JP3638094B2 - Absorbent article with leak-proof cuff - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable absorbent article such as a disposable diaper, a urine-absorbing pad, and a sanitary napkin having a leak-proof cuff having an excellent leakage prevention function.
[0002]
[Prior art]
In recent years, absorbent articles such as disposable diapers have been widely used. FIG. 10 shows a partial sectional view of a side portion of a conventional disposable diaper. The disposable diaper includes a liquid-permeable top sheet 110 directed toward the wearer, a liquid-impermeable back sheet 111 directed outward, and an absorption sandwiched between the top sheet 110 and the back sheet 111. The core 112 is comprised. When the wearer of the diaper excretes, the excrement is absorbed by the absorption core 112. However, if a large amount of excretion is performed at once, excretion that cannot be absorbed by the absorption core 112 moves in the width direction (X direction). To do. A leak-proof cuff 140 is provided to prevent the excrement from leaking out of the diaper from the side of the diaper (i.e., the portion that hits the wearer's leg). The leak-proof cuff 140 is formed by a hydrophobic sheet 114, and an elastic member 130 is provided on one side edge (free end portion 140a), and the opposite side edge is fixed to the top sheet 110 to be a fixed edge portion. 140b. As a result, a leak-proof cuff that rises toward the wearer is formed.
[0003]
The applicant of the present invention has researched and developed such a leak-proof cuff, and discloses a disposable wearing article provided with a double leak-proof cuff in JP-A-4-218159. Japanese Patent Application Laid-Open No. 8-215239 discloses a disposable body fluid treatment article in which a leak-proof cuff is folded in a zigzag shape and a pocket opening toward the inside is formed.
[0004]
[Problems to be solved by the invention]
However, since excrement such as urine and loose stool has a high flow rate, it is difficult to dam the excrement with the leak-proof cuff when the discharge amount is large or the discharge rate is high. Therefore, the appearance of a leak-proof cuff that can effectively prevent any form of excrement from leaking is strongly desired.
[0005]
On the other hand, in order to increase the leak prevention effect, the wearer's elastic member of the leakproof cuff is strengthened so that the wearer's suspension is closed tightly, or multiple leakproof cuffs are provided. In addition to feeling uncomfortable, the area of the diaper that hits the skin of the wearer increases, and it is easy to cause skin irritation due to friction. Further, in this case, air circulation in the gathered portion is also deteriorated, so that stuffiness and rash are likely to occur.
[0006]
This invention is for solving the said subject, and is providing the absorbent article which has the leak-proof cuff provided with the outstanding leak prevention function.
[0007]
It is a further object of the present invention to provide an absorbent article that has an excellent leak prevention function and is less likely to cause the wearer's skin to be rashed or roughened.
[0008]
[Means for Solving the Problems]
The object of the present invention is to provide a main body having a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core sandwiched between the top sheet and the back sheet, and In the absorbent article having a pair of leak-proof cuffs extending in the longitudinal direction of the main body on the liquid receiving side of the main body and disposed on both sides in the width direction orthogonal to the longitudinal direction,
The pair of leak-proof cuffs has one edge fixed to the main body as a fixed edge and the other edge is a free edge. The free edge generates a stretching force in the longitudinal direction to prevent the leakage. A first elastic member is provided for erecting the leakage cuff;
Between the fixed edge and the free edge of the leak-proof cuff, a flap is formed by folding a sheet constituting the leak-proof cuff and joining the folded inner surface thereof toward the center in the width direction of the main body. This is achieved by an absorbent article characterized by being formed to protrude.
