WO2016157653A1

WO2016157653A1 - Absorbent article

Info

Publication number: WO2016157653A1
Application number: PCT/JP2015/086004
Authority: WO
Inventors: 工藤　淳; 雅史北川; 健太谷口; 紗恵子秋山; 望寺杣
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-03-31
Filing date: 2015-12-24
Publication date: 2016-10-06
Also published as: KR101913534B1; MY170227A; JP2016189851A; CN107427391A; KR20170132852A; JP6373216B2; CN107427391B

Abstract

An absorbent article having a thickness direction, a widthwise direction and a lengthwise direction that are perpendicular to one another, and having an absorbent body provided with an absorbent core having liquid-absorbing fibers. The absorbent body is provided with a folding line that that guides in a manner such that folding occurs, projects toward the skin-side in the thickness direction, and extends in the lengthwise direction. The absorbent core has a low-density section that exhibits a lower distribution density of liquid-absorbing fibers than do the surrounding sections and is formed in the location of the folding line in the widthwise direction, a skin-side layer positioned on the skin side in the thickness direction relative to the low-density section, and a non-skin-side layer positioned on the non-skin side in the thickness direction relative to the low-density section. However, the liquid-absorbing fibers are present in the low-density section. The skin-side layer is folded in a manner such that the section corresponding to the folding line projects toward the skin side in the thickness direction.

Description

Absorbent articles

The present invention relates to an absorbent article such as a sanitary napkin.

Sanitary napkins are known as absorbent articles that absorb excreted fluid such as menstrual blood. The napkin has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other. The napkin has an absorbent core mainly composed of liquid absorbent fibers between a liquid-permeable top sheet and a liquid-impermeable back sheet.

Japanese Patent Application Laid-Open No. 2012-157459

Here, as an example of such a sanitary napkin, there is a napkin 1 ′ that is bent so as to protrude toward the skin side in the thickness direction along a fold line LB extending in the longitudinal direction. According to such a napkin 1 ′, when it is attached to the crotch 201K as shown in the schematic front view of FIG. 1, the portion protruding to the skin side along the broken line LB is the labia where the excretory opening 201He such as the vaginal opening exists. Can be brought into contact with or between the labia, thereby providing good fit.

However, in order to attach the sanitary napkin 1 ′ to the crotch 201K, when pulling up an underwear (not shown) such as a short with the napkin 1 ′ placed and fixed on the crotch portion toward the crotch 201K, depending on circumstances. There is a possibility that the shape of the napkin 1 ′ may change from the shape protruding toward the skin as described above to another shape. Further, when the napkin 1 'is worn, an external force directed inward in the width direction such as a crotch tightening force from the wearer 201 acts on the napkin 1'. There is a possibility of changing from a shape protruding to the skin side to another shape.
When the shape changes in this way, the portion of the napkin 1 'that protrudes toward the skin cannot be properly brought into contact with or between the labial areas. Will get worse.

On the other hand, the napkin 1 ′ is required to have good absorbability of excretory fluid in addition to the above fit, that is, it is not allowed to sacrifice the absorbency for improving the fit.

The present invention has been made in view of the above problems, and its purpose is to stably maintain the shape of the absorbent article in a bent shape that protrudes to the skin side along the broken line, The object is to have good absorbability.

The main invention for achieving the above object is:
An absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other,
Having an absorbent body with an absorbent core with liquid absorbent fibers;
A fold line is provided along the longitudinal direction for guiding the absorber to protrude and bend toward the skin side in the thickness direction,
The absorbent core is formed at the position of the broken line in the width direction, and the distribution density of the liquid absorbent fibers is lower than the surrounding portion, and the thickness direction is lower than the low density portion. A skin side layer located on the skin side, and a non-skin side layer located on the non-skin side in the thickness direction than the low density portion,
In the low density portion, the liquid absorbent fiber exists,
The skin-side layer is an absorbent article that is bent so that a portion corresponding to the broken line protrudes to the skin side in the thickness direction.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

According to the present invention, it is possible to stably maintain the shape of the absorbent article in a bent shape that protrudes to the skin side along the broken line, while also achieving good absorbency.

It is a schematic diagram of the front view for demonstrating that the napkin 1 'bent so that it may protrude to the skin side of the thickness direction along the broken line LB has favorable fitting property. It is the schematic plan view which looked at the sanitary napkin 1 as an example of the absorbent article of this embodiment from the skin side of the thickness direction. It is the schematic plan view which looked at the napkin 1 from the non-skin side of the thickness direction. FIG. 4 is a schematic exploded view taken along arrows IV-IV in FIG. 2. It is the schematic plan view which looked at the absorber 10 from the non-skin side of the thickness direction. 6A is a schematic diagram showing the bent state of the absorbent body 10 as viewed from the arrow VI-VI in FIG. 2, and FIG. 6B is a schematic diagram showing the bent state of the napkin 1 as seen from the arrow VI-VI in FIG. It is. FIG. 7A is a schematic view of a cut surface obtained by cutting the absorbent core 11 along the width direction, and is a schematic diagram showing an enlarged portion corresponding to the broken line LB in the cut surface. It is an electron micrograph of the B section of Drawing 7A. 4 is a table 1 showing specifications and results of an experiment for obtaining a preferable range of fiber density of the absorbent core 11. It is Table 2 which shows the item and result of an experiment which calculates | requires the conditions in which the absorber 10 is maintained in the shape bent sharply by the broken line LB. FIG. 10A is a schematic plan view of a test piece for measuring bending resistance used in the experiment, and FIG. 10B is a view taken along the line BB in FIG. 10A. FIG. 11A is a schematic front view of a test piece for evaluating the maintenance stability of a mountain fold shape, and FIG. 11B is a schematic front view of the test piece in which the mountain fold shape is deformed to round by its own weight.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other,
Having an absorbent body with an absorbent core with liquid absorbent fibers;
A fold line is provided along the longitudinal direction for guiding the absorber to protrude and bend toward the skin side in the thickness direction,
The absorbent core is formed at the position of the broken line in the width direction, and the distribution density of the liquid absorbent fibers is lower than the surrounding portion, and the thickness direction is lower than the low density portion. A skin side layer located on the skin side, and a non-skin side layer located on the non-skin side in the thickness direction than the low density portion,
In the low density portion, the liquid absorbent fiber exists,
The skin-side layer is an absorbent article that is bent so that a portion corresponding to the broken line protrudes to the skin side in the thickness direction.

