranged to be located on the inner side of the central areas 60ct and 60ct in the longitudinal direction, and the central areas 60ct and 60ct are located on the center side in the width direction of the absorbent body 10. In addition, the deformation guide area 60 is configured not to overlap with the longitudinal center line CL1 of the urine absorption pad 1. The details of how the deformation guide area 60 promotes the deformation of the absorbent body 10 will be described below.

[0116] like Figure 3 and Figure 4 As shown in FIG. 3C, in the present embodiment, the absorbent body 10 has a pair of liquid diffusion guides 70 and 70 obtained by compressing the first absorbent body 11 and the second absorbent body 21 together from the skin side in the thickness direction. The paired liquid diffusion guides 70 extend along the longitudinal direction on both sides in the width direction of the absorbent body 10, and are also arranged on one side (front) and the other side (rear) in the longitudinal direction. The outer end in the longitudinal direction of each of the pair of liquid diffusion guides 70 is arranged at the outer end in the longitudinal direction of each of the first absorbent body 11 and the second absorbent body 21. Urine absorbed by the first absorbent body 11 and the second absorbent body 21 is diffused in the longitudinal direction through the liquid diffusion guides 70. This allows urine to be absorbed in the entire absorbent body 10.

[0117] By the way, in an absorbent article for absorbing urine such as a urine absorbing pad, when the amount of incontinence increases with age or worsening of symptoms, it is considered to improve the absorption capacity by using a thicker or larger product. However, in the case of such a thicker or larger pad, it is difficult to conform to the shape of the user's body or wear it correctly, and this may cause a gap between the pad and the body, resulting in leakage. Therefore, a pad that does not generate a gap between the user's body and the absorbent article and can fully exhibit its absorption performance is required.

[0118] In this regard, in the present embodiment, by deforming the convenient absorbent body 10 as described below, a gap is less likely to be generated between the user's body and the urine absorption pad 1 . Figure 6 It is a schematic diagram showing a state where the absorbent body 10 is deformed. Figure 6 The state of the urine absorbent pad 1 when it is attached to the diaper 101 and worn by the user is shown. When the urine absorbent pad 1 is worn, due to the contraction force of the non-skin side stretchable member 57, the back sheet 40 and the side sheet 50 contract on the non-skin side of the urine absorbent pad 1 to form so-called leg gathers, and the contraction force along the longitudinal direction is thus applied to the absorbent body 10. In addition, the absorbent body 10 (first absorbent body 11 and second absorbent body 12) of the present embodiment has a central deformation guide portion 10S (11S and 21S). And in the central portion 1C in the longitudinal direction of the absorbent body 10, in the two layers of the absorbent body (first absorbent body 11 and second absorbent body 12), the dimension in the width direction of the second absorbent core 23 on the lower side (non-skin side) is smaller than the dimension in the width direction of the first absorbent core 13 on the upper side (skin side) (see Figure 3 and Figure 4 Similarly, in the central portion 1C in the longitudinal direction, the dimension in the width direction of the central deformation guiding portion 11S of the first absorbent body 11 is smaller than the dimension in the width direction of the central deformation guiding portion 21S of the second absorbent body 21 ( Figure 4 A). The central deformation guide 10S (11S and 21S) is a low basis weight portion having a zero basis weight as described above, i.e., it is a portion where the rigidity of the absorbent body 10 changes and the deformation of the absorbent body 10 is promoted. When the urine absorption pad 1 is worn, the crotch tightening force of the wearer is applied to the central portion 1C in the longitudinal direction of the urine absorption pad 1 from both sides in the width direction, and due to the action of this crotch tightening force, the absorbent body 10 is deformed from the central deformation guide 10S (11S and 21S). In this case, the dimensions in the width direction of the absorbent body (second absorbent body 21) located on the non-skin side and the central deformation guide 21S located on the non-skin side are smaller than the dimensions in the width direction of the absorbent body (first absorbent body 11) located on the skin side and the central deformation guide 11S located on the skin side. Therefore, the absorbent body 10 is deformed in such a manner that it bulges toward the skin side starting from the central deformation guide 10S.

[0119] Then, due to the contraction of the non-skin side stretchable member 57 and the anti-leakage wall elastic member 55, the contraction force in the longitudinal direction acts on each of the pair of deformation guide areas 60 and 60, and the end portion in the longitudinal direction of the absorbent body 10 that is deformed convexly toward the skin side is defined along the pair of deformation guide areas 60 and 60. That is, the convex deformation from the deformation starting point toward the skin side is promoted, and the deformation starting point is the pair of deformation guide areas 60 and 60. In this way, in the absorbent body 10, due to the central deformation guide portion 10S (11S and 21S) and the pair of deformation guide areas 60 and 60, a convex deformation is formed as follows: Figure 6 A large dome-shaped raised portion R is shown raised toward the skin side in the central area corresponding to the crotch area. The raised portion R allows the absorbent body 10 to be in close contact with the wearer's body along the shape over a wide area, making it less likely that a gap will be formed between the body and the urine absorbent pad 1. As a result, leakage can be suppressed.

[0120] In the present embodiment, a pair of deformation guide regions 60 and 60 are provided on both one side (front) and the other side (rear) in the longitudinal direction, so that it is easier to form a single large convex portion R protruding toward the skin side in the central portion 1C in the longitudinal direction. However, it is not necessary to provide a pair of deformation guide regions 60 and 60 on both one side (front) and the other side (rear) in the longitudinal direction. By providing a pair of deformation guide regions 60 and 60 on at least one of the one side or the other side in the longitudinal direction, the absorbent body 10 is more likely to protrude toward the skin side from the deformation guide regions 60 and 60 where the rigidity changes, on the side where the deformation guide regions 60 are provided.

[0121] The shape of the pair of deformation guide regions 60 and 60 is not limited to that of the present embodiment. For example, the pair of deformation guide regions 60 and 60 may each be formed of a straight line region or an arc region.

[0122] In addition, it is preferable that the dimension in the longitudinal direction of the raised portion R raised toward the skin side at the crotch region when worn is 50% or less of the dimension in the longitudinal direction of the first absorbent core 13 or the second absorbent core 23 .

