RU2774347C1 - Absorbent article and method for manufacturing the absorbent article - Google Patents

Abstract

FIELD: hygiene.

SUBSTANCE: proposed is an absorbent article (1) with an absorbent body (2), a sheet (3) located on the skin-facing side, and an intermediate sheet (4) located between the absorbent body (2) and the sheet (3) located on the skin-facing side, wherein the sheet (3) located on the skin-facing side has a first surface area (31) with a first surface shape and a second surface area (32) with the second surface shape, wherein the first surface area (31) has a placement area (33) overlapping the with intermediate sheet (4) on the skin-facing side, and a no-placement area (34) not overlapping with the intermediate sheet (4), and in a state wherein the absorbent article (1) is laid and stretched, at least part of the placement area (33) is located in the back relative to the centre of the absorbent article (1) longitudinally, and at least part of the no-placement area (34) is located in the back, longitudinally, relative to the placement area (33).

EFFECT: creation of a functional absorbent article.

26 cl, 21 dwg

Description

The technical field to which the invention belongs

[0001]

The present invention relates to an absorbent article and to a method for manufacturing an absorbent article.

Prior Art

[0002]

Patent Document 1 discloses a disposable diaper in which an intermediate sheet is provided between the top sheet and the absorbent body to prevent backflow of urine absorbed by the absorbent body. Furthermore, if the front end of the top sheet is taken to be 0% and the back end of the top sheet to be 100% in Patent Document 1, it is preferable that the front end of the intermediate sheet is positioned between 0% and 11% and the rear end of the intermediate sheet is positioned at range from 92% to 100%. The intermediate sheet extends over a large extent and extends from the front through the back of the diaper.

[0003]

Patent Document 2 discloses the following method for manufacturing an absorbent article sheet that forms a top surface: the circumferential surface of the first roller is shaped with protrusions and recesses; the circumferential peripheral surface of the second roller is shaped with projections and recesses such that the second roller engages with the first roller with projections and recesses; the sheet to form the top layer is placed between the first roller and the second roller to form protrusions and recesses, and the sheet to form the lower layer is applied to the sheet to form the upper layer on which the protrusions and recesses have been formed, and attached to this sheet.

[Patent Documents]

[0004]

[Patent Document 1] Japanese Patent Application Publication No. 2013-172813

[Patent Document 2] Japanese Patent Application Publication No. 2004-174234

The essence of the invention

[Technical problem]

[0005]

The problem to be solved by the present invention is at least one of the following first problem and second problem. The first problem is that in disposable diapers there is excretion not only in the form of urine, but also in the form of feces. Soft feces containing a large amount of moisture create a problem in that soft feces are likely to flow out from the back and stick to the skin. When the intermediate sheet is located up to the back of the diaper, as in the diaper of Patent Document 1, the moisture contained in the soft feces quickly moves into the intermediate sheet, which makes it possible to suppress the flow of soft feces. However, soft faeces, from which only moisture is initially absorbed, become more viscous, making it difficult to take them into the inside of the top sheet. As a result, there is a possibility that soft feces will remain on the surface of the top sheet (sheet facing the skin side), and there is a possibility that soft feces will stick to the wearer's skin.

[0006]

Therefore, it is an object of the present invention to reduce the amount of soft feces that remain on the skin side sheet while suppressing leakage of soft feces from the back side.

[0007]

The second problem is that in the case of forming protrusions and recesses by passing a sheet (skin side sheet) between two rollers whose circumferential peripheral surfaces are formed with protrusions and recesses, the sheet is stretched in a plurality of directions, which causes a difference in fiber sparsity. sheet. Therefore, in the portion of the sheet in which the protrusions and recesses are formed, the pulling force to move the sheet will be applied unevenly, which increases the likelihood of the sheet being loosened. When another sheet (intermediate sheet) is attached in this state, there is a risk of wrinkling in the connected part of the sheet.

[0008]

Therefore, it is an object of the present invention to reduce the possibility of wrinkling in an absorbent article, the intermediate sheet of which is attached to the skin-side sheet, and having protrusions and recesses, which are formed by passing the skin-side sheet between two rollers having protrusions on the their outer circumferential surfaces.

[Solution]

[0009]

The main aspect of the present invention, aimed at solving the first problem, is an absorbent article having a longitudinal direction and a lateral direction,

wherein the absorbent article includes:

absorbent body;

a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and

an intermediate sheet disposed between the absorbent body and the skin side sheet,

moreover, the skin-facing side sheet has a first surface zone and a second surface zone, where

- the first surface zone has a first surface shape and,

- the second surface zone has a second surface shape different from the first surface shape,

the first surface zone has an accommodation zone and an unaccommodated zone, where

the accommodating area is the area that overlaps the intermediate sheet on the skin side, and

- the zone without placement is the zone that does not overlap the intermediate sheet, and

in a state in which the absorbent article is expanded and stretched,

- at least part of the accommodation zone is located on the back side with respect to the center of the absorbent article in the longitudinal direction, and

- at least part of the zone without accommodation is located on the rear side in the longitudinal direction with respect to the accommodation zone.

[0010]

The main aspect of the present invention, aimed at solving the second problem, is a method for manufacturing an absorbent article,

wherein the absorbent article has

absorbent body;

a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and

an intermediate sheet disposed between the absorbent body and the skin side sheet,

wherein the method includes:

the step of passing the skin side sheet between two rollers, wherein

- the first zone of the skin-facing side of the sheet is shaped with protrusions and recesses, and

- the second zone of the skin side of the sheet is not shaped with protrusions and depressions,

the two rollers have a protrusion provided on the outer circumferential surface of at least any one of the two rollers, and

- the second zone is the zone adjacent to the first zone in the direction of movement of the sheet facing the skin side; and

the step of joining the intermediate sheet and the skin side sheet, wherein

- the intermediate sheet has a surface that is located on the side facing the skin, and which is flat in contrast to the shape of the first zone with projections and depressions,

- performing a connection in which one part of the intermediate sheet is attached to the second zone of the sheet facing the skin side, and

then, a join is made in which the other part of the intermediate sheet is attached to the first area of the sheet facing the skin side.

Other features of the present invention will be further explained through the description in the present description and the accompanying drawings.

[Preferable Effect of the Invention]

[0011]

The effect of the present invention in solving the first problem is that it is possible to reduce the amount of soft feces that remain on the skin side sheet while suppressing leakage of soft feces from the rear side.

[0012]

The effect of the present invention in solving the second problem is to reduce the possibility of wrinkling in an absorbent article, the intermediate sheet of which is attached to the skin-side sheet, and having protrusions and recesses, which are formed by passing the skin-side sheet, between two rollers having protruding parts on their outer circumferential surfaces.

Brief description of the drawings

[0013]

1 is a plan view of the diaper 1 in the unfolded and stretched state.

Fig. 2 is a sectional view taken along the line A-A shown in Fig. 1.

FIG. 3A is a sectional view of the second surface area 32 of the skin-facing side of the sheet 3, FIG. 3B is a sectional view of the first surface area 31 of the skin-facing side of the sheet 3, and FIG. a schematic representation illustrating how the sheet 3 located on the side facing the skin is processed.

4 is a view showing the arrangement of the first surface area 31 and the intermediate sheet 4.

Fig. 5 is a view showing the arrangement of the first surface area 31 and the leakage-proof wall portion 11 .

6A and 6B are explanatory diagrams illustrating how urine is absorbed.

7A-7C are explanatory diagrams illustrating how soft feces are absorbed.

8A-8C are explanatory diagrams illustrating how soft feces are absorbed.

9 is a plan view of the diaper 100 in the unfolded and stretched state.

Fig. 10 is a sectional view taken along the line A-A shown in Fig. 9.

Fig. 11 is a view schematically showing a part of a device 200 for manufacturing a diaper 100.

Fig.12 is an enlarged view of parts 211 and 221, designed to form projections and recesses.

Fig. 13A is a sectional view of the intermediate sheet 104, Fig. 13B is a sectional view of the first zone 1031 of the sheet 103 located on the skin side, and side facing the skin.

14 is a schematic view illustrating a state in which the intermediate sheets 104 are attached to the skin side sheets 103 (continuous member).

15A-15C are explanatory diagrams illustrating the step of folding the diaper 100.

16 is a schematic plan view of a diaper 100 manufactured by the diaper 100 manufacturing apparatus 200.

Fig.17 is a view showing the arrangement of the first area 1031 of the sheet 103 located on the side facing the skin, and part 1011, forming a leak-proof wall.

18 is a schematic plan view of the diaper 100 in a modified example.

19A and 19B are explanatory diagrams illustrating how urine is absorbed.

20A-20C are explanatory diagrams illustrating how soft feces are absorbed.

21A-21C are explanatory diagrams illustrating how soft feces are absorbed.

Description of Embodiments

[0014]

The descriptions in the present description and the accompanying drawings make it possible to clarify at least the following objects. An absorbent article having a longitudinal direction and a lateral direction,

wherein the absorbent article includes:

absorbent body;

a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and

an intermediate sheet disposed between the absorbent body and the skin side sheet,

wherein the skin side sheet has a first surface area and a second surface area,

- the first surface zone has the first surface shape,

- the second surface zone has a second surface shape different from the first surface shape,

the first surface zone has a placement area and a non-placement area,

the accommodating area is the area that overlaps the intermediate sheet on the side facing the skin,

- the zone without placement is the zone that does not overlap the intermediate sheet,

in a state in which the absorbent article is expanded and stretched,

- at least part of the accommodation zone is located on the rear side with respect to the center of the absorbent article in the longitudinal direction,

- at least part of the zone without accommodation is located on the rear side in the longitudinal direction with respect to the accommodation zone.

[0015]

In the above-described absorbent article, moisture from the soft feces located in the accommodating area can be transferred to the intermediate sheet, which can suppress the flow of soft feces. Therefore, leakage of soft feces from the back side can be suppressed. In addition, all soft feces that have flown into the non-accommodating area located on the rear side behind the accommodating area are more likely to be taken into the inside of the skin side sheet, which can reduce the amount of soft feces that remain on the sheet located with side facing the skin.

[0016]

In such an absorbent article

the first surface region has a greater difference in fiber sparsity in the in-plane direction of the skin side of the sheet than the second surface region.

[0017]

In the absorbent article described above, it is easy to ensure that all soft feces are received in the inner part of the skin-side sheet from that part of the first surface zone in which the fibers are sparse, thereby reducing the amount of soft feces that remain on the skin-side sheet. .

[0018]

In such an absorbent article

in the first surface zone

a space is provided between the skin-side sheet and the material adjacent to the skin-side sheet on the non-skin side.

[0019]

In the absorbent article described above, it is easy to receive more soft feces into the space under the skin side sheet (skin side sheet), which can reduce the amount of soft feces that remain on the skin side sheet.

[0020]

In such an absorbent article

in the first surface zone

the skin side sheet is shaped with protrusions and indentations, and

- the part forming the side wall of the protrusions and recesses has a low fiber density compared to the part forming the top of the protrusions and recesses.

[0021]

In the absorbent article described above, it is easy to ensure that all soft feces are received into the inside of the skin-facing sheet from the sidewall forming part (the fiber-sparse part), thereby reducing the amount of soft feces that remains on the skin-facing sheet. to the skin of the side.

[0022]

In such an absorbent article

the second surface zone has a second accommodating zone that overlaps the intermediate sheet on the skin-facing side, and

in a state in which the absorbent article is expanded and stretched,

- at least a part of the second accommodation zone is located on the front side in the longitudinal direction with respect to the accommodation zone.

[0023]

In the above-described absorbent article, the difference in fiber sparsity is small in the second surface region, which makes it easier for urine to move to the intermediate sheet throughout the second accommodation region, and can suppress leakage of urine.

[0024]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the length of the second placement zone in the longitudinal direction is greater than the sum of the length of the placement zone in the longitudinal direction, and the length of the zone without placement in the longitudinal direction.

[0025]

In the above-described absorbent article, the second accommodation area suitable for receiving urine when urinating can be arranged over a long length in the longitudinal direction, which can suppress leakage of urine.

[0026]

In the case of such an absorbent article

the absorbent article is an absorbent article secured with tapes and having two bonding tapes that extend from the rear waist area towards two sides, outer in the lateral direction, and

in a state in which the absorbent article is expanded and stretched,

- the first surface zone is located on the front side in the longitudinal direction with respect to the centers of the fastening tapes in the longitudinal direction.

[0027]

In the above-described absorbent article, the first surface area having the part in which the fibers are densely arranged (the high rigidity part) is not brought into close contact with the body of the wearer by means of the fastening tapes in a tight fit, thus improving the wearing comfort.

[0028]

In the case of such an absorbent article

the absorbent article is an absorbent article fastened with tapes and having two fastening tapes that extend from the rear waist zone towards two sides, outer in the lateral direction,

a waist stretch member that expands and contracts laterally is located in the rear waist region, and

in a state in which the absorbent article is expanded and stretched,

- the first surface zone is located on the front in the longitudinal direction of the side with respect to the waist stretching element.

