WO2018123247A1

WO2018123247A1 - Absorbent article

Info

Publication number: WO2018123247A1
Application number: PCT/JP2017/039090
Authority: WO
Inventors: 京太齋藤
Original assignee: ユニ・チャーム株式会社
Priority date: 2016-12-27
Filing date: 2017-10-30
Publication date: 2018-07-05
Also published as: JP6419768B2; TWM566061U; JP2018102704A

Abstract

Provided is an absorbent article (1) having a longitudinal direction, a lateral direction which crosses the longitudinal direction, and a front-rear direction which is perpendicular to both the longitudinal direction and the lateral direction. The absorbent article (1) is provided with a laterally extending front waist section (20), a laterally extending rear waist section (30), and a crotch section (10) which is provided between the front waist section (20) and the rear waist section (30). One lateral end (20eW1) of the front waist section (20) and one lateral end (30eW1) of the rear waist section (30) are joined at a joint section (j1). The front surface, in the front-rear direction, of the front waist section (20) is provided with a male material (50) capable of engaging with a female material (40) at the other lateral end (30eW2) of the rear waist section (30). The front waist section (20) has a laterally extending elastic region (AEL) having lateral elasticity. The elastic region (AEL) does not laterally overlap the male material (50).

Description

Absorbent articles

The present invention relates to an absorbent article such as a disposable diaper.

Conventionally, so-called tape-type diapers are known as absorbent articles that absorb excrement. Patent Document 1 discloses the technology of the tape-type diaper. On the other hand, Patent Document 2 discloses a technique of a so-called single-open pant diaper in which a tape diaper and a pant diaper are combined. That is, the diaper has a leg-hole opening on one side in the horizontal direction, but a male material and a female material of a hook-and-loop fastener are provided on the other side of the diaper. By locking the male material and the female material, a leg-hole opening is formed on the other side of the diaper, and a waist-hole opening is formed on the upper side of the diaper.

Japanese Patent Laid-Open No. 9-154485 JP 2008-104874 A

Here, when the technique described in Patent Document 1 is applied to such a single-open pants-type diaper, a single-open pants-type diaper 1 'as shown in FIG. 1 is formed.

That is, first, the single-open pants-type diaper 1 ′ has a waistline opening BH ′ on the upper side in the vertical direction intersecting the lateral direction in cooperation with the front waistline portion 20 ′ along the lateral direction and the front waistline portion 20 ′. A rear waistline portion 30 ′ along the lateral direction for forming, and a front waistline portion 20 ′ and a rear waistline portion 30 ′ while being positioned below the front waistline portion 20 ′ and the rear waistline portion 30 ′ in the vertical direction. Crotch part 10 'provided between the two. Further, the one end 20eW1 ′ in the lateral direction of the front waistline portion 20 ′ and the one end 30eW1 ′ in the lateral direction of the rear waistline portion 30 ′ are joined by the joint j1 ′, thereby Only one leg opening LH1 ′ is formed on the one side. Further, a female member 40 ′ is provided as a locking portion 40 ′ at the other end 30eW2 ′ in the lateral direction of the rear waistline portion 30 ′, and the female material 40 ′ is locked at the front waistline portion 20 ′. A possible male material 50 'is provided. In addition, the front waistline portion 20 ′ is provided with a plurality of elastic members 23 ′, 23 ′,... For imparting lateral stretchability to the front waistline portion 20 ′. The part provided with the members 23 ′, 23 ′,... Functions as a stretchable region AEL ′ having lateral stretchability.

However, in the diaper 1 ′, the stretchable region AEL ′ of the front waistline portion 20 ′ overlaps the male material 50 ′ with respect to the lateral position. Therefore, the expansion / contraction of the expansion / contraction region AEL ′ is likely to affect the male member 50 ′, that is, wrinkles along the vertical direction may occur in the male member 50 ′ in the horizontal direction. When such wrinkles occur, the area contributing to the engagement of the rear waistline 30 'with the female member 40' in the male member 50 'decreases, or the locking protrusion (not shown) of the male member 50' There is a possibility that it may face a direction different from the proper design direction, and as a result, the locking force as designed cannot be exhibited. That is, the locking force between the male member 50 'and the female member 40' can be reduced.

The present invention has been made in view of the above problems, and an object thereof is to suppress a decrease in locking force of a male member provided in a front waistline portion.

The main invention for achieving the above object is:
An absorbent article having a longitudinal direction, a transverse direction intersecting the longitudinal direction, and a longitudinal direction perpendicular to the longitudinal direction and the transverse direction,
A front waistline portion along the lateral direction;
A rear waistline portion along the lateral direction;
A crotch portion provided between the front waistline portion and the rear waistline portion,
An end portion on one side in the lateral direction in the front waistline portion and an end portion on the one side in the lateral direction in the rear waistline portion are joined at a joint portion,
The front surface in the front-rear direction of the front waistline portion is provided with a male material capable of locking the female material on the other side end in the lateral direction of the rear waistline portion,
The front waistline portion has a stretchable region having the stretchability in the lateral direction along the lateral direction,
The stretchable region is an absorbent article that does not overlap the male material with respect to the lateral position.
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, it is possible to suppress a decrease in the locking force of the male material provided in the front waistline portion.