According to such an absorbent article, the shape of the absorbent article can be stably maintained in a bent shape that protrudes to the skin side along the broken line. Details are as follows. First, the said skin side layer of an absorptive core is bent so that the part corresponding to a broken line may protrude to the skin side. Therefore, a signature that protrudes toward the skin side can be attached to the absorbent article. Moreover, the low density part is located in the non-skin side of the skin side layer. Therefore, even when an external force facing the inside in the width direction such as a crotch force acts on the article while wearing the absorbent article, the skin side layer has a bent shape protruding toward the skin side. It can be bent even more while maintaining. That is, when the skin side layer bends further, the inner peripheral side portion of the skin side layer can quickly move toward the low density portion, and thus when the skin side layer bends further, the above inner circumference The situation where the side part loses its place and shows great resistance is avoided. Therefore, the shape of the absorbent article can be stably maintained in a bent shape that protrudes toward the skin along the broken line.
Moreover, since the liquid absorptive fiber exists in the low density portion, the excretory fluid absorbed by the skin side layer can be quickly drawn toward the non-skin side layer. And thereby, the absorbed excretion can be quickly diffused in the thickness direction, and as a result, the absorbent article can exhibit good absorbency.

Such an absorbent article,
In the non-skin side layer, each part located on both sides of the polygonal line protrudes to the skin side in the thickness direction, and a part located between the parts projects to the non-skin side in the thickness direction. Preferably, the non-skin side layer is bent in shape.

According to such an absorbent article, even when an external force facing inward in the width direction such as a crotch force acts on the article while wearing the absorbent article, the non-skin side described above The layer can be rapidly reduced and deformed in the width direction while maintaining the above M-shape. Therefore, it is reliably prevented that the non-skin side layer inhibits the maintenance of the state of the skin side layer that is bent so as to protrude to the skin side, and thus the skin side layer stably stabilizes the bent shape. Can be maintained.

Such an absorbent article,
The average value of the fiber density of the liquid absorbent fiber of the absorbent core is preferably 0.092 (g / cm ³ ) or more.

According to such an absorbent article, since the average value of the fiber density of the absorbent core is 0.092 (g / cm ³ ) or more, the low density is obtained by bending the core along the broken line. The part can be formed reliably.

Such an absorbent article,
When the dimension in the thickness direction at the position corresponding to the broken line in the width direction is compared between the skin side layer and the non-skin side layer, the dimension of the skin side layer is the non-skin side layer. It is desirable to be larger than

According to such an absorbent article, the capacity of the excretory fluid to be absorbed is large in the skin side layer based on the large dimension in the thickness direction. Therefore, the skin side layer can quickly absorb the excretion fluid such as menstrual blood excreted from the excretion opening such as the vaginal opening, and can diffuse to the surrounding part such as the non-skin side layer, Leakage of excretory fluid from the absorbent article can be effectively prevented.

Such an absorbent article,
The absorber has a skin side sheet fixed to the skin side of the absorbent core,
It is desirable that the skin side sheet bends along the fold line together with the absorbent core.

According to such an absorbent article, the skin side sheet is bent along the fold line together with the absorbent core. Therefore, the skin side sheet can make up for the rigidity of the core so that the shape of the core does not collapse while keeping the bent state of the absorbent core from being hindered. As a result, it is possible to effectively prevent unnecessary deformation such as so-called kinking of the absorbent core.

Such an absorbent article,
The skin-side sheet is a nonwoven fabric having thermoplastic resin fibers,
The absorbent core has a thermoplastic resin fiber and a cellulosic water absorbent fiber as the liquid absorbent fiber,
It is desirable that the thermoplastic resin fibers of the skin side sheet and the thermoplastic resin fibers of the absorbent core are joined.

According to such an absorbent article, the skin-side sheet has thermoplastic resin fibers, the absorbent core also has thermoplastic resin fibers, and the thermoplastic resin fibers are joined to each other. Here, these thermoplastic resin fibers are similar to each other. Therefore, it can be firmly joined by squeezing or the like, whereby the sheet is firmly joined to the core. And as a result, the sheet | seat can supplement the rigidity more effectively so that the shape of an absorptive core may not collapse.

Such an absorbent article,
When the bending resistance is measured by the Gurley method defined in JIS L1085,
The portion corresponding to the broken line protrudes to the non-skin side in the thickness direction, rather than the bending resistance when the absorber is bent so that the portion corresponding to the broken line protrudes to the skin side in the thickness direction. Thus, it is desirable that the bending resistance when the absorber is bent is larger by 0.50 mN or more.

According to such an absorbent article, the bending resistance when bent to the opposite side is 0.50 mN or more than the bending resistance when bending the absorbent body so as to protrude to the skin side. . Therefore, it becomes easy to maintain the shape which protruded to the skin side along the broken line and was bent sharply. As a result, the protruding portion comes into contact with the labia where the excretory opening such as the vaginal opening is present or easily enters between the labia.

Such an absorbent article,
On the skin side in the thickness direction from the absorbent core, a sheet that has been stretched to develop the stretchability in the width direction, or a sheet in which slits along the longitudinal direction are formed is disposed. Is desirable.

According to such an absorbent article, the sheet disposed on the skin side of the absorbent core has good extensibility in the width direction. In other words, in the case of the former sheet, stretchability is exhibited in the stretching process and good extensibility is achieved. In the case of the latter sheet, good extensibility is imparted in the width direction based on the slit. Has been. Therefore, it is prevented that the said sheet | seat inhibits that the absorptive core bends so that it may protrude to the skin side along a broken line, and, thereby, the shape of the absorbent article bends so that it may protrude to the skin side. Can be maintained stably.

Such an absorbent article,
The absorbent body and the top sheet disposed on the skin side in the thickness direction from the absorbent body are joined and integrated by a plurality of squeezed portions formed by squeezing from the skin side in the thickness direction of the top sheet. Has been
As for the part of the above-mentioned broken line in the above-mentioned absorptive core of the above-mentioned absorber, it is desirable that the part where the above-mentioned pressing part is not formed exists.

According to such an absorbent article, it can suppress that the bending rigidity of the part of the broken line in an absorptive core will be raised by said pressing part. And it becomes difficult to prevent that the shape of an absorptive core changes into the bent shape which protrudes to the skin side along a broken line, As a result, the said bent shape can be stabilized.
Moreover, the drawability of the excreted liquid excreted on the top sheet to the absorber is enhanced, and thus the top sheet can exhibit good liquid repellency.