[0123] By having such a size, the raised portion R can be in close contact with the crotch area of ​​the wearer without being too tight or too loose, so that the wearer's body can be prevented from being separated from the absorbent body 10 in the front-rear direction of the body. This makes it less likely that a gap will be formed between the body and the urine absorbent pad 1, and makes it possible to suppress leakage.

[0124] Furthermore, when the absorbent body 10 is deformed during wearing to form the convex portion R, preferably, the narrowest width in the width direction of the region of the absorbent body 10 where the convex portion R is formed is 75% or less of the dimension in the longitudinal direction of the convex portion R. Since the convex portion R has such a size, the convex portion R can be accommodated just enough for the crotch region of the wearer. As a result, the absorbent body 10 can be prevented from being separated from the body in the left-right direction of the body, making it less likely that a gap will be formed between the body and the urine absorption pad 1.

[0125] In addition, preferably, in the longitudinal direction, there is a portion where at least a portion of a pair of deformation guide regions 60 and 60 overlaps with the contraction portion 13c of the first absorbent core 13 (contraction portion 23c of the second absorbent core 23). In the present embodiment, relative to the longitudinal direction, a pair of deformation guide regions 60 and 60 overlap with the contraction portion 13c of the first absorbent core 13 (contraction portion 23c of the second absorbent core 23). In the longitudinal direction, the deformation guide regions 60 and 60 serve as regions where rigidity changes, and define the end portion in the longitudinal direction where the absorbent body 10 convexly deforms toward the skin side along the deformation guide regions 60 and 60. In the width direction intersecting the longitudinal direction, the contraction portion 13c (23c) makes it easier for the absorbent body 10 to deform in the width direction. The effects of both the deformation guide regions 60 and 60 and the contraction portion 13c (23c) make it easier to form a more three-dimensional convex portion R.

[0126] Moreover, if Figure 3 As shown, the length L13c (L23c) of the contraction part 13c (23c) in the longitudinal direction is longer than the length L57 of the non-skin side retractable member 57 in the longitudinal direction, that is, in the longitudinal direction, the non-skin side retractable member 57 is arranged in the area where the contraction part 13c (23c) is arranged. The area provided with the contraction part 13c (23c) refers to the area where the contraction part 13c (23c) exists in the longitudinal direction. In the first absorbent core 13 and the second absorbent core 23, the part that is not the contraction part 13c and 23c has a wide width direction size and high rigidity. Compared with the part that is not the contraction part 13c and 23c, the contraction part 13c and 23c have lower rigidity, and the entire area of ​​the non-skin side retractable member 57 is located in the range in the longitudinal direction where the contraction part 13c and 23c are arranged. This makes it easier for the absorbent body 10 to shrink in the longitudinal direction. This makes it easier to form the dome-shaped protrusion R.

[0127] In addition, it is desirable that the outer end of the non-skin side stretchable member 57 in the width direction does not overlap with the first absorbent core 13 and the second absorbent core 23 in a plan view. Here, "the outer end of the non-skin side stretchable member 57 in the width direction" refers to the outer end of the non-skin side stretchable member 57 in the width direction located on the outer side of the two non-skin side stretchable members 57 and 57 located on both sides in the width direction.

[0128] In addition, in the case where the non-skin side stretchable member 57 is different from the present embodiment, for example, in the case where a strip-shaped (sheet-shaped) stretchable member is provided on each side in the width direction, this means the outer end in the width direction of the strip-shaped stretchable member. With this configuration, the portion where the first absorbent core 13 and the second absorbent core 23 do not exist can be contracted by the non-skin side stretchable member 57. This makes it easier for the urine absorption pad 1 to contract in the longitudinal direction, making it easier to form the convex portion R by deformation of the absorbent body 10.

[0129] In addition, the urine absorbent pad 1 of the present embodiment has the leakage-proof wall elastic member 55 constituting the leakage-proof wall portion 52 and the non-skin-side stretchable member 57 forming the leg gathers, and it is desirable that the stress of the non-skin-side stretchable member 57 is greater than the stress of the leakage-proof wall elastic member 55. The stress here does not refer to the stress of each non-skin-side stretchable member 57 or the stress of each leakage-proof wall elastic member 55, but refers to the stress of the entire non-skin-side stretchable member 57 and the stress of the entire leakage-proof wall elastic member 55.

[0130] Furthermore, the end regions 60et and 60et of a pair of deformation guide regions 60 and 60 are arranged in the region in the longitudinal direction where the contraction portion 13c of the first absorbent core 13 exists. Similarly, the end regions 60et and 60et of a pair of deformation guide regions 60 and 60 are arranged in the region in the longitudinal direction where the contraction portion of the second absorbent core 23 exists. In the contraction portion 13c (23c), the first absorbent core 13 (second absorbent core 23) exists less, so the absorbent body 10 (11, 21) is easily deformed, making it easier to form the convex portion R. By providing the end regions 60et and 60et of the deformation guide regions 60 and 60 as the starting point of the rigidity change in such a region, the absorbent body 10 is more likely to protrude.

[0131] In addition, in the present embodiment, the central regions 60ct and 60ct of the deformation guide regions 60 and 60 are arranged in the region in the longitudinal direction of the contraction portion 13c of the first absorbent core 13. In addition, the central regions 60ct and 60ct of the deformation guide regions 60 and 60 are arranged in the region in the longitudinal direction of the contraction portion 23c of the second absorbent core 23. That is, the entire deformation guide region 60 is located in the region of the contraction portion 13c (23c) in the longitudinal direction. Since the first absorbent core 13 (second absorbent core 23) is less present, the contraction portion 13c (23c) is more easily deformed, and the deformation guide region 60 as a whole is present in the region of the contraction portion 13c (23c), making it easier for the absorbent body 10 to protrude.