[0009]
In the absorbent article of the present invention, the flap protrudes toward the center in the width direction, and the substantial distance from the fixed end to the free end of the leak-proof cuff is long, so that it can be absorbed by the absorbent core at the excretion position. While the excrement having a high flow rate does not flow in the width direction and tries to get over the leak-proof cuff, the speed of the excrement becomes slow due to the presence of the flap, and the excrement leakage can be effectively prevented. In addition, when the absorbent article of the present invention is worn, the free end portions of the leak-proof cuff and the flap come into contact with the skin, and the contact area with the skin of the diaper is small, that is, the wearer's skin is less rubbed. Further, a gap is formed between the leak-proof cuff and the skin. However, in the present invention, a gap is formed between the skin and the skin near the fixed end portion of each flap. Therefore, the occurrence of stuffiness or rash can be suppressed.
[0010]
It is preferable that the flap is formed so as to protrude from the leak-proof cuff both on the center side in the width direction of the main body and on the outer side in the width direction.
[0011]
Two flaps are provided from the leak-proof cuff on the center side in the width direction of the main body to form second and third flaps, and both the two flaps preferably extend in the longitudinal direction of the main body. . In this case, the second and third flaps are joined to each other with a gap in the longitudinal direction of the main body, and a pocket is formed by the second and third flaps between the joined portions by the joining. preferable. Moreover, it is preferable that the flap protrudes outward in the width direction of the leak-proof cuff to form an outward flap in the middle of the second and third flaps.
[0012]
In this invention, it is preferable that the protrusion length from the leak-proof cuff of the said flap is 5 mm or more and 10 mm or less. In addition, when a plurality of the flaps are provided in the leak-proof cuff, it is preferable that the interval is 10 mm or more and 15 mm or less at a portion where the interval between the second and third flaps is the farthest.
[0013]
The free end of each flap is provided with an elastic member that exerts a stretching force in the longitudinal direction of the main body, and the first elastic member contracts when the main body is expanded so that the longitudinal direction is a plane. The tension is preferably larger than the elastic tension of the elastic member provided in each flap.
[0014]
The present invention also provides a main body having a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core sandwiched between the top sheet and the back sheet, and the main body In the absorbent article having a pair of leak-proof cuffs extending in the longitudinal direction of the main body on the liquid receiving side and disposed on both sides in the width direction orthogonal to the longitudinal direction,
The pair of leak-proof cuffs has one edge fixed to the main body as a fixed edge and the other edge is a free edge. The free edge generates a stretching force in the longitudinal direction to prevent the leakage. A first elastic member is provided for erecting the leakage cuff;
The leak-proof cuff is corrugated between the fixed edge and the free edge, and the vertices of two waves directed toward the center in the width direction of the main body are joined at an interval in the longitudinal direction. And
The absorbent article is characterized in that a pocket is formed between the two corrugations between the joints formed by the joining. In this case, since excrement is held in the pocket, leakage can be effectively prevented.
[0015]
At this time, an elastic member that exerts a stretching force in the longitudinal direction of the main body is provided at the apex of the waveform, and the contraction tension of the first elastic member when the main body is expanded so that the longitudinal direction is a plane is provided. It is preferable that it is larger than the elastic tension of the elastic member provided at the top of the waveform.
[0016]
Furthermore, in the present invention, it is preferable that the opening length in the longitudinal direction of the pocket formed between the joint portions is 5 mm or more and 20 mm or less.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a disposable diaper will be described as an example of the absorbent article of the present invention with reference to the drawings. 1 is a plan view showing the disposable diaper of the present invention from the liquid-permeable sheet side, FIG. 2 is a cross-sectional view taken along the line II-II of the diaper shown in FIG. 1, and FIG. 3 is III-III of the diaper shown in FIG. FIG. 4 is a partial cross-sectional view for explaining the state at the end of the leak-proof cuff.
[0018]
A disposable diaper 1 of the present invention shown in FIG. 1 is a so-called hourglass-shaped open-type diaper. The front part 2A is applied to the abdomen of the wearer during use, and the back part 2C is applied to the buttocks and / or back during use. And an intermediate portion 2B applied to the crotch portion during use. A direction from the front surface portion through the crotch to the rear surface portion is defined as a Y direction (longitudinal direction or longitudinal direction), and a direction orthogonal thereto is defined as an X direction (width direction). Moreover, as shown in FIG.2 and FIG.3, let the direction which goes to a wearer side be a Z direction.
