WO2016103982A1

WO2016103982A1 - Pant-type disposable diaper

Info

Publication number: WO2016103982A1
Application number: PCT/JP2015/082248
Authority: WO
Inventors: 潤深澤; 吉岡　稔泰; 紀子長▲瀬▼
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-12-25
Filing date: 2015-11-17
Publication date: 2016-06-30

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

Pants-type disposable diaper

The present invention relates to a pants-type disposable diaper.

Conventionally, a pants-type disposable diaper 1 'has been used. As shown in FIG. 1, the diaper 1 'has a vertical direction, a horizontal direction, and a front-rear direction that are orthogonal to each other. Further, the diaper 1 ′ includes an abdominal side portion 30 ′ located on the front side of the wearer, a back side portion 40 ′ located on the rear side of the wearer, and a crotch portion 20 ′ located on the inseam of the wearer. Have. In each lateral end 1ew ', 1ew', the ventral side 30 'and the back side 40' are continuous, thereby forming a waistline opening BH 'on the upper side. In the lower part, the abdominal part 30 ′ and the dorsal part 40 ′ are continuous via the crotch part 20 ′, whereby a pair of legs are provided on both sides in the lateral direction of the crotch part 20 ′. Openings LH ′ and LH ′ are formed. Further, the abdominal side portion 30 ′ and the back side portion 40 ′ are given lateral stretchability by elastic members 35 ′ and 45 ′ such as rubber thread.

Here, in Patent Document 1, as an example of such a pants-type disposable diaper 1 ′, as shown in FIG. 1, the upper edge portion 40 BH ′ of the back side portion 40 ′ has the lateral end portions 1 ew ′. , 1ew 'diaper 1' protruding above the upper end is disclosed. That is, the back side portion 40 'has a protruding portion 40up' protruding upward from the upper end of each of the end portions 1ew 'and 1ew' in the lateral direction. The protruding portion 40up 'is also provided with an elastic member 45up', thereby imparting lateral stretchability.

On the other hand, when putting the diaper 1 'on the wearer, pulling the lateral ends of the diaper 1' with both hands, such as by placing a hand on the end portions 1ew 'and 1ew' in the lateral direction. Thus, the waist opening BH ′ is expanded laterally.

JP 2012-192115 A

However, in the diaper 1 ′ of Patent Document 1, the lateral tensile force applied to the end portions 1ew ′ and 1ew ′ in the lateral direction is difficult to be transmitted to the protruding portion 40up ′ of the diaper 1 ′. The projecting portion 40up ′ is difficult to extend in the lateral direction, and as a result, there is a problem that it is difficult to expand the waist opening BH ′ of the diaper 1 ′.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to easily widen the waist opening of the pants-type disposable diaper in the lateral direction so that the diaper can be easily worn. .

The main invention for achieving the above object is:
A pants-type disposable diaper having an up-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having an abdominal side portion, a back side portion, a waistline opening, and a pair of leg-hole openings,
The ventral part and the dorsal part have the lateral stretchability,
The ventral part and the dorsal part overlap in the front-rear direction,
The ventral side and the dorsal side are continuous at each lateral end,
At least one upper edge portion of the upper edge portion that becomes the waistline opening in the abdominal side portion and the upper edge portion that becomes the waistline opening in the back side portion is located on the inner side in the lateral direction than the end portions. In the position, it has only one cut part extending downward,
When the diaper is viewed from the front-rear direction, the upper edge portion of the abdominal side portion and the upper edge portion of the back side portion respectively extend over the entire length in the lateral direction, and the upper ends at the respective end portions. The pants-type disposable diaper is characterized by being positioned below or on the virtual line connecting the virtual lines.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

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

It is a schematic perspective view of an example of a pants-type disposable diaper 1 '. It is the schematic perspective view which looked at the 3 piece type diaper 1 as an example of the underpants type disposable diaper 1 of this embodiment from the ventral side. It is the schematic plan view which looked at the diaper 1 of the unfolding state from the skin side. It is BB sectional drawing in FIG. 3A. It is the schematic plan view which looked at the diaper 1 of the underpants type state of this embodiment from the ventral side. It is a schematic plan view of the diaper 1 of the underpants type | mold for demonstrating the malfunction when the upper edge part 31BH has two or

more notch parts

37 and 37. FIG. FIG. 5A is a schematic perspective view of the diaper 1 in a pants-type state in which a cutout portion 37 is provided in the dorsal band member 41 instead of the ventral band member 31, and FIG. 5B illustrates the ventral band member 31 and the dorsal band member. FIG. 4 is a schematic perspective view of a diaper 1 in a pants-type state in which cutout portions 37 are provided in each of both 41; It is the schematic enlarged view which looked at the ventral side belt member 31 of the diaper 1 of the underpants type state from the front side. It is a schematic enlarged view which shows the example which the arrangement position of the notch part 37 in the horizontal direction is settled in predetermined area | region A1a in which the contraction force by elastic member 35d (35) is substantially absent. It is explanatory drawing of the modification of the underpants type disposable diaper. 8A and 8B are schematic plan views showing examples in which the upper edge portions 31BH and 41BH of the ventral side band member 31 and the back side band member 41 are positioned below the virtual straight line Lu, respectively. It is a schematic perspective view which shows the example by which each edge part 1ew and 1ew of the horizontal direction of the diaper 1 are formed in the form of the bending part 51bn by the one belt | band | zone member 51 being respectively folded in the both sides of a horizontal direction.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
A pants-type disposable diaper having an up-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having an abdominal side portion, a back side portion, a waistline opening, and a pair of leg-hole openings,
The ventral part and the dorsal part have the lateral stretchability,
The ventral part and the dorsal part overlap in the front-rear direction,
The ventral side and the dorsal side are continuous at each lateral end,
At least one upper edge portion of the upper edge portion that becomes the waistline opening in the abdominal side portion and the upper edge portion that becomes the waistline opening in the back side portion is located on the inner side in the lateral direction than the end portions. In the position, it has only one cut part extending downward,
When the diaper is viewed from the front-rear direction, the upper edge portion of the abdominal side portion and the upper edge portion of the back side portion respectively extend over the entire length in the lateral direction, and the upper ends at the respective end portions. The pants-type disposable diaper is characterized by being positioned below or on the virtual line connecting the virtual lines.

According to such a pants-type disposable diaper, the abdomen side part and the back side part do not have a part which protrudes upwards rather than each edge part of a horizontal direction. Therefore, when the end portions are spread in the lateral direction by placing a hand or the like, the lateral tensile force applied to the end portions at that time is quickly applied to the upper edge portions of the ventral side portion and the dorsal side portion. Each upper edge extends in the lateral direction. As a result, the waistline opening can be smoothly spread in the lateral direction, and as a result, the diaper can be easily worn.
Moreover, the said diaper has a cut part in the upper edge part. Therefore, when the diaper is expanded in the lateral direction, the cut portion opens in the lateral direction, so that the waistline opening can be further expanded by the amount of the opening, and as a result, the diaper can be more easily worn.

