JP6260052B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a disposable diaper.

A disposable diaper may be used in combination with a urine picking pad, and it is important to place the urine picking pad attached to the disposable diaper at an appropriate position corresponding to the crotch part of the wearer.
Patent Document 1 includes an absorbent article body symmetrical in the width direction in which an absorbent body is disposed between a liquid-permeable top sheet and a liquid-impervious back sheet, and the absorbent body includes at least the absorbent article body. A portion located in the crotch part is divided into a first absorber portion and a second absorber portion in the width direction, and an absorber non-existing portion is provided between the first absorber portion and the second absorber portion. It is described that the absorber non-existing portion is located on the inner side of both longitudinal edges of the absorber and at the substantially central portion in the width direction.

  In Patent Document 2, the absorber disposed between the top sheet and the back sheet is provided with a hole provided at the center in the width direction along the longitudinal direction at least around the leg, and There is described an absorbent article formed of a pair of leg-line absorbers located on both sides in the width direction. At least a part of the top sheet and the back sheet located in the hole is joined to form a concave dent from the top sheet to the back sheet side, and between the pair of leg-line absorber parts and the back sheet In addition, a second elastic body is disposed along the longitudinal direction.

  Patent Document 3 is formed by superposing upper and lower two-layer absorbent web bodies, and the lower layer absorbent web body is formed to have the same or narrower width as the upper layer absorbent web body. At least one opening having a smaller area than that of the lower layer absorbent web is disposed at the position where the absorbent web is disposed, and the periphery of the opening is a dispersion of the superabsorbent resin powder as compared to other portions. A disposable absorbent article having a high density is described.

JP 2001-293034 A JP 2007-185240 A Japanese Patent Laid-Open No. 2003-070842

The disposable absorbent article described in the above-mentioned Patent Document 1 is supposed to prevent the absorbent pad from being misaligned by mounting the absorbent pad in the absorber absent portion. Moreover, in the disposable absorbent article described in Patent Document 2, the inner pad can be placed at an appropriate position by placing the inner pad in the recessed portion. However, in any case, even if the position of the absorbent pad and the inner pad of the size suitable for the absorber absent part and the recessed part can be aligned, Even if one of the absorbent pads and the inner pad can be aligned, the alignment of the other absorbent pad and the inner pad is not easy.
Furthermore, in the disposable diaper described in Patent Document 3, the width of the crotch part is narrow and the structure does not have an absorbent body around the legs. Even if a gather is installed on the side of the absorbent body, the side part rises due to the rigidity of the lower layer absorbent body. Decreased, and the holdability of the urine collecting pad was hindered.

  This invention is made | formed in view of the above points, and makes it a subject to provide the absorbent article which aimed at the improvement of the mounting | wearing ease of the urine picking pad to a disposable diaper.

  The present invention is an absorbent article that can be used by putting a separate pad inside, comprising a top sheet, a back sheet, and an absorbent body sandwiched between both sheets, the absorbent body on the skin contact surface side The opening has a step portion between the inside and the outside of the opening, and at least one of the front and rear end portions in the longitudinal direction of the opening has two or more step portions in plan view. The absorbent article has one apex, and one of the two or more apexes coincides with the center in the width direction.

  The absorbent article of the present invention has two or more vertices in the protruding portion or the recessed portion on the inside or outside of the opening in a plan view when the urine removing pad is used together. The product in the longitudinal direction of the pad is easy to align, and one of the two or more vertices coincides with the center in the width direction. There is an excellent effect that the positioning of the is easy.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which showed the expandable disposable diaper as preferable one Embodiment in the absorbent article of this invention, (a) is shown typically from the skin surface side (surface sheet side) of the state which expand | deployed the expandable disposable diaper. FIG. 2B is a developed plan view partially cut away, and FIG. 4B is a longitudinal sectional view of the crotch part in the X direction. BRIEF DESCRIPTION OF THE DRAWINGS It is drawing which showed the expandable disposable diaper as another preferable embodiment in the absorbent article of this invention, (a) is typical from the skin surface side (surface sheet side) of the state which expand | deployed the expandable disposable diaper. It is a partial notch expansion | deployment top view shown in (b), (b) is a longitudinal cross-sectional view of the crotch part of the X direction. It is drawing which showed an example of the shape and vertex of an opening part, (a) is an example of the shape which the absorber of the longitudinal direction (Y direction) both ends of the opening part protruded inside the longitudinal direction, (b) is (A) is an example in which the overhang is larger than (a), (c) is an example in which the absorbers at both ends of the opening are recessed outward in the longitudinal direction, and (d) is an example of both ends of the opening. (E) is an example of the shape in which the absorbers on both sides in the width direction (X direction) of the opening protrude inward in the width direction, and (f) It is an example of the shape where the absorber of the both sides of an opening part was dented in the width direction outer side. It is the top view which showed typically the external example of the 1st absorber and the 2nd absorber 32, (a) is an example of a rectangular-shaped 1st absorber and what is called an hourglass-shaped 2nd absorber, b) is an example of a so-called hourglass shape, (c) is an example of a shape in which the corners are notched in the shape shown in (b), and (d) is a rectangular first absorber and second shape. It is an example which showed the absorber 32. FIG. It is drawing which showed the deployment type disposable diaper for adults as other preferable one embodiment in the absorptive article of the present invention, and (a) is the skin side (surface sheet side) of the state which developed the deployment type disposable diaper. It is the expansion | deployment top view typically shown from (b), and the longitudinal cross-sectional view of the crotch part of the X direction. (A) is a cross-sectional view of the crotch part in the X direction with a urine collecting pad as an example of an absorbent pad inside a disposable diaper, and (b) is a urine sample as an example of the absorbent pad. It is the top view which showed the pad. It is the perspective view which showed typically the example of wearing of the disposable diaper of this invention, (a) is the perspective view which showed positioning of the disposable diaper with respect to a wearer, (b) is urine with respect to a disposable diaper It is the perspective view which showed positioning of the collection pad, and the A section enlarged plan view, (c) is the perspective view which showed wearing of the urine collection pad to the wearer, (d) is the disposable diaper to the wearer It is the perspective view which showed mounting | wearing, (e) is the perspective view which showed mounting | wearing and fixing of the disposable diaper to a wearer.

A preferred embodiment of a diaper as an absorbent article according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the disposable diaper 10 of this embodiment is a liquid-permeable surface sheet 1 disposed on the skin contact surface side, a moisture permeable and liquid impermeable surface disposed on the non-skin contact surface side. Back sheet 2 and an absorbent body 3 that is sandwiched between both sheets and absorbs and holds liquid. Hereinafter, “disposable diapers” may also be referred to as “diapers”.
The top sheet 1 and the back sheet 2 have a vertically long shape. The absorbent body 3 has a slightly shorter length in the article longitudinal direction (Y direction) and the article width direction (X direction) than these, and is located at the center of the article width direction at the crotch and is open to the skin contact surface side. Part 33 is arranged. The absorbent body 3 is disposed substantially in the center with its longitudinal direction coinciding with the longitudinal direction of the top sheet 1 and the back sheet 2. The absorber 3 is sandwiched between the intermediate sheets 5 (5a, 5b). The absorbent body 3 including the top sheet 1, the back sheet 2, and the intermediate sheet 5 is bonded by, for example, a hot melt adhesive.

