JP6863254B2 - Pants type diaper - Google Patents

Description

The present invention relates to disposable pants-type diapers.

Disposable pants-type diapers generally include a front body that covers the wearer's abdomen, a back body that covers the wearer's back, and an inseam that straddles the front and back bodies and covers the wearer's inseam. .. When both ends of the front and back bodies in the waist direction are joined, the upper ends of the front and back bodies form a waist opening, and the lower ends of the front and back bodies and the side edges of the inseam. Consists of an opening around the leg (see Patent Document 1).

Japanese Patent No. 6124613

By the way, young children such as newborns and infants use tape-type diapers, but it is difficult to put on tape-type diapers even for young children at the developmental stage where their legs can be fluttered. Become. For this reason, at such a developmental stage, the tape-type diaper is gradually switched to the pants-type diaper.

Younger children are still bedridden and have knee-bent postures like frog legs. It is more difficult to put on a pants-type diaper for such a young child than to put on a pants-type diaper for a standing infant.

To solve such a problem, by enlarging the leg circumference opening, it is possible to facilitate insertion into the leg circumference opening even if the leg is in a state where the knee is bent like a frog leg. .. On the other hand, if the leg circumference opening is made too large, the fit to the leg circumference deteriorates and the possibility of lateral leakage increases.

An object of the present invention is to provide a pants-type diaper that can be easily put on by a young child and suppresses lateral leakage when worn by a young child.

The pants-type diaper for solving the above problems covers the inseam of the wearer, straddling the front body covering the abdomen of the wearer, the back body covering the back of the wearer, and the front body and the back body. The front body and the rear body are provided with a plurality of elastic members parallel to each other in the waist direction, and the front body and the rear body are joined in a state where both ends in the waist direction are joined. The upper ends of the front body and the back body form an opening around the waist, and the lower ends of the front body and the back body and the side edges of the inseam form an opening around the legs. The distance L1 between the upper end of the front body and the upper end of the back body is 400 mm or less in a state where the joint with the back body is released and unfolded, and the elastic member on the most inseam side of the front body The distance L2 from the elastic member on the most inseam side of the back body is 34% or more and 64% or less of the distance L1. The distance L3 between the front body and both ends of the back body in the waist direction is 26% or more and 56% or less of the distance L2.

According to the above configuration, the shape and size of the leg opening can be smoothly inserted into the leg opening of the frog leg of a young child in the developmental stage so that the leg can be fluttered. Can be made into the optimum size and shape. Therefore, when the diaper is put on by a young child, the leg of the young child can be smoothly inserted into the leg opening, and the shape and size of the leg opening can be changed to the young child. It is possible to obtain an optimum size and shape that does not impair the fit to the diaper neck of a young child in the state of being worn, and it is possible to suppress lateral leakage in the state of being worn by a young child.

In the pants-type diaper, the distance L1 may be 300 mm or more.
According to the above configuration, it is possible to provide a pants-type diaper in which the shape and size of the leg circumference opening are optimized even for a wearer of a young child such as an infant.

In the pants-type diaper, the distance L2 may be 49% or less of the distance L1.
According to the above configuration, the fit to the rat neck of a young child can be further improved when worn by a young child, and lateral leakage can be further suppressed when worn by a young child. ..

In the pants-type diaper, the distance L3 may be 41% or more of the distance L2.
According to the above configuration, when the diaper is put on by a young child, the leg of the young child can be inserted more smoothly into the leg opening, which further makes it easier for the young child to put on the diaper. Can be improved.

In the pants-type diaper, the front body is composed of a first exterior body, the rear body is composed of a second exterior body, the inseam is composed of an absorbent body, and the front and rear of the absorbent body. The front end portion in the direction may be joined to the first exterior body, and the rear end portion may be joined to the second exterior body.
According to the above configuration, in a diaper composed of a first exterior body, a second exterior body, and an absorbent main body, the size and shape of the leg circumference opening can be optimized.

According to the present invention, it is possible to provide a disposable diaper that can be easily put on by a young child and suppresses lateral leakage in a state of being put on by a young child.

