TWI551275B - Disposable disposable diaper - Google Patents

Description

Disposable disposable diaper

The present invention relates to a disposable disposable diaper.

Conventionally, there is known a front waist region, a back waist region, and a subgingival region between the front waist region and the rear waist region, and a pair of leg openings are formed, and the armpit is formed A disposable diaper that extends to the front waist region and the absorbent body of the aforementioned back waist region.

In such a pants-type disposable diaper, there is known a cross-submarine field in order to support both the fit to the wearer's leg circumference and the wearability of the wearer's buttocks. The structure of the elastic member extending from the front waist region to the back waist region (for example, refer to Patent Document 1).

[prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Publication No. 2000-501962

However, the Applicant has found that such disposable disposable diapers are oriented toward the front and rear of the underarm region which constitutes the cross-wearer, so that when such a disposable disposable diaper is worn, the above-mentioned elasticity is applied. When the members are biased in a direction in which the distance between the members is narrowed, there is a problem that the wearer's buttocks cannot be sufficiently covered.

Further, the Applicant has found that in such a disposable disposable diaper, it is necessary to dispose the above-described elastic member in a state of being inclined with respect to the longitudinal direction of the product or the width direction of the product, and there is a problem that the manufacturing method is complicated. .

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a method in which a wearer's buttocks can be sufficiently covered, and a wearer's leg circumference can be appropriately attached. Diaper.

According to a first aspect of the present invention, a front waist region, a back waist region, and a crotch region between the front waist region and the back waist region are formed with a pair of leg openings and are provided with: The absorbent body extending across the axillary region to the front waist region and the rear waist region further has a product length direction from the front waist region toward the rear waist region; and a product width orthogonal to the longitudinal direction of the product A disposable disposable diaper having a leg elastic member formed along the leg opening portion and extending from the front waist region to the rear waist region along the armpit opening; The leg elastic member is disposed on the outer side in the width direction of the product, and the buttocks side elastic member extending in the longitudinal direction of the product, and each of the leg-opening portions has a first leg-opening in which the hip-side elastic member is disposed. Area; and more than the first leg circumference opening area The second leg-surrounding opening region is disposed on the front waist region side, and the intersection of the extension line of the buttocks-side elastic member or the buttocks-side elastic member and the leg-opening portion is the first leg-opening region and the first In the boundary between the two leg-opening regions, the length of the end portions of the first leg-surrounding opening regions in the width direction of the product at the intersection is the width of the product that is larger than the intersection point on the side of the rear waistline region. The lengths of the end portions of the first leg-opening region in the web direction are shorter, and the lengths of the end portions of the second leg-opening region in the product width direction are the shortest in the predetermined region. The length of the end portions of the first leg-opening region in the width direction of the product in the intersection is the length of the end portions of the second leg-opening region in the product width direction of the predetermined region.

10‧‧‧Disposable disposable diapers

20‧‧‧front waist area

25‧‧‧胯下域

30‧‧‧Back waist area

35‧‧‧ leg opening

40‧‧‧ absorber

40a‧‧‧Absorbing body core

40b‧‧‧ core cladding

50‧‧‧ top sheet

60a‧‧‧back sheet

60‧‧‧Outer sheets

70‧‧‧Flanking

75‧‧‧ leg extension

75‧‧‧ Leg elastic members

80‧‧‧Thigh side flap

81‧‧‧ joint part

82‧‧‧Free end section

90‧‧‧ buckle

90a‧‧‧Target belt

101‧‧‧ Hip side elastic members

110‧‧‧Low rigid area

200a‧‧‧Under the expansion and contraction department

R1‧‧‧1st leg circumference opening area

G‧‧‧ intersection

R2‧‧‧2nd leg circumference opening area

R‧‧‧Predetermined area

Fig. 1 is a developed plan view of a disposable disposable diaper according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along the line F-F of the development plan view of the disposable disposable diaper according to the first embodiment of the present invention.

3 is an enlarged view of the leg-opening portion 35 of the unfolded plan view of the disposable disposable diaper according to the first embodiment of the present invention.

Fig. 4 is an enlarged view of the leg-opening portion 35 of the unfolded plan view of the disposable disposable diaper according to the first embodiment of the present invention.

Figure 5 is a disposable disposable diaper of the first embodiment of the present invention. Expand the A-A cross-sectional view and the B-B cross-sectional view of the top view.

