TW201716044A - Pant-type disposable diaper - Google Patents

Abstract

The present invention is a pant-type disposable diaper having mutually orthogonal vertical direction, transverse direction and front-to-back direction and having an abdominal section, a back section, a waist-encircling opening and a pair of leg-encircling openings. The abdominal section and the back section are stretchable in the transverse direction. The abdominal section and the back section overlap each other in the front-to-back direction. At the respective edges in the transverse direction, the abdominal section and the back section are connected. The upper edge of the abdominal section that forms the waist-encircling opening and/or the upper edge of the back section that forms the waist-encircling opening has a single downward-extending cut section located to the inside of the respective edges in the transverse direction. When viewing the diaper in the front-to-back direction, the entire lengths of both the upper edge of the abdominal section and the upper edge of the back section are located below or on an imaginary line drawn between the upper ends of the respective edges in the transverse direction.

Description

Shorts type disposable diapers

The present invention relates to a disposable diaper for a shorts type.

Conventionally, a disposable disposable diaper 1' has been used. As shown in Fig. 1, the disposable diaper 1' has an up-and-down direction, a lateral direction, and a front-rear direction orthogonal to each other. Further, the diaper 1' has a ventral portion 30' on the front side of the wearer, a back side portion 40' on the rear side of the wearer, and a crotch portion 20' located under the armpit of the wearer. Further, the end portions 1ew' and 1ew' in the lateral direction are continuous with the front side portion 30' and the back side portion 40', whereby the opening BH' is formed above. Further, in the lower portion, the front side portion 30' and the back side portion 40' are continuous through the crotch portion 20', whereby a pair of leg-opening openings LH' and LH' are formed on both sides in the lateral direction of the crotch portion 20'. Further, in the front side portion 30' and the back side portion 40', the elastic members 35' and 45' such as rubber threads are provided with stretchability in the lateral direction.

Here, in Patent Document 1, as an example of the disposable diaper 1' for the pants type, as shown in Fig. 1, the disposable diaper 1' is disclosed, and the upper edge portion 40BH' of the back side portion 40' is compared. The upper ends of the respective end portions 1ew' and 1ew' in the lateral direction protrude upward. That is, the back side 40' has There is a protruding portion 40up' which protrudes upward from the upper ends of the respective end portions 1ew' and 1ew' in the lateral direction. Further, the protruding portion 40up' is also provided with an elastic member 45up', thereby imparting stretchability in the lateral direction.

On the other hand, when the wearer wears the disposable diaper 1', the hand is placed at each of the end portions 1ew', 1ew', etc. in the lateral direction, and the hand is applied to the two sides of the same diaper 1' in the lateral direction. The force is thereby caused to form a state in which the opening BH' is expanded in the lateral direction.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2012-192115

However, in the disposable diaper 1' of the above-mentioned respective end portions 1ew' and 1ew' in the lateral direction, the paper diaper 1' is not easily conveyed to the protruding portion 40up' of the disposable diaper 1'. The protruding portion 40up' is stretched in the lateral direction, and as a result, it is considered that the entire opening BH' of the disposable diaper 1' is not easily expanded.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to easily spread the diaper of the disposable diaper of the pants-type disposable diaper in the lateral direction.

In order to achieve the above-mentioned main object, the present invention is a pants-type disposable disposable diaper having an up-and-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having a front side portion, a back side portion, a circumference opening, and a The leg-opening is characterized in that the front side portion and the back side portion have the above-described lateral direction stretchability, and the front side portion and the back side portion are overlapped in the front-rear direction, and the end portions in the lateral direction are The front side portion and the back side portion are connected to each other, and the upper edge portion of the front side opening portion and the upper side portion of the back side portion which is the upper edge portion of the opening portion The portion having the inner side in the lateral direction of each of the end portions has only one slit portion extending downward, and when the paper diaper is viewed from the front-rear direction, the upper edge portion of the front side portion and the aforementioned Each of the upper edge portions of the back side portion is located at a position lower than a virtual straight line connecting the upper ends of the respective end portions or the virtual straight line in the lateral direction.

Other features of the present invention will become apparent from the description and appended claims.

According to the present invention, the opening of the disposable diaper for the pants-type disposable diaper can be easily expanded in the lateral direction to make the disposable diaper easy to put on.

1‧‧‧Pants disposable disposable diapers

1ew, 10ea, 10eb‧‧‧ end

1ewu‧‧‧ upper end

10‧‧‧Absorbing subjects

10p1, 10p2, 10p3, 10LG‧‧‧ parts

10eu‧‧‧top

11‧‧‧Acceptor

11c‧‧‧Absorbent core

11ceu‧‧‧top

13‧‧‧Top sheet

15‧‧‧Back sheet

15a‧‧‧ leakproof sheet

15b‧‧‧Outer sheet

16‧‧‧Flexible components

17‧‧‧ leg side wrinkle sheet

17LSG‧‧‧Part

18‧‧‧Flexible components

20‧‧‧ Lower part

30‧‧‧ ventral side

31‧‧‧ Ventral belt members

31BH‧‧‧Upper Edge

31BHPB, 31BHS‧‧‧ Section

31e, 31eL‧‧‧ end

32, 33‧‧‧ Non-woven

35, 35a, 35b, 35c, 35d‧‧‧ elastic members

37‧‧ ‧ notch (cut, recess)

37ed‧‧‧Bottom

37eu‧‧‧ upper end

37ip‧‧‧The part containing the notch (the part containing the notch)

37s‧‧‧Gap section (cut section)

37sc‧‧‧corner section

40‧‧‧ Back side

41‧‧‧Back side belt members

41BH‧‧‧Upper edge

41eL‧‧‧ end

42, 43‧‧‧ Non-woven

45‧‧‧Flexible components

47‧‧ ‧ notch (cut section)

51‧‧‧With components

51f‧‧‧return part

Section 51c‧‧‧

51bn‧‧‧Folding Department

A1‧‧‧1st area

A1a‧‧‧established area

A1aew‧‧‧ both ends

A2‧‧‧2nd area

A10‧‧‧ position

A37‧‧‧Scope

A37ip‧‧‧Different color areas

BH‧‧‧胴opening

LH‧‧‧ leg opening

CL1‧‧‧Central location

CL10‧‧‧Location

Lu‧‧‧imaginary straight line

LG‧‧‧ leg wrinkles

LSG‧‧‧ leg side wrinkles

LB37sc‧‧‧ fold line

Both ends of P10w, P11cw‧‧

F‧‧‧Stretching force

Fig. 1 is a schematic perspective view showing an example of a disposable diaper 1' for a pants type.

2 is a schematic perspective view of the three-piece disposable diaper 1 of an example of the disposable disposable diaper 1 of the present embodiment, which is viewed from the ventral side.

Fig. 3A is a schematic plan view of the disposable diaper 1 as seen from the skin side.

Fig. 3B is a cross-sectional view taken along line B-B of Fig. 3A.

Fig. 4A is a schematic plan view of the disposable diaper 1 of the present embodiment as seen from the ventral side.

4B is a schematic plan view of the disposable diaper 1 in a state in which the upper edge portion 31BH has two or more notch portions 37 and 37.

5A is a schematic perspective view of a disposable diaper 1 in a state in which the back side belt member 41 is provided with a notch portion 37 instead of the front side belt member 31, and FIG. 5B is attached to the front side belt member 31 and the back side belt member 41. A schematic perspective view of the disposable diaper 1 in the case of each of the notched portions 37 and 37 is provided.