Such an absorbent article,
It is desirable that none of the squeezed portions is formed in the broken line portion of the absorbent core of the absorbent body.

According to such an absorbent article, it is possible to reliably prevent the bending rigidity of the portion of the broken line in the absorbent core from being increased by the compressed portion.

Such an absorbent article,
It is desirable that the broken line extends over the entire length of the absorbent core in the longitudinal direction.

According to such an absorbent article, since the above-mentioned broken line extends over the entire length in the longitudinal direction of the absorbent core, the shape of the absorbent article projects to the skin side along the broken line. Such a bent shape can be maintained more stably.

Such an absorbent article,
A sheet is provided on the non-skin side of the non-skin side layer in the thickness direction, and the sheet is bent into the M shape integrally with the non-skin side layer,
When the absorbent article is viewed from the non-skin side in the thickness direction, the sheet has a valley fold line at a position corresponding to each of the non-skin-side layers protruding to the skin side. It is desirable that a mountain fold line is formed along the longitudinal direction at a position corresponding to the portion protruding toward the non-skin side while being formed along the direction.

According to such an absorbent article, the above sheet is bent into an M shape integrally with the M-shaped non-skin side layer. Therefore, even when an external force facing the inside in the width direction such as a crotch force acts on the absorbent article, the sheet can be quickly reduced and deformed in the width direction together with the non-skin side layer. Accordingly, it is possible to prevent the maintenance of the state of the skin side layer bent so as to protrude to the skin side.

=== This Embodiment ===
FIG. 2 thru | or FIG. 6B is explanatory drawing of the sanitary napkin 1 as an example of the absorbent article of this embodiment. FIG. 2 is a schematic plan view of the napkin 1 viewed from the skin side in the thickness direction, and FIG. 3 is a schematic plan view of the napkin 1 viewed from the non-skin side in the thickness direction. FIG. 4 is a schematic exploded view taken along arrows IV-IV in FIG. Furthermore, FIG. 5 is a schematic plan view of the absorber 10 as seen from the non-skin side in the thickness direction. FIG. 6A is a schematic diagram showing the bent state of the absorbent body 10 as viewed in the direction of arrows VI-VI in FIG. 2, and FIG. 6B shows the folded state of the napkin 1 as seen in the direction of arrows VI-VI in FIG. It is a schematic diagram.

As shown in FIGS. 2 and 4, the napkin 1 is a sheet-like member that is vertically long in plan view and has a longitudinal direction, a width direction, and a thickness direction. Moreover, in the napkin 1, the liquid-permeable top sheet 20, the liquid-absorbent absorber 10, and the liquid-impermeable back sheet 30 are sequentially formed from the skin side in the thickness direction to the non-skin side. And are stacked. Each of these

members

20, 10, and 30 is joined to a member adjacent in the thickness direction with an adhesive HMA such as a hot melt adhesive. Examples of the application pattern of the adhesive HMA include an Ω pattern, a spiral pattern, a stripe pattern, and the like, and the same applies to other adhesives HMA that appear later. Hereinafter, a direction corresponding to the abdomen side of the wearer 201 in the longitudinal direction is also referred to as “front side”, and a direction corresponding to the same back side is also referred to as “rear side”.

As shown in FIG. 2, the planar size of the top sheet 20 and the back sheet 30 is larger than the planar size of the absorbent body 10. Therefore, the outer

peripheral edge portions

20e and 30e (see the dot pattern portion in FIG. 2) of both the

sheets

20 and 30 protrude from the absorber 10 outward in the longitudinal direction and outward in the width direction, respectively. And the absorber 10 is hold | maintained between these both

sheets

20 and 30 by joining the said outer

peripheral edge parts

20e and 30e by adhesion | attachment or welding.

In this example, the planar shapes of both

sheets

20 and 30 are the same. The

sheets

20 and 30 have a shape in which a substantially central portion in the longitudinal direction protrudes on both sides in the width direction, and the protruding

portions

20w and 30w mount the napkin 1 on an undergarment (not shown). It functions as so-called

wing portions

1w and 1w provided when the device is fixed. That is, as shown in FIGS. 3 and 4, on the non-skin side surface of the portion 30 w corresponding to each wing portion 1 w in the back sheet 30, an adhesive portion 40 w for fixing the napkin 1 to the underwear is an appropriate adhesive. For example, it is formed in a substantially rectangular shape. Moreover, the adhesive part 40c of the same purpose is also formed in the part 30c between the

wing parts

1w and 1w in the non-skin side surface of the back sheet 30 with a suitable adhesive, for example, in a plurality of strips along the longitudinal direction. Yes. However, the arrangement pattern of the

adhesive portions

40w and 40c is not limited to this.

As an example of the material of the top sheet 20, an appropriate non-woven fabric such as an air-through non-woven fabric can be mentioned. In this example, an air-through non-woven fabric is used. However, it is not limited to this. That is, any other sheet may be used as long as it is a liquid-permeable flexible sheet. Moreover, as an example of the raw material of the back sheet 30, an appropriate resin film such as polyethylene (PE) can be cited. In this example, a PE film is used. However, it is not limited to this. That is, other sheets may be used as long as they are flexible liquid-impermeable sheets.

Further, as shown in FIG. 2, a plurality of squeezed portions E, E... Are formed on the skin side surface of the top sheet 20 from the skin side, whereby the top sheet 20 and the absorbent body 10 are thick together. It is squeezed in the vertical direction and joined and integrated. And in this example, as this pressing part E, two types of pressing parts EL and ED are formed. One pressing part E is a linear pressing part EL. And the said linear pressing part EL, EL ... is formed in multiple numbers along the outer periphery part of the absorber 10, and, as a whole, has comprised the substantially cyclic | annular form long in a longitudinal direction. On the other hand, the other pressing part E is a dot-like pressing part ED. And the said point-like pressing part ED, ED ... is discretely formed in the substantially closed area | region AEL which said several linear pressing part EL, EL ... divides on the top sheet 20. FIG. In addition, in this example, the planar shape of each point-like pressing part ED is a circle having a diameter of 1 mm, and the arrangement pattern of the pressing parts ED, ED... Is a staggered arrangement pattern. Not limited to. Further, the point-like pressing part ED and the linear pressing part EL may be omitted.

