JP4297720B2 - Disposable diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable diaper which is hard to be stuffed and difficult to leak.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, as a deployable disposable diaper, it has a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between both sheets, and is used on the stomach side of the wearer during use. A diaper formed with a ventral portion located on the back and a dorsal side portion located on the back side is widely used, and the dorsal side portion described above can be worn while standing for adults among deployable disposable diapers. West band portions are provided on both left and right side edges of the belt, and band fastening portions are provided at the front end portions of at least one of the left and right waist band portions. The left and right waist band portions are connected by the band fastening portions. There are known ones that can be fixed on the wearer's ventral side.
And as this diaper of a waistband type, what provided the solid guard in order to improve leak prevention performance is also known (refer to patent documents 1 and 2).
[0003]
The disposable diaper having such a waistband portion has an advantage that the wearer can wear it by himself / herself in a standing position, but there is a problem that stuffiness is relatively likely to occur.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-5278 [Patent Document 2]
Japanese Patent Application Laid-Open No. 09-285489
Accordingly, an object of the present invention is to provide a disposable diaper which is less likely to be stuffy and less likely to leak.
[0006]
[Means for Solving the Problems]
The present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, on both side edges of one part in the longitudinal direction, A waistband portion is provided continuously, a band fastening portion is provided at the tip of at least one of the left and right waistband portions, and a diaper fastening portion is provided on both sides of the other portion in the longitudinal direction. The left and right waistband portions are fastened on the stomach side or the back side of the wearer by the band fastening portion, and the other portion is fastened by the diaper fastening portion. Alternatively, it is a deployable disposable diaper that is fastened and worn near its proximal end, and a three-dimensional guard forming sheet having elastic members is arranged on both sides in the longitudinal direction of the diaper. guard Each of the three-dimensional guards is fixed so that it cannot stand up at both ends in the longitudinal direction of the diaper and can stand up between the fixed ends, and the left and right waist band portions are formed in an elongated shape. The width of each waistband part is smaller than the length from the waist edge end in one longitudinal part of the waistband part on the left and right to the longitudinal end part of the leg part side edge, The object is achieved by providing a disposable diaper in which the fixing portion of the sheet material for forming the waistband portion is located on the outer side in the longitudinal direction from the portion expressing the elastic stretchability of the three-dimensional guard. .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The disposable diaper 1 as an embodiment of the present invention is a waistband type adult diaper that can be worn while standing, and as shown in FIG. 1, a liquid-permeable topsheet 2, a liquid-impermeable material. The back sheet 3 and the liquid-retaining absorbent 4 interposed between the two sheets 2 and 3 are formed substantially vertically long. “Substantially vertically long” means that the portion excluding the waistband portion may be vertically long. The longitudinal direction of the diaper is the same direction as the longitudinal direction of the portion excluding the waistband portion.
[0008]
The absorbent body 4 is sandwiched and fixed by the top sheet 2 and the back sheet 3, and the diaper wearer is fitted with each part on one side of the waist part 5 and the leg part 6 at the peripheral part of the absorbent body 4. A waist elastic member 51 and a leg elastic member 61 are provided.
[0009]
The top sheet 2 has a rectangular shape that is slightly wider than the entire width of the absorber 4, and is disposed on the center in the width direction of the back sheet 3 formed in an hourglass shape. The portion of the back sheet 3 that extends outward from the left and right side edges of the top sheet 2 is covered with a three-dimensional guard forming sheet 72 described later.
The top sheet 2, the back sheet 3, the absorber 4, and the three-dimensional guard forming sheet 72 constitute a diaper main body portion.
[0010]
The disposable diaper 1 has an elongated waistband portion on each of the left and right side edges of one portion in the longitudinal direction (a portion having a waistband portion on the left and right side, hereinafter referred to as a back side portion for convenience) A. 10 and 10 are continuously provided, and a band fastening portion 11 is provided at a tip portion of at least one of the left and right waist band portions 10 and 10. As shown in FIG. 3 and FIG. 4, the left and right waistband portions 10a and 10b can be fastened on the wearer's abdomen or dorsal side. In the present embodiment, the sheet material 10A for forming the waistband portions 10a and 10b is bonded and fixed to the surface sheet 2 side.