Furthermore, only one cut part is provided for the upper edge part. Therefore, the trouble which may occur when two or more cut parts are provided on the upper edge part, that is, the trouble that the tensile force is difficult to be transmitted to the part between the cut parts of the upper edge part is prevented. Can do. And thereby, the tensile force given to each edge part of a horizontal direction can be rapidly transmitted over the substantially full length of the horizontal direction of an upper edge part, As a result, a trunk periphery opening is expanded more smoothly. be able to.

Such a pants-type disposable diaper,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
At least one elastic member of the plurality of elastic members is discontinuous at the position of the cut portion in the lateral direction, and the disposition position of the discontinuous elastic member in the vertical direction is: It is desirable that the cut portion is included in the vertical range.

According to such a pants-type disposable diaper, the at least one elastic member is discontinuous at the position of the cut portion in the lateral direction. Therefore, the pulling force required when the member is extended in the lateral direction can be reduced, and thereby the waistline opening can be easily expanded in the lateral direction.

Such a pants-type disposable diaper,
The discontinuous elastic member is preferably continuous in the lateral direction from the cut portion to the end portion.

According to such a pants-type disposable diaper, the discontinuous elastic member is continuous in the lateral direction from the cut portion to the end portion. Therefore, stretchability can be imparted to the waistline opening over a wide range in the lateral direction of the waistline opening.

Such a pants-type disposable diaper,
Has an absorbent body that absorbs excreta,
As for the upper end of the absorptive main part, it is desirable to be spaced apart and lower than the lower end of the cut part.

According to such a pants-type disposable diaper, the cut portion is not formed in the absorbent main body. Therefore, the total amount of the members constituting the cut portion can be reduced, and as a result, the rigidity of the cut portion can be lowered as a whole and softened. And as a result, the contact condition of the cut part to a wearer's skin can be made favorable.

Such a pants-type disposable diaper,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
At a position between the lower end of the cut portion and the upper end of the absorbent main body, at least one elastic member of the plurality of elastic members positions the position of the cut portion in the lateral direction. It is desirable to extend over the direction.

According to such a pants-type disposable diaper, the situation in which the upper end of the absorbent main body located in the vicinity of the cut portion floats from the wearer's skin as the cut portion opens in the lateral direction. This can be prevented by an elastic member extending across the position in the lateral direction. And as a result, an absorptive main body can show | form favorable fitting property to a wearer's skin in an upper end and its vicinity.

Such a pants-type disposable diaper,
The absorbent body has a liquid absorbent absorbent core;
The upper end of the absorbent core is positioned to be spaced below the upper end of the absorbent main body,
At a position between the upper end of the absorbent main body and the upper end of the absorbent core, at least one elastic member of the plurality of elastic members defines the position of the cut portion in the lateral direction. It is desirable to extend so as to straddle the lateral direction.

According to such a pants-type disposable diaper, the situation where the upper end of the absorbent core located in the vicinity of the cut part greatly floats from the wearer's skin as the cut part opens in the lateral direction is described above. This can be prevented by an elastic member extending across the position in the lateral direction. And as a result, an absorptive core can show | form favorable fitting property to a wearer's skin in an upper end and its vicinity.

Such a pants-type disposable diaper,
The absorbent main body is located at a central portion in the lateral direction of the diaper,
As for the arrangement position of the cut part in the transverse direction, it is desirable to be located inside the both ends of the absorptive main part in the transverse direction.

According to such a pants-type disposable diaper, the cut portion is located closer to the center than the lateral end of the diaper. Therefore, it is possible to prevent a hand placed on each end portion of the diaper in the lateral direction to widen the waistline opening, and to prevent the cut portion from being opened laterally. be able to. And thereby, a cut part can open firmly, As a result, it contributes effectively to expanding a trunk periphery opening.

Such a pants-type disposable diaper,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
While having an absorbent main body that absorbs excrement, the absorbent main body has a liquid absorbent absorbent core,
The member includes a first region in which the absorbent core is located, and a second region in which the absorbent core is not located on both sides of the first region in the lateral direction,
The magnitude of the lateral contraction force applied from the elastic member to at least a predetermined area in the first area is smaller than the magnitude of the lateral contraction force applied from the elastic member to the second area. ,
It is desirable that the arrangement position of at least a part of the cut portion in the lateral direction is located inside the both ends in the lateral direction in the predetermined region.

According to such a pants-type disposable diaper, the arrangement position of at least a part of the cut portion is located on the inner side of the both ends in the lateral direction in the predetermined area. Here, the contraction force in the predetermined area Since the size of is small, the cut part is easy to open in the lateral direction. Therefore, the lateral pulling force applied from the hand applied to each end in the lateral direction quickly acts on the cut portion, and thus the cut portion can be quickly opened in the lateral direction.

Such a pants-type disposable diaper,
As for the arrangement position of the cut part in the horizontal direction, it is desirable to be located inside the both ends of the horizontal direction in the predetermined field.

According to such a pants-type disposable diaper, the arrangement position of the cut portion is located on the inner side of the both ends in the lateral direction in the predetermined region. Here, the magnitude of the contraction force in the predetermined region is Since it is small, the cut part is easy to open in the lateral direction. Therefore, the lateral pulling force applied from the hand applied to each end in the lateral direction quickly acts on the cut portion, and thus the cut portion can be quickly opened in the lateral direction.

Such a pants-type disposable diaper,
The cut part is preferably provided on the ventral part.

According to such a pants-type disposable diaper, since the cut portion is provided on the abdominal side, it is possible to reduce the tightening of the stomach on the abdominal side based on the lateral opening of the cut portion. And this makes your stomach easier.

Such a pants-type disposable diaper,
It is desirable that the cut portion is located at a central portion in the lateral direction of the diaper.

According to such a pants-type disposable diaper, since the cut part is formed in the center part, it opens evenly in the lateral direction. In addition, the transferability of the tensile force at the upper edge portion is substantially uniform between the portions on both sides of the cut portion. Therefore, it becomes easy to widen the waistline opening.

Such a pants-type disposable diaper,
It is desirable that the cut portion is a concave portion recessed downward.

According to such a pants-type disposable diaper, since the cut part is a concave part, the triangular part of the corner part located on both sides in the lateral direction of the upper end of the cut part that can occur when the cut part is slit-shaped Generation etc. can be prevented.

Such a pants-type disposable diaper,
It is desirable that the cut portion is a concave portion that is recessed downward while being located in the central portion in the lateral direction on the ventral side portion.

According to such a pants-type disposable diaper, since the cut part is formed in the central part in the lateral direction on the abdominal side part, it is possible to prevent the diaper from being applied to the wearer's navel. Therefore, it is a suitable diaper when it is not desired to apply a diaper to the wearer's navel, for example, when the newborn's navel is wet or when a clip for bleeding prevention is attached to the navel.

