JP2002113040A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper formed like trunks, extremely easy to wear and having an excellent leakage preventing performance and a design. SOLUTION: This developed type throwaway diaper 1 with elastic members disposed at leg flap parts 6, 6 in a crotch region C is so constituted that (1) the ratio L1/L2 of the minimum width L1 of the crotch region which is two inner regions out of four regions equally divided in the longitudinal direction of the diaper, to the maximum width L2 of the diaper, (2) the ratio L3/L1 of the shortest distance L3 between the innermost side edge of the elastic member and the outer side edge of the leg flap part in the crotch region C, to the minimum width L1 of the crotch region, and (3) the ratio L4/L5 of the cross direction distance L4 between an outermost point P1 and an innermost point P2 of the outer side edge 61 of the leg flap part 6 in the crotch region C, to the longitudinal length L5 of the crotch region C, are respectively in specific ranges.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a trunk-like form when mounted, and is excellent in leakproof performance and design.
The present invention also relates to a disposable diaper that can be easily worn.

[0002]

2. Description of the Related Art
2. Description of the Related Art A disposable disposable diaper having a trunk-like configuration when worn is known. Such a trunks-like form not only improves the leakage prevention performance, but also has an excellent design such that its appearance gives a user and the like an excellent leakage prevention performance. However, such a conventional disposable diaper has a problem in that a portion disposed around the leg is caught on a crotch or the like at the time of wearing, so that it is difficult to wear the disposable diaper.

Accordingly, it is an object of the present invention to provide a disposable diaper which has a trunk-like shape when worn, has excellent leak-proof performance and design, and is easy to wear.

[0004]

The present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the two sheets, and is substantially vertically elongated. In a deployable disposable diaper in which a leg elastic member is disposed along a longitudinal direction of a diaper on a leg flap portion located outside both side edges in a longitudinal direction of the absorber, the disposable diaper is disposed in a longitudinal direction. A minimum width L1 of a crotch region, which is an inner two region of the four regions divided into four, and
The ratio (L1 / L2) to the maximum width L2 of the disposable diaper is 0.4 to 0.8, and between the innermost edge of the leg elastic member and the outer edge of the leg flap portion in the crotch region. And the minimum width L1 of the crotch region
(L3 / L1) is 0.1 to 0.25, and the distance L4 in the width direction between the outermost point and the innermost point of the outer edge of the leg flap portion in the crotch region; The ratio (L4 / L5) to the length L5 of the inseam region in the longitudinal direction is 0 to 0
The above object has been achieved by providing a disposable diaper which is 0.2.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on preferred embodiments. As shown in FIGS. 1 to 3, the disposable diaper 1 of the first embodiment has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid retaining property interposed between the sheets 2 and 3. Fastening tapes 5 and 5 are provided on both side edges of a back side area A arranged on the back side of the wearer at the time of wearing. It is a deployed disposable diaper that is provided.

The outer shape of the disposable diaper 1 of the present embodiment has a substantially hourglass shape in which a central portion in the longitudinal direction is narrowed narrowly.
Each has an outer shape equal to the outer shape of the diaper. The central absorbent body 4 as a liquid-retentive absorbent body is interposed between the top sheet 2 and the back sheet 3 at the center in the width direction of the disposable diaper 1, and has an hourglass shape in which the central part in the longitudinal direction is constricted. Have.

The top sheet 2 and the back sheet 3 respectively extend outward in the width direction from both side edges 41, 41 in the longitudinal direction of the absorber 4, and the extended portions correspond to both longitudinal sides of the diaper. The leg flap portions 6, 6 are formed on the front side. Also, an abdominal region B arranged on the abdomen of the wearer when worn
Is provided with a landing zone 9 for fastening the fastening tapes 5 and 5 to the outer surface.

Thus, in the disposable diaper 1 of the present embodiment, the disposable diaper 1 is divided into four equal parts in the longitudinal direction.
Width L of the crotch region C, which is the inner two regions of the two regions
1 to the maximum width L2 of the disposable diaper (L1 / L
2) is 0.4 to 0.8, more preferably 0.5 to 0.8.
5 to 0.75. When the ratio (L1 / L2) is less than 0.4, it is difficult to achieve a sufficient absorption performance because the absorber arrangement area is small, and in particular, when a trunks-like configuration is used, the absorber is substantially used. It is difficult to secure the installation area, and the ears of the side flaps may open during transportation in the machining process and flutter (decrease in workability).
And the like. If the ratio (L1 / L2) is more than 0.8, it is inevitable that the wearability deteriorates.

