JP2010125132A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper, hardly causing a gap between the disposable diaper and a wearer, and improving fitting capability. <P>SOLUTION: This disposable diaper 1 includes a pair of side flap parts 6 extending outward in the width direction (X-direction) from both side parts 51 of a back part B in its body 5 and respectively provided with fastening tapes 8. The side flap parts 6 of the disposable diaper 1 are formed like a truncated chevron shape. In the side flap parts 6, the side edges 61 in the extending direction are formed with a gradient to the center line CL of the body 5. The fastening tapes 8 of the disposable diaper 1 are formed extending from the side edges 61 of the side flaps 6 substantially orthogonally to the side edges 61. A stretch member 9 extending in the width direction is disposed between the pair of fastening tapes 8 of the disposable diaper 1, and the elastic force of a part 9a rather closer to the back side of the stretch member 9 is made larger than that in a part 9b rather closer to the crotch part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a deployable disposable diaper provided with a fastening tape.

  Conventionally, a disposable diaper provided with a fastening tape on each of both sides of the back side of the main body is known. In order to improve the fit between the disposable diaper and the wearer when worn, for example, Patent Document 1 has an elastic member inclined with respect to a straight line extending in the width direction of the main body of the disposable diaper. A disposable diaper having a fastening tape arranged in line with a member is described. Further, Patent Document 2 includes a fastening tape on each of a pair of side flap portions extending outward in the width direction from both side portions of the back side portion of the main body, and the side edges in the extending direction of the side flap portions are inclined. And the disposable diaper which has a fastening tape extended in a substantially perpendicular direction with respect to the side edge of a side flap part is described.

  However, in the disposable diaper described in Patent Document 1, since the elastic member is provided to be inclined, a gap may be generated between the disposable diaper and the wearer, and the fit may be inferior.

  Moreover, in the disposable diaper described in Patent Document 2, there is a case where a gap is generated between the disposable diaper and the wearer because the elastic member extending in the width direction is not disposed between the pair of fastening tapes. In some cases, the fit was inferior.

JP 2006-246999 A JP-A-8-266572

  Accordingly, an object of the present invention is to provide a disposable diaper in which a gap is hardly generated between the disposable diaper and the wearer, and the fitting property is improved.

  The present invention extends outward in the width direction from both sides of the dorsal side of a main body having a ventral part, a dorsal part, and a crotch part positioned between the ventral part and the dorsal part. Each of the pair of side flap portions is a deployable disposable diaper provided with a fastening tape, and the pair of side flap portions are formed in an eight-letter shape, and each of the pair of side flap portions is an extension thereof. Each side edge in the outgoing direction is formed to be inclined with respect to a center line extending in the longitudinal direction of the main body, and the inclination direction of the side edge is a direction toward the center of the edge of the back side part, The pair of fastening tapes are formed so as to extend in a substantially vertical direction from the side edges of the pair of side flap portions with respect to the side edges, and in the width direction between the pair of fastening tapes. Extending elastic members Are, stretching force of the rear section inner portion of the elastic member, there is provided a strong development-type disposable diaper than stretching force of the crotch portion near portion.

  According to the disposable diaper of this invention, it is hard to produce a clearance gap between a wearer and fit property can be improved.

  Hereinafter, a preferred embodiment of the disposable diaper of the present invention will be described with reference to FIGS.

The disposable diaper 1 of this embodiment has the crotch part C located between the ventral part A, the dorsal part B, and the ventral part A and the dorsal part B, as shown in FIGS. Extending outward from both side portions 51 of the back side B of the main body 5 (hereinafter referred to as “X direction”. X direction: a direction perpendicular to the center line CL extending in the longitudinal direction of the disposable diaper 1A). Fastening tapes 8 and 8 are provided on each of the pair of side flap portions 6 and 6. A pair of side flap parts 6 and 6 of disposable diaper 1 of this embodiment are formed in the shape of a figure of eight. Each of the pair of side flap portions 6, 6 is formed such that side edges 61, 61 in the extending direction are inclined with respect to a center line CL extending in the longitudinal direction of the main body 5. The inclination direction of the side edges 61 and 61 is a direction toward the center of the end edge 52 of the back side portion B. The pair of fastening tapes 8, 8 of the disposable diaper 1 of the present embodiment is formed to extend in a substantially vertical direction from the side edges 61, 61 of the pair of side flap portions 6, 6 to the side edges 61. . Between the pair of fastening tapes 8, 8 of the disposable diaper 1 of the present embodiment, a stretchable member 9 extending in the width direction is disposed, and the stretchable force of the back side portion 9 a of the stretchable member 9 is reduced by the crotch Stronger than the expansion and contraction force of the side portion 9b.
As shown in FIG. 1, the disposable diaper 1 of the present embodiment is formed symmetrically with respect to the center line CL. Therefore, in the following description, the configuration on the right side shown in FIG. 1 will be mainly described.

