JP5243642B1 - Disposable diapers - Google Patents

Abstract

An object of the present invention is to suitably fit a wearer's leg circumference while sufficiently covering the wearer's buttocks.
In the disposable diaper according to the present invention, the length W1 between the ends of the first leg opening region R1 in the product width direction W at the intersection point G is a region closer to the rear waistline region 30 than the intersection point G is. The lengths of the ends of the first leg opening region R1 in the product width direction W are shorter than the lengths of the ends of the first leg opening region R1 in the product width direction W. W2 is configured to be the shortest in the predetermined region R, and the length W1 of the first region R10 in the product width direction W at the intersection G is the second region R20 in the product width direction W in the predetermined region R. It is comprised so that it may become longer than length W2.
[Selection] Figure 1

Description

  The present invention relates to a disposable diaper.

  Conventionally, it has a front waistline region, a rear waistline region, and a crotch region located between the front waistline region and the rear waistline region, and a pair of leg periphery openings are formed, and the inseam region is A pants-type disposable diaper having an absorbent body extending over the front waistline region and the rear waistline region is known.

  In such a pants-type disposable diaper, a structure is provided in which an elastic member is provided that extends from the front waistline region to the rear waistline region across the crotch region in order to support both the fit to the wearer's leg circumference and the cover of the wearer's buttocks Is known (see, for example, Patent Document 1).

Special table 2000-501962 gazette

  However, since the disposable diaper is configured to extend back and forth across the crotch region of the wearer, the applicant applies a force in a direction in which the interval between the elastic members is narrowed when the disposable diaper is worn. Added a problem that the wearer's buttocks could not be covered sufficiently.

  In addition, in such disposable diapers, the applicant needs to arrange the above-mentioned elastic member in a state inclined with respect to the product longitudinal direction or the product width direction, and there is a problem that the manufacturing method becomes complicated. .

  Then, this invention is made | formed in view of the above-mentioned subject, and provides the disposable diaper which can fit suitably with respect to a wearer's leg periphery part, fully covering a wearer's buttocks. For the purpose.

  The first feature of the present invention includes a front waistline region, a rear waistline region, and a crotch region positioned between the front waistline region and the rear waistline region, and a pair of leg opening portions are formed. And a product longitudinal direction extending from the front waistline region to the rear waistline region, and a product width direction orthogonal to the product longitudinal direction, comprising an absorber extending across the crotch region and extending to the front waistline region and the rear waistline region A leg elastic member formed to extend from the front waistline region to the rear waistline region, straddling the crotch region along the leg opening, and the leg elastic member. And a flange-side elastic member extending in the product longitudinal direction, and each of the leg-hole openings has a first leg-around where the flange-side elastic member is arranged An open region and the first A second leg-hole opening region disposed on the front waistline region side with respect to the leg-hole opening region, and an extension line of the buttocks-side elastic member or the buttocks-side elastic member and the leg-hole opening portion, Is configured to be a boundary point between the first leg-hole opening area and the second leg-hole opening area, and an end of the first leg-hole opening area in the product width direction at the intersection The length between the portions is configured to be shorter than the length between the end portions of the first leg periphery opening region in the product width direction in the region on the rear waistline region side than the intersection, The lengths of the ends of the second leg-hole opening area in the product width direction are configured to be the shortest in the predetermined area, and the length of the first leg-hole opening area in the product width direction at the intersection is set. The length between the ends is the predetermined area It is summarized as that of the being configured to be longer than the length of the end portions of the second leg hole opening area in the product width direction.

  As described above, according to the present invention, it is possible to provide a disposable diaper that can be suitably fitted to the wearer's leg circumference while sufficiently covering the wearer's buttocks.

It is an expansion | deployment top view of the disposable diaper which concerns on embodiment of this invention. It is FF sectional drawing in the expansion | deployment top view of the disposable diaper which concerns on the 1st Embodiment of this invention. It is an enlarged view of the leg opening part 35 in the expansion | deployment top view of the disposable diaper which concerns on the 1st Embodiment of this invention. It is an enlarged view of the leg opening part 35 in the expansion | deployment top view of the disposable diaper which concerns on the 1st Embodiment of this invention. It is AA sectional drawing and BB sectional drawing in the expansion | deployment top view of the disposable diaper which concerns on the 1st Embodiment of this invention.

