KR102546446B1 - Disposable diaper - Google Patents

Abstract

An object of the present disclosure is to provide a disposable diaper having a shape following a three-dimensional shape of a wearer's body in a worn state. The disposable diaper of the present disclosure has the following structures. A liquid-permeable layer 2, a liquid-impervious layer 3, and a predetermined absorbent layer 4 are provided, and a front waist region FW, a rear waist region RW, and a front crotch between them A disposable diaper (1) partitioned into a subregion (FC) and a rear crotch region (RC), wherein the disposable diaper (1) has a length axis (LA) and a longitudinal axis (LA) in the front crotch region (FC) of the absorbent layer (4). A first bending guide line 6 disposed between one side edge 5a and extending in the direction of the length axis LA, and disposed between the length axis LA and the other side edge 5b and extending in the direction of the length axis LA It has a second bend guide line 7 extending in the direction of the axis LA, and each of the first bend guide line 6 and the second bend guide line 7 is at least a compressed portion of the absorbent layer 4; It includes a groove portion or a slit portion, and the disposable diaper 1 is formed by compressing the absorbent layer 4 in the central region 15 between the first bend guide line 6 and the second bend guide line 7. A disposable diaper (1) characterized by having a portion.

Description

Disposable diaper {DISPOSABLE DIAPER}

The present disclosure relates to disposable diapers.

In disposable diapers, various devices have been made in order to realize a good fit while preventing excretion from leaking.

For example, in FIG. 5 of Patent Document 1, an absorbent core including an hourglass-shaped central absorber 34A and a pair of side absorbers 34B and 34B symmetrically formed on both sides of the central absorber 34A ( 34) is described. In the absorbent core 34, between the center absorbent body 34A and the pair of side absorbent bodies 34B and 34B, cut-out separation portions 34C and 34C are formed, respectively.

According to Patent Literature 1, when the absorbent core 34 has the separation portion 34C, both side edge portions of the absorbent core 34 stand up easily, and when the absorbent core 34 is pressed in the width direction, the absorbent core 34 (34) It is described that shrinkage in the width direction of the outer covering material 2 is less likely to be inhibited because the overall width is narrower.

Japanese Unexamined Patent Publication No. 2008-131968

However, since the disposable diaper described in Patent Literature 1 is bent in the width direction, it follows the left and right lines of the wearer's body, but the disposable diaper described in Patent Literature 1 is designed along the front and rear lines of the wearer's body. There is not.

Accordingly, an object of the present disclosure is to provide a disposable diaper conforming to the three-dimensional shape of the wearer's body when worn.

The present disclosure provides a liquid-permeable layer, a liquid-impermeable layer, and an absorbent layer having one side edge, the other side edge, a longitudinal axis, a front end and a rear end therebetween, a front waist region, and a rear waist region. A disposable diaper divided into a front crotch region and a rear crotch region between the front waist region and the rear waist region, wherein the disposable diaper is disposed in the front crotch region of the absorbent layer by the longitudinal axis A first bending guide line disposed between and one side edge and extending in the direction of the longitudinal axis, and a second bending guide line disposed between the length axis and the other side edge and extending in the direction of the longitudinal axis wherein each of the first bend guide line and the second bend guide line includes at least a compression part, a groove part or a slit part of the absorbent layer, and the disposable diaper has a center region between the first bend guide line and the second bend guide line. It has been found that the disposable diaper is characterized in that it has a compression portion formed by compressing the absorbent layer inside.

The disposable diaper of the present disclosure conforms to the three-dimensional shape of the wearer's body when worn.

1 is a perspective view of a disposable diaper 1 according to one embodiment of the present disclosure.
FIG. 2 is a plan view of the disposable diaper 1 shown in FIG. 1 .
FIG. 3 is a plan view of the absorbent layer 4 of the disposable diaper 1 shown in FIG. 2, the core wrap 4a covering the absorbent layer 4, the first elastic member 21 and the second elastic member 22 am.
Fig. 4 is a cross-sectional view taken along the IV-IV section of Fig. 2;
5 is a sectional view in a VV section of FIG. 3 .
Fig. 6 is a cross-sectional view corresponding to the VV section in Fig. 3 of the absorbent layer 4 and the core wrap 4a before the embossed portions 30a and 30b for the bend guide wire are formed.
FIG. 7 is a view showing a worn state of the disposable diaper 1 shown in FIG. 1 .
8 is a view for explaining a disposable diaper 1 according to another embodiment of the present disclosure.
9 is a view for explaining the waist circumference area and the crotch area of the tape-type disposable diaper.

[Justice]

About terms used in this specification, their definitions are explained.

[front end and rear end]

In this specification, "front end" and "rear end" of the absorbent layer refer to the end of the absorbent layer in the belly direction and the end of the absorbent layer in the dorsal direction, respectively, with respect to the wearer.

[Front road and back road]

In this specification, "front length" and "back length" refer to a front part and a rear part, respectively, when a disposable diaper is divided into two in the longitudinal direction of the disposable diaper by a straight line extending in the width direction of the disposable diaper. am.

[Body circumference area and crotch area]

In this specification, the "torso region" and the "crotch region" have the following meanings.

(1) Pants type disposable diaper

In the pants-type disposable diaper, the waist region is composed of a front waist region on the front body and a back waist region on the back body.

The front body circumference area refers to an area sandwiched between a pair of junctions joining the front body and the back body in the front body, and the rear body circumference region refers to an area sandwiched between the pair of junctions in the back body.