[0132] In addition, in the present embodiment, as described above, the central deformation guide 10S is located in the region in the longitudinal direction where the contraction portion 13c (23c) exists. When the central deformation guide 10S is longer than the contraction portion 13c (23c) in the longitudinal direction, it becomes difficult for the absorbent body 10 to be deformed into a convex shape toward the skin side within the range of the contraction portion 13c (23c). However, when the central deformation guide 10S is within the range of the contraction portion 13c (23c), it becomes easier for the absorbent body 10 to be deformed into a convex shape toward the skin side within the range of the contraction portion 13c (23c).

[0133] In this embodiment, if Figure 3 As shown, the front end portion 10Sea and the rear end portion 10Seb in the longitudinal direction of the central deformation guide portion 10S have a portion overlapping with the deformation guide region 60 with respect to the longitudinal direction. When the absorbent body 10 is deformed during wearing to form the protrusion R, the central deformation guide portion 10S becomes a portion corresponding to the peak of the protrusion R. Since the central deformation guide portion 10S extends to a position overlapping with the deformation guide region 60 with respect to the longitudinal direction, the range of the portion corresponding to the peak of the protrusion R protruding toward the skin side becomes sufficiently long. This helps to form a well-protruding protrusion. In addition, in the present embodiment, both the end portions 10Sea and 10Seb in the longitudinal direction of the central deformation guide portion 10S have a portion overlapping with the deformation guide regions 60 and 60 with respect to the longitudinal direction, but the present invention is not limited to this. It is sufficient that at least one of the end portions 10Sea and 10Seb has a portion overlapping with the deformation guide region 60 with respect to the longitudinal direction.

[0134] Moreover, if Figure 3As shown, the ends 10Sea and 10Seb in the longitudinal direction of the central deformation guide 10S are both located in the longitudinal direction inside the outer end 60se in the longitudinal direction of the central area 60ct of the deformation guide region 60. If the central deformation guide 10S is disposed outside the deformation guide region 60 in the longitudinal direction, the absorbent body 10 is less likely to be deformed into a convex portion such as a dome shape when the urine absorption pad 1 is worn. However, by positioning the central deformation guide 10S within the range in the longitudinal direction where a pair of deformation guide regions 60 exist, protruding deformation of the dome shape can be promoted.

[0135] like Figure 3 As shown, the end region 60et of the desired deformation guide region 60 is set in the region in the longitudinal direction where the non-skin side elastic member 57 exists. The region where the non-skin side elastic member 57 exists refers to the portion of each non-skin side elastic member 57 that exhibits elasticity (the so-called effective length portion). Figure 3 The non-skin side elastic member 57 shown shows only the effective length portion. Since the end region 60et of the deformation guide region 60 is within the region in the longitudinal direction where the non-skin side elastic member 57 exists, the contraction force of the non-skin side elastic member 57 is more likely to act on the end region 60et. This makes it easier for the absorbent body 10 to deform from the deformation starting point, which is the deformation guide region 60.

[0136] Figure 7 1 is a diagram showing a state where the urine absorbing pad 1 in an unfolded state is placed on a horizontal surface under certain conditions. Here, in order to show the deformed state of the absorbent body 10 similar to when the urine absorbing pad 1 is worn, Figure 7 A portion of the urine absorbing pad 1 is shown in the following state: the urine absorbing pad 1 is folded in half so that the skin side surface of the urine absorbing pad 1 faces the outside, and then unfolded again, and placed on a horizontal surface with the non-skin side surface of the urine absorbing pad 1 facing downward. In this state, a raised portion R is generated in the longitudinal central portion 1C of the urine absorbing pad 1 by deformation of the absorbent body 10. Then, the height from the horizontal plane to the highest point P2 where the height of the leak-proof wall elastic member 55 is the highest is H2, and the height from the horizontal plane to the highest point P1 where the height of the absorbent body 10 is the highest is H1, and the height H2 is lower than the height H1 (H1>H2). By deforming in this way, the leak-proof wall elastic member 55 is prevented from first contacting the body of the wearer, so that the raised portion R is more likely to be in close contact with the body. This makes it less likely that a gap will be formed between the absorbent body 10 and the body, and leakage can be suppressed.

[0137] In addition, in order to promote the protruding deformation in the central part of the absorbent body 10 in the longitudinal direction and the width direction, it is desirable that other contraction elements that shrink along the longitudinal direction are not provided on the inner side of the non-skin side telescopic members 57 and 57 and the leak-proof wall elastic member 55 in the width direction. In the present embodiment, the contraction of the non-skin side telescopic members 57 and 57 and the leak-proof wall elastic member 55 further facilitates the protrusion in the central part of the absorbent body 10 in the longitudinal direction and the width direction. However, since there is no contraction element to shrink the central part in the width direction, the contraction force does not have a direct effect on the central part in the width direction of the absorbent body 10. This enables the central part to maintain a large number of degrees of freedom in terms of deformation. Therefore, when the absorbent body 10 absorbs liquids such as urine and expands, the absorbent body 10 becomes easier to deform. On the contrary, in the case of the presence of a contraction element in the central part in the width direction of the urine absorption pad 1, the degree of freedom in terms of deformation in the absorbent body 10 is reduced, and the expansion of the absorbent body 10 presents a convexity on the skin side surface, which may damage the fit.

[0138] Figure 8 1 is a schematic plan view of a portion of the urine absorbent pad 1 in a developed and stretched state when viewed from the skin side.

[0139] exist Figure 8 In the absorbent body 10, the length in the longitudinal direction from the inner end 60ie in the longitudinal direction of the deformation guide region 60 to the outer end 60se in the longitudinal direction of the deformation guide region 60 is defined as a first length N, a position from the outer end 60se in the longitudinal direction of the deformation guide region 60 to the outer side in the longitudinal direction by the first length N is defined as a reference position KP, and a region extending from the inner end 60ie in the longitudinal direction of the deformation guide region 60 to the reference position KP in the longitudinal direction is defined as a designated region X. Here, for a pair of liquid diffusion guides 70 and 70 provided in the absorbent body 10, preferably, the inner ends 70ie and 70ie in the longitudinal direction of the pair of liquid diffusion guides 70 are both located within the above-mentioned designated region X. In the case where the inner ends 70ie and 70ie in the longitudinal direction of the pair of liquid diffusion guides 70 and 70 are located in the designated area X, urine accumulated around the valleys of the formed protrusions R (near the outer sides in the longitudinal direction of the pair of deformation guide regions 60) is more easily guided to the front and rear of the absorbent body 10, compared to the case where the inner ends 70ie and 70ie in the longitudinal direction of the pair of liquid diffusion guides 70 and 70 are not located in the designated area X. This allows efficient absorption by using the entire absorbent body 10.

