TW201626967A - Disposable diaper - Google Patents

Abstract

The present invention is a disposable diaper (1) provided with a liquid-permeable layer (2), a liquid-impermeable layer (3), and an absorbent layer (4). The disposable diaper is characterized in that: the disposable diaper (1) is provided, at least in the absorbent layer (4), with a first fold-inducing line (6) and a second fold-inducing line (7), each of which has a curved shape that protrudes from one side edge (5a) or the other side edge (5b) toward a longitudinal axis line (LA); the first fold-inducing line (6) and the second fold-inducing line (7) have respective prescribed front end (FE)-side first base points (15a and 15b) and prescribed rear end (RE)-side second base points (16a and 16b); the first fold-inducing line (6) and the second fold-inducing line (7) are formed by compressing at least the absorbent layer (4); and the disposable diaper (1) has absorbent layer (4) between the one side edge (5a) and the first fold-inducing line (6), between the first fold-inducing line (6) and the second fold-inducing line (7), and between the other side edge (5b) and the second fold-inducing line (7).

Description

Disposable disposable diaper

The present invention relates to disposable diapers.

The disposable diaper is variously modified in order to prevent leakage of excrement and achieve good wearing comfort.

For example, FIG. 5 of Patent Document 1 discloses an absorbent core 34 including a bellows type center absorber 34A and a pair of side absorbers 34B and 34B symmetrically provided on both sides of the center absorber 34A. . In the absorbent core 34, between the center absorbent body 34A and the pair of side absorbent bodies 34B and 34B, cut-away portions 34C and 34C each having a shape that is pierced are formed.

According to Patent Document 1, it is described that when the absorbent core 34 has the cut-away portion 34C, both side edges of the absorbent core 34 are easily erected, and when the absorbent core 34 is pressed in the width direction, the absorbent core 34 is used. Since the width of the whole is narrowed, the shrinkage in the width direction of the outer covering 2 is not easily hindered.

[prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-131968

However, the disposable diaper described in Patent Document 1 has a right and left curve along the wearer's body because it is bent in the width direction, but the disposable diaper described in Patent Document 1 is not worn along. The body's body is designed before and after the curve.

Accordingly, it is an object of the present invention to provide a disposable diaper that is draped along the wearer's body in a three-dimensional shape.

The inventors of the present invention have developed a disposable diaper having a liquid permeable layer, a liquid impermeable layer, and one side edge, the other side edge, a long axis, and a front end therebetween. And the absorbent layer at the rear end, wherein the disposable diaper has at least the first bending inducing line and the second bending inducing line in the absorbent layer, and the first bending inducing line and the second bending inducing line have The first bending inducing line and the second bending inducing line respectively have a first base point on the distal end side and the rear end, respectively, in a curved shape that protrudes toward the long axis from the side edge of the one side and the other side edge The second base point on the side, the first bending inducing line and the second bending inducing line approach the long axis as approaching the first base point in the direction from the front end toward the rear end, and are away from the first base point , the distance from the long axis is not changed or is away from the long axis, the first bending inducement line and the first The bending-inducing line is close to the long axis or does not change the distance from the long axis as it approaches the second base point in the direction from the front end toward the rear end, and is longer from the second base point. The first bending inducing line and the second bending inducing line are formed by at least compressing the absorption layer, and the disposable diaper is attached to the side edge and the first bending inducing line of the one side. The absorption layer is provided between the first bending inducing line and the second bending inducing line, and between the other side edge and the second bending inducing line.

The disposable diaper of the present invention is worn in a three-dimensional shape along the wearer's body.

1‧‧‧Disposable disposable diapers

2‧‧‧liquid permeable layer

3‧‧‧ liquid-impermeable layer

4‧‧‧Absorbent layer

4a‧‧‧ core cladding

5a‧‧‧ side of the side

5b‧‧‧ the other side

6‧‧‧1st bend induction line

6'‧‧‧ starting point

6" ‧ ‧ end

7‧‧‧2nd bend induction line

7'‧‧‧ starting point

7" ‧ ‧ end

8‧‧‧3rd bend induction line

9‧‧‧4th bend induction line

10‧‧‧ 蹊 抵 抵 area

11‧‧‧The area around the groin

12‧‧‧About the shape of the quadrangular frustum

15a, 15b‧‧‧1st base point

16a, 16b‧‧‧2nd base point

21‧‧‧1st elastic member

22‧‧‧2nd elastic member

23, 24‧‧ ‧ gap

25‧‧‧Three-dimensional wrinkles

25a‧‧‧Free end

25b‧‧‧ fixed end

26‧‧‧Flexible components

27‧‧‧Buckle belt

28‧‧‧Low basis weight area

29‧‧‧Depression

30‧‧‧ embossing department

31‧‧‧ Fixed Department

61, 62‧‧ ‧ waist forming members

63‧‧‧Repeating parts

64‧‧‧foot opening

FE‧‧‧ front end

RE‧‧‧ backend

F‧‧‧Predecessor

R‧‧‧Back body

FW‧‧ front waist area

FC‧‧‧ front and rear area

RW‧‧‧After Waist Area

RC‧‧‧After the cadre area

LA‧‧‧ long axis

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a disposable diaper 1 according to an embodiment of the present invention.

