TWI741020B - Absorbent articles - Google Patents

Abstract

The present invention provides an absorbent article, which can suppress the clogging of a press groove and increase the absorption speed. The absorbent article (1) is provided with a surface sheet (2), an absorber (4) including a first absorbent layer (11) and a second absorbent layer (12), and has a pressing groove (5) for pressing the surface sheet and the absorber . The first absorbent layer includes: the central existence area (21) in the center where the absorbent polymer exists; the outer outer existence area (22) on the outer side; Existing area (31). The squeeze ditch is located in the non-existing area (31), separated from the central existing area and the outer existing area. The distance between the end edge of the opposing squeeze groove and the end edge of the central existence area is shorter than the distance between the end of the opposing squeeze groove and the end edge of the outer existence area.

Description

Absorbent articles

[0001] The present invention relates to absorbent articles.

[0002] Absorbent articles like light incontinence pads are used to absorb and hold excretion such as urine or menstrual blood excreted by the wearer. Absorbent articles are required to be absorbed quickly regardless of the situation so that the excrement does not leak to the outside. Therefore, technologies to further improve the absorption performance are under development. As such a technique, there is an absorbent article in which an absorber is designed in two layers, for example.　　[0003] The absorbent body is designed as a two-layer absorbent article, as disclosed in Patent Document 1, for example. This absorbent article has a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorber arranged between the surface sheet and the leak-proof sheet. The absorbent system is composed of at least two layers, and at least one layer is a first absorbent layer composed of a liquid-permeable sheet and a super absorbent polymer. The first absorbent body layer and the surface sheet are joined by pressing grooves. In a plan view, the first absorbent body layer has a dispersion area in which a superabsorbent polymer is dispersed on both sides of the press groove. The spreading area includes a spreading area at the center of the absorber and a spreading area on the side of the absorber across the squeeze groove in the width direction. [0004] Here, when the excrement is discharged to the squeeze ditch, the superabsorbent polymer in the central dispersion area and the superabsorbent polymer in the lateral dispersion area swell by absorbing the excrement of the press ditch. Squeezing the squeeze ditch from both sides in the width direction even if the squeezing ditch is clogged. Therefore, in Patent Document 1, a non-dispersed area where the super absorbent polymer is not dispersed is provided between the central dispersion area and the lateral dispersion area of the first absorbent body layer. The non-dispersed area is divided equally in the width direction by the press groove. Therefore, the first absorbent body layer has: among the non-spreading areas divided in the width direction by the press grooves, the area between the press grooves and the central dispersion area, and the area between the press grooves and the lateral dispersion areas, There are substantially no regions of the absorbent polymer of the same size, that is, voids. As a result, even if the super absorbent polymer swells, these voids become buffer areas or swollen portions (gaps), and the swelling portion of the super absorbent polymer is accommodated to prevent clogging of the squeeze groove. [Prior Art Document] [Patent Document] 　　[0005] [Patent Document 1] Japanese Republished List WO2010/107096 Publication