[0140] In addition, back to Figure 3In the present embodiment, in the pair of deformation guide regions 60 and 60, the ends 60se and 60se in the longitudinal direction in the central regions 60ct and 60ct are spaced apart in the width direction. With this configuration, urine absorbed by the central portion in the longitudinal and width directions of the absorber 10 can be guided from the separation region between the pair of deformation guide regions 60 and 60 to the front and rear sides in the longitudinal direction and spread over the absorber 10. As a result, liquid (urine) can be prevented from accumulating in the valley of the convex portion R due to the deformation of the absorber 10, and this can promote effective absorption by using the entire absorber 10.

[0141] In addition, in the present embodiment, the ends 60se and 60se in the longitudinal direction of the deformation guide regions in the central regions 60ct and 60ct of the pair of deformation guide regions 60 and 60 are separated from each other in the width direction. However, the present invention is not limited to this, and the ends 60se and 60se in the longitudinal direction of the central regions 60ct and 60ct may be connected without being separated. For example, the pair of deformation guide regions 60 and 60 may be so-called V-shaped or arc-shaped. Even in the case where the ends 60se and 60se in the longitudinal direction of the central regions 60ct and 60ct are connected, the end in the longitudinal direction of the absorbent body 10 for convex deformation may be defined.

[0142] Moreover, if Figure 3 , Figure 4 A and Figure 4 As shown in FIG. 2B , the urine absorbent pad 1 of this embodiment has a design visible from the skin side of the urine absorbent pad 1 at least in the center in the longitudinal direction and the width direction. The design is applied to the design sheet 33ds, and the design sheet 33ds is placed between the front sheet 30 and the first absorbent body 11. The design sheet 33ds of this embodiment has a design such as Figure 3 By applying this design to the central part of the urine absorbent pad 1, the central part is visually emphasized when in use. The position where this design is applied is the part that protrudes toward the skin side when in use, and by emphasizing the area that will become the raised part (R), the user can be given the impression that the fit is good and the anti-leakage safety is improved.

[0143] ===Second Embodiment===

[0144] A pant-shaped disposable diaper 200 (hereinafter also referred to as "diaper 200") is described below by way of example of an absorbent article according to a second embodiment of the present invention.

[0145] <Basic Structure of Diaper 200>

[0146] Fig. 9 2 is a schematic perspective view of a diaper 200 according to the second embodiment. Fig.10is a plan view of the diaper 200 in an unfolded and stretched state. Fig.11 It is along Fig.10 Schematic cross-sectional view taken along line CC in FIG. 2. In addition, the "extended state" of the diaper 200 is the same as the extended state described in the first embodiment.

[0147] The diaper 200 is a disposable diaper having a pant shape in its natural state and Fig. 9 In the panty-shaped state, the diaper 200 has a "up-down direction", "left-right direction" and "front-back direction" that intersect each other, as well as a waist opening BH and a pair of leg openings LH and LH. The upper side in the up-down direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. In addition, the front side in the front-back direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's back side. In addition, in Fig.10 In the unfolded state, the diaper 200 has a “longitudinal direction” and a “width direction” that intersect each other. Fig.10 The vertical direction in the expanded state is Fig. 9 The vertical direction in the underpants-shaped state is consistent with the vertical direction in the underpants-shaped state. In addition, the width direction in the unfolded state is consistent with the left-right direction in the underpants-shaped state. Fig.11 As shown, the direction in which materials constituting the diaper 200 are stacked on each other is called the "thickness direction." Similar to the first embodiment, regarding the thickness direction, the side in contact with the wearer's skin is also called the "skin side," and the opposite side is called the non-skin side.

[0148] The diaper 200 includes an absorbent body 210 (hereinafter also referred to as “absorber 210 ”) and a waist member 220 disposed on the non-skin side of the absorbent body 210 . The waist member 220 is an exterior member and constitutes the exterior of the diaper 200 .

[0149] In Fig.10 The absorbent body 210 and the waist member 220 in the unfolded state are folded in half at a folding position, which is the central position CL in the longitudinal direction. In this folded state, the front part of the waist member 220 and the rear part of the waist member 220 facing each other are joined and connected to each other on both sides in the width direction (left-right direction), thereby forming a pair of side joints 220s and 220s. That is, the front part of the waist member 220 and the rear part of the waist member 220 are formed into an annular shape by a pair of side joints 220s and 220s. In addition, the side joints 220s are formed by a known joining method such as welding or bonding. This allows the diaper 200 to be in a state such as Fig. 9 The panty-shaped state shown is formed with a waist opening BH and a pair of leg openings LH and LH.

[0150] In this embodiment, if Fig.10As shown, a portion of the waist member 220 that overlaps with the side joint portion 220s on the front side in the longitudinal direction is referred to as a "front waist portion 230".

[0151] The front waist portion 230 is a portion located on the ventral side of the wearer when the diaper 200 is worn. Similarly, the portion of the waist member 220 that overlaps with the side joint 220s on the rear side in the longitudinal direction is referred to as the "rear waist portion 240". The rear waist portion 240 is a portion located on the back side (buttocks side) of the wearer when the diaper 200 is worn. In addition, the portion located between the front waist portion 230 and the rear waist portion 240 in the longitudinal direction is referred to as the "crotch CA".

[0152] The crotch portion CA is a portion located between the legs of the wearer when the diaper 200 is worn.