The absorber 3 has a step 34 around the opening 33. That is, the inside of the opening 33 includes a low-thickness portion 35 that is thinner than the thicknesses of the side absorbers 3 (3a), 3 (3b), the front end absorber 3 (3c), and the rear end absorber 3 (3d). It has become. Due to the difference in thickness, a stepped portion 34 is formed in which the periphery of the opening 33 becomes high. The absorbent body 3 may be rectangular, for example, or the outer edge may be curved or bent inwardly at the crotch portion, and may be spread outward at the site of the ventral side F or the back side R. In any case, the opening 33 is provided at the center thereof.
The low-thickness portion 35 can be made by uneven distribution of the absorbent body (for example, reduction in the basis weight of the portion corresponding to the low-thickness portion), or by uneven distribution of the absorbent body and embossing.
In addition, although not shown, the opening 33 may penetrate without having the low-thickness portion 35. In this case, the thickness portion of the absorber 3 along the opening 33 becomes the step 34.

  The step portion 34 has two or more vertices T (T1, T2) in a plan view on at least one of the front and rear end portions in the longitudinal direction, for example, the front end portion. One coincides with the center of the article width direction. In the illustrated example, the front end side has three vertices T (T1, T2, T2) in plan view, and the vertex T1 coincides with a center line CL indicating the center in the article width direction. Similarly, in the illustrated example, the rear end side has three vertices T (T1, T2, T2) in plan view, and one of these three vertices T1 is connected to the center line CL. Match.

  In the present specification, the tip portion of the absorbent layer 3 that projects inward in the longitudinal direction (Y direction) of the opening 33 and the tip portion of the absorbent layer 3 that is recessed outward in the longitudinal direction of the opening 33 are referred to as apex T. The tip portion refers to the point closest to the center of the opening 33 in the case of the absorbing layer 3 projecting inward in the longitudinal direction of the opening 33, and the tip portion is the case of the absorbing layer 3 recessed to the outside in the longitudinal direction of the opening 33. The point farthest from the center of the opening 33.

  In the disposable diaper 10 as an absorbent article according to the present invention, the absorbent body 3 may have a two-layer structure. A preferred example will be described below with reference to FIG.

  As shown in FIG. 2, the absorbent body 3 has an opening 33 penetrating in the thickness direction, and the first absorbent body 31 disposed on the skin contact surface side and the back sheet 2 side thereof. It is comprised by the 2nd absorber 32 arranged. The first absorber 31 is arranged in an upper layer than the second absorber 32 through the intermediate sheet 5.

  For example, the first absorbent body 31 may have a rectangular outer shape, or the shape of the outer edge is curved inwardly at the crotch C or bent or bent, and at the site of the abdominal side F or the back side R, the outer side is outside. In any case, the opening 33 is provided at the center thereof. The first absorber 31 on the side in the width direction of the opening 33 becomes the side absorbers 3a and 3b.

As for the 2nd absorber 32, the longitudinal direction both end part side is wider than the width | variety of the said opening part 33, and the longitudinal direction center part is narrower than the width | variety of the said opening part 33. FIG. For example, the second absorbent body 32 may have a shape curved or bent inward at the crotch part C. Thereby, a gap in plan view is formed between the first absorber 31 and the second absorber 32, and the gap becomes the separation portion 4 (4a, 4b). Accordingly, the length of the separation portion 4 is equal to or less than the length of the opening portion 33 in the longitudinal direction. In addition, the first absorber 31 and the second absorber 32 overlap each other at both ends in the longitudinal direction of the opening 33.
The periphery of the opening 33 forms a step 34 depending on the thickness of the first absorber 31.

  The step portion 34 has two or more vertices T (T1, T2) in a plan view on at least one of the front and rear end portions in the longitudinal direction, for example, the front end portion. One coincides with the center of the article width direction. In the illustrated example, the front end side has three vertices T (T1, T2, T2) in plan view, and the vertex T1 coincides with the center in the article width direction. Similarly, in the illustrated example, the rear end side has three vertices T (T1, T2, T2) in plan view, and one of these three vertices T is at the center in the article width direction. It coincides with the center line CL located.

An example of the opening 33 and the vertex T will be described with reference to FIG. In each drawing of FIG. 3, the upper side of the drawing represents the rear side of the article, and the lower side of the drawing represents the front side of the article.
As shown in FIG. 3A, the opening 33 disposed in the absorber 3 is substantially rectangular in plan view, and the absorber 3 at the front end and the rear end in the longitudinal direction (Y direction) is the length of the opening 33. A convex shape projecting inward in the direction is formed, and the absorbent bodies 3 on both sides of the front end and both sides of the rear end are formed in a concave shape that is recessed outward in the longitudinal direction. In the case of such a convex shape, the vertex is defined as a vertex T (T1) at a position that projects most from the center 33C of the opening 33 in the center direction. On the other hand, in the case of a concave shape, a position that is most recessed from the center 33C of the opening 33 is defined as a vertex T (T2). Accordingly, the apexes are arranged with one apex T1 at the center in the article width direction and two apexes T2 on both sides of the front and rear ends, respectively. In other words, the vertex T <b> 1 is on the center line CL in the longitudinal direction of the opening 33. Further, there are two or more vertices T1 and T2 in the article width direction. In addition, it is preferable that each convex shape and concave shape are comprised by a curved surface.

Each length Ltb of the convex shape 3Tb (see FIG. 3 (a)) and the concave shape 3Db (see FIG. 3 (c)) on the rear side of the disposable diaper 10 (see FIGS. 1 and 2) in the longitudinal direction of the article. , Ldb is not less than 10 mm, preferably not less than 20 mm, more preferably not less than 25 mm, as a center mark in the longitudinal direction of the disposable diaper 10 or from the viewpoint of aligning urine collecting pads having different lengths. From the viewpoint of aligning the length of the urine collecting pads having different lengths and the positioning of the disposable diaper 10 on the back side, it is 120 mm or less, preferably 110 mm or less, more preferably 100 mm or less. And they are 10 mm or more and 120 mm or less, Preferably they are 20 mm or more and 110 mm or less, More preferably, they are 25 mm or more and 100 mm or less.
The lengths Ltf and Ldf of the convex shape 3Tf (see FIG. 3 (a)) and the concave shape 3Df (see FIG. 3 (c)) on the front side of the disposable diaper 10 are also the length Ltb, It is defined in the same way as Ldb.
Further, the locus radius Rb (curvature radius) in plan view of the convex shape 3Tb on the rear side of the disposable diaper 10 is 10 mm or more, preferably 20 mm or more from the viewpoint that the convex shape needs to be easily understood. More preferably, it is 25 mm or more, and preferably 60 mm or less, more preferably 55 mm or less, from the viewpoint of clarifying the center in the width direction that sharpens the tip of the convex shape. And they are 10 mm or more and 60 mm or less, Preferably they are 20 mm or more and 60 mm or less, More preferably, they are 25 mm or more and 55 mm or less.

It is preferable that the concave shape 3Tf on the front side of the disposable diaper 10 spreads outside the width of the opening 33 in the article width direction at the crotch from the viewpoint of fitting with the front heel of the wearer.
The locus radius Rf (curvature radius) in plan view of the convex shape 3Tf on the front side of the disposable diaper 10 is 50 mm or more, preferably 60 mm or more, more preferably 65 mm or more from the viewpoint of fit around the wearer's stomach. Yes, from the viewpoint of maintaining fit and rigidity of the tape adhesive portion 20 by the wearer's front side buttock, it is preferably 150 mm or less, more preferably 140 mm or less. And they are 50 mm or more and 150 mm or less, Preferably they are 60 mm or more and 140 mm or less, More preferably, they are 65 mm or more and 140 mm or less.
The trajectory radius Rf of the front convex shape 3Tf is preferably larger than the trajectory radius Rb of the rear convex shape 3Tb.

  As shown in FIG. 3 (b), in the shape shown in FIG. 3 (a), when the protruding shape has a longer protrusion shape and the recess has a deep but concave shape, the vertex T (T1, T1, T2) is defined. The vertex T1 is on the center line CL in the longitudinal direction of the opening 33. Further, there are two or more vertices T in the article width direction. Each convex shape may be a curved surface or a bent surface with a small curvature at the tip.