  The disposable diaper 1 according to the present embodiment will be described in detail. The disposable diaper 1 according to the present embodiment (hereinafter also referred to as “diaper 1”) is positioned on the abdomen side of the wearer at the time of wearing as shown in FIG. A body 5 having a ventral part A, a dorsal part B located on the dorsal side, and a crotch part C disposed between the ventral part and the dorsal part is provided. This is a so-called unfolded diaper that includes a side flap portion 6 that extends outward in the width direction (X direction) and includes a fastening tape 8 on the side flap portion 6. As shown in FIG. 1, the diaper 1 has inner edges at the center in the longitudinal direction (hereinafter referred to as “Y direction”; Y direction: a direction parallel to the center line CL). The width of the both ends of the longitudinal direction (Y direction) is wider than the width of the central part of the longitudinal direction (Y direction). The diaper 1 has the target tape 10 which fastens the fastening tape 8 on the outer surface of the abdominal part A, as shown in FIG. As shown in FIG. 1, the diaper 1 has a shape that is long in the same direction as the main body 5 in a state of being expanded in a planar shape.

  As shown in FIGS. 1 and 2, the main body 5 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid retaining property interposed between the two sheets 2 and 3. The absorber 4 is provided. As shown in FIGS. 1 and 2, each of the top sheet 2 and the back sheet 3 covers the entire skin contact surface side and the non-skin contact surface side of the absorber 4, and the periphery of the absorber 4. It extends from. Further, as shown in FIG. 2, the top sheet 2 has a shorter length in the width direction (X direction) than the back sheet 3. As shown in FIG. 1, the absorbent body 4 has a vertically long shape, and both side edges thereof have a shape that is bound inward at the center in the longitudinal direction (Y direction).

  As shown in FIGS. 1 and 3, in the main body 5, side sheets 62 are arranged on the side portions 51 in the longitudinal direction (Y direction) via the top sheet 2. As shown in FIG. 1, the side sheet 62 covers the entire surface in the longitudinal direction (Y direction) of the side part 51 on the skin contact surface side of the main body 5 (surface sheet 2). As shown in FIG. 2, the side sheet 62 is joined to the surface sheet 2 at the outer end in the width direction (X direction) of the main body 5 (surface sheet 2) to form a fixing portion 63. The fixing portion 63 is formed to extend linearly in the longitudinal direction (Y direction). As shown in FIG. 2, the end portion in the width direction (X direction) of the side seat 62 is a free end. As shown in FIG. 1, an elastic member 64 for forming a three-dimensional gather is disposed and fixed in the stretched state near the free end of the crotch C. When worn, the elastic member 64 contracts from the free end due to the contraction force of the elastic member 64. A portion having a predetermined width is separated from the top sheet 2 to form a three-dimensional gather.

  As shown in FIGS. 1 and 2, the diaper 1 is joined with a side sheet 62 and a back sheet 3 that extend outward in the width direction (X direction) from the fixed portion 63 at the back side B. A flap portion 6 is formed. Similarly, the side flap part 6 is formed also in the ventral part A. That is, as shown in FIG. 1, the side flap portion 6 is a portion that extends outward in the width direction (X direction) from the side edge 51 of the main body 5 in the back side portion B and the ventral side portion A, The skin contact surface side and the non-skin contact surface side of the side flap portion 6 are formed from a side sheet 62 and a back sheet 3, respectively.

  As shown in FIG. 1, the diaper 1 includes a side sheet 62 and a back sheet 3 that extend outward in the width direction (X direction) and outward in the width direction (X direction) from the fixed portion 63 in the crotch portion C. And the leg flap part 7 are formed. As shown in FIG. 1, an elastic member 71 for forming leg gathers is extended and fixed in the longitudinal direction (Y direction) in the leg crotch portion C, as shown in FIG. Leg gathers are formed by the contraction force of the elastic member 71.