Fig. 2 is a plan view showing the unfolded state of the disposable diaper 1 shown in Fig. 1.

3 is a plan view of the absorbent layer 4 of the disposable disposable diaper 1 shown in FIG. 2, the core cladding layer 4a covering the absorbent layer 4, and the first elastic member 21 and the second elastic member 22.

Figure 4 is an end view of the IV-IV end face of Figure 2.

Figure 5 is an end view of the V-V end face of Figure 3.

Fig. 6 is an explanatory view for explaining the low basis weight regions 28a and 28b.

Fig. 7 is a view showing the wearing state of the disposable diaper 1 shown in Fig. 1.

Fig. 8 is an explanatory view for explaining a waist region and a crotch region of a disposable diaper for a belt type.

〔definition〕

Explain the definition of the terms used in this manual.

[front end and back end]

In the present specification, the "front end" and the "rear end" of the absorbent layer refer to the end portion of the absorbent layer in the abdominal direction and the end portion of the absorbent layer in the back direction, respectively, based on the wearer.

[predecessor and back body]

In the present specification, the "predecessor" and "rear body" are used in the longitudinal direction of the disposable diaper by the straight line extending in the width direction of the disposable diaper after use. The accessories on the front side and the accessories on the rear side of the second division.

[waist area and ankle area]

In this manual, "waist area" and "ankle area" have the following meaning.

(1) disposable diapers for shorts

In the shorts type disposable diaper, the waist region is composed of a front waistline region in which the front body piece is present and a back waistline region in which the back body piece is present.

The front waistline region refers to a region in which the pair of joint portions of the front body piece and the back body piece are sandwiched in the front body piece, and the rear waist area refers to a region in which the pair of joint portions are sandwiched among the back body pieces.

Moreover, in the case of a shorts-type disposable diaper, the crotch region refers to a region between the front waist region and the rear waist region, and is composed of a front crotch region where the front piece is present and a crotch region where the back body piece is present. . The crotch region is equivalent to a region sandwiched by a pair of foot opening portions (symbol 64 in Fig. 8).

(2) disposable diapers

In the belt-type disposable diaper, as shown in Fig. 8, in a predetermined fixing region 27b for the fastening tape, the front end 27a of the pair of fastening tapes 27 is fixed to be adjacent to each other, and the waist circumference is partitioned. Regional and ankle areas.

Specifically, the waist area (FW+RW) is in a state of being fixed as described above, and in the disposable diaper 1, the waist forming member 61 of the front piece F and the waist forming member 62 of the back piece R are repeatedly formed. The pair of overlapping portions 63 is judged as a reference. The front waistline region FW refers to a region between the pair of repeating portions 63 of the front body sheet F of the disposable diaper 1. Similarly, the back waist area RW means that it is discarded after use. The area between the pair of repeating portions 63 of the back body piece R of the diaper 1.

The crotch region (FC+RC) refers to a region between the front waist region FW and the rear waist region RW, and is composed of a front crotch region FC in which the front body F is present and a crotch region RC in which the back body R is present.

The disposable diapers of the present invention are used in the drawings as needed, and are described in detail below.

FIG. 1 to FIG. 5 and FIG. 7 are explanatory views for explaining the disposable disposable diaper 1 according to one embodiment of the present invention (hereinafter sometimes referred to as "the first embodiment"). Specifically, FIG. 1 is a disposable diaper 1 according to the first embodiment, and the first bending inducing line 6, the second bending inducing line 7, the third bending inducing line 8, and the fourth The bending induction line 9 is a perspective view of a state in which the wearer side (the liquid permeable layer 2 side) is bent in a worn state. Fig. 2 is a plan view showing the extended state of the disposable diaper 1 shown in Fig. 1.

3 is a plan view of the absorbent layer 4 of the disposable disposable diaper 1 shown in FIG. 2, the core cladding layer 4a covering the absorbent layer 4, and the first elastic member 21 and the second elastic member 22. 4 is an end view of the IV-IV end face of FIG. 2, and FIG. 5 is an end view of the V-V end face of FIG. Further, Fig. 7 is a schematic view showing the wearing state of the disposable diaper 1 shown in Fig. 1.

Further, in the first embodiment, the disposable diaper 1 includes a pair of three-dimensional gathers 25 including an elastic member 26a, an elastic member 26b, a fastening tape 27, and the like.

In the first embodiment, the disposable diaper 1 includes a liquid permeable layer 2 as a top sheet, a liquid-impermeable layer 3 as a back sheet, and a liquid-permeable layer 2 and a liquid-impermeable layer 3; The absorption layer 4 between.

The disposable diaper 1 is divided into a front piece F and a back piece R, and the front piece F is further divided into a front waist area FW and a front crotch area FC, and the back piece R is further divided into a rear waistline. Area RW and rear crotch area RC.

In the first embodiment, the disposable diaper 1 is provided with the first bending inducing line 6 in the liquid permeable layer 2 and the absorbing layer 4, and the first bending inducing line 6 has a length from one side edge 5a to the long side. The second axis bending induction line 7 is provided in a curved shape in which the axis line LA protrudes, and the second bending inducing line 7 has a curved shape that protrudes from the other side edge 5b toward the long axis LA.

