JP6460930B2 - Absorbent articles - Google Patents

Description

  The present disclosure relates to absorbent articles.

For the purpose of providing an absorbent article having flexibility and excellent fit, an absorbent article including an absorbent body having a groove portion extending in a longitudinal direction and a transverse direction is known.
For example, Patent Document 1 discloses a vertically long absorbent article having a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets. The absorbent body has a high basis weight part having a relatively high basis weight and a low basis weight part having a relatively low basis weight adjacent to the high basis weight part, The low basis weight portion is unevenly distributed on the skin contact surface side in the thickness direction of the absorbent article, and the absorbent article is formed by the concave depression of the top sheet and the absorbent body and the absorbent article. It has a groove extending in the longitudinal direction of the article, and the groove is formed across the high basis weight part and the low basis weight part, and is recessed relatively shallowly in the groove. Shallow groove portions and deep groove portions that are recessed relatively deeply are alternately formed along the length direction of the groove, and the shallow groove portions are formed in the deep groove portions. And the length direction of the length of said groove is described long absorbent article.

JP 2012-245130 A

In the absorbent article described in Patent Literature 1, since the groove portion of the absorbent body is held before the liquid is absorbed, the absorbent article has appropriate flexibility with the groove portion of the absorbent body as a base point, and is excellent in fit. However, after absorbing the liquid, particularly after absorbing the liquid a plurality of times, the absorbent body expands due to the absorbed liquid, the width of the groove portion becomes narrow, and in some cases, the width of the groove portion becomes narrow, Since the groove part almost disappeared, the flexibility with the groove part as a base point was lowered, and the fit was sometimes inferior.
Therefore, this indication aims at providing the absorptive article which is excellent in fit nature in both before absorbing a liquid, and after absorbing a liquid, and is excellent in rewetting nature and wearing feeling.

  The present disclosure is an absorbent article including an absorbent body having a longitudinal direction, a short side direction, and a thickness direction, wherein the absorbent body has one surface and the other surface, and the absorbent core. A core wrap disposed on at least one of the surfaces, wherein the absorbent core is a groove that is recessed from the one surface and extends in the longitudinal direction and has a bottom, and has an average basis weight of the absorbent core A longitudinal groove having a smaller basis weight and a groove having a bottom that is recessed from the one surface or the other surface and extends in the lateral direction, and is smaller than the average basis weight of the absorbent core The present invention has found an absorbent article comprising a short-side groove portion having a basis weight, wherein the core wrap is joined to a bottom portion of the longitudinal groove portion.

  The absorbent article of the present disclosure is excellent in fit before absorbing the liquid and after absorbing the liquid, excellent in rewetting, and excellent in wearing feeling.

FIG. 1 is a plan view of an absorbent article 1 according to the first embodiment. FIG. 2 is a plan view of the absorbent body 7 of the absorbent article 1 according to the first embodiment. FIG. 3 is a plan view of the absorbent core 9 of the absorbent article 1 according to the first embodiment. FIG. 4 is a perspective view showing the absorbent body 7 and the absorbent core 9 of the absorbent article 1 according to the first embodiment. FIG. 5 is an end view of the VI end surface of FIG. 6 is an end view taken along the VI-VI end face of FIG. FIG. 7 is an end view of the VII-VII end face of FIG. FIG. 8 is a view for explaining a state in which the absorbent article 1 according to the first embodiment has absorbed a liquid. FIG. 9 is an end view of the IX-IX end face of FIG. Drawing 10 is a figure for explaining an absorptive article which does not have a pressing part in a longitudinal direction slot. FIG. 11 is a plan view of the diffusion sheet 13 having a plurality of longitudinal slits 41. FIG. 12 is a diagram for explaining a front waistline region, a back waistline region, and a crotch region of a tape-type disposable diaper.

[Definition]
[Fitness]
In this specification, the fact that the absorbent article fits the wearer's body is referred to as excellent fit.
[Rewet property]
In the present specification, the fact that the absorbed liquid is difficult to return to the wearer side from the liquid-permeable sheet is referred to as being excellent in rewetting.

[Longitudinal and transverse direction]
In this specification, the “longitudinal direction” and the “short direction” related to the absorber may be referred to as the direction of the longitudinal axis of the absorber and the axis perpendicular to the longitudinal axis (hereinafter referred to as “short axis”), respectively. ) Direction.

[Longitudinal groove and its width direction]
In the present specification, the “longitudinal groove portion” extending in the longitudinal direction means not only a groove portion extending in a direction parallel to the direction of the longitudinal axis but also a groove portion extending generally in the longitudinal axis direction. The longitudinal groove can extend linearly, non-linearly, for example curved.
In the present specification, the width direction of the longitudinal groove portion means a direction orthogonal to the direction in which the longitudinal groove portion extends. In addition, the length in the width direction of the longitudinal groove is sometimes simply referred to as “width of the longitudinal groove”.

[Short direction groove and its width direction]
In the present specification, the “short-side groove portion” extending in the short-side direction means not only a groove portion extending in a direction parallel to the short-axis direction but also a groove portion extending generally in a direction parallel to the short-axis direction. To do. The short-side groove can extend linearly, non-linearly, for example, curved.
In this specification, the width direction of the short direction groove part means a direction orthogonal to the direction in which the short direction groove part extends. Further, the length in the width direction of the short direction groove may be simply referred to as “width of the short direction groove”.

[Front waistline area, back waistline area, and crotch area]
In the present specification, “front waist area”, “rear waist area”, and “crotch area” are terms used when the absorbent article is a disposable diaper, and their significance is It is as follows.
[Pants-type disposable diapers]
In the pants-type disposable diaper, the front waistline region means a region sandwiched between a pair of joints that join the front body and the back body among the front body, and the back waistline region is the above of the back body It means a region sandwiched between a pair of joints.

  In the pants-type disposable diaper, the crotch region means a region between the front waistline region and the back waistline region. The crotch region also corresponds to a region sandwiched between a pair of leg hole openings (reference numeral 117 in FIG. 12).

[Tape-type disposable diapers]
In the tape-type disposable diaper, as shown in FIG. 12, in the state where the tip 110 of the pair of tape fasteners 109 is adjacent to the predetermined fixing region 111 for the tape fastener, the waistline region And a crotch region.

  Specifically, the waistline region (FW + RW) is a state where the waistline forming member 113 of the front body and the waistline forming member 114 of the back body of the disposable diaper 1 ′ are overlapped in the fixed state as described above. The determination is made based on the pair of overlapping portions 115. The front waistline region FW means a region between the pair of overlapping portions 115 in the front body of the disposable diaper 1. Similarly, the rear waistline region RW means a region between the pair of overlapping portions 115 in the back body of the disposable diaper 1 ′. The crotch region (C) means a region between the front waistline region FW and the back waistline region RW.