  As shown in FIG. 3 (c), in the opening 33, a first concave shape in which the absorbent bodies 3 at both ends of the rectangular shape are recessed in the longitudinal direction of the article, and a second concave portion that is further deeply recessed in the first concave shape. When there is a shape, the most concave position from the center 33C of the opening 33 in the first concave shape is the vertex T (T2a, T2b), and from the center 33C of the opening 33 in the second concave shape. The position that is most recessed from the center side is defined as a vertex T (T2c). Therefore, the vertex T2c is on the center line CL in the longitudinal direction of the opening 33. Further, there are two or more vertices T in the article width direction.

  As shown in FIG. 3D, in the shape shown in FIG. 3A, the first convex shape in which the absorbers 3 at both ends of the opening 33 project in the center direction of the opening 33, and the first When there is a second convex shape in which the absorber 3 further protrudes from the convex shape, the position of the first convex shape that protrudes most in the center direction when viewed from the center 33C of the opening 33 is the vertex T (T1a, T1b). In the second convex shape, a position that protrudes most in the center direction when viewed from the center 33C of the opening 33 is defined as a vertex T (T1c).

  As shown in FIG. 3 (e), in the shape shown in FIG. 3 (a), when the absorbent body 3 on both sides of the opening 33 in the article width direction protrudes toward the opening 33, the opening is the most. Let the part which protruded to 33 side be a pair of vertex T (T3a, T3b). As shown in FIG. 3 (1), the shape of the side portion of the opening 33 may be a straight line parallel to the longitudinal direction of the article, but from the viewpoint of preventing discomfort during mounting, as in this example It is preferable that the shape is curved in a convex shape inside the opening 33 in the longitudinal direction, and the shape of both sides of the opening 33 is curved in a convex manner with respect to the center line side of the opening 33 in the longitudinal direction. The shape is preferred.

  As shown in FIG. 3 (f), in the shape shown in FIG. 3 (a), the absorbent bodies 3 on both sides of the opening 33 in the article width direction are recessed outward from the opening 33 in the width direction (X direction). In the case of an elliptical shape, the most concave portions from the opening 33 are defined as a pair of apexes T (T4a, T4b). In this case, since the recessed portion is trapezoidal, two corners of the trapezoidal corners are apexes T4a and T4b.

  In addition, among the opening 33 and the vertex T described with reference to FIG. 3A, two vertices T1 (T1a) and T1 (T1b) that coincide with the center in the article width direction are each a part of an arc. And it is preferable that the absorber 3 is convex in the longitudinal direction inner side of the opening part 33, and the curvature of the circular arc containing one vertex T1a is higher than the curvature of the circular arc containing the other vertex T1b. The same applies to the other configurations shown in FIGS. 3B to 3F.

The said 1st absorber 31 and the 2nd absorber 32 can take various shapes.
For example, as shown to Fig.4 (a), the 1st absorber 31 has a rectangle, and has the opening part 33 of the shape similar to what was demonstrated in the said Fig.3 (a). The second absorbent body 32 has a so-called hourglass shape constricted at the center in the longitudinal direction, and the first absorbent body 31 and the second absorbent body 32 overlap each other at both ends of the longitudinal opening 33. In addition, the width of the second absorber 32 is narrower than the width of the opening 33 in plan view at the central portion in the longitudinal direction.

As shown in FIG. 4B, the first absorber 31 has a so-called hourglass shape with a narrowed central portion, and has a rectangular opening 33. The second absorber 32 has a so-called hourglass shape constricted at the center in the longitudinal direction.
And the 1st absorber 31 and the 2nd absorber 32 have overlapped in the both ends side of the longitudinal direction of the opening part 33, and the width | variety of the 2nd absorber 32 is larger than the width | variety of the opening part 33 planarly viewed in the longitudinal direction center part. Is narrower.
In other words, from the viewpoint of the fit of the crotch part, it is preferable that the shape of the outer side part in the crotch part of the first absorbent body 31 has a concave shape curved toward the opening 33 side.
As shown in FIG. 4C, the shape of the first absorbent body 31 in the configuration shown in FIG. Other shapes of the second absorber 32 and the opening 33 are the same as those shown in FIG.

  As shown in FIG. 4D, in the configuration shown in FIG. 4A, the first absorbent body 31 and the second absorbent body 32 may be rectangular. In this case, the width of the second absorber 32 is narrower over the entire length direction than the width of the opening 33.

4A to 4D, the first absorbent body 31 and the second absorbent body 32 are overlapped on both end sides of the opening 33 in the longitudinal direction of the article. More specifically, the first absorbent body 31 and the second absorbent body 32 overlap each other in the convex shapes 3Tf and 3Tb in which the absorbent body 3 protrudes inside the opening 33 at the front and rear end portions in the longitudinal direction of the article. The second absorbent body 32 is arranged longer in the longitudinal direction of the article than between apexes T arranged at the front and rear ends of the opening 33.
Furthermore, the width of the second absorber 32 is narrower than the width of the opening 33 in plan view at a position corresponding to the crotch.

  Next, the first absorber 31 will be described in detail with reference to FIG. 1 and FIG.

As shown in FIGS. 1, 2 and 3, the maximum width Wab in the article width direction (X direction) of the absorbent body 3 referring to FIG. 1 and the first absorbent body 31 referring to FIG. From the viewpoint of preventing leakage and maintaining the fit at the thigh, it is 240 mm or more, preferably 260 mm or more, more preferably 280 mm or more, and from the viewpoint of the size of the hip size of an adult unfoldable disposable diaper, Is 400 mm or less, more preferably 380 mm or less. And it is 240 mm or more and 400 mm or less, Preferably it is 260 mm or more and 400 mm or less, More preferably, it is 280 mm or more and 380 mm or less.
The length Lab in the longitudinal direction of the article (Y direction) is 600 m or more, preferably 650 mm or more, more preferably 670 m or more, from the viewpoint of the length of the inseam of the subject care recipient and leakage prevention, and more preferably 670 m or more. From the viewpoint of the caregiver's rise and fit, the length is preferably 800 mm or less, more preferably 860 mm or less. And it is 600-900 mm, Preferably it is 650-900 mm, More preferably, it is 670-860 mm.

The width Wh in the X direction of the opening 33 is 80 mm or more, preferably 100 mm or more, more preferably 120 mm or more from the viewpoint of improving the fit of the crotch part, and 240 mm or less from the viewpoint of preventing leakage from the crotch. Preferably, it is 220 mm or less. And they are 80 mm or more and 240 mm or less, Preferably they are 100 mm or more and 220 mm or less, More preferably, they are 120 mm or more and 220 mm or less.
The length Lh in the Y direction of the opening 33 is 200 mm or more, preferably 240 mm or more, and more preferably 280 mm or more from the viewpoint of improving the fit and flexibility of the crotch part, and prevents leakage from the buttocks. From the viewpoint, it is 600 mm or less, preferably 580 m or less, and more preferably 560 mm or less. And it is 200 mm or more and 600 mm or less, Preferably it is 240 mm or more and 580 m or less, More preferably, it is 280 mm or more and 560 mm or less.