[0029]

In the above-described absorbent article, the first surface area having the part in which the fibers are densely arranged (the high rigidity part) is not brought into close contact with the body of the wearer by the waist stretch member in a tight fit, thus improving the wearing comfort.

[0030]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the length of the zone without placement in the longitudinal direction is greater than the length of the placement zone in the longitudinal direction.

[0031]

In the above-described absorbent article, a non-placement area in which soft feces are easily received into the inside of the skin-facing sheet can be disposed at a large extent in the longitudinal direction, which can reduce the amount of soft feces that remain on the skin-facing sheet. side skin.

[0032]

In such an absorbent article

in the first surface zone, a plurality of protruding portions that protrude towards the skin side are arranged next to each other in the lateral direction.

[0033]

In the absorbent article described above, the protrusions make it possible to contain the flow of soft feces toward the rear side in the longitudinal direction, which can suppress leakage of soft feces from the rear side.

[0034]

In such an absorbent article

in the first surface zone, a plurality of protruding parts are located next to each other in the longitudinal direction.

[0035]

In the above-described absorbent article, the protruding portions make it possible to suppress the flow of soft feces flowing outward in the lateral direction, which makes it possible to suppress leakage of soft feces from the portion surrounding the leg opening.

[0036]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

the length of the zone without placement in the lateral direction is greater than the length of the zone of placement in the lateral direction.

[0037]

The absorbent article described above is more likely to receive soft feces that have spilled laterally into the inside of the skin-side sheet in the non-placement area, thereby reducing the amount of soft feces that remain on the skin-side sheet. .

[0038]

In the case of such an absorbent article

the absorbent article further comprises two parts which form leak-proof walls and which rise upwards towards the skin side, in two parts located on the sides of the absorbent body, and

in a state in which the absorbent article is expanded and stretched,

- at least a section of that part of the zone without accommodation, which protrudes laterally beyond the accommodation zone, is located on the side of the center in a lateral direction with respect to the parts forming the leakage-protecting walls.

[0039]

In the above-described absorbent article, in the non-accommodating area at a position laterally between the accommodating area and the leakage barrier forming part, soft feces can be directed towards the inside of the leakage barrier forming portion by receiving soft feces into the inside of the sheet. side facing the skin. Therefore, it is possible to suppress leakage of soft feces from the portion surrounding the leg opening.

[0040]

Method for manufacturing an absorbent article,

wherein the absorbent article has

absorbent body;

a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and

an intermediate sheet disposed between the absorbent body and the skin side sheet,

wherein the method includes:

the step of passing the skin side sheet between two rollers,

wherein the first area of the skin-facing side of the sheet is shaped with protrusions and recesses, and

- the second zone of the skin-facing side of the sheet is not shaped with protrusions and depressions,

- two rollers have a protruding part provided on the outer circumferential surface of at least any one of the two rollers,

- the second zone is the zone adjacent to the first zone in the direction of movement of the sheet facing the skin side; and

the step of joining the intermediate sheet and the skin side sheet,

wherein the intermediate sheet has a surface which is located on the side facing the skin and which is flat in contrast to the shape of the first zone with protrusions and recesses,

- at the same time, a connection is made in which one part of the intermediate sheet is attached to the second zone of the sheet facing the skin side,

- in this case, subsequently, a connection is made, in which the other part of the intermediate sheet is attached to the first zone of the sheet facing the skin side.

[0041]

In accordance with the method of manufacturing an absorbent article described above, the second zone is not shaped with projections and recesses, which makes it easier to attach the intermediate sheet without any wrinkles to this second zone when moving the second zone in a taut state, unlike the first zone. At the same time, it is easier to attach the intermediate sheet without any wrinkles to the first zone when the first zone is moved in a taut state.

[0042]

In this method of manufacturing an absorbent article

provide a greater length of the connected zone in the direction of movement, in which the second zone and the intermediate sheet are connected, compared with the length of the connected zone, in which the first zone and the intermediate sheet are connected, in the direction of movement.

[0043]

According to the above-described method for manufacturing an absorbent article, the bonded area in which the intermediate sheet and the second area are bonded, and which is easily formed without any wrinkles when joined, is elongated in the moving direction. Along with this, the bonded area in which the first area and the intermediate sheet are bonded is more likely to be obtained without any bonding wrinkles.

[0044]

In this method of manufacturing an absorbent article

an unconnected zone, to which the intermediate sheet is not attached, is formed in that part of the first zone, which is located along the direction of movement behind the connected zone, in which the first zone and the intermediate sheet are connected, and

provide a shorter length of the connected zone in the direction of movement, in which the first zone and the intermediate sheet are connected, compared with the length of the unconnected zone in the direction of movement.

[0045]

According to the above-described method for manufacturing an absorbent article, the bonded area in which the intermediate sheet and the first wrinkle risk area are connected becomes short in the direction of travel, which makes it possible to reduce wrinkle formation in the absorbent article.

[0046]

In this method of manufacturing an absorbent article

an unconnected zone, to which the intermediate sheet is not attached, is formed in that part of the first zone, which is located along the direction of movement behind the connected zone, in which the first zone and the intermediate sheet are connected, and

provide a greater length of the connected zone in the direction of movement, in which the second zone and the intermediate sheet are connected, compared with the length of the unconnected zone in the direction of movement.

[0047]

According to the above-described method for manufacturing an absorbent article, the bonded area in which the intermediate sheet and the second area are bonded, and which is easily formed without any wrinkles when joined, is elongated in the moving direction. Along with this, the bonded area in which the first area and the intermediate sheet are bonded is more likely to be obtained without any bonding wrinkles.

[0048]

With this method of manufacturing an absorbent article

the method further includes the step of folding the absorbent article at a location on the absorbent article that coincides in the direction of travel with the bonded zone at which the second zone and the intermediate sheet are connected.

[0049]

According to the above-described manufacturing method of the absorbent article, it is possible to suppress the wrinkling/flattening of the protrusions and recesses in the first region caused by the folding of the absorbent article.

[0050]

An absorbent article having a longitudinal direction and a lateral direction,

wherein the absorbent article contains:

absorbent body;

a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and

an intermediate sheet disposed between the absorbent body and the skin side sheet,

wherein the skin side sheet has a first zone and a second zone,

- the first zone is a zone in which a mold with protrusions and recesses is formed,

- the second zone is a zone that is adjacent to the first zone from the front in the longitudinal direction of the side;

while the first zone has a greater difference in the sparsity of the fibers in the direction in the plane of the sheet of the side facing the skin than the second zone,

while the surface of the intermediate sheet facing the skin is flat in contrast to the shape of the first zone with protrusions and recesses,

wherein the skin side sheet has a second bonded area and a first bonded area,

- the second connected zone is a zone in which one part of the intermediate sheet is attached to the second zone,

- the first connected zone is a zone in which another part of the intermediate sheet is attached to the first zone.

[0051]

In the absorbent article described above, the intermediate sheet can first be attached without any wrinkles to the second zone, which is likely to move under tension. Along with this, the intermediate sheet can be attached without any wrinkles to the first zone in a taut state. In the second zone, which has a small difference in the sparsity of the fibers, it is possible to ensure the rapid passage of urine throughout the entire length of the zone. In the first zone, it is possible to ensure that soft faeces are received into the inner part of the skin side of the sheet, from the parts in which the fibers are sparsely located.

[0052]

In such an absorbent article

the surface of the first zone, not facing the skin, forms a shape with protrusions and depressions, and

the non-skin-facing surface of the second zone is flat, in contrast to the non-skin-facing surface of the first zone.

[0053]

In the absorbent article described above, on the non-skin side of the first zone, a space is provided to allow soft feces to be received into this space. The flat surfaces of the second zone and the intermediate sheet are easily connected to each other without any wrinkles.

[0054]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the length of the second connected zone in the longitudinal direction is greater than the length of the first connected zone in the longitudinal direction.

[0055]

In the above-described absorbent article, the second bonded area, which is easily formed without any bonding wrinkles, becomes long in the longitudinal direction, and along with this, the formation of the first bonded area without any bonding wrinkles is also facilitated. The second connected area suitable for receiving urine during urination can be arranged at a long length in the longitudinal direction, which can suppress leakage of urine.

[0056]

In such an absorbent article

the first zone has an unconnected zone which is adjacent to the first connected zone on the longitudinally back side and to which the intermediate sheet is not attached, and

in a state in which the absorbent article is expanded and stretched,

- the length of the first connected zone in the longitudinal direction is less than the length of the unconnected zone in the longitudinal direction.

[0057]

In the absorbent article described above, the first bonded area in which there is a risk of wrinkling becomes short in the longitudinal direction, which makes it possible to reduce wrinkle formation in the absorbent article. The unconnected area where soft feces are easily received into the inside of the skin side sheet becomes long in the longitudinal direction, which can reduce the amount of soft feces that remain on the skin side sheet.

[0058]

In such an absorbent article

the first zone has an unconnected zone which is adjacent to the first connected zone on the longitudinally back side and to which the intermediate sheet is not attached, and

in a state in which the absorbent article is expanded and stretched,

- the length of the second connected zone in the longitudinal direction is greater than the length of the unconnected zone in the longitudinal direction.

[0059]

In the above-described absorbent article, the second bonded area, which is easily formed without any bonding wrinkles, becomes long in the longitudinal direction, and thus the formation of the first bonded area without any bonding wrinkles is also facilitated. The second connected zone suitable for receiving urine during urination can be arranged at a long length in the longitudinal direction, which can suppress leakage of urine.

[0060]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the center of the absorbent article in the longitudinal direction, coincides in the longitudinal direction with the second connected zone.

[0061]

In the absorbent article described above, the first zone suitable for receiving faeces during defecation may be located on the longitudinally rear side.

[0062]

In such an absorbent article

in the first zone, a plurality of protruding portions that protrude towards the skin side are arranged next to each other in the lateral direction.

[0063]

In the absorbent article described above, wrinkles that extend in the longitudinal direction can be separated by projections, which can reduce the formation of wrinkles in the absorbent article. The protruding parts make it possible to reduce the speed of the flow of soft feces, which passes towards the side rear in the longitudinal direction.

[0064]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the length of the intermediate sheet in the lateral direction, more than half the length of the first zone in the lateral direction.

[0065]

In the absorbent article described above, together with the second bonded area which is easily formed without any wrinkles when joined, the first bonded area is more likely to be formed without any wrinkles when bonded over a long distance in the lateral direction. It is possible to provide rapid movement of urine in the second connected zone, which is wide in the lateral direction.

[0066]

In such an absorbent article

in a state in which the absorbent article is expanded and stretched,

- the length of the intermediate sheet in the lateral direction is greater than the length of the first zone in the lateral direction.

[0067]

In the absorbent article described above, together with the second bonded area which is easily formed without any wrinkles when joined, the first bonded area is more likely to be formed without any wrinkles when bonded over a long distance in the lateral direction. It is possible to provide rapid movement of urine in the second connected zone, which is wide in the lateral direction.

[0068]

In the case of such an absorbent article

the absorbent article further comprises two parts which form leak-proof walls and which rise up towards the skin side, in two parts located on the sides of the absorbent body, and

in a state in which the absorbent article is expanded and stretched,

in the lateral direction, the lifting point of each of the parts forming the leakage protection walls is outside in the lateral direction with respect to the first zone.

[0069]

In the above-described absorbent article, the parts that form the leakage-proof walls rise stably upwards, which allows the parts that form the leakage-proof walls to form a barrier to soft feces.

[0070]

Embodiments

Embodiments will be described using disposable, tape-attached diapers for infants as examples of the absorbent article of the present invention. However, the absorbent article is not limited to this, and the present invention is also applicable to, for example, pull-on or pad-type disposable diapers, adult-taped disposable diapers, and the like.

[0071]

First Embodiment

Basic structure of disposable diaper 1, fastened

ribbons

Fig. 1 is a plan view of a disposable tape-fastened diaper 1 (hereinafter also referred to as "diaper") in an unfolded and stretched state. Fig. 2 is a sectional view taken along the line A-A shown in Fig. 1. The stretched state of the diaper 1 refers to a state in which the diaper 1 is stretched to such an extent that wrinkles in the diaper 1 are essentially no longer visible, and a state in which the diaper 1 is stretched to such an extent that the dimensions of its constituent elements (for example, the side sheet 7, described later) correspond to or close to the dimensions of such elements themselves.

[0072]

The diaper 1 has a longitudinal direction and a lateral direction that are orthogonal to each other, and has a rear waist region 1A, a crotch region 1B, and a front waist region 1C disposed side by side in the longitudinal direction. As shown in FIG. 2, the direction in which the constituent members of the diaper 1 are stacked on each other will be referred to as the thickness direction. The side in the thickness direction that comes into contact with the wearer's body will be referred to as the skin-facing side, and the side opposite the skin-facing side will be referred to as the non-skin-facing side.

