JP4056464B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper that is difficult to slip and conforms to a posture and body shape peculiar to the elderly, has a good wearing feeling, and has excellent anti-moisture properties.

It is generally known that elderly people have a longer sitting time than general adults and have body shape changes such as hip bending. However, conventional disposable diapers do not take into account the changes in posture and body shape that are characteristic of such elderly people, resulting in inconveniences such as the occurrence of slipping, deterioration of wearing feeling, and deterioration of the prevention of leakage. Was.
Japanese Patent Application Laid-Open No. 10-127687 describes a pants-type disposable diaper provided with an elastic elastic member that lifts the back body. However, in the shape where the difference between the dorsal length and the abdominal length is small (the shape where there is no room on the back side when sitting), if the elastic elastic member is lifted on the back body, the slipping of the dorsal end will be induced when sitting. It is easy and not preferable. Moreover, since the bending means is not arrange | positioned over the longitudinal direction at the absorber, the absorber cannot follow the undulation of the heel part, and the adhesion improvement effect of the absorber to the heel part is scarce.

JP-A-10-127687

  As a result of diligent research on the cause of diaper slippage, the present inventors have found that the elongation of the skin in the dorsal crotch region that occurs at the time of sitting generates a slipping force that pulls the dorsal end downward. In addition, it has been found that the displacement drop force can be reduced by moving the portion where the width of the crotch region shows the minimum value in the ventral direction for a predetermined distance. According to the disposable diaper in which the minimum width part of the crotch region is moved in the ventral direction by a predetermined distance as described above, the occurrence of slipping off and the feeling of wearing can be prevented for a wearer who has a body shape change such as when sitting or bending back. Although it was able to improve to some extent the deterioration of the skin and the ability to prevent leakage, the dorsal crotch area was slack for wearers with small body changes such as standing or hip bending, and wearing when standing A new inconvenience occurred that the feeling decreased.

  The sagging of the dorsal crotch region decreases the adhesion between the absorbent body and the skin, and causes not only the wearing feeling but also the leakage prevention effect. In particular, in the case of elderly people, the cheeks of the buttocks are garbled, so that the undulation of the buttocks shape is large, and the adhesion of the absorbent body in the dorsal crotch region is likely to decrease. There has been a demand for improving the adhesion of the absorbent body to the dorsal crotch region of the elderly, but satisfactory improvements have not yet been made.

  Accordingly, an object of the present invention is to provide a disposable diaper which is difficult to slip and conforms to the posture and body shape peculiar to the elderly, has a good wearing feeling, and has excellent anti-moisture properties.

  The present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the two sheets, and is provided with a ventral region, a dorsal region, and a position therebetween. In the disposable diaper having a crotch region, the length Lb from the longitudinal end of the back region to the portion where the width of the crotch region shows the minimum value, and the width of the crotch region from the longitudinal end of the ventral region to the minimum The ratio (Lb / La) with the length La to the part showing the value is 1.4 to 2.0, and both end portions are located in the dorsal region and the central portion is located in the crotch region. A hip elastic member is disposed, and the hip elastic member has a portion that overlaps both side portions in the longitudinal direction of the absorber, and the absorber has the crotch region as a back crotch region and a ventral crotch region. In the longitudinal direction of the absorbent body in the dorsal crotch region when divided into Is obtained by achieving the above object by providing a disposable diaper disposable diaper, characterized in that it comprises a building bending means.

  The disposable diaper of this invention is excellent in a feeling of mounting | wearing, and is a thing which is hard to slip | omit.