The absorbent body 3 (see FIG. 1) and the first absorbent body 31 (see FIG. 2) are made of pulp. Or it is preferable that the 1st absorber 31 consists of a pulp and a water absorption polymer. The basis weight of the pulp, from the viewpoint of preventing twisting of the absorber, 100 g / ^{m 2} or more, preferably 120 g / ^{m 2} or more, from the viewpoint of improving the fit around the thighs base, 400 g / ^{m 2} Hereinafter, it is preferably 360 g / m ² or less, more preferably 340 g / m ² or less. Then 100 g / ^{m 2} or more 400 g / ^{m 2} or less, preferably 120 g / ^{m 2} or more 360 g / ^{m 2} or less, more preferably 120 g / ^{m 2} or more 340 g / ^{m 2} or less. If the basis weight of the pulp is too small, the rigidity of the absorbent body becomes low and it is easy to twist. On the other hand, if the basis weight of the pulp is too large, the rigidity of the absorbent body becomes too diversified and the fit property is lowered.
The basis weight of the water-absorbing polymer is 30 g / m ² or more, preferably 40 g / m ² or more, more preferably 40 g / m ² or more from the viewpoint of maintaining the absorption amount and preventing leakage. From the viewpoint of improving the viscosity, it is 300 g / m ² or less, preferably 250 g / m ² or less, and more preferably 225 g / m ² or less. And it is 30 g / m ² or more and 300 g / m ² or less, preferably 40 g / m ² or more and 250 g / m ² or less, and more preferably 40 g / m ² or more and 225 g / m ² or less. If the basis weight of the absorbent polymer is too small, the absorption performance is lowered, and if it is too large, the rigidity of the absorbent body when swollen becomes too high, and the fit property is lowered.

  The basis weights of the side absorbent bodies 3a and 3b of the absorbent body 3 (see FIG. 1) and the first absorbent body 31 (see FIG. 2) are within the basis weight range of the first absorbent body 31, and From the viewpoint of preventing leakage around the base of the thigh, more than 1.1 times, preferably 1.2 times or more, more preferably 1. It is preferably 25 times or more. By having such an absorbent basis weight, leakage at the crotch portion is prevented, and the liquid spreading from the groove is preferably drawn into the absorbent on the back side and absorbed. Moreover, the side part absorbers 3a and 3b located in the crotch side edge part absorb and excrete excretion, and the groove | channel comprised by the opening part 33 becomes deep, and prevents an outside leak.

  Further, the area Sh of the opening 33 with respect to the area Sa of the outer shape of the absorber 3 (see FIG. 1) and the first absorber 31 (see FIG. 2) is such that the area ratio Sh / Sa is 15% or more, preferably It is 18% or more, more preferably 20% or more, and preferably 50% or less. And they are 15% or more and 50% or less, Preferably they are 18% or more and 50% or less, More preferably, they are 20% or more and 50% or less. If the area ratio is too small, it is not preferable from the viewpoint of lowering the flexibility, and if it is too large, it is not preferable from the viewpoint of preventing the twisting of the absorbent body.

  As shown in FIG. 2, the first absorber 31 is preferably in an upper layer at a portion overlapping the second absorber 32. Since the opening 33 of the first absorber 31 is located on the second absorber 32, it becomes a leak-proof wall for absorbing excreted urine and can prevent transmission leakage from the back side or the abdomen side. .

Next, the second absorber 32 will be described in detail with reference to FIG.
The second absorbent body 32 is preferably on the lower layer side (the back sheet 2 side) of the first absorbent body 31. In addition, the 2nd absorber 32 may exist in the upper layer side (surface sheet 1 side) of the said 1st absorber 31. FIG.
In the second absorbent body 32, the width of the ventral side F or the back side R is preferably wider than the width of the crotch C, and the width of the second absorbent 32 is the ventral side F or back of the first absorbent 31. It is preferable that the width of the side portion R is narrower. Further, in the crotch part C, the width is preferably narrower than or equal to the width Wh of the opening 33 of the first absorbent body 31. For example, the width Wc of the second absorbent body 32 in the crotch part C is 60 mm or more, preferably 75 mm or more, more preferably 90 mm or more, from the viewpoint of maintaining the absorption surface and preventing leakage, so that the fit is improved when worn. From the viewpoint of reducing discomfort, it is 200 mm or less, preferably 180 mm or less, and more preferably 160 mm or less. And they are 60 mm or more and 200 mm or less, Preferably they are 75 mm or more and 180 mm or less, More preferably, they are 90 mm or more and 160 mm or less. When the widths Wh and Wc are the same, the side portion of the second absorbent body 32 that is arranged in the article longitudinal direction (Y direction) in a plan view is the side portion of the opening 33 that is arranged in the article longitudinal direction. It will be in the state which touched. In three dimensions, since the intermediate sheet 5 is arranged between the first absorbent body 31 and the second absorbent body 32 in the crotch part C, the first absorbent body 31 and the second absorbent body 32 are It is separated.

The maximum width in the article width direction (X direction) of the second absorbent body 32 is preferably 140 mm or more, more preferably 160 mm or more from the viewpoint of absorption performance, and 400 mm or less from the viewpoint of fit and difficulty of twisting. , Preferably 380 mm or less, more preferably 360 mm or less. And they are 140 mm or more and 400 mm or less, Preferably they are 160 mm or more and 380 mm or less, More preferably, they are 160 mm or more and 360 mm or less.
The length in the longitudinal direction of the article (Y direction) is 500 m or more, preferably 540 mm or more, more preferably 580 mm or more from the viewpoint of absorption performance, and preferably 900 mm or less, more preferably 860 mm or less from the viewpoint of size appropriateness. It is. And it is 500 to 900 mm, Preferably it is 540 to 900 mm, More preferably, it is 580 to 860 mm.
Each of the above numerical values is appropriately selected depending on the size of the wearer's body shape. For example, the size of the diaper is appropriately selected according to S size, M size, L size, LL size, and the like.

The second absorbent body 32 is made of pulp. Or it is preferable that the 2nd absorber 32 consists of a pulp and a water absorption polymer. The basis weight of the pulp, from the viewpoint of preventing twisting of the absorber, 100 g / ^{m 2} or more, preferably 120 g / ^{m 2,} still more preferably 120 g / ^{m 2} or more, in view of the absorbent and fit of the crotch portion To 400 g / m ² or less, preferably 360 g / m ² or less, and more preferably 340 g / m ² or less. Then 100 g / ^{m 2} or more 400 g / ^{m 2} or less, preferably 120 g / ^{m 2} or more 360 g / ^{m 2} or less, more preferably 120 g / ^{m 2} or more 340 g / ^{m 2} or less. If the basis weight of the pulp is too small, the rigidity of the absorbent body becomes low and it is easy to twist. On the other hand, if the basis weight of the pulp is too large, the rigidity of the absorbent body becomes too diversified and the fit property is lowered.
The basis weight of the water-absorbing polymer, from the viewpoint of preventing and leakage maintain absorption, 30 g / ^{m 2} or more, preferably 40 g / ^{m 2} or more, from the viewpoint of the fit of the swollen absorber, 300 g / ^{m 2} Hereinafter, it is preferably 250 g / m ² or less, more preferably 225 g / m ² or less. And it is 30 g / m ² or more and 300 g / m ² or less, preferably 40 g / m ² or more and 250 g / m ² or less, and more preferably 40 g / m ² or more and 225 g / m ² or less. If the basis weight of the absorbent polymer is too small, the absorption performance is lowered, and if too large, the rigidity of the absorbent body when swollen is lowered.

The second absorbent body 32 overlaps the first absorbent body 31 in the thickness direction at least on the end side in the longitudinal direction of the article with respect to the separation portion 4, that is, on the ventral side F or the back side R. For example, it overlaps at both ends in the longitudinal direction of the opening 33. The length of the overlapping portion in the longitudinal direction is 50 mm or more, preferably 70 mm or more, and more preferably 80 mm or more from the viewpoint of preventing transmission leakage.
As described above, since the first absorber 31 and the second absorber 32 are overlapped with each other, the thickness is increased. Therefore, the first absorber 31 and the second absorber 32 can be easily fitted to the collar portion, and transmission leakage is prevented. Moreover, by becoming 2 layers, rigidity increases and absorption performance increases.