It is a schematic perspective view of an example of a single-opening pants-type diaper 1 '. It is a schematic perspective view of the single-opening pants-type diaper 1 of the present embodiment. It is the schematic plan view which looked at the diaper 1 of the unfolding state from the wearer's non-skin side. It is BB sectional drawing in FIG. 3A. 4A to 4C are schematic explanatory diagrams of a procedure for attaching the diaper 1. It is a schematic enlarged view of the front waistline part 20 in FIG. 3A. FIG. 6A is a schematic plan view of the modified diaper 1 viewed from the non-skin side of the wearer. 6B is a cross-sectional view taken along the line BB in FIG. 6A.

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 intersecting the longitudinal direction, and a longitudinal direction perpendicular to the longitudinal direction and the transverse direction,
A front waistline portion along the lateral direction;
A rear waistline portion along the lateral direction;
A crotch portion provided between the front waistline portion and the rear waistline portion,
An end portion on one side in the lateral direction in the front waistline portion and an end portion on the one side in the lateral direction in the rear waistline portion are joined at a joint portion,
The front surface in the front-rear direction of the front waistline portion is provided with a male material capable of locking the female material on the other side end in the lateral direction of the rear waistline portion,
The front waistline portion has a stretchable region having the stretchability in the lateral direction along the lateral direction,
The stretchable region is an absorbent article that does not overlap the male material with respect to the lateral position.

According to such an absorbent article, the stretchable region of the front waistline portion does not overlap with the male material with respect to the lateral position. That is, the positions in the lateral direction are shifted from each other. Therefore, the male material is hardly affected by the expansion and contraction of the elastic member, and this can suppress the generation of wrinkles of the male material. As a result, it is possible to suppress a decrease in the locking force of the male material.

Such an absorbent article,
It is desirable that the expansion / contraction region is located on the one side portion in the lateral direction with respect to the male material in the front waistline portion.

According to such an absorbent article, the stretchable region is located in a portion on one side in the lateral direction with respect to the male material in the front waistline portion. Therefore, it is possible to ensure that the stretchable region and the male material do not overlap with respect to the lateral position.

Such an absorbent article,
The stretchable region is located on the one side with respect to the lateral center line of the crotch part,
The male member is preferably located on the other side of the center line.

According to such an absorbent article, the male material is arranged at a position away from the stretchable region in the lateral direction. Therefore, the influence which the elasticity of an expansion-contraction area | region has on a male material can be made smaller.

Such an absorbent article,
When viewed from the front-rear direction, it is desirable that the male material is provided in a portion overlapping the crotch portion in the front waistline portion.

According to such an absorbent article, the rigidity of the crotch part in addition to the rigidity of the front waistline part contributes to supplementing the rigidity of the male material. Therefore, generation | occurrence | production of the wrinkle of the said male material can be suppressed further.

Such an absorbent article,
The crotch has a liquid-absorbent absorbent core,
When viewed from the front-rear direction, it is desirable that the male material is provided in a portion overlapping the absorbent core in the front waistline portion.

According to such an absorbent article, the large rigidity of the absorbent core in the crotch also contributes to supplementing the rigidity of the male material. Therefore, generation | occurrence | production of the wrinkle of the said male material can be suppressed further.

Such an absorbent article,
The crotch portion has a liquid-absorbing absorbent core at a position on the center side in the lateral direction, and the crotch portion projects to the one side and the other side in the lateral direction from the absorbent core, respectively. Having a sheet-like portion
The sheet-like part protruding to the other side is provided with a first elastic member along the longitudinal direction for imparting the stretchability in the longitudinal direction to the sheet-like part.
It is desirable that the male material is provided at a position closer to the center in the lateral direction than the first elastic member.

According to such an absorbent article, the male material is provided at a position on the center side in the lateral direction with respect to the first elastic member, but the absorbent core is located at the position on the center side. . Therefore, wrinkles of the male material that can be caused by the vertical expansion and contraction of the first elastic member can be effectively suppressed by the rigidity of the absorbent core.

Such an absorbent article,
The crotch portion has a liquid-absorbent absorbent core at a position on the central side in the lateral direction,
When viewed from the front-rear direction, the crotch portion is a sheet for forming a three-dimensional gather at a position overlapping the absorbent core on the other side in the lateral direction from the lateral center line of the absorbent core. The second elastic member along the longitudinal direction is fixed to the sheet in a state of extending in the longitudinal direction.
It is desirable that the male material is provided at a position closer to the center in the lateral direction than the second elastic member.

According to such an absorbent article, the male material is provided at a position on the center side in the lateral direction with respect to the second elastic member, but the absorbent core is located at the position on the center side. . Therefore, wrinkles of the male material that can be caused by the expansion and contraction in the vertical direction of the second elastic member can be effectively suppressed by the rigidity of the absorbent core.