[0019]
The disposable diaper 1 includes a liquid-permeable top sheet 10 directed toward the liquid receiving side of the wearer, a liquid-impervious back sheet 11 directed outward, and the top sheet 10 and the back sheet 11. It is comprised with the absorption core 12 slightly smaller than those sheets sandwiched. Each of the top sheet 10, the back sheet 11, and the absorbent core 12 has an hourglass shape. The top sheet 10 and the back sheet 11 are joined to each other around the absorbent core 12 by a hot melt adhesive or the like.
[0020]
At the time of mounting, the rear flaps (portions protruding in the X direction) of the back surface portion 2C are superimposed on the back sheet 11 of the front surface portion 2A, and are provided on both edges of the top sheet 10 of the back flap of the back surface portion 2C. The latching sheet 17 is latched on the backsheet side of the front surface portion 2A. As a result, the disposable diaper 1 is held and fixed around the waist of the wearer.
[0021]
The top sheet 10 is formed of hydrophobic fibers, hydrophilic fibers, and the like that have been subjected to hydrophilic treatment, such as point bonds, air throughs, spun bonds, and spun lace nonwoven fabrics. Alternatively, a top sheet may be formed by stacking a cushion layer made of a bulky nonwoven fabric on the nonwoven fabric. The back sheet 11 is liquid-impermeable and breathable, and is formed of, for example, a polyolefin-based resin sheet. Alternatively, a non-woven fabric may be used as the back sheet, and a waterproof film may be interposed between the back sheet and the absorbent core. Moreover, when using it piled up on another absorbent article, you may be formed with the liquid-permeable sheet.
[0022]
The absorbent core 12 is formed of an absorbent material such as pulverized pulp or a mixture of pulverized pulp and a superabsorbent polymer, and the pulverized pulp or a mixture of pulverized pulp and a superabsorbent polymer is wrapped with an absorbent sheet 13 such as a tissue. It is rare. The latching sheet 17 is an adhesive tape such as a rubber adhesive or acrylic resin. In addition, a resin film is preferably provided at a corresponding position on the back sheet 11 side of the front flap so that the latching sheet 17 can be repeatedly bonded and peeled even after being bonded once. However, a hook-like tape may be used for hooking around the waist.
[0023]
Folded strip-like hydrophobic sheets 14 and 14 are provided symmetrically with respect to the center line L1 on both sides 4 and 4 on the top sheet 10 of the diaper 1. The hydrophobic sheet 14 forms a leak-proof cuff 40A for preventing side leakage as shown in FIG. In the leak-proof cuff 40A, the hydrophobic sheet 14 is fixed on the top sheet 10 on the side portion 4 side, and a fixed end portion 20b serving as a standing fulcrum of the leak-proof cuff 40A is formed. On the other hand, at the free end 20a on the opposite side (center line L1 side) of the hydrophobic sheet 14, the elastic member 30 is provided in an extended state over almost the entire length in the Y direction. The front and rear end portions 14A and 14C (end portions in the Y direction) of the hydrophobic sheet 14 are fixed on the top sheet 10 with the free end portion 20a tilted toward the center line L1. As a result, the disposable diaper 1 bends in a U-shape, the free end 20a rises in the wearer direction (Z direction), and a pair of leak-proof cuffs 40A for preventing side leakage are formed. The free end portion 20a may be fixed on the top sheet 10 by tilting to the side portion 4 side.