Such a pants-type disposable diaper,
It is desirable that one cut portion is provided for each of the ventral side portion and the dorsal side portion.

According to such a pants-type disposable diaper, since there are cut portions on both the abdominal side and the back side that can be opened when a tensile force is applied to both sides in the lateral direction, the waistline opening is provided. It becomes easier to spread.
Further, one cut portion is provided for each of the ventral side portion and the back side portion. Therefore, a problem that may occur when two or more cut portions are provided on at least one upper edge portion, that is, it is difficult to transmit a pulling force to a portion between the cut portions of the upper edge portion. A malfunction can be prevented. And thereby, the tensile force given to each edge part of a horizontal direction can be rapidly transmitted over the substantially full length of a horizontal direction with respect to each upper edge part of a stomach side part and a back side part, respectively. As a result, the waistline opening can be expanded more smoothly.

Such a pants-type disposable diaper,
It is desirable that the upper edge portion is formed linearly from the end portion to the upper end of the cut portion.

According to such a pants-type disposable diaper, since the upper edge is formed in a straight line from the lateral end to the upper end of the cut part, the tensile force applied to the end is the upper edge. It becomes easy to be transmitted over almost the whole area. As a result, the waistline opening can be widened while effectively preventing folding or the like that may occur in a portion where the tensile force is not transmitted.

Such a pants-type disposable diaper,
The member having the concave portion among the ventral side portion and the back side portion has a cut portion-containing portion having the cut portion,
It is desirable that the cut portion-containing portion has a different color region having a color different from the surrounding color along the edge of the cut portion.

According to such a pants-type disposable diaper, it is easy to visually check the open state of the cut part. And it becomes easy to grasp | ascertain the extent of the trunk periphery opening by this.

Such a pants-type disposable diaper,
The horizontal dimension of the upper edge in a virtual state when there is no elasticity is defined as a paper pattern dimension,
When a state in which the diaper contracts based on the elasticity without external force acting on the diaper is defined as a natural state,
When the diaper in the natural state is pulled to both sides in the lateral direction at the respective end portions in the lateral direction, the lateral dimension of the upper edge portion having the cut portion is larger than the pattern size. Is desirable.

According to such a pants-type disposable diaper, when a diaper in a natural state is pulled at both ends in the lateral direction at the respective ends, the lateral direction of the upper edge portion is based on the lateral opening of the cut portion. The dimensions are larger than the paper pattern dimensions. Therefore, the waistline opening can be greatly widened in the lateral direction, and the diaper can be easily worn.

=== This Embodiment ===
FIG. 2: is the schematic perspective view which looked at the 3 piece type diaper 1 as an example of the underpants type disposable diaper 1 of this embodiment from the ventral side. 3A is a schematic plan view of the unfolded diaper 1 viewed from the skin side, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 3A.

The diaper 1 has an up-down direction, a lateral direction, and a front-rear direction as three directions orthogonal to each other in the pant-type state of FIG. In the following description, the upper side and the lower side in the up-and-down direction in this pant-type state are also referred to as the “trunk opening side” and the “inseam side”, respectively, and the front side and the rear side in the front-rear direction are respectively “ Also referred to as “ventral” and “dorsal”.
On the other hand, in the unfolded state of FIGS. 3A and 3B, the diaper 1 has a vertical direction, a horizontal direction, and a thickness direction as three directions orthogonal to each other. In the following, in the developed state, the one side and the other side in the vertical direction are also referred to as “abdominal side” and “back side”, respectively, and the one side and the other side in the thickness direction are respectively referred to as “skin”. Also referred to as “side” and “non-skin side”.
Incidentally, the lateral direction has the same meaning in the pant-type state and the unfolded state. On the other hand, the vertical direction of the unfolded state is along the vertical 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.

Since this diaper 1 is a so-called three-piece type, in the developed state of FIG. 3A, it has an absorbent main body 10 that absorbs excrement as a first part, and a ventral belt member 31 as a second part, A back band member 41 is provided as a third part. Specifically, in the state where the ventral belt member 31 and the back belt member 41 are arranged in parallel in the vertical direction, the absorbent main body 10 is stretched between the both 31 and 41 while the same absorbency. End portions 10ea and 10eb in the longitudinal direction of the main body 10 are joined and fixed to the

nearest belt members

31 and 41, respectively, and the external shape thereof is substantially H-shaped in plan view.
Then, from the substantially H-shaped developed state, the absorbent main body 10 is folded in two with a predetermined position CL10 in the vertical direction of the absorbent main body 10 (a position corresponding to the central position CL1 of the diaper 1 in the vertical direction) as a folding position. In addition, when the

band members

31, 41 facing each other in the folded state are joined by welding or the like at the

end portions

31e, 41e in the lateral direction, the

band members

31, 41 are connected in a ring shape. Thus, the pants-type diaper 1 is formed in which the waistline opening BH and the pair of leg-hole openings LH and LH as shown in FIG. 2 are formed. That is, when the

end portions

31e and 41e are joined together to form the end portion 1ew in the lateral direction of the diaper 1, the ventral band member 31 and the back band member 41 are continuous at the end portion 1ew. Thus, the waist opening BH is formed at the upper side, and the pair of leg opening LH, LH is formed at the lower side.

In this pant-type state (FIG. 2), the diaper 1 can be divided into three

parts

20, 30, 40 in units different from the above-mentioned three

parts

10, 31, 41. That is, the diaper 1 is divided into three parts: an abdominal side portion 30 located on the front side of the wearer, a back side portion 40 located on the rear side of the wearer, and a crotch portion 20 located on the crotch of the wearer. Can be divided into And in this example, as shown to FIG. 3A, the former ventral part 30 has the ventral belt member 31 and the part 10p1 which overlaps with the ventral belt member 31 in the absorptive main body 10, and the crotch 20 Has a portion 10p3 that protrudes in the longitudinal direction from the abdominal band member 31 and the back side band member 41 in the absorbent main body 10, and the back side portion 40 is the back of the back side band member 41 and the absorbent main body 10. A portion 10p2 overlapping the side band member 41.

In the following description, it is assumed that there is no contraction force due to the

elastic members

16, 18, 35, and 45 described below for imparting stretchability to the diaper 1 in both the unfolded state and the pant-type state. The state in which the pattern spreads is called “pattern state”. A state in which no external force acts on the diaper 1, that is, a state in which the diaper 1 is contracted by the contraction force of the

elastic members

16, 18, 35, 45 is referred to as a “natural state”. Incidentally, in FIG. 3A and FIG. 3B, the unfolded diaper 1 is shown as a pattern.

3A and 3B, the absorbent main body 10 has a substantially rectangular shape in plan view. And the longitudinal direction of the absorptive main body 10 is distribute | arranged so that the longitudinal direction may be followed. Moreover, the absorptive main body 10 has an absorbent body 11, a top sheet 13 provided so as to cover the absorbent body 11 from the skin side, a back sheet 15 provided so as to cover the absorbent body 11 from the non-skin side, It has.