  Although not shown in the drawings, the second absorbent body 32 may be provided with a slit at the center in the width direction of the crotch portion or two slits on the left and right sides of the center in the width direction. The width of the slit is preferably 3 mm or more, and more preferably 25 mm or less from the viewpoint of facilitating folding in the width direction during mounting. The length of the slit is preferably 80 mm or more, more preferably 120 mm or more, and preferably 400 mm or less in order to diffuse the liquid in the front-rear method of the absorber. And preferably they are 80 mm or more and 400 mm or less, More preferably, they are 120 mm or more and 400 mm or less.

An elastic member that is stretched and bonded in the longitudinal direction may be disposed at the center of the crotch part of the second absorbent body 32. The fit of the crotch is further improved by this elastic member.
Moreover, it is preferable from the viewpoint of improving the flexibility of the first absorbent body 31 that the back surface of the intermediate sheet 5 and the second absorbent body 32 are not joined by an adhesive in the vicinity of the crotch side edge of the second absorbent body 32.

The absorber 3 may be embossed.
Further, the thickness of the absorbent body 3 is preferably thicker at the side than at the center from the viewpoint of preventing leakage because the gap around the large recess can be reduced.

Each of the intermediate sheets 5 and the absorbent polymer is preferably subjected to antibacterial deodorizing treatment in view of hygiene. Examples of the antibacterial agent for antibacterial treatment include antibacterial agents such as silver-based, copper-based or zinc-based substances or salts thereof, or quaternary ammonium salts. Examples of the deodorant include activated carbon, zeolite, silica gel, polygalactosamine, catechin, chitosan, chitin, polyaniline and the like.
Further, as shown in FIG. 1, the intermediate sheet 5 disposed between the absorber 3 and the back sheet 2, and between the first absorber 31 and the second absorber 32 as illustrated in FIG. The intermediate sheet 5 may be a colored intermediate sheet. The colored intermediate sheet is made of a backing paper and a nonwoven fabric. By using the colored intermediate sheet as described above, when a urine collecting pad (not shown) is mounted, the color of the intermediate sheet is visually recognized to serve as a mark for the mounting position.

  Next, details of the disposable diaper other than the configuration described with reference to FIGS. 1 and 2 will be described with reference to FIG. 5 shows details of the configuration shown in FIG. 2, but the same applies to the configuration shown in FIG. Further, in FIG. 5, the reference numerals indicating the main components attached to FIGS. 1 and 2 are also attached.

As shown in FIG. 5, the absorbent body 3 having the opening 33 configured as described above is disposed between the top sheet 1 and the back sheet 2.
On the skin surface side of the top sheet 1, a pair of side sheets 7 (7 a, 7 b) is disposed from both sides in the longitudinal direction (Y direction) toward the outside in the width direction (X direction).
On the non-skin contact surface side of the back sheet 2, an exterior sheet 8 made of a nonwoven fabric is disposed so as to cover the entire surface. By this exterior sheet 8, the outside of the disposable diaper 10 has a soft touch and texture.

  The lengths in the longitudinal direction (Y direction) of the side sheets 7 and the exterior sheet 8 are approximately the same as the lengths in the longitudinal direction (Y direction) of the top sheet 1 and the back sheet 2, respectively. Furthermore, the side sheet 7 and the exterior sheet 8 protrude outward in the width direction (X direction) from the top sheet 1 and the back sheet 2 at the abdominal side F and the back side R, and are joined by a hot melt adhesive or the like. Thereby, the external shape of the disposable diaper 10 is formed. The disposable diaper 10 is disposed on the abdomen side F disposed on the abdomen side of the wearer at the time of wearing, the crotch C disposed on the crotch part of the wearer, and the back side of the wearer in the plan view of the deployed state. The crotch part C as a whole has a shape that is bound inward in the width direction, that is, a so-called general hourglass shape.

  A leak-proof cuff 72 composed of a three-dimensional gather provided with an elastic member 71 is disposed at the inner end of each side seat 7 near the center in the width direction. A well-known thing can be used for the leak-proof cuff 72, and what is called a double gather, a T-shaped gather, a folding back gather, etc. can be employ | adopted. When the disposable diaper 10 is mounted, the elastic member 71 contracts and a leak-proof cuff 72 is formed in the crotch C.

  Elastic members 73 that allow the left and right thigh roots to expand and contract are respectively stretched at portions located between the side sheet 7 and the back sheet 2 outside the side absorbers 3a and 3b serving as leg gathers. Glued or fixed in state. Thus, leg gathers are formed by arranging the elastic members 73 on the outer sides of the side sheets 7 in the width direction. The elastic member 73 can be the same type as the elastic member 71.

Further, a plurality of absorber gather elastic members 75 (see FIG. 1 (2)) are stretched at the portions located on the back sheet 2 side of the side absorbers 3a and 3b serving as leg absorbers. It is glued or fixed with. As this elastic member, thread rubber, flat rubber, a film-like elastic body and the like are preferable. It is preferable that the rubber thread is evenly arranged on the left and right sides of two to six on one side. The fineness is 320 dtex or more, preferably 480 dtex or more, more preferably 620 dtex or more from the viewpoint of maintaining the tensile stress and high elongation, and 1240 dtex or less, preferably from the viewpoint of facilitating expansion and contraction without the tensile stress becoming too high. 1000 dtex or less, more preferably 940 dtex or less. And it is 320 dtex or more and 1240 dtex or less, Preferably it is 480 dtex or more and 1000 dtex or less, More preferably, it is 620 dtex or more and 940 dtex or less. Examples of the adhesive of the absorber gather elastic member 75 include a normal hot melt adhesive. And in the state which developed a disposable diaper, it is preferred that side absorbers 3a and 3b used as a leg absorber stand up by an absorber gather which the absorber gathers elastic member 75 contracts.
Therefore, in a state where the tape stopper is unfolded, the side absorbent bodies 3a and 3b contract and the front and rear parts of the absorbent body 3 rise. For this reason, leakage of urine, loose stool, etc. excreted inside the absorber 3 can be prevented. Further, it is possible to prevent the leakage of the cleaning liquid when changing disposable diapers. Furthermore, when the urine absorbing pad is attached, the holdability of the urine absorbing pad is improved.
Further, since the side absorbers 3a and 3b expand and contract by the absorber gather elastic member 75, the fit around the legs, particularly around the thigh roots, can be improved, and leakage of the portions can be prevented.

  Due to the expansion and contraction of the elastic members 71, 73 and 75, the diaper 10 fits well following the body shape change caused by the wearer's movement or the like, and can effectively prevent side leakage of liquid or the like.

On the abdominal side F and the back side R of the disposable diaper 10, a back side flap portion 17 and an abdominal side flap portion 18, which are laminated with the side sheet 7 and the exterior sheet 8 and project outward in the width direction, are arranged. Yes. A fastening tape 19 is provided on the back flap portion 17. The fastening tape 19 is preferably a hook tape, and may be an adhesive type. Or the thing which combined the hook material and the adhesive tape may be sufficient. The fastening tape 19 can be attached to a tape applying part 20 provided on the ventral flap part 18 to attach and fix the diaper. The tape applying part 20 is preferably a loop tape, and for example, a breathable nonwoven fabric type is preferable in order to prevent stuffiness. Alternatively, a film type or a laminate of a fabric and a film may be used.
When the disposable diaper 10 is mounted and fixed by the fastening tape 19 and the tape applying part 20, the center of the diaper in the longitudinal direction is gently bent inward so that the absorbent body 3 is mounted along the lower abdomen from the wearer's buttocks. As a result, excreta is absorbed and held in the absorber 3 accurately. In the disposable diaper 10 of this embodiment, you may provide a functional structural member, a sheet | seat member, etc. further.