[0011]
Further, the other side in the longitudinal direction (hereinafter referred to as the abdominal side for convenience) B on both sides of the topsheet 2 side is, as shown in FIG. Diaper fastening parts 20, 20 for fastening the part B are provided.
[0012]
The band fastening part 11 and the diaper fastening parts 20 and 20 are preferably formed by convex members of a mechanical fastener having a large number of hook-shaped or hook-shaped male engagement members arranged on the surface thereof, As the convex member of the mechanical fastener, for example, “Magic Tape (registered trademark)” (manufactured by Kuraray Co., Ltd.), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu (registered trademark)” (Kanebo Bell Touch Co., Ltd.) (Commercially available) can be used.
Moreover, it is preferable that at least the surface of the left and right waistband portions 10, 10 is made of a sheet material capable of directly engaging the convex member of the mechanical fastener. Examples of such a sheet material include a nonwoven fabric such as a thermal bond nonwoven fabric, a needle punch nonwoven fabric, and a spunlace nonwoven fabric.
[0013]
As shown in FIG. 1, each of the left and right waistband portions 10 is formed in an elongated shape. More specifically, the width of the waistband portion 10 is substantially constant from the base end 13 toward the tip end 14. It has a strip shape. The elongated shape has a width in a direction perpendicular to the longitudinal direction of the waistband portion 10 in the vicinity of the proximal end 13 and the vicinity of the distal end 14 (particularly the portion where the center point of the band fastening portion 11 is located and its symmetrical portion). The difference is preferably within 20%, particularly within 10%. As shown in FIG. 1, the left and right waistband portions 10, 10 are made of a sheet material 10 </ b> A for forming the waistband portion such that the longitudinal direction thereof is directed to the width direction rather than the longitudinal direction of the diaper. It is formed fixed on the top sheet 2 side.
[0014]
And the width W (refer FIG. 1) of each waistband 10 is the width | variety of the concave side edge of the leg part 6 from the waist edge end 8 in the back side part (one part of the said longitudinal direction which has a waistband part on either side). It is smaller than the length L1 (see FIG. 1) to the end 62 in the longitudinal direction. With such a configuration, the wearer's skin is not unnecessarily covered, so that stuffiness and fogging can be prevented. In addition, the degree of freedom of movement of the waistband portion during wearing is increased, and the wearing operation by the wearer (caregiver) is easy. From such a viewpoint, the width W of the waistband is preferably 30 to 80%, particularly 30 to 60%, more preferably 30 to 50% with respect to the length L1.
[0015]
When the width of the waistband 10 is not constant over the longitudinal direction, for example, when the width gradually decreases from the proximal end 13 toward the distal end 14, the waistband portion 10 is moved from the proximal end 13 side to the distal end 14. The width W (see FIG. 1) at a portion where the waistband portion does not overlap with the diaper main body portion for the first time when viewed toward the side is defined as the width of the waistband here.
[0016]
Each waistband part 10 in the present embodiment has a surface on the skin contact surface side at one end of the substantially strip-shaped sheet material 10A for forming the waistband on the skin contact surface side of the diaper main body part. It is provided by joining with a mold adhesive. The surface on the skin contact surface side is the surface of the sheet material for forming the waistband that is directed toward the wearer's skin when wearing a diaper. A boundary line 13 ′ between a fixing portion (shaded portion in FIG. 2) where the sheet material for forming the waistband portion is joined to the diaper main body portion and a non-fixing portion not joined to the diaper main body portion is formed. The base end 13 of the waistband part. The base end 13 or the boundary line 13 ′ is inclined with respect to the diaper longitudinal direction, and the waistband portion 10 is folded along the boundary line 13 ′ so as to overlap the diaper main body portion (see FIG. 2). The longitudinal direction of the waistband portion 10 is parallel to the longitudinal direction of the diaper.
[0017]
A solid guard forming sheet 72 having an elastic member 71 is disposed on both sides in the longitudinal direction of the disposable diaper 1 to form a solid guard 7. Each solid guard 7 cannot stand up at both ends of the diaper longitudinal direction. The two end portions fixed to each other and fixed to each other can stand upright.