[0153] (Absorbent body (absorber) 210)

[0154] Fig.12 A is a plan view of the absorbent body 210, Fig.12 B is along Fig.12 A schematic cross-sectional view taken along line DD in FIG. The absorbent body 210 includes: an absorbent core 213 that absorbs excrement; a front sheet 216 disposed on the skin side in the thickness direction relative to the absorbent core 213; and a back sheet 217 disposed on the non-skin side relative to the absorbent core 213. However, the absorbent body 210 may also have another sheet member. For example, a second sheet (not shown) may be provided between the front sheet 216 and the absorbent core 213 in the thickness direction.

[0155] The materials of the absorbent core 213, the front sheet 216 and the back sheet 217 are respectively substantially the same as the materials of the absorbent core (the first absorbent core 13, the second absorbent core 23), the front sheet 30 and the back sheet 40 in the urine absorbent pad 1 of the first embodiment. The absorbent core 213 is covered by a core wrapping sheet 215 composed of, for example, tissue paper, so as to suppress the collapse of the core 213 and maintain its shape. The absorbent core 213 of this embodiment has a contraction portion 213c between the two ends in the longitudinal direction, and the width in the width direction in the contraction portion 213c is narrower than that in the two ends in the longitudinal direction. The contraction portion 213c has the narrowest part in the width direction in the central portion in the longitudinal direction of the core 213. The absorbent core 213 also has a central deformation guide portion 10S' similar to the urine absorbent pad 1 of the first embodiment, and a pair of deformation guide areas 60' and 60'.

[0156] In this embodiment, in the front sheet 216, the two side portions in the width direction (left-right direction) are folded back toward the non-skin side to wrap the absorbent core 213, such as Fig.12B. In addition, a pair of leakage-proof wall portions 252 extending in the longitudinal direction are provided on both sides of the absorbent body 210 in the width direction. In this embodiment, the leakage-proof wall portions 252 are each formed by a leakage-proof wall sheet 250 ( Fig.12 B) is formed. A leakage-proof wall elastic member 255 (corresponding to a stretchable member) such as an elastic thread that can shrink in the longitudinal direction is attached to the skin-side end of the leakage-proof wall portion 252 while being fixed in a state of being stretched in the longitudinal direction. When the diaper 200 is worn, the leakage-proof wall portion 252 stands up toward the skin side of the wearer due to the stretchability exhibited by the leakage-proof wall elastic member 255, and fits the crotch area of ​​the wearer.

[0157] (Waist member 220)

[0158] The waist member 220 has a skin side sheet 221 arranged on the skin side in the thickness direction, and a non-skin side sheet 232 (front side) and a non-skin side sheet 242 (back side) overlapped adjacent to the non-skin side of the skin side sheet 221, as shown in FIG. Fig.11 shown.

[0159] The front waist part 230 has a skin side sheet 221, a non-skin side sheet 232 and a waist elastic member 235 arranged between the two sheets in the thickness direction. The skin side sheet 221 is a sheet member continuous from the front waist part 230 to the back waist part 240 of the diaper 220, and is made of, for example, SMS non-woven fabrics, etc. The non-skin side sheet 232 is a sheet member superimposed on the non-skin side of the skin side sheet 221, and is made of, for example, SMS non-woven fabrics, etc. The upper end portion (the front end portion in the front-to-back direction) of the non-skin side sheet 232 is folded back from the non-skin side to the skin side, and from the front side to the back side in the front-to-back direction to form a folding portion 232f. However, it is not necessary to set the folding portion 232f.

[0160] The waist elastic member 235 is made of elastic thread, etc., and is placed side by side with a gap in the up-down direction between the skin side sheet 221 and the non-skin side sheet 232, and is attached in a state stretched in the width direction. The elasticity exhibited by the waist elastic member 235 allows the front waist portion 230 to fit around the front waist of the wearer.

[0161] The waist elastic member 235 can be attached by an adhesive such as a hot melt adhesive, etc. For example, the waist elastic member 235 can be attached as follows: a hot melt adhesive is continuously or intermittently applied along the waist elastic member 235, and the waist elastic member 235 is stretched at a certain stretch ratio and then sandwiched between the skin side sheet 221 and the non-skin side sheet 232.

[0162] In the waist member 220, the rear waist portion 240 has substantially the same structure as the front waist portion 230. That is, the rear waist portion 420 has a skin side sheet 221 arranged on the skin side in the thickness direction, a non-skin side sheet 242 superimposed on the non-skin side of the skin side sheet 221, and a waist elastic member 245 provided between the skin side sheet 221 and the non-skin side sheet 242 in the thickness direction.

[0163] The appearance shape of the waist member 220 is partially different between the front side and the rear side in the front-to-back direction. Fig.10 As shown, a buttocks cover 246 having a substantially trapezoidal shape is provided in an area (crotch CA) on the lower side in the up-down direction of the side joint 220s of the rear waist portion 240. The buttocks cover 246 is formed by being superimposed on the skin side sheet 221 of the rear waist portion 240 from the non-skin side, and the width in the lateral direction of the buttocks cover 246 narrows from the upper side toward the lower side in the up-down direction. By providing the buttocks cover 246, when the diaper 200 is worn, the waist member 220 can widely cover the buttocks of the wearer.

[0164] In the buttocks cover 246, as Fig.10 and Fig.11 As shown, a leg elastic member 247 (e.g., elastic thread) is provided. The leg elastic members 247 are each attached between the skin side sheet 221 and the buttocks cover 246 in a state of being stretched along the outer edge portion of the buttocks cover 246 (i.e., a portion of the peripheral edge portion of the leg opening LH). The elasticity exhibited by the leg elastic members 247 makes it easier for the buttocks cover 246 to fit around the buttocks of the wearer when the diaper 200 is worn, and also makes it less likely that the buttocks cover 246 will roll up from the buttocks.

[0165] (Front deformation guide 280)

[0166] In a second embodiment, if Fig.12 As shown in FIG. 2A , front deformation guides 280 are provided in pairs in the width direction at the front side relative to the central position (CL) in the longitudinal direction, and the front deformation guides 280 are used to guide the deformation of the absorbent core 213 in the thickness direction. The front deformation guides 280 are all low basis weight parts having a lower basis weight than other areas of the absorbent core 213. When the diaper 200 is worn, the front deformation guides 280 become the starting point of folding and guide the deformation of the absorbent core 213 in the thickness direction.

