JP4812614B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article for absorbing liquid discharged from the body, such as menstrual blood, vaginal discharge, and urine. Specifically, the present invention relates to an absorbent article having wing portions on both sides of an absorbent main body.

Conventionally, as an absorbent article such as a sanitary napkin, a vertically long absorbent main body having a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer, and a pair of wings provided on both sides of the absorbent main body And a part having a part.
The wing portion prevents misalignment and twisting of the absorbent article during use, and prevents the underwear such as shorts for fixing the absorbent article from becoming dirty.
In general, the wing portion is provided with an adhesive portion on the non-skin contact surface side, and when the absorbent article is fixed to shorts or the like, the wing portion is bent along the side edge of the crotch portion, and the adhesive portion is It is fixed to the non-skin facing surface of the crotch part.

As an absorbent article having a wing portion, Patent Document 1 discloses that a composite sheet formed by joining strips of plastic film on a nonwoven fabric surface is provided on at least a part of a wing portion, and the direction of the strip is set. A sanitary napkin is described that is substantially aligned with the longitudinal direction of the napkin.
Patent Document 2 describes the formation pattern of the heat-sealed portion formed on the nonwoven fabric by forming a wing portion using a stretchable nonwoven fabric containing crimped crimpable fibers and heat-fusible fibers. There is described an absorbent article in which a plurality of regions having different stretchability are provided in the wing portion by making them different.

JP-A-7-303670 JP 2004-154351 A

According to Patent Document 1, in the sanitary napkin described in Patent Document 1, the direction of the strip of the plastic film is substantially matched with the longitudinal direction of the napkin, and the wing portion is easily bent along the longitudinal direction of the napkin. The wing part bends accurately along the side edge of the crotch part of the shorts.
However, because the plastic film strips provided on the composite sheet that composes the wing part touch the skin, the texture such as the touch is inferior, and the part where the plastic film is fixed adheres to the skin and the air flows. In order to prevent it, the air permeability is also insufficient.
Moreover, in the absorbent article of patent document 2, although the part which provided the said heat-fusion part in the nonwoven fabric which comprises a wing part is a recessed part, in order to give favorable elasticity to the base part vicinity of a wing part. Therefore, it is necessary to reduce the number of heat-sealed portions at that portion as much as possible. Therefore, it is difficult to simultaneously impart good folding ease and good air permeability near the base of the wing part.

  Therefore, the object of the present invention is to prevent folding wrinkles extending in the width direction of the absorbent article from preferentially folding along the longitudinal direction of the absorbent article, and to give the wearer an uncomfortable feeling. An object of the present invention is to provide an absorbent article that can be prevented, has good air permeability at the wing, and is less prone to stuffiness.

  The present invention relates to an absorbent article having a vertically long absorbent main body having an absorbent layer and a leak-proof layer, and a pair of wing portions provided on both sides of the absorbent main body. The surface side is composed of a three-dimensional sheet in which an upper layer made of non-woven fabric and a lower layer made of a sheet-like material are partially joined to form a large number of joints, and the three-dimensional sheet has the upper layer other than the joints The portion protrudes toward the wearer's skin side to form a large number of convex portions, and the convex portions and the joint portions are arranged alternately and in a line in one direction. When a focus is placed on any one convex portion in one row, and the left and right rows adjacent to the row have a convex portion located at a position adjacent to the one convex portion. The three-dimensional sheet absorbs the direction in which each row extends. It is arranged substantially aligned with the longitudinal direction of the sex article is obtained by achieving the above object by providing an absorbent article.

  In the absorbent article of the present invention, the wing portion is preferentially bent along the longitudinal direction of the absorbent article, so that folding wrinkles extending in the width direction of the absorbent article are unlikely to occur, and the wearer feels uncomfortable. It can be prevented, and the air permeability of the wing portion is good, so that it is difficult to cause stuffiness or the like.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
The sanitary napkin 1 which is the first embodiment of the absorbent article of the present invention has a vertically long structure including a liquid-retaining absorbent layer 20 and a liquid-impermeable leak-proof layer 30, as shown in FIGS. The absorbent main body 6 and a pair of wing portions 7, 7 provided on both sides of the absorbent main body 6 in the longitudinal direction.