=== This Embodiment ===
The absorbent article of this embodiment is a disposable diaper 1. Moreover, the wearer of the diaper 1 is a newborn baby or an infant.
FIG. 2 is a schematic perspective view of the diaper 1.
This diaper 1 has a “vertical direction”, a “horizontal direction” orthogonal to the vertical direction, and a “front-rear direction” orthogonal to the vertical direction and the horizontal direction in a single-open pants-type state before wearing as shown in FIG. ,have. And while wearing the diaper 1, the vertical direction often faces the vertical direction. Therefore, hereinafter, the vertical direction is also referred to as “vertical direction”.
In addition, about an up-down direction, the upper side respond | corresponds to a wearer's waistline side, and the lower side respond | corresponds to a wearer's inseam side. Moreover, about the front-back direction, the front side respond | corresponds to a wearer's belly side, and the back side respond | corresponds to a wearer's back side. Furthermore, about the horizontal direction, one side respond | corresponds to a wearer's left side, and the other side respond | corresponds to a wearer's right side. In the following description, the terms “one side” and “the other side” refer to the one side and the other side in the horizontal direction.

2, the diaper 1 is located in the front waistline portion 20 along the lateral direction and the front waistline portion 20 while being positioned in the vertical direction, in cooperation with the front waistline portion 20. A rear waistline portion 30 along the lateral direction for forming a waistline opening BH on the upper side in the direction, and an absorbent main body 10 as a crotch portion provided between the front waistline portion 20 and the rear waistline portion 30. I have. And the absorptive main body 10 protrudes and is located below the front waistline part 20 and the back waistline part 30 in the vertical direction.
Further, the one end 20eW1 in the lateral direction of the front waistline portion 20 and the one end 30eW1 in the lateral direction of the rear waistline portion 30 are joined by a joint j1. As a result, the front waistline portion 20 and the rear waistline portion 30 together with the absorbent main body 10 form one leg opening LH1 at a position on one side and below in the lateral direction. Incidentally, the junction j1 is formed by welding or adhesion.
Further, a locking portion 40 that can be locked to the front surface of the front waistline portion 20 is provided at the other end 30eW2 in the lateral direction of the rear waistline portion 30. Then, as virtually indicated by a two-dot chain line in FIG. 2, the locking portion 40 is locked to the front surface of the front waistline portion 20, so that the front waistline portion 20, the rear waistline portion 30, Jointly form the waistline opening BH on the upper side, and the front waistline part 20, the rear waistline part 30, and the absorbent main body 10 together, so that the leg circumference opening LH2 is also provided at the other side and the lower position. Form one. And thereby, the said diaper 1 will be in the state worn by the wearer.

FIG. 3A is a schematic plan view of the unfolded diaper 1 as viewed from the non-skin side of the wearer. FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A.
Here, the unfolded state means that the front waistline portion 20 and the rear waistline portion 30 are formed by unbonding the above-described joint portion j1 that the diaper 1 in the single-open pants-type state in FIG. 2 has on one side in the lateral direction. It is the state which expanded the diaper 1 on the plane by separating and opening the diaper 1 longitudinally.
Moreover, in this unfolded state, the diaper 1 is shown in a virtual state in which each member constituting the diaper 1 has no elasticity. For example, in this example, the diaper 1 is provided with a plurality of

elastic members

16, 23, 33 for the purpose of imparting stretchability to the diaper 1. In this expanded state, the

elastic members

16, 23, 33 are provided. The diaper 1 is shown in a virtual state where there is no 33 stretchability (contraction force).

In the unfolded state, the diaper 1 has a longitudinal direction, a lateral direction, and a thickness direction (a direction penetrating the paper surface in FIG. 3A) as three directions orthogonal to each other. The longitudinal direction is along the above-described longitudinal direction. One side in the longitudinal direction corresponds to the ventral side, and the other side corresponds to the back side. Further, the outer side in the longitudinal direction corresponds to the upper side in the vertical direction, and the inner side in the longitudinal direction corresponds to the lower side in the vertical direction. Since the longitudinal direction and the longitudinal direction are similar to each other as described above, hereinafter, for the convenience of explanation, even in this expanded state, the longitudinal direction may be used instead of the longitudinal direction. . On the other hand, the lateral direction is synonymous with the lateral direction in the above-described single-opening pants type state. Moreover, about the thickness direction, one side respond | corresponds to the skin side which contact | connects a wearer's body, and the other side respond | corresponds to the non-skin side of the opposite side. The thickness direction is along the aforementioned front-rear direction. For this reason, in the following description, even in this expanded state, the front-rear direction may be used instead of the thickness direction for the convenience of explanation.

3A, the front waistline portion 20 is disposed along the lateral direction, and the rear waistline portion 30 is laterally spaced from the front waistline portion 20 at a predetermined interval in the longitudinal direction. Arranged along the direction. And while the absorptive main body 10 is spanned along the longitudinal direction between the front waistline part 20 and the rear waistline part 30, the longitudinal ends 10ea, 10eb of the absorptive body 10 are nearest to each other. Are joined and fixed to the

waist portions

20 and 30, so that the external shape thereof is substantially H-shaped in plan view.

The absorptive main body 10 has a substantially rectangular shape in plan view in the developed state of FIG. 3A. And the longitudinal direction of the absorptive main body 10 is distribute | arranged so that the longitudinal direction of the diaper 1 may be followed. Moreover, as shown to FIG. 3B, the absorptive main body 10 is provided with the absorber 11, the top sheet 13 provided by covering the absorber 11 from the skin side, and covering the absorber 11 from the non-skin side. The back sheet 15 is provided.

