WO2015072218A1 - Pant-type absorbent article - Google Patents

Abstract

The absorbent core (5) comprises at least a first region (41) and a second region (42) with differing basis weights. The first region (41) has a higher basis weight than the second region (42). The first region (41) comprises the crotch section (C) and the second region (42) comprises the back section (B). The first region (41) comprises a group of fold-inducing sections (50) obtained from multiple strip-shaped fold-inducing sections (51, 52a, 52b) that extend in the longitudinal direction. The group of fold-inducing sections (50) is obtained from a central fold-inducing section (51) and a pair of side fold-inducing sections (52a, 52b) located on either side of the central fold-inducing section (51). The group of fold-inducing sections (50) is located closer to the crotch section (C) than the lower edges (31A, 32A) of the outer covering (3) on the abdominal section (A) and said group of fold-inducing sections (50) is absent from the back section (B).

Description

Pants-type absorbent article

The present invention relates to a pants-type absorbent article.

There are known techniques for making the basis weight of the crotch part of the absorbent body of the absorbent article higher than other parts, or forming a bending guide part made of a slit, a groove or the like in the crotch part. For example, in Patent Document 1, the absorbent body has a high basis weight portion at the center in the width direction at the crotch portion, and a low basis weight portion having a lower basis weight than the high basis weight portion on both sides of the high basis weight portion. A pants-type disposable diaper having the following is described. The high basis weight part has a central bending induction part consisting of a slit, a groove or a non-stacking fiber part extending in the longitudinal direction of the absorbent body, and the low basis weight part is a side part bending induction part consisting of a non-stacking fiber part. have. On the ventral side in the longitudinal direction of the absorbent body, the central bending guide part extends from the end position of the side bending guide part. On the other hand, on the dorsal side in the longitudinal direction of the absorber, the side bending guide part extends from the end position of the central bending guide part.

Patent Document 2 describes an absorbent article having a main body absorber on the back sheet side and having an absorber having a top sheet side medium-high absorber. The middle / high absorber is disposed in a region facing the excretion portion of the wearer, and the width thereof is narrower than that of the main body absorber. The medium-high absorbent body has a large number of block-like absorbent parts, and is regularly spaced from each other. The middle-high absorbent body has a groove-shaped portion regularly formed in the longitudinal direction and the width direction between adjacent block-shaped absorbent portions.

JP 2012-016435 A JP 2012-125366 A

By the way, the absorbent body is often composed of a mixed fiber of hydrophilic fibers such as pulp and water-absorbing polymer particles. When the absorbent body having such a structure absorbs liquid, As a result, the water-absorbing polymer swells, and as a result, the absorbent body also swells. In particular, in the high basis weight part, the degree of swelling becomes remarkable as compared with the low basis weight part. Moreover, when the bending guide part is formed in the absorber, the bending guide part acts as a starting point of deformation, and the deformation due to swelling is easily promoted. The swelled and deformed absorbent body compresses the wearer's body to reduce the wearing feeling, inhibits the stretchability of the stretchable gathers arranged in the absorbent article, or causes liquid leakage. Sometimes. Therefore, it is necessary to determine the formation position of the high basis weight portion and the formation position of the bending guide portion in the absorbent body so as not to cause these disadvantages. However, in the techniques described in the above-described patent documents, it may not be said that the formation position of the high basis weight portion or the formation position of the bending guide portion should be satisfied.

The present invention comprises a vertically long absorbent main body including an absorbent core, and an exterior body that is disposed on the non-skin-facing surface side of the absorbent main body and is fixed to the absorbent main body. An exterior body ventral region located on the stomach side of the exterior body and the back side of the exterior body A pants-type absorbent article in which both side edge portions along the main body longitudinal direction of each exterior body back side region located in the section are joined to each other to form a waist opening and a pair of leg openings.
The absorptive core has at least a first region and a second region having different basis weights, and the first region has a basis weight higher than that of the second region.
The first region includes at least a crotch portion, and the second region includes at least a dorsal side portion.
The first region has a bending guide portion group including a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
The bending guide part group is composed of a central bending guide part located in the central region in the width direction of the absorbent core and a pair of side bending guide parts located on both sides of the central bending guide part.
The bending guide part group is located closer to the crotch part than the lower end part of the exterior body located on the abdominal side part, and the bending guide part group is not present on the back side part.

The present invention also includes a vertically long absorbent main body including an absorbent core, and an exterior body disposed on the non-skin-facing surface side of the absorbent main body and fixed to the absorbent main body. An exterior body ventral region located on the abdominal side of the exterior body and the back A pants-type absorbent article in which both side edges along the longitudinal direction of the main body of the exterior body dorsal region located on the side are joined together to form a waist opening and a pair of leg openings,
The absorbent core has at least a first region and a second region having different basis weights, and the first region has a higher basis weight than the second region,
The first region provides at least a crotch portion, and the second region provides a pants-type absorbent article including at least a ventral portion and a dorsal portion.
The first region has a bending guide portion group including a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
The bending guide part group is composed of a central bending guide part located in the central region in the width direction of the absorbent core and a pair of side bending guide parts located on both sides of the central bending guide part.
The bending guide part group is located closer to the crotch part than the lower end part of the exterior body located on the abdominal side part, and the bending guide part group is not present on the back side part.

FIG. 1 is a perspective view showing an example of a pants-type disposable diaper that is an embodiment of a pants-type absorbent article of the present invention. FIG. 2 is a plan view on the skin contact surface side (surface sheet side) showing a developed state in which the diaper shown in FIG. FIG. 3 is an exploded perspective view of the diaper shown in FIG. FIG. 4 is a cross-sectional view schematically showing a cross section taken along the line II of FIG. 5 (a) is a plan view of the absorbent core in the diaper shown in FIG. 1, and FIG. 5 (b) is a cross-sectional view taken along the line bb in FIG. 5 (a). 6 (a) is a plan view of another form of the absorbent core, and FIGS. 6 (b), 6 (c), and 6 (d) show the bb line in FIG. 6 (a), It is a cc line and dd line sectional view. FIG. 7A is a plan view of still another form of the absorbent core, and FIG. 7B is a cross-sectional view taken along the line bb in FIG. 7A. FIG. 8 is a perspective view showing another embodiment of the pant-type absorbent article of the present invention. FIG. 9 is a plan view of the underpants-type disposable diaper shown in FIG. FIG. 10 is an enlarged plan view of a back side region of the pants-type disposable diaper shown in FIG. 9. FIG. 11 is an enlarged plan view of the ventral region of the pants-type disposable diaper shown in FIG. 9. 12 is a cross-sectional view taken along the line II of FIG. FIG. 13 is a plan view on the skin contact surface side (surface sheet side) showing a developed state in which another embodiment of the pant-type absorbent article of the present invention is expanded in a flat shape by extending the elastic member of each part. is there.

Detailed Description of the Invention

Hereinafter, the pants-type absorbent article of the present invention will be described with reference to the drawings based on a pants-type disposable diaper which is a preferred embodiment thereof. The pants-type disposable diaper 1 of the present embodiment is arranged on a vertically long absorbent main body 2 including an absorbent core 5 and a non-skin facing surface side of the absorbent main body 2 as shown in FIGS. 1 to 3. An exterior body 3 that fixes the absorbent main body 2, and is positioned between the abdominal side A disposed on the abdomen side of the wearer and the back side B disposed on the back side when worn, and between them. An exterior body ventral region (belt side sheet member 31 to be described later) and a back side portion having a crotch portion C arranged in the crotch portion of the wearer in the longitudinal direction X of the body and located on the abdominal side portion A of the exterior body 3 A pair of side seal portions S, S and a waist opening WO are formed by joining the side edge portions 3s, 3s along the main body longitudinal direction X of the exterior body back side region (back side seat member 32 described later) located in B. And a pair of leg openings LO, LO are formed.

In the present specification, the skin facing surface is a surface that faces the wearer's skin when worn on a pants-type absorbent article and its constituent members (for example, an absorbent main body, an absorbent core), and is a non-skin facing surface. Is a surface directed to the side opposite to the skin side of the wearer (clothing side such as shorts) when worn on the pant-type absorbent article and its constituent members. Moreover, the main body longitudinal direction is the longitudinal direction of the vertically long absorbent main body, and the main body width direction is a direction orthogonal to the main body longitudinal direction.

The absorbent main body 2 includes a liquid-permeable surface sheet 21 that forms the skin-facing surface of the absorbent main body 2, and a liquid-impermeable or liquid-impermeable back surface that forms the non-skin-facing surface of the absorbent main body 2. The sheet 22 and the liquid-retaining absorbent 23 disposed between the sheets 21 and 22 are included, and are formed in a rectangular shape that is long in the X direction.

The absorbent body 23 is configured to include an absorbent core 5 mainly composed of a pile of hydrophilic fibers such as pulp fibers, and a core wrap sheet (not shown) that covers the absorbent core 5. . The absorbent core 5 contains water-absorbing polymer particles as necessary. When the absorbent core 5 contains water-absorbing polymer particles, hydrophilic fibers such as pulp fibers and water-absorbing polymer particles can be used as a mixed product. Alternatively, the water-absorbing polymer particles can also be arranged in a layer form at any part of the pile of hydrophilic fibers such as pulp fibers.

The top sheet 21, the back sheet 22, and the absorber 23 are all rectangular shapes that are long in the X direction, and the top sheet 21 and the back sheet 22 are outward in the longitudinal direction X from both ends in the longitudinal direction X of the absorber 23. The absorbent main body 2 having a rectangular shape that is long in the X direction is joined at the portion extending in the X direction.

As shown in FIGS. 2 and 4, the absorbent main body 2 is provided with a pair of three-dimensional gathers 4 and 4 along the main body longitudinal direction X on the left and right sides along the main body longitudinal direction X on the skin facing surface. ing. Each three-dimensional gather 4 stands up toward the wearer's skin side at least in the crotch C when worn. Each three-dimensional gather 4 includes a liquid-resistant or water-repellent three-dimensional gather forming sheet material 41 and a three-dimensional gather forming elastic member 42 fixed to the sheet material 41. The sheet material 41 is formed from a single belt-like sheet, and one end portion of the sheet material 41 in the main body width direction Y is disposed between the absorbent body 23 and the back sheet 22 of the absorbent main body 2 and bonded. It is fixed by an agent (not shown). On the other hand, the other end of the sheet material 41 in the main body width direction Y is folded outwardly in the main body width direction Y by a folding line (not shown) extending in the main body longitudinal direction X above the absorber 23. The elastic member 42 is fixed via an adhesive in a state where the elastic member 42 extends in the main body longitudinal direction X between the sheets opposed to each other by the folding, so that the three-dimensional gather 4 is formed.

The exterior body 3 is configured to include sheet materials 35 and 36 and a plurality of exterior body forming elastic members 33 fixed to the sheet materials 35 and 36. As shown in FIGS. 1 to 3, the exterior body 3 in the present embodiment includes an abdominal sheet member 31 disposed on the abdomen side of the wearer when worn. Moreover, the exterior body 3 contains the back side sheet | seat member 32 distribute | arranged to a wearer's back side at the time of wear. Both sheet members 31 and 32 are divided with the crotch part C interposed therebetween. The ventral sheet member 31 and the back sheet member 32 have the same length along the longitudinal direction X and the width direction Y. Further, with respect to the back sheet member 32, a rear body extension region 32E extending further downward in the longitudinal direction from the lower end 32A in the longitudinal direction of the back sheet member 32 is continuously provided. That is, a boundary portion between the back side seat member 32 and the back body extension region 32 </ b> E becomes the lower end portion 32 </ b> A of the back side seat member 32. In the following description, the member composed of the back seat member 32 and the rear body extension region 32E is also referred to as “rear body member 32F”.

The pants-type disposable diaper 1 of the present embodiment includes an abdominal sheet member 31 (exterior body ventral region) disposed on the wearer's ventral side and a back sheet member 32 (exterior) disposed on the wearer's dorsal side. Body side area) and a longitudinally long absorbent main body 2 that is fixed over both the sheet members 31 and 32, and both side edges 3s and 3s along the longitudinal direction X of the main body of each of the sheet members 31 and 32. A pair of side seal portions S, S, a waist opening WO, and a pair of leg openings LO, LO are formed by joining together. In the side seal portion S, the ventral sheet member 31 and the dorsal sheet member 32 are joined by a known joining means such as an adhesive, a heat seal, a high frequency seal, and an ultrasonic seal.

When the pair of side seal portions S, S are formed by joining the side edge portions 3s, 3s of the ventral sheet member 31 and the dorsal seat member 32, the outer side end in the longitudinal direction of the ventral sheet member 31 is used. The positions of the edge 31 ′ and the outer side edge 32 ′ in the longitudinal direction of the back sheet member 32 are matched to join the side edges 3 s and 3 s of the sheet members 31 and 32 together. When the side edge portions 3 s and 3 s of both the seat members 31 and 32 are joined together in this way, the position of the lower end portion 31 </ b> A along the longitudinal direction X of the abdominal sheet member 31 and the longitudinal direction X of the back seat member 32. The position of the lower end portion 32A is aligned. Further, from the lower end portions 31A, 32A of these sheet members 31, 32, in other words, from the lower end of the side seal portion 4, a rear body extending area 32E hangs downward. As described above, the positions of the lower end portions 31 </ b> A and 32 </ b> A of the ventral side seat member 31 and the back side seat member 32 coincide with the positions of the lower end portions of the side seal portion 4. That is, the lower end portions 31A and 32A of the abdominal sheet member 31 and the back sheet member 32 are joined to each other by joining the side edge portions 3s and 3s along the main body longitudinal direction X of the both sheet members 31 and 32 to each other. It is the position of the lower end of the side seal portion S when the seal portions S, S are formed. In the present invention, a line connecting the left and right lower end portions 31A of the ventral side sheet member 31 is defined as a boundary portion between the ventral side portion A and the crotch portion C. Further, a line connecting the left and right lower end portions 32A of the back side seat member 32 is defined as a boundary portion between the back side portion B and the crotch portion C. Therefore, the back body extension area 32E of the back body member 32F is located in the crotch part C.

The abdominal sheet member 31 and the back body member 32F are respectively an outer layer sheet material 35 that forms a non-skin facing surface (the outer surface of the diaper 1), and an inner layer sheet material 36 that is disposed on the inner surface side of the outer layer sheet material 35. And a plurality of thread-like or belt-like elastic members 33 fixed between the sheet members 35 and 36 by an adhesive (not shown), and the unfolded state of the diaper 1 as shown in FIG. In FIG. 1, the rectangular shape is long in the body width direction Y. The two sheet members 35 and 36 are joined to each other at a predetermined portion by an adhesive (not shown). In the ventral sheet member 31 and the back body member 32F, as shown in FIG. 2, the plurality of elastic members 33 are arranged substantially linearly along the main body width direction Y and extend in the main body width direction Y. In the state, they are arranged at a predetermined interval in the longitudinal direction X of the main body.

As shown in FIG. 3, the outer layer sheet material 35 has the same length in the main body width direction Y as that of the inner layer sheet material 36, but the length in the main body length direction X is longer than that of the inner layer sheet material 36. . As a result, the outer layer sheet material 35 has an extending portion 35 </ b> E that extends outward from the outer end 36 a in the main body longitudinal direction X of the inner layer sheet material 36. As shown in FIG. 2, the extended portion 35E of the outer layer sheet material 35 of the abdominal sheet member 31 and the back body member 32F is folded back toward the inner layer sheet material 36, and the sheet 35 (35E) facing each other by the folded back. ), 36, the end of the main body longitudinal direction X of the absorbent main body 2 is disposed. The sheets 35 (35E) and 36 facing each other are joined to each other by an adhesive (not shown) at a predetermined portion.