[Problem to be Solved by the Invention] 　　[0006] Furthermore, the absorbent polymer in the dispersion area of the absorbent article of Patent Document 1 absorbs the excrement through the void when the excrement of the squeeze groove is to be absorbed. However, in this case, the voids existing in the excrement absorption path inhibit absorption, so that the absorption speed of the excrement by the absorbent polymer in each dispersion area decreases. When the absorption rate is reduced and the amount of excrement is large, the excrement is not absorbed and tends to remain. The excrement may leak to the outside of the absorbent article before absorbing the excrement in each dispersion area. [0007] Therefore, an object of the present invention is to provide an absorbent article comprising an absorbent body and a pair of squeeze grooves, which can suppress clogging of the squeeze grooves and increase the absorption speed, the absorbent body including a first absorbent having an absorbent polymer Layer and the second absorption layer, the pair of press grooves press the surface sheet, the first absorption layer and the second absorption layer. [Means for Solving the Problem] 　　[0008] The absorbent article of the present invention is as follows. It is an absorbent article, (1) having a longitudinal direction, a width direction, and a thickness direction, and having a surface sheet and an absorber located on the non-skin side of the surface sheet; the absorber includes a first absorbent layer and a laminated layer on the first The second absorbent layer on the non-skin side of the first absorbent layer is provided with a pair of squeezing grooves extending in the longitudinal direction and arranged at intervals in the width direction to squeeze the surface sheet, the first absorbent layer and the second absorbent layer. Absorbent layer; the first absorbent layer includes: a central area in the center in the width direction where the absorbent polymer exists; and a pair of outer sides where the absorbent polymer exists on both outer sides of the central area in the width direction Region; and a pair of non-existent regions located between the aforementioned central existence area and the aforementioned pair of outer existence areas, where the absorbent polymer does not exist; in the aforementioned width direction, one and the other of the aforementioned pair of squeezing grooves are respectively located in the aforementioned Within one and the other of the pair of non-existent areas, separate from the aforementioned central existence area and the aforementioned pair of outer existence areas, and in the width direction, between the edge of the press groove and the end of the central existence area that are opposed to each other The distance is shorter than the distance between the end edge of the pressing groove and the end edge of the outer side existing area that are opposite to each other.　　[0009] This absorbent article is configured as described above, and the squeeze groove is located in the non-existing area, separated from the central existing area and the outer existing area, and in the width direction, is located closer to the central existing area than the outer existing area. Therefore, among the non-existent regions divided in the width direction by the squeeze groove, the voids in the region on the side of the central existing region (regions where the absorbent polymer does not exist substantially) become smaller, and in the region on the outer side of the existing region The gap becomes larger. "As a result, since the voids on the side of the central existence area are small, it is easy for the excrement excreted to the squeeze ditch among the excrement to be absorbed by the absorbent polymer in the central existence area. Therefore, the excrement is preferentially absorbed into the absorbent polymer in the central existing area through the small voids, and is therefore mostly absorbed into the absorbent polymer in the central existing area. As a result, the volume of the absorbent polymer in the central existing region significantly expands. Thereby, the wall surface on the side of the central existing region of the press groove rises sharply in the thickness direction, forming a steep wall surface. Therefore, the excrement excreted at the urination point in the substantially central part of the central existence area is easily induced into the squeeze ditch via the steep wall from the central existence area, and is likely to accumulate in the squeeze ditch. As a result, the excrement can be easily diffused and absorbed from the bottom of the squeeze groove to the second absorption layer on the non-skin side. "On the other hand, the excrement discharged into the squeeze ditch is not easily absorbed into the absorbent polymer in the outer area due to the large gap. At this time, the absorbent polymer in the outer area does not absorb excrement very much, and its volume does not expand much. Therefore, the wall surface on the side of the outer side existing area in the press ditch does not rise very much in the thickness direction, and forms a gentle wall surface. Therefore, the excrement accumulated in the squeeze ditch expands and accumulates on the gentle wall side of the outer existence area side, that is, expands and accumulates on the outside in the width direction in the squeeze ditch. As a result, it is possible to accumulate a large amount of excrement on the outside of the squeeze ditch, compared with the case where it is normally accumulated in the squeeze ditch. Thereby, the surface area in contact with the surface sheet of the absorbent article can be increased, and the area outside the squeeze groove where the excrement is not easily diffused can be effectively used to absorb excrement. Therefore, excrement can be easily absorbed into the first absorption layer in the width direction through the surface sheet. In this way, not only is it easy to diffuse excrement to the second absorption layer in the thickness direction through the squeeze groove, but because it can easily diffuse the excrement to the first absorption layer in the width direction, the absorption speed of the entire absorbent article can be improved, and It can easily maintain the freshness of the surface. [0010] The absorbent article of the present invention may also be the absorbent article described in (1) above, which is (2) the first absorbent layer is provided with liquid permeability including the absorbent polymer contained in the first absorbent layer The sheet, in the non-existent area, the skin-side surface and the non-skin-side surface of the liquid-permeable sheet have joint areas joined to each other, and in a plan view, the joint areas are on both sides of the squeeze groove in the width direction For expansion, in the width direction, the distance between the inner edge of the joining area and the inner edge of the squeeze groove is shorter than the distance between the outer edge of the joining area and the outer edge of the squeeze groove.　　This absorbent article has the above-mentioned structure, so that the absorbent polymer can be held and enclosed in the liquid-permeable sheet 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 suppress clogging of the squeeze groove. Thereby, the excrement is diffused to the second absorption layer in the thickness direction through the squeezing groove, and the excrement is diffused to the first absorption layer in the width direction, so that the absorption speed of the entire absorbent article is increased, and easy maintenance can be achieved more reliably. The effect of the refreshing feeling on the surface. [0011] The absorbent article of the present invention may also be the absorbent article described in (1) or (2) above, which is (3) where the first absorbent layer is located in front and rear of the longitudinal direction of the central existence region The outer side includes a front non-existent area and a rear non-existent area where the absorbent polymer does not exist. The rear squeeze groove squeezes the surface sheet and the first and second absorbing layers, and the front squeeze groove and the rear squeeze groove are located within the front non-existent area and the rear non-existent area, respectively, and the central existing area and The pair of outer existing regions are separated, and in the longitudinal direction, the distance between the end edge of the front squeeze groove and the end edge of the center existing region that are opposed to each other is shorter than the end edge of the front squeeze groove and the front that are opposed to each other The distance between the outer edge of the non-existent area, and the distance between the end edge of the aforementioned rear squeeze groove and the end edge of the aforementioned central existing area, which are opposite to each other, is shorter than the end edge of the aforementioned rear squeeze groove and the aforementioned rear non-existent area. The distance between the outer edge of the area.　　This absorbent article has the above-mentioned structure, and the front and rear squeeze grooves are respectively located in the front and rear non-existing areas, separated from the central existing area and a pair of outer existing areas, and are located in the vicinity of the central existing area in the longitudinal direction. Therefore, among the front and rear non-existent areas divided in the longitudinal direction by the front and rear squeeze grooves, the gap in the area on the side of the central existing area becomes smaller, and the gap in the area on the opposite side becomes larger. As a result, since the voids on the side of the central existence area are small, the excrement excreted in the front and rear squeeze grooves is preferentially absorbed into the absorbent polymer in the central existence area, and a larger amount is absorbed. As a result, the volume of the absorbent polymer swells significantly, and therefore the wall surfaces on the side of the central existing area of the front and rear press grooves rise sharply in the thickness direction, forming a steep wall surface. Therefore, the excrement excreted at the urination point in the substantially central part of the central existence area is easily induced from the central existence area to the front and rear squeezing grooves via the steep wall, and is likely to accumulate in the front and rear squeezing grooves. As a result, the excrement can be easily diffused and absorbed from the bottom of the front and rear squeeze grooves to the second absorption layer on the non-skin side. On the other hand, in the area on the opposite side to the central existing area sandwiching the front and rear press grooves, the wall surfaces of the front and rear press grooves do not rise much in the thickness direction and form a gentle wall surface. Therefore, the excrement accumulated in the front and rear squeeze grooves expands and accumulates on the side of the gentle wall. As a result, it is possible to accumulate a large amount of excrement on the outer side of the front and rear squeeze ditch compared to the case where it is usually accumulated in the squeeze ditch. As a result, the surface area in contact with the surface sheet of the absorbent article can be increased, and the areas outside the front and rear squeezing grooves where excrement is not easily spread can be effectively used for the absorption of excrement. Therefore, excrement can be easily absorbed into the first absorption layer in the longitudinal direction through the surface sheet. Not only this makes it easy for excrement to diffuse to the second absorbent layer through the front and rear squeezing grooves in the thickness direction, but also makes it easy for excrement to diffuse into the first absorbent layer in the longitudinal direction, so the absorption of the entire absorbent article can be improved. Speed, and can easily maintain the freshness of the surface. [0012] The absorbent article of the present invention may also be the absorbent article described in (3) above, which is (4) The first absorbent layer is provided with liquid permeability including the absorbent polymer contained in the first absorbent layer The sheet, in the aforementioned front non-existent area and the aforementioned rear non-existent area, respectively has a front joint area and a rear joint area where the skin-side surface and the non-skin-side surface of the liquid-permeable sheet are joined to each other, in a plan view, the front The joining area and the rear joining area are expanded on both sides of the front pressing groove and the rear pressing groove in the longitudinal direction, and in the longitudinal direction, the inner edge of the front joining area and the inner end of the front pressing groove The distance between the edges is shorter than the distance between the outer edge of the front joint area and the outer edge of the front squeeze groove, and the distance between the inner edge of the rear joint area and the inner edge of the rear squeeze groove , Is shorter than the distance between the outer edge of the rear joining area and the outer edge of the rear pressing groove.　　This absorbent article has the above-mentioned structure, and can hold and confine the absorbent polymer in the liquid-permeable sheet in the longitudinal direction. When the absorbent polymer absorbs excrement and swells, the liquid-permeable sheet can suppress the swelling of the absorbent polymer in the longitudinal direction and suppress the clogging of the front and rear squeeze grooves. Thereby, excrement is diffused to the second absorption layer through the front and rear squeezing grooves in the thickness direction, and the excrement is diffused to the first absorption layer in the width direction, so that the absorption speed of the entire absorbent article is improved, which can be easily and more reliably. To achieve the effect of maintaining the freshness of the surface. [0013] The absorbent article of the present invention may also be the absorbent article described in (4) above, which is (5) in the longitudinal direction, the inner edge of the front joining region and the edge facing the edge The distance between the end edge of the central existing area is shorter than the distance between the inner end edge of the front joint area and the inner end edge of the front squeeze groove; the inner end edge of the rear joint area is opposite to the end edge The distance between the end edge of the aforementioned central existence area is shorter than the distance between the inner end edge of the rear joining area and the inner end edge of the rear squeeze groove. Since this absorbent article has the above-mentioned structure, in the first absorbent layer, the distance between the inner edge of the front joining area and the end edge of the central existing area is short, so the length direction of the absorbent polymer in the central existing area can be reduced. Swollen area. As a result, the absorbent polymer can be swollen more upward in the thickness direction, and the wall surface of the front squeeze groove on the side of the central area can be made steeper. Therefore, in the area outside the front squeeze groove, the excrement can be diffused above the second absorption layer on the outer side in the longitudinal direction, and the excrement can be absorbed into the second absorption layer on the outer side in the longitudinal direction L. Thereby, the absorption speed of the entire absorbent article can be increased, and the effect of easily maintaining the freshness of the surface can be achieved more reliably. [0014] The absorbent article of the present invention may also be the absorbent article described in any one of (1) to (5) above, which is (6) on the surface sheet, and fibers in a region corresponding to the center existing region The density is higher than the fiber density of the region corresponding to each of the aforementioned pair of outer regions. Since the absorbent article has the above-mentioned structure, on the surface sheet, it is easy to introduce excrement preferentially into the area corresponding to the central area with high fiber density, and can be absorbed by the absorbent polymer in the central area. . Therefore, the absorbent polymer in the central existing region can be swelled more preferentially than the absorbent polymer in the outer existing region. Thereby, the wall surface on the side of the central area of the press groove can be sharply erected to easily accumulate in the press groove, and excrement can be easily diffused and absorbed from the bottom of the press groove to the second absorbent layer on the back sheet side. On the other hand, it is possible to prevent excrement from being preferentially introduced into the area corresponding to the outer area where the fiber density is low, and it is possible to prevent the excrement from being absorbed into the absorbent polymer in the outer area so much. Therefore, the swelling of the absorbent polymer in the outer region can be suppressed, and it is more than the absorbent polymer in the central region. Thereby, the wall surface on the side of the outer side of the squeeze groove is gently inclined, and the surface area contacting the surface sheet of the absorbent article is increased, and the excrement can be easily absorbed into the first absorbent layer in the width direction. By these, the absorption speed of the entire absorbent article can be increased, and the effect of easily maintaining the freshness of the surface can be achieved more reliably. [0015] The absorbent article of the present invention may also be the absorbent article described in any one of the above (1) to (6), which is (7) in the thickness direction, and the thickness of the second absorbent layer is a. When the penetration depth of the second absorption layer into the press groove is set to b, the b satisfies (a/2)<b<a.　　This absorbent article has the above-mentioned structure, so that the excrement can be easily introduced from the squeeze groove to the second absorption layer, and the introduced excrement can be easily diffused in the in-plane direction of the second absorption layer. Thereby, the absorption speed of the entire absorbent article can be increased, and the effect of easily maintaining the freshness of the surface can be achieved more reliably. If the value of b is too small, the area of the wall surface (side surface) of the squeeze groove in the second absorption layer becomes small, and it becomes difficult for excrement to diffuse from the wall surface to the second absorption layer. As a result, the amount of excrement introduced into the second absorption layer and the amount of introduced excrement diffused in the in-plane direction of the second absorption layer are reduced. Furthermore, if the value of b is too small, the absorber 4 as a whole becomes low in strength and becomes easy to twist. On the other hand, if the value of b is too large, the press groove 5 will substantially penetrate the second absorption layer. As a result, the excrement cannot diffuse from the bottom of the squeeze groove to the second absorption layer, and the amount of excrement introduced into the second absorption layer may decrease or leak to the outside of the absorbent article. [0016] The absorbent article of the present invention is the absorbent article described in any one of the above (1) to (7), which is (8) in the second absorbent layer, the area corresponding to the central existence area The thickness is thicker than the thickness of the region corresponding to the aforementioned outer existing region.　　 Since this absorbent article has the above-mentioned structure, the height position of the central existing region based on the non-skin side surface of the first absorbent layer becomes higher than the height position of the outer existing region. Thereby, when the excrement is discharged to the squeeze ditch, the effect that the central existing area absorbs a large amount of excrement and the wall surface of the central existing area of the squeeze ditch can be raised (it can be made to rise steeply earlier). In addition, the effect that the outer existence area does not absorb much excrement can be improved, and the effect that the wall surface of the outer existence area side of the squeeze ditch becomes a gentle slope. With these, the excrement can be more easily diffused to the second absorption layer in the thickness direction through the squeeze groove, and the excrement can be more easily diffused to the first absorption layer in the width direction, so the entire absorbent article can be improved. The absorption speed of the product, and it is easier to maintain the freshness of the surface. [0017] The absorbent article of the present invention may also be the absorbent article described in any one of the above (1) to (8), which is (9) the press groove including the deep press section in the thickness direction The high-pressure press portion and the low-pressure press portion are alternately formed side by side with the low-pressure press portion having a shallow depth in the thickness direction.　　This absorbent article has the above-mentioned structure, so that the excrement can be diffused into the deep area of the second absorption layer in the high-pressure part, and the excrement can be diffused into the shallow area of the second absorption layer in the low-pressure part. Since the excrement can be diffused to regions of different depths of the second absorption layer at approximately the same time, it can be efficiently used in the depth direction in the second absorption layer. Thereby, the flow of excrement in the squeeze ditch can be improved, and the absorption speed of excrement that passes through the squeeze ditch can be increased. Therefore, the absorption speed of the entire absorbent article can be improved, and the freshness of the surface can be maintained more easily. [Effects of the invention] 　　[0018] According to the present invention, it is possible to provide an absorbent article comprising an absorbent body and a pair of squeezing grooves, which can suppress clogging of the squeeze grooves and increase the absorption speed, and the absorbent body includes an absorbent polymer The first absorbing layer and the second absorbing layer, the pair of press grooves press the surface sheet, the first absorbing layer and the second absorbing layer.