In FIG. 1, dashed lines Q1, Q, and Q2 are lines dividing the disposable diaper 1 into four equal parts in the longitudinal direction.
R4 is a region obtained by dividing the disposable diaper into four equal parts in the longitudinal direction. The crotch region C is a region in which the region R2 and the region R3 are combined. In addition, the dimensions and ratios of each part in the present specification are dimensions measured in a state (tensed state) in which the diaper is spread in a plane as shown in FIG. 1 and a ratio based on the dimensions.

[0010] In the disposable diaper 1 of the present embodiment, the back waist edge (the back edge of the waist opening formed at the time of wearing) in the four regions obtained by dividing the diaper 1 into four in the longitudinal direction. (The part forming the part) The maximum width L2 and the ventral waist edge (part forming the ventral opening edge of the waist opening formed when worn) in the dorsal area A which is the area on the 11th side The maximum width L6 in the abdominal region B, which is the region, is preferably L2> L6 from the viewpoint of wearability, and in this case, the minimum width L1 of the crotch region C
And the ratio (L1 / L2) of the maximum width L2 of the back side area A to 0.
4 to 0.8, and the ratio (L1 / L6) of the minimum width L1 of the crotch region C to the maximum width L6 of the abdominal region B is 0.5 to 0.9.
It is preferable that

In the disposable diaper 1, a plurality of legs along the longitudinal direction of the diaper are provided on leg flaps 6, 6 located on both sides 41, 41 in the longitudinal direction of the central absorbent body 4, respectively. Part elastic members 7a to 7d are arranged. The ratio (L3 / L1) of the shortest distance L3 between the innermost edge 71 of the leg elastic member and the outer edge 61 of the leg flap portion 6 in the crotch region C and the minimum width L1 of the crotch region C. Is 0.1 to 0.25. When the ratio (L3 / L1) is within the above range, as shown in FIG. 4, in a state where the diaper is worn, a portion located in the crotch region C and located outside the inner edge 71 of the leg elastic member in the width direction. Has a form that wraps around the thigh of the wearer, and has a trunk-like form. As a result, the distance of the excrement leakage path is lengthened, the leakage prevention effect is improved, and a user or a caregiver is given an excellent impression of leakage prevention performance, and the appearance is also excellent in design. The ratio (L3 / L
If 1) is less than 0.1, the trunks-like form will not be obtained, and if the ratio (L3 / L1) is more than 0.25, the leg flap portion will be attached to the inseam and thigh portion when worn. , It becomes difficult to attach.

Here, the leg elastic member is an elastic member arranged along the longitudinal direction of the diaper on leg flaps formed on both sides of the crotch region C. When only one leg elastic member is disposed on the leg flap portion, the edge 71 is the inner edge of the leg elastic member in the diaper width direction, and as in the disposable diaper 1, In the case where a plurality of leg elastic members 7a to 7d are arranged on the flap, these are the inner edges in the diaper width direction of the leg elastic members 7a arranged on the inner side of the diaper.

In the disposable diaper 1, the ratio (L3 / L1) is more preferably from 0.13 to 0.20 from the viewpoint of trunks-like form and improvement of ease of wearing. In addition, from the same viewpoint, the innermost edge 71 of the leg elastic member in the crotch region C and the leg flap 6
The shortest distance L3 between the outer edge 61 and the outer edge 61 is 45 to 100 mm.
It is preferable that In addition, from the viewpoint of improving the fit in the crotch region, the leg flap portions 6 of the crotch region C have a plurality of leg portions elastic so that gathers are formed over the entire width of the leg flap portion 6. It is preferable that the members 7a to 7d are arranged at predetermined intervals.

In the present disposable diaper 1, the width L4 between the outermost point P1 and the innermost point P2 of the outer edge 61 of the leg flap portion 6 in the crotch region C is determined.
To the length L5 of the crotch region C in the longitudinal direction (L4 /
L5) is 0 to 0.2. The ratio (L4 / L5) is:
If it is more than 0.2, the leg flap portion will be caught on the inseam and thigh portion during mounting, making it difficult to mount.