The elastic member 33 extends between the outer layer sheet material 35 and the inner layer sheet material 36 at the waist portion D in each of the ventral side portion A (belt side seat member 31) and the back side portion B (back side seat member 32). The waist gathers are formed by being fixed by. As shown in FIG. 3, the elastic member 33 of the waist part D of the ventral part A and the elastic member 33 of the waist part D of the back part B are the full length of the body width direction Y of the ventral part A or the back part B, as shown in FIG. It is possible to express the inherent stretchability throughout. The waist part D is a part located around the waist of the wearer. Usually, the outer end 1a of the body longitudinal direction X in the abdominal side A of the diaper 1 and the body longitudinal direction X of the back side B of the diaper 1 are arranged. This is a region from each outer end 1b to a length of 1 to 15% of the total length of the diaper 1 in the longitudinal direction X of the main body.

In addition, an elastic member 34 is provided between the outer layer sheet material 35 and the inner layer sheet material 36 at the waist portion E in each of the ventral side portion A (belt side seat member 31) and the back side portion B (back side seat member 32). By being fixed in the extended state, a waistline gather is formed. As shown in FIG. 2, the waistline E of the abdominal side A has the diaper 1 in an expanded state in which the elastic members of the respective parts are extended to expand in a plane, the abdominal side A is the upper side, and the back side B is When considered as the lower side, it is an area located below the waist part D and above the crotch part C. The waistline portion E of the back side portion B is a region located below the waist portion D and above the back side extension region 32E when the diaper 1 is turned upside down from that shown in FIG. It is. Further, in the rear body extension region 32E that is a member located in the crotch part C, the extension region elastic member 37 is fixed in an extended state between the outer layer sheet material 35 and the inner layer sheet material 36. An extension part gather is formed.

In the ventral side A (belt side sheet member 31), the back side B (back side sheet member 32), and the back body extension area 32E, the elastic member 34 and the extension area elastic member 37 of the waistline E are illustrated. As shown in FIG. 3, it is not arranged in the part which overlaps with the absorptive main body 2 (absorbent core 5). Therefore, in the waist part E and the back body extension area 32E of the abdominal part A and the back part B, a pair of waist gathers is provided on the left and right side parts along the longitudinal direction X of the main body excluding the region where the absorbent main body 2 is disposed. And the extension area gathers are formed. Instead of such an arrangement form of the elastic members 34 and 37, the elastic members 34 and 37 extend over the entire region in the body width direction Y of the abdominal side A and the back side B so that the elastic members 34 and 37 overlap the absorbent main body 2. 34 and 37 may be disposed, and a process for suppressing the stretchability of the elastic members 34 and 37 may be performed at a portion where the elastic members 34 and 37 overlap the absorbent main body 2. As such a process, for example, a method of finely cutting the elastic members 34 and 37 after the elastic members 34 and 37 are arranged in the abdominal sheet member 31, the back sheet member 32, and the rear body extension region 32E can be cited. Or the method of restrict | limiting so that the elastic members 34 and 37 may not expand-contract by joining using an adhesive agent etc. is mentioned. By these processes, the elastic members 34 and 37 do not expand and contract at the portion where the elastic members 34 and 37 overlap the absorbent main body 2, but other portions (in the main body width direction Y of the absorbent main body 2) other than the portion. Expansion and contraction is maintained in the portion located outside.

As described above, the elastic members 34 and 37 arranged in the waistline portion E and the back body extension region 32E are suppressed by the stretchability at the portion overlapping the absorbent main body 2 (absorbent core 5). The end of the absorbent main body 2 in the main body longitudinal direction X can be made to follow the wearer's body without causing vertical wrinkles in the sex main body 2, thereby effectively preventing liquid leakage. At the same time, inconveniences such as a mark due to the top of the wrinkles generated in the absorbent main body 2 hitting the skin are effectively prevented.

FIG. 5 shows the absorbent core 5 provided in the pants-type disposable diaper 1 of the present embodiment. The absorbent core 5 has an abdominal side A, a back side B, and a crotch C corresponding to the diaper 1. The ventral portion A is a region where the absorbent core 5 overlaps the ventral sheet member 31. The back part B is an area where the back sheet member 32 and the absorbent core 5 overlap in the back body member 32F. The crotch portion C is a region between the lower end portion 31 </ b> A of the ventral side sheet member 31 and the lower end portion 32 </ b> A of the back side seat member 32. The crotch part C includes a back body extension region 32E of the back body member 32F.

The absorbent core 5 has two regions, a first region 41 and a second region 42 having different basis weights. The first region 41 includes at least the crotch part C, and further includes at least the ventral part A. On the other hand, the second region 42 includes at least the back side portion B. “The first region 41 includes at least the crotch portion C” means that the first region 41 includes the crotch portion C and may further include another region, for example, the back side portion B. Further, “the second region 42 includes at least the back side portion B” means that the second region 42 includes the back side portion B and may further include other regions such as the crotch portion C. To do.

The absorbent core 5 has a vertically long and substantially rectangular shape in plan view. The longitudinal direction of the absorbent core 5 coincides with the body longitudinal direction X. When the absorbent core 5 is viewed along the main body longitudinal direction X, the first region 41 has a higher basis weight than the second region 42. When viewed along the main body width direction Y, the basis weight of the first region 41 is the same in any part (except for the bending guidance group described later). Similarly, when viewed along the body width direction Y, the basis weight of the second region 42 is the same in any part.

It is excreted by forming the first area 41 of high basis weight so as to include the crotch C and the abdominal side part A, and forming the second area 42 of low basis weight so as to include the back side part B. When the absorbent core 5 absorbs the liquid and swells, the degree of swelling of the second area 42 having a low basis weight can be suppressed. As a result, the absorbent core 5 can suppress pressure on the waist of the wearer due to swelling. This is particularly advantageous when the wearer is sleeping on his back. In particular, the outer layer extending portion 35E in the sheet material 35 (see FIGS. 2 and 3) is the length along the body longitudinal direction X which constitutes the dorsal sheet member 32 as described above and L _1, also extending portion when the length along the body longitudinal direction X in the region which overlaps with the second region 42 of the 35E was _{L 2,} a ratio of _{L 2} for _{L 1 [L 2 / L 1} ] value of × 100 is 50% or more When it is 100% or less, particularly 60% or more and 100% or less, the second region 42 is more difficult to swell, and it is less likely to cause discomfort when the diaper 1 is worn.

From the viewpoint of making the above advantageous effects more prominent, the basis weight of the first region 41 is preferably 120% or more with respect to the basis weight of the second region 42, and preferably 140% or more. Further preferred. Moreover, it is preferable that it is 250% or less, and it is still more preferable that it is 230% or less. For example, the basis weight of the first region 41 is preferably 120% or more and 250% or less, and more preferably 140% or more and 230% or less with respect to the basis weight of the second region 42.

Similarly, from the viewpoint of making the above advantageous effects more prominent, the length of the first region 41 is preferably 50% or more of the entire length of the absorbent core 5, and preferably 60% or more. More preferably, it is more preferably 70% or more. Further, it is preferably 90% or less, more preferably 85% or less, and further preferably 80% or less. For example, the length of the first region 41 is preferably 50% or more and 90% or less of the total length of the absorbent core 5, more preferably 60% or more and 85% or less, and 70% or more and 80% or less. More preferably. On the other hand, the length of the second region 42 is preferably 10% to 50% of the entire length of the absorbent core 5, more preferably 15% to 40%, and more preferably 20% to 30%. More preferably it is.

The ratio of the basis weight of the first region 41 and the basis weight of the second region 42 is as described above, and the value of the basis weight itself of the second region 42 that is the low basis weight region is 100 g / m ² or more. It is preferably 150 g / m ² or more, and more preferably 200 g / m ² or more. Also it is preferably 600 g / ^{m 2} or less, further preferably 550 g / ^{m 2} or less, and still more preferably 500 g / ^{m 2} or less. For example, the basis weight of the second region 42 is preferably 100 g / m ² or more and 600 g / m ² or less, more preferably 150 g / m ² or more and 550 g / m ² or less, and 200 g / m ² or more and 500 g / m ² or less. More preferably, it is m ² or less. On the other hand, the basis weight of the first region 41, on condition that the ratio of the basis weight and the basis weight of the second region 42 of the first region 41 is within the above range, 150 g / ^{m 2} or more 900 g / ^{m 2} Is preferably 200 g / m ² or more and 850 g / m ² or less, and more preferably 250 g / m ² or more and 800 g / m ² or less.

The magnitude relation of the basic weight of the 1st field 41 mentioned above and the 2nd field 42 is a place where the basic weight measured about the whole absorptive core 5 is compared, pulp fiber etc. which constitute absorptive core 5 The first region 41 is preferably higher than the second region 42 with respect to the basis weight of the hydrophilic fiber and the basis weight of the water-absorbing polymer. That is, it is preferable that the basis weight of the hydrophilic fiber constituting the first region 41 is higher than the basis weight of the hydrophilic fiber constituting the second region 42. Further, the basis weight of the water-absorbing polymer constituting the first region 41 is preferably higher than the basis weight of the water-absorbing polymer constituting the second region 42. Such a basis weight relationship is preferable because it can improve the absorption capacity near the urination point and is effective not only in preventing liquid leakage but also in suppressing gel blocking.

In the first region 41 and the second region 42, a difference in thickness due to a difference in basis weight may or may not occur. A difference in thickness due to a difference in basis weight, that is, whether or not a step is generated between the two regions 41 and 42 is not critical for achieving the advantageous effects of the present invention. It is preferable that the absorptive core 5 is composed of a single structure regardless of whether or not there is a step between the regions 41 and 42. The “single structure” means that the stacked fiber body including hydrophilic fibers such as pulp fibers and water-absorbing polymer particles constituting the absorbent core 5 has a single layer structure. A multi-layer structure in which two or more kinds of laminated fibers are laminated is not included in the single structure according to the present invention. By constituting the absorbent core 5 having the first region 41 and the second region 42 having different basis weights from a single structure, there is no interface between the layers in the absorbent core 5, so in the thickness direction The advantage is that the diffusion of the liquid along the line is performed smoothly. On the other hand, when the absorbent core 5 is composed of a multi-layer structure, the interface between the layers tends to easily inhibit the diffusion of the liquid along the thickness direction. However, in the present invention, it is not hindered that the absorbent core 5 is composed of a multi-layer structure.

The ratio of hydrophilic fibers such as pulp fibers contained in the absorbent core 5 and the water-absorbing polymer is preferably 1: 0.5 or more, expressed as a mass ratio of hydrophilic fiber: water-absorbing polymer. : More preferably 0.8 or more. Moreover, it is preferable that it is 1: 2.5 or less, and it is still more preferable that it is 1: 2 or less. For example, the mass ratio of hydrophilic fiber: water-absorbing polymer is preferably 1: 0.5 or more and 1: 2.5 or less, and more preferably 1: 0.8 or more and 1: 2 or less. In the first region 41 and the second region 42, the ratio between the hydrophilic fiber and the water-absorbing polymer may be the same or different. As in the examples described later, it is preferable that the ratios in both the regions 41 and 42 are different because it is possible to disperse sufficient absorbent polymer in the vicinity of the urination point, which is useful for preventing liquid leakage. In order to make this ratio in both the regions 41 and 42 different, for example, a suction condition when manufacturing the absorbent core 5 using a known fiber stacker may be set appropriately.

As shown in FIG. 5, the first region 41 has a bending guide section group 50 including a plurality of bending guide sections 51, 52 a, 52 b extending in the main body longitudinal direction X. The bending guide portion group 50 includes a central bending guide portion 51 located in the central region in the body width direction Y, and a pair of side bending guide portions 52a and 52b located on both sides of the central bending guide portion 51. Consists of. The central bending guiding portion 51 is located in the central area of the absorbent core 5 in the main body width direction Y and is located in the central area of the diaper 1 in the main body width direction Y. Each of the side bending guide portions 52 a and 52 b extends in parallel with the central bending guide portion 51. Further, the distances between the side bending guide portions 52a and 52b and the central bending guide portion 51 are the same. Therefore, each side part bending | flexion induction | guidance | derivation part 52a, 52b is formed in the symmetrical position with respect to the vertical centerline (not shown) extended in the main body longitudinal direction X of the diaper 1. As shown in FIG.

In the present embodiment, as shown in FIG. 5, a bending guide section group 50 including three strip guide sections 51, 52a and 52b is employed. However, the number of bending guides is not limited to this. For example, two or more side bending guide portions can be formed symmetrically at the positions of both sides of the central bending guide portion 51 with respect to the single center bending guide portion 51. However, in order to ensure the effects of the present invention, it is preferable to form the three-fold bending guide portions as in this embodiment.

Each bending guide part 51, 52a, 52b is a part that acts as a starting point of deformation or a flexible shaft of the absorbent core 5 when an external force is applied to the diaper 1 in a state where the diaper 1 is mounted. For this purpose, each bending guide part 51, 52a, 52b is composed of, for example, a slit, a groove or a non-stacking part extending in the main body longitudinal direction X. A slit is a part which cut | incised toward the thickness direction of the absorptive core 5, and does not have a width | variety. A groove | channel is an elongate recessed part of the predetermined width | variety which has a bottom part. The non-filament portion is a portion where the bottom portion is removed from the groove, and is a portion where no pile fiber such as pulp fibers constituting the absorbent core 5 is present. From the viewpoint of successfully deforming the absorbent core 5, the central bending guide part 51 is constituted by a slit, a groove, or a non-stacking part, and the side bending guide parts 52 a, 52 b are formed by a groove or a non-stacking part. It is preferable to comprise from. As shown in FIG. 5 (b), in this embodiment, each of the bending guide portions 51, 52 a, 52 b is composed of a non-stacked fiber portion that penetrates the entire thickness direction of the absorbent core 5. Regardless of the form of each of the bending guide portions 51, 52a, 52b, the width thereof, that is, the length along the main body width direction Y may be the same at any position in the main body longitudinal direction X. preferable.

The bending guide portions 51, 52a, and 52b constituting the bending guide portion group 50 may have the same width or different widths. In particular, if the bending guide portions 51, 52a and 52b have the same width, the excreted liquid is easily and uniformly diffused in the absorbent core 5, and the entire area of the absorbent core 5 is absorbed by the liquid. Therefore, it is preferable because it can be used effectively. From the viewpoint of making this advantage even more conspicuous, the width of each bending guide 51, 52a, 52b is preferably 1 mm or more, and more preferably 3 mm or more. Moreover, it is preferable that it is 20 mm or less, and it is still more preferable that it is 15 mm or less. For example, the width of each bending guide 51, 52a, 52b is preferably 1 mm or more and 20 mm or less, and more preferably 3 mm or more and 15 mm or less.

The bending guide portions 51, 52a and 52b constituting the bending guide portion group 50 may have the same or different lengths along the main body width direction Y. In particular, if the lengths of the bending guide portions 51, 52a, and 52b are the same, the excreted liquid is easily and evenly diffused in the absorbent core 5, and the entire area of the absorbent core 5 is absorbed by the liquid. Therefore, it is preferable because it can be effectively utilized. From the viewpoint of making this advantage even more conspicuous, the length of each bending guide 51, 52a, 52b is preferably 50 mm or more, and more preferably 100 mm or more. Moreover, it is preferable that it is 350 mm or less, and it is still more preferable that it is 300 mm or less. For example, the length of each bending guide 51, 52a, 52b is preferably from 50 mm to 350 mm, and more preferably from 100 mm to 300 mm.