Further, in the pants-type disposable diaper, the crotch region means the region between the front waist region and the rear waist region, and is composed of a front crotch region present on the front body and a rear crotch region present on the back body. . The crotch area also corresponds to the area sandwiched between the pair of leg openings (reference numeral 64 in Fig. 9).

(2) Tape-type disposable diapers

In the tape-type disposable diaper, as shown in FIG. 9 , in a state where the front ends 27a of a pair of tape fasteners 27 face each other in a predetermined fixing area 27b for tape fasteners, the torso is fixed. The circumference region and the crotch region are partitioned.

Specifically, the waist circumference region FW+RW is formed by the waist circumference forming member 61 of the front body F and the waist circumference of the back body R in the disposable diaper 1 in the state in which it is fixed as described above. It is determined based on a pair of overlapping portions 63 in which the forming members 62 overlap. The front waist region FW means the region between the pair of overlapping portions 63 in the front body F of the disposable diaper 1 . Similarly, the rear waist area RW means the area between the pair of overlapping portions 63 in the back length R of the disposable diaper 1 .

The crotch region (FC + RC) means the area between the front waist region FW and the rear waist region RW, and the front crotch region FC present in the front body F and the back body ( It consists of the rear crotch region (RC) present in R).

The disposable diaper of the present disclosure will be described in detail below using drawings as necessary.

1 to 5 and 7 are views for explaining a disposable diaper 1 according to one of the embodiments of the present disclosure (hereinafter sometimes referred to as “first embodiment”). In detail, FIG. 1 shows a disposable diaper 1 according to a first embodiment in a worn state in a first bend guide line, a second bend guide wire, a third bend guide wire, and a fourth bend guide wire. It is a perspective view of a bent state on the wearer's side (liquid-permeable layer 2 side).

FIG. 2 is a plan view of the disposable diaper 1 shown in FIG. 1 . FIG. 3 is a plan view of the absorbent layer 4 of the disposable diaper 1 shown in FIG. 2, the core wrap 4a covering the absorbent layer 4, the first elastic member 21 and the second elastic member 22 am. 4 is a sectional view taken along the IV-IV section in FIG. 2, and FIG. 5 is a sectional view taken along the V-V section in FIG. Also, FIG. 7 is a view showing a worn state of the disposable diaper 1 shown in FIG. 1 .

On the other hand, 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 tape fastener 27, and the like.

In the first embodiment, a disposable diaper 1 includes a liquid-permeable layer 2 as a top sheet, a liquid-impermeable layer 3 as a back sheet, and a gap between the liquid-permeable layer 2 and the liquid-impermeable layer 3. An absorbent layer (4) is provided. The disposable diaper 1 is divided into a front body F and a back body R, and the front body F is further divided into a front waist region FW and a front crotch region FC, and a back body ( R) is further divided into a rear waist region RW and a rear crotch region RC. The absorption layer 4 has one side edge 5a, the other side edge 5b, a longitudinal axis LA, a front end FE, and a rear end RE.

In the first embodiment, the disposable diaper 1 is disposed in the front crotch region FC of the absorbent layer 4 between the longitudinal axis LA and one side edge 5a, and A first bending guide line 6 extending in the direction and a second bending guide line 7 disposed between the length axis LA and the other side edge 5b and extending in the direction of the length axis LA have

In the first embodiment, the disposable diaper 1 is compressed in the central region 15 between the first bending guide line 6 and the second bending guide line 7 in the front crotch region FC. It has a portion, specifically, a first embossed portion 13 and a second embossed portion 14 formed by compressing the absorbent layer 4.

Each of the first embossed portion 13 and the second embossed portion 14 is in a direction that is not parallel to the direction of the longitudinal axis LA and is not orthogonal to the direction of the longitudinal axis LA. It is an extended, linear embossed part. In addition, the 1st embossing part 13 and the 2nd embossing part 14 are not parallel.

In the disposable diaper of the present disclosure, by having the compression portion in the above-mentioned central region, the rigidity of the absorbent layer in the central region is increased, and the disposable diaper uses the first bending guide wire and the second bending guide wire as pivots. , the width direction of the disposable diaper also tends to bend towards the wearer.

The disposable diaper of the present disclosure may have a compression portion in the central region without any particular limitation as long as it is between the first bend guide line and the second bend guide line. The disposable diaper of the present disclosure preferably has the compression portion in the central region at least in the front crotch region, and more preferably in the front crotch region and the front waist region. This is because the disposable diaper is easily bent in the width direction and toward the wearer side using the first bending guide wire and the second bend guide wire as pivots.

In addition, the disposable diaper of the present disclosure preferably has the compression portion in a central region on the front end side of the second origin point of the first bend guide line and the second origin point of the second bend guide line. This is because the disposable diaper is easily bent in the width direction and toward the wearer side using the first bending guide wire and the second bend guide wire as pivots.

In the disposable diaper of the present disclosure, it is preferable that the rigidity of the absorbent layer in the above-described central region is higher than that of the absorbent layer in regions other than the central region of the absorbent layer. This is because the disposable diaper is easily bent in the width direction of the disposable diaper and toward the wearer side with the first bending guide line and the second bend guide line as pivots.

Examples of regions other than the central region include a region between one side edge of the absorber layer and the first bend guide line, and a region between the other side edge of the absorber layer and the second bend guide line.

In the disposable diaper of the present disclosure, the compression portion, eg, the embossed portion formed in the aforementioned central region, includes, for example, an absorbent layer; absorbent layer and core wrap; absorbent layer, core wrap and liquid permeable layer; It is formed by compressing, for example, embossing the absorbent layer, the core wrap, the auxiliary sheet, the liquid-permeable layer, and the like.

