JP6424185B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article having a skin sheet provided with convex portions and concave portions.

  An absorbent article having a skin sheet provided with a convex portion and a concave portion is provided. The convex part and recessed part of the skin sheet of patent document 1 are arrange | positioned so that the skin opposing surface side of an absorber may be covered (for example, refer FIG.2 and FIG.3 of patent document 1).

JP 2009-148445 A

  When such an absorbent article is worn, the body pressure of the wearer is applied to the absorbent article, and the absorbent article is pressed from the skin facing surface side toward the non-skin facing surface side. When the absorbent article is pressed from the skin facing surface side toward the non-skin facing surface side, the convex portion and the concave portion of the skin surface sheet may be crushed. In particular, the center in the width direction of the skin sheet is disposed so as to face the excretion opening of the wearer, and a lot of body fluid is discharged. If the convex portion and the concave portion are crushed at the center in the width direction of the skin sheet, it becomes difficult to diffuse air in the front-rear direction along the convex portion and the concave portion, and it is difficult to improve air permeability.

  This indication is made in view of the above-mentioned subject, and aims at improving breathability in an absorptive article which has a skin sheet provided with a convex part and a crevice.

  The absorbent article (disposable diaper 10) which concerns on this indication is the absorber (absorber 40) which has the front-back direction (front-back direction L), the width direction (width direction W) orthogonal to the said front-back direction, and an absorbent material. A skin surface sheet (top sheet 50) positioned on the skin-facing surface side of the absorber, and the skin surface sheet is closer to the non-skin facing surface side than the convex portion (convex portion 52) and the convex portion. An absorbent article having a recessed portion (recessed portion 51), wherein the absorbent body has a groove portion (groove portion 46) that is recessed closer to the non-skin facing surface than the surrounding absorbent body at the center in the width direction of the absorbent body. The convex portion and the concave portion are disposed in a region extending in the front-rear direction and overlapping the groove portion, the groove portion extends in the front-rear direction, and extends from the front edge of the absorber to the absorber. The gist is that it is provided continuously to the rear edge.

  According to this indication, breathability can be improved in an absorptive article which has a skin sheet provided with a convex part and a crevice.

It is a top view of the disposable diaper in one embodiment. It is sectional drawing of the disposable diaper along the AA line shown in FIG. FIG. 3 is an enlarged cross-sectional view schematically showing a portion B in FIG. 2. It is the perspective view which showed the top sheet and the absorber typically. It is a top view of the absorber of a deployment state. It is sectional drawing of the absorber along CC line | wire of FIG. It is the figure which showed typically the top sheet and absorber in the cross section shown in FIG. Fig.7 (a) has shown the state before wear, FIG.7 (b) has shown the state after wear. It is sectional drawing which showed typically the wearing condition of the disposable diaper shown in FIG. It is sectional drawing which showed typically the wearing condition of the disposable diaper in the modification 1. FIG. It is a figure which shows the top sheet which concerns on the modification 2. 10A is a perspective view, FIG. 10B is a cross-sectional view in an expanded state, and FIG. 10C is a cross-sectional view in a natural state.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

Forward and backward,
A width direction orthogonal to the front-rear direction;
An absorber having an absorbent material;
A skin sheet positioned on the skin-facing surface side of the absorber, and
The skin sheet is an absorbent article having a convex part and a concave part recessed on the non-skin facing surface side than the convex part,
The absorbent body has a groove portion that is recessed toward the non-skin facing surface side than the surrounding absorbent body at the center in the width direction of the absorbent body.
The convex portion and the concave portion are arranged in a region extending in the front-rear direction and overlapping the groove portion,
The said groove part is an absorbent article extended in the said front-back direction and provided continuously from the front-end edge of the said absorber to the rear-end edge of the said absorber.

  When the wearer's body pressure is applied to the absorbent article during wearing, the absorbent article is pressed from the skin facing surface side toward the non-skin facing surface side. At this time, since the groove part located in the center of the width direction of the absorber is recessed to the non-skin facing surface side, the skin sheet in the area overlapping the groove part is compared with the skin sheet in the area overlapping the periphery of the groove part, Difficult to receive body pressure. Therefore, the convex part and the concave part provided in the surface sheet in the region overlapping with the groove part are not easily crushed, and the shape is easily maintained. Air can be passed in the front-rear direction by the convex part and the concave part provided in the skin sheet extending in the front-rear direction, thereby improving air permeability.

  Since the groove is continuously provided from the front edge of the absorber to the rear edge of the absorber, and the convex and concave portions are arranged in the region overlapping with the groove, it is continuous from the front edge of the absorber to the rear edge. The shape of the convex portion and the concave portion can be maintained in the space that is extended, and the air permeability improvement effect by the convex portion and the concave portion can be exhibited.

  By improving the air permeability, it is possible to suppress the stuffiness, reduce the wetness of the part touching the skin, and improve the wearing feeling. Moreover, skin troubles caused by stuffiness can be suppressed by improving air permeability.

Such an absorbent article,
It is desirable that the convex portion and the concave portion continuously overlap from the front end edge of the groove portion to the rear end edge of the groove portion.

  According to such an absorbent article, since the convex portion and the concave portion continuously overlap from the front end edge of the groove portion to the rear end edge of the groove portion, in the space continuously extending from the front end edge to the rear end edge of the absorber. Air can be continuously diffused along the convex and concave portions. It becomes easier to guide the air between the absorber and the wearer to the outside in the front-rear direction than the absorber. By guiding the air in the region where the absorber is disposed to the outside in the front-rear direction than the absorber, the air permeability can be further improved, and the stuffiness due to the body fluid absorbed by the absorber can be effectively reduced.

Such an absorbent article,
The length of the groove in the thickness direction is preferably longer than the length of the protrusion in the thickness direction.

  According to such an absorbent article, since the length in the thickness direction of the groove is longer than the length in the thickness direction of the protrusion, the protrusion and the recess are disposed in the region where the groove is provided in the thickness direction. Is done. The body pressure applied to the absorbent article is applied to the convex portion and the concave portion that overlap the region other than the groove portion, and then to the convex portion and the concave portion that are arranged to overlap the groove portion. Therefore, the body pressure applied to the convex portion and the concave portion arranged so as to overlap the groove portion is reduced, and the shape of the convex portion and the concave portion arranged so as to overlap the groove portion can be easily maintained. Therefore, the effect of allowing air to pass in the front-rear direction and improving the air permeability can be further exhibited.

Such an absorbent article,
It is desirable that the convex portion and the concave portion extend in the front-rear direction across the front end edge of the absorber and the rear end edge of the absorber.