When the lengths of the bending guide portions 51, 52a, and 52b are the same, the positions of the end portions on the ventral side A side may be the same or different. Similarly, the position of the end portion on the back side B side may be the same or different. In the embodiment shown in FIG. 5, the positions of the end portions on the ventral side A side of the bending guide portions 51, 52 a, 52 b are the same, and therefore the positions of the end portions on the back side B side are also the same. ing.

The bending guide part group 50 is located closer to the crotch part C than the lower end part 31A of the ventral sheet member 31 which is an exterior body located on the ventral part A. Further, the bending guide portion group 50 is not present on the back side portion. That is, the bending guide part group 50 is located only between the lower end part 31 </ b> A of the abdominal sheet member 31 and the lower end part 32 </ b> A of the back side sheet member 32. By arranging the bending guide portion group 50 at such a position, the absorption capacity of the liquid by the absorbent core 5, the good diffusibility of the liquid in the absorbent core 5, and the good wearing feeling of the diaper 1. Balance can be achieved. In particular, among the end portions of the bending guide portions 51, 52 a, 52 b, the end portion T ₁ (see FIG. 5) on the back seat member 32 side, the second region 42 and the first region 41 in the absorbent core 5. When the distance to the boundary position T ₂ (see FIG. 5) is set to 5 mm or more and 50 mm or less, particularly 10 mm or more and 45 mm or less, liquid diffusion occurs only in the first area 41 which is a high basis weight area. Since it becomes easy, it is preferable. As a result, the absorbent core 5 is easily bent and deformed, and the feeling of wearing the diaper 1 is further improved.

In particular, it is preferable that the bending guidance part group 50 is absent on the back side B side from the position of the stool excretion part of the wearer because the excreted stool is difficult to adhere to the wearer's skin. . “Non-existing on the dorsal side B side” means that the positions of the end portions on the dorsal side B side of all the bending guiding parts constituting the bending guiding part group 50 are from the position of the stool excretion part of the wearer. Is also biased to the ventral side A side.

As described above, the entire surface of the absorbent core 5 is covered with a liquid permeable sheet such as a core wrap sheet. As a result, the liquid-permeable sheet is disposed opposite to the skin facing surface side and the non-skin facing surface side of the absorbent core. Then, the central bending guide part 51 and the side part are arranged between the liquid permeable sheet disposed opposite to the space and the space between the liquid permeable sheets where the constituent material of the absorbent core 5 is absent. Bending guide portions 52a and 52b are defined. In other words, the central bending guiding part 51 and the side bending guiding parts 52a and 52b are closed spaces. By adopting such a configuration, even if the absorbent core 5 absorbs the excreted liquid and the water-absorbing polymer swells, an increase in volume due to the swelling is absorbed by the space. There is an advantageous effect that inhibition of swelling of the polymer hardly occurs. Moreover, since the space is a closed space, the swollen water-absorbing polymer is not likely to fall out of the diaper 1.

The absorbent core 5 used in the diaper 1 of the present embodiment uses, for example, a stacking drum having recesses formed on the peripheral surface, and deposits hydrophilic fibers such as pulp fibers and water-absorbing polymer particles in the recesses. Thus, when the fiber stack is manufactured, it can be manufactured by making the portion to be the second region 42 which is the low basis weight region out of the air permeable member constituting the bottom of the concave portion low air permeable. Thereby, the 1st field 41 and the 2nd field 42 can be formed successfully. The bending guide part group 50 is a non-ventilated non-stacked fiber part in which the positions of the bending guide parts 51, 52a, and 52b forming the bending guide part group 50 of the air-permeable members are not vented. do it.

FIG. 6 shows an absorbent core 5 used in another embodiment of the present invention. Note that the description in detail with respect to FIG. 5 described above is appropriately applied to points that are not particularly described with reference to FIG. In FIG. 6, the same members as those in FIG. 5 are denoted by the same reference numerals. The absorbent core 5 of the present embodiment also has an abdominal side A, a back side B, and a crotch C corresponding to the diaper 1. While the absorbent core of the embodiment shown in FIG. 5 has two regions of the first region 41 and the second region 42 having different basis weights, the absorbent core 5 of the embodiment shown in FIG. In addition to the first area 41 and the second area 42, the apparatus further includes a third area 43 having a basis weight lower than that of the first area 41 and higher than that of the second area 42. The first region 41 includes at least the crotch part C. The second region 42 includes at least the back side portion B. The third region 43 includes at least the ventral portion A. “The third region 43 includes at least the ventral portion A” means that the third region 43 includes the ventral portion A and may include other regions, for example, the crotch portion C.

When the absorbent core 5 is viewed along the main body width direction Y, the basis weight of the first region 41 is the same in any part (except for the bending guide group 50). Similarly, when viewed along the main body width direction Y, the basis weights of the second region 42 and the third region 43 are the same in any part.

The high basis weight first region 41 is formed so as to include the crotch portion C, the low basis weight second region 42 is formed so as to include the back side portion B, and the medium basis weight third region 43 is included. Is formed so as to include the ventral portion A, when the absorbent core 5 absorbs and swells the excreted liquid, the degree of swelling of the second basis area 42 of low basis weight, and the medium basis weight The degree of swelling of the third region 43 can be suppressed. As a result, the absorbent core 5 can suppress pressure on the waist and abdomen of the wearer due to swelling. This is particularly advantageous when the wearer is lying on his / her face down.

From the viewpoint of making the above advantageous effects more prominent, the basis weight of the third region 43 is preferably 105% or more with respect to the basis weight of the second region 42, and preferably 110% or more. Further preferred. Moreover, it is preferable that it is 200% or less, and it is still more preferable that it is 180% or less. For example, the basis weight of the third region 43 is preferably 105% or more and 200% or less, and more preferably 110% or more and 180% or less with respect to the basis weight of the second region 42. Furthermore, the basis weight of the third region 43 is preferably 50% or more, and more preferably 60% or more with respect to the basis weight of the first region 41. Moreover, it is preferable that it is 95% or less, and it is still more preferable that it is 85% or less. For example, the basis weight of the third region 43 is preferably 50% or more and 95% or less, and more preferably 60% or more and 85% or less with respect to the basis weight of the first region 41.

Similarly, from the viewpoint of making the above advantageous effects more prominent, the length of the first region 41 is preferably 40% or more of the entire length of the absorbent core 5, and preferably 45% or more. More preferably, it is more preferably 50% or more. Further, it is preferably 80% or less, more preferably 75% or less, and further preferably 70% or less. For example, the length of the first region 41 is preferably 40% or more and 80% or less of the entire length of the absorbent core 5, more preferably 45% or more and 75% or less, and 50% or more and 70% or less. More preferably. On the other hand, the length of the second region 42 is preferably 10% or more and 50% or less, and more preferably 15% or more and 40% or less of the entire length of the absorbent core 5. Furthermore, the length of the third region 43 is preferably 2.5% or more and 30% or less, and more preferably 5% or more and 20% or less of the entire length of the absorbent core 5.

The ratio of the basis weight of the third region 43 to the basis weight of the first region 41 and the basis weight of the second region 42 is as described above, and the basis weight of the third region 43 that is the middle basis weight region itself. The value is preferably 125 g / m ² or more, and more preferably 200 g / m ² or more. Moreover, it is preferable that it is 800 g / m < ² > or less, and it is still more preferable that it is 750 g / m < ² > or less. For example, the basis weight of the third region 43 is preferably 125 g / m ² or more and 800 g / m ² or less, and more preferably 200 g / m ² or more and 750 g / m ² or less. On the other hand, the basis weight of the first region 41 and the basis weight of the second region 42 are the same as in the embodiment shown in FIG.

The magnitude relation of the basic weight of the 1st area | region 41 mentioned above, the 2nd area | region 42, and the 3rd area | region 43 is a place where the basic weight measured about the whole absorptive core 5 is compared. The basis weight of hydrophilic fibers such as pulp fibers and the basis weight of the water-absorbing polymer are preferably higher in the order of the second region 42, the third region 43, and the first region 41. Such a basis weight relationship is preferable because it can improve the absorption capacity near the urination point and is effective not only in preventing liquid leakage but also in suppressing gel blocking.

Between the first region 41 and the second region 42 and between the first region 41 and the third region 43, a difference in thickness due to a difference in basis weight may or may not have occurred. Also good. The difference in thickness due to the difference in basis weight, that is, whether or not a step is generated between the regions 41 and 42 and between the regions 41 and 43 is not critical for achieving the advantageous effects of the present invention. Regardless of whether or not such a step is generated, it is preferable that the absorbent core 5 is formed of a single structure also in this embodiment. The advantage of constituting the absorbent core 5 from a single structure is the same as that of the embodiment shown in FIG.

Also in this embodiment, the absorptive core 5 has the bending induction | guidance | derivation part group 50 which consists of the multiple bending | flexion induction | guidance | derivation part 51, 52a, 52b extended in the main body longitudinal direction X in the 1st area | region 41. FIG. . The bending guide part group 50 is located closer to the crotch part C than the lower end part 31A of the ventral sheet member 31 which is an exterior body located on the ventral part A. Further, the bending guide portion group 50 is not present on the back side portion. As a result, the bending guide part group 50 is located only between the lower end part 31 </ b> A of the abdominal sheet member 31 and the lower end part 32 </ b> A of the back side sheet member 32. By adopting the bending guide portion group 50 having such a configuration, the same advantageous effects as those of the embodiment shown in FIG. 5 can be obtained.

FIG. 7 shows still another embodiment of the present invention. Note that the description in detail with respect to FIGS. 5 and 6 described above is appropriately applied to points that are not particularly described with reference to FIG. In FIG. 7, the same members as those in FIGS. 5 and 6 are denoted by the same reference numerals. The absorptive core 5 shown in FIG. 7 has the 1st area | region 41 and the 2nd area | region 42 from which basic weight differs. The first region 41 includes at least the crotch part C. On the other hand, the second region 42 includes a ventral second region 42A including at least the ventral portion A and a dorsal second region 42B including at least the dorsal portion B. “The first region 41 includes at least the crotch portion C” means that the first region 41 includes the crotch portion C, and other regions such as a part of the abdominal part A and a part of the dorsal part B. It means that it may contain. Further, “the ventral second region 42A includes at least the ventral portion A” means that the ventral second region 42A includes the ventral portion A and further includes other regions such as the crotch portion C. Means good. Similarly, “the dorsal second region 42B includes at least the dorsal portion B” means that the dorsal second region 42B includes the dorsal portion B and further includes other regions such as the crotch portion C. Means good. In the following description, the term “second region 42” refers to both the abdominal second region 42A and the dorsal second region 42B.

The absorbent core 5 has a vertically long and substantially rectangular shape in plan view. The longitudinal direction of the absorbent core 5 coincides with the body longitudinal direction X. When the absorbent core 5 is viewed along the main body longitudinal direction X, the first region 41 has a higher basis weight than the second region 42. When viewed along the body width direction Y, the basis weight of the first region 41 is the same in any part (however, the bending guide group is excluded). Similarly, when viewed along the body width direction Y, the basis weight of the second region 42 is the same in any part. Further, the basis weights of the ventral second region 42A and the dorsal second region 42B are substantially the same. “Substantially the same” means that the difference in basis weight is less than ± 10%.

It is excreted by forming the first area 41 having a high basis weight so as to include the crotch part C and forming the second area 42 having a low basis weight so as to include the ventral part A and the dorsal part B. When the absorbent core 5 absorbs the liquid and swells, the degree of swelling of the second area 42 having a low basis weight can be suppressed. As a result, it is possible to suppress pressure on the wearer's abdomen and waist due to swelling of the absorbent core 5. In particular, the extension portion 35E (see FIGS. 2 and 3) in the outer layer sheet material 35 constituting the ventral sheet member 31 and / or the dorsal sheet member 32 described above has a length L along the longitudinal direction X of the main body. _1, and also, when the length along the body longitudinal direction X of the region overlapping the ventral second regions 42A and / or the back-side second region 42B of the extending portion 35E was _{L 2, L 2} with respect to _{L 1} When the value of [L ₂ / L ₁ ] × 100, which is the ratio of the above, is 50% or more and 100% or less, particularly 60% or more and 100% or less, the ventral second region 42A and / or the dorsal second region 42B is This is preferable because it is less likely to swell and the discomfort is less likely to occur when the diaper 1 is worn. This is particularly advantageous when the wearer is lying prone or lying on his back. Furthermore, liquid leakage from the crotch part C can be effectively prevented. In addition, the expansion and contraction of the exterior body forming elastic member 33 attached to the abdominal sheet member 31 and the back sheet member 32 is less likely to be hindered. Therefore, the diaper 1 of the present embodiment is particularly suitable as a diaper for a low-age infant before being able to do yes. The term “old age” as used herein refers to an infant up to 12 months of age or an infant weighing up to 8000 g.

From the viewpoint of making the above advantageous effects more prominent, the basis weight of the first region 41 is preferably 110% or more with respect to the basis weight of the second region 42, and preferably 120% or more. Further preferred. Further, it is preferably 400% or less, and more preferably 300% or less. For example, the basis weight of the first region 41 is preferably 110% or more and 400% or less, and more preferably 120% or more and 300% or less with respect to the basis weight of the second region 42.

Similarly, from the viewpoint of making the above advantageous effects more prominent, the length of the first region 41 is preferably 40% or more of the entire length of the absorbent core 5, and preferably 45% or more. More preferably, it is more preferably 50% or more. Further, it is preferably 80% or less, more preferably 75% or less, and further preferably 70% or less. For example, the length of the first region 41 is preferably 40% or more and 80% or less of the entire length of the absorbent core 5, more preferably 45% or more and 75% or less, and 50% or more and 70% or less. More preferably. On the other hand, the length of the ventral second region 42A and the dorsal second region 42B is preferably 10% or more and 30% or less of the entire length of the absorbent core 5, and is preferably 12% or more and 28% or less. More preferably, it is 15% or more and 25% or less. When the length of the ventral second region 42A and the length of the dorsal second region 42B are different, the ventral second region 42A may be longer, or the dorsal second region 42B may be longer. Also good.

The ratio of the basis weight of the first region 41 and the basis weight of the second region 42 is as described above, and the value of the basis weight itself of the second region 42 that is the low basis weight region is 100 g / m ² or more. Preferably, it is 120 g / m ² or more, and more preferably 150 g / m ² or more. Also it is preferably 600 g / ^{m 2} or less, further preferably 550 g / ^{m 2} or less, and still more preferably 500 g / ^{m 2} or less. For example, the basis weight of the second region 42 is preferably 100 g / m ² or more and 600 g / m ² or less, more preferably 120 g / m ² or more and 550 g / m ² or less, and 150 g / m ² or more and 500 g / m ² or less. More preferably, it is m ² or less. On the other hand, the basis weight of the first region 41, on condition that the ratio of the basis weight and the basis weight of the second region 42 of the first region 41 is within the above range, 150 g / ^{m 2} or more 900 g / ^{m 2} preferably less, and more preferably still more preferably 180 g / ^{m 2} or more 850 g / ^{m 2} or less, 200 g / ^{m 2} or more 800 g / ^{m 2} or less.