More specifically, the three-dimensional guard forming sheet 72 has an inner edge formed in a straight line as both side edges in the direction along the longitudinal direction of the diaper and an outer side having substantially the same shape as the side edge of the diaper main body. And an edge. A sleeve-like space is formed at the inner edge, and an elastic member 71 for gathering is fixed in an expanded state in the space in the central region in the longitudinal direction.
In the three-dimensional guard forming sheet 72, a predetermined region on the outer edge side is bonded onto the top sheet 2 or the back sheet 3 over the entire length in the diaper longitudinal direction. A region having a predetermined width on the inner edge side of the sheet 72 in the central region in the longitudinal direction is not joined on the top sheet 2 and the back sheet 3. The three-dimensional guard 7 is an area having a predetermined width on the inner edge side of the three-dimensional guard forming sheet 72.
[0018]
In the diaper of the present invention, the fixing (joining) portion of the sheet material 10 </ b> A for forming the waistband portion is located on the outer side in the longitudinal direction from the portion expressing the elastic stretchability of the three-dimensional guard 7. The fixing (joining) part of the sheet material 10A in the form shown in FIG. 1 is a part (the hatched portion in FIG. 2) where the sheet material 10A is joined to the top sheet 2 and / or the sheet 72, and the elasticity for the three-dimensional guard The fixing portion of the sheet material 10A is located outside the portion in which the member 71 is bonded and fixed to the three-dimensional guard sheet in the longitudinal direction of the diaper.
As described above, since the diaper of the present invention has the waistband portion 10 narrowed, it extends from the end portion 62 in the longitudinal direction of the leg portion side edge to the joint portion of the waistband portion 10 to the topsheet 2. However, it can be said that there is a concern that leakage of excrement may occur because the gap may be wider than the conventional diaper. However, in the present invention, conversely, by combining this configuration with the above-described configuration of the portion of the three-dimensional guard 7 that exhibits elastic stretchability, the end portion 62 of the concave side edge of the leg portion is combined. In addition, even if the expansion / contraction part of the three-dimensional guard 7 is arranged upward, the standing property of the three-dimensional guard 7 is not hindered, so that the leakage prevention performance can be enhanced. In addition, the prevention of stuffiness and fogging can be enhanced.
[0019]
In the present embodiment, as shown in FIG. 1, each of the waistband portions 10 and 10 is inclined toward the waist edge 8 side of the back side portion A in the diaper longitudinal direction in the unfolded state. In other words, the waist band portion 10 is inclined toward the waist edge 8 in the diaper longitudinal direction with reference to the non-inclined case where the waist band portion extends in the same direction as the straight line extending in the diaper width direction. Although the case where it inclines to the diaper longitudinal direction center side is considered, the inclination direction in the diaper 1 of this embodiment is the former.
[0020]
An angle θ (see FIG. 1, hereinafter referred to as an inclination angle) between the side edge 12 of each waistband portion 10 on the side of the waist edge 8 and a straight line L extending in the diaper width direction is more than 0 ° and not more than 30 °. In particular, it is preferably 5 to 25 °, more preferably 5 to 15 °. This is because it is easy to fix the left and right waistband portions straight by inclining the waistband portion 10 within the range. By making it straight, the abdomen part with the diaper fastening part can also be fastened to the band straight, so it is difficult to create a gap between the diaper and the wearer's skin, from the waist opening It is possible to effectively prevent excrement leakage.
[0021]
One side edge 12 on the side of the waist edge 8 is one side edge of both side edges along a direction from the base end 13 toward the tip end 14 (hereinafter also referred to as an extending direction). The one side edge 12 of the waistband part 10 of the present embodiment is formed in a straight line, and the length of the waistband part 10 in the extending direction extends from the proximal end 13 to the vicinity of the distal end 14 of the waistband part 10. The inclination angle θ is within the above range over a length of 90% or more of the length L2 (see FIG. 1). By tilting the waistband in this way, it is possible to minimize the influence of the wearer's body shape when fastening the band, so make sure that the band is horizontal and not wrinkled Becomes easy.