Hereinafter, the absorbent article of the embodiment will be described with a light incontinence pad as an example. In this case, the absorbing object of the absorbent article, that is, the excrement is urine. The type and use of absorbent articles are not particularly limited, and other absorbent articles may be used as long as they do not exceed the scope of the present invention. Examples of the absorbent article include sanitary pads, sanitary napkins, and disposable diapers.

Figure 1~Figure 2 are the embodiment of absorbent article 1 (light incontinence care FIG. 1 is a schematic plan view of the absorbent article 1 in an unfolded state, and FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1. The absorbent article 1 has a longitudinal direction L, a width direction W, and a thickness direction T orthogonal to each other, and has a longitudinal centerline CL extending in the longitudinal direction L through the center of the width direction W, and a longitudinal centerline CL extending through the center of the longitudinal direction L. The width direction center line CW extending in the width direction W. The length direction L, width direction W, and thickness direction T of the absorbent article 1 are consistent with the length direction, width direction, and thickness direction of each material of the absorbent article 1, so the length is used in common for the absorbent article 1 and each material The direction L, the width direction W, and the thickness direction T. Let one direction and the other direction of the longitudinal direction L be the front and the back, respectively. The term "plan view" refers to the absorbent article 1 in the expanded state viewed in the thickness direction T from the upper surface side. The so-called "skin side" and "non-skin side" refer to the side that is relatively close to and away from the wearer's skin in the thickness direction T when the wearer of the absorbent article 1 wears the absorbent article 1, respectively. . The "in-plane direction" refers to a direction parallel to the plane including the width direction W and the length direction L. Let the direction toward the longitudinal centerline CL and the direction away from each other be the inner and outer directions of the width direction W, respectively. The direction toward the center line CW in the width direction and the direction away from each other are the inner and outer directions of the longitudinal direction L, respectively. These definitions are also commonly used in the materials of the absorbent article 1.

As shown in Fig. 1, in a plan view, the absorbent article 1 is a rectangle with long sides extending in the longitudinal direction L and short sides extending in the width direction W, and both ends of the longitudinal direction L have arc-shaped expansions. Out of shape. However, in this embodiment, the shape of the absorbent article 1 is not limited For such a shape, any lengthwise shape (example: rectangle, oval, gourd shape) can be adopted as long as the length dimension of the longitudinal direction L is longer than the width dimension of the width direction W.

As shown in FIG. 2, the absorbent article 1 includes a top sheet 2, a back sheet 3, and an absorber 4 located on the non-skin side of the top sheet 2, that is, between the top sheet 2 and the back sheet 3. The surface sheet 2 is a liquid-permeable sheet located on the skin side of the wearer. The surface sheet 2 includes, for example, a liquid-permeable nonwoven fabric or woven fabric, a synthetic resin film having liquid-permeable holes, such composite sheets, and the like, and any liquid-permeable sheets. The inner sheet 3 is a liquid-impermeable sheet located on the non-skin side of the wearer. As the back sheet 3, for example, a liquid-impermeable non-woven fabric or a synthetic resin film, a composite sheet of a non-woven fabric and a synthetic resin film, an SMS non-woven fabric, etc., may be any liquid-impermeable sheet. The absorber 4 has a layer with 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 edge portion of the non-skin side surface of the top sheet 2 and the peripheral edge 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 is a sheet having liquid absorption and liquid retention properties. The sheet has a substantially rectangular shape in the longitudinal direction L in a plan view, and is located between the surface sheet 2 and the back sheet 3. The first absorbent layer 11 has a structure in which an absorbent material 11b containing absorbent polymers 14, 15 is sandwiched by two liquid-permeable sheets 11a, 11a'. The absorbent polymers 14 and 15 are not particularly limited as long as they are polymers that can absorb and retain water, and examples include starch-based, acrylic, and amide-based particulate or fibrous superabsorbent polymers. (SAP). The absorbent material 11b is not particularly limited as long as it contains the above-mentioned absorbent polymers 14, 15, and in addition to the absorbent polymers 14, 15 may also contain, for example, water-absorbing fibers such as pulp. The content of the water-absorbent fiber is within the range of 0 to 90% of the mass of the absorbent polymer 14,15. In this embodiment, the absorptive material 11b is comprised only with absorptive polymers 14, 15, for example. The liquid-permeable sheets 11a and 11a' are not particularly limited as long as they are liquid-permeable. For example, hydrophilic non-woven fabrics such as hot-air non-woven fabrics, spun-bonded, laminated non-woven fabrics (exemplified by SMS non-woven fabrics), and tissues can be used. From the viewpoint of liquid permeability, the liquid-permeable sheets 11a and 11a' are preferably hot-air nonwoven fabrics. The absorbent polymers 14, 15 are preferably fixed to the liquid-permeable sheets 11a, 11a' with a hot-melt adhesive or the like (not shown), and may be covered with the liquid-permeable sheets 11a, 11a' without being fixed. Examples of the basis weight of the absorbent polymers 14 and 15 include 100 to 400 g/m ² .

The second absorbent layer 12 is a layer having liquid absorbing properties and liquid retention properties. This layer has a substantially rectangular shape in the longitudinal direction L in a plan view, both ends of the longitudinal direction L are arc-shaped, and the central portion of the longitudinal direction L It has a constricted shape in the width direction W and is located between the first absorbent layer 11 and the back sheet 3. The second absorbent layer 12 has a structure in which two liquid-permeable sheets 12a, 12a' sandwich an absorbent core 12b in which an absorbent polymer and a mixture 16 containing a liquid-retaining substance are sandwiched. The absorbent polymer is the same as the absorbent polymers 14 and 15 of the first absorbent layer 11. Examples of the liquid-retaining substance include water-absorbent fibers such as pulp. The content of absorbent polymer is in the range of 0~90% of the mass of the absorbent fiber. Examples of the liquid-permeable sheets 12a and 12a' include the liquid-permeable sheets 11a and 11a' of the first absorbent layer 11. The mixture 16 is preferably fixed to the liquid-permeable sheets 12a, 12a' with an adhesive such as hot melt (not shown), but it may be covered with the liquid-permeable sheets 12a, 12a' without being fixed. The basis weight of the absorbent polymer includes, for example, 0 to 600 g/m ² , and the basis weight of the water-absorbent fiber includes, for example, 100 to 700 g/m ² .

The absorbent article 1 is provided with a pair of press grooves 5, 5 which are extended in the longitudinal direction L, are arranged side by side at a predetermined interval in the width direction W, and press the surface sheet 2 and the first absorbent layer 11 And the second absorption layer 12. In the longitudinal direction L, a pair of press grooves 5 and 5 are extended to the sides of both ends of the second absorbent layer 12. In the thickness direction T, the squeeze groove 5 penetrates the first absorption layer 11 from the surface sheet 2 and extends to the inside of the second absorption layer 12, and is formed by, for example, embossing. In this embodiment, the lower part (non-skin side part) of the bottom of the press groove 5 is pressed to form a high-density part 5t with a higher fiber density than the surrounding area. The inner edge E01 and the outer edge E02 in the width direction W of the press groove 5 are the inner edge and the outer edge in the width direction W of the high-density portion 5t. In addition, the squeeze groove 5 may reach the vicinity of the skin side surface of the back sheet 3 from the surface of the front sheet 2 in the thickness direction T. The width of the pressing groove 5 is preferably 1 to 5 mm, more preferably 2 to 3 mm. In this embodiment, the pattern of the pair of press grooves 5, 5 is formed such that, for example, the distance between the pair of press grooves 5, 5 becomes smaller (narrower) near the center of the longitudinal direction L, and goes toward both outer sides of the longitudinal direction L. It becomes larger (expanded), and becomes smaller (narrower) again as it approaches both ends of the second absorbent layer 12. This pattern allows excrement that moves in the longitudinal direction L through the pair of press grooves 5 and 5 to easily spread in both the width direction W and the longitudinal direction L.