[0167] Note that the front deformation guide 280 is not limited to the above-mentioned low basis weight portion, and may be a slit where the basis weight of the absorbent core 213 is zero, or a high rigidity portion where the absorbent core 213 has high rigidity. In addition, a configuration in which the absorbent core 213 has a fold in a certain portion so that it is easy to cause bending deformation or other configurations is also acceptable.

[0168] Fig.13 2 is an enlarged view of a portion of the absorbent body 210, showing the configuration of the front deformation guide 280. In the diaper 200, each of the pair of front deformation guides 280 has a front inclined portion 280a that is inclined from the front side to the rear side in the front-to-rear direction (longitudinal direction) and from the outer side to the inner side in the width direction. The front deformation guide 280 of this embodiment is inclined from the front side to the rear side in the front-to-rear direction (longitudinal direction) and from the outer side to the inner side in the width direction as a whole, that is, the front deformation guide 280 is the front inclined portion 280a as a whole.

[0169] In addition, the starting point of the inclination of the front deformation guide 280 is the inclination starting point 280as, and the end point of the inclination located at the rear side relative to the inclination starting point 280as is the inclination end point 280ae. The front inclination portion 280a may be formed in a straight line between the inclination starting point 280as and the inclination end point 280ae, or may be formed in a curved manner. In addition, the front deformation guide 280 may have a straight line portion extending in the front-rear direction, or a part of the front deformation guide 280 may have a discontinuous portion.

[0170] When the user of the diaper 200 wears the diaper 200, the front deformation guide 280 is positioned to extend along the wearer's groin, and when sitting or standing, the portion of the absorbent core 213 outside the front deformation guide 280 can be deformed according to the movement of the wearer's legs so that the portion is located above (on the skin surface side) the portion of the absorbent core 213 inside the front deformation guide 280. This allows the absorbent core 213 to be in close contact with the gap of the groin where leakage is prone to occur, thereby suppressing leakage.

[0171] In addition, if Fig.13 As shown, in one front inclined portion of a pair of front inclined portions 280a (the one on the right side in this example), when viewed in the thickness direction (so-called in a plan view), a straight line connecting the inclination start point 280as and the inclination end point 280ae, or an extension line ET280 of the straight line intersects with one of the pair of deformation guide areas 60' and 60'. With this configuration, the deformation guide force applied to the front inclined portion 280a is easily transmitted to the deformation guide area 60', making it easier for the absorbent body (absorber) 210 to deform into a convex shape starting from the deformation guide area 60' toward the skin surface side. This makes it easier to bring the absorbent body (absorber) 210 into close contact.

[0172] Moreover, if Fig.12As shown in FIG. 1A, there is a portion where the front deformation guide 280 and the contraction portion of the absorbent core 213 overlap with respect to the longitudinal direction. The contraction portion 213c is a portion that is easy to contact with the wearer's legs. By arranging the front deformation guide 280 along the contraction portion 213c, it is easy to deform the portion of the absorbent core 213 on the outside of the front deformation guide 280 so that the portion is located above the portion of the absorbent core 213 on the inside of the front deformation guide 280 (on the skin surface side). With this structure, the absorbent core 213 is in close contact with the gap in the groin portion where leakage is prone to occur, so that leakage can be suppressed.

[0173] Similar to the first embodiment, in the second embodiment, when the diaper 200 is worn, the absorbent body 210 of the diaper 200 is deformed so that it bulges toward the skin side starting from the central deformation guide 10' and the pair of deformation guide areas 60' and 60'. Specifically, when the diaper 200 is put on, both sides of the absorbent body 210 in the width direction are pulled upward while contacting the legs of the wearer, so that the central deformation guide 10S' first contacts the crotch. At this time, the absorbent body 210 is deformed so that it bulges toward the skin side starting from the central deformation guide 10' and the pair of deformation guide areas 60' and 60'. In addition, the deformation guide areas 60' and 60' respectively arranged on one side (front side) and the other side (rear side) in the longitudinal direction define the end portion of the absorbent body 10 in the longitudinal direction that is deformed convexly toward the skin side. In other words, similar to the first embodiment, in the absorbent body 210, a large dome-shaped bulge (not shown) bulging toward the skin side in the central area corresponding to the crotch area is formed. Furthermore, by deforming from the convex portion and the front deformation guide 280 along the groin portion, the absorbent body 210 can be in close contact with the wearer's body along the shape over a wide area, making it less likely that a gap will be formed between the body and the diaper 200. As a result, leakage can be suppressed.

[0174] In addition, in the present embodiment, as in the first embodiment, it is desirable that no other contraction element that contracts in the longitudinal direction is provided inside the leak-proof wall elastic member 255 (retractable member). However, since there is no contraction element that contracts the central portion in the width direction, the contraction force has no direct effect on the central portion in the width direction of the absorbent body 210. This enables the central portion to maintain a large degree of freedom in deformation. Therefore, when the absorbent body 210 absorbs liquid such as urine and expands, the absorbent body 210 is more likely to deform.

[0175] Fig.14 FIG. 2 shows a modified example of the diaper 200. Fig.14As shown, the absorbent body (absorber) 210 also has a front central deformation guide portion 285 extending in the front-to-back direction (longitudinal direction) between a pair of front deformation guide portions 280 and 280 in the width direction, which serves as a deformation starting point. The front central deformation guide portion 285 may be composed, for example, of a compression groove formed by embossing. The front central deformation guide portion 285 is a region where the rigidity of the absorbent body (absorber) 210 changes due to such compression, and is the deformation starting point of the absorber 210. Note that the front central deformation guide portion 285 is not limited to the compression groove, and may be composed, for example, of a low basis weight portion having a basis weight (g / m2) lower than the basis weight of the liquid absorbent material in the region adjacent thereto from the outside in the width direction. 2 ). By deforming the portion of the absorbent body 210 on the outside of the front deformation guide 280 so that the portion is located above the portion of the absorbent body 210 on the inside of the front deformation guide 280 (on the skin surface side), and deforming the front central deformation guide 285 so that it bulges downward (non-skin surface side), a space can be formed on the front side while keeping the absorbent body 210 in close contact with the gap in the groin area where leakage is prone to occur. This space is used as a temporary storage space for urine, so that leakage in the groin area can be prevented.