[0022]
In order to wear the disposable diaper 1 of the present embodiment, first, as shown in FIG. 3, the back side portion A is brought into contact with the back side of the wearer 30, and both the waistband portions 10 a and 10 b are attached to the wearer 30. Bring to the ventral side. Then, one waistband portion 10a is overlapped with the other waistband portion 10b, and the band fastening portion 11 provided at the tip of the one waistband portion 10a is replaced with the back surface of the other waistband portion 10b. Engage and secure on the seat side. Then, the abdomen B is pulled up to the abdomen along the crotch of the wearer 30, and the diaper fastening parts 20, 20 are engaged with the back sheet sides of the waistband parts 10, 10 as shown in FIG. Arrive.
The disposable diaper 1 according to the present embodiment can be attached by bringing the back side portion A into contact with the abdomen of the wearer 30 and fastening both the waistband portions 10 and 10 on the back side of the wearer 30. .
The disposable diaper of this embodiment can be easily attached in this way.
[0023]
According to the disposable diaper of the present embodiment, the waistband portion 10 has an elongated shape that is narrower than the length of the side edge portion 9 of the back side portion A, and the joining of the sheet material 10A for forming the waistband portion. Since the fixed portion 16 is positioned outward in the diaper longitudinal direction from the portion where the three-dimensional guard 7 exhibits elastic stretchability, the three-dimensional guard 7 is disposed even if the stretchable portion of the three-dimensional guard 7 is disposed longer in the diaper longitudinal direction. It is possible to greatly improve the prevention of stuffiness and fogging while ensuring the necessary leakage prevention performance.
[0024]
In addition, when the waistband portion is formed of a nonwoven fabric or the like that does not have elastic stretchability, sufficient fit around the waist cannot be obtained. For example, the upper edge of the waistband portion and the skin of the wearer There was a gap between them, giving the wearer a sense of incongruity, or the gap could cause leakage, but when a structure that tilts the waistband part 10 is adopted, In particular, a gap is hardly generated between the upper edge portion and the wearer's skin, and sufficient fit around the waist can be obtained. Therefore, a good wearing feeling or fitting feeling can be obtained around the waist, and the occurrence of leakage or the like due to a gap with the wearer's skin can be prevented.
In addition, when an elastic stretch part is provided in the waistband part, the fit around the waist is improved to some extent, but in that case, the elastic stretch part is formed using a sheet material of a specific structure, There is a problem that the process becomes complicated and the degree of freedom in selecting a material for the waistband portion decreases.
In the case where the waistband portion is inclined, the above-described effects can be obtained without forming the elastic stretchable portion in the waistband portion 10, so that the manufacturing process becomes complicated or the material selection of the waistband portion is possible. The problem that the degree of freedom is reduced can also be solved.
[0025]
Preferred embodiments of the present invention will be further described.
In a preferred embodiment of the present invention, the fixing portion (shaded portion in FIG. 2) of the sheet material 10A for forming the waistband portion does not overlap the absorbent body 4 in the diaper thickness direction. Since the waistband portion 10 may be subjected to a strong force in the diaper width direction during the mounting operation and during the mounting operation, even if the bonding of the sheet material 10A is disengaged by such a configuration, damage to the absorbent body is avoided. Leakage of things can be prevented.
[0026]
Moreover, in preferable embodiment of this invention, it has no expansion-contraction elastic part between the left and right waist band parts 10 and 10 (the same position as a band part base end in a diaper longitudinal direction). This is because when the elastic member for forming the elastic stretchable part is arranged in the region located between the two waistband parts, the waistband 10 in the form in which the above-described waistband part 10 is inclined, This is because when the diaper expands or contracts in the width direction between 10 and 10, the inclination angle is different from that at the time of design, and in some cases, the waistband portions may not be able to be fixed straight at the time of wearing.
[0027]
Furthermore, in a preferred embodiment of the present invention, the fixing portion of the waistband portions 10 and 10 [the fixing portion of the sheet material 10A for forming the waistband portion (shaded portion in FIG. 2)] is the fixing of the standing portion of the three-dimensional guard 7 It is arranged outward in the diaper width direction from the end position. Here, the position of the standing portion fixing end is the position of the fixed end of the three-dimensional guard at the portion where the three-dimensional guard can stand and the extended line extending the fixed end in parallel with the diaper longitudinal direction. Thereby, the standing property of the three-dimensional guard can be further ensured, and the prevention of excrement leakage can be further enhanced.
