JP4275634B2 - Disposable diaper with leak-proof cuff - Google Patents

Description

  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.

  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.

  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.

  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.

  As an example of such a leak-proof cuff, the present applicant discloses a disposable wearing article provided with double leak-proof cuffs in Patent Document 1 below. Moreover, in patent document 2, the leak-proof cuff and a top sheet are indirectly joined, and the disposable diaper which the part which is not joined functions as a pocket is disclosed.

Further, the present applicant discloses in Patent Document 3 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.
JP-A-4-218159 Japanese Patent Publication No.7-24673 JP-A-8-215239

  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. .

  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.

  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.

  Such a problem similarly occurs in an open-type disposable diaper. In other words, if a leak-proof cuff with a large rising dimension is pointed over the entire length of the open diaper, the leak-proof cuff goes to the outside of the diaper at the crotch where the width of the diaper is small when worn on the body. It may protrude and not fully exhibit the leak-proof function.

  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.

  Another object of the present invention is a disposable diaper capable of reducing the frequency with which the leak-proof cuff is caught on the foot when the foot is inserted into the leg opening from the waist opening when the pants are molded. Is to provide.

The present invention provides a body comprising a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core interposed between the top sheet and the back sheet. In a disposable diaper having a front part applied to the ventral side, an intermediate part applied to the thigh on both sides, and a rear part applied to the back side,
The liquid-receiving side of the main body is provided with a leak-proof sheet that extends in the vertical direction and is spaced apart in the horizontal direction, and the leak-proof sheet is fixed to the main body along the vertical direction. When, and a free end remote from the fixed end, and an elastic member which exerts a contractive force in the longitudinal direction is attached to the free end or near the
Wherein the low upright portion is located in the front and rear ends and the middle portion of the barrier sheets, the joint formed by joining the inner surfaces and the barrier sheet folded in two is free the said fixed end portion A plurality of portions between the front end portion and the low standing portion and between the rear end portion and the low standing portion, the joint portion is not provided,
The front end portion and the rear end portion are fixed so that the plurality of joint portions and the free end portion are not separated from the surface of the main body, and the plurality of the joint portions and the free end portion are fixed at the low standing portion. The leak-proof cuff that is separated from the surface and is formed of the leak-proof sheet between the front end portion and the rear end portion has a height that can rise from the surface is low at the low standing portion , it is characterized in that the higher than said low standing part at both sides of the lower upright portion.

  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.

  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.

  According to the present invention, in the joint portion, the inner surfaces of the two folded sheets are joined in the entire width of the joint portion, or the joint portion is directed to the outside of the diaper and folded in two. The inner surfaces of the joints are joined at the folding point, the joints are formed at intervals in the vertical direction, and pockets are formed inside the folds of the joints.

  Further, in the present invention, the lateral side portions of the front portion and the lateral side portions of the rear portion are joined to each other, and a waist opening is formed at each edge of the front portion and the rear portion, This is particularly effective when leg openings are formed on both sides of the intermediate portion, and the main body has a pant shape.

  In this case, when the diaper is worn, the leak-proof cuff located at the lower end of the leg opening is less likely to hit the foot, and the wearing is easy.

  Further, when the waist opening side of the pant-type 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 is the height direction of the pant-type body. It is preferable to form in the area | region containing the lowest end of.

  When wearing a pants-type diaper, the frequency of the feet 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.

For example, as shown in FIG. 1, the overall length in the height direction of the pant-type body is H0, the dimension in the height direction of the portion where the leg opening is formed is H _L , and the lowest end is the starting point. It is preferable that Hc is less than H _L when the dimension in the height direction of the region where the joint is formed is Hc.

  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.

Moreover, in order to exhibit the function of preventing lateral leakage around the leg opening, the Hc is preferably less than half of _HL .

  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.

  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.

  In the disposable diaper of the present invention, the leak-proof cuff is easily raised at the middle part and before and after the middle part and is easily maintained in 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, so that excrement such as soft stool or water-soluble stool that cannot be absorbed by the absorption core flows in the lateral direction. It is possible to effectively prevent leaking over the leak-proof cuff.

  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.

  Furthermore, when the disposable diaper of the present invention is preliminarily formed into a pants shape, the length of the leakage-proof cuff that can be raised at the intermediate portion can be substantially the same as or less than that of the conventional one, so The leak-proof cuff is not caught on the wearer's leg when worn through the leg, and can be worn smoothly.

  Further, in both the pants type and the open type, the leak-proof cuff is difficult to protrude from both sides of the diaper at the crotch.

  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.

  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.

  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.

  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.

  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.

  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.

In liquid receiving side of the diaper 1 in the top of the top sheet 10, for example, both side portions 4B, in 4B, as the leak-proof sheet for forming a leak-barrier cuffs, the hydrophobic sheet 14 a rectangular (band-like) is partially folded It is provided in the state. 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).

  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.

  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.

  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.

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 to form a low standing part. 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.

  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), 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.

  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.

  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. .

  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.

  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.

  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.

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 _HL 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 less than half of _HL . The dimension of Hc is more preferably 30 mm or less.

