WO2016194480A1

WO2016194480A1 - Absorbent article

Info

Publication number: WO2016194480A1
Application number: PCT/JP2016/061661
Authority: WO
Inventors: 中嶋　海陽; 友美衛藤; 健人梨子木
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-05-29
Filing date: 2016-04-11
Publication date: 2016-12-08
Also published as: CN107613930B; KR20180002866A; JP2016220940A; KR101844208B1; CN107613930A; JP6226909B2

Abstract

This absorbent article is provided with an absorbent main body (10), leg gather parts (20), and belt parts (30). When the absorbent article is in a state of being extended along the longitudinal direction of the absorbent main body (10), the leg gather parts (20) are disposed at both sides of the absorbent main body (10) in the horizontal direction, and the belt parts (30) are disposed so as to overlap the leg gather parts (20) and portions of the absorbent main body (10) in the thickness direction. The sum total of the widths of front-side belt cutout portions (35f) in the horizontal direction and the widths of front-side leg gather cutout portions (25f) in the horizontal direction, in a position a prescribed distance inward in the longitudinal direction from the front ends of leg-surrounding openings in the longitudinal direction, is equal to or greater than the sum total of the widths of rear-side belt cutout portions (35r) in the horizontal direction and the widths of rear-side leg gather cutout portions (25r) in the horizontal direction, in a position the same prescribed distance inward in the longitudinal direction from the rear ends of the leg-surrounding openings in the longitudinal direction.

Description

Absorbent articles

The present invention relates to an absorbent article.

Conventionally, it has an absorptive body that absorbs excrement such as urine, and a waist belt that is joined to both ends of the absorptive body in the longitudinal direction and connects the front and rear waist regions, and a waist opening (trunk opening) and a pair of leg openings A pants-type absorbent article in which (leg opening) is formed is known. For example, in Patent Document 1, the longitudinal direction of the absorbent main body is aligned with the longitudinal direction of the waist belt, both are arranged, a part of the waist belt is cut out to provide a leg opening, and the longitudinal direction of the absorbent main body A pants-type absorbent article is disclosed in which an absorbent main body and a waist belt are joined by joints from both ends in the direction toward the leg opening.

JP-T 8-507699

The pant-type absorbent article described in Patent Document 1 is provided with a notch in a leg opening so as to be symmetric with respect to the longitudinal direction (longitudinal direction) and the width direction. That is, the position of the leg opening is the center of the absorbent article, and the shape is symmetrical between the ventral side and the back side (front and back). On the other hand, the shape of the human body differs between the ventral side and the back side, so wearing an absorbent article that is actually formed in a pant shape does not match the shape of the body and the good fit It was difficult to get. For example, the leg opening is narrow on the abdominal side (front side), and the movement of the wearer's leg is interfered, or the leg opening is wide on the back side (rear side), so that the wearer's buttocks cannot be covered sufficiently Problems sometimes occur.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pant-type diaper having good fit in the vicinity of the leg opening.

A main invention for achieving the above object is an absorbent article having a longitudinal direction, a lateral direction, and a thickness direction, and comprising an absorbent main body, a leg gather part, and a belt part, wherein the absorbent article In a state where the absorbent article is extended along the longitudinal direction of the absorbent main body, the leg gather portions are arranged on both sides in the lateral direction of the absorbent main body, and the belt portion is formed of the absorbent main body. A part and the leg gather portion are arranged so as to overlap in the thickness direction, and a pair of leg opening portions are formed by notches provided in the belt portion and the leg gather portion, and the belt The portion is joined to the absorbent main body and the leg gather portion at a joint portion inclined outward in the lateral direction from both end portions in the longitudinal direction toward the leg opening. The cut-out notched portion includes a front belt cut-out portion on the front side of the longitudinal center position of the leg opening and a rear belt cut-out portion on the rear side, and is provided in the leg gather portion. The cutout portion includes a front leg gather cutout portion on the front side of the longitudinal center position and a rear leg gather cutout portion on the rear side, and the front end in the longitudinal direction of the leg opening portion. The total of the lateral width of the front belt notch portion and the lateral width of the front leg gather notch portion at a position separated from the longitudinal direction by a predetermined distance is the leg circumference. The lateral width of the rear belt notch and the width of the rear leg gather notch at a position separated from the rear end in the longitudinal direction of the opening by the predetermined distance inside the longitudinal direction. With horizontal width At least a absorbent article, characterized in that.

Other features of the present invention will be clarified by the description of the present specification and the accompanying drawings.

According to the present invention, it is possible to provide a pant-type diaper having good fit in the vicinity of the leg opening.

It is a schematic perspective view showing the appearance of diaper 1. FIG. 2A is a plan view illustrating the diaper 1 in a state of being stretched along the longitudinal direction. 2B is a schematic cross-sectional view illustrating the AA cross section of FIG. 2A. FIG. 3A is a plan development view illustrating a state in which the diaper 1 in a state of being stretched along the longitudinal direction is developed in the middle of the manufacturing process. FIG. 3B is a schematic cross-sectional view showing the BB cross section of FIG. 3A. It is a figure explaining an example of the manufacturing process of the diaper. It is a figure explaining the shape of leg opening HL. FIG. 6A is a side view illustrating a state in which a conventional pants-type diaper is worn. FIG. 6B is a side view illustrating a state in which the diaper 1 of the first embodiment is worn. FIG. 7A is a plan view illustrating the diaper 2 in a state of being stretched along the longitudinal direction of the absorbent main body 10. FIG. 7B is a schematic cross-sectional view showing the CC cross section of FIG. 7A. It is a figure explaining an example of the manufacturing process of the diaper.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent article having a longitudinal direction, a transverse direction, and a thickness direction, comprising an absorbent main body, a leg gather portion, and a belt portion, wherein the absorbent article is the longitudinal direction of the absorbent main body. The leg gather portions are disposed on both sides of the absorbent main body in the lateral direction, and the belt portion includes a part of the absorbent main body, the leg gather portions, and the thickness. A pair of leg hole openings are formed by notches provided in the belt part and the leg gather part, and the belt part extends from both ends in the longitudinal direction. Joined to the absorbent main body and the leg gather part at a joint part inclined outward in the lateral direction toward the leg opening, and the notch part provided in the belt part is provided around the leg part. Aperture A front belt cutout portion on the front side of the central position in the longitudinal direction and a rear belt cutout portion on the rear side, and the cutout portion provided in the leg gather portion from the central position in the longitudinal direction A front leg gather cutout portion on the front side and a rear leg gather cutout portion on the rear side, and a position separated from the front end in the longitudinal direction of the leg opening by a predetermined distance inside the longitudinal direction. The sum of the lateral width of the front belt notch and the lateral width of the front leg gather notch is the sum of the longitudinal direction from the rear end of the leg opening in the longitudinal direction. The lateral width of the rear belt notch portion and the lateral width of the rear leg gather notch portion at or above the predetermined distance are equal to or greater than the sum of the lateral widths of the rear leg gather notch portions. Absorbent articles

According to such an absorbent article, the size of the leg opening is wide on the wearer's belly side (front side) and narrow on the wearer's back side (rear side). Therefore, when the pants-type diaper is worn, the wearer can easily move the leg forward, and can easily perform an operation such as walking while wearing the diaper. On the other hand, since the width of the belt part and the leg gather part is wide on the back side, the wearer's buttocks are easily covered with the belt part or the like when the diaper is worn. Thereby, the fit in a leg opening part can be made favorable.