[0027] In the present embodiment, the absorbent article 1 further includes a front side squeeze groove 6 and a rear side squeeze groove 6'that extend in the width direction W and are arranged at a predetermined interval in the longitudinal direction L. In the thickness direction T, the front squeeze groove 6 and the rear squeeze groove 6'are formed by pressing the surface sheet 2 and the first absorbent layer 11 and the second absorbent layer 12 (example: embossing). The first absorption layer 11 is extended to the inside of the second absorption layer 12. In this embodiment, the lower part (non-skin side part) of the bottom of the front press groove 6 and the rear press groove 6'is pressed to form a high-density part 6t having a higher fiber density than the surroundings. The inner end edge and outer end edge of the longitudinal direction L of the front press groove 6 and the rear press groove 6'are the inner end edge and the outer end edge of the longitudinal direction L of the high-density portion 6t. The front pressing groove 6 and the rear pressing groove 6'may reach the vicinity of the skin side surface of the back sheet 3 from the surface of the front sheet 2 in the thickness direction T. The width of the front pressing groove 6 and the rear pressing groove 6'is preferably 1 to 5 mm, more preferably 2 to 3 mm. In this embodiment, the front press groove 6 and the rear press groove 6'are arranged beside the two ends of the pair of press grooves 5, 5 in the longitudinal direction L, and are arranged in the shape of an arc that protrudes to the outside. 5,5 rooms. [0028] In the present embodiment, the area surrounded by the pair of press grooves 5, 5, the front press groove 6 and the rear press groove 6'is drawn from the surrounding area by the pressing process (embossing process) when each press groove is formed. Surface sheet 2 makes the thickness thinner. Therefore, in the area surrounded by the press groove, the fiber density of the surface sheet 2 becomes higher than the outer area of the press groove. Therefore, the surface sheet 2 in the area surrounded by the squeeze groove is highly absorbent, and it is easy to introduce excrement into the first absorption layer 11. [0029] As shown in FIG. 2, in this embodiment, the absorbent article 1 further includes a pair of lateral gather sheets 7, 7, linear elastic members 8, 8, an exterior sheet 9, and a fixing portion 10,... , 10. The pair of side corrugated sheets 7 and 7 are leak-proof walls extending in the longitudinal direction L, and the leak-proof walls are arranged so as to cover the surfaces on both sides of the surface sheet 2 in the width direction W. The pair of side corrugated sheets 7 and 7 are folded to be able to stand upright on both sides of the surface sheet 2 in the width direction W, and the inner edges in the width direction W are provided as free ends to form a corrugated portion. The linear elastic members 8 and 8 are linear elastic bodies extending along the longitudinal direction L beside the free ends of the pair of lateral corrugated sheets 7 and 7. The linear elastic members 8 and 8 are arranged, for example, one for each of the pair of side gather sheets 7, 7 to shrink the edges of the pair of side gather sheets 7, 7. The exterior sheet 9 is joined to the surface of the back sheet 3 on the non-skin surface side, and is joined to a pair of lateral gather sheets 7 and 7 at the peripheral edge portion thereof. The fixing parts 10,..., 10 are elongated rectangular adhesive tapes, and are bonded along the longitudinal direction L on the side opposite to the back sheet 3 of the exterior sheet 9. In the present embodiment, six fixing portions 10, ..., 10 arranged side by side in the width direction W are provided. The fixing parts 10,..., 10 fix the absorbent article 1 to the packaging sheet (not shown) through the separator when the absorbent article 1 is individually packaged, and then fix the absorbent article 1 to the wearer when the absorbent article 1 is in use Underwear and so on.　　[0030] Next, the first absorbing layer 11 will be further described with reference to FIGS. 2 and 3 to 6. 3 is a plan view of the first absorbent layer 11, FIG. 4 is a cross-sectional view of the first absorbent layer 11 in FIG. 3 IV-IV, FIG. 5 is a VV cross-sectional view of the first absorbent layer 11 in FIG. 1 A schematic plan view of the existing area and the non-existing area of the absorbing layer 11. In addition, in Figs. 3 to 5, at least one of the squeeze groove 5, the front squeeze groove 6 and the rear squeeze groove 6'is described hypothetically. [0031] As shown in FIGS. 3 to 5, in the first absorbent layer 11, the space formed between the liquid-permeable sheet 11a on the skin side and the liquid-permeable sheet 11a' on the non-skin side is joined by several The area is divided into a plurality of areas in a plan view. A part of the liquid-permeable sheet 11a and a part of the liquid-permeable sheet 11a' facing the liquid-permeable sheet 11a are pressed in the thickness direction T (example: embossing) or pressed by an adhesive (example: hot melt adhesive) to form a joint area. [0032] In this embodiment, the first absorbent layer 11 is divided into three regions in the width direction W by a pair of bonding regions 11t1 and 11t1, and the three regions are divided by a front bonding region 11t2 and a rear bonding region 11t2. 'Seal the front and back of the longitudinal direction L. The three areas refer to the 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 band-shaped regions that extend in the longitudinal direction L and are arranged at predetermined intervals on both sides of the width direction W sandwiching the longitudinal centerline CL. The pattern of the pair of joining regions 11t1 and 11t1 is formed such that, for example, the interval between the two is narrow near the center of the longitudinal direction L, and expands toward the outer sides of the longitudinal direction L, and is formed along a pair of presses. The pattern of groove 5. The front joining area 11t2 and the rear joining area 11t2' are strip-shaped areas that extend in the width direction W and are arranged at predetermined intervals on both sides of the longitudinal direction L with the width direction center line CW interposed therebetween.　　[0033] Therefore, in the present embodiment, the central arrangement area 11s1 is formed by the liquid-permeable sheets 11a, 11a', the pair of bonding regions 11t1, 11t1, the front bonding region 11t2 and the rear bonding region 11t2'. The central arrangement area 11s1 has a substantially hourglass-shaped shape that is long in the longitudinal direction L. As shown in FIG. The liquid-permeable sheets 11a, 11a', each joining area 11t1, and the front joining area 11t2 and the rear joining area 11t2' form each outer arrangement area 11s2. Each outer arrangement area 11s2 has an inner side having a convex curve with respect to the longitudinal center line CL, and has a substantially rectangular shape that is long in the longitudinal direction L. As shown in FIG. In the present embodiment, the joining area 11t1 is a high-density portion having a higher fiber density than the surrounding area by squeezing. Therefore, the inner edge E21 and the outer edge E22 in the width direction W of the joining region 11t1 are the inner edge and the outer edge of the high-density portion in the width direction W. Similarly, the front joining area 11t2 and the rear joining area 11t2' are high-density portions having a higher fiber density than the surrounding area by squeezing. Therefore, the inner edge and the outer edge of the longitudinal direction L of the front joining region 11t2 and the rear joining region 11t2' are the inner and outer edges of the high-density portion in the longitudinal direction. In addition, the shapes of the pair of joining areas 11t1, 11t1, the front joining area 11t2 and the rear joining area 11t2', that is, the shapes of the central arrangement area 11s1 and the pair of outer arrangement areas 11s2, 11s2 are arbitrary shapes.　　[0034] The central arrangement region 11s1 is a region including the absorbent polymer 14 and the absorbent polymer 14, that is, around the central existing region 21, and has a gap G11 in which the absorbent polymer 14 does not exist. The outer arrangement region 11s2 is a region including the absorbent polymer 15 and the absorbent polymer 15 existing, that is, except for the periphery of the outer side existing region 22 in the width direction W, it has a gap G12 in which the absorbent polymer 15 does not exist. In this embodiment, each of the voids is formed in a strip shape having a substantially constant width in the in-plane direction. 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 area cannot be ignored, and if the width is too large, the absorbent polymer cannot be fully loaded.　　[0035] The boundary between the gap G11 and the central existing region 21, and the boundary between the gap G12 and the outer existing region 22 are set based on the amount of absorbent polymer. That is, if the highest value of the basis weight of the absorbent polymers 14, 15 is set to Mx, the basis weight of the absorbent polymers 14, 15 is 1/n (However, n is a positive real number, exemplified: n= The part of 3) is set as the boundary. For example, if the highest value of the basis weight of the absorbent polymer 14 is set to Mx21, the boundary between the gap G11 and the central existence region 21 is at the periphery of the central existence region 21, and the basis weight of the absorbent polymer 14 is Mx21/ The part of n is set as the boundary. The boundary is the end edge of the central existence region 21 and the end edge of the gap G11. Similarly, if the highest value of the basis weight of the absorbent polymer 15 is set to Mx22, the gap G12 and the outer existence area 22 are outside the periphery of the outer existence area 22, and the basis weight of the absorbent polymer 15 is Mx22/n The position of is set as the junction. The boundary is the end edge of the outer existing region 22 and also the end edge of the gap G12.　　[0036] The first absorption layer 11 includes a central arrangement area 11s1 including a central existence area 21 and a gap G11, and a pair of outer arrangement areas 11s2 and 11s2 including an outer existence area 22 and a gap G12. Here, if the method of observing the first absorbent layer 11 is changed, the first absorbent layer 11 will include the area PEA where the absorbent polymer exists and the non-existence area NPA where the absorbent polymer does not exist. In this embodiment, as shown in FIG. 6, the first absorbent layer 11 includes a pair of outer existing regions 22, 22, and includes a central existing region 21 including an absorbent polymer 14 as the existing region PEA, and an absorbent polymer 15; and a pair of non-existent areas 31, 31, a front non-existent area 32, and a rear non-existent area 32' that do not include an absorbent polymer as the non-existent area NPA. One and the other of the pair of non-existent areas 31 and 31 are located between the central existence area 21 and one and the other of the pair of outer existence areas 22 and 22, respectively. The front non-existent area 32 and the rear non-existent area 32' are located in the outer areas of the front and rear of the central existing area 21 in the longitudinal direction L, respectively. There is no absorbent polymer in the pair of non-existent areas 31, 31, the front non-existent area 32 and the rear non-existent area 32'. However, the so-called "non-existence" and "non-existence" of absorbent polymer are not just the absence of absorbent polymer at all, but the difference between the absorbent polymer in the area where the absorbent polymer "exists" The maximum basis weight may include the absorbent polymer having a basis weight of about 0 to 5% (the same throughout this specification). [0037] In the first absorbent layer 11, as an example of the size of the central existing region 21, the size of the first absorbent layer 11 in the width direction W is approximately three equal parts in the width direction W, in the longitudinal direction. L is the size of six parts in the center when the first absorbing layer 11 is divided into approximately eight equal parts in the longitudinal direction L. In the central area 21, the absorbent polymer 14 preferably has a substantially uniform basis weight distribution. The central existence area 21 has, for example, a substantially similar shape that is only a small gap G11 smaller than the central arrangement area 11s1. As an example of the size of each outer existence area 22, in the width direction W, the first absorbent layer 11 is roughly divided into three equal parts in the width direction W. In the longitudinal direction L, it is in the longitudinal direction. When the first absorbent layer 11 is roughly divided into eight equal parts, the size of the center is six parts. There are regions 22 on each outer side, and it is preferable that the respective absorbent polymers 15 have a substantially constant basis weight distribution. Each outer-existing area has, for example, a substantially similar shape which is only one circle smaller than each outer-arrangement area 11s2 by a gap G12. In the width direction W, the ratio of the width of the central existence area 21 to the width of each outer existence area 22 is 1.2-2:1. Here, the boundary between the central existing region 21 and the non-existent region 31 is the same as the boundary between the region where the absorbent polymer 14 exists and the gap G11. The boundary is the end edge E11 of the central existence area 21 and the end edge of the non-existence area 31. In addition, the boundary between the outer region 22 and the non-existent region 31 is the same as the boundary between the region where the absorbent polymer 15 exists and the gap G12. The boundary is the end edge E12 of the outer existence area 22 and the end edge of the non-existence area 31.　　[0038] The gaps G01 and G02 are spaces surrounded by the liquid-permeable sheets 11a, 11a' of the first absorbent layer 11 and the inner and outer wall surfaces (surface sheet 2) of the press groove 5. The gaps G04 and G05 are spaces surrounded by the liquid-permeable sheet 11a (including the joining area 11t1) of the first absorbent layer 11 and the inner and outer wall surfaces (surface sheet 2) of the press groove 6 (or 6'). The gap G03 is a space surrounded by the surface sheet 2 and the bonding area 11t1.　　[0039] Next, the second absorbing layer 12 will be further described with reference to FIGS. 2 and 7 to 8. However, FIG. 7 is a plan view of the second absorption layer 12, and FIG. 8 is a VIII-VIII cross-sectional view of the second absorption layer 12 in FIG. In addition, in Fig. 7, the positions of the press groove 5, the front press groove 6 and the rear press groove 6'in a plan view are described hypothetically. [0040] As shown in FIGS. 7 to 8, in the second absorbent layer 12, the space formed between the liquid-permeable sheet 12a on the skin side and the liquid-permeable sheet 12a' on the non-skin side is formed by absorbent polymer The mixture 16 of the substance and the liquid-retentive substance is filled. The second absorbent layer 12 has a thick fleshy region 12T, which is a substantially rectangular shape having arc corners in the center of the width direction W and the longitudinal direction L; and the middle fleshy region 12S, which is a substantially annular shape surrounding the thick fleshy region 12T; and The thin meat region 12R is a substantially annular shape surrounding the middle meat region 12S and has the outer shape of the second absorbent layer 12. The thickness in the thickness direction T of the thick meat area 12T is the thickest, the thickness in the thickness direction T of the thin meat area 12R is the thinnest, and the thickness in the thickness direction T of the middle meat area 12S is gradually thicker from the thin meat area 12R toward the thick meat area 12T . Therefore, the second absorption layer 12 has a medium-high (example: the volume of the center portion is high). In the present embodiment, in the width direction W, in a plan view, the thick fleshy area 12T is an area corresponding to the central existing area 21, the thin fleshy area 12R is an area corresponding to the outer existing area 22, and the middle fleshy area 12S is a non-existent area. The area corresponding to area 31.　　[0041] In the width direction W, one and the other of the pair of press grooves 5 are located within one and the other of the pair of non-existent regions 31, respectively, and are separated from the central existing region 21 and the pair of outer existing regions 22. Therefore, in the width direction W, the inner edge E01 and the outer edge E02 of the press groove 5 exist between the edge E11 of the central existence region 21 and the edge E12 of the outer existence region 22. Preferably, in the width direction W, one and the other of the pair of press grooves 5 are located within the pair of joining regions 11t1 and 11t1, respectively. Therefore, it is preferable that, in the width direction W, the inner edge E01 and the outer edge E02 of the press groove 5 exist between the inner edge E21 and the outer edge E22 of the joining region 11t1.　　[0042] In the present embodiment, as shown in FIGS. 2 to 4, the press groove 5 is located in the central existing area 21 close to the non-existing area 31, and away from the outer existing area 22. In the width direction W, the distance d11 between the end edge E01 of the pressing groove 5 facing each other and the end edge E11 of the central existing area 21 is shorter than the end edge E02 of the pressing groove 5 and the end edge E12 of the outer existing area 22 facing each other. The distance d12 (d11<d12). The distance in the width direction W is measured on the center line CW in the width direction, for example. If the squeeze groove 5 is located close to the central existence area 21 and away from the outer existence area 22, the absorbent polymer 14 of the central existence area 21 is preferably able to absorb the squeeze groove preferentially than the absorbent polymer 15 of the outer existence area 22 The excrement within 5. The details are described below.　　[0043] FIG. 9 is a cross-sectional view illustrating the function of the absorbent article 1. In this figure, the area near the press groove 5 including the first absorbent layer 11 is shown. Fig. 9(a) shows the state before the excrement S0 is excreted, and Fig. 9(b) shows the state when the excrement S0 is excreted. However, here, the thickness in the thickness direction T of the second absorption layer 12 is made constant. [0044] As shown in FIG. 9(a), in the absorbent article 1, the squeezing groove 5 is located in the non-existing area 31, separated from the central existing area 21 and the outer existing area 22, and is located more outside in the width direction W The area 22 is closer to the vicinity of the central existing area 21 (d11<d12). Therefore, among the non-existent regions 31 divided in the width direction W by the press groove 5, the gap (G01+G11) of the region on the side of the central existing region 21 that does not have absorbent polymer becomes smaller, and the outer region 22 exists. The gap (G02+G12) in the area on the side where the absorbent polymer does not exist becomes larger. At this time, the thickness T01 of the central existing region 21 and the thickness T02 of the outer existing region 22 of the first absorbent layer 11 are substantially the same. In this way, because the gap (G01+G11) on the side of the central existence area 21 is small, as shown in Fig. 9(b), among the excrement S0, the excrement S1 discharged to the squeeze groove 5 is easily absorbed into the central existence area 21. Polymer 14. Therefore, the excrement S2 penetrates the small gap (G01+G11) and is preferentially absorbed into the absorbent polymer 14 in the central existence region 21, and thus a large amount is absorbed into the absorbent polymer 14 in the central existence region 21. As a result, the volume of the absorbent polymer 14 in the central existing region 21 expands significantly. Thereby, the wall surface 5W1 on the side of the central existence region 21 of the press groove 5 rises sharply in the thickness direction T, forming a steep wall surface 5W1. At this time, the thickness T11 of the central existing region 21 of the first absorbing layer 11 becomes larger than the thickness T12 of the outer existing region 22 (T11>T12). Therefore, the excrement S0 excreted at the urination point in the substantially central portion of the central existence area 21 is easily induced from the central existence area 21 into the squeeze groove 5 via the steep wall 5W1, and is easily accumulated in the squeeze groove 5 ( S1). As a result, the excrement S4 can be easily diffused and absorbed from the bottom of the squeeze groove 5 (high-density part 5t) to the second absorption layer 12 on the non-skin side.