As shown in FIG. 5, the absorbent body 10 has the same absorbent core 11 in which a liquid absorbent fiber or the like is formed into a vertically long shape in plan view as an example of a predetermined shape and covers the skin side surface of the core 11. The core 11 has a skin-side sheet 12 that is substantially the same in planar shape, and the core 11 and a non-skin-side sheet 13 that is substantially the same in planar shape so as to cover the core 11 from the non-skin side surface. And as shown in FIG. 4, each sheet |

seat

12,13 is each joined and integrated with the absorbent core 11 with adhesive HMA, such as a hot-melt-adhesive agent, Thereby, each sheet |

seat

12,13 is Unnecessary deformation such as so-called twisting or collapsing of the absorbent core 11 is prevented.

The absorbent core 11 has, for example, cellulosic water-absorbing fibers and thermoplastic resin fibers as liquid absorbent fibers in a basis weight range of 100 (g / m ² ) to 400 (g / m ² ). Are mixed with each other. In this example, pulp fibers are used as an example of the former, and as an example of the latter, a so-called sheath core structure composite fiber having a sheath of polyethylene (PE) and a core of polyethylene terephthalate (PET) is used at a fiber length of 30 mm. There is no limitation to this. For example, rayon fiber may be used as the former, and single fiber of polyethylene (PP) or single fiber of PE may be used as the latter. Furthermore, the latter thermoplastic resin fiber may be omitted.
In this example, the core 11 is made of, for example, a superabsorbent polymer (so-called SAP) as an example of a liquid-absorbing granular material in addition to the liquid-absorbing fiber, for example, a basis weight of 5 (g / m ² ) to 50 (g / m ² ). m ² ), but this SAP can also be omitted.
Furthermore, in this example, an air-through nonwoven fabric having a basis weight in the range of 10 (g / m ² ) to 70 (g / m ² ), for example, is used as the skin-side sheet 12, but it is a liquid-permeable and flexible sheet. If there is, it is not limited to this. That is, other types of non-woven fabrics may be used, or tissue paper or the like may be used. In addition, the skin side sheet 12 can be omitted. Further, as the non-skin side sheet 13, for example, an SMS (spunbond / meltblown / spunbond) nonwoven fabric having a basis weight in the range of 10 (g / m ² ) to 50 (g / m ² ) is used. The sheet is not limited to this, that is, other types of non-woven fabrics may be used, or tissue paper or the like may be used. Can also be omitted.

In such an absorbent body 10, as shown in FIG. 5, a point-like compressed portion ED 10 is formed by pressing from the non-skin side. That is, in this example, since the absorbent body 10 has the skin side sheet 12, the absorbent core 11, and the non-skin side sheet 13, when these three are squeezed together in the thickness direction, Said pressing part ED10 is formed. As a result, the rigidity is enhanced, and as a result, unnecessary deformation such as twisting can be suppressed. In this example, the planar shape of the pressing part ED10 is a circle having a diameter of 1.2 mm, and the arrangement pattern of the pressing parts ED10, ED10... Is a staggered pattern, but is not limited to this. In addition, the maximum value of the thickness of the absorbent body 10 in which the compressed portion ED10 and the compressed portions EL and ED are formed is, for example, in the range of 0.5 mm to 5 mm, but is not limited thereto.

On the other hand, as shown in FIG. 5 and FIG. 6A, the absorbent body 10 has a fold line LB formed in a straight line along the longitudinal direction over the entire length in the longitudinal direction. Thus, as shown in FIG. 6A, the absorbent body 10 is guided to project and bend along the broken line LB toward the skin side in the thickness direction. Accordingly, as shown in FIG. 6B, the napkin 1 is also guided so that the center position in the width direction protrudes toward the skin and bends. Therefore, as shown in FIG. 1, when the wearer 201 pulls up the shorts (not shown) in which the napkin is placed and fixed on the crotch part toward the crotch 201K in order to attach the napkin 1 to the crotch 201K, The portion protruding to the skin abuts on the labia where the excretory opening 201He such as the vaginal opening is present or enters between the labial areas, whereby the napkin 1 can exhibit a good fit.

However, as explained at the beginning, the shape in which the center position in the width direction protrudes to the skin side can change during the pulling process of the shorts or during wearing of the napkin 1, and if it changes, the napkin 1 Becomes difficult to come into contact with the labia or enters between the labia, resulting in poor fit.

Therefore, in the present embodiment, the shape bent so as to protrude toward the skin side is devised so as to be stably maintained. Hereinafter, this device will be described.

FIG. 7A is a schematic diagram of a cut surface obtained by cutting the absorbent core 11 along the width direction, and is a schematic diagram showing an enlarged portion corresponding to the broken line LB in the cut surface. FIG. 7B is an electron micrograph of part B of FIG. 7A. Note that the schematic diagram of FIG. 7A and the photograph of the electron microscope of FIG. 7B are a slightly bent state by slightly narrowing the dimension in the width direction from the normal state in order to make the device easier to see. .

First, the absorbent core 11 is bent so as to protrude to the skin side in the thickness direction along the broken line LB extending in a straight line in the longitudinal direction as described above. Here, the broken line LB in the width direction is bent. A low density portion 11DL in which the distribution density (g / cm ³ ) of liquid absorbent fibers (hereinafter also referred to as fiber density (g / cm ³ )) is lower than the surrounding portion is formed inside the core 11 at the position. Has been. Further, the core 11 is positioned on the skin side of the low density portion 11DL, while being positioned on the skin side layer 11s having a fiber density higher than that of the low density portion 11DL and on the non-skin side of the low density portion 11DL, A non-skin side layer 11 ns having a higher fiber density than the low density portion 11DL.
And the said skin side layer 11s is bent so that the part 11sLB corresponding to the broken line LB may protrude to the skin side. Therefore, based on the bent shape of the skin side layer 11s, it is possible to attach a fold that protrudes toward the skin side with respect to the napkin 1 (FIG. 6B). Is easily maintained in a shape protruding to the skin side.

Also, the low density portion 11DL is located on the non-skin side of the skin side layer 11s. Therefore, even when an external force that faces inward in the width direction, such as a crotch tightening force, acts on the napkin 1 while the napkin 1 is worn, the skin side layer 11s is bent so as to protrude toward the skin side. While maintaining the above, it is possible to bend more quickly. That is, when the skin side layer 11s is further bent, as shown in FIG. 7A, the inner peripheral side portion 11sp of the skin side layer 11s can quickly move toward the low density portion 11DL. Thus, the situation where the inner peripheral portion 11sp loses its place and exhibits a large resistance when it is further bent is avoided. Therefore, the shape of the napkin 1 can be stably maintained in a bent shape that protrudes toward the skin along the broken line LB.