Hereinafter, the present invention will be described based on preferred embodiments thereof.
The disposable diaper according to the first embodiment is a pants-type diaper for adults, and as shown in FIGS. 1 to 3, a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent body. 4 and has a ventral region A disposed on the abdomen side of the wearer at the time of wearing, a dorsal region B disposed on the dorsal side, and a ventral region C positioned therebetween, Both side edge portions A1, A1 and both side edge portions B1, B1 of the back region B are joined by known joining means such as heat seal, high frequency seal, ultrasonic seal, etc., and the waist opening 5 and a pair of leg openings 6,6 are formed. The crotch region C is a virtual line in the diaper width direction that bisects the length of the crotch region C in the same direction as the diaper longitudinal direction (in the diaper 1 of the present embodiment, the diaper width that bisects the diaper longitudinal direction). The same as the center line in the direction) is divided into an abdominal crotch area CA which is an area closer to the abdominal area A and a back crotch area CB which is an area closer to the back area B.

  As shown in FIGS. 2 and 3, the disposable diaper 1 is located on the side of the absorbent main body 10 and the outer surface (surface facing away from the wearer) of the absorbent main body 10. And an exterior body 20 to which 10 is fixed. The absorptive main body 10 has a vertically long rectangular shape, and includes a top sheet 2, a back sheet 3, and an absorbent body 4 sandwiched and fixed between these two sheets. The absorbent main body 10 has its longitudinal direction aligned with the diaper longitudinal direction in the unfolded state (the state shown in FIG. 2), and is joined to the central portion of the exterior body 20 by a known joining means. As shown in FIG. 3, the absorbent main body 10 is formed with a pair of solid guards 7.

The absorbent body 4 in the diaper 1 of the first embodiment is provided with a central missing part 80 as bending means extending in the longitudinal direction of the absorbent body 4 (the same as the longitudinal direction of the diaper, the vertical direction in FIG. 2). . The central missing portion 80 in the present embodiment extends between the longitudinal front and rear ends of the absorber 4 and is formed across the back crotch region CB and the ventral crotch region CA. When the bending means is provided in the back crotch region CB, a part of the bending means extending in the longitudinal direction of the absorbent body may be present in the back crotch region CB.
Then, due to the central missing portion 80 provided in the absorbent body 4 and the contraction action of the hip elastic member described later, in the diaper mounted state, as shown in FIG. In the side crotch region CB, the bending absorber 90 is bent at the center in the width direction of the absorber, and the bent absorber portions 90 located on both sides of the center missing portion 80 are raised as they go outward in the width direction.

  The bending means is preferably a low-rigid region formed in the absorbent body 4 from the viewpoints of ease of bending and ease of processing. The low rigidity region means a region having lower rigidity than other regions. The region forming such a low-rigidity region is not particularly limited as long as it is disposed at least in the back side crotch region, but in the back side crotch region, the inner side in the width direction of the absorbent body than the side edge of the absorber body It is preferable that they are arranged so as to be spaced apart to the side and extend in the longitudinal direction.

  A method for forming such a low-rigidity region is not particularly limited as long as the rigidity of a part of the absorber body can be made lower than the rigidity of other parts. For example, a method of hollowing out a part of the absorbent body into a predetermined shape (a method of forming a missing part), a method of setting a part of the absorbent body to have a lower basis weight than other parts, and a part of the absorbent body to other parts And a method of forming a part of the absorber with a material more flexible than other parts, a method of combining one or more of these, and the like. Among these, a method of hollowing out a part of the absorbent body into a predetermined shape and a method of setting a part of the absorbent body to a lower basis weight than other parts are preferable.

  As shown in FIG. 2, the exterior body 20 in the first embodiment has a pair of recesses 60 and 60 for forming leg openings on both sides of a central region in the diaper longitudinal direction. Waist elastic members 51 are disposed at both ends in the longitudinal direction of the outer package 20.

