JP6192794B1 - Absorbent articles - Google Patents

Abstract

An absorbent article capable of improving the absorption rate while suppressing clogging of compressed grooves is provided. An absorbent article (1) includes a top sheet (2) and an absorbent body (4) including a first absorbent layer (11) and a second absorbent layer (12), wherein the top sheet and the absorbent body are squeezed. A groove 5 is provided. The first absorbent layer is located between the central central region 21 where the absorbent polymer is present, the outer regional region 22 outside thereof, and the central region and the outer regional region, and has a small amount of absorbent polymer. And a non-existing region 31. The compressed groove is located in the non-existing area 31 and is separated from the central existing area and the outer existing area. The distance between the edge of the pressing groove facing each other and the edge of the central existence area is shorter than the distance between the edge of the pressing groove facing each other and the edge of the outer existence area. [Selection] Figure 2

Description

  The present invention relates to an absorbent article.

  Absorbent articles such as light incontinence pads are used to absorb and retain excreta such as urine and menstrual blood excreted from the wearer. Since absorbent articles are required to absorb excrement quickly without leaking to the outside regardless of the situation, development of technology for further improving the absorption performance has been performed. As such a technique, for example, there is an absorbent article having two layers of absorbent bodies.

  The absorbent article which made the absorber into two layers is disclosed by patent document 1, for example. This absorbent article has a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent disposed between the surface sheet and the leak-proof sheet. The absorber is composed of at least two layers, and at least one layer is a first absorber layer composed of a liquid-permeable sheet and a superabsorbent polymer. A 1st absorber layer is joined by a surface sheet and a pressing groove. A 1st absorber layer has a spreading | diffusion area | region where a superabsorbent polymer is spread | dispersed on both sides of a pressing groove by planar view. A spreading | diffusion area | region contains the spreading | diffusion area | region of the center of an absorber, and the spreading | diffusion area | region of the side of an absorber in the width direction on both sides of a pressing groove.

  Here, when excrement is excreted in the squeezing groove, and the superabsorbent polymer in the central spraying region and the superabsorbent polymer in the lateral spraying region absorb the excrement in the squeezing groove and expand, There is a risk of crushing the compressed groove, that is, closing the compressed groove. Therefore, in Patent Document 1, a non-spreading region in which the superabsorbent polymer is not sprayed is provided between the central spraying region and the lateral spraying region in the first absorber layer. The non-spreading area is equally divided in the width direction by the pressing grooves. Therefore, a 1st absorber layer is a non-spreading area | region divided | segmented by the pressing groove in the width direction between the pressing groove and the center spraying area, and between a pressing groove and a side spraying area. In this region, there is a void that is a substantially non-existent region of an absorbent polymer of approximately equal size. As a result, even if the superabsorbent polymer expands, these voids become a buffer region or expansion allowance, accept the expansion of the superabsorbent polymer, and prevent the clogging groove from being blocked.

Republished WO2010 / 107096

  By the way, when it is going to absorb the excrement of a pressing groove, the absorptive polymer of the dispersion | spreading area | region of the absorbent article of patent document 1 will absorb excrement through the space | gap. However, in that case, the voids present in the excretion absorption path suppress the absorption, and the excretion absorption rate by the absorbent polymer in each spray region decreases. When the absorption rate decreases, excrement tends to remain without being absorbed, such as when there is a large amount of excrement, and before each spray area absorbs excrement, excrement leaks out of the absorbent article. There is a risk that.

  Then, the objective of this invention is a pair in which the absorber containing the 1st absorption layer and 2nd absorption layer which have an absorptive polymer, the surface sheet, the 1st absorption layer, and the 2nd absorption layer was squeezed. It is providing an absorbent article which can improve an absorption rate, suppressing an obstruction | occlusion of a pressing groove.

  The absorbent article of the present invention is as follows. (1) It has a longitudinal direction, a width direction, and a thickness direction, and includes a top sheet and an absorbent body positioned on the non-skin side of the top sheet, and the absorbent body includes the first absorbent layer, A second absorbent layer laminated on the non-skin side of the first absorbent layer, and extending in the longitudinal direction and arranged at intervals in the width direction, and the first absorbent sheet It is an absorptive article provided with a pair of pressing grooves by which a layer and the 2nd absorption layer were squeezed, and the 1st absorption layer is located in the center of the width direction, and the center where an absorptive polymer exists Located in both outer sides in the width direction of the presence region, the center presence region, a pair of outer presence regions where the absorbent polymer exists, and located between the center presence region and the pair of outer presence regions, A pair of non-existing regions where no absorbent polymer exists, and one of the pair of compressed grooves The other is located in one and the other of the pair of non-existing regions in the width direction, and is separated from the center existing region and the pair of outer existing regions, and faces each other in the width direction. The absorbent article in which the distance between the edge of the compressed groove and the edge of the central existence area is shorter than the distance between the edge of the compressed groove and the edge of the outer existence area facing each other.

In this absorbent article, it is configured as described above, and the compressed groove is located in the non-existing area, is separated from the central existing area and the outer existing area, and exists in the center in the width direction more than the outer existing area. Located near the area. Therefore, among the non-existing regions divided in the width direction by the compressed groove, the region on the side of the central region is small (region where the absorbent polymer is substantially absent), and the region on the side of the outer region is large. Become.
As a result, since the space | gap by the side of a center presence area | region is small, the excretion excreted by the pressing groove among excretion becomes easy to be absorbed by the absorptive polymer of a center presence area. Therefore, excreta is preferentially absorbed by the absorbent polymer in the central region through small voids, and is therefore absorbed by the absorbent polymer in the central region. As a result, the volume of the absorbent polymer in the central region is significantly expanded. Thereby, the wall surface at the side of the central region of the compressed groove rises rapidly in the thickness direction to form a steep wall surface. Therefore, the excretion excreted at the urination point in the substantially central portion of the central existence region is likely to be guided from the central existence region along the steep wall surface into the squeezing groove and easily accumulated in the squeezing groove. As a result, excrement can be easily diffused and absorbed from the bottom of the compressed groove to the second absorption layer on the non-skin side.
On the other hand, since the excrement excreted in the compressed groove is passed through a large gap, it is difficult to be absorbed by the absorbent polymer in the outer region. At that time, the absorbent polymer in the outer region does not absorb the excrement so much that the volume does not expand so much. Thereby, the wall surface on the outer side existing region side in the compressed groove does not rise so much in the thickness direction, and forms a gentle wall surface. Therefore, excrement accumulated in the compressed groove is accumulated while spreading on the gentle wall surface side on the outer side existence region side, that is, accumulated while spreading on the outer side in the width direction in the compressed groove. As a result, compared with the case where it accumulates in a normal pressing groove, a lot of excrement can be accumulated outside the pressing groove. Thereby, the surface area which contact | connects the surface sheet of an absorbent article can be enlarged, and excrement can be absorbed using the area | region of the outer side of the pressing groove where excrement is hard to spread | diffuse effectively. Therefore, excretion can be easily absorbed into the first absorption layer in the width direction through the top sheet.
Thus, not only can excrement be easily diffused to the second absorption layer in the thickness direction through the compressed groove, but also excretion can be easily diffused to the first absorption layer in the width direction, so that the absorbency is improved. The absorption rate of the entire article can be improved, and the smoothness of the surface can be easily maintained.

In the absorbent article of the present invention, (2) the first absorbent layer includes a liquid permeable sheet that wraps the absorbent polymer contained in the first absorbent layer, and the liquid permeable sheet is provided in the non-existing region. The skin side surface and the non-skin side surface of the sheet have a joint region joined to each other, and the joint region spreads on both sides in the width direction of the compressed groove in a plan view. The distance between the inner edge in the joining region and the inner edge in the pressing groove is shorter than the distance between the outer edge in the joining region and the outer edge in the pressing groove (1) The absorbent article described in 1. may be used.
In this absorbent article, by having the said structure, an absorbent polymer can be hold | maintained and confined in a liquid-permeable sheet | seat in the width direction. When the absorbent polymer absorbs excrement and swells, the liquid-permeable sheet can suppress the swelling of the absorbent polymer in the width direction and can prevent the compressed groove from being blocked. Accordingly, the excrement is diffused to the second absorption layer in the thickness direction through the compressed groove, the excrement is diffused to the first absorption layer in the width direction, and the absorption rate of the entire absorbent article is improved. The effect of facilitating the maintenance of the smooth feeling can be more reliably exhibited.

