CN114788760A

CN114788760A - Method for manufacturing absorbent article and absorbent article

Info

Publication number: CN114788760A
Application number: CN202210079492.2A
Authority: CN
Inventors: 吉田英聪; 黑原健志; 丹下雄贵
Original assignee: Oji Holdings Corp
Current assignee: Oji Holdings Corp
Priority date: 2021-01-26
Filing date: 2022-01-24
Publication date: 2022-07-26
Also published as: CN217186765U

Abstract

The application provides a method for manufacturing an absorbent article and an absorbent article. A method for manufacturing an absorbent article having an absorbent body (6) that absorbs liquid discharged by a wearer, the method comprising: a pressing step of forming a pressed portion by pressing the absorbent body (6) from the non-skin surface side; and a recess forming step of forming a recess at a position corresponding to the compressed part on the skin surface side of the absorbent body (6) by pressing the absorbent body (6).

Description

Method for manufacturing absorbent article and absorbent article

Technical Field

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

Background

It is known that: in an absorbent article that absorbs a liquid such as urine or a body fluid, an absorber is squeezed (japanese: squeezing) (for example, japanese patent laid-open publication No. 2019-.

Disclosure of Invention

It is known that: in an absorbent article, a squeezing groove is provided by squeezing an absorbent body, and liquid is diffused into the entire absorbent body through the squeezing groove. However, the portion of the absorbent body after being pressed becomes hard, and the wearing feeling of the absorbent article is lowered due to the direct or indirect contact of the portion with the skin.

In view of the foregoing background, the present application discloses novel absorbent articles.

In order to solve the above problem, in the present invention, the absorbent body is pressed from the non-skin surface side.

In detail, the invention according to claim 1 relates to a method for manufacturing an absorbent article including an absorbent body that absorbs liquid discharged by a wearer. The manufacturing method comprises the following steps: a pressing step of pressing the absorbent body from a non-skin surface side to form a pressed portion; and a recess forming step of forming a recess at a position corresponding to the pressing portion on the skin surface side of the absorbent body by pressing the absorbent body.

The method of manufacturing an absorbent article according to the above aspect may further include a skin side sheet sticking step of sticking a skin side sheet to the skin surface side of the absorbent body in a stretched state after the recess forming step.

The method of manufacturing an absorbent article according to the above aspect may further include a skin side sheet sticking step of sticking the skin side sheet to the skin surface side of the absorbent body in a stretched state before the recess forming step.

In the method of manufacturing an absorbent article according to the above aspect, at least a part of the surface of the concave portion and the skin surface side sheet may be free from adhesion.

In the method of manufacturing an absorbent article according to the above aspect, at least a part of the surface of the concave portion may be bonded to the skin surface side sheet.

In the method of manufacturing an absorbent article according to the above aspect, the pressing portion may be formed in a groove shape in the pressing step, and the concave portion may be formed in a groove shape in the concave portion forming step.

The method of manufacturing an absorbent article according to the above aspect may further include a non-skin surface side sheet attaching step of attaching the non-skin surface side sheet to the non-skin surface side of the absorbent body and not attaching at least a part of the surface of the compressed portion to the non-skin surface side sheet.

In the method for manufacturing an absorbent article according to the above aspect, the absorbent body may have an absorbent core, and the method may further include a hole forming step of forming a through hole that penetrates the absorbent core from the skin surface side to the non-skin surface side.

The invention according to claim 2 relates to a method for manufacturing an absorbent article including an absorbent body that absorbs liquid discharged by a wearer. The manufacturing method comprises the following steps: a concave-convex forming step of forming a concave portion by partially recessing the non-skin surface side of the absorbent body and forming a convex portion by partially protruding the skin surface side of the absorbent body; and a skin surface side sheet sticking step of sticking a skin surface side sheet to the skin surface side of the absorber.

In addition, the present invention can be understood from the aspect of an absorbent article. For example, the 3 rd aspect of the present invention relates to an absorbent article including an absorbent body that absorbs liquid discharged by a wearer. The absorbent article may include: a pressing portion formed on the non-skin surface side of the absorber; and a recess formed at a position corresponding to the squeezing portion on the skin surface side of the absorber.

The 4 th aspect of the present invention relates to an absorbent article including an absorbent body that absorbs liquid discharged by a wearer. The absorbent article may include: a recess which is formed by partially recessing the non-skin surface side of the absorber; a convex portion formed by partially projecting the skin surface side of the absorber; and a skin surface side sheet attached to the skin surface side of the absorber along the protruding portion.