The diaper 1 of this embodiment has elastic elasticity in the circumferential direction of the waist area and the waist area.
In the adult diaper, as shown in FIGS. 1 and 2, the waistline region D is a region from the opening peripheral edge 50 of the waist opening 5 to 50 mm downward, and the waistline region E is the waistline region. This is an area located below the area D and above the position of the upper end portion 65 of the leg opening 6.
The waist area D in the diaper 1 of the present embodiment is substantially elastic in the circumferential direction over the entire circumference by the outer layer sheet constituting the exterior body 20 and the waist elastic member 51 fixed to the sheet. The waistline region E is expressed by the outer layer sheet constituting the exterior body 20 and the waistline elastic member 71 fixed to the sheet, and at least portions located on both sides of the ventral side A and the backside B are circumferential directions. It expresses the elastic stretchability.

  From the longitudinal end 50B of the dorsal region B in the diaper 1 of the present embodiment to the portion Lb where the width W of the crotch region C shows the minimum value W1, and from the longitudinal end 50A of the ventral region A, The ratio (Lb / La) with the length La up to the part where the width W of the crotch region C shows the minimum value W1 is 1.4 to 2.0.

When the ratio (Lb / La) is 1.4 or less, a back-side deviation is likely to occur when sitting, and a large back-side deviation is likely to occur particularly in an elderly person with a bent waist. When worn, it is difficult to pull up to a predetermined position on the back side, and it is difficult to put a foot. Further, when the hip elastic member is disposed, the displacement is further promoted, so that the disposition is difficult. On the other hand, if the ratio (Lb / La) is 2.0 or more, it becomes an excessive shape exceeding the correspondence of sitting posture, hip bending, etc., the back side bump is large, and the feeling of wearing is lowered.
The ratio (Lb / La) is more preferably 1.6 to 2.0 from the viewpoint of further improving the feeling of wearing while preventing the occurrence of slippage and the occurrence of discomfort due to difficulty in putting in the foot. .

  According to the diaper 1 of the present embodiment, the ratio (Lb / La) is in the specific range, and the absorbent main body 10 is a bending portion and the central missing portion 80 missing in the longitudinal direction of the absorbent body 4. When worn, the absorbent body in the back crotch region is divided at the center in the width direction, and the divided absorbent body is bent at the center in the width direction of the back crotch region, When the bending absorber part 90 located becomes a state which goes up as it goes to the outward of the width direction, an absorber can be located along the undulation of a collar part. And since the hip elastic member 63 press-contacts the said bending | flexion absorber part 90 located along the undulation of a buttock to skin, the adhesiveness of skin and an absorber improves, and a leak-proof effect improves. Further, by bending the absorbent body in the width direction, the apparent width is reduced while securing the substantial absorbent performance, and the leg can be easily passed through the absorbent body. At the same time, there is a conflicting demand to bring the minimum inseam width position to the ventral side to improve wearability and make it difficult for the back side to slip off even when sitting, and to ensure leak-proof performance by attaching the absorbent body to the buttocks Can be achieved.

  In the diaper 1 of the present embodiment, as shown in FIG. 2, the first leg elastic member 61 and the second leg elastic member 62 are arranged in a stretched state on the pair of leg parts, respectively, and are arranged around the wearer's waist. A waistline elastic member 71 is disposed in a stretched state around the waistline, and the first leg elastic member 61, the second leg elastic member 62, the waistline elastic member 71, and an area where no absorber is disposed. Except for this, they are separated from each other at the center in the width direction.

In the diaper 1 of this embodiment, the hip elastic member 63 is curved and arranged so that both ends are located in the back region B and the center is located in the crotch region C.
Further, the hip elastic member 63 has a portion that overlaps both side portions in the longitudinal direction of the absorbent body 4 at the center portion located in the crotch region C.
Further, the hip elastic member 63 in the present embodiment is divided into right and left at the center in the width direction of the absorbent body 4. And the area | region P in which the hip elastic member does not exist has arisen in the width direction center part of the absorber 4, The said center missing part 80 is provided in this area | region P. FIG. In the divided hip elastic member 63, the end portion 63b on the diaper width direction center side overlaps with both side portions of the absorbent body 4, and the diaper width direction outer end portion 63a is on the left and right side edges of the back region B. positioned.

