JP2021074077A - Disposable diaper - Google Patents

Abstract

To provide a disposable diaper which can efficiently transfer a skin care agent applied on a surface sheet to a skin of a wearer.SOLUTION: A disposable diaper in the invention includes a body having an absorber, a surface sheet, and a back surface sheet. The absorber has a first flexible part which is arranged in a central part in a longitudinal direction of a crotch region, can lead valley-folding, and extends in a lateral direction and a plurality of second flexible parts which are arranged at least one of an abdominal side crotch region and a back side crotch region and extend in the lateral direction. The disposable diaper includes three-dimensional gatherings that have an expanding and contracting part, which includes a first elastic member expanding and contracting in a longitudinal direction and can rise on a skin side, and are provided on both side parts in the lateral direction of the body. The plurality of the second flexible parts are arranged in a position sandwiched between the right and left expanding and contracting parts. The body has a skin care agent arrangement region which is positioned at least in a region sandwiched between the two second flexible parts out of the plurality of the second flexible parts on the surface sheet in a plane view.SELECTED DRAWING: Figure 1

Description

The present invention relates to disposable diapers.

Conventionally, various diapers coated with skin care agents have been proposed.
For example, Patent Document 1 describes a disposable diaper in which a hydrophobic lotion is arranged on the surface of a top sheet. Further, Patent Documents 2 and 3 describe disposable diapers in which a hydrophilic lotion is arranged on the surface of a top sheet.

Japanese Patent Application Laid-Open No. 2008-522772 Special Table 2010-525862 Japanese Unexamined Patent Publication No. 2010-75733

When a disposable diaper is worn, the surface sheet (top sheet) is easily deformed due to external force caused by the wearer's legs or the expansion and contraction of three-dimensional gathers to prevent leakage of body fluids. In the disposable diapers described in Patent Documents 1 to 3, the efficiency of transfer of the skin care agent to the skin due to such deformation of the surface sheet has not been sufficiently considered.

An object of the present invention is to provide a disposable diaper capable of efficiently transferring a skin care agent applied to a surface sheet to the wearer's skin.

The disposable diaper according to one embodiment of the present invention includes a main body having an absorber, a liquid-permeable front surface sheet arranged on the skin side of the absorber, and a back surface sheet arranged on the non-skin side of the absorber. A ventral region having a vertical direction extending from the ventral side of the wearer through the crotch portion to the dorsal side and a lateral direction orthogonal to the vertical direction, and located on the ventral side in the vertical direction, and the ventral region. It is divided into a dorsal region located on the dorsal side in the vertical direction and an inseam region located between the ventral region and the dorsal region and confined inward in the lateral direction.
The absorber is
A first flexible portion extending in the lateral direction, which is arranged in the central portion in the vertical direction of the inseam region and can induce a valley fold that is convex toward the non-skin side.
In the inseam region, it is arranged in at least one of the ventral inseam region on the ventral side in the longitudinal direction from the first flexible portion or the dorsal inseam region on the dorsal side in the longitudinal direction from the first flexible portion, and the lateral side. It has a plurality of second flexible portions extending in a direction.
The disposable diaper is
It further includes a pair of left and right three-dimensional gathers provided on both sides of the main body in the horizontal direction, each of which includes a first elastic member that expands and contracts in the vertical direction and can stand up on the skin side.
The plurality of second flexible portions are arranged at positions sandwiched between the left and right telescopic portions.
The main body is located at least in a region of the front surface sheet sandwiched between two second flexible portions of the plurality of second flexible portions in a plan view seen from the thickness direction of the main body, and is used for skin care. It has a skin care agent placement area where the agent is placed.

According to the disposable diaper of the present invention, the first flexible portion and the plurality of second flexible portions form a convex shape protruding toward the skin, and at least located in the region sandwiched between the two second flexible portions. The area where the skin care agent is placed rises toward the skin. As a result, the skin care agent can be efficiently transferred to the wearer's skin.

It is a top view (developed view) which shows the disposable diaper which concerns on one Embodiment of this invention. It is sectional drawing which cut at the line II-II of FIG. It is a back view which looked at the absorbent core of the absorber of FIG. 1 from the non-skin side. In the figure, the skin care agent placement area on the surface sheet is schematically shown by hatching with diagonal lines. It is a top view (developed view) which shows the other structural example of the disposable diaper of this invention. FIG. 3 is a cross-sectional view taken along the line VV of FIG. It is a top view which shows the main part of the surface sheet 2 of FIG. 1 enlarged and schematically.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Overall composition of diapers]
As shown in the developed view of FIG. 1, the disposable diaper 1 of the present invention includes a main body M, a pair of three-dimensional gathers G, and a fastening tape F. The disposable diaper 1 is hereinafter referred to as a diaper 1.
The diaper 1 has a vertical direction X extending from the ventral side of the wearer through the crotch portion to the dorsal side, and a horizontal direction Y corresponding to the left-right direction of the wearer and orthogonal to the vertical direction X. Further, the diaper 1 has a thickness direction Z orthogonal to both the vertical direction X and the horizontal direction Y. In the present specification, with respect to the thickness direction Z, the side closer to the wearer's skin may be referred to as the upper or skin side, and the side closer to the clothing may be referred to as the lower or non-skin side when worn.
Note that FIG. 1 shows a mode in which the diaper 1 is stretched on the XY plane against the contraction force of each elastic member of the diaper 1 described later.

The main body M extends from the ventral side of the wearer to the dorsal side through the crotch along the vertical direction X, and is a liquid excrement such as urine or watery stool of the wearer (also simply referred to as “liquid”). Has a function of absorbing. In the present invention, the main body M refers to a laminate of the back surface sheet 3, the absorber 4, and the front surface sheet 2, which will be described later.

The pair of three-dimensional gathers G are configured to be able to stand up on the skin side, and are provided on both sides of the main body M in the lateral direction Y. The three-dimensional gather G includes the first elastic member 9, and when worn, stands above the thickness direction Z, that is, on the skin side of the wearer, and can prevent leakage of the liquid in the lateral direction Y. The detailed configuration of the three-dimensional gather G will be described later.