  According to such an absorbent article, the region adjacent to the front end edge of the absorbent body in front of the front end edge of the absorbent body is recessed on the non-skin facing surface side by the thickness of the absorbent body, and body pressure is applied. hard. Similarly, the region adjacent to the rear end edge of the absorber on the rear side of the rear end edge of the absorber is recessed toward the non-skin facing surface side by the thickness of the absorber, and it is difficult for body pressure to be applied. The shape of the convex part and concave part arrange | positioned in the area | region where the said body pressure cannot be easily applied is easy to be maintained. Therefore, the effect of allowing air to pass in the front-rear direction and improving the air permeability can be further exhibited.

Such an absorbent article,
The absorber has a pair of first and second fold lines extending in the front-rear direction,
In the folded state in which the absorber is folded,
A first region located between the pair of first fold lines and including a center in the width direction of the absorber;
A pair of first folds positioned between the second fold line and the first fold line located on the inner side in the width direction than the first fold line and disposed on the skin facing surface side of the first region, respectively. Two areas,
A pair of third regions respectively disposed on the skin facing surface side of the second region outside the second fold line in the width direction;
The pair of second fold lines are separated in the width direction,
The groove is preferably provided between a pair of overlapping portions in which the first region, the second region, and the third region overlap.

  According to such an absorbent article, the overlapping portion in which the first region, the second region, and the third region are stacked is disposed outside the groove portion in the width direction. The absorbent body positioned on the non-skin facing surface side of the groove portion is configured by only the first region, and the overlapping portion is formed by stacking the first region, the second region, and the third region. The length in the thickness direction of the overlapping portion is longer than the length in the thickness direction of the absorber located on the non-skin facing surface side of the groove portion. Since the absorber located on the outer side in the width direction is thicker than the groove part, it becomes easier to maintain the shape of the convex part and the concave part provided in the region overlapping the groove part, and the air permeability by the convex part and the concave part is further improved. it can.

Such an absorbent article,
The inner edge of the overlapping portion has a wall portion extending toward the non-skin facing surface side,
It is desirable that the convex part and the concave part are arranged in a region covering the wall part.

  According to such an absorbent article, the wall portion extends toward the non-skin facing surface side, and it is difficult for body pressure to be applied as compared with the region extending in the planar direction. The convex part and the concave part arranged in the region covering the wall part are not easily crushed by body pressure or the like, and the shape is easily maintained. By easily maintaining the shape of the convex part and the concave part, the air permeability of the body fluid by the convex part and the concave part can be further improved.

Such an absorbent article,
The outer edge of the third region is disposed outside the first fold line in the width direction,
In the folded state,
A first joint where the skin facing surface of the first region and the non-skin facing surface of the second region are joined;
It is desirable to have a second non-joining portion in which the skin facing surface of the second region and the non-skin facing surface of the third region are not joined.

  According to such an absorbent article, when the absorbent article is attached to the wearer, the absorbent article is sandwiched between both legs of the wearer. A force is applied to the absorbent article from the outer side in the width direction toward the inner side in the width direction. Since the outer edge of the third region is positioned on the outer side in the width direction with respect to the first folding line, the force from the outer side in the width direction toward the inner side in the width direction is applied to the outer edge of the third region. The third region absorbs a force from the outer side in the width direction toward the inner side in the width direction by being deformed. Therefore, it is possible to prevent the first region from being deformed by the force. It becomes easy to maintain the shape of the groove part located in the skin opposing surface side of the first region and the shape of the convex part and the concave part arranged in the groove part.

  In addition, since the first region and the second region are joined, and the skin facing surface of the second region and the non-skin facing surface of the third region are not joined, a force directed from the outside in the width direction to the inside in the width direction is generated. When it starts, it deform | transforms so that the 3rd area | region on either side may rise to a wearer side on the basis of the 2nd area | region joined to the 1st area | region. The height of the overlapping portion located on the outer side in the width direction becomes higher than the groove portion, and the length of the groove portion in the thickness direction becomes longer. It is difficult for body pressure to be applied by the convex portions and the concave portions arranged in the groove portions, and the air permeability improvement effect by the convex portions and the concave portions can be further exhibited.

Such an absorbent article,
A third joining portion in which the third region and the non-skin sheet are joined;
A third non-joining portion that is located on the inner side in the width direction than the third joint portion and on the outer side in the width direction with respect to the first fold line, and in which the third region and the non-skin surface sheet are not joined; It is desirable to have

  According to such an absorptive article, the 3rd field and a non-skin sheet are joined by the 3rd joined part, and are not joined by the 3rd non joined part. Therefore, when a force from the outer side in the width direction toward the inner side in the width direction is applied, the region on the inner side in the width direction with respect to the third joint portion is deformed so as to rise toward the wearer side from the third joint portion. Thereby, the height of the overlapping portion becomes higher and the length of the groove portion in the thickness direction becomes longer. It is difficult for body pressure to be applied by the convex portions and the concave portions arranged in the groove portions, and the air permeability improvement effect by the convex portions and the concave portions can be further exhibited.

Such an absorbent article,
It is desirable to have the 4th non-joining part where the 1st field and the non-skin sheet are not joined in the field which goes to the inner side of the width direction from the outside edge of the 1st field.

  According to such an absorbent article, when a force is applied from the outside in the width direction to the inside in the width direction, and the left and right third regions are deformed so as to rise to the wearer side, the outer edges of the first region also It becomes easy to deform so as to rise to the wearer side. Therefore, the height of the overlapping portion becomes higher, and the length of the groove portion in the thickness direction becomes longer. It is difficult for body pressure to be applied by the convex portions and the concave portions arranged in the groove portions, and the air permeability improvement effect by the convex portions and the concave portions can be further exhibited.

=== About the absorbent article which concerns on this Embodiment ===
Next, an embodiment of a disposable diaper as an absorbent article according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

(1) Whole schematic structure of disposable diaper FIG. 1: is a top view of the unfolded state of the disposable diaper 10 which concerns on this embodiment. FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along the line AA shown in FIG. The plan view shown in FIG. 1 is a diagram in a state where the leg stretchable portion 75 and the elastic member 77 of the three-dimensional gather are extended until the top sheet 50 and the side sheets 70 constituting the disposable diaper are not formed with a heel.

  The disposable diaper 10 has a front waistline region 20, a crotch region 25, and a rear waistline region 30. The front waistline region 20 is a portion in contact with the wearer's front waistline portion (abdomen portion). Moreover, the back waistline area 30 is a part which contacts a wearer's back waistline part (back part). The crotch region 25 is a region that is located between the front waistline region 20 and the rear waistline region 30 and is provided with a leg opening 35. The leg opening 35 is provided at the outer edge of the disposable diaper, and is a portion that is disposed around the leg of the wearer while the disposable diaper is worn by the wearer. The outer edge is an outer end in the width direction, and the inner edge is an inner end in the width direction.