In the absorbent article of the present invention, (3) the first absorbent layer is positioned outside the front and rear in the longitudinal direction in the center existence area, and the front non-existence area and the rear non-existence where the absorbent polymer is not present. A front pressing groove and a rear pressing including the existing region, the surface sheet, the first absorbent layer, and the second absorbent layer, which are extended in the width direction and arranged at intervals in the longitudinal direction. The front pressing groove and the rear pressing groove are located in the front non-existing area and the rear non-existing area, respectively, and are separated from the central existing area and the pair of outer existing areas, In the longitudinal direction, the distance between the edge of the front squeezing groove facing each other and the edge of the center existing area is the distance between the edge of the front squeezing groove facing each other and the outer edge of the front non-existing area. Shorter than The distance between the edge of the rear pressing groove facing the edge and the edge of the center existing area is shorter than the distance between the edge of the rear pressing groove facing the other and the outer edge of the rear non-existing area, The absorptive article given in the above (1) or (2) may be sufficient.
In the present absorbent article, by having the above-described configuration, the front and rear compressed grooves are positioned in the front and rear non-existing regions, respectively, separated from the central existing region and the pair of outer existing regions, and centered in the longitudinal direction. Located near the existence area. Therefore, among the front and rear non-existing areas divided in the longitudinal direction by the front and rear pressing grooves, the gap is small in the area on the center existing area side, and the gap is increased in the area on the opposite side. As a result, since the gap on the center existing area side is small, excreta excreted in the front and rear pressing grooves is preferentially absorbed by the absorbent polymer in the center existing area and absorbed more. As a result, the volume of the absorbent polymer expands significantly, whereby the wall surface on the side of the center area of the front and rear compressed grooves rises rapidly in the thickness direction, forming a steep wall surface. Therefore, the excretion excreted at the urination point in the substantially central portion of the central existence region is guided to the front and rear pressing grooves along the steep wall surface from the central existence region, and is easily accumulated in the front and rear pressing grooves. As a result, excrement can be easily diffused and absorbed from the bottom of the front and rear compressed grooves to the second absorption layer on the non-skin side. On the other hand, in the region opposite to the center existing region across the front and rear pressing grooves, the wall surfaces of the front and rear pressing grooves do not rise so much in the thickness direction, and form a gentle wall surface. Therefore, excreta accumulated in the front and rear compressed grooves is accumulated while spreading on the gentle wall surface side. As a result, more excrement can be accumulated outside the forward and rearward compressed grooves than in the case of being accumulated in the normal compressed grooves. Thereby, the surface area which contacts the surface sheet of an absorbent article can be enlarged, and the area | region outside the front and back pressing groove where excrement cannot diffuse easily can be utilized for absorption of excrement. Therefore, excretion can be easily absorbed into the first absorption layer in the longitudinal direction via the surface sheet. In this way, not only facilitates diffusion of excrement to the second absorption layer in the thickness direction along the front and rear compressed grooves, but also facilitates diffusion of excrement to the first absorption layer in the longitudinal direction. The absorption speed of the absorbent article as a whole can be improved, and the smoothness of the surface can be easily maintained.

(4) The first absorbent layer includes a liquid-permeable sheet that wraps the absorbent polymer contained in the first absorbent layer, and the front absence region and the rear absence In the region, each has a front joint region and a rear joint region in which the skin side surface and the non-skin side surface of the liquid permeable sheet are joined to each other, and the front joint region and the rear joint region are in plan view. In the longitudinal direction, the front squeezing groove and the rear squeezing groove extend to both sides in the longitudinal direction.In the longitudinal direction, the distance between the inner edge in the front joint region and the inner edge in the front squeezing groove is The distance between the outer edge in the front joining region and the outer edge in the front pressing groove is shorter than the distance between the inner edge in the rear joining region and the inner edge in the rear pressing groove. Rear junction Shorter than the distance between the outer edge at the edge and the rear compression groove of the outer side in the absorbent article according to the above (3), but good.
In this absorbent article, by having the said structure, an absorptive polymer can be hold | maintained and confined in a liquid-permeable sheet | seat in a longitudinal direction. When the absorbent polymer absorbs excrement and swells, the liquid-permeable sheet can suppress swelling of the absorbent polymer in the longitudinal direction, and can block the front and rear compressed grooves from being blocked. Thereby, the excrement is diffused to the second absorption layer in the thickness direction through the front and rear pressing grooves, and the excrement is diffused to the first absorption layer in the width direction, thereby improving the absorption rate of the entire absorbent article. In addition, the effect of facilitating maintaining the smoothness of the surface can be more reliably exhibited.

In the absorbent article of the present invention, (5) in the longitudinal direction, the distance between the inner edge in the front joint region and the edge of the center existing region facing the edge is the distance in the front joint region. The distance between the inner edge and the inner edge in the front squeezing groove is shorter, and the distance between the inner edge in the rear joining area and the edge of the central existence area facing the edge is The absorbent article according to the above (4), which is shorter than the distance between the inner edge in the rear joining region and the inner edge in the rear pressing groove.
In the present absorbent article, by having the above-described configuration, in the first absorbent layer, the distance between the inner edge of the front joint region and the edge of the central existence region is short. The region where the polymer swells in the longitudinal direction can be reduced. As a result, the absorbent polymer can be swelled upward in the thickness direction, and the wall surface on the center existing region side of the forward pressing groove can be made steeper. Therefore, in the region outside the forward squeezing groove, the excrement is diffused above the second absorption layer on the outer side in the longitudinal direction, and the excrement is absorbed by the second absorption layer on the outer side in the longitudinal direction L. Can do. As a result, it is possible to improve the absorption speed of the absorbent article as a whole, and more reliably achieve the effect of facilitating the maintenance of a smooth feeling on the surface.

In the absorbent article of the present invention, (6) in the topsheet, the fiber density of the region corresponding to the central existence region is higher than the fiber density of the region corresponding to each of the pair of outer existence regions, The absorbent article according to any one of 1) to (5) may be used.
In this absorbent article, by having the above-described configuration, excretion can be preferentially drawn into the area corresponding to the center existing area where the fiber density is high in the surface sheet, and more in the absorbent polymer in the center existing area. Can be absorbed. Thus, the absorbent polymer in the central presence region can be preferentially expanded over the absorbent polymer in the outer presence region. Thereby, the wall surface on the center existing area side of the compressed groove is suddenly raised and can be easily accumulated in the compressed groove, and the excrement can be easily diffused and absorbed from the bottom of the compressed groove to the second absorption layer on the back sheet side. it can. On the other hand, excretion is not preferentially drawn into the region corresponding to the outer region where the fiber density is low, so that the absorbent polymer in the outer region does not absorb much. Therefore, the swelling of the absorbent polymer in the outer region can be suppressed more than the absorbent polymer in the central region. Thereby, the wall surface of the outer side of the squeezing groove can be gently inclined to increase the surface area in contact with the top sheet of the absorbent article, so that excrement can be easily absorbed by the first absorbent layer in the width direction. As a result, the absorption rate of the absorbent article as a whole can be improved, and the effect of facilitating the maintenance of a smooth surface can be more reliably exhibited.

In the absorbent article of the present invention, (7) in the thickness direction, the thickness of the second absorbent layer is a, and the penetration depth of the compressed groove into the second absorbent layer is b. The absorbent article according to any one of (1) to (6) above, wherein the b satisfies (a / 2) <b <a.
In this absorbent article, by having the said structure, it can make it easy to draw in excrement from a pressing groove to a 2nd absorption layer, and makes it easy to diffuse the drawn in excretion in the surface direction of a 2nd absorption layer. be able to. As a result, it is possible to improve the absorption speed of the absorbent article as a whole, and more reliably achieve the effect of facilitating the maintenance of a smooth feeling on the surface. When the value of b is too small, the area of the wall surface (side surface) of the squeezing groove in the second absorption layer becomes small, and excrement hardly diffuses from the wall surface to the second absorption layer. As a result, the amount of excrement drawn into the second absorbent layer and the amount of excreted excreted diffused in the in-plane direction of the second absorbent layer are reduced. Furthermore, if the value of b is too small, the absorber 4 has a low strength as a whole and is easily kinked. On the other hand, when the value of b is too large, the compressed groove 5 substantially penetrates the second absorbent layer. As a result, the excrement cannot be diffused from the bottom of the compressed groove to the second absorption layer, and there is a risk that the amount of excretion drawn into the second absorption layer will be short or leak out of the absorbent article.

In the absorbent article of the present invention, (8) in the second absorbent layer, the thickness of the region corresponding to the central existence region is thicker than the thickness of the region corresponding to the outer existence region. The absorbent article as described in any one of (7).
In the present absorbent article, by having the above-described configuration, the height position of the center existing area with respect to the non-skin side surface in the first absorbent layer is higher than the height position of the outer existing area. Thereby, when excrement is excreted in the squeezing groove, it is possible to further enhance the effect that the central existence area absorbs a lot of excrement and the wall surface on the central existence area side of the squeezing groove rises (early and steeply). Can stand up). In addition, it is possible to further enhance the effect that the outer region does not absorb much excrement and the wall surface on the outer region side of the squeezing groove has a gentle slope. Accordingly, excrement can be more easily diffused to the second absorbent layer in the thickness direction through the compressed groove, and excrement can be more easily diffused to the first absorbent layer in the width direction, and thus the entire absorbent article. As a result, the absorption rate can be further improved, and the smoothness of the surface can be more easily maintained.

The absorbent article of the present invention is (9) wherein the pressing groove includes a high-pressure pressing portion having a deep depth in the thickness direction and a low-pressure pressing portion having a shallow depth in the thickness direction, and the high-pressure pressing portion. The absorbent article according to any one of the above (1) to (8), in which a portion and the low-pressure portion are alternately arranged.
In this absorbent article, by having the said structure, excrement is diffused in the deep area | region of a 2nd absorption layer in a high pressing part, and excrement is diffused in the shallow area | region of a 2nd absorption layer in a low pressing part. Can do. Since excrement can be diffused almost simultaneously into regions of different depths of the second absorption layer, the second absorption layer can be used efficiently in the depth direction. Thereby, circulation of excrement in the squeezing groove can be improved, and the absorption rate of excrement through the squeezing groove can be improved. Therefore, the absorption rate of the absorbent article as a whole can be further improved, and the smoothness of the surface can be more easily maintained.

  According to the present invention, the absorbent body including the first absorbent layer and the second absorbent layer having the absorbent polymer, the pair of the topsheet, the first absorbent layer, and the second absorbent layer that are squeezed. An absorptive article provided with a squeezing groove can provide an absorptive article which can improve an absorption rate, suppressing clogging of a squeezing groove.