The diaper 1 is located between the ventral region A located on the ventral side of the vertical direction X, the dorsal region B located on the dorsal side of the vertical direction X, the dorsal region B and the ventral region A, and is located in the lateral direction Y. It is divided into an inseam region C having a shape constricted in the direction.
The dorsal region B includes a side portion B1 projecting outward from the inseam region C in the lateral direction Y on the left and right. A fastening tape F is provided on the side edge portion B2 of the side portion B1 in the lateral direction Y. Similarly, the ventral region A includes the lateral portion A1 protruding laterally Y outward from the inseam region C. A landing tape (not shown) for adhering the fastening tape F is provided on the non-skin side surface of the ventral region A. The dorsal region B and the ventral region A are adhered to each other by the fastening tape F at the time of wearing, and are integrally arranged around the waist and waist of the wearer.
The inseam region C is formed with leg rolls constricted inward in the lateral direction Y so as to be narrower than the dorsal region B and the ventral region A, and the crotch including the urinary part and anus of the wearer when worn. It is placed in the department.
The term "when worn" as used herein means a state in which a normally assumed proper wearing position is maintained.

The diaper 1 may further include a second elastic member 10 for forming waist gathers, which is provided in the ventral region A or the dorsal region B and expands and contracts in the lateral direction Y. The second elastic member 10 is a thread-like or band-shaped elastic member that can expand and contract in the lateral direction Y. “Expanding and contracting in the lateral direction Y” of the second elastic member 10 may be expanded and contracted in the lateral direction Y as a whole, and may be expanded and contracted in a direction including a vector component parallel to the lateral direction Y.
The second elastic member 10 is sandwiched between, for example, two sheet materials (not shown) in a state of being extended in the lateral direction Y. The second elastic member 10 is arranged together with these sheet materials in the ventral region A or the dorsal region B in a state of being extended in the lateral direction Y. In the example shown in FIG. 1, the second elastic member 10 is located at least on the left and right side portions B1 of the dorsal region B, and the left and right second elastic members 10 are separated from each other in the lateral central portion of the dorsal region B. There is. A plurality of second elastic members 10 are arranged side by side in the vertical direction X on the left and right side portions B1 of the dorsal region B, respectively.

As shown in FIG. 2, the diaper 1 includes an absorber 4, a front surface sheet 2, a back surface sheet 3, and a pair of three-dimensional gather forming sheets 5. These configurations are bonded to each other by a known bonding means such as a hot melt adhesive.

The absorber 4 extends along the longitudinal direction X and is arranged between the front surface sheet 2 and the back surface sheet 3. The absorber 4 absorbs the liquid from the surface on the surface sheet 2 side and diffuses it inside to hold the liquid.
The absorber 4 has an absorbent core 7 and a core wrap sheet 8.
The absorbent core 7 includes an upper surface 7a of the core located on the skin side and a lower surface 7b of the core located on the non-skin side, and is mainly composed of an absorbent material capable of holding a liquid. Specifically, the absorbent core 7 has a structure of hydrophilic fiber stacks, a structure in which an absorbent polymer is supported on the stacks, a structure composed of only a water-absorbent polymer, and the like.
The core wrap sheet 8 has a function of covering the absorbent core 7 and maintaining the shape of the absorbent core 7, for example. The core wrap sheet 8 is formed of, for example, tissue paper-like thin and soft paper, a liquid-permeable non-woven fabric, or the like.

The surface sheet 2 is arranged on the skin side of the absorber 4 (upper in the thickness direction Z), and constitutes, for example, the lateral Y central portion side of the skin side surface of the diaper 1. The surface sheet 2 is configured as a liquid-permeable sheet material, and is formed of a woven fabric made of synthetic fibers or natural fibers, a non-woven fabric, a porous sheet, or the like. As will be described later, the surface sheet 2 may have a plurality of convex portions 18 projecting upward in the thickness direction Z.

The back sheet 3 is arranged on the non-skin side of the absorber 4 (below Z in the thickness direction), and constitutes, for example, almost the entire non-skin side surface of the diaper 1. The back surface sheet 3 is preferably leak-proof, and is formed of, for example, a sheet material having functions such as poor liquid permeability, water vapor permeability, and water repellency. As the sheet material, for example, a porous film or the like obtained by stretching a film made of a synthetic resin such as polyethylene in which fine powder composed of a filler such as calcium carbonate is dispersed and having fine pores can be used.

The pair of three-dimensional gather forming sheets 5 are arranged on the lateral Y side portion of the surface sheet 2, and form, for example, the lateral Y side portion of the skin side surface of the diaper 1. The three-dimensional gather forming sheet 5 is formed of a sheet material having functions such as poor liquid permeability, water vapor permeability, and water repellency, which can be used as the back surface sheet 3. In the pair of three-dimensional gather forming sheets 5, the central portion side in the lateral direction Y is arranged so as to overlap the front surface sheet 2, and the lateral Y side portion extends to the outside of the front surface sheet 2 and is joined to the back surface sheet 3. The side end portion 5a on the lateral Y central portion side of the three-dimensional gather forming sheet 5 is a free end portion that is not joined to the surface sheet 2 or the like, and constitutes the three-dimensional gather G.

As shown in FIGS. 1 and 2, for example, a third elastic member 21 that expands and contracts in the vertical direction X is arranged in the vicinity of the side end portion 5b outside the lateral direction Y of the three-dimensional gather forming sheet 5. , Leg gathers that fit around the wearer's legs when worn are constructed. The third elastic member 21 is a thread-like or band-shaped elastic member that can be expanded and contracted in the vertical direction X. As shown in FIG. 2, the third elastic member 21 is sandwiched between, for example, the three-dimensional gather forming sheet 5 and the back surface sheet 3 in a state of being extended in the vertical direction X. The extension direction of the third elastic member 21 is not limited to the direction parallel to the vertical direction X, and may be a direction including a vector component parallel to the vertical direction X.

The pair of left and right three-dimensional gathers G each have an elastic portion G1 capable of standing up on the skin side. The telescopic portion G1 may extend in the vertical direction X in the inseam region C, and may extend to, for example, a part of the ventral region A and the dorsal region B. The stretchable portion G1 includes a first elastic member 9 that stretches and contracts in the vertical direction X. The first elastic member 9 is a thread-like or band-shaped elastic member that can be expanded and contracted in the vertical direction X. “Expanding and contracting in the vertical direction X” of the first elastic member 9 may be expanded and contracted in the vertical direction X as a whole, and may be expanded and contracted in a direction including a vector component parallel to the vertical direction X.

The first elastic member 9 is attached to the three-dimensional gather forming sheet 5 stretched in the XY plane in a stretched state in the vertical direction X. As shown in FIG. 2, the first elastic member 9 is arranged inside the folded-back portion where the side end portion 5a of the three-dimensional gather forming sheet 5 is folded back. As a result, when worn, the first elastic member 9 contracts in the vertical direction X, the end portion 5a is separated from the surface sheet 2 in the thickness direction Z, and a three-dimensional gather G standing up in the thickness direction Z is realized.