  In this embodiment, the direction from the front waistline region 20 to the rear waistline region 30 is referred to as the front-rear direction L, the direction orthogonal to the front-rear direction L is referred to as the width direction W, and the skin facing surface side T1 of the wearer, The direction opposite to the skin facing surface side T1 and including the non-skin facing surface side T2 of the wearer is referred to as a thickness direction T.

  The disposable diaper 10 includes at least an absorber 40, a skin sheet disposed on the skin facing surface side T1 of the absorber 40, and a non-skin surface sheet positioned on the non-skin facing surface side T2 of the absorber 40. . The absorber 40 is disposed at least in the crotch region 25. As shown in FIG. 6, the absorber 40 has the absorption core 40a and the core wrap 40b. The absorbent core 40a can be made of a material similar to that of a conventional disposable diaper, includes an absorbent material such as pulverized pulp or a superabsorbent polymer (SAP), and can be appropriately formed using a known member or material.

  The core wrap 40b is a sheet that covers the absorbent core 40a that is an absorbent material. The core wrap 40b is composed of various fiber nonwoven fabrics or tissues having liquid permeability. The absorbent body 40 has a groove 46 that is recessed toward the non-skin facing surface side with respect to the surrounding absorbent body. The absorbent body located on the non-skin facing surface side of the groove portion 46 is a portion having a basis weight lower than that of the surrounding absorbent body, a portion having a thickness thinner than that of the surrounding absorbent body, a portion that has been squeezed than the surrounding absorbent body, etc. Consists of. Further, the weighing of the absorbent material in the groove 46 may be zero. The basis weight absorber 40 will be described in detail later.

  The skin sheet includes a top sheet 50 and a side sheet 70. The top sheet 50 is formed of a liquid permeable sheet such as a nonwoven fabric or a woven fabric. The top sheet 50 is a sheet that comes into contact with the skin of the wearer. The top sheet 50 has a concave part and a convex part. The top sheet will be described in detail later.

  The side sheet 70 covers the outer edge of the top sheet 50 and extends outward in the width direction from the top sheet 50. The inner edge of the side sheet 70 is folded outward in the width direction, and an elastic member 77 that expands and contracts in the front-rear direction is disposed between the two side sheets 70. The side sheet 70 and the elastic member 77 constitute a three-dimensional gather. A three-dimensional gather has the elastic member 77 which expands-contracts in the front-back direction, and is arrange | positioned by a pair on the both outer sides of the width direction rather than the center of the width direction of a disposable diaper.

  The non-skin surface sheet has at least a back sheet 60 a and an exterior sheet 60. The back sheet 60a has liquid impermeability and is disposed on the non-skin facing surface side T2 of the absorbent core 40a and the core wrap 40b. The exterior sheet 60 is disposed on the non-skin facing surface side T2 of the back sheet 60a.

  The side sheet 70 is provided with a fastening tape 90. The fastening tape 90 extends along the width direction W in the rear waistline region 30 and is fastened to the target portion 95 of the front waistline region 20 to hold the disposable diaper 10 on the wearer's body. The target portion 95 is configured such that the pair of fastening tapes 90 are fixed to each other. On the outer side in the width direction of the absorber 40, there is provided a leg expansion / contraction portion 75 that is formed around the leg opening 35 and that can expand and contract in the front-rear direction L.

  The manufacturing method of the absorbent article comprised in this way is not specifically limited. However, it is preferable that the top sheet 50 disposed in the region overlapping the groove 46 of the absorber 40 is disposed on the absorber 40 after the groove 46 of the absorber 40 is formed. Compared with the manufacturing method in which the groove portion 46 is formed by embossing the absorber 40 and the top sheet 50 in a state where the top sheet is disposed on the absorber 40, the shape of the concave and convex portions of the top sheet 50 is reduced. Can be maintained.

(2) Configuration of Top Sheet Next, the configuration of the top sheet 50 will be described in detail with reference to FIGS. 3 and 4. FIG. 3 is an enlarged cross-sectional view schematically showing a portion B of FIG. FIG. 4 is a perspective view schematically showing the top sheet 50 and the absorber 40. The top sheet 50 has a concave portion 51 and a convex portion 52. In addition, in the top view shown in FIG. 1, the convex part 52 and the recessed part 51 are abbreviate | omitted and shown. The concave portion 51 is recessed closer to the non-skin facing surface than the convex portion 52. The thickness T51 of the concave portion 51 is thinner than the thickness T52 of the convex portion 52. The convex part 52 protrudes in the thickness direction of a disposable diaper, and the recessed part 51 is depressed in the thickness direction. The portion located on the skin facing surface side T1 from the center 50CL in the thickness direction T of the top sheet 50 constitutes a convex portion 52, and is located on the non-skin facing surface side T2 from the center 50CL in the thickness direction of the top sheet 50. The located part constitutes a recess 51. Since the convex part 52 and the recessed part 51 are provided in the top sheet 50, while diffusing the body fluid discharged | emitted from the wearer in the front-back direction, it becomes easy to let the air between a disposable diaper and a wearer pass in the front-back direction. Therefore, the air permeability is improved.

  The density of the concave portions 51 is higher than the density of the convex portions 52. According to such a configuration, a difference in density occurs between the convex portion 52 and the concave portion 51. The body fluid is drawn from the low density region to the high density region, and the larger the density difference, the easier the body fluid is drawn. The body fluid quickly moves from the convex portion 52 to the concave portion 51 due to the density difference. Therefore, the body fluid drawn by the convex portion 52 located on the skin facing surface side is easily drawn by the concave portion 51. The body fluid remaining on the top sheet can be drawn quickly, reducing the wetness of the part that touches the skin and improving the wearing feeling. Moreover, skin troubles caused by stuffiness can be suppressed by improving air permeability.