The disposable diaper of the present invention has the first bending inducing line and the second bending inducing line, and the disposable folding diaper has the first bending inducing line and the second bending inducing line as the base axis. In the longitudinal direction of the disposable diaper and on the wearer's side, it is easy to bend in an extremely beautiful state (a state in which wrinkles and the like are small).

In the disposable diaper of the present invention, the first bending inducing line and the second bending inducing line have a curved shape, and if the front crotch region is pinched by the wearer's feet, the disposable diaper is used. In other words, the first bending inducing line and the second bending inducing line are used as the base axis, and the wearer side is bent in the width direction of the disposable diaper. Then, disposable diapers When the first bending inducing line and the second bending inducing line are bent as the base axis, both ends of the disposable diaper are erected in the longitudinal direction, and then the disposable diaper is easily worn along the wearer's The three-dimensional shape of the body. According to the same principle as the stereoscopic picture book.

Further, in the present specification, the curved shape is not limited to an arc shape, and the curved shape may have a protruding portion, a depressed portion, or the like.

The first bending inducing line 6 has a first base point 15a on the distal end FE side of the second base point 16a and a second base point 16a on the rear end RE side than the first base point 15a, and the second bending inducing line has The first base point 15b on the front end FE side and the second base point 16b on the rear end RE side than the first base point 15b are formed from the second base point 16b.

The first bending inducing line 6 approaches the long axis LA as it approaches the first base point 15a in the direction D from the front end FE toward the rear end RE, and the distance from the long axis LA does not change as it moves away from the first base point 15a. . Similarly, the second bending induction line 7 approaches the long axis LA as it approaches the first base point 15b in the direction D from the front end FE toward the rear end RE, and the distance from the long axis LA as it moves away from the first base point 15b. will not change.

Therefore, the disposable diaper of the present invention is worn at the first base point of the first bending inducing line and the first base point of the second bending inducing line, in the longitudinal direction of the disposable diaper. The side is easily bent (it is easy to have a third bending inducing line to be described later).

The first bending inducing line 6 approaches the long axis LA as it approaches the second base point 16a in the direction D from the front end FE toward the rear end RE, and moves away from the long axis LA as moving away from the second base point 16a. Similarly, the second The bending induction line 7 approaches the long axis LA as it approaches the second base point 16b in the direction D from the front end FE toward the rear end RE, and moves away from the long axis LA as moving away from the second base point 16b.

Therefore, the disposable diaper of the present invention is worn at the second base point of the first bending inducing line and the second base point of the second bending inducing line, and is worn in the longitudinal direction of the disposable diaper. The side is easily bent (it is easy to have a fourth bending inducing line to be described later).

In the first embodiment, the starting point 6' on the distal end FE side of one side edge 5a of the first bending inducing line 6 is the front waistline region FW, and the other side edge of the second bending inducing line 7 The starting point 7' on the front end FE side of 5b is the front waistline area FW.

In the disposable diaper of the present invention, the start point of the distal end side of the two intersection points of the first bending inducing line and one side edge, and the second bending inducing line and the other side edge are two The starting point on the distal end side of the intersection point is a front waistline region, and the disposable diaper easily has a three-dimensional shape along the groin portion of the wearer (it is easy to have a squirrel abutment region to be described later).

According to the disposable diaper according to another embodiment of the present invention, the front end portion of the first bending inducing line and the second bending inducing line is a front crotch region.

In the end point 6" of the side edge 5a of the side edge 5a of the first bending inducing line 6, the rear crotch region region R is present, and the other side edge 5b of the second bending inducing line 7 is behind. The end point 7" of the end RE side is the posterior crotch region RC.

Thereby, the disposable diaper of the present invention easily has a three-dimensional shape along the groin portion of the wearer. Specifically, the rear waist region of the disposable diaper is attached to the waist of the wearer when it is worn, so that the end point and the second fold of the rear end side of the first bending inducement line are The end point on the rear end side of the curve inducing line is in the back waist region, and the three-dimensional shape along the wearer's groin portion easily collapses, and the shape is not easily maintained. On the other hand, if the above-mentioned end point exists in the posterior crotch region, the three-dimensional shape along the squirrel portion of the wearer is not easily collapsed, and the conformability of the disposable diaper to the wearer can be improved.

In the disposable diaper according to another embodiment of the present invention, the end point of the rear end side of the first bending inducing line and the second bending inducing line is a back waist area.

In the first embodiment, the distance D ₂ between the second base point 16a and the long axis LA of the first bending inducing line 6 is larger than the distance between the first base point 15a and the long axis LA of the first bending inducing line 6. D ₁ is shorter. Similarly, the distance D ₂ between the second base point 16b and the long axis LA of the second bending induction line 7 is larger than the distance D ₁ between the first base point 15b and the long axis LA of the second bending induction line 7 short.

Thereby, the disposable diaper of the present invention is easy to follow the three-dimensional shape of the wearer's body, especially the groin. Because the wearer's groin is gradually narrowed from the ventral side to the back side.