According to the above-described aspects 1 to 4, a novel absorbent article can be provided.

Drawings

The features, advantages and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals represent like elements, and in which:

fig. 1 is a perspective view of a diaper of embodiment 1.

Fig. 2 is an exploded perspective view of the diaper of embodiment 1.

Fig. 3 is a plan view of the extended diaper of embodiment 1 as viewed from the skin surface side.

Fig. 4 is a cross-sectional view of the diaper of embodiment 1 taken along the width direction.

Fig. 5 is a flowchart relating to the method for manufacturing the diaper according to embodiment 1.

Fig. 6 is a diagram showing a manufacturing apparatus used in the method of manufacturing a diaper according to embodiment 1.

Fig. 7 is a perspective view of a squeezing portion forming device of the manufacturing device used in the method for manufacturing a diaper according to embodiment 1.

Fig. 8 is a flowchart relating to a method for manufacturing the diaper according to modification 1-1 of embodiment 1.

Fig. 9 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper according to variation 1-1 of embodiment 1.

Fig. 10 is a cross-sectional view of the diaper of modification 1-1 of embodiment 1 taken along the width direction.

Fig. 11 is a plan view of the absorber as viewed from the skin surface side.

Fig. 12 is a plan view of the absorbent body as viewed from the skin surface side.

Fig. 13 is a flowchart relating to a method for manufacturing the diaper according to modification 1 to 4 of embodiment 1.

Fig. 14 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper according to modification 1 to 4 of embodiment 1.

Fig. 15 is a plan view of the extended diaper of embodiment 2 as viewed from the skin surface side.

Fig. 16 is a cross-sectional view of the diaper of embodiment 2 taken along the width direction.

Fig. 17 is a flowchart relating to a method of manufacturing a diaper according to embodiment 2.

Fig. 18 is a cross-sectional view of the diaper of embodiment 3 taken along the width direction.

Fig. 19 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of embodiment 3.

Fig. 20 is a plan view of the absorbent body as viewed from the skin surface side.

Fig. 21 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of embodiment 3.

Fig. 22 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of modification 3-1 of embodiment 3.

Fig. 23 is a flowchart relating to a method for manufacturing a diaper according to modification 3-2 of embodiment 3.

Fig. 24 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of variation 3-3 of embodiment 3.

Fig. 25 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of modification 3-4 of embodiment 3.

Fig. 26 is a plan view of the extended diaper of embodiment 4 as viewed from the skin surface side.

Fig. 27 is a cross-sectional view of the diaper of embodiment 4 taken along the width direction.

Fig. 28 is a perspective view of a squeezing portion forming device of the manufacturing device used in the method for manufacturing a diaper according to embodiment 4.

Fig. 29 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of embodiment 5.

Fig. 30 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of embodiment 5.

Fig. 31 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of modification 5-1 of embodiment 5.

FIG. 32 is an enlarged cross-sectional view of the vicinity of the concave portion of the diaper according to variation 5-1 of embodiment 5.

Fig. 33 is an enlarged cross-sectional view of the vicinity of the recess in the diaper of embodiment 6.

Fig. 34 is a flowchart relating to a method for manufacturing a diaper according to embodiment 6.

Fig. 35 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper of embodiment 6.

Fig. 36 is a flowchart relating to a method for manufacturing a diaper according to modification 6-1 of embodiment 6.

Fig. 37 is a plan view of the absorber as viewed from the skin surface side.

Fig. 38 is a flowchart relating to a method for manufacturing a diaper according to embodiment 7.

Fig. 39 is a plan view of the extended diaper of embodiment 8, as viewed from the skin surface side.

Fig. 40 is a cross-sectional view of the diaper of embodiment 8 taken along the width direction.

Fig. 41 is an enlarged cross-sectional view of the diaper of embodiment 8 in the vicinity of the concave and convex portions.

Fig. 42 is a flowchart relating to a method of manufacturing a diaper according to embodiment 8.

Fig. 43 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper according to embodiment 8.

Fig. 44 is a cross-sectional view of a pressing device of a manufacturing apparatus used in the method of manufacturing a diaper of embodiment 8, cut in the direction of the rotation axis.

Fig. 45 is an enlarged cross-sectional view of the diaper of modification 8-1 of embodiment 8 showing the vicinity of the concave portions and the convex portions.