The perspective view which shows the state which the wearer wears the pants type diaper to which this invention is applied. The plan view which shows the unfolded state of the pants-type diaper to which this invention is applied. FIG. 2A is a cross-sectional view taken along the line 2A showing a developed state of a pants-type diaper to which the present invention is applied. (A) is a plan view showing the adhesive region of the upper region corresponding to FIG. 2, and (b) is a plan view showing the adhesive region of the lower region corresponding to FIG.

A pants-type disposable diaper according to an embodiment embodying the pants-type diaper according to the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the pants-type disposable diaper 10 (hereinafter, simply referred to as “diaper 10”) is suitable for a newborn baby or a young wearer 100 whose legs are bent at the knee like a frog leg. Pants-type disposable diapers. The diaper 10 includes a front body 10F having a shape following the abdominal shape of the human body, a back body 10R having a shape following the shape of the back of the human body, and an inseam 10C connecting the front body 10F and the back body 10R.

On the front body 10F, the side opposite to the inseam 10C constitutes a waist circumference portion 10W that surrounds the waist circumference portion of the wearer 100 in the waist circumference direction, and a waist circumference opening 10A is provided at the upper end portion. Further, the left and right lower ends on the front body 10F, the left and right lower ends on the back body 10R in the waist direction, and the left and right left and right edges on the crotch 10C in the waist direction surround the thighs of the human body. It constitutes a pair of left and right leg circumference openings 10L having the above. Further, the left and right ends of the front body 10F and the rear body 10R in the waist direction are joints 11.

FIG. 2 is a plan view showing an unfolded state of a pants-type disposable diaper, and FIG. 3 is a cross-sectional view taken along the line aa of FIG. In FIG. 3, the right side is the skin side of the diaper wearer. The waistline portion 10W in the front body 10F is composed of the ventral exterior body 12F as the first exterior body, and the waist circumference portion 10W in the rear body 10R is composed of the dorsal exterior body 12R as the second exterior body.

The ventral exterior body 12F and the dorsal exterior body 12R have a rectangular shape with the waist circumference direction as the longitudinal direction. The sheet constituting the exterior body is, for example, a non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, or other thermoplastic resin, and may be a liquid-permeable sheet or a liquid-impermeable sheet. Good. The ventral exterior body 12F is configured such that the ventral upper elastic member 15FU and the ventral lower elastic member 15FD are sandwiched between the sheets constituting the ventral exterior body 12F. The dorsal exterior body 12R is also configured such that the dorsal upper elastic member 15RU and the dorsal lower elastic member 15RD are sandwiched between the seats constituting the dorsal exterior body 12R. These elastic members 15FU, 15FD, 15RU, 15RD are elastic bodies formed of one or more materials selected from natural rubber, synthetic rubber, urethane and the like, and are formed in a thread shape or a string shape. A plurality of elastic members 15FU, 15FD, 15RU, and 15RD are arranged in parallel with each other along the waist circumference direction.

The ventral exterior body 12F and the dorsal exterior body 12R are connected by an absorbent main body 16 constituting the inseam 10C. The absorbent body 16 has a rectangular shape with the front-rear direction as the longitudinal direction. As shown in FIG. 3, the absorbent main body 16 is superposed on the back sheet 17 having liquid impermeableness, the absorber 18, the top sheet 19 having liquid permeability, and the back sheet 17 on the outside. It is provided with a cover sheet 20 to be attached. In the diaper 10, the top sheet 19 is arranged inside the wearer 100 in contact with the skin, the back sheet 17 is arranged outside the absorber 18, and the cover sheet 20 covers the back sheet 17. It is placed on the outermost side. Then, in the absorbent main body 16, the cover sheet 20, the back sheet 17, the absorbent body 18, and the top sheet 19 are overlapped in this order from the outside.