Here, the outer edge 61 of the leg flap portion 6
Is the point on the outer edge 61 where the distance from the center line (not shown) bisecting the disposable diaper in the width direction is the largest, and the innermost point P2 of the outer edge 61 is Is a point on the outer edge 61 at which the distance from the center line is the smallest. The distance L4 in the width direction between the outermost point P1 and the innermost point P2 is determined from the distance from the center line, which bisects the diaper in the width direction, to the outermost point P1, from the center line to the innermost point P2. Obtained by reducing the distance to The ratio (L4 /
L5) is 0 when the outer edge 61 of the leg flap portion 6 in the crotch region C forms a straight line parallel to the diaper longitudinal direction over the entire length of the crotch region C in the longitudinal direction. A diaper having various forms is also a preferred embodiment of the present invention.

A more preferable ratio (L4 / L5) is 0 to
0.17. When the ratio (L4 / L5) is less than 0.17, the shortest distance L3 between the innermost edge 71 of the leg elastic member and the outer edge 61 of the leg flap 6 in the crotch region C is 55 to 100 mm. Even in the case of, extremely good mounting properties can be obtained. That is, in the conventional disposable diaper, the shortest distance L3 is 55 m.
m or more, the catch at the inseam and thighs became large, and the wearability was extremely deteriorated, but the ratio (L4 / L)
When 5) is 0 to 0.17, such deterioration of the mounting property can be significantly prevented.

Further, in the disposable diaper 1 of the first embodiment, the outermost point P1 of the outer edge 61 of the leg flap portion 6 in the crotch region C is determined by dividing the disposable diaper 1 into two in the longitudinal direction. In the dorsal region (the regions R1 and R2).

In the disposable diaper 1 of this embodiment, two pairs of fastening tapes 5 and 5 are provided, but only one pair or three or more pairs may be provided. However, when a pair of fastening tapes is provided, the back waist edge 11
It is preferable to dispose a waist elastic member 13 for forming waist gathers along. When the maximum width of the disposable diaper 1 is measured, as shown in FIG. 1, the measurement is performed in a state where the fastening tape 5 is bent inward.

In the disposable diaper 1, the second absorbers 8, 8 having a predetermined width are provided on at least a part of each of the leg flap portions 6 in the crotch region C. More specifically, the liquid-absorbing second absorbers 8, 8 are disposed outside the side edges 41, 41 of the central absorber 4 in the crotch region C, and are separated from the side edges 41, 41, respectively. Have been. Each of the second absorbers 8 has a band shape, and is disposed along the longitudinal direction of the diaper 1. The second absorber 8 in the crotch region C has a width substantially equal over the entire region in the longitudinal direction, and is arranged so that the longitudinal direction matches the longitudinal direction of the diaper 1.

The second absorber 8 may be disposed at least partially on each of the leg flap portions 6. However, when the wearer of the diaper excretes urine or the like while lying down,
Since the excrement that has passed through the central absorbent body 4 may reach not only the leg flap portions 6 and 6 in the crotch region C but also the flap portions in the back and abdominal regions, the second absorbent body 8 includes the crotch region. From C to abdominal flap portion (portion located on the left and right side edges of central absorbent body 4 in ventral region B)
And the back flap portion (the central absorber 4 in the back region A)
Is preferably disposed over at least one of the outer right and left side edges of the crotch region C, and is disposed from the crotch region C to both the abdominal flap portion and the dorsal flap portion. Is more preferable.

In the disposable diaper 1, a plurality of leg elastic members 7a to 7d are provided on each leg flap portion 6, and some of the leg elastic members 7a and 7b are provided with a plurality of leg elastic members 7a and 7b. The second leg elastic members 7c and 7d are disposed on the leg flaps located outside the region 6A where the second absorber 8 is disposed in the width direction. ing. Here, the area 6A in which the second absorbent body 8 is disposed is defined as the second absorbent body 8, 8 disposed inside the thickness direction when the disposable diaper is in a developed state as shown in FIG. Area. Leg elastic members 7a and 7b in the disposable diaper 1 of the first embodiment.
Is disposed between the second absorber 8 and the back sheet 3.

In the disposable diaper of the present invention,
The topsheet 2 disposed on the central absorber 4 is
It is preferable that the surface sheet 2 extending outward in the width direction from both side edges of the second absorbent body 8 covers at least the inner edge of each of the second absorbent bodies 8, 8. In order to prevent the liquid from seeping out, the outer edge of the second absorber 8 is preferably covered with a liquid-impermeable sheet.

The material for forming each part of the disposable diaper 1 of the present embodiment will be described. The material for forming the top sheet 2, the back sheet 3, the central absorber 4, the fastening tape 5 and the landing zone 9 is a conventional disposable diaper. Various kinds of diapers can be used without particular limitation.