The absorbent body 11 has a liquid absorbent absorbent core 11c and a core wrap sheet (not shown) that covers the outer peripheral surface of the core 11c. The absorbent core 11c is a molded body obtained by molding a predetermined liquid absorbent material into a substantially hourglass shape in plan view as an example of a predetermined shape. As a liquid absorptive material, liquid absorptive granular materials, such as liquid absorptive fibers, such as pulp fiber, and superabsorbent polymer (what is called SAP) can be illustrated. The core wrap sheet may be a liquid permeable sheet such as tissue paper or non-woven fabric, but the core wrap sheet may be omitted. Moreover, the shape of the absorptive core 11c is not limited to the above-mentioned substantially hourglass shape in plan view, but may be other shapes.

The top sheet 13 is a liquid-permeable sheet such as a non-woven fabric having a planar size that protrudes from the absorbent body 11 in the vertical direction and the horizontal direction. The back sheet 15 is also a sheet having a planar size that protrudes from the absorbent body 11 in the vertical direction and the horizontal direction. As an example, a liquid-impermeable leak-proof sheet 15a such as a polyethylene film or a polypropylene film is used. And a laminate sheet 15 having a two-layer structure including a non-woven exterior sheet 15b bonded to the non-skin side of the leak-proof sheet 15a (FIG. 3B). Then, in a state where the absorbent body 11 is sandwiched between the top sheet 13 and the back sheet 15, the two

sheets

13, 15 are bonded to each other in a frame shape, for example, at a portion protruding from the absorbent body 11 in the vertical direction and the horizontal direction. The absorptive main body 10 is formed by joining by welding or the like. Note that the back sheet 15 may include only the leak-proof sheet 15a without including the exterior sheet 15b.

Further, as in the example of FIG. 3A, leg gathers LG that expand and contract in the vertical direction may be provided in each portion 10LG in the lateral direction outside the absorbent body 11 in the absorbent main body 10. Such leg gathers LG constitute part of the leg opening LH. Further, the stretchability of the leg gather LG is given by fixing the elastic member 16 such as rubber thread in the longitudinal direction in each of the portions 10LG in the longitudinal direction. That is, the contraction force in the vertical direction is applied from the elastic member 16 to each of the above portions 10LG, so that in the natural state where no external force is applied, each of the portions 10LG forms a plurality of wrinkles. Shrink in the direction. Therefore, the leg gather LG is provided with stretchability until the wrinkles are fully extended.

Furthermore, as in the example of FIG. 3, a pair of leg side gathers LSG and LSG may be provided at a position inside in the lateral direction from the leg gather LG. The leg side gather LSG is also called a three-dimensional gather, and stands up from the skin side surface of the top sheet 13 to prevent the excrement from leaking in the lateral direction. That is, a non-woven leg side gather sheet 17 is superimposed on the skin side surface of the top sheet 13, and a part (not shown) of the sheet 17 is fixed to the top sheet 13, thereby In the same sheet 17, a portion 17LSG on the inner side in the lateral direction with respect to the portion is erected. Incidentally, the standing of the inner portion 17LSG is realized by the elastic member 18 such as rubber thread being fixed to the inner portion 17LSG in the vertical direction under extension. That is, the inner portion 17LSG is given a contraction force in the vertical direction from the elastic member 18, thereby causing the inner portion 17LSG to contract in the vertical direction while forming a plurality of wrinkles. Stands from the skin side of the top sheet 13.

As shown in FIG. 3A, the ventral belt member 31 is a sheet member having a substantially rectangular shape in a plan view made of a flexible sheet such as a nonwoven fabric. In this example, as shown in FIG. 3B, the ventral band member 31 is formed by joining the

nonwoven fabrics

32 and 33 in two layers. And as shown to FIG. 3A and 3B, the center part of the horizontal direction of the ventral | abdominal band member 31 is piled up and joined to the end part 10ea of the abdominal side of the absorptive main body 10 from the non-skin side. . Note that the longitudinal end 31eL (FIG. 3A) of the ventral belt member 31 that protrudes laterally from the absorbent main body 10 constitutes a part of the leg opening LH.

As shown in FIGS. 3A and 3B, a plurality of

elastic members

35, 35, etc., such as thread rubber, are provided along the lateral direction between the two

nonwoven fabrics

32, 33 associated with the ventral belt member 31. It is joined and fixed to the

nonwoven fabrics

32 and 33 under the extension in the horizontal direction while being inserted side by side in the vertical direction. As a result, a contractive force in the lateral direction is applied to the ventral band member 31. That is, the stretchability in the lateral direction is given to the ventral band member 31. Further, in this example, as shown in FIG. 3A, the part of the ventral belt member 31 that overlaps the absorber 11 (for example, the central portion in the lateral direction) is prevented from generating wrinkles of the absorber 11. For the purpose, the elastic member 35 is discontinuous, and thereby, no elasticity is given to this portion, but this is not a limitation. In this example, the elastic member 35 whose longitudinal position is the same as that of a notch 37 to be described later is also discontinuous at the position of the notch 37. The elastic member 35 will be described later.

As shown in FIG. 3A, the dorsal belt member 41 is a sheet member having a substantially rectangular shape in plan view made of a flexible sheet such as a nonwoven fabric. In this example, as shown in FIG. 3B, the dorsal belt member 41 is formed by joining the

non-woven fabrics

42 and 43 in two layers. And as shown to FIG. 3A and 3B, the center part of the horizontal direction of the back | dorsal band member 41 is piled up and joined from the non-skin side to the edge part 10eb of the vertical direction in the absorptive main body 10 from the non-skin side. . Note that the longitudinal end 41eL (FIG. 3A) of the back-side belt member 41 that protrudes laterally from the absorbent main body 10 constitutes a part of the leg opening LH.

3A and 3B, a plurality of

elastic members

45, 45, etc., such as thread rubber along the lateral direction, are provided between the two

nonwoven fabrics

42, 43 related to the back band member 41. It is joined and fixed to the

nonwoven fabrics

42 and 43 under the extension in the horizontal direction while being inserted side by side in the vertical direction. As a result, a lateral contractive force is applied to the back band member 41. That is, the back side belt member 41 is provided with lateral stretchability. Further, in this example, as shown in FIG. 3A, a part of the back band member 41 that overlaps the absorber 11 (for example, the central portion in the lateral direction) is prevented from generating wrinkles of the absorber 11 or the like. For the purpose, the elastic member 45 is discontinuous, and thereby, the stretchability is not given to this portion, but this is not a limitation.