On the other hand, from the viewpoint of wearing comfort, it is preferable that the compression portion formed in the central region is line symmetrical with respect to the longitudinal axis of the absorbent layer.

In the first embodiment, the first bending guide line 6 has a first starting point 16a on the front end FE side and a second starting point 17a on the rear end RE side, and has a second bending guide line. The line 7 has a first starting point 16b on the front end FE side and a second starting point 17b on the rear end RE side.

The first bending guide line 6 approaches the length axis LA as it approaches the first starting point 16a in the direction D from the front end FE to the rear end RE, and the first The distance from the longitudinal axis LA does not change as it moves away from the starting point 16a. Further, in the direction D from the front end FE to the rear end RE, the second bend guide line 7 approaches the length axis LA as it approaches the first starting point 16b, and As the distance from the first starting point 16b increases, the distance from the longitudinal axis LA does not change.

By doing so, the disposable diaper of the present disclosure is easily bent in the longitudinal direction of the disposable diaper and toward the wearer at the first starting point of the first bending guide line and the first starting point of the second bending guide line (see the third bending guide line described later). easier to have).

The first bending guide line 6 approaches the longitudinal axis LA as it approaches the second starting point 17a in the direction D from the front end FE to the rear end RE, and the second As it moves away from the origin 17a, it moves away from the longitudinal axis LA. Similarly, the second bend guide line 7 approaches the longitudinal axis LA as it approaches the second starting point 17b in the direction D from the front end FE to the rear end RE, and As it moves away from the second starting point 17b, it moves away from the longitudinal axis LA.

By doing so, the disposable diaper of the present disclosure is easily bent in the longitudinal direction of the disposable diaper and toward the wearer at the second starting point of the first bending guide line and the second starting point of the second bending guide line (see the fourth bending guide line described later). easier to have).

In the first embodiment, the distance D ₂ between the second starting point 17a of the first bending guide line 6 and the longitudinal axis LA is the first starting point 16a of the first bending guide line 6. ) and the distance (D ₁ ) between the longitudinal axis LA. Similarly, the distance D ₂ between the second starting point 17b of the second bending guide line 7 and the longitudinal axis LA is the first starting point 16b of the second bending guide line 7 and the longitudinal axis LA. (LA) is shorter than the distance (D ₁ ) between them.

By doing so, the disposable diaper of the present disclosure easily conforms to the three-dimensional shape of the wearer's body, particularly the inguinal region. This is because the width of the inguinal region of the wearer narrows from the belly side toward the back side.

The distance D 2 between the second starting point 17a of the first bending guide line 6 and _the length axis LA is the distance D ₃ between the second starting point 17a and one side edge 5a. The shorter, that is, the second starting point 17a is closer to the longitudinal axis than the side edge 5a. Similarly, the distance D ₂ between the second starting point 17b of the second bend guide line 7 and the length axis LA is the distance between the second starting point 17b and the other side edge 5b ( D ₃ ), that is, the second starting point 17b is closer to the longitudinal axis than the other side edge 5b.

By doing so, the disposable diaper of the present disclosure easily conforms to the three-dimensional shape of the wearer's body, particularly the inguinal region.

In the first embodiment, the disposable diaper 1 further includes a third bending guide wire 8 and a fourth bend guide wire 9 extending in the width direction W of the disposable diaper 1, The third bending guide line 8 includes the first starting point 16a of the first bending guide line 6 and the first starting point 16b of the second bending guide line 7, and the fourth bending guide line The line 9 includes the second origin point 17a of the first bend guide line 6 and the second origin point 17b of the second bend guide line 7 .

In the disposable diaper of the present disclosure, the third bend guide line includes the first base point of the first bend guide line and the first base point of the second bend guide line, so that the disposable diaper of the present disclosure takes the third bend guide line as the base axis. As a result, the longitudinal direction of the disposable diaper also tends to be bent toward the wearer's side. When the disposable diaper of the present disclosure is bent with the first bending guide wire and the second bend guide wire as pivots, the ease of standing up at both ends in the longitudinal direction of the disposable diaper is due to the first bend guide wire and the second bend guide wire. Although it changes depending on the extending direction and the elastic member of the disposable diaper, etc., the third bending guide line includes the first starting point of the first bending guide line and the first starting point of the second bending guide line, so that the disposable diaper can bend the third bend guide line. Using the guide wire as the pivot, the disposable diaper is easily bent in the longitudinal direction and toward the wearer in a state of excellent aesthetics (a state with few wrinkles, etc.).

In the disposable diaper of the present disclosure, the fourth bend guide line includes the second origin point of the first bend guide line and the second origin point of the second bend guide line, so that the disposable diaper of the present disclosure takes the fourth bend guide line as a reference point. As a result, the longitudinal direction of the disposable diaper also tends to be bent toward the wearer's side. Its action is the same as that of the third bending guide wire.

In an embodiment in which the disposable diaper of the present disclosure includes the third bend guide line and the fourth bend guide line, each of the third bend guide line and the fourth bend guide line is orthogonal to the longitudinal axis of the absorbent layer (or disposable diaper). it is desirable The wearer's body is basically symmetrical, and this is because of the point of view of wearing comfort.

In the first embodiment, the third bending guide wire 8 includes a pair of cutout portions 23a extending toward the longitudinal axis LA from both sides of one side edge 5a and the other side edge 5b, and 23b), and the fourth bending guide line 9 includes a pair of cutouts 24a extending from both sides of one side edge 5a and the other side edge 5b toward the longitudinal axis LA. and 24b).