[0024]
The leak-proof cuff 40A has second and third flaps formed by folding the hydrophobic sheet 14 constituting the leak-proof cuff 40A and joining the folded inner surfaces. First, between the free end 20a and the fixed end 20b of the leak-proof cuff 40A, the hydrophobic sheet 14 is projected in the X direction on the center line L1 side with a predetermined distance 20h from the free end 20a, and the second The flap 21 is formed. The base of the second flap 21 is a fixed end 21b, and the opposite side (center line L1 side) is a free end 21a. The free end 21a is provided with an elastic member 31 over almost the entire length in the Y direction. At this time, in order to securely form the flap and not to impair the air permeability in the flap, the hydrophobic sheets 14 at the fixed end 21b are joined together along the fixed end 21b and are free to fix the elastic member 31. It is preferable to join along the end 21a, and not between the fixed end 21b and the free end 21a. However, the hydrophobic sheets may be joined from the fixed end 21b to the free end 21a.
[0025]
Similarly, between the second flap 21 and the fixed end portion 20b of the leak-proof cuff 40A, a predetermined interval 21h is provided from the fixed end portion 21b (at a predetermined interval 22h from the fixed end portion 20b), and the hydrophobicity. The third flap 22 is formed by projecting the adhesive sheet 14 in the X direction on the center line L1 side. Similar to the second flap 21, the free end 22a is provided with an elastic member 32 over almost the entire length in the Y direction.
[0026]
The elastic tensions of the elastic members 31 and 32 provided on the second and third flaps are the elasticity provided on the free end 20a of the leak-proof cuff 40A when the diaper 1 is expanded so that the Y direction is a plane. It is preferably smaller than the expansion / contraction tension of the member 30. For example, when the elastic member 30 provided at the free end 20a of the leak-proof cuff 40A is 1120 denier, the expansion / contraction tension at 200% elongation is preferably 100 g or less, while the elastic member 31 of each flap, When each 32 is 840 denier, the stretching tension at 200% elongation is preferably 80 g or less. In this way, the leak-proof cuff 40A can be reliably raised in the Z direction. Moreover, each elastic member fits by moderate strength, without tightening with respect to a wearer.
[0027]
The formation positions of the second and third flaps 21 and 22 are preferably 20 h = 10 to 15 mm, 21 h = 10 to 15 mm, and 22 h = 5 to 10 mm. Moreover, it is preferable that the protrusion width 21w to the X direction of the 2nd and 3rd flaps 21 and 22 is 5-15 mm. And it is preferable that the height 40h of the leak-proof cuff 40A finally obtained is about 25 to 40 mm. Under such conditions, only the leakproof cuff and the free end of each flap come into contact with the wearer when the diaper is worn.
[0028]
The second and third flaps are formed over substantially the entire length of the hydrophobic sheet 14 along the Y direction, but in the hatched area shown in FIG. 1, the free ends of the second and third flaps On the 21a, 22a side, the second and third flaps are preferably joined together. That is, in the region 45, as shown in FIG. 3, the free end portions 21a and 22a of the second and third flaps positioned up and down are joined by hot melt adhesive, heat fusion by ultrasonic waves or heating. ing.
[0029]
In this way, when the free ends of the second and third flaps are joined to each other along the Y direction, the flaps 21 and 22 are formed in the absorbent core 12 in the unjoined region as shown in FIG. The free end portions 21a and 22a of the flaps 21 and 22 face each other inward as the region 45 is approached. As a result, a pocket 41 as shown in FIG. 2 is formed in a region where the free ends are not joined. Since the excrement is held in the pocket 41, the excrement is unlikely to leak out of the diaper over the leak-proof cuff.
[0030]
At this time, in order to surely form the pocket 41, the bonding width 45w in the X direction in the region 45 is preferably 3 to 5 mm. In addition, in order for the pocket 41 to fully extract the function for holding excrement, the joining length 45d of the region 45 in the Y direction is the interval between adjacent joining regions (the length of the non-joining region in the Y direction). It is preferable that it is 46 or less. In addition, it is preferable that the space | interval of adjacent joining area | regions, ie, the opening length 46 of the pocket 41, is 5-20 mm.