Fig. 46 is a flowchart relating to a method for manufacturing a diaper according to modification 8-1 of embodiment 8.

Fig. 47 is a view showing a manufacturing apparatus used in the method for manufacturing a diaper of modification 8-1 of embodiment 8.

Fig. 48 is a flowchart relating to a method for manufacturing a diaper according to modification 8-2 of embodiment 8.

Fig. 49 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper according to variation 8-2 of embodiment 8.

Fig. 50 is a plan view of the extended diaper of embodiment 9 as viewed from the skin surface side.

Fig. 51 is a cross-sectional view of the diaper of embodiment 9 taken along the width direction.

Fig. 52 is an enlarged cross-sectional view of the diaper of embodiment 9 showing the concave and convex portions.

Fig. 53 is a cross-sectional view of a pressing device of a manufacturing apparatus used in the method of manufacturing a diaper of embodiment 9, cut in the direction of the rotation axis.

Fig. 54 is a plan view of the extended diaper of embodiment 10 as seen from the skin surface side.

Fig. 55 is a cross-sectional view of the diaper of embodiment 10 taken along the width direction.

Fig. 56 is a flowchart relating to a method for manufacturing a diaper according to embodiment 10.

FIG. 57 is a plan view of the top sheet as viewed from the skin surface side.

Fig. 58 is a diagram showing a manufacturing apparatus used in the method for manufacturing a diaper of embodiment 10.

Fig. 59 is a plan view of the extended diaper of embodiment 11 as viewed from the skin surface side.

Fig. 60 is a cross-sectional view of the diaper of embodiment 11 taken along the width direction.

Fig. 61 is a plan view of the absorber as viewed from the skin surface side.

Fig. 62 is a plan view of the extended diaper of embodiment 12 as seen from the skin surface side.

Fig. 63 is a cross-sectional view of the diaper of the embodiment taken along the width direction.

Fig. 64 is an enlarged cross-sectional view of the diaper of embodiment 12 in the vicinity of the compressed parts and the recesses.

Fig. 65 is an enlarged cross-sectional view of the diaper of variation 12-1 of embodiment 12, showing the crushed portions and the vicinity of the depressions.

Fig. 66 is a plan view of the absorber as viewed from the skin surface side.

Detailed Description

Hereinafter, an absorbent article according to an embodiment of the present invention will be described with reference to the drawings. The configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

< embodiment 1>

In the present embodiment, a tape-type disposable diaper (which is an example of an "absorbent article" referred to in the present application and hereinafter simply referred to as a "diaper") is configured such that a direction connecting a front body disposed to face an abdomen of a wearer and a rear body disposed to face a back of the wearer is defined as a longitudinal direction. The crotch portion disposed in the crotch of the wearer (disposed opposite to the crotch) is located between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction). In a state where the diaper is worn on a wearer (hereinafter simply referred to as a "worn state"), one side facing the skin of the wearer (the inner side in the worn state) is referred to as a skin surface side, and the opposite side to the skin surface side (the outer side in the worn state) is referred to as a non-skin surface side. The direction connecting the skin surface side and the non-skin surface side is defined as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, the observation from the thickness direction is referred to as planar observation.

Fig. 1 is a perspective view of a diaper of the present embodiment. The diaper 1 has a crotch region 1B corresponding to a crotch covering a wearer's pudendum in a worn state, a front region 1F corresponding to a wearer's front body located on a front side of the crotch region 1B, and a rear region 1R corresponding to a wearer's rear body located on a rear side of the crotch region 1B.

Tapes

2L, 2R that can be attached to the front patch 2F provided on the non-skin surface side of the front body region 1F are provided on the left and right edges of the back body region 1R. When the

tapes

2L and 2R are attached to the front patch 2F in a state where the front body region 1F is disposed on the abdominal side of the wearer and the rear body region 1R is disposed on the back side of the wearer, the diaper 1 is fixed to the body of the wearer in a state of surrounding the abdominal circumference and the thighs of the wearer. Since the diaper 1 is fixed to the body of the wearer in this manner, the wearer can walk while standing with the diaper 1.