In the disposable diaper of the present disclosure, since the third bend guide wire and/or the fourth bend guide wire include a pair of cutouts, the stiffness of the third bend guide wire and/or the fourth bend guide wire is improved. It is lower than the rigidity of other areas, that is, areas without cutouts, so that the disposable diaper is easily bent in the longitudinal direction and toward the wearer side with the third bending guide line and the fourth bending guide line as the main axis. In addition, since the disposable diaper of the present disclosure has a cutout, the third bending guide line is more easily formed at a position including the first starting point, and the fourth bending guide line is at a position including the second starting point. is easier to form.

In the first embodiment, the disposable diaper 1 includes the first origin points 16a and the second origin points 17a of the first bend guide line 6, and the first origin point of the second bend guide line 7 ( 16b) and the second starting point 17b, and the disposable diaper 1, in a worn state, has an inguinal contact area 10 and an inguinal area adjacent to the inguinal contact area. It includes a substantially quadrangular truncated shape portion 12 formed by the area 11 and having the inguinal contact area 10 as an upper side.

On the other hand, in the first embodiment, the inguinal contact area 10 includes the first bending guide line 6, the second bending guide line 7, the third bending guide line 8, and the fourth bending guide wire 9. ) is also the region surrounded by

When the wearer wears the disposable diaper 1, the front crotch area is mainly sandwiched by both legs of the wearer, and the first bending guide wire 6 and the second bend guide wire 7 are used as axes, and the disposable diaper (1) is bent in the width direction of the disposable diaper 1 and toward the wearer. Subsequently, by bending the first bending guide wire 6 and the second bend guide wire 7, the disposable diaper 1 ) is bent in the longitudinal direction of the disposable diaper 1 and also toward the wearer. As a result, the disposable diaper 1 tends to include the portion 12 of a substantially quadrangular truncated shape.

In the first embodiment, the first starting point 16a of the first bending guide line 6 and the first starting point 16b of the second bending guide line 7 (third bending guide line 8), 1 The second starting point 17a of the bending guide line 6 and the second starting point 17b of the second bending guide line 7 (the fourth bending guide line 9) are within the front crotch region FC. The entire groin contact region 10 exists inside the front crotch region FC, away from the front waist region FW and the rear crotch region RC.

By doing so, the disposable diaper of the present disclosure, in a worn state, tends to include portions in the shape of a substantially quadrangular truncated pyramid with the upper side of the inguinal area contacting area, and thus easily conforms to the three-dimensional shape of the wearer's body.

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

In the field of the art, emphasis is placed on the ease of movement of the wearer, and it is practiced to make the absorbent layer into an hourglass shape in the unfolded state. However, since the area for receiving liquid in the hourglass shape absorbent layer is narrow, leakage occurs. There is a possibility that this may become more likely to occur. In the disposable diaper of the present disclosure, even when the absorbent layer has a substantially rectangular shape, leakage is unlikely to occur because it can conform to the three-dimensional shape of the wearer's body, particularly the inguinal region, while maintaining the ease of movement of the wearer.

On the other hand, in the disposable diaper of the present disclosure, the absorbent layer may have an hourglass shape in the unfolded state.

In the first embodiment, the first bending guide wire 6 has a curved shape projecting from one side edge 5a toward the longitudinal axis LA, and the second bend guide wire 7 has a curved shape projecting from the side edge 5a on the other side. It has a curved shape protruding from the side edge 5b toward the longitudinal axis LA.

Since the first bending guide wire and the second bending guide wire have the above-described curved shapes, the disposable diaper of the present disclosure, with the first bending guide wire and the second bending guide wire as the base axes, the lengthwise direction of the disposable diaper and the wearer On the side, it becomes easy to bend in a state of excellent aesthetics (a state with few wrinkles or the like).

In the disposable diaper of the present disclosure, the first bending guide line and the second bending guide line have a curved shape, so that when the front crotch region is pinched by both legs of the wearer, the disposable diaper has the first bend guide line and the second bend guide line. Using the bending guide line as the pivot, the width direction of the disposable diaper is also bent toward the wearer. Subsequently, when the disposable diaper is bent with the first bending guide line and the second bending guide line as pivots, both ends of the disposable diaper in the longitudinal direction stand up, and consequently, the disposable diaper easily conforms to the three-dimensional shape of the wearer's body. . It follows the same principle as a picture book that pops out.

On the other hand, in this specification, the curved shape is not limited to a circular arc shape, and the curved shape may have a protruding part, a concave part, or the like.

In the first embodiment, the viewpoint 6' on the front end FE side of one side edge 5a of the first bending guide line 6 exists in the front waist region FW, and the second The viewpoint 7' on the front end FE side of the other side edge 5b of the bending guide line 7 exists in the front waist region FW.

In the disposable diaper of the present disclosure, the starting point on the front side of the two intersection points of the first bending guide line and one side edge and the starting point on the front side of the two intersection points of the second bending guide line and the other side edge are located in the front waist region. By being present, the disposable diaper can easily have a three-dimensional shape along the inguinal region of the wearer (it will be easier to have an inguinal region contact area described later).

In the disposable diaper according to another embodiment of the present disclosure, the front end viewpoints of the first bending guide line and the second bending guide line exist in the front crotch region.

Further, the end point 6'' on the rear end RE side of one side edge 5a of the first bending guide line 6 exists in the rear crotch region RC, and the second bend guide line The end point 7'' on the rear end RE side of the other side edge 5b of (7) exists in the back crotch region RC.