  The pair of side flap portions 6 and 6 are formed in an eight-letter shape. The side flap portion 6 is formed such that a side edge 61 in the extending direction is inclined with respect to a center line CL extending in the longitudinal direction (Y direction) of the main body 5. In addition, the inclination direction of the side edge 61 is a direction which goes to the center of the edge 52 of the longitudinal direction (Y direction) of the main body 5 in the back side part B, as shown in FIG. As shown in FIG. 1, the side edge 61 of the side flap portion 6 preferably has an angle α formed with a straight line L1 parallel to the center line CL of 5 ° to 25 °, and 7.5 ° to 22. 5 ° is more preferable, and 10 ° to 20 ° is still more preferable. Here, the angle α formed between the side edge and the straight line L1 parallel to the center line CL is the outer end of the side edge 61 of the side flap portion 6 on the edge 52 side of the back side portion B as shown in FIG. A straight line connecting 61a and the inner end 61b on the side of the leg flap 7 at the side edge 61 of the side flap portion 6 means an angle at which the straight line L1 intersects. Although the side edge 61 of the side flap part 6 of this embodiment is a straight line, the curve which a side edge may satisfy | fill the said range may be sufficient.

  The fastening tape 8 is formed so as to extend in a substantially vertical direction from the side edge 61 of the side flap portion 6 to the side edge 61. As shown in FIG. 3, each fastening tape 8 in the diaper 1 includes a hook member 82 in which a large number of engagement protrusions (not shown) are provided on the surface of the base sheet 81, and the back surface of the base sheet 81 of the hook member 82. It is formed from the sheet | seat material 83 joined to this. The hook material 82 is a portion that becomes a fastening portion of the fastening tape 8. The fastening tape 8 is provided on both sides of the back side B as shown in FIG. As shown in FIGS. 2 and 3, the sheet material 83 of the fastening tape 8 includes a portion (a wavy line portion in FIG. 2) fixed between the side sheet 62 and the back sheet 3, and a side edge of the side flap portion 6. 61 and a portion constituting a part of the fastening tape 8. Specifically, the fastening tape 8 is formed so as to extend in a substantially vertical direction with respect to the side edge 61 of the side flap portion 6, specifically, as shown in FIGS. 1 and 3, the sheet of the fastening tape 8. It means that the center in the extending direction of the material 83 is formed so as to extend in a substantially vertical direction with respect to the side edge 61 of the side flap portion 6.

  As shown in FIG. 3, the fastening tape 8 has the hook material 82 of the fastening tape 8 disposed in the central region in the extending direction in the portion of the sheet material 83 extending from the side edge 61. As shown in FIG. 3, the fastening tape 8 is formed from one sheet material 83 between the outer end 82a in the extending direction of the hook material 82 and the outer end 83a in the extending direction of the sheet material 83. And has a portion to be a knob 84. As shown in FIG. 3, the fastening tape 8 is formed from one sheet material 83 between the inner end 82 b in the extending direction of the hook material 82 and the side edge 61 of the back side portion B. It is flexible and can be bent easily.

  As shown in FIG. 1, an elastic member 9 extending in the width direction (X direction) is disposed between the pair of fastening tapes 8, 8, and the elastic force of the back side portion 9 a of the elastic member 9 is Further, it is arranged so as to be stronger than the stretching force of the crotch lower portion 9b. The elastic member 9 of this embodiment is distribute | arranged between a pair of fastening tapes 8 and 8, as shown in FIG. 1, FIG. The elastic member 9 of the present embodiment is composed of a plurality of elastic members 91, and the plurality of elastic members 91 are intermittently juxtaposed in the longitudinal direction (Y direction) as shown in FIGS. Yes. Specifically, in the present embodiment, a plurality of elastic members 91 are disposed and fixed between the sheet materials 83 and 83 of the pair of fastening tapes 8 and 8 in an expanded state, and the elastic members 91 are mutually fixed. However, it is intermittently fixed in the longitudinal direction (Y direction).