In such an absorbent article, it is desirable that the leg gather portion and the belt portion are formed of a single member.

According to such an absorbent article, since a joint portion or the like is not provided between the belt portion and the leg gather portion, stress is applied to the boundary portion between the belt portion and the leg gather portion when the diaper is worn. Even in the case of concentration, it becomes difficult to form the starting point of the tear. Thereby, it can suppress that a diaper is torn in a leg periphery opening part.

In this absorbent article, the leg gather portion has a width in the lateral direction between a front end in the longitudinal direction of the leg-hole opening and a rear end in the longitudinal direction of the leg-hole opening. It is desirable to have the narrowest part.

According to such an absorbent article, when the diaper is worn, the width of the leg gather portion is reduced in the vicinity of the region that comes into contact with the wearer's groin, so that interference between the leg gather and the wearer's groin is suppressed. Thus, the fit can be improved and the uncomfortable feeling when wearing the diaper can be reduced.

In such an absorbent article, the belt portion has the lateral width between the front end in the longitudinal direction of the leg opening and the rear end in the longitudinal direction of the leg opening. It is desirable to have a narrowing portion.

According to such an absorbent article, when the diaper is worn, the width of the belt portion is narrowed in a region that comes into contact with the periphery of the wearer's hip bone (pelvis). This area is the part where the wearer grips and pulls the belt part when pulling up the diaper. Therefore, by narrowing the width of the belt part in this area, the belt part can be grasped firmly. It becomes possible to wear a diaper, and the fit at the time of wearing can be improved more.

In such an absorbent article, the width in the lateral direction of the front leg gather notch at a position away from the front end in the longitudinal direction of the leg opening by a predetermined distance inside the longitudinal direction, It is desirable that the width of the front belt notch portion is larger than the width in the lateral direction at a position away from the front end in the longitudinal direction of the leg opening by the predetermined distance inward of the longitudinal direction.

According to such an absorbent article, in the operation of wearing a diaper formed in a pants shape, when the wearer pulls the belt part in the lateral direction and passes the leg through the leg opening, the leg finger moves to the leg. It becomes difficult to get caught in the gather part and it becomes easy to wear the diaper 1. In addition, after the diaper is worn, the leg opening is easily formed along the shape of the wearer's leg, so that the movement of the leg is less likely to be hindered, and it seems to be underwear such as clean shorts or briefs. Appearance can be realized.

In such an absorbent article, it is desirable that an elastic sheet member having stretchability is arranged in a stretched state in the longitudinal direction at the peripheral edge of the leg opening.

According to such an absorbent article, since the periphery of the leg opening is surrounded by the elastic sheet member, and the sheet (nonwoven fabric) of the belt part and the leg gather part is reinforced in the part, the strength of the leg opening The diaper can become more difficult to tear.

In such an absorbent article, the elastic sheet member disposed in an area overlapping the leg gather portion has at least the leg width at the center position in the longitudinal direction of the leg opening. It is desirable that the width is narrower than the width in the lateral direction at the rear end of the longitudinal opening in the longitudinal direction.

According to such an absorbent article, since the width of the elastic sheet member becomes narrow in the vicinity of the center position in the longitudinal direction of the leg opening that contacts the buttocks of the wearer, the contraction force acting on the region is hardly dispersed. Become. Thereby, the fitting property of a leg periphery opening part can be improved. Moreover, since the width | variety of an elastic sheet member becomes large in the longitudinal direction rear-end part vicinity which is an area | region which covers a wearer's buttocks, contraction force becomes easy to act on the wide range in the said area | region. Thereby, the fastening force to the wearer's skin in the buttocks is dispersed, and discomfort due to excessive fastening can be made difficult to occur.

In this absorbent article, at least a part of the elastic sheet member is formed in a state in which the thread-like elastic member is extended in the longitudinal direction in the region in the lateral direction of the leg opening of the leg gather portion. The lateral distance between the end of the leg opening and the thread-like elastic member at the center position in the longitudinal direction of the leg opening is at least that of the leg opening. It is desirable that the distance between the end of the leg opening at the front end in the longitudinal direction and the thread-like elastic member is smaller than the lateral distance.

According to such an absorbent article, the distance between the end of the leg opening and the thread-like elastic member is small at the center position in the longitudinal direction of the leg opening that contacts the wearer's buttocks. Moreover, it is hard to produce a clearance gap between the leg periphery opening part HL and a wearer's groin part, and it can suppress that excrement leaks outside. In addition, in the vicinity of the front end in the longitudinal direction of the leg opening, since the distance between the end of the leg opening and the thread-like elastic member is increased, it is easy to reduce the occurrence of wrinkles and tackiness due to the leg gather elastic member, The appearance when wearing a diaper can be made clean.

In such an absorbent article, the smaller one of the angles formed by the first joint portion formed on the front side in the longitudinal direction and the longitudinal direction is a second joint formed on the rear side in the longitudinal direction. It is desirable that the angle is larger than the smaller one of the angles formed by the portion and the longitudinal direction.

According to such an absorbent article, the angle formed between the absorbent main body and the belt portion in a state where the diaper is formed in a pants shape is likely to be large on the front side (belly side) and small on the rear side (back side). As a result, when the diaper is worn, the rear side of the absorbent main body is easily pulled up to the upper part of the wearer's buttocks, and a gap is hardly formed between the wearer's buttocks and the fit is improved. Moreover, since the buttock becomes a clean impression in appearance, it is difficult to give the wearer a resistance to wearing a diaper.

In such an absorbent article, it is desirable that a predetermined interval is provided between the joint and the leg opening.

According to such an absorbent article, since the joint part formed in the diaper and the peripheral part of the leg opening are not intersecting with each other, the starting point of the tear is hardly formed in the peripheral part of the leg opening. It becomes easy to suppress that it breaks.

=== First Embodiment ===
<Basic configuration of pants-type disposable diaper 1>
A pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) will be described as an example of the absorbent article according to the first embodiment.