Fig. 6A is a schematic enlarged view of the abdominal side belt member 31 of the disposable diaper 1 in the pants-type state as seen from the front side.

FIG. 6B is a schematic enlarged view showing an example in which the position of the notch portion 37 in the lateral direction is located in a predetermined region A1a which does not substantially have the contraction force by the elastic member 35d (35).

Fig. 7 is an explanatory view showing a modification of the disposable diaper 1 for a pants type.

8A and 8B are schematic plan views showing an example in which the entire upper edge portions 31BH and 41BH of the front side belt member 31 and the back side belt member 41 are located below the imaginary straight line Lu.

FIG. 9 is a schematic perspective view showing an example in which the end portions 1ew and 1ew of the disposable diaper 1 are formed in the form of the bent portion 51bn by the folding of the belt members 51 on both sides in the lateral direction.

According to the description of the specification and the drawings, at least the following matters can be clarified.

A pants-type disposable disposable diaper having an up-and-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having a front side portion, a back side portion, a circumference opening, and a pair of leg circumference openings, wherein: The front side portion and the back side portion have the stretchability in the lateral direction, and the front side portion and the back side portion are overlapped in the front-rear direction, and the front side portion and the back side portion are formed at each end portion in the lateral direction. The upper edge portion of the front side portion that is the opening of the opening and the upper edge portion of the back side portion that is at least one of the upper edge portions of the opening of the weir is further higher than each of the end portions. The inner side of the lateral direction has only one notch portion extending downward, and when the disposable diaper is viewed from the front-rear direction, the ventral portion is Each of the upper edge portion and the upper edge portion of the back side portion is located at a position lower than a virtual straight line connecting the upper ends of the end portions or the virtual straight line in the lateral direction.

According to the pants-type disposable disposable diaper, the front side portion and the back side portion do not have portions that protrude upward from the respective end portions in the lateral direction. Therefore, when the hand is placed at each end portion or the like to expand in the lateral direction, the tensile force in the lateral direction to which the respective end portions are applied is quickly transmitted to the upper edge portions of the abdominal portion and the back side portion. Each of the upper edge portions extends in the lateral direction. Moreover, by this, the opening of the rim can be smoothly expanded in the lateral direction, and as a result, it is easier to put on the disposable diaper.

Further, the disposable diaper has a notched portion at the upper edge portion. Therefore, if the disposable diaper is expanded in the lateral direction, the slit portion is opened in the lateral direction, so that the opening of the opening can be expanded more largely only by the opening portion, and as a result, the disposable diaper can be more easily worn.

Further, the notch portion is provided only at one of the upper edge portions. Therefore, it is possible to prevent a problem that occurs when the upper edge portion is provided with two or more slit portions, that is, it is possible to prevent the tensile force from being easily transmitted to the portion between the slit portions in the upper edge portion. In this way, the tensile force applied to each end portion in the lateral direction can be transmitted over substantially the entire length of the upper edge portion in the lateral direction, and as a result, the opening of the circumference can be more smoothly expanded.

Preferably, the pants-type disposable disposable diaper has a member having the slit portion among the front side portion and the back side portion, and a plurality of elastic members are arranged side by side in the vertical direction. The aforementioned lateral direction and for imparting the aforementioned expansion and contraction to the member At least one of the plurality of elastic members is discontinuous in the lateral direction of the slit portion, and the position of the discontinuous elastic member in the vertical direction is located The range of the vertical direction in which the notched portion is located.

According to the pants-type disposable disposable diaper, the position of the at least one elastic member in the lateral direction of the slit portion is discontinuous. Therefore, when the member is extended in the lateral direction, the required stretching force can be reduced, whereby the opening of the opening can be easily expanded in the lateral direction.

In the pants-type disposable disposable diaper, it is preferable that the discontinuous elastic member is continuous in the lateral direction from the slit portion to the end portion.

According to the pants-type disposable disposable diaper, the discontinuous elastic member is continuous in the lateral direction from the slit portion to the end portion. Therefore, it is possible to impart stretchability to the surrounding opening in a wide range in the lateral direction of the opening.

Preferably, the pants-type disposable disposable diaper has an absorbent main body that absorbs excrement, and an upper end of the absorbent main body is located below the lower end of the slit portion.

According to such a pants-type disposable disposable diaper, a notched portion is not formed in the absorbent body. Therefore, the total amount of the members constituting the slit portion can be reduced, whereby the rigidity of the slit portion can be reduced as a whole to be soft. Moreover, the result is that the incision can make contact with the wearer's skin. Good shape.

Preferably, the pants-type disposable disposable diaper has a member having the slit portion among the front side portion and the back side portion, and a plurality of elastic members are arranged side by side in the vertical direction. In the lateral direction and for imparting the stretchability to the member, at least one of the plurality of elastic members is at a position between the lower end of the cutout portion and the upper end of the absorbent body. The lateral direction extends across the position of the slit portion in the lateral direction.

According to the pants-type disposable disposable diaper, the elastic member extending across the position of the slit portion in the lateral direction can prevent the upper end of the absorbent body located beside the slit portion from being oriented in the lateral direction with the slit portion The state of being separated from the wearer's skin. Moreover, as a result, the absorbent body can achieve good conformability to the wearer's skin at the upper end and its side.

Preferably, the absorbent short-type disposable diaper has a liquid absorbing absorbent core, and an upper end of the absorbent core is located below the upper end of the absorbent body. At least one of the plurality of elastic members at a position between the upper end of the absorbent body and the upper end of the absorbent core is a slit portion that straddles the lateral direction in the lateral direction Extended by location.

According to the pants type disposable diaper, the elastic member extending across the slit portion in the lateral direction can prevent the upper end of the absorbent core located beside the slit portion from being oriented in the lateral direction with the slit portion The situation that opens and detaches from the wearer's skin. Moreover, as a result, the absorbent core can achieve good conformability to the wearer's skin at the upper end and its side.

Preferably, the absorbent disposable main diaper is located in a central portion of the disposable diaper in the lateral direction, and the arrangement position of the slit portion in the lateral direction is higher than the absorbent property. Both ends of the main body in the lateral direction are located on the inner side.

According to the pants-type disposable disposable diaper, the notched portion is located on the center side of the end side in the lateral direction of the disposable diaper. Therefore, it is possible to prevent the hand placed at each end portion of the paper diaper in the lateral direction from being caught in the notch portion in order to expand the opening of the crotch, thereby preventing the incision portion from being opened in the lateral direction. Moreover, by this, the slit portion can be surely opened, with the result that the opening of the opening is effectively assisted.

Preferably, the pants-type disposable disposable diaper has a member having the slit portion among the front side portion and the back side portion, and a plurality of elastic members are arranged side by side in the vertical direction. The absorbent body having the absorbent body which absorbs the excretion in the lateral direction and for imparting the aforementioned stretchability to the member, and the absorbent body has a liquid absorbing absorbent core. The member includes: a first region where the absorbent core is located; and a second region located on both sides of the first region in the lateral direction and not provided with the absorbent core, wherein the elastic member provides at least the first region The magnitude of the contraction force in the lateral direction of the predetermined region is smaller than the magnitude of the contraction force in the lateral direction of the second region to which the elastic member is applied, and at least a part of the position of the notch portion in the lateral direction is a position The inner side is longer than the both ends of the predetermined area in the lateral direction.