By doing so, the disposable diaper of the present disclosure tends to have a three-dimensional shape along the groin of the wearer. Specifically, since force is applied to the back waist region of the disposable diaper so as to come into close contact with the wearer's waist when worn, the end point on the rear end side of the first bend guide line and the end point on the rear end side of the second bend guide line After this, if it exists in the waist area, the three-dimensional shape along the wearer's groin is likely to be crushed, making it difficult to maintain the shape. On the other hand, if the endpoint exists in the rear crotch region, the three-dimensional shape along the wearer's groin is difficult to collapse, and the fit of the disposable diaper to the wearer can be improved.

In the disposable diaper according to another embodiment of the present disclosure, the end points on the rear end side of the first bend guide line and the second bend guide line exist in the rear waist region.

In the first embodiment, the disposable diaper 1 is placed in the vicinity of one side edge 5a of the absorbent layer 4 (specifically, inside the one side edge 5a) along the longitudinal axis LA of the absorbent layer 4. ), and in the vicinity of the other side edge 5b of the absorbent layer 4 (specifically, inside the other side edge 5b), the absorbent layer It is provided with the 2nd elastic member 22 arrange|positioned along the longitudinal direction L of (4).

Since the disposable diaper of the present disclosure includes the first elastic member and the second elastic member, the disposable diaper is easily bent in the longitudinal direction of the disposable diaper and toward the wearer in a worn state.

On the other hand, in this specification, the vicinity of the side edge includes coincidence with the side edge and the inside and outside of the side edge.

In the first embodiment, the end 21' on the front end FE side of the first elastic member 21 is the first starting point 16a of the first bend guide line 6 (and the second bend guide line ( It is disposed on the front end FE side from the first starting point 16b) of 7), and the end 22' on the front end FE side of the second elastic member 22 is the second bend guide wire 7 It is arranged on the front end FE side of the first starting point 16b of (and the first starting point 16a of the first bending guide wire 6). Further, the end portion 21'' on the rear end RE side of the first elastic member 21 is the second starting point 17a of the first bend guide wire 6 (and the second bend guide wire 7). It is disposed on the rear end RE side of the second starting point 17 b), and the end 22'' on the rear end RE side of the second elastic member 22 is the second bend guide wire 7. It is arranged on the rear end RE side of the second starting point 17b (and the second starting point 17a of the first bend guide wire 6).

By doing so, the disposable diaper is easily bent in the longitudinal direction of the disposable diaper and on the wearer side at the first starting point of the first bending guide line and the first starting point of the second bending guide line (e.g., the third bending guide line), and At the second starting point of the first bending guide line and the second starting point of the second bending guide line (eg, the fourth bending guide line), the disposable diaper is easily bent in the longitudinal direction and toward the wearer.

As the elastic member including the first elastic member and the second elastic member, those known in the art are used, and examples thereof include polyurethane elastic fibers of about 470 to 940 dtex.

In the first embodiment, the first bend guide wire 6 and the second bend guide wire 7 are compressed portions formed by compressing the liquid-permeable layer 2 and the absorbent layer 4 . Specifically, the first bend guide line 6 is an embossed portion as a compression portion formed by intermittently embossing the liquid-permeable layer 2 and the absorbent layer 4 along the first bend guide line 6. (30a) is provided. Similarly, the second bend guide line 7 is an embossed portion 30b as a compression portion formed by intermittently embossing the liquid-permeable layer 2 and the absorbent layer 4 along the second bend guide line 7. ) is provided.

On the other hand, in the first embodiment, the first bend guide wire 6 and the second bend guide wire 7 are also grooves formed by embossing the liquid-permeable layer 2 and the absorbent layer 4 intermittently.

In the disposable diaper of the present disclosure, since the first bend guide wire and the second bend guide wire include a compression portion and/or a groove portion, the thickness of the first bend guide wire and the second bend guide wire is reduced, so that the disposable diaper has a first With the bending guide wire and the second bend guide wire as the pivots, the disposable diaper is easily bent in the width direction and toward the wearer.

In addition, the first bending guide line 6 is a low basis weight region extending along the first bending guide line 6 and having a certain width in the absorbent layer 4, and having a basis weight lower than the average basis weight of the absorbent layer 4. A low basis weight region 28a having Similarly, the second bending guide line 7 is a low basis weight region extending along the second bending guide line 7 and having a certain width in the absorbent layer 4, and having a basis weight lower than the average basis weight of the absorbent layer 4. A low basis weight region 28b having

In the disposable diaper of the present disclosure, the first bend guide wire and/or the second bend guide wire have a low basis weight region, so that the disposable diaper has the first bend guide wire and/or the second bend guide wire as a pivot, The width direction of the disposable diaper also tends to bend towards the wearer.

In an embodiment in which the disposable diaper of the present disclosure has a low basis weight region, the low basis weight region has a basis weight of preferably 30 to 90% by mass, and more preferably 40 to 80% by mass of the average basis weight of the absorbent layer. . When the ratio is less than 30%, the absorbed liquid tends to be difficult to move beyond the first bend guide line and the second bend guide line, and when the ratio exceeds 90%, the disposable diaper first Using the bend guide wire and the second bend guide wire as pivots, there are cases in which it is difficult to bend the disposable diaper in the width direction and toward the wearer.

On the other hand, the average basis weight of the absorbent layer is preferably 300 to 700 g/m 2 .

In the first embodiment, the first bending guide wire 6 has a concave portion 29a formed on the liquid-permeable layer 2-side surface of the absorbent layer 4 in the low basis weight region 28a, and The second bending guide wire 7 has a concave portion 29b formed on the surface of the absorbent layer 4 on the liquid-permeable layer 2 side in the low basis weight region 28b.