On the other hand, as shown in FIG. 7B, the low-density portion 11DL has liquid absorbent fibers although there are fewer than the surrounding portions. Therefore, the excretory fluid absorbed by the skin side layer 11s can be quickly drawn toward the non-skin side layer 11ns. As a result, the absorbed excretory fluid can be quickly diffused in the thickness direction, and as a result, the napkin 1 can exhibit good absorbability.

Incidentally, from the viewpoint of surely exhibiting the above-described effect of stably maintaining the bent shape, desirably, the dimension in the thickness direction of the skin side layer 11s at the position corresponding to the broken line LB is in the range of 0.3 mm to 3 mm. In addition, the maximum value of the dimension in the thickness direction and the maximum value of the dimension in the width direction of the low density portion 11DL are in the range of 0.3 mm to 3.5 mm and 0.5 mm to 5 mm, respectively. It is good to be.

Incidentally, the fiber density of the low density portion 11DL (g / cm ³⁾ is the confirmation that lower than the fiber density of the portion of the periphery (g / cm ^3), for example, the absorbent core 11 as shown in FIG. 7A It can be easily performed by visualizing the liquid absorbent fiber by cutting along the width direction and dyeing the cut surface with ink. That is, if the fibers and the inter-fiber gaps are clearly seen as shown in FIG. 7B by the above dyeing process, it is visually observed that the fiber density of the low density portion 11DL is lower than the fiber density of the surrounding portion. Can be easily confirmed.
Incidentally, if such visual confirmation is difficult, the following may be performed. First, the total sum of the lengths is obtained by, for example, counting the number of liquid absorbent fibers located in a region A11DL assumed to be a low density portion 11DL (hereinafter also referred to as a low density portion assumed region A11DL). Similarly, the total sum of the lengths is obtained by, for example, counting the number of liquid absorbent fibers located in the peripheral portion of the low density portion assumed region A11DL. Then, each sum of the obtained lengths is multiplied by the specific gravity of the liquid absorbent fiber and the cross-sectional area of the fiber to obtain a multiplication value, and each multiplication value is divided by the volume of each corresponding region. by obtaining respectively a quotient and can be obtained with the fiber density of the low density portion assumed area A11DL (g / cm ^3), and a fiber density of the portion of the periphery (g / cm ^3). As a result, it is possible to confirm whether or not the low density portion assumed region A11DL is actually the low density portion 11DL.

On the other hand, as can be seen from FIG. 7A, in this example, the non-skin side layer 11ns is bent into an M shape. That is, in the non-skin side layer 11 ns, the portions 11 nsp. While 11 nsp protrudes toward the skin side, the non-skin side layer 11 ns is bent so that the portion 11 nsp located between these portions 11 nsp and 11 nsp protrudes toward the non-skin side. Therefore, even when an external force directed inward in the width direction such as a crotch tightening force or the like acts on the napkin 1 while the napkin 1 is worn, the non-skin side layer 11ns has the M shape. Can be quickly reduced and deformed in the width direction. Therefore, it is reliably prevented that the non-skin side layer 11ns inhibits the state of the skin side layer 11s bent so as to protrude toward the skin side. As a result, the skin side layer 11s stabilizes the above-described bent shape. Can be maintained. However, it is not limited to this. That is, the non-skin side layer 11ns may not be bent into an M shape.

In this example, when the dimension in the thickness direction at the position corresponding to the polygonal line LB in the width direction is compared between the skin side layer 11s and the non-skin side layer 11ns, the dimension L11s of the skin side layer 11s is It is larger than the dimension L11ns of the non-skin side layer 11ns. And in the skin side layer 11s, the capacity | capacitance of excretion liquid is large based on this dimension L11s of the thickness direction being large. Therefore, the skin side layer 11s absorbs the excretion fluid such as menstrual blood excreted from the excretion opening 201He such as the vaginal opening immediately and promptly with its large absorbable capacity, and this is absorbed into the non-skin side layer 11ns. It can diffuse to surrounding parts. And as a result, this napkin 1 can show high immediate absorbency, and can thereby prevent the leakage of excretory fluid from the napkin 1 effectively. However, it is not limited to this. That is, in the dimension in the thickness direction, the dimension L11ns of the non-skin side layer 11ns may be larger than the dimension L11s of the skin side layer 11s.

Furthermore, in this example, the skin-side sheet 12 of FIG. 4 fixed to the skin side surface of the absorbent core 11 is integrated with the absorbent core 11 by the above-described adhesive HMA or the like. And is bent along the broken line LB. Therefore, the sheet 12 can make up for the rigidity of the core 11 so that the shape of the core 11 does not collapse while keeping the folded state of the absorbent core 11 from being hindered. As a result, unnecessary deformation such as kinking of the absorbent core 11 can be effectively prevented. However, it is not limited to this. That is, the skin side sheet 12 may not be integrated with the absorbent core 11.

Moreover, since the skin side sheet | seat 12 is an air through nonwoven fabric as stated above, it has a thermoplastic resin fiber as the constituent fiber. On the other hand, the absorbent core 11 also has thermoplastic resin fibers. And since these thermoplastic resin fibers are materials similar to each other, they are heat-sealed by being squeezed as in the above-described pressing parts EL, ED, ED10, etc., thereby being firmly joined. As a result, the skin side sheet 12 is firmly bonded to the absorbent core 11. Therefore, the skin-side sheet 12 can effectively exhibit a stiffening action that supplements the rigidity of the absorbent core 11 described above. However, it is not limited to this. That is, the skin side sheet 12 may not have the thermoplastic resin fiber, and the absorbent core 11 may not have the thermoplastic resin fiber.