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 flexible sheet such as a nonwoven fabric. The back sheet 15 is a liquid-impermeable flexible sheet. As an example of the back sheet 15, a liquid-impermeable leak-proof sheet 15 a such as a polyethylene film or a polypropylene film and a non-woven exterior sheet 15 b bonded to the non-skin side of the leak-proof sheet 15 a are provided. A laminated sheet 15 having a two-layer structure is shown (FIG. 3B).

Note that, as shown in FIG. 3A, at least the back sheet 15 is a flat sheet that protrudes in the longitudinal and lateral directions from the absorbent core 11c. And the leg gather LG which each expands-contracts in a longitudinal direction is formed in the part protruded in the horizontal direction. That is, a plurality of

elastic members

16, 16... Such as rubber thread are fixed to the protruding portion in the longitudinal direction along the longitudinal direction. LG is formed.

The rear waistline portion 30 is a sheet member having a substantially rectangular shape in plan view made of a flexible sheet such as a nonwoven fabric as shown in FIG. 3A. In this example, as shown to FIG. 3B, the back trunk part 30 is formed by joining the

nonwoven fabrics

31 and 32 on 2 sheets. As shown in FIG. 3A, the rear waistline portion 30 is arranged so as to protrude on both sides in the lateral direction from the absorbent main body 10, while the back end portion 10 eb of the absorbent main body 10 has no skin. It is overlapped and joined from the side.

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

elastic members

33, 33..., Such as thread rubber, along the lateral direction are vertically disposed between the two

nonwoven fabrics

31, 32 associated with the rear waistline 30. The

nonwoven fabrics

31 and 32 are joined and fixed in a state of being stretched in the lateral direction while being inserted side by side in the direction. As a result, the rear waistline portion 30 is provided with lateral stretchability.

Specifically, as shown in FIG. 3A, the

elastic members

33, 33... Generally extend from one end in the horizontal direction to the other end in the vertical upper end 30 eu of the rear waistline portion 30. It is arranged continuously. On the other hand, in the rear waistline portion 30, the elastic member 33 is disposed so as to be discontinuous at a part in the lateral direction with respect to a portion 30d below the upper end portion 30eu. That is, the elastic member 33 is not disposed in the lower portion 30d that overlaps the central portion in the horizontal direction of the absorbent core 11c, but one side and the other in the horizontal direction relative to the portion 30c. Regarding the side portions 30w1 and 30w2, a plurality of elastic members 33 along the horizontal direction are arranged side by side in the vertical direction. And thereby, the elastic member 33 is arrange | positioned also in the part which overlaps with the edge part 11ce of the horizontal direction of the absorptive core 11c. However, it is not limited to this. For example, the elastic member 33 does not have to be disposed at all in a portion overlapping the absorbent core 11c in the lower portion 30d.

Further, as shown in FIG. 3A, the aforementioned locking portion 40 is joined to the other end 30eW2 in the lateral direction of the rear waistline 30 as a separate member from the rear waistline 30 by a joint j2. ing. The locking portion 40 is made of a flexible sheet such as a nonwoven fabric as in the case of the rear waistline portion 30. In the present embodiment, the two

nonwoven fabrics

41 and 42 are bonded together. And the latching | locking part 40 made from this

nonwoven fabric

41 and 42 functions as a female material in the case of the above-mentioned latching. That is, the locking portion 40 is hooked on a male material 50 of a locking target portion 50 described later of the front waistline portion 20 to lock the locking portion 40 to the front waistline portion 20. Note that the joint j2 is formed by welding or adhesion.

3A also shows a center line CL30 indicating the center position in the lateral direction of the rear waistline portion 30, and this center line CL30 is used by the wearer of FIG. 4A described later to diaper the leg ML1 on one side. It is designed to coincide with the center position CLM in the lateral direction of the wearer's body in a state where it is placed in one leg opening LH1 on one side. However, as can be seen with reference to FIG. 3A, the center line CL <b> 30 is shifted laterally with respect to the center line CL <b> 10 indicating the horizontal center position of the absorbent main body 10. In detail, although it has shifted | deviated to the other side of the horizontal direction, by doing in this way, as shown in below-mentioned FIG. When pulled to the other side, the center line CL10 of the absorbent main body 10 matches the center position CLM of the wearer's body.

On the other hand, the front waistline portion 20 is also a sheet member having a substantially rectangular shape in a plan view made of a flexible sheet such as a nonwoven fabric as shown in FIG. 3A. In this example, as shown to FIG. 3B, the front waistline part 20 is formed by joining the

nonwoven fabrics

21 and 22 on two sheets. And as shown to FIG. 3A, the said front waistline part 20 is arranged so that it may protrude on the both sides of a horizontal direction rather than the absorptive main body 10, and non-skin is provided in the abdominal side edge part 10ea in the absorptive main body 10. It is overlapped and joined from the side.

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

elastic members

23, 23... Such as thread rubber along the transverse direction are also vertically disposed between the two

non-woven fabrics

21, 22 associated with the front waistline portion 20. The

nonwoven fabrics

21 and 22 are joined and fixed in a state of being stretched in the lateral direction while being inserted side by side in the direction. As a result, the front waistline portion 20 is given lateral stretchability.