On the other hand, the excrement S1 discharged into the squeeze groove 5 penetrates the large gap (G02+G12), and therefore becomes less likely to be absorbed by the absorbent polymer 15 in the outer region 22. At this time, since the absorbent polymer 15 in the outer region 22 does not absorb excrement S1 so much, its volume does not expand so much. Therefore, the wall surface 5W 2 on the side of the outer region 22 in the press groove 5 does not stand up so much in the thickness direction T, and a gentle wall surface 5W 2 is formed. Therefore, the excrement S1 accumulated in the squeeze ditch 5 expands and accumulates on the side of the gentle wall 5W 2 on the outer existence region 22 side, that is, expands and accumulates outside the width direction W in the squeeze groove 5. As a result, it is possible to accumulate a large amount of excrement S1 on the outside of the squeeze groove 5 compared to the case of accumulation in a normal squeeze groove. Thereby, the surface area in contact with the surface sheet 2 of the absorbent article 1 can be increased, and the outer area of the squeeze groove 5 where the excrement S1 is not easily diffused can be effectively used to absorb Fecal matter S3. Therefore, the excrement S3 can be easily absorbed into the first absorption layer 11 in the width direction W through the surface sheet 2.

In this way, not only the excrement S4 can be easily diffused to the second absorption layer 12 in the thickness direction T through the squeeze groove 5, but also the excrement S3 can be easily diffused to the first absorption layer 11 in the width direction W, thereby improving the absorbency. The absorption speed of the entire article 1 (for example, more than twice that of the current product), and the freshness of the surface of the surface sheet 2 can be easily maintained.

As the distance d11, 1 mm to 10 mm is preferable, and 1.5 mm to 3 mm is more preferable. The distance d11 of 1 mm or more is to prevent the squeeze groove 5 from being clogged when the absorbent polymer 14 in the central existing region 21 absorbs excrement and expands. The distance d11 is 10 mm or less in order to absorb excrement into the absorbent polymer 14 in the central existing region 21 more preferentially than the absorbent polymer 15 in the outer existing region 22, so that the side wall on the side of the central existing region 21 is erected more steeply. The reason is that (if the distance is too large, the side wall on the side of the central existing area 21 is not easy to rise steeply). On the other hand, as the distance d12, under the condition of d12>d11, 2mm~15mm is preferred, and 2mm~5mm is more preferred. The distance d12 is 2 mm or more because the excrement is absorbed into the absorbent polymer 14 in the central area 21 more preferentially than the absorbent polymer 15 in the outer area 22, and the absorbent polymer 15 in the outer area 22 absorbs excretion. It expands to prevent the squeeze ditch 5 from being blocked. The reason why the distance d12 is 15 mm or less is to allow the absorbent polymer 15 in the area 22 on the outside to reliably absorb excrement. In this embodiment, for example, the distance d11 is set to 1.5 mm, and the distance d12 is set to 2.5 mm.