The present disclosure relates to the following aspects.
[Aspect 1]
An absorbent article comprising an absorbent body having a longitudinal direction, a transverse direction and a thickness direction,
The absorber comprises an absorbent core having one surface and the other surface, and a core wrap disposed on at least one surface side of the absorbent core,
The absorbent core is recessed from the one surface and extends in the longitudinal direction, and has a bottom portion, the longitudinal groove portion having a basis weight smaller than the average basis weight of the absorbent core, and the one A groove portion having a bottom portion that is recessed from the surface or the other surface and extends in the short-side direction, and has a short-side groove portion having a basis weight smaller than an average basis weight of the absorbent core, and the core wrap. Is joined to the bottom of the longitudinal groove,
The said absorbent article characterized by the above-mentioned.

  The absorbent article according to the aspect 1 is excellent in fit property both before absorbing the liquid and after absorbing the liquid repeatedly. In the absorbent article according to aspect 1, the absorbed liquid is spread and absorbed in a wide range of the absorbent body by spreading in the longitudinal direction by the longitudinal groove and spreading in the lateral direction by the short groove. The liquid is absorbed over a wide area of the absorber, so it has excellent rewetting properties. Therefore, the absorbent article according to aspect 1 has an effect of being excellent in wearing feeling.

[Aspect 2]
The absorbent article according to aspect 1, wherein the longitudinal groove portion has a length in the width direction that is 0.5 to 3.0 times the thickness of the absorber.
In the absorbent article according to aspect 2, the longitudinal groove portion tends to retain its shape, particularly the width, even after repeatedly absorbing the liquid. As a result, the fit is excellent both before absorbing the liquid and after repeatedly absorbing the liquid. Moreover, since the absorbed liquid diffuses through the longitudinal groove portion and the short-side groove portion, the absorbed liquid is absorbed in a wide range of the absorber, and the rewetting property is excellent. Therefore, the absorbent article according to aspect 2 has an effect of being excellent in wearing feeling.

[Aspect 3]
The said absorber is a pressing part by which the part which overlaps with the said center part and the said thickness direction among the center part of the said longitudinal direction groove part and the said core wrap was squeezed, Comprising: Continuously along the said longitudinal direction groove part Or the absorbent article of the aspect 1 or 2 provided with the pressing part extended intermittently.
In the absorbent article according to Aspect 3, the absorbent body has a squeezed portion formed by squeezing the absorbent core and the core wrap in the longitudinal groove portion. As a result, even after absorbing the liquid, the core wrap 11 stays in the longitudinal groove, and the shape, particularly the width and depth of the core wrap 11 can be easily maintained. Therefore, the absorbent article according to aspect 3 is particularly excellent in fit after absorbing liquid.

[Aspect 4]
The absorbent body further includes a core wrap disposed on the other surface side of the absorbent core, and the compressed portion is disposed on the central portion of the core wrap, the one surface, and the other surface side. Among these, the absorbent article of aspect 3 which is pressing the said center part and the part which overlaps in the said thickness direction.
In the absorbent article according to aspect 4, the absorbent body includes an absorbent core and core wraps disposed on one surface side and the other surface side of the absorbent core, and the compressed portion includes a central portion and the one side Since the core wrap arranged on the surface and the other surface side is squeezed along the longitudinal groove, the longitudinal groove has its shape, particularly its width and Easy to keep the depth. As a result, the absorbent article has excellent fit properties both before absorbing the liquid and after absorbing the liquid repeatedly. In addition, the absorbed liquid diffuses in the longitudinal direction through the longitudinal groove, and diffuses in the lateral direction through the short groove, so that the absorbed liquid is absorbed in a wide range of the absorbent body, making it rewet. Excellent. Therefore, the absorbent article according to aspect 4 has an effect of being excellent in wearing feeling.

[Aspect 5]
The absorber further includes a diffusion sheet disposed between the one surface of the absorbent core and the core wrap, or on the surface of the core wrap opposite to the one surface of the absorbent core. In aspect 3 or 4, the squeezing part squeezes the central part of the longitudinal groove part, the core wrap, and the diffusion sheet overlapping with the central part in the thickness direction. The absorbent article as described.

  In the absorbent article according to the fifth aspect, the liquid that has reached the absorber quickly moves to the longitudinal groove by the diffusion sheet. In addition, the liquid that has reached the longitudinal groove is quickly diffused in the longitudinal direction of the absorbent by the diffusion sheet present in the longitudinal groove, and is quickly absorbed in a wide range of the absorbent, thereby making the absorbent article rewet. Excellent. Moreover, since the diffusion sheet is joined to the bottom of the longitudinal groove by the pressing part, the longitudinal groove has its shape, particularly its width, even after the absorbent article (absorber) has repeatedly absorbed the liquid. Even after the absorbent article has repeatedly absorbed the liquid, the absorbent article is excellent in fit. Therefore, the absorbent article according to aspect 5 has an effect of being excellent in wearing feeling.

[Aspect 6]
The diffusion sheet is a first fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, a second fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, and pulp therebetween. The absorbent article according to aspect 5, which is a laminated sheet comprising a pulp fiber layer containing

  In the absorbent article according to aspect 6, since the diffusion sheet has a specific configuration and is excellent in performance of diffusing liquid, the absorbed liquid diffuses over a wide area of the absorber and is absorbed over a wide area of the absorber. Therefore, after the absorbent article repeatedly absorbs the liquid, the absorbent article is excellent in rewetting. Therefore, the absorbent article according to Aspect 6 has an effect of excellent rewetting.

[Aspect 7]
The absorbent article according to aspect 5 or 6, wherein the diffusion sheet has a plurality of slit portions penetrating in the thickness direction.
In the absorbent article according to aspect 7, since the core wrap and the diffusion sheet are joined to the bottom of the longitudinal groove of the absorber, that is, enter the longitudinal groove, the rigidity of the longitudinal groove of the absorber is In particular, the absorber tends to be high after repeatedly absorbing the liquid. Therefore, when the diffusion sheet has a plurality of slit portions, the rigidity of the diffusion sheet itself and the longitudinal groove portion is reduced, and the absorbent article is excellent in fit. Therefore, the absorbent article according to aspect 7 has an effect of being excellent in fit.