As mentioned above, although the

main components

10, 31, and 41 of the diaper 1 were demonstrated, when making a wearer wear the underpants type diaper 1 in this embodiment, the trunk periphery opening BH of the diaper 1 is set to a horizontal direction. It is devised to make it easier to spread. Hereinafter, this device will be described.
FIG. 4A is a schematic plan view of the pants-type diaper 1 according to the present embodiment as viewed from the ventral side.
In the present embodiment, first, when the diaper 1 in the pants-type state and the natural state (or the paper pattern state) is viewed from the front-rear direction, the upper edge portion 31BH and the back-side portion of the abdominal side band member 31 belonging to the abdominal side portion 30. The upper edge portion 41BH of the dorsal belt member 41 belonging to 40 is positioned below or hypothetical to the virtual straight line Lu connecting the upper ends 1ewu and 1ewu at the respective end portions 1ew and 1ew over the entire length in the lateral direction. It is located on the straight line Lu. Specifically, in the example of FIG. 4A, the upper edge portion 31BH of the ventral band member 31 is positioned below the virtual straight line Lu at the position of the notch 37, and the virtual straight line Lu at positions other than the notch 37. The upper edge portion 41BH of the back side belt member 41 is located on the virtual straight line Lu over the entire length in the lateral direction. As a result, the ventral band member 31 and the dorsal band member 41 have protruding portions protruding above the upper ends 1ewu and 1ewu at the respective end portions 1ew and 1ew in the lateral direction (see the protruding portion 40up ′ in FIG. 1). I don't have it.
Therefore, when the end portions 1ew and 1ew are spread in the lateral direction, for example, the lateral tensile force F applied to the end portions 1ew and 1ew at that time is determined by the ventral band member 31 and the dorsal band. The upper edge portions 31BH and 41BH of the member 41 are quickly transmitted to the upper edge portions 31BH and 41BH, and the upper edge portions 31BH and 41BH extend in the lateral direction. As a result, the waist opening BH can be smoothly expanded in the lateral direction, and as a result, the diaper 1 can be easily put on.
Further, the upper edge portion 31BH of the abdominal band member 31 has, as an example of a cut portion, a cutout portion 37 (corresponding to a concave portion) cut out so as to be recessed below the surrounding portion. That is, the upper edge portion 31BH has a notch portion 37 extending downward at a position on the inner side in the lateral direction from the end portions 1ew and 1ew.
Therefore, when the diaper 1 is expanded in the lateral direction, the cutout portion 37 opens in the lateral direction, so that the waistline opening BH can be further expanded by that amount. That is, when the lateral dimension L31BH of the upper edge portion 31BH of the ventral band member 31BH in the pattern state is defined as the pattern dimension L31BHK (FIG. 3A), the diaper 1 in the pants-type state and the natural state in FIG. When each of the end portions 1ew and 1ew is pulled to both sides in the lateral direction, the lateral dimension L31BH of the upper edge portion 31BH of the ventral belt member 31 is based on the lateral opening of the notch portion 37. The paper pattern size is larger than 31 BHK. Therefore, the waist opening BH can be greatly widened in the lateral direction, and the diaper 1 can be more easily worn.

Furthermore, only one notch 37 is provided for the upper edge 31BH of the ventral belt member 31. Therefore, as in the reference example of FIG. 4B, a problem that may occur when two or

more cutout portions

37, 37 are provided in the upper edge portion 31 </ b> BH of the ventral belt member 31, i.e. It is possible to prevent a problem that the tensile force F is difficult to be transmitted to the portion 31BHPB between the

notches

37 and 37. As a result, the tensile force F applied to each of the end portions 1ew and 1ew in the lateral direction can be quickly transmitted over substantially the entire length of the upper edge portion 31BH in the lateral direction. BH can be spread more smoothly.

Further, as shown in FIG. 4A, the notch 37 is located in the lateral center of the ventral band member 31. Therefore, the notch part 37 opens equally in the horizontal direction. Further, the transferability of the tensile force F at the upper edge portion 31BH is also substantially uniform between the portions 31BHS and 31BHS on both sides of the notch portion 37 in the upper edge portion 31BH. And this can also contribute to the improvement of the easiness of expansion of the waist opening BH. However, it is not limited to this. That is, the notch 37 may be formed at a position shifted laterally from the center.

In the example of FIG. 4A, the notch 37 has a curved shape in an arc shape in the pattern state. Then, the maximum value L37d of the vertical dimension of the cutout portion 37 in the same paper state is selected from a range of 10 mm to 30 mm, for example, and is 15 mm in this example, and is the maximum horizontal dimension of the cutout portion 37. The value L37w is selected from a range of 50 mm to 100 mm, for example, and is 85 mm in this example. However, the shape of the notch 37 is not limited to an arc shape. For example, it may be a rectangular shape or a triangular shape, or may be a polygonal shape other than these. Further, a composite shape combining a curve and a straight line may be used.

In the example of FIG. 4A, the notch 47 is not provided for the upper edge portion 41BH of the dorsal belt member 41 belonging to the dorsal portion 40, but the present invention is not limited to this. For example, a cutout portion 47 may be provided in the dorsal band member 41 instead of the cutout portion 37 of the ventral side band member 31 as shown in FIG. 5A, or a cutout portion of the ventral side band member 31 as shown in FIG. 5B. In addition to the portion 37, a cutout portion 47 may be provided in the back band member 41. In this case, for the same reason as described above, it is desirable to provide only one notch portion 47 on the upper edge portion 41BH of the back band member 41 as shown in FIGS. 5A and 5B. Further, if the cutout portion 37 (47) is provided only in one of the ventral belt member 31 and the back belt member 41, it is desirable to provide the cutout portion 37 in the ventral belt member 31. And if it does in this way, based on the opening of the notch part 37 in the horizontal direction, clamping of the abdominal side band member 31 to the stomach of the shape swollen rather than the back can be reduced. And thereby, the diaper 1 with a comfortable stomach can be provided.
Furthermore, if the notch part 37 is provided in the center part of the horizontal direction in the ventral | abdominal side band member 31 in this way, it can also be made not to apply the diaper 1 to a wearer's navel. Therefore, when it is not desired to apply the diaper 1 to the wearer's navel, for example, when the newborn's navel is wet or a bleeding prevention clip is attached to the navel, the diaper 1 is suitable. .

Note that the description of the cutout portion 37 and the like of the ventral side band member 31 described below basically applies to the case where the cutout portion 47 is provided in the back side band member 41. An example in which the cutout portion 47 is provided in the dorsal belt member 41 can be inferred from the following description. Therefore, the description when the cutout portion 47 is provided in the back side belt member 41 is omitted.

FIG. 6A is a schematic enlarged view of the ventral belt member 31 of the diaper 1 in a pants-type state as viewed from the front side. In the following description, explanation will be made on the premise of a pants-type state as shown in FIG. 6A. In the following description, the diaper 1 is described as being in the above-described natural state, but this does not deny that the diaper 1 is in the pattern state. That is, unless otherwise specified, the following description may be understood as being in a natural state or as being in a pattern state.