As shown in FIG. 1, the three-dimensional gather G further has a joint portion G2 arranged outside the vertical direction X of the expansion / contraction portion G1 and joined to the main body M side. Here, the "main body M side" means a direction with respect to the main body M as a direction for inhibiting standing with respect to the skin side on which the three-dimensional gather G stands. In the form shown in FIGS. 1 and 2, the joint portion G2 is formed on the main body M. For example, a pair of left and right joints G2 are arranged in the ventral region A and a pair of left and right joints G2 are arranged in the dorsal region B. The joint portion G2 is a region in which the side end portion 5a of the three-dimensional gather forming sheet 5 and the sheet (for example, the surface sheet 2) constituting the skin side surface of the main body M are joined by a heat seal, an adhesive, or the like. .. As a result, the elastic force of the first elastic member 9 is not exerted at the joint portion G2, and the standing of the three-dimensional gather G is suppressed.

Since the three-dimensional gather G has the expansion / contraction portion G1, the region sandwiched between the left and right expansion / contraction portions G1 is curved by the elastic force of the first elastic member 9, and unevenness is easily formed. In the present embodiment, the absorber 4 is configured as follows to facilitate the induction of the main body M into a preferable shape.

[Detailed composition of absorber]
As shown in FIG. 1, the absorber 4 is arranged in the central portion of the inseam region C in the vertical direction X, and has a first flexible portion 11 extending in the lateral direction Y. The central portion of the inseam region C in the vertical direction X means the central region when the inseam region C is divided into three equal parts in the vertical direction X. Typically, the first flexible portion 11 is formed at a position that bisects the diaper 1 in the vertical direction X. The term "extending in the lateral direction Y" in the first flexible portion 11 means that it may extend in the lateral direction Y as a whole, and includes a mode in which at least a part thereof is slightly curved or meandering.

The first flexible portion 11 can induce a valley fold that is convex toward the non-skin side. As a specific embodiment of the first flexible portion 11, at least the creases formed in the absorber 4 in the manufacturing stage, the low basis weight grooves or slits formed in the absorbent core 7, or the pressing of the absorber 4 It may be a groove formed by processing or the like. As an example, the first flexible portion 11 is configured as a folding habit formed on the entire diaper 1 at the manufacturing stage. The first flexible portion 11 only needs to be able to induce a valley fold in which the absorber 4 bends in the vertical direction X, and may extend to at least a part of the absorber 4 in the lateral direction Y.

As shown in FIG. 1, the absorber 4 further has a plurality of second flexible portions 12 extending in the lateral direction Y. The second flexible portion 12 is a ventral inseam region C1 on the ventral side of the first flexible portion 11 in the longitudinal direction X or a dorsal inseam region on the dorsal side of the first flexible portion 11 in the longitudinal direction X in the inseam region C. It is placed on at least one of C2. That is, the second flexible portion 12 may be arranged in both the ventral inseam region C1 and the dorsal inseam region C2, or may be arranged in either the ventral inseam region C1 or the dorsal inseam region C2. .. In the example shown in FIG. 1, two second flexible portions 12 are arranged in the ventral inseam region C1 and two in the dorsal inseam region C2, respectively. The term "extending in the lateral direction Y" in the second flexible portion 12 may mean extending in the lateral direction Y as a whole, and includes a mode in which at least a part thereof is slightly curved or meandering.

The second flexible portion 12 can induce a mountain fold that is convex toward the skin side or a valley fold that is convex toward the non-skin side when an external force is applied. As a specific embodiment of the second flexible portion 12, for example, a groove or slit having a low basis weight formed in the absorbent core 7, a groove formed by squeezing the absorber 4, or the like may be used. The first flexible portion 11 only needs to be able to induce a mountain fold or a valley fold such that the absorber 4 bends in the vertical direction X, and may extend to at least a part of the absorber 4 in the lateral direction Y.

The second flexible portion 12 is arranged at a position sandwiched between the left and right telescopic portions G1. That is, the second flexible portion 12 is arranged at a position where it overlaps the telescopic portion G1 in the vertical direction X in a plan view. Since a force that contracts inward in the vertical direction X acts due to the elastic force of the expansion / contraction portion G1 in the region sandwiched between the expansion / contraction portions G1, the mountain fold or valley fold of the second flexible portion 12 is likely to be induced.

[Composition of skin care agent placement area]
The main body M has a skin care agent placement region 13 in which the skin care agent is placed. In FIG. 1 and FIGS. 3 and 4 described later, the skin care agent arrangement region 13 is shown by hatching with diagonal lines. The skin care agent arrangement area 13 is an area where the skin care agent is applied on the surface sheet 2. The skin care agent placement region 13 is located on the surface sheet 2 in a region sandwiched between two second flexible portions 12 among the plurality of second flexible portions 12 in a plan view seen from the thickness direction Z of the main body M. At least located. In addition, in this specification, "plan view seen from the thickness direction Z of the main body M" is also simply referred to as "plan view". The "region sandwiched between the two second flexible portions 12 of the plurality of second flexible portions 12" is the region on the surface sheet 2 and is between the adjacent second flexible portions 12. It means a region where it is located, or a region between two second flexible portions 12 having one or a plurality of second flexible portions 12 sandwiched between them. The skin care agent placement region 13 is not limited to being located only within the region sandwiched between the two second flexible portions 12 in a plan view, and is vertically X across the two second flexible portions 12. It may extend to the outside. In the example shown in FIG. 1, the skin care agent arrangement region 13 is configured as a region extending in the vertical direction X so as to cross the four second flexible portions 12 in a plan view.

In the skin care agent arrangement region 13, the skin care agent is preferably applied to the entire region, but the skin care agent may be applied in dots or lines. The method of applying the skin care agent is not limited, and one or more methods selected from the die coater method, the slot spray method, the curtain spray method, the melt blown method, the spiral spray method, the gravure method and the bead method can be appropriately selected.