The distance D ₂ between the second base point 16a and the long axis LA of the first bending inducing line 6 is shorter than the distance D ₃ between the second base point 16a and one side edge 5a, that is, the second base point 16a. It is closer to the long axis than the side edge 5a of one side. Similarly, the distance D ₂ between the second base point 16b and the long axis LA of the second bending induction line 7 is shorter than the distance D ₃ between the second base point 16b and the other side edge 5b, that is, The second base point 16b is closer to the long axis than the other side edge 5b.

Thereby, the disposable diaper of the present invention is easy to follow the three-dimensional shape of the wearer's body, especially the groin.

In the first embodiment, the disposable diaper 1 further includes a third bending inducing line 8 and a fourth bending inducing line 9 extending along the width direction W of the disposable diaper 1 and a third folding. The curve inducing line 8 includes the first base point 15a of the first bending inducing line 6 and the first base point 15b of the second bending inducing line 7, and the fourth bending inducing line 9 includes the second bending inducing line 6 The base point 16a and the second base point 16b of the second bending induction line 7.

In the disposable diaper of the present invention, the third bending inducing line includes the first base point of the first bending inducing line and the first base point of the second bending inducing line, so that the present invention is discarded after use. The diaper has a third bending induction line as a base axis, and is easily bent in the longitudinal direction of the disposable diaper after use. In the disposable diaper of the present invention, when the first folding inducing line and the second bending inducing line are bent as the base axis, the ends of the long-side direction of the disposable diaper are easily erected. The first bending inducing line and the second bending inducing line extend, and the elastic member of the disposable diaper is changed, but the third bending inducing line includes the first bending inducing line. The first base point and the first base point of the second bending induction line, and the disposable diaper has the third bending induction line as the base axis. In the longitudinal direction of the disposable diaper and on the wearer's side, it is easy to bend in an extremely beautiful state (a state in which wrinkles and the like are small).

In the disposable diaper of the present invention, the fourth bending point of the first bending inducing line and the second base point of the second bending inducing line are included in the fourth bending inducing line, so that the present invention is discarded after use. The diaper has a fourth bending induction line as a base axis, and is easily bent in the longitudinal direction of the disposable diaper and on the wearer's side. The effect is the same as that of the third bending induction line.

In the embodiment in which the disposable diaper of the present invention includes the third bending inducing line and the fourth bending inducing line, the third bending inducing line and the fourth bending inducing line are respectively associated with the absorption layer (or after use) The long axis of the disposable diaper is preferably orthogonal. Because the wearer's body is basically bilaterally symmetrical, considering the point of wearing.

In the first embodiment, the third bending inducing line 8 includes a pair of notched portions 23a and 23b which are directed from one side edge 5a and the other side edge 5b toward the long axis LA. The fourth bending inducing line 9 includes a pair of notch portions 24a and 24b extending from both the side edge 5a and the other side edge 5b toward the long axis LA. .

In the disposable diaper of the present invention, the third bending inducing line and/or the fourth bending inducing line include a pair of notch portions, and the third bending inducing line and/or the fourth bending inducing line are formed. The rigidity is lower than the area other than the bending induction line, that is, the area having no notch portion, and the disposable diaper has the third bending induction line and the fourth bending induction line as the base axis, after use. The disposable diaper has a long side and is easy to fold on the wearer's side. song. Further, the disposable diaper of the present invention has a notch portion, and the third bending inducing line is easily formed by the position including the first base point, and the fourth bending inducing line is provided by the position including the second base point. Easy to form.

In the first embodiment, the disposable diaper 1 has a squirrel-abutment contact region 10 which is formed by the first base point 15a and the second base point 16a of the first bending-inducing line 6, and The first base point 15b and the second base point 16b of the second bending induction line 7 are partitioned, and the disposable diaper 1 is worn, and includes a squirrel abutment region 10 and a squirrel abutment region. A substantially quadrangular frustum shaped portion 12 formed by the adjacent squirrel surrounding region 11 has a squirrel-shaped abutment region 10 as an upper base.

Further, in the first embodiment, the squirrel-abutment contact region 10 is also surrounded by the first bending inducing line 6, the second bending inducing line 7, the third bending inducing line 8, and the fourth bending inducing line 9. region.

When the wearer wears the disposable diaper 1, the front chin portion is mainly sandwiched by the wearer's feet, and the first bending inducement line 6 and the second bending induction line 7 are used as the base axis, and then discarded. The diaper 1 is bent in the width direction of the disposable diaper 1 and worn on the wearer side. Then, the first bending inducing line 6 and the second bending inducing line 7 are bent, and the third bending inducing line 8 and the fourth bending inducing line 9 are used as the base axis, and the disposable disposable diaper 1 is used. The disposable diaper 1 is bent in the longitudinal direction and on the wearer side. As a result, the disposable diaper 1 easily includes the shape portion 12 of the substantially quadrangular frustum.

In the first embodiment, the first base of the first bending inducing line The first base point 15b of the point 15a and the second bending inducing line (the third bending inducing line 8), the second base point 16a of the first bending inducing line, and the second base point 16b of the second bending inducing line (the first The 4 bending inducing line 9) is disposed in the front crotch region FC, and the entire groin portion abutting region 10 is separated from the front waist region FW and the crotch region RC, and the inside of the front crotch region FC exists.

Accordingly, the disposable diaper of the present invention is in a worn state, and includes a shape portion of a substantially quadrangular frustum having a squirrel abutment region as an upper base, and is easily formed along a three-dimensional shape of the wearer's body.