[Aspect 8]
The absorber is partitioned into one end side region, the other end side region, and a central region therebetween by an imaginary line that divides the absorber into three equal parts in the lateral direction, and the absorber is the longitudinal Absorbent article as described in any one of aspects 1-7 which equips all the said one end side area | regions, an other end side area | region, and a center area | region with a direction groove part.

  In the absorbent article according to Aspect 8, since the longitudinal grooves are arranged in a wide range of the absorbent body, the absorbent article has good fit before absorbing liquid and after absorbing liquid repeatedly. Excellent. Moreover, since the absorbed liquid is diffused in a wide range of the absorbent body through the longitudinal groove and is absorbed in a wide range of the absorbent body, the absorbent article is excellent in rewetting. Therefore, the absorbent article according to aspect 8 has an effect of being excellent in wearing feeling.

[Aspect 9]
The absorbent article is partitioned into three regions, a front waistline region, a back waistline region, and a crotch region therebetween, in the longitudinal direction, and the absorbent body is disposed over the three regions. The absorbent article according to any one of aspects 1 to 8, wherein the absorbent body includes the short-side groove portion in all the three regions.

  In the absorbent article according to the ninth aspect, since the short-side groove portion is disposed in a wide range of the absorbent body, the absorbent article absorbs the liquid before and after repeatedly absorbing the liquid in the longitudinal direction. Excellent fit. In addition, the absorbed liquid diffuses over a wide range of the absorbent body through the short-side groove and is absorbed over a wide range of the absorbent body, so that the absorbent article is excellent in rewetting. Therefore, the absorbent article according to aspect 9 has an effect of being excellent in wearing feeling.

[Aspect 10]
Absorption according to any one of aspects 1 to 9, wherein the core wrap is not joined to the bottom of the short-side groove in a portion of the short-side groove that does not intersect with the long-side groove. Sex goods.
In the absorbent article according to aspect 10, the absorbed liquid diffuses through the longitudinal groove in the longitudinal direction of the absorbent body, and then the liquid present in the longitudinal groove transmits the core wrap, It diffuses in the short direction of the absorber through the short direction groove between the absorbent core. As a result, the absorbed liquid is quickly diffused over a wide range of the absorbent body and is absorbed over a wide range of the absorbent body, so that the absorbent article is excellent in rewetting. Therefore, the absorbent article according to Aspect 10 has an effect of excellent rewetting.

[Aspect 11]
The absorbent article according to any one of aspects 1 to 10, wherein the absorbent core includes the short-side groove portion on the one surface, and the one surface is a skin side surface.
In the absorbent article according to aspect 11, the liquid that has reached the absorber is quickly diffused over a wide area of the absorber through the longitudinal groove and the short-side groove, and is quickly absorbed over a wide area of the absorber. Therefore, the absorbent article is excellent in rewetting. Moreover, since an absorber becomes easy to deform | transform along a wearer's body three-dimensional shape on the basis of a longitudinal direction groove part and a transversal direction groove part, an absorbent article is excellent in fit property. Therefore, the absorbent article according to aspect 11 has an effect of being excellent in wearing feeling.

[Aspect 12]
The absorbent article according to any one of aspects 1 to 11, wherein a region including the absorbent body of the absorbent article has a bending rigidity value of 20 to 50 mN · m in the longitudinal direction and the short side direction.
The absorbent article according to aspect 12 is excellent in flexibility because it has a predetermined bending rigidity. Therefore, the absorbent article according to aspect 12 has an effect of being excellent in fit.

The absorbent article of the present disclosure will be described in detail below.
FIGS. 1-7 is a figure for demonstrating the absorbent article 1 according to one (1st Embodiment) of the embodiment of this indication, specifically, a disposable diaper. Specifically, FIG. 1 is a plan view of the absorbent article 1 according to the first embodiment. FIG. 2 is a plan view of the absorbent body 7 of the absorbent article 1 according to the first embodiment. FIG. 3 is a plan view of the absorbent core 9 of the absorbent article 1 according to the first embodiment. FIG. 4 is a perspective view showing the absorbent body 7 and the absorbent core 9 of the absorbent article 1 according to the first embodiment. 5 to 7 are end views of the VV end face, the VI-VI end face, and the VII-VII end face in FIG. 2, respectively.

As shown in FIG. 1, the absorbent article 1 shown in the first embodiment is a liquid-permeable sheet 3, a liquid-impermeable sheet 5, a liquid-permeable sheet 3, and a liquid-impermeable sheet 5. The absorber 7 is included.
As shown in FIG. 2, the absorbent body 7 has a longitudinal L _O and lateral directions L _A, the absorbent core 9 having a skin side 15 and garment side 17, the skin side surface 15 side of the absorbent core 9 The core wrap 11 disposed and the core wrap 11 ′ disposed on the side of the clothing side surface 17 (specifically, the core wrap 11 covering the skin side surface 15 of the absorbent core 9 and the core wrap 11 ′ covering the clothing side surface 17); The diffusion sheet 13 arrange | positioned between the skin side surface 15 and the core wrap 11 arrange | positioned at the skin side surface 15 side is provided.
In the first embodiment, the absorbent article 1 has the same longitudinal direction L _O and short direction L _A as the absorbent body 7.

As shown in FIGS. 3 to 6, the absorbent core 9 is a groove that is recessed from the skin side surface 15 in the thickness direction of the absorbent core 9 and extends in the longitudinal direction L _O , and has an average basis weight of the absorbent core 9. A longitudinal groove 19 comprising a low basis weight region 19a having a basis weight smaller than the amount is provided.

As shown in FIGS. 3, 4, 6, and 5, the absorbent core 9 is a groove that is recessed from the skin side surface 15 in the thickness direction of the absorbent core 9 and extends in the short direction L _A. , And a short-side groove 21 composed of a low basis weight region 21 a having a basis weight smaller than the average basis weight of the absorbent core 9.
As shown in FIGS. 2 to 4, each of the lateral direction groove portions 21 intersects with the plurality of longitudinal direction groove portions 19 and is arranged so as to connect them.

  As shown in FIGS. 2 to 6, the longitudinal groove portion 19 includes a central portion 24 in the width direction of the longitudinal groove portion 19, a core wrap 11 disposed on the skin side surface 15 side of the absorbent core 9, and the absorbent core 9. The core wrap 11 ′ arranged on the clothing side surface 17 side includes a squeezed portion 23 that is intermittently squeezed in the thickness direction of the absorbent body 7 and along the longitudinal axis of the longitudinal groove portion 19.