As described above, since the second flexible portion 12 is a portion that is easily bent, it can be bent so as to be convex toward the skin side or the non-skin side as the three-dimensional gather G expands and contracts in the vertical direction X. In the present invention, since the first flexible portion 11 can induce a valley fold, the second flexible portion 12 adjacent thereto can induce a mountain fold. Further, when there is a second flexible portion 12 on the outside thereof, the second flexible portion 12 can induce a valley fold. As a result of the valley folds and mountain folds being induced by the first flexible portion 11 and the second flexible portion 12, the region sandwiched between the two second flexible portions 12 tends to protrude toward the skin. Further, in the inseam region C, an external force is applied from the wearer's leg inward in the lateral direction Y to further promote the protrusion of the surface sheet 2 toward the skin side, and the surface sheet 2 is the urination portion of the wearer. And / or facilitates a good fit on the buttocks. By arranging the skin care agent in the region sandwiched between the two second flexible portions 12, the skin care agent is arranged in the portion where the surface sheet 2 sufficiently protrudes toward the skin. As a result, the skin care agent can be efficiently transferred to the skin of the urinary part and / or the buttocks of the wearer, and the skin care effect can be enhanced.

[More detailed arrangement and configuration of the second flexible shaft]
As shown in FIGS. 1 and 3, the absorbent core 7 of the absorber 4 has a ventral wide portion 14 and a dorsal wide portion 15 located on the vertical X end side, and a ventral wide portion 14 and the dorsal side. Includes a narrow portion 16 located between the wide portions 15. The ventral wide portion 14, the narrow portion 16, and the dorsal wide portion 15 are arranged along the vertical direction X. That is, the ventral wide portion 14 is located on the ventral side of the narrow portion 16, and the dorsal wide portion 15 is located on the dorsal side of the narrow portion 16. At least a part of the narrow portion 16 is located in the inseam region C, and in the example shown in FIG. 1, the entire narrow portion 16 is located in the inseam region C. The absorbent core 7 has a planar shape that is symmetrical in the lateral direction Y.

As shown in FIG. 3, the narrow portion 16 is configured to be narrower than the ventral wide portion 14 and the dorsal wide portion 15, and is wider than the width D1 of the ventral wide portion 14 and the width D3 of the dorsal wide portion 15. Also has a narrow width D2. The width D2 of the narrow portion 16 refers to the minimum width dimension in the lateral direction Y.
As an example, the narrow portion 16 has a portion having a width D2, which is the minimum width dimension, at substantially the center of the vertical direction X, and has a configuration in which the width gradually increases from the portion toward the ventral side and the dorsal side.

As shown in FIG. 1, at least a part of the ventral wide portion 14 is located in the ventral region A, and the width in the lateral direction Y is wider than that of the narrow portion 16. Similarly, at least a part of the dorsal wide portion 15 is located in the dorsal region B, and the width in the lateral direction Y is wider than that of the narrow portion 16.
As shown in FIG. 3, the ventral wide portion 14 includes a region having a constant width D1. Similarly, the dorsal wide portion 15 includes a region having a constant width D3. The width D1 of the ventral wide portion 14 and the width D3 of the dorsal wide portion 15 refer to the maximum width dimension in the lateral direction Y. The term "constant width" in a certain region means that the difference in width dimension within the region is within 20% when the minimum width in the lateral direction Y of the region is 100%. The width D1 of the ventral wide portion 14 and the width D3 of the dorsal wide portion 15 may be the same or different.
If there is no region having a constant width on both ends of the absorbent core 7 in the vertical direction, the absorbent core 7 is divided into three equal parts in the vertical direction X, and the wide portion 14 on the ventral side is divided from the ventral region. It is defined as a narrow portion 16 and a dorsal wide portion 15.

At least one of the plurality of second flexible portions 12 is arranged in the narrow portion 16. In the example shown in FIGS. 1 and 3, three of the four second flexible portions 12 are arranged in the narrow portion 16.
The narrow portion 16 is in a position where it is easily received an external force inward in the lateral direction Y by the wearer's leg. Due to this external force, the convex portion protruding toward the skin by the first flexible portion 11 and the second flexible portion 12 becomes more likely to rise, and the deformation into a shape that fits the wearer's urination portion and / or buttocks well. Can be prompted.

Further, as shown in FIG. 4, a plurality of second flexible portions 12 are arranged in both the ventral inseam region C1 and the dorsal inseam region C2, and in the narrow portion 16, the dorsal inseam region C2 May be placed more in the ventral inseam region C1. In this case, at least one of the plurality of second flexible portions 12 may be arranged in the dorsal wide portion 15.
In the example shown in FIG. 4, the absorber 4 has five second flexible portions 12, three in the ventral inseam region C1 in the narrow portion 16 and one in the dorsal inseam region C2 in the narrow portion 16. The second flexible portion 12 is arranged. Further, one second flexible portion 12 of the dorsal inseam region C2 is arranged in the dorsal wide portion 15.

Since the second flexible portion 12 is arranged more in the ventral inseam region C1 in the narrow portion 16, the bending starting point is densely arranged in the ventral inseam region C1. As a result, in the ventral inseam region C1 of the narrow portion 16, the distance between the two second flexible portions 12 becomes narrow, and when an external force in the lateral direction Y is applied from the wearer's leg, a small convex shape is formed. It becomes easy to be formed. Since the ventral inseam region C1 of the narrow portion 16 corresponds to the narrow urination portion sandwiched between the wearer's legs, the small convex shape is more likely to fit the urination portion more reliably. Further, from the ventral inseam region C1 to the ventral region A, there is a region where the second flexible portion 12 does not exist or a region where the distance between the second flexible portions 12 becomes wide, so that the convex shape is the ventral inseam region. It can be larger than C1. As a result, it is possible to promote the deformation of the surface sheet 2 so as to softly hit these regions with a shape conforming to the urination portion of the wearer and the inguinal region gradually widening from the urination portion.
On the other hand, in the dorsal inseam region C2, the second flexible portion 12 is arranged relatively sparsely in the narrow portion 16, so that when an external force in the lateral direction Y is applied from the wearer's leg, it is relatively large. The convex shape of the surface is easily formed. Further, by arranging the second flexible portion 12 also on the dorsal wide portion 15, the convex portion of the large surface can be easily fitted to the entire buttocks, and leakage of loose stool or the like from the dorsal side can be satisfactorily suppressed.
Further, an external force from the lateral direction Y is likely to be applied to the dorsal wide portion 15 by the wearer's legs or the like, and the energy of this external force is consumed by the deformation of the ventral inseam region C1 into a small convex shape. Therefore, in the dorsal wide portion 15, the influence of the external force from the outside in the lateral direction Y is suppressed, the convex shape of the large surface is easily formed stably, and the fit to the buttocks is easily improved.