[0073]

As shown in FIG. 2, the diaper 1 includes: an absorbent body 2 that absorbs excrement; a sheet 3 permeable to liquids and disposed on the skin-facing side, which is disposed on the skin-facing side with respect to the absorbent body 2; an intermediate sheet 4 permeable to liquids and located between the absorbent body 2 and the sheet 3 located on the side facing the skin; sheet 5, impervious to liquids, protecting against leakage and located on the non-skin side, in relation to the absorbent body 2; an outer sheet 6 located on the non-skin side of the leakage protection sheet 5, and two side sheets 7 provided on the two side portions of the skin side sheet 3. In addition, two fastening tapes 8 extend from the rear waist area 1A towards the two side outer sides.

[0074]

As an example of the absorbent body 2, an absorbent body obtained by shaping a liquid absorbent fiber, such as a cellulose fiber containing a superabsorbent polymer (so-called SAP), the SAP sheet having an SAP layer attached to a hydrophilic sheet, and the like. The surface of the absorbent body 2 may be formed by a core wrapping sheet 2A, such as a liquid-pervious, tissue paper or non-woven fabric.

[0075]

In the back waist region 1A, a waist stretch member 9 is provided that is stretched and pulled laterally (eg, a stretch film), and the diaper 1 is adjacent to the wearer's waist. In addition, lengthwise stretchable leg members 10 (e.g., elastic bands) are provided in the two side portions of the diaper 1, and the diaper 1 adheres to the legs of the wearer.

[0076]

In addition, the diaper 1 has two parts 11 that form leak-proof walls, and which rise towards the skin side, in two parts located on the sides of the absorbent body 2. The leak-proof wall part 11 is surrounded by end connected parts 12 and the longitudinal connected part 13, whereby the shape of the pocket is formed. The end connected parts 12 are parts in which the two ends of the side sheet 7 in the length direction are attached to the sheet 3 located on the skin side, and the longitudinal connected parts 13 are parts in which the side sheet 7 is attached to the sheet 3 facing the skin. to the skin of the side, outside in a lateral direction with respect to the end connected parts 12 throughout from one end in the longitudinal direction, to the other end in the longitudinal direction. In addition, at the front end (side-inner end) of each leakproof wall portion 11, there is a stretch member 14 of the leakproof wall portion that is stretched and contracted in the longitudinal direction (for example, an elastic vein). Therefore, the part 11 forming the leak-proof wall can rise upward towards the skin side from the place of the rise, which is the end 13a of the longitudinal joint part 13 inner in the side direction.

[0077]

The shape of the surface of the sheet 3, located on the side facing the skin

FIG. 3A is a sectional view of the second surface area 32 of the skin-facing side of the sheet 3, FIG. 3B is a sectional view of the first surface area 31 of the skin-facing side of the sheet 3, and FIG. a schematic representation illustrating how the sheet 3 located on the side facing the skin (the first surface area 31) is treated.

[0078]

The sheet 3 located on the side facing the skin has a first surface area 31 and a second surface area 32; the first surface area 31 is an area in which the skin side sheet 3 has a first surface shape, and the second surface area 32 is a area in which the skin side sheet has a second surface shape different from the first surface shapes. In this embodiment, in the first surface region 31 (FIG. 3B), the skin-facing surface and the non-skin-facing surface of the sheet 3 located on the skin-facing side are formed with protrusions and recesses. On the other hand, in the second surface region 32 (FIG. 3A), the skin-facing surface and the non-skin-facing surface of the sheet 3 located on the skin-facing side have flat shapes, in contrast to the forms of the first surface region 31 with protrusions and recesses. The first surface area 31 is formed by processing (forming protrusions and depressions) of the sheet 3 located on the skin side, which was flat like the second surface area 32.

[0079]

As an example of the treatment (formation of protrusions and recesses) of the first surface zone 31, a method in which the sheet 3 located on the skin side is passed between two forming rollers 20 and 21, as shown in Fig. 3C. It should be noted that FIG. 3C is an enlarged view of portions of the forming rollers 20 and 21. The two forming rollers 20 and 21 respectively have projections 20A and 21A on their own outer circumferential surfaces. As the two forming rollers 20 and 21 rotate, the protruding portions 21A of one forming roller 21 enter recesses 20B located between the protruding portions 20A of the other forming roller 20. come into contact with each other.

[0080]

As a result, in the first surface area 31, the skin-facing surface and the non-skin-facing surface of the skin-facing side sheet 3 will have raised and recessed shapes. In addition, those portions of the skin side sheet 3 which are located between the portions in contact with the protruding roller portions 20A and 21A are elongated in the thickness direction. Accordingly, as shown in FIG. 3B, in the portions 31B of the protrusions and recesses in the first surfaces of the zone 31 that form the side walls, the fibers are sparsely arranged, and in the portions 31A of the protrusions and recesses that form the tops, the fibers are densely arranged. That is, the first surface area 31, in which projections and depressions are formed, has a greater difference in fiber sparsity in the in-plane direction of the skin-facing side sheet 3, compared to the second surface area 32, in which projections and depressions are not formed.

[0081]

Absorbency of diaper 1

Fig. 4 is a view showing the arrangement of the first surface area 31 and the intermediate sheet 4. Fig. 5 is a view showing the arrangement of the first surface area 31 and the leakage-proof wall portion 11. 6A and 6B are explanatory diagrams illustrating how urine is absorbed. 7A-7C and 8A-8C are explanatory diagrams illustrating how soft feces are absorbed.

[0082]

As shown in Fig. 4, the sheet 3 located on the skin side is located at a large extent in the longitudinal direction and in the lateral direction of the diaper 1. The intermediate sheet 4 is smaller than the sheet 3 located on the skin side, and is located in the part of the diaper 1, central in the longitudinal direction and in the lateral direction. Specifically, the intermediate sheet 4 is located on both sides of the center CL of the diaper 1 in the longitudinal direction, and close to the front side in the longitudinal direction.

[0083]

In addition, as described above, the skin side sheet 3 has a first surface area 31 in which projections and depressions are formed, and a second surface area 32 in which projections and depressions are not formed. As shown in figure 4, the first surface area 31 is located on the rear side with respect to the center CL of the diaper 1 in the longitudinal direction.

[0084]

Therefore, the first surface zone 31 has a first accommodation zone 33 (accommodation zone of the present invention) and a first non-accommodation zone 34 (non-accommodation zone of the present invention); the first accommodating area 33 is an area that overlaps the skin-facing side of the intermediate sheet 4, and the first non-accommodating area 34 is an area that does not overlap the intermediate sheet 4. Further, in a state in which the diaper 1 is unfolded and stretched ( 4), the first accommodation area 33 is located on the rear side with respect to the center CL of the diaper 1 in the longitudinal direction, and the first non-accommodation area 34 is located on the rear side in the longitudinal direction with respect to the first placement area 33.

[0085]

The feces of an infant (particularly an infant whose age in months is relatively young) which is the target wearer of the diaper 1 of the present invention is soft feces. Therefore, the inventors of the present application placed artificial feces that simulated soft feces on the first placement area 33 and the first unplaced area 34, respectively, and observed them. In addition, after a predetermined period of time, the artificial skin was placed on the areas in which the artificial feces were placed, weights were placed on the artificial skin (weights were placed, each of which was approximately the same as the body pressure of the infant wearing the diaper). After that, the amount of artificial feces adhering to the artificial skin was examined.

[0086]

As a result, the viscosity of the artificial feces that remained on the first placement area 33 was higher than the viscosity of the artificial feces that remained on the first placement area 34 without placement. In addition, the amount (amount per certain area) of artificial feces that remained in the first placement area 33 was larger than the amount (amount per certain area) of artificial feces that remained in the first unaccommodated area 34. Accordingly, the amount of feces adhering to the artificial skin placed on the first placement area 33 was larger than the amount of feces sticking to the artificial skin placed on the first placement area 34 without placement.

[0087]

The following is a theoretical explanation of the above phenomenon. In the first accommodating area 33, as shown in FIGS. 7A-7C, soft feces first enter recesses 312 located between protrusions 311 that protrude on the skin-facing side of the skin-facing side sheet 3. Then, the moisture from the soft feces that has entered the recesses 312 quickly moves into the intermediate sheet 4 which is in contact with the skin side sheet 3 in the region of the recesses 312, thereby increasing the viscosity of the soft feces. In addition, the rate of penetration of moisture from soft feces is higher than the rate at which all soft feces are received into the inside of the sheet 3 located on the skin side. Accordingly, the viscosity of the soft feces is increased until all the soft feces are received into the inside of the skin side sheet 3 . The possibility of receiving soft feces having an increased viscosity into the inside of the skin side sheet 3 is reduced. Therefore, it can be considered that in the first placement zone 33, the viscosity of soft feces remaining on the surface is high, and that the amount of remaining soft feces and the amount of soft feces adhering to the skin become relatively large.

[0088]

On the other hand, in the first unplaced zone 34, as shown in FIGS. 8A-8C, the intermediate sheet 4 is not positioned under the skin side sheet 3. Accordingly, there is no situation where only the moisture from the soft feces that has entered the recesses 312 of the sheet 3 located on the skin-side side is displaced at first. Therefore, all soft feces are received into the inside of the sheet 3 located on the side facing the skin. In particular, since the fibers are rarely located in those portions 31B of protrusions and recesses in the skin-facing side sheet 3 that form side walls, soft feces are received into the spaces 313 that are inside the protrusions 311 from the portions 31B forming side walls. Therefore, it can be considered that in the first unplaced zone 34, the viscosity of soft feces remaining on the surface does not increase, and that the amount of remaining soft feces and the amount of soft feces adhering to the skin become small.

[0089]

Therefore, it is preferable that the first surface area 31, in which the protrusions and recesses are formed, be located on the rear side with respect to the center CL of the diaper 1 in the longitudinal direction (that is, be located in the feces receiving area during defecation), and that the first surface area 31 had a first accommodating area 33 that overlaps the intermediate sheet 4 and a first non-accommodating area 34 that does not overlap the intermediate sheet 4 as in the diaper 1 of this embodiment. In addition, it is preferable that the first area 34 without placement was located on the rear side with respect to the first area 33 placement.

[0090]

In such a case, at first, the moisture from the soft feces discharged in the first placement area 33 or the soft feces that have flowed into the first placement area 33 can be quickly transferred to the intermediate sheet 4. Accordingly, it is possible to contain the flow (reduce the flow rate) of the soft feces. and suppress the leakage of soft feces from the back side. Thereafter, the soft feces that have moved and flowed into the first unaccommodated area 34 provided on the rear side, behind the first accommodating area 33 in which highly viscous soft feces remain, can be received into the inside of the skin side sheet 3. Therefore, it is possible to reduce the amount of soft feces that remain on the skin side sheet 3, which makes it possible to reduce the adhesion of soft feces to the wearer's skin.

[0091]

As an example of the intermediate sheet 4, a sheet which has a coarser structure (has larger pores between fibers than the absorbent body 2 (core wrapping sheet 2A) and has a high liquid transmission rate (absorption rate) can be cited. For example, as an example of the intermediate sheet 4 is a sheet containing a nonwoven fabric bonded by passing air through, a spunbond nonwoven fabric or a cellulose fiber subjected to crosslinking, etc. Liquid transmission rates (absorption rates) can be compared by a well-known method. For example, a sample is obtained having only the absorbent body 2, and a sample having an intermediate sheet 4 located on the absorbent body 2. In addition, corresponding cylinders are placed on the samples, a predetermined amount of liquid is poured into each of the cylinders. from each cylinder, by means of th compare the flow rate of the liquid. Alternatively, magnified images of the sections of the absorbent body 2 and the intermediate sheet 4, which are cut in the thickness direction, are obtained, and in the enlarged images, each of the sections will be enlarged by about 20-100 times with an electron microscope or the like. In addition, using the image analysis software, the area of the pore portions per determined sectional area of the absorbent body 2 (core wrapping sheet 2A) and the area of the pore portions per determined sectional area of the intermediate sheet are calculated. 4 and compare them.

[0092]

In addition, the first surface area 31 of this embodiment has a ridge and recess shape formed by a pair of forming rolls 20 and 21 (FIG. 3C), and the fiber density will be lower in the projection and recess portions 31B that form the side walls. than those parts 31A of the protrusions and recesses that form the tops. As described above, it is preferable that the first surface region 31 has a larger difference in fiber sparsity in the in-plane direction of the skin-facing side of the sheet 3 than the second surface region 32. In such a case, soft feces are easily received into the interior of the sheet 3 located on the side facing the skin, of the parts of the first surface zone 31 in which the fibers are sparse (those parts 31B of projections and recesses that form the side walls). This makes it possible to reduce the amount of soft feces that remain on the first surface zone 31 (in particular, on the first zone 34 without placement).