  The density of the fiber of the bottom part 522 located in the non-skin opposing surface side in the convex part 52 is higher than the density of the fiber of the top part 521 located in the skin opposing surface side in the convex part 52. Also in the convex part 52, it becomes easy to guide a body fluid from the skin facing surface side T1 to the non-skin facing surface side T2, and the drawing-in property of the body fluid can be further enhanced. The portion of the convex portion 52 that is located on the skin facing surface side T1 from the center 50CL in the thickness direction T of the top sheet 50 constitutes the top portion 521, and the convex portion 52 from the center 50CL of the top sheet 50 in the thickness direction T. The portion located on the non-skin facing surface side T <b> 2 constitutes the bottom portion 522. The body fluid drawn into the top portion 521 of the convex portion 52 moves to the bottom portion 522 of the convex portion 52, and further moves from the bottom portion 522 of the convex portion 52 to the concave portion 51. The body fluid can be diffused in both the thickness direction T and the planar direction of the top sheet 50, and the body fluid adhering to the skin can be quickly drawn. It reduces the wetness of the part that touches the skin and can improve the wearing feeling.

  The concave portion 51 and the convex portion 52 each extend in the front-rear direction L. The concave portions 51 are arranged with an interval in the width direction W, and the convex portions 52 are arranged with an interval in the width direction W. The concave portions 51 and the convex portions 52 are alternately arranged in the width direction W. The top sheet 50 has a ridge groove structure having a ridge composed of convex portions 52 and a groove composed of concave portions. In the present embodiment, “extending along the front-rear direction” may be a configuration having at least a certain range in the front-rear direction, and includes a configuration extending in the front-rear direction while being inclined with respect to the front-rear direction. Since the convex part 52 and the recessed part 51 are extended in the front-back direction, air can be passed along the convex part 52 and the recessed part 51 in the front-back direction, and the stuffiness of the crotch region where much body fluid is discharged can be reduced. Moreover, a bodily fluid can be spread | diffused in the front-back direction along the convex part 52 and the recessed part 51, and a bodily fluid can be absorbed by the whole front-back direction of an absorber. The area of the absorbent body that absorbs bodily fluids can be widened to draw bodily fluids more quickly, reduce the wetness of the parts that touch the skin, and improve the feeling of wearing.

  The convex portion 52 and the concave portion 51 are provided on the entire surface of the top sheet 50. In the present embodiment, the front end edge of the convex portion 52 and the front end edge of the concave portion 51 coincide with the front end edge of the top sheet 50 and the front end edge of the disposable diaper, and are located in front of the front end edge of the absorbent body 40. In the present embodiment, the rear end edge of the convex portion 52 and the rear end edge of the concave portion 51 coincide with the rear end edge of the top sheet 50 and the rear end edge of the disposable diaper, and are located behind the rear end edge of the absorbent body 40. To position.

In addition, the thickness (length in the thickness direction) of the convex portion 52 and the thickness of the concave portion 51 can be measured as follows. Here, the thickness of the convex portion 52 is the thickness at the top of the convex portion 52, and the thickness of the concave portion 51 is the thickness of the deepest portion of the concave portion 51.
(I) Using a cutter knife (manufactured by KOKUYO, standard replacement blade for HA-100B, HA-NB), the fiber nonwoven fabric piece for thickness measurement is cut in parallel in the width direction, and the width of the fiber nonwoven fabric piece is Make a cutting plane parallel to the direction. After that, the surface of the fiber nonwoven fabric piece is placed on a horizontal plane, and a photograph of 25 times the observation cross section is obtained using a Keyence digital microscope VHX-100.
(Ii) The cross-sectional photograph is processed by image analysis software USB digital manufactured by SCARA, which is image processing software, and the image is binarized. At that time, the threshold value is set to 50. For the binarized image, the binary image shape analysis calculation method “fill hole” is selected, and then the target color “white” is selected and processed. Further, the calculation method “hole filling” of the binary image shape analysis is selected, and then the target color “black” is selected and processed. In the processed image, the staple fibers that protrude from the Hakushima portion, which is a group of staple fibers, to the outside of the image are erased, and a modified photograph of the cross section in the width direction without fluff is obtained.
(Iii) In the modified photograph, an intermediate point between the top of the ridge and the horizontal plane on which the sample is installed is set as the center in the thickness direction of the sheet. A portion located on the vertex side of the ridge portion with respect to the intermediate point is referred to as a convex portion 52, and a portion located on the horizontal plane side with respect to the intermediate point is referred to as a concave portion 51.
(Iv) In the modified photograph, the distance from the vertex of the ridge to the horizontal plane where the sample is installed is defined as the thickness of the ridge 52.
(V) The thickness of the concave portion 51 is defined as a distance from the point of the bottom of the concave stripe portion to the horizontal plane on which the sample is installed, perpendicular to the horizontal plane.

  Moreover, the density and basic weight of the fiber of a sheet | seat can be measured with the following measuring methods, for example. The area and weight of the sheet whose density is to be measured are measured, and the density is calculated based on the weight, area, and thickness. Further, the density of the convex portions 52 and the density of the concave portions 51 can be measured by cutting out only the convex portions 52 of the sheet and cutting out only the concave portions 51 and using the cut out portions.

(3) Configuration of Absorber Next, the configuration of the absorber 40 will be described in detail. As shown in FIGS. 5 and 6, the absorber 40 is in the form of a single sheet in the deployed state. The absorber 40 has a pair of first fold lines FL1 extending in the front-rear direction and a pair of second fold lines FL2 extending in the front-rear direction. The pair of first fold lines FL1 and the pair of second fold lines FL2 are fold lines for folding the absorber, and are formed in a state in which the absorber is folded. The absorber 40 is folded at four locations by a pair of first fold lines FL1 and a pair of second fold lines FL2, and is laminated in a plurality of layers. The pair of first fold lines FL1, the pair of second fold lines FL2, and the first fold line FL1 and the second fold line FL2 are separated from each other in the width direction. As shown in FIG. 5, the second fold line FL <b> 2 is wider than the first fold line FL <b> 1 in the unfolded state of the absorber 40 (the state in which the absorber 40 is not folded by the first fold line FL <b> 1 and the second fold line FL <b> 2). Located outside of. As shown in FIG. 2, in the folded state of the absorbent body (the state folded by the first fold line FL1 and the second fold line FL2), the second fold line FL2 is on the inner side in the width direction than the first fold line FL1. Located in.

  In the folded state, the absorbent body 40 has a first region 401 located between the pair of first fold lines FL1 and a pair of second regions 402 located between the first fold line FL1 and the second fold line FL2. And a pair of third regions 403 located on the outer side in the width direction than the second fold line FL2. In the unfolded state shown in FIGS. 5 and 6, the first region 401 is a region between the pair of first fold lines FL <b> 1 including the center in the width direction W of the absorber 40. The second region 402 is located on both sides of the first region 401 in the expanded state, and is a region between the first fold line FL1 and the second fold line FL2. The third region 403 is a region located on both sides of the first region 401 and the pair of second regions 402 in the unfolded state and between the second fold line FL2 and the outer side in the width direction. The first region 401, the second region 402, and the third region 403 are continuous in the width direction W. The first region 401, the second region 402, and the third region 403 are covered with a single continuous core wrap 40b. The core wrap 40b straddles the first region 401, the second region 402, and the third region 403.