The magnitude relation of the basic weight of the 1st field 41 mentioned above and the 2nd field 42 is a place where the basic weight measured about the whole absorptive core 5 is compared, pulp fiber etc. which constitute absorptive core 5 The first region 41 is preferably higher than the second region 42 with respect to the basis weight of the hydrophilic fiber and the basis weight of the water-absorbing polymer. That is, it is preferable that the basis weight of the hydrophilic fiber constituting the first region 41 is higher than the basis weight of the hydrophilic fiber constituting the second region 42. Further, the basis weight of the water-absorbing polymer constituting the first region 41 is preferably higher than the basis weight of the water-absorbing polymer constituting the second region 42. Such a basis weight relationship is preferable because it can improve the absorption capacity near the urination point and is effective not only in preventing liquid leakage but also in suppressing gel blocking. In this case, it is preferable that the basis weight of the hydrophilic fiber in the ventral second region 42A and the basis weight of the hydrophilic fiber in the dorsal second region 42B are substantially the same. It is preferable that the basis weight of the water absorbent polymer in the region 42A and the basis weight of the water absorbent polymer in the back-side second region 42B are substantially the same. The meaning of “substantially” is as described above.

As shown in FIG. 7, the first region 41 has a bending guide portion group 50 composed of a plurality of bending guide portions 51, 52 a, 52 b extending in the longitudinal direction X of the main body. The bending guide portion group 50 includes a central bending guide portion 51 located in the central region in the body width direction Y, and a pair of side bending guide portions 52a and 52b located on both sides of the central bending guide portion 51. Consists of. The bending guide portions 51, 52a, and 52b constituting the bending guide portion group 50 may have the same or different lengths along the main body longitudinal direction X. In particular, it is preferable that the lengths of the side bending guide portions 52a and 52b are the same because the fit at the time of mounting becomes better. From the viewpoint of making this advantage even more conspicuous, the length of each side bending guide 52a, 52b is preferably 50 mm or more, and more preferably 70 mm or more. Moreover, it is preferable that it is 300 mm or less, and it is still more preferable that it is 250 mm or less. For example, the length of each side bending guide 52a, 52b is preferably 50 mm or more and 300 mm or less, and more preferably 70 mm or more and 250 mm or less.

When the lengths of the side bending guide portions 52a and 52b are the same, the positions of the end portions on the ventral side A side may be the same or different. Similarly, the position of the end portion on the back side B side may be the same or different. In the embodiment shown in FIG. 7, the positions of the end portions on the ventral side A side of the side bending guide portions 52 a and 52 b are the same, and therefore the positions of the end portions on the back side B side are also the same. ing.

On the other hand, the central bending guiding part 51 is shorter than the side bending guiding parts 52a and 52b, and efficiently absorbs excrement without leaking in a young infant with little movement before yes. This is preferable from the viewpoint that the fitting property can be improved. From the viewpoint of making this effect even more prominent, the length of the central bending guiding portion 51 is preferably 20% or more of the length of the side bending guiding portions 52a and 52b, more preferably 30% or more. More preferably. Further, it is preferably 80% or less, and more preferably 70% or less. For example, the length of the central bending guiding portion 51 is preferably 20% to 80% and more preferably 30% to 70% of the length of the side bending guiding portions 52a and 52b. .

When the center bending guide part 51 is shorter than the side part bending guide parts 52a and 52b, the both ends of the center bending guide part 51 are longer than the both end parts of the side part bending guide parts 52a and 52b. It can be positioned closer to the center in the direction X. Alternatively, one end portion of both end portions of the central bending guide portion 51 is closer to the end in the main body longitudinal direction X than one end portion of both end portions of the side bending guide portions 52a and 52b. Can be located. Furthermore, as shown to Fig.5 (a), the position of one edge part of the both ends of the center bending induction | guidance | derivation part 51 is set as one edge part of the both ends of the side part bending induction parts 52a and 52b. Can be matched with the position of. Among these forms, it is preferable to employ the form shown in FIG. 5A because the fit at the time of wearing increases and the comfort at the time of wearing improves.

In particular, as shown in FIG. 5 (a), at the position near the ventral side A, the position of the end near the ventral side A among the both ends of the central bending guide 51 is set to the side bending guide 52a. , 52b, it is preferable to match the position of the end portion near the ventral side portion A because the fit property at the crotch is further improved. In this case, it is preferable that the edge part near the back side part B of the both ends of the center bending guide part 51 is located on the crotch side from the urination point.

Next, still another embodiment of the present invention will be described with reference to FIGS. Note that the description in detail with respect to FIGS. 1 to 7 described above is appropriately applied to points that are not particularly described with reference to FIGS. 8 to 12, the same members as those in FIGS. 1 to 7 are denoted by the same reference numerals. The pants-type disposable diaper 1 of the present embodiment is a so-called split-type pants-type disposable diaper. The diaper 1 is a pants-type disposable diaper including an absorbent main body 2 including a vertically long absorbent body 23 and an exterior body 3 fixed to the non-skin facing surface side of the absorbent main body 2.

As shown in FIG. 8, the diaper 1 includes an absorbent main body 2 and an exterior body 3 positioned on the non-skin facing surface side of the absorbent main body 2. And the exterior body 3 of the diaper 1 has the abdominal sheet member 31 and the back sheet member 32. The diaper 1 has both side portions along the longitudinal direction (X direction) of the ventral sheet member 31 and both side portions along the longitudinal direction (X direction) of the back side seat member 32, and a pair of side seal portions S. , S, a waist opening WO, and a pair of leg openings LO, LO. For the joining, for example, a known joining method such as heat sealing, high frequency sealing, ultrasonic sealing, adhesive, or the like is used.

In the diaper 1, the abdominal sheet member 31 and the back sheet member 32 constituting the exterior body 3 are each a rectangle that is long in the width direction (Y direction) when the diaper 1 is unfolded and expanded (see FIG. 9). It has a shape. As shown in FIGS. 8 and 12, the ventral sheet member 31 and the dorsal sheet member 32 are both disposed on the skin facing surface side of the outer layer sheet material 35 that forms the outermost surface of the diaper and the outer layer sheet material 35. An inner layer sheet material 36 and a plurality of thread-like elastic members 33 disposed between the sheets 35 and 36 are provided. The outer layer sheet material 35 and the inner layer sheet material 36 are formed in the same shape and size, and each has a rectangular shape that is long in the width direction (Y direction) when the diaper 1 is unfolded and expanded (see FIG. 9). is doing. The plurality of elastic members 33 extend in the width direction (Y direction), respectively, and are arranged at intervals in the longitudinal direction (X direction) of the diaper. The outer layer sheet material 35 and the inner layer sheet material 36 are superposed with the contours of each other being coincident with each other, and are joined to each other by a large number of fused portions (not shown) arranged in a dotted pattern. In the diaper 1, the plurality of elastic members 33 are arranged between the outer layer sheet material 35 and the inner layer sheet material 36 so as not to pass through the fused portion (not shown).

As shown in FIG. 8, each of the abdominal sheet member 31 and the back sheet member 32 has a weakly functioning area where the elastic member 33 has a reduced expansion / contraction function in an area overlapping the absorbent main body 2. . More specifically, the plurality of elastic members 33 in the abdominal sheet member 31 and the back sheet member 32 are each divided into a plurality of pieces in the region overlapping the absorbent main body 2, and the elastic members are finely divided. 33 no longer has a contracting force and forms a weakly functionalized region in the ventral seat member 31 and the dorsal seat member 32.

As shown in FIG. 12, the absorbent main body 2 of the diaper 1 has a rectangular absorbent body 23 that is long in the longitudinal direction (X direction), and a liquid-permeable surface sheet disposed on the skin facing surface side of the absorbent body 23. 21 and a liquid-impervious back sheet 22 disposed on the non-skin facing surface side of the absorbent body 23, and as shown in FIG. 9, is formed in a rectangular shape that is long in the longitudinal direction (X direction). ing.

In the diaper 1, as shown in FIGS. 9 to 11, on both sides along the longitudinal direction (X direction) of the absorbent main body 2, it is liquid-resistant or water-repellent and ventilated over the entire length of the absorbent main body 2. Three-dimensional gathers 4 and 4 made of a sex material are formed. In the vicinity of the free end of each three-dimensional gather 4, a three-dimensional gather forming elastic member 42 is arranged in an extended state. While the diaper 1 is worn, the three-dimensional gather forming elastic member 42 contracts to raise the three-dimensional gather 4 to form a gather on the crotch C, and outward from the absorbent main body 2 in the width direction (Y direction). The outflow of liquid to the is prevented.

The absorbent body 23 of the absorbent main body 2 includes an absorbent core (not shown) in which water-absorbing polymer particles are held in an aggregate of fibers such as pulp fibers, and a core that covers the absorbent core (not shown). It consists of a wrap sheet (not shown). This absorptive core has the same structure as any one of the absorptive cores shown in FIGS. In the diaper 1, the absorptive core which comprises the absorber 23 has the thickness of the back side B side (the part which overlaps with the back side seat member 32 of the back side B) as shown in FIG. From the viewpoint of reducing the thickness of the side portion A side (the portion overlapping the ventral side sheet member 31 of the ventral side portion A) and making the back side portion B more flexible, the ventral side portion It is preferably 10% or more and 75% or less of the thickness of the A side (portion overlapping the ventral sheet member 31 of the ventral side A), and is 15% or more and 50% or less of the thickness of the ventral side A side. More preferably. Specifically, the thickness of the absorbent core 5 on the back side B side is preferably 0.5 mm or more and 6 mm or less, and more preferably 1 mm or more and 5 mm or less. The thickness of the absorptive core on the ventral part A side is preferably 1 mm or more and 9 mm or less, and more preferably 2 mm or more and 7.5 mm or less. The thickness of the absorbent core is measured under no load.

In the split type diaper 1, the back side sheet member 32 of the back side B and the absorbent main body 2 overlap with the absorbent core on the back side B side or the absorbent core on the abdominal side A side. Or a portion where the abdominal sheet member 31 of the abdominal side A and the absorbent main body 2 overlap, in the case of a disposable diaper other than the split type, unfold the pants-type disposable diaper In the stretched state, the exterior body 3 is divided into three equal parts in the X direction, and divided into a back side part, a crotch part, and an abdomen side part, and the absorbent core disposed on the divided back side part or the divided part. It means the absorptive core arranged on the ventral part.

Moreover, in the diaper 1, the absorptive core which comprises the absorber 23 has the basis weight of the back side part B side (part which overlaps the back side sheet | seat member 32 of the back side part B), the stomach side part A side. From the standpoint of making the dorsal side portion more flexible, the basis weight of the ventral side portion A is smaller than the basis weight of the portion overlapping the ventral side sheet member 31 of the ventral side portion A. The amount is preferably 10% to 75%, more preferably 20% to 65% of the basis weight on the ventral part A side. Specifically, the basis weight of the absorbent core on the back side B side is preferably 50 g / m ² or more and 500 g / m ² or less, and more preferably 75 g / m ² or more and 400 g / m ² or less. preferable. Further, the basis weight of the absorbent core on the ventral side A side is preferably 150 g / m ² or more and 900 g / m ² or less, and more preferably 200 g / m ² or more and 800 g / m ² or less.

Further, in the diaper 1, the absorbent core constituting the absorbent body 23 has a density on the back side B side (portion overlapping the back side sheet member 32 of the back side B) on the ventral side A side ( From the viewpoint of making the dorsal region more flexible, the density of the ventral region A side is 10%. % Or more and 75% or less, more preferably 20% or more and 65% or less of the density on the ventral side A side. Specifically, the density of the absorbent core on the back side B side is preferably 0.01 g / cm ³ or more and 0.75 g / cm ³ or less, and 0.03 g / cm ³ or more and 0.55 g / cm. More preferably, it is ³ or less. Further, the density of the absorbent core on the ventral part A side is preferably 0.1 g / cm ³ or more and 1 g / cm ³ or less, and preferably 0.15 g / cm ³ or more and 0.8 g / cm ³ or less. Is more preferable.

Furthermore, in the diaper 1, the absorbent body 23 on the back side portion B side (the portion overlapping the back side sheet member 32 of the back side portion B) has an absorptive polymer content in the ventral side portion A. It is less than the content of the absorbent polymer constituting the absorbent body 23 on the side (portion overlapping the ventral sheet member 31 of the ventral side A) so that the dorsal side is more flexible. From the viewpoint of making it, it is preferably 10% or more and 75% or less of the content of the absorbent polymer on the ventral side A side, and 20% or more and 65% or less of the content of the absorbent polymer on the ventral side A side More preferably it is. Specifically, the content of the absorbent polymer on the back side B side is preferably 50 g / m ² or more and 250 g / m ² or less, and more preferably 75 g / m ² or more and 200 g / m ² or less. preferable. Further, the content of the absorbent polymer on the ventral side A side is preferably 100 g / m ² or more and 500 g / m ² or less, and more preferably 150 g / m ² or more and 400 g / m ² or less. The content of the absorbent polymer on the back side B side or the content of the absorbent polymer on the ventral side A side is measured as follows.

<Measurement method of content of absorbent polymer on back side B side or content of absorbent polymer on ventral side A>
Cut the ventral side A side and the back side B side of the absorbent body into 5 points and 10 cm × 10 cm in size, respectively. When a sample of a specified size cannot be taken, the sample is cut out in a range where it can be taken, and the area of the sample is measured using an image analyzer. These samples are each dried at 90 ° C. for 8 hours or more, equilibrated at room temperature, and weighed. Each sample is filled in a pre-weighed mesh bag, and the mesh bag is immersed in an aqueous solution containing 4% by mass ascorbic acid and 0.02% by mass riboflavin, and the aqueous solution is sufficiently contained in the sample. Make it. The mesh bag is taken out from the aqueous solution, and the sample is subjected to low molecular weight treatment with sunlight (ultraviolet rays) for 8 hours × 3 days. The components solubilized by the low molecular weight treatment are separated and removed by washing with water from the mesh bag. If the color of the absorbent polymer colored by riboflavin has not disappeared, or the slimy feeling when washed with water has not disappeared, the mesh bag is immersed again in the aqueous solution and the molecular weight reduction treatment by sunlight is repeated. . The processing is terminated when the color of the polymer has completely disappeared for all the samples and the slimy feeling at the time of washing with water has disappeared. The mesh bag is dewatered by centrifuging for 10 minutes at a speed of 800 rpm with a centrifuge. After drying at 90 ° C. for 18 hours or more and equilibrating at room temperature, the weight of the mesh bag containing the residue is weighed. The value obtained by subtracting the weight of the mesh bag from the weight after the molecular weight reduction treatment is taken as the pulp fiber content in the sample, and the value obtained by subtracting the weight of the pulp fiber from the pre-measured sample weight is converted per unit area. The value is the content of the water-absorbing polymer.

In the diaper 1, the absorbent body 23 has bending guide portions 51, 52a, and 52b as shown in FIG. The bending guiding portions 51, 52a, 52b extend in the longitudinal direction (X direction) over the entire crotch region C. The bending guide portions 51, 52a, 52b are juxtaposed at equal intervals in the width direction (Y direction).

As shown in FIGS. 10 to 12, the diaper 1 has both end portions 2 a and 2 b in the longitudinal direction (X direction) of the absorbent main body 2 in the width direction of the exterior body 3 and the exterior body 3. It is covered with a belt-like sheet 6 extending in the (Y direction), and is fixed between the exterior body 3 and the belt-like sheet 6 via an adhesive 7. More specifically, in the diaper 1, as shown in FIG. 12, the absorbent main body 2 has the abdominal side A end portion 2 a side overlapped with the abdominal sheet member 31, and the non-skin facing surface is the exterior. The inner layer sheet material 32 constituting the body 3 is fixed via an adhesive (not shown). And in the diaper 1, as for the absorptive main body 2, the other end part 2b side by the side of the back side B has overlapped with the back side sheet member 32, and the non-skin opposing surface constitutes the inner layer sheet material which comprises the exterior body 3. 32 is fixed via an adhesive (not shown). That is, in the diaper 1, the absorptive main body 2 is covered with a belt-like sheet 6 in which the skin facing surface on the one end 2a side on the abdominal side A is extended in the width direction (Y direction), and the one end 2a is an adhesive. It is fixed between the ventral sheet member 31 and the belt-like sheet 6 via 7a. And in the diaper 1, the absorptive main body 2 is covered with a belt-like sheet 6 in which the skin facing surface on the other end 2b side on the back side B side extends in the width direction (Y direction), and the other end 2b is It is fixed between the back sheet member 32 and the belt-like sheet 6 via the adhesive 7b.