(First embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 5, the disposable diaper 10 which concerns on the 1st Embodiment of this invention is demonstrated.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

  FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment. FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along the line FF shown in FIG.

  As shown in FIG. 1, the disposable diaper 10 has a front waistline region 20, a crotch region 25, and a rear waistline region 30. Further, the disposable diaper 10 is formed with a pair of leg-hole openings 35.

  Here, the front waistline region 20 is a portion in contact with the wearer's front waistline portion, the back waistline region 30 is a portion in contact with the wearer's back waistline portion, and the crotch region 25 is in contact with the front waistline region 20 and the rear. It is a part located between the waist area 30.

  In the present embodiment, a direction from the front waistline region 20 to the rear waistline region 30 is referred to as a product longitudinal direction L, and a direction orthogonal to the product longitudinal direction L is referred to as a product width direction W.

  The disposable diaper 10 includes an absorbent body 40 that extends across the crotch region 25 and extends to the front waistline region 20 and the rear waistline region 30. As shown in FIG. 2, the absorber 40 is comprised by the absorber core 40a and the core wrap 40b.

  The absorbent core 40a is the same as that used in conventional disposable diapers, and the absorbent core 40a can be appropriately configured using known members and materials such as pulverized pulp and high-absorption polymer. The absorber core 40a is wrapped with a sheet-like core wrap 40b.

  The core wrap 40b is a sheet that covers the absorbent core 40a. At least a part of the core wrap 40b on the skin contact surface side is composed of various fiber nonwoven fabrics or tissue sheets having liquid permeability.

For example, as the member constituting the core wrap 40b, and air-through fibrous nonwoven fabric of weight approximately 10 to 30 g / ^{m 2,} and spunbonded nonwoven fabric, SMS (spunbond - Merutoburon - spunbond) nonwoven fabric and a mass of about 10 to 30 g / m ^Two tissue sheets can be used.

  Moreover, the absorber 40 may have the low rigidity area | region 110 in which the fabric weight of the absorber core 40a is lower than the other site | part of the absorber 40 in the back waist area 30, or the absorber core 40a does not exist. Further, the low rigidity region 110 may be formed to extend to the vicinity of the end E1 on the rear waistline region 30 side in the product longitudinal direction L of the absorbent body 40.

  For example, the width of the low rigidity region 110 in the product width direction W may become wider toward the end E1 on the rear waistline region 30 side in the product longitudinal direction L. More specifically, the shape of the low-rigidity region 110 may be a wedge shape in the plan view of the disposable diaper 10.

  Further, as shown in FIG. 2, a liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40, and the back surface side (non-skin contact surface) of the absorber 40. Side) is provided with a liquid-impermeable back sheet 60a. Furthermore, as shown in FIG. 2, the exterior sheet 60 (nonwoven fabric sheet) may be provided on the back surface side (non-skin contact surface side) of the back sheet 60a.

  Side flaps 70 are respectively provided on the side edges of the absorbent body 40 in the product width direction W. The side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets.

  The disposable diaper 10 includes a pair of fastening tapes 90 in the rear waistline region 30 and a target tape 90a in a predetermined region on the non-skin contact surface side of the front waistline region 20.

  Here, the fastening diaper 10 can be hold | maintained to a wearer's body by the fastening tape 90 being attached to the target tape 90a.

  Moreover, as shown in FIG. 1, the disposable diaper 10 which concerns on this embodiment is provided in the absorber arrangement | positioning area | region where the absorber 40 is arrange | positioned in the crotch region 25, and is equipped with the crotch expansion-contraction part 200a which can be expanded-contracted. May be.

  Specifically, as shown in FIG. 2, the crotch expansion / contraction part 200a may be provided between the absorber 40 (core wrap 40b) and the back sheet 60a.

  Here, the crotch stretchable portion 200a may be stretchable in the product longitudinal direction L, may be stretchable in the product width direction W, or stretchable in both the product longitudinal direction L and the product width direction W. It may be possible.