FIG. 1 is a schematic perspective view showing the appearance of the diaper 1. The diaper 1 has the absorptive main body 10, the leg gather part 20, and the belt part 30, and has a pants-type shape as shown in FIG. 1 when worn. The diaper 1 has a “longitudinal direction” and a “lateral direction” orthogonal to each other in the pant-type state of FIG. 1. And the waist part opening part HB is formed in the upper side of the vertical direction of the diaper 1, and a pair of leg periphery opening part HL is formed in the both sides of a horizontal direction. Moreover, the front side of the diaper 1 is a part which covers a wearer's belly side at the time of wear, and a back side is a part which covers a wearer's back side.

FIG. 2A is a plan view illustrating the diaper 1 in a state of being stretched along the longitudinal direction of the absorbent main body 10. 2B is a schematic cross-sectional view illustrating the AA cross section of FIG. 2A. FIG. 3A is a plan development view illustrating a state in which the diaper 1 in a state of being stretched along the longitudinal direction of the absorbent main body 10 is developed during the manufacturing process. FIG. 3B is a schematic cross-sectional view showing the BB cross section of FIG. 3A.

The diaper 1 is in a planar state as shown in FIG. 2A at the final stage of the manufacturing process. The manufacturing process of the diaper 1 will be described later with reference to FIG. The planar diaper 1 has a “longitudinal direction”, a “lateral direction”, and a “thickness direction” as three directions orthogonal to each other. The longitudinal direction of the diaper 1 in a planar state is a direction along the longitudinal direction of the absorbent main body 10. This longitudinal direction is a direction corresponding to the vertical direction in the pant-type state of FIG. 1, but strictly speaking, the vertical direction in the pant-type state and the vertical direction in the planar state are slightly different, so it is necessary. In such a case, “longitudinal direction in a pants-type state”, “longitudinal direction in a planar state”, and the like are distinguished from each other. In FIG. 2A, the state in which the diaper 1 is stretched along the longitudinal direction (that is, a planar state) means that the diaper 1 is stretched in the longitudinal direction against the contraction force by the leg gather elastic member 23 and the belt elastic member 33 described later. When it is extended, it means a state where it is extended to such an extent that no wrinkles or gathers can be visually recognized at the portion where each elastic member is arranged. Furthermore, the shape of the diaper 1 in the state of being extended in the longitudinal direction is the same as the shape of the diaper 1 when it is flatly extended when the contraction force by various elastic members such as the leg gather elastic member 23 is not expressed. It is.

Moreover, in the following description, in the state which extended the absorptive main body 10 to the longitudinal direction, let the side which hits a wearer's belly side be the front side (belly side) of a longitudinal direction, and let the side which hits a wearer's back side be a longitudinal direction. The rear side (back side). The lateral direction of the diaper 1 in a planar state is the same concept as the lateral direction and the thickness direction of the diaper 1 in the pant-type state in FIG. The thickness direction of the diaper 1 in a planar state is a direction orthogonal to the longitudinal direction and the lateral direction, respectively, and the side in contact with the wearer's skin is referred to as “skin side”, and the opposite side is referred to as “non- "Skin side".

As shown in FIGS. 2A and 2B, in the diaper 1 in a flat state, the absorbent main body 10 is disposed along the longitudinal direction, and a pair of leg gathers 20 is provided on both sides of the absorbent main body 10 in the lateral direction. Is arranged. And a pair of belt part 30 is arrange | positioned so that a part of absorptive main body 10 and the leg gather part 20 may overlap with the skin side of a thickness direction. In the diaper 1 of 1st Embodiment, as FIG. 3A shows, the leg gather part 20 and the belt part 30 are formed of the side seat | sheet 40 which is one sheet member. The leg gather part 20 and the belt part 30 are formed by folding the side sheet 40 inward in the lateral direction along a folding line FL extending in the longitudinal direction.

The leg gather portion 20 is provided with a leg gather cutout portion 25 that is partially cut out at the laterally outer end portion 20eо (folding line FL). Similarly, the belt portion 30 is provided with a belt cutout portion 35 that is partially cut out at the laterally outer end portion 30eо (folding line FL). The leg gather cutout portion 25 and the belt cutout portion 35 form a leg opening HL.

The belt portion 30 is composed of the absorbent main body 10 (strictly speaking, the absorbent main body 10 is defined by a pair of first joint portions WL1 inclined from the longitudinal front end 10ef of the absorbent main body 10 toward the leg opening HL. The top sheet 13) disposed on the skin side and the leg gathers 20 are joined. Similarly, the belt portion 30 includes the absorbent main body 10 and the leg gather portion 20 by a pair of second joint portions WL2 inclined from the longitudinal rear end portion 10er of the absorbent main body 10 toward the leg opening HL. It is joined. The first joint WL1 and the second joint WL2 are joined by known welding means such as thermal welding or ultrasonic welding, but may be joined using an adhesive such as a hot melt adhesive. .

Note that if the smaller angle of the angles formed by the first joint portion WL1 with the longitudinal direction is the inclination angle θ1, and the smaller angle of the angles formed by the second joint portion WL2 with the longitudinal direction is the inclination angle θ2, the inclination angle. Each joint is formed such that θ1 is larger than the inclination angle θ2 of the second joint WL2 with respect to the longitudinal direction. Although details will be described later, by adjusting the inclination angles θ1 and θ2 of the joints in this way, the diaper 1 is made to have a shape closer to underwear such as shorts or briefs when formed into a pants shape. At the same time, it is possible to improve the fit when worn.

While the diaper 1 having such a flat state is opened in the pair of

belt portions

30 and 30 with the lateral inner end portions 30ei and 30ei on both sides in the lateral direction, the absorbent main body 10 is moved in the vicinity of the central position CL in the longitudinal direction. By folding it, the pants-type diaper 1 can be worn. At this time, a waistline opening HB is formed by the longitudinal front end 10ef, the longitudinal rear end 10er of the absorbent main body 10, and the inner ends 30ei of the pair of belt portions 30 (see FIG. 1).

As shown in FIG. 2A, the absorbent main body 10 is cut in the longitudinal direction by cutting a substantially rectangular member (see FIG. 3A) extending in the longitudinal direction along the first joint WL1 and the second joint WL2. Each end portion is a sheet-like member having a tapered shape in a plan view. The absorptive main body 10 is provided with an absorbent body 11, a top sheet 13 (corresponding to a skin-side sheet) provided by covering the absorbent body 11 from the skin side, and covering the absorbent body 11 from the non-skin side. And a back sheet 15 (corresponding to a non-skin side sheet). Each of these

members

13, 11, and 15 is joined to a member adjacent in the thickness direction by a hot melt adhesive or the like (see FIGS. 2B and 3B). Examples of the application pattern of the adhesive include an Ω pattern, a spiral pattern, and a stripe pattern, and the same applies to other adhesives that appear later.