  The absorber 40 is valley-folded to the wearer by the first fold line FL1, and is mountain-folded to the wearer by the second fold line FL2. In the folded state in which the absorbent body 40 is folded, the second region 402 is disposed on the skin facing surface side T1 of the first region 401, and the third region 403 is disposed on the skin facing surface side T1 of the second region 402. . It is sufficient that at least a part of the third region 403 is disposed on the skin facing surface side T <b> 1 of the second region 402. Since the absorber 40 is folded by the first fold line FL1 and the second fold line FL2, the dimension in the width direction becomes compact.

  The pair of second fold lines FL2 are separated in the width direction W in the folded state. Between the first fold line FL1 and the second fold line FL2, an overlapping portion 45 in which the first region 401, the second region 402, and the third region 403 are disposed is formed. The overlapping portion 45 is a portion where the first region 401, the second region 402, and the third region 403 are stacked, and is a portion between the first fold line FL1 and the second fold line FL2. Only the first region 401 is disposed between the pair of second fold lines FL2. Between the pair of second fold lines FL2, the thickness of the absorber 40 is relatively thin and is recessed on the non-skin facing surface side T2 as compared with the outer region in the width direction than the pair of second fold lines FL2. Yes.

  A portion located between the pair of overlapping portions 45 and recessed from the overlapping portion 45 constitutes a groove 46. The groove part 46 is a part which is located in the center of the width direction W of the absorber 40, and is dented in the non-skin opposing surface side rather than the surrounding absorber (superimposed part 45 adjacent to the groove part 46). The groove portion 46 is provided between the pair of overlapping portions 45. The absorber 40 located on the non-skin facing surface side of the groove portion 46 is configured only by the first region 401, and the overlapping portion 45 is configured by the first region 401, the second region 402, and the third region 403. Yes. Therefore, the length (depth) D1 in the thickness direction of the groove portion 46 is shorter than the length in the thickness direction of the surrounding absorber (the overlapping portion 45 adjacent to the groove portion 46). Since the center in the width direction W of the absorbent body 40 is recessed in the non-skin facing surface side T2, a space extending in the front-rear direction can be formed between the wearer and the absorbent body. The body fluid can be diffused in the front-rear direction by the space, and it becomes easy to effectively utilize the absorption performance over the entire front-rear direction of the absorber. In addition, since the thickness of the absorber 40 (overlapping portion 45) located on the outer side in the width direction than the groove portion 46 is thicker, it is easier to maintain the shapes of the convex portion 52 and the concave portion 51 provided in the region overlapping the groove portion 46. Therefore, the air permeability by the convex part 52 and the concave part 51 can be further improved. In addition, since the groove portion 46 is formed by folding the absorbent body, the difference in weighing between the groove portion and the surrounding area is compared with the configuration in which the groove portion is formed by changing the basis weight of one layer of the absorbent body. The thickness difference is likely to be noticeable, and the depth of the groove portion is easily highlighted.

  Further, the convex portion 52 and the concave portion 51 provided on the top sheet are arranged in a region overlapping the groove portion 46. The convex portion 52 and the concave portion 51 may be provided in a part of the region overlapping with the groove portion 46, and may not overlap the entire region overlapping with the groove portion 46. The convex part 52 and the concave part 51 of this Embodiment are arrange | positioned so that the whole skin opposing surface of the absorber 40 may be covered.

  The convex portion 52 and the concave portion 51 of the top sheet 50 continuously overlap from the front end edge of the groove portion 46 to the rear end edge of the groove portion 46. The front end edge of the groove portion 46 of the present embodiment matches the front end edge of the absorber, and the rear end edge of the groove portion matches the rear end edge of the absorber. Since the convex portion 52 and the concave portion 51 continuously overlap from the front end edge of the groove portion 46 to the rear end edge of the groove portion 46, the convex portion 52 and the concave portion 51 are convex in a space continuously extending from the front end edge of the absorber 40 to the rear end edge of the absorber 40. Air can be continuously diffused along the portion 52 and the recess 51. Air between the absorbent body and the wearer can be more easily guided to the outside in the front-rear direction than the absorbent body 40, and air permeability can be further improved.

  The convex portion 52 and the concave portion 51 of the top sheet 50 extend in the front-rear direction across the front end edge of the absorber 40 and the rear end edge of the absorber. A region adjacent to the front end edge of the absorber on the front side of the front end edge of the absorber 40 is recessed on the non-skin facing surface side T2 by the thickness of the absorber, and it is difficult to apply body pressure. Similarly, the region adjacent to the rear end edge of the absorber 40 on the rear side of the rear end edge of the absorber 40 is recessed toward the non-skin facing surface side by the thickness of the absorber 40, and it is difficult to apply body pressure. . The shape of the convex portion 52 and the concave portion 51 arranged in the region where it is difficult to apply the body pressure is easily maintained. Therefore, the effect of allowing air to pass in the front-rear direction and improving the air permeability can be further exhibited.

  The length (depth) of the groove portion 46 in the thickness direction T is longer than the length of the convex portion 52 in the thickness direction T. Since the length in the thickness direction of the groove 46 is longer than the length in the thickness direction of the protrusion 52, the protrusion 52 and the recess 51 are disposed in the region where the groove 46 is provided in the thickness direction. The body pressure applied to the disposable diaper 10 is applied to the convex portion 52 and the concave portion 51 that overlap the region other than the groove portion 46, and then to the convex portion 52 and the concave portion 51 that are arranged to overlap the groove portion 46. Therefore, the body pressure applied to the convex portion 52 and the concave portion 51 disposed so as to overlap the groove portion 46 is reduced, and the shapes of the convex portion 52 and the concave portion 51 disposed so as to overlap the groove portion 46 are easily maintained. Therefore, the effect of allowing air to pass in the front-rear direction and improving the air permeability can be further exhibited. By guiding the air in the region where the absorber is disposed to the outside in the front-rear direction than the absorber, the stuffiness due to the body fluid absorbed by the absorber can be effectively reduced.

