JP3667152B2 - Disposable diaper with leak-proof cuff - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable diaper having a leak-proof cuff, and in particular, increases the leak-proof capability of the leak-proof cuff so that the leak-proof cuff hits the thigh with an appropriate length when worn on the body. Related to disposable diapers.
[0002]
[Prior art]
In recent years, open-type disposable diapers and disposable diapers previously molded into a pants shape have been widely used. FIG. 10 is a perspective view showing a conventional disposable diaper formed into a pants shape, and FIG. 11 is a sectional view of a leak-proof cuff provided in the disposable diaper of FIG.
[0003]
A pants-type disposable diaper 101 shown in FIG. 10 includes a liquid-permeable top sheet 110 directed toward the wearer as shown in the cross-sectional view of FIG. 11, and a liquid-impermeable back sheet 111 directed outward. The laminate is composed of an absorbent core 112 sandwiched between the top sheet 110 and the back sheet 111. This disposable diaper comprises a front surface portion that is applied to the wearer's abdomen during use, a rear surface portion that is applied to the back side, and an hourglass-shaped laminate having an intermediate portion that is applied to the thigh on both sides. The side portions in the horizontal direction of the portion and the both side portions in the horizontal direction of the rear surface portion are joined to each other. And in the disposable diaper 101, the waist opening part 108 is formed in each edge part of the said front part and a rear surface part, and the leg opening part 109 is formed in the both sides of the said intermediate part.
[0004]
When the wearer of the diaper 101 excretes, the excrement is absorbed by the absorption core 112. However, if a large amount of excretion is performed at one time, excretion that cannot be absorbed by the absorption core 112 is lateral (the leg opening 109). Direction). In order to prevent this excrement from leaking out of the diaper 101 from the leg opening 109, a leak-proof cuff 140 that rises toward the wearer is provided. 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 end portion. 140b.
[0005]
As an example of such a leak-proof cuff, the present applicant discloses a disposable wearing article provided with a double leak-proof cuff in Japanese Patent Laid-Open No. 4-218159. Japanese Patent Publication No. 7-24673 discloses a disposable diaper in which a leak-proof cuff and a top sheet are indirectly joined, and the unjoined portion functions as a pocket.
[0006]
In addition, the present applicant discloses in JP-A-8-215239 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.
[0007]
[Problems to be solved by the invention]
In any case, in order to improve leakage prevention of soft stool to the leg opening 109 side, it is necessary for this type of leak-proof cuff 140 that the rising dimension from the liquid receiving side of the diaper main body is increased to some extent. .
[0008]
However, if the rising dimension of the leak-proof cuff is increased over its entire length, the leak-proof cuff 140 located inside the lower end 109a of the leg opening 109 becomes an obstacle when inserting the leg. That is, when wearing this type of pants-type disposable diaper, the toes are inserted into the leg opening 109 from the waist opening 108, and at this time, the fingertip protrudes inside the lower end 109a. It hits the cuff 140 and hinders wearing.
[0009]
In addition, when the disposable diaper is attached, the leak-proof cuff 140 may be sandwiched between the lower end 109a of the leg opening 109 and the thigh and protrude outward. If the leak-proof cuff protrudes outside the diaper in this way, the leak-proof function for preventing side leakage in the diaper cannot be exhibited.
[0011]
The object of the present invention is to solve the above-mentioned problems, and when a leak-proof cuff having a relatively large rising dimension is provided, the leak-proof cuff protrudes to the side of the diaper at the mounting portion on the thigh. The object is to provide a disposable diaper having a leak-proof cuff.
[0012]
Another object of the present invention is to provide a disposable diaper capable of reducing the frequency with which the leak-proof cuff is caught on the foot when the foot is inserted from the waist opening into the leg opening.