According to the pants-type disposable disposable diaper, at least a part of the arrangement position of the notch portion is located inside the both ends in the lateral direction of the predetermined region, and the contraction force of the predetermined region is large. It is small, so the cutout portion is easily opened in the lateral direction. Therefore, the tensile force in the lateral direction given by the hand placed at each end portion in the lateral direction acts on the notch portion quickly, whereby the notch portion can be quickly opened in the lateral direction.

In the pants-type disposable disposable diaper, it is preferable that the arrangement position of the slit portions in the lateral direction is located inside the both ends in the lateral direction of the predetermined region.

According to the pants-type disposable disposable diaper, the arrangement position of the notch portions is located on the inner side of the both ends in the lateral direction of the predetermined region. Here, since the contraction force of the predetermined region is small, the slit is small. The section is easy to open in the horizontal direction. Therefore, the tensile force in the lateral direction given by the hand placed at each end portion in the lateral direction acts on the notch portion quickly, whereby the notch portion can be quickly opened in the lateral direction.

In the pants-type disposable disposable diaper, it is preferable that the cutout portion is provided in the front side portion.

According to the pants-type disposable disposable diaper, since the notch portion is provided in the front side portion, the opening of the incision portion in the lateral direction can reduce the restraint of the abdomen portion. Moreover, it is more comfortable for the abdomen.

In the pants-type disposable disposable diaper, it is preferable that the cutout portion is located at a central portion of the disposable diaper in the lateral direction.

According to such a pants-type disposable disposable diaper, since the slit portion is formed at the center portion, it is equally opened in the lateral direction. Further, the transferability of the tensile force at the upper edge portion is also substantially equal to each other on both sides of the notched portion. Therefore, the opening of the circumference is easy to expand.

In the pants-type disposable disposable diaper, it is preferable that the cutout portion is a recess recessed downward.

According to the disposable short-type disposable diaper, since the notched portion is a concave portion, it is possible to prevent the corner portion of the both sides in the lateral direction of the upper end of the notched portion from being formed into a triangular shape when the notched portion is in the slit shape. Discounted.

In the pants-type disposable disposable diaper, it is preferable that the notch portion is a concave portion that is located at a central portion of the front side portion in the lateral direction and that is recessed downward.

According to the pants-type disposable disposable diaper, since the slit portion is formed at the central portion in the lateral direction of the abdominal portion, the disposable diaper can be prevented from hitting the navel of the wearer. Therefore, when it is not desired that the disposable diaper hits the wearer's navel, for example, when the belly of the newborn is wet, or if the navel is installed for bleeding prevention, When the jig is used, it is a suitable paper diaper.

In the pants-type disposable disposable diaper, it is preferable that the cutout portion is provided in each of the front side portion and the back side portion.

According to the pants-type disposable disposable diaper, since both the front side portion and the back side portion have the notched portions that can be opened when the tensile force is applied to both sides in the lateral direction, the opening of the circumference is further increased. Easy to expand.

Further, the incision portion is provided in each of the abdominal side portion and the back side portion. Therefore, it is possible to prevent a problem caused when at least one of the upper edge portions is provided with two or more slit portions, that is, a problem that the tensile force is not easily transmitted to the portion between the slit portions of the upper edge portion. . In addition, the tensile force applied to each end portion in the lateral direction can be transmitted to the upper end portions of the abdominal portion and the back side portion in substantially the entire length in the lateral direction, and as a result, the tensile force can be transmitted. The surrounding opening expands more smoothly.

In the pants-type disposable disposable diaper, it is preferable that the upper edge portion is formed linearly from the end portion to the upper end of the slit portion.

According to the pants-type disposable disposable diaper, the upper edge portion is formed linearly from the end portion in the lateral direction to the upper end of the slit portion, so that the tensile force imparted to the end portion is easily transmitted to the upper edge portion. The approximate whole area. Further, it is possible to effectively prevent the opening of the dam opening while preventing the bending or the like occurring in the portion where the tensile force is not transmitted.

Preferably, the pants-type disposable disposable diaper has the concave portion among the front side portion and the back side portion. The member has a portion including the notch portion including the notch portion, and the portion including the notch portion has a different color region different from the surrounding color along the edge portion of the notch portion.

According to the pants-type disposable disposable diaper, it is easy to visually confirm the opening state of the slit portion. Moreover, it is easy to grasp the expansion of the opening of the rim.

It is preferable that the disposable diaper of the shorts type is defined as a paper size in the horizontal direction of the upper edge portion in a state in which the stretchability is not required, and an external force is not applied to the paper. In the diaper, the state in which the diaper is contracted by the stretchability is defined as a natural state. In this case, when the paper diaper in the natural state is stretched on both sides in the lateral direction in the lateral direction. The aforementioned lateral dimension of the upper edge portion having the cutout portion is larger than the paper size.

According to the disposable diaper of the pants type, when the diaper of the natural state is stretched on both sides of the end portions in the lateral direction, the lateral direction of the upper edge portion is changed by the opening of the slit portion in the lateral direction. Larger than paper size. Therefore, the opening of the rim can be greatly expanded in the lateral direction and the diaper can be easily put on.

===This embodiment ===

2 is a schematic perspective view of the three-piece disposable diaper 1 of an example of the disposable disposable diaper 1 of the present embodiment, which is viewed from the ventral side. Fig. 3A is a schematic plan view of the disposable diaper 1 as seen from the skin side. Figure 3B Figure 3A is a cross-sectional view taken along line B-B.

In the pants-type state of FIG. 2, the disposable diaper 1 has three directions orthogonal to each other in the up-down direction, the horizontal direction, and the front-back direction. In the pants-type state, the upper side and the lower side in the up-and-down direction are also referred to as "opening side" and "underarm side", respectively, and the front side and the back side in the front-rear direction are also referred to as "abdominal". Side" and "back side".

On the other hand, in the unfolded state of FIGS. 3A and 3B, the disposable diaper 1 has the longitudinal direction, the horizontal direction, and the thickness direction of the three directions orthogonal to each other. In the expanded state, the one side and the other side in the longitudinal direction are also referred to as "ventral side" and "back side", respectively, and one side and the other side in the thickness direction are referred to as "skin side". And "non-skin side".

Meanwhile, the lateral direction means that they are identical to each other in the pants type state and the unfolded state. On the other hand, the longitudinal direction of the unfolded state is along the up-and-down direction of the pants-type state, and the thickness direction of the unfolded state is along the front-rear direction of the pants-type state.

The disposable diaper 1 is a so-called three-piece type. Therefore, in the unfolded state of FIG. 3A, the absorbent main body 10 having the absorbent material as the first fitting has the abdominal belt member 31 as the second fitting, and has the third portion. The back side strap member 41 of the accessory. Specifically, the front side belt member 31 and the back side belt member 41 are parallel to each other in the longitudinal direction with an interval therebetween, and the absorbent main body 10 straddles between the two 31, 41 and the same absorbent body. Each of the end portions 10ea and 10eb in the longitudinal direction of 10 is joined and fixed to the adjacent belt members 31 and 41, respectively, and its outer shape is formed into a substantially H-shape in plan view.