  As shown in FIGS. 5 and 6, in the longitudinal groove portion 19, the core wrap 11 disposed on the skin side surface 15 side of the absorbent core 9 is the bottom portion 20 of the longitudinal groove portion 19, more specifically, the diffusion sheet 13. Is bonded to the absorbent core 9 at the bottom 20 of the longitudinal groove 19. In the longitudinal groove 19, the diffusion sheet 13 is joined to the bottom 20 of the longitudinal groove 19, more specifically, to the absorbent core 9 at the bottom 20 of the longitudinal groove 19. The pressing unit 23 includes two core wraps 11 (a core wrap 11 disposed on the skin side surface 15 side of the absorbent core 9 and a core wrap 11 ′ disposed on the clothing side surface 17 side of the absorbent core 9), a diffusion sheet 13, It is formed by squeezing the absorbent core 9 (the central portion 24 in the width direction of the longitudinal groove portion 19).

As shown in FIG. 2, the absorber 7 is divided into the right region RA, the left region LA, and the right side by two virtual lines VL ₁ and VL _{2 that} equally divide the absorber 7 in the short direction L _A. The absorbent body 7 is partitioned into a region RA and a central region CA of the left region LA, and the absorbent body 7 includes the longitudinal grooves 19 in all of the right region RA, the left region LA, and the central region CA.

As shown in FIG. 1 and FIG. 2, the absorbent article 1 includes a front waistline region RW, a back waistline region LW, a front waistline region RW, and a back waistline region LW in the longitudinal direction L _O. The crotch region C is divided into three regions, and the absorbent body 7 is arranged over the three regions. The absorber 7 includes the short-side groove 21 in all three regions.

  In 1st Embodiment, as FIG.6 and FIG.7 shows, in the part which does not cross | intersect the longitudinal direction groove part 19 among the short direction groove parts 21, the core wrap arrange | positioned at the skin side surface 15 side of the absorption core 9 11 and the diffusion sheet 13 are not joined to the bottom 22 of the short-side groove 21. That is, a portion of the short-side groove portion that does not intersect with the longitudinal groove portion 19 is formed between the absorbent core 9 and the core wrap 11 and the diffusion sheet 13 disposed on the skin side surface 15 side of the absorbent core 9. ing.

  In the first embodiment, as shown in FIG. 1, the absorbent article 1 includes a pair of leak-proof walls 101 including an elastic member 103 and fixing for fixing the leak-proof walls 101 to the liquid-permeable sheet 3. The portion 105, the elastic member 107, the tape fastener 109, and the like are included, and these are well-known in the art, and thus description thereof is omitted.

The first embodiment will be used to explain that the absorbent article of the present disclosure is excellent in fit before absorbing the liquid and after absorbing the liquid, excellent in rewetting, and excellent in wearing feeling.
FIG. 8 is a view for explaining a state in which the absorbent article 1 according to the first embodiment has absorbed a liquid, and corresponds to FIG. 2. FIG. 9 is an end view of the IX-IX end face of FIG.

As shown in FIG. 8, the liquid 31 that has reached the absorber 7 forms a liquid 33 absorbed by the absorber as follows.
(I) The liquid 31 that has reached the absorbent body 7 diffuses in the longitudinal direction L _O of the absorbent body 7 through the longitudinal groove 19 on the skin side surface 15 of the absorbent body 7.
(Ii) The liquid 31 diffused in the longitudinal direction L _O passes through the core wrap 11 and the diffusion sheet 13 disposed on the skin side surface 15 side of the absorbent core 9 and penetrates into the absorbent body 7.
(Iii) The short-direction groove 21 formed between the absorbent core 9 and the core wrap 11 and the diffusion sheet 13 disposed on the skin side surface 15 side of the absorbent core 9 is the liquid 31 that has penetrated into the absorbent body 7. And diffuse in the short direction L _A of the absorber 7.
(Iv) The liquid 31 diffused in the longitudinal direction L _O and the short direction L _A is absorbed by the absorbent core 9 to form the absorbed liquid 33.

  The longitudinal groove portion 19 is composed of a low basis weight region 19a, and the longitudinal groove portion 19 includes a core wrap 11 disposed on the skin side surface 15 side of the absorbent core 9, the diffusion sheet 13, the absorbent core 9, and the absorbent core. There is a squeezed portion 23 in which the core wrap 11 ′ disposed on the clothing side face 17 side of 9 is squeezed. Therefore, even after the longitudinal groove portion 19 has absorbed the liquid, the core wrap 11 and the diffusion sheet 13 disposed on the skin side surface 15 side of the absorbent core 9 remain in the longitudinal groove portion 19, and its shape, particularly its Easy to maintain width and depth. Moreover, even if the absorbent article 1 absorbs liquid repeatedly, the longitudinal groove 19 tends to maintain its shape, particularly its width and depth.

  Accordingly, even when the absorbent article 1 repeatedly absorbs the liquid, the liquid 31 that has reached the absorber 7 diffuses through the longitudinal groove portion 19 over a wide range of the absorber 7, and Absorbed over a wide area. As a result, in the absorbent article 1, the liquid absorbed by the absorbent body 7 is unlikely to return to the surface of the liquid permeable sheet 3 and is excellent in rewetting.

Moreover, the longitudinal direction groove part 19 is easy to hold | maintain the shape even after the absorbent article 1 absorbs a liquid repeatedly as above-mentioned. Therefore, the absorbent article 1 is easily bent not only before absorbing the liquid but also after repeatedly absorbing the liquid, and is easy to bend with the longitudinal groove 19 as a base point, and has excellent fit.
As described above, the absorbent article 1 is excellent in wearing feeling both before absorbing the liquid and after absorbing the liquid, particularly after repeatedly absorbing the liquid.

  Drawing 10 is a figure for explaining an absorptive article which does not have a pressing part in a longitudinal direction slot. FIG. 10 is an end view corresponding to the IX-IX end face of FIG. The absorbent article shown in FIG. 10 is the same as that of the first embodiment except that the longitudinal groove portion does not have a pressing portion.

As shown in FIG. 10, in an absorbent article that does not have a compressed portion in the longitudinal groove 19, when the absorbent body 7 absorbs liquid, the width of the longitudinal groove 19 corresponds to the amount of absorbed liquid. Since it becomes narrower or almost disappears, the liquid that has reached the absorber 7 does not easily diffuse through the longitudinal groove 19 in the longitudinal direction L _O of the absorber 7.
Further, in the absorbent article, when the absorbent body 7 absorbs the liquid, the width of the longitudinal groove portion 19 becomes narrower or almost disappears, so that the absorbent article is not easily bent from the longitudinal groove portion 19 as a base point. As the liquid is absorbed, it becomes less fit.