Specifically, the elastic member 23 is provided only in the portion 20 w 1 on the one side in the lateral direction from the central portion in the lateral direction of the absorbent core 11 c in the front waistline portion 20, and absorbs in the front waistline portion 20. The portion 20c corresponding to the central portion in the horizontal direction of the core 11c and the portion 20w2 on the other side in the horizontal direction from the portion 20c are not provided. Therefore, with respect to the front waistline portion 20, only the one-side portion 20w1 is given lateral stretchability, and the other-side portion 20w2 is not given stretchability.

Furthermore, the non-skin surface (corresponding to the above-described front surface in the front-rear direction) of the other-side portion 20w2 is provided with a locking target portion 50 that locks with the above-described locking portion 40. . The locking target portion 50 is a male material 50 of a hook-and-loop fastener made of, for example, resin. That is, a plurality of locking projections (not shown) are provided on the substantially rectangular non-skin side surface of the male material 50. Therefore, the locking portion 40 is locked to the locking target portion 50 when these locking projections are hooked on the fibers of the locking portion 40 formed by the

nonwoven fabrics

41 and 42 described above. Examples of the shape of the locking protrusion include a fishhook type and a mushroom type.

4A to 4C are explanatory diagrams of a procedure for attaching the diaper 1. FIG.
First, one leg ML1 in the lateral direction of a wearer such as an infant is put into the leg opening LH1 on one side of the diaper 1. And as shown to FIG. 4A, the same diaper 1 is put toward a wearer's crotch (inseam) so that the absorptive main body 10 which makes a part of the leg periphery opening LH1 may contact the buttocks ML1P of the one leg ML1. Pull up. Then, from the viewpoint of preventing leakage at the flange ML2P of the other leg ML2 in FIG. 4B, the other end 20eW2 of the front waistline portion 20 and the absorptive main body 10 abut on the flange ML2P. The engaging portion 40 of the other end 30eW2 of the rear waistline portion 30 is gripped by each hand of a wearer such as a mother and pulled to the other side in the lateral direction. Then, while pulling them, the locking portion 40 is turned around to one side and the front side, and the locking portion 40 is locked to the male member 50 of the front waistline portion 20 as shown in FIG. 4C. As a result, the leg opening LH2 on the other side is formed so as to cover the other leg ML2, and the waist opening BH is formed so as to cover the wearer's waist. And the wearing operation | work of the diaper 1 to a wearer is complete | finished.

Here, in this example, as shown in FIG. 4B, the male material 50 is provided on the front surface of the front waistline portion 20, and the rear waistline portion 30 is made of

nonwoven fabrics

41 and 42 as the locking portion 40. Female material is provided. Therefore, from the state shown in FIG. 4B to the state shown in FIG. 4C, the rear waistline portion 30 is changed from the front side to the front waistline portion 20 to lock the locking portion 40 of the rear waistline portion 30 with the female member 50 of the front waistline portion 20. When stacking, it is possible to reliably avoid damaging the wearer's skin with the male material 50. That is, even when the locking portion 40 of the rear waistline portion 30 touches the wearer's skin during the locking, the locking portion 40 is a non-woven female material. Therefore, it does not hurt the wearer's skin.

Moreover, after this mounting | wearing, the tensile force of the horizontal direction provided to the front waistline part 20 and the back waistline part 30 from each hand of a wear operator is cancelled | released, Thereby, the elastic member 23 of the

front waistline part

20, 23, and the

elastic members

33, 33, etc. of the rear waistline portion 30 contract in the lateral direction. Then, although the latching | locking part 40 is pulled to the one side of the horizontal direction, the shearing force of a horizontal direction is provided between the latching | locking part 40 and the male material 50 of the front waistline part 20 by this tension | pulling. As a result, the locking force between the locking portion 40 and the male material 50 of the front waistline portion 20 is increased, and as a result, the locking portion 40 is intentionally removed from the male material 50 of the front waistline portion 20 while the diaper 1 is worn. It is possible to effectively prevent it from coming off without it.

Further, in this example, marks M40 and M50 are provided on the locking portion 40 and the male material 50, respectively, so that the wearer can lock the locking portion 40 and the male material 50 in an appropriate design positional relationship. It has been. For example, as shown in FIG. 2 and FIG. 3A, the engagement portion 40 is provided with a mark M40, for example, as a mark M40 so as to be visible from the skin side at a substantially central position in the vertical direction on the skin side surface. Further, for example, a circular mark M50 is provided on the male material 50 as a mark M50 so as to be visible from the non-skin side. Therefore, the wearer can lock the locking portion 40 and the male member 50 in an appropriate positional relationship without any error by overlapping the circles M40 and M50.

In this example, the mark M40 of the locking portion 40 and the mark M50 of the male member 50 are made to have the same circular shape, that is, the same pattern is aligned, but this is not restrictive. For example, different symbols may be used as the marks M40 and M50. Further, the symbols M40 and M50 are not limited to circles. For example, it may be a geometric pattern such as a polygon such as a rectangle, or may be a character or an illustration.