The material forming the back sheet 17 is, for example, a film made of polyethylene resin having liquid impermeable property. The back sheet 17 preferably has a large number of micropores formed in order to ensure air permeability. The material forming the top sheet 19 and the cover sheet 20 is, for example, one or more materials selected from woven fabrics, non-woven fabrics, porous films and the like. Further, as the top sheet 19, for example, a liquid-permeable non-woven fabric composed of fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and which has been subjected to a hydrophilization treatment is used. .. Since the cover sheet 20 is the outermost sheet and is a sheet that touches the user, it is made of a non-woven fabric or the like that improves the feel of the touch.

The absorber 18 has an elongated band shape so as to straddle the front body 10F, the inseam 10C, and the back body 10R. The absorber 18 is composed of a molded body made of an absorbent material and a core wrap that wraps the molded body. The molded product of the absorbent material forming the absorbent body 18 is a molded product of an absorbent material such as fluff pulp, a highly absorbent polymer, or a hydrophilic sheet. The core wrap is made of tissue, non-woven fabric, or the like. Then, the absorber 18 is arranged and joined between the back sheet 17 and the top sheet 19. The absorber 18 extends between the ventral exterior 12F and the dorsal exterior 12R and includes a ventral end 18F and a dorsal end 18R. In the absorber 18, the core wrap may be omitted.

The back sheet 17, the top sheet 19, and the cover sheet 20 are sheets having a rectangular shape that is one size larger than the absorber 18, and the absorber 18 is arranged in the central region and is located at the peripheral portion of the absorber 18. There is no absorber 18. Both side edges of the absorbent body 16 in the front-rear direction are sheet side edges 18A in which the absorber 18 does not exist. As an example, the seat side edge portion 18A is formed by overlapping a back sheet 17, a top sheet 19, and a cover sheet 20. Further, the seat side edge portion 18A is configured, for example, by folding back both side edge portions extending in the front-rear direction of the cover sheet 20 inward. Further, the inner and outer surfaces of the regions overlapping the exterior bodies 12F and 12R in the front-rear direction of the absorbent body 16 are end regions 16A to which the sheets constituting the exterior body are adhered. The end region 16A is a front end portion and a rear end portion in the front-rear direction of the absorbent body 16, the ventral end portion 18F and the dorsal end portion 18R of the absorber 18, and peripheral portions of these end portions 18F and 18R. This is an area including 18B and the seat side edge portion 18A.

The ventral exterior body 12F includes a lateral band-shaped ventral upper region 12FU and a ventral lower region 12FD. The dorsal exterior body 12R also includes a horizontal band-shaped dorsal upper region 12RU and a dorsal lower region 12RD.

As shown in FIG. 2, in the ventral upper region 12FU and the dorsal upper region 12RU, the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are arranged inside the absorbent body 16, that is, on the top sheet 19 side. It constitutes a part of the waist circumference opening 10A and the waist circumference portion 10W. In the ventral lower region 12FD and the dorsal lower region 12RD, the ventral lower elastic member 15FD and the dorsal lower elastic member 15RD are arranged outside the absorbent main body 16, that is, on the back sheet 17 and the cover sheet 20 side. , Consists of a part of the waist circumference portion 10W.

In the ventral upper region 12FU, a plurality of ventral upper elastic members 15FU are arranged in the longitudinal direction between the seats (between the ventral outer seat portion 26F and the ventral inner seat portion 25F), and both left and right ends in the waist circumference direction. It is arranged in a stretched state over the portions. In the dorsal upper region 12RU, a plurality of dorsal upper elastic members 15RU are arranged in the dorsal direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) in the longitudinal direction. It is arranged in a stretched state over both left and right ends.

Further, in the ventral lower region 12FD, a plurality of ventral lower elastic members 15FD are arranged in the waist direction between the seats (between the ventral outer seat portion 26F and the ventral inner seat portion 25F) with the waist circumference direction as the longitudinal direction. It is arranged over the left and right ends. In the dorsal lower region 12RD, a plurality of dorsal lower elastic members 15RD are arranged in the dorsal direction between the seats (between the dorsal outer seat portion 26R and the dorsal inner seat portion 25R) in the longitudinal direction. It is arranged over the left and right ends. These elastic members 15FU, 15FD, 15RU, and 15RD form waist gathers on the upper side near the waist opening 10A and tammy gathers on the lower side near the inseam 10C in the waist circumference 10W, and abdominal leakage and back leakage. Suppress the occurrence of.