As described above, the ventral band member 31 is provided with

elastic members

35, 35,... For imparting lateral stretchability to the ventral band member 31. That is, a plurality of elastic members 35 along the lateral direction are provided side by side in the vertical direction. In this example, some of the elastic members 35a (35) are discontinuous at the positions of the notches 37 in the lateral direction, and the discontinuous elastic members 35a (35) are arranged in the vertical direction. The position is included in a range A37 in the vertical direction where the notch 37 is present. Therefore, it is possible to reduce the pulling force F required when the ventral belt member 31 is extended in the lateral direction, and it becomes easy to widen the waistline opening BH in the lateral direction. In addition, since the contraction force of the discontinuous elastic member 35a acts on the cutout portion 37 in the direction of opening the cutout portion 37 in the lateral direction, the cutout portion 37 can be easily opened. This contributes to making BH easy to spread in the lateral direction.

In this example, the non-continuous elastic member 35a is continuously provided in the lateral direction from the notch 37 to the end 1ew described above. Therefore, stretchability can be imparted to the waistline opening BH over a wide range in the lateral direction of the waistline opening BH.

Furthermore, in this example, the upper end 10eu of the absorbent main body 10 is positioned below the lower end 37ed of the notch 37, so that the notch 37 is formed in the absorbent main body 10. Not. Therefore, in this example, the absorptive main body 10 is excluded from the members constituting the notch portion 37, that is, the notch portion 37 is constituted only by the ventral band member 31. As a result, the total amount of the members constituting the cutout portion 37 can be reduced, whereby the cutout portion 37 can be generally softened through a decrease in the rigidity of the cutout portion 37. As a result, the degree of contact of the notch 37 with the wearer's skin can be improved.

In this example, at the position A31 between the lower end 37ed of the notch 37 and the upper end 10eu of the absorbent body 10, one elastic member 35b (35) as an example of at least one elastic member 35, It extends so as to straddle the position of the notch 37 in the lateral direction in the lateral direction. For example, the elastic member 35b (35) is provided so as to continuously extend in the lateral direction from the lateral end 1ew to the lateral end 1ew through the position of the notch 37. It has been.

Therefore, the situation where the upper end 10eu of the absorbent main body 10 located in the vicinity of the notch 37 floats from the skin of the wearer as the notch 37 opens in the lateral direction is referred to as the elastic member 35b (35 ) Can prevent. And as a result, the absorptive main body 10 can show the favorable fitting property to a wearer's skin in upper end 10eu and its vicinity.

Furthermore, in this example, the upper end 11 ceu of the absorbent core 11 c is positioned lower than the upper end 10 eu of the absorbent main body 10. That is, in the absorbent main body 10, as described above, the top sheet 13 and the back sheet 15 protrude above the absorbent core 11 c, and the upper end 11 ceu of the absorbent core 11 c is equivalent to this protrusion. And the upper end 10eu of the absorbent main body 10 are spaced apart in the vertical direction. In addition, 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, three elastic members 35c (35) as an example of at least one elastic member 35 are arranged in the lateral direction. It extends so as to straddle the position of the notch 37 in the lateral direction. For example, the elastic member 35c (35) is provided so as to extend continuously in the lateral direction from the lateral end 1ew to the lateral end 1ew through the position of the notch 37. It has been.

Therefore, the situation where the upper end 11 ceu of the absorbent core 11 c located in the vicinity of the notch 37 greatly floats from the wearer's skin as the notch 37 opens in the lateral direction is referred to as the elastic member 35 c ( 35). And as a result, the absorptive core 11c can show | form favorable fitting property to a wearer's skin in upper end 11ceu and its vicinity.

Moreover, as shown in FIG. 6A, in this example, the absorbent main body 10 is provided in the center of the diaper 1 in the horizontal direction, but the arrangement position of the notch 37 in the horizontal direction is the absorbent main body. 10 is located inside the lateral ends P10w, P10w. That is, the cutout portion 37 does not protrude outward in the lateral direction from the absorbent main body 10, so that the cutout portion 37 is located on the center side with respect to the lateral end side of the diaper 1. Yes. Therefore, it is possible to prevent the hand placed on each of the lateral ends 1ew, 1ew of the diaper 1 so as to widen the waistline opening BH from being applied to the cutout portion 37, whereby the cutout portion 37 is formed. It is possible to avoid a situation in which it does not open laterally. And the notch part 37 can open firmly, As a result, it can contribute to expanding the trunk periphery opening BH effectively. In order to further enhance this effect, the arrangement position of the cutout portion 37 in the lateral direction may be stored inside the lateral ends P11cw and P11cw in the absorbent core 11c. In the example of FIG. 6A, It ’s also like that.

Furthermore, in this example, as shown in FIG. 6A, the ventral belt member 31 can be divided into three regions A1, A2, and A2 in the lateral direction. That is, the ventral belt member 31 is divided into a first region A1 where the absorbent core 11c is located and second regions A2 and A2 which are located on both lateral sides of the first region A1 and where the absorbent core 11c is not located. In this case, in the predetermined area A1a in the first area A1, the elastic member 35d (35) is discontinuous, whereby the elastic member 35d (35) is provided in the predetermined area A1a. The lateral contraction force applied from the elastic member 35d (35) is smaller than the lateral contraction force applied from the elastic member 35d (35) to the second region A2. More specifically, in the predetermined area A1a, substantially no contraction force is applied. Further, the arrangement position of at least a part of the cutout portion 37 in the lateral direction (in this example, the central portion) is located inside the lateral ends A1aew and A1aew in the predetermined region A1a.

Therefore, based on the fact that the magnitude of the contraction force in the predetermined area A1a is very small, the notch 37 is easily opened in the lateral direction. As a result, the lateral pulling force F applied from the hands applied to the respective lateral ends 1ew, 1ew can quickly act on the notch 37, and as a result, the notch 37 Can open quickly in the horizontal direction.

In order to further enhance this effect, as shown in FIG. 6B, the arrangement positions of the cutout portions 37 in the horizontal direction (that is, the arrangement positions of all the cutout portions 37) are set in the horizontal direction in the predetermined area A1a. What is necessary is just to fit in the inner side of the both ends A1aew of a direction, A1aew.

Further, as shown in FIG. 6A, in this example, the upper edge portion 31BH is formed linearly from the end portion 1ew to the upper end 37eu of the cutout portion 37. Therefore, the tensile force F applied to the end portion 1ew is easily transmitted over substantially the entire area of the upper edge portion 31BH. Thus, it is possible to widen the waistline opening BH while effectively preventing folding or the like that may occur in a portion where the tensile force F is not transmitted.

Furthermore, when the portion having the cutout portion 37 in the ventral side belt member 31 is referred to as a cutout portion containing portion 37ip (corresponding to a cut portion containing portion), preferably, this cutout portion containing portion 37ip is: A different color area A37ip (refer to the dot pattern portion in FIG. 6A) of a color different from the surrounding color may be provided along the edge of the cutout portion 37.
And if it becomes like this, since it will become easy to visually confirm the opening condition of the notch part 37, it will become easy to grasp | ascertain the expansion condition of the trunk periphery opening BH on the basis of this.