In the expanded state of the substantially H-shape, the predetermined position CL10 in the longitudinal direction of the absorbent body 10 (corresponding to the position of the center position CL1 of the disposable diaper 1 in the longitudinal direction) is used as the bending position, and the same absorbent main body is used. In the folded-back state, the mutually opposing belt members 31 and 41 are joined by the respective end portions 31e and 41e in the lateral direction by welding or the like, and the belt members 31 and 41 are connected to each other. In this manner, the disposable diaper 1 in which the crotch opening BH and the pair of leg openings LH and LH are formed as shown in FIG. 2 is formed. In other words, when the end portions 31e and 41e are joined to each other to form the end portion 1ew of the disposable diaper 1 in the lateral direction, the front side belt member 31 and the back side belt member 41 are in a continuous state. Thereby, a winding opening BH is formed above, and a pair of leg-opening openings LH and LH are formed below.

Further, in the pants-type state (Fig. 2), the disposable diaper 1 can be designed to be divided into three portions 20, 30, 40 in units different from the above-described three fittings 10, 31, and 41. That is, the paper-diaper 1 can be divided into a ventral portion 30 on the front side of the wearer, a back side portion 40 on the rear side of the wearer, and three portions of the crotch portion 20 on the underarm of the wearer. . Further, in this example, as shown in FIG. 3A, the ventral side portion 30 of the former has a ventral side belt member 31 and a portion 10p1 overlapping the abdominal side belt member 31 among the absorbent main bodies 10, and the crotch portion 20 has an absorbent main body. The front side belt member 31 and the portion 10p3 protruding in the longitudinal direction from the back side belt member 41 have the back side belt member 41 and the back side belt member 41 overlapped with the back side belt member 41. Part 10p2.

And, any of the following for the unfolded state and the shorts type In the case where the contraction force by the elastic members 16, 18, 35, and 45 which will be described later is not provided to impart flexibility to the disposable diaper 1, the state in which the disposable diaper 1 is spread is referred to as a "paper type state". Further, a state in which the external force does not act on the disposable diaper 1, that is, the state in which the same diaper 1 is contracted by the contraction force of the elastic members 16, 18, 35, 45 is referred to as a "natural state". Meanwhile, in FIGS. 3A and 3B, the disposable diaper 1 is displayed in a paper state.

In the unfolded state of FIGS. 3A and 3B, the absorptive main body 10 is formed in a substantially rectangular shape in plan view. Further, the longitudinal direction of the absorbent body 10 is arranged along the longitudinal direction. Further, the absorbent main body 10 includes an absorbent body 11 , a top sheet 13 that is provided to cover the same absorbent body 11 from the skin side, and a rear sheet 15 that is provided to cover the same absorbent body 11 from the skin side.

The absorber 11 has a liquid-absorbent absorbent core 11c and a core-sheet sheet (not shown) that covers the outer peripheral surface of the core 11c. The absorptive core 11c is a molded body in which a predetermined liquid absorbing material is formed into a plan view and a substantially hourglass shape, and is an example of a predetermined shape. The liquid absorbing material such as a liquid absorbing fiber such as pulp fibers or a highly absorbent polymer (so-called SAP) can be exemplified. Further, as the core-coated sheet, a liquid-permeable sheet such as a thin paper or a non-woven fabric may be used, but a core-coated sheet may not be provided. Further, the shape of the absorptive core 11c is not limited to the above-described plan view of a substantially hourglass shape, and other shapes are also possible.

The top sheet 13 is a liquid permeable sheet such as a nonwoven fabric having a planar size that protrudes from the absorber 11 in the longitudinal direction and the lateral direction. And the back The sheet 15 is also a sheet having a planar size that protrudes in the longitudinal direction and the lateral direction from the absorbent body 11. As an example, a laminated sheet 15 having a two-layer structure including a polyethylene film, a polypropylene film, or the like is exemplified. The liquid-impermeable leakage preventing sheet 15a and the nonwoven fabric-made exterior sheet 15b which is bonded to the non-skin side of the leakage preventing sheet 15a (FIG. 3B). Further, in a state in which the absorber 11 is interposed between the top sheet 13 and the back sheet 15, the portion protruding from the absorber 11 in the longitudinal direction and the lateral direction is joined by, for example, joining or welding into a frame shape. The two sheets 13, 15 are alternated with each other, whereby the absorbent body 10 is formed. Further, the rear sheet 15 may have only the outer sheet 15b and only the leakage preventing sheet 15a.

Further, as in the example of FIG. 3A, each of the portions 10LG on the outer side in the lateral direction of the absorber 11 of the absorbent body 10 may be provided with leg gathers LG that expand and contract in the longitudinal direction. This leg gather LG constitutes a part of the leg circumference opening LH. In addition, the elastic member 16 such as a rubber thread is fixed in a state in which the elastic members 16 such as rubber threads are extended in the longitudinal direction in the vertical direction. In other words, the elastic member 16 applies a contraction force in the longitudinal direction to each of the portions 10LG, whereby the respective portions 10LG are contracted in the longitudinal direction while forming a plurality of pleats in a natural state in which the external force does not act. Therefore, the leg gathers LG are given the pleats to extend to the final stretchability.

Further, as in the example of FIG. 3, a pair of leg side wrinkles LSG and LSG may be provided at a position on the inner side in the lateral direction of the leg gathers LG. The leg side wrinkle LSG is also called a three-dimensional wrinkle, and is erected from the skin side of the top sheet 13 in order to prevent leakage of the excrement in the lateral direction. that is, A leg-side crease sheet 17 made of non-woven fabric is superposed on the skin side of the top sheet 13, and a part (not shown) of the sheet 17 is fixed to the top sheet 13, whereby the same sheet 17 is made more horizontal than the portion. The inner portion of the direction, 17LSG, is erected. At the same time, the erection of the inner portion 17LSG is realized by the inner portion 17LSG, and the elastic member 18 such as the rubber thread is fixed in the longitudinal direction and extended in the longitudinal direction. In other words, the elastic member 18 imparts a contraction force in the longitudinal direction to the inner portion 17LSG, whereby the inner portion 17LSG is contracted in the longitudinal direction while forming a plurality of pleats, and as a result, the skin side from the top sheet 13 is formed. Rise up.

As shown in FIG. 3A, the front side belt member 31 is a sheet member having a substantially rectangular shape as a material of a soft sheet such as a non-woven fabric. In this example, as shown in FIG. 3B, the non-woven fabrics 32 and 33 are joined to each other to form the abdominal side belt member 31. In addition, as shown in FIG. 3A and FIG. 3B, the central portion of the front side belt member 31 in the lateral direction is overlapped and joined to the longitudinal end portion 10ea of the absorbent body 10 in the longitudinal direction from the non-skin side. Further, the longitudinal end portion 31eL (FIG. 3A) of the portion of the front side belt member 31 that protrudes in the lateral direction from the absorbent main body 10 constitutes a part of the leg circumference opening LH.

Further, as shown in FIG. 3A and FIG. 3B, a plurality of elastic members 35, 35 such as rubber threads in the lateral direction are inserted in the longitudinal direction between the two nonwoven fabrics 32, 33 of the front side belt member 31. And the same non-woven fabrics 32, 33 are joined and fixed in the lateral direction under the extension. Further, the front side belt member 31 is thereby given a contraction force in the lateral direction. Ventral belt The member 31 is provided with stretchability in the lateral direction. In this example, as shown in FIG. 3A, the abdominal belt member 31 has a portion (for example, a central portion in the lateral direction) of the portion overlapping the absorbent body 11 for the purpose of preventing wrinkles from being formed on the absorbent body 11. Since the member 35 is discontinuous, the stretchability is not imparted to the portion, but it is not limited thereto. In this example, the elastic member 35 at the same position as the position in the longitudinal direction of the notch portion 37 to be described later is not continuous at the position of the notch portion 37. Further, the elastic member 35 will be described later.