It is a top view which shows the structure of the absorbent article which concerns on embodiment. It is sectional drawing which follows the II-II line | wire of FIG. It is a top view which shows the structure of a 1st absorption layer. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. It is a schematic diagram which shows the non-existence area | region and non-existence area | region of FIG. It is a top view which shows the structure of the 2nd absorption layer which concerns on embodiment. It is sectional drawing which follows the VIII-VIII line of FIG. It is sectional drawing explaining the effect | action of an absorbent article. It is sectional drawing explaining the relationship between the depth of a pressing groove and the thickness of a 2nd absorption layer. It is a top view which shows typically the structure of a pressing groove. It is a schematic diagram explaining the measuring method of an absorption rate.

  Hereinafter, the light incontinence pad will be described as an example of the absorbent article according to the embodiment. In this case, the excrement that is the absorption target of the absorbent article is urine. The type and application of the absorbent article are not particularly limited, and other absorbent articles may be used without departing from the scope of the present invention. Examples of the absorbent article include panty liners, sanitary napkins, and disposable diapers.

  1-2 is a figure which shows the structure of the absorbent article 1 (light incontinence pad) which concerns on embodiment, FIG. 1 shows the top view of the absorbent article 1 of the expand | deployed state, FIG. 2 is FIG. Sectional drawing which follows an II-II line is shown. The absorbent article 1 has a longitudinal direction L, a width direction W, and a thickness direction T perpendicular to each other, a longitudinal center line CL extending in the longitudinal direction L through the center of the width direction W, and the center of the longitudinal direction L. And a width direction center line CW extending in the width direction W. Since the longitudinal direction L, the width direction W, and the thickness direction T of the absorbent article 1 coincide with the longitudinal direction, the width direction, and the thickness direction of each material of the absorbent article 1, the absorbent article 1 and each material thereof However, the longitudinal direction L, the width direction W and the thickness direction T are used in common. One direction and the other direction of the longitudinal direction L are defined as front and rear, respectively. The “plan view” means that the absorbent article 1 in a developed state is viewed in the thickness direction T from the upper surface side. “Skin side” and “non-skin side” mean a side closer to the wearer's skin surface and a side farther in the thickness direction T when the absorbent article 1 is worn by the wearer of the absorbent article 1. means. The “in-plane direction” is a direction parallel to the plane including the width direction W and the longitudinal direction L. A direction toward the longitudinal center line CL and a direction away from the longitudinal center line CL are defined as an inner direction and an outer direction in the width direction W, respectively. A direction toward the center line CW in the width direction and a direction away from the center line CW are defined as the inner and outer directions of the longitudinal direction L, respectively. These definitions are also commonly used for each material of the absorbent article 1.

  As shown in FIG. 1, the absorbent article 1 has a shape in which both ends of a rectangular longitudinal direction L having a long side extending in the longitudinal direction L and a short side extending in the width direction W swell in an arc shape in plan view. have. However, in the present embodiment, the shape of the absorbent article 1 is not limited to such a shape, and any shape may be used as long as the length dimension in the longitudinal direction L is longer than the width dimension in the width direction W. The vertically long shape (example: rectangular, elliptical, bowl-shaped) can be used.

  As shown in FIG. 2, the absorbent article 1 includes a top sheet 2, a back sheet 3, and a non-skin side of the top sheet 2, that is, an absorbent body 4 positioned between the top sheet 2 and the back sheet 3, Is provided. The top sheet 2 is a liquid permeable sheet located on the skin side of the wearer. Examples of the surface sheet 2 include any liquid-permeable sheet such as a liquid-permeable nonwoven fabric or woven fabric, a synthetic resin film having liquid-permeable holes, and a composite sheet thereof. The back sheet 3 is a liquid-impermeable sheet located on the non-skin side of the wearer. Examples of the back sheet 3 include an arbitrary liquid-impermeable sheet such as a liquid-impermeable nonwoven fabric or a synthetic resin film, a composite sheet of a nonwoven fabric and a synthetic resin film, and an SMS nonwoven fabric. The absorber 4 is a layer having liquid absorption performance and liquid retention performance. The non-skin side surface of the top sheet 2 and the skin side surface of the absorber 4 are joined to each other, and the non-skin side surface of the absorber 4 and the skin side surface of the back sheet 3 are joined to each other. . The peripheral portion of the non-skin side surface of the top sheet 2 and the peripheral portion of the skin side surface of the back sheet 3 are joined to each other.

The absorber 4 includes a first absorption layer 11 and a second absorption layer 12 laminated on the non-skin side of the first absorption layer. The first absorbent layer 11 has a substantially rectangular shape that is long in the longitudinal direction L in plan view, and is a sheet having liquid absorbability and liquid retainability that is located between the top sheet 2 and the back sheet 3. . The first absorbent layer 11 has a configuration in which an absorbent material 11b including absorbent polymers 14 and 15 is sandwiched between two liquid-permeable sheets 11a and 11a ′. The absorbent polymers 14 and 15 are not particularly limited as long as they can absorb and retain water, and examples thereof include starch-based, acrylic acid-based, amino acid-based particulate or fibrous superabsorbent polymers (SAP). It is done. The absorbent material 11b is not particularly limited as long as it includes the absorbent polymers 14 and 15 described above, and may include water absorbent fibers such as pulp in addition to the absorbent polymers 14 and 15. The water-absorbing fiber content is in the range of 0 to 90% of the mass of the absorbent polymers 14 and 15. In the present embodiment, the absorbent material 11b is composed of, for example, absorbent polymers 14 and 15 only. The liquid-permeable sheets 11a and 11a ′ are not particularly limited as long as they are liquid-permeable sheets. For example, hydrophilic nonwoven fabrics such as air-through nonwoven fabric, spunbond, laminated nonwoven fabric (example: SMS nonwoven fabric), and tissue are applied. it can. From the viewpoint of liquid permeability, the liquid-permeable sheets 11a and 11a ′ are preferably air-through nonwoven fabrics. The absorbent polymers 14 and 15 are preferably fixed to the liquid-permeable sheets 11a and 11a ′ with a hot-melt adhesive or the like (not shown), but are not fixed and covered with the liquid-permeable sheets 11a and 11a ′. It may exist. Examples of the basis weight of the absorbent polymers 14 and 15 include 100 to 400 g / m ² .

The second absorbent layer 12 has a substantially rectangular shape that is long in the longitudinal direction L in a plan view, and has a shape in which both ends of the longitudinal direction L are arc-shaped and a central portion of the longitudinal direction L is constricted in the width direction W. It is a layer having liquid absorption performance and liquid retention performance, located between the first absorption layer 11 and the back sheet 3. The second absorbent layer 12 has a configuration in which an absorbent core 12b including a mixture 16 of an absorbent polymer and a liquid-retaining substance is sandwiched between two liquid-permeable sheets 12a and 12a ′. The absorbent polymer is the same as the absorbent polymers 14 and 15 of the first absorbent layer 11. Examples of the liquid retaining material include water absorbent fibers such as pulp. The content of the absorbent polymer is in the range of 0 to 90% of the mass of the water absorbent fiber. Examples of the liquid permeable sheets 12a and 12a ′ include the liquid permeable sheets 11a and 11a ′ of the first absorption layer 11. The mixture 16 is preferably fixed to the liquid-permeable sheets 12a and 12a ′ with an adhesive (not shown) such as hot melt, but is not fixed and is covered with the liquid-permeable sheets 12a and 12a ′. May be. Examples of the basis weight of the absorbent polymer include 0 to 600 g / m ² , and examples of the basis weight of the water absorbent fiber include 100 to 700 g / m ² .

  The absorbent article 1 is a pair of squeezed surface sheets 2, the first absorbent layer 11, and the second absorbent layer 12, which are extended in the longitudinal direction L and arranged at a predetermined interval in the width direction W. Grooves 5 and 5 are provided. The pair of compressed grooves 5 and 5 extend in the longitudinal direction L to the vicinity of both end portions of the second absorbent layer 12. In the thickness direction T, the compressed groove 5 penetrates the first absorbent layer 11 from the top sheet 2 and extends into the second absorbent layer 12, and is formed by embossing, for example. In this Embodiment, the high density part 5t whose fiber density is higher than the circumference | surroundings is formed in the lower part (non-skin side part) of the bottom part of the pressing groove 5 by compression. An inner edge E01 and an outer edge E02 in the width direction W of the compressed groove 5 are an inner edge and an outer edge in the width direction W of the high-density portion 5t. In addition, the pressing groove 5 may reach in the thickness direction T from the surface of the top sheet 2 to the surface near the skin side of the back sheet 3. 1-5 mm is preferable and, as for the width | variety of the pressing groove 5, 2-3 mm is more preferable. In the present embodiment, the pattern of the pair of pressing grooves 5 and 5 is, for example, such that the distance between the pair of pressing grooves 5 and 5 is small (narrow) in the vicinity of the center in the longitudinal direction L and goes to both outer sides in the longitudinal direction L. It is formed so as to increase (expand) as it approaches, and to decrease (narrow) again as it approaches both ends of the second absorption layer 12. This pattern can easily diffuse the excrement moving in the longitudinal direction L along the pair of compressed grooves 5 and 5 in both the width direction W and the longitudinal direction L.