Furthermore, in this example, as shown in FIG. 4, the non-skin side sheet 13 and the back sheet 30 are provided on the non-skin side of the absorbent core 11. The adhesive HMA is integrally bonded and fixed to the non-skin side layer 11ns (FIG. 7A) of the core 11 so that these

sheets

13 and 30 are also bent into an M shape integrally with the non-skin side layer 11ns. Yes. Therefore, when an external force directed inward in the width direction, such as a crotch tightening force, acts on the napkin 1, these

sheets

13 and 30 can also be rapidly reduced and deformed in the width direction together with the non-skin side layer 11ns. In this way, it is possible to prevent the skin side layer 11s from being bent so as to protrude toward the skin side. However, it is not limited to this. That is, the non-skin side sheet 13 and the back sheet 30 may not be integrated with the non-skin side layer 11 ns of the absorbent core 11.
Incidentally, the M-shape of the back sheet 30 can be easily confirmed if the napkin 1 is viewed from the non-skin side. That is, as shown in FIG. 3, valley fold lines are provided at positions on the backsheet 30 corresponding to the portions 11 nsp and 11 nsp that protrude to the skin side in the non-skin side layer 11 ns described above with reference to FIG. While Lv and Lv are formed along the longitudinal direction, a mountain fold line Lm is formed along the longitudinal direction at a position on the backsheet 30 corresponding to the portion 11 npm protruding to the non-skin side. Therefore, when these valley fold lines Lv, Lv and mountain fold line Lm are seen, it can be easily confirmed that the back sheet 30 is bent into an M shape.

In addition, as described above with reference to FIG. 2, in this example, the point-like pressing parts ED, ED, etc. that squeeze the top sheet 20 and the absorbent body 10 together from the skin side and integrate them together are staggered. Although it is formed in a pattern, it is preferable that the compressed parts ED, ED... Are not formed in the broken line LB portion in the absorbent core 11 as in the example of FIG. .
And if it becomes like this, it can prevent that the bending rigidity of the part of said broken line LB will be raised by pressing part ED, ED ... origin. Therefore, it is not inhibited that the shape of the absorbent core 11 becomes a bent shape that protrudes to the skin side along the broken line LB, and as a result, the bent shape can be stabilized.

However, it is not limited to this. That is, if the pressing part ED is not formed in at least one part of the broken line LB part in the absorptive core 11, the above-mentioned inhibition prevention effect can be enjoyed correspondingly. Therefore, what is necessary is just to exist in the part of the broken line LB in the absorptive core 11 in which the pressing part ED is not formed.

Further, from the viewpoint of preventing the above-described inhibition, desirably, the sheet located on the skin side in the thickness direction from the absorbent core 11, for example, in the example of FIG. 4, the skin side sheet 12 or the top sheet 20 has a width. It is good to have high extensibility in the direction. And if it becomes like this, these sheet | seats 12 and 20 will not inhibit that the absorptive core 11 bends so that it may protrude to the skin side along the broken line LB, and, thereby, the shape of the napkin 1 Can be stably maintained in a bent shape that protrudes toward the skin side. In addition, as a sheet | seat which has the high extensibility in the width direction, extending | stretching processes, such as what is called a gear extending | stretching process, were given, the sheet | seat which developed the stretching property of the width direction, or one slit along a longitudinal direction is provided. Examples thereof include a formed sheet or a sheet in which a plurality of slits are formed side by side in the width direction. In addition, examples of the material of the former sheet (a sheet that exhibits stretchability by stretching treatment) include an elastomer that exhibits substantially elasticity such as a polyurethane-based elastomer and a thermoplastic resin that exhibits approximately inelasticity such as a polyolefin-based resin. Sheet, etc.
In addition, when the absorptive core 11 bends so that it may protrude to the skin side, the non-skin side sheet | seat 13 is not substantially extended in the width direction. For this reason, the non-skin side sheet | seat 13 can use the sheet | seat whose extensibility is lower than the skin side sheet | seat 12. FIG. For example, in this example, an air-through nonwoven fabric is used for the skin-side sheet 12 and an SMS nonwoven fabric is used for the non-skin-side sheet 13. This is because the air-through nonwoven fabric is higher in the width direction than the SMS nonwoven fabric. It is because it has extensibility. Then, the same idea may be extended to the top sheet 10 and the back sheet 30. That is, in summary, the extensibility of the non-skin side sheet 13 or the back sheet 30 may be lower than the extensibility of the skin side sheet 12 or the top sheet 10. Incidentally, the stretchability mentioned here refers to the property of “extending without breaking when pulled so as to extend by 5% of the natural length in a predetermined direction”, and preferably pulling so as to extend by the above 5%. The load at a width of 25 mm is preferably 10 N / 25 mm or less.

By the way, the most important contrivance among the contrivances, that is, the contrivance of forming the low density portion 11DL inside the absorbent core 11, and the skin side layer 11s of the core 11 projecting to the skin side. Formation of the broken line LB to which the device of bending shape is applied can be realized as follows, for example.

First, the absorbent body 10 on which the compressed portion ED10 is formed is folded in half in the width direction while the skin side surface is on the outer peripheral side, and the portions facing each other are overlapped in the thickness direction, and this half-folded state By passing the absorbent body 10 between a pair of upper and lower press rolls, the absorbent body 10 in a folded state is pressed with these press rolls in the thickness direction. Then, after the pressing, if the bi-folded absorbent body 10 is opened in the width direction to release the bi-folded state, a fold line LB along the longitudinal direction is formed at the center position in the width direction, and the absorbent In the portion of the core 11 between the skin side layer 11s and the non-skin side layer 11ns, delamination or the like occurs, whereby a low density portion 11DL is formed in the portion, and the skin side layer 11s has a skin side. The protruding shape remains on the surface. As a result, the broken line LB to which the above-described two ideas are applied is formed in the absorbent body 10.

Incidentally, in the manufacturing process of the absorbent body 10, the absorbent body 10 is basically in the state of a continuous body that is continuous in the longitudinal direction. Therefore, the above-described breath treatment is also performed on the continuous body of the absorbent body 10. . Therefore, the said press process can be performed continuously and as a result, the absorber 10 can be manufactured with high productivity.

Here, from the viewpoint of reliably performing “formation of the low density portion 11DL” which is one of the devices, the average value of the fiber density of the absorbent core 11 is desirably 0.092 (g / cm ³ ) or more. Good. Here, the numerical range of 0.092 (g / cm ³ ) or more is obtained by experiment, and this experiment will be described below.

First, about the absorptive core 11 used as a test piece, the thing of the composition shown in Table 1 of FIG. 8 was prepared. That is, 200 (g / m ² ) pulp fiber, 30 (g / m ² ) PE (sheath) / PET (core) sheath-core composite fiber, and 20 (g / m ² ) SAP Were mixed, and the absorbent core 11 made of only pulp fibers was also prepared at two levels of 200 (g / m ² ) and 400 (g / m ² ). In addition, about fiber density (g / cm < ³ >), a plurality of pressing parts are discretely formed in each of the absorbent cores 11, and the thickness is adjusted to each value in Table 1. , Changed at multiple levels. Each test piece obtained in this way was folded in half and overlapped, and then opened to 90 °, and the presence or absence of the low density portion 11DL of the absorbent core 11 was visually determined.
In addition, about calculation of the fiber density (g / cm < ³ >) in case a test piece has a pulp fiber and a composite fiber, the total value of each basic weight (g / m < ² >) of a pulp fiber and a composite fiber is used for a test piece. On the other hand, for the calculation of the fiber density (g / cm ³ ) when the test piece has only pulp fibers, the basis weight (g / m ² ) of the pulp fibers is used for the test piece. It was performed by dividing by the thickness (mm).