In the first embodiment, the longitudinal groove is formed on the skin side surface of the absorbent core. However, in the absorbent article of the present disclosure, the longitudinal groove is formed on one surface of the absorbent core. As said one surface, the skin side surface or clothing side surface of an absorption core is mentioned.
By forming the longitudinal groove part on the clothing side surface of the absorbent core, the liquid that has reached the clothing side surface of the absorbent core is likely to diffuse in the longitudinal direction through the longitudinal groove part.

  In the first embodiment, the short-side groove portion is formed on the skin side surface of the absorbent core. However, in the absorbent article of the present disclosure, the short-side groove portion is formed on one surface or the other surface of the absorbent core. Has been. Examples of the one surface and the other surface include the skin side surface and the clothing side surface of the absorbent core, and the clothing side surface and the skin side surface of the absorbent core.

Because the short-side groove is on the same plane as the long-side groove (the short-side groove is on one surface of the absorbent core), the liquid diffused in the longitudinal direction through the longitudinal groove can be quickly The liquid can be absorbed in a wide range of the absorber by diffusing in the short direction.
Due to the presence of the short-side groove portion on a different surface from the long-side groove portion (the short-side groove portion is present on the other surface of the absorbent core), diffusion in the longitudinal direction through the longitudinal groove portion on one surface The liquid can be diffused in the lateral direction through the lateral groove on the other side and then absorbed by the absorber.

  In the first embodiment, the longitudinal groove portion 19 is intermittently disposed in the width direction of the longitudinal groove portion 19 and the core wrap 11 in the thickness direction of the absorbent body 7 and along the longitudinal axis of the longitudinal groove portion 19. The compressed part which was squeezed automatically is included. By doing so, a wearer becomes difficult to feel the hardness of a pressing part.

In the absorbent article of the present disclosure, when the absorbent body has the above-described compressed portion, when the basis weight of the longitudinal groove portion is 0 g / m ² , the compressed portion is a core wrap at the central portion of the longitudinal groove portion. It is formed by squeezing. Moreover, in the case where the absorbent body of the absorbent article of the present disclosure has the above-described compressed portion, when the basis weight of the longitudinal groove portion is 0 g / m ² , the absorbent body is one side of the absorbent core and the absorbent core. And the core wrap disposed on the other surface side, and the squeezing portion is formed by squeezing the core wrap disposed on one surface and the other surface side of the absorbent core in the central portion of the longitudinal groove portion. It is preferable. This is from the viewpoint of the effect of the present disclosure.

  In an absorbent article according to another embodiment of the present disclosure, the core wrap is joined to the bottom of the longitudinal groove, for example, with an adhesive. By doing so, even after the absorber has absorbed, the core wrap joined to the bottom of the longitudinal groove part suppresses the narrowing of the width of the longitudinal groove part, and the shape of the longitudinal groove part is maintained. .

In addition, in the absorbent article of this indication, when the basic weight of a longitudinal direction groove part is 0 g / m < ² >, the bottom part of a longitudinal direction groove part means the material which exists in the other surface side of an absorption core. Moreover, in the absorbent article of the present disclosure, when the basis weight of the longitudinal groove portion is 0 g / m ² , the absorbent body is disposed on the absorbent core and one surface and the other surface side of the absorbent core. It is preferable that the core wrap having the core wrap and disposed on the one surface side in the longitudinal groove is joined to the core wrap disposed on the other surface side by, for example, an adhesive. This is from the viewpoint of the effect of the present disclosure.

  In the absorbent article according to another embodiment of the present disclosure, the longitudinal groove portion includes a squeezed portion in which the central portion in the width direction of the longitudinal groove portion and the core wrap are continuously squeezed in the longitudinal direction. By doing so, an absorptive article becomes easy to bend on the basis of a longitudinal direction slot, and is excellent in fit nature.

  In the absorbent article of the present disclosure, the longitudinal groove is preferably 0.5 to 3.0 times, more preferably 0.8 to 2.5 times, and even more preferably 1.0 times the thickness of the absorber. It has a length in the width direction of up to 2.0 times. The above range is preferable from the viewpoint that the longitudinal groove can retain its shape, particularly its width, after the absorbent article has absorbed the liquid.

In the present specification, the thickness (mm) of the absorber is measured as follows.
FS-60DS [measurement surface 44 mm (diameter), measurement pressure 3 g / cm ² ] manufactured by Daiei Kagaku Seisakusho Co., Ltd. is prepared and absorbed under standard conditions (temperature 23 ± 2 ° C., relative humidity 50 ± 5%). Pressurize five different parts of the body, measure the thickness of each part 10 seconds after pressurization, and take the average of the five measured values as the thickness of the absorber.

In the absorbent article of the present disclosure, the central portion in the width direction of the longitudinal groove portion preferably includes the longitudinal axis of the longitudinal groove portion, and preferably does not include both ends in the width direction of the longitudinal groove portion. This is from the viewpoint that the absorber can easily retain its shape after absorbing the liquid.
The length in the width direction of the central portion is preferably 30 to 90%, more preferably 40 to 80%, and still more preferably 50 to 70% of the length in the width direction of the longitudinal groove portion. From the above viewpoint.

  In 1st Embodiment, the pressing part 23 is the core wrap 11 arrange | positioned at the skin side surface 15 side, the diffusion sheet 13, the center part 24 of the absorption core 9, and the core wrap 11 'arrange | positioned at the clothing side surface 17 side. Although formed by squeezing, in an absorbent article according to another embodiment of the present disclosure, the squeezed portion is formed by squeezing only the central portion of the absorbent core, and another embodiment of the present disclosure Accordingly, in the absorbent article, the squeezed part is formed by squeezing the central part of the absorbent core and the core wrap (one face, for example, the core wrap disposed on the skin side or clothing side).

In the first embodiment, the absorber 7, the longitudinal groove 19, in the lateral direction L _A, provided to all areas of the right area RA, left area LA and the central region CA. By doing so, the liquid 31 that has reached the absorber 7 is diffused over a wide range of the absorber 7 and is easily absorbed over a wide range of the absorber 7, and the absorbed liquid returns from the surface of the liquid-permeable sheet 3. It becomes difficult. Moreover, the absorbent article 1 is excellent in fit property both before and after absorbing the liquid. As a result, the absorbent article 1 is excellent in wearing feeling.