As an example of a method of providing the mark M40 on the locking part 40, an illustration sheet (not shown) in which the mark M40 is printed on the side of the skin between the

nonwoven fabrics

41 and 42 constituting the locking part 40 is used. Insertion is mentioned. And if it does in this way, the mark M40 of an illustration sheet can be visually recognized from the skin side through the gap between the fibers of the nonwoven fabric 41. On the other hand, as an example of a method of providing the mark M50 on the male material 50, the male material 50 is formed of a transparent or translucent material, and the mark M50 is formed between the

nonwoven fabrics

21 and 22 constituting the front waistline portion 20. It is possible to insert an illustration sheet (not shown) printed on the non-skin side. And if it does in this way, the mark M50 of an illustration sheet can be visually recognized from the non-skin side through the male material 50 and the gap between the fibers of the nonwoven fabric 22.

When attention is paid to a region AM40 where the mark M40 is visually recognized in the locking portion 40 when the locking portion 40 of the rear waistline portion 30 is viewed from the skin side in the thickness direction, as shown in FIG. The vertical size of the locking portion 40 may be larger than the maximum vertical size of the male member 50 over the entire area AM40 in the horizontal direction.
And if it becomes like this, when the latching | locking part 40 is piled up and latched on the male material 50 from the front side of the male material 50, the same male material 50 will protrude from the latching | locking part 40 to the upper direction or lower side of the vertical direction. Therefore, it is easy to prevent the skin of the wearer or the wearer from being damaged by the male material 50 exposed on the upper side or the lower side after the locking.

By the way, as described at the beginning, when the wrinkles approach the male member 50, the locking force between the male member 50 and the locking portion 40 is reduced. That is, for example, when wrinkles along the vertical direction are formed in the male material 50 in the horizontal direction, the area contributing to the engagement of the male material 50 with the female material 40 that is the locking portion 40 of the rear waistline portion 30 is reduced. Otherwise, the locking protrusions of the male member 50 may face in a direction different from the proper design direction. As a result, the locking force as designed may not be exhibited.

Therefore, in the present embodiment, the male material 50 is devised so that no wrinkles come. FIG. 5 is an explanatory view of the device, and is a schematic enlarged view of the front waistline portion 20 in FIG. 3A.

As shown in FIG. 5, first, the front waistline portion 20 has a portion 20P1 provided with the

elastic members

23, 23... And a portion 20P2 not provided side by side in the horizontal direction. The former portion 20P1 is a stretchable region AEL having lateral stretchability in the front waistline portion 20, and the latter portion 20P2 is stretched in the lateral direction more than the stretchable region AEL. It is a low stretch region ANEL with low elasticity, and more correctly, it is a non-stretch region ANEL that does not have lateral stretch property.

And in this embodiment, the expansion-contraction area | region AEL of the front waistline part 20 does not overlap with the male material 50 regarding the position of a horizontal direction. Specifically, the stretchable region AEL is provided only on one side of the front waistline portion 20 in the lateral direction from the male member 50. That is, the other end AELe2 in the horizontal direction in the stretchable region AEL set so as to extend from the other side in the horizontal direction does not reach the position of the male material 50 in the horizontal direction. , Located in the non-stretchable region ANEL.

Therefore, the male material 50 is hardly affected by the expansion / contraction of the expansion / contraction region AEL, and as a result, generation of wrinkles of the male material 50 can be suppressed. And it becomes possible to suppress the fall of the locking force of the male material 50 by this.

Further, as can be seen with reference to FIG. 5, in this example, the stretchable region AEL is located on one side in the lateral direction with respect to the center line CL10 of the absorbent main body 10, but in contrast, The male material 50 is located on the other side in the lateral direction from the center line CL10. Therefore, the male material 50 is disposed at a position in the lateral direction away from the stretchable region AEL, and thereby the influence of the stretchability of the stretchable region AEL on the male material 50 can be further reduced.

Further, as shown in FIG. 5, in this example, the male material 50 is formed in the absorbent body at the front waistline portion 20 when viewed from the thickness direction (front-rear direction, the direction penetrating the paper surface in FIG. 5). 10 is provided in a portion overlapping with 10.

Therefore, in addition to the rigidity of the front waistline portion 20, the absorbent main body 10 also contributes to supplementing the rigidity of the male material 50, thereby further suppressing the generation of wrinkles in the male material 50.

Incidentally, in the example of FIG. 5, only the upper end portion 50eu of the male material 50 protrudes upward from the absorbent main body 10 and does not overlap the main body 10, but more desirably, the entire male material 50 is completely absorbent. It is preferable to overlap the main body 10.

Further, in the example of FIG. 5, the male member 50 is provided so as to overlap a portion where the absorbent core 11 c is not located in the absorbent main body 10 when viewed from the thickness direction (front-rear direction). Not limited to this. That is, the male material 50 may be provided so as to overlap the absorbent core 11c. And if it does in this way, the rigidity of the male material 50 can be supplemented also by the big rigidity of the same core 11c, Thereby, the wrinkle of the same male material 50 can be suppressed further. Incidentally, in that case, at least a part of the male material 50 may overlap the core 11c, but preferably the entire male material 50 overlaps the core 11c.