  As shown in FIG. 2, the absorbent layer 20 includes a liquid-permeable top sheet 21 and a liquid-retaining absorbent 22, and the leak-proof layer 30 is a liquid-impermeable or liquid-permeable back sheet 31. Consists of. The absorber 22 is sandwiched and fixed between the top sheet 21 and the back sheet 31. The top sheet 21, the absorber 22 and the back sheet 31 are integrated to form the absorbent main body 6. On the non-skin contact surface of the absorbent main body 6, a main body adhesive portion (not shown) for fixing the absorbent main body 6 to the shorts is provided.

  As shown in FIG. 2, each wing portion 7 in the napkin 1 of the present embodiment has at least a skin contact surface side in which an upper layer 2 made of a nonwoven fabric and a lower layer 3 made of a sheet-like material are partially joined to each other. It consists of the solid sheet 10 in which the junction part 4 is formed. The upper layer 2 forms the skin contact surface of the wing part 7. The lower layer 3 is disposed on the non-skin contact surface side of the upper layer 2.

  As shown in FIG. 3, the three-dimensional sheet 10 has an upper layer 2 made of non-woven fabric that protrudes toward the wearer's skin side at portions other than the joint 4 to form a plurality of convex portions 5. When the portions 5 and the joint portions 4 are alternately arranged in a row in one direction, and the rows are arranged in multiple rows, when attention is paid to any one convex portion in one row In the left and right rows adjacent to the row, no convex portion is positioned adjacent to the one convex portion.

In the sanitary napkin 1 of this embodiment, as shown in FIG.1 and FIG.2, the side leak-proof part 8,8 is formed in the longitudinal direction both sides of the absorptive main body 6, and the side leak-proof part 8, 8 is also formed by the three-dimensional sheet 10.
The three-dimensional sheet 10 has a portion that constitutes the side leak-proof portion 8 and a portion that extends laterally from the absorbent main body 6 and constitutes a part of the wing portion 7.
As shown in FIG. 2, the wing portion 7 is a portion extending laterally from the absorbent main body 6 in the three-dimensional sheet 10 and a portion extending laterally from the absorbent main body 6 in the back sheet 31 described above. The three-dimensional sheet 10 and the extended portion 31a of the back sheet in the wing portion 7 are joined and integrated by an adhesive or the like. An adhesive portion 71 for fixing the wing portion 7 to a non-skin facing surface of the crotch portion of the shorts is formed on the surface of the wing portion 7 on the non-skin contact surface side. The non-skin facing surface of the crotch portion includes the lower surface of the upper layer in the crotch portion having a two-layer structure composed of upper and lower layers.

The three-dimensional sheet 10 in the present embodiment will be described more specifically.
The three-dimensional sheet 10 has a two-layer structure including an upper layer 2 and a lower layer 3, and the upper layer 2 and the lower layer 3 are partially bonded at a large number of bonding portions 4. The upper layer 2 protrudes toward the wearer's skin side at a portion other than the joint portion 4 to form a convex portion 5. The inside of the convex part 5 is hollow.

  In the present embodiment, the bottom surface of the convex portion 5 is rectangular. Further, the convex portion 5 is a flat rectangular parallelepiped or truncated quadrangular pyramid having rounded ridge lines as a whole. On the other hand, the joint 4 is also rectangular.

  The convex portions 5 and the joint portions 4 are arranged alternately and in a row in one direction. In the present embodiment, as shown in FIG. 3, the convex portions 5 and the joint portions 4 are alternately arranged along the X direction in the figure to form a row. This X direction coincides with the flow direction in the manufacturing process of the three-dimensional sheet 10. Moreover, the row | line | column which consists of the convex part 5 and the junction part 4 is arrange | positioned at multiple rows over the Y direction in FIG.

In the three-dimensional sheet 10, when attention is paid to any one convex portion in one row (for example, row L _{A in} FIG. 5), left and right rows (for example, row L in FIG. 5) adjacent to the row. _{In B} , L _C ), no convex portion is located adjacent to the one convex portion. “No convex part is located adjacent to one convex part” means that when one convex part is focused, the convex part is not located at the same position in the adjacent row. I mean. In other words, in the Y direction in FIG. 3, it means that the protrusions are not arranged so that the protrusions between adjacent columns are completely connected. Therefore, both a part of a convex part and a part of junction part may exist in the position adjacent to one convex part, or only a junction part may exist. When the convex portion in the Y direction is arranged so as to be continuous entirely, will be convex portion extending long in apparently Y direction is formed, in which case, in the Y direction between the protrusions elongated A continuous concave portion is formed, and the three-dimensional sheet 10 is easily bent along the concave portion. Therefore, when the wing portion is bent, folding wrinkles extending in the width direction of the absorbent article are easily generated.