  In the present embodiment, the absorbent article 1 includes a front-side front pressing groove 6 and a rear-side rear pressing groove 6 ′ that extend in the width direction W and are arranged at a predetermined interval in the longitudinal direction L. In addition. The front squeezing groove 6 and the rear squeezing groove 6 ′ are formed in the thickness direction T by pressing the top sheet 2, the first absorbent layer 11, and the second absorbent layer 12 (example: embossing). It extends from the top sheet 2 through the first absorption layer 11 and extends into the second absorption layer 12. In this Embodiment, the high density part 6t whose fiber density is higher than the circumference | surroundings is formed in the lower part (non-skin side part) of the bottom part of the front pressing groove 6 and the back pressing groove 6 '. The inner edge and the outer edge in the longitudinal direction L of the front pressing groove 6 and the rear pressing groove 6 ′ are the inner edge and the outer edge in the longitudinal direction L of the high-density portion 6 t. The front pressing groove 6 and the rear pressing groove 6 ′ may reach in the thickness direction T from the surface of the top sheet 2 to near the skin side surface of the back sheet 3. 1-5 mm is preferable and, as for the width | variety of the front pressing groove 6 and the back pressing groove 6 ', 2-3 mm is more preferable. In the present embodiment, the front pressing groove 6 and the rear pressing groove 6 ′ are arcuate convex outward in the vicinity of both ends in the longitudinal direction L of the pair of pressing grooves 5, 5, and the pair of pressing grooves 5, It is arranged between the five.

  In this Embodiment, in the area | region enclosed by a pair of pressing grooves 5, 5 and the front pressing groove 6 and back pressing groove 6 ', the surface sheet 2 is carried out by pressing (embossing) when forming each pressing groove. The thickness is reduced by being pulled from the surroundings. Therefore, in the area surrounded by the compressed grooves, the fiber density of the topsheet 2 is higher than the area outside the compressed grooves. Therefore, the surface sheet 2 in the region surrounded by the compressed grooves has high absorbability, and excrement is easily drawn into the first absorption layer 11.

  As shown in FIG. 2, in the present embodiment, the absorbent article 1 further includes a pair of side gather sheets 7, 7, linear elastic members 8, 8, an exterior sheet 9, a fixing portion 10,. 10 and. The pair of side gather sheets 7 and 7 are leakage prevention walls that are arranged so as to cover the surfaces on both sides in the width direction W of the top sheet 2 and extend in the longitudinal direction L. The pair of side gather sheets 7, 7 is folded so as to be able to stand upright on the surfaces on both sides in the width direction W of the top sheet 2, and the inner edges in the width direction W are free ends so as to form a gather portion. Yes. The linear elastic members 8 and 8 are linear elastic bodies extending along the longitudinal direction L in the vicinity of the free ends of the pair of side gather sheets 7 and 7. For example, one linear elastic member 8, 8 is disposed on each of the pair of side gather sheets 7, 7 and contracts the edges of the pair of side gather sheets 7, 7. The exterior sheet 9 is bonded to the surface on the non-skin surface side of the back sheet 3 and is bonded to the pair of side gather sheets 7 and 7 at the peripheral edge portion. The fixing portions 10,..., 10 are elongated rectangular adhesive tapes attached along the longitudinal direction L on the opposite side of the backsheet 3 in the exterior sheet 9. In the present embodiment, six fixing portions 10,..., 10 arranged in the width direction W are provided. The fixing portions 10,... 10 fix the absorbent article 1 to a packaging sheet (not shown) via a separator when the absorbent article 1 is individually packaged, and wear the absorbent article 1 when the absorbent article 1 is used. Re-fix to the person's underwear.

  Next, the first absorption layer 11 will be further described with reference to FIGS. 2 and 3 to 6. 3 is a plan view of the first absorption layer 11, FIG. 4 is a sectional view taken along the line IV-IV of the first absorption layer 11 in FIG. 3, and FIG. 5 is a view of V of the first absorption layer 11 in FIG. FIG. 6 is a cross-sectional view taken along −V, and FIG. 6 is a plan view schematically showing the existence region and non-existence region of the first absorption layer 11 in FIG. 3. 3 to 5, at least one of the pressing groove 5, the front pressing groove 6, and the rear pressing groove 6 'is virtually illustrated.

  As shown in FIGS. 3 to 5, in the first absorption layer 11, there are several spaces formed between the skin-side liquid-permeable sheet 11 a and the non-skin-side liquid-permeable sheet 11 a ′. The joining area is divided into a plurality of areas in plan view. In the joining region, a part of the liquid permeable sheet 11a and a part of the liquid permeable sheet 11a ′ opposed thereto are pressed in the thickness direction T (example: embossing) or an adhesive (example: hot melt adhesive). It is formed by pressing through.

  In the present embodiment, the first absorption layer 11 is divided into three regions in the width direction W by a pair of bonding regions 11t1 and 11t1, and these three regions are forward in the longitudinal direction L and forward in the rearward direction. It is sealed by the joining region 11t2 and the rear joining region 11t2 ′. The three areas are a central arrangement area 11s1 and a pair of outer arrangement areas 11s2 and 11s2 located on both outer sides in the width direction W thereof. However, the pair of joining regions 11t1 and 11t1 are belt-like regions that extend in the longitudinal direction L and are arranged at predetermined intervals on both sides in the width direction W with the longitudinal center line CL interposed therebetween. The pattern of the pair of joining regions 11t1 and 11t1 is, for example, a pattern in which the distance between the two is narrow in the vicinity of the center in the longitudinal direction L and is expanded toward both outer sides in the longitudinal direction L. It is formed along the pattern of the grooves 5. The front joint region 11t2 and the rear joint region 11t2 'are band-like regions that extend in the width direction W and are arranged at predetermined intervals on both sides in the longitudinal direction L with the width direction center line CW interposed therebetween.

  Therefore, in the present embodiment, the centrally arranged region 11s1 is formed by the liquid permeable sheets 11a and 11a ', the pair of joining regions 11t1 and 11t1, and the front joining region 11t2 and the rear joining region 11t2'. The central arrangement region 11s1 has a substantially hourglass shape that is long in the longitudinal direction L. Each outer arrangement region 11s2 is formed by the liquid permeable sheets 11a and 11a ', the bonding regions 11t1, the front bonding region 11t2, and the rear bonding region 11t2'. Each outer arrangement region 11s2 has a substantially rectangular shape whose inner side is a convex curve with respect to the longitudinal center line CL and is long in the longitudinal direction L. In the present embodiment, the joining region 11t1 is a high-density portion having a fiber density higher than that of the surroundings by pressing. Therefore, the inner edge E21 and the outer edge E22 in the width direction W of the bonding region 11t1 are an inner edge and an outer edge in the width direction W of the high-density portion. Similarly, the front joining region 11t2 and the rear joining region 11t2 'are high-density portions having a fiber density higher than that of the surroundings by pressing. Therefore, the inner edge and the outer edge in the longitudinal direction L of the front joint region 11t2 and the rear joint region 11t2 'are the inner edge and the outer edge in the longitudinal direction of the high-density portion. The shapes of the pair of joining regions 11t1, 11t1, the front joining region 11t2, and the rear joining region 11t2 ', that is, the shape of the central placement region 11s1 and the pair of outer placement regions 11s2, 11s2 are arbitrary.

  The central arrangement region 11 s 1 includes the absorbent polymer 14, and has a gap G 11 where the absorbent polymer 14 does not exist around the region where the absorbent polymer 14 exists, that is, around the central existence region 21. The outer arrangement region 11s2 includes the absorbent polymer 15, and has a gap G12 in which the absorbent polymer 15 does not exist around the region where the absorbent polymer 15 exists, that is, outside the width direction W in the outer presence region 22. In the present embodiment, each gap is formed in a band shape having a substantially constant width in the in-plane direction. For example, the width is preferably 0.5 to 6 mm, and more preferably 1 to 4 mm. If the width is too small, the amount of the absorbent polymer biting into the joining region cannot be ignored, and if the width is too large, the absorbent polymer cannot be mounted sufficiently.

  The boundary between the gap G11 and the central existence area 21 and the boundary between the gap G12 and the outer existence area 22 are set depending on the amount of the absorbent polymer. That is, where the maximum basis weight of the absorbent polymers 14 and 15 is Mx, the basis weight of the absorbent polymers 14 and 15 is 1 / n (where n is a positive real number, for example, n = 3). Is the boundary. For example, if the maximum basis weight of the absorbent polymer 14 is Mx21, the boundary between the gap G11 and the center existing region 21 is a location where the basis weight of the absorbent polymer 14 is Mx21 / n at the periphery of the center existing region 21. Is the boundary. This boundary is an edge of the central existence region 21 and an edge of the gap G11. Similarly, assuming that the maximum basis weight of the absorbent polymer 15 is Mx22, the gap G12 and the outer existence region 22 are bordered on the periphery of the outer existence region 22 where the basis weight of the absorbent polymer 15 is Mx22 / n. And This boundary is an edge of the outer region 22 and also an edge of the gap G12.

  The 1st absorption layer 11 is provided with the center arrangement | positioning area | region 11s1 containing the center presence area | region 21 and the space | gap G11, and a pair of outer side arrangement | positioning area | regions 11s2 and 11s2 containing the outer side presence area | region 22 and the space | gap G12. Here, if the view with respect to the 1st absorption layer 11 is changed, the 1st absorption layer 11 is provided with the presence area | region PEA in which an absorptive polymer exists, and the non-existence area | region NPA in which an absorptive polymer does not exist. In the present embodiment, as shown in FIG. 6, the first absorbent layer 11 includes a central existence region 21 including the absorbent polymer 14 as the existence region PEA and a pair of outer existence regions 22 including the absorbent polymer 15. 22 and a pair of non-existing regions 31, 31 that do not include an absorbent polymer as the non-existing region NPA, a front non-existing region 32, and a rear non-existing region 32 ′. One and the other of the pair of non-existing regions 31 and 31 are located between the center existing region 21 and one and the other of the pair of outer existing regions 22 and 22, respectively. The front non-existing region 32 and the rear non-existing region 32 ′ are respectively located in front and rear outer regions in the longitudinal direction L of the center existing region 21. In each of the pair of non-existing regions 31, 31 and the front non-existing region 32 and the rear non-existing region 32 ', there is no absorbent polymer. However, “absence” and “absence” of the absorbent polymer are not only when there is no absorbent polymer, but compared with the maximum basis weight of the absorbent polymer in the region where the absorbent polymer is “present”. The absorbent polymer having a basis weight of about 0 to 5% can be included (the same applies throughout this specification).