An absorbent body capable of absorbing and retaining liquid is disposed in the diaper 1 mainly in the vicinity of the crotch region 1B. In the diaper 1, in order to suppress formation of a gap which becomes an outflow path of liquid between the diaper 1 and the skin of the wearer, the leg gathers 3AL, 3AR are provided at a portion surrounding the leg hole (thigh) of the wearer, the three-dimensional gathers 3BL, 3BR are provided at the inner side in the width direction of the diaper 1 than the leg gathers 3AL, 3AR, and the waist gather 3R is provided at a portion surrounding the abdominal hole of the wearer. The leg gathers 3AL and 3AR, the three-dimensional gathers 3BL and 3BR, and the waist gather 3R are brought into close contact with the skin of the wearer by the elastic force of the elastic member. Thus, the liquid discharged from the pudendal region of the wearer is absorbed by the absorbent body of the diaper 1 without leaking from the diaper 1. Further, as the elastic member, a string-like or belt-like rubber can be appropriately selected.

Fig. 2 is an exploded perspective view of the diaper 1. The diaper 1 has a cover sheet 4 which forms the outer surface in the worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance and provided with the constrictions 4KL and 4KR at positions corresponding to the long sides, and forms the exterior surface of the diaper 1. The narrowing portions 4KL and 4KR are provided at the positions of the thighs of the wearer. The cover sheet 4 is provided for reinforcement of the back sheet 5 described later and improvement of texture, and for example, a liquid impermeable nonwoven fabric made of a thermoplastic resin can be used as a material thereof in order to suppress leakage of excrement. Examples of the thermoplastic resin include Polyethylene (PE), polypropylene (PP), and the like. The cover sheet 4 is not limited to a single-layer structure, and may have a multilayer structure including an inner cover sheet and an outer cover sheet.

The diaper 1 further includes a back sheet 5 (an example of a "non-skin-side sheet" in the present application), an absorbent body 6, and a top sheet 7 (an example of a "skin-side sheet" in the present application) laminated in this order on the wearer-side surface of the cover sheet 4. The back sheet 5, the absorbent body 6, and the top sheet 7 are sheet-like members having a substantially rectangular appearance, and are sequentially stacked on the cover sheet 4 in a state where the longitudinal direction coincides with the longitudinal direction of the cover sheet 4. The back sheet 5 is a sheet made of a liquid impermeable thermoplastic resin material for suppressing leakage of excrement, similarly to the cover sheet 4. The back sheet 5 is preferably made of a material having moisture permeability in order to suppress hot flashes in a wearing state. The top sheet 7 is made of a hot air (air through) nonwoven fabric made of fibers of a thermoplastic resin and arranged on the skin surface side of the wearer so as to cover the water absorption surface of the absorbent body 6. The topsheet 7 has liquid permeability in a part or the whole thereof. Therefore, in a state where the diaper 1 is worn, liquid excreted from the wearer enters the absorber 6 through the top sheet 7 that can contact the skin of the wearer, and is absorbed there. Further, the top sheet 7 may have hydrophilicity. The longitudinal direction of the diaper 1 is the same as the longitudinal direction of the absorbent body 6 and the top sheet 7.

The backsheet 5, the absorbent member 6, and the topsheet 7 extend from the front body region 1F to the back body region 1R. Thus, when the private parts of the wearer are covered with the cover sheet 4 in which the back sheet 5, the absorbent body 6, and the top sheet 7 are laminated, both longitudinal ends of the back sheet 5, the absorbent body 6, and the top sheet 7 are positioned on the ventral side and the dorsal side of the wearer. That is, the pudendal region of the wearer is covered with the absorbent body 6 from the abdomen side to the back side of the wearer. Therefore, regardless of which posture the wearer discharges the liquid to the outside of the body, the wearer has the abdomen facing downward or the back facing downward, the discharged liquid contacts the absorbent body 6 via the top sheet 7.

In the diaper 1, the elastic members 4SL and 4SR for forming the above-described leg gathers 3AL and 3AR are provided between the cover sheet 4 and the back sheet 5 so as to stretch and contract in the longitudinal direction of the diaper 1. The elastic members 4SL and 4SR are provided in an appropriate number (3 in the present embodiment) determined in accordance with the elastic force (contractive force) required for the design of the diaper 1 and the like.

The diaper 1 further includes elongated belt-

like side panels

8L and 8R. The

side sheets

8L and 8R are liquid-impermeable sheets provided on the long side portions of the top sheet 7. In the

side sheets

8L and 8R, similarly to the cover sheet 4, narrowed portions 8KL and 8KR are provided at the portions where the thighs of the wearer are located. In the

side sheets

8L and 8R, elastic members 8EL and 8ER for forming the three-dimensional gathers 3BL and 3BR are arranged along the longitudinal direction. When the diaper 1 is in a worn state, that is, when the diaper 1 is in a U-shape side view, the

side sheets

8L and 8R are pulled up in the longitudinal direction by the contraction force of the elastic members 8EL and 8ER and rise from the top sheet 7, and become the three-dimensional gathers 3BL and 3BR which prevent the liquid from flowing out.