In the diaper 1, the belt-like sheet 6 that covers both ends 2a and 2b in the longitudinal direction (X direction) of the absorbent main body 2 is the abdominal sheet member when the diaper 1 is unfolded and extended (see FIG. 9). 31 or the back side sheet member 32 extends over the entire region in the width direction (Y direction) and has a long rectangular shape in the width direction (Y direction). The width (length in the X direction) of the belt-like sheet 6 is preferably 10% or more and 60% or less, and 15% or more with respect to the length in the X direction of the ventral sheet member 31 or the back sheet member 32. More preferably, it is 50% or less.

As shown in FIG. 12, the belt-like sheet 6 covers the one end 2a on the ventral side A side of the absorbent main body 2 and is fixed to the ventral sheet member 31 via an adhesive 7a. The belt-like sheet 6 covers the other end 2b on the back side B of the absorbent main body 2 and is fixed to the back side sheet member 32 via an adhesive 7b. Furthermore, in the diaper 1, both end portions (both side portions along the X direction) of the belt-like sheet 6 are formed on both side portions along the longitudinal direction (X direction) of the ventral sheet member 31 and the longitudinal direction (X When the two side portions along the direction) are joined to form the pair of side seal portions S, S, the two side portions of the ventral seat member 31 and the both sides of the back seat member 32 are joined at the same time. Yes.

Regarding the adhesive 7, as shown in FIGS. 10 to 12, the application amount of the adhesive 7 b on the back side B is smaller than the application amount of the adhesive 7 a on the abdominal side A. The application amount of the adhesive 7b is preferably 2/25 or more, more preferably 2/15 or more of the application amount of the adhesive 7a, from the viewpoint of further preventing the absorbent polymer from falling off and improving the wearing feeling. Preferably, the application amount of the adhesive 7a is 4/5 or less, more preferably 2/3 or less, and the application amount of the adhesive 7a is preferably 2/25 or more and 4/5 or less, Preferably they are 2/15 or more and 2/3 or less. Specifically, the coating amount of the adhesive 7b, from the same viewpoint, it is more preferable is preferably 2 g / ^{m 2} or more 10 g / ^{m 2} or less, 2 g / ^{m 2} or more 5 g / ^{m 2} or less . The coating amount of the adhesive 7a, from the same viewpoint, it is more preferable that at 5 g / ^{m 2} or more 25 g / ^{m 2} or less is preferable, 5 g / ^{m 2} or more 15 g / ^{m 2} or less. The application amount of the adhesive 7b on the back side B or the application amount of the adhesive 7a on the abdominal side A is measured as follows.

<Measurement Method of Application Amount of Adhesive 7b on Back Side B or Application Amount of Adhesive 7a on Abdominal Side A>
The strip-like sheet bonded to the ventral side A or the back side B is peeled off from the exterior body and the absorbent body, and then accurately weighed. Further, the area of the belt-like sheet is measured using an image analyzer. By immersing the strip sheet in an organic solvent mixed with isopentyl acetate and normal butyl acetate, the adhesive adhered to the strip sheet is washed away. The band-like sheet after washing is left to stand for about a week and dried, and then accurately weighed. The mass difference between the belt-like sheet before and after washing is calculated, and converted to a value per unit area to obtain the amount of adhesive applied.

The application state of the adhesive 7 will be described. As shown in FIGS. 10 and 11, the adhesives 7 a and 5 b straddle the end edges 2 a 1 and 2 b 1 in the longitudinal direction (X direction) of the absorbent main body 2. It is applied to the belt-like sheet 6. Specifically, in the back side portion B, the adhesive 7b is a belt-like sheet straddling the edge 2b1 of the other end portion 2b on the back side portion B side of the absorbent main body 2, as shown in FIGS. 6 is applied to the non-skin facing surface. Further, in the abdominal side A, the adhesive 7a is formed on the non-banded sheet 6 across the edge 2a1 of the one end 2a on the abdominal side A side of the absorbent main body 2 as shown in FIGS. It is applied to the skin facing surface. Here, the adhesive 7b straddles the edge 2b1 of the other end 2b of the absorbent main body 2 means that the adhesive 7b extends in the longitudinal direction (X direction) around the edge 2b1. And that it intersects the edge 2b1. Similarly, the adhesive 7a also extends in the longitudinal direction (X direction) around the edge 2a1 of the one end 2a of the absorbent main body 2 and intersects the edge 2a1.

As described above, the application amount of the adhesive 7b on the back side B is smaller than the application amount of the adhesive 7a on the abdominal side A. In the diaper 1, the adhesive 7b The area is lower than the application area of the adhesive 7a. The application area of the adhesive 7b is preferably 2/25 or more, more preferably 2/15 or more of the application area of the adhesive 7a from the viewpoint of further preventing the absorbent polymer from falling off and improving the wearing feeling. Preferably, the application area of the adhesive 7a is 4/5 or less, more preferably 2/3 or less, and the application area of the adhesive 7a is preferably 2/25 or more and 4/5 or less, Preferably they are 2/15 or more and 2/3 or less. Specifically, the application area of the adhesive 7b is preferably 1 cm ² or more and 60 cm ² or less, and more preferably 3 cm ² or more and 40 cm ² or less from the same viewpoint. The application area of the adhesive 7a is preferably 5 cm ² or more and 80 cm ² or less, and more preferably 8 cm ² or more and 60 cm ² or less from the same viewpoint. Here, the area of the adhesive 7b being lower than the application area of the adhesive 7a means that the application line of the adhesive 7b is thinner than the application line of the adhesive 7a, and the adhesive. This means that at least one of the application numbers of 7b is smaller than the application number of the adhesive 7a is satisfied.

In the diaper 1, as shown in FIGS. 10 and 12, the adhesive 7 b on the back side B is formed in the vicinity of the edge 2 b 1 of the other end 2 b of the absorbent body 2, and the absorbent main body 2 and the back seat member. In other words, it is applied to the region where 32 overlaps, in other words, only in the entire width direction (Y direction) of the absorbent main body 2 in a line drawing a spiral extending in the width direction (Y direction). The number of coating lines for drawing a spiral is preferably one to three. In the diaper 1, two are formed. The application lines that draw these two spirals are arranged intermittently so that they partially overlap each other in the X direction.

Moreover, in the diaper 1, as shown in FIG.11 and FIG.12, the adhesive agent 7a of the abdominal part A is the absorptive main body 2 and the abdominal sheet member in the edge 2a1 vicinity of the one end part 2a of the absorptive main body 2. In the region where 31 is overlapped, in other words, it is preferable that there are 2 to 5 coating lines for drawing a spiral only in the entire width direction (Y direction) of the absorbent main body 2. In the diaper 1, Four are formed. The application lines that draw these four spirals are arranged intermittently so that they partially overlap each other in the X direction.

In the diaper 1, as shown in FIGS. 10 to 12, the thickness of each coating line that draws the spiral of the adhesive 7 b on the back side B is the thickness of the coating line that draws the spiral of the adhesive 7 a on the ventral side A. It is thinner than the thickness. In addition, the number of application lines that draw the spiral of the adhesive 7b on the back side B is smaller than the number of application lines that draw the spiral of the adhesive 7a on the abdominal side A. Therefore, in the diaper 1, the area of the adhesive 7b is lower than the application area of the adhesive 7a. In the diaper 1, the adhesives 7 a and 7 b are formed in a linear shape that draws a spiral as described above. However, the linear shape that draws a zigzag, a linear shape that extends linearly in the Y direction, It may be formed in a dot shape or an Ω shape. The application area of the adhesive 7b on the back side B or the application area of the adhesive 7a on the abdominal side A is measured as follows.

<Measurement Method of Application Area of Adhesive 7b on Back Side B or Application Area of Adhesive 7a on Abdominal Side A>
The toner is spread on the belt-like sheet on the ventral side A or the back side B. Excess unadhered toner that has not adhered to the adhesive on the belt-like sheet is removed by suction with a vacuum cleaner. When the application pattern of the adhesive in the area where the adhesive is applied is so-called solid coating, and the application shape is a shape that can be easily measured with a ruler or the like, such as a rectangular shape or a square shape Measure the dimensions of the region where the adhesive is applied, such as the length and width, with a ruler or the like, calculate the area, and use it as the adhesive application area. In the case where the adhesive application pattern in the area where the adhesive is applied is applied spirally or in the form of dots by spraying, etc., the area where the adhesive is applied, The area colored with toner is measured under a microscope having an image processing function. In the observation of the portion colored with the toner using a microscope, five areas of 25 mm ² are arbitrarily extracted, and the area of the portion colored with the toner is calculated in detail by observation and image processing.

The formation material of each part of the diaper 1 mentioned above is demonstrated.
As the outer layer sheet material 31 and the inner layer sheet material 32 constituting the stomach side sheet member 31 and the back side sheet member 32 constituting the exterior body 3, various sheet materials conventionally used for absorbent articles such as disposable diapers are used. It can use without a restriction | limiting especially, It is preferable to use a nonwoven fabric. As the nonwoven fabric, an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a single layer nonwoven fabric of a melt blown nonwoven fabric, a laminated nonwoven fabric in which these layers are laminated, or the like can be used. Moreover, as the outer layer sheet material 31 and the inner layer sheet material 32, a sheet in which a nonwoven fabric and a film are integrated can be used.

As the surface sheet 21, the back sheet 22, the absorber 23, the three-dimensional gather forming sheet material 41 and the like constituting the absorbent main body 2, various kinds of materials conventionally used for absorbent articles such as disposable diapers are particularly limited. Can be used. For example, as the surface sheet 21, a single layer or multilayer nonwoven fabric, a perforated film, or the like can be used. As the back sheet 22, a single-layer resin film or a laminate of a resin film and a nonwoven fabric can be used, and a moisture-permeable sheet is preferable from the viewpoint of air permeability. Absorbent body 23 is obtained by coating an absorbent core formed by holding water-absorbing polymer particles on an aggregate of fibers such as pulp fibers (which may be a nonwoven fabric) with a core wrap sheet made of tissue paper or the like. Can be used. As the three-dimensional gather forming sheet material 41, a water-repellent single layer or multilayer nonwoven fabric or the like can be used.

Examples of materials for forming the elastic member 33 constituting the outer package 3 and the three-dimensional gathering elastic member 42 constituting the absorbent main body 2 include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA , Stretchable polyolefin, polyurethane and the like can be used. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber hook etc.) having a cross section of a rectangle, square, circle, polygon, etc., or a multifilament type thread-like one. it can.

As the belt-like sheet 6, various sheet materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation, and a melt blown nonwoven fabric is preferably used from the viewpoint of sweat absorption and prevention of liquid leakage. The basis weight of the belt-like sheet 6 is preferably 5 g / m ² or more and 30 g / m ² or less, more preferably 10 g / m ² or more and 25 g / m ² or less.

Each member can be fixed using an adhesive or heat fusion. As the adhesive (including the adhesive 7) to be used, any adhesive can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hot melt adhesive can be used. . Examples of hot melt adhesives include blocks such as styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), and styrene-ethylene-butylene-styrene copolymer (SEBS). Copolymer-based hot melt adhesives may be mentioned. As heat fusion, if it is used for absorbent articles, such as a disposable diaper, it can use without a restriction | limiting especially, For example, a heat seal, a high frequency seal, and an ultrasonic seal can be used.

The effect of the diaper 1 of this embodiment mentioned above is demonstrated. As shown in FIG. 12, the diaper 1 is configured such that both end portions 2 a and 2 b in the longitudinal direction (X direction) of the absorbent main body 2 are separated from the exterior body 3 and the exterior body 3 in the width direction (Y direction). And is fixed between the exterior body 3 and the belt-like sheet 6 via adhesives 7a and 7b. Therefore, the end portions 2a, 2b of the absorbent main body 2 do not directly touch the wearer's skin, and the absorbent polymer constituting the absorbent body 23 from the end portions 2a, 2b can be prevented from falling off. Usability is improved. Further, as shown in FIGS. 10 to 12, the diaper 1 has an application amount of the adhesive 7 b on the back side B that fixes the belt-like sheet 6, and the amount of the adhesive 7 a on the belly side A that fixes the belt-like sheet 6. It is less than the coating amount. Therefore, the breathability is improved in the dorsal side B rather than the ventral side A, and it is considered with respect to sweat that is easier to scrub in the dorsal region than in the abdominal region at the time of wearing, and the feeling of wear is further increased. improves.

Moreover, in the diaper 1, each adhesive agent 7a, 7b which fixes the strip | belt-shaped sheet | seat 6 is end part edge 2a1, 2b1 of the longitudinal direction (X direction) of the absorptive main body 2 as shown in FIG.10 and FIG.11. Is applied to the belt-like sheet 6. Therefore, it is possible to reliably prevent the absorbent polymer that constitutes the absorber 23 from the end portions 2a and 2b from falling off, and the usability is further improved. Moreover, in the diaper 1, each adhesive agent 7a, 7b is apply | coated to the line which draws a spiral, and also the area | region where the abdominal sheet member 31 or the back sheet member 32 and the absorptive main body 2 have overlapped It is only applied to. Therefore, the air permeability is improved and the wearing feeling is further improved. In particular, in the diaper 1, the area of the adhesive 7 b is lower than the application area of the adhesive 7 a, and further consideration is given to sweat that is more likely to be worn toward the dorsal region than the ventral region when worn. The wearing feeling is further improved.

Moreover, in the diaper 1, since the basic weight of the absorptive core of the abdominal part A side where a wearer's urine tends to concentrate is larger than the basic weight of the absorptive core of the back side part B side, Can be sufficiently absorbed. And since the basis weight of the absorptive core on the back side B side is smaller than the basis weight of the absorptive core on the abdominal side A side, the adhesive 7b of the back side B with a small amount of application, The belt-like sheet 6 can be sufficiently fixed, and the absorbent polymer can be prevented from falling off. In particular, since the content of the absorbent polymer in the absorbent body 23 on the back side B side is smaller than the content of the absorbent polymer in the absorbent body 23 on the ventral side A side, Has the effect of sex.

Moreover, in the diaper 1, the bending induction | guidance | derivation part 51,52a, 52b provided in the absorptive core over the back | dorsal part B side to the abdominal part A side is efficient over the whole area | region of an absorptive core. Urine can be absorbed sufficiently.

In the diaper 1 of the present embodiment, as shown in FIG. 8, a split-type pants-type disposable in which the exterior body 3 includes a ventral sheet member 31 on the ventral part A and a back sheet member 32 on the back part B. It is a diaper, but instead of this, a pants type having an integrated outer layer body 2 in which at least the outer layer sheet 21 constituting the exterior body 3 is continuous over the abdominal side A, the crotch region C and the back side B. It is good also as a disposable diaper.

Further, as shown in FIGS. 10 and 11, the diaper 1 of the present embodiment includes a backside sheet member 32 and an abdominal sheet member 31, with the adhesive 7 b on the back side B and the adhesive 7 a on the abdomen A. Is applied only to the region where the absorbent main body 2 overlaps, but at least one of them covers the entire width direction (Y direction) of the back side sheet member 32 or the abdominal side sheet member 31, in other words, a belt-like shape. It may be applied over the entire Y direction of the sheet 6. Thus, if the adhesive 7 is apply | coated in the whole region, it can wear smoothly, without the strip | belt-shaped sheet | seat 6 being caught at the time of wear.