As shown in FIG. 3, the ventral lower region 12FD and the dorsal lower region 12RD are directly adhered to the cover sheet 20 of the end region 16A of the absorbent body 16. As shown in FIG. 2, the ventral lower elastic member 15FD is arranged on the end region 16A in a non-extended state, for example, a cut state. Further, most of the lower dorsal elastic members 15RD are arranged on the end region 16A in a non-extended state, for example, a cut state. As a result, the absorbent main body 16 suppresses the absorbent main body 16 from contracting in accordance with the contraction of the ventral lower elastic member 15FD and the dorsal lower elastic member 15RD, and forming folds on the absorbent main body 16. Can be done. Then, it is possible to suppress the formation of a gap between the absorbent main body 16 and the skin, and it is possible to suppress abdominal leakage and back leakage.

Among the plurality of dorsal lower elastic members 15RD, the plurality of dorsal lower elastic members 15RD1 located along the lower end of the dorsal upper region 12RU near the dorsal upper region 12RU are the dorsal side of the absorber 18. It is arranged on the end 18R in an extended state, that is, in an uncut state. Therefore, in the region where the dorsal lower elastic member 15RD1 is arranged, the fold 16B is formed at the dorsal end 18R. At the dorsal end 18R where the folds 16B are formed, the thickness of the absorber 18 is thicker than the region where the folds 16B are not formed, and the open end of the dorsal pocket 30R, which will be described later, is pushed by the buttocks and is difficult to close. Become. Further, the fold 16B can function as a guide to guide the dorsal pocket 30R. The dorsal lower elastic member 15RD may be in a state in which all of the elastic member 15RD is not extended, for example, in a cut state.

As shown in FIG. 3, the ventral upper region 12FU constitutes the ventral internal elastic portion 27F by sandwiching the ventral upper elastic member 15FU between the sheets (ventral outer seat portion 26F and ventral inner seat portion 25F). .. Further, the ventral lower region 12FD also constitutes a ventral external elastic portion 28F in which the ventral lower elastic member 15FD is sandwiched between the sheets (ventral outer seat portion 26F and ventral inner seat portion 25F). The ventral upper region 12FU and the ventral lower region 12FD are connected in a series by the ventral outer seat portion 26F and the ventral inner seat portion 25F.

The dorsal upper region 12RU constitutes the dorsal internal elastic portion 27R by sandwiching the dorsal upper elastic member 15RU between seats (dorsal outer seat portion 26R and dorsal inner seat portion 25R). Further, the dorsal lower region 12RD also constitutes the dorsal outer elastic portion 28R by sandwiching the dorsal lower elastic member 15RD between the seats (the dorsal outer seat portion 26R and the dorsal inner seat portion 25R). The dorsal upper region 12RU and the dorsal lower region 12RD are connected in a series by the dorsal outer seat portion 26R and the dorsal inner seat portion 25R.

The ventral outer seat portion 26F and the dorsal outer seat portion 26R are located on the outermost side opposite to the skin, and are bent inward at the waist circumference opening 10A and are located on the skin side. The ventral inner seat portion 25F and the dorsal inner seat portion 25R are seats facing the ventral outer seat portion 26F and the dorsal outer seat portion 26R.

The ventral outer seat portion 26F and the ventral inner seat portion 25F constituting the ventral internal elastic portion 27F sandwich the ventral upper elastic member 15FU and the ventral lower elastic member 15FD, and are bonded with the first adhesive 24. ing. The folded portion of the ventral outer seat portion 26F and the ventral inner seat portion 25F constitutes the waist circumference opening 10A, and the waist circumference opening 10A is formed by stacking two sheets to increase the strength (FIG. 3). Middle upper part A).

The dorsal outer seat portion 26R and the dorsal inner seat portion 25R constituting the dorsal inner elastic portion 27R sandwich the dorsal upper elastic member 15RU and the dorsal lower elastic member 15RD and are bonded with the first adhesive 24. ing. The folded portion of the dorsal outer seat portion 26R and the dorsal inner seat portion 25R constitutes a waist circumference opening 10A, and the waist circumference opening 10A is formed by stacking two sheets to increase the strength (in FIG. 3). Lower A part).