  As shown in FIG. 1, the absorbent body 4 of the main body 5 is disposed in the crotch lower portion 9 b of the elastic member 9 of the present embodiment. As shown in FIG. 1, the crotch lower portion 9 b of the present embodiment includes an elastic member 91 arranged in a portion overlapping the absorber 4 in a plan view. The body 4 is intermittently arranged in the longitudinal direction (Y direction). In the present embodiment, as shown in FIG. 1, the plurality of elastic members 91 in the crotch lower portion 9b includes a plurality of elastic members that are the elastic members 9 in the region where the absorber 4 is disposed. 91b is not arranged in the width direction (X direction) but is arranged discontinuously. That the elastic member 9 is not arranged means that it is not arranged in a portion of 60% or more with respect to the length (full width) of the absorbent body 4 in the width direction (X direction). Therefore, as shown in FIGS. 1 and 3, the elastic member 91 is included only on both side portions at the end in the longitudinal direction (Y direction) of the absorber 4. The elastic member 91 of the crotch lower portion 9b includes a part of the lower surface of the absorber 4, a part of the top sheet 2, a part of the side sheet 62, a part of the sheet material 83 of the fastening tape 8, and the back sheet 3. (See FIG. 2).

  The back side portion 9a is a portion other than the crotch portion 9b of the elastic member 9, and in this embodiment, the plurality of elastic members 91 are overlapped with the absorber 4 as shown in FIG. It is intermittently juxtaposed in the longitudinal direction (Y direction) in the part which does not become. In the present embodiment, as shown in FIG. 1, the plurality of elastic members 91 in the back side portion 9 a are not arranged in the vicinity of the absorbent body 4 because the elastic members 91 are not disposed. In other areas, they are continuously arranged. As shown in FIG. 1, the interval between the discontinuous portions of the elastic member 91 in the back side portion 9a is the same as the interval between the discontinuous portions of the elastic member 91 in the crotch portion 9b. The elastic member 91 of the back side portion 9a is arranged between the top sheet 2, a part of the side sheet 62, a part of the sheet material 83 of the fastening tape 8, and the back sheet 3 (see FIG. 2). .

  It is determined by measuring the following samples that the stretch force of the back side portion 9a of the stretch member 9 is stronger than the stretch force of the crotch portion 9b.

<Measurement method of contractile force>
As shown in FIG. 3, the site | part in which the expansion-contraction member 9 between the pair of fastening tapes 8 and 8 is arrange | positioned is cut from the diaper 1 of the expanded state. As shown in FIG. 2, the cut piece P has a rectangular shape that is long in the width direction (X direction). The composite material includes a part of 62, a part of the sheet material 83 of the fastening tape 8, and a part of the back sheet 3. Next, the cut piece P is further cut in the width direction (X direction) to obtain a sample P1 of the back side portion 9a and a sample P2 of the crotch portion 9b. In this embodiment, since the absorber 4 is arranged in the crotch lower portion 9b, the cut piece P is positioned at the edge in the longitudinal direction (Y direction) of the absorber 4 in the width direction (X direction). To obtain a sample P2 of the crotch lower portion 9b including a part of the absorber 4 and a sample P1 of the back side portion 9a not including the absorber 4. Next, the stretching magnification is obtained from the length of each of the samples P1 and P2 in the stretched state and the length in the natural state, and each of the samples P1 and P2 is placed on a Tensilon tensile tester (manufactured by Orientec) with a chuck distance of 100 mm (natural The sample can be changed according to the length of the sample in the state) and stretched at a constant speed of 300 mm / min to the obtained stretching magnification. The stress at this time is defined as a contraction force.

The material for forming the diaper 1 of the present embodiment will be described.
As the side sheet 62 for forming the top sheet 2, the back sheet 3, the absorbent body 4, the three-dimensional gathers and the leg gathers, it can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. . For example, a liquid-permeable nonwoven fabric, an apertured film, or a laminate of these can be used as the top sheet 2, and a resin film or a laminate of a resin film and a nonwoven fabric can be used as the back sheet 3. Can do. As the absorbent body 4, a fiber aggregate of fiber materials such as pulp or a material in which a superabsorbent polymer is supported on a fiber aggregate is used that is wrapped with a covering material such as tissue paper or a water-permeable nonwoven fabric. Can do. As the side sheet 62, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used. The elastic member 64 for forming a three-dimensional gather, the elastic member 71 for forming leg gathers, and the elastic member 91 disposed between the pair of fastening tapes 8 and 8 include natural rubber, polyurethane, and polystyrene-polyisoprene copolymer. A thread-like stretchable material made of a polystyrene-polybutadiene copolymer, a polyethylene-α-olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.