FIG. 13 shows a pants-type disposable diaper 1 having a configuration different from that of the diaper described so far. In the diaper described so far, the exterior body 3 is divided into the abdominal sheet member 31 and the back sheet member 32. However, in the diaper 1 shown in FIG. To the back side B through the crotch C. The absorbent core 5 in the diaper 1 shown in the figure has the structure shown in FIG. Instead of this, the absorbent core 5 having the configuration shown in FIG. 6 or 7 may be adopted. Also in the diaper of this embodiment, the same advantageous effect as the diaper of the embodiment described so far is exhibited.

As described above, the present invention has been described based on its preferred embodiments, but the present invention is not limited to the above embodiments, and can be appropriately changed within the scope of ordinary knowledge of those skilled in the art. For example, in the embodiment described above, the rear body extension region 32E extending from the lower end portion 32A of the back seat member 32 is formed, but the rear body extension region 32E may not be formed.

The pant-type absorbent article of the present invention is suitably used as a pants-type disposable diaper for adults, children or infants.

The present invention further discloses the following pant-type absorbent articles with respect to the above-described embodiments.
<1>
A vertically long absorbent main body including an absorbent core and an exterior body disposed on the non-skin facing surface side of the absorbent main body and fixed to the absorbent main body, and disposed on the stomach side of the wearer It has an abdominal part, a crotch part arranged in the crotch part, and a dorsal part arranged on the dorsal side, and is located in the exterior body ventral region and the back side part located in the abdominal side part of the exterior body A pants-type absorbent article in which both side edges along the longitudinal direction of the body of the exterior body back side region are joined to each other to form a waist opening and a pair of leg openings,
The absorbent core has at least a first region and a second region having different basis weights, and the first region has a higher basis weight than the second region,
The first region includes at least a crotch portion; the second region includes at least a dorsal side;
The first region has a bending guide portion group composed of a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
The bending guide part group consists of a central bending guide part located in the center region in the width direction of the absorbent core, and a pair of side bending guide parts located on both sides of the central bending guide part,
The bending guide part group is located closer to the crotch than the lower end part of the exterior body located on the abdominal side part, and the pant type absorption in which the bending guide part group is absent on the back side part Sex goods.

<2>
The pants-type absorbent article according to <1>, wherein the first region includes at least a ventral part and a crotch part.
<3>
The underpants-type absorbent article according to <2>, wherein the length of the first region is 50% or more and 90% or less of the entire length of the absorbent core.
<4>
The length of the first region is preferably 50% or more of the entire length of the absorbent core, more preferably 60% or more, still more preferably 70% or more, and 90% or less. The underpants-type absorbent article according to any one of <1> to <3>, preferably 85% or less, and more preferably 80% or less.
<5>
The pants-type absorbent article according to any one of <1> to <4>, wherein the basis weight of the first region is the same at any part when viewed along the width direction of the absorbent main body.
<6>
The pants-type absorbent article according to any one of <1> to <5>, wherein the basis weight of the second region is the same in any part when viewed along the width direction of the absorbent main body.

<7>
The basis weight of the first region is preferably 120% or more with respect to the basis weight of the second region, more preferably 140% or more, and preferably 250% or less, and 230% or less. The pants-type absorbent article according to any one of the above items <1> to <6>, further preferably.
<8>
The basis weight of the second region is preferably 100 g / m ² or more, more preferably 150 g / m ² or more, still more preferably 200 g / m ² or more, and 600 g / m ² or less. preferably there, further preferably 550 g / ^{m 2} or less, to a more preferred wherein <1> not is 500 g / ^{m 2} or less pant-type absorbent article according to any one of <7>.
<9>
The basis weight of the first region 41 is preferably 150 g / m ² or more and 900 g / m ² or less, more preferably 200 g / m ² or more and 850 g / m ² or less, and more preferably 250 g / m ² or more and 800 g / m ^2. The underpants-type absorbent article according to any one of <1> to <8>, more preferably ² or less.
<10>
The absorbent core comprises hydrophilic fibers,
The pants-type absorption according to any one of <1> to <9>, wherein the basis weight of the hydrophilic fiber constituting the first region is higher than the basis weight of the hydrophilic fiber constituting the second region. Sex goods.
<11>
The absorbent core includes a water-absorbing polymer;
The pants-type absorption according to any one of <1> to <10>, wherein the basis weight of the water-absorbing polymer constituting the first region is higher than the basis weight of the water-absorbing polymer constituting the second region. Sex goods.

<12>
A third region having a lower basis weight than the first region and a higher basis weight than the second region;
The pants-type absorbent article according to any one of <1> to <11>, wherein the third region includes at least a ventral part.
<13>
The pants-type absorbent article according to any one of <1> to <12>, wherein the length of the first region is 40% to 80% of the entire length of the absorbent core.
<14>
The length of the first region is preferably 40% or more of the entire length of the absorbent core, more preferably 45% or more, still more preferably 50% or more, and 80% or less. The underpants-type absorbent article according to any one of the above items <1> to <13>, preferably 75% or less, and more preferably 70% or less.
<15>
A third region having a lower basis weight than the first region and a higher basis weight than the second region;
The third region includes at least the ventral side;
The basis weight of the third region is preferably 105% or more with respect to the basis weight of the second region, more preferably 110% or more, and preferably 200% or less, and 180% or less. The pants-type absorbent article according to any one of the above items <1> to <14>, which is more preferably present.
<16>
A third region having a lower basis weight than the first region and a higher basis weight than the second region;
The third region includes at least the ventral side;
The basis weight of the third region is preferably 50% or more with respect to the basis weight of the first region, more preferably 60% or more, and preferably 95% or less, and 85% or less. The pants-type absorbent article according to any one of the above items <1> to <15>, more preferably.

<17>
A third region having a lower basis weight than the first region and a higher basis weight than the second region;
The third region includes at least the ventral side;
The basis weight of the third region is preferably 125 g / m ² or more, more preferably 200 g / m ² or more, more preferably 800 g / m ² or less, and 750 g / m ² or less. More preferably, the underpants-type absorbent article according to any one of the above items <1> to <16>.
<18>
The underpants-type absorbent article according to any one of <1> to <17>, wherein the bending guide section group is absent on the back side of the stool excretion part of the wearer.
<19>
The underpants-type absorbent article according to any one of the above items <1> to <18>, wherein the widths of the bending guide portions constituting the bending guide portion group are the same.
<20>
The width of each bending guide part is preferably 1 mm or more, more preferably 3 mm or more, more preferably 20 mm or less, and even more preferably 15 mm or less <1> to <19 > The underpants type absorbent article of any one of>.
<21>
The underpants-type absorbent article according to any one of <1> to <20>, wherein the lengths of the bending guide portions constituting the bending guide portion group are the same.

<22>
The length of each bending guide portion is preferably 50 mm or more, more preferably 100 mm or more, more preferably 350 mm or less, and even more preferably 300 mm or less <1> to <21> The underpants type absorbent article of any one of. <23>
Each side bending guide part extends in parallel with the central bending guide part,
The underpants-type absorbent article according to any one of <1> to <22>, wherein the distance between each side bending guide portion and the central bending guide portion is the same.
<24>
The position of the end part on the ventral part side of each bending guide part is the same, and the position of the end part on the dorsal part side is also the same. Any one of <1> to <23> Pants-type absorbent article.
<25>
The underpants-type absorbent article according to any one of <1> to <24>, wherein the absorbent core is composed of a single-layer structure.
<26>
The liquid-permeable sheet which covers this absorptive core is oppositely arranged on the skin opposing surface side and non-skin opposing surface side of an absorptive core,
A central folding guide portion is defined by the liquid-permeable sheet disposed oppositely and a space that is located between the liquid-permeable sheets and in which the constituent material of the absorbent core is absent. The underpants-type absorbent article according to any one of <1> to <25>.
<27>
Wherein one end of each bent guiding section, the end portion T ₁ of the dorsal sheet member side, the distance between the boundary position T ₂ of the second region and the first region of the absorbent core, or 5mm The pants-type absorbent article according to any one of <1> to <26>, which is 50 mm or less, particularly 10 mm or more and 45 mm or less.

<28>
The exterior body includes a ventral sheet member positioned on the ventral part and a dorsal sheet member positioned on the dorsal part,
The underpants-type absorbent article according to any one of <1> to <27>, wherein the absorbent main body is fixed across both sheet members.
<29>
The pants-type absorbent article according to the above <28>, wherein a rear body extending region extending further downward in the longitudinal direction is continuously provided from a lower end portion in the longitudinal direction of the back side sheet member.
<30>
In the rear body extension region, the extension region gathers are formed by extending the extension region elastic member between the outer layer sheet material and the inner layer sheet material. Pants-type absorbent article.
<31>
A length extending portion in the outer layer sheet constituting the year dorsal sheet member along the body longitudinal direction X and L _1, the length along the body longitudinal direction X of the region overlapping the second region of the extending portion when the L _2, a ratio of _{L 2} for _{L 1 [L 2 / L 1} ] value of × 100 or more and 100% or 50% or less, especially 60% or more and 100% or less, to the <28> to <30> The absorbent article according to any one of 30>.
<32>
The underpants-type absorbent article according to any one of <1> to <26>, wherein the exterior body is disposed from the abdominal side to the back side through the crotch.

<33>
A vertically long absorbent main body including an absorbent core and an exterior body disposed on the non-skin facing surface side of the absorbent main body and fixed to the absorbent main body, and disposed on the stomach side of the wearer It has an abdominal part, a crotch part arranged in the crotch part, and a dorsal part arranged on the dorsal side, and is located in the exterior body ventral region and the back side part located in the abdominal side part of the exterior body A pants-type absorbent article in which both side edges along the longitudinal direction of the body of the exterior body back side region are joined to each other to form a waist opening and a pair of leg openings,
The absorbent core has at least a first region and a second region having different basis weights, and the first region has a higher basis weight than the second region,
The first region includes at least a crotch portion, the second region includes at least a ventral portion and a dorsal portion,
The first region has a bending guide portion group composed of a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
The bending guide part group consists of a central bending guide part located in the center region in the width direction of the absorbent core, and a pair of side bending guide parts located on both sides of the central bending guide part,
The bending guide part group is located closer to the crotch than the lower end part of the exterior body located on the abdominal side part, and the pant type absorption in which the bending guide part group is absent on the back side part Sex goods.

<34>
The pants-type absorbent article according to <33>, wherein the length of the first region is 40% or more and 80% or less of the entire length of the absorbent core.
<35>
The length of the first region is preferably 40% or more of the entire length of the absorbent core, more preferably 45% or more, still more preferably 50% or more, and 80% or less. The pants-type absorbent article according to <33> or <34>, preferably 75% or less, and more preferably 70% or less.
<36>
The lengths of the second region on the ventral side and the second region on the dorsal side are each independently preferably 10% or more and 30% or less, and 12% or more and 28% or less of the total length of the absorbent core. More preferably, the pants-type absorbent article according to any one of the above <33> to <35>, more preferably 15% to 25%.
<37>
The pants-type absorbent article according to any one of <33> to <36>, wherein the basis weight of the first region is the same in any part when viewed along the width direction of the absorbent main body.
<38>
The pants-type absorbent article according to any one of the above <33> to <37>, wherein the basis weight of the second region is the same at any part when viewed along the body width direction of the absorbent body. .

<39>
The basis weight of the first region is preferably 110% or more with respect to the basis weight of the second region, more preferably 120% or more, and preferably 400% or less, and 300% or less. The pants-type absorbent article according to any one of <33> to <38>, which is more preferably present.
<40>
The basis weight of the second region is preferably 100 g / m ² or more, more preferably 120 g / m ² or more, still more preferably 150 g / m ² or more, and 600 g / m ² or less. preferably there, further preferably 550 g / ^{m 2} or less, to a more preferable that the <33> to be at 500 g / ^{m 2} or less pant-type absorbent article according to any one of <39>.
<41>
The basis weight of the first region is preferably 150 g / m ² or more and 900 g / m ² or less, more preferably 180 g / m ² or more and 850 g / m ² or less, and 200 g / m ² or more and 800 g / m ^2. The pants-type absorbent article according to any one of the above <32> to <40>, which is more preferably as follows.
<42>
The absorbent core comprises hydrophilic fibers,
The pants-type absorption according to any one of <33> to <41>, wherein the basis weight of the hydrophilic fibers constituting the first region is higher than the basis weight of the hydrophilic fibers constituting the second region. Sex goods.
<43>
The absorbent core includes a water-absorbing polymer;
The pants-type absorption according to any one of <33> to <42>, wherein the basis weight of the water-absorbing polymer constituting the first region is higher than the basis weight of the water-absorbing polymer constituting the second region. Sex goods.

<44>
The pants-type absorption according to any one of <33> to <43>, wherein the basis weight of the second region on the ventral side and the basis weight of the second region on the back side are substantially the same. Sex goods.
<45>
The absorbent core comprises hydrophilic fibers and a water-absorbing polymer;
The basis weight of the hydrophilic fibers in the second region of the ventral side and the basis weight of the hydrophilic fibers in the second region of the back side are substantially the same,
Any one of the above <33> to <44>, wherein the basis weight of the water absorbent polymer in the second region of the ventral side and the basis weight of the water absorbent polymer in the second region of the back side are substantially the same. The pants-type absorbent article described in 1.
<46>
The underpants-type absorbent article according to any one of the above <33> to <45>, wherein the bending guide part group is absent on the dorsal side from the position of the stool excretion part of the wearer.
<47>
The underpants-type absorbent article according to any one of <33> to <46>, wherein the widths of the bending guide portions constituting the bending guide portion group are the same.
<48>
The width of each bending guide portion is preferably 1 mm or more, more preferably 3 mm or more, more preferably 20 mm or less, and even more preferably 15 mm or less <33> to <47 > The underpants type absorbent article of any one of>.

<49>
The underpants-type absorbent article according to any one of the above <33> to <48>, wherein the lengths of the side bending guide portions are the same.
<50>
The length of each side bending guide part is preferably 50 mm or more, more preferably 70 mm or more, more preferably 300 mm or less, and further preferably 250 mm or less <33> Thru | or the underpants type absorbent article of any one of <49>.
<51>
Any one of the above <33> to <50>, wherein the position of the end portion on the ventral side of each side bending guide portion is the same, and the position of the end portion on the back side is also the same The underpants type absorbent article as described.
<52>
The underpants-type absorbent article according to any one of the above <33> to <51>, wherein the distance between each side bending guide portion and the central bending guide portion is the same.
<53>
The underpants-type absorbent article according to any one of the above <33> to <52>, wherein the length of the central bending guiding portion is shorter than the length of each side bending guiding portion.

<54>
The length of the central bending guiding portion is preferably 20% or more of the length of the side bending guiding portion, more preferably 30% or more, and preferably 80% or less, 70 % Of the pants-type absorbent article according to any one of the above <33> to <54>.
<55>
<33> to <54>, wherein the position of one end portion of both end portions of the central bending guide portion is matched with the position of one end portion of both end portions of the side bending guide portion. The underpants type absorbent article according to any one of the above.
<56>
In the position closer to the ventral side, the position of the end closer to the ventral side of both ends of the central bending guide part is the position of the end closer to the ventral side of both ends of the side bending guide part. The pants-type absorbent article according to any one of <33> to <55>, which is matched with the position.
<57>
The pants-type absorbent article according to any one of <33> to <56>, wherein the absorbent core is composed of a single-layer structure.
<58>
The liquid-permeable sheet which covers this absorptive core is oppositely arranged on the skin opposing surface side and non-skin opposing surface side of an absorptive core,
A central folding guide portion is defined by the liquid-permeable sheet disposed oppositely and a space that is located between the liquid-permeable sheets and in which the constituent material of the absorbent core is absent. The underpants-type absorbent article according to any one of <33> to <57>.
<59>
Wherein one end of each bent guiding section, the end portion T ₁ of the dorsal sheet member side, the distance between the boundary position T ₂ of the second region and the first region of the absorbent core, or 5mm The pants-type absorbent article according to any one of <33> to <58>, which is 50 mm or less, particularly 10 mm or more and 45 mm or less.