In the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R, the ventral internal seat portion 25F and the dorsal internal seat portion 25R adjacent to the ventral upper elastic member 15FU and the dorsal upper elastic member 15RU are end regions 16A. It is non-adhesive to the top sheet 19 of. Further, in the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R, in the region around the end region 16A, the ventral internal sheet portions 25F folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25. Will be done. Further, the cover sheet 20 of the end region 16A is also adhered to the ventral inner sheet portion 25F and the dorsal inner sheet portion 25R by the second adhesive 25.

Here, FIG. 4A is a plan view showing the adhesive region of the upper region corresponding to FIG. 2, and FIG. 4B is a plan view showing the adhesive region of the lower region corresponding to FIG. ..
As shown in FIGS. 3 and 4A, in the ventral upper region 12FU, the region where the cover sheet 20 of the end region 16A is adhered to the ventral inner sheet portion 25F by the second adhesive 25 is formed. It becomes the first adhesive region 22A. Further, in the dorsal upper region 12RU, the region where the cover sheet 20 of the end region 16A is adhered to the dorsal inner sheet portion 25R by the second adhesive 25 is the first adhesive region 22A.

Further, in the ventral internal elastic portion 27F in the ventral upper region 12FU, the ventral internal sheet portions 25F around the first adhesive region 22A and folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25. The region to be formed is the second adhesive region 22B. Further, in the dorsal internal elastic portion 27R in the dorsal upper region 12RU, the region where the dorsal inner sheet portions 25R folded back at the waist circumference opening 10A are adhered to each other by the second adhesive 25 is the second adhesive region 22B. Become. The second adhesive region 22B in the ventral internal elastic portion 27F and the dorsal internal elastic portion 27R has a concave shape facing the crotch lower portion 10C by being around the end region 16A. In the inner portion of the concave shape, the ventral inner sheet portion 25F of the ventral internal elastic portion 27F and the dorsal inner sheet portion 25R of the dorsal internal elastic portion 27R are not adhered to the top sheet 19 of the end region 16A. Become a department. As a result, a ventral pocket 30F is formed between the ventral internal seat portion 25F of the ventral internal elastic portion 27F and the top sheet 19 of the end region 16A. Further, a dorsal pocket 30R is formed between the dorsal inner seat portion 25R of the dorsal inner elastic portion 27R and the top sheet 19 of the end region 16A.

These pockets 30F and 30R have an open end on the crotch portion 10C side and are configured to accommodate excrement such as urine and stool that move in the direction of the abdomen and back. Further, the second adhesive region 22B is provided with a margin 34 having a predetermined width between the waist circumference opening 10A and the tip end portion in the front-rear direction of the end region 16A, and excrement contained in the pockets 30F and 30R can be collected. It suppresses leakage toward the waist circumference opening 10A.

Further, as shown in FIG. 4B, in the ventral lower region 12FD and the dorsal lower region 12RD, the ventral inner seat portion 25F and the dorsal inner seat of the ventral outer elastic portion 28F and the dorsal outer elastic portion 28R. The region where the portion 25R is adhered to the cover sheet 20 of the end region 16A is the third adhesion region 22C.

Here, the sizes of the ventral pocket 30F and the dorsal pocket 30R will be described. A large amount of liquid such as urine tends to flow into the ventral pocket 30F, and if it is too small, it causes abdominal leakage. Therefore, the ventral pocket 30F is made larger and deeper than the dorsal pocket 30R to secure a sufficient volume for accommodating excrement such as urine and suppress the occurrence of abdominal leakage. Then, when the diaper 10 is discarded, the ventral pocket 30F can be accommodated in a state in which a portion other than the ventral pocket 30F is rolled up. Further, the dorsal pocket 30R is smaller and shallower than the ventral pocket 30F, and the open end of the dorsal pocket is less likely to be closed by the buttocks.