[0013]
[Means for Solving the Problems]
The object of the present invention comprises a liquid-pervious top sheet to be directed to the liquid-receiving side, a back sheet directed outwardly, the body having an absorbent core disposed between said topsheet and said backsheet A front portion applied to the abdomen side of the wearer, an intermediate portion applied to the thigh on both sides, and a rear surface portion applied to the dorsal side, both sides of the front portion, In the pants-type disposable diaper in which both sides are joined together, a waist opening and a pair of leg openings are formed, and both sides of the intermediate part are located in the leg openings,
The liquid receiving side of the main body, longitudinally extending and laterally spaced a leak-barrier cuffs are provided, the leak-barrier cuffs, the fixed end along the longitudinal direction is fixed to the body And a sheet having a free end, and an elastic member that is attached to the sheet at or near the free end and exerts a contraction force in the vertical direction,
Wherein the leak-barrier cuffs, the joint Ru narrowing the width is formed between the fixed end portion by joining sheets to each other and a free end portion, the joint portion is provided in said intermediate portion, said body The disposable diaper having a leak-proof cuff is characterized in that an upright length of the leak-proof cuff from is low at a portion having the joint and high at both longitudinal sides sandwiching the joint.
[0014]
In the disposable diaper according to the present invention, the length of the leakage-proof cuff that can stand up is long at a place other than the middle portion, while the length of the leak-proof cuff that stands up at the middle portion, that is, the portion that hits the thigh of the wearer. It is getting shorter. Therefore, at the time of mounting, the leak-proof cuff stands up at the intermediate portion and at the front and rear thereof, and the shape is easily maintained. In addition, the leak-proof cuff is not sandwiched between the diaper and the thigh at the intermediate portion and does not protrude laterally.
[0015]
In addition, at least at the excretion position, that is, the position corresponding to the vicinity of the anus, the length of the leak-proof cuff that can be raised can be lengthened, so that excrement such as soft stool or water-soluble stool that cannot be absorbed by the absorption core has a lateral direction. When they flow, they can effectively prevent them from leaking over the leak-proof cuff.
[0016]
Moreover, in the said junction part, the sheet | seat which comprises the said leak-proof cuff can be comprised as a fold joint part by which the sheet | seat which comprises the said leak-proof cuff was folded in two, and the folding inner surfaces were joined.
[0019]
When wearing a diaper , the leak-proof cuff located at the lower end of the leg opening is less likely to hit the foot and is easy to wear.
[0020]
Further, when the waist opening side of the main body is the upper part, the leg opening part side is the lower part, and the direction from the lower part to the upper part is the height direction, the joint part has the lowest end in the height direction of the main body. It is preferable that it is formed in the region to be included.
[0021]
When wearing a diaper, the frequency of the foot tip passing through the lower end of the leg opening is high. Therefore, if the said junction part is provided in the lower end part of a leg opening part, it will become difficult to catch a leg tip on a leak-proof cuff.
[0022]
For example, as shown in FIG. 1, the total length in the height direction of the main body is H0, the dimension in the height direction of the portion where the leg opening is formed is H _L , and the joint is started from the lowest end. It is preferable that Hc is less than _HL , where Hc is the dimension in the height direction of the region where is formed.
[0023]
By making the region where the joint portion is formed a region including the lower end of the leg opening, the foot is less likely to hit the leak-proof cuff when worn as described above, and in the region other than the lower end, It is possible to increase the rising dimension of the leakage prevention cuff on the inner side, and to exhibit a side leakage prevention function in the region above the leg opening.
[0024]
Moreover, in order to exhibit the function of preventing side leakage around the leg opening, the Hc is preferably less than half of H _L.
[0025]
In order to effectively prevent side leakage such as loose stool, it is preferable that the length at which the leakage-proof cuff can stand from the main body is 50 mm or more at a portion where the joint portion is not formed.
[0026]
In addition, it is preferable that the length at which the leak-proof cuff can stand from the main body is 10 mm or more in the portion where the joint portion is formed from the viewpoint that the leak-proof function is not impaired in the joint portion.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing a pants-type disposable diaper as one embodiment of the present invention, FIG. 2 is a perspective view showing the pants-type disposable diaper shown in FIG. 3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line V-V in FIG.
[0028]
The disposable diaper 1 of the present invention shown in FIG. 1 is formed in a pants shape in advance, and has a so-called hourglass shape as shown in FIG. In the unfolded state shown in FIG. 2, the diaper 1 includes a front surface portion 2A applied to the wearer's abdomen during use, a rear surface portion 2C applied to the buttocks and / or back during use, and both side portions 4B of the diaper 1 during use. 4B has an intermediate part 2B applied to the thigh. A direction from the front surface portion 2A through the intermediate portion 2B to the rear surface portion 2C is defined as a Y direction (vertical direction), and a direction orthogonal thereto is defined as an X direction (lateral direction). Moreover, let the direction which goes to a wearer side be a Z direction.