[Formation for carrying out the invention] (First embodiment of the present invention)

The disposable disposable diaper 10 according to the first embodiment of the present invention will be described with reference to Figs. 1 to 5 .

In the following description of the drawings, the same or similar elements are denoted by the same or similar reference numerals. However, if the drawing is a pattern, it is necessary to pay attention to the case where the ratio of each size is different from the actual one.

Therefore, the specific dimensions and the like must be judged by referring to the following description. Further, even in the drawing planes, portions having different dimensional relationships and ratios are included.

Fig. 1 is a developed plan view of the disposable disposable diaper 10 of the embodiment. Fig. 2 is a cross-sectional view of the disposable disposable diaper 10 taken along the line F-F shown in Fig. 1. In addition, the expanded plan view shown in FIG. 1 is an elongation in which the leg stretch portion 75 and the thigh side flap 80 are extended to a state in which the top sheet 50 and the side flaps 70 of the discarded disposable diaper 10 are not wrinkled. A diagram of the state.

As shown in FIG. 1, the disposable disposable diaper 10 has a front waist region 20, a crotch region 25, and a back waist region 30. Further, the disposable disposable diaper 10 is formed with a pair of leg-opening portions 35.

Here, the front waist region 20 is connected to the wearer's front waistline. The portion to be touched is the portion where the back waist region 30 is in contact with the wearer's back waist circumference, and the underarm region 25 is the portion between the front waist region 20 and the back waist region 30.

Further, in the present embodiment, the direction from the front waist region 20 toward the rear waist region 30 is referred to as the product length direction L, and the direction orthogonal to the product length direction L is referred to as the product width direction W.

The disposable disposable diaper 10 is provided with an absorbent body 40 that extends across the underarm region 25 to the front waist region 20 and the back waist region 30. As shown in Fig. 2, the absorber 40 is constituted by the absorber core 40a and the core cladding 40b.

The absorbent core 40a is similar to the user of the conventional disposable disposable diaper, and the absorbent core 40a can be suitably configured using a known member such as pulverized pulp or a highly absorbent polymer. The absorbent core 40a is wrapped by a sheet-like core cladding 40b.

The core cladding 40b is a sheet covering the absorber core 40a. At least part of the skin surface side of the core clad layer 40b is composed of various liquid non-woven fabrics or tissue sheets having liquid permeability.

For example, in the member constituting the core cladding 40b, a hot air fiber nonwoven fabric having a mass of about 10 to 30 g/m ² , a spunbonded nonwoven fabric, an SMS (spunbond-meltblown-spunbond) nonwoven fabric, and a mass of about 10 to 30 g can be used. /m ² thin paper sheet.

Further, the absorber 40 may have a low-rigidity region 110 in which the base body of the absorber core 40a is lower than the other portions of the absorber 40 or the absorber core 40a does not exist in the back waist region 30. Also, the low rigidity region 110 is also The vicinity of the end portion E1 on the side of the back waist region 30 extending in the longitudinal direction L of the product of the absorbent body 40 can be formed.

For example, the width of the low-rigidity region 110 in the width direction W of the product may be wider toward the end portion E1 on the side of the back waist region 30 of the longitudinal direction L of the product. More specifically, the shape of the low-rigidity region 110 may also be wedge-shaped when viewed from the top of the disposable disposable diaper 10.

In addition, as shown in FIG. 2, the liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40, and the back surface 50 (non-skin contact surface side) of the absorber 40 is provided. The liquid impervious back sheet 60a. Further, as shown in FIG. 2, an exterior sheet 60 (non-woven sheet) may be provided on the back side (non-skin contact surface side) of the back sheet 60a.

The side edges 70 in the product width direction W of the absorber 40 are respectively provided with the side flaps 70. The side flaps 70 are constituted by one or two or more sheets of non-woven fabrics stacked one on another.

Moreover, the disposable disposable diaper 10 is provided with a pair of buckles 90 in the back waist region 30, and the target tape piece 90a is provided in a predetermined region on the non-skin contact surface side of the front waist region 20.

Here, by attaching the buckle 90 to the target strap 90a, the disposable disposable diaper 10 can be held in the wearer's body.

Further, as shown in Fig. 1, the disposable disposable diaper 10 of the present embodiment may include a retractable underarm constriction portion formed in the armpit region 25 in the absorbent body arrangement region in which the absorbent body 40 is disposed. 200a.