In the first embodiment, the absorbent layer 4 has a substantially rectangular shape in the stretched state of the disposable diaper 1 after use.

The technical field of the art pays attention to the convenience of the wearer. Although the absorbent layer is in the shape of an hourglass bell shape in an extended state, the absorption layer of the hourglass bell type receives a narrow area of the liquid, and thus the leakage is likely to occur. In the disposable diaper of the present invention, even in the case where the absorbing layer has a substantially rectangular shape, it can maintain the wearer's movement convenience along the three-dimensional shape of the wearer's body, especially the groin. Therefore, leakage is less likely to occur.

Further, the disposable diaper of the present invention may be in an extended state, and the absorbent layer may have an hourglass shape.

In the first embodiment, the disposable diaper 1 is provided next to one side edge 5a of the absorbent layer 4 (specifically, the inner side of one side edge 5a), and the first elastic member 21 is provided. 21 is disposed along the longitudinal axis LA of the absorbent layer 4, and is provided with a second elastic member 22 beside the other side edge 5b of the absorbent layer 4 (specifically, the inner side of the other side edge 5b). The second elastic member 22 is along The absorption layer 4 is disposed in the longitudinal direction L.

The disposable diaper of the present invention has a first elastic member and a second elastic member, and is disposable, and the disposable diaper is easily folded in the longitudinal direction of the disposable diaper after use. song.

Further, in the present specification, the inner side and the outer side of the side edge corresponding to the side edge are included beside the side edge.

In the first embodiment, the end portion 21' on the distal end FE side of the first elastic member 21 is disposed on the first base point 15a of the first bending inducing line 6 (and the first base point 15b of the second bending inducing line 7). The end portion 22' on the distal end FE side of the second elastic member 22 is disposed on the first base point 15b of the second bending inducing line 7 (and the first first bending inducing line 6). The base point 15a) is closer to the front end FE side. The end portion 21" of the first elastic member 21 on the rear end RE side is disposed closer to the second base point 16a of the first bending inducing line 6 (and the second base point 16b of the second bending induction line 7). The end portion 22 of the second elastic member 22 on the rear end RE side is disposed at the second base point 16b of the second bending inducing line 7 (and the second base point of the first bending inducing line 6). 16a) More on the back side RE side.

Therefore, the disposable diaper is used by the first base point of the first bending inducing line and the first base point of the second bending inducing line (for example, the third bending inducing line), and is discarded after use. The longitudinal direction of the diaper and the wearer's side are easily bent, and the second base point of the first bending inducing line and the second base point of the second bending inducing line (for example, the fourth bending inducing line) are In the long-side direction of the disposable diaper and the wearer's side, it is easy to bend.

The elastic member including the first elastic member and the second elastic member is used As is well known in the art, polyurethane elastomers of about 470 to 940 dtex are exemplified.

In the first embodiment, the first bending inducing line 6 and the second bending inducing line 7 are formed by compressing the liquid pervious layer 2 and the absorption layer 4. Specifically, the first bending inducing line 6 includes an embossed portion 30a which is embossed intermittently along the first bending inducing line 6 by intermittently embossing the liquid permeable layer 2 and the absorbing layer 4 form. Similarly, the second bending inducing line 7 includes an embossed portion 30b formed by intermittently embossing the liquid-permeable layer 2 and the absorbing layer 4 along the second bending-inducing line 7. .

In the disposable diaper of the present invention, the first bending inducing line and/or the second bending inducing line include an embossed portion, and the thickness of the first bending inducing line and/or the second bending inducing line is made. In the disposable disposable diaper, the first bending inducing line and/or the second bending inducing line are used as the base axis, and the disposable diaper is easily bent in the width direction of the disposable diaper.

Further, the first bending inducing line 6 is provided with the low basis weight region 28a in the absorption layer 4, and the low basis weight region 28a is a low basis weight region extending along the first bending inducing line 6 and having a certain width. A basis weight lower than the average basis weight of the absorbing layer 4. Similarly, the second bending inducing line 7 is provided with the low basis weight region 28b in the absorption layer 4, and the low basis weight region 28b is a low basis weight region extending along the second bending inducing line 7 and having a certain width. It has a basis weight lower than the average basis weight of the absorbing layer 4.

In the disposable diaper of the present invention, the first bending inducing line and/or the second bending inducing line have a low basis weight area, and The disposable diaper has a first bending inducing line and/or a second bending inducing line as a base axis, and is easily bent in the width direction of the disposable diaper and on the wearer's side.

In the embodiment of the disposable diaper of the present invention having a low basis weight region, the low basis weight region preferably has a basis weight of 30 to 90% by mass of the average basis weight of the absorbing layer, and more preferably has absorption. The basis weight of the layer has an average basis weight of 40 to 80% by mass. When the ratio is less than 30%, the absorbed liquid tends to be less than the first bending inducing line and the second bending inducing line, and if the ratio exceeds 90%, the disposable diaper is used. The first bending induction line and the second bending induction line are used as the base axis, and the disposable diaper is not easily bent in the width direction of the disposable diaper.

Further, the above absorbent layer preferably has an average basis weight of from 300 to 700 g/m ² .