As shown in FIG. 3A, the back side belt member 41 is a sheet member having a substantially rectangular shape as a material of a soft sheet such as a non-woven fabric. In this example, as shown in FIG. 3B, the back side belt members 41 are formed by joining the two sheets of the nonwoven fabrics 42, 43 in an overlapping manner. In addition, as shown in FIG. 3A and FIG. 3B, the central portion of the back side belt member 41 in the lateral direction is overlapped and joined to the rear end portion 10eb of the absorbent body 10 in the longitudinal direction from the non-skin side. Further, the longitudinal end portion 41eL (FIG. 3A) of the portion of the back side belt member 41 that protrudes in the lateral direction from the absorbent main body 10 constitutes a part of the leg circumference opening LH.

Further, as shown in FIG. 3A and FIG. 3B, a plurality of elastic members 45, 45 such as rubber threads in the lateral direction are inserted in parallel in the longitudinal direction between the two nonwoven fabrics 42, 43 of the back side belt member 41. And the same non-woven fabrics 42, 43 are joined and fixed in the lateral direction under the extension. Further, the back side belt member 41 is thereby given a contraction force in the lateral direction. That is, the back side belt member 41 is imparted with stretchability in the lateral direction. Further, in this example, as shown in FIG. 3A, in the back side belt member 41, one of the portions overlapping the absorbent body 11 In the portion (for example, the central portion in the lateral direction), the elastic member 35 is discontinuous for the purpose of preventing wrinkles from being formed in the absorbent body 11. Therefore, the stretchability is not provided to the portion, but the present invention is not limited thereto.

Although the main components 10, 31, and 41 of the disposable diaper 1 are described above, in the present embodiment, when the disposable diaper 1 is put on the wearer, the opening opening BH of the disposable diaper 1 is easily expanded in the lateral direction. It took a while. The following describes this work.

Fig. 4A is a schematic plan view of the disposable diaper 1 of the present embodiment as seen from the ventral side.

In the present embodiment, when the disposable diaper 1 in the pants-type state and the natural state (or paper-type state) is viewed from the front-rear direction, the upper edge portion 31BH of the abdominal belt member 31 belonging to the abdominal portion 30 and the back side are The upper edge portion 41BH of the back side belt member 41 of the portion 40 is located at a position lower than the virtual straight line Lu of the upper ends 1ewu and 1ewu connecting the end portions 1ew and 1ew, or an imaginary straight line in the entire length in the lateral direction. Lu. Specifically, in the example of FIG. 4A, the upper edge portion 31BH of the front side belt member 31 is located below the imaginary line Lu at the position of the notch portion 37, and is located at an imaginary straight line at a position other than the notch portion 37. On Lu, the upper edge portion 41BH of the back side belt member 41 is the entire length in the lateral direction and is located on the imaginary straight line Lu. Further, the front side belt member 31 and the back side belt member 41 do not have protruding portions that protrude upward from the upper ends 1ewu and 1ewu of the respective end portions 1ew and 1ew in the lateral direction (see the protruding portion 40up' of Fig. 1).

Therefore, when the hand is placed at each of the end portions 1ew, 1ew, etc. to expand in the lateral direction, the end portions 1ew and 1ew are stretched in the lateral direction. The force F is quickly transmitted to the upper edge portions 31BH and 41BH of the front side belt member 31 and the back side belt member 41, and the upper edge portions 31BH and 41BH are extended in the lateral direction. Further, by this, the rim opening BH can be smoothly expanded in the lateral direction, and as a result, the disposable diaper 1 can be easily put on.

Further, the upper edge portion 31BH of the front side belt member 31 has a notch portion 37 (corresponding to a concave portion) as an example of the notched portion, and the notched portion 37 is cut to be recessed downward from the surrounding portion. In other words, the upper edge portion 31BH has a notch portion 37 that extends downward at a position on the inner side in the lateral direction of each of the end portions 1ew and 1ew.

Therefore, when the disposable diaper 1 is expanded in the lateral direction, the notch portion 37 is opened in the lateral direction, so that the opening portion BH can be expanded only by the opening portion thereof. In other words, in the case where the lateral dimension L31BH of the upper edge portion 31BH of the front side belt member 31 in the paper-type state is defined as the paper size L31BH K (FIG. 3A), the pants-type state and the natural state of FIG. 4A are used. When the diaper 1 is stretched on both sides of the end portions 1ew and 1ew in the lateral direction, the dimension L31BH in the lateral direction of the upper edge portion 31BH of the front side belt member 31 is opened by the lateral direction of the notch portion 37. The above paper size 31BH K is larger. Therefore, the rim opening BH can be greatly expanded in the lateral direction, and the disposable diaper 1 can be easily put on.

Further, the notch portion 37 is provided only for the upper edge portion 31BH of the front side belt member 31. Therefore, it is possible to prevent the problem in the case where the reference example of Fig. 4B is provided with the two or more notch portions 37, 37 in the upper edge portion 31BH of the front side belt member 31, that is, the tensile force F is not easily transmitted to the upper portion. a portion between the notches 37, 37 of the edge portion 31BH 31BHPB's bad situation. In addition, the tensile force F that is applied to each of the end portions 1ew and 1ew in the lateral direction can be rapidly transmitted over substantially the entire length of the upper edge portion 31BH in the lateral direction, and as a result, the opening BH can be made more smoothly. expansion.

Further, as shown in FIG. 4A, the notch portion 37 is located at the central portion of the front side belt member 31 in the lateral direction. Therefore, the notch portion 37 is equally opened in the lateral direction. In addition, the transferability of the tensile force F in the upper edge portion 31BH is also substantially equal to each other on the both sides 31BHS and 31BHS on both sides of the notch portion 37 in the upper edge portion 31BH. Moreover, this matter can also effectively improve the ease of expansion of the opening BH. However, it is not limited to this at all. In other words, the notch portion 37 may be formed at a position shifted from the center portion in the lateral direction.

Further, in the example of FIG. 4A, the notch portion 37 is formed in a shape curved in an arc shape in a paper state. Further, in the paper-like state, the maximum value L37d of the dimension of the notch portion 37 in the longitudinal direction is, for example, selected from the range of 10 mm to 30 mm, and this example is 15 mm, and the maximum value L37w of the lateral dimension of the same notch portion 37 is, for example, selected from 50 mm to 100 mm. The range, this example is 85mm. However, the shape of the notch portion 37 is not limited to an arc shape at all. For example, a rectangular shape or a triangular shape may be used, and a polygonal shape other than these may be used. Moreover, the composite shape of the combination curve and the straight line is also possible.