Specifically, as shown in FIG. 2, the underarm expansion and contraction portion 200a is also It can be provided between the absorber 40 (core cladding layer 40b) and the back sheet 60a.

Here, the underarm elasticizing portion 200a may be expanded and contracted in the product longitudinal direction L, or may be expanded and contracted in the product width direction W, and may be expanded and contracted in both the product longitudinal direction L and the product width direction W.

Further, the crotch expansion-contraction portion 200a may constitute a center line O of the disposable disposable diaper 10 that extends across the product longitudinal direction L toward the front waist region 20 side and the back waist region 30 side.

In the present embodiment, the crotch expansion-contraction portion 200a may be constituted by a stretchable sheet member.

For example, in such a stretchable sheet, a thermoplastic elastomer resin such as molten urethane or styrene may be used as a film-like stretchable film; a stretchable nonwoven fabric formed of stretchable fibers; The non-stretchable sheet which is broken or weakened is bonded to a stretchable film or a stretched nonwoven fabric.

In addition, a linear or band-shaped elastic member formed of a polyurethane elastic fiber or a natural rubber may be arranged side by side to form a crotch expansion-contraction portion 200a instead of the stretchable sheet member.

In this case, in consideration of the rigidity of the absorbent core 40a and the rigidity of the other member constituting the disposable disposable diaper 10, the thickness of the elastic member to be used and the gap to be disposed may be appropriately selected, but may be discarded after use. When the main body of the disposable diaper 10 is in a natural state (non-stretched state), it is preferable that the entire side edge portion of the absorbent core 40a in the product width direction W is in a contracted state.

Specifically, the expansion ratio of the underarm elastic portion 200a is 1.2 times or more and 1.8 times or less are ideal. For example, in the present embodiment, the expansion ratio of the crotch expansion-contraction portion 200a can be set to 1.4 times.

The expansion ratio refers to the degree of expansion and contraction of the underarm elastic portion 200a in the expansion/contraction direction (in the embodiment, the product longitudinal direction L), and is defined as follows.

The expansion ratio = (the length of the expansion and contraction direction of the underarm expansion and contraction portion 200a in the maximum extension state) / (the length of the expansion and contraction direction of the underarm expansion and contraction portion 200a in the natural state)

Further, in the present specification, such an expansion ratio is, for example, measured as follows.

First, when the disposable disposable diaper 10 is sealed in a package or the like, the disposable disposable diaper 10 is taken out from the package, in such a state, at 20 ° C ± 2 ° C, and the relative humidity is 60% ± 5 Leave in the environment of %RH for 60 minutes.

Secondly, a spring gauge (a tape piece: a polyvinyl chloride coated with glass fiber) manufactured by Affinity Co., Ltd. is used, and the expansion and contraction direction of the desired region in the state (that is, the natural state) is measured along the measurement target portion. The length of the stretched direction of the desired region (that is, the maximum stretch state) when extending from the natural state to the state in which the wrinkles of the elastic member cannot be visually confirmed. Hereinafter, the measurement of "length" in the present specification is performed by the above-described measurement method.

By setting the expansion ratio of the underarm/elastic expansion portion 200a to 1.2 times or more and 1.8 times or less, the stretchability of the wearer's skin can be appropriately followed.

For example, when the wearer adopts a forwardly curved posture such as a front side contraction of the body, the skin on the buttock side of the wearer is elongated by about 30% with respect to the state of stretching the body.

In other words, when the expansion/contraction ratio of the crotch expansion-contraction portion 200a is 1.2 or less, the contraction of the crotch expansion-contraction portion 200a in the natural state is insufficient, and the disposable diaper is used as compared with the case where the underarm constriction portion 200a is not provided. The difference in the ease of bending of 10 is small, and there is no way to stand up in the front waist region 20 at the desired position.

On the other hand, when the expansion ratio of the crotch expansion-contraction part 200a is set to be larger than 1.8 times, since the contraction size of the crotch expansion-contraction part 200a in the contraction direction becomes too large, the area in which the crotch expansion-contraction part 200a exists is easy to become. The disposable disposable diaper 10 is easily offset toward the underside of the wearer in a state of being more closely attached to the body.