In the first embodiment, the first bending inducing line 6 is provided with a depressed portion 29a in the low basis weight region 28a, and the depressed portion 29a is formed on the surface of the absorbent layer 4 on the liquid-permeable layer 2 side, and the second bending is performed. The induction line 7 is provided with a depressed portion 29b in the low basis weight region 28b, and the depressed portion 29b is formed on the surface of the absorbent layer 4 on the liquid-permeable layer 2 side.

As a result, the disposable diaper of the present invention has the first bending inducing line and the second bending inducing line as the base axis, and is easily bent on the side of the depressed portion, that is, on the wearer side.

Fig. 6 is an explanatory view for explaining the low basis weight regions 28a and 28b. Figure 6 is an absorbent layer 4 and a core package before forming the embossed portions 30a and 30b. An end view of the layer 4a corresponding to the V-V end face of Fig. 3. The absorbing layer 4 shown in Fig. 6 has a depressed portion 29a, that is, a low basis weight region 28a having a bottom portion 28aa forming the embossed portion 30a and inclined portions 28ab on both sides thereof. Further, the absorbing layer 4 shown in Fig. 6 has a depressed portion 29b, that is, a low basis weight region 28b, and the low basis weight region 28b has a bottom portion 28ba on which the embossed portion 30b is formed, and inclined portions 28bb on both sides thereof.

Among the low basis weight regions 28a and 28b, the bottom portions 28aa and 28ba have the smallest basis weight, and in the inclined portions 28ab and 28bb, the basis weight gradually increases as they move away from the bottom portions 28aa and 28ba.

By forming the low basis weight region, the disposable diaper has the first bending inducing line and the second bending inducing line as the base axis, and is easily bent in the width direction of the disposable diaper and on the wearer side.

The above-described low basis weight region can be formed, for example, according to the method described in Japanese Patent Laid-Open No. 2010-233839.

In the first embodiment, the first bending inducing line 6 and the second bending inducing line 7 each have embossed portions 30a and 30b, and the embossed portions 30a and 30b are along the first bending inducing line 6 and The 2 bending induction line 7 is formed by intermittently embossing a portion of the liquid-permeable layer 2, the core cladding layer 4a, and the low basis weight regions 28a and 28b of the absorption layer 4, but after the use of the present invention The disposable diaper has an embossed portion formed by embossing the layer to be embossed continuously or intermittently. The embossed portion is preferably formed by intermittently embossing the layer to be embossed from the viewpoint that the wearer does not easily feel the hardness.

As the layer to be embossed, as long as it is the first bending induction The function of the thread and the second bending induction line as the bending induction line is not particularly limited, and examples thereof include an absorbing layer, an absorbing layer and a core cladding layer, an absorbing layer, a core cladding layer, and a liquid permeable layer; an absorbing layer; Core cladding, auxiliary foil, liquid permeable layer, and the like.

Further, a part of the low basis weight of the absorbing layer may be embossed and embossed as a whole.

In the embodiment in which the first bending inducing line and the second bending inducing line have the embossed portion and the low basis weight region at least in the absorbing layer, the absorbing layer contains pulp fibers and a highly absorbent material, and the low basal weight region The mass ratio of the superabsorbent material is preferably lower than the mass ratio of the superabsorbent material in the region other than the low basis weight region in the absorbent layer. In this way, the embossed portion can be formed on the first bending inducing line and the second bending inducing line without damaging the core cladding layer, and the first bending inducing line and the second bending inducing line can be easily induced as the bending. The function of the line.

The superabsorbent material may, for example, be a starch-based, cellulose-based or synthetic polymer-based superabsorbent material.

The mass ratio of the highly absorbent material was measured as follows.

(1) From the low basis weight region of the absorption layer, a quantitative low basis weight sample is cut out, and the area s ₀ (cm ² ) and mass m ₀ (g) are measured.

(2) The low-basis re-sampling was placed in a nylon bag of 400 mesh, immersed in a physiological saline solution (concentration: 0.9% by mass) of 1000 mL for 30 minutes, dehydrated at 150 G (850 rpm) for 2 minutes, and the low temperature after dehydration was taken out from the nylon bag. The basis weight was sampled and its mass m ₁ (g) was determined.

The water absorption rate A _1b (%) was calculated by the following formula: A _1b (%) = 100 × (m _{1 -} m ₀ ) / s ₁ .

(3) A _{predetermined} amount of sampling is cut out from a region other than the low basis weight region of the absorption layer, and the water absorption ratio A _nb (%) is calculated in the same manner as the low basis weight sampling.

(4) As long as the water absorption rate A _1b (%) < water absorption rate A _nb (%), the mass ratio of the superabsorbent material in the low basis weight region is judged, and the high absorption in the region other than the low basis weight region in the absorption layer The quality ratio of the material is lower.

Further, the measurement was carried out at 20 °C.

In the first embodiment, the disposable diaper 1 includes the absorbing layer 4a between the one side edge 5a and the first bending inducing line 6, the other side edge 5b, and the second bending inducing line 7. The absorption layer 4b between the first absorption layer 4b and the first bending inducing line 6 and the second bending inducing line 7 is formed.