Although not shown, an elastic member or a barrier sheet different from the above may be disposed on the waist part of the diaper.
Further, the top sheet 1 and the back sheet 2 may be provided with design printing indicating the amount of absorption and size of the liquid, a mark serving as a mark for alignment, and the like.

Next, the inclusion form of the intermediate sheet is based on the arrangement of the intermediate sheet 5 shown in FIG. 1 and FIG. An example of a preferable form as an inclusion form of the absorber by the intermediate sheet is shown in FIG.
As shown in FIG.5 (b), as shown in FIG.5 (b), the absorber 3 is the 1st absorber 31 containing the side part absorbers 3a and 3b, and the 2nd absorption containing the center part absorber 3c. It consists of a body 32. Spacing portions 4a and 4b are provided between the side absorbent bodies 3a and 3b and the central absorbent body 3c. The intermediate sheet 5 (first intermediate sheet 5a) is arranged between the first absorbent body 31 and the second absorbent body 32 arranged in this way, and the second intermediate sheet 5b is arranged so as to wrap the second absorbent body 32. The third intermediate sheet 5c is disposed between the first sheet 5a and the top sheet 1. The first intermediate sheet 5a and the third intermediate sheet 5c are overlapped in the opening 33, and are overlapped on the outer side in the width direction of the side absorbent bodies 3a and 3b.
Although not shown, the intermediate sheet 5 (first intermediate sheet 5 a) is disposed between the first absorbent body 31 and the second absorbent body 32, and the second sheet is disposed between the second absorbent body 32 and the back sheet 3. The intermediate sheet 5b may be disposed, and the third intermediate sheet 5c may be disposed between the first intermediate sheet 5a and the top sheet 1. The first intermediate sheet 5a and the third intermediate sheet 5c are overlapped in the opening 33, and are overlapped on the outer side in the width direction of the side absorbent bodies 3a and 3b.

  In this embodiment, unless otherwise specified, the surface that contacts the human body is referred to as the skin side surface or skin contact surface or surface, and the opposite surface is referred to as the non-skin surface or non-skin contact surface or back surface. . Of these two surfaces, the side closer to the skin side or the extending direction is called the skin surface side, the skin contact surface side or the surface side, and the side closer to the non-skin surface or the extending direction is the non-skin side, non-skin It is called the contact side or back side. The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. The normal direction of the front or back surface of the absorbent article is called the thickness direction, and the amount is called thickness. Furthermore, unless otherwise specified, a direction from the abdominal side F to the back side R across the crotch C in the plan view of the absorbent article is referred to as a vertical direction or a longitudinal direction (Y direction), and this longitudinal (longitudinal) direction. The direction orthogonal to the width direction is referred to as the width direction (X direction). The vertical direction typically coincides with the front-rear direction of the human body when worn.

  Below, the preferable structural material of the member which comprises the disposable diaper 10 of this embodiment is demonstrated.

As a forming material of the surface sheet 1, the back sheet 2, and the side sheet 7, those normally used for absorbent articles can be used.
The surface sheet 1 is preferably a hydrophilic non-woven fabric, and is a non-woven fabric called an air-through non-woven fabric, a point-bonded non-woven fabric, a spun-bonded non-woven fabric, a spunlace non-woven fabric or a three-dimensional shaped non-woven fabric. Fibers that have been hydrophilized with polyethylene composite fibers, polyethylene terephthalate and polyethylene composite fibers, etc. are preferred, and the basis weight thereof is 13 g / m ² or more, preferably 15 g / m ² or more from the viewpoint of strength and texture. More preferably, it is 18 g / m ² or more, and from the viewpoint of improving the liquid permeability of excreted urine and preventing liquid residue, it is 60 g / m ² or less, preferably 50 g / m ² or less, more preferably 40 g / m ^2. It is as follows. Then, 13 g / ^{m 2} or more 60 g / ^{m 2} or less, preferably 15 g / ^{m 2} or more 50 g / ^{m 2} or less, more preferably 18 g / ^{m 2} or more 40 g / ^{m 2} or less that can be suitably used. Further, a hydrophilic perforated film or a hydrophilic nonwoven fabric may be partially overlapped on the crotch portion of the topsheet 1 on the non-skin surface side of the topsheet 1.

  The material for forming the back sheet 2 is not particularly limited as long as it is waterproof and moisture permeable. For example, a hydrophobic inorganic resin and a minute inorganic filler made of calcium carbonate or the like, or an incompatible organic material. Examples thereof include a porous film obtained by melt-kneading a polymer or the like to form a film, and uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high-density to low-density polyethylene, linear low-density polyethylene, polypropylene, polybutene, and the like, and these can be used alone or in combination.

  As the absorbent body 3, those normally used for absorbent articles can be used as long as they have liquid retention. For example, a fiber assembly or a combination of this and a water-absorbing polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used. Examples of the pulp fiber include wood pulp such as softwood kraft pulp and hardwood kraft pulp, and natural cellulose fiber such as non-wood pulp such as cotton pulp and straw pulp. In addition, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, single fibers made of synthetic resins such as polyvinyl alcohol resins, composite fibers containing two or more of these resins, semi-synthetic materials such as acetate and rayon Fibers may be included in part. The basis weight is not particularly limited, but is as described above. As the water-absorbing polymer, various polymer materials usually used for this type of article can be used. The water-absorbing polymer is preferably a superabsorbent polymer compound capable of absorbing and retaining 20 times or more of its own weight of water or physiological saline.

  The intermediate sheet 5 is a hydrophilic member. For example, a thin paper (thin paper) such as hydrophilic tissue paper, a non-woven fabric made of hydrophilic fibers such as cotton or rayon, and synthetic resin fibers are subjected to a hydrophilization treatment. A non-woven fabric (spunbond-meltblown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown-spunbond (SSMS), etc.) Can do.

The side sheet 7 is preferably a water-repellent non-woven fabric, and is water-repellent from among non-woven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, heat roll nonwoven fabrics, needle punched nonwoven fabrics manufactured by the card method. Various non-woven fabrics treated with water can be used. Particularly preferred are, for example, spunbond nonwovens, spunbond-meltblown (SM) nonwovens, spunbond-meltblown-spunbond (SMS), spunbond-meltblown-meltblown-spunbond (SMMS), spunbond-spunbond-meltblown -Spunbond (SSMS) nonwoven fabric or the like is used.
Further, an elastic member 71 disposed on the side seat 7, an elastic member 73 constituting a leg gather, an elastic member 75 constituting an absorber gather, an elastic member (not shown) constituting a waist gather, and the like are included in this type of article. Usable ordinary elastic members can be used. Examples of the material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, and the like. The cross section may be a thread shape or string shape (flat rubber or the like) such as a rectangle, square, circle, or polygon, or a multifilament type thread shape. Specifically, the rubber thread having the fineness as described above is used.

  As shown in FIG. 6, the disposable diaper 10 of the present embodiment can be used with a urine absorbing pad 100 disposed as an absorbent pad therein. The urine absorbing pad 100 includes a first sheet 101 disposed on the skin contact surface side, a second sheet 102 disposed on the non-skin contact surface side, and a liquid retaining property disposed between the two sheets. A storage layer 103 is provided. In the drawing, the first sheet 101 and the second sheet 102 are drawn in a plan view. Further, a three-dimensional leak-proof cuff 111 may be provided on the skin surface side of the first sheet 101.