In addition, as shown in FIG. 1, the front side of the absorber 40 (the top sheet 50 side) is provided with a pair of leg stretches which are formed along the leg-opening opening 35 and which are expandable and contractable at least in the product longitudinal direction L. Part (leg hem) 75.

The leg stretch portion 75 is longer in the product longitudinal direction L than the underarm elastic portion 200a, and is disposed outside the underarm elastic portion 200a in the product width direction W.

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

Moreover, the leg expansion and contraction portion 75 is the lower armrest expansion and contraction portion 200a and the waist. Similarly to the elasticized portion 100, it may be formed of a stretchable sheet member.

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

Here, when the width of such a stretchable sheet member is less than 5 mm, the effect of substantially forming the surface along the leg circumference of the wearer cannot be exhibited. When the width of such a stretchable sheet member exceeds 35 mm, The area along the leg width is widened, and such a stretchable sheet member is likely to be caught in the body side of the wearer or to be easily warped.

The expansion ratio of the leg stretchable portion 75 is preferably 1.5 to 2.4 times. For example, in the present embodiment, the expansion ratio of the leg stretchable portion 75 can be set to 1.9 times. The expansion ratio of the leg stretchable portion 75 is defined in the same manner as the above-described expansion ratio of the underarm elastic portion 200a.

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

As shown in FIG. 1, the thigh side flap 80 has a joint portion 81 and a free end portion 82 which is disposed on the opposite side of the joint portion 81 and is provided with an elastic member 83.

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

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

The thigh side flap 80 is erected with the joint portion 81 as a base end when worn, and comes into contact with the wearer's skin with the free end portion 82 as a apex portion.

Moreover, as shown in FIG. 1, the disposable disposable diaper 10 of this embodiment is equipped with the pair of hip side elastic members 101 extended toward the longitudinal direction L of a product.

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

In addition, although FIG. 1 shows the case where one hip side elastic member 101 is provided in each side, the present invention is not limited to such an example, and a plurality of hip side elastic members 101 may be applied.

Here, it is preferable that the number of the buttocks side elastic members 101 is one to three on each side.

Further, the distance D1 between the buttocks side elastic member 101 and the outer side of the leg elastic member 75 in the product width direction W is preferably 10 mm or more and 30 mm or less.

When the distance D1 is less than 10 mm, it is difficult to enhance the effect of expanding the crotch region 25 toward the outer side in the product width direction W by the buttocks side elastic member 101.

On the other hand, when such a distance D1 becomes longer than 30 mm, wrinkles generated between the leg elastic member 75 and the buttocks side elastic member 101 are contracted by the leg elastic member 75 and the buttocks side elastic member 101. The effect of the force against the wearer's body is not sufficient, and the gap between the leg elastic member 75 and the buttocks side elastic member 101 and the wearer's body is likely to occur, and the wearer's buttocks cannot be sufficiently covered.

Further, the fineness of the buttocks side elastic member 101 is smaller than 780 dtex and larger than 210 dtex, and the expansion ratio of the buttocks side elastic member 101 can be set to about 1.8 to 2.4 times.

According to such a configuration, the sheet around the buttocks side elastic member 101 is excessively shrunk, and the so-called disposable disposable diaper 10 can be prevented from being worn on the skin contact surface side of the disposable diaper 10 after use. The disposable diaper 10 is placed against the wearer's buttocks after use.

Further, as shown in Fig. 1, in the disposable disposable diaper 10 of the present embodiment, each of the leg-opening portions 35 has a first leg-opening region R1 and a second leg-opening region R2. Here, the second leg-opening region R2 is disposed on the front waist region 20 side more than the first leg-opening region R1.

Further, the buttocks side elastic member 101 is disposed in the first leg circumference opening region R1, and is not disposed in the second leg circumference opening region R2.

That is, as shown in Fig. 1, in the extended state of the disposable disposable diaper 10, the intersection point G of the buttocks side elastic member 101 (or the extension line of the buttocks side elastic member 101) and the leg circumference opening portion 35 becomes A boundary point between the first leg circumference opening region R1 and the second leg circumference opening region R2.

Further, in the extended state of the disposable disposable diaper 10, the lengths of the ends of the first leg-opening region R1 in the product width direction W are different from each other. W1 is the composition that becomes the shortest at the intersection G.

Further, when there are a plurality of buttocks side elastic members 101 on each side, the above-mentioned intersection G and the end of the first leg circumference opening region R1 are defined with respect to the buttocks side elastic member 101 which is the innermost in the product width direction W. unit.