The absorbent body 11 has an absorbent core in which a predetermined liquid absorbent material is formed into a predetermined shape (for example, a substantially hourglass shape in plan view), and a core wrap sheet that covers the outer peripheral surface of the absorbent core, It is a member that absorbs excreted fluid such as urine when the diaper 1 is worn. 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. As the core wrap sheet, a liquid permeable sheet such as tissue paper or nonwoven fabric can be used. The shape of the absorbent body 11 is not limited to a substantially hourglass shape in plan view as shown in FIG. 3A, and may be another shape.

The top sheet 13 is formed of a flexible sheet member having liquid permeability, and for example, a sheet member such as an air-through nonwoven fabric can be used. The planar size of the top sheet 13 is a size that protrudes from both sides in the longitudinal direction and both sides in the lateral direction of the absorbent body 11.

3B, the back sheet 15 is formed by stacking and joining two sheet members, a leak-proof sheet 15f and an exterior sheet 15n, in the thickness direction. The leak-proof sheet 15 f is a liquid-impermeable sheet member made of a polyethylene (PE) film or a polypropylene (PP) film, and is disposed on the skin side in the thickness direction of the back sheet 15. The exterior sheet 15n is a sheet member made of a nonwoven fabric or the like, and is a member that is disposed on the non-skin side in the thickness direction of the back sheet 15 and constitutes the exterior of the absorbent main body 10. However, the back sheet 15 is not limited to the above-described configuration as long as it has a certain leak-proof property. The back sheet 15 is also a flat sheet that protrudes from both sides in the longitudinal direction and both sides in the lateral direction of the absorber. Then, the top sheet 13 and the back sheet 15 are joined to each other in the thickness direction so that the substantially V-shapes at both ends in the longitudinal direction are substantially aligned, whereby the absorber is interposed between the

sheets

13 and 15. Is held.

As shown in FIGS. 3A and 3B, the leg gather portion 20 is a sheet member that is long in the longitudinal direction joined to both lateral sides of the absorbent main body 10, and when forming the diaper 1 into a pants shape, Shrinks along the leg opening HL to form a bowl-shaped leg gather. The leg gather part 20 is formed by overlapping two sheets of a first sheet 21 and a second sheet 22 made of a nonwoven fabric or the like in the thickness direction. In addition, joining of the absorbent main body 10 and the leg gather portion 20 is hot in a state where the inner end portion in the lateral direction of the leg gather portion 20 is sandwiched between the top sheet 13 and the back sheet 15 of the absorbent main body 10. This is done by bonding with a melt adhesive or the like.

As shown in FIGS. 3A and 3B, the belt portion 30 is a longitudinally long sheet member provided on both sides in the lateral direction of the leg gather portion 20, and when the diaper 1 is formed into a pants shape, A belt is formed (see FIG. 1). The belt part 30 is formed by overlapping two sheets of a first sheet 31 and a second sheet 32 made of nonwoven fabric or the like in the thickness direction.

As described above, in this embodiment, the leg gather portion 20 and the belt portion 30 are integrally formed by the side seat 40 that is one member. That is, the first sheet 21 of the leg gather portion 20 and the first sheet 31 of the belt portion 30 are constituted by one sheet member 41, and the second sheet 22 of the leg gather portion 20 and the second sheet 32 of the belt portion 30 are also one. The sheet member 42 is used. In the present embodiment, a portion of the side seat 40 that is laterally inner than the fold line FL is the leg gather portion 20, and a laterally outer portion of the fold line FL is the belt portion 30.

The leg opening HL is formed so as to straddle the fold line FL. As described above, the leg opening HL includes the leg gather notch 25 obtained by notching the first sheet 21 and the second sheet 22 of the leg gather 20, and the first sheet 31 and the second sheet 32 of the belt 30. It is formed by the belt notch part 35 which notched. The leg gather cutout portion 25 and the belt cutout portion 35 are formed in an asymmetric shape that is not line symmetric with respect to the folding line FL. Details of the shape of the leg opening HL will be described later.

Further, a leg gather elastic member 23 made of thread rubber or the like is disposed between the first sheet 21 and the second sheet 22 of the leg gather portion 20 in an elongated state, and is fixed by a hot melt adhesive or the like. ing. In FIG. 3A, two leg gather elastic members 23 are arranged at a position further inside than the lateral inner end of the leg gather notch 25 (that is, the lateral inner end of the leg opening HL). ing. The leg gather elastic member 23 gives the leg gather portion 20 elasticity in the longitudinal direction. Thereby, when forming the diaper 1 in a pants shape, the leg gather part 20 contracts along the leg opening HL, and a bowl-shaped leg gather is formed, thereby improving the fit of the wearer around the leg. be able to.

Similarly, a belt elastic member 33 made of thread rubber or the like is disposed between the first sheet 31 and the second sheet 32 of the belt portion 30 so as to extend in the longitudinal direction, and is fixed by a hot melt adhesive or the like. Yes. In FIG. 3A, a plurality of belt elastic members 33 are arranged in the lateral direction in a region further outward than the laterally outer end of the belt notch 35 (that is, the laterally outer end of the leg opening HL). Has been placed. The belt elastic member 33 imparts stretchability in the longitudinal direction to the belt portion 30. Thereby, when forming the diaper 1 in a pants shape, a contracting force along the waistline opening HB is developed over almost the entire area of the belt portion 30, and the displacement of the waistline when the diaper 1 is worn is suppressed. .

Note that the leg gather elastic member 23 and the belt elastic member 33 are arranged at positions that do not overlap each other in the thickness direction as shown in FIG. 2B. That is, when viewed from the upper side in the thickness direction, the leg gather elastic member 23 and the belt elastic member 33 are in a positional relationship such that they are alternately arranged in the lateral direction. Thereby, the area | region where the

elastic members

32 and 33 are arrange | positioned becomes easy to fit planar shape in the leg periphery opening part HL vicinity of the diaper 1 formed in the underpants type.