  The first sheet 101 of the urine picking pad 100 can use the same member as the top sheet 1 of the disposable diaper 10, and the second sheet 102 of the urine picking pad 100 uses the same member as the back sheet 2 of the disposable diaper 10. be able to. In addition, the second sheet 102 of the urine absorbing pad 100 may be a liquid-permeable member as used for the top sheet 1. Moreover, the storage layer 103 can use the absorber material similar to the absorber 3 of the disposable diaper 10. FIG. As the three-dimensional leak-proof cuff 111 of the urine picking pad 100, the same member as the three-dimensional gather 41 of the disposable diaper 10 can be used with the same configuration.

Next, an example of the wearing method of the disposable diaper described in the above embodiment will be described with reference to FIG.
As shown in FIG. 7 (a), the disposable diaper 10 is placed in a position where the crotch part C corresponds to the absorbent body 3 when the wearer 200 is placed on its back with the wearer 200 in the lateral position. And spread the skin contact surface side up. At this time, considering the positions of the vertices T1 and T2 arranged on the back side of the opening 33 and the positions of the vertices T1 and T2 (not shown) arranged on the abdominal side (not shown). The position of the disposable diaper 10 is adjusted with respect to the wearer 200.
Subsequently, as shown in FIG. 7B, the disposable diaper 10 is disposed at a predetermined position with the skin contact surface side of the urine removing pad 100 facing upward. At this time, the positions of the vertices T1 and T2 arranged on the back side of the opening 33 of the diaper are measured, and alignment is performed at one end side 100a in the longitudinal direction of the urine collecting pad 100. At the same time, taking into account the distance between the positions of vertices T1 and T2 (not shown) arranged on the ventral side (not shown) of the opening 33 and the other end in the longitudinal direction of the urine removing pad, the urine removing pad Adjust the position of 100. Further, since the position of each vertex T1 is arranged at the center of the article, the position of the urine removing pad 100 in the article width direction is adjusted to complete the alignment.

Next, as shown in FIG.7 (c), it mounts on the disposable diaper 10 which has arranged the urine picking pad 100 so that the wearer 200 may turn on its back so that it rolls about 1/4 turn from the lateral position. . Subsequently, the urine collecting pad 100 is rotated from the back side portion of the wearer 200 to the ventral side portion F so as to cover the crotch portion C of the wearer 200 in the supine state.
Furthermore, as shown in FIG.7 (d), the urine picking pad 100 which distribute | arranged the stomach side part F of the disposable diaper 10 to the crotch part C of the wearer 200 in the supine state (refer FIG.7 (b), (c)). The disposable diaper 10 covers the abdominal side F through the crotch C from the back side of the wearer 200 so as to cover the abdomen. At this time, the center of the diaper in the longitudinal direction is gently bent inward, and the absorbent body 3 is worn so as to extend from the buttocks of the wearer 200 to the lower abdomen. As a result, excreta is absorbed and held in the absorber 3 accurately.
Finally, as shown in FIG. 7 (e), the fastening tape 19 is engaged with the tape applying portion 20 to complete the mounting of the disposable diaper 10.

  In the disposable diaper 10 as the absorbent article, the alignment when the urine removing pad 100 is used in combination is the apex T (T1) in the convex shape projecting inside the opening 33 in the plan view and the concave recessed outward. Since there are two or more of the vertices T (T2) existing in the shape, it is easy to align the urine collecting at the vertex T in the article longitudinal direction of the pad 11, and among the two or more vertices T1, T2. Since one vertex T1 coincides with the center in the width direction of the article, an excellent effect is obtained in that it is easy to align the pad 11 in the article width direction with respect to the urine collection at the vertex T1 arranged in the center.

Moreover, since the apex T can be used as a positioning mark, it is easy to align the disposable diaper 10 with the wearer 200. Similarly, the urine collecting pad 100 can be easily aligned with the disposable diaper 10.
Furthermore, when exchanging the urine removing pad 100, especially when changing pads of different sizes (for daytime, nighttime, etc.) at different times, the point of changing the diaper is the point of the diaper replacement at the time of replacement. . Even in such a case, since the apex T is arranged at the front and rear ends of the opening 33, it is possible to easily align the urine collecting pads 100 having different lengths for night and day. For the alignment of the urine absorbing pads 100 having different lengths, the length in the longitudinal direction of the convex shape or the concave shape arranged at the front and rear ends of the opening 33 can be used.
Furthermore, by matching the product folding position of the urine picking pad 100 with the width of the opening 33, the urine picking pad 100 can be more easily attached.
In this way, it is possible to eliminate the difficulty of positioning the tape stopper and determining the position of the urine collecting pad 100 to be used together, which is caused when the wearer 200 is often in the lateral position. As described above, since the urine absorbing pad 50 can be mounted at a normal position, it is possible to eliminate a sense of incongruity and leakage during mounting.

  Further, in the configuration in which the low-thickness portion 35 is colored or the configuration in which the intermediate sheet 5 disposed between the first absorbent body 31 and the second absorbent body 32 is colored, the shape of the opening 33 can be seen. Since it becomes easy, the position of the opening part 33 becomes clear, and positioning work becomes still easier.

As described above, when the disposable diaper 10 as the absorbent article is worn on the wearer 200, the disposable diaper 10 can be positioned from the skin contact surface side (surface sheet side) of the diaper. For this reason, since the mounting operation can be performed while visually recognizing the position of the diaper and the position of the wearer, the positional relationship does not become difficult to understand, and it is possible to prevent the front and back of the diaper from being displaced.
In particular, when the urine absorbing pad 100 is used in combination with the tape-fastening diaper 10, the urine collecting pad 100 can be easily positioned using the apex attached to the tape stopper.

Furthermore, since the disposable diaper 10 described with reference to FIG. 2 has gaps due to the separating portions 4a and 4b between the side absorbent bodies 3a and 3b arranged on both sides of the central absorbent body 3c, The side absorbent bodies 3a and 3b are easily deformed, and the leg gathers and absorbent gathers improve the fit around the crotch, particularly around the thigh base. Moreover, in the crotch part, since there is a gap due to the separation portion 4 extending in the longitudinal direction, the flexibility is improved.
Furthermore, by arranging the intermediate sheet 5 between the side absorbent bodies 3a and 3b and the central absorbent body 3c, the side absorbent bodies 3a and 3b in the crotch part are easily deformed and followability is improved. Therefore, twisting of the absorber can be prevented.
After the absorbent 3 absorbs the body fluid, a groove is formed by swelling of the side absorbent bodies 3a and 3b and the central absorbent body 3c. That is, when the side part absorbers 3a and 3b and the central part absorber 3c absorb urine, each expands in the thickness direction. As a result, the separation portion 4 which is a gap in the width direction becomes a valley, and a groove is formed. If the absorbent body 3 urinates for the second time, the liquid is more likely to flow in the front-rear direction due to the groove formed by the swollen absorbent body 3, which leads to prevention of crotch leakage.

  In the absorbent article of the present invention, the shape of the absorbent body 3 is not particularly limited, and the surface may be a block shape or provided with a slit.

  The following additional notes (absorbent articles) are further disclosed with respect to the above-described embodiment and the like.