In the first embodiment, the absorbent body 7 includes the short-side groove 21 in three regions including a front waistline region RW, a back waistline region LW, and a crotch region C. By doing so, the absorbent article 1 is excellent in the longitudinal fit. Further, since the liquid diffused in the longitudinal direction L _O through the longitudinal groove portion 19 diffuses in the lateral direction L _A through the lateral groove portion 21, and is absorbed in a wide range of the absorbent body 7, the absorbent article 1 is excellent in rewetting. As a result, the absorbent article 1 is excellent in wearing feeling.

  In 1st Embodiment, the core wrap 11 arrange | positioned at the skin side surface 15 side of the absorption core 9 in the part which does not cross | intersect the longitudinal direction groove part 19 among the short direction groove parts 21, the bottom part 22 of the short direction groove part 21 In the absorbent article according to another embodiment of the present disclosure, the core wrap is bonded to the bottom of the short-side groove. By doing so, the liquid that has reached the absorber 7 easily diffuses in the short direction through the short direction groove. In addition, even after the absorbent article has absorbed the liquid, the short-side groove portion easily maintains its shape, and the liquid that has reached the absorber 7 diffuses in the short-side direction through the short-side groove portion. It becomes easy to do. Furthermore, even after the absorbent article has absorbed the liquid, the absorbent article is easily deformed in the longitudinal direction along the wearer's body. As a result, the absorbent article is excellent in fit and rewetting, and is excellent in wearing feeling.

  In order to join the core wrap to the bottom portion of the short-side groove portion, for example, the short-side groove portion includes a central portion in the width direction of the short-side groove portion and a core wrap disposed on at least one surface side of the absorbent core. Forming the pressing part formed by pressing in the thickness direction of an absorber and along a transversal direction groove part is mentioned.

  In the absorbent article according to still another embodiment of the present disclosure, the short-side groove portion includes a central portion in the width direction of the short-side groove portion and a core wrap disposed on at least one surface side of the absorbent core. The pressing part formed by pressing in the thickness direction and along a transversal direction groove part is included. By doing so, a transversal direction groove part has a function similar to a longitudinal direction groove part, and an absorptive article is excellent in fit property and rewetting property, and is excellent in a feeling of wear.

  In the first embodiment, the core wraps 11 and 11 ′ are disposed on the skin side surface 15 and the clothing side surface 17 side of the absorbent core 9, respectively, but in the absorbent article according to another embodiment of the present disclosure, the absorbent body is The absorbent core and the core wrap disposed on one surface side of the absorbent core are included, and the core wrap disposed on the other surface side of the absorbent body is not included.

  In 1st Embodiment, although the diffusion sheet 13 is arrange | positioned between the skin side surface 15 of the absorption core 9, and the core wrap 11 arrange | positioned at the skin side surface 15 side of the absorption core 9, another implementation of this indication In the form, the diffusion sheet is disposed on the surface of the core wrap opposite to the one surface of the absorbent core, that is, outside the core wrap. By doing so, since the liquid diffused in the longitudinal direction of the absorbent article through the longitudinal groove portion comes into direct contact with the diffusion sheet, the liquid diffusion rate tends to increase.

In an absorbent article according to another embodiment of the present disclosure, a diffusion sheet is disposed between the other side of the absorbent core and the core wrap, and in an absorbent article according to yet another embodiment of the present disclosure, a diffusion A sheet is disposed on the surface of the core wrap opposite to the other surface of the absorbent core. An absorbent article according to yet another embodiment of the present disclosure does not include a diffusion sheet.
In those embodiments, since there is no diffusion sheet in the longitudinal groove, the diffusion sheet is less likely to form a three-dimensional structure along the depression of the longitudinal groove, and the absorbent article tends to be hard.

  The said diffusion sheet aims at reducing the rigidity of an absorbent article, and may have a some slit part penetrated in the thickness direction of a diffusion sheet. This is because when the diffusion sheet has the slit portion, the slit portion is deformed (opened) when the diffusion sheet is joined to the bottom portion of the longitudinal groove portion by the pressing portion or the like, and the distortion of the absorber is reduced.

As the slit portion, a linear slit portion, for example, a slit portion extending in the longitudinal direction of the absorbent article, a slit portion extending in the short direction of the absorbent article, a non-linear slit portion, for example, a cross-shaped slit Part, a curved slit part, and the like.
From the viewpoint of reducing the distortion formed in the longitudinal groove, a slit part extending in the longitudinal direction of the absorbent article is preferable, and from the viewpoint of reducing the distortion formed in the lateral groove, the short of the absorbent article. A slit portion extending in the hand direction is preferable.
FIG. 11 is a plan view of the diffusion sheet 13 having a plurality of longitudinal slits 41.

  In the absorbent article of the present disclosure, the region including the absorbent body of the absorbent article preferably has a bending rigidity value of 20 to 50 mN · m, and more preferably 25 to 45 mN · m in the longitudinal direction and the short side direction. Have. When the bending stiffness value is in the above-described range, the absorbent article is easily deformed along the wearer's body, is excellent in fit, and is excellent in wearing feeling.

In this specification, the bending stiffness is measured as follows.
(1) An Imada torque tester, EX-0762, is prepared in a constant temperature and humidity chamber (20 ± 2 ° C., 60 ± 5% RH). The load cell is set to 50N for tension and compression, and the torque is set to 1N.
(2) Cut the sample as shown in Table 1.
(3) A cloth tape of 50 mm × 20 mm in size is attached to both ends of the sample in the measurement direction so that the jig interval is as shown in Table 1 so that the longitudinal direction is perpendicular to the measurement direction. Grip portions are formed at both ends in the measurement direction.
(4) A sample is attached to a jig, the sample is rotated under the conditions described in Table 1, and the maximum torque value (mN · m) is measured.
(5) The measurement is performed 5 times with different samples, and the average value thereof is adopted as the bending stiffness value.

  In the absorbent article of the present disclosure, as the absorbent core and the core wrap, those normally used in the art can be adopted without particular limitation. Examples of the absorbent core include pulp fibers and superabsorbent polymers, and examples of the core wrap include tissue.

In the absorbent article of the present disclosure, the absorbent core preferably 100 to 400 g / m ^2, and more preferably has an average basis weight of 200-30Og / m ^2.
Each of the longitudinal direction groove portion and the short direction direction groove portion which is a low basis weight region preferably has a basis weight of 80% by mass or less, more preferably 60% by mass or less, and still more preferably 40% by mass or less of the average basis weight. Have This is from the viewpoint of the effect of the present disclosure. Each of the longitudinal groove portion and the transverse groove portion, which are low basis weight regions, has a basis weight of preferably 5% or more, more preferably 10% or more, and even more preferably 20% or more of the average basis weight. This is from the viewpoint of maintaining the structure as an absorber.
In addition, each of the longitudinal direction groove part which is a low basic weight area | region, and a transversal direction groove part may have a basic weight of 0 g / m < ² >.