Various materials such as natural rubber, synthetic rubber, and spandex can be used as the material for forming the leg elastic members 7a to 7d and the waist elastic member 13. Various types such as a film can be used. In particular, the leg elastic members 7a to 7d are preferably made of thread rubber or flat rubber, particularly flat rubber, from the viewpoints of contractility of the underbody, workability, and cost.

The second absorbent body 8 may be any of various structures conventionally used as absorbent bodies such as disposable diapers without any particular limitation. For example, hydrophilic materials such as rayon and cellulose may be used. A collection of fibers,
An aggregate obtained by subjecting synthetic fibers such as polyethylene and polypropylene to a surface treatment, and an aggregate obtained by retaining a water-absorbing polymer in these aggregates can be used.

The disposable diaper 1 of the present embodiment can be used by being worn on a wearer in the same manner as a normal deployable disposable diaper. According to the disposable diaper 1 of the present embodiment, the ratio (L1 / L2) and the ratio (L3 / L)
1) and the ratio (L4 / L5) are within the above specific ranges, respectively, so that the form in the mounted state becomes a trunks-like form as shown in FIG. 4 to improve the leakproof effect and the design. And there are no drawbacks such as the difficulty in wearing the conventional disposable diapers like trunks.

Further, in the disposable diaper according to the present embodiment, it is possible to obtain good wearing properties, and the leg flap portions 6, 6 which could not be used conventionally because of the deterioration of the wearing properties.
In addition, the second absorber 8 as described above can be provided. The second absorber 8 can improve the fit around the leg, and can more effectively prevent leakage from the leg. In particular, in the disposable diaper 1 of the present embodiment, since the leg elastic members 7a and 7b are arranged in the area 6A where the second absorbent body 8 is arranged, the second absorbent body 8 is arranged when worn. As shown in FIG. 3, the skin side surface of the area 6 </ b> A is in good contact with the wearer M's leg, so that even if urine or the like leaks to the side of the central absorber 4, the side edge of the diaper Without being reached by the second absorbent body 8 without reaching the portion. As a result, leakage of excrement, particularly leakage of urine from around the legs is more reliably prevented.

Further, in the disposable diaper 1 of the first embodiment, the leg elastic members 7a, 7b are not disposed in the region 6B between the central absorber 4 and the second absorbers 8, 8. The contraction force of the leg elastic member disposed outward in the width direction from the region 6B is absorbed and buffered by the region 6B. Therefore, it is excellent in the fitting property, the absorbing performance, the pad storing property when the absorbing pad is used in combination, and the like.

From the viewpoint that the effect of improving the fitting property and the effect of preventing leakage are more remarkably exhibited, the second absorber 8 is made of
The width L7 is preferably 1 to 10 cm, particularly preferably 2 to 5 cm, and the ratio (L7 / L1) of the width L7 to the minimum width L1 of the crotch region C is preferably 0.02 to 0.3. . Also, the width L8 of the central absorber 4 is 5 to 25c.
m, and the ratio (L8 / L1) of the width L8 to the minimum width L1 of the crotch region C is preferably 0.1 to 0.8.

FIGS. 5 to 7 show a disposable diaper 1 'as a second embodiment of the present invention. About the disposable diaper 1 'of 2nd Embodiment, the difference from the diaper 1 of 1st Embodiment is demonstrated. The points that are not particularly described are the same as those of the first embodiment, and the above description is appropriately applied.

In the disposable diaper 1 'of the second embodiment, the outermost point P1 of the outer edge 61 of the leg flap portion 6 in the crotch region C is determined by dividing the disposable diaper 1 into two in the longitudinal direction. Region (the region R1)
And R2). With this configuration, when the fastening tapes 5 and 5 are pulled to attach the diaper, the back crotch region (the region R2) is further prevented from being caught on the dorsal thigh portion, and the wearability is further improved. It will be. Further, in the disposable diaper 1 ′, a plurality of leg elastic members 7 a to 7, which are arranged on each leg flap 6.
7d, a part of the leg elastic members 7d is arranged in the area 6A where the second absorber 8 is arranged, and the other part of the leg elastic members 7a to 7c are formed by the central absorber 4 and the second absorbent body. 8 in an area 6B.