  In the three-dimensional sheet 10 according to the present embodiment, the joint portions are arranged so as to be shifted by a half pitch in two adjacent rows. Therefore, when attention is paid to any one joint portion in one row, the one joint portion is a closed concave portion formed by being surrounded by convex portions on the front and rear sides and the right and left sides. That is, the joints are arranged in a staggered pattern. Accordingly, the convex portions are similarly arranged in a staggered pattern.

  Since the convex portion 5 and the joint portion 4 are arranged in this manner, the three-dimensional sheet 10 has a direction (X direction in the drawing) in which a row including the convex portion 5 and the joint portion 4 extends and a direction orthogonal thereto. (Y direction) and the ease of bending differ. That is, the three-dimensional sheet 10 is more easily bent when compared with the ease of bending along the X direction and the ease of bending along the Y direction. Folding along the X direction means folding so that a folding line L1 substantially parallel to the X direction is generated, as shown in FIG.

The three-dimensional sheet 10 can be manufactured in the same manner as the method for manufacturing a surface sheet for absorbent articles described in JP 2004-174234 A, for example.
That is, as shown in FIG. 4, the first roll 11 having a concavo-convex shape on the peripheral surface, and the second roll having a concavo-convex shape meshing with the concavo-convex shape of the first roll 11 on the peripheral surface. The upper layer 2 made of a non-woven fabric that does not substantially expand and contract is bitten into the meshing portion of the roll 12 and the upper layer 2 is unevenly shaped, and the irregularly shaped upper layer 2 is sucked into the first roll 11 by suction. The lower layer 3 made of a sheet-like material that does not substantially expand and contract is superposed on the upper layer 2 while being held in a state where the peripheral surface is unevenly shaped, and the lower layer 3 is placed on the convex portion of the first roll 11. The three-dimensional sheet 10 having the convex portions 5 is obtained by bonding to the upper layer 2 located at the position.

In the manufacturing method shown in FIG. 4, the upper layer 2 and the lower layer 3 are partially heated and pressed between the convex portion of the first roll 11 and the heat roll 14 to form a heat-sealed portion as a joint portion. ing.
Moreover, in FIG. 4, although the upper layer 2 and the lower layer 3 are each drawn | fed out from roll-shaped raw fabric 2 ', 3', the sheet | seat which comprises the nonwoven fabric which comprises the upper layer 2, and the lower layer 3 instead You may provide the manufacturing line of a continuous form in the manufacturing line of the solid sheet 10 continuously.
In addition, the point which is not demonstrated especially about the manufacturing direction of the three-dimensional sheet 10 can be made the same as that of the manufacturing method of the surface sheet as described in Unexamined-Japanese-Patent No. 2004-174234.

As shown in FIG. 5, the three-dimensional sheet 10 in the present embodiment is arranged such that the direction (X direction) in which the row of the convex portions 5 and the joint portions 4 extends substantially coincides with the longitudinal direction LD of the sanitary napkin 1. ing.
Therefore, the wing part 7 of the napkin 1 is preferentially bent along the longitudinal direction of the napkin 1 due to the anisotropy of the ease of bending of the three-dimensional sheet 10. That is, when the easiness of bending along the longitudinal direction LD of the napkin and the easiness of bending along the width direction of the napkin are compared, the former is easier to bend. Bending along the longitudinal direction of the napkin 1 means folding so that a folding line substantially parallel to the longitudinal direction of the napkin 1 is generated.

According to the sanitary napkin 1 of the present embodiment, since the wing portion 7 is preferentially bent along the longitudinal direction of the napkin 1, the wing portion 7 is bent along the side edge of the crotch portion, and the adhesive portion 71 is interposed therebetween. Thus, when fixing to the non-skin facing surface of the crotch portion, folding creases extending in the width direction of the napkin 1 are unlikely to occur in the wing portion 7. Therefore, it is possible to prevent the wearer from feeling uncomfortable due to such folding lines.
Moreover, since many convex parts 5 are formed in the skin contact surface side of the three-dimensional sheet 10, and air flows between the convex parts 5 and the convex parts 5, it is favorable in the skin contact surface vicinity of the wing part 7. Air permeability can be ensured and the occurrence of stuffiness or the like can be prevented. In particular, the convex portion 5 in the present embodiment has a hollow inside, and air permeability inside the convex portion 5 is superior to a solid structure, so that air can flow even if the inside of the convex portion is interposed. Since it can be expected to flow, it is further excellent in air permeability and anti-dampness.