[0028]
In addition, in a preferred embodiment of the present invention, leg elastic members 61 and 61 are disposed on the outer side in the diaper width direction with respect to the three-dimensional guards on both sides of the diaper in the diaper longitudinal direction. The fixed portion (shaded portion in FIG. 2) is located on the outer side in the longitudinal direction from the portion of the leg elastic member that exhibits the elastic stretchability. Since this configuration prevents the waistband portions 10 and 10 from warping to the inside of the diaper, the wearing operation is facilitated.
[0029]
In the above description, as a preferred embodiment, the waist band portion is mainly non-stretchable, but the diaper of the present invention is also a preferred embodiment in which the waist band portion elastically stretches in the longitudinal direction. .
When the waistband portion 10 is elastically stretched in the longitudinal direction, it is easy to wear because it stretches in the diaper width direction when worn. (2) Stretches in the longitudinal direction of the diaper while wearing Therefore, the effect that a gap is very unlikely to be generated between the wearer and the wearer is further obtained without giving the wearer a feeling of tightness (pressure). (3) Further, by the action (2), the stress applied to the fastening portion is relieved and the fastening of the band is difficult to be removed, so that the fastening portion can be designed to be small. As a result, the entire band can be designed to be thin, and the effect of reducing skin troubles due to dirt, absorption inhibition, compression, rubbing, swelling, etc. due to excrement in the band part can be further obtained. In this case, the maximum elongation rate of 1.3 times or less with respect to the natural length of the waistband portion enhances the effects (2) and (3) described above without reducing the effect (1). This is preferable. Here, the maximum elongation rate refers to the elongation rate at the time when the waistband portion 5 is pulled from its natural length and is stretched until breakage occurs.
[0030]
As a specific form in which the elastic band part is provided in the waist band part, at least the base part of the waist band part 10 (the vicinity of the base end 13) has an elastic part that expands and contracts in the longitudinal direction of the waist band part. A preferred example is a form in which the entire waistband portion 10 is made of an elastic sheet that elastically expands and contracts in the longitudinal direction.
[0031]
As another method of forming the elastic stretchable part at the base end part of the waistband part 10, an elastic member (thread rubber, flat rubber, etc.) is arranged in a direction from the base end 13 toward the tip including the base end 13. And a method in which the base end portion of the waistband 10 is made of an elastic sheet that elastically expands and contracts elastically.
[0032]
As an elastic stretch sheet in the case where the whole or a part of the waist band portion 10 is made of an elastic stretch sheet, for example, a direction corresponding to the longitudinal direction of the waist band portion on one side or both sides of a sheet made of an elastomer material It is possible to use a laminated sheet obtained by laminating and integrating fiber assemblies that can be stretched. As the elastomer material, natural rubber, synthetic rubber such as butadiene, isoprene, or the like is preferably used. As the sheet made of the elastomer material, an elastic film obtained by forming the elastomer material into a film, an elastic fiber made of the elastomer material, A sheet formed into a shape or made into a non-woven fabric is preferably used. As the fiber assembly, a non-woven fabric having extensibility itself, for example, a non-woven fabric made of spandex, or the like that does not have extensibility even without secondary processing such as formation of slits. What gave the extensibility by secondary processes, such as formation, can be used.
[0033]
In the present invention, it is preferable that a waist elastic member 51 is provided between the right and left diaper fastening portions 20 and 20. Here, “between the fastening parts” is spaced apart in the width direction, and both the fastening parts and the waist elastic member 51 are in the same position in the longitudinal direction, or the waist elastic member 51 exists above. Including cases. As a result, a gap between the wearer's skin and the diaper is less likely to occur. In particular, when the waistband portion has a maximum elongation rate of 1.3 times or less, it is more preferable to dispose the waist elastic member so as to have the same maximum elongation rate, since the adhesion is increased.
[0034]
The unfoldable disposable diaper of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the description has been made on the assumption that the side flap width is not provided so much in the region below the waistband 10 in the upper part of the diaper longitudinal direction than the end 61 in the longitudinal direction of the side edge of the leg part. However, the flap portion may be formed slightly wider by a member different from the waistband 10. In this case, it is preferable to comprise only a breathable and moisture-permeable nonwoven fabric.