As a preferred form of this embodiment, in a plan view, the joint area 11t1 expands on both sides of the width direction W of the press groove 5, and the press groove 5 is located near the central existence area 21 of the joint area 11t1, and is far from the outer existence area 22 Location. That is, in the width direction W, the distance d21 between the inner edge E21 of the joining area 11t1 and the inner edge E01 of the press groove 5 is shorter than the outer edge E22 of the joining area 11t1 and the outer end of the press groove 5 The distance d22 of the edge E02 (d21<d22). The absorbent article 1 having the above-mentioned configuration can hold and confine the absorbent polymers 14, 15 in the width direction W in the liquid-permeable sheets 11a, 11a'. Furthermore, when the absorbent polymers 14, 15 absorb excrement and swell, the liquid-permeable sheets 11a, 11a' suppress swelling in the width direction W of the absorbent polymers 14, 15 and can suppress the clogging of the squeeze groove 5.　　[0047] In the present embodiment, the front 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. Furthermore, in the longitudinal direction L, the inner edge E03 and the outer edge E04 of the front press groove 6 are the end edge E31 existing in the central existence region 21 and the end edge in the longitudinal direction L of the first absorbent layer 11 (front Between the outer edges E42) of the non-existing region 32. Furthermore, as a preferred form of the present embodiment, the front press groove 6 is located in the front non-existing area 32 near the center existing area 21. That is, in the longitudinal direction L, the distance d31 between the end edge E03 of the front press groove 6 and the end edge E31 of the central existence region 21 that are opposite to each other is shorter than the end edge E04 of the front press groove 6 and the front non-existence. The distance d32 of the outer edge E42 of the area 32 (d31<d32). These edges and the like are measured on the longitudinal center line CL with respect to the longitudinal direction L. In addition, the rear squeeze groove 6'and the rear non-existent area 32' also have the same structure as the front squeeze groove 6 and the front non-existent area 32. "In the absorbent article 1 having the above-mentioned configuration, the front pressing groove 6 is located in the front non-existing area 32, separated from the central existing area 21 and the outer existing area 22, and is located in the vicinity of the central existing area 21 in the longitudinal direction L. Therefore, in the front non-existent area 32 divided in the longitudinal direction L by the front press groove 6, the gap (G11+G04) in the area on the side of the central existing area 21 becomes smaller, and the gap (G05+(G05+G04) in the area on the opposite side becomes smaller The gap G05 between the surface sheet 2 and the second absorbent layer 12 on the outer side of the longitudinal direction L becomes larger. As a result, since the gap on the side of the central existing region 21 is small, it is discharged to the front squeeze groove 6 for discharge The substance is preferentially absorbed to the absorbent polymer 14 in the central existence area 21. Therefore, the absorbent polymer 14 in the central existence area 21 swells significantly, and the wall surface on the side of the central existence area 21 rises sharply in the thickness direction T, A steep wall surface is formed. By this, the excrement of the urination point excreted at the approximate center of the central existence area 21 is guided to the front pressing groove 6 through the steep wall surface, and the groove 6 can be easily pressed from the front. The bottom of the squeezing groove is diffused and absorbed to the second absorbent layer 12 on the non-skin side. On the other hand, in the area opposite to the central existing area 21 across the front squeezing groove 6, the wall surface of the front squeezing groove 6 is not very vertical in the thickness direction T As a result, the excrement accumulated in the front squeeze groove 6 expands and accumulates on the side of the gentle wall, which can increase the surface area contacting the surface sheet 2 of the absorbent article 1, and can The outer area of the front squeeze groove 6 where the excrement is not easily diffused is effectively used for the absorption of excrement. Therefore, excrement can be easily absorbed through the surface sheet 2 to the first absorption layer 11 in the longitudinal direction L. In this way, not only The excrement can be easily diffused to the second absorption layer 12 in the thickness direction T through the front squeeze groove 6, and the excrement can be easily diffused to the first absorption layer 11 in the length direction L, and the absorption speed of the entire absorbent article 1 can be improved , And can easily maintain the freshness of the surface. In addition, the situation of the rear squeeze groove 6'and the rear non-existent area 32' also achieves the same effect as the case of the front squeeze groove 6 and the front non-existent area 32. 　　[0048 ] As a preferred form of this embodiment, in a plan view, the front joint area 11t2 is expanded on both sides of the front press groove 6 in the longitudinal direction L. Furthermore, the front press groove 6 is located near the center existing area 21 of the front joint area 11t2 That is, in the longitudinal direction L, the distance d41 between the inner edge E41 of the front joining area 11t2 and the inner edge E03 of the front press groove 6 is shorter than the outer edge E42 and the front press of the front joining area 11t2 The distance d42 (d41<d42) of the outer edge E04 of the groove 6. The absorbent article 1 having the above-mentioned structure can hold and seal the absorbent polymer 14 in the longitudinal direction L in the liquid-permeable sheets 11a, 11a' When the absorbent polymer 14 absorbs excrement and swells, the liquid-permeable sheets 11a, 11a' suppress the swelling of the absorbent polymer 14 in the longitudinal direction L, and can suppress the clogging of the front squeeze groove 6. Therefore, absorption can be suppressed Sex polymer 14 towards the front joining area 11 The invasion of t2. In addition, the case of the rear press groove 6'and the rear joint area 11t2' also has the same structure as the case of the front press groove 6 and the front joint area 11t2, and achieves the same effect. [0049] As a preferred form of this embodiment, in the longitudinal direction L, the distance between the inner edge E41 of the front joining area 11t2 and the end edge E31 of the central existence area 21 facing the end edge E41 (d31-d41 ) Is shorter than 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. In the absorbent article 1 having the above-mentioned configuration, the first absorbent layer 11 has a short distance between the inner edge E41 of the front joining area 11t2 and the end edge E31 of the central existence area 21, so that the central existence area 21 can be The area where the absorbent polymer 14 swells in the longitudinal direction L is small. As a result, the absorbent polymer 14 can be swollen more upward in the thickness direction T, and the wall surface on the side of the central existing region 21 of the front press groove 6 can be made steeper. In addition, the case of the rear press groove 6'and the rear joint area 11t2' also has the same structure as the case of the front press groove 6 and the front joint area 11t2, and achieves the same effect. [0050] As a preferred form of this embodiment, when the thickness of the second absorbent layer 12 in the thickness direction T is set to a, and the penetration depth of the press groove 52 into the absorbent layer 12 is set to b, b satisfies (a /2)<b<a. Fig. 10 is a cross-sectional view illustrating the relationship between the depth of the press groove and the thickness of the second absorbent layer. In addition, the thickness a of the second absorbent layer 12 and the penetration depth b of the squeeze groove 5 into the second absorbing layer 12 are measured at the center of the width direction W of the high-density portion 5t (bottom) of the squeeze groove 5 in a plan view. In this embodiment, the measurement is performed on the center line CW in the width direction. As shown in FIG. 10, the absorbent article 1 having the above-mentioned structure can easily lead the excrement S from the press groove 5 to the second absorption layer 12, and can easily cause the introduced excrement S to face the surface of the second absorption layer 12. The direction spreads, not only the non-skin side of the second absorbent layer 12. Thereby, the absorbent article 1 as a whole can increase the absorption speed, and can more reliably achieve the effect of easily maintaining the freshness 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 press groove 5 in the second absorbent layer 12 becomes small, and the excrement becomes difficult to diffuse from the wall surface to the first 2 absorbing layer 12. As a result, the amount of excrement introduced into the second absorption layer and the amount of introduced excrement diffused in the in-plane direction of the second absorption layer are reduced. Furthermore, if the value of b is too small, the absorber 4 as a whole becomes low in strength and tends to be twisted. On the other hand, if the value of b is too large (a≦b), the press groove 5 substantially penetrates the second absorption layer. As a result, the excrement may not diffuse from the bottom of the press groove 5 (high-density part 5t) to the second absorbent layer 12, or may leak to the outside of the absorbent article.

As a preferred form of the present embodiment, in a plan view in the width direction W, the second absorbent layer 12 is roughly such that the thick fleshy region 12T corresponds to the central existing region 21, and the thin fleshy region 12R corresponds to the outer existing region 22 The middle meat area 12S is an area corresponding to the non-existing area 31. Therefore, the second absorption layer 12 has a mid-to-high structure (example: high bulk density at the center). In the absorbent article 1 having the above-mentioned configuration, the height position of the central existing region 21 (example: the bottom surface of the central existing region 21) based on the non-skin side surface of the first absorbent layer 11 is higher than the outer existing region 22 The height position (example: the bottom surface of the area 22 outside). Thereby, when the excrement is discharged to the squeeze ditch 5, the central existence area 21 absorbs a large amount of excrement, which can further enhance the effect of the wall surface on the side of the central existence area 21 of the squeeze groove 5 (which can make it steeper earlier and preferentially Erect). In addition, the outside existence area 22 does not absorb excrement so much, and the effect that the wall surface on the outside existence area 22 side of the press ditch 5 becomes gently inclined.

As a preferred form of this embodiment, in the area surrounded by the pair of press grooves 5, 5, the front press groove 6 and the rear press groove 6', the fiber density of the surface sheet 2 is higher than that of the surrounding area. . Therefore, in the surface sheet 2, the fibers in the area corresponding to the central existing area 21 are dense The degree is higher than the fiber density of the region corresponding to each of the pair of outer regions 22. In the absorbent article 1 having the above-mentioned configuration, in the surface sheet 2, it is easy to preferentially introduce excrement into the region corresponding to the central existence region 21 with high fiber density. Thereby, the absorbent polymer 14 in the central region 21 can be expanded preferentially than the absorbent polymer 15 in the outer region 22, and the wall surface on the side of the central region 21 of the press groove 5 can be raised sharply . On the other hand, it is possible to prevent excrement from being preferentially introduced into the area corresponding to the outer existence area 22 with low fiber density. As a result, compared with the absorbent polymer 14 in the central region 21, the expansion of the absorbent polymer 15 in the outer region 22 can be suppressed, and the wall surface on the outer region 22 side of the press groove 5 can be formed smoothly. tilt.