  In the three-dimensional sheet 10 according to the first embodiment, the nonwoven fabric constituting the upper layer 2 and the sheet-like material constituting the lower layer 3 are both substantially non-stretchable. By using such a sheet-like material, the three-dimensional sheet 10 substantially conforming to the uneven shape of the first and second rolls described above can be manufactured stably and with good reproducibility when forming the uneven shape of a desired dimension. it can. The substantially non-stretchable sheet-like material means, for example, an elongation limit of 105% or less, and material elongation or permanent deformation occurs when the elongation limit is exceeded.

In the present invention, as the nonwoven fabric constituting the upper layer 2 or the sheet-like material constituting the lower layer 3, conventionally known various nonwoven fabrics can be preferably used as the material for forming the absorbent article.
As a nonwoven fabric, an air-through nonwoven fabric in which heat-bonding points between fibers are formed on a fiber web obtained by the card method, and a heat-bonding point between fibers is formed on a fiber web obtained by the card method. Various non-woven fabrics such as the formed heat roll non-woven fabric, heat embossed non-woven fabric, spunbonded non-woven fabric, melt blown non-woven fabric, spunlace non-woven fabric, needle punched non-woven fabric, airlaid non-woven fabric, and resin bonded non-woven fabric can be used.

The constituent fiber of the nonwoven fabric constituting the upper layer 2 or the constituent fiber in the case where the lower layer 3 is constituted of a sheet-like material made of a fiber material such as a nonwoven fabric is preferably a heat-fusible fiber, particularly a fiber made of a thermoplastic polymer material. Used for. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. A core-sheath type composite fiber or a side-by-side type composite fiber made of a combination of these thermoplastic polymer materials can also be suitably used. The upper layer 2 and the lower layer 3 may contain, as constituent fibers, fibers other than the heat-fusible fibers (for example, cotton fibers) that do not have heat-fusible properties.
In 1st Embodiment, although the sheet-like material which comprises the lower layer 3 is also a nonwoven fabric, the sheet-like material which comprises the lower layer 3 in this invention is not restricted to a nonwoven fabric, For example, a resin film and a resin film on the paper surface Laminated laminated paper, composite paper in which heat-bonding fibers made of thermoplastic polymer are combined with paper, and the like may be used.

  The non-woven fabric constituting the upper layer 2 is soft and rich in cushioning properties, forms a convex portion 5 that easily deforms following the movement of the skin, and reduces the friction with the skin to reduce irritation to the skin. The average fineness is preferably 0.1 to 5.0 dtex, particularly preferably the average fineness is 0.1 to 3.3 dtex.

Moreover, the nonwoven fabric which comprises the upper layer 2 is soft and rich in cushioning properties, forms the convex part 5 which is easy to deform | transform according to the movement of skin, and from a viewpoint of reducing the irritation | stimulation to skin by reducing friction with skin, It is preferable that the fiber contains the shrunk fiber.
As the crimped fiber, a two-dimensional crimped fiber mechanically bent in a zigzag shape or a three-dimensional crimped fiber expressing a spiral crimp can be used. As the crimped fiber that exhibits a spiral crimp, a latent crimpable fiber that exhibits a spiral crimp by heat treatment is preferably used. The latent crimpable fiber includes, for example, an eccentric core-sheath type composite fiber or a side-by-side type composite fiber containing two types of thermoplastic polymer materials having different shrinkage rates as components. Examples thereof include those described in JP-A-9-296325 and Japanese Patent No. 2759331. Examples of two types of thermoplastic polymer materials having different shrinkage rates include, for example, a combination of polyethylene (PE) and polypropylene (PP), a combination of ethylene-propylene random copolymer (EP) and polypropylene (PP), and the like. Are preferable. The crimped fibers are preferably contained in the nonwoven fabric constituting the upper layer 2 in an amount of 50% by weight or more, particularly 70 to 90% by weight.