  Furthermore, the crotch stretchable part 200a may be configured to extend to the front waistline region 20 side and the back waistline region 30 side across the center line O of the disposable diaper 10 in the product longitudinal direction L.

  In the present embodiment, the crotch stretchable part 200a may be constituted by a stretchable sheet member.

  For example, the stretchable sheet member includes a stretchable film formed by melting a thermoplastic elastomer resin such as urethane or styrene, a stretchable nonwoven fabric composed of stretchable fibers, a stretchable film or a stretchable nonwoven fabric. A composite sheet obtained by laminating a non-stretchable sheet that has been cut or weakened can be used.

  In addition, instead of the stretchable sheet member, the crotch stretchable part 200a may be configured by aligning thread-like and band-like stretchable elastic members made of polyurethane elastic fiber or natural rubber in parallel with each other.

  In such a case, considering the rigidity of the absorbent core 40a and the rigidity of the other members constituting the disposable diaper 10, the thickness of the elastic member to be used and the pitch to be arranged can be appropriately selected. It is preferable that the entire side edge portion in the product width direction W of the absorbent core 40a is in a contracted state when the stretched state is set.

  Specifically, the expansion / contraction rate of the crotch expansion / contraction part 200a is preferably 1.2 times or more and 1.8 times or less. For example, in this embodiment, the expansion / contraction ratio of the crotch expansion / contraction part 200a may be set to 1.4 times.

  The expansion / contraction rate means the degree of expansion / contraction of the crotch expansion / contraction part 200a in the expansion / contraction direction (product longitudinal direction L in this embodiment), and is defined as follows.

  Expansion rate = (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the maximum expansion state) / (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the natural state)

  In addition, in this specification, this expansion / contraction rate shall be measured as follows, for example.

  1stly, when the disposable diaper 10 is enclosed with the package etc., the disposable diaper 10 is taken out from a package, and it is 60 in the atmosphere of 20 degreeC +/- 2 degreeC and relative humidity 60% +/- 5% RH in the state. Leave for a minute.

  Second, the length in the stretch direction of the desired region in such a state (ie, the natural state), and the length in the stretch direction of the desired region when stretched from the natural state to a state where wrinkles by the elastic member cannot be visually confirmed. Measure (ie, maximum stretched state).

  Thus, by setting the expansion / contraction rate of the crotch expansion / contraction part 200a to 1.2 times or more and 1.8 times or less, it is possible to suitably follow the expansion and contraction of the wearer's skin.

  For example, when the wearer takes a forward bending posture such that the front side of the body contracts, the skin on the buttocks side of the wearer extends about 30% relative to the stretched body.

  That is, when the expansion ratio of the crotch expansion / contraction part 200a is 1.2 times or less, the crotch expansion / contraction part 200a is not sufficiently contracted in the natural state, and the disposable diaper 10 is compared with the case where the crotch expansion / contraction part 200a is not provided. The difference in easiness of bending is small, and the front waistline region 20 cannot stand up at a desired position.

  On the other hand, if the expansion ratio of the crotch expansion / contraction part 200a is larger than 1.8 times, the contraction dimension in the contraction direction of the crotch expansion / contraction part 200a becomes too large, so that the region where the crotch expansion / contraction part 200a exists is more than along the body. The disposable diaper 10 is likely to be in a close contact state, and easily displaced downward from the wearer.

  As shown in FIG. 1, a pair of leg stretchable parts (which are formed along the leg opening 35 and extend at least in the product longitudinal direction L) are formed on the surface side (top sheet 50 side) of the absorber 40. Leg gather) 75 is provided.

  The leg stretchable part 75 is longer than the crotch stretchable part 200a in the product longitudinal direction L, and is provided outside the crotch stretchable part 200a in the product width direction W.

  For example, as shown in FIG. 1, the leg stretchable portion 75 may be configured by a predetermined number of leg elastic members (three elastic members in the example of FIG. 1) 75.

  Moreover, the leg expansion-contraction part 75 may be formed with the elastic sheet member similarly to the crotch expansion-contraction part 200a and the waist expansion-contraction part 100.