In the cover sheet 4, an elastic member 4C that prevents a gap from being formed between the diaper 1 and the abdominal circumference of the wearer is provided along the longitudinal direction of the diaper 1 on the inner side in the width direction of the diaper 1 than the elastic members 4SL, 4 SR. The elastic member 4C is provided in accordance with an elastic force (contractive force) or the like required in design in the diaper 1.

Further, an elastic member 9ER for forming the waist gather 3R is provided between the backsheet 5 and the top sheet 7 at a position on the back side of the end of the absorbent body 6. The elastic member 9ER is provided between the back sheet 5 and the top sheet 7 in such a manner that the longitudinal direction, which is the extension and contraction direction, is the left-right direction of the diaper 1. Thus, when the

belts

2L, 2R provided on both the left and right sides of the elastic member 9ER are attached to the front patch 2F on the abdominal side of the wearer, the elastic member 9ER exerts a contractive force to bring the diaper 1 into close contact with the wearer, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer.

The absorbent body 6 includes an absorbent core and a core wrap sheet (see fig. 4) wrapping the entire absorbent core. For the core wrap sheet, a paper towel (tissue paper) or a liquid permeable nonwoven fabric is used. The Absorbent core has a structure in which a particulate Absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic Polymer having a crosslinked structure and capable of absorbing and retaining water, is held in the gaps between short fibers of cellulose fibers such as pulp fibers, rayon fibers, and cotton fibers, and short fibers of synthetic fibers such as polyethylene, polypropylene, and polyethylene terephthalate, which have been subjected to hydrophilization treatment. Thus, in the absorbent core, the volume change of the absorbent resin before and after the liquid absorption is basically performed in the short fibers holding the absorbent resin in the gap. Therefore, if the entire absorbent core is viewed from above, the thickness of the absorbent core having absorbed liquid does not have a higher expansion rate than the expansion rate of the absorbent resin itself.

The SAP particles of the present embodiment are obtained by granulating a resin composition containing an SAP. The "resin composition containing an SAP" as used herein is a concept including both a composition composed of only an SAP and a composition containing the SAP as a main component and other substances in the composition to such an extent that the SAP does not adversely affect water absorption properties. Examples of the "other substances" include additives (such as a surface modifier added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during synthesis of the SAP, and the like.

Fig. 3 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 4 is a cross-sectional view of the diaper 1 taken along the line AA of fig. 3 in the width direction. In fig. 3 and 4, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not illustrated.

The diaper 1 of the present embodiment includes the compressed parts 20 and the concave parts 21 formed in a diagonal lattice shape with respect to the rectangular absorbent body 6. The pressing portion 20 is formed by pressing the absorbent body 6 from the non-skin surface side. The concave portion 21 is formed at a position corresponding to the squeezing portion 20 on the skin surface side of the absorbent body 6 by pressurizing the absorbent body 6 after the squeezing portion 20 is formed. The corresponding position here refers to a position overlapping in the thickness direction of the diaper 1. The forming process of the pressing portion 20 and the concave portion 21 will be described later.

In the present embodiment, the squeezing portions 20 and the concave portions 21 are formed in groove shapes extending in an oblique direction in the absorbent body 6. The diaper 1 can spread urine discharged by a wearer over the entire absorbent body 6 along the concave portion 21 provided on the skin surface side of the absorbent body 6. The diaper 1 can also spread urine that has permeated into the non-skin surface side of the absorbent body 6 over the entire absorbent body 6 along the absorbent portion 20. This enables the diaper 1 to efficiently absorb urine discharged from the wearer by the entire absorbent body 6. In the diaper 1, the absorbent body 6 can be easily folded by providing the absorbent body 6 with the compressed parts 20 and the concave parts 21, and therefore, the feeling of fit to the wearer can be improved. In addition, in the diaper 1, the concave portion 21 is provided on the skin surface side of the absorber 6, so that air permeability on the skin surface side can be ensured, and hot flashes in a worn state can be suppressed.