[0035]
Moreover, the waist part elastic elastic member 51, the leg elastic elastic member 61, and the solid guard 7 in the said embodiment can each be abbreviate | omitted.
In addition, a thread-like or belt-like elastic member (thread rubber, flat rubber, etc.) is provided in an expanded state along the one side edge 12 in the vicinity of the one side edge 12 of the waistband portion 10, and the contraction force of the elastic member Thus, the waist band can be inclined. In this embodiment, the one side edge 12 side of the waistband portion 10 contracts, and the apparent length of the side edge 12 on the waist edge end side becomes shorter than the apparent length of the side edge 15 on the opposite side, The effect similar to the diaper of embodiment mentioned above is show | played.
In the present invention, a good fit can be obtained without providing the waistband part 10 with an elastically expanding / contracting part. However, an elastically expanding / contracting part is provided to further improve the fitting property. You can also
[0036]
The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.
[0037]
【The invention's effect】
The disposable diaper of the present invention is difficult to sag and difficult to leak.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which an embodiment of a disposable diaper of the present invention is expanded in a planar shape.
FIG. 2 is a plan view showing a state in which the waistband portion of the disposable diaper of FIG. 1 is folded.
FIG. 3 is a view showing a state in the middle of wearing the disposable diaper of FIG. 1;
4 is a view showing a state in which the disposable diaper of FIG. 1 is mounted. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Waist part 6 Leg part 7 Solid guard 8 Waist edge 10 Waist band part 11 Band fastening part 12 One side edge 16 of the waist edge side Waist band part formation sheet Material fixing part 20 Diaper fastening part

Claims (6)

It comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between these two sheets, and waistband portions are provided on both side edges of one part in the longitudinal direction. A band fastening part is provided at the tip of at least one of the left and right waist band parts, and a diaper fastening part is provided on both sides of the other part in the longitudinal direction. The left and right waist band portions are fastened on the stomach side or the back side of the wearer by the band fastening portions, and the other portion of the waist band portions or their bases are fastened by the diaper fastening portion. An unfolded disposable diaper that is designed to be worn near the end,
A solid guard forming sheet having an elastic member is arranged on both sides of the diaper longitudinal direction to form a solid guard, and each solid guard is fixed and fixed so as not to stand up at both ends of the diaper longitudinal direction. It is possible to stand between both ends,
The left and right waistband portions are formed in an elongated shape, and the width of each waistband portion is from the waist edge end in one of the longitudinal directions having the waistband portions on the left and right sides of the leg portions. Smaller than the length to the end in the longitudinal direction, the fixing part of the sheet material for forming the waistband portion is located on the outer side in the longitudinal direction from the portion expressing the elastic stretchability of the three-dimensional guard ,
In the vicinity of one side edge of each of the left and right waist band portions, a thread-like or band-like elastic member is disposed in an extended state along each one side edge. The disposable diaper in which the waistband portion is inclined toward the waist edge end side of the one portion in the diaper longitudinal direction in each deployed state . The disposable diaper according to claim 1 , wherein a longitudinal direction of the waist band part in a state where the left and right waist band parts are folded so as to overlap with a diaper main body part is parallel to a longitudinal direction of the diaper. The left and right waistband portions have elastic stretchability in their respective longitudinal directions, a waist elastic member is provided between the diaper fastening portions, and the waistband portion is 1.3 times or less maximum. The disposable diaper according to claim 1 or 2, wherein the waist elastic member is disposed so as to have an equivalent maximum elongation rate when having an elongation rate. The disposable diaper according to any one of claims 1 to 3 , wherein an elastic member for forming an elastic stretchable part is not disposed between the left and right waistband parts.   The disposable diaper in any one of Claims 1-4 in which the fixing | fixed part of the sheet | seat material for said waist band part formation is located in the diaper width direction outer side rather than the position of the standing part fixed end of the said three-dimensional guard.   Leg elastic members are arranged outward in the diaper width direction from the three-dimensional guards on both sides of the diaper in the longitudinal direction, and the fixing portion of the sheet material for forming the waistband portion expresses elastic elasticity of the leg elastic members The disposable diaper in any one of Claims 1-5 located in a longitudinal direction outward rather than the part to do.

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