[0031]
Furthermore, between the second and third flaps, the X direction on the opposite side (outside of the diaper) of the second flap 21 and the third flap 22 on the opposite side (outside of the diaper) An outwardly facing flap 25 is preferably formed. Like the second and third flaps 21 and 22, it extends from the fixed end 25b to the free end 25a, and its protruding width is preferably 5 to 15 mm, similar to the protruding width of the second and third flaps. It is. An elastic member 35 is provided at the free end 25a. By providing the outward flap 25 as described above, a balance is established in the relationship between the second and third flaps 21 and 22 protruding to the opposite side, and thus the standing property of the leak-proof cuff 40A is further enhanced. In this case, the shape of the pocket 41 is a preferable shape for holding excrement.
[0032]
Note that all of the leak-proof cuff 40A including the second and third flaps are joined to the top sheet 10 at the front and rear end portions 14A and 14C of the hydrophobic sheet 14. At this time, if the hydrophobic sheet 14 is folded and joined in the state shown in FIG. 4, the manufacturing process is simple, and the leak-proof cuff 40A is likely to rise in the Z direction when attached.
[0033]
The hydrophobic sheet 14 forming the leak-proof cuff 40A is preferably breathable. For example, a non-woven fabric made of hydrophobic fibers, such as a spunbonded non-woven fabric made of polypropylene fiber, or a sheet of spunbond non-woven fabric, meltblown non-woven fabric and spunbond non-woven fabric, or a liquid-impervious resin sheet, etc. Can be done. If the hydrophobic sheet 14 is thermoplastic, it is convenient because each flap can be formed by heat treatment or ultrasonic treatment.
[0034]
Further, elastic members 39 extending in the longitudinal direction (Y direction) of the disposable diaper 1 are bonded and fixed between the hydrophobic sheet 14 and the back sheet 11 at the side portion 4 of the disposable diaper 1. When the elastic members 39 are elastically contracted in the Y direction, the top sheet 10 and the back sheet 11 are contracted in both side regions of the disposable diaper 1 in the X direction, and a leg cuff that fits around the suspension is formed. Instead of the hydrophobic sheet 14, the top sheet 10 can be extended in the direction of the side portion 4, and an elastic member can be bonded and fixed between the top sheet 10 and the back sheet 11.
[0035]
Next, another embodiment of the present invention will be described with a specific example. 5, FIG. 6, FIG. 7, and FIG. 8 are partially enlarged cross-sectional views showing other embodiments of the leakproof cuff of the absorbent article of the present invention. FIG. 9 is a partially enlarged sectional view showing a joining state of the leak-proof cuff of FIG.
[0036]
In FIG. 5, the second flap 21 and the third flap 22 are provided in the leak-proof cuff 40 </ b> B. However, the outward flap as shown in the leak-proof cuff 40A of FIGS. 1 to 3 is not provided. Even in such a case, the leak-proof cuff 40B can stand in the direction of the wearer, and excrement can be held in the pocket.
[0037]
Moreover, as shown in the leak-proof cuff 40C of FIG. 6, the elastic member does not need to be provided in the free end part of the flap. In this case, since the second flap 21 and the third flap 22 are difficult to protrude in the X direction in parallel with the absorbent core 12, for example, as described in FIG. 1 and FIG. It is preferable that the 2nd flap 21 and the 3rd flap 22 are joined in the free end parts 21a and 22a side. Even if an elastic member is not provided at the free end, a pocket for holding excrement can be formed by joining in this way.
[0038]
Further, as shown in the leak-proof cuff 40D of FIG. 7, the third flap 22 can be formed of a sheet 14b different from the hydrophobic sheet 14a forming the second flap 21. In this case, it is preferable to join from the fixed end 20b of the leak-proof cuff 40D to the fixed end 22b of the third flap 22. At this time, the third flap may not be a hydrophobic sheet. In this way, each flap can be formed of a separate sheet and combined to form a leak-proof cuff.