[0093]

Alternatively, in the case where the skin-facing surface of the first surface zone 31 is shaped with protrusions and recesses, the flow of soft feces can be contained, in contrast to the case where the skin-facing surface is flat, such as in the second surface zone 32. In addition, because the first surface area 31 is shaped with protrusions and recesses, the soft feces that have entered the recesses 312 can be moved closer to the intermediate sheet 4, which allows moisture from the soft feces to be quickly transferred to the intermediate sheet 4 and provides the ability to contain the flow of soft feces. Therefore, it is possible to suppress leakage of soft feces from the rear side.

[0094]

Differences in fiber sparsity can be compared by a well-known method. For example, magnified images of the sections of the first surface area 31 and the second surface area 32 are taken, which are cut in the thickness direction, and in the magnified images, each of the sections will be magnified by about 20 to 100 times by an electron microscope or the like. In addition, for the section of the first surface zone 31, the difference between the number of fibers per certain area of the part in which the fibers are densely arranged (the tip forming part 31A) and the number of fibers per certain area of the part in which the fibers are sparsely located ( of the sidewall part 31B), the difference being defined as the difference in the sparsity of the fibers in the first surface zone 31. Similarly, for the section of the second surface zone 32, the difference between the number of fibers per certain area of the part in which the fibers are tightly packed, and the number of fibers per certain area of the part in which the fibers are sparse, the difference being defined as the difference in fiber sparsity in the second surface zone 32. It is recommended to compare these differences in fiber sparsity with each other. Alternatively, differences in fiber sparsity can be compared visually on enlarged sectional views.

[0095]

In addition, it is preferable that in the first surface zone 31 a space is provided between the sheet 3 located on the skin-facing side and the material adjacent to the sheet 3 located on the skin-facing side, on the non-skin-facing side (intermediate sheet 4 or absorbent body 2). Since the non-skin-facing surface of the skin-side sheet 3 is formed with protrusions and recesses in this embodiment, spaces 313 are provided between protrusions 311 that protrude towards the skin side and the material disposed thereunder. In such a case, more soft feces can be received in the spaces 313 under the skin side sheet 3, which can further reduce the amount of soft feces that remain on the skin side sheet 3.

[0096]

Further, it is preferable that in the state in which the diaper 1 is unfolded and stretched (FIG. 4), the length L3 of the first accommodating zone 34 in the longitudinal direction is larger than the length L2 of the first accommodating zone 33 in the longitudinal direction (L3>L2 ). In such a case, the first unplaced area 34, in which soft feces are easily received into the inside of the skin side sheet 3, can be arranged for a long length in the longitudinal direction. This makes it possible to further reduce the amount of soft feces that remain on the skin side sheet 3 .

[0097]

In addition, it is preferable that similarly to the first surface zone 31, the second surface zone 32 also has a second accommodation zone 35 which overlaps the intermediate sheet 4 on the side facing the skin. Further, it is preferable that in the state in which the diaper 1 is unfolded and stretched, at least a portion of the second accommodation area 35 is located on the longitudinally front side with respect to the first accommodation area 33. That is, the second accommodating area 35 is preferably located in the urination receiving area.

[0098]

The second surface zone 32 is a zone in which projections and depressions are not formed and the difference in the sparsity of the fibers is small. Therefore, in the second surface area 32, there is no portion in which the fiber density is high and urine does not move easily, and the urine moves easily in the entire area. Accordingly, in the second accommodating area 35, urine can be quickly conveyed to the intermediate sheet 4 throughout its entire length, which can suppress leakage of urine. In addition, by virtue of the intermediate sheet 4, not only is the urine absorption performance improved, but also the reverse flow of urine from the absorbent body 2 can be suppressed.

[0099]

Further, it is preferable that in the state in which the diaper 1 is unfolded and stretched (FIG. 4), the length (L1) of the second accommodating area 35 in the longitudinal direction is greater than the sum of the length (L2) of the first accommodating area 33 in the longitudinal direction, and length (L3) of the first zone 34 without placement in the longitudinal direction (L1 > L2+L3). In such a case, the second accommodating area 35 suitable for receiving urine during urination may be arranged over a long length in the longitudinal direction. This enables the urine, which has a higher fluidity than soft feces, to be quickly transferred to the intermediate sheet 4 in the second placement zone 35, which is large in the longitudinal direction, which can suppress urine leakage.

[0100]

In addition, in the projections and recesses 311 formed in the first surface region 31, the fiber density is relatively high and the rigidity is high. In the case of the diaper 1 fastened with tapes, the parts whose positions coincide in the longitudinal direction with the position of the fastening tape 8 are in close contact with the wearer's skin with a stronger fit. Therefore, it is preferable that in the state in which the diaper 1 is unfolded and stretched, the first surface area 31 is located at the longitudinally front side with respect to the centers 8a of the fastening tapes 8 in the longitudinal direction, as shown in FIG. In such a case, it is possible to prevent the situation in which the fastening tapes 8 cause the high rigidity portions provided in the first surface region 31 to be in close contact with the wearer's skin to strongly adhere, thereby improving the wearing comfort.

[0101]

Similarly, in the case of the diaper 1 fastened with tapes, the part that overlaps the waist stretch member 9 in the longitudinal direction and is in close contact with the wearer's skin fits more strongly. Therefore, it is preferable that in the state in which the diaper 1 is unfolded and stretched, the first surface area 31 is located on the longitudinally front side with respect to the waist stretch member 9, as shown in FIG. In such a case, it can be prevented that the waist stretch member 9 causes the high rigidity portions provided in the first surface region 31 to be in close contact with the wearer's skin to be firmly attached, thereby improving the wearing comfort.

[0102]

Further, in this embodiment, in the first surface region 31, protrusions and recesses are formed only in the skin side sheet 3, and protrusions and recesses are not formed in the intermediate sheet 4. Therefore, unlike the case in which the protrusions and recesses are formed in in the intermediate sheet 4 as well as in the skin side sheet 3, the formation of protrusions and depressions does not lead to an excessive increase in the density of the fibers, which can reduce the stiffness and enable the wearing comfort to be improved. However, the configuration is not limited to this. Protrusions and recesses can be formed in the intermediate sheet 4 as well as in the skin side sheet 3 in the first surface zone 31.

[0103]

Further, it is preferable that in the first surface area 31, a plurality of protruding portions 311 that protrude towards the skin side are arranged next to each other at intervals in the lateral direction, as shown in FIG. When the portions that protrude towards the skin side in the first surface area 31 have a predetermined length in the lateral direction as described above, it is possible to reduce the flow rate of soft feces that flows towards the side rear in the longitudinal direction. Therefore, it is possible to suppress leakage of soft feces from the rear side.

[0104]

In addition, it is preferable that the plurality of protruding portions 311 arranged in the lateral direction are arranged in a certain order in the longitudinal direction. That is, it is preferable that the plurality of protruding portions 311 are located next to each other also at intervals in the longitudinal direction. When the portions that protrude towards the skin side in the first surface area 31 have a predetermined length in the longitudinal direction as described above, it is possible to reduce the flow rate of soft feces that passes in the lateral direction. Therefore, leakage of soft feces from the leg openings can be suppressed.

[0105]

It should be noted that the projection and recess shape of the first surface region 31 is not limited to the projection and recess shape shown in FIG. For example, a plurality of laterally elongated projections in which a plurality of laterally adjacent projections 311 are combined can be arranged side by side in the longitudinal direction. In addition, in Fig. 5, the positions of the protrusions 311 adjacent to each other in the longitudinal direction are aligned in the lateral direction, but may not be aligned.

[0106]

In addition, as shown in FIG. 5, it is preferable that in the state in which the diaper 1 is unfolded and stretched, the length W2 of the first non-lateral placement area 34 is longer than the length W1 of the first side placement area 33 (W2 >W1). In such a case, soft feces that have spread laterally can be taken into the inside of the skin-side sheet 3 in the first zone 34 without placement. This makes it possible to further reduce the amount of soft feces that remain on the skin side sheet 3.

[0107]

Further, it is preferable that, in the state in which the diaper 1 is unfolded and stretched, at least a portion of that portion of the first unaccommodated area 34 that protrudes outward in a lateral direction with respect to the first placement area 33 (in the case of FIG. 5, the protruding portions 311, painted black) was located on the side of the center in the lateral direction with respect to the part 11 forming a leak-proof wall, as shown in Fig.5. In such a case, in the first accommodating area 34 at a location in the lateral direction between the first accommodating area 33 and the leakage-proof wall part 11, soft feces can be guided to the inside of the leak-proof wall part 11 by receiving soft faeces into the inside of the sheet 3 facing the skin side. Therefore, the leakage-proof wall portion 11 easily forms a soft feces barrier, which makes it possible to suppress leakage of soft feces from the leg opening.

[0108]

It should be noted that in FIG. 5, the first accommodating area 33 and the first non-accommodating area 34 do not overlap in the longitudinal direction, but the configuration is not limited to this. Although not shown, the following configuration is also acceptable: at a location that overlaps the first placement area 33 in the longitudinal direction, the first surface area 31 protrudes outward in the lateral direction relative to the intermediate sheet 4, and the first placement area 33 and the first area 34 without placement are located next to each other in the lateral direction.

[0109]

Modified examples of sheet 3 located with

side facing the skin

First modified example

The following configuration is acceptable: the first surface region 31 is shaped with protrusions and indentations on any one of the skin-facing surface and the non-skin-facing surface, and the first surface region 31 is shaped which is flat—as opposed to the protrusion shape. and recesses on the other of the surface facing the skin and the surface not facing the skin (not shown). Such a first surface zone 31 is formed, for example, by a pair of shaping rollers 20 and 21, in which the projections are formed on the outer circumferential surface of only one of the two shaping rollers 20 and 21 and in which the outer circumferential surface of the other of the two shaping rollers 20 and 21 is flat.

[0110]

Even in this case, the surface shape of the first surface zone 31 is different from the surface shape of the second surface zone 32, in which the protrusions and depressions are not formed (eg, FIG. 3A). In addition, the difference in fiber sparseness is large in the first surface zone 31 in contrast to the second surface zone 32. In addition, in the first accommodation zone 33, which overlaps the intermediate sheet 4 in the first surface zone 31, moisture from soft feces can be transferred. into intermediate sheet 4 and suppress the flow of soft feces. On the other hand, in the first unaccommodated zone 34 which does not overlap the intermediate sheet 4 in the first surface zone 31, it is possible to receive soft feces into the inner part of the skin side sheet 3 of the fiber sparse parts.

[0111]

In particular, in the case where the skin-facing surface has a raised and recessed shape and the non-skin-facing surface is flat in the first surface region 31, the raised-and-pitted shape of the skin-facing surface can provide flow containment. soft feces. On the contrary, in the case where the skin-facing surface is flat and the non-skin-facing surface is shaped with protrusions and recesses in the first surface region 31, it is possible to provide space under the skin-facing sheet 3, thereby allowing more soft feces into this space.

[0112]

Second modified example

The first surface area 31 may have a through hole that extends through the skin side sheet 3 in the thickness direction (not shown). Such a first surface zone 31 is formed, for example, by passing an acicular protrusion through the first surface zone 31.

[0113]

Even in this case, the surface shape of the first surface zone 31 is different from the surface shape of the second surface zone 32 without a through hole (eg, FIG. 3A). In addition, in the first surface area 31, there are almost no fibers in the through hole, and therefore, the difference in fiber sparsity between the through hole part and the through hole part is large. Therefore, the difference in fiber sparseness in the first surface zone 31 is larger than in the second surface zone 32. In addition, in the first placement zone 33, which overlaps the intermediate sheet 4 in the first surface zone 31, soft feces can come into contact with the intermediate sheet 4 in the through hole, which allows the moisture from the soft feces to move into the intermediate sheet 4 and makes it possible to contain the flow of soft feces. On the other hand, in the first unaccommodated area 34 that does not overlap the intermediate sheet, in the first surface area 31, it is possible to receive soft feces into the inside of the diaper 1 from the through hole.

[0114]

Third modified example

The description has been given above of the second surface zone 32, which has a flat shape, but the configuration is not limited to this. The skin-facing surface of the material that forms the skin-facing side sheet 3 may be formed from a nonwoven fabric shaped with ridges and grooves (for example, a nonwoven fabric shaped with ridges and grooves formed by blowing fluid toward the fibrous web ). In this case, the skin-facing surface of the second surface zone 32 is also shaped with protrusions and recesses. Even in this case, processing such as forming protrusions and indentations or forming a through hole is performed on the nonwoven fabric shaped with protrusions and indentations on the skin-facing surface, whereby the first surface area 31 is formed, and thereby such same effect as described above. In addition, after performing the same processing (formation of projections and depressions or formation of a through hole) for the first surface region 31 and the second surface region 32, additional processing can be performed only for the first surface region 31. Even in this case, the same effect as described above.