[0029]
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 by the laminated body (main body) with the absorption core 12 slightly smaller than those sheets pinched | interposed. The top sheet 10 and the back sheet 11 have an hourglass shape, and the absorbent core 12 has a rectangular shape or 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.
[0030]
The lateral side portion 4A of the front surface portion 2A and the lateral side portion 4C of the rear surface portion 2C are joined to each other, and the edges of the front surface portion 2A and the rear surface portion 2C, that is, waist ends 3A and 3C are waisted. An opening 8 is formed. Further, leg openings 9 are formed on both side portions 4B of the intermediate portion 2B, and the laminate (main body) forms a pants shape as shown in FIG.
[0031]
An elastic member (elastic band) 15 is attached to the waist ends 3A and 3C in the lateral direction, and a waist gather is formed in the waist opening 8 by the elastic contraction force of the elastic member 15 as shown in FIG. . Leg-side elastic members (elastic bands) 16 are attached to the both side portions 4B. As shown in FIG. 1, leg gathers (leg-side) are formed around the leg openings 9 by the elastic contraction force of the elastic members 16. Cuff) is formed.
[0032]
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. 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 such as tissue. It is a thing.
[0033]
On the liquid receiving side of the diaper 1, for example, on the top sheet 10, a rectangular (band-like) hydrophobic sheet 14 is provided in a partially folded state in order to form a leak-proof cuff on both side portions 4B and 4B. Yes. The hydrophobic sheet 14 is symmetrically spaced in the lateral direction (X direction) with respect to the center line L1, and is provided along the Y direction (vertical direction).
[0034]
As shown in FIGS. 3, 4, and 5, the rectangular hydrophobic sheet 14 has an adhesive portion 14 </ b> D having a predetermined width W bonded and fixed from the top sheet 10 to the back sheet 11. An inner end portion of the portion 14 </ b> D serves as a fixed end portion 40 b that serves as a standing fulcrum of the leak-proof cuff 40. On the other hand, the elastic member 30 is attached to the free end 40a on the opposite side (center line L1 side) of the hydrophobic sheet 14 in an extended state over almost the entire length in the Y direction.
[0035]
At both end portions 14A and 14C in the longitudinal direction of the hydrophobic sheet 14, the free end portion 40a is tilted to the center line L1 side (or the outside opposite to this) and joined to the top sheet 10. As a result, in the three-dimensional pants-type diaper shown in FIG. 1, as shown in FIGS. 3 and 4, the free end 40a of the leak-proof cuff 40 rises in the wearer direction (Z direction) and prevents side leakage. A leak-proof cuff 40 is formed.
[0036]
The leak-proof cuff 40 has an upright length (from the free end portion 40a to the fixed end portion 40b) in the middle portion 2B of the diaper 1, its front and rear (front surface portion 2A, rear surface portion 2C), and the front and rear end portions 3A and 3C. The length that can rise up to) is different.
[0037]
In the intermediate portion 2B, as shown in FIG. 3, the hydrophobic sheet 14 protrudes laterally outward of the diaper at the folding lines 21a and 22a between the fixed end portion 40b and the free end portion 40a. It is folded in half into a mountain fold. Then, the inner surfaces of the hydrophobic sheet 14 are bonded and bonded to each other across the entire width from the fold line 21a to the fold point 21b and from the fold line 22a to the fold point 22b, and two joints projecting outward in the X direction of the diaper. Portions (two-fold joint portions) 21 and 22 are formed. As a result, as shown in FIG. 3, a leak-proof cuff 40A having a short standing length is formed.
[0038]
The leak-proof cuff 40A is an area including at least the center line L2 in the Y direction (vertical direction) in the intermediate portion 2B, and has a length of 20 mm or more before and after the center line L2 (the entire length of the leak-proof cuff 40A). 40 mm or more), and more preferably 40 mm or more before and after the center line L2 (80 mm or more in total length of the leak-proof cuff 40A). In FIG. 2, the region where the leak-proof cuff 40A is formed is indicated by hatching.