In the embodiment in which the absorbent article of the present disclosure includes a diffusion sheet, a diffusion sheet that is normally used in the art can be adopted without particular limitation.
As said diffusion sheet, the nonwoven fabric sheet of Unexamined-Japanese-Patent No. 2013-150799, ie, the ratio of 20-40 mass parts and 10-70 mass parts of beaten pulp (a) and regenerated cellulose (b), respectively. A beaten pulp (a) is fibrillated and has a weight-weighted average fiber length in the range of 1.0 to 5.0 mm, and the nonwoven sheet has a weight of 50 to 280 mg / cm. Non-woven fabric sheet characterized by having a density of ³ .

  As said diffusion sheet, the 1st fiber layer containing the hydrophilic fiber which has an average fiber length of 25 mm-64 mm, the 2nd fiber layer containing the hydrophilic fiber which has an average fiber length of 25 mm-64 mm, and between them A laminated sheet including a pulp fiber layer containing pulp is preferable. Moreover, it is preferable that the said laminated sheet is formed by the 1st fiber layer, a pulp fiber layer, and a 2nd fiber layer being entangled by a water flow. More preferably, the laminated sheet is obtained by connecting the first fiber layer, the pulp fiber layer, and the second fiber layer without using an adhesive.

  In addition, the average fiber length is measured on each glass plate with a scale of “A7.1.1 A method (standard method)” in “A7.1 Measurement of fiber length” in Annex A of JIS L 1015: 2010. It means the average fiber length measured according to “Method for Measuring Fiber Length”.

  The absorbent core in the absorbent article of the present disclosure, that is, the absorbent core having the low basis weight region that forms the longitudinal groove portion and the short-side groove portion, is disclosed in, for example, Japanese Patent Application Laid-Open No. 2010-233839 and Japanese Patent Application Laid-Open No. 2014-2014. It can be formed according to the method described in Japanese Patent No. 136126.

Hereinafter, although an example is given and this indication is explained, this indication is not limited to these examples.
[Production Example 1]
Absorbent core No. 1 having a size of 350 mm × 120 mm (longitudinal direction × short side direction) including pulp (basis weight: 200 g / m ² ) and a superabsorbent polymer (basis weight: 250 g / m ² ). 1 was produced. Absorption core No. 1 has five longitudinal grooves (width-direction length: 5 mm) arranged on one surface at intervals of 20 mm, and nine short-direction grooves (width-direction length: 5 mm). ) Were arranged at intervals of 30 mm. Each of the longitudinal groove portion and the short-side groove portion had a basis weight of 80 g / m ² .

Absorbent core No. 1 was covered with ^two tissues (basis weight: 16 g / m ² , 400 mm × 150 mm) as a core wrap with a hot melt adhesive interposed therebetween. Absorption core No. 2 covered with two tissues. The thickness of the absorbent core was adjusted by pressing 1 with a hydraulic press, and then the absorbent core No. 1 covered with two tissues was used. 1 is formed with an embossed portion which is 3 mm in length and continuous in the longitudinal direction. 1 was formed. Absorber No. The thickness of 1 is shown in Table 2.
Absorber No. A liquid-permeable sheet (air through nonwoven fabric) is pasted on the first surface (one surface side of the absorbent core) of 1 and the liquid-impermeable sheet on the second surface (surface on the other surface side of the absorbent core) By adhering (polyethylene film), a simple absorbent article no. 1 was produced.

[Production Example 2]
Absorption core No. 1 in the same manner as in Production Example 1 except that a diffusion sheet was added between one surface of the tissue and the tissue. 2 was produced. The diffusion sheet includes a first fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, a second fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, and a gap therebetween. It was a laminated sheet (basis weight: 50 g / m ² ) containing a pulp fiber layer containing pulp.

[Production Example 3]
The absorbent article No. 1 was formed in the same manner as in Production Example 1 except that the longitudinal groove was formed but the embossed part was not formed and the short groove was not formed. 3 was produced.

[Examples 1 and 2, and Comparative Example 1]
Absorbent article no. 1-No. No. 3 was subjected to an absorptivity test as defined below, and the absorption rate, the rewet amount, and the diffusion length on the liquid permeable sheet side were evaluated. The results are shown in Table 2.

[Absorbability test]
(1) The absorbent article is set in a U-shaped instrument having a substantially U-shaped side view. In addition, an absorbent article is set to a U-shaped instrument so that the center position of the longitudinal direction of an absorber and the position of a U-shaped instrument center part (position with the lowest height) may be matched.

<First cycle>
(2) 80 mL of artificial urine (first time) is injected into the center of the absorber from the burette at a rate of 80 mL / 10 seconds.
(3) Record the time from the start of the first artificial urine injection until the artificial urine in the U-shaped instrument disappears as the absorption time (80 mL).
(4) Three minutes after the start of the first artificial urine injection, the contour (80 mL) of the region where the artificial urine has diffused is recorded on the liquid-permeable sheet of the absorbent article.

<Second cycle>
(5) Ten minutes after the start of the first artificial urine injection, 80 mL of artificial urine (second time) is injected from the burette into the center of the absorber at a rate of 80 mL / 10 seconds.
(6) The time from the start of the second artificial urine injection until the artificial urine in the U-shaped device disappears is recorded as the absorption time (160 mL).
(7) Three minutes after the start of the second injection of artificial urine, the contour (160 mL) of the region where the artificial urine has diffused is recorded on the liquid-permeable sheet of the absorbent article.

<Third cycle>
(8) The operations of (5) to (7) are repeated, the absorption time (240 mL) is measured, and the contour (240 mL) is recorded.
<4th cycle>
(9) The operations of (5) to (7) are repeated, the absorption time (320 mL) is measured, and the contour (320 mL) is recorded.

(10) Four minutes after the start of the fourth artificial urine injection, the absorbent article is taken out of the U-hour device, and the absorbent article is spread on the acrylic flat plate so that the liquid-permeable sheet is on the upper surface. Let stand for a minute.
(11) Five minutes after the start of the fourth artificial urine injection, 60 g of 100 mm × 100 mm filter paper is placed on the liquid-permeable sheet of the absorbent article with the artificial urine injection point as the center. Further, a weight of 3.5 kg, 100 mm × 100 mm × 50 mm (height) is placed on the plate. For filter paper, measure the mass before the test in advance.
(12) Eight minutes after the start of the fourth artificial urine injection, the weight is removed, the mass of the filter paper is measured, the mass of the filter paper before the test is subtracted, and the difference is defined as the rewet amount.
(13) The diffusion length of the artificial urine in the longitudinal direction of the absorbent article is measured from the contour (160 mL to 320 mL) of the region where the artificial urine has diffused.