[0058] 第1次生理食鹽水Q滴下時(相當於第1次排尿時)，第1吸收層11的吸收性聚合物膨脹。其結果，在實施例1、2的試料，第1吸收層11的中央存在區域21大幅地膨脹，外側存在區域22不怎麼膨脹。因此，壓榨溝5的中央存在區域21側的壁面對於裏面薄片3形成的角，和壓榨溝5的外側存在區域22側的壁面對於裏面薄片3形成的角，為不同。亦即，中央存在區域21側的壁面形成的角變大，外側存在區域22側的壁面形成的角不怎麼變大。另一方面，在比較例1、2的試料，中央存在區域側的壁面形成的角和外側存在區域側的壁面形成的角，為大致相同。因此，在實施例1、2的試料，相較於各比較例1、2的試料，被滴下的生理食鹽水Q容易迅速地流到壓榨溝5，如表1所示在第1次滴下時，吸收時所需的時間短(吸收速度快)。特別是吸收容量大的實施例1的試料，相較於比較例1的試料，於站著、中腰的條件下吸收速度提升到1.5倍以上，於坐著的條件下提升到2倍以上。進一步，第2次生理食鹽水Q滴下時(相當於2次的排尿時)，第1吸收層11的吸收性聚合物進一步膨脹，開始凝膠阻隔(gel blocking)。因此，實施例1、2的試料係中央存在區域21側的壁面形成的角變成更大，與外側存在區域22側的壁面形成的角更大為不同。另一方面，比較例1、2的試料，係中央存在區域側的壁面形成的角和外側存在區域側的壁面形成的角的不同，分別較實施例1、2的試料小。因此，實施例1、2的試料，分別相較於例1、2的試料，在站著、中腰的條件及坐著的條件的任一情形下，皆為吸收速度提升2倍以上。如此地，無論 相當於第2吸收層12的吸收層是否包含吸收性聚合物，實施例的試料相較於比較例(現行品)的試料，明顯地大幅改善吸收速度，特別是了解第2次排尿時具有2倍以上的吸收速度。亦即，了解本吸收性物品1相較於現行品，在第2次排尿時具有2倍以上的吸收速度。因而了解藉由這種高吸收速度，實施例的試料容易維持表面的清爽感。 As a preferred form of this embodiment, the squeeze groove 5 includes a high-pressure press section 41 with a deep depth in the thickness direction T and a low-pressure press section 42 with a shallow depth in the thickness direction T. The high-pressure press section 41 and the aforementioned low-pressure press section 42 are alternately arranged. The ground is formed side by side. Fig. 11 is a plan view schematically showing the structure of the press groove 5 (the front press groove 6 and the rear press groove 6'). In the absorbent article 1 having the above-mentioned structure, the excrement can be diffused to the deep region in the thickness direction T of the second absorption layer 12 by the high-pressure squeezing portion 41, and the excrement can be diffused to the second absorption by the low-pressure portion 42 A shallow area in the thickness direction T of the layer 12. That is, since the 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 excrement in the squeeze groove 5 (the front squeeze groove 6, the rear squeeze groove 6') can flow well, that is, it can be lifted through the squeeze groove 5 (, the front squeeze groove 6, the rear squeeze groove 6') Absorption rate of excrement. Therefore, the absorption speed of the entire absorbent article can be improved, and the freshness of the surface can be maintained more easily. [0054] <The distance between the end edges> The distance between each end edge was measured by the following method. (1) The absorbent article is cut out with a size of 20×40 mm centered on the measurement target area as a sample. (2) Using the X-ray fluoroscopy device FLEX-M863, perform a 360-degree scan of the sample. Specifically, X-ray fluoroscopy images are taken by rotating the sample by 0.2 degrees each time, 360 degrees, that is, 1800 X-ray fluoroscopy images are obtained, and the 1800 x-ray fluoroscopy images obtained are connected to form a 3D image. (3) A cross-sectional view including the edge of the measurement object is extracted from the 3D image, and the distance between the edges is measured from the extracted cross-sectional view. <The depth of the press ditch> The depth of the press ditch was measured by the following method. (1) A sample of a predetermined size including a pressing groove is cut out from the absorbent article. (2) Three-dimensional measuring device ((stock) KEYENCE company manufactures using high-precision shape measurement system (high-precision table: including KS-1100), high-speed and high-precision CCD laser displacement meter (controller: including LK-G3000V group) , G sensor head: LK-G30), measure the cross-sectional shape of the sample. (3) Perform image data processing on the measured cross-sectional shape to obtain the contour line of the smoothed cross-sectional shape. (4) According to the obtained contour The line defines the contour line of the cross-sectional shape of the press groove, and the depth of the press groove is obtained from the size of each part obtained from the contour line of the cross-sectional shape of the press groove. <Basis weight of the sheet> Basis weight of each sheet (including the absorbent layer) It is measured by the following method. (1) Cut out a 5cm×5cm part from the sheet as a sample. (2) Regarding the sample, dry it in an air atmosphere above 100°C. (3) Measure the mass of the sample. (4) ) Calculate the basis weight of the sample by dividing the area of the sample by the measured value of the mass. (5) The basis weight of the 10 samples is averaged as the basis weight of the sheet. <Thickness of the sheet> Each sheet (including the absorbent layer) The thickness of is measured by the following method. (1) Cut out a 5cm×5cm part from the sheet as a sample. (2) Regarding the sample, dry it in an air atmosphere above 100°C. (3) Use 15cm ² Determination of sub-thickness gauge ((shares) Daiei chemical Seiki Seisakusho type FS-60DS), thickness of the sheet to determine 3g / cm ² load measurement conditions. (4) at a sample thickness was measured three positions , And the average value of the thickness of the three positions as the thickness of the sheet. In addition, the thickness of the sheet can also be obtained from the 3D image of X-ray fluoroscopy. <Fiber density of the sheet> Fibers of each sheet (including the absorbent layer) Density is measured by the following method. (1) Calculate the basis weight and thickness of the flake using the above method. (2) Divide the thickness of the flake by the weight of the flake to calculate the fiber density of the flake. [0055] (Examples) ) As the sample of the example, the absorbent article 1 of the present embodiment was prepared. As the sample of the comparative example, an absorbent article (current product) was prepared, which is in the width direction and the position of the press groove is located in the center of the non-existing area , Neither the center exists nor the outside exists, and the distance between the two is approximately the same. However, the samples of Example 1 and Comparative Example 1 are the following products, which are equivalent to the first absorbent The basis weight of the absorbent layer of the layer 11 relative to the first absorbent layer 11 is the absorbent polymer containing 100% basis weight, which corresponds to the basis weight of the absorbent layer of the second absorbent layer 12 relative to the second absorbent layer 12 containing 30%. ~70% basis weight absorbent polymer. On the other hand, the samples of Example 2 and Comparative Example 2 are the following products, and the absorbent layer corresponding to the first absorbent layer 11 of the product is relative to the first absorbent layer 11 The basis weight of is the absorbent polymer containing 100% basis weight, which is equivalent to the absorbent layer of the second absorbent layer 12 is made of water-absorbent fiber pulp The composition does not contain absorbent polymers. In addition, the absorption rate (absorption time required to absorb physiological saline) of the samples of the examples and the samples of the comparative examples was measured. Fig. 12 is a schematic diagram illustrating the measurement method. [0056] The method for measuring the absorption rate (absorption time) was as follows. (1) Prepare a plate jig with a cylinder in which a cylinder 101 with an inner diameter of 30 mm is vertically coupled to the center of a substantially rectangular plate 102. An opening with an inner diameter of 30 mm is formed at the junction of the flat plate 102 and the cylinder 101. (2) A sample 104 (absorbent article) is placed on the base 103, and a flat plate 102 with a cylindrical flat jig is placed on the sample 104. (3) A predetermined load P is applied to the flat plate 102 such that a predetermined force is applied to the absorber of the sample 104 between the base 103 and the flat plate 102. A predetermined pressure, to the wearer contemplated that the sample 104 is in standing state of the waist, to apply 0.005 ~ 0.015kg / cm ² sample absorbent body 104, the pressure is preferably 0.007 ~ 0.012kg / cm ² of the In this way, the load P is applied to the flat plate 102. And, assuming that the wearer of the sample 104 is in a sitting state, the load is applied by applying a pressure of 0.03 to 0.2 kg/cm ² , preferably 0.05 to 0.1 kg/cm ^{2 to the absorber of the sample 104} P is applied to the plate 102. (4) A 0.9% concentration of physiological saline Q is dropped onto the sample 104 from the upper side of the cylinder 101 (imitating the urination of the wearer). At a dropping rate of 10 g/sec, the absorption capacity of the absorber of the sample 104 is 35% to 50%, preferably 40 to 45%, as the dropping amount per time. At this time, the absorption time (seconds) until the physiological saline Q on the surface of the sample 104 is absorbed by the sample 104 until the surface of the sample 104 disappears is measured. (5) After 5 minutes, measure the dripping and absorption time of the physiological saline Q in (4) above again. In addition, the absorption rate (absorption amount of physiological saline per unit time) can be calculated from the dripping amount/absorption time. The absorption rate can be compared by comparing the absorption time at the same dropping amount as the comparison of the absorption rate, or the absorption rate calculated from the dropping amount/absorption time can be directly compared. Here is the comparison of the absorption speed by comparing the absorption time at the same dropping amount. In this case, it can be said that the shorter the absorption time, the greater the absorption speed. [0057] The measurement results of the absorption time are as follows.