  Specifically, the width of the stretchable sheet member (the width in the product width direction W in the natural state of the disposable diaper 10) is preferably 5 mm or more and 45 mm or less, and preferably 12.5 mm or more and 35 mm or less in at least the crotch region 25. It is more preferable.

  Here, when the width of the stretchable sheet member is less than 5 mm, the effect of substantially following the wearer's leg around the surface does not appear, and when the width of the stretchable sheet member exceeds 35 mm, The area along the side becomes wide, and the stretchable sheet member is easily wound around the wearer's body or turned up.

  The expansion / contraction rate of the leg expansion / contraction part 75 is preferably 1.5 to 2.4 times. For example, in this embodiment, the expansion / contraction rate of the leg expansion / contraction part 75 may be set to 1.9 times. The expansion / contraction rate of the leg expansion / contraction part 75 shall be prescribed | regulated similarly to the expansion / contraction rate of the above-mentioned crotch expansion / contraction part 200a.

  Further, as shown in FIG. 1, a pair of leg side gathers 80 extending along the product longitudinal direction L may be provided inside the pair of leg stretchable portions 75 (near the center in the product width direction W). .

  As shown in FIG. 1, the leg side gather 80 includes a joint portion 81 and a free end portion 82 that is located on the opposite side of the joint portion 81 and in which an elastic member 83 is disposed.

  Here, the joining portion 81 may be joined to the top sheet 50, the back sheet 60a, or the exterior sheet 60.

  Further, the end of the free end portion 82 in the product longitudinal direction L is joined to the top sheet 50. The joint portion 81 is disposed between the crotch stretchable portion 200a and the leg stretchable portion 75 in the product width direction W.

  When worn, the leg side gather 80 rises with the joint portion 81 as the base end portion, and the free end portion 82 contacts the wearer's skin with the apex portion.

  As shown in FIG. 1, the disposable diaper 10 according to this embodiment includes a pair of buttocks side elastic members 101 extending in the product longitudinal direction L.

  Here, the buttocks side elastic member 101 is disposed outside the leg elastic member 75 in the product width direction W.

  Although FIG. 1 shows a case in which one heel side elastic member 101 is provided per side, the present invention is not limited to this example, and a plurality of heel side elastic members 101 are provided. It is also applicable to the cases that are shown.

  Here, the number of the buttocks side elastic members 101 provided is preferably about 1 to 3 per side.

  Moreover, it is preferable that the distance D1 between the outer side of the product width direction W of the collar part side elastic member 101 and the leg elastic member 75 is 10 mm or more and 30 mm or less.

  When the distance D1 is less than 10 mm, the effect of pulling up the crotch region 25 so as to spread outward in the product width direction W by the buttocks side elastic member 101 is difficult to be exhibited.

  On the other hand, when the distance D1 is longer than 30 mm, wrinkles generated between the leg elastic member 75 and the buttock side elastic member 101 are caused by the contraction force of the leg elastic member 75 and the buttock side elastic member 101. The effect of pressing against the body is insufficient, and a gap is likely to be generated between the leg elastic member 75 and the buttocks side elastic member 101 and the wearer's body, and the wearer's buttocks cannot be sufficiently covered. End up.

  Moreover, the fineness of the buttock side elastic member 101 is configured to be smaller than 780 Dtex and larger than 210 Dtex, and the expansion / contraction rate of the buttock side elastic member 101 is about 1.8 to 2.4 times. It may be configured.

  According to such a configuration, it is possible to avoid a situation in which the sheet around the buttocks side elastic member 101 is excessively contracted and the disposable diaper 10 is caught on the skin contact surface side of the disposable diaper 10, The disposable diaper 10 can be brought into close contact with the wearer's buttocks.

  Moreover, as shown in FIG. 1, in the disposable diaper 10 which concerns on this embodiment, each of the leg periphery opening part 35 has 1st leg periphery opening area | region R1 and 2nd leg periphery opening area | region R2. . Here, the second leg-hole opening region R2 is disposed closer to the front waistline region 20 than the first leg-hole opening region R1.

  Further, the buttocks side elastic member 101 is configured to be disposed in the first leg-hole opening region R1, and not to be disposed in the second leg-hole opening region R2.