<60>
The exterior body includes a ventral sheet member positioned on the ventral part and a dorsal sheet member positioned on the dorsal part,
The underpants-type absorbent article according to any one of <33> to <59>, wherein the absorbent main body is fixed across the two sheet members.
<61>
The underpants-type absorbent article according to <60>, wherein a rear body extending region extending further downward in the longitudinal direction is continuously provided from a lower end portion in the longitudinal direction of the back side sheet member.
<62>
A length extending portion in the outer layer sheet constituting the back-side sheet member along the body longitudinal direction X and L _1, the length along the body longitudinal direction X of the region overlapping the second region of the extending portion when the L _2, a ratio of _{L 2} for _{L 1 [L 2 / L 1} ] value of × 100 or more and 100% or 50% or less, especially 60% or more and 100% or less, the <60> or <61>.
<63>
The underpants-type absorbent article according to any one of the above <33> to <59>, wherein the exterior body is disposed from the abdominal side to the back side through the crotch.

<64>
Both ends in the longitudinal direction of the absorbent main body are covered with the exterior body and a belt-like sheet extending in the width direction separate from the exterior body, and the exterior body and the belt-like sheet are interposed via an adhesive. Fixed between
The pants-type absorbent article according to any one of <1> to <63>, wherein the application amount of the adhesive on the back side portion is smaller than the application amount of the adhesive on the abdominal side portion.

<65>
Each said adhesive agent is an underpants type absorbent article as described in said <64> currently straddled across the edge part edge of the longitudinal direction of the said absorptive main body.
<66>
The pants-type absorbent article according to <64> or <65>, in which the adhesive on the back side portion has a lower application area than the application area of the adhesive on the abdominal side portion.
<67>
The application area of the adhesive on the dorsal side is preferably 2/25 or more, more preferably 2/15 or more of the application area of the adhesive on the ventral part, and the application area of the adhesive on the ventral part. The pants-type absorbent article according to any one of the above <64> to <66>, which is preferably 4/5 or less, more preferably 2/3 or less.
<68>
The application area of the adhesive on the back side is preferably 1 cm ² or more and 60 cm ² or less, more preferably 3 cm ² or more and 40 cm ² or less, and the application area of the adhesive on the ventral side is , preferably at 5 cm ² or more 80 cm ² or less, still more preferably 8 cm ² or more 60cm ² or less, the <64> to pant-type absorbent article according to any one of <67>.
<69>
The application amount of the adhesive on the back side is 2/25 or more and 4/5 or less of the application amount of the adhesive on the abdominal side, and the application amount of the adhesive on the back side is 2 g / m ² or more. a is 10 g / ^{m 2} or less, pant-type absorbent according to any one of from the coating amount of the adhesive of the ventral said <64> not be 5 g / ^{m 2} or more 25 g / ^{m 2} or less <68> Sex goods.
<70>
The application amount of the adhesive on the dorsal side is preferably 2/25 or more, more preferably 2/15 or more of the application amount of the adhesive on the abdominal side, and the application amount of the adhesive on the abdominal side. The pants-type absorbent article according to any one of the above items <64> to <69>, preferably 4/5 or less, more preferably 2/3 or less.
<71>
The application amount of the adhesive on the back side is preferably 2 g / m ² or more and 10 g / m ² or less, more preferably 2 g / m ² or more and 5 g / m ² or less, and the ventral part. The application amount of the adhesive is preferably 5 g / m ² or more and 25 g / m ² or less, more preferably 5 g / m ² or more and 15 g / m ² or less. The underpants type absorbent article according to any one of the above.
<72>
<64> thru | or <71> that the absorptive core which comprises the said absorber on the back side part side has a low basic weight compared with the basic weight of the absorptive core which comprises the said absorber on the ventral part side. The underpants type absorbent article according to any one of the above.
<73>
As for the absorptive core which comprises the said absorber, it is preferable that the basic weight of the back side part side is 10% or more and 75% or less of the basic weight of the ventral part side, and 20% of the basic weight of the ventral part side. The pants-type absorbent article according to any one of <64> to <72>, more preferably 65% or less.
<74>
The basis weight of the absorbent core constituting the absorber on the back side is preferably 50 g / m ² or more and 500 g / m ² or less, and more preferably 75 g / m ² or more and 400 g / m ² or less. Preferably, the basis weight of the absorbent core constituting the absorber on the ventral side is preferably 150 g / m ² or more and 900 g / m ² or less, and 200 g / m ² or more and 800 g / m ² or less. The pants-type absorbent article according to any one of <64> to <73>, which is more preferably present.

<75>
Any of <64> to <74>, wherein the content of the absorbent polymer constituting the absorber on the dorsal side is smaller than the content of the absorbent polymer constituting the absorber on the ventral side. A pants-type absorbent article according to claim 1.
<76>
The content of the absorbent polymer constituting the absorber on the dorsal side is preferably 10% or more and 75% or less of the content of the absorbent polymer constituting the absorber on the ventral side. The pants-type absorbent article according to any one of <64> to <75>, wherein the content of the absorbent polymer constituting the absorbent on the side portion side is more preferably 20% to 65%.
<77>
The content of the absorbent polymer constituting the absorber on the back side is preferably 50 g / m ² or more and 250 g / m ² or less, and more preferably 75 g / m ² or more and 200 g / m ² or less. Preferably, the content of the absorbent polymer constituting the absorbent on the ventral side is preferably 100 g / m ² or more and 500 g / m ² or less, and 150 g / m ² or more and 400 g / m ² or less. The pants-type absorbent article according to any one of the above items <64> to <76>, more preferably.
<78>
The absorptive core constituting the absorbent body has a thickness on the dorsal side smaller than that on the ventral side,
The absorbent core constituting the absorbent body preferably has a back side portion thickness of 10% to 75% of the ventral side thickness, and 15% to 50% of the ventral side thickness. The pants-type absorbent article according to any one of the above items <64> to <77>, which is more preferably as follows.
<79>
The thickness of the absorbent core constituting the absorber on the back side portion side is preferably 0.5 mm or more and 6 mm or less, more preferably 1 mm or more and 5 mm or less, and the absorber on the ventral side portion side. Preferably, the thickness of the absorbent core constituting the pants-type absorption according to any one of the above <64> to <78> is preferably 1 mm to 9 mm, and more preferably 2 mm to 7.5 mm. Sex goods.
<80>
The absorbent core that constitutes the absorbent body has a density on the back side that is smaller than the density on the ventral side,
The absorbent core constituting the absorbent body preferably has a back side density of 10% to 75% of the density on the ventral side, and 20% to 65% of the density on the ventral side. The pants-type absorbent article according to any one of the above items <64> to <79>, which is more preferably as follows.
<81>
The density of the absorbent core constituting the absorber on the back side is preferably 0.01 g / cm ³ or more and 0.75 g / cm ³ or less, and 0.03 g / cm ³ or more and 0.55 g / cm. ³ or less, and the density of the absorbent core constituting the absorbent on the ventral side is preferably 0.1 g / cm ³ or more and 1 g / cm ³ or less, 0.15 g The pants-type absorbent article according to any one of <64> to <80>, more preferably / cm ³ or more and 0.8 g / cm ³ or less.
<82>
The width of the belt-like sheet (the length in the X direction) is preferably 10% or more and 60% or less, and preferably 15% or more and 50% or less with respect to the length in the width direction (X direction) of the exterior body. The pants-type absorbent article according to any one of the above items <64> to <81>, more preferably.
<83>
Any of the above <64> to <82>, wherein the thickness of each application line that draws the spiral of the adhesive on the back side is thinner than the thickness of the application line that draws the spiral of the adhesive on the ventral side A pants-type absorbent article according to claim 1.
<84>
Any one of the above items <64> to <83>, wherein the number of application lines that draw the spiral of the adhesive on the back side is smaller than the number of application lines that draw the spiral of the adhesive on the ventral side The pants-type absorbent article described in 1.
<85>
A pants-type absorbent article comprising an absorbent main body that is divided into an abdominal part, a back side part, and a crotch part including a vertically long absorbent body, and an exterior body that is fixed to the non-skin facing surface side of the absorbent main body Because
Both ends in the longitudinal direction of the absorbent main body are covered with the exterior body and a belt-like sheet extending in the lateral direction separately from the exterior body, and the exterior body and the belt-like sheet are interposed via an adhesive. Fixed between
The adhesive on the back side is an underpants type absorbent article in which the application amount is smaller than the application amount of the adhesive on the abdominal side.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Example 1]
In the present Example, the absorptive core 5 used for the pants-type disposable diaper shown in FIGS. 1 to 4 was manufactured using a known fiber stacking drum. The absorptive core 5 was made of a single layer structure having the configuration shown in FIG. The length of the absorbent core 5 was 390 mm and the width was 135 mm. The bending guide part was formed in three strips, each having a length of 200 mm and a width of 10 mm. The distance from the end part of the ventral part A to the end part of the bending guide part was 75 mm. The pitch between the central bending guiding portion and the side bending guiding portion was 26 mm. The length of the first region 41 including the ventral side portion A and the crotch portion C was 290 mm, and the length of the second region including the back side portion B was 100 mm. The basis weight of the pulp fibers in the first region 41 at 192 g / ^{m 2,} the basis weight of the water-absorbing polymer was 250 g / ^{m 2.} The basis weight of the pulp fiber in the second region 42 was 108 g / m ² , and the basis weight of the water-absorbing polymer was 132 g / m ² . The absorbent core 5 having this configuration was wrapped with a liquid permeable sheet (basis weight 16 g / m ² ) made of tissue paper to obtain an absorbent body.

[Example 2]
In the present example, the absorbent core 5 having a two-layer structure was manufactured using a known stacking drum. In the absorbent core 5, the first region 41 has a two-layer structure, and the second region 42 has a single-layer structure. Specifically, on the lower layer including the first region 41 and the second region 42, the upper layer including only the first region 41 was laminated to form the absorbent core 5 of this example. The basis weight and dimensions were the same as in Example 1. The absorbent core 5 was wrapped with the same tissue paper as in Example 1 to obtain an absorbent body.

Example 3
In the present Example, the absorptive core 5 used for the pants-type disposable diaper shown in FIGS. 1 to 4 was manufactured using a known fiber stacking drum. The absorptive core 5 was made of a single layer structure having the configuration shown in FIG. The length of the absorbent core 5 was 390 mm and the width was 135 mm. The bending guide part was formed in three strips, each having a length of 200 mm and a width of 10 mm. The distance from the end part of the ventral part A to the end part of the bending guide part was 75 mm. The pitch between the central bending guiding portion and the side bending guiding portion was 26 mm. The length of the first region 41 including the crotch portion C was 240 mm, the length of the second region including the back side portion B was 100 mm, and the length of the third region including the ventral side portion A was 50 mm. The basis weight of the pulp fibers in the first region 41 at 192 g / ^{m 2,} the basis weight of the water-absorbing polymer was 250 g / ^{m 2.} The basis weight of the pulp fiber in the second region 42 was 108 g / m ² , and the basis weight of the water-absorbing polymer was 132 g / m ² . The basis weight of the pulp fiber in the third region 43 was 140 g / m ² , and the basis weight of the water absorbent polymer was 170 g / m ² . The absorbent core 5 having this configuration was wrapped with a liquid permeable sheet (basis weight 16 g / m ² ) made of tissue paper to obtain an absorbent body.

Example 4
In this example, the absorbent core 5 having a three-layer structure was manufactured using a known stacking drum. In the absorbent core 5, the first region 41 has a three-layer structure, the third region 42 has a two-layer structure, and the second region 42 has a single-layer structure. Specifically, an intermediate layer including only the first region 41 and the third region 43 is stacked on the lower layer including the first region 41, the second region 42, and the third region 43, and the first region is formed on the intermediate layer. The upper layer containing only 41 was laminated to form the absorbent core 5 of this example. The basis weight and dimensions were the same as in Example 1. The absorbent core 5 was wrapped with the same tissue paper as in Example 1 to obtain an absorbent body.

[Comparative Example 1]
In this comparative example, an absorbent core having a single basis weight was produced, although it had the same bending guiding part group as in Example 1. The basis weight of the pulp fiber in the absorbent core was 168 g / m ² , and the basis weight of the water-absorbing polymer was 216 g / m ² . The absorbent core was wrapped with the same tissue paper as in Example 1 to obtain an absorbent body.

[Comparative Example 2]
This comparative example is an example in which the bending induction portion group is not formed in the absorbent core in the comparative example 1. Therefore, the absorbent core has a simple flat structure. The absorbent core was wrapped with the same tissue paper as in Example 1 to obtain an absorbent body.

[Comparative Example 3]
This comparative example is an example in which the bending guide part group was not formed in the absorbent core in Example 3. The absorbent core was wrapped with the same tissue paper as in Example 1 to obtain an absorbent body.

[Evaluation]
The underpants type disposable diaper of the form shown in FIG. 1 was manufactured using the absorber obtained by the Example and the comparative example. About this diaper, the difficulty of liquid leakage and the mounting pressure at the crotch were measured by the following methods. The results are shown in Table 1 below. Note that an air-through nonwoven fabric having a basis weight of 25 g / m ² was used as the top sheet of the diaper, and a polyethylene film having a basis weight of 18 g / m ² was used as the back sheet.

[Difficult to leak]
The diaper shown in FIG. 1 was cut at the position of the side seal portion S and developed into a flat shape. A diaper in an unfolded state with the topsheet facing upward was placed on a sloped base at an angle of 30 ° so that the ventral side was downward. Artificial urine was injected at 5 g / second every 5 minutes, and the number of times until the diaper could not hold the liquid was measured. The injection position was a position 130 mm inside from the end of the abdominal absorber toward the crotch side.

[Inseam pressure]
A diaper was attached to the walking model, and after standing and sitting for 1 minute, a total of 160 g of artificial urine was injected at 5 g / second. Next, the pressure of 40 mm front, 20 mm front, 20 mm rear, and 40 mm rear was measured and averaged based on the innermost side of the thigh of the stepped foot (right foot) after walking for 20 seconds. A mounting pressure measuring device will be described later.

As is apparent from the results shown in Table 1, it can be seen that the absorbents obtained in each Example have a large number of liquid injections until the liquid leaks and are difficult to leak. Moreover, even after absorbing the liquid, it can be seen that the mounting pressure is low and the mounting feeling is good.