[0058] When the physiological saline Q is dropped for the first time (equivalent to the first urination), the absorbent polymer of the first absorbent layer 11 swells. As a result, in the samples of Examples 1 and 2, the central existing region 21 of the first absorbent layer 11 swelled greatly, and the outer existing region 22 did not swell much. Therefore, the angle formed by the wall surface on the side of the central existence area 21 of the press groove 5 with respect to the back sheet 3 is different from the angle formed by the wall surface on the side of the outside area 22 on the outside of the press groove 5 with respect to the back sheet 3. That is, the angle formed by the wall surface on the side of the central existing region 21 becomes larger, and the angle formed by the wall surface on the side of the outer existing region 22 does not become so large. On the other hand, in the samples of Comparative Examples 1 and 2, the angle formed by the wall surface on the side of the central presence area and the angle formed by the wall surface on the outer side of the area were substantially the same. Therefore, in the samples of Examples 1 and 2, compared with the samples of Comparative Examples 1 and 2, the dropped physiological saline Q easily flows to the squeeze groove 5 quickly, as shown in Table 1 at the time of the first drop , The time required for absorption is short (fast absorption speed). In particular, in the sample of Example 1 with a large absorption capacity, compared to the sample of Comparative Example 1, the absorption speed was increased by more than 1.5 times under standing and mid-waist conditions, and by more than 2 times under sitting conditions. Furthermore, when the physiological saline Q is dropped for the second time (equivalent to the second urination), the absorbent polymer of the first absorbent layer 11 further swells, and gel blocking is started. Therefore, in the sample systems of Examples 1 and 2, the angle formed by the wall surface on the side of the central existence region 21 becomes larger, and is different from the angle formed by the wall surface on the side of the outer existence region 22. On the other hand, the samples of Comparative Examples 1 and 2 differed in the angle formed by the wall surface on the side of the central presence area and the angle formed by the wall surface on the outer side of the area, which was smaller than the samples of Examples 1 and 2, respectively. Therefore, the samples of Examples 1 and 2, respectively, compared with the samples of Examples 1 and 2, in any of the standing, mid-waist conditions, and sitting conditions, the absorption speed was increased by more than two times. In this way, regardless of whether the absorbent layer corresponding to the second absorbent layer 12 contains an absorbent polymer, the sample of the example has a significantly improved absorption speed compared with the sample of the comparative example (current product), especially the second time When urinating, it has more than 2 times the absorption speed. That is, it is understood that the present absorbent article 1 has an absorption speed that is more than twice that of the current product in the second urination. Therefore, it is understood that with such a high absorption rate, the samples of the examples can easily maintain the freshness of the surface.

The absorbent article of the present invention is not limited to the above-mentioned respective embodiments, and may be appropriately combined or changed within a range that does not deviate from the purpose and spirit of the present invention.

1: Absorbent articles

2: Surface flakes

3: thin slices inside

4: Absorber

5: Squeeze ditch

6: Front squeeze ditch

6’: Rear squeeze ditch

6t: High density part

7: Side fold sheet

8: Linear elastic member

9: Exterior flakes

10: Fixed part

11: The first absorption layer

11a, 11a’: Liquid permeable sheet

11b: Absorbent material

11s1: Central configuration area

11s2: Outer configuration area

11t1: Joint area

11t2: Front joint area

11t2’: Rear joint area

12: The second absorption layer

12a, 12a’: Liquid permeable sheet

12b: Absorbent core

12T: Thick meat area

12S: Medium meat area

12R: thin meat area

14, 15: Absorbent polymer

16: mixture

21: Central existence area

22: Existing area outside

31: non-existent area

32: Non-existent area ahead

32’: Non-existent area behind

41: High-pressure press section

42: Low pressure section

a: thickness

b: penetration depth

d11, d12, d21, d22: distance

E21, E22, E31, E41, E42: End edge

G01~G05, G11, G12: gap

L: length direction

CL: Length direction centerline

T: thickness direction

W: width direction

CW: Centerline in the width direction

S, S0~S4: excrement

Q: Normal saline

Fig. 1 is a schematic plan view of the configuration of the absorbent article of the embodiment.

Fig. 2 is a cross-sectional view taken along line II-II of Fig. 1.

Fig. 3 is a schematic plan view of the structure of the first absorbing layer.

Fig. 4 is a cross-sectional view taken along the line IV-IV of Fig. 3.

Fig. 5 is a cross-sectional view taken along the line V-V of Fig. 3.

FIG. 6 is a schematic diagram of the existence area and non-existence area of FIG. 3.

Fig. 7 is a schematic plan view of the configuration of the second absorbing layer of the embodiment.

Fig. 8 is a cross-sectional view taken along the line VIII-VIII in Fig. 7.

Fig. 9 is a cross-sectional view illustrating the function of the absorbent article.

Fig. 10 is a cross-sectional view illustrating the relationship between the depth of the press groove and the thickness of the second absorbent layer.

Fig. 11 is a plan view schematically showing the structure of the press groove.

Fig. 12 is a schematic diagram illustrating the method of measuring the absorption rate.

1‧‧‧Absorbent articles

2‧‧‧Surface flakes

3‧‧‧Inside sheet

4‧‧‧Absorber

5‧‧‧Squeeze ditch

5t‧‧‧High-density part

7‧‧‧Side pleated sheet

8‧‧‧Linear elastic member

9‧‧‧Exterior sheet

10‧‧‧Fixed part

11‧‧‧The first absorption layer

11a, 11a’‧‧‧Liquid permeable sheet

11b‧‧‧Absorbent material

11t1‧‧‧Joint area

12‧‧‧Second absorption layer

12a, 12a’‧‧‧Liquid permeable sheet

12b‧‧‧Absorbent core

14,15‧‧‧Absorbent polymer

16‧‧‧Mixture

21‧‧‧Central Existence Area

22‧‧‧Existing area outside

31‧‧‧Non-existent area

E01, E02, E11, E12, E21, E22‧‧‧End edge

d11, d12, d21, d22‧‧‧distance

G01, G02, G11, G12‧‧‧Gap

Claims (9)

An absorbent article having a length direction, a width direction, and a thickness direction, and is provided with a surface sheet and an absorber located on the non-skin side of the surface sheet; The second absorbent layer on the skin side has a pair of squeezing grooves extending in the longitudinal direction and arranged side by side with an interval in the width direction to squeeze the surface sheet and the first and second absorbing layers; 1 The absorbent layer includes: located in the center of the aforementioned width direction, the central existence area where the absorbent polymer exists; located on the two outer sides of the aforementioned central existence area in the aforementioned width direction, the pair of outer existence areas where the absorbent polymer exists; and located in the aforementioned Between the central existence area and the aforementioned pair of outer existence areas, a pair of non-existent areas where the absorbent polymer does not exist; the boundary between the aforementioned central existence area and the aforementioned non-existent area is the aforementioned central existence area in contact with the aforementioned non-existent area The basis weight of the absorbent polymer is 1/3 of the highest value of the basis weight of the absorbent polymer in the central existing area, and the boundary between the outer existing area and the aforementioned non-existent area is in contact with the aforementioned non-existent area The part where the basis weight of the absorbent polymer in the aforementioned outer existence region is 1/3 of the highest value of the basis weight of the absorbent polymer in the aforementioned central existence region, in the width direction, one of the pair of press grooves and the other One is located within one and the other of the aforementioned pair of non-existent areas. The central existence area and the pair of outer existence areas are separated, and in the width direction, the distance between the end edge of the pressing groove and the end edge of the central existence area that are opposite to each other is shorter than the end edge of the pressing groove opposite to each other The distance from the edge of the aforementioned outer existing area. The absorbent article of claim 1, wherein the first absorbent layer includes a liquid-permeable sheet containing the absorbent polymer contained in the first absorbent layer, and in the non-existent area, the liquid-permeable sheet is on the skin side The surface and the surface on the non-skin side have joint areas joined to each other. In a plan view, the joint areas are expanded on both sides of the squeeze groove in the width direction. In the width direction, the inner edge of the joint area and The distance between the inner edge of the press groove is shorter than the distance between the outer edge of the joint area and the outer edge of the press groove. The absorbent article of claim 1 or 2, wherein the first absorbent layer includes a front non-existent area and a rear non-existent area, and the front non-existent area and the rear non-existent area are located in the longitudinal direction of the central existing area There is no absorbent polymer on the outside of the front and rear, and the absorbent article is provided with a front press groove and a rear press groove. The front press groove and the rear press groove extend in the width direction and are spaced apart in the length direction. Squeeze the aforementioned surface sheet and the aforementioned first suction side by side The receiving layer and the second absorbent layer, the front pressing groove and the rear pressing groove are located within 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 end edge of the front squeeze groove and the end edge of the center existing area that are opposed to each other is shorter than the distance between the end edge of the front squeeze groove and the outer edge of the front non-existent area that are opposed to each other. ; The distance between the end edge of the rear squeeze groove and the end edge of the central existing region that are opposite to each other is shorter than the distance between the end edge of the rear squeeze groove and the outer edge of the rear non-existent region that are opposite to each other. The absorbent article of claim 3, wherein the first absorbent layer is provided with a liquid-permeable sheet containing the absorbent polymer contained in the first absorbent layer, and the front non-existent area and the rear non-existent area are respectively The front joint area and the rear joint area where the skin-side surface and the non-skin side surface of the liquid-permeable sheet are joined to each other, in a plan view, the front joint area and the rear joint area are in the front squeeze groove and the back The both sides of the longitudinal direction of the squeeze groove expand. In the longitudinal direction, the distance between the inner edge of the front joint area and the inner edge of the front squeeze groove is shorter than the outer edge of the front joint area. Distance from the outer edge of the front squeeze groove; between the inner edge of the rear joining area and the back squeeze groove The distance between the inner edge is shorter than the distance between the outer edge of the rear joining region and the outer edge of the rear pressing groove. The absorbent article of claim 4, wherein, in the longitudinal direction, the distance between the inner end edge of the front joining area and the end edge of the central existence area facing the end edge is shorter than the front joining area The distance between the inner end edge of the front squeeze groove and the inner end edge of the front pressing groove; The distance between the inner edge of the joining area and the inner edge of the aforementioned rear press groove. The absorbent article according to claim 1, wherein, in the surface sheet, the fiber density of the region corresponding to the center existing region is higher than the fiber density of the region corresponding to each of the pair of outer regions. An absorbent article according to claim 1, wherein, in the thickness direction, the thickness of the second absorbent layer is set to a, and the penetration depth of the second absorbent layer into the press groove is set to b, the above b is satisfied (a/2)<b<a. The absorbent article according to claim 1, wherein, in the second absorbent layer, the thickness of the region corresponding to the central existing region is thicker than the thickness of the region corresponding to the outer existing region. Such as the absorbent article of claim 1, wherein the aforementioned squeeze groove contains the front The high-pressure press section with a deep depth in the thickness direction and the low-pressure press section with a shallow depth in the thickness direction, the high-pressure press section and the low-pressure press section are alternately formed side by side.

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