[0039]
As shown in FIG. 5, in the vicinity of both ends 14 </ b> A and 14 </ b> C in the vertical direction of the hydrophobic sheet 14, the free end 40 a is bonded to the top sheet 10 in a state where it falls to the center line L <b> 1 side. In FIG. 2, this adhesion region is shown with hatching.
[0040]
At both ends 14A and 14C, the same fold lines 21a and 22a as in FIG. 3 are formed, and the inner surfaces of the hydrophobic sheet 14 are joined in the range from the fold lines 21a and 22a to the fold points 21b and 22b. (Folded joint portions) 21 and 22 are formed. If the folding width dimension of the joining parts 21 and 22 is the same as the folding width dimension of the joining parts 21 and 22 in the leak-proof cuff 40A shown in FIG. 3, the attachment work of the hydrophobic sheet 14 is easy. .
[0041]
Note that, at the both end portions 14A and 14C, the joint portions 21 and 22 may be adhered to each other and further adhered and fixed to the adhesion portion 14D, or the joint portions 21 and 22 may not be adhered to each other. Further, it may be in a free state where it is not bonded to the bonding portion 14D.
[0042]
And in the area | regions other than the said both ends 14A and 14C and the said leak-proof cuff 40A, as shown in FIG. 4, it is the leak-proof cuff 40B with the long standable height from the liquid receiving side of the diaper main body. In addition, the lower end part of the hydrophobic sheet | seat 14 which forms the leak-proof cuff 40B shown in FIG. 4 is joined to a top sheet in the center side of the horizontal direction of a diaper, and the standable height of the leak-proof cuff 40B is shown in FIG. It may be slightly lower than shown.
[0043]
In addition, it is preferable that the standable length of the leak-proof cuff 40A shown in FIG. 3 is 10 mm or more. If this leak-proof cuff 40A is shorter than 10 mm, the leak prevention effect by leak-proof cuff 40A will fall. In addition, it is preferable that the standable height of the leak-proof cuff 40A is not more than the length from the fixed end portion 40b to the side portion 4B of the diaper in FIG. If comprised in this way, when the leak-proof cuff 40A falls to the outer side of a diaper, the free end part 40a will not protrude outside from the side part 4B in the intermediate part 2B of a diaper. Moreover, it is preferable that the standable length of the leak-proof cuff 40B in FIG. 4 is at least 50 mm or more. More preferably, it is 70 mm or more.
[0044]
When formed into a three-dimensional pant shape as shown in FIG. 1 or when the whole is crushed in the F direction and flattened in the state shown in FIG. 1, the vertical direction of FIG. The length of the pants-type diaper 1 in the height direction is H0, the dimension in the height direction of the portion where the leg opening 9 is formed is H _L , and the leakproof cuff starts from the lowest end of the diaper. It is preferable that Hc is less than H _L when the dimension in the height direction of the portion where the higher one of the boundary points between 40A and leak-proof cuff 40B exists is Hc. More preferably, Hc is not more than half of H _L. The dimension of Hc is more preferably 30 mm or less.
[0045]
If comprised as mentioned above, since the said leak-proof cuff 40A exists in the area | region including the lowest end with which a leg part is mounted | worn in the leg opening part 9, a leg | foot is changed from the waist opening part 8 to the leg opening part 9 at the time of mounting | wearing. When passing, the toes of the foot are less likely to be caught by the leak-proof cuff 40A. In addition, since there is a leak-proof cuff 40B having a long standing height above the leg opening 9 (H _L -Hc region), the upper side of the leg opening 9 is sufficient to prevent side leakage such as soft stool. Can be suppressed.
[0046]
Further, when the elastic member 16 provided around the leg opening 9 comes into close contact with the thigh when worn on the body, the leak-proof cuff is formed between the thigh and the lower part in the lower part of the leg opening 9. The phenomenon of being sandwiched between the elastic members 16 and protruding outward from the diaper is less likely to occur.
[0047]
The hydrophobic sheet 14 forming the leak-proof cuff 40 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, since the hydrophobic sheets 14 or the hydrophobic sheet 14 and the top sheet 10 can be joined together by heat treatment or ultrasonic treatment, it is easy to form a leak-proof cuff. A hot melt adhesive may be used for bonding the hydrophobic sheet 14.