The disposable diaper of the present invention comprises an absorbing layer between the side edge and the first bending line and the absorbing layer between the other side edge and the second bending line. The disposable diaper, especially when the front chin area is clamped by the wearer's feet, because the rigidity of the absorbing layer is high, the disposable diaper is used as the first bending line and the second bending line. It is easy to bend as a base shaft, and the both ends of the longitudinal direction of the disposable diaper are easily erected, so that the disposable diaper easily follows the three-dimensional shape of the wearer's body.

In the first embodiment, the disposable diaper 1 includes a pair of three-dimensional gathers 25 on both side portions in the longitudinal direction L of the disposable diaper 1 after use. The pair of three-dimensional wrinkles 25 respectively have a free end 25a of the long axis of the disposable diaper 1 and a farther end than the free end 25a The fixed end 25b of the long axis LA of the disposable diaper 1 is used. The fixed end 25b is fixed to the liquid permeable layer 2. The free end 25a has elasticity in the longitudinal direction L of the disposable diaper 1 by including the elastic member 26a, and the free end 25a passes through the fixing portion at both ends of the longitudinal direction L of the disposable diaper 1 after use. 31 is fixed to the top sheet 2.

In the first embodiment, the disposable diaper 1 is stretched, and the squirrel abutment region 10 and the pair of three-dimensional pleats 25 are not repeated in the thickness direction of the disposable diaper 1 after use.

Accordingly, in the disposable diaper of the present invention, the crocodile abutment region is easy to maintain its shape, and the disposable diaper is easily worn along the three-dimensional shape of the wearer's body.

Further, in the disposable diaper of the present invention, it is preferable that the first bending inducing line and the second bending inducing line are aligned with respect to the long axis of the absorbent layer. The wearer's body is basically symmetrical, and for the sake of wearing a sense of wear.

In the disposable diaper of the present invention, it is preferable that each of the first bending inducing line and the second bending inducing line does not intersect the long axis of the absorbent layer. The squirrel-abutment abutment region formed by the first base point and the second base point of the first bending-inducing line and the first base point and the second base point of the second bending-inducing line (the disposable type of the present invention) In the embodiment in which the diaper includes the third bending inducing line and the fourth bending inducing line, the first bending inducing line, the second bending inducing line, the third bending inducing line, and the fourth bending inducing line are The formed squirrel abutment region is formed on the long axis of the absorbing layer.

Further, in the disposable diaper of the present invention, one or both of the first bending inducing line and the second bending inducing line may further include an additional base point between the first base point and the second base point. The disposable diaper has a new bending inducement line between the third bending inducement line and the fourth bending induction line, and the new bending induction line is used to make the disposable diaper long in use. In the side direction and the wearer side is bent, the disposable diaper is worn in a state of being worn, and it is more likely to have a shape along the three-dimensional shape of the wearer's body.

As the additional base point, the distance from the distal end is not changed or moved away from the long axis in the direction from the distal end toward the rear end, and the length is approached as it moves away from the additional base point. Axis.

As described in the first embodiment, the disposable diaper of the present invention preferably includes a first base point and a second base point of the first bending inducing line in the worn state, and the second bending inducing line A substantially rectangular squirrel abutment region in which the first base point and the second base point are separated (enclosed by the first bending inducing line, the second bending inducing line, the third bending inducing line, and the fourth bending inducing line) And a substantially rectangular squirrel abutment region); and a region around the groin portion adjacent to the squirrel abutment region, the squirrel abutment region is a shape portion of the substantially quadrangular frustum of the upper base. In the wearing state, it can follow the shape of the wearer's body, specifically, the shape of the groin. Moreover, by using the disposable diaper along the shape of the groin, it is possible to receive urination in a wider area, so that leakage of urination is reduced.

The disposable diapers of the present invention can be made by a combination of methods well known in the art. For example, the absorbing layer of the first embodiment can be produced by the method described in Japanese Laid-Open Patent Publication No. 2010-233839.

1‧‧‧Disposable disposable diapers

2‧‧‧liquid permeable layer

3‧‧‧ liquid-impermeable layer

4‧‧‧Absorbent layer

5a‧‧‧ side of the side

5b‧‧‧ the other side

6‧‧‧1st bend induction line

6'‧‧‧ starting point

6" ‧ ‧ end

7‧‧‧2nd bend induction line

7'‧‧‧ starting point

7" ‧ ‧ end

10‧‧‧ 蹊 抵 抵 area

21‧‧‧1st elastic member

22‧‧‧2nd elastic member

23a, 23b‧‧‧ gap

24a, 24b‧‧‧ gap

25‧‧‧Three-dimensional wrinkles

25a‧‧‧Free end

25b‧‧‧ fixed end

26a, 26b‧‧‧ elastic members

27‧‧‧Buckle belt

30a, 30b‧‧‧ embossing department

31‧‧‧ Fixed Department

F‧‧‧Predecessor

R‧‧‧Back body

FW‧‧ front waist area

FC‧‧‧ front and rear area

RW‧‧‧After Waist Area

RC‧‧‧After the cadre area

Claims (15)