[0115]

Fourth Modified Example

In the above embodiment, the intermediate sheet 4 overlaps the first surface area 31 and the second surface area 32, but the configuration is not limited to this. For example, the following configuration is also acceptable: the first surface zone 31 extends from the front side in the longitudinal direction, and the intermediate sheet 4 only overlaps the first surface zone 31 and does not overlap the second surface zone 32. Also in this case, it is sufficient that part of the first zone 33 placement that overlaps the intermediate sheet 4 in the first surface area 31 is located on the rear side with respect to the center CL of the diaper 1 in the longitudinal direction, and that at least a part of the first area 34 without placement that does not overlap the intermediate sheet 4 is located from the rear in the longitudinal direction of the side with respect to the first zone 33 placement.

[0116]

Fifth Modified Example

The second surface zone 32 may have a greater difference in the sparsity of the fibers in the in-plane direction of the skin-facing side of the sheet 3 than the first surface zone 31. processing to form through holes), but the first surface zone 31 is not processed. Even in this case, the transfer of moisture from the soft feces to the intermediate sheet 4 makes it possible to contain the flow of soft feces in the first placement area 33, while the flow of soft feces is restrained by projections and depressions in the second surface area 32 or the like. In addition, since the first non-accommodating zone 34 does not initially move moisture from soft feces, it is possible to ensure that all soft feces are received in the inside of the skin side sheet 3 .

[0117]

Previously, the above embodiment has been described to facilitate understanding of the present invention, and not to interpret the present invention in a restrictive manner. The present disclosure may be varied or modified in various ways without departing from its spirit and covers its equivalents.

[0118]

For example, the following are not limited to the above examples: the locations of the first surface zone 31 and the second surface zone 32, the relationship between the lengths of the first zone 33 of the placement, the first zone 34 without placement and the second zone 35 of the placement in the longitudinal direction and in the lateral direction, the relative position of the first zone 34 without placement and the leakage-proof wall portion 11, and the like.

[0119]

Second Embodiment

Basic configuration of disposable diaper 100,

fastened with tapes

Fig. 9 is a plan view of the banded diaper 100 (hereinafter simply referred to as "diaper") in the unfolded and stretched state. Fig. 10 is a sectional view taken along the line A-A shown in Fig. 9. The stretched state of the diaper 100 refers to a state in which the diaper 100 is stretched to such an extent that wrinkles in the diaper 100 are essentially no longer visible, and a state in which the diaper 100 is stretched to such an extent that the dimensions of its constituent elements (for example, the side sheet 107, described later) correspond to or close to the dimensions of such elements by themselves.

[0120]

The diaper 100 has a longitudinal direction and a lateral direction that are orthogonal to each other, and has a rear waist region 101A, a crotch region 101B, and a front waist region 101C disposed side by side in the longitudinal direction. As shown in FIG. 10, the direction in which the constituent members of the diaper 100 are stacked will be referred to as the thickness direction. The side in the thickness direction that comes into contact with the wearer's body will be referred to as the skin-facing side, and the side opposite the skin-facing side will be referred to as the non-skin-facing side.

[0121]

As shown in FIG. 10, the diaper 101 includes: an absorbent body 102 that absorbs excrement; a skin-side liquid-pervious sheet 103 that is located on a skin-side side with respect to the absorbent body 102; an intermediate sheet 104 permeable to liquids and located between the absorbent body 102 and the sheet 103 located on the skin side; a liquid-impermeable and leak-proof sheet 105 located on a non-skin side with respect to the absorbent body 102; an outer sheet 106 located on the non-skin side of the leakage protection sheet 105, and two side sheets 107 provided on the two side portions of the skin side sheet 103. In addition, two fastening tapes 108 extend from the rear waist area 101A towards the two side outer sides.

[0122]

An example of an absorbent body 102 is an absorbent body formed by shaping a liquid absorbent fiber, such as a cellulose fiber containing a superabsorbent polymer (so-called SAP), wherein the SAP sheet has an SAP layer attached to a hydrophilic sheet, and the like. The surface of the absorbent body 102 may be formed by a core wrap sheet 102A, such as a liquid-pervious, tissue paper or non-woven fabric.

[0123]

In the back waist region 101A, a waist stretch member 109 is provided that is stretched and pulled laterally (eg, a stretch film), and the diaper 101 fits against the wearer's waist. In addition, lengthwise stretchable leg members 1010 (e.g., elastic bands) are provided on the two side portions of the diaper 101, and the diaper 101 adheres to the legs of the wearer.

[0124]

In addition, the diaper 101 has two portions 1011 that form leak-proof walls, and which rise toward the skin side, in two portions located on the sides of the absorbent body 102. The leak-proof wall portion 1011 is surrounded by end-connected parts 1012 and the longitudinal connected part 1013, whereby the shape of the pocket is formed. The end connected parts 1012 are parts in which the two ends of the side sheet 107 in the length direction are attached to the skin side sheet 103, and the longitudinal connected parts 1013 are parts in which the side sheet 107 is attached to the skin side sheet 103 , outside in a lateral direction with respect to the end connected parts 1012 throughout from one end in the longitudinal direction, to the other end in the longitudinal direction. In addition, at the front end (side inner end) of each leakproof wall portion 1011, there is a leakproof wall portion stretch member 1014 that is stretched and contracted in the longitudinal direction (for example, an elastic vein). Therefore, the leak-proof wall forming portion 1011 can rise upward toward the skin side from the rise point, which is the end 1013a of the longitudinal joint portion 1013 inner in the lateral direction.

[0125]

Diaper manufacturing method 100

Fig. 11 is a view schematically showing a portion of the device 200 for manufacturing the diaper 100. Fig. 12 is an enlarged view of projection and recess portions 211 and 221. FIG. 13A is a sectional view of the intermediate sheet 104, FIG. 13B is a sectional view of the first zone 1031 of the skin-facing side of the sheet 103, and FIG. sides. 14 is a schematic view illustrating a state in which the intermediate sheets 104 are attached to the skin side sheets 103 (continuous member). 15A-15C are explanatory diagrams illustrating the step of folding the diaper 100.

[0126]

Apparatus 200 for making a diaper 100

The diaper 100 manufacturing apparatus 200 has two forming rollers 210 and 220 and a connecting roller 230. One of the two forming rollers will be referred to as the first forming roller 210 and the other will be referred to as the second forming roller 220. In the diaper manufacturing apparatus 200 100, the direction of movement of materials is defined as the MD direction, and the direction that is orthogonal to the MD direction and runs along the plane of the material is defined as the CD direction, and the direction that is orthogonal to the MD direction and the CD direction is defined as the up-down direction.

[0127]

The two forming rollers 210 and 220 and the connecting roller 230 are rollers that rotate in a state in which the axial direction passes in the CD direction. The first forming roller 210, the second forming roller 220, and the connecting roller 230 are arranged sequentially from top to bottom. The first forming roller 210 and the second forming roller 220 are opposite each other, and the second forming roller 220 and the connecting roller 230 are opposite each other.

[0128]

On the outer circumferential surface of each of the first forming roller 210 and the second forming roller 220, a plurality of projection and recess portions 211 or 221 are provided at intervals in the direction of rotation. In the portion 211 (221) for forming protrusions and recesses, a plurality of recesses 210B (220B) are provided between the plurality of protrusions 210A (220A). The projection and recess portions 211 and 221 of both rollers 210 and 220 are positioned to engage with each other at the point where both rollers 210 and 220 face each other.

[0129]

Diaper manufacturing method 100

The manufacturing method of the diaper 100 includes: a shaping step in which the skin side sheet 3 is shaped with protrusions and recesses; a joining step in which the intermediate sheet 104 is joined to the skin side sheet 103; and a folding step in which the diaper 100 is folded for packaging.

[0130]

(shaping stage)

In the shaping step, the continuous skin side sheet 103 is fed between two forming rollers 210 and 220 (hereinafter, the skin side sheet 103 continuous will also be simply referred to as skin side sheet 103). The direction in which the skin-side sheet 103 continues corresponds to the MD direction in the production device 200, and the width direction of the skin-side sheet 103 corresponds to the CD direction in the production device 200. As described above, parts 211 and 221 of both the protrusions and recesses 210 and 220 engage with each other between two forming rollers 210 and 220. As shown in FIG. the protruding portions 210A of the first forming roller 210 fit into the recesses 220B of the second forming roller 220. Therefore, the skin-facing surface and the non-skin-facing surface of the skin-side sheet 103 that extends between the two forming rollers 210 and 220 will have protrusion molds. and indentations.

[0131]

Here, in the two forming rollers 210 and 220, the portions 211 and 221 for forming projections and recesses are spaced apart. Therefore, when the skin side sheet 103 passes between the two forming rollers 210 and 220, at the moment when the protrusion and recess portions 211 and 221 of both rollers 210 and 220 are opposed to each other, the sheet 103, located on the side facing the skin, is shaped with protrusions and recesses. In the case where the portions of both rollers 210 and 220 except for the projection and recess portions 211 and 221 are opposed to each other, the skin side sheet 103 is not shaped with projections and recesses.

[0132]

That is, in the shaping step, the skin side sheet 103 is passed between the two forming rollers 210 and 220, whereby the first zone 1031 (FIG. 13B) of the skin side sheet 103 is shaped with protrusions and recesses, but the second the zone 1032 (FIG. 13C) of the skin-facing side of the sheet 103, that is, the zone 1032 that is adjacent to the first zone 1031 in the MD direction, is not shaped with protrusions and indentations. In the second zone 1032, in which no projections and recesses are formed, the skin-facing surface and the non-skin-facing surface form shapes that are flat in contrast to the projections and recesses of the first zone 1031.

[0133]

It should be noted that the two forming rollers 210 and 220 are preferably heated in advance, or the preheated sheet 103 located on the skin side is fed between the two forming rollers 210 and 220. In such a case, the shape with the protrusions and depressions of the first sheet area 1031 is easily maintained. 103 side facing the skin.

[0134]

(connection stage)

The skin-side sheet 103 having projections and recesses formed in the first zone 1031 is continuously moved along the outer circumferential surface of the second forming roller 220. On the other hand, the intermediate sheet 104 is cut to its size in the product and then moved along the outer circumferential surface of the connecting roller 230. The protrusions and recesses are not formed in the intermediate sheet 104 by the two forming rollers 210 and 220. Therefore, the skin-facing surface and the non-skin-facing surface of the intermediate sheet 104 (FIG. 13A) are flat, in contrast to the protrusions and recesses shape the first zone 1031 of the sheet 103 facing the skin side. In addition, in this embodiment, the intermediate sheet 104 is located in the diaper portion 100 in the longitudinal direction, as shown in Fig.9. Therefore, on the outer circumferential surface of the connecting roller 230, a plurality of intermediate sheets 104 are moved at intervals in the direction of rotation.

[0135]

In addition, when the skin-side sheet 103 and the intermediate sheet 104 pass between the second forming roll 220 and the joining roll 230, both sheets 103 and 104 are pressed and connected to each other by both rolls 220 and 230. Note that, as a method, connection, a well-known connection method such as adhesive bonding, heat sealing or ultrasonic welding can be used.

[0136]

Here, as shown in FIG. 11, one part of the intermediate sheet 104 is connected to the second region 1032 of the skin side sheet 103, and then another part of the intermediate sheet 104 is connected to the first region 1031 of the skin side sheet 103. Therefore, as shown in FIG. 14, the second bonded area 1052, which is the bonded area in which the second area 1032 of the skin side sheet 103 and the intermediate sheet 104 are bonded, is located downstream in the direction of movement in front of the first bonded area 1051, which is a connected area in which the first area 1031 of the skin side sheet 103 and the intermediate sheet 104 are connected.

[0137]

(Folding stage)

Subsequently, the absorbent body 102, the leakage protection sheet 105, and the like are combined with the sheet in which the skin-side sheet 103 and the intermediate sheet 104 are connected, whereby the diaper 100 in the unfolded state shown in FIG. 9 is manufactured. In a state in which the lateral direction of the diaper 100 corresponds to the CD direction of the production apparatus 200 and in which the longitudinal direction of the diaper 100 corresponds to the MD direction of the production apparatus 200 (moving direction), the diaper 100 is folded as shown in FIGS. 15A to 15C. First, the two side portions (lateral in the CD direction) of the diaper 100 are folded inward in the lateral direction along the fold lines FL1, and then the diaper 100 is folded in half in the longitudinal direction along the fold line FL2 extending at the center CL of the diaper 100 in the longitudinal direction (moving direction). In this state, the diaper 100 is packed. The method of folding the packaging diaper shown in FIGS. 15A-15C is an example and is not limited thereto.

[0138]

Features of the manufacturing method

In the case of forming projections and depressions by passing a sheet between two forming rollers 210 and 220 as described above, the sheet is stretched in multiple directions, and a difference in fiber sparsity is created in the sheet. For example, the portions of the skin side sheet 103 that are located between the portions coming into contact with the projection portions 210A and 220A of the forming rollers 210 and 220 are stretched in the thickness direction. Therefore, as shown in FIG. 13B, in the side wall forming portions 1031B of the protrusions and recesses in the first region 1031, the fibers become sparsely spaced, and in the apex forming portions of the projections and recesses 1031A, the fibers become densely spaced. That is, in the first region 1031 in which the projections and recesses are formed, the difference in the sparsity of the fibers in the in-plane direction of the skin side sheet 103 becomes large compared to the second region 1032 in which the projections and recesses are not formed.