  In the first absorption layer 11, as an example of the size of the central existence region 21, the width in the width direction W is the size of one in the center when the first absorption layer 11 is divided into approximately three equal parts in the width direction W. In the longitudinal direction L, the first absorbent layer 11 has a size corresponding to six in the center when the longitudinal direction L is divided into approximately eight equal parts. In the center existing region 21, it is preferable that the absorbent polymer 14 is distributed with a substantially uniform basis weight. For example, the central existence region 21 has a substantially similar shape that is slightly smaller than the central arrangement region 11s1 by the gap G11. As an example of the size of each outer region 22, in the width direction W, it is the size of one on each side when the first absorption layer 11 is divided into approximately three equal parts in the width direction W, and the longitudinal direction L Then, it is the magnitude | size for six pieces of the center when the 1st absorption layer 11 is divided into about eight equally in the longitudinal direction L. In each outer region 22, it is preferable that the absorbent polymer 15 is distributed with a substantially constant basis weight. Each outer region has, for example, a substantially similar shape that is slightly smaller than the outer region 11s2 by the gap G12. In the width direction W, the ratio of the width of the central existence region 21 to the width of each outer existence region 22 is 1.2 to 2: 1. Here, the boundary between the center existing region 21 and the non-existing region 31 is the same as the boundary between the region where the absorbent polymer 14 exists and the gap G11. This boundary is the edge E11 of the central existence area 21 and also the edge of the non-existence area 31. The boundary between the outer existence region 22 and the non-existence region 31 is the same as the boundary between the region where the absorbent polymer 15 exists and the gap G12. This boundary is the edge E12 of the outer existence area 22 and also the edge of the non-existence area 31.

  The gaps G01 and G02 are spaces surrounded by the liquid permeable sheets 11a and 11a 'of the first absorbent layer 11 and the inner and outer wall surfaces (surface sheet 2) of the compressed groove 5, respectively. The gaps G04 and G05 are respectively surrounded by the liquid-permeable sheet 11a (including the joining region 11t1) of the first absorption layer 11 and the inner and outer wall surfaces (surface sheet 2) of the compressed groove 6 (or 6 ′). Space. The gap G03 is a space surrounded by the top sheet 2 and the bonding region 11t1.

  Next, the second absorption layer 12 will be further described with reference to FIGS. 2 and 7 to 8. 7 is a plan view of the second absorption layer 12, and FIG. 8 is a sectional view taken along line VIII-VIII of the second absorption layer 12 in FIG. In addition, in FIG. 7, the position in planar view of the pressing groove 5, the front pressing groove 6, and the back pressing groove 6 'is described virtually.

  As shown in FIGS. 7 to 8, in the second absorbent layer 12, the space formed between the skin-side liquid-permeable sheet 12 a and the non-skin-side liquid-permeable sheet 12 a ′ is an absorbent polymer. And a mixture 16 of liquid retentive material. The second absorption layer 12 includes a thick region 12T having a substantially rectangular shape with rounded corners in the center in the width direction W and the longitudinal direction L, and a middle region having a substantially annular shape surrounding the thick region 12T. 12S and the thin area | region 12R which has the external shape of the 2nd absorption layer 12 in the substantially cyclic | annular form surrounding the circumference | surroundings of the inside area | region 12S. The thickness of the thick region 12T in the thickness direction T is the largest, the thickness of the thin region 12R in the thickness direction T is the thinnest, and the thickness of the middle region 12S in the thickness direction T is increased from the thin region 12R. The thickness gradually increases toward the region 12T. Therefore, the 2nd absorption layer 12 has a middle-high structure (example: the bulk of a central part is high). In the present embodiment, in the width direction W, in plan view, the thick region 12T is generally a region corresponding to the central existence region 21, and the thin region 12R is a region corresponding to the outer existence region 22, The region 12S is a region corresponding to the non-existing region 31.

  One and the other of the pair of compressed grooves 5 are positioned in one and the other of the pair of non-existing regions 31 in the width direction W, respectively, and are separated from the center existing region 21 and the pair of outer existing regions 22. Yes. Therefore, in the width direction W, the inner edge E01 and the outer edge E02 of the squeezing groove 5 exist between the edge E11 of the central existence area 21 and the edge E12 of the outer existence area 22. . Preferably, one and the other of the pair of compressed grooves 5 are located in the pair of joining regions 11t1 and 11t1 in the width direction W, respectively. Therefore, preferably, in the width direction W, the inner edge E01 and the outer edge E02 of the compressed groove 5 exist between the inner edge E21 and the outer edge E22 of the joining region 11t1. Yes.

  In this Embodiment, as shown in FIGS. 2-4, the pressing groove 5 is located near the center presence area | region 21 in the non-existence area | region 31, and is located far from the outer presence area | region 22. As shown in FIG. In the width direction W, the distance d11 between the edge E01 of the pressing groove 5 facing each other and the edge E11 of the center existing area 21 is the distance between the edge E02 of the pressing groove 5 facing each other and the edge E12 of the outer existing area 22 shorter than d12 (d11 <d12). These distances in the width direction W are measured, for example, on the width direction center line CW. When the squeezing groove 5 is located close to the central existence area 21 and far from the outer existence area 22, the absorbent polymer 14 in the central existence area 21 is preferentially present in the squeezing groove 5 over the absorbent polymer 15 in the outer existence area 22. It is preferable because it can absorb excrement. Details thereof will be described below.

  FIG. 9 is a cross-sectional view for explaining the operation of the absorbent article 1. In this figure, the area | region of the pressing groove 5 vicinity containing the 1st absorption layer 11 is shown. FIG. 9A shows a state before excrement S0 is excreted, and FIG. 9B shows a state when excrement S0 is excreted. However, here, the thickness of the second absorption layer 12 in the thickness direction T is constant.

As shown to Fig.9 (a), in the absorbent article 1, the pressing groove 5 is located in the non-existing area | region 31, and is spaced apart from the center presence area | region 21 and the outer side presence area | region 22, and the width direction W In FIG. 5, it is located closer to the central existence area 21 than the outer existence area 22 (d11 <d12). Therefore, in the non-existing region 31 divided in the width direction W by the compressed groove 5, the region (G01 + G11) which is a region having no absorbent polymer is small in the region on the center existing region 21 side, and the region on the outer existing region 22 side Then, the space | gap (G02 + G12) which is an area | region where an absorptive polymer does not exist becomes large. At this time, the thickness T01 of the central existence region 21 in the first absorption layer 11 and the thickness T02 of the outer existence region 22 are substantially the same.
Thus, since the space | gap (G01 + G11) by the side of the center presence area | region 21 is small, as shown in FIG.9 (b), the excrement S1 excreted by the pressing groove 5 among the excretion S0 is absorption of the center presence area | region 21. The polymer 14 is easily absorbed. Therefore, the excrement S2 is preferentially absorbed by the absorbent polymer 14 in the central existence region 21 through the small gap (G01 + G11), and thus is absorbed by the absorbent polymer 14 in the central existence region 21 in a large amount. As a result, the volume of the absorbent polymer 14 in the central region 21 is significantly expanded. Thereby, the wall surface 5W1 on the side of the center existing region 21 of the compressed groove 5 rises rapidly in the thickness direction T to form a steep wall surface 5W1. At that time, the thickness T11 of the central existence region 21 in the first absorption layer 11 is larger than the thickness T12 of the outer existence region 22 (T11> T12). Therefore, the excretion S0 excreted at the urination point in the substantially central portion of the central existence area 21 is easily guided from the central existence area 21 to the pressing groove 5 through the steep wall surface 5W1, and accumulates in the pressing groove 5. (S1). As a result, the excrement S4 can be easily diffused and absorbed from the bottom (high density portion 5t) of the compressed groove 5 to the second absorption layer 12 on the non-skin side.
On the other hand, since the excrement S1 excreted in the compressed groove 5 passes through a large gap (G02 + G12), it is difficult to be absorbed by the absorbent polymer 15 in the outer region 22. At that time, the absorbent polymer 15 in the outer region 22 does not absorb the excrement S1 so much that its volume does not expand so much. Thereby, the wall surface 5W2 on the outer side presence region 22 side in the compressed groove 5 does not rise so much in the thickness direction T, and forms a gentle wall surface 5W2. Therefore, the excrement S1 accumulated in the compressed groove 5 is accumulated while spreading on the gentle wall surface 5W2 side on the outer side existing region 22 side, that is, while being spread outside the width direction W in the compressed groove 5. As a result, more excrement S1 can be accumulated on the outer side of the squeezing groove 5 as compared with the case where it is accumulated in a normal squeezing groove. Thereby, the surface area which contact | connects the surface sheet 2 of the absorbent article 1 can be enlarged, and the excrement S3 can be absorbed using the area | region of the outer side of the pressing groove 5 where the excretion S1 does not spread | diffuse easily. Therefore, the excrement S3 can be easily absorbed into the first absorption layer 11 in the width direction W through the top sheet 2.
In this way, not only facilitates the diffusion of the excrement S4 to the second absorption layer 12 in the thickness direction T through the compressed groove 5, but also diffuses the excretion S3 to the first absorption layer 11 in the width direction W. Therefore, it is possible to improve the absorption speed of the absorbent article 1 as a whole (for example, twice or more that of the current product) and to easily maintain the smooth feeling of the surface of the topsheet 2.