[0039]
Moreover, in the leak-proof cuff of FIG. 8, it has a waveform from the fixed end 20b to the free end 20a. The third flap 22 is provided by providing an elastic member 32 at a position spaced from the fixed end 20b, and the outward flap is further provided by providing an elastic member 35 at a position further spaced apart. The second flaps 21 are formed by providing the elastic members 31 at the respective positions. Then, the free end portion 21a of the second flap and the free end portion 22a of the third flap, that is, the vertices of two waves directed toward the center in the width direction, as shown in FIG. Joined at intervals. As a result, a pocket for holding excrement is formed between the joint portions.
[0040]
When the flap is formed without joining the inner surfaces of the hydrophobic sheet 14 as in the leak-proof cuff 40E, the second flap 21 and the third flap 22 are parallel to the absorbent core 12 in the X direction. Since it is difficult to project, for example, as described with reference to FIGS. 1 and 3, it is preferable that the second flap 21 and the third flap 22 are joined to the free end portions 21a and 22a at predetermined intervals in the Y direction.
[0041]
In addition, in addition to the second and third flaps, the leak-proof cuff of the absorbent article of the present invention may further include fourth and fifth flaps. In addition, a leak-proof cuff may be formed by combining a flap formed by bonding a hydrophobic sheet and a flap formed without bonding. Moreover, each flap does not need to be provided over the entire longitudinal direction of the leak-proof cuff, and the elastic member provided in each flap need not be provided over the entire longitudinal direction of the leak-proof cuff.
[0042]
In addition, the leak-proof cuff provided in the absorbent article of the present invention is not limited to the hourglass-shaped open disposable diaper, but may be a rectangular open disposable diaper or a disposable diaper previously formed in a pants shape. In addition, the present invention can also be applied to absorbent articles such as sanitary products and urine collection pads.
[0043]
【The invention's effect】
As described above in detail, in the absorbent article of the present invention, the flow rate of excrement can be slowed by the presence of the flap of the leak-proof cuff, so the excrement leaks over the leak-proof cuff and leaks out of the diaper. Can be prevented. In addition, when the absorbent article of the present invention is worn, the free end portion of the leak-proof cuff and the free end portion of the flap come into contact with the skin, and the contact area with the skin of the diaper is small. Less is enough. Furthermore, since a gap is formed between the flap and the skin in the vicinity of the fixed end of each flap, air is easily circulated, and the occurrence of stuffiness or rash can be suppressed. Therefore, discomfort at the time of wearing can be reduced.
[0044]
Furthermore, since the pocket is formed by intermittently joining the free end portions of the flaps positioned above and below, the excrement can be held in the pocket when it flows laterally. As a result, leakage is less likely to occur.
[Brief description of the drawings]
FIG. 1 is a plan view showing a disposable diaper according to the present invention from the liquid-permeable sheet side. FIG. 2 is a cross-sectional view taken along the line II-II of the diaper shown in FIG. Sectional view taken along line III [FIG. 4] Partial sectional view for explaining the state of the leakproof cuff at the end part [FIG. 5] Partially enlarged sectional view showing another embodiment of the leakproof cuff of the absorbent article of the present invention [ 6 is a partially enlarged cross-sectional view showing another embodiment of the leak-proof cuff of the absorbent article of the present invention. FIG. 7 is a partially enlarged cross-sectional view showing another embodiment of the leak-proof cuff of the absorbent article of the present invention. FIG. 8 is a partially enlarged cross-sectional view showing another embodiment of the leak-proof cuff of the absorbent article of the present invention. FIG. 9 is a partially enlarged cross-sectional view showing the joined state of the leak-proof cuff shown in FIG. 10] Partial cross-sectional view of a conventional disposable diaper leak-proof cuff [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2A Front part 2B Middle part 2C Rear part 3A Front waist part 3C Rear waist part 4 Side part 10 Top sheet 11 Back sheet 12 Absorbing core 14 Hydrophobic sheet 14A, 14C End part 17 of hydrophobic sheet Hanging sheet 20a Free end portion 20b Fixed end portion 21 Second flap 21a Free end portion 21b Fixed end portion 22 Third flap 22a Free end portion 22b Fixed end portion 25 Outward flap 25a Free end portion 25b Fixed end portions 30, 31, 32, 35, 39 Elastic member 45 Area 40A, 40B, 40C, 40D, 40E where free end side is joined Center line for leakage prevention cuff L1