[0139]

In the first zone 1031, in which the difference in fiber sparsity is large, the pulling force for moving the skin side sheet 103 will be applied unevenly, making the tension of the skin side sheet 103 more likely to loosen. When the intermediate sheet 104 is attached to the first region 1031 of the skin-facing side sheet 103 having a relaxed tension, there is a possibility that a wrinkle will form in the joined portion. In particular, the skin side sheet 103 and the intermediate sheet 104 have low rigidity and are likely to be loosened compared to the absorbent body 102. Therefore, in this embodiment, in which the sheets 103 and 104 that are likely to be loosened are bonded to each other, there is a possibility of wrinkling, unlike the case where the absorbent body 102 is bonded to the skin side sheet 103.

[0140]

Therefore, in the manufacturing method of this embodiment, it is preferable that one part of the intermediate sheet 104 is attached to the second zone 1032 of the skin-facing side sheet 103, and that subsequently the other part of the intermediate sheet 104 is attached to the first zone 1031 of the sheet 103 located on the skin-facing side. to the skin of the side.

[0141]

In the second region 1032 of the skin-side sheet 103, in which projections and depressions are not formed and the difference in fiber sparsity is small, the pulling force to move the skin-side sheet 103 is likely to be uniformly applied. Accordingly, one part of the intermediate sheet 104 is more likely to be attached without any wrinkles to the second zone 1032, which is under tension. In the connected part, in which the second zone 1032 and the intermediate sheet 104 are connected to each other without any wrinkles, the rigidity is increased. Therefore, the first area 1031 of the skin side sheet 103 and the other part of the intermediate sheet 104 which is located before the connected part "behave" in accordance with the tension state of the previously connected part and are not easily subjected to tension release. This allows the first area 1031 of the skin side sheet 103 and the other part of the intermediate sheet 104 to be connected in a taut state, thereby reducing the likelihood of wrinkling in the connected part.

[0142]

In addition, the intermediate sheet 104 is not shaped with projections and recesses together with the skin side sheet 103, and the skin facing surface of the intermediate sheet 104 is flat. Similarly, the second zone 1032 of the skin-facing side sheet 103 is not shaped with protrusions and recesses, and the non-skin-facing surface of the second zone 1032 is flat. Accordingly, the flat surfaces of the second zone 1032 and the intermediate sheet 104 are firmly attached to each other without any wrinkles. In this case, the first zone 1031 and the intermediate sheet 104 are also easily connected to each other without any wrinkles.

[0143]

In addition, since the intermediate sheet 104 is not formed into a projection and recess shape together with the skin side sheet 103, there is no excessive increase in the density of the portions in which the fibers become closely packed due to the formation of projections and recesses, which can reduce rigidity. Therefore, it is possible to make the portion in which the projections and recesses are formed (the first region 1031) softer and improve the wearing comfort of the diaper 100.

[0144]

Further, it is preferable that in the joining step, as shown in FIG. 14 in the direction of movement, the length (L102) of the bonded area (second bonded area 1052) in which the second area 1032 of the skin side sheet 103 and the intermediate sheet 104 are connected is longer than the length (L101) of the bonded area (the first bonded area 1051) in the moving direction, in which the first area 1031 of the skin side sheet 103 and the intermediate sheet 104 (L102>L101) are connected. In such a case, the second bonded area 1052, which is easily formed without any joining wrinkles, becomes long in the moving direction while being moved under tension, and the formation of the first bonded area 1051 without any joining wrinkles is also facilitated.

[0145]

In addition, the following configuration is acceptable: an unbonded zone 1053, in which the intermediate sheet 104 is not attached, is formed in that part of the first zone 1031 which is located behind in the direction of movement with respect to the first connected zone 1051. Even in this case, it is preferable that the length ( L102) of the second connected zone 1052 in the direction of movement was greater than the length (L103) of the unconnected zone 1053 (L102 > L103) in the direction of movement. In such a case, the second bonded area 1052, which is easily formed without any joining wrinkles, becomes long in the moving direction while being moved under tension, and the formation of the first bonded area 1051 without any joining wrinkles is also facilitated.

[0146]

In addition, the intermediate sheet 104 is not attached to the first unattached zone 1053, but the absorbent body 102 having a high rigidity is attached directly thereto. Accordingly, the formation of a wrinkle is difficult, despite the fact that the unconnected area 1053 is an area in which protrusions and depressions are formed. Therefore, it is preferable that the length (L101) of the first connected zone 1051 in the direction of movement is less than the length (L103) of the unconnected zone 1053 (L101 < L103) in the direction of movement. In such a case, the first connected area 1051 in which there is a risk of wrinkling becomes short in the direction of travel, which can further reduce wrinkling in the diaper 100.

[0147]

Further, preferably, in the folding step as shown in FIG. 15B, the diaper 100 is longitudinally folded at a location of the diaper 100 that coincides in the longitudinal direction (moving direction) of the diaper 100 with the second bonded area 1052. In such a case, no fold line will be located in the first zone 1031 in which the projections and depressions are formed, which can suppress flattening of the projection and depression mold. In addition, the intermediate sheet 104 is located in the second bonded area 1052, and the second bonded area 1052 has a relatively high rigidity, which enables the diaper 100 to be securely folded.

[0148]

Diaper 100 made by the manufacturing method

diaper 100

Fig. 16 is a schematic plan view of a diaper 100 manufactured by the diaper 100 manufacturing apparatus 200. Fig. 17 is a view showing the arrangement of the first area 1031 of the skin-side sheet 103 and the leakage-proof wall forming portion 1011. 18 is a schematic plan view of the diaper 100 in a modified example. 19A and 19B are explanatory diagrams illustrating how urine is absorbed. 20A-20C and 21A-21C are explanatory diagrams illustrating how soft feces are absorbed.

[0149]

The direction MD (material flow direction) in the device 200 for making the diaper 100 corresponds to the longitudinal direction of the diaper 100, and the CD direction corresponds to the lateral direction of the diaper 100. In addition, the side rearward in the direction of movement of the materials corresponds to the side of the diaper 100 rearward in the longitudinal direction. direction, and the forward side corresponds to the front side of the diaper 100 in the longitudinal direction.

[0150]

The skin side sheet 103 in the diaper 100 manufactured as described above includes: a first area 1031 that has projections and depressions formed by shaping with projections and depressions by a pair of forming rollers 210 and 220, and a second a zone 1032 which is adjacent to the first zone 1031 on the longitudinally front side and has no protrusions and depressions formed therein. In addition, the first zone 1031 has a larger difference in fiber sparsity in the in-plane direction of the skin side sheet 103 than the second zone 1032. In addition, the skin side sheet 103 has a second connected zone 1052 and a first connected zone 1051 ; in the second bonded zone 1052, one part of the intermediate sheet 104 is attached to the second zone 1032, and in the first bonded zone 1051, another part of the intermediate sheet 104 is attached to the first zone 1031.

[0151]

In such a diaper 100, during manufacture, the intermediate sheet 104 can first be attached without any wrinkles to the second zone 1032, which is likely to move under tension. In this case, the intermediate sheet 104 can be attached in a taut state without wrinkles to the first zone 1031, in which the protrusions and depressions are formed. Therefore, it is difficult to form a wrinkle in the bonded areas in which the skin side sheet 103 and the intermediate sheet 104 are bonded, and the quality of the diaper 100 is improved.

[0152]

In addition, the protrusions and recesses similar to the protrusions and recesses in the skin-facing side sheet 103 are not formed in the intermediate sheet 104, and therefore the skin-facing surface of the intermediate sheet 104 is flat, unlike the protrusion-and-cavity shape of the first zone 1031 of the sheet 103, located on the side facing the skin. Therefore, unlike the case in which, for example, the intermediate sheet 104 is shaped with protrusions and recesses together with the skin side sheet 103, there is no excessive increase in the density of the portions in which the fibers become tightly packed due to the formation of protrusions and recesses, which to reduce stiffness. Therefore, it is possible to make the portion (first region 1031) in which the projections and recesses are formed softer and improve the wearing comfort of the diaper 100.

[0153]

In addition, the second area 1032 (the second connected area 1052) is located on the front in the longitudinal direction of the side, that is, in the area of receiving urine when urinating. In the second zone 1032, the difference in fiber sparsity is small, and there is no part in which the fiber density is high and urine does not easily pass through. Therefore, as shown in FIGS. 19A and 19B, in the second zone 1032, urine can be rapidly permeated through the entire zone and leakage of urine can be suppressed. In addition, in the second bonded area 1052 in which the intermediate sheet 104 is located, the urine absorption capacity is enhanced, and furthermore, urine backflow can also be suppressed.

[0154]

On the other hand, the first zone 1031 (the first connected zone 1051) is located on the longitudinally rear side, that is, in the feces receiving zone during defecation. The feces of an infant (particularly an infant who is relatively young in months) that is the target wearer of the diaper 100 of this embodiment is soft feces. Therefore, in the first zone 1031 (in the sidewall portions 1031B shown in FIG. 13B), soft feces are easily received into the interior of the skin side sheet 103 of the fiber sparse portions. Therefore, in the first zone 1031, it is possible to reduce the amount of soft feces that remain on the surface and reduce the amount of soft feces adhering to the wearer.

[0155]

In addition, in the case where the skin-facing surface of the first zone 1031 is shaped with protrusions and indentations, the flow of soft feces can be suppressed, unlike the case where the skin-facing surface is flat, such as in the second zone 1032. This allows suppress the leakage of soft feces from the rear side or leg openings.

[0156]

An example of the intermediate sheet 104 is a sheet that has a coarser structure (having larger pores between the fibers) than the absorbent body 102 (core wrap sheet 102A) and has a high liquid transmission rate (absorption rate). For example, as an example of the intermediate sheet 104, a sheet containing a through-air bonded nonwoven, a spunbonded nonwoven, or a crosslinked cellulose fiber, and the like can be cited. Liquid transmission rates (absorption rates) can be compared by a well-known method. For example, a sample having only the absorbent body 102 and a sample having an intermediate sheet 104 located on the absorbent body 102 are obtained. In addition, respective cylinders are placed on the samples, a predetermined amount of liquid is poured into each of the cylinders. Also, time intervals are measured from the moment the liquid is filled to the moment the liquid exits from each cylinder, whereby the liquid flow rates are compared. Magnified cross sections of the absorbent body 102 and the intermediate sheet 104 are taken, which are cut in the thickness direction, and in the magnified images, each of the sections will be magnified by about 20 to 100 times by an electron microscope or the like. In addition, using the image analysis software, the area of the pore portions per determined sectional area of the absorbent body 102 (core wrap sheet 102A) and the area of the pore portions per determined sectional area of the intermediate sheet are calculated. 104 and compare them.

[0157]

In addition, differences in fiber sparsity can be compared by a well-known method. For example, magnified images of the sections of the first zone 1031 and the second zone 1032 are taken, which are cut in the thickness direction, and in the magnified images, each of the sections will be magnified by about 20 to 100 times by an electron microscope or the like. In addition, for the section of the first zone 1031, the difference between the number of fibers per certain area of the part in which the fibers are densely arranged (the tip forming part 1031A) and the number of fibers per certain area of the part in which the fibers are sparsely located (the parts 1031B forming the side wall), the difference being defined as the difference in the sparsity of the fibers in the first zone 1031. Similarly, for the cross section of the second zone 1032, the difference between the number of fibers per certain area of the part in which the fibers are tightly packed and the number of fibers in calculated on a certain area of the part in which the fibers are sparse, and the difference is defined as the difference in the sparsity of the fibers in the second zone 1032. It is recommended to compare these differences in the sparsity of the fibers with each other. Alternatively, differences in fiber sparsity can be compared visually on enlarged sectional views.

[0158]

In addition, since the protrusions 210A and 220A are provided on both outer circumferential surfaces of the two forming rollers 210 and 220 in the production device 200 (FIG. 11), the non-skin surface of the first zone 1031 forms a mold with protrusions and recesses. Therefore, spaces 10313 are formed in the first zone 1031 between the skin-side sheet 103 and the material adjacent to the non-skin side side sheet 103 (intermediate sheet 104 or absorbent body 102). More soft feces are allowed to be received in these spaces 10313, which can further reduce the amount of soft feces that remain on the skin side sheet 103.

[0159]

On the other hand, the non-skin-facing surface of the second zone 1032, in which no protrusions and recesses are formed, is flat, in contrast to the non-skin-facing surface of the first zone 1031. Therefore, it becomes easy to securely connect the flat surfaces of the second zone 1032 and the intermediate sheet 104 without any wrinkles. Meanwhile, the first bonded area 1051 is also easily formed when bonded without any wrinkles.