  The distance d11 is preferably 1 mm to 10 mm, and more preferably 1.5 mm to 3 mm. The reason why the distance d11 is 1 mm or more is to prevent the compressed groove 5 from being blocked when the absorbent polymer 14 in the center existing region 21 absorbs excrement and expands. When the distance d11 is 10 mm or less, excretion is preferentially absorbed by the absorbent polymer 14 in the central existing region 21 rather than the absorbent polymer 15 in the outer existing region 22, and the side wall on the central existing region 21 side rises more steeply. (If the distance is too large, the side wall on the center existing region 21 side is difficult to rise sharply). On the other hand, the distance d12 is preferably 2 mm to 15 mm, and more preferably 2 mm to 5 mm under the condition of d12> d11. The distance d12 is not less than 2 mm because the absorbent polymer 15 in the outer region 22 absorbs excretion preferentially in the absorbent polymer 14 in the central region 21 rather than the absorbent polymer 15 in the outer region 22, while the absorbent polymer 15 in the outer region 22 excretes the waste. This is to prevent the compressed groove 5 from being blocked by absorbing and expanding. The reason why the distance d12 is 15 mm or less is to ensure that the excrement is absorbed by the absorbent polymer 15 in the outer region 22. In the present embodiment, for example, the distance d11 is 1.5 mm and the distance d12 is 2.5 mm.

  As a preferable form in the present embodiment, the joining region 11t1 extends to both sides in the width direction W of the pressing groove 5 in plan view, and the pressing groove 5 is close to the central existence region 21 and far from the outer existence region 22 in the joining region 11t1. Located in. That is, in the width direction W, the distance d21 between the inner edge E21 in the bonding region 11t1 and the inner edge E01 in the pressing groove 5 is equal to the outer edge E22 in the bonding region 11t1 and the outer edge in the pressing groove 5. It is shorter than the distance d22 with E02 (d21 <d22). In the width direction W, the absorbent article 1 having the above configuration can hold and confine the absorbent polymers 14 and 15 in the liquid permeable sheets 11a and 11a '. And when the absorptive polymers 14 and 15 absorb excrement and swell, the liquid-permeable sheets 11a and 11a ′ suppress the swelling of the absorptive polymers 14 and 15 in the width direction W, and the compressed grooves 5 Blocking can be suppressed.

In the present embodiment, the forward pressing groove 6 is located in the front non-existing area 32 in the longitudinal direction L, and is separated from the central existing area 21 and the pair of outer existing areas 22. And in the longitudinal direction L, the inner edge E03 and the outer edge E04 of the front pressing groove 6 are the edge E31 of the center existing region 21 and the edge in the longitudinal direction L of the first absorbent layer 11 (front It exists between the outer edge E42) of the non-existing region 32. And as a preferable form in this Embodiment, the front pressing groove 6 is located near the center presence area | region 21 in the front non-existence area | region 32. FIG. That is, in the longitudinal direction L, the distance d31 between the edge E03 of the front pressing groove 6 facing each other and the edge E31 of the center existing area 21 is the outside of the edge E04 of the front pressing groove 6 facing each other and the front non-existing area 32. Shorter than the distance d32 from the edge E42 (d31 <d32). These edges and the like are measured on the longitudinal center line CL in the longitudinal direction L. In addition, it has the same structure as the front pressing groove 6 and the front nonexistence area | region 32 also about the rear pressing groove 6 'and back nonexistence area | region 32'.
In the absorbent article 1 having the above configuration, the front compressed groove 6 is located in the front non-existing region 32, is separated from the central existing region 21 and the outer existing region 22, and is close to the central existing region 21 in the longitudinal direction L. Located in. Therefore, in the front non-existing region 32 divided in the longitudinal direction L by the front compressed groove 6, the region (G11 + G04) is small in the region on the center existing region 21 side, and the region (G05 + (longitudinal direction L) in the opposite side region is small. The gap between the topsheet 2 and the second absorbent layer 12 outside the gap G05 in the sheet is increased.As a result, since the gap on the center existing area 21 side is small, excretion excreted in the front squeezing groove 6 The object is preferentially absorbed by the absorbent polymer 14 in the central existence region 21. Therefore, the absorbent polymer 14 in the central existence region 21 expands significantly, and the wall surface on the central existence region 21 side rises rapidly in the thickness direction T. In this way, the excretion excreted at the urination point at the substantially central portion of the central existence region 21 is guided to the front pressing groove 6 through the steep wall surface, and the front pressing groove 6 is formed. It can be easily diffused and absorbed from the bottom to the non-skin-side second absorbent layer 12. On the other hand, in the region opposite to the center existing region 21 across the front compressed groove 6, the wall surface of the front compressed groove 6 is in the thickness direction T. Therefore, the excrement accumulated in the forward squeezing groove 6 is accumulated while spreading toward the gentle wall surface, and is in contact with the surface sheet 2 of the absorbent article 1. The area outside the forward squeezing groove 6 where excrement is difficult to diffuse can be effectively used for absorption of excrement, and therefore the first absorption in the longitudinal direction L via the top sheet 2. The excrement can be easily absorbed into the layer 11. Thus, not only the excrement is easily diffused into the second absorption layer 12 in the thickness direction T along the forward pressing groove 6, but also the first in the longitudinal direction L. It is easy to diffuse excrement to absorption layer 11 of In addition, it is possible to improve the absorption speed as a whole of the absorbent article 1 and to easily maintain the smooth feeling of the surface.In the case of the rear compressed groove 6 ′ and the rear non-existing region 32 ′, the front compressed groove 6 and The same effect as the case of the front non-existing region 32 is obtained.

  As a preferable form in the present embodiment, the front joining region 11t2 extends on both sides in the longitudinal direction L of the front pressing groove 6 in a plan view. And the front pressing groove 6 is located near the center presence area | region 21 in the front junction area | region 11t2. That is, in the longitudinal direction L, the distance d41 between the inner edge E41 in the front joining region 11t2 and the inner edge E03 in the front pressing groove 6 is equal to the outer edge E42 and the front pressing groove 6 in the front joining region 11t2. It is shorter than the distance d42 with the outer edge E04 (d41 <d42). In the longitudinal direction L, the absorbent article 1 having the above configuration can hold and confine the absorbent polymer 14 in the liquid permeable sheets 11a and 11a '. When the absorbent polymer 14 absorbs excrement and swells, the liquid-permeable sheets 11a and 11a ′ suppress the swelling of the absorbent polymer 14 in the longitudinal direction L and prevent the front compressed groove 6 from being blocked. it can. Therefore, the penetration | invasion to the front junction area | region 11t2 of the absorptive polymer 14 can be suppressed. In addition, about the case of the back pressing groove 6 'and the back joining area | region 11t2', it has the same structure as the case of the front pressing groove 6 and the front joining area | region 11t2, and there exists the same effect.

  As a preferred embodiment in the present embodiment, in the longitudinal direction L, the distance (d31-d41) between the inner edge E41 of the front joint region 11t2 and the edge E31 of the center existing region 21 facing the edge E41 is The distance d41 between the inner edge E41 of the front joining region 11t2 and the inner edge E03 of the front pressing groove 6 is shorter. In the first absorbent layer 11, the absorbent article 1 having the above configuration has a short distance between the inner edge E41 of the front joining region 11t2 and the edge E31 of the central existence region 21, and thus the central existence region 21 The region in which the absorbent polymer 14 swells in the longitudinal direction L can be reduced. As a result, the absorbent polymer 14 can be swollen further in the thickness direction T, and the wall surface on the side of the center existing region 21 of the front squeezing groove 6 can be made steeper. Note that the rear pressing groove 6 'and the rear joining region 11t2' also have the same configuration as the front pressing groove 6 and the front joining region 11t2, and exhibit the same effects.

  As a preferable form in the present embodiment, in the thickness direction T, when the thickness of the second absorbent layer 12 is a, and the penetration depth of the compressed groove 5 into the second absorbent layer 12 is b, b Satisfies (a / 2) <b <a. FIG. 10 is a cross-sectional view illustrating the relationship between the depth of the compressed groove and the thickness of the second absorption layer. Note that the thickness a of the second absorbent layer 12 and the penetration depth b into the second absorbent layer 12 in the compressed groove 5 are the width direction of the high-density portion 5t (bottom) of the compressed groove 5 in plan view. It is assumed that measurement is performed at the position of the center of W, and in the present embodiment, measurement is performed on the center line CW in the width direction. As shown in FIG. 10, the absorbent article 1 having the above configuration can easily draw the excrement S from the squeezing groove 5 into the second absorbent layer 12, and the drawn excrement S can be drawn into the second absorbent layer 12. It is possible to facilitate diffusion in the in-plane direction of the second absorbent layer 12 as well as the non-skin side. Thereby, it is possible to improve the absorption speed of the absorbent article 1 as a whole, and more reliably achieve the effect of facilitating maintaining the smooth feeling of the surface. At this time, if the value of b is too small (b ≦ (a / 2)), the area of the wall surface (side surface) of the compressed groove 5 in the second absorption layer 12 becomes small, and the second absorption from the wall surface. It becomes difficult for excrement to diffuse into the layer 12. As a result, the amount of excrement drawn into the second absorbent layer and the amount of excreted excreted diffused in the in-plane direction of the second absorbent layer are reduced. Furthermore, if the value of b is too small, the absorber 4 has a low strength as a whole and is easily kinked. On the other hand, if the value of b is too large (a ≦ b), the compressed groove 5 substantially penetrates the second absorbent layer. As a result, there is a possibility that excrement cannot be diffused from the bottom portion (high density portion 5t) of the compressed groove 5 to the second absorbent layer 12, or may leak out of the absorbent article.