As shown in FIG. 5, the second flexible portion 12 includes a groove that opens on the non-skin side of the absorber 4 and extends in the lateral direction Y. More specifically, the second flexible portion 12 includes a groove formed upward from the core lower surface 7b located on the non-skin side of the absorbent core 7. The second flexible portion 12 is preferably composed of a basis weight lower than that of the surrounding area.
The "low basis weight" of the second flexible portion 12 is a concept including a form in which the material of the absorbent core 7 is present and a form in which the material of the absorbent core 7 is not present. In the form in which the material of the absorbent core 7 is present in the second flexible portion 12, the block-shaped portions of the absorbent core 7 located on both sides thereof are connected via the second flexible portion 12, so that the absorbent core 7 is absorbent. It is more preferable because flexibility can be imparted while suppressing deformation and destruction of the core 7.

In the second flexible portion 12, since the thickness of the absorber 4 is reduced by such a groove, the rigidity is lowered as compared with the surrounding region. As a result, the second flexible portion 12 is easily deformed, and is easily bent in a convex shape toward the non-skin side or the skin side.
Further, the first flexible portion 11 can induce a convex valley fold on the non-skin side, but since the second flexible portion 12 adjacent to this can induce a convex valley fold on the non-skin side, a mountain convex on the skin side. It becomes easier to guide the fold. As a result, the convex shape that rises toward the skin side is more reliably formed by the first flexible portion 11 and the second flexible portion 12.

As shown in FIG. 1, the plurality of second flexible portions 12 are preferably separated from the end portion G3 in the vertical direction X inward of the joint portion G2 of the three-dimensional gather G by 2 cm or more inward in the vertical direction X. Have been placed. In the three-dimensional gather G, the position separated from the end portion G3 inward in the vertical direction X by 2 cm or more is the telescopic portion G1, which is sufficiently separated from the joint portion G2 and has good uprightness. The second flexible portion 12 sandwiched between the left and right telescopic portions G1 is likely to be deformed as the three-dimensional gather G expands and contracts, and is more likely to induce a convex shape toward the skin. As a result, the skin care agent placement region 13 is likely to protrude toward the skin side, and the skin care agent can be more reliably transferred to the wearer's skin.

In the diaper 1, the region sandwiched between the most ventral second flexible portion 12 and the most dorsal second flexible portion 12 and the position overlapping the vertical direction X in a plan view are located in the horizontal direction Y. It is preferable that no elastic member that expands and contracts is arranged. As a result, it is possible to prevent the region outside the lateral Y of the second flexible portion 12 from expanding and contracting in the lateral direction Y, and when an external force is applied from the wearer's leg inward in the lateral direction Y, the second is possible. It is possible to suppress the occurrence of wrinkles in the flexible portion 12. Therefore, the convex shape formed by the second flexible portion 12 can be stably formed, and the transfer of the skin care agent is further promoted.

[Structure and arrangement of the third flexible part]
As shown in FIGS. 1, 3 and 4, the absorber 4 preferably has one or more third flexible portions 17 extending in the longitudinal direction X. The third flexible portion 17 is arranged at a position where it overlaps with the skin care agent placement region 13 in a plan view, or at a position where the skin care agent placement region 13 is sandwiched from both sides in the lateral direction Y. In the example shown in FIG. 1 and the like, the third flexible portion 17 is arranged at a position overlapping the skin care agent arrangement region 13 in a plan view, and one is arranged at the center of the absorber 4 in the lateral direction Y.
The term "extending in the vertical direction X" in the third flexible portion 17 means that it may extend in the vertical direction X as a whole, and includes a mode in which at least a part of the flexible portion 17 is curved or meandering.

The third flexible portion 17 can induce a mountain fold that becomes convex toward the skin when an external force is applied. As a specific embodiment of the third flexible portion 17, for example, a recess or slit having a low basis weight formed in the absorbent core 7, or a recess formed by pressing the absorber 4 or the like may be used. The third flexible portion 17 only needs to be able to induce a mountain fold such that the absorber 4 bends in the lateral direction Y, and may extend to at least a part of the absorber 4 in the vertical direction X.

As shown in FIG. 2, the third flexible portion 17 may include, for example, a groove that opens on the non-skin side of the absorber 4 and extends in the vertical direction X. Specifically, the third flexible portion 17 includes a groove formed upward from the core lower surface 7b located on the non-skin side of the absorbent core 7, preferably having a basis weight lower than that of the surrounding region. It may be configured.

The third flexible portion 17 makes it easy for the skin care agent placement region 13 or its surroundings to be deformed. When the third flexible portion 17 cooperates with the first flexible portion 11 and the second flexible portion 12, the skin care agent placement region 13 easily protrudes toward the skin side, and the skin care agent is effective on the wearer's skin. Can be migrated to.

The third flexible portion 17 is preferably arranged as follows in relation to the second elastic member 10 for forming waist gathers.
As shown in FIG. 1, the second elastic member 10 is arranged so as not to overlap the virtual region extending the third flexible portion 17 in the vertical direction X in a plan view. That is, the virtual region is configured to pass through the gap between the left and right second elastic members 10, and the second elastic member 10 and the third flexible portion 17 do not overlap in the lateral direction Y.

In this configuration, since the regions on both sides of the third flexible portion 17 in the lateral direction Y are affected by the expansion and contraction of the second elastic member 10, it becomes easy to promote the standing of the third flexible portion 17 on the skin side. Further, the third flexible portion 17 itself is less susceptible to the influence of wrinkles and the like formed by the expansion and contraction of the second elastic member 10, and the deformability of the third flexible portion 17 can be maintained. As a result, the third flexible portion 17 can surely exert the action of raising the skin care agent arrangement region 13 toward the skin side, and the skin care agent can be more reliably transferred to the wearer's skin.

The second elastic member 10 is arranged as follows in relation to the fastening tape F.
The pair of fastening tapes F are provided on the side edge portion B2 in the lateral direction Y of the dorsal region B, and at least partially overlap with the virtual region in which the second elastic member 10 is extended in the lateral direction Y in a plan view. Arranged like this.
In this case, the second elastic member 10 is preferably arranged so as to be separated from the end portion 4a of the absorber 4 in the vertical direction X in the vertical direction X. That is, the second elastic member 10 located most inward in the vertical direction X is located outside the vertical direction X with respect to the vertical end portion 4a of the absorber 4.

When wearing a diaper, a pair of fastening tapes F are adhered to the ventral region A to form a waist portion of the diaper 1. In this case, the fastening tape F is arranged at a position where it overlaps with the second elastic member 10 in the vertical direction X, so that the second elastic member 10 is sufficiently extended in the lateral direction Y by the adhesion of the fastening tape F, and the wearer's waist. The dorsal region B and the ventral region A are well fitted around it. Further, since the second elastic member 10 is separated from the absorber 4 in the vertical direction X, the influence of the expansion and contraction of the second elastic member 10 is less likely to reach the absorber 4. As a result, the first flexible portion 11, the second flexible portion 12, and the third flexible portion 17 of the absorber 4 become the starting points of the preferable deformation as described above, and the convex shape is formed so as to fit the wearer's skin. It can be formed stably.