[0160]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16), the length (L102) in the longitudinal direction of the second bonded area 1052 is longer than the length (L101) in the longitudinal direction of the first bonded area 1051 (L102 > L101). In such a case, the second bonded area 1052, which is easily formed without any joining wrinkles, can become long in the longitudinal direction while being moved under tension, and the formation of the first bonded area 1051 without any joining wrinkles is also facilitated. In addition, the second connected area 1052, which is suitable for receiving urine when urinating, can be located at a large extent in the longitudinal direction. Therefore, urine, which has a higher fluidity than soft feces, can be quickly moved to the intermediate sheet 104 in the second joint area 1052, which is large in the longitudinal direction, which can suppress leakage of urine.

[0161]

In addition, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16), the center CL of the diaper 100 in the longitudinal direction coincides in the longitudinal direction with the second connected zone 1052. In other words, it is preferable that the first zone 1031, in which protrusions and recesses are formed, was located on the rear side with respect to the center CL of the diaper 100 in the longitudinal direction. In such a case, the second connected area 1052, which is suitable for receiving urine during urination, may be located on the front side with respect to the center CL of the diaper 100 in the longitudinal direction, and the first area 1031, which is suitable for receiving feces during defecation, may be located with back side with respect to the second connected area 1052. This makes it possible to reduce the amount of soft feces that remain in the first area 1031 while suppressing urine leakage.

[0162]

In addition, in the packaged state, the diaper 100 is often folded in half in the longitudinal direction at the center CL of the diaper 100 in the longitudinal direction, as shown in Fig. 15B. Accordingly, the second connected area 1052 is located in the region of the center CL of the diaper 100 in the longitudinal direction, which reduces the possibility of folding the diaper 100 in the first area 1031, in which the protrusions and recesses are formed. Therefore, flattening of the formed projections and recesses can be suppressed. In addition, the intermediate sheet 104 is located in the second bonded area 1052, and the second bonded area 1052 has a relatively high rigidity, which allows the diaper 100 to be securely folded.

[0163]

In addition, it is preferable that in the first zone 1031, a plurality of protruding portions 10311 that protrude towards the skin side are arranged next to each other at intervals in the lateral direction, as shown in FIG. To this end, it is recommended that a plurality of projections 210A and 220A located in the CD direction be provided on the outer circumferential surfaces of the two forming rolls 210 and 220 (FIG. 11). In such a case, longitudinal wrinkles (wrinkles that extend in the MD direction) that are likely to occur in the first area 1031 of the skin-facing side sheet 103 moving in the MD direction (in the longitudinal direction of the diaper 100) can be separated by the protruding portions 210A and 220A of the forming rollers 210 and 220. This reduces the likelihood of wrinkles in the first connected zone 1051.

[0164]

In addition, the plurality of protrusions 10311 located in the lateral direction make it possible to reduce the flow rate of the soft feces, which passes towards the side rear in the longitudinal direction. Therefore, leakage of soft feces from the back side can be suppressed.

[0165]

In addition, it is preferable that a plurality of protruding portions 10311 arranged next to each other in the lateral direction are arranged in the longitudinal direction. That is, it is preferable that the plurality of projections 10311 are also spaced in the longitudinal direction. In such a case, it is possible to reduce the speed of the flow of soft feces, which passes in the lateral direction. Therefore, leakage of soft feces from the leg openings can be suppressed.

[0166]

It should be noted that the projection and recess shape of the first zone 1031 is not limited to the projection and recess shape shown in FIG. For example, a plurality of laterally elongated projections in which a plurality of laterally adjacent projections 10311 are combined together may be arranged adjacent to each other in the longitudinal direction. In addition, in Fig.17, the locations of the protruding portions 10311 adjacent to each other in the longitudinal direction are aligned in the lateral direction, but may not be aligned.

[0167]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16) in the side direction, the length W101 of the intermediate sheet 104 is larger than half the length W102 of the first zone 1031 in the side direction (W101>W102/2). Furthermore, in the state in which the diaper 100 is unfolded and stretched, the sidewise length W101 of the intermediate sheet 104 may be longer than the sidewise length W102 of the first zone 1031 (W101 > W102), as in the modified example of Fig. 18 .

[0168]

As described above, providing a long length W101 of the intermediate sheet 104 in the lateral direction makes it possible to make the second joint zone 1052 long in the lateral direction, which is easily formed without any joint wrinkles, being moved under tension. Therefore, it is also more likely that the first bonded area 1051, together with the second bonded area 1052, will be formed over a large extent laterally when joined without any wrinkles. In addition, the second connected area 1052, which is suitable for receiving urine when urinating, is located at a large length in the lateral direction, which allows urine to quickly move into the intermediate sheet 104 for a long distance in the lateral direction and can suppress urine leakage.

[0169]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched as shown in FIG. , was outside in a lateral direction with respect to the first zone 1031. That is, it is preferable that the lifting place of the part 1011 forming the leakage protection wall is not in the first zone 1031, which forms a shape with protrusions and recesses, and which has a large difference in fiber sparseness. In such a case, the leak-proof wall portion 1011 rises stably upward, which allows the leak-proof wall portion 1011 to form a barrier to soft feces.

[0170]

In addition, the first region 1031 of the skin side sheet 103 may have an unbonded region 1053 that is adjacent to the first longitudinally back bonded region 1051 and to which the intermediate sheet 104 is not attached.

[0171]

As described above, the feces of an infant (particularly an infant whose age in months is relatively young) that is the target wearer of the diaper 100 of this embodiment is soft feces. Therefore, the inventors of the present application placed artificial feces that simulated soft feces, respectively, on the first connected zone 1051 and unconnected zone 1053 and observed them. In addition, after a predetermined period of time, the artificial skin was placed on the areas in which the artificial feces were placed, weights were placed on the artificial skin (weights were placed, each of which was approximately the same as the body pressure of the infant wearing the diaper). After that, the amount of artificial feces adhering to the artificial skin was examined.

[0172]

As a result, the viscosity of the artificial feces that remained on the first connected zone 1051 was higher than the viscosity of the artificial feces that remained on the non-connected zone 1053. In addition, the amount (amount per certain area) of the artificial feces that remained on the first connected zone 1051, there was more than the amount (number per certain area) of the artificial feces that remained on the unbonded area 1053. Accordingly, the amount of feces adhering to the artificial skin placed on the first connected area 1051 was greater than the amount of feces adhering to the artificial skin, placed on unconnected area 1053.

[0173]

The following is a theoretical explanation of the above phenomenon. In the first bonded zone 1051, as shown in FIGS. 20A-20C, soft feces first enter recesses 10312 located between protrusions 10311 that protrude on the skin-facing side of the skin-facing side sheet 103. Then, moisture from the soft feces that has entered the recesses 10312 quickly moves into the intermediate sheet 104 which is in contact with the skin side sheet 103 in the area of the recesses 10312, thereby increasing the viscosity of the soft feces. In addition, the penetration rate of moisture from soft feces is higher than the rate at which all soft feces are received into the inside of the skin side sheet 103 . Accordingly, the viscosity of the soft feces is increased until all the soft feces are received into the inside of the skin side sheet 103 . The possibility of receiving soft feces having increased viscosity into the inside of the skin side sheet 103 is reduced. Therefore, it can be considered that in the first bonded zone 1051, the viscosity of soft feces remaining on the surface is high, and that the amount of remaining soft feces and the amount of soft feces adhering to the skin become relatively large.

[0174]

On the other hand, in the unbonded area 1053, as shown in FIGS. 21A-21C, the intermediate sheet 104 is not positioned under the skin side sheet 103. Accordingly, there is no situation where only the moisture from the soft feces that has entered the recesses 10312 of the skin side sheet 103 first moves. Therefore, all soft feces are received into the inside of the skin side sheet 103 . In particular, since the fibers are rarely located in those portions 1031B of the protrusions and recesses in the skin-side sheet 103 that form the side walls, soft feces are received into the spaces 10313 that are inside the protrusions 10311 from the side wall portions 1031B. Therefore, it can be considered that in the unbonded zone 1053, the viscosity of soft feces remaining on the surface does not increase, and that the amount of remaining soft feces and the amount of soft feces adhering to the skin become small.

[0175]

Therefore, it is preferable that an unconnected area 1053 be provided on the back side of the first connected area 1051, as in the diaper 100 of this embodiment. Accordingly, at first, moisture from the soft feces discharged in the first bonded area 1051 or the soft feces that have flowed into the first bonded area 1051 can rapidly move into the intermediate sheet 104. Accordingly, it is possible to contain the flow (reduce the flow rate) of the soft feces and suppress leakage. soft feces from the back. Thereafter, the soft feces that have moved and flowed into the unbonded area 1053 provided on the rear side behind the first bonded area 1051 in which the highly viscous soft feces remain can be received into the inside of the skin side sheet 103. Therefore, it is possible to reduce the amount of soft feces that remain on the skin side sheet 103, which makes it possible to suppress the adhesion of soft feces to the wearer's skin.

[0176]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16) in the longitudinal direction, the length (L101) of the first connected area 1051 is smaller than the length (L103) in the longitudinal direction of the unconnected area 1053 (L101 < L103 ). In such a case, the non-connected area 1053, in which soft feces are easily received into the inside of the skin-facing sheet 103, can be arranged over a long length in the longitudinal direction. This makes it possible to further reduce the amount of soft feces that remain on the skin side sheet 103 . In addition, the first bonded area 1051 in which there is a risk of wrinkling becomes short in the longitudinal direction, thereby reducing the possibility of wrinkling in the skin side sheet 103.

[0177]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16) in the longitudinal direction, the length (L102) of the second bonded region 1052 is longer than the length (L103) of the non-bonded region 1053 (L102 > L103) in the longitudinal direction. direction. More preferably, the length (L102) in the longitudinal direction of the second connected zone 1052 is greater than the sum of the length (L101) of the first connected zone 1051 in the longitudinal direction, and the length (L103) of the unconnected zone 1053 in the longitudinal direction (L102 > L101+L103).

[0178]

In such a case, the second connected zone 1052, which is suitable for receiving urine during urination, can be located at a large extent in the longitudinal direction. This allows the urine to move rapidly into the intermediate sheet 104 over a long distance in the longitudinal direction, which can suppress urine leakage. In addition, the second bonded area 1052, which is easily formed without any bonding wrinkles, can become long in the longitudinal direction while being moved under tension, and the formation of the first bonded area 1051 without any bonding wrinkles is also facilitated.

[0179]

Further, it is preferable that in the state in which the diaper 100 is unfolded and stretched (FIG. 16) in the longitudinal direction, the length (L101) of the first bonded area 1051 is less than half the length of the diaper 100 (product length L104) in the longitudinal direction (L101 < L104/2). More preferably, the sum of the length (L101) of the first connected zone 1051 in the longitudinal direction, and the length (L103) of the unconnected zone 1053 in the longitudinal direction, was less than half the length of the diaper 100, that is, the product length L104 in the longitudinal direction (L101+L103 < L104/2). In such a case, the first bonded area 1051 in which there is a risk of wrinkling becomes short in the longitudinal direction, thereby reducing the possibility of wrinkling in the skin side sheet 103. In addition, the first connected area 1051 and the unconnected area 1053 may be located in the fecal receiving area during defecation, which is located on the rear side with respect to the center CL of the diaper 100 in the longitudinal direction.

[0180]

In addition, in the projections and recesses 10311 formed in the first region 1031, the fiber density is relatively high and the rigidity is high. In the case of the diaper 100 fastened with tapes, the parts whose positions coincide in the longitudinal direction with the position of the fastening tape 108 are in close contact with the wearer's skin and adhere to it more strongly. Therefore, it is preferable that in the state in which the diaper 100 is unfolded and stretched, the first area 1031 is located on the longitudinally front side with respect to the centers 108a of the fastening tapes 108 in the longitudinal direction, as shown in FIG. In such a case, it is possible to prevent the situation in which the fastening tapes 108 cause the high rigidity portions provided in the first region 1031 to be in close contact with the skin of the wearer to strongly adhere, thereby improving the wearing comfort.

[0181]

Similarly, in the case of the diaper 100 fastened with tapes, the part that overlaps the waist stretch member 109 in the longitudinal direction and is in close contact with the skin of the wearer fits more tightly. Therefore, it is preferable that in the state in which the diaper 100 is unfolded and stretched, the first area 1031 is located on the longitudinally front side with respect to the waist stretch member 109, as shown in FIG. In such a case, it is possible to prevent the waist stretch member 109 from causing the high rigidity portions provided in the first region 1031 to be in close contact with the wearer's skin to be strongly attached, thereby improving the wearing comfort.