On the other hand, in this example, as described above with reference to FIG. 3A, the absorbent main body 10 has leg gathers LG and LG on one side and the other side in the lateral direction, respectively. For the purpose of forming such leg gathers LG, the sheet-like portions 10es and 10es located on the one side and the other side of the absorbent main body 10 in the lateral direction from the absorbent core 11c are elastic members along the vertical direction. 16 is provided. Here, when the above-mentioned center line CL10 of the absorbent main body 10 shown in FIG. 3A is defined as the center in the horizontal direction, the elastic member is preferably located in the sheet-like portion 10es on the other side in the horizontal direction. It is preferable that the male member 50 is provided at a position closer to the center in the lateral direction than 16 (corresponding to the first elastic member). Specifically, it is preferable that the male member 50 is located closer to the center than the elastic member 16 located closest to the center in the lateral direction among the

elastic members

16 and 16 of the sheet-like portion 10es.

And if it becomes like this, the absorptive core 11c is located in the position of this center side. Therefore, the absorptive core 11c can receive the contraction force related to the expansion and contraction of the elastic member 16. Thereby, wrinkles of the male material 50 that may be caused by the vertical expansion and contraction of the elastic member 16 can be effectively suppressed by the rigidity of the absorbent core 11c.

=== Modification ===
6A and 6B are schematic explanatory views of a modification of the present embodiment. 6A is a schematic plan view of the unfolded diaper 1a as seen from the non-skin side of the wearer, and FIG. 6B is a cross-sectional view taken along line BB in FIG. 6A.

In the above-described embodiment, the absorbent main body 10 does not have a so-called three-dimensional gather LSG for preventing side leakage. However, in this modification, the absorbent main body 10 absorbs when viewed from the thickness direction (front-rear direction). The main difference is that the three-dimensional gather LSG is provided at a lateral position that overlaps the absorbent core 11c in the sex main body 10. The points other than this are substantially the same as those of the above-described embodiment. Therefore, in the following, this difference will be mainly described, and the same components as those in the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6B, in this example, the three-dimensional gather LSG is formed using the exterior sheet 15b of the back sheet 15. That is, the exterior sheet 15b is a sheet having a size protruding to one side and the other side in the lateral direction from the leak-proof sheet 15a of the back sheet 15. Then, the protruding portion 15bf is folded back to the center side of the absorbent body 10 in the lateral direction with the position forming the lateral end 10es of the absorbent body 10 being the folded position, and in the longitudinal direction near the folded position. An elastic member 16 such as a rubber thread is fixed in a longitudinal direction along (the direction penetrating the paper surface in FIG. 6B), whereby the aforementioned leg gather LG is first formed. The folded portion 15bg further extends toward the center in the lateral direction, and is joined to the top sheet 13 at a position covering the lateral end 11ce of the absorbent core 11c or in the vicinity thereof. The portion joined to the top sheet 13 functions as the base end portion LSGb of the three-dimensional gather LSG, that is, the portion on the tip side in the lateral direction further than the base end portion LSGb serves as the free end portion LSGf. 13 can stand up. In addition, an elastic member 18 such as rubber thread is fixed to the front end portion of the free end portion LSGf in the longitudinal direction under extension. Further, as shown in FIG. 6A, both end portions LSGfea and LSGfeb in the longitudinal direction of the free end portion LSGf are fixed with an adhesive in a state where they are faced down to the top sheet 13, respectively. LSGfea and LSGfeb cannot stand up. As a result, a contraction force in the longitudinal direction is applied to the free end portion LSGf from the elastic member 18, and as a result, the free end portion LSGf contracts in the longitudinal direction while forming a plurality of wrinkles. As a result, the free end portion LSGf functions as a three-dimensional gather LSG.

Here, similarly to the description in the above-described embodiment, when the above-described center line CL10 of the absorbent main body 10 illustrated in FIG. 6A is defined as the center in the horizontal direction, in this modification, the other side in the horizontal direction. The male member 50 is provided at a position on the center side in the lateral direction with respect to the elastic member 18 (corresponding to the second elastic member) of the three-dimensional gather LSG located in the center. Specifically, the male member 50 is located at a position closer to the center than the elastic member 18 located on the most lateral side of the

elastic members

18 and 18 related to the other-side solid gather LSG. And the centerline CL10 of the absorptive core 11c is located in the position of this center side. Therefore, the absorptive core 11c can receive the contraction force related to the expansion and contraction of the elastic member 18. And thereby, it becomes possible to effectively suppress the wrinkles of the male material that may be caused by the vertical expansion and contraction of the elastic member 18 by the rigidity of the absorbent core 11c.

=== 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, as illustrated in FIG. 3A, the female material made of the

nonwoven fabrics

41 and 42 is illustrated as the locking portion 40 of the rear waistline portion 30, but the present invention is not limited thereto. That is, a so-called hook-and-loop female member having a plurality of loops protruding on one side may be used.

In the above embodiment, as shown in FIG. 3A, a so-called three-piece type disposable diaper 1 is illustrated as an example of an absorbent article. That is, in the diaper 1, the front waistline portion 20, the rear waistline portion 30, and the absorbent main body 10 that is the crotch portion are separate members, but the invention is not limited thereto. For example, a so-called two-piece having an exterior sheet in which a rear waistline part and a front waistline part are integrated via a crotch as a first part and an absorbent main body 10 fixed to the skin side surface of the exterior sheet as a second part. It may be a disposable disposable diaper.