[Structure of core wrap sheet of absorber]
As shown in FIG. 2, the core wrap sheet 8 includes, for example, a first side edge portion 8a and a second side edge portion 8b extending in the longitudinal direction X, and is wound around an absorbent core 7 along the longitudinal direction X. It is turned. At this time, the first side edge portion 8a and the second side edge portion 8b may be arranged so as to overlap on the core lower surface 7b.
In the example shown in FIG. 2, the core wrap sheet 8 extends from the first side edge 8a located at the center of the lateral Y to the lateral Y end of the core lower surface 7b, and extends from there toward the core upper surface 7a. Further, it extends in the lateral direction Y and covers the entire upper surface 7a of the core. Further, the core wrap sheet 8 extends from the lateral Y end of the core upper surface 7a toward the core lower surface 7b, and extends laterally Y to the second side edge 8b so as to cover the core lower surface 7b. By arranging the second side edge portion 8b so as to overlap the first side edge portion 8a, the entire core upper surface 7a and core lower surface 7b can be covered with the core wrap sheet 8.

In such a configuration, since the overlapping portion of the first side edge portion 8a and the second side edge portion 8b is arranged on the core lower surface 7b, the core lower surface 7b is easily deformed so as to be pushed up toward the skin by the overlapping portion. .. As a result, the upper surface 7a of the core is also easily deformed so as to bulge toward the skin side, and the convex shape formed by the first flexible portion 11 and the second flexible portion 12 can be formed more stably. Therefore, the skin care agent arrangement area 13 can be raised toward the skin side, and the skin care agent can be more reliably transferred to the wearer's skin.

Further, the overlapping portion of the first side edge portion 8a and the second side edge portion 8b may be arranged at a position overlapping with the third flexible portion 17 in a plan view. As a result, the swelling of the third flexible portion 17 toward the skin side can be promoted more effectively, and the skin care agent placement region 13 is more likely to protrude toward the skin side.

[Composition of surface sheet]
As shown in FIG. 2, the surface sheet 2 has a plurality of convex portions 18 as described above, and these convex portions 18 are arranged as follows.
As shown in FIG. 6, the convex portion 18 includes a first convex portion 18a and a second convex portion 18b protruding toward the skin side.
The surface sheet 2 includes a first convex portion row 19a in which the first convex portions 18a are arranged along the vertical direction X, and a second convex portion row 19b in which the second convex portions 18b are arranged along the vertical direction X. Have. The second convex portion row 19b is arranged adjacent to the first convex portion row 19a in the lateral direction Y. That is, in the surface sheet 2, the first convex portion row 19a and the second convex portion row 19b are alternately arranged in the lateral direction Y.

In the second convex portion row 19b, the plurality of second convex portions 18b are arranged so as to be displaced in the vertical direction X with respect to the plurality of first convex portions 18a.
"The second convex portion 18b is arranged so as to be displaced in the vertical direction X with respect to the first convex portion 18a" means that a virtual straight line extending in the horizontal direction Y through the top of each first convex portion 18a is formed. It means a mode in which these virtual straight lines do not coincide with virtual straight lines extending in the horizontal direction Y through the top of the second convex portion 18b and extend at intervals in the vertical direction X. The tops of the first convex portion 18a and the second convex portion 18b mean the portions of the first convex portion 18a and the second convex portion 18b located on the uppermost side (skin side) in the thickness direction Z.

A plurality of recesses 20 are arranged around the first convex portion 18a and the second convex portion 18b. The recess 20 is a portion of the surface sheet 2 that is recessed downward in the thickness direction Z, and is, for example, a portion that is squeezed in the thickness direction Z by embossing. As an example, the recess 20 is formed in a substantially rectangular shape in a plan view, and is dispersedly arranged around the first convex portion 18a and the second convex portion 18b. By these recesses 20, the region surrounded by the recesses 20 projects upward, and the first convex portion 18a and the second convex portion 18b are formed.

In the concave portion 20, the thickness of the surface sheet 2 is thinner than that of the first convex portion 18a and the second convex portion 18b, so that it is likely to be a starting point of deformation. That is, the surface sheet 2 is easily deformed in the region around the first convex portion 18a and the second convex portion 18b. On the other hand, since the first convex portion 18a and the second convex portion 18b are arranged so as to be offset in the vertical direction X, the region that can be the starting point of deformation in the surface sheet 2 is not formed so as to extend linearly in the horizontal direction Y. Therefore, when the absorber 4 is mountain-folded or valley-folded by the first flexible portion 11 and the second flexible portion 12, the surface sheet 2 is not bent sharply but is bent so as to be softly curved. As a result, the main body M is easily deformed into a convex shape that is soft and hits the skin, and it is possible to suppress a feeling of discomfort due to the convex shape and improve the wearing feeling.

[Additional explanation of this embodiment]
Hereinafter, the description of this embodiment will be supplemented.

(Structure example of the second flexible part)
The width of each of the second flexible portions 12 in the vertical direction X is preferably 0.5 mm or more, more preferably 1 mm or more, from the viewpoint of more reliably promoting mountain folds or valley folds in the second flexible portion 12. It is preferably 20 mm or less, more preferably 10 mm or less.
The length of each of the second flexible portions 12 in the lateral direction Y is preferably in the lateral direction Y of the absorber 4 in the portion where the second flexible portion 12 is arranged, from the viewpoint of more reliably deforming the absorber 4. It is 1/4 or more, more preferably 1/3 or more, preferably 1 or less, and more preferably 2/3 or less of the length. From the same viewpoint, the length of each of the second flexible portions 12 in the lateral direction is preferably 20 mm or more, more preferably 30 mm or more, preferably 180 mm or less, and more preferably 130 mm or less.
The distance between the first flexible portion 12 and the second flexible portion adjacent thereto in the vertical direction X is preferably 5 mm or more, more preferably 15 mm or more, preferably 15 mm or more, from the viewpoint of forming a convex shape having a preferable width. It is 40 mm or less, more preferably 25 mm or less.
The distance between the two second flexible portions 12 in the ventral inseam region C1 in the longitudinal direction X is preferably 5 mm or more, more preferably 15 mm or more, from the viewpoint of forming a convex shape having a preferable width that fits the urination portion. It is preferably 40 mm or less, more preferably 25 mm or less.
The distance between the two second flexible portions 12 in the dorsal inseam region C2 in the longitudinal direction X is preferably 5 mm or more, more preferably 15 mm or more, from the viewpoint of forming a convex shape having a preferable width that fits the buttocks. It is preferably 40 mm or less, more preferably 25 mm or less.