  As an adhesive used for fixing the elastic member 64 for forming the three-dimensional gather, the elastic member 71 for forming the leg gathers, and the elastic member 91 disposed between the pair of fastening tapes 8 and 8, a disposable diaper or the like is usually used. If it is used for this absorbent article, it can be used without particular limitation.

  The fixing portion 63 between the topsheet 2 and the sidesheet 62 is usually formed by joining the topsheet 2 and the sidesheet 62 with an adhesive, heat fusion, or the like used for absorbent articles such as disposable diapers. .

  The hook material 82 and the sheet material 83 forming the fastening tape 8 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, as the hook material 82, “Magic tape (registered trademark)” (manufactured by Kuraray), “Quicklon (registered trademark)” (manufactured by YKK), “Majikurosu (registered trademark)” (manufactured by Kanebo Bell Touch) The male member etc. in etc. can be used. As the sheet material 83, a synthetic resin such as polyethylene, polypropylene, or polyethylene terephthalate, and a sheet or nonwoven fabric made of a composite material of two or more of these synthetic resins can be used. In particular, a sheet or nonwoven fabric made of polypropylene, or It is preferable to use a sheet or nonwoven fabric made of a composite material of polypropylene and polyethylene terephthalate from the viewpoint of being easily joined to the hook member 82 by ultrasonic embossing or heat embossing. As the base sheet 81 of the hook material 82, a thermoplastic resin such as polyethylene or polypropylene can be used. As the engagement protrusion (not shown) of the hook member 82, a hook-shaped or hook-shaped one can be used.

  The target tape 10 is made of a loop material having a surface structure that can be engaged with an engaging protrusion (not shown) of the hook material 82. As such a loop material, the hook material 82 is pressed to press the hook material 82. What can fix | fasten can be used without a restriction | limiting in particular. For example, the female member in the various well-known mechanical hook-and-loop fastener mentioned above can be used, for example. Further, the outer surface of the ventral portion A can be made of a material that can be directly engaged with an engagement protrusion (not shown) of the hook member 82, for example, a non-woven fabric that is rich in engagement.

Next, the effect at the time of using the diaper 1 of this embodiment of this invention mentioned above is demonstrated.
As shown in FIGS. 1 to 3, the diaper 1 of the present embodiment is formed such that each of the pair of side flap portions 6, 6 is inclined, and the pair of fastening tapes 8, 8 is the side flap portion 6. The side edge 61 is formed so as to extend in a substantially vertical direction. Therefore, when the fastening tape 8 is engaged with the target tape 10 and the diaper 1 is mounted, the diaper 1 is placed so that the dorsal side B of the diaper 1 is above the ventral side A as shown in FIG. Forming a waist opening and a pair of leg openings. Therefore, even if wrinkles extending in the waistline direction due to the stretchable material expanding and contracting due to the change in the abdominal circumference at the time of wearing, downward from the upper side toward the back side B from the abdominal side A Since wrinkles are uniformly generated in the direction, only the wrinkles that are inclined downward as in the conventional case are not generated. In this way, a wrinkle that is inclined downward is unlikely to occur, and an elastic member 9 extending in the width direction is disposed between the pair of fastening tapes 8, 8 of the diaper 1. Since the expansion / contraction force of the portion 9a is stronger than the expansion / contraction force of the crotch lower portion 9b, a gap is hardly generated between the disposable diaper and the wearer, and the fit is improved.

  Moreover, since the elastic member 9 is distribute | arranged between a pair of fastening tapes 8 and 8, as the diaper 1 of this embodiment is shown to FIG. 1, FIG. Since it can transmit directly to the fastening tape 8, a clearance gap does not arise easily between a disposable diaper and a wearer, and fit property improves.

  Moreover, as shown in FIGS. 1 and 2, the diaper 1 of the present embodiment has the absorbent body 4 disposed in the crotch lower portion 9 b of the elastic member 9, and the region where the absorbent body 4 is disposed. The elastic member 91 is not arranged. Therefore, wrinkles hardly occur in the absorber, and leakage due to wrinkles hardly occurs.