  By arranging the hip elastic member 63 in this way, the hip elastic member does not hinder the bending of the absorbent body, and the bent absorbent body comes into contact with the buttocks easily and accurately to improve the leakage prevention effect. be able to.

In the diaper 1 of the present embodiment, as shown in FIG. 2, the shape of the recessed portion 60 for forming the leg opening 6 is a shape in which the ventral crotch region CA is cut larger than the dorsal crotch region CB. A portion [see FIG. 2A] in which the width W of the crotch region C shows the minimum value W1 exists in the ventral crotch region CA.
A separation distance L1 between a portion where the width W of the crotch region C shows the minimum value W1 (see FIG. 2A) and a diaper width direction center line CL that bisects the overall length in the diaper longitudinal direction (see FIG. 2B). ] Is 35 to 140 mm, and more preferably 50 to 80 mm.

As a result of earnest research on the cause of the diaper slippage, the present inventors have found that the wearer's body in the front body (the diaper width direction center line CL that divides the overall length of the diaper into two equal parts). Knowing that the part placed around the thigh generates a downward slipping force due to the movement of the legs during walking, and further moves the part where the pair of leg openings are closest to the ventral direction It was found that the slipping off force can be reduced.
In addition, since the stretch of the skin on the back body of the seat promotes the back side slippage, the back body is designed long in advance to effectively prevent back side slippage.
By having such a configuration, the diaper 1 of the present embodiment can simultaneously achieve the conflicting demands of giving a comfortable wearing feeling in both the standing position and the sitting position and causing no slipping off.

  The distance L1 is preferably 35 to 140 mm, more preferably 50 to 80 mm, from the viewpoint of further improving the wearing feeling while preventing slippage.

  The dimensions of each part described in the present specification are measured in the unfolded and extended state of the diaper. Here, the expanded and extended state means that the side seal portion is peeled off, the diaper is set in the expanded state, the elastic member of each part is expanded in the expanded diaper, and the design dimensions (the influence of the elastic member is eliminated at all). In this state, it is expanded until it becomes the same size as when expanded in a flat shape. When the width of the crotch region C is the same over a predetermined range in the longitudinal direction of the diaper and the width is the minimum value W1, the central portion in the longitudinal direction of the predetermined range is set to the minimum width of the crotch region C. It is assumed that the portion indicates the value W1.

  The diaper 1 of the present embodiment improves the feeling of wearing more reliably, and more reliably prevents inconveniences such as a decrease in absorption performance and incompatibility with the preference of the elderly, in the planar state, both leg openings. The minimum value of the width W1 between the parts 5 and 5 is preferably 100 to 200 mm, particularly preferably 120 to 180 mm.

  As shown in FIG. 3, the outer package 20 is laminated and adhered to an outer layer sheet 21 that forms an outer surface of the diaper (a surface facing away from the wearer), and adjacent to the outer layer sheet 21. Further, various elastic members 51, 61, 62, 63, 71 described later are fixed between these sheets using an adhesive such as a hot-melt adhesive.

  In the disposable diaper 1, a waist elastic member 51 for forming waist gathers is disposed along the circumferential direction at the circumferential edge of the waist opening, and the circumferential direction of each pair of leg openings is also defined in the circumferential direction. Leg elastic members 61 and 62 are disposed along the line. Further, a plurality of waistline gathers are formed along the waistline direction also in the waistline region E, which is a range from a position spaced 50 mm in the crotch direction from the waist opening edge 50 to the position of the upper edge 65 of the leg opening 6. A waistline elastic member 71 is provided.