(Structure example of the third flexible part)
The width of the third flexible portion 17 in the lateral direction Y is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 20 mm from the viewpoint of more reliably promoting mountain folds in the third flexible portion 17. Below, it is more preferably 10 mm or less.
The length of the third flexible portion 17 in the vertical direction X is relative to the length of the absorber 4 in the vertical direction X in the portion where the third flexible portion 17 is arranged, from the viewpoint of deforming the absorber 4 more reliably. It is preferably 1/3 or more, more preferably 1/2 or more, preferably 1 or less, more preferably 4/5 or less, and specifically preferably 30 mm or more, more preferably 100 mm or more. Yes, preferably 540 mm or less, more preferably 400 mm or less.

(Basis weight of absorbent core)
The basis weight of the absorbent core 7 excluding the second flexible portion 12 and the third flexible portion 17 is preferably 300 g / m ² or more from the viewpoint of suppressing discomfort when wearing the diaper 1 and improving the fit. It is more preferably 350 g / m ² or more, preferably 900 g / m ² or less, and further preferably 800 g / m ² or less.
When the second flexible portion 12 and the third flexible portion 17 include a groove having a low basis weight, the basis weight of the second flexible portion 12 and the third flexible portion 17 is a mountain fold in the second flexible portion 12. Alternatively, from the viewpoint of promoting valley folding, it is preferably 100 g / m ² or more, more preferably 150 g / m ² or more, preferably 500 g / m ² or less, still more preferably 400 g / m ² or less. The basis weight of the second flexible portion 12 and the third flexible portion 17 is 0 g / m ^2, which means that the material of the absorbent core 7 does not exist.

(Measuring method of basis weight of absorbent core)
The measurement target area of the absorbent core 7 is cut with a single-edged razor manufactured by Feather Co., Ltd. to obtain small pieces so as to have a predetermined area. The weight of these small pieces is measured using an electronic balance (A & D electronic balance GR-300, accuracy: 4 digits after the decimal point). The calculated weight is divided by the area of the small pieces of each part to calculate the basis weight of the small pieces. For each part, the average of the basis weight of 5 small pieces is defined as the basis weight.

(Example of configuration of skin care agent placement area)
The width of the skin care agent arrangement region 13 in the lateral direction Y is preferably 10 mm or more, more preferably 20 mm or more, preferably 50 mm or less, and more preferably 70 mm or less from the viewpoint of sufficiently transferring the skin care agent to the wearer's skin. Is.
The length of the skin care agent arrangement region 13 in the vertical direction X is preferably 100 mm or more, more preferably 150 mm or more, preferably 600 mm or less, more preferably 450 mm from the viewpoint of sufficiently transferring the skin care agent to the wearer's skin. It is as follows.

(Specific examples of skin care agents)
As the skin care agent, those having effects such as protection and healing on the wearer's skin can be used without particular limitation. For example, a preferred skin care agent includes a diamide derivative represented by the following formula (I). The diamide derivative represented by the following formula (I) is the diamide derivative of the invention described in International Publication No. WO00 / 61097, and has a medicinal effect of improving the water retention capacity and barrier function of the stratum corneum. ing. When the diamide derivative is transferred to the wearer's skin while wearing the diaper 1, it functions as an oil-based skin care agent and can suppress / improve skin irritation. When the above diamide derivative is used as a skin care agent, only one type may be used, or two or more types may be used in combination.

Further, as another skin care agent that can be arranged in the skin care agent arrangement region 13, for example, an oil-based skin care agent used as an emollient agent in the field of cosmetics can be used. Specific examples of the other skin care agents include liquid paraffin, silicone oil, animal and vegetable oils (olive oil, hooba oil, Benibana oil, squalane, squalane, etc.), monoglyceride, diglyceride, triglyceride, aliphatic ethers (myristyl-1,3- Dimethylbutyl ether, palmityl-1,3-dimethylbutyl ether, stearyl-1,3-dimethylbutyl ether, palmityl-1,3-methylpropyl ether, stearyl-1,3-methylpropyl ether, etc.), isostearyl-cholesterol ester, paraffin Wax, C _12- C ₂₂ fatty acids, C _12- C ₄₄ fatty acid ethers, C _12- C ₂₂ aliphatic alcohols, vaseline, fatty acid sorbitan esters (any of monoesters, diesters, and triesters), polyoxyethylene fatty acids Sorbitane ester (any of monoester, diester, and triester), metal stone test (magnesium stearate, etc.), sucrose fatty acid ester, cyclodextrin fatty acid ester, silicone, silicone resin, JP-A-2004-298643 Alternatively, examples thereof include an emollient agent used in the invention described in JP-A-2008-522772 and a lotion composition containing an emollient agent and an immobilizing agent.
The various skin care agents may be used alone or in combination of two or more.

From the viewpoint of not lowering the permeability of excreted body fluid on the surface sheet 2, and C ₁₂ -C ₂₂ fatty alcohol (preferably stearyl alcohol), is preferably used a mixture of diamide derivative of the above formula (I) it can. The mixing ratio of stearyl alcohol to the diamide derivative of the above formula (I) (stearyl alcohol / diamide derivative) determines the transferability of the skin care agent to the skin, the skin care effect, the feel when used, and the body fluid permeability of the surface sheet 2. From the viewpoint, it is preferably 90/10 to 50/50 (mass%). It is preferable that these mixtures are heated to increase their fluidity and then coated on the surface sheet 2 to adhere them. After adhering to the surface sheet 2, the fluidity is lowered by leaving it at room temperature so that it can be easily held by the surface sheet 2.

(Example of surface sheet configuration)
As an example, the surface sheet 2 is configured as a laminate of a first sheet arranged on the skin side and a second sheet arranged on the non-skin side. These laminates are embossed and partially joined in the recess 20 described above. As a result, the region surrounded by the concave portion 20 of the first sheet projects toward the skin side (upward), and the configuration having the above-mentioned convex portion 18 is realized. Examples of the embossing in the recess 20 include known embossing such as embossing with or without heat and ultrasonic embossing. The laminate can be produced, for example, according to the method for producing a composite sheet described in Japanese Patent Application Laid-Open No. 2015-12343.