  FIG. 7 is a view schematically showing the top sheet 50 and the absorber 40 in the cross section shown in FIG. Fig.7 (a) has shown the state before wear, FIG.7 (b) has shown the state after wear. In the state before wearing, the top sheet 50 is disposed along the skin-facing surface of the absorber, and the convex portion 52 and the concave portion 51 of the top sheet are formed on the entire surface of the absorber as shown in FIG. They are arranged with a substantially uniform thickness. Specifically, in a state before the body pressure of the wearer is applied, the thickness L1 of the convex portion 52 in the region overlapping the groove portion 46 is the same thickness as the thickness L2 of the convex portion 52 overlapping the overlapping portion 45. .

  When the wearer's body pressure is applied to the disposable diaper, as shown in FIG. 7B, the disposable diaper 10 is pressed from the skin facing surface side T1 toward the non-skin facing surface side T2. The two-dot chain line shown in the figure indicates the wearer's body line. At this time, since the groove part 46 located in the center in the width direction of the absorbent body is recessed toward the non-skin facing surface side, the top sheet 50 in the region overlapping the groove part 46 is compared with the top sheet 50 overlapping the periphery of the groove part 46. It is difficult to receive body pressure. Therefore, the convex part 52 and the concave part 51 of the top sheet 50 arranged in the region overlapping with the groove part 46 are not easily crushed and it is easy to maintain the shape. In the state where the wearer's body pressure is applied, the thickness L4 of the convex portion 52 that overlaps the overlapping portion 45 is thinner than the thickness L3 of the convex portion 52 in the region that overlaps the groove portion 46. Since it is easier to maintain the shape of the convex portion 52 and the concave portion 51 provided in the region overlapping the groove portion 46, air is diffused through the convex portion 52 and the concave portion 51 disposed in the region overlapping the groove portion 46, thereby improving the wearability. It can be improved.

  The overlapping portion 45 in which the first region 401, the second region 402, and the third region 403 are stacked is disposed outside the groove portion 46 in the width direction. The basis weight of the absorbent material of the overlapping portion 45 (absorber adjacent to the groove) is higher than the basis weight of the absorbent material of the groove 46. Therefore, the bodily fluid drawn into the groove part 46 via the convex part 52 and the recessed part 51 provided in the area | region which overlaps with the groove part 46 is absorbed by the superimposition part 45 with comparatively high basic weight, and the drawing property of a bodily fluid can further be improved.

  The groove 46 extends in the front-rear direction, and is continuously provided from the front end edge to the rear end edge of the absorber 40. Since the groove portion 46 of the absorbent body extends in the front-rear direction, the convex portion 52 and the concave portion 51 of the top sheet can be maintained in a certain region extending in the front-rear direction of the absorbent body, and air permeability can be improved. Moreover, since all the groove part 46, the convex part 52, and the recessed part 51 are extended in the front-back direction, the convex part 52 and the recessed part 51 are arrange | positioned along the dent of the groove part 46, and it becomes easier to maintain the shape.

  The inner edge of the overlapping portion 45 has a wall portion 47 extending toward the non-skin facing surface side. The wall portion 47 constitutes an outer edge of the groove portion 46. The convex portion 52 and the concave portion 51 are disposed in a region that covers the wall portion 47. The wall portion 47 extends toward the non-skin facing surface side T2, and is less susceptible to body pressure than a region extending in the planar direction. The convex portion 52 and the concave portion 51 arranged in the region covering the wall portion 47 are not easily crushed by body pressure or the like, and the shape is easily maintained. By making it easier to maintain the shapes of the convex portions 52 and the concave portions 51, the air permeability of the convex portions 52 and the concave portions 51 can be further improved.

  FIG. 8 is a cross-sectional view schematically showing a wearing state of the disposable diaper. When the disposable diaper 10 is attached to the wearer, the disposable diaper 10 is sandwiched between the wearer's legs. A disposable diaper is pinched by a wearer's leg, and the force which goes to the inner side of the width direction W from the outer side of the width direction W is applied. Since only the third region 403 is disposed outside the first folding line FL1 in the width direction, the force directed from the outside in the width direction W to the inside in the width direction W is applied to the outer edge 403E of the third region 403. It takes. The third region 403 absorbs a force from the outside in the width direction toward the inside in the width direction by being deformed. Therefore, the first region 401 can be prevented from being deformed by the force, and the width of the groove 46 can be secured. Further, by preventing the first region 401 from being deformed by the force, the shape of the groove 46 located on the skin facing surface side of the first region 401 and the convex portion 52 and the concave portion 51 arranged in the region overlapping the groove portion 46 are provided. It becomes easy to maintain the shape.

  In addition, when the third region 403 is deformed so as to rise to the wearer side, the walls formed by the third regions 403 located on both sides of the groove 46 are raised. As the wall formed by the third region 403 is increased, the depth of the recessed portion of the groove 46 is increased. The convex portion 52 and the concave portion 51 disposed in the region overlapping the groove portion 46 are less likely to receive body pressure directly, the shape thereof is easily maintained, and air permeability can be further improved.

  The basis weight of the absorbent material in the second region 402 is lower than the basis weight of the absorbent material in the first region 401 and lower than the basis weight of the absorbent material in the third region 403. Specifically, the first region 401 has pulp and SAP, and the second region 402 has substantially no absorbent material. The second area 402 has zero basis weight of the designed absorbent material such as SAP, but may have SAP or pulp mixed in from the first area or the like in the manufacturing process. The basis weight of the pulp in the first region 401 and the basis weight of the pulp in the third region 403 are higher than the basis weight of the pulp in the second region 402. Moreover, the 2nd area | region 402 may contain the pulp of the basic weight lower than the 1st area | region 401 grade | etc., And may be comprised only with the core wrap 40b without including both a pulp and SAP, Due to the low basis weight, body fluid can be smoothly guided to the first region 401 through the second region 402.

  Since the basis weight of the pulp in the first region 401 is higher than the basis weight of the pulp in the second region 402, body fluid easily moves from the second region 402 to the first region 401 in the overlapping portion, and the non-skin facing surface side T2 It becomes easy to guide the body fluid to the first region 401 located at the position. The first fold line FL1 and the second fold line FL2 are formed with a difference in rigidity due to a difference in basis weight of the pulp. Therefore, it becomes easier to fold the absorber 40 based on the first fold line FL1 and the second fold line FL2.

  The thickness of the second region 402 is thinner than the thickness of the first region 401 and thinner than the thickness of the third region 403. The first fold line FL1 and the second fold line FL2 are boundaries where the thickness and basis weight of the absorber 40 change, and are boundaries where the rigidity changes. Therefore, it is easy to fold the absorber 40 from the first fold line FL1 and the second fold line FL2.