Furthermore, a stretchable sheet 43 formed of a stretchable nonwoven fabric or the like is provided between the sheet member 41 (21, 31) and the sheet member 42 (22, 32). The stretchable sheet 43 is a belt-like elastic sheet member wider than the width in the lateral direction of the leg opening HL as shown by the hatched portion in FIG. 3A, and has an opening having the same shape as the leg opening HL. The

sheet members

41 and 42 are fixed to the

sheet members

41 and 42 with a hot melt adhesive or the like in a state of being elongated in the longitudinal direction. Thereby, the peripheral part of the leg periphery opening part HL is reinforced by the elastic sheet 43 over the perimeter. Moreover, the fitting property in the peripheral part of the leg periphery opening part HL improves more by the shrinkage force expressed by the planar expansion-contraction sheet 43. FIG. If the elastic sheet 43 is not provided at the peripheral edge of the leg opening HL and only the thread rubber such as the leg gather elastic member 23 is provided, there is a wrinkle between the thread rubber and the thread rubber. It becomes easy to be formed, and when the diaper 1 is worn, there is a possibility that the leg opening HL may become loose, or a rubber band mark may easily remain on the skin. On the other hand, fit property can be improved by arrange | positioning the planar elastic sheet 43 in the peripheral part of the leg periphery opening part HL.

As an example of the stretchable sheet 43, a so-called gear stretching process is performed on a non-woven fabric having a substantially elastic elastomer fiber such as a polyurethane elastomer and a thermoplastic resin fiber such as a polyolefin resin. Although the nonwoven fabric which expressed the elasticity can be illustrated, it is not restricted to this at all.

Further, as shown in FIG. 3B, the laterally outer end region of the belt portion 30 is folded twice inward in the lateral direction at the first belt end fold line FLb1 and the second belt end fold line FLb2. It is fixed in the folded state with a hot melt adhesive or the like. That is, the second belt end fold line FLb2 is a portion that becomes the laterally inner end 30ei of the belt portion 30 and a portion that becomes the waistline opening HB in FIG. 2A. By setting the waist opening HB to such an end folding structure, when the diaper 1 is worn, the stress around the wearer's waist can be reduced. However, the said horizontal direction edge part area | region does not necessarily need to be made into the above folding structures.

<About production of diaper 1>
Then, the method to manufacture the diaper 1 is demonstrated easily. FIG. 4 is a diagram for explaining an example of the manufacturing process of the diaper 1.

In this example, the diaper 1 is manufactured by performing predetermined processing (S101 to S105) on the base sheet while transporting the base sheet as a material in the transport direction. Hereinafter, the conveyance direction of the sheet member is referred to as “MD direction”, and the direction orthogonal to the MD direction is referred to as “CD direction”. The MD direction is a direction along the longitudinal direction (vertical direction) of FIG. 2A, and the CD direction is a direction along the lateral direction of FIG. 2A.

The sheet members that serve as the base sheet of the diaper 1 in the first embodiment are the absorbent main body continuous sheet 10A and the side continuous sheet 40A. The absorbent main body continuous sheet 10A is a sheet member in which a plurality of absorbent main bodies 10 are continuously arranged in the longitudinal direction (longitudinal direction). That is, the absorbent main body continuous sheet 10 A is a sheet member in which a plurality of absorbent bodies 11 are sandwiched between the continuous sheet of the top sheet 13 extending in the MD direction and the continuous sheet of the back sheet 15. Similarly, the side continuous sheet 40 A is a sheet member in which the side sheets 40 that form the leg gather portion 20 and the belt portion 30 are continuously arranged in the longitudinal direction (vertical direction).

First, as shown in FIG. 4, the base sheet in which the side continuous sheet 40 A is bonded to both sides in the CD direction (lateral direction) of the absorbent main body continuous sheet 10 A is continuously conveyed in the MD direction (S 101). .

Subsequently, the leg gather cutout portion 25 and the belt cutout portion 35 serving as the leg opening HL at positions where the folding line FL is straddled on both sides of the absorbent body 11 in the CD direction (lateral direction) with respect to the conveyed base material sheet. Is formed (S102). The notch is formed using a cutter roll (not shown). 4 is a state corresponding to the diaper 1 in the unfolded state in FIG. 3A.

Subsequently, a portion corresponding to the belt portion 30 of the side continuous sheet 40A is folded back inward in the CD direction (lateral direction) by a folding line FL, and a part of the absorbent main body 10 and the leg gather portion and the belt portion 30 are joined. The state is overlapped in the thickness direction (S103).

Subsequently, the first joint portion WL1 and the second joint portion WL2 are formed by joining means such as ultrasonic fusion and thermal fusion, and the belt portion 30, the absorbent main body 10, and the leg gather portion 20 are joined ( S104). As described above, the first joint portion WL1 and the second joint portion WL2 are formed so that the inclination angles θ1 and θ2 satisfy a predetermined condition (θ1> θ2).

Subsequently, the base sheet is cut (S105). Specifically, the diaper 1 is cut for each individual from the base sheet that continues in the MD direction, and further, the four corners of the rectangle are cut along the first joint WL1 and the second joint WL2. Thereby, the diaper 1 of the planar state shown by FIG. 2A is formed.

<About the fit of diaper 1>
The diaper 1 of this embodiment has various structures so that the wearer can feel good fit when worn. In particular, by adjusting the shape of the leg opening HL, the fit of the wearer's leg retraction part is improved as compared with the conventional diaper. Hereinafter, the fitting property of the diaper 1 will be described.

FIG. 5 is a diagram illustrating the shape of the leg opening HL. In FIG. 5, the shape of the leg opening HL in an expanded state of the diaper 1 as in FIG. 3A is shown enlarged. Further, for the sake of explanation, each region of the leg opening HL is defined as follows. That is, the center position in the longitudinal direction of the leg hole opening HL is CLhl, the position of the front end of the leg hole opening HL in the longitudinal direction is HLef, and the position of the rear end in the longitudinal direction is HLer. Of the leg gather cutout portions 25 forming the leg opening HL, the region on the front side of the longitudinal center position CLhl is located on the rear side of the front leg gather cutout portion 25f and the longitudinal center position CLhl. The region is a rear leg gather cutout portion 25r. Similarly, in the belt cutout portion 35 that forms the leg opening HL, the region on the front side of the longitudinal center position CLhl is the front belt cutout portion 35f, and the region on the rear side of the longitudinal center position CLhl. Is the rear belt cutout 35r. In the present embodiment, the center position CLhl in the longitudinal direction of the leg opening HL is located on the front side in the longitudinal direction with respect to the center position CL in the longitudinal direction of the absorbent main body 10.

In the diaper 1 of the present embodiment, the leg-hole opening HL is formed so that the opening area is larger in the region on the front side in the longitudinal direction than on the region on the rear side in the longitudinal direction. In other words, the lateral width of the leg opening HL in the longitudinal front region is equal to or greater than the lateral width of the leg opening HL in the longitudinal rear region corresponding to the longitudinal front region. . In FIG. 5, the width WHLf in the lateral direction of the leg opening HL in the region on the front side in the longitudinal direction is equal to the front leg at a position h from the longitudinal front end HLef of the leg opening HL in the longitudinal direction. This is represented by the total value of the lateral width W25f of the gather cutout portion 25f and the lateral width W35f of the front belt cutout portion 35f. Similarly, the lateral width WHLr of the leg-hole opening HL in the rear-side region in the longitudinal direction is the rear distance at a position h away from the longitudinal rear end HLer of the leg-hole opening HL in the longitudinal direction. It is represented by the total value of the lateral width W25r of the side leg notch 25r and the lateral width W35r of the rear belt notch 35r. Accordingly, in the diaper 1, the leg opening HL is formed so that (W25f + W35f) ≧ (W25r + W35r).