Further, in the example of FIG. 4A, the upper edge portion 41BH of the back side belt member 41 belonging to the back side portion 40 is not provided with the notch portion 47, but is not limited thereto. For example, the notch portion 37 of the front side belt member 31 is replaced as in FIG. 5A, and the notch portion 47 may be provided on the back side belt member 41, or As shown in FIG. 5B, in addition to the notch portion 37 of the front side belt member 31, a notch portion 47 may be provided in the back side belt member 41. In this case, for the same reason as described above, as shown in FIG. 5A and FIG. 5B, it is desirable to provide only one notch portion 47 in the upper edge portion 41BH of the back side belt member 41. Further, it is assumed that the notch portion 37 (47) is provided only in any of the front side belt member 31 and the back side belt member 41, and it is desirable to provide the notch portion 37 in the front side belt member 31. Moreover, in this way, based on the opening of the notch portion 37 in the lateral direction, the tightness of the abdominal band member 31 to the abdomen which is more expanded than the spine can be reduced. Moreover, it is possible to provide a disposable diaper 1 for the abdomen.

Further, by providing the notch portion 37 in the central portion of the front side belt member 31 in the lateral direction, the disposable diaper 1 can be prevented from coming into contact with the navel of the wearer. Therefore, the disposable diaper 1 is suitable in the case where the disposable diaper 1 is not expected to hit the wearer's navel, for example, when the navel of the newborn is wet or the jig for preventing bleeding is attached to the umbilicus.

Further, the description of the notch portion 37 and the like of the front side belt member 31 described below is also applicable to the case where the back side belt member 41 is provided with the notch portion 47 substantially. Further, an example in which the back side belt member 41 is provided with the notch portion 47 is considered to be analogous to the following description. Therefore, the description of the case where the back side belt member 41 is provided with the notch portion 47 is omitted.

Fig. 6A is a schematic enlarged view of the abdominal side belt member 31 of the disposable diaper 1 in the pants-type state as seen from the front side. In addition, in the following description, FIG. 6A is demonstrated on the premise of a pants type. In the following description, the paper diaper 1 is described as being in the above-described natural state, and the paper diaper is not completely denied. That is, as long as there are no special restrictions, the following instructions are available. Designed in a natural state, it can also be designed in paper form.

As described above, the front side belt member 31 is provided with elastic members 35, 35, ... for imparting stretchability in the lateral direction to the same side belt member 31. That is, a plurality of elastic members 35, 35, ... in the lateral direction are arranged side by side in the vertical direction. Further, in this example, the position of the elastic member 35a (35) in the lateral direction is discontinuous, and the position of the discontinuous elastic member 35a (35) in the up-and-down direction is provided in the notch portion 37. The range of the up and down direction is A37. Therefore, the tensile force F required when the front side belt member 31 is extended in the lateral direction can be reduced, whereby the surrounding opening BH is easily expanded in the lateral direction. Further, in the notch portion 37, the contraction force of the discontinuous elastic member 35a acts on the direction in which the notch portion 37 is opened in the lateral direction, so that the notch portion 37 is easily opened, which also effectively facilitates the opening of the opening BH. Expand in the horizontal direction.

Further, in this example, the discontinuous elastic member 35a is continuously provided in the lateral direction from the notch portion 37 to the end portion 1ew. Therefore, the stretchable opening BH can be provided with stretchability in a wide range in the lateral direction of the opening BH.

Further, in this example, the upper end 10eu of the absorbent body 10 is located below the lower end 37ed of the notch portion 37, whereby the notch portion 37 is not formed in the absorbent body 10. Therefore, in this example, the absorbent main body 10 is removed from the member constituting the notch portion 37, that is, the notch portion 37 is constituted only by the front side belt member 31. Moreover, since the total amount of the members constituting the notch portion 37 can be reduced, the rigidity of the notch portion 37 can be reduced, and the notch portion 37 can be made soft as a whole. As a result, the notch portion 37 can be made to feel the wearer's skin. good.

Further, this example is a position A 31 between the lower end 37ed of the notch portion 37 and the upper end 10eu of the absorbent main body 10, and one elastic member 35b (35) as an example of at least one elastic member 35 is horizontally and horizontally The position of the notch portion 37 in the lateral direction extends. For example, the elastic member 35b (35) extends from the end portion 1ew on one side in the lateral direction to the other end portion 1ew in the lateral direction via the position of the notch portion 37, and extends in the lateral direction.

Therefore, the state in which the upper end 10eu of the absorbent main body 10 located beside the notch portion 37 is detached from the wearer's skin as the notch portion 37 is opened in the lateral direction can be prevented by the elastic member 35b (35). Further, as a result, the absorbent main body 10 can achieve good conformability to the wearer's skin at the upper end 10eu and its side.

Further, in this example, the upper end 11ceu of the absorbent core 11c is located below the upper end 10eu of the absorbent body 10. That is, the absorbent main body 10 is such that the top sheet 13 and the rear sheet 15 above the absorbent core 11c protrude as described above, and the upper end 11ceu of the absorbent core 11c and the upper end 10eu of the absorbent body 10 are only in the up and down direction. The protruding portion is separated. Further, at a position A10 between the upper end 10eu of the absorbent main body 10 and the upper end 11ceu of the absorbent core 11c, one elastic member 35c (35) as an example of at least one elastic member 35 is transversely crossed in the lateral direction. The position of the notch portion 37 in the direction extends. For example, the elastic member 35c (35) extends from the end portion 1ew of one side in the lateral direction to the other end portion 1ew in the lateral direction via the position of the notch portion 37, and extends in the lateral direction. Settings.

Therefore, when the notch portion 37 is opened in the lateral direction, the upper end 11ceu of the absorbent core 11c located beside the notch portion 37 is detached from the wearer's skin, and can be prevented by the elastic member 35c (35). Further, as a result, the absorbent core 11c has good conformability to the wearer's skin at the upper end 11ceu and its side.

Further, as shown in FIG. 6A, in this example, the absorbent main body 10 is provided in the center portion of the disposable diaper 1 in the lateral direction, and the arrangement position of the notched portion 37 in the lateral direction is located at both ends P10w of the absorbent main body 10 in the lateral direction. P10w is more on the inside. In other words, the notch portion 37 does not protrude further outward in the lateral direction than the absorbent main body 10, whereby the notch portion 37 is positioned closer to the center than the end side in the lateral direction of the disposable diaper 1. Therefore, it is possible to prevent the hand of each end portion 1ew, 1ew placed in the lateral direction of the disposable diaper 1 from being caught in the notch portion 37 in order to expand the dam opening BH, thereby preventing the opening portion 37 from being opened in the lateral direction. . Moreover, the notch portion 37 can be surely opened, and as a result, the expansion opening BH can be effectively assisted. Further, in order to further enhance the effect, it is preferable to arrange the position of the notch portion 37 in the lateral direction at the inner side of the both ends P11cw and P11cw of the absorptive core 11c in the lateral direction, and the example of Fig. 6A is also Set this up.

Further, in this example, as shown in FIG. 6A, the front side belt member 31 can be designed to be divided into three areas A1, A2, and A2 in the lateral direction. In other words, the front side belt member 31 can be designed such that the first region A1 in which the absorbent core 11c is located and the second region A2 in which the absorbent core 11c is not provided on both sides in the lateral direction of the first region A1. , A2, but in this case, the first The predetermined area A1a of the area A1 is set such that the elastic member 35d (35) is discontinuous, whereby the elastic member 35d (35) gives the contraction force in the lateral direction of the predetermined area A1a to be the same as the elastic member 35d ( 35) The magnitude of the contraction force in the lateral direction given to the second region A2 is smaller. More specifically, the contraction force is not substantially applied to the predetermined area A1a. Further, at least a part of the notch portion 37 in the lateral direction (the center portion of this example) is disposed on the inner side of the both ends A1aew and A1aew in the lateral direction of the predetermined region A1a.