(4) Joining Mode of Absorbers and Joining Mode of Absorbers and Non-Skin Surface Sheet Next, a joining mode of absorbers and a bonding mode of the absorber and non-skin sheet will be described. As shown in FIG. 2, the disposable diaper 10 includes a first joint R1, a second non-joint part NR2, a third joint R3, and a third non-joint in a folded state where the absorber 40 is folded. Part NR3. Each joint is a region where an adhesive such as a hot-melt adhesive is disposed. By having the first joint portion R1, the second non-joint portion NR2, the third joint portion R3, and the third non-joint portion NR3, the unintended deformation of the disposable diaper 10 at the time of wearing is suppressed, and excrement leaks. Can be suppressed. Moreover, although not shown in figure, the non-skin opposing surface and non-skin surface sheet | seat of a 1st area | region are joined.

  The first joint R1 is a portion where the skin facing surface of the first region 401 and the non-skin facing surface of the second region 402 are joined. The first joint R1 may be provided on the entire surface where the skin facing surface of the first region 401 and the non-skin facing surface of the second region 402 face each other, or provided on a part of the facing surface. May be. When the first joint R1 is provided, when a force is applied to the disposable diaper 10 from the outer side in the width direction toward the inner side in the width direction, the positions of the first region 401 and the second region 402 are changed. Shifting is suppressed, and the folding structure by the first folding line FL1 is easily maintained. Therefore, unintended deformation of the first region 401 and the entire absorber can be prevented from entering into the width, and the width of the groove 46 can be ensured.

  The second non-joint portion NR2 is a portion where the skin facing surface of the second region 402 and the non-skin facing surface of the third region 403 are not joined. The second non-joint portion NR2 is provided on the entire surface where the skin facing surface of the second region 402 and the non-skin facing surface of the third region 403 face each other at least in the crotch region 25. The second non-joined portion NR2 extends across the center of the disposable diaper 10 in the front-rear direction and extends in the front-rear direction in the crotch region 25. Since the skin facing surface of the second region 402 and the non-skin facing surface of the third region 403 are not joined in the crotch region 25, when a force is applied from the outside in the width direction to the inside in the width direction, The left and right third regions 403 are deformed so as to rise to the wearer side with the second region 402 joined to the region 401 as a base point. Therefore, the depth of the groove part 46 becomes deeper. The convex portion 52 and the concave portion 51 arranged in the region overlapping with the groove portion 46 are less likely to receive body pressure directly, the shape thereof is easily maintained, and the air permeability improvement effect by the convex portion and the concave portion can be further exhibited.

  The third joint portion R3 is a portion where the third region 403 and the non-skin surface sheet are joined. More specifically, in the third joint portion R3, the non-skin facing surface of the third region 403 and the skin facing surface of the back sheet 60a as the non-skin surface sheet are joined. The range of the third region 403 in the front-rear direction L is the entire region of the absorber 40 in the front-rear direction L. The range in the width direction W of the third joint R3 is a certain range extending from the outer edge of the third region 403 to the inside in the width direction W. The third joint portion R3 is located outside the first fold line FL1 in the width direction W and is separated from the first fold line FL1. A third non-joining portion NR3 is provided on the inner side in the width direction W than the third joining portion R3. The third non-joined portion NR3 is a portion where the third region 403 and the non-skin surface sheet are not joined. The third non-joining portion NR3 straddles the center in the front-rear direction of the disposable diaper 10 and extends in the front-rear direction L in the crotch region 25. The third non-joining part NR3 is inside the width direction W from the third joining part R3 and outside the width direction W from the first fold line FL1. In the inner region in the width direction than the first fold line FL1, the first region 401 and the back sheet 60a are joined.

  The third region 403 and the back sheet 60a are joined by the third joining portion R3 and are not joined by the third non-joining portion NR3. Therefore, when a force is applied from the outer side in the width direction W to the inner side in the width direction W, the absorbent body 40 that comes into contact with the third non-joint portion NR3 with the third joint portion R3 as a base point rises to the wearer side. The space S1 which is deformed and is surrounded by the third region 403, the back sheet 60a, and the first region 401 can be provided at least in the crotch region 25 (see FIG. 8). Moisture can be diffused in the front-rear direction L by the space S1, so that the wetness of the portion that touches the skin can be reduced and the wearing feeling can be improved. Moreover, the depth of the recessed part of the groove part 46 becomes deep because the wall by the 3rd area | region 403 becomes high. The convex portion 52 and the concave portion 51 disposed in the region overlapping the groove portion 46 are less likely to receive body pressure directly, the shape thereof is easily maintained, and air permeability can be further improved.

(5) Absorbent article according to modified example Next, the absorbent article according to the modified example will be described with reference to FIGS. In the description of the modification, the same reference numerals are used for the same configurations as those in the embodiment, and the description is omitted. FIG. 9 is a cross-sectional view of a cross section along the width direction of the disposable diaper 10 </ b> A according to the first modification. FIG. 9 is a view based on a cross section taken along the line AA shown in FIG. 1, and the disposable diaper 10 </ b> A according to Modification 1 is in the central region in the width direction of the first region 401 of the absorbent body 40. In the fourth joint R4 where the back sheet 60a as the non-skin surface sheet is joined to the first region 401, and in the region from the outer edge of the first region 401 toward the inside in the width direction W, the first region 401 and the non-skin surface sheet 4th non-joining part NR4 to which the back sheet 60a as a skin sheet is not joined. In the central region in the width direction of the first region 401, the first region 401 and the non-skin surface sheet are joined at the fourth joint R4. In the region from the outer edge of the first region 401 to the outer edge of the fourth joint portion R4, the fourth non-joint portion NR4 is not joined.

  According to the disposable diaper 10A according to the first modification, a force is applied from the outside in the width direction W toward the inside in the width direction, and when the left and right third regions 403 are deformed so as to rise to the wearer side, the first region It becomes easy to deform | transform so that the outer edge of 401 may also rise to a wearer side. Therefore, the space S1 surrounded by the third region 403, the non-skin surface sheet, and the second region 402 can be formed wider. Moisture can be diffused in the front-rear direction by the space S1, and the wearing feeling can be improved. Further, according to the disposable diaper 10A according to the first modification, a force is applied from the outer side in the width direction toward the inner side in the width direction, and when the left and right third regions are deformed to rise toward the wearer side, the first region It becomes easy to deform | transform so that the outer edge of may also rise to a wearer side. Therefore, the height of the overlapping portion becomes higher, and the length of the groove portion in the thickness direction becomes longer. It is difficult for body pressure to be applied by the convex portions and the concave portions arranged in the groove portions, and the air permeability improvement effect by the convex portions and the concave portions can be further exhibited.