  The gathers formed by the elastic members 61 and 62 provide elastic stretchability between the leg openings of the abdominal crotch region CA and the dorsal crotch region CB, and the waistline elastic member 71 and the waist elastic member Since the presence / absence of 51 affects the dimension between the leg parts, the dimensions of each part in the planar state are measured in a state where the influence of the contraction force of these elastic members 51, 61, 62, 63, 71 is excluded. To do. Specifically, the elastic members 51, 61, 62, 63, 71 are the same as when each elastic member is removed or cut so as not to develop a contractile force, or when each elastic member does not exist. Measured in a state of being expanded and fixed (tensile state).

  In the diaper of this embodiment, the elastic members 61, 62, 63, 71 are divided and arranged on the left and right, and any of the elastic members 61, 62, 63, 71 is at least in the center in the width direction of the absorber 4. Does not exhibit elastic stretchability. In the diaper of the present invention, it is preferable that an elastic member is not disposed at the center in the width direction of the absorbent body 4 over the entire length in the longitudinal direction of the absorbent body 4. A central missing portion 80 that is missing in the longitudinal direction of the absorbent body 4 is formed as a bending means, and comprises a bent absorbent body portion 90 that bends the absorbent body in the heel portion in the width direction when worn.

  In the diaper according to the present invention, the width of the absorber tends to be narrower than that of the conventional one. The position may deviate from the position of the excretory part of the wearer, which may cause leakage. By not providing an elastic member at the center of the absorbent body 4 in the width direction, it is possible to keep the width of the absorbent body wide and prevent such inconvenience.

  The formation material of each part in the disposable diaper of each embodiment mentioned above is demonstrated. As materials for forming the top sheet 2, the back sheet, the absorber 3, the three-dimensional guard 7, the outer layer sheet 21, the inner layer sheet 22, and the like, various materials used in conventional disposable diapers and the like can be used. As a material for forming the elastic members 51, 61, 62, 63, 71, various known elastic materials used for disposable diapers and the like can be used. Examples of the material include styrene-butadiene, butadiene, isoprene, neoprene, and the like. Elastic materials such as synthetic rubber, natural rubber, EVA, elastic polyolefin, urethane, etc. can be widely used. For example, the shape is rectangular, square, circular, polygonal, multifilament type thread-like Etc. are used.

  Next, the disposable diaper 1A-1D as 2nd-5th embodiment of this invention is demonstrated. In these disposable diapers, the same reference numerals are assigned to the same components as those of the disposable diaper 1 described above except for the formation of the bending means, and the description thereof is omitted. About the point which is not demonstrated especially, the description about the disposable diaper 1 mentioned above is applied suitably.

  As shown in FIG. 4, the bending means in the diaper 1 </ b> A of the second embodiment includes a central missing portion 80 that is missing in the longitudinal direction of the absorbent body 4, and the absorbent body in the crotch portion bends in the width direction when worn. It consists of a bending absorber portion 90.

  As shown in FIG. 5, the bending means in the diaper 1 </ b> B of the third embodiment has a central missing portion 80 missing in the longitudinal direction of the absorbent body 4 formed intermittently in the longitudinal direction.

  Furthermore, as shown in FIG. 6, the bending means in the diaper 1 </ b> C of the fourth embodiment includes a plurality of central missing portions 80 that are missing in the longitudinal direction of the absorbent body 4 in the width direction.

  As shown in FIG. 7, the bending means in the diaper 1 </ b> D of the fifth embodiment is such that the width of the central missing portion 80 missing in the longitudinal direction of the absorbent body 4 is the back end portion in the back crotch region of the central missing portion 80. It spreads toward the center line in the width direction.

In the case where a plurality of hip elastic members are arranged, it is preferable that the distance between adjacent hip elastic members is larger on the center side in the diaper width direction than on the outer side in the diaper width direction on both sides in the diaper longitudinal direction. When three or more hip elastic members are arranged on both sides in the longitudinal direction of the diaper, it is preferable that at least one pair of adjacent hip elastic members is larger on the center side than the outer side in the diaper width direction. It is preferable that the width between the hip elastic members is made as such. For example, in the diaper of the first embodiment, the distance between the hip elastic members 63 and 63 at the end portion 63b of the hip elastic member is such that each of the hip elastic members 63 and 63 at the end portion 63a on the outer side in the diaper width direction. Although larger than the interval, such a configuration is preferred.