Claims (11)

A main body having a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core sandwiched between the top sheet and the back sheet, and a liquid receiving side of the main body In an absorbent article having a pair of leak-proof cuffs extending in the longitudinal direction of the main body and disposed on both sides in the width direction perpendicular to the longitudinal direction,
The pair of leak-proof cuffs has one edge fixed to the main body as a fixed edge and the other edge is a free edge. The free edge generates a stretching force in the longitudinal direction to prevent the leakage. A first elastic member is provided for erecting the leakage cuff;
Between the fixed edge and the free edge of the leak-proof cuff, a flap is formed by folding a sheet constituting the leak-proof cuff and joining the folded inner surface thereof toward the center in the width direction of the main body. Absorbent article characterized by being formed to protrude. 2. The absorbent article according to claim 1, wherein the flap is formed so as to protrude from the leak-proof cuff to both the center side in the width direction of the main body and the outer side in the width direction. The said flap is provided in the center side of the width direction of the main body from the said leak-proof cuff, and forms the 2nd and 3rd flap, and both these 2 flaps extend in the longitudinal direction of a main body. Absorbent articles. The second and third flaps are joined to each other at an interval in the longitudinal direction of the main body, and a pocket is formed by the second and third flaps between the joint portions formed by the joining. Absorbent article. The absorbent article according to claim 3 or 4, wherein the flap protrudes outward in the width direction of the leak-proof cuff between the second and third flaps to form an outward flap. The absorbent article according to any one of claims 1 to 5, wherein a protrusion length of the flap from the leak-proof cuff is 5 mm or more and 10 mm or less. The said space | interval is 10 mm or more and 15 mm or less in the part in which the space | interval of the 2nd and 3rd flap is the most separated when multiple said flaps are provided in a leak-proof cuff. Absorbent article. The free end of each flap is provided with an elastic member that exerts an expansion / contraction force in the longitudinal direction of the main body, and the contraction tension of the first elastic member when the main body is expanded so that the longitudinal direction becomes a plane is provided. The absorbent article in any one of Claims 1-7 larger than the expansion-contraction tension | tensile_strength of the elastic member provided in each flap. A main body having a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core sandwiched between the top sheet and the back sheet, and a liquid receiving side of the main body In an absorbent article having a pair of leak-proof cuffs extending in the longitudinal direction of the main body and disposed on both sides in the width direction perpendicular to the longitudinal direction,
The pair of leak-proof cuffs has one edge fixed to the main body as a fixed edge and the other edge is a free edge. The free edge generates a stretching force in the longitudinal direction to prevent the leakage. A first elastic member is provided for erecting the leakage cuff;
The leak-proof cuff is corrugated between the fixed edge and the free edge, and the vertices of two waves directed toward the center in the width direction of the main body are joined at an interval in the longitudinal direction. And
An absorbent article characterized in that a pocket is formed between the two corrugations between the joints formed by the joining. An elastic member that exerts a stretching force in the longitudinal direction of the main body is provided at the apex of the corrugation, and the contraction tension of the first elastic member when the main body is expanded so that the longitudinal direction is a plane is the corrugation. The absorbent article of Claim 9 larger than the expansion-contraction tension | tensile_strength of the elastic member provided in the vertex. The absorbent article according to any one of claims 4, 9, and 10, wherein an opening length in a longitudinal direction of a pocket formed between the joint portions is 5 mm or more and 20 mm or less.

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