  Artificial urine was prepared by dissolving 200 g of urea, 80 g of sodium chloride, 8 g of magnesium sulfate, 3 g of calcium chloride, and about 1 g of pigment: Blue No. 1 in 10 L of ion-exchanged water.

  Absorbent article No. 4 having completed the 4-cycle absorbency test. 1-No. 3 was deformed in the longitudinal direction and the short direction so that the liquid-permeable sheet was inside, the absorbent article No. 3 was obtained. 1 and no. 2 is an absorbent article No. 2; It was easier to deform in the shorter direction than 3. After finishing the 4-cycle absorbency test, the absorbent article no. 1 and no. 2 indicates that the longitudinal groove remains.

  Also, the absorbent article No. 1 and no. 2 is an absorbent article No. 2; Compared to 3, there was a tendency that the absorption rate was fast, the amount of rewet was small, and the diffusion length was long. It is suggested that the longitudinal groove portion having the embossed portion is hardly crushed even if the artificial urine is repeatedly absorbed, and the artificial urine is diffused in the longitudinal direction.

[Production Example 4]
Absorbent article No. 4 was produced in the same manner as in Production Example 2 except that the diffusion sheet was changed to one having a plurality of slit portions extending in the longitudinal direction as shown in FIG.
[Production Example 5]
Absorbent article No. 2 was produced in the same manner as in Production Example 2 except that the longitudinal groove portion and the short-side groove portion were not formed. 5 was produced.

[Examples 3 to 5 and Comparative Examples 2 and 3]
Absorbent article no. 1-No. About 5, the bending rigidity value of the longitudinal direction and the transversal direction was measured. The results are shown in Table 3. The bending stiffness value was measured according to the method described in this specification.

  Absorbent article No. having a longitudinal groove and a transverse groove. No. 1 is an absorbent article No. 1 having no groove. Compared to 3, the bending rigidity value is low, and the fitting property is excellent. Absorbent article No. provided with a diffusion sheet. No. 2 has a diffusion sheet that has entered the longitudinal groove, so that the rigidity of the absorbent article is increased, but the absorbent article No. 2 provided with a diffusion sheet having a plurality of slit parts. No. 4 is an absorbent article no. It shows a bending rigidity value equivalent to 5, and has the same flexibility.

DESCRIPTION OF SYMBOLS 1 Absorbent article 3 Liquid permeable sheet 5 Liquid impermeable sheet 7 Absorber 9 Absorbing core 11 Core wrap 13 Diffusion sheet 15 Skin side 17 Clothing side 19 Longitudinal groove 19a Low basis weight area 20 Bottom 21 Short direction groove 21a Low basis weight region 22 bottom 23 compressions 24 central part 31 (has reached the absorber) liquid 33 (absorbed) liquid 41 slit portion L _O longitudinal L _a lateral direction VL _1, VL ₂ virtual line RA right area LA Left area CA Central area

Claims (12)

An absorbent article comprising an absorbent body having a longitudinal direction, a transverse direction and a thickness direction,
The absorber comprises an absorbent core having one surface and the other surface, and a core wrap disposed on at least one surface side of the absorbent core,
The absorbent core is recessed from the one surface and extends in the longitudinal direction, and has a bottom portion, the longitudinal groove portion having a basis weight smaller than the average basis weight of the absorbent core, and the one A groove having a bottom that is recessed from the surface or the other surface and extends in the short direction, and having a basis weight smaller than an average basis weight of the absorbent core, and the core wrap. Is joined to the bottom of the longitudinal groove,
The said absorbent article characterized by the above-mentioned.   The absorptive article according to claim 1 in which said longitudinal direction slot has the length of the width direction 0.5 to 3.0 times the thickness of said absorber.   The absorbent body is a squeezed portion in which a central portion of the longitudinal groove portion and a portion overlapping the central portion and the thickness direction of the core wrap are squeezed, and continuous along the longitudinal groove portion. Or the absorbent article of Claim 1 or 2 provided with the pressing part extended intermittently.   The absorbent body further includes a core wrap disposed on the other surface side of the absorbent core, and the compressed portion is disposed on the central portion of the core wrap, the one surface, and the other surface side. The absorptive article according to claim 3 which squeezes the central part and the part which overlaps in the thickness direction among them.   The absorber further includes a diffusion sheet disposed between the one surface of the absorbent core and the core wrap, or on the surface of the core wrap opposite to the one surface of the absorbent core. The said pressing part is pressing the part which has overlapped with the said center part and the said thickness direction among the said center part of the said longitudinal direction groove part, and the said core wrap and the said diffusion sheet. Absorbent article as described in 1.   The diffusion sheet has a first fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, a second fiber layer containing hydrophilic fibers having an average fiber length of 25 mm to 64 mm, and pulp therebetween. The absorptive article according to claim 5 which is a lamination sheet containing a pulp fiber layer containing.   The absorptive article according to claim 5 or 6 in which said diffusion sheet has a plurality of slit parts which penetrate in the thickness direction.   The absorber is partitioned into one end side region, the other end side region, and a central region therebetween by an imaginary line that divides the absorber into three equal parts in the lateral direction, and the absorber is the longitudinal The absorbent article as described in any one of Claims 1-7 which equips all of the said one end side area | region, the other end side area | region, and a center area | region with a direction groove part.   The absorbent article is partitioned into three regions, a front waistline region, a back waistline region, and a crotch region therebetween, in the longitudinal direction, and the absorbent body is disposed over the three regions. The absorptive article according to any one of claims 1 to 8, wherein the absorbent body includes the groove in the short direction in all of the three regions.   The core wrap according to any one of claims 1 to 9, wherein the core wrap is not joined to the bottom of the short-side groove in a portion of the short-side groove that does not intersect with the long-side groove. Absorbent article.   The absorbent article according to any one of claims 1 to 10, wherein the absorbent core includes the short-side groove portion on the one surface, and the one surface is a skin side surface.   The area | region containing the said absorber of the said absorbent article has the bending rigidity value of 20-50 mN * m in the said longitudinal direction and a transversal direction, The absorbent article as described in any one of Claims 1-11. .

Images