  When the interval between the adjacent hip elastic members is larger on the center side than the outer side in the diaper width direction, a plurality of contracting forces having different directions are formed in the longitudinal direction in the vicinity of the end 63b on the center side in the diaper width direction. By being formed over a wide range, it is possible to follow various hip shapes having great individual differences. On the other hand, in the vicinity of the end portion 63a on the outer side in the diaper width direction, a plurality of elastic members are arranged close to each other, thereby increasing the contraction force per unit area and effectively preventing the slippage.

3-15 mm is preferable and, as for each space | interval of the hip elastic members 63 and 63 in the edge part 63a outside a diaper width direction, 5-10 mm is more preferable.
10-30 mm is preferable and, as for each space | interval of the hip elastic members 63 and 63 in the edge part 63b of the diaper width direction center side, 15-25 mm is more preferable.
(Distance between the hip elastic members 63 and 63 at the end 63b on the center side in the diaper width direction) / (Distance between the hip elastic members 63 and 63 at the end 63a on the outer side in the diaper width direction) = 2.0 to 5 0.0 is preferable, and 2.5 to 4.0 is more preferable.
The distance between the hip elastic members 63 and 63 is from the end 63a on the outer side in the diaper width direction of the hip elastic members 63 and 63 and the end 63b on the central side in the diaper width direction toward the adjacent hip elastic members 63 and 63. This is the length of the vertical line extended. The intervals between the hip elastic members 63 and 63 may be the same.

As mentioned above, although preferable embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above.
The disposable diaper of the present invention is suitable for adults, particularly for elderly people, but can also be applied for infants. In the case of a diaper for infants, the waistline region D is a region from the opening peripheral edge of the waist opening to 30 mm below, and the waistline region E is located below the waistline region D and is a leg opening. 6 is an area located above the position of the upper end portion 65 of FIG.

<Example 1>
A diaper having a configuration similar to that of the diaper of the first embodiment was manufactured by using a nonwoven fabric as the outer layer and the inner layer sheet for forming the outer package. The ratio Lb / La was measured and shown in Table 1 for each of the manufactured diapers.
The ratio Lb / La was measured for each diaper of the example and is shown in Table 1.

<Comparative Examples 1-5>
The ratio Lb / La was measured for commercially available disposable diapers and is shown in Table 1.

<Performance evaluation>
About the disposable diaper of an Example and a comparative example, the feeling of mounting | wearing and slipping-off prevention property were evaluated by the following method, respectively. The results are shown in Table 1.
1) Wearing feeling of hip part 20 elderly people wore each diaper of an Example and a comparative example for 2 days, and had the wearing feeling evaluated on the following references | standards. Table 1 shows the number of respondents who answered that “the hips are comfortable and comfortable” for each of the standing and sitting positions.
(Evaluation criteria)
○: The hips are comfortable without any discomfort △;

2) Preventing back slippage 20 elderly people were allowed to wear the diapers of Examples and Comparative Examples for 2 days, and the wearing feeling was evaluated according to the following criteria. Table 1 shows the number of respondents who answered that there was no gap.
(Evaluation criteria)
○: There was no gap drop ×: There was a gap drop

  From the evaluation results shown in Table 1, it can be seen that the diapers of the examples are excellent in both wearing feeling and slippage prevention. On the other hand, when Lb / La is not within the scope of the present invention, when there is no hip elastic member, or when there is no bending means, it is found that the feeling of wearing and slip-off prevention are inferior. That is, it can be seen that the present invention is effective in order to achieve both excellent wearing feeling and slip-off prevention.