[0182]

Modified examples of sheet 103 facing skin

sides

First modified example

The following configuration is acceptable: the first zone 1031 is shaped with protrusions and indentations on any one of the skin-facing surface and the non-skin-facing surface, and the first zone 1031 is shaped which is flat—as opposed to the protrusion-and-indentation shape - on the other of the skin-facing surface and the non-skin-facing surface (not shown). Such a first zone 1031 is formed, for example, by a pair of shaping rollers 210 and 220, in which the protrusions are formed on the outer circumferential surface of only one of the two shaping rollers 210 and 220 and in which the outer circumferential surface of the other of the two shaping rollers 210 and 220 is flat . In this case, the intermediate sheet 104 is first attached to the second zone 1032 in which no protrusions and depressions are formed, thereby reducing the possibility of wrinkling in the joint zone in which the skin side sheet 103 and the intermediate sheet 104 are connected.

[0183]

Second modified example

The second zone 1032 has been described above, which has a flat shape, but the configuration is not limited to this. The skin-facing surface of the material that forms the sheet 103 located on the skin-facing side may be formed from a nonwoven material having a projection and recess shape (for example, a nonwoven material having a projection and recess shape formed by blowing fluid in the direction to the fibrous web), and the skin-facing surface of the second zone 1032 may be shaped with protrusions and recesses. Also in this case, the difference in fiber sparsity becomes small in the second zone 1032 compared to the first zone 1031 in which the projections and recesses are formed by the two forming rollers 210 and 220. In addition, after the formation of the projections and recesses in the first zone 1031 and the second zone 1032, additional protrusions and recesses can only be formed in the first zone 1031. Also in this case, the difference in fiber sparsity becomes small in the second zone 1032 compared to the first zone 1031. Therefore, in this case, the intermediate sheet 104 is first attached to the second zone 1032, thereby reducing the possibility of wrinkling in the joint area in which the skin side sheet 103 and the intermediate sheet 104 are connected.

[0184]

Third modified example

In the above embodiment, an unconnected area 1053 is provided on the rear side of the first connected area 1051, but the configuration is not limited to this. The following configuration is also acceptable: the intermediate sheet 104 extends in the longitudinal direction of the diaper 100 towards the rear side beyond the rear end of the first zone 1031, the intermediate sheet 104 is attached to the first zone 1031 along its entire length in the longitudinal direction, and there is no unconnected zone 1053.

[0185]

Previously, the above embodiment has been described to facilitate understanding of the present invention, and not to interpret the present invention in a restrictive manner. The present disclosure may be varied or modified in various ways without departing from its spirit and covers its equivalents.

[0186]

For example, the above examples are not limited to the following: the ratio between the lengths of the first connected zone 1051, the second connected zone 1053, the unconnected zone 1053 and the intermediate sheet 104 in the longitudinal direction (direction of movement) or in the lateral direction, the relative position of the first zone 1031 and the part 1011 forming a leak-proof wall, and the like.

[List of reference items]

[0187]

1 - Disposable diaper, fastened with tapes (absorbent article),

2 - absorbent body, 3 - skin side sheet, 4 - intermediate sheet,

5 - leakage protection sheet, 6 - outer sheet, 7 - side sheet,

8 - fastening tape, 9 - belt stretching element,

101 leg stretcher, 11 leakage proof wall part,

20, 21 - shaping roller,

31 - the first surface zone, 31A the part forming the top, 31B the part forming the side wall,

32 - second surface zone,

33 - the first zone of accommodation (zone of accommodation), 34 - the first zone without accommodation (zone without accommodation),

35 - the second area of placement,

100 - disposable diaper fastened with tapes (absorbent article),

102 absorbent body, 103 skin side sheet, 104 intermediate sheet,

105 - leakage protection sheet, 106 - outer sheet, 107 - side sheet,

108 - fastening tape, 109 - waist stretch element,

1010 leg tensile member, 1011 leakage proof wall portion,

210, 220 - shaping roller (pair of rollers), 210A, 220A - projecting part,

1031 - the first zone, 1031A - the part that forms the top, 1031B - the part that forms the side wall,

10311 - projecting part, 10312 - recess, 10313 - space,

1032 - second zone,

1051 - first connected zone, 1052 - second connected zone, 1053 - unconnected zone.

Claims (118)

1. An absorbent article having a longitudinal direction and a lateral direction, wherein the absorbent article contains: absorbent body; a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and an intermediate sheet positioned between the absorbent body and the skin side sheet, wherein the skin side sheet has a first surface area and a second surface area where the first surface zone has a first surface shape, and - the second surface zone has a second surface shape different from the first surface shape, the first surface zone has an accommodation zone and an unaccommodated zone, where the accommodating area is the area that overlaps the intermediate sheet on the side facing the skin, - the zone without placement is the zone that does not overlap the intermediate sheet, and a space is provided in the first surface zone between the skin-side sheet and the material which is adjacent to the skin-side sheet on the non-skin side side, wherein the first surface zone has a greater difference in the sparsity of the fibers in the direction in the plane of the skin side of the sheet than the second surface zone, and in a state in which the absorbent article is expanded and stretched - the placement area is located only on the rear side with respect to the center of the absorbent article in the longitudinal direction, - at least part of the zone without accommodation is located on the rear side in the longitudinal direction with respect to the accommodation zone, and - at least part of the second surface zone is provided on the rear side in the longitudinal direction with respect to the zone without placement. 2. An absorbent article according to claim 1, wherein in the first surface zone the skin side sheet is shaped with protrusions and recesses, and - the part forming the side wall of the protrusions and recesses has a low fiber density compared to the part forming the top of the protrusions and recesses. 3. The absorbent article according to claim 1 or 2, wherein the second surface zone has a second accommodating zone that overlaps the intermediate sheet on the skin-facing side, and in a state in which the absorbent article is expanded and stretched, - at least part of the second accommodation zone is located on the front side in the longitudinal direction with respect to the accommodation zone. 4. An absorbent article according to claim 3, wherein in a state in which the absorbent article is expanded and stretched, - the length of the second placement zone in the longitudinal direction is greater than the sum of the length of the placement zone in the longitudinal direction and the length of the zone without placement in the longitudinal direction. 5. An absorbent article according to any one of claims 1 to 4, wherein the absorbent article is a tape-fastened absorbent article having two bonding tapes that extend from the rear waist region towards the two laterally outer sides, and in a state in which the absorbent article is expanded and stretched, - the first surface zone is located on the front side in the longitudinal direction with respect to the centers of the fastening tapes in the longitudinal direction. 6. An absorbent article according to any one of claims 1 to 5, wherein the absorbent article is a tape-fastened absorbent article having two fastening tapes that extend from the rear waist region towards the two laterally outer sides, in the back waist zone there is a waist stretch element, which is stretched and contracted in the lateral direction, and in a state in which the absorbent article is expanded and stretched, - the first surface zone is located on the front in the longitudinal direction of the side with respect to the waist stretching element. 7. An absorbent article according to any one of claims 1 to 6, wherein in a state in which the absorbent article is expanded and stretched, - the length of the zone without placement in the longitudinal direction is greater than the length of the placement zone in the longitudinal direction. 8. An absorbent article according to any one of claims 1 to 7, wherein in the first surface zone, a plurality of protruding portions that protrude towards the skin side are arranged next to each other in the lateral direction. 9. An absorbent article according to claim 8, wherein in the first surface zone, a plurality of protruding parts are located next to each other in the longitudinal direction. 10. An absorbent article according to any one of claims 1 to 9, wherein in a state in which the absorbent article is expanded and stretched, the length of the zone without placement in the lateral direction is greater than the length of the zone of placement in the lateral direction. 11. The absorbent article according to claim 10, wherein the absorbent article further comprises two parts forming leak-proof walls that rise upward towards the skin side, in two parts located on the sides of the absorbent body, and in a state in which the absorbent article is expanded and stretched, - at least a section of that part of the zone without accommodation, which protrudes laterally beyond the accommodation zone, is located on the side of the center in a lateral direction with respect to the parts forming the leakage-protecting walls. 12. Method for manufacturing an absorbent article, where the absorbent article has absorbent body; a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and an intermediate sheet disposed between the absorbent body and the skin side sheet, wherein the method includes: the step of passing the skin side sheet between two rollers, wherein - the first area of the skin side of the sheet is shaped with protrusions and recesses, and - the second area of the skin side of the sheet is not shaped with protrusions and depressions, - two rollers have a protruding part provided on the outer circumferential surface of at least any one of the two rollers, - the second zone is the zone adjacent to the first zone in the direction of movement of the sheet facing the skin side; and the step of joining the intermediate sheet and the skin side sheet, wherein - the intermediate sheet has a surface facing the skin side, which is flat, - performing a connection in which one part of the intermediate sheet is attached to the second zone of the sheet facing the skin side, and then, a join is made in which the other part of the intermediate sheet is attached to the first area of the sheet facing the skin side. 13. A method for manufacturing an absorbent article according to claim 12, wherein the length of the connected zone, in the direction of movement, in which the second zone and the intermediate sheet are connected, is made larger compared to the length of the connected zone, in the direction of movement, in which the first zone and the intermediate sheet are connected. 14. A method for manufacturing an absorbent article according to claim 12 or 13, wherein form an unconnected zone, to which the intermediate sheet is not attached, in that part of the first zone, which is located along the direction of movement behind the connected zone, in which the first zone and the intermediate sheet are connected, and the length of the connected zone, in the direction of movement, in which the first zone and the intermediate sheet are connected, is made smaller compared to the length of the unconnected zone, in the direction of movement. 15. A method for manufacturing an absorbent article according to any one of claims 12-14, wherein form an unconnected zone, to which the intermediate sheet is not attached, in that part of the first zone, which is located along the direction of movement behind the connected zone, in which the first zone and the intermediate sheet are connected, and the length of the connected zone, in the direction of movement, in which the second zone and the intermediate sheet are connected, is made larger compared to the length of the unconnected zone, in the direction of movement. 16. A method for manufacturing an absorbent article according to any one of claims 12-15, wherein the method further includes the step of folding the absorbent article at a location of the absorbent article that coincides in the direction of travel with the bonded zone at which the second zone and the intermediate sheet are connected. 17. An absorbent article having a longitudinal direction and a lateral direction, wherein the absorbent article contains: absorbent body; a skin-side sheet that is located on a skin-side side with respect to the absorbent body; and an intermediate sheet disposed between the absorbent body and the skin side sheet, wherein the skin side sheet has a first zone and a second zone where - the first zone is a zone in which a mold with protrusions and recesses is formed, and - the second zone is a zone that is adjacent to the first zone from the front side in the longitudinal direction; the first zone has a greater difference in the sparsity of the fibers in the direction in the plane of the skin side of the sheet than the second zone, the skin-facing surface of the intermediate sheet is flat, and the skin side sheet has a second bonded area and a first bonded area, where - the second connected zone is a zone in which one part of the intermediate sheet is attached to the second zone, and - the first connected zone is a zone in which another part of the intermediate sheet is attached to the first zone, while the first zone has an unconnected zone which is adjacent to the first connected zone from the rear side in the longitudinal direction, and to which the intermediate sheet is not attached, and the first connected zone is only provided on the rear side with respect to the center in the longitudinal direction. 18. The absorbent article according to claim 17, wherein the non-skin-facing surface of the first zone forms a shape with protrusions and recesses, and the non-skin-facing surface of the second zone is flat. 19. The absorbent article according to claim 17 or 18, wherein in a state in which the absorbent article is expanded and stretched, - the length of the second connected zone in the longitudinal direction is greater than the length of the first connected zone in the longitudinal direction. 20. An absorbent article according to any one of claims 17 to 19, wherein in a state in which the absorbent article is expanded and stretched, - the length of the first connected zone in the longitudinal direction is less than the length of the unconnected zone in the longitudinal direction. 21. An absorbent article according to any one of claims 17 to 20, wherein in a state in which the absorbent article is expanded and stretched, - the length of the second connected zone in the longitudinal direction is greater than the length of the unconnected zone in the longitudinal direction. 22. An absorbent article according to any one of claims 17 to 21, wherein in a state in which the absorbent article is expanded and stretched, - the center of the absorbent article in the longitudinal direction coincides with the second connected zone in the longitudinal direction. 23. An absorbent article according to any one of claims 17 to 22, wherein in the first zone, a plurality of protruding portions are disposed side by side with each other in the lateral direction, which protrude towards the skin side. 24. An absorbent article according to any one of claims 17 to 23, wherein in a state in which the absorbent article is expanded and stretched, - the length of the intermediate sheet in the lateral direction, more than half the length of the first zone in the lateral direction. 25. The absorbent article according to claim 24, wherein in a state in which the absorbent article is expanded and stretched, - the length of the intermediate sheet in the lateral direction is greater than the length of the first zone in the lateral direction. 26. An absorbent article according to any one of claims 17 to 25, wherein the absorbent article further comprises two parts which form leak-proof walls and which rise up to the side of the skin, in two parts located on the sides of the absorbent body, and in a state in which the absorbent article is expanded and stretched, in the lateral direction, the lifting point of each of the parts forming the leakage protection walls is outside in the lateral direction with respect to the first zone.

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