  As a preferred mode in the present embodiment, in the second absorption layer 12, in the width direction W, the thick region 12T is generally a region corresponding to the central existence region 21 and the thin region 12R exists on the outside in a plan view. This is a region corresponding to the region 22, and the middle region 12 </ b> S is a region corresponding to the non-existing region 31. Therefore, the 2nd absorption layer 12 has a middle-high structure (example: the bulk of a central part is high). In the absorbent article 1 having the above-described configuration, the height position of the center existing area 21 with respect to the non-skin side surface in the first absorbent layer 11 (example: bottom surface of the center existing area 21) is the outer existing area 22. It becomes higher than the height position (example: bottom surface of the outer region 22). Thereby, when excrement is excreted in the squeezing groove 5, the effect that the central existence region 21 absorbs much excretion and the wall surface on the central existence region 21 side of the squeezing groove 5 rises can be further enhanced (more). It is possible to make a steep rise early and preferentially). In addition, the effect that the outer region 22 does not absorb much excrement and the wall surface on the outer region 22 side of the squeezing groove 5 has a gentle slope can be further enhanced.

  As a preferable form in the present embodiment, in the region surrounded by the pair of pressing grooves 5, 5, the front pressing groove 6 and the rear pressing groove 6 ′, the fiber density of the topsheet 2 is larger than the surrounding region. high. Therefore, in the surface sheet 2, the fiber density in the region corresponding to the central existence region 21 is higher than the fiber density in the region corresponding to each of the pair of outer existence regions 22. The absorbent article 1 having the above-described configuration can facilitate the preferential drawing of excrement into a region corresponding to the center existing region 21 having a high fiber density in the topsheet 2. Thereby, the absorptive polymer 14 in the center existing region 21 can be preferentially expanded over the absorptive polymer 15 in the outer existing region 22, and the wall surface on the side of the center existing region 21 of the squeezing groove 5 is rapidly raised. be able to. On the other hand, excretion can be prevented from being preferentially drawn into the region corresponding to the outer region 22 having a low fiber density. Thereby, the swelling of the absorbent polymer 15 in the outer region 22 can be suppressed more than the absorbent polymer 14 in the central region 21, and the wall surface on the outer region 22 side of the compressed groove 5 can be gently inclined. .

  As a preferable form in this Embodiment, the pressing groove 5 contains the high pressing part 41 with the deep depth of the thickness direction T, and the low pressing part 42 with the shallow depth of the thickness direction T, and a high pressing part. 41 and the said low pressing part 42 are formed in order by turns. FIG. 11 is a plan view schematically showing the configuration of the pressing groove 5 (the front pressing groove 6, the rear pressing groove 6 '). In the absorbent article 1 having the above-described configuration, excrement is diffused into a deep region in the thickness direction T of the second absorbent layer 12 by the high-pressure squeezed part 41, and the thickness of the second absorbent layer 12 by the low-pressure squeezed part 42. Excrement can be diffused in a shallow region in the direction T. That is, since excrement can be diffused to regions of different depths of the second absorption layer 12, the second absorption layer 12 can be used efficiently in the thickness direction T. Thereby, the circulation of excrement in the pressing groove 5 (the front pressing groove 6, the rear pressing groove 6 ′) is improved, that is, excretion through the pressing groove 5 (the front pressing groove 6, the rear pressing groove 6 ′). The absorption speed of things can be improved. Therefore, it is possible to further improve the absorption rate of the absorbent article as a whole and to easily maintain the smooth feeling of the surface.

<Distance between edges>
The distance between each edge was measured by the following method. (1) The absorbent article is cut out to a size of 20 × 40 mm around the measurement target region as a sample. 2) A 360-degree scan of the sample is performed using an X-ray fluoroscope FLEX-M863. Specifically, every time the sample is rotated 0.2 degrees, a fluoroscopic image is taken to obtain 360 degrees, that is, 1800 fluoroscopic images, and the obtained 1800 fluoroscopic images are connected. Together, create a 3D image. 3) A cross-sectional view including the edge of the measurement object was extracted from the 3D image, and the distance between the edges was measured from the extracted cross-sectional view.
<Depture groove depth>
The depth of the compressed groove was measured by the following method. (1) A sample having a predetermined size including the compressed groove is cut out from the absorbent article. (2) Three-dimensional measuring instrument (High-precision shape measurement system (including high-precision stage: KS-1100) manufactured by Keyence Corporation), high-speed and high-precision CCD laser displacement meter (controller: LK-G3000V set, sensor) Head: including LK-G30) and measuring the cross-sectional shape of the sample. (3) Image data processing is performed on the measured cross-sectional shape to obtain a cross-sectional contour line subjected to smoothing processing. (4) The contour line of the cross-sectional shape of the squeezing groove is specified based on the obtained contour line, and the depth of the squeezing groove is obtained based on the dimensions of each part obtained from the cross-sectional contour line of the squeezing groove.
<Sheet weight of sheet>
The basis weight of each sheet (including the absorbent layer) was measured by the following method. (1) A part having a size of 5 cm × 5 cm is cut out from the sheet and used as a sample. (2) The sample is dried in an air atmosphere of 100 ° C. or higher. (3) Measure the mass of the sample. (4) The basis weight of the sample is calculated by dividing the measured mass value by the area of the sample. (5) A value obtained by averaging the basis weights of 10 samples is defined as the basis weight of the sheet.
<Sheet thickness>
The thickness of each sheet (including the absorption layer) was measured by the following method. (1) A part having a size of 5 cm × 5 cm is cut out from the sheet and used as a sample. (2) The sample is dried in an air atmosphere of 100 ° C. or higher. (3) using a thickness gauge with a measuring element of 15cm ² (the Ltd. Daiei Chemical Seiki Seisakusho Model FS-60DS), to measure the thickness of the sheet under the conditions of measuring load of 3 g / cm ^2. (4) The thickness of three places is measured with one sample, and the average value of the thicknesses of the three places is taken as the thickness of the sheet. Note that the thickness of the sheet may be obtained from a 3D image obtained by an X-ray fluoroscopic image.
<Fiber density of sheet>
The fiber density of each sheet (including the absorbent layer) was measured by the following method. (1) The basis weight of the sheet and the thickness of the sheet are determined by the above method. (2) The fiber density of the sheet is calculated by dividing the weight of the sheet by the thickness of the sheet.

(Example)
The absorbent article 1 of this Embodiment was prepared as a sample of an Example. As a sample of the comparative example, in the width direction, the position of the compressed groove is in the center of the non-existing region, neither the central existing region nor the outer existing region, and an absorptivity that is approximately equal to both Articles (current product) were prepared. However, in the samples of Example 1 and Comparative Example 1, the absorbent layer corresponding to the first absorbent layer 11 includes an absorbent polymer having a basis weight of 100% with respect to the basis weight of the first absorbent layer 11, and the second The absorbent layer corresponding to the absorbent layer 12 is a product containing an absorbent polymer having a basis weight of 30 to 70% with respect to the basis weight of the second absorbent layer 12. On the other hand, in the samples of Example 2 and Comparative Example 2, the absorbent layer corresponding to the first absorbent layer 11 contains an absorbent polymer having a basis weight of 100% with respect to the basis weight of the first absorbent layer 11, and the second The absorbent layer corresponding to the absorbent layer 12 is made of a water-absorbent fiber pulp and does not contain an absorbent polymer. And the absorption rate (absorption time taken to absorb physiological saline) of the sample of the example and the sample of the comparative example was measured. FIG. 12 is a schematic diagram for explaining a measuring method.

The following method was used for measuring the absorption rate (absorption time). (1) A flat plate jig with a cylinder in which a cylinder 101 having an inner diameter of 30 mm is vertically coupled to the center of a substantially rectangular flat plate 102 is prepared. An opening having an inner diameter of 30 mm is formed at the joint between the flat plate 102 and the cylinder 101. (2) The sample 104 (absorbent article) is placed on the base 103 and the flat plate 102 of the flat plate jig with a cylinder is placed on the sample 104. (3) A predetermined load P is applied to the flat plate 102 so that a predetermined pressure is applied to the absorber of the sample 104 between the base 103 and the flat plate 102. The predetermined pressure is 0.005 to 0.015 kg / cm ² with respect to the absorbent body of the sample 104, preferably 0.007 to 0.00 when the wearer of the sample 104 is assumed to be in a standing position and a middle waist. A load P is applied to the flat plate 102 so that a pressure of 012 kg / cm ² is applied. Also, if the wearer of the sample 104 is assumed state a locus, 0.03~0.2kg / cm ² with respect to the absorption of the sample 104, preferably at a pressure of 0.05~0.1kg / cm ² The load P is applied to the flat plate 102 so that is applied. (4) A 0.9% saline solution Q is dropped onto the sample 104 from above the cylinder 101 (simulating the wearer's urination). An amount of 35% to 50%, preferably 40 to 45%, of the absorption capacity of the absorber of the sample 104 is defined as a single dropping amount at a dropping rate of 10 g / second. At that time, the absorption time (second) until the physiological saline Q on the surface of the sample 104 is absorbed by the sample 104 and disappears from the surface of the sample 104 is measured. (5) After 5 minutes, the physiological saline Q of (4) is dropped and the absorption time is measured again. The absorption rate (absorption amount of physiological saline per unit time) can be calculated from the dripping amount / absorption time. The comparison of the absorption rate may be a comparison of the absorption rate by comparing the absorption time at the same drop amount, or the absorption rate calculated from the drop amount / absorption time may be directly compared. Here, the absorption speed is compared by comparing the absorption time at the same drop amount. In that case, it can be said that the absorption speed is larger as the absorption time is shorter.