A disposable diaper having a liquid permeable layer; a liquid impermeable layer; and an absorbing layer having a side edge, a side edge, a long axis, a front end and a rear end between the one side, The disposable diaper includes at least the first bending inducing line and the second bending inducing line in the absorbent layer, and the first bending inducing line and the second bending inducing line have a side edge from the one side and Each of the other side edges has a curved shape that protrudes toward the long axis, and the first bending inducing line and the second bending inducing line respectively have a first base point on the distal end side and a second base point on the rear end side, and The first bending inducing line and the second bending inducing line approach the long axis as they approach the first base point in the direction from the front end toward the rear end, and are not separated from the long axis as they move away from the first base point. The distance is changed or is away from the long axis, and the first bending inducing line and the second bending inducing line are close to the long axis or close to the second base point in the direction from the front end toward the rear end. The distance of the long axis changes, and Moving away from the second base point and away from the long axis, the first bending inducing line and the second bending inducing line are formed by at least compressing the absorbent layer, and the disposable diaper is used in the aforementioned one. The absorption layer is provided between the side edge and the first bending inducing line, between the first bending inducing line and the second bending inducing line, and between the other side edge and the second bending inducing line. The disposable diaper according to claim 1, wherein the disposable diaper is divided into: a front waist region, a rear waist region, and a front crotch region between the front waist region and the rear waist region. The posterior crotch region is the first base point and the second base point of the first bending inducing line, and the first base point and the second base point of the second bending inducing line. The disposable diaper of claim 1 or 2, wherein the disposable diaper is divided into a front waist region, a rear waist region, and a front sill between the front waist region and the rear waist region. In the partial region and the posterior condyle region, the front waistline region is present at the start point of the one side edge and the other side edge of each of the first bending inducing line and the second bending inducing line. The disposable diaper of claim 3, wherein the side edge of the one side of the first bending inducing line and the second bending inducing line and the end point of the rear end side of the other side edge are present The aforementioned posterior crotch region. The disposable diaper according to any one of claims 1 to 3, wherein the second bending point of the first bending inducing line and the second bending inducing line respectively have a first bending inducing line and a second The distance from the long axis of the first base point of the bend inducing line is short. The disposable diaper according to any one of claims 1 to 3, wherein the second base point of the first bending inducement line and the second bending induction line respectively have a side edge and the other side of the one side The distance of the side edges is short and the distance from the aforementioned long axis. Disposable disposable urine if used in any of items 1 to 3 In the pants, the first bending inducing line and the second bending inducing line are provided with embossed portions, and the embossing portions are at least absorbed by the first bending inducing line and the second bending inducing line. The layer is formed by embossing continuously or intermittently. The disposable diaper according to any one of claims 1 to 3, wherein the first bending inducing line and the second bending inducing line are respectively provided in the absorption layer along the first bending inducing line and The second bending inducing line extends and has a low basis weight region of a certain width, and the low basis weight region has a lower basis weight than the average basis weight of the foregoing absorbent layer. The disposable diaper of claim 8, wherein the first bending inducing line and the second bending inducing line respectively have a depressed portion in the low basis weight region, and the depressed portion is formed in the absorbing layer The surface on the side of the liquid permeable layer. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper further comprises a third bending inducing line extending in a width direction of the disposable diaper and The fourth bending inducing line includes a first bending inducing line and a first base point of the second bending inducing line, and the fourth bending inducing line includes the first bending inducing line and the second bending The second base point of the induction line. The disposable diaper according to any one of claims 1 to 3, wherein at least one of the third bending induction line and the fourth bending induction line includes a pair of notched portions, and the pair of notched portions are Both the side edge of the one side and the side edge of the other side extend toward the long axis. The disposable diaper of any one of claims 1 to 3, wherein the disposable diaper has a squirrel abutment area, The squirrel-abutment region is formed by separating the first base point and the second base point of the first bending-inducing line and the first base point and the second base point of the second bending-inducing line, and the disposable diaper The wearing state includes a shape portion of the substantially quadrangular frustum, and the shape portion of the substantially quadrangular frustum is formed by the squirrel abutment region and the surrounding area of the groin portion adjacent to the squirrel abutment region and the groin portion The abutment area is used as the upper base. The disposable diaper of any one of claims 1 to 3, wherein the disposable diaper is attached to the side edge of the one side and the side edge of the other side, respectively, along the length The first elastic member and the second elastic member disposed in the axial direction. In the disposable diaper of the claim 13, the end portions of the first elastic member and the second elastic member on the distal end side are respectively disposed on the first bending inducing line and the second bending inducing line. 1 base point is close to the front end side, and the end portions of the first elastic member and the second elastic member on the rear end side are respectively disposed closer to the rear end than the second base point of the first bending induction line and the second bending induction line side. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is provided on the both sides of the longitudinal direction of the disposable diaper, and comprises a pair of three-dimensional wrinkles a pair of three-dimensional wrinkles having a free end adjacent to the long axis of the disposable disposable diaper and a fixed end that is further away from the long axis of the disposable disposable diaper than the free end; The end portion has elasticity along the longitudinal direction of the disposable disposable diaper; and the stretched state of the disposable diaper after the use, the first base point and the second base point of the first bending inducement line, and The nipple abutment region in which the first base point and the second base point of the bending induction line are separated from each other, and the pair of three-dimensional wrinkles are not repeated in the thickness direction of the disposable diaper.