The squeezing portion 20 is formed by squeezing the absorbent body 6. Since the pressed portion becomes hard, if the pressing portion 20 is indirectly brought into contact with the skin of the wearer through the sheet, the feeling of the skin is poor and the wearing feeling is deteriorated. However, in the present embodiment, since the pressing portion 20 is formed on the non-skin surface side, the pressing portion 20 does not indirectly contact the skin of the wearer through the sheet. The concave portion 21 is formed not by pressing but by pressing, and is not harder than the pressing portion 20. Therefore, in the diaper 1, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearer's feeling can be suppressed from being lowered, and the wearer's feeling can be improved.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method of manufacturing the diaper 1 of the present embodiment is characterized by the step of forming the compressed parts 20 and the concave parts 21 in the absorbent body 6, and therefore, these steps will be mainly described hereinafter. Fig. 5 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present embodiment. In the method of manufacturing a diaper according to the present embodiment, first, the absorbent body 6 is pressed from the non-skin surface side to form the compressed part 20 (step S101, an example of the "pressing step" in the present application). Next, the absorbent body 6 is pressurized to form the concave portions 21 at positions corresponding to the squeezing portions 20 on the skin surface side of the absorbent body 6 (step S102, an example of the "concave portion forming step" in the present application). By pressurizing the absorbent body 6, the skin surface side of the absorbent body 6 at the position corresponding to the squeezing portion 20 is depressed toward the non-skin surface side, forming the concave portion 21. Next, the top sheet 7 is stuck to the skin surface side of the absorbent body 6 in a stretched state (step S103, an example of the "skin surface side sheet sticking step" in the present application). In the present embodiment, the top sheet attaching step is performed after the recess portion forming step.

Next, the method for manufacturing the diaper 1 according to the present embodiment will be described in more detail with reference to fig. 6 and 7. Fig. 6 is a diagram showing an example of the apparatus for producing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M1, a nip forming apparatus M2, a pressing apparatus M3, an application apparatus M4, and a top sheet supply roller M5. The conveying line M1 is a conveyor for conveying the absorbent body 6 and the top sheet 7 in a predetermined direction (in the figure, the direction of arrow a 1). In the manufacturing process, the absorbent body 6 and the top sheet 7 are continuous bodies, and the absorbent body 6 and the top sheet 7 corresponding to one diaper are obtained by dividing them one by one.

The press section forming device M2 has an anvil roll M21 and a press roll M22. Fig. 7 is an enlarged perspective view of the squeeze portion forming device M2. The anvil roll M21 is disposed on the side of the absorbent body 6 that is the skin surface side (upper side in the figure), and the squeeze roll M22 is disposed on the side of the absorbent body 6 that is the non-skin surface side (lower side in the figure). The anvil roll M21 and the press roll M22 are disposed opposite to each other with a predetermined gap therebetween. The squeeze roller M22 includes convex portions M22C that squeeze the non-skin surface side of the absorbent body 6. The projections M22C are formed in a diagonal lattice shape with respect to the absorbent body 6 passing therethrough. In fig. 7, the convex portion M22C of the portion blocked by the absorber 6 is also shown by a solid line for the sake of explanation. The anvil roll M21 and the squeeze roll M22 are made of metal such as iron. The pressing section forming device M2 presses the absorbent body 6, which has flowed from the upstream side of the conveyance line M1, from the non-skin surface side by the convex sections M22C by passing between the anvil roller M21 and the press roller M22 (step S101 shown in fig. 5). Thereby, the absorbent body 6 is formed with the compressed part 20.

A pressurizing device M3 is provided downstream of the nip forming device M2 in the conveyance path of the conveyance line M1. The pressing device M3 has a pressing roller M31 and an anvil roller M32. The pressure roller M31 and the anvil roller M32 are disposed opposite to each other with a predetermined gap therebetween. The pressure roller M31 and the anvil roller M32 are made of metal such as iron. The pressing device M3 presses the absorbent body 6, which has flowed from the upstream side of the conveying line M1, by passing the absorbent body 6 between the pressing roller M31 and the anvil roller M32 (step S102 shown in fig. 5). By pressurizing the absorbent body 6, the skin surface side at the position corresponding to the squeezing section 20 is depressed toward the non-skin surface side, forming a concave section 21.

An application device M4 is provided downstream of the pressing device M3 in the conveyance path of the conveyance line M1. The applicator M4 applies the hot-melt adhesive to the skin surface side of the absorbent body 6. The coating device M4 has a plurality of nozzles, and sprays the hot-melt adhesive agent from each nozzle to the absorbent body 6 in a stripe-like or dot-like manner.