<1>
An absorbent article that can be used with a separate pad inside,
It has an absorbent body sandwiched between a front sheet, a back sheet, and both sheets,
The absorber has an opening on the skin contact surface side, and has a step portion between the inside and the outside of the opening,
At least one of the front and rear end portions in the longitudinal direction of the stepped portion has two or more vertices in plan view,
An absorbent article in which one of the two or more vertices coincides with the center in the width direction.
<2>
The absorbent article according to <1>, wherein the opening penetrates in a thickness direction of an absorbent body disposed on the skin contact surface side.
<3>
The absorbent article according to <1> or <2>, wherein the opening is axisymmetric with respect to the center line in the width direction and has a pair of vertices separately from the vertices existing at the front and rear end portions of the opening. .
<4>
The absorbent article according to any one of <1> to <3>, wherein the absorber on both sides of the opening in the article width direction has a shape projecting toward the opening.
<5>
The absorbent article according to any one of <1> to <3>, wherein the absorbent bodies on both sides of the opening in the article width direction have a shape that is recessed outward in the width direction from the opening.
<6>
The absorbent article according to any one of <1> to <5>, wherein the front and rear end portions each have two or more vertices.
<7>
The absorbent article according to any one of <1> to <6>, wherein the apex is configured by a convex shape or a concave shape formed of a curved surface.
<8>
The absorptive article according to <7>, wherein a locus radius (curvature radius) in plan view of the convex shape or the concave shape is 10 mm or more, preferably 20 mm or more, more preferably 25 mm or more.
<9>
The absorptive article according to <7> or <8>, wherein a locus radius (curvature radius) in plan view of the convex shape or the concave shape is preferably 60 mm or less, and more preferably 55 mm or less.
<10>
Each of the lengths in the longitudinal direction of the convex and concave articles on the rear side of the absorbent article is 10 mm or more, preferably 20 mm or more, more preferably 25 mm or more, any one of <7> to <9> Or an absorbent article according to claim 1.
<11>
The two vertices that coincide with the center in the width direction are each a part of an arc and are convex inward in the longitudinal direction of the opening, and the curvature of the arc including one apex includes the other apex. The absorbent article according to any one of <6> to <10>, which is higher than the curvature of the arc.
<12>
The lengths of the convex and concave articles in the longitudinal direction on the rear side of the absorbent article are 120 mm or less, preferably 110 mm or less, more preferably 100 mm or less, any one of <7> to <11> Or an absorbent article according to claim 1.
<13>
The locus radius (curvature radius) of the convex shape on the front side of the absorbent article in a plan view is 50 mm or more, preferably 60 mm or more, more preferably 65 mm or more, and any one of <7> to <12> The absorbent article as described.
<14>
The absorptivity according to any one of <7> to <13>, wherein a locus radius (curvature radius) of the convex shape on the front side of the absorbent article in plan view is preferably 150 mm or less, more preferably 140 mm or less. Goods.
<15>
The absorbent article according to any one of <1> to <14>, wherein a colored intermediate sheet is disposed on the non-skin contact surface side of the absorbent body.
<16>
The absorbent article according to <15>, further including an absorber different from the absorber on the non-skin contact surface side of the colored intermediate sheet.
<17>
A first absorber constituting the absorber having the opening, and a second absorber constituting the another absorber,
The absorbent article according to <16>, wherein the color of the colored intermediate sheet is visible from the outside through the opening.
<18>
The absorbent article according to <17>, wherein the back surface of the intermediate sheet and the second absorbent body are not joined in the vicinity of the crotch side edge of the second absorbent body.
<19>
The two vertices that coincide with the center in the width direction are the above <16> to <16> in which the absorber disposed on the skin contact surface side and the absorber disposed on the non-skin contact surface side overlap. The absorbent article according to any one of 18>.
<20>
The absorbent article according to any one of <16> to <19>, wherein the another absorbent body has a shape curved or bent inward at a crotch part.
<21>
The second absorbent body is constricted in the central portion in the longitudinal direction;
The first absorbent body and the second absorbent body overlap each other at both ends of the opening in the longitudinal direction,
The absorbent article according to any one of <17> to <20>, wherein a width of the second absorbent body is narrower than a width of the opening viewed in plan in the longitudinal center.
<22>
The absorbent article according to any one of <17> to <21>, wherein the first absorbent body and the second absorbent body overlap each other at both ends of the opening in the longitudinal direction of the article.
<23>
The absorbent article according to any one of <17> to <22>, wherein the width of the second absorbent body is narrower than the width of the ventral side portion or the back side portion of the first absorbent body.
<24>
The absorbent article according to any one of <17> to <24>, wherein an elastic member that is stretched and bonded in a longitudinal direction is disposed in a crotch lower center portion of the second absorbent body.
<25>
Any one of the items <1> to <24>, wherein the absorbent body has an outer edge that is curved or bent inward at the crotch portion and spreads outward in at least one of the ventral portion and the dorsal portion. 2. The absorbent article according to 1.
<26>
The pad used in the absorbent article according to any one of <1> to <25> is disposed between the first sheet, the second sheet, and the first sheet and the second sheet. Absorbent pad and absorbent article comprising a storage layer formed.
<27>
The absorbent pad and the absorbent article mounting method according to <26>, wherein the pad is positioned using the apex of the absorbent article according to any one of <1> to <25> as a mark. .
<28>
The pad is positioned using the length in the longitudinal direction of the convex shape or the concave shape arranged at the front and rear ends of the opening of the absorbent article according to any one of <1> to <25>. The absorbent pad and the absorbent article mounting method according to <26> or <27>.
<29>
Any one of <26> to <28>, wherein the pad is positioned using a color visible from the outside through the opening of the absorbent article according to any one of <1> to <25>. 2. The absorbent pad and the method for mounting the absorbent article according to 1.

DESCRIPTION OF SYMBOLS 1 Top sheet 2 Back sheet 3 Absorber 3a, 3b Side part absorber 4, 4a, 4b Separation part 5, 5a, 5b Intermediate sheet 7 Side sheet 8 Exterior sheet 10 Disposable diaper 31 1st absorber 32 2nd absorber 33 Opening 34 Step 35 Low-thickness part 100 Urine collecting pad 200 Wearer T1, T2, T3 vertex

Claims (7)

An absorbent article that can be used with an absorbent pad inside,
It has an absorbent body sandwiched between a front sheet, a back sheet, and both sheets,
The absorbent body has an opening on the skin contact surface side, and has a step portion between the inside and the outside of the opening,
On both the longitudinal front and rear end portions of the opening, the stepped portion has three or more vertices in plan view,
Consistent with one width direction center of the three or more vertices in each of the front and rear ends, the top points that match with the widthwise center is part of a circular arc, respectively, and the opening An absorbent article that is convex inward in the longitudinal direction and has a higher curvature of an arc including the vertex of one end of the front and rear ends than the curvature of an arc including the apex of the other end. An absorbent article that can be used with an absorbent pad inside,
It has an absorbent body sandwiched between a front sheet, a back sheet, and both sheets,
The absorbent body has an opening on the skin contact surface side, and has a step portion between the inside and the outside of the opening,
On both the longitudinal front and rear end portions of the opening, the stepped portion has three or more vertices in plan view,
One of the three or more vertices in each of the front and rear ends coincides with the center in the width direction,
In the front end side and the rear end side of the front and rear end portions, comparing the front end edge and the rear end edge of the opening when viewed from the top from the skin side , one contour does not match the other contour, Absorbent article.   The absorptive article according to claim 1 or 2 in which said opening part has penetrated over the thickness direction of an absorber arranged at said skin contact side.   The absorption according to any one of claims 1 to 3, wherein the opening is axisymmetric with respect to a center line in the width direction and has a pair of apexes separately from apexes existing at front and rear end portions of the opening. Sex goods.   The absorbent article according to any one of claims 1 to 4, wherein a colored intermediate sheet is disposed on the non-skin contact surface side of the absorbent body.   The absorptive article according to claim 5 which has an absorber different from said absorber in the non-skin contact surface side of said colored sheet.   The absorptivity according to claim 6, wherein an apex that coincides with the center in the width direction overlaps an absorber disposed on the skin contact surface side and an absorber disposed on the non-skin contact surface side. Goods.

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