With such a configuration, when the diaper 1 has a pant-type shape, the size of the leg opening HL is wide on the wearer's belly side (front side) and narrow on the wearer's back side (rear side). . Since the leg opening HL is wide on the abdominal side, the wearer can easily move the leg forward while wearing the diaper 1 and can easily perform an operation such as walking while wearing the diaper 1. On the other hand, the fact that the leg opening HL is narrow on the back side means that the widths of the belt part 30 and the leg gather part 20 are increased accordingly, so that the wearer's buttocks are worn by the belt part when the diaper 1 is worn. It becomes easy to cover widely by 30 grades. Thereby, the fit property in the back side (buttock side) of the leg periphery opening part HL can be made favorable.

Further, the leg gather notch 25 forming the leg opening HL has the widest lateral width in the region between the front end HLef and the rear end HLer in the longitudinal direction (vertical direction). In FIG. 5, the leg gather notch 25 draws a gentle curve that protrudes inward in the lateral direction between the front end HLef and the rear end HLer, and the lateral width W20 is the widest in the vicinity of the longitudinal center position CLhl. It has become. Therefore, the lateral width W20 of the leg gather portion 20 is the narrowest in the vicinity of the central position CLhl in the longitudinal direction. The vicinity of the center position CLhl is a region that comes into contact with the wearer's groin when the diaper 1 is worn. Accordingly, by narrowing the lateral width of the leg gather portion 20 in the vicinity of the center position CLhl, interference between the leg gather portion 20 and the wearer's groin is suppressed, improving fit and diapers. Discomfort when worn can be reduced.

Similarly, the belt notch 35 forming the leg opening HL has the widest lateral width in the region between the front end HLef and the rear end HLer in the longitudinal direction. In FIG. 5, the belt notch 35 has a gentle curve that protrudes outward in the lateral direction between the front end HLef and the rear end HLer, and the lateral width is the largest in the vicinity of the central position CLhl in the longitudinal direction. Yes. Accordingly, the lateral width W30 of the belt portion 30 is the narrowest in the vicinity of the longitudinal center position CLhl. The center position CLhl is a region where the wearer grips and pulls the belt portion 30 when the diaper 1 is in contact with the periphery of the wearer's hip bone (pelvis) and the diaper 1 is pulled upward. Therefore, by narrowing the lateral width of the belt portion 30 in the vicinity of the center position CLhl, the wearer can wear the diaper 1 by firmly grasping the belt portion 30, and fit when worn. The sex can be increased. Moreover, since the external appearance of the diaper 1 becomes closer to underwear because the width of the belt part 30 looks narrow, it is possible to reduce the hesitation and resistance of the wearer with respect to wearing the “diaper”.

Further, the lateral width W25f of the front leg gather notch 25f may be larger than the lateral width W35f of the front belt notch 35f (W25f> W35f). In this case, since the front leg gather cutout portion 25f is greatly cut out, when the wearer passes the leg through the leg opening HL in the operation of wearing the diaper 1 formed in a pants shape, It becomes difficult for a finger to get caught in the leg gather part 25, and it becomes easy to wear the diaper 1 smoothly. In addition, the leg opening HL is easily formed along the shape of the leg after the diaper 1 is worn, so that the movement of the leg is less likely to be obstructed, and a clean underwear-like appearance such as shorts and briefs is realized. can do.

While such an effect is obtained, in a disposable diaper of a type in which a leg opening is formed between the belt portion and the leg gather portion, stress is applied at the boundary portion between the leg gather portion and the belt portion due to its structure. It becomes easier to concentrate. And when an excessive stress acts on the said boundary part when wearing a diaper, there exists a possibility that a diaper may be torn as a starting point which a nonwoven fabric etc. tear. In the case of the diaper 1 of the present embodiment, the boundary between the leg gather portion 20 and the belt portion 30 is formed at the front end HLef and the rear end HLer in the longitudinal direction of the leg opening HL, and stress tends to concentrate on the portion. .

However, in the diaper 1, the leg gather portion 20 and the belt portion 30 are configured by the same sheet member (side seat 40), and no joint portion or the like is provided at the boundary portion (HLef, HLer) between the two. Even if stress concentrates on the part, the starting point of the tear is hardly formed. Therefore, when the diaper 1 is worn, problems such as the leg opening HL being torn are unlikely to occur. Further, since the stretchable sheet 43 is disposed so as to surround the leg opening HL, the periphery of the leg opening HL is reinforced by the stretchable sheet 43. Thereby, the intensity | strength of the boundary part (HLef, HLer) of the leg gather part 20 and the belt part 30 becomes high, and it is hard to be torn.

In addition, since the expansion sheet 43 is provided with an opening having the same shape as the leg opening HL, the width of the expansion sheet 43 varies depending on the position in the longitudinal direction. In FIG. 5, when comparing the lateral width of the stretchable sheet 43 in the region overlapping the leg gather portion 20, the width W43c at the longitudinal center position CLhl is the narrowest, and the width W43r at the longitudinal rear end HLer is the widest. It has become. By narrowing the width of the stretchable sheet 43 in the vicinity of the center position CLhl, which is a region that comes into contact with the groin portion of the wearer when the diaper 1 is worn, the contraction force acting on the region of the groin portion is difficult to be dispersed. Thereby, the fitting property of the leg periphery opening part HL can be improved. On the other hand, by increasing the width of the stretchable sheet 43 at the rear end HLer, which is a region covering the wearer's buttocks, the shrinkage force easily acts on a wide range in the buttocks region. Thereby, the fastening force to the wearer's skin in the buttocks is dispersed, and discomfort due to excessive fastening can be made difficult to occur.