[0176] ===Others===

[0177] The above embodiments of the present disclosure are provided only to facilitate understanding of the present disclosure and are not intended to be interpreted as limiting the present disclosure. The present disclosure may be changed or improved in various ways without departing from the spirit of the present disclosure, not to mention that the present disclosure includes its equivalents.

[0178] In the first embodiment, as an example of the absorbent article, the urine absorption pad 1 is described, but the present invention is not limited thereto. For example, the absorbent article may be a sanitary napkin that absorbs menstrual blood instead of urine.

[0179] In the first embodiment, the low basis weight portion 10S forming the central deformation guide portion 10S is provided in both the first absorbent body 11 and the second absorbent body 21, but the present invention is not limited thereto. The low basis weight portion 10S needs to be provided at least in the first absorbent body 11. By providing the low basis weight portion 10S in the first absorbent body 11 located on the skin side in the thickness direction relative to the second absorbent body 21, urine can be quickly diffused in the absorbent body 10, and the accumulation of liquid on the surface of the absorbent body 10 can be reduced, so that leakage can be suppressed.

[0180] In the second embodiment, the absorbent body (absorber) 210 has the front central deformation guide 285, but may also have a rear central deformation guide located outside (on the rear side) in the longitudinal direction relative to the deformation guide regions 60' and 60' located on the other side (on the rear side) in the longitudinal direction. This makes it possible to promote deformation of the absorbent core 213 along the thickness direction of the wearer's buttocks from the rear central deformation guide at the rear side in the longitudinal direction of the absorbent body 210.

[0181] Description of Reference Numerals

[0182] 1. Urine absorbent pad (absorbent article)

[0183] 1C Central

[0184] 10 Absorber

[0185] 10S central deformation guide (low basis weight section)

[0186] 10S' central deformation guide

[0187] 10Sea front end

[0188] 10Seb rear end

[0189] 11First absorber

[0190] 11cs part

[0191] 11S Central deformation guide

[0192] 12 Second absorber

[0193] 13. First absorbent core

[0194] 13c Contraction

[0195] 13cn contraction starting position

[0196] 13cp contraction start position

[0197] 15 core wrapping sheet

[0198] 21 Second absorber

[0199] 21S Central deformation guide

[0200] 23. Second absorbent core

[0201] 23c Contraction

[0202] 23cn contraction starting position

[0203] 23cp contraction starting position

[0204] 23ee end

[0205] 25 core wrapping sheet

[0206] 30 front piece

[0207] 30e2 end

[0208] 30ee2 edge

[0209] 33ds exterior design film

[0210] 40 back sheet

[0211] 40e2 end

[0212] 40ee2 edge

[0213] 50 side panels

[0214] 50b base (fixed part)

[0215] 50f free end

[0216] 50fa front end

[0217] 50fb rear end

[0218] 52 leak-proof wall

[0219] 55 Leakage-proof wall elastic component (retractable component)

[0220] 57 Non-skin side stretchable member (stretchable member)

[0221] 60 deformation guide area

[0222] 60' deformation guide area

[0223] 60ct Central Area

[0224] 60et end region

[0225] 60ie inner end in the longitudinal direction

[0226] 60se Outer end in the longitudinal direction

[0227] 70 Liquid diffusion guide

[0228] 70ie inner end in the longitudinal direction

[0229] 81 Male member of hook and loop fastener

[0230] 101 Diapers (Disposable Diapers)

[0231] 101a Predecessor

[0232] 101ae2 end

[0233] 101b back body

[0234] 101be2 terminal

[0235] 101m Center part in the longitudinal direction (crotch part)

[0236] 110 Absorber

[0237] 130 Frontal

[0238] 140 Back sheet

[0239] 200 Panty-Shaped Disposable Diapers

[0240] 210 Absorbent body (absorbent body 210)

[0241] 220 Waist Component

[0242] 220s side joint

[0243] 230 front waist

[0244] 240 Back waist

[0245] 213 Absorbent core

[0246] 216 Frontal

[0247] 217 Back sheet

[0248] 215 core wrapping sheet

[0249] 213c Contraction

[0250] 221 Skin side piece

[0251] 232 Non-skin side panels

[0252] 235 Elastic waist member

[0253] 232f Turnaround

[0254] 242 Non-skin side panels

[0255] 245 Waist elastic member

[0256] 246 Hip Cover

[0257] 247 Leg elastic member

[0258] 250 Leak-proof wall sheet

[0259] 252 Leak-proof wall

[0260] 255 leak-proof wall elastic component (retractable component)

[0261] 280 Front deformation guide

[0262] 280a Front tilt

[0263] 280as incline start

[0264] 280ae tilt end

[0265] 285 Front center deformation guide

[0266] BH waist opening

[0267] CA Crotch

[0268] LH Leg Opening

[0269] ET280 extension cable

Claims

1. An absorbent article having a longitudinal direction, a width direction and a thickness direction which are perpendicular to each other in an unfolded state, The absorbent article comprises: Liquid-absorbent absorbent, The absorbent body has a central deformation guide portion in the central part in both the longitudinal direction and the width direction, which extends in the longitudinal direction and serves as a deformation starting point. The absorbent body has a pair of deformation guide regions provided to be inclined at an angle from the end sides in the width direction toward the center side in the width direction, In the deformation guide region, an end region located on the end side in the width direction of the absorbent body is located on the inner side in the longitudinal direction of a central region located on the central side in the width direction of the absorbent body, The deformation guiding region is configured not to overlap with a center line in the longitudinal direction of the absorbent article; and A stretchable member that stretches and contracts in the longitudinal direction is provided at both end portions of the absorbent article in the width direction and in at least a central portion of the absorbent article in the longitudinal direction.