Therefore, since the contraction force of the predetermined area A1a is extremely small, the notch portion 37 is easily opened in the lateral direction. In addition, the tensile force F in the lateral direction given by the hands of the respective end portions 1ew and 1ew placed in the lateral direction can be quickly applied to the notch portion 37, and as a result, the notch portion 37 can be quickly moved in the lateral direction. turn on.

Further, when it is desired to further enhance the effect, as shown in FIG. 6B, the arrangement position of the notch portion 37 in the lateral direction (that is, the arrangement position of all the notch portions 37) is positioned in the lateral direction of the predetermined region A1a. The inner sides of the ends A1aew and A1aew are preferred.

Further, as shown in FIG. 6A, the upper edge portion 31BH of this example is formed linearly from the end portion 1ew to the upper end 37eu of the notch portion 37. Therefore, the tensile force F to which the end portion 1ew is applied is easily transmitted over substantially the entire area of the upper edge portion 31BH. Further, by this, it is possible to effectively prevent the opening BH from being expanded in the portion where the tensile force F is not transmitted.

Furthermore, the abdominal belt member 31 will have a notch portion 37 In the case where the portion is referred to as a portion 37ip having a notch portion (corresponding to a portion including the slit portion), it is desirable that the portion 37ip including the notch portion has a different color region A37ip different in color from the surrounding color along the edge portion of the notch portion 37. (refer to the portion of the dot pattern in Fig. 6A) is preferred.

In addition, it is easy to visually confirm the opening state of the notch portion 37, and it is easy to grasp the expansion of the opening BH.

In addition, when the paper diaper is exchanged, the different color area A37ip is not only observed from the non-skin side but also from the skin side. Therefore, if the different color area A37ip is set so as to be visually recognizable from at least one of the non-skin side and the skin side, the above effect can be enjoyed considerably.

Further, in the case where the different color region A37ip is formed in the notch-containing portion 37ip by coloring, the coloring can be performed from the non-skin side or the skin side for the above reasons. However, in this example, the abdominal side belt members 31 are formed by the nonwoven fabrics 32, 33. Therefore, the person existing on the non-skin side or the skin side can be visually recognized from the opposite side so as to pass through the front side belt member 31. Therefore, the portion 37ip containing the notch portion is colored from either the non-skin side and the skin side, and the different color areas A37ip can be visually recognized from both the non-skin side and the skin side.

On the other hand, a different color area A37ip can also be formed by a method other than coloring. For example, a different sheet (not shown) may be provided so as to overlap the portion 37ip having the notch portion, and the different color region A37ip may be formed in the portion 37ip including the notch portion. In addition, in this case, don't The sheet may be disposed on the skin side or the non-skin side of the front side belt member 31, or may be interposed between the two sheets of nonwoven fabrics 32, 33 of the front side belt member 31.

Further, the term "different color" as used herein means that the color difference of the colors of the two regions can be visually recognized by the naked eye. For the "color difference", a commercially available colorimeter can be used to detect two points (two areas) to be measured, and the numerical value can be compared according to the CIE1976 (1*a*b*) color space defined by JIS Z8729 or the like. And find it. Specifically, when the difference between the L* values between the two points of the measurement target is ΔL*, the difference between the a* values is Δa*, and the difference between the b* values is Δb*, the color difference is expressed by the number ΔE*. Ab=[(ΔL*) ² +(Δa*) ² +(Δb*) ² ] ^{1/2 is} obtained. In addition, here, when the color difference ΔE*ab is 1.5 or more, and it is desirable to be 3.0 or more, it is regarded as "colors different from each other". If the ΔE*ab value is 1.5 or more, it can be said that the color is different to the extent that the human eye can detect it, so that the operator of the paper diaper exchange can visually recognize the different color area A37ip of the portion 37ip containing the notch.

Fig. 7 is an explanatory view showing a modification of the disposable diaper 1 for a pants type. In the above embodiment, as shown in FIG. 6A, a notch portion 37 is exemplified as an example of the notch portion. That is, the notch portion 37 having the cut-out area is exemplified. However, as shown in FIG. 7, the modified portion is a linear slit portion 37s, that is, the slit portion 37s does not have a cut-out area. Further, this point is mainly different from the above-described embodiment in this point, and the other points are substantially the same as those of the above embodiment. Therefore, the main explanation will be made below for the different points.

In the modified example, the upper edge portion 31BH of the front side belt member 31 has a slit portion 37s that linearly extends downward at a position inside the lateral direction of each of the end portions 1ew and 1ew. Therefore, when the disposable diaper 1 is expanded in the lateral direction, the slit portion 37s is opened in the lateral direction, so that the opening portion BH can be greatly expanded only by the opening portion, and as a result, the disposable diaper 1 can be easily put on.

However, in the case of the slit portion 37s, the corner portions 37sc, 37sc located on both sides in the lateral direction of the upper portion of the slit portion 37s are easily folded back according to the fold line LB37sc shown by the one-dot chain line in Fig. 7 As a result of the triangular shape, the feeling of the touch of the opening BH is deteriorated. Therefore, from the viewpoint of preventing such a folding back, the notch portion 37 is more desirable than the slit portion 37s.

The length L37s of the slit portion 37s in the vertical direction is, for example, selected from the range of 5 mm to 50 mm in the paper state, and is preferably selected from the range of 10 mm to 30 mm. Further, the shape of the slit portion 37s is not limited to the above-described linear shape. For example, a curved shape such as an arc may be used, and a zigzag line shape or a wave shape may be used.

===Other implementations ===

The embodiments of the present invention have been described above, but the above embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the invention. The present invention may be modified or improved without departing from the scope of the invention, and the invention may of course include equivalents thereof. For example, a deformation as shown below is possible.

The above embodiment and the like are as shown in FIG. 4A, the abdominal side member The upper edge portion 31BH of the 31 is located at a position other than the notch portion 37, and is positioned on the above-described virtual straight line Lu, and the upper edge portion 41BH of the back side belt member 41 is also in the lateral direction and is located on the virtual straight line Lu. However, it is not limited to this at all. For example, as shown in FIG. 8A, at the position other than the notch portion 37, the shape of the upper edge portion 31BH of the front side belt member 31 is an arc shape that protrudes downward, and the upper edge portion 41BH of the back side belt member 41 is The shape may be an arc shape that protrudes downward in the entire length in the lateral direction. In other words, at the position other than the notch portion 37, the upper edge portion 31BH of the front side belt member 31 may be located partially or entirely below the imaginary straight line Lu, and the upper edge portion 41BH of the back side belt member 41 may be Partially or collectively located below the imaginary line Lu. Further, the upper edge portion 31BH of the front side belt member 31 and the upper edge portion 41BH of the back side belt member 41 may not coincide with the position in the vertical direction. For example, as shown in FIG. 8B, the upper edge portion 31BH of the front side belt member 31 may be located below the upper edge portion 41BH of the back side belt member 41, or may be opposite thereto. Moreover, this design may be in the lateral direction, either partially or in full length. In this case, the maximum values L31BHd and L41BHd of the separation distances from the upper edge portions 31BH and 41BH at positions other than the notch portion 37 in the vertical direction are, for example, selected from the range of 1 mm to 40 mm.