Moreover, in the leg gather part 20 of the diaper 1, the leg gather elastic member 23 extends along the longitudinal direction so as to coexist with the stretchable sheet 43 in the region where the leg opening HL (leg gather cutout part 25) is formed. Are arranged. The distance W23c from the end of the leg opening HL at the center position CLhl in the longitudinal direction of the leg opening HL to the leg gather elastic member 23 arranged on the outermost side in the lateral direction is at least the leg opening. It is shorter than the distance W23f from the end of the leg opening HL at the front end HLef in the longitudinal direction of the HL to the leg gather elastic member 23 arranged on the outermost side in the lateral direction. In the vicinity of the center position CLhl of the leg opening HL that contacts the wearer's buttocks, the distance W23c (lateral distance) between the end of the leg opening HL and the leg gather elastic member 23 is as short as possible. By doing, it becomes difficult to produce a clearance gap between the leg periphery opening part HL and a wearer's groin part, and it becomes easy to suppress that excrement leaks outside. On the other hand, in the vicinity of the front end HLef in the longitudinal direction of the leg opening HL, the distance W23f between the end of the leg opening HL and the leg gather elastic member 23 becomes large, so the leg gather elastic member 23 (thread rubber) This makes it easier to reduce the occurrence of wrinkles and tackiness, and the appearance when wearing a diaper 1 is neat.

Moreover, in the diaper 1, it fits at the time of wear by adjusting the inclination angle of the junction part (1st junction part WL1 and 2nd junction part WL2) which joins the absorptive main body 10 and the leg gather part 20, and a belt part. Increases sex. FIG. 6A is a side view illustrating a state in which a conventional pants-type diaper is worn. FIG. 6B is a side view illustrating a state in which the diaper 1 of the first embodiment is worn.

In a conventional pant-type diaper, a joint formed on the front side (abdominal side) of the diaper (corresponding to the first joint WL1 of the present embodiment) and a joint formed on the rear side (back side) (the present embodiment) In general, it is formed symmetrically with respect to the longitudinal direction. That is, each joint part is formed so that the inclination angle with respect to the longitudinal direction of the front joint part and the inclination angle with respect to the longitudinal direction of the rear joint part are the same angle. In this case, the angle formed by the absorbent main body and the belt portion is equal in the front and rear directions in a pant-shaped state. As a result, as shown in FIG. 6A, when the diaper is worn, the rear side (back side) of the absorbent main body is likely to hang down, and a gap may easily be formed between the diaper main body and the wearer's buttocks. there were. In addition, the appearance has a rough impression on the buttock side, and the wearer can easily be aware that he is wearing a “diaper”, which may cause resistance.

On the other hand, in the diaper 1, the inclination angle θ1 with respect to the longitudinal direction of the first joint portion WL1 is adjusted to be larger than the inclination angle θ2 with respect to the longitudinal direction of the second joint portion WL2 (θ1> θ2). In this case, the angle formed between the absorbent main body and the belt portion in a state where the pants are formed is large on the front side and tends to be small on the rear side. As a result, as shown in FIG. 6B, when the diaper is worn, the rear side (back side) of the absorbent main body is pulled up to the upper part of the wearer's buttocks, and a gap is hardly generated between the wearer's buttocks and fit. Improves. In addition, it appears to be wearing underwear such as shorts and briefs on the appearance, and the buttock has a clean impression, making it difficult for the wearer to feel resistance to wearing "diapers" it can.

Moreover, as FIG. 3A shows, in the diaper 1, the edge part of the 1st junction part WL1 and the 2nd junction part WL2 does not cross | intersect the leg periphery opening part HL, respectively. In other words, a predetermined interval is provided between the first joint portion WL1 and the second joint portion WL2 and the leg opening HL. If the first joint portion WL1 (second joint portion WL2) is formed so as to intersect the leg opening HL, stress is concentrated at the intersecting portion when the diaper 1 is worn, and a starting point of the tear is formed. The leg opening HL may be easily broken. However, in the diaper 1 of the present embodiment, since the leg opening HL and the joints do not intersect with each other, the starting point of such a tear is hardly formed, and the leg opening HL is also difficult to break.

=== Second Embodiment ===
In the second embodiment, a pants-type disposable diaper 2 (hereinafter also referred to as diaper 2) in which the leg gather part 20 and the belt part 30 are formed of different members will be described. FIG. 7A is a plan view illustrating the diaper 2 in a state of being stretched along the longitudinal direction of the absorbent main body 10. FIG. 7B is a schematic cross-sectional view showing the CC cross section of FIG. 7A.

The manufacturing method of the diaper 2 is different from that of the diaper 1 of the first embodiment, but the structure of the diaper 2 is almost the same as that of the diaper 1. That is, the configurations of the absorbent main body 10, the leg gather portion 20, and the belt portion 30 are substantially the same as the configurations of the respective portions in the first embodiment. Hereinafter, differences from the diaper 1 will be described.

In the diaper 2, the leg gather portion 20 and the belt portion 30 are formed of different members. Therefore, the lateral gathering end 20 eо of the leg gather portion 20 and the lateral outer end 30 eо of the belt portion 30 are both connected. A belt lateral joining portion WL30 to be joined is formed. The belt joint portion WL30 is formed by adhesion using a hot melt adhesive or the like, but the belt lateral direction joint portion WL30 may be formed by welding.

In addition, the leg gather elastic member 24 provided in the leg gather portion 20 in the diaper 2 is arranged in a partly curved direction as shown in FIG. 7A while extending in the longitudinal direction. However, the leg gather elastic member 24 may be arranged substantially linearly along the longitudinal direction (longitudinal direction) similarly to the leg gather elastic member 23 of the diaper 1.

FIG. 8 is a diagram for explaining an example of the manufacturing process of the diaper 2. When the diaper 2 is manufactured, predetermined processing (S201 to S204) is performed on the base sheet while transporting the base sheet as a material in the transport direction (MD direction). Among these, S204 to S205 are the same as S104 to S105 of the first embodiment, and thus description thereof is omitted.

In the second embodiment, the sheet members that become the base material sheet of the diaper 2 are the absorbent main body continuous sheet 10A, the leg gather continuous sheet 20A, and the belt continuous sheet 30A. The leg gather continuous sheet 20A is a sheet member in which the leg gather portions 20 are continuously arranged in the longitudinal direction (longitudinal direction). The belt continuous sheet 30A is a sheet member in which the belt portions 30 are continuously arranged in the longitudinal direction (longitudinal direction).

When manufacturing the diaper 2, first, the sheet member in which the leg gather continuous sheet 20A is bonded to both sides of the CD of the absorbent main body continuous sheet 10A (lateral direction) and the belt continuous sheet 30A are both MD direction. The belt continuous sheet 30A is overlapped and joined from above the leg gather continuous sheet 20A (S201). As described above, the joining of the leg gather continuous sheet 20A and the belt continuous sheet 30A is performed by joining the end portions in the lateral direction using a hot-melt adhesive or the like. It is formed.

Subsequently, the leg gather cutout portion 25 and the belt cutout portion 35 as the opening HL are formed (S202). These notches are respectively formed from above and below using a cutter roll or the like. In addition, a notch is not formed in the process of S202, but a notch is formed in the leg gather continuous sheet 20A and the belt continuous sheet 30A in advance before the process of S201. The bonding portion WL30 may be formed by bonding.