In other words, in the extended state of the disposable disposable diaper 10, the length W1 of the end portions of the first leg-opening region R1 in the product width direction W of the intersection G is higher than the intersection G. The length of the end portions of the first leg-opening region R1 in the product width direction W of the region on the side of the waist region 30 is shorter.

On the other hand, in the extended state of the disposable disposable diaper 10, the length W2 of the end portions 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, in the extended state of the disposable disposable diaper 10, the length W1 of the end portions of the first leg-opening region R1 at the intersection width G of the product in the product width direction W is the width of the product in the predetermined region R. The end portions of the second leg-opening region R2 in the web direction W have a length W2 or more.

In other words, the first leg-surrounding opening region R1 in the product width direction W is a plan view of the disposable disposable diaper 10 as shown in Fig. 3, and is convexly formed with respect to the inner side toward the product width direction W. The first curved line A is formed so as to form a second curved line B having a convex shape on the outer side in the product width direction W.

For example, as shown in FIG. 4, the first curved line A is formed by forming an arcuate convex shape toward the inner side Wi of the product width direction W. The second curve B is formed in a convex shape in which the outer side Wo of the product width direction W is an arc shape.

Further, as shown in Fig. 4, in the extended state of the disposable disposable diaper 10, the wiring of the second curve B of the intersection G and the buttocks side elastic member 101 (or the extension of the buttocks side elastic member 101) are formed. The angle θ can also be configured to be 25° to 35°.

According to such a configuration, when the buttocks-side elastic member 101 is contracted, the line of the end portion of the leg-opening portion 35 has a smooth shape, and the shape of the buttocks of the wearer can be along without any abnormality, and The appearance of the buttocks that can wrap the wearer can be formed.

Moreover, according to such a configuration, it is possible to adhere to the wearer's body by covering a sheet such as a non-woven fabric such as the buttocks of the wearer's buttocks. Therefore, even if the wearer's motion is applied, the wearer can maintain the use. The disposable diaper 10 covers the state of the wearer's buttocks.

Further, as shown in FIG. 1, the buttocks side elastic member 101 may be disposed to overlap the end portion E1 on the side of the back waist region 30 of the leg elastic member 75 and the width of the product at the base end portion of the buckle 90. The line X of the end portion E2 on the inner side of the direction W and on the side of the crotch region 25 side.

As shown in Fig. 5 (a), among the leg elastic members 75, two or more leg elastic members 75 disposed in the vicinity of the absorbent core 40a (absorbent body 40) may be non-stretchable by three or more layers. The sheets (for example, the side flaps 70, the back sheet 60a, and the exterior sheet 60) are held.

On the other hand, as shown in FIG. 5(b), the buttocks side elastic member 101 can also be composed of two layers of non-stretchable sheets (for example, the side flaps 70 and the outside). The loading sheet 60) is held.

Here, as shown in FIG. 1, the region in which the underarm elastic portion 200a is disposed and the region in which the buttocks side elastic member 101 is disposed may be disposed at least partially in the product longitudinal direction L.

According to the disposable disposable diaper 10 of the present embodiment, the buttocks 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 buttocks side elastic member 101 is along the end of the leg circumference opening portion 35. The shape (line) of the portion is contracted so that the end portions of the leg-opening portions 35 of the underarm region 25 and the front waist region 20 are on the side of the back waist region 30 and are more oriented toward the width direction of the disposable disposable diaper 10 The outer Wo of W is drawn closer.

As a result, the wearer's buttocks can be largely covered in the wide direction, and the neck width of the underarm region 25 of the disposable disposable diaper 10 can be prevented, and the squat of the wearer's ventral side can be prevented. The disposable disposable diaper 10 can be suitably attached to the portion.

As described above, the present invention will be described in detail using the above-described embodiments, and it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in the present specification.

Further, in the disposable diaper of the present modification, the leg hem formed by the rope-shaped elastic member may be provided instead of the leg hem formed by the stretchable nonwoven fabric sheet.

The present invention can be carried out without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the description of the present specification is intended to be illustrative, and is not intended to limit the invention.

In addition, the entire contents of Japanese Patent Application No. 2012-104156 (filed on Apr. 27, 2012) are incorporated herein by reference.