The present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist of the present invention. For example, the second absorber 8
The second absorber 8 may be arranged in a manner that the central absorber 4 and the second absorber 8 are adjacent to each other via a slit without being separated from each other. The second absorber 8 may be integrally connected to the central absorber 4 in the dorsal region A and / or the abdominal region B. The form in which the second absorbent body 8 is integrally connected to the central absorbent body 4 in the dorsal region A and / or the ventral region B has a good fit, a good fit in the inseam,
It is excellent also from the viewpoint of further improving the leakage prevention in the back region A and / or the ventral region B.

When the central absorber 4 and the second absorber 8 are spaced apart from each other, the central absorber 4
It is preferable that an absorbent material having a smaller weight per unit area than the second absorber 8 is provided from the viewpoint of leakproofness and fit. Examples of the absorbent material include a pulp layer, a pulp polymer layer, a hydrophilic nonwoven fabric, a pulp sheet (backing sheet), and the like. These are disposed, for example, between the top sheet 2 and the back sheet 3 in the region 6B. You. When the leg elastic member is disposed in the region 6B, the extension ratio is made smaller than that of the leg elastic member disposed in another region so that the central absorber 4 is not excessively distorted. It is preferable to dispose them so as to have a weak contraction force.

Further, the layer structure of the leg flap portion is not limited to those of the above-mentioned embodiments, and is constituted by, for example, another single or plural sheets instead of the top sheet 2 and / or the back sheet 3. Or both sheets 2,
In addition to 3, other sheets or non-sheet materials may be provided.

The area 6A in which the second absorber 8 is provided
And the leg elastic members 7a and 7b in the area 6A where the second absorbent body 8 is disposed are provided between the top sheet 2 and the second absorbent body 8 in the form in which the leg elastic members 7a and 7b are not disposed. It is also possible to adopt a mode in which it is disposed inside the second absorber 8 or on the outer surface of the back sheet 3 or the like.

In addition, the number of leg elastic members provided on each leg flap may be plural or one. Furthermore, the shape, size, forming material, etc. of each part of the disposable diaper can be appropriately changed. In addition, the disposable diaper of the present invention is particularly suitable as a diaper for adults, and when used, an auxiliary absorbent may be used together.

As a method of forming the central absorbent and the second absorbent, the central absorbent and the second absorbent are separately supplied, and a slit is formed in the entire length of the central absorbent or at least in the crotch region along the longitudinal direction. The width direction both ends of the wide absorbent material facing the inner side of the diaper, forming an area having a small weight per unit area along the longitudinal direction in the entire length or at least the inseam area of the central absorbent body, or embossing, facing the inner side of the diaper It is folded back on its one side and laminated,
It is conceivable to laminate an absorbent material having a small width so that a predetermined gap is formed between the two laminated portions at a central portion and an inner side edge portion of each laminated portion. When the central absorber and the second absorber are formed as described above, the region B becomes a bent region, the second absorber is surely bent to the thigh side, and the fit of the inseam thigh and the leakage prevention are provided. The appearance of trunks is improved. In the above method, the portion made of the two-layer absorbent material formed at the central portion constitutes the central absorber, and the portion made of the two-layer absorbent material formed at both ends is the second absorbent material. Make up the body.

[0038]

EXAMPLES (Examples 1 to 3) Disposable diapers having the dimensions and ratios shown in Table 1 and having the form shown in FIGS. 1 and 2 (Example 1) and disposable diapers having the form shown in FIGS. Example 2) was prepared. In addition, a disposable diaper having the dimensions and ratios shown in Table 1 and having no second absorber (Example 3) was prepared.

(Comparative Examples 1 to 4) Regarding commercially available diapers,
The dimensions of each part were measured by the same measuring method as in the example, and the ratio (L1 / L2), the ratio (L3 / L1), and the ratio (L4 / L5) were calculated in the same manner.
The results are shown in Table 1.

(Comparative Examples 5 to 7) A disposable diaper (Comparative Example 5) was prepared in the same manner as in Example 1 except that L4 in the disposable diaper of Example 1 was changed from 57 to 100. A disposable diaper (Comparative Example 6) was prepared in the same manner as in Example 1 except that L3 in the disposable diaper of Example 1 was changed from 65 to 40. A disposable diaper (Comparative Example 7) was prepared in the same manner as in Example 1 except that L4 in the disposable diaper of Example 1 was changed from 57 to 100 and L3 was changed from 65 to 40.