Table 1 shows the visual determination result of the presence or absence of the low density portion 11DL in association with the fiber density (g / cm ³ ). From this, it can be seen that if the fiber density is 0.092 (g / cm ³ ) or more, the low density portion 11DL is formed. Therefore, it is desirable that the fiber density of the absorbent core 11 is 0.092 (g / cm ³ ) or more from the viewpoint of reliably forming the low density portion 11DL.

Incidentally, the average value of the fiber density of the core 11 is preferably 0.6 (g / cm ³ ) or less, and more preferably 0.5 (g / cm ³ ) or less. And if it does in this way, the problem which may occur when it is made larger than 0.6 (g / cm < ³ >), ie, the deterioration of the wearing feeling of the napkin 1 resulting from the core 11 becoming excessively hard. Can be effectively prevented.

By the way, when such an absorbent body 10 is easily maintained in a shape that is sharply bent at the polygonal line LB, a portion that protrudes to the skin side based on the sharp bent shape is on the labia where the excretory opening 201He such as the vaginal opening exists. This is preferable because it easily enters between the abutments or the labia.
Therefore, the inventor of the present application is examining conditions for making it easier to maintain a sharply bent shape protruding toward the skin side along the broken line LB. This will be described below.

First, from the results, in order to easily maintain a shape that protrudes toward the skin side and is bent sharply, the bending rigidity value of the absorbent body 10 is set to the Gurley method stiffness specified in Japanese Industrial Standard JIS L1085. When measured by the softness, the portion corresponding to the broken line LB protrudes to the non-skin side than the bending resistance when the absorber 10 is folded in a mountain fold so that the portion corresponding to the broken line LB protrudes to the skin side. Thus, the bending resistance when the absorber 10 is folded into a valley fold is preferably 0.50 mN or more. Here, the numerical range of 0.50 mN or more is obtained by an experiment, and this experiment will be described below.

First, a plurality of samples made of pulp fibers simulating the absorbent body 10 were generated at a plurality of basis weight levels as shown in Table 2 of FIG. Then, the thickness of all the samples is kept within a range of 1.3 to 1.75 mm by discretely forming a plurality of dot-like compressed portions on each sample, and thus the thickness of each sample is approximately Aligned to the same value. Moreover, the sample of each basic weight level was bent in the center position of the width direction, and the broken line LB was formed in the longitudinal direction in the same position. And it produced | generated by cutting out the test piece into the rectangular shape of length 38mm x width 25mm from the sample in which the broken line LB was formed.

FIG. 10A shows a schematic plan view of the test piece, and FIG. 10B shows a BB arrow view in FIG. 10A. As can be seen from FIGS. 10A and 10B, when the test piece is cut out, the vertical direction, which is the length direction of 38 mm, is set along the width direction of the sample, while the length direction is 25 mm. The transverse direction was along the longitudinal direction of the sample. Note that the width direction of the sample is aligned with the width direction of the napkin 1, and the longitudinal direction of the sample is aligned with the longitudinal direction of the napkin 1.
Moreover, the test piece was cut out so that the above-mentioned broken line LB was located along the horizontal direction at a position 11 mm from the upper end in the vertical direction. Further, for the purpose of preventing the test piece from collapsing, an acrylic adhesive tape having a thickness of 48 μm was attached to the skin side surface and the non-skin side surface of the upper end portion in the longitudinal direction of the test piece. However, for the purpose of preventing the adhesive tape from affecting the measurement accuracy of the bending resistance, the adhesive tape is affixed to the test piece so that it does not protrude below the chuck of the Gurley type flexibility tester described later. I attached.

In addition, the measurement of each bending resistance of the mountain fold and the valley fold of the test piece is performed using a Gurley type flexibility tester (manufactured by Yasuda Seiki Seisakusyo Co., Ltd.) capable of executing the JIS L1085 Gurley method. In accordance with JIS L1085. During measurement, the upper end of the test piece in the vertical direction is fixed to the chuck of the movable arm of the tester with a length of 6.3 mm in the vertical direction, while the lower end of the test piece is 6.3 mm in the vertical direction. Now, it was brought into contact with the upper end of the pendulum of the testing machine. Then, the movable arm is moved so that the test piece bends in the thickness direction, and the scale of the pendulum position at the time when the lower end of the test piece is separated from the upper end of the pendulum is read. The softness was determined. The measurement of the bending resistance was performed five times for each level, and the average value of the five times was defined as the bending resistance of each level.

Moreover, evaluation of whether each sample of a basis weight level is easy to maintain in the mountain fold shape which protruded to the skin side and was bent sharply was performed as follows.
First, from the samples of each basis weight level on which the broken line LB is formed, 5 or 10 pieces are cut into a rectangular shape of 65 mm in the width direction and 30 mm in the longitudinal direction, respectively, and the maintenance stability of the bent shape is obtained. Test specimens for evaluation were generated. In addition, when cutting out, it was made for the said broken line LB to be located in the center position of said 65 mm length.

Then, as shown in FIG. 11A, each test piece was bent along the above-mentioned broken line LB to form a mountain fold shape protruding toward the skin side. Moreover, at this time, it adjusted so that the space | interval between a pair of slope concerning a mountain fold shape might be set to 40 mm in the lower end. And each said lower end was fixed on the above-mentioned horizontal table surface, maintaining the space | interval between each lower end of said pair of slopes at said 40 mm.

Then, as shown in FIG. 11B, the mountain fold shape of the test piece is rounded by the weight of the test piece, and 10 judges determine the degree of this roundness visually. A determination was made as to whether the mountain fold shape was sharp or not, and a final decision was made based on the majority of the determination results.