As shown in FIG. 2, three-dimensional gathers 21 are arranged at both ends along the front-rear direction on the inner surface of the absorbent body 16, that is, on the top sheet 19. Each three-dimensional gather 21 includes a first elastic member 21E extending in the front-rear direction of the absorbent body 16 and a side sheet 21S sandwiching the first elastic member 21E. The first elastic member 21E is arranged with respect to the side sheet 21S in a state where a plurality of members are parallel to each other and in a state where a hot melt adhesive is applied and stretched, and the side sheet 21S is folded in half. It is sandwiched by the side sheet 21S. The first elastic member 21E is made of the same material as the elastic members 15FU, 15FD, 15RU, and 15RD. The side sheet 21S is also composed of a sheet similar to the top sheet 19 and the cover sheet 20, and is composed of, for example, a long sheet body extending in the front-rear direction including a non-woven fabric having liquid impermeable property.

The side seat 21S has a length straddling the ventral upper region 12FU, the inseam 10C, and the dorsal upper region 12RU in the anteroposterior direction. The first elastic member 21E is shorter than the length of the side sheet 21S in the front-rear direction, and has a length straddling the ventral lower region 12FD, the crotch lower region 10C, and the dorsal lower region 12RD as an example.

Further, the seat side edge portion 18A of the absorbent main body 16 is configured by folding both side edge portions along the front-rear direction of the cover sheet 20 toward the center side. As shown in FIG. 2, and the folded seat side edge 18A includes a leg gather 23. The leg gather 23 is configured by sandwiching a second elastic member 23E extending in the front-rear direction of the absorbent body 16 at the seat side edge portion 18A.

The second elastic member 23E also extends from the ventral lower region 12FD to the dorsal lower region 12RD via the inseam 10C in a state where a plurality of the second elastic members 23E are parallel to each other and are stretched by applying the hot melt adhesive. Is postponed.

By the way, as shown in FIG. 2, the diaper 10 is intended for young children. Therefore, in a state where the joint portion 11 between the front body 10F and the back body 10R is unwound and unfolded, the upper end portion and the back body 10R of the ventral exterior body 12F constituting the front body 10F constituting the waist circumference opening 10A are formed. The distance L1 from the upper end of the dorsal exterior body 12R is 400 mm or less so that the wearer 100 of a young child in the developmental stage who can flutter his legs can wear it. The upper limit of 400 mm is also a size that can be worn by middle-aged children and older children because there are individual differences in growth. Further, the lower limit of the distance L1 is preferably 300 mm according to the wearer 100 of a newborn baby or an infant.

Further, the distance L2 between the ventral lower elastic member 15FDX on the most crotch 10C side in the ventral exterior body 12F and the dorsal lower elastic member 15RDX on the most crotch 10C side in the dorsal exterior 12R is 34% or more of the distance L1. Is. When the distance L2 is less than 34% of the distance L1, the leg circumference opening 10L becomes too small, and when the diaper 10 is put on by a young child, the leg portion of the wearer 100 is the peripheral edge of the leg circumference opening 10L. This is because it is easy to get caught in the part. Further, the distance L2 is 64% or less of the distance L1. This is because when the distance L2 is larger than 64% of the distance L1, the fit of the wearer 100 to the rat neck is deteriorated when the diaper 10 is worn by a young child, and lateral leakage is likely to occur. Further, from the viewpoint of suppressing lateral leakage, the distance L2 is preferably 49% or less of the distance L1.