By doing so, the disposable diaper of the present disclosure is easily bent toward the concave portion, that is, toward the wearer, with the first bending guide wire and the second bend guide wire as pivots.

Fig. 6 is a sectional view corresponding to the V-V section in Fig. 3 of the absorbent layer 4 and the core wrap 4a before the embossed portions 30a and 30b for the bend guide wire are formed. The absorbent layer 4 shown in FIG. 6 has a low basis weight region 28a which is a concave portion 29a. ) and inclined portions 28ab on both sides thereof. In addition, the absorbent layer 4 shown in FIG. 5 has a low basis weight region 28b which is a concave portion 29b, and the low basis weight region 28b has a bottom portion where an embossed portion 30b for a bending guide wire is formed. 28ba and inclined portions 28bb on both sides thereof.

In the low basis weight regions 28a and 28b, the basis weight of the bottom portions 28aa and 28ba is the smallest, and in the inclined portions 28ab and 28bb, the basis weight gradually increases as the distance from the bottom portions 28aa and 28ba increases. .

On the other hand, the basis weight of the place where the first embossed portion 13 and the second embossed portion 14 are formed is the same as the area around the first embossed portion 13 and the second embossed portion 14. do.

By forming the low basis weight region, the disposable diaper is easily bent in the width direction of the disposable diaper and toward the wearer side with the first bending guide line and the second bend guide wire as pivots.

The low basis weight region can be formed, for example, according to the method described in Japanese Unexamined Patent Publication No. 2010-233839 by the same applicant.

In the first embodiment, the first bend guide line 6 and the second bend guide line 7 are provided along the first bend guide line 6 and the second bend guide line 7, respectively, in the liquid-permeable layer. (2), core wrap 4a, and embossed portions 30a and 30b formed by intermittently embossing a part of the low basis weight regions 28a and 28b of the absorbent layer 4, but the disposable diaper of the present disclosure. has an embossed portion formed by continuously or intermittently embossing the layer to be embossed. It is preferable that the said embossing part was formed by intermittently embossing the layer to be embossed from a viewpoint that a wearer does not feel hardness.

The layer to be embossed is not particularly limited as long as the first bend guide wire and the second bend guide wire function as the bend guide wire, and an absorption layer; absorbent layer and core wrap; absorbent layer, core wrap and liquid permeable layer; absorbent layers, core wraps, auxiliary sheets, and liquid-permeable layers; and the like.

In addition, a part of the low basis weight region of the absorbent layer may be embossed, or the whole may be embossed.

In an embodiment in which the first bending guide wire and the second bending guide wire have at least the absorbent layer provided with the above-described embossed portion and the above-described low basis weight region, the absorbent layer includes pulp fibers and a high-absorbent material, and the low basis weight It is preferable that the mass ratio of the superabsorbent material in the region is lower than the mass ratio of the superabsorbent material in regions other than the low basis weight region in the absorbent layer. By doing so, it is possible to form an embossed portion on the first bend guide wire and the second bend guide wire without breaking the core wrap or the like, and the first bend guide wire and the second bend guide wire function as a bend guide wire. it becomes easier to do

Examples of the superabsorbent material include starch-based, cellulose-based, and synthetic polymer-based superabsorbent materials.

The mass ratio of the superabsorbent material is measured as follows.

(1) A predetermined amount of low basis weight sample is cut out from the low basis weight region of the absorbent layer, and its area s ₀ (cm 2 ) and mass m ₀ (g) are measured.

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

Water absorption A _lb (%) is expressed by the following formula:

A _lb (%)=100×(m ₁ -m ₀ )/s ₁

calculated by

(3) A predetermined amount of sample is cut out from the region other than the low basis weight region of the absorbent layer, and the water absorption A _nb (%) is calculated in the same manner as for the low basis weight sample.

(4) If water absorption A _lb (%) < water absorption A _nb (%), it is determined that the mass ratio of the superabsorbent material in the low basis weight region is lower than the mass ratio of the superabsorbent material in the region other than the low basis weight region in the absorbent layer do.

On the other hand, the measurement is performed at 20°C.

The disposable diaper of the present disclosure is not limited to the above embodiment, and in a disposable diaper according to another embodiment of the present disclosure, a low basis weight region can be formed while keeping the height of the absorbent layer constant in principle by lowering the fiber density of the absorbent layer. can In a disposable diaper according to another embodiment of the present disclosure, the first bend guide line and the second bend guide line extend along the first bend guide line and the second bend guide line in the absorbent layer, respectively, and have a constant width. It has a low basis weight region, and in the low basis weight region, the absorbent layer has a fiber density lower than the average fiber density of the absorbent layer, thereby maintaining a constant height of the absorbent layer in principle and having a basis weight lower than the average basis weight of the absorbent layer. Even by lowering the fiber density of the absorbent layer, the first bend guide wire and the second bend guide wire can be bent guide wires.

1 to 5, the low basis weight regions 28a and 28b are groove-shaped concave portions 29a and 29b formed on the surface of the absorbent layer 4 on the liquid-permeable layer 2 side, respectively. However, in the disposable diaper of the present disclosure, the concave portion is not limited to a groove-shaped one.

FIG. 8 is a view for explaining a disposable diaper according to another embodiment of the present disclosure, and corresponds to a cross-sectional view in a V-V section of FIG. 3, but is a view before an embossed portion for a bend guide wire is formed.