In the above embodiment, the rubber thread is illustrated as an example of the

elastic members

16, 23, and 33, but the present invention is not limited thereto. For example, you may use the sheet | seat in which the elasticity itself was expressed in raw materials, such as a nonwoven fabric and a film, as the

elastic members

16,23,33.

In the above-described embodiment, the elasticity of the stretchable area AEL in the front waistline portion 20 is provided by the elastic member 23, but this is not a limitation. For example, you may use the nonwoven fabric which can express a stretching property partially in the horizontal direction for one or both of the

nonwoven fabrics

21 and 22 which comprise the front waistline part 20, and, thereby, omitting said elastic member 23. Or it can be reduced.

1 disposable diaper (absorbent article), 1a disposable diaper (absorbent article),
10 Absorbent body (inseam), 10ea end, 10eb end,
10es end (sheet-like part),
11 Absorber, 11c Absorbent core, 11ce end,
13 Top sheet,
15 Back sheet, 15a Leak-proof sheet, 15b Exterior sheet,
15bf protruding part, 15bg folded part,
16 elastic member (first elastic member), 18 elastic member (second elastic member),
20 Front waistline,
20eW1 one end,
20eW2 end on the other side,
20c part, 20w1 part on one side, 20w2 part on the other side,
20P1 part, 20P2 part,
21 Nonwoven fabric, 22 Nonwoven fabric, 23 Elastic member,
30 Rear waistline,
30eW1 one end,
30eW2 The other end,
30eu upper end, 30d lower part,
30c part, 30w1 part on one side, 30w2 part on the other side,
31 Nonwoven fabric, 32 Nonwoven fabric, 33 Elastic member,
40 female material (locking part), 41 non-woven fabric, 42 non-woven fabric,
50 male material (part to be locked), 50eu upper end,
BH waistline opening, LH1 leg opening, LH2 leg opening,
LG Leg Gather,
j1 junction, j2 junction,
CL10 center line, CL30 center line, CLM center position,
LSG solid gather, LSGb base end, LSGf free end,
LSGfea end, LSGfeb end,
M40 circle (mark), M50 circle (mark),
AEL stretchable area, AELe end, ANEL non-stretchable area (low stretchable area),
AM40 area,
ML1 leg, ML2 leg, ML1P buttocks, ML2P buttocks,

Claims

An absorbent article having a longitudinal direction, a transverse direction intersecting the longitudinal direction, and a longitudinal direction perpendicular to the longitudinal direction and the transverse direction,
A front waistline portion along the lateral direction;
A rear waistline portion along the lateral direction;
A crotch portion provided between the front waistline portion and the rear waistline portion,
An end portion on one side in the lateral direction in the front waistline portion and an end portion on the one side in the lateral direction in the rear waistline portion are joined at a joint portion,
The front surface in the front-rear direction of the front waistline portion is provided with a male material capable of locking the female material on the other side end in the lateral direction of the rear waistline portion,
The front waistline portion has a stretchable region having the stretchability in the lateral direction along the lateral direction,
The absorbent article, wherein the stretchable region does not overlap the male material with respect to the position in the lateral direction.
The absorbent article according to claim 1,
The absorbent article according to any one of claims 1 to 4,
The absorbent article is characterized in that the stretchable region is located on the one side in the lateral direction with respect to the male material in the front waistline portion.
The absorbent article according to claim 1 or 2,
The stretchable region is located on the one side with respect to the lateral center line of the crotch part,
The said male material is located in the said other side rather than the said centerline, The absorbent article characterized by the above-mentioned.
The absorbent article according to any one of claims 1 to 3,
The absorbent article, wherein the male material is provided in a portion of the front waistline portion that overlaps the crotch portion when viewed from the front-rear direction.
The absorbent article according to any one of claims 1 to 4,
The crotch has a liquid-absorbent absorbent core,
The absorbent article, wherein the male material is provided in a portion overlapping the absorbent core in the front waistline portion when viewed from the front-rear direction.
The absorbent article according to any one of claims 1 to 5,
The crotch portion has a liquid-absorbing absorbent core at a position on the center side in the lateral direction, and the crotch portion projects to the one side and the other side in the lateral direction from the absorbent core, respectively. Having a sheet-like portion
The sheet-like part protruding to the other side is provided with a first elastic member along the longitudinal direction for imparting the stretchability in the longitudinal direction to the sheet-like part.
The absorbent article, wherein the male material is provided at a position closer to the center side in the lateral direction than the first elastic member.
The absorbent article according to any one of claims 1 to 6,
The crotch portion has a liquid-absorbent absorbent core at a position on the central side in the lateral direction,
When viewed from the front-rear direction, the crotch portion is a sheet for forming a three-dimensional gather at a position overlapping the absorbent core on the other side in the lateral direction from the lateral center line of the absorbent core. The second elastic member along the longitudinal direction is fixed to the sheet in a state of extending in the longitudinal direction.
The absorbent article, wherein the male material is provided at a position closer to the center in the lateral direction than the second elastic member.