The measurement results of the absorption time are as follows.

  When the first physiological saline Q was dropped (corresponding to the first urination), the absorbent polymer in the first absorbent layer 11 expanded. As a result, in the samples of Examples 1 and 2, the central existence region 21 of the first absorption layer 11 swelled greatly, and the outer existence region 22 did not swell very much. Thereby, the angle which the wall surface by the side of the center presence area | region 21 of the pressing groove 5 comprises with respect to the back surface sheet 3 and the angle which the wall surface of the outer surface area 22 side of the pressing groove 5 makes with respect to the back surface sheet 3 differed. That is, the angle formed by the wall surface on the central existence region 21 side is large, and the angle formed by the wall surface on the outer existence region 22 side is not so large. On the other hand, in the samples of Comparative Examples 1 and 2, the angle formed by the wall surface on the central existence region side was almost the same as the angle formed by the wall surface on the outer existence region side. Thereby, in the sample of Examples 1 and 2, compared with the sample of Comparative Examples 1 and 2, respectively, the dropped physiological saline Q easily flows to the pressing groove 5 quickly. Absorption time was short at the time of the second dropping (absorption speed was fast). In particular, the sample of Example 1 having a large absorption capacity improved the absorption rate by 1.5 times or more under the standing and middle waist conditions and twice or more under the sitting condition as compared with the sample of Comparative Example 1. Further, when the second physiological saline Q is dropped (corresponding to the second urination), the absorbent polymer in the first absorbent layer 11 further expands and gel blocking starts to occur. Therefore, in the samples of Examples 1 and 2, the angle formed by the wall surface on the central existence region 21 side was larger, and was greatly different from the angle formed by the wall surface on the outer existence region 22 side. On the other hand, in the samples of Comparative Examples 1 and 2, the difference between the angle formed by the wall surface on the central existence region side and the angle formed by the wall surface on the outer existence region side was smaller than those of the samples of Examples 1 and 2, respectively. Thereby, compared with the sample of Comparative Examples 1 and 2, the absorption rate of the samples of Examples 1 and 2 was improved more than twice in any of the standing and middle waist conditions and the sitting condition. . Thus, regardless of whether or not the absorption layer corresponding to the second absorption layer 12 contains an absorbent polymer, the sample of the example clearly has an absorption rate compared to the sample of the comparative example (current product). It was found that the absorption rate was more than doubled especially during the second urination. That is, it was found that the present absorbent article 1 has an absorption rate more than twice as high as that of the current product during the second urination. It has been found that such a high absorption rate makes it easier to maintain the smoothness of the surface in the sample of the example.

  The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined and changed within a range not departing from the object and spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Top sheet 3 Back sheet 4 Absorber 5 Squeeze groove 11 1st absorption layer 12 2nd absorption layer 21 Center presence area 22 Outside presence area 31 Non-existence area

Claims (9)

It has a longitudinal direction, a width direction, and a thickness direction, and comprises a top sheet and an absorbent body located on the non-skin side of the top sheet, and the absorbent body includes a first absorbent layer and the first absorbent layer. A second absorbent layer laminated on the non-skin side of the absorbent layer, and extending in the longitudinal direction and arranged at intervals in the width direction, the top sheet, the first absorbent layer, and the first absorbent layer 2 is an absorbent article comprising a pair of compressed grooves in which the absorbent layer of 2 is compressed,
The first absorption layer includes
A central presence region located in the center of the width direction and in which an absorbent polymer exists;
A pair of outer existing regions located on both outer sides of the central existing region in the width direction, and in which an absorbent polymer exists;
A pair of non-existing regions that are located between the central presence region and the pair of outer presence regions and in which no absorbent polymer exists,
The boundary between the center existing area and the non-existing area is such that the basis weight of the absorbent polymer in the center existing area in contact with the non-existing area is 1 / of the maximum value of the basis weight of the absorbent polymer in the center existing area. The boundary between the outer existence area and the non-existence area is a basis weight of the absorbent polymer in the outer existence area that is in contact with the non-existence area. It is a point that is 1/3 of the maximum amount,
One and the other of the pair of compressed grooves are located in one and the other of the pair of non-existing regions in the width direction, respectively, and are separated from the center existing region and the pair of outer existing regions,
In the width direction, the distance between the edge of the pressing groove facing each other and the edge of the center existing area is that the portion of the pressing groove adjacent to the center existing area in the width direction exists in the longitudinal direction. in at least a portion of the position, rather shorter than the distance between the edge of the outer existence region and edge of the compression groove facing each other, at rest, that is equal,
Absorbent article. The first absorption layer includes
A liquid-permeable sheet that wraps the absorbent polymer contained in the first absorbent layer;
In the non-existing region, the skin side surface of the liquid-permeable sheet and the non-skin side surface have a joined region joined together,
The joining region extends on both sides in the width direction of the compressed groove in a plan view,
In the width direction, the distance between the inner edge in the joint region and the inner edge in the pressing groove is such that the portion of the pressing groove adjacent to the center existing region in the width direction is in the longitudinal direction. in at least a portion of the position at which, rather shorter than the distance between the outer edge at the edge and the compressed groove outside in the joining region, at rest, that is equal,
The absorbent article according to claim 1. The first absorbent layer is located outside the longitudinal front and rear in the central presence region, and includes a front non-existence region and a rear non-existence region where no absorbent polymer is present,
The front pressing groove and the rear pressing groove in which the top sheet, the first absorbent layer, and the second absorbent layer are squeezed are provided extending in the width direction and arranged at intervals in the longitudinal direction,
The boundary between the front non-existing region and the rear existing region and the central existing region is such that the basis weight of the absorbent polymer in the central existing region in contact with the front non-existing region and the rear existing region is equal to that of the central existing region. It is a location that is 1/3 of the maximum basis weight of the absorbent polymer,
The front squeezing groove and the rear squeezing groove are located in the front non-existing region and the rear non-existing region, respectively, and are separated from the central existing region and the pair of outer existing regions,
In the longitudinal direction, the distance between the edge of the front pressing groove and the edge of the center existing area facing each other is such that a portion of the front pressing groove adjacent to the center existing area in the longitudinal direction is the width direction. in at least a portion of the positions present in, rather shorter than the distance between the outer edge of the edge between the front non-existing area of the front compressed grooves facing each other, at rest, rather equal,
In the longitudinal direction, the distance between the edge of the rear pressing groove and the edge of the center existing area facing each other is such that the portion of the rear pressing groove adjacent to the center existing area in the longitudinal direction is the width direction. in at least a portion of the positions that exist, rather shorter than the distance between the outer edge of the rear non-existing region and the end edge of the rear compression groove facing each other, at rest, that is equal,
The absorbent article according to claim 1 or 2. The first absorption layer includes
A liquid-permeable sheet that wraps the absorbent polymer contained in the first absorbent layer;
In the front non-existing region and the rear non-existing region, each has a front joining region and a rear joining region in which the skin side surface and the non-skin side surface of the liquid-permeable sheet are joined to each other,
The front joint region and the rear joint region extend in both sides in the longitudinal direction of the front pressing groove and the rear pressing groove in a plan view,
In the longitudinal direction, the distance between the inner edge in the front joint region and the inner edge in the front squeezing groove is such that the portion of the front squeezing groove adjacent to the central existence region in the longitudinal direction is in at least a portion of the positions that exist in the width direction, the rather short than the distance between the outer edge at the edge and the front compressed grooves of the outer side in the front junction area, at rest, rather equal,
In the longitudinal direction, the distance between the inner edge in the rear joining region and the inner edge in the rear pressing groove is such that the portion of the rear pressing groove adjacent to the center existing region in the longitudinal direction is in at least a portion of the positions that exist in the width direction, the rather short than the distance in the rear junction area and the outer edge to the outer edge of the rear compression groove, at rest, that is equal,
The absorbent article according to claim 3. In the longitudinal direction, the distance between the inner edge in the front joining region and the edge of the central existence region facing the edge is the center existence region in the longitudinal direction of the front squeezing groove. at least a portion of the positions adjacent moiety is present in the width direction, rather shorter than the distance between the inner edge of the inner edge and the front compressed grooves in said front junction area, at rest, equal The
In the longitudinal direction, the distance between the inner edge in the rear joining region and the edge of the central existence region facing the edge is the center existence region in the longitudinal direction of the rear compressed groove. at least a portion of the positions adjacent moiety is present in the width direction, rather shorter than the distance between the inner edge of the inner edge and the rear compression groove in the rear junction area, at rest, equal Yes,
The absorbent article according to claim 4. In the topsheet, the fiber density of the region corresponding to the central existence region is higher than the fiber density of the region corresponding to each of the pair of outer existence regions,
The absorbent article as described in any one of Claims 1 thru | or 5. In the thickness direction, when the thickness of the second absorbent layer is a and the penetration depth of the compressed groove into the second absorbent layer is b, the b is (a / 2) < b <a is satisfied,
The absorbent article as described in any one of Claims 1 thru | or 6. In the second absorption layer, the thickness of the region corresponding to the central existence region is thicker than the thickness of the region corresponding to the outer existence region,
The absorbent article as described in any one of Claims 1 thru | or 7. The squeezing groove includes a high-pressure squeezing portion having a deep depth in the thickness direction and a low-pressure squeezing portion having a shallow depth in the thickness direction, and the high-pressure squeezing portion and the low-pressure squeezing portion are alternately arranged. Formed by,
The absorbent article as described in any one of Claims 1 thru | or 8.

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