(Evaluation) The disposable diapers of Examples 1 to 3 and Comparative Examples 1 to 7 were subjected to a use test by an adult monitor of 10 persons, respectively. or not,
Ease of installation, leak prevention, and fit were evaluated. The evaluation results are also shown in Table 1.

(Evaluation Criteria)-Whether or not to be in Trunks-like form; Δ: Neither of these (if you don't do it at the time of wearing, it will look like trunks). ×: Obviously not in trunks-like form.

Ease of mounting; ○: easy (8 or more respondents answered that it was easy) △: Neither of the above (5 to 7 respondents answered easy) ×: Not easy (4 or less respondents answered easy)

Leak prevention: Each diaper was placed on a human body model in a lying state, and 150 g / time of physiological saline was discharged from the crotch part, and the number of leaks from the crotch part was evaluated. ◎; 4 times or more ○; 3 times △; 2 times ×; 1 time

Fitness: Whether the fit around the leg was satisfactory or not was evaluated, and the evaluation was made based on the number of monitors who answered that they were satisfied. ◎: 9 or more satisfied. ；: 7 to 8 satisfied. Δ: 5-6 satisfied. ×: 4 or less satisfied.

[0046]

[Table 1]

From the results shown in Table 1, it can be seen that the disposable diaper of the present invention has a trunk-like form when worn, has excellent leak-proof performance and design properties, and is extremely easy to wear. On the other hand, the diaper of the comparative example does not have a trunks-like form or a trunks-like form because any ratio is not within the scope of the present invention.
It is difficult to attach.

[0048]

The disposable diaper of the present invention has a trunk-like form when worn, has excellent leak-proof performance and design properties, and is extremely easy to wear.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing a disposable diaper as a first embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a section taken along line XX of FIG. 1;

FIG. 3 is a cross-sectional view schematically showing a disposable diaper according to the first embodiment in a mounted state.

FIG. 4 is a schematic view showing a disposable diaper trunks-like mounting state of the first embodiment.

FIG. 5 is a partially cutaway plan view showing a disposable diaper as a second embodiment of the present invention.

FIG. 6 is a sectional view schematically showing a section taken along line XX of FIG. 5;

FIG. 7 is a cross-sectional view schematically illustrating a disposable diaper according to a second embodiment in a mounted state.

[Explanation of symbols]

 1, 1 'disposable diaper 2 top sheet 3 back sheet 4 central absorber (absorber) 5 fastening tape 6 leg flap section 61 outer edge of leg flap section 7a to 7d leg section elastic member 71 innermost edge of leg section elastic member A dorsal area B ventral area C inseam area M wearer 6A area where the second absorber is arranged

Claims (5)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the sheets, are substantially vertically elongated, and extend in the longitudinal direction of the absorber. In a deployable disposable diaper in which a leg elastic member is disposed along a longitudinal direction of the diaper on leg flaps located outside of both side edges, four regions obtained by dividing the disposable diaper into four in the longitudinal direction. The ratio (L1 / L2) of the minimum width L1 of the crotch region, which is the inner two regions, to the maximum width L2 of the disposable diaper is 0.4.
0.8, the shortest distance L between the innermost edge of the leg elastic member and the outer edge of the leg flap portion in the crotch region.
3 and a ratio (L3 / L1) of a minimum width L1 of the crotch region is 0.1 to 0.25, and a ratio between an outermost point and an innermost point of an outer edge of the leg flap portion in the crotch region. A disposable diaper in which a ratio (L4 / L5) of a distance L4 in a width direction therebetween to a length L5 in a longitudinal direction of the crotch region is 0 to 0.2. 2. The disposable diaper according to claim 1, wherein a shortest distance L3 between an innermost edge of the leg elastic member and an outer edge of the leg flap in the crotch region is 45 to 100 mm. 3. A shortest distance L3 between an innermost edge of the leg elastic member and an outer edge of the leg flap portion in the crotch region is 55 to 100 mm, and the leg flap portion in the crotch region is The ratio (L4 / L5) of the distance L4 in the width direction between the outermost point and the innermost point of the outer edge to the length L5 in the longitudinal direction of the crotch region is 0-0.
The disposable diaper according to claim 1, wherein the number is 17. 4. An outermost point of an outer edge of the leg flap portion in the crotch region is a ventral region of two regions obtained by bisecting a disposable diaper in a longitudinal direction. Disposable diapers according to any of the above. 5. The disposable diaper according to claim 1, wherein a second absorber having a predetermined width is provided on at least a part of the leg flap portion in the crotch region.