Example 5
In the present Example, the absorptive core 5 used for the pants-type disposable diaper shown in FIGS. 1 to 4 was manufactured using a known fiber stacking drum. The absorptive core 5 was made of a single layer structure having the configuration shown in FIG. The length of the absorbent core 5 was 320 mm and the width was 120 mm. The bending guide part was formed in three strips, and the central bending part guide part had a length of 80 mm and a width of 10 mm. The side bent portion guiding portion has a length of 160 mm and a width of 10 mm. The positions of the end portion of the central bent portion guiding portion near the ventral side portion A and the end portion of the side bent portion guiding portion near the ventral side portion A were matched. This position was separated from the edge of the absorbent core near the ventral side A by 80 mm. The pitch between the central bending guiding portion and the side bending guiding portion was 22.5 mm. The length of the first region 41 including the ventral portion A was 194 mm, and the lengths of the ventral second region 42A and the dorsal second region 42B were both 63 mm. The basis weight of the pulp fiber in the first region 41 was 222 g / m ² , and the basis weight of the water absorbent polymer was 222 g / m ² . The basis weight of the pulp fibers in the second region 42 was 111 g / m ² , and the basis weight of the water-absorbing polymer was 111 g / m ² . The absorbent core 5 having this configuration was wrapped with a liquid permeable sheet (basis weight 16 g / m ² ) made of tissue paper to obtain an absorbent body.

[Comparative Example 4]
In this comparative example, an absorbent core having a single basis weight was produced, although it had the same bending guide group as in Example 5. The basis weight of the pulp fibers in the absorbent core was 178 g / m ² and the basis weight of the water-absorbing polymer was 178 g / m ² . The absorbent core was wrapped with the same tissue paper as in Example 5 to obtain an absorbent body.

[Comparative Example 5]
This comparative example is an example in which the central bending guide portion is not formed in the fifth embodiment. Otherwise, the absorbent core was obtained in the same manner as in Example 5. The absorbent core was wrapped with the same tissue paper as in Example 5 to obtain an absorbent body.

[Evaluation]
The underpants type disposable diaper of the form shown in FIG. 1 was manufactured using the absorber obtained by the Example and the comparative example. With respect to this diaper, the liquid absorption rate, the liquid diffusion area, and the crotch mounting pressure were measured by the following methods. The results are shown in Table 2 below.

[Liquid absorption rate]
The diaper shown in FIG. 1 was cut at the position of the side seal portion S and developed into a flat shape. An acrylic plate with a cylinder manufactured so as not to apply pressure to the inner diameter of 35 mm centering on the injection point was placed on the surface sheet in the diaper in a developed state with the surface sheet facing upward. On top of that, three 2 kg weights (total 6 kg) were arranged at equal intervals. In this state, the absorption time when 30 g of artificial urine was injected into the cylinder was measured. The injection point was 50 mm on the ventral side from the longitudinal center of the absorber. The shorter the absorption time, the faster the absorption speed and the higher the evaluation.

[Liquid diffusion area]
The above-described liquid injection of [Liquid Absorption Rate] was repeated three times at 10-minute intervals, and after injecting a total of 90 g, the area of the wetted portion of the topsheet was measured. The larger the area, the more efficiently the absorber is used and the higher the evaluation.

[Ventral wearing pressure]
In the state of a diaper, 120 g of artificial urine was absorbed collectively at a position 50 mm away from the ventral end of the absorber. Three minutes later, a diaper was attached to a cylinder having a circumferential length of 380 mm, and the attachment pressure on the absorber was measured with an attachment pressure measuring device (a contact pressure measuring instrument (AMI3037-2 manufactured by AIM Techno Co., Ltd.)). The specific measurement method is as follows. The lower the abdominal wearing pressure, the lower the abdominal pressure, and the higher the evaluation.

[Measurement method of ventral side pressure]
Using an air pack of φ = 15 mm, the air pack was inserted between the diaper and the cylinder, and the mounting pressure was measured. The center of the air pack is positioned approximately in the center between the left and right side edges of the diaper and the left and right side edges of the absorbent core in the diaper width direction, and in the diaper longitudinal direction, the center of the air pack is Set so that it is located at the center of the direction. The mounting force is measured on both the left and right sides of the abdominal side, and the average value of the two measured values in total is taken as the mounting pressure on the abdominal side.

As is clear from the results shown in Table 2, it can be seen that the absorbents obtained in the examples have a high liquid absorption rate. Moreover, it can be seen that the diffusion area of the liquid is large and the area of the absorbent core is effectively utilized. Further, it can be seen that the number of times of liquid injection until the liquid leakage occurs is large and the liquid leakage is difficult. Moreover, even after absorbing the liquid, it can be seen that the mounting pressure is low and the mounting feeling is good.

As described above in detail, according to the present invention, even when the excreted liquid is absorbed, the absorbent core is unlikely to swell locally, the liquid is evenly absorbed and hardly leaked, and the liquid is absorbed. Even if a feeling of wearing is not spoiled, a pants type absorbent article is provided.

Claims (48)

1. A vertically long absorbent main body including an absorbent core and an exterior body disposed on the non-skin facing surface side of the absorbent main body and fixed to the absorbent main body, and disposed on the stomach side of the wearer It has an abdominal part, a crotch part arranged in the crotch part, and a dorsal part arranged on the dorsal side, and is located in the exterior body ventral region and the back side part located in the abdominal side part of the exterior body A pants-type absorbent article in which both side edges along the longitudinal direction of the body of the exterior body back side region are joined to each other to form a waist opening and a pair of leg openings,
   The absorbent core has at least a first region and a second region having different basis weights, and the first region has a higher basis weight than the second region,
   The first region includes at least a crotch portion; the second region includes at least a dorsal side;
   The first region has a bending guide portion group composed of a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
   The bending guide part group consists of a central bending guide part located in the center region in the width direction of the absorbent core, and a pair of side bending guide parts located on both sides of the central bending guide part,
   The bending guide part group is located closer to the crotch than the lower end part of the exterior body located on the abdominal side part, and the pant type absorption in which the bending guide part group is absent on the back side part Sex goods.
2. The pants-type absorbent article according to claim 1, wherein the first region includes at least a ventral part and a crotch part.
3. The pants-type absorbent article according to claim 2, wherein the length of the first region is 50% or more and 90% or less of the entire length of the absorbent core.
4. The pants-type absorbent article according to any one of claims 1 to 3, wherein the basis weight of the first region is the same at any part when viewed along the width direction of the absorbent main body.
5. The pants-type absorbent article according to any one of claims 1 to 4, wherein when viewed along the width direction of the absorbent main body, the basis weight of the second region is the same at any part.
6. The pants-type absorbent article according to any one of claims 1 to 5, wherein the basis weight of the first region is 120% to 250% with respect to the basis weight of the second region.
7. A third region having a lower basis weight than the first region and a higher basis weight than the second region;
   The pants-type absorbent article according to any one of claims 1 to 6, wherein the third region includes at least a ventral part.
8. The pants-type absorbent article according to claim 7, wherein the basis weight of the third region is 105% or more and 200% or less with respect to the basis weight of the second region.
9. The pants-type absorbent article according to claim 7 or 8, wherein the basis weight of the third region is 50% to 95% with respect to the basis weight of the first region.
10. The pants-type absorbent article according to any one of claims 1 to 9, wherein the bending guide part group is absent on the back side from the position of the stool excretion part of the wearer.
11. The underpants type absorbent article according to any one of claims 1 to 10, wherein the widths of the bending guide portions constituting the bending guide portion group are the same.
12. The underpants type absorbent article according to any one of claims 1 to 11, wherein the lengths of the bending guide portions constituting the bending guide portion group are the same.
13. The pant-type absorbent article according to any one of claims 1 to 12, wherein the absorbent core is composed of a single-layer structure.
14. The liquid-permeable sheet which covers this absorptive core is oppositely arranged on the skin opposing surface side and non-skin opposing surface side of an absorptive core,
    A central folding guide portion is defined by the liquid-permeable sheet disposed oppositely and a space that is located between the liquid-permeable sheets and in which the constituent material of the absorbent core is absent. The underpants type absorbent article as described in any one of Claims 1 thru | or 13.
15. Wherein one end of each bent guiding section, the end portion T ₁ of the dorsal sheet member side, the distance between the boundary position T ₂ of the second region and the first region of the absorbent core, or 5mm The underpants-type absorbent article according to any one of claims 1 to 14, which is 50 mm or less, particularly 10 mm or more and 45 mm or less.
16. The exterior body includes a ventral sheet member positioned on the ventral part and a dorsal sheet member positioned on the dorsal part,
    The pants-type absorbent article according to any one of claims 1 to 15, wherein the absorbent main body is fixed over both sheet members.
17. The pants-type absorbent article according to claim 16, wherein a rear body extending region extending further downward in the longitudinal direction is continuously provided from a lower end portion in the longitudinal direction of the back side sheet member.
18. In the back body extension area, the extension part gather is formed by the extension area elastic member being fixed in the extended state between the outer layer sheet material and the inner layer sheet material. Pants-type absorbent article.
19. A length extending portion in the outer layer sheet constituting the year dorsal sheet member along the body longitudinal direction X and L _1, the length along the body longitudinal direction X of the region overlapping the second region of the extending portion when the L _2, a ratio of _{L 2} for _{L 1 [L 2 / L 1} ] value of × 100 or more and 100% or 50% or less, especially 60% to 100%, of the claims 16 to 18 The absorbent article as described in any one.
20. The pants-type absorbent article according to any one of claims 1 to 19, wherein the exterior body is arranged from the abdominal side to the back side through the crotch.
21. A vertically long absorbent main body including an absorbent core and an exterior body disposed on the non-skin facing surface side of the absorbent main body and fixed to the absorbent main body, and disposed on the stomach side of the wearer It has an abdominal part, a crotch part arranged in the crotch part, and a dorsal part arranged on the dorsal side, and is located in the exterior body ventral region and the back side part located in the abdominal side part of the exterior body A pants-type absorbent article in which both side edges along the longitudinal direction of the body of the exterior body back side region are joined to each other to form a waist opening and a pair of leg openings,
    The absorbent core has at least a first region and a second region having different basis weights, and the first region has a higher basis weight than the second region,
    The first region includes at least a crotch portion, the second region includes at least a ventral portion and a dorsal portion,
    The first region has a bending guide portion group composed of a plurality of bending guide portions extending in the longitudinal direction of the absorbent core.
    The bending guide part group consists of a central bending guide part located in the center region in the width direction of the absorbent core, and a pair of side bending guide parts located on both sides of the central bending guide part,
    The bending guide part group is located closer to the crotch than the lower end part of the exterior body located on the abdominal side part, and the pant type absorption in which the bending guide part group is absent on the back side part Sex goods.
22. The pants-type absorbent article according to claim 21, wherein the length of the first region is 40% to 80% of the entire length of the absorbent core.
23. The pants-type absorbent article according to claim 21 or 22, wherein when viewed along the width direction of the absorbent main body, the basis weight of the first region is the same in any part.
24. The pants-type absorbent article according to any one of claims 21 to 23, wherein the basis weight of the second region is the same at any part when viewed along the main body width direction of the absorbent main body.
25. The pants-type absorbent article according to any one of claims 21 to 24, wherein the basis weight of the second region of the ventral side and the basis weight of the second region of the back side are substantially the same. .
26. 26. The pant-type absorbent article according to any one of claims 21 to 25, wherein the bending guide part group is absent on the dorsal side from the position of the stool excretion part of the wearer.
27. 27. The pant-type absorbent article according to any one of claims 21 to 26, wherein the widths of the bending guide portions constituting the bending guide portion group are the same.
28. The pants-type absorbent article according to any one of claims 21 to 27, wherein the lengths of the respective side bending guide portions are the same.
29. 29. The pants-type absorbent article according to any one of claims 21 to 28, wherein a length of the central bending guide portion is shorter than a length of each side bending guide portion.
30. 30. The position according to any one of claims 21 to 29, wherein a position of one end portion of both end portions of the central bending guide portion is matched with a position of one end portion of both end portions of the side bending guide portion. The pants-type absorbent article according to Item.
31. In the position closer to the ventral side, the position of the end closer to the ventral side of both ends of the central bending guide part is the position of the end closer to the ventral side of both ends of the side bending guide part. The pants-type absorbent article according to any one of claims 21 to 30, wherein the pants-type absorbent article is matched with a position.
32. The pants-type absorbent article according to any one of claims 21 to 31, wherein the absorbent core is composed of a single-layer structure.
33. The liquid-permeable sheet which covers this absorptive core is oppositely arranged on the skin opposing surface side and non-skin opposing surface side of an absorptive core,
    A central folding guide portion is defined by the liquid-permeable sheet disposed oppositely and a space that is located between the liquid-permeable sheets and in which the constituent material of the absorbent core is absent. The pants-type absorbent article according to any one of claims 21 to 32.
34. Wherein one end of each bent guiding section, the end portion T ₁ of the dorsal sheet member side, the distance between the boundary position T ₂ of the second region and the first region of the absorbent core, or 5mm The pants-type absorbent article according to any one of claims 21 to 33, which is 50 mm or less, particularly 10 mm or more and 45 mm or less.
35. The exterior body includes a ventral sheet member positioned on the ventral part and a dorsal sheet member positioned on the dorsal part,
    The pants-type absorbent article according to any one of claims 21 to 34, wherein the absorbent main body is fixed across the two sheet members.
36. 36. The pant-type absorbent article according to claim 35, wherein a rear body extension region extending further downward in the longitudinal direction is continuously provided from a lower end portion in the longitudinal direction of the back side sheet member.
37. A length extending portion in the outer layer sheet constituting the back-side sheet member along the body longitudinal direction X and L _1, the length along the body longitudinal direction X of the region overlapping the second region of the extending portion when the L _2, a ratio of _{L 2} for _{L 1 [L 2 / L 1} ] value of × 100 or more and 100% or 50% or less, is 100% or less especially 60% to claim 35 or 36 The absorbent article as described.
38. The underpants-type absorbent article according to any one of claims 21 to 37, wherein the exterior body is disposed from the abdominal side to the back side through the crotch.
39. Both ends in the longitudinal direction of the absorbent main body are covered with the exterior body and a belt-like sheet extending in the width direction separate from the exterior body, and the exterior body and the belt-like sheet are interposed via an adhesive. Fixed between
    The pants-type absorbent article according to any one of claims 1 to 38, wherein the amount of the adhesive in the dorsal region is smaller than the amount of the adhesive in the ventral region.
40. 40. The pants-type absorbent article according to claim 39, wherein each of the adhesives is applied across an end edge in a longitudinal direction of the absorbent main body.
41. 41. The pants-type absorbent article according to claim 39 or 40, wherein the application area of the adhesive on the back side is lower than the application area of the adhesive on the abdominal side.
42. The pants-type absorption according to any one of claims 39 to 41, wherein an application area of the adhesive on the back side is 2/25 or more and 4/5 of an application area of the adhesive on the abdominal side. Sex goods.
43. The application area of the adhesive on the back side is 1 cm ² or more and 60 cm ² or less,
    43. The pant-type absorbent article according to any one of claims 39 to 42, wherein an application area of the adhesive on the stomach side is 5 cm ² or more and 80 cm ² or less.
44. 44. The pant-type absorption according to any one of claims 39 to 43, wherein an application amount of the adhesive on the back side is 2/25 or more and 4/5 or less of an application amount of the adhesive on the abdominal side. Sex goods.
45. The application amount of the adhesive on the back side is 2 g / m ² or more and 10 g / m ² or less,
    45. The pant-type absorbent article according to any one of claims 39 to 44, wherein an application amount of the adhesive on the ventral part is 5 g / m ² or more and 25 g / m ² or less.
46. The pants-type absorbent article according to any one of claims 39 to 45, wherein a width of the belt-like sheet is 10% or more and 60% or less with respect to a length in a width direction of the exterior body.
47. 47. The thickness of each application line that describes the spiral of the adhesive on the dorsal side is thinner than the thickness of the application line that describes the spiral of the adhesive on the ventral side. The pants-type absorbent article described in 1.
48. 48. The number of application lines that draw the spiral of the adhesive on the dorsal side is less than the number of application lines that draw the spiral of the adhesive on the ventral side. Pants-type absorbent article.

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