In addition, when changing diapers, it can be considered that the different color region A37ip is viewed not only from the non-skin side but also from the skin side. Therefore, if the different color region A37ip is visible from at least one of the non-skin side and the skin side, the above-described effects can be enjoyed accordingly.
Moreover, when forming this color difference area | region A37ip in the notch part containing part 37ip by coloring, the said coloring may be performed from the non-skin side from the reason mentioned above, and may be performed from the skin side. However, in this example, the ventral band member 31 is formed of

nonwoven fabrics

32 and 33. Therefore, the thing which exists in the non-skin side or the skin side in the form which permeate | transmits the said ventral | abdominal band member 31 is visually recognizable also from the reverse side. Therefore, even if the cutout portion containing portion 37ip is colored from either the non-skin side or the skin side, the different color region A37ip can be viewed from both the non-skin side and the skin side.

On the other hand, the different color region A37ip may be formed by a method other than coloring. For example, the above-described different color region A37ip may be formed in the notch containing part 37ip by providing another sheet (not shown) so as to overlap the notch containing part 37ip. In this case, the separate sheet may be disposed on the skin side or the non-skin side of the ventral band member 31, or may be interposed between the two

nonwoven fabrics

32 and 33 of the ventral band member 31. May be.

The “different colors” referred to here are two colors that allow the color difference between the two regions to be visually recognized. Regarding “color difference”, two points (two areas) to be measured are measured using a commercially available colorimeter, and based on the CIE 1976 (L * a * b *) color space defined in JISZ8729 etc. It can be obtained by comparing numerical values. Specifically, when the difference in L * value between two points to be measured is ΔL *, the difference in a * value is Δa *, and the difference in b * value is Δb *, the color difference is expressed by the equation ΔE * ab = [(ΔL *) ² + (Δa *) ² + (Δb *) ² ] ^1/2 Here, when the color difference ΔE * ab is 1.5 or more, preferably 3.0 or more, it is assumed that the colors are 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 a human can perceive it. Therefore, the diaper changing operator visually recognizes the color difference area A37ip of the notch-containing part 37ip. can do.

FIG. 7 is an explanatory view of a modified example of the pants-type disposable diaper 1. In the above-described embodiment, as illustrated in FIG. 6A, the notch portion 37 is illustrated as an example of the cut portion. That is, the cut portion 37 having a cut area is illustrated, but in this modification, as shown in FIG. 7, the cut portion is a linear slit portion 37s, that is, the cut portion 37s has a cut area. It is different in that it is not. And this point is mainly different from the above-described embodiment, and other points are generally the same as the above-described embodiment. Therefore, this difference will be mainly described below.

In this modification, the upper edge portion 31BH of the ventral band member 31 has a slit portion 37s extending linearly downward at a position on the inner side in the lateral direction with respect to the aforementioned end portions 1ew and 1ew. Therefore, when the diaper 1 is expanded in the lateral direction, the slit portion 37s is opened in the lateral direction, so that the waistline opening BH can be greatly expanded by the opening, and as a result, the diaper 1 can be easily put on.

However, in the case of the slit portion 37s, the corner portions 37sc and 37sc located on both sides in the lateral direction of the upper portion of the slit portion 37s are easily folded back into a triangular shape by a broken line LB37sc shown by a one-dot chain line in FIG. As a result, the tactile sensation of the waistline opening BH may be deteriorated. Therefore, from the viewpoint of preventing such folding, the above-described notched portion 37 is more preferable than the slit portion 37s.
The length L37s in the vertical direction of the slit portion 37s is selected from a range of 5 mm to 50 mm, for example, in a pattern, and is preferably selected from a range of 10 mm to 30 mm. Further, the shape of the slit portion 37s is not limited to the above-described linear shape, and may be a curved shape such as an arc, a zigzag line shape, or a wavy line shape, for example.
=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

In the above-described embodiment and the like, as shown in FIG. 4A, the upper edge portion 31BH of the ventral side band member 31 is positioned on the above-described virtual straight line Lu at a position other than the notch 37, and the back side band member 41 The upper edge portion 41BH was also located on the virtual straight line Lu over the entire length in the lateral direction. However, it is not limited to this. For example, as shown in FIG. 8A, the shape of the upper edge portion 31BH of the ventral side belt member 31 at a position other than the notch 37 is a downwardly convex arc shape, and the upper edge portion 41BH of the back side belt member 41 The shape may also be a downwardly convex arc shape over the entire length in the lateral direction. In other words, the upper edge 31BH of the ventral belt member 31 may be partially or entirely located below the virtual straight line Lu at a position other than the notch 37, or the upper edge of the back belt member 41. 41BH may also be located partially or entirely below the virtual straight line Lu. Furthermore, the upper edge portion 31BH of the ventral side belt member 31 and the upper edge portion 41BH of the back side belt member 41 may not coincide with each other in the vertical direction. For example, as shown in FIG. 8B, the upper edge portion 31BH of the abdominal band member 31 may be positioned below the upper edge portion 41BH of the back side band member 41, or vice versa. This may be partial in the lateral direction or over the entire length. In this case, the maximum values L31BHd and L41BHd of the vertical separation distances of the upper edge portions 31BH and 41BH from the virtual straight line Lu at positions other than the notch portion 37 are selected from a range of 1 mm to 40 mm, for example. .

In the above-described embodiment and the like, as shown in FIG. 2, the abdomen side band member 31 and the back side band member 41 are joined at the

end parts

31 e and 41 e in the horizontal direction, so that the end part 1 ew in the horizontal direction of the diaper 1 is Although it was formed in the form of a so-called joint, it is not limited to this. For example, as shown in FIG. 9, one band member 51 is folded on both sides in the lateral direction, so that the respective end portions 1ew and 1ew in the lateral direction of the diaper 1 are formed in the form of bent portions 51bn and 51bn. Also good. In this case, the folded

portions

51f and 51f of the band member 51 are respectively joined to the portion 10p2 constituting the back side portion 40 in the absorbent main body 10, and among the band member 51 The part 51c between the folded

parts

51f and 51f is joined to the part 10p1 constituting the ventral part 30 in the absorbent main body 10.

In the above-described embodiment and the like, the three-piece type diaper 1 is illustrated as an example of the pants-type disposable diaper, but the present invention is not limited thereto. For example, a two-piece type pants-type disposable diaper having an exterior sheet that forms an exterior of a diaper as a first part and an absorbent main body fixed to the skin side surface of the exterior sheet as a second part. May be applied. In addition, the configuration of the present invention may be applied to a pants-type disposable diaper in which an absorber is interposed between a substantially hourglass-shaped top sheet and a substantially hourglass-shaped back sheet.