[0048]
There are various means for shortening the standable length of the leak-proof cuff in the middle part of the disposable diaper of the present invention. FIGS. 6, 7, 8, and 9 are cross-sectional views showing modifications 40A1, 40A2, 40A3, and 40A4 of the leak-proof cuff 40A having a short standing height.
[0049]
In the leak-proof cuff 40A1 shown in FIG. 6, the hydrophobic sheet 14 is folded in two at two locations, but the hydrophobic sheets 14 are joined to each other only at the folding points 21b and 22b in the respective folded portions. . Here, if the bonding points between the hydrophobic sheets at the folding points 21b and 22b are formed at intervals in the vertical direction (Y direction), pockets 21c and 22c are formed inside the folded portion of the hydrophobic sheet 14. The pockets 21c and 22c can catch urine and the like, and the leakage prevention effect of the leakage prevention cuff 40A1 can be further enhanced. Further, by forming the pockets 21c and 22c, air circulation can be improved and stuffiness can be prevented.
[0050]
In the leak-proof cuff 40A2 in FIG. 7, joint portions (two-fold joint portions) 21 and 22 that join the entire inner surface of the hydrophobic sheet 14 are joined to each other in the same manner as shown in FIG. The sheet 14 is tilted and bonded to the bonding portion 14D. Thereby, the standable length of the leak-proof cuff is shortened.
[0051]
In the leak-proof cuff 40A3 shown in FIG. 8, joints (bi-fold joints) 22 and 23 formed by joining the hydrophobic sheets 14 project toward both the outer side of the diaper and the inner side of the diaper. ing.
[0052]
In the leak-proof cuff 40A4 shown in FIG. 9, the joint portions 23 and 24 formed by joining the hydrophobic sheets to each other protrude toward the center line L1.
[0053]
As shown in FIGS. 8 and 9, if joints 23 and 24 extending inward from each of leak-proof cuffs 40 </ b> A <b> 3 and 40 </ b> A <b> 4 are formed, a pocket is formed between joint 23 or 24 and top sheet 10. Further, in FIG. 9, a pocket is formed between the joint portion 23 and the joint portion 24, so that urine and soft stool leaked sideways can be received by the pocket.
[0054]
In addition, when the junction part which joined the hydrophobic sheet | seats in the intermediate part of a leak-proof cuff is formed, an elastic member is provided in the folding line (for example, the part shown by the code | symbol 21a, 21b in FIG. 3) of each junction part. You can also. Moreover, the said junction part may be formed only in one place between the fixed end part 40b and the free end part 40a.
[0056]
In addition, the leak-proof cuff in the middle part of the disposable diaper of the present invention can be formed by further folding and joining the hydrophobic sheet, for example, by folding it in three or four. In addition, by changing the width dimension in the X direction of the hydrophobic sheet at each of the intermediate portion and other locations, it is possible to change the standable length of the leakage-proof cuff at the intermediate portion.
[0057]
Moreover, if the leak-proof cuff in the disposable diaper of this invention has the length which can be stood up at least in the rear surface part, it can prevent the leakage of a soft stool or a water-soluble stool. Therefore, for example, the height at which the leakage-proof cuff can stand up may be shortened in the same manner as the leakage-proof cuff in the intermediate portion at the front surface portion.
[0058]
【The invention's effect】
As described above in detail, in the disposable diaper of the present invention, the leak-proof cuff easily stands up at the middle part and before and after the middle part and is easy to maintain the shape. And at least at the excretion position, that is, the position corresponding to the vicinity of the anus, the length of the leak-proof cuff that can stand up is long. It is possible to effectively prevent leaking over the leak-proof cuff.
[0059]
In addition, since the leak-proof cuff can be formed by simply joining the inner surfaces of the sheets in the middle of the leak-proof cuff having a normal shape (for example, a simple leak-proof cuff as shown in FIG. 11), the manufacturing process is very complicated. In addition, since many elastic members are not provided, the cost is low.
[0060]
Furthermore, in the disposable diaper of the present invention, the length of the leakage-proof cuff that can be raised at the intermediate portion can be substantially the same as or shorter than that of the conventional one. It can be worn smoothly without being caught on the wearer's leg.