The absorbent layer 4 shown in FIG. 8 includes an absorbent layer 4' between the first bend guide line 6 and the second bend guide wire 7, and an absorber layer outside the first bend guide line 6 ( 4'') and an absorption layer 4''' outside the second bend guide wire 7, and the first bend guide wire 6 and the second bend guide wire 7 are each It has slit portions 31a and 31b of the absorbent layer 4 extending along the first bend guide line 6 and the second bend guide line 7 . The slit portion 31a is partitioned by the absorbent layer 4' and the absorbent layer 4'', and the slit portion 31b is partitioned by the absorbent layer 4' and the absorbent layer 4'''.

By doing so, in the disposable diaper of the present disclosure, the disposable diaper is easily bent in the width direction and toward the wearer side with the first bend guide line and the second bend guide wire as pivots.

In an embodiment in which the disposable diaper of the present disclosure includes an absorbent layer and a core wrap, and the first bend guide wire and/or the second bend guide wire include a slit portion, in the slit portion, one side of the absorbent layer It is preferable that the core wrap and the core wrap on the other side of the absorbent layer are bonded (bonding between core wraps). This is because even when the wearer moves, the distance between the absorbent layers adjacent to the slit portion is maintained constant, and the first bend guide wire and/or the second bend guide wire can continue to function.

For bonding between core wraps, bonding by hot melt adhesives such as synthetic rubber (SIS, SBS, SEPS, SEBS), EVA, polyolefin (PE, PP), etc., core wrap by embossing Thermal fusion etc. are mentioned.

Bonding of the core wrap is preferably maintained even when wet. This is because the first bend guide wire and/or the second bend guide wire can continue to function even when the disposable diaper absorbs liquid such as urine.

Bonding between core wraps at the time of wetness can be evaluated as follows.

(1) Measurement of absorption capacity

(i) A sample (absorbent layer and core wrap) is taken out of the disposable diaper to be evaluated, and its mass: M ₀ (g) is measured. On the other hand, when taking out the absorbent layer, the elastic member is removed as much as possible.

(ii) Put the sample in a 400 mesh nylon bag, immerse it in 1000 mL of physiological saline (concentration: 0.9% by mass) for 30 minutes, set the sample so that the skin side of the sample faces the outside of the centrifuge, and (850 rpm) for 2 minutes.

(iii) Measure the mass: M ₁ (g) of the sample taken out of the nylon bag.

(iv) the absorption capacity of the sample, the following formula:

Absorption capacity (g)=M ₁ (g)-M ₀ (g)

calculated by

(2) Confirmation of bonding between core wraps after liquid absorption

(i) Samples (absorbent layer and core wrap) are taken out of the disposable diaper to be evaluated.

(ii) In a tray slightly larger than the sample, physiological saline solution (concentration: 0.9% by mass) in an amount equal to 70% of the above liquid absorption capacity is placed, and the sample is immersed in the physiological saline solution on the tray with the skin side of the sample facing down. .

(iii) After being left for 5 minutes, the sample is taken out, and in the slit portion, it is checked whether or not the core wraps are joined to each other.

On the other hand, the said measurement is performed at 20 degreeC.

In the disposable diaper of the present disclosure, it is preferable that core wraps are bonded to each other in the slit portion after the above measurement.

Further, in the first embodiment, the disposable diaper 1 includes a pair of three-dimensional gathers 25 on both sides of the disposable diaper 1 in the longitudinal direction L. Each of the pair of three-dimensional gathers 25 is fixed with a free end 25a closer to the longitudinal axis of the disposable diaper 1 and farther from the longitudinal axis LA of the disposable diaper 1 than the free end 25a. It has a stage 25b. 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 has elasticity in the longitudinal direction L of the disposable diaper 1. At both ends, it is fixed to the top sheet 2 via fixing parts 32.

In the first embodiment, in the deployed state of the disposable diaper 1, the inguinal area contact area 10 does not overlap with the pair of three-dimensional gathers 25 in the thickness direction of the disposable diaper 1.

By doing so, in the disposable diaper of the present disclosure, the groin contact area easily maintains its shape, and the disposable diaper easily conforms to the three-dimensional shape of the wearer's body when worn.

In addition, in the disposable diaper of the present disclosure, the first bend guide line and the second bend guide line are preferably line symmetric with respect to the longitudinal axis of the absorbent layer. The wearer's body is basically symmetrical, and this is because of the point of view of wearing comfort.

In the disposable diaper of the present disclosure, each of the first bend guide line and the second bend guide line preferably does not cross the longitudinal axis of the absorbent layer. Inguinal contact area formed by the first starting point and the second starting point of the first bending guide line and the first starting point and the second starting point of the second bending guide line (the disposable diaper of the present disclosure, the third bending guide line and the fourth bending guide line) In the embodiment including the guide line, the inguinal contact area formed by the first bend guide line, the second bend guide line, the third bend guide line, and the fourth bend guide line) is formed on the longitudinal axis of the absorbent layer. Because.

On the other hand, in the disposable diaper of the present disclosure, one or both of the first bending guide wire and the second bend guide wire may further include an additional starting point between the first starting point and the second starting point. Since the disposable diaper has a new bending guide line between the third bending guide line and the fourth bending guide line for bending the disposable diaper in its longitudinal direction and toward the wearer side, the disposable diaper is worn on the wearer's body. It is easier to have a shape along the three-dimensional shape of .

As the additional starting point, in the direction from the front end to the rear end, the distance from the longitudinal axis does not change as it approaches the additional starting point or moves away from the longitudinal axis, and the length axis line as it moves away from the additional starting point. can be heard approaching

As shown in the first embodiment, the disposable diaper of the present disclosure is partitioned by the first starting point and the second starting point of the first bend guide line and the first starting point and the second starting point of the second bend guide line in the wearing state. An approximately rectangular inguinal contact area (approximately rectangular inguinal contact area surrounded by the first bending guide line, the second bending guide line, the third bending guide line, and the fourth bending guide line) and the inguinal contact area It is preferable to include a substantially quadrangular truncated shape portion with the inguinal contact region as the upper side by the adjacent inguinal region. This is because in the wearing state, it can follow the three-dimensional shape of the wearer's body, specifically, the shape of the groin. In addition, since the disposable diaper conforms to the shape of the inguinal region, urination can be received in a wider area, and leakage of urination is reduced.