1 pants-type disposable diaper, 1ew end, 1ewu upper end,
10 Absorbent body, 10p1 part, 10p2 part, 10p3 part,
10LG part, 10ea end, 10eb end, 10eu upper end,
11 absorber, 11c absorbent core, 11ceu upper end,
13 Top sheet, 15 Back sheet, 15a Leak-proof sheet, 15b Exterior sheet,
16 elastic member,
17 Legside gather sheet, 17LSG part,
18 elastic member,
20 Inseam,
30 ventral side, 31 ventral band member, 31BH upper edge,
31BHPB part, 31BHS part, 31e end, 31eL end,
32 non-woven fabric, 33 non-woven fabric,
35 elastic member, 35a elastic member, 35b elastic member, 35c elastic member, 35d elastic member,
37 notch (cut, recess), 37ed lower end, 37eu upper end,
37ip notch containing part (cut part containing part),
37s slit part (cut part), 37sc corner part,
40 dorsal side, 41 dorsal belt member, 41BH upper edge, 41eL end,
42 non-woven fabric, 43 non-woven fabric, 45 elastic member,
47 Notch (cut),
51 band member, 51f folded part, 51c part, 51bn folded part,
A1 first area, A1a predetermined area, both ends of A1aeew, A2 second area,
A10 position, A37 range, A37ip different color area,
BH waist opening, LH leg opening,
CL1 center position, CL10 predetermined position,
Lu virtual straight line, LG leg gather, LSG leg side gather,
LB37sc line,
P10w both ends, P11cw both ends,
F pulling force,

Claims

A pants-type disposable diaper having an up-down direction, a lateral direction, and a front-rear direction orthogonal to each other, and having an abdominal side portion, a back side portion, a waistline opening, and a pair of leg-hole openings,
The ventral part and the dorsal part have the lateral stretchability,
The ventral part and the dorsal part overlap in the front-rear direction,
The ventral side and the dorsal side are continuous at each lateral end,
At least one upper edge portion of the upper edge portion that becomes the waistline opening in the abdominal side portion and the upper edge portion that becomes the waistline opening in the back side portion is located on the inner side in the lateral direction than the end portions. In the position, it has only one cut part extending downward,
When the diaper is viewed from the front-rear direction, the upper edge portion of the abdominal side portion and the upper edge portion of the back side portion respectively extend over the entire length in the lateral direction, and the upper ends at the respective end portions. A pants-type disposable diaper characterized by being positioned below or on the virtual line connecting the virtual lines.
The pants-type disposable diaper according to claim 1,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
At least one elastic member of the plurality of elastic members is discontinuous at the position of the cut portion in the lateral direction, and the disposition position of the discontinuous elastic member in the vertical direction is: A pants-type disposable diaper characterized by being included in the vertical range where the cut portion exists.
The pants-type disposable diaper according to claim 2,
The pants-type disposable diaper, wherein the discontinuous elastic member is continuous in the lateral direction from the cut portion to the end portion.
A pants-type disposable diaper according to any one of claims 1 to 3,
Has an absorbent body that absorbs excreta,
A pants-type disposable diaper characterized in that the upper end of the absorbent main body is positioned lower than the lower end of the cut part.
The pants-type disposable diaper according to claim 4,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
At a position between the lower end of the cut portion and the upper end of the absorbent main body, at least one elastic member of the plurality of elastic members positions the position of the cut portion in the lateral direction. A pants-type disposable diaper characterized by extending in a direction.
The pants-type disposable diaper according to claim 4 or 5,
The absorbent body has a liquid absorbent absorbent core;
The upper end of the absorbent core is positioned to be spaced below the upper end of the absorbent main body,
At a position between the upper end of the absorbent main body and the upper end of the absorbent core, at least one elastic member of the plurality of elastic members defines the position of the cut portion in the lateral direction. A pants-type disposable diaper characterized by extending in a transverse direction.
A pants-type disposable diaper according to any one of claims 4 to 6,
The absorbent main body is located at a central portion in the lateral direction of the diaper,
The pants-type disposable diaper characterized in that the arrangement position of the cut portion in the lateral direction is located inside the both ends in the lateral direction of the absorbent main body.
A pants-type disposable diaper according to any one of claims 1 to 7,
The member having the cut portion of the ventral portion and the dorsal portion includes a plurality of elastic members along the lateral direction for providing the member with the stretchability in the vertical direction. And
While having an absorbent main body that absorbs excrement, the absorbent main body has a liquid absorbent absorbent core,
The member includes a first region in which the absorbent core is located, and a second region in which the absorbent core is not located on both sides of the first region in the lateral direction,
The magnitude of the lateral contraction force applied from the elastic member to at least a predetermined area in the first area is smaller than the magnitude of the lateral contraction force applied from the elastic member to the second area. ,
An underpants-type disposable diaper, wherein an arrangement position of at least a part of the cut portion in the lateral direction is located inside the both ends in the lateral direction in the predetermined region.
The pants-type disposable diaper according to claim 8,
The pants-type disposable diaper, wherein the arrangement position of the cut portion in the lateral direction is located inside the both ends in the lateral direction in the predetermined region.
A pants-type disposable diaper according to any one of claims 1 to 9,
The said cut part is provided in the said ventral | abdominal side part, The pants type disposable diaper characterized by the above-mentioned.
A pants-type disposable diaper according to any one of claims 1 to 10,
The said cut part is located in the center part of the said horizontal direction in the said diaper, The pants type disposable diaper characterized by the above-mentioned.
A pants-type disposable diaper according to any one of claims 1 to 11,
The pants-type disposable diaper, wherein the cut part is a concave part recessed downward.
A pants-type disposable diaper according to any one of claims 1 to 12,
The pants-type disposable diaper, wherein the cut portion is a concave portion that is recessed downward while being located at a central portion in the lateral direction on the ventral side portion.
A pants-type disposable diaper according to any one of claims 1 to 13,
One pants-type disposable diaper, wherein one cut portion is provided on each of the ventral side portion and the dorsal side portion.
A pants-type disposable diaper according to any one of claims 1 to 14,
The pants-type disposable diaper, wherein the upper edge portion is formed linearly from the end portion to the upper end of the cut portion.
A pants-type disposable diaper according to any one of claims 1 to 15,
The member having the concave portion among the ventral side portion and the back side portion has a cut portion-containing portion having the cut portion,
The pants-type disposable diaper, wherein the cut portion-containing portion has a different color region of a color different from the surrounding color along the edge of the cut portion.
A pants-type disposable diaper according to any one of claims 1 to 16,
The horizontal dimension of the upper edge in a virtual state when there is no elasticity is defined as a paper pattern dimension,
When a state in which the diaper contracts based on the elasticity without external force acting on the diaper is defined as a natural state,
When the diaper in the natural state is pulled to both sides in the lateral direction at the respective end portions in the lateral direction, the lateral dimension of the upper edge portion having the cut portion is larger than the pattern size. A pants-type disposable diaper characterized by that.