The convex portion 18 has, for example, a hollow structure having a region containing no sheet material inside, but may have a solid structure containing the sheet material inside. In the example shown in FIG. 6, the convex portion 18 has a substantially elliptical shape whose major axis coincides with the lateral direction Y in a plan view, but various shapes can be adopted. The planar shape of the convex portion 18 can be defined by the arrangement of the concave portions 20.

Each recess 20 is dispersed and regularly arranged. Since the recess 20 is embossed as described above, the recess 20 is compacted and has high rigidity as compared with other portions. By arranging such recesses 20 in a dispersed manner, it is possible to improve the flexibility of the surface sheet 2 without continuously arranging the portions where the hardness is felt.

The first sheet and the second sheet are preferably composed of an air-through non-woven fabric or a spunbonded non-woven fabric. The first sheet on the skin side is more preferably composed of an air-through non-woven fabric. For the first sheet and the second sheet, preferably the same type of sheet material can be used from the viewpoint of increasing the bonding strength in the recess 20. The basis weight of each of the first sheet and the second sheet is preferably 10 g / m ² or more, more preferably 12 g / m ² or more, preferably 30 g / m ² or less, still more preferably 25 g / m ² or less. ..

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

For example, the absorber 4 does not have to have the third flexible portion 17. The arrangement and number of the second flexible portions 12 are also not limited to the illustrated example. Further, the absorbent core 7 may not have a narrow portion 16 and may have a substantially constant width along the vertical direction X.

In the above embodiment, an example of a deployable disposable diaper is shown as an absorbent article, but the present invention is not limited to this, and a pants-type disposable diaper or the like may be used.

1 ... Diapers (disposable diapers)
2 ... Front sheet 3 ... Back sheet 4 ... Absorber 9 ... 1st elastic member 11 ... 1st flexible part 12 ... 2nd flexible part 13 ... Skin care agent placement area M ... Main body A ... Ventral area B ... Dorsal side Area C ... Inseam area

Claims (10)

It is provided with a main body having an absorber, a liquid-permeable front sheet arranged on the skin side of the absorber, and a back sheet arranged on the non-skin side of the absorber, and passes through the crotch part from the ventral side of the wearer. A ventral region having a vertical direction extending to the dorsal side and a horizontal direction orthogonal to the vertical direction, and located on the ventral side in the vertical direction, and a dorsal region located on the dorsal side in the vertical direction. A disposable diaper that is located between the ventral region and the dorsal region and is divided into an inseam region having a shape constricted inward in the lateral direction.
The absorber is
A first flexible portion extending in the lateral direction, which is arranged in the central portion in the vertical direction of the inseam region and can induce a valley fold that is convex toward the non-skin side.
In the inseam region, it is arranged in at least one of the ventral inseam region on the ventral side in the longitudinal direction from the first flexible portion or the dorsal inseam region on the dorsal side in the longitudinal direction from the first flexible portion, and the lateral side. It has a plurality of second flexible portions extending in a direction and has a plurality of second flexible portions.
The disposable diaper is
Further provided with a pair of left and right three-dimensional gathers provided on both sides of the main body in the horizontal direction, each of which includes a first elastic member that expands and contracts in the vertical direction and can stand up on the skin side.
The plurality of second flexible portions are arranged at positions sandwiched between the left and right telescopic portions.
The main body is located at least in a region on the surface sheet sandwiched between two second flexible portions of the plurality of second flexible portions in a plan view seen from the thickness direction of the main body, and is used for skin care. A disposable diaper with a skin care agent placement area where the agent is placed. The absorber is
The ventral wide portion and the dorsal wide portion located on the vertical end side,
It has an absorbent core that is located between the ventral wide portion and the dorsal wide portion and includes the ventral wide portion and the narrow portion that is narrower in the lateral direction than the dorsal wide portion. ,
The disposable diaper according to claim 1, wherein at least one of the plurality of second flexible portions is arranged in the narrow portion. The plurality of second flexible portions are arranged in both the ventral inseam region and the dorsal inseam region, and in the narrow portion, the ventral inseam region is closer to the ventral inseam region than the dorsal inseam region. Many are placed,
The disposable diaper according to claim 2, wherein at least one second flexible portion of the plurality of second flexible portions is arranged in the wide dorsal side portion. The disposable diaper according to any one of claims 1 to 3, wherein the plurality of second flexible portions include a groove that opens on the non-skin side of the absorber and extends in the lateral direction. The pair of three-dimensional gathers
It has a joint portion that is arranged outside the telescopic portion in the vertical direction and is joined to the main body side.
The invention according to any one of claims 1 to 4, wherein the plurality of second flexible portions are arranged at a distance of 2 cm or more inward in the vertical direction from the end portion of the joint in the inward direction in the vertical direction. Disposable diapers. The absorber is
From claim 1, which has one or a plurality of third flexible portions extending in the vertical direction at a position where the skin care agent placement region overlaps the skin care agent placement region in a plan view or at a position where the skin care agent placement region is sandwiched from both sides in the horizontal direction. The disposable diaper according to any one of 5. The disposable diaper is
A second elastic member for forming waist gathers, which is provided in the ventral region or the dorsal region and expands and contracts in the lateral direction, is further provided.
The disposable diaper according to claim 6, wherein the second elastic member is arranged so as not to overlap the virtual region in which the third flexible portion is extended in the vertical direction in the plan view. The disposable diaper is
A pair of pairs of dorsal regions provided on the lateral edges of the dorsal region and arranged so that at least a part of the second elastic member overlaps with a virtual region extending in the lateral direction in the plan view. With more fastening tape
The disposable diaper according to claim 7, wherein the second elastic member is arranged apart from the end portion of the absorber in the vertical direction in the vertical direction. The absorber is
An absorbent core including an upper surface of the core located on the skin side and a lower surface of the core located on the non-skin side.
It has a core wrap sheet that includes a first side edge portion and a second side edge portion extending in the longitudinal direction and is wound around the absorbent core along the longitudinal direction.
The disposable diaper according to any one of claims 1 to 8, wherein the first side edge portion and the second side edge portion are arranged so as to overlap on the lower surface of the core. The surface sheet is
A row of first convex parts in which a plurality of first convex parts protruding toward the skin are arranged along the vertical direction, and a row of first convex parts.
A plurality of second convex portions projecting toward the skin side are arranged along the vertical direction, and are arranged adjacent to the first convex portion row in the horizontal direction, and the plurality of second convex portions are the plurality of the plurality of second convex portions. The disposable diaper according to any one of claims 1 to 9, further comprising a second convex portion row arranged with respect to the first convex portion in the vertical direction.

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