As shown in FIG. 2, the above-described embodiment is joined by the end portions 31e and 41e of the front side belt member 31 and the back side belt member 41 in the lateral direction, that is, the end portion 1ew of the paper diaper 1 in the lateral direction is The form of the joint portion is formed, but it is not limited thereto. For example, as shown in FIG. 9, the diaper can also be folded back by a belt member 51 on both sides in the lateral direction. Each of the end portions 1ew and 1ew in the lateral direction of 1 is formed in the form of bent portions 51bn and 51bn. Further, in this case, the respective portions 51f, 51f which are folded back among the belt members 51 are joined to the portion 10p2 constituting the back side portion 40, respectively, and in the same belt member 51, each of the above-mentioned folded portions The portion 51c between the portions 51f, 51f is joined to the portion 10p1 constituting the front side portion 30 in the absorbent body 10.

In the above-described embodiment, a three-piece type disposable diaper 1 as an example of a disposable diaper for a pants type is exemplified, but the present invention is not limited thereto. For example, a disposable diaper having a two-piece shorts type as a second accessory having an outer cover sheet constituting the outer portion of the disposable diaper as the first accessory and having an absorbent main body fixed to the side surface of the outer sheet is used. The constitution of the present invention can be applied. Further, the configuration of the present invention can be applied between a top sheet having a substantially hourglass shape and a rear sheet having a substantially hourglass shape, and a disposable diaper for a pants type in which the absorbent body is inserted.

1‧‧‧Pants disposable disposable diapers

1ew‧‧‧ end

1ewu‧‧‧ upper end

20‧‧‧ Lower part

30‧‧‧ ventral side

31‧‧‧ Ventral belt members

Section 31BHS‧‧‧

37‧‧ ‧ notch (cut, recess)

40‧‧‧ Back side

41‧‧‧Back side belt members

41BH‧‧‧Upper edge

The lateral dimension of the upper edge portion 31BH of the third side belt member 31 of L31BH‧‧

L37d‧‧‧ Maximum value of the longitudinal dimension of the notch 37

The maximum size of the lateral dimension of the notch 37 of the L37w‧‧

F‧‧‧Stretching force

Lu‧‧‧imaginary straight line

Claims (17)

A pants-type disposable disposable diaper having an up-and-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having a front side portion, a back side portion, a circumference opening, and a pair of leg circumference openings, wherein: The front side portion and the back side portion have the stretchability in the lateral direction, and the front side portion and the back side portion are overlapped in the front-rear direction, and the front side portion and the back side portion are formed at each end portion in the lateral direction. The upper edge portion of the front side portion that is the opening of the opening and the upper edge portion of the back side portion that is at least one of the upper edge portions of the opening of the weir is further higher than each of the end portions. The inner side of the lateral direction has only one slit portion extending downward. When the paper diaper is viewed from the front-rear direction, the upper edge portion of the front side portion and the upper edge portion of the back side portion are respectively The entire length in the lateral direction is located below the virtual straight line connecting the upper ends of the respective end portions or on the virtual straight line. The disposable diaper for a shorts type according to claim 1, wherein the member having the cutout portion among the front side portion and the back side portion is provided with a plurality of elastic members arranged in the vertical direction. The member is provided with the stretchability in the lateral direction along the lateral direction, and at least one of the plurality of elastic members is discontinuous in the lateral direction in the slit portion, and the discontinuity is discontinuous. The arrangement position of the elastic member in the vertical direction is Located in the range of the vertical direction in which the slit portion is located. The pants-type disposable disposable diaper according to claim 2, wherein the discontinuous elastic member is continuous in the lateral direction from the slit portion to the end portion. A disposable diaper for a pants type according to any one of claims 1 to 3, wherein the absorbent body has an absorbent main body, and an upper end of the absorbent body is located lower than a lower end of the slit portion. s position. The pants-type disposable diaper according to claim 4, wherein the member having the slit portion among the front side portion and the back side portion is provided with a plurality of elastic members arranged in the vertical direction, the elasticity a member is provided along the lateral direction and for imparting the stretchability to the member, and at least one of the plurality of the elastic members is at a position between the lower end of the cutout portion and the upper end of the absorbent body And extending in the lateral direction across the position of the notch portion in the lateral direction. A disposable diaper for a pants type according to claim 4 or 5, wherein said absorbent body has a liquid absorbing absorbent core, and said upper end of said absorbent core is located at said upper end of said absorbent body In the lower position, at the aforementioned upper end of the absorbent body and the aforementioned absorbent core At least one of the plurality of elastic members in the position between the upper ends extends at a position across the slit portion in the lateral direction in the lateral direction. The disposable diaper for a pants type according to any one of claims 4 to 6, wherein the absorbent main body is located at a central portion of the paper diaper in the lateral direction, and the arrangement position of the slit portion in the lateral direction is The stasis is located further inside than the both ends of the absorbent body in the lateral direction. The disposable diaper for a pants type according to any one of claims 1 to 7, wherein the member having the notch portion among the front side portion and the back side portion is arranged in parallel in the vertical direction An elastic member which is provided in the lateral direction and which imparts the aforementioned stretchability to the member, has an absorbent body that absorbs excrement, and the absorbent body has a liquid-absorbent absorbent core, and the member has a first region where the absorbent core is located, and a second region located on both sides of the first region in the lateral direction and not provided with the absorbent core, wherein the elastic member provides at least a predetermined region of the first region. The magnitude of the contraction force in the lateral direction is smaller than the magnitude of the contraction force in the lateral direction of the second region provided by the elastic member, and the arrangement position of at least a part of the notch portion in the lateral direction. The position is located on the inner side of the both ends in the lateral direction of the predetermined region. The disposable diaper for a pants type according to claim 8, wherein the arrangement position of the slit portion in the lateral direction is located inside the both ends in the lateral direction of the predetermined region. The pants-type disposable disposable diaper according to any one of claims 1 to 9, wherein the slit portion is provided in the front side portion. The pants-type disposable disposable diaper according to any one of claims 1 to 10, wherein the slit portion is located at a central portion of the disposable diaper in the lateral direction. The pants-type disposable disposable diaper according to any one of claims 1 to 11, wherein the slit portion is a recess recessed downward. The disposable diaper for a pants type according to any one of claims 1 to 12, wherein the notch portion is a concave portion that is recessed downward at a central portion of the front side portion in the lateral direction. The pants-type disposable disposable diaper according to any one of claims 1 to 13, wherein the cutout portion is provided in each of the front side portion and the back side portion. The pants-type disposable disposable diaper according to any one of claims 1 to 14, wherein the upper edge portion is formed linearly from the end portion to an upper end of the slit portion. The disposable diaper for a pants type according to any one of claims 1 to 15, wherein the front side portion and the back side portion have the concave portion The member has a portion including the notch portion including the notch portion, and the portion including the notch portion has a different color region different from the surrounding color along the edge portion of the notch portion. The disposable diaper for a pants type according to any one of claims 1 to 16, wherein the horizontal dimension of the upper edge portion in a state in which the stretchability is not present is defined as a paper size. The state in which the paper diaper is contracted by the above-described stretchability is not defined as a natural state by the external force acting on the paper diaper. In this case, the paper diaper in the natural state is turned toward the end portions in the lateral direction. When the both sides in the lateral direction are stretched, the lateral dimension of the upper edge portion having the slit portion is larger than the paper size.