The experimental results are shown in Table 2 of FIG. 9, which shows that if the subtracted value of the bending strength of the mountain fold from the bending strength of the valley fold is 0.50 mN or more, the mountain fold is sharp. It can be seen that the bent shape is easily maintained. Therefore, in order to make it easy to maintain the absorbent body 10 in the sharp bent shape, from this, on the non-skin side rather than the bending resistance when the absorbent body 10 is mountain-folded so as to protrude toward the skin side. It has been found that the bending resistance when the absorber 10 is valley-folded so as to protrude may be larger by 0.50 mN or more.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

In the above-described embodiment, the sanitary napkin 1 is exemplified as the absorbent article, but the present invention is not limited thereto. For example, the absorbent article may be a panty liner.

In the above-described embodiment, the sanitary napkin 1 as an example of the absorbent article has the pair of

wing portions

1w and 1w, but is not limited thereto. That is, the wing portion 1w may not be provided.

In the above-described embodiment, the broken line LB is formed at the center position in the width direction of the absorbent core 11, but the present invention is not limited to this. That is, the broken line LB may be formed at a position slightly shifted from the center position in the width direction. However, since the absorptive core 11 and the napkin 1 are basically designed symmetrically with respect to the center position in the width direction, the polygonal line LB is preferably formed at the center position.

In the above-described embodiment, the absorbent core 11 is covered with the two sheets of the skin-side sheet 12 and the non-skin-side sheet 13, but the present invention is not limited to this. For example, the skin side and non-skin side of the absorbent core 11 may be covered so as to be wrapped with a single sheet.

In the above-described embodiment, the above-described broken line LB is formed over the entire length in the longitudinal direction of the absorber 10, but is not limited thereto. That is, if the broken line LB is guided so that the absorbent body 10 protrudes toward the skin and bends, the broken line LB may be formed in a part of the longitudinal direction of the absorbent body 10. For example, the broken line LB may be provided only in the excretion opening facing region where the excretion opening 201He such as the vaginal opening faces in the absorbent body 10.

1 sanitary napkin (absorbent article), 1w wing part, 10 absorbent body, 11 absorbent core, 11DL low density part, 11s skin side layer, 11sLB part corresponding to broken line, 11sp inner circumference part, 11ns non-skin Side layer, 11 nsp part, 11 nspm part, 12 skin side sheet, 13 non-skin side sheet, 20 top sheet, 20 e outer periphery, 20 w part, 30 back sheet, 30 c part, 30 w part, 40 c adhesive part, 40 w adhesive part, 201 wearer, 201K crotch, 201He excretion opening, LB broken line, AEL area, A11DL, low density partial assumed area, E pressing part, EL linear pressing part, ED dotted pressing part, ED10 pressing part, LKs cutout line , Lkns notch line, HMA adhesive, Lv valley fold line, L Mountain fold line,

Claims

An absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other,
Having an absorbent body with an absorbent core with liquid absorbent fibers;
A fold line is provided along the longitudinal direction for guiding the absorber to protrude and bend toward the skin side in the thickness direction,
The absorbent core is formed at the position of the broken line in the width direction, and the distribution density of the liquid absorbent fibers is lower than the surrounding portion, and the thickness direction is lower than the low density portion. A skin side layer located on the skin side, and a non-skin side layer located on the non-skin side in the thickness direction than the low density portion,
In the low density portion, the liquid absorbent fiber exists,
The absorbent article, wherein the skin side layer is bent so that a portion corresponding to the broken line protrudes to the skin side in the thickness direction.
The absorbent article according to claim 1,
In the non-skin side layer, each part located on both sides of the polygonal line protrudes to the skin side in the thickness direction, and a part located between the parts projects to the non-skin side in the thickness direction. Absorbent article, wherein the non-skin side layer is bent in shape.
The absorbent article according to claim 1 or 2,
The absorbent article having an average fiber density of the liquid absorbent fibers of the absorbent core of 0.092 (g / cm 3 ) or more.
The absorbent article according to any one of claims 1 to 3,
When the dimension in the thickness direction at the position corresponding to the broken line in the width direction is compared between the skin side layer and the non-skin side layer, the dimension of the skin side layer is the non-skin side layer. An absorbent article characterized in that it is larger than the dimension.
The absorbent article according to any one of claims 1 to 4,
The absorber has a skin side sheet fixed to the skin side of the absorbent core,
The said skin side sheet | seat is integrated with the said absorptive core, and is bent along the said broken line, The absorbent article characterized by the above-mentioned.
The absorbent article according to claim 5,
The skin-side sheet is a nonwoven fabric having thermoplastic resin fibers,
The absorbent core has a thermoplastic resin fiber and a cellulosic water absorbent fiber as the liquid absorbent fiber,
An absorbent article, wherein the thermoplastic resin fibers of the skin-side sheet and the thermoplastic resin fibers of the absorbent core are joined.
The absorbent article according to any one of claims 1 to 6,
When the bending resistance is measured by the Gurley method defined in JIS L1085,
The portion corresponding to the broken line protrudes to the non-skin side in the thickness direction, rather than the bending resistance when the absorber is bent so that the portion corresponding to the broken line protrudes to the skin side in the thickness direction. Thus, the absorbent article in which the bending resistance when the absorbent body is bent is 0.50 mN or more.
The absorbent article according to any one of claims 1 to 7,
On the skin side in the thickness direction from the absorbent core, a sheet that has been stretched to develop the stretchability in the width direction, or a sheet in which slits along the longitudinal direction are formed is disposed. An absorbent article characterized by the above.
The absorbent article according to any one of claims 1 to 8,
The absorbent body and the top sheet disposed on the skin side in the thickness direction from the absorbent body are joined and integrated by a plurality of squeezed portions formed by squeezing from the skin side in the thickness direction of the top sheet. Has been
The absorbent article, wherein a portion where the compressed portion is not formed is present in the portion of the broken line in the absorbent core of the absorbent body.
The absorbent article according to claim 9,
An absorbent article, wherein none of the pressing parts is formed in the broken line portion of the absorbent core of the absorbent body.
The absorbent article according to any one of claims 1 to 10,
The said broken line is extended over the full length of the said longitudinal direction of the said absorptive core, The absorbent article characterized by the above-mentioned.
The absorbent article according to claim 2,
A sheet is provided on the non-skin side of the non-skin side layer in the thickness direction, and the sheet is bent into the M shape integrally with the non-skin side layer,
When the absorbent article is viewed from the non-skin side in the thickness direction, the sheet has a valley fold line at a position corresponding to each of the non-skin-side layers protruding to the skin side. An absorbent article, characterized in that a mountain fold line is formed along the longitudinal direction at a position corresponding to the portion protruding toward the non-skin side while being formed along the direction.