  That is, as shown in FIG. 1, the intersection point G between the buttock side elastic member 101 (or an extension line of the buttock side elastic member 101) and the leg hole opening 35 is the first leg hole opening region R1 and the second leg hole. It is comprised so that it may become a boundary point with opening area | region R2.

  Further, the length W1 between the end portions of the first leg opening region R1 in the product width direction W is configured to be the shortest at the intersection point G.

  In addition, when there are a plurality of buttocks elastic members 101 per side, with respect to the buttocks elastic member 101 that is the innermost in the product width direction W, the above-described intersection G and the first leg-hole opening region R1 Ends shall be defined.

  That is, the length W1 between the end portions of the first leg opening region R1 in the product width direction W at the intersection point G is the first leg periphery in the product width direction W in the region on the rear waistline region 30 side from the intersection G. It is comprised so that it may become shorter than the length of the edge parts of opening area | region R1.

  On the other hand, the length W2 between the ends of the second leg opening region R2 in the product width direction W is configured to be the shortest in the predetermined region R.

  Here, the length W1 between the ends of the first leg opening region R1 in the product width direction W at the intersection G is equal to the lengths of the second leg opening regions R2 in the product width direction W in the predetermined region R. It is comprised so that it may become more than length W2.

  In other words, the first leg-hole opening region R1 in the product width direction W is configured to have a convex shape toward the inside in the product width direction W in the plan view of the disposable diaper 10, as shown in FIG. The first curve A is formed by a second curve B configured to be convex toward the outside in the product width direction W.

  For example, as shown in FIG. 4, the first curve A is configured to have an arcuate convex shape toward the inner side W <b> 1 in the product width direction W, and the second curve B is formed in the product width direction W. You may be comprised so that it may become a circular-arc-shaped convex shape toward the outer side Wo.

  As shown in FIG. 4, the angle θ formed between the tangent line of the second curve B at the intersection G and the buttocks side elastic member 101 (or an extension line of the buttocks side elastic member 101) is 25 ° to 35 °. It may be configured as follows.

  According to such a configuration, when the buttock side elastic member 101 contracts, the line of the end portion of the leg opening 35 becomes a gentle shape, and the shape of the buttock of the wearer can be smoothly fitted. It can be set as the external appearance which can cover a wearer's buttocks.

  Moreover, according to this structure, since the sheet | seat itself, such as a nonwoven fabric which covers a wearer's buttocks, also comes to contact | adhere to a wearer's body, even if a wearer's movement is added, a disposable diaper The state where 10 covered the wearer's buttocks can be maintained.

  Further, as shown in FIG. 1, the buttocks side elastic member 101 is located on the inner side in the product width direction W of the end E1 on the rear waistline region 30 side of the leg elastic member 75 and the base end portion 90a of the fastening tape 90 and inseam You may arrange | position so that it may overlap with the line X which ties the edge part E2 by the side of the area | region 25. FIG.

  As shown to Fig.5 (a), the two or more leg elastic members 75 arrange | positioned near the absorber core 40a (absorber 40) among the leg elastic members 75 are three or more layers of non-stretchable sheets. (For example, the side flap 70, the back sheet 60a, and the exterior sheet 60) may be hold | maintained.

  On the other hand, as shown in FIG.5 (b), the buttocks side elastic member 101 may be hold | maintained by the two-layer non-elastic sheet | seat (for example, the side flap 70 and the exterior sheet 60).

  Here, as shown in FIG. 1, the region where the crotch stretchable portion 200 a is arranged and the region where the buttock side elastic member 101 is arranged are arranged so as to overlap at least partially in the product longitudinal direction L. Also good.

  According to the disposable diaper 10 according to the present embodiment, the buttock side elastic member 101 is disposed on the outer side Wo of the leg elastic member 75 in the product width direction W, and the buttock side elastic member 101 is shaped at the end of the leg opening 35. By contracting along the (line), the end portion of the leg opening 35 in the crotch region 25 and the front waistline region 20 is located on the rear waistline region 30 side and the outer side Wo of the disposable diaper 10 in the product width direction W. Can be drawn towards.