Drawing 1 is a perspective view showing the back body side of the disposable diaper as one embodiment of the present invention. 2 is a plan view showing a deployed and extended state of the disposable diaper of FIG. 1, FIG. 2 (a) is a state in which the absorbent main body is fixed on the exterior body, and FIG. 2 (b) is an absorption state. It is a figure which shows the state which removed the sex main body. 3 is a cross-sectional view in the width direction of the disposable diaper shown in FIG. 2, FIG. 3 (a) is an XX cross section of FIG. 2, FIG. 3 (b) is a YY cross section of FIG. (c) is a figure which shows typically each XX cross section of FIG. 2 in a diaper wearing state. FIG. 4 is a diagram (corresponding to FIG. 3A) showing an embodiment in which the bending means of the absorber is a missing portion surrounded by the absorber. FIG. 5 is a view (an equivalent view of FIG. 3A) showing an embodiment in which a plurality of means for bending the absorber are arranged in the longitudinal direction. FIG. 6 is a diagram (corresponding to FIG. 3A) showing an embodiment in which a plurality of absorber bending means are arranged in the width direction. FIG. 7 is a view showing an embodiment in which the bending means of the absorbent body is a missing part that is missing in the longitudinal direction of the central part of the absorbent body, and the width of the missing part increases toward the central part of the diaper [FIG. a) equivalent figure].

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A-1D Disposable diaper 2 Top sheet 4 Absorber 5 Waist opening part 6 Leg opening part 6A Opening edge part located in the ventral part of leg opening part 6B Opening edge part located in the back side part of leg opening part 10 Absorbent body 12 Lower end of diaper 20 Exterior body A Abdominal region B Dorsal region C Inseam region 51 Waist elastic member 61 First leg elastic member 62 Second leg elastic member 63 Hip elastic member 71 Girth elastic member 80 Center missing Part (bending means)
90 Bending absorber

Claims (6)

A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the two sheets, and a ventral region, a back region, and a crotch region positioned therebetween In disposable diapers that have
A length Lb from the longitudinal end of the dorsal region to the portion where the width of the crotch region shows the minimum value, and a length La from the longitudinal end of the ventral region to the portion where the width of the crotch region shows the minimum value And the ratio (Lb / La) is 1.4 to 2.0,
A hip elastic member is disposed so that both end portions are located in the back side region and a central portion is located in the crotch region, and the hip elastic member has a portion overlapping with both side portions in the longitudinal direction of the absorber. Have
The absorbent body has at least a bending means extending in the longitudinal direction of the absorbent body in a back side crotch region when the crotch region is divided into a back side crotch region and a ventral side crotch region,
The leg elastic members are arranged in an extended state on the pair of leg portions arranged around the legs of the wearer, and the waist elastic members are arranged in an extended state on the waist around the waist of the wearer, The leg elastic member and / or the waist elastic member is divided into right and left at the center in the width direction of the absorber ,
The hip elastic member is divided into right and left at the center in the width direction of the absorbent body, and the absorbent body has the bending means in a region between the elastic members spaced apart from each other. The bending means, the disposable diaper of claim 1, wherein the low stiffness region formed in the absorber. The disposable diaper according to claim 1 or 2 , wherein a plurality of the bending means are arranged in a longitudinal direction of the absorber. The disposable diaper according to any one of claims 1 to 3 , wherein a plurality of the bending means are arranged in the width direction of the absorber.   The bending means is a missing portion that is missing in the longitudinal direction of the absorber in the back crotch region, and the missing portion is spaced further inward in the width direction of the absorber than both side edges of the absorber. The width of the missing portion is widened from the back end portion in the back crotch region of the missing portion toward the center line in the width direction. The disposable diaper in any one of -4. A plurality of the hip elastic members are arranged at intervals in the diaper longitudinal direction, and the interval between the adjacent hip elastic members is the center in the diaper width direction from the outside in the diaper width direction on both sides in the diaper longitudinal direction. The disposable diaper in any one of Claims 1-5 made large in the side.

Images