Moreover, it is preferable that the nonwoven fabric which comprises the upper layer 2 is water-repellent from the point which prevents the menstrual blood from a wing part, and a seepage thing, and maintains a clean feeling.
Water-repellent non-woven fabrics include essentially hydrophobic polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polyamide, cellulose acetate fibers, and essentially hydrophilic cellulose fibers such as rayon, lyocell, and tencel, and polyvinyl. Air-through nonwoven fabric, heat roll nonwoven fabric, heat embossed nonwoven fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, spunlace nonwoven fabric, needle punched nonwoven fabric, airlaid A nonwoven fabric, a resin bond nonwoven fabric, etc. can be used.

From the viewpoint of further improving one or more of the effects described above, the height H (see FIG. 3) of the convex portion 5 is preferably 0.5 to 5 mm, particularly preferably 1 to 4 mm.
Moreover, it is preferable that the bottom part dimension A of the convex part 5 along a X direction (column direction) is 2-30 mm, especially 2-5 mm, and the bottom part dimension B along a Y direction (direction orthogonal to a column direction) is 2-2 mm. It is preferably 30 mm, particularly 2 to 5 mm.
Moreover, it is preferable that the bottom area of the convex part 5 is 4-900 mm < ² >, especially 4-25 mm < ² >. The joining length C (see FIG. 3) of the joining part 4 in the X direction (column direction) is preferably 0.1 to 20 mm, particularly 0.5 to 5 mm, from the viewpoint of improving air permeability.

Next, the sanitary napkin which is 2nd Embodiment of the absorbent article of this invention is demonstrated with reference to FIG.
About 2nd Embodiment, the point which is different from 1st Embodiment mentioned above is demonstrated especially, the same code | symbol is attached | subjected about the same point, and description is abbreviate | omitted. The points described above with respect to the first embodiment are applied as appropriate to points that are not particularly described.

As shown in FIG. 6, the wing portion 7 in the napkin 1 ′ of the second embodiment is entirely composed of a three-dimensional sheet 10 ′ in the thickness direction. In the three-dimensional sheet 10 ′, the lower layer 3 includes an extended portion 31 a of the back sheet 31.
The three-dimensional sheet 10 ′ in the second embodiment also has the same configuration as the three-dimensional sheet 10 ′ used in the first embodiment, and the three-dimensional sheet 10 ′ is connected to the wing part 7 from the convex part 5 and the joint part 4. Are arranged so as to substantially coincide with the longitudinal direction of the napkin. Therefore, the wing part 7 bends preferentially along the longitudinal direction of the napkin 1 ′, and the same effect as the napkin 1 of the first embodiment is exhibited.

  The lower layer 3 in the second embodiment is made of a resin film. When the lower layer 3 is made of a resin film, it is possible to reduce the number of sheets forming the wing part 7, the thickness of the wing part becomes thinner, it becomes easier to bend along the product longitudinal direction, and operability is improved. improves. Moreover, since it is possible to reduce a nonwoven fabric material, it is advantageous in terms of cost. When the lower layer 3 is composed of a resin film, the resin film needs to have a leak-proofing property from the viewpoint of preventing menstrual blood or oozing from exuding and soiling the underwear. Furthermore, it is more preferable that the lower layer 3 has air permeability from the viewpoint of ensuring good air permeability in the vicinity of the skin contact surface and preventing the occurrence of stuffiness or the like. As such a leak-proof and breathable resin film, a porous film formed by uniaxially or biaxially stretching a sheet obtained by melt-molding a resin composition containing a thermoplastic resin and a filler such as calcium carbonate is used. Can be used.

As mentioned above, although 1st and 2nd embodiment of the absorbent article of this invention was described, this invention is not restrict | limited to said each embodiment, It can change suitably. For example, the convex portion 5 of the three-dimensional sheet 10 shown in FIG. 3 has a quadrangular pyramid shape, but the convex portion 5 may have another shape such as a hemispherical shape. In addition, the degree to which the convex portions 5 and the heat-sealing portions 4 in the adjacent rows are displaced in the X direction can be set to an arbitrary size such as 1/3 pitch or 1/4 pitch instead of 1/2 pitch. can do. Further, the joining portion in the three-dimensional sheet is not limited to the heat-sealed portion, and may be formed by joining the upper layer 2 and the lower layer 3 with an adhesive or other methods.
Further, the three-dimensional sheet may be disposed only in a part of the wing portion. For example, the vicinity of the base P of the wing portion 7 that serves as a bending portion when the wing portion 7 is bent along the side edge of the crotch portion (see FIG. 1)), the three-dimensional sheet 10 may be disposed only. As for the wing part in the sanitary napkin of 1st Embodiment, the substantially whole region of the skin contact surface is formed from the solid sheet 10. FIG.