  FIG. 10 shows a top sheet of an absorbent article according to the second modification. The convex portion 52A and the concave portion 51A of the top sheet 50A according to Modification 1 are different from the convex portion 52 and the concave portion 51 of the embodiment. The top sheet 50A according to the modified example 2 is subjected to thermocompression bonding by embossing, and a large number of welds are formed over the entire surface. In the welded portion, the composite fibers are thermally fused together to form a film. The welded portion is recessed in the thickness direction and constitutes a recess 51A. Also with the top sheet 50A according to the modified example 2 configured as described above, the air permeability can be improved by the convex portions 52A and the concave portions 51A, the stuffiness can be suppressed, the wetness of the portion touching the skin can be reduced, and the wearing feeling can be improved. . Moreover, skin troubles caused by stuffiness can be suppressed by improving air permeability.

  Further, the convex portion 52A is in a state where the degree of squeezing is low or not squeezed. Since the concave portion 51A has a higher degree of compression than the convex portion 52A, the rigidity of the concave portion 51A is higher than the rigidity of the convex portion 52A. When the top sheet 50A according to Modification 2 is contracted in the width direction by an elastic member that expands and contracts in the width direction, such as a waist elastic member, the thickness of the protrusion is secured while ensuring the length in the width direction of the recess. The length in the vertical direction can be increased. FIG. 10B shows a state before the top sheet 50A contracts in the width direction W, in other words, an expanded state. FIG. 10C shows a state after the top sheet 50A contracts in the width direction W. In other words, it indicates a natural state.

  In the state before the top sheet 50A contracts in the width direction W, the protrusions 52A and the protrusions 52A are arranged with an interval T3 in the width direction W, and the thickness L5 of the protrusions 52A is the thickness of the recesses 51A. Thicker than L6. In the state after the top sheet 50 </ b> A contracts in the width direction W, the protrusions 52 </ b> A and the protrusions 52 </ b> A are arranged with an interval T <b> 3 in the width direction W. The concave portion 51A between the convex portion 52A and the convex portion 52A has high rigidity and is difficult to deform. Therefore, when the rigidity of the concave portion is higher than the contraction force in the width direction, the interval T3 between the convex portion 52A and the convex portion 52A is the same before and after the deformation, and the thickness L6 of the concave portion 51A is the deformation Same before and after deformation. On the other hand, the convex portion 52A has low rigidity and is easily deformed. Therefore, when the rigidity of the convex portion is lower than the contraction force in the width direction, the convex portion contracts in the width direction. The thickness L7 of the convex portion after deformation is thicker than the thickness L5 of the convex portion before deformation. The length W2 in the width direction of the convex portion after deformation is longer than the length W1 in the width direction of the convex portion before deformation.

  According to the absorbent article which has the top sheet 50A which concerns on the modification 2, when the top sheet 50 shrink | contracts along the direction orthogonal to the direction where a convex part and a recessed part extend, the length in the orthogonal direction of a recessed part is set. The thickness of the convex portion (depth of the concave portion) can be increased while ensuring. Therefore, the flow rate of air diffusing along the convex part and the concave part can be increased, and the effect of improving air permeability can be enhanced.

  As another modification, the absorber 40 does not need to be folded. The groove 46 of the absorbent body may be formed by laminating an absorbent material so that the basis weight or thickness is thinner than the surroundings. Moreover, the absorber may have a plurality of absorbent layers laminated. The groove portion of the absorber may be a portion having a smaller number of absorption layers than the surrounding absorber.

  Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

10, 10A: disposable diaper (absorbent article)
20: Front waistline area 25: Inseam area 30: Rear waistline area 40: Absorbent body 40a: Absorbing core 40b: Core wrap 45: Superposition part 46: Groove part 401: First area 402: Second area 403: Third area 50: Top Sheet 51: Concave portion 52: Convex portion L: Front-back direction T: Thickness direction W: Width direction FL1: First fold line FL2: Second fold line R1: First joint NR2: Second non-joint part R3: Third Junction NR3: Third non-junction

Claims (5)

Forward and backward,
A width direction orthogonal to the front-rear direction;
An absorber having an absorbent material;
A skin sheet positioned on the skin-facing surface side of the absorber, and
The skin sheet is an absorbent article having a convex part and a concave part recessed on the non-skin facing surface side than the convex part,
The absorbent body has a groove portion that is recessed toward the non-skin facing surface side than the surrounding absorbent body at the center in the width direction of the absorbent body.
The convex portion and the concave portion are arranged in a region extending in the front-rear direction and overlapping the groove portion,
The groove extends in the front-rear direction and is continuously provided from the front end edge of the absorber to the rear end edge of the absorber ,
The absorber has a pair of first and second fold lines extending in the front-rear direction,
In the folded state in which the absorber is folded,
A first region located between the pair of first fold lines and including a center in the width direction of the absorber;
A pair of first folds positioned between the second fold line and the first fold line located on the inner side in the width direction than the first fold line and disposed on the skin facing surface side of the first region, respectively. Two areas,
A pair of third regions respectively disposed on the skin facing surface side of the second region outside the second fold line in the width direction;
The pair of second fold lines are separated in the width direction,
The groove is provided between a pair of overlapping portions in which the first region, the second region, and the third region overlap,
The outer edge of the third region is disposed outside the first fold line in the width direction,
In the folded state,
A first joint where the skin facing surface of the first region and the non-skin facing surface of the second region are joined;
A second non-joining portion in which the skin facing surface of the second region and the non-skin facing surface of the third region are not joined,
A non-skin surface sheet positioned on the non-skin facing surface side of the absorbent body,
A third joining portion in which the third region and the non-skin sheet are joined;
A third non-joining portion that is located on the inner side in the width direction than the third joint portion and on the outer side in the width direction with respect to the first fold line, and in which the third region and the non-skin surface sheet are not joined; Have
The absorbent article which has a 4th non-joining part to which the 1st field and the non-skin sheet are not joined in the field which goes to the inner side of the width direction from the outside edge of the 1st field .   The absorbent article according to claim 1, wherein the convex portion and the concave portion continuously overlap from the front end edge of the groove portion to the rear end edge of the groove portion.   The absorbent article according to claim 1 or 2, wherein a length of the groove portion in a thickness direction is longer than a length of the convex portion in the thickness direction.   The said convex part and the said recessed part are absorbent articles in any one of Claims 1-3 extended in the said front-back direction ranging over the front-end edge of the said absorber, and the rear-end edge of the said absorber. The inner edge of the overlapping portion has a wall portion extending toward the non-skin facing surface side,
The absorptive article according to any one of claims 1 to 4 in which said convex part and said crevice are arranged in a field which covers said wall part.

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