[Industrial Availability]

The present invention can provide a disposable disposable diaper which can sufficiently cover the wearer's buttocks and can properly fit the wearer's leg circumference.

10‧‧‧Disposable disposable diapers

20‧‧‧front waist area

25‧‧‧胯下域

30‧‧‧Back waist area

35‧‧‧ leg opening

40‧‧‧ absorber

60a‧‧‧back sheet

70‧‧‧Flanking

75‧‧‧ leg extension

75‧‧‧ Leg elastic members

80‧‧‧Thigh side flap

81‧‧‧ joint part

82‧‧‧Free end section

83‧‧‧Flexible components

90‧‧‧ buckle

90a‧‧‧Target belt

101‧‧‧ Hip side elastic members

110‧‧‧Low rigid area

200a‧‧‧Under the expansion and contraction department

R1‧‧‧1st leg circumference opening area

G‧‧‧ intersection

R2‧‧‧2nd leg circumference opening area

R‧‧‧Predetermined area

A‧‧‧1st curve

B‧‧‧2nd curve

D1‧‧‧ distance

E1‧‧‧ end

E2‧‧‧ end

L‧‧‧Products long direction

O‧‧‧ center line

X‧‧‧ line

W‧‧‧ product wide direction

W1, W2‧‧‧ length

Claims (8)

A disposable disposable diaper having a front waist region, a back waist region, and a crotch region between the front waist region and the rear waist region, forming a pair of leg openings and having An absorbent body extending from the crotch region to the front waist region and the back waist region, further comprising: a product longitudinal direction from the front waist region toward the rear waist region; and a product orthogonal to the longitudinal direction of the product A disposable diaper for wide-width use, characterized in that: a leg elastic member formed along the leg-opening portion and extending from the front waist region to the rear waist region along the crotch region; And a buttocks side elastic member that is disposed on the outer side in the width direction of the product more than the leg elastic member, and each of the leg-opening portions has a first leg in which the hip-side elastic member is disposed. a surrounding opening region; and a second leg-surrounding opening region disposed on the front waist region side of the first leg-surrounding region, the buttocks-side elastic member or the buttock-side elastic member The intersection of the extension line and the leg-opening portion is a boundary between the first leg-opening region and the second leg-opening region, and the end of the first leg-opening region in the product width direction at the intersection The lengths of the respective portions are shorter than the lengths of the end portions of the first leg-opening regions in the product width direction of the region on the side of the back waist region in the region of the rear waist region. The length of the end portions of the second leg-opening region in the width direction of the product is the shortest in the predetermined region, and the ends of the first leg-opening regions in the product width direction at the intersection are mutually The length of the end portion of the second leg-opening region in the wide direction of the product in the predetermined region is equal to or longer than the length of each other. The disposable disposable diaper according to the first aspect of the invention, wherein the first leg circumference opening region is viewed from a plan view of the disposable diaper in a plan view of the disposable diaper The inner side of the convex shape is formed by a second curve formed by forming a convex shape on the outer side in the wide direction of the product. The disposable disposable diaper according to the second aspect of the invention, wherein the second curve is a convex shape that is arcuate outward toward the outer side in the width direction of the product, and the second curved line of the intersection is The angle formed by the extension line of the buttocks side elastic member or the buttocks side elastic member is 25 to 35 degrees. The disposable disposable diaper according to the second or third aspect of the invention, wherein the first curve is a convex shape which is formed in an arc shape toward the inner side in the width direction of the product. The disposable disposable diaper according to any one of claims 1 to 3, wherein the back waist region includes a buckle, and the buttock elastic member is disposed to overlap the leg elastic member The end portion of the aforementioned back waist region side and the base end portion of the aforementioned buckle band The inner side of the product in the width direction is a line of the end portion on the side of the crotch region. The disposable diaper according to any one of claims 1 to 3, wherein the absorbent body has an absorbent core, and the leg elastic members are disposed in the vicinity of the absorbent core. The leg elastic members of the strip or more are held by three or more non-stretch sheets, and the hip elastic members are held by two non-stretch sheets. The disposable disposable diaper according to any one of the first to third aspects of the present invention, wherein the disposable diaper is provided in the absorbent region where the absorbent body is disposed in the crotch region The underarm extension. The disposable diaper according to claim 7, wherein the region in which the underarm elastic portion is disposed and the region in which the hip elastic member is disposed are disposed at least in the longitudinal direction of the product. Some overlap.