  As a result, the disposable diaper 10 is suitably applied to the leg circumference inguinal region of the wearer's abdomen while covering the wearer's buttocks wide in the width direction and preventing the disposable diaper 10 from entering the crotch region 25. Can be fitted.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

DESCRIPTION OF SYMBOLS 10 ... Disposable diaper 20 ... Front waist area 25 ... Inseam area 30 ... Back waist area 35 ... Leg opening 40 ... Absorber 40a ... Absorber core 40b ... Core wrap 50 ... Top sheet 60a ... Back sheet 60 ... Exterior sheet 70 ... Side flap 75 ... Leg stretchable part 75 ... Leg elastic member 80 ... Leg side gather 81 ... Joining part 82 ... Free end part 90 ... Fastening tape 90a ... Target tape 101 ... Hip side elastic member 110 ... Low-rigid area 200a ... Crotch stretchable part R1 ... First leg opening area G ... Intersection R2 ... Second leg opening area R ... Predetermined area

Claims (8)

A front waistline region, a back waistline region, and a crotch region located between the front waistline region and the back waistline region;
A pair of leg openings are formed,
An absorbent body extending across the crotch region and extending to the front waistline region and the rear waistline region,
A disposable diaper having a product longitudinal direction from the front waistline region to the rear waistline region, and a product width direction orthogonal to the product longitudinal direction,
A leg elastic member formed so as to extend from the front waistline region to the rear waistline region across the crotch region along the leg opening.
It is disposed outside the leg elastic member in the product width direction, and includes a buttocks side elastic member extending in the product longitudinal direction,
Each of the leg-hole openings includes a first leg-hole opening region in which the buttock-side elastic member is disposed, and a second leg-hole disposed in the front waist region side of the first leg-hole opening region. An open area,
An intersection of the buttocks-side elastic member or an extension line of the buttocks-side elastic member and the leg-hole opening is configured as a boundary point between the first leg-hole opening area and the second leg-hole opening area. And
The lengths of the end portions of the first leg opening region in the product width direction at the intersection point are the first leg opening region in the product width direction in the region on the rear waist region side from the intersection point. It is configured to be shorter than the length between the ends of
The length between the ends of the second leg opening region in the product width direction is configured to be the shortest in the predetermined region,
The length of the end portions of the first leg-hole opening region in the product width direction at the intersection is equal to or longer than the length of the end portions of the second leg-hole opening region in the product width direction in the predetermined region. The disposable diaper characterized by being comprised.   The opening area around the first leg is directed outward in the product width direction with respect to a first curve configured to be convex toward the inside in the product width direction in a plan view of the disposable diaper. The disposable diaper according to claim 1, wherein the disposable diaper is formed by a second curve configured to have a convex shape. The second curve is configured to have an arcuate convex shape toward the outside in the product width direction,
The angle formed by the tangent line of the second curve at the intersection and the extension line of the buttocks-side elastic member or the buttocks-side elastic member is configured to be 25 ° to 35 °. The disposable diaper according to 2.   The disposable diaper according to claim 2 or 3, wherein the first curve is configured to have an arcuate convex shape toward the inside in the product width direction. In the region around the rear waist, provided with a fastening tape,
The buttocks side elastic member is a line connecting the end of the leg elastic member on the rear waistline side and the end of the fastening tape on the inner side in the product width direction and the end on the crotch region It arrange | positions so that it may overlap, The disposable diaper as described in any one of Claims 1 thru | or 4 characterized by the above-mentioned. The absorber has an absorber core,
Among the leg elastic members, two or more leg elastic members arranged near the absorber core are held by three or more layers of non-stretchable sheets,
The disposable diaper according to any one of claims 1 to 5, wherein the buttocks side elastic member is held by a two-layer non-stretchable sheet.   The disposable diaper according to any one of claims 1 to 6, further comprising a crotch expansion / contraction portion formed in an absorber arrangement region where the absorber is arranged in the crotch region.   The area where the crotch stretchable part is arranged and the area where the collar side elastic member is arranged are arranged so as to overlap at least partially in the product longitudinal direction. Disposable diapers.

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