2. The absorbent article according to claim 1, wherein The absorbent body has an absorbent core, The absorbent core has a constricted portion between both ends in the longitudinal direction, The constricted portion has a width in the width direction that is narrower than that in the both end portions in the longitudinal direction, and The absorbent article has at least a portion of the deformation guiding region and a portion of the contraction portion overlapping with respect to the longitudinal direction.

3. The absorbent article according to claim 2, wherein: The central region in the deformation guide region is provided in a region in the longitudinal direction where the constriction portion exists.

4. The absorbent article according to claim 1 or 2, wherein: At least one end portion of the central deformation guiding portion in the longitudinal direction has a portion overlapping the deformation guiding region with respect to the longitudinal direction.

5. The absorbent article according to claim 1 or 2, wherein: An end portion of the central deformation guiding portion in the longitudinal direction is located inward in the longitudinal direction of an outer end of the central region of the deformation guiding region in the longitudinal direction.

6. The absorbent article according to claim 1 or 2, wherein: The end region in the deformation guide region is provided in a region in the longitudinal direction where the retractable member exists.

7. The absorbent article according to claim 1 or 2, wherein: A pair of leakage-proof walls are provided on both sides of the absorbent body in the width direction. The retractable member is a leak-proof wall elastic member that can be contracted in the longitudinal direction, The leakage preventing wall elastic member is provided in the pair of leakage preventing wall portions, The leakage preventing wall elastic member is fixed in a state of being stretched in the longitudinal direction, and In a state where the absorbent article is folded in half so that the skin-side surface of the absorbent article faces outward, and then unfolded again and placed on a horizontal surface with the non-skin-side surface of the absorbent article facing downward, The height from the horizontal plane to the highest point where the elastic member of the leakage preventing wall has the highest height Lower than The height from the horizontal plane to the highest point where the absorbent body has the highest height.

8. The absorbent article according to claim 1 or 2, wherein: No other contraction element that contracts along the longitudinal direction is provided on the inner side of the telescopic member in the width direction.

9. The absorbent article according to claim 1 or 2, wherein: The central deformation guiding portion is constituted by a low basis weight portion having a basis weight lower than a basis weight of a region adjacent thereto from an outer side in the width direction.

10. The absorbent article according to claim 9, wherein The absorbent body has a first absorbent body, and a second absorbent body located on the non-skin side in the thickness direction relative to the first absorbent body, and The low basis weight portion is provided at least in the first absorbent body.

11. The absorbent article according to claim 1 or 2, wherein: The absorbent body has a pair of liquid diffusion guides on one side and the other side in the longitudinal direction, The liquid diffusion guide extends along the longitudinal direction and is located on both sides in the width direction, and Taking the length in the longitudinal direction from the inner end of the deformation guiding region in the longitudinal direction to the outer end of the deformation guiding region in the longitudinal direction as the first length, a position which is the first length from the outer end of the deformation guide region in the longitudinal direction to the outer side in the longitudinal direction as a reference position, and Taking a region extending in the longitudinal direction from the inner end of the deformation guide region in the longitudinal direction to the reference position as a designated region, Inner ends of the pair of liquid diffusion guides in the longitudinal direction are both located within the designated area.

12. The absorbent article according to claim 1 or 2, wherein: Ends of the pair of deformation guide regions in the longitudinal direction in the central region are spaced apart in the width direction.

13. The absorbent article according to claim 1 or 2, wherein: The pair of deformation guide areas are provided on one side and the other side in the longitudinal direction.

14. The absorbent article according to claim 1 or 2, wherein: The absorbent article has a design visible from the skin side of the absorbent article at least in the center in the longitudinal direction and the width direction.

15. The absorbent article according to claim 1, wherein In the unfolded and extended state, The stretchable member is a non-skin-side stretchable member that is disposed on the non-skin side in the thickness direction with respect to the skin-side surface of the absorbent body.

16. The absorbent article according to claim 15, wherein The absorbent body has an absorbent core, The absorbent core has a constricted portion between both ends in the longitudinal direction, The contraction portion has a width in the width direction that is narrower than that of the two end portions in the longitudinal direction, The length of the contraction portion in the longitudinal direction is longer than the length of the non-skin-side stretchable member in the longitudinal direction, and In the longitudinal direction, the non-skin-side stretchable member is provided in a region where the constriction portion is provided.

17. The absorbent article according to claim 16, wherein An outer end of the non-skin-side stretchable member in the width direction does not overlap with the absorbent core in a plan view.

18. The absorbent article according to claim 1 or 2, wherein: The absorbent body has an absorbent core, When the longitudinal direction is the front-to-back direction, The front side in the front-back direction corresponds to the belly side of the wearer, and The rear side in the front-to-back direction corresponds to the back side of the wearer, The front deformation guides are provided in pairs in the width direction at the front side relative to the central position in the front-rear direction, The front deformation guide portion guides the absorbent core to deform in the thickness direction, and The pair of front deformation guide portions each has a front inclined portion that is inclined from the front side to the rear side in the front-rear direction and from the outer side to the inner side in the width direction.

19. The absorbent article according to claim 18, wherein Each of the pair of front deformation guides has an inclination start point and an inclination end point, The inclination starting point is the point where the inclination of the front deformation guide portion starts. The inclination end point is a point located at the rear side relative to the inclination start point and where the inclination of the front deformation guide portion ends. Regarding one front inclined portion of the pair of front inclined portions, When viewed in the thickness direction, any one of a straight line connecting the inclination start point and the inclination end point of the one-side front inclination portion and an extension line of the straight line intersects one of the pair of deformation guide regions.

20. The absorbent article according to claim 18 or 19, wherein The absorbent body has an absorbent core, The absorbent core has a constricted portion between both ends in the longitudinal direction, The constricted portion has a width in the width direction that is narrower than that in the both end portions in the longitudinal direction, and The absorbent article has a portion where the front deformation guide and the constriction overlap with respect to the longitudinal direction.

21. The absorbent article according to claim 18 or 19, wherein The absorbent body has a front central deformation guide portion that is located between the pair of front deformation guide portions in the width direction, extends in the front-rear direction, and serves as a deformation starting point.

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