[0061]
In addition, the leak-proof cuff is difficult to protrude from both sides of the diaper at the crotch.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a pants-type diaper as an embodiment of the present invention. FIG. 2 is a perspective view showing the pants-type diaper shown in FIG. Fig. 4 is a sectional view taken along line IV-IV in Fig. 2. Fig. 5 is a sectional view taken along line V-V in Fig. 2. Fig. 6 is a leak-proof cuff of the disposable diaper of the present invention. FIG. 7 is a partially enlarged cross-sectional view showing another embodiment of the leak-proof cuff of the disposable diaper of the present invention. FIG. 8 is another leak-proof cuff of the disposable diaper of the present invention. FIG. 9 is a partially enlarged sectional view showing another embodiment of the leak-proof cuff of the disposable diaper of the present invention. FIG. 10 is a perspective view showing a conventional disposable diaper. ] Cross-sectional view of a leak-proof cuff provided in the disposable diaper of FIG. 10 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2A Front surface part 2B Middle part 2C Rear surface part 3A Front waist part 3C Rear waist part 4B Side part 10 Top sheet 11 Back sheet 12 Absorption core 14 Hydrophobic sheet 14A, 14C End part 21 of the longitudinal direction of a hydrophobic sheet, 22, 23, 24 Junction 21a, 22a Folding line 21b, 22b Folding point 40a Free end 40b Fixed end 40A, 40A1, 40A2, 40A3, 40A4 Leak-proof cuff 40B at intermediate part Leak-proofing near front and rear parts Cuff 40C Leak-proof cuff L1 in the vicinity of the front and rear waist L1 Center line in the X direction L2 Center line in the Y direction

Claims (8)

A liquid permeable topsheet which is directed to the liquid-receiving side, a back sheet directed outwardly, the body having an absorbent core disposed between said topsheet and said backsheet, on the ventral side of the wearer A front portion to be applied, an intermediate portion to which both sides are applied to the thigh, and a rear surface portion to be applied to the back side, and both sides of the front portion and both sides of the rear surface are joined to each other. In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed, and both sides of the intermediate part are located in the leg openings,
On the liquid receiving side of the main body, there is provided a leak-proof cuff that extends in the vertical direction and is spaced apart in the horizontal direction,
The leak-proof cuff is attached to the sheet at or near the free end, and a sheet having a fixed end fixed to the main body along the vertical direction and a free end, and contracts in the vertical direction. An elastic member that exerts force,
Wherein the leak-barrier cuffs, the joint Ru narrowing the width is formed between the fixed end portion by joining sheets to each other and a free end portion, the joint portion is provided in said intermediate portion, said body The disposable diaper having a leak-proof cuff is characterized in that the length of the leak-proof cuff from which the leak-proof cuff can stand is low at the portion having the joint and high at both sides in the longitudinal direction across the joint. Wherein in the joint portion, a disposable diaper having a leak-barrier cuffs according to claim 1, wherein the folded inner surfaces are sheets constituting the leakage preventing cuffs are folio is joined. When the waist opening side of the main body is the upper part, the leg opening part side is the lower part, and the direction from the lower part to the upper part is the height direction , the joint part includes the lowest end in the height direction of the main body. A disposable diaper having a leak-proof cuff according to claim 1 or 2 . When the dimension in the height direction of the part where the leg opening is formed is H _L , and the dimension in the height direction of the region where the joint is formed starting from the lowermost end is Hc. The disposable diaper having a leak-proof cuff according to claim 3 , wherein is less than _HL . The disposable diaper having a leak-proof cuff according to claim 4 , wherein the Hc is not more than half of _HL . The disposable diaper having a leak-proof cuff according to any one of claims 1 to 5 , wherein a length at which the leak-proof cuff can stand from the main body is 50 mm or more at a portion where the joint portion is not formed. The disposable diaper having a leak-proof cuff according to any one of claims 1 to 6 , wherein a length at which the leak-proof cuff can stand from the main body is 10 mm or more at a portion where the joint portion is formed. The disposable diaper having a leak-proof cuff according to any one of claims 1 to 7 , wherein a width dimension of a sheet constituting the leak-proof cuff is the same in the entire length in the longitudinal direction.

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