  The absorbent article of this invention is not restrict | limited to the disposable diaper of this embodiment mentioned above at all, and can be changed suitably.

  For example, in the above-described diaper 1 of the present embodiment, as shown in FIGS. 1 and 2, the elastic member 9 is disposed between the pair of fastening tapes 8, 8. The diaper 1 may be arranged in the width direction (X direction).

  In the diaper 1 of the present embodiment described above, as shown in FIGS. 1 and 2, the elastic member 9 is a plurality of thread-like elastic members 91, but both natural rubber, polyurethane, and polystyrene-polyisoprene are used. It may be a film-like stretchable material made of a polymer, a polystyrene-polybutadiene copolymer, a polyethylene-α olefin copolymer such as ethyl acrylate-ethylene, or the like.

  Moreover, in the diaper 1 of this embodiment mentioned above, as shown to FIG. 1, FIG. 2, although the absorber 4 is distribute | arranged to the crotch lower part 9b of the expansion-contraction member 9, it is not distribute | arranged. Also good. At that time, the back side portion 9a and the crotch bottom portion 9b of the expansion / contraction member 9 are distinguished from each other in the width direction (X direction) at a position where the entire expansion member 9 is equally divided in the longitudinal direction (Y direction). The cut piece near the edge 52 of one back side portion B is a back side portion 9a, and the other cut piece near the crotch portion C is a crotch portion 9b.

  Moreover, in the diaper 1 of this embodiment mentioned above, as shown to FIG. 1, FIG. 2, the several elastic member 91b of the crotch lower part 9b is distribute | arranged discontinuously, and it is near back side part. A part of the plurality of elastic members 91a of the portion 9a is discontinuously disposed, but the elastic members 91a and 91b may be disposed continuously. In addition, when the elastic members 91a and 91b are continuously arranged, the portion where the absorber 4 is located may be finely divided in the width direction (X direction) so that the elastic force is not expressed.

FIG. 1 is a developed plan view showing a state in which a disposable diaper according to an embodiment of the present invention is developed and extended. 2 is a cross-sectional view taken along line X1-X1 of FIG. FIG. 3 is an enlarged plan view of a main part of the disposable diaper shown in FIG. Drawing 4 is a side view showing the wearing state of the disposable diaper which is an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Main body 51 Side part 52 End edge 6 Side flap part 61 Side edge 61a Outer end, 61b Inner end 62 Side sheet 63 Fixed part 64 Elastic member 7 Leg flap part 71 Elastic member 8 Fastening Tape 81 Base Sheet 82 Hook Material 82a Outer End, 82b Inner End 83 Sheet Material 84 Knob 9 Stretching Member 9a Back Side Part 9b Crotch Part 91 Elastic Member 10 Target Tape

Claims (5)

A pair of side flaps extending outward in the width direction from both sides of the dorsal side in a main body having a ventral part, a dorsal part, and a crotch part located between the ventral part and the dorsal part Each part is a deployable disposable diaper with a fastening tape,
The pair of side flap portions are formed in an eight-letter shape, and each of the pair of side flap portions is inclined with respect to a center line extending in the longitudinal direction of the main body. Formed,
The direction of inclination of the side edge is a direction toward the center of the edge of the back side part,
The pair of fastening tapes are formed to extend in a substantially vertical direction with respect to the side edges from the side edges of the pair of side flap portions,
A stretchable member extending in the width direction is disposed between the pair of fastening tapes, and the expandable force of the stretchable member near the back side is stronger than the stretchable force of the crotch lower portion. Disposable diapers.   The unfoldable disposable diaper according to claim 1, wherein the elastic member is disposed between the pair of fastening tapes.   The deployable disposable diaper according to claim 1 or 2, wherein the elastic member is a plurality of elastic members, and the plurality of elastic members are arranged intermittently in the longitudinal direction.   The unfoldable disposable diaper according to any one of claims 1 to 3, wherein an absorber of the main body is disposed on a portion closer to the crotch portion of the elastic member.   The unfoldable disposable diaper according to claim 4, wherein the stretchable member is not disposed in a region where the absorber is disposed near the crotch portion of the stretchable member.

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