Subsequently, in the step of S203, the first joint portion WL1 and the second joint portion WL2 are formed similarly to S104 of FIG. 4, and in the step of S204, the base material is cut in the same manner as S105 of FIG. In this way, the diaper 2 is manufactured.

The completed diaper 2 has substantially the same structure as the diaper 1 of the first embodiment. Accordingly, the leg opening HL formed in the diaper 2 is wide on the abdomen side (front side) of the wearer and narrowed on the back side (rear side) of the wearer as described in FIG. Thereby, the fitting property of the diaper 2 can be made favorable in the vicinity of the leg opening HL.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and it goes without saying that the present invention includes equivalents thereof.

In the above-described embodiment, the stretchable sheet 43 disposed on the peripheral edge of the leg opening HL is formed of the two sheet members (for example, the sheet members 41 and 42) constituting the leg gather portion 20 and / or the belt portion 30. Although provided in the middle, the position where the stretchable sheet 43 is provided is not limited to this. For example, the leg gather part 20 and / or the belt part 30 may be provided on the skin side in the thickness direction, or may be provided on the non-skin side.

1 diapers (absorbent articles, disposable diapers),
2 diapers (absorbent articles, disposable diapers),
10 Absorbent body, 10A Absorbent body continuous sheet,
10ef Longitudinal front end, 10er Longitudinal rear end,
11 Absorber,
13 Top sheet,
15 Back sheet, 15f Leak-proof sheet, 15n exterior sheet,
20 leg gather part, 20A leg gather continuous sheet,
20ei laterally inner end, 20eо laterally outer end,
21 first sheet, 22 second sheet, 23 leg gather elastic member,
24 leg gather elastic member, 25 leg gather notch,
25f front leg gather notch, 25r rear leg gather notch,
30 belt portion, 30A belt continuous sheet 30ei lateral inner end, 30e lateral end,
31 first sheet, 32 second sheet, 33 belt elastic member,
35 Belt notch,
35f front belt notch, 35r rear belt notch,
40 side sheet, 40A side continuous sheet,
41 sheet member, 42 sheet member, 43 elastic sheet,
HB waistline opening, HL leg opening,
CL center position, CLhl center position (leg opening HL),
FL wrapping line,
FLb1 first belt end folding line, FLb2 second belt end folding line W20 lateral width (leg gather part 20),
W25f, W25r Horizontal width (leg gather cutout 25)
W30 lateral width (belt portion 30),
W35f, W35r lateral width (belt notch 35),
W43c, W43r lateral width (expandable sheet 43),
WL1 first joint, WL2 second joint WL30 belt lateral joint,
θ1 tilt angle (front side), θ2 tilt angle (rear side)

Claims

Having a longitudinal direction, a transverse direction and a thickness direction;
In an absorbent article comprising an absorbent main body, a leg gather part, and a belt part, the absorbent article is extended along the longitudinal direction of the absorbent main body.
The leg gathers are arranged on both sides of the absorbent body in the lateral direction,
The belt portion is disposed so as to overlap with a part of the absorbent main body and the leg gather portion in the thickness direction,
A pair of leg openings are formed by notches provided in the belt part and the leg gather part,
The belt part is joined to the absorbent main body and the leg gather part at a joint part that is inclined outward in the lateral direction from both ends in the longitudinal direction toward the leg opening.
The notch portion provided in the belt portion includes a front belt notch portion on the front side and a rear belt notch portion on the rear side with respect to a center position in the longitudinal direction of the leg opening. The notch portion provided in the gather portion includes a front leg gather notch portion on the front side of the center position in the longitudinal direction, and a rear leg gather notch portion on the rear side,
The lateral width of the front belt notch and the lateral side of the front leg gather notch at a position a predetermined distance inward of the longitudinal direction from the longitudinal front end of the leg opening. The sum with the width of the direction is
The lateral width of the rear belt notch portion and the rear leg gather notch at a position separated from the rear end in the longitudinal direction of the leg opening by the predetermined distance inward of the longitudinal direction. Is equal to or greater than the sum of the horizontal widths of the parts,
An absorbent article characterized by the above.
The absorbent article according to claim 1,
The said leg gather part and the said belt part are formed of the one member, The absorbent article characterized by the above-mentioned.
The absorbent article according to claim 1 or 2,
The leg gather portion has a portion in which the lateral width is narrowest between the longitudinal front end of the leg opening and the rear end of the leg opening. Absorbent article characterized by.
The absorbent article according to any one of claims 1 to 3,
The belt portion has a portion in which the width in the lateral direction is the narrowest between a front end in the longitudinal direction of the leg-hole opening and a rear end in the longitudinal direction of the leg-hole opening. Absorbent article characterized.
The absorbent article according to any one of claims 1 to 4,
The lateral width of the front leg gather notch at a position away from the front end in the longitudinal direction of the leg opening by a predetermined distance inside the longitudinal direction,
Absorbency characterized in that it is larger than the lateral width of the front belt notch at a position away from the front end in the longitudinal direction of the leg opening by the predetermined distance inward of the longitudinal direction. Goods.
An absorbent article according to any one of claims 1 to 5,
An absorbent article, characterized in that an elastic sheet member having elasticity is disposed in a peripheral portion of the leg opening portion in a state of being stretched in the longitudinal direction.
The absorbent article according to claim 6,
The elastic sheet member disposed in a region overlapping with the leg gather portion has a width in the lateral direction at the center position in the longitudinal direction of the leg-hole opening that is behind the longitudinal direction of the leg-hole opening. An absorbent article characterized by being narrower than the lateral width at the end.
The absorbent article according to claim 6 or 7,
In the laterally inner region of the leg opening of the leg gather portion, at least a part of the elastic elastic member is disposed overlapping the elastic sheet member in a state where the thread-like elastic member is extended in the longitudinal direction. ,
The lateral distance between the end of the leg opening and the thread-like elastic member at the longitudinal center position of the leg opening is at least the leg circumference at the longitudinal front end of the leg opening. An absorbent article characterized by being smaller than the lateral distance between the end of the opening and the thread-like elastic member.
An absorbent article according to any one of claims 1 to 8,
Of the angles formed by the first joint formed on the front side in the longitudinal direction and the longitudinal direction, the smaller angle is:
An absorptive article characterized by being larger than the smaller one of the angles formed by the second joint formed on the rear side in the longitudinal direction and the longitudinal direction.
An absorbent article according to any one of claims 1 to 9,
An absorptive article, wherein a predetermined interval is provided between the joint and the leg opening.