The disposable diaper of the present disclosure can be manufactured by combining methods known in the art. For example, the absorbent layer of the first embodiment can be manufactured according to the method described in Japanese Unexamined Patent Publication No. 2010-233839 by the same applicant.

1: disposable diaper 2: liquid-permeable layer
3: liquid impermeable layer 4: absorbent layer
4a: core wrap 5a: one side edge
5b: other side edge 6: first bending guide line
7: second bending guide line 8: third bending guide line
9: fourth bending guide line 10: inguinal contact area
11: region around the inguinal region 12: approximately quadrangular truncated shape part
13: first embossing part 14: second embossing part
15: central area 16: first starting point
17: second starting point 21: first elastic member
22: second elastic member 23, 24: cutout
25: three-dimensional gather 26: elastic member
27: tape fastener 28: low basis weight area
29: concave portion 30: embossed portion for bending guide wire
31: slit portion F: front road
R: back road FW: front torso area
FC: Front crotch area RW: Rear torso area
RC: posterior crotch area LA: longitudinal axis

Claims (14)

A liquid-permeable layer, a liquid-impermeable layer, and an absorbent layer having one side edge, the other side edge, a longitudinal axis, a front end and a rear end therebetween, comprising a front waist region, a rear waist region, and the front waist region. A disposable diaper partitioned into a front crotch region and a rear crotch region between a waist region and a rear waist region,
the disposable diaper, in the front crotch region of the absorbent layer, a first bending guide line disposed between the longitudinal axis and one side edge and extending in the direction of the longitudinal axis, and between the longitudinal axis and the other side edge; and a second bending guide line extending in the direction of the longitudinal axis,
Each of the first bend guide wire and the second bend guide wire includes a compressed portion, a groove portion, or a slit portion of the absorbent layer, and
The disposable diaper has a compression portion formed by compressing the absorbent layer in a central region between the first bend guide line and the second bend guide line,
The compression portion of the central region includes an embossed portion formed by embossing the absorbent layer,
The disposable diaper characterized in that the embossed portion extends in one or a plurality of directions that are neither in a direction parallel to the direction of the longitudinal axis nor in a direction orthogonal to the direction of the longitudinal axis. The disposable diaper according to claim 1, wherein the embossed portion is a linear embossed portion. The method according to claim 1 or 2, wherein each of the first bend guide wire and the second bend guide wire has a first starting point on the front end side and a second start point on the rear end side, and the first bend guide wire and the second start point on the rear end side 2 Each of the bending guide lines, in the direction from the front end to the rear end, approaches the longitudinal axis as it approaches the first starting point, and does not change its distance from the longitudinal axis as it moves away from the first starting point, or Or away from the length axis, each of the first bend guide line and the second bend guide line, in a direction from the front end to the rear end, approaches the length axis line as it approaches the second starting point, or the length axis line wherein the distance from the longitudinal axis does not change and the distance from the longitudinal axis increases as the distance from the second starting point increases. The disposable diaper according to claim 3, wherein the first and second starting points of the first bending guide line and the first and second starting points of the second bending guide line are located in the front crotch region. The method according to claim 3, wherein the second origin points of the first bend guide line and the second bend guide line each have a shorter distance from the length axis than the first origin points of the first bend guide line and the second bend guide line, respectively. disposable diapers. The disposable device according to claim 3, wherein the second starting points of the first bending guide line and the second bending guide line have a distance from the length axis that is shorter than the distances from the one side edge and the other side edge, respectively. diaper. The method of claim 3, wherein the disposable diaper further comprises a third bending guide wire and a fourth bend guide wire extending in the width direction of the disposable diaper, wherein the third bend guide wire comprises a first bend guide wire and A disposable diaper comprising a first starting point of a second bend guide line, and wherein a fourth bend guide line includes a first bend guide line and a second origin point of a second bend guide line. The method of claim 7, wherein one or both of the third bending guide line and the fourth bending guide line include a pair of cutouts extending from both the one side edge and the other side edge toward the length axis disposable diapers. The disposable diaper according to claim 3, wherein the disposable diaper has an inguinal contact region defined by first origin points and second origin points of the first bend guide line, and first and second origin points of the second bend guide line; A, in a worn state, a disposable diaper comprising a quadrangular frustum formed by the inguinal contact area and an inguinal peripheral area adjacent to the inguinal contact area and having the inguinal contact area as an upper side. The disposable diaper according to claim 1 or 2, wherein the first bend guide line and the second bend guide line each have a curved shape protruding from the one side edge and the other side edge toward the length axis line. . The disposable diaper according to claim 10, wherein the front end viewpoints of the one side edge and the other side edge of the first bending guide line and the second bending guide line, respectively, are present in the front waist region. . 11. The disposable diaper according to claim 10, wherein the rear end points of the one side edge and the other side edge of the first bending guide line and the second bending guide line, respectively, are present in the rear crotch region. . The disposable diaper according to claim 1 or 2, wherein the disposable diaper includes a first elastic member and a second elastic member disposed in the vicinity of the one side edge and the other side edge, respectively, along the direction of the longitudinal axis. A disposable diaper comprising: delete

Images