Further, in the portion constituting the leg circumference opening 10L, the distance L3 between the side edge portion along the front-rear direction of the absorbent body 16 constituting the inseam 10C and both ends of the front body 10F and the back body 10R in the waist circumference direction. Is 26% or more of the distance L2. When the distance L3 is less than 26% of the distance L2, the leg circumference opening 10L becomes too small, and when the diaper 10 is put on by a young child, the leg portion of the wearer 100 is the peripheral edge of the leg circumference opening 10L. This is because it is easy to get caught in the part. Further, the distance L3 is 56% or less of the distance L2. It is desirable to set the distance L3 large from the viewpoint of ease of putting it on for young children, but if it is too large, the fit of the wearer 100 to the cervical neck of the wearer 100 when the diaper 10 is put on for young children. The sex deteriorates and it becomes easy to leak sideways. However, if the distance L3 is 56% or less of the distance L2, the elastic members 15FD, 15FU, 15RD, and 15RU fit the groin neck of the wearer 100 when the diaper 10 is worn by a young child. Can be made to. Therefore, the distance L3 is such that when the diaper 10 is worn by a young child, the leg circumference opening 10L is fitted to the groin neck of the wearer 100 by the contraction force of the elastic members 15FD, 15FU, 15RD, and 15RU. The range is set to 56% or less of the distance L2. As a result, it is possible to achieve both ease of wearing on young children and suppression of lateral leakage when worn on young children. When the distance L3 is larger than 56% of the distance L2, even if the waist circumference is contracted by the elastic members 15FD, 15FU, 15RD, 15RU while the diaper 10 is worn by a young child, the neck of the wearer 100 The fit to the part is impaired, and lateral leakage is likely to occur. Further, from the viewpoint of ease of putting on the young child and the fit of the wearer 100 to the rat neck when the diaper 10 is put on the young child, the distance L3 is 41% or more of the distance L2. Is more preferable.

Next, the action of the diaper 10 configured as described above will be described.
The preferred wearer 100 of the diaper 10 is preferably a young child in the developmental stage in which the legs are fluttering, and the legs such as frog legs are toes with respect to the leg opening 10L through the waist opening 10A. Is inserted from. Then, in the diaper 10, the front body 10F and the back body 10R contract in the waist direction due to the waist gather and the tammy gather, and fit the abdomen and the back of the wearer 100. Further, the leg circumference opening 10L is fitted around the leg circumference by the leg gather 23.

As described above, according to the above embodiment, the effects listed below can be obtained.
(1) By setting the distance L1 to 400 mm or less, the diaper 10 can be made a size that can be worn mainly by young children. Further, by setting the distance L1 to 300 mm or more, it is possible to provide a pants-type diaper that can be widely worn even to a wearer of a young child such as an infant.

(2) By setting the distance L2 to 34% or more of the distance L1, the leg circumference opening 10L becomes large, and when the diaper 10 is put on by a younger child, the leg of the younger child becomes the leg circumference opening 10L. It can be inserted smoothly, and the diaper 10 can be smoothly put on by a young child.
(3) By setting the distance L2 to 64% or less of L1, the fit of the wearer 100 to the rat neck is improved and lateral leakage is suppressed when the diaper 10 is worn by a young child. Can be done. Further, when the distance L2 is 49% or less of the distance L1, the fit of the wearer 100 to the rat neck is further improved and the lateral leakage is further suppressed when the diaper 10 is worn by a young child. be able to.

(4) By setting the distance L3 to 26% or more of the distance L2, the leg circumference opening 10L has an appropriate depth, and the dimensions of the front body 10F and the back body 10R in the waist direction become too small. It can be suppressed. Further, by setting the distance L3 to 41% or more of the distance L2, the legs of the wearer 100 can be smoothly inserted through the leg circumference opening 10L when the diaper 10 is put on by a young child, and the young age can be inserted. Ease of putting on children is improved.

(5) By setting the distance L3 to 56% or less of L2, it is possible to prevent the size of the leg circumference opening 10L from becoming too large. The leg circumference opening 10L can be increased within a range of a distance L3 of 56% or less of L2, and when the diaper 10 is put on by a young child, the leg portion of the wearer 100 is placed on the toe with respect to the leg circumference opening 10L. It becomes easy to insert from. Then, even if the distance L3 is increased, the waist gather and the tammy gather reduce the size of the leg circumference opening 10L, so that the deterioration of the fit of the wearer 100 to the rat neck can be suppressed.
(6) In the diaper 10 composed of the ventral exterior body 12F, the dorsal exterior body 12R, and the absorbent body 16, the size and shape of the leg circumference opening 10L can be optimized.