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 the leak-proof cuff 40B having a long standing height is present above the leg opening 9 ( _HL- Hc region), a side leakage such as soft stool is sufficiently caused in the upper part of the leg opening 9. Can be suppressed.

  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.

  The hydrophobic sheet 14 forming the leak-proof cuff 40 is preferably breathable. For example, spunbond nonwoven fabrics made of polypropylene fibers, sheets of spunbond nonwoven fabrics, meltblown nonwoven fabrics and spunbond nonwoven fabrics, 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.

  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.

  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.

  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.

In the leak-proof cuff 40A3 shown in FIG. 8, joint portions (bi-fold joint portions) 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. Yes.

  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.

  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.

  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.

  In addition, the leak-proof cuff of this invention can also be provided in what is called an open type diaper. In an open diaper, if a leak-proof cuff 40A having a low stand-up height as shown in FIG. 3 is provided in the middle part, the leak-proof cuff hardly protrudes from the side of the diaper at the crotch part.

  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.

  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.

The perspective view which shows the underpants type diaper as one embodiment of this invention The perspective view shown from a liquid receiving side in the state which unfolded the underpants type diaper shown in FIG. Sectional view taken along line III-III in FIG. Sectional view taken along line IV-IV in FIG. Sectional view of the VV line of FIG. Partial expanded sectional view which shows other embodiment of the leak-proof cuff of the disposable diaper of this invention Partial expanded sectional view which shows other embodiment of the leak-proof cuff of the disposable diaper of this invention Partial expanded sectional view which shows other embodiment of the leak-proof cuff of the disposable diaper of this invention Partial expanded sectional view which shows other embodiment of the leak-proof cuff of the disposable diaper of this invention Perspective view showing a conventional disposable diaper Sectional drawing of the leak-proof cuff provided in the disposable diaper of FIG.

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 The edge part 21 of the vertical 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 Leakproof cuff 40B at intermediate portion Leakproof near front and rear surface portions 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 (10)

A body comprising a liquid-permeable top sheet directed toward the liquid receiving side, a back sheet directed outward, and an absorbent core interposed between the top sheet and the back sheet is disposed on the abdomen side of the wearer. In a disposable diaper having a front part to be applied, an intermediate part in which both sides are applied to the thigh, and a rear part to be applied to the back side,
The liquid-receiving side of the main body is provided with a leak-proof sheet that extends in the vertical direction and is spaced apart in the horizontal direction, and the leak-proof sheet is fixed to the main body along the vertical direction. When, and a free end remote from the fixed end, and an elastic member which exerts a contractive force in the longitudinal direction is attached to the free end or near the
Wherein the low upright portion is located in the front and rear ends and the middle portion of the barrier sheets, the joint formed by joining the inner surfaces and the barrier sheet folded in two is free the said fixed end portion A plurality of portions between the front end portion and the low standing portion and between the rear end portion and the low standing portion, the joint portion is not provided,
The front end portion and the rear end portion are fixed so that the plurality of joint portions and the free end portion are not separated from the surface of the main body, and the plurality of the joint portions and the free end portion are fixed at the low standing portion. The leak-proof cuff that is separated from the surface and is formed of the leak-proof sheet between the front end portion and the rear end portion has a height that can rise from the surface is low at the low standing portion , The disposable diaper which has a leak-proof cuff characterized by being higher than the said low standing part on both sides which pinch | interpose a low standing part .   The disposable diaper having a leak-proof cuff according to claim 1, wherein the inner surfaces of the folded sheets are joined at the joint portion over the entire width of the joint portion.   The joint is directed to the outer side of the diaper, the inner surfaces of the folded sheets are joined at the folding point, and the joint is formed at intervals in the vertical direction to form a pocket inside the fold of the joint. A disposable diaper having a leak-proof cuff according to claim 1.   Both sides of the front part and both sides of the rear part are joined together to form a waist opening and a pair of leg openings, and both sides of the intermediate part are located in the leg openings, A disposable diaper having a leak-proof cuff according to any one of claims 1 to 3, wherein the main body has a pants shape. The pants-type waist opening side upper portion of the main body, the leg lower opening side, when from the lower height direction and a direction toward the top, the joint is of pants-type body in the height direction The disposable diaper which has the leak-proof cuff of Claim 4 currently formed in the area | region containing a lowest end. When the dimension in the height direction of the portion 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 lowest end is Hc, Hc The disposable diaper having a leak-proof cuff according to claim 5, wherein is less than H _L. The disposable diaper having a leak-proof cuff according to claim 6, wherein the Hc is not more than half of _HL . The leak-proof according to any one of claims 1 to 7, wherein a length of the leak-proof cuff that can be raised from the main body is 50 mm or more at a portion where the joint portions on both sides of the low standing portion are not formed. A disposable diaper with a cuff. The disposable body having a leak-proof cuff according to any one of claims 1 to 8, wherein a length of the leak-proof cuff from the main body that can stand up is 10 mm or more in the low standing part in which the joint is formed. Diapers. The disposable diaper having a leak-proof cuff according to any one of claims 1 to 9, wherein a width dimension of the leak-proof sheet constituting the leak-proof cuff is the same in the entire length in the vertical direction.