Moreover, the wing part 7 in the absorbent article of this invention consists only of the solid sheet 10, as shown in FIG. 7, The extension part 31a of the back surface sheet 3 etc. on the non-skin contact surface side of this solid sheet 10 etc. The material which is not provided with the leak-proof material may be used.
In addition to the sanitary napkin, the absorbent article of the present invention may be a panty liner, an incontinence pad, or the like.

FIG. 1 is a perspective view showing a sanitary napkin which is an embodiment of the absorbent article of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is an enlarged perspective view showing a part of the three-dimensional sheet used in the sanitary napkin of FIG. FIG. 4 is a schematic view showing an example of a method for producing a three-dimensional sheet used in the sanitary napkin of FIG. FIG. 5 is a plan view showing a wing portion of the sanitary napkin of FIG. 1, and shows only a part of the convex portions. FIG. 6 is a sectional view showing a sanitary napkin according to another embodiment of the present invention, and is a view showing a section corresponding to FIG. FIG. 7 is a sectional view showing a sanitary napkin according to still another embodiment of the present invention, and is a view showing a section corresponding to FIG.

Explanation of symbols

1,1 'sanitary napkin (absorbent article)
10, 10 'Solid sheet 2 Upper layer 3 Lower layer 4 Joint part 5 Convex part 6 Absorbent body 7 Wing part

Claims (7)

In an absorbent article having a vertically long absorbent main body comprising an absorbent layer and a leak-proof layer, and a pair of wing portions provided on both sides of the absorbent main body,
On the skin contact surface side of the wing portion, an upper layer formed of a substantially non-stretchable nonwoven fabric and a lower layer formed of a substantially non-stretchable sheet-like material are partially joined to form a large number of joints. Consisting of a substantially non-stretchable three-dimensional sheet in which the part is formed,
In the three-dimensional sheet, the upper layer protrudes toward the wearer's skin side in a portion other than the joint portion to form a plurality of convex portions, and the convex portions and the joint portions are alternately and unidirectional. Are arranged in multiple rows, and the rows are arranged in multiple rows.When attention is paid to any one convex portion in one row, the left and right rows adjacent to the row A part of the joint and the convex part is located at a position adjacent to the two convex parts ;
The three-dimensional sheet is arranged such that the direction in which each row extends substantially coincides with the longitudinal direction of the absorbent article ,
The convex portion is a flat rectangular parallelepiped or truncated quadrangular pyramid having a rectangular bottom surface and rounded ridge lines, and has a height of 1 to 4 mm and a bottom dimension of 2 to 30 mm along the direction in which each row extends. The bottom dimension along the direction orthogonal to the direction in which each row extends is ² to 30 mm, and the bottom area is 4 to 25 mm ² .
The joints are rectangular, and in the adjacent rows, the joints are arranged with a half-pitch shift in the direction in which the rows extend,
Between the said adjacent row | line | column, the hollow which is depressed from the height position of the top part of the said convex part is formed continuously in the direction where this row | line extends, The said wing is made into the length direction of the said absorbent article An absorbent article , wherein the wing is bent along the depression when bent in a direction intersecting with the dent . The absorptive article according to claim 1 in which said lower layer consists of an extension part of a back sheet which forms said leak-proof layer, and said sheet-like object which constitutes this lower layer is a resin film . The absorbent article according to claim 1 or 2 , wherein the nonwoven fabric constituting the upper layer has an average fineness of constituent fibers of 0.1 to 5.0 dtex. The absorbent article according to any one of claims 1 to 3, wherein the nonwoven fabric constituting the upper layer includes crimped fibers. Nonwoven fabric constituting the upper layer is water-repellent, the absorbent article of any one of claims 1-4. The convex portions, the absorbent article of any one of claims 1 to 5 inside a cavity. The sheet constituting the lower layer is a resin film of the leak-barrier properties and breathability, the absorbent article of any one of claims 1-6.

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