It should be noted that each of the above embodiments can be appropriately modified and implemented as follows.
-As a pants-type diaper, it can also be applied to a two-piece structure consisting of an absorbent body and an exterior body in which the ventral side and the back side are connected at the inseam.

The ventral outer seat portion 26F and the ventral inner seat portion 25F that sandwich the ventral upper elastic member 15FU and the ventral lower elastic member 15FD do not have to be connected at the waist circumference opening 10A (part A), and the abdomen may be connected. Only one of the seat elements of the side outer seat portion 26F and the ventral inner seat portion 25F may be connected.

-The diaper 10 may be divided into at least one of the front body 10F and the back body 10R into an upper region and a lower region, and both the front body 10F and the back body 10R are divided into an upper region and a lower region. It does not have to be.

10 ... diaper, 10A ... waist opening, 10C ... crotch, 10F ... front body, 10L ... leg opening, 10R ... back body, 10W ... waist, 11 ... joint, 12F ... ventral exterior, 12FD ... ventral lower region, 12FU ... ventral upper region, 12R ... dorsal exterior, 12RD ... dorsal lower region, 12RU ... dorsal upper region, 15FD, 15FDX ... ventral lower elastic member, 15FU ... ventral upper elastic Members, 15RD, 15RD1, 15RDX ... Dorsal lower elastic member, 15RU ... Dorsal upper elastic member, 16 ... Absorbent body, 16A ... End region, 17 ... Back sheet, 18 ... Absorber, 18A ... Seat side edge , 18B ... peripheral part, 18F ... ventral end, 18R ... dorsal end, 19 ... top sheet, 20 ... cover sheet, 21 ... three-dimensional gather, 21E ... first elastic member, 21S ... side sheet, 22A ... first 1 adhesive area, 22B ... 2nd adhesive area, 22C ... 3rd adhesive area, 23 ... leg gather, 23E ... 2nd elastic member, 24 ... 1st adhesive, 25 ... 2nd adhesive, 25F ... ventral inner sheet portion , 25R ... dorsal internal seat, 26F ... ventral external seat, 26R ... dorsal external seat, 27F ... ventral internal elastic, 27R ... dorsal internal elastic, 28F ... ventral external elastic, 28R ... dorsal external elastic part, 30F ... ventral pocket, 30R ... dorsal pocket, 34 ... margin, 100 ... wearer, L1, L2, L3 ... distance.

Claims (2)

It includes a front body that covers the abdomen of the wearer, a back body that covers the back of the wearer, and an inseam that straddles the front body and the back body and covers the inseam of the wearer.
The front body and the back body are provided with a plurality of elastic members parallel to each other in the waist direction.
In a state where both ends of the front body and the back body in the waist direction are joined, the front body and the upper end of the back body form a waist circumference opening, and the lower ends of the front body and the back body and the upper end of the back body are described. The side edge of the inseam forms an opening around the legs,
The front body is composed of the first exterior body.
The back body is composed of a second exterior body.
The inseam is composed of an absorbent body.
The absorbent body has an end region in the front-rear direction that overlaps the first exterior body and the second exterior body.
At least one of the first exterior body and the second exterior body includes an upper region constituting a waist circumference portion and a lower region located below the upper region.
The upper region comprises an internal elastic portion located inside the end region.
The lower region comprises an external elastic portion that is located outside the end region and is adhered to the outer surface of the end region.
The internal elastic portion is non-adhesive in a region overlapping the end region, and is adhered to a sheet portion located outside the end region around the end region.
A pocket with the open end on the inseam side is formed between the internal elastic portion and the end region.
In the state where the front body and the back body are unbonded and unfolded,
The distance L1 between the upper end of the front body and the upper end of the back body is 300 mm or more and 400 mm or less.
The distance L2 between the elastic member on the most inseam side of the front body and the elastic member on the most inseam side on the back body is 34% or more and 49% or less of the distance L1.
The distance L3 between the side edge of the inseam and both ends of the front body and the back body in the waist direction is 26% or more and 56% or less of the distance L2 at the portion constituting the leg circumference opening. Pants-type diapers that are. The pants-type diaper according to claim 1, wherein the distance L3 is 41% or more of the distance L2.

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