A top sheet supply roller M5 is provided downstream of the coating device M4 in the conveyance path of the conveyance line M1. The top sheet supply roller M5 places the top sheet 7 as a continuous body from a long raw material roll (japanese: original reverse ロール) on the absorbent body 6 placed on the conveying line M1. At this time, the top sheet 7 is placed on the absorbent body 6 in a stretched state (step S103 shown in fig. 5).

The method of manufacturing the diaper 1 of the present embodiment forms the compressed parts 20 by compressing the absorbent body 6 from the non-skin surface side, and forms the concave parts 21 at the positions corresponding to the compressed parts 20 on the skin surface side of the absorbent body 6 by compressing the absorbent body 6. The concave portion 21 is not harder than the pressing portion 20 because it is formed not by pressing but by pressing. Therefore, according to the method of manufacturing the diaper 1 of the present embodiment, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearer's feeling can be suppressed from being lowered, and the wearer's feeling can be improved.

In the present embodiment, after the concave portions 21 are formed, the top sheet 7 is stuck to the skin surface side of the absorbent body 6 in a stretched state. This prevents the top sheet 7 from sinking into the concave portion 21, or only slightly sinks the top sheet 7 into the concave portion 21, so that the concave portion 21 does not contact the skin of the wearer through the top sheet 7, thereby improving the wearing feeling.

Further, if the absorbent body 6 is pressed from the skin surface side in a state where the top sheet 7 is attached to the skin surface side of the absorbent body 6, a load is applied to the top sheet 7 and the top sheet may be broken. In the present embodiment, the absorbent body 6 is pressed from the non-skin surface side before the top sheet 7 is attached to the skin surface side of the absorbent body 6, whereby the absorbent body 6 is not pressed including the top sheet 7, and the skin surface side of the core wrap sheet 6B is prevented from being broken by the pressing by pressing the absorbent body 6 from the non-skin surface side. This can prevent SAP contained in the absorbent core 6A from spilling to the skin surface side.

< modification 1-1>

Next, a method for manufacturing the diaper 1 of modification 1-1 of the present embodiment will be described. The manufacturing method of the present modification is characterized in that the top sheet 7 is attached to the skin surface side of the absorbent body 6 before the formation of the concave portions 21. Fig. 8 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, the compressed portion 20 is formed (step S201, an example of the "compressing step" in the present application), the top sheet 7 is then attached to the skin surface side of the absorbent body 6 in a stretched state (step S202, an example of the "skin surface side sheet attaching step" in the present application), and the concave portion 21 is formed (step S203, an example of the "concave portion forming step" in the present application).

Next, a method for manufacturing the diaper 1 of the present modification will be described in more detail with reference to fig. 9. Fig. 9 is a diagram showing an example of an apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M1, a nip forming apparatus M2, a coating apparatus M4, a top sheet supply roller M5, and a pressing apparatus M6. In the present modification, a pressing device M6 is provided on the downstream side of the top sheet supply roller M5 instead of the pressing device M3. The pressing device M6 has a pressing roller M61 and an anvil roller M62. The pressure roller M61 and the anvil roller M62 are disposed opposite to each other with a predetermined gap therebetween. The pressure roller M61 and the anvil roller M62 are made of metal such as iron. The pressing device M6 presses the absorbent body 6 by passing the absorbent body 6 and the top sheet 7, which have flowed from the upstream side of the conveyance line M1, between the pressing roller M61 and the anvil roller M62, thereby forming the concave portions 21 on the skin surface side of the absorbent body 6 (step S203 shown in fig. 8).

As in the method of manufacturing the diaper 1 of the present modification, after the top sheet 7 is attached to the skin surface side of the absorbent body 6, the absorbent body 6 is pressurized to form the concave portions 21 on the skin surface side of the absorbent body 6. Fig. 10 is a cross-sectional view in the width direction of the diaper 1 similar to fig. 4. As shown in fig. 10, according to the method of manufacturing the diaper 1 of the present modification, the top sheet 7 can be made to sink into the concave portion 21, and the concave portion 21 can be made to function as a flow path or an air passage formed on the skin surface side of the diaper 1. In addition, the contact area between the skin of the wearer and the top sheet 7 can be reduced, and the skin feel can be improved.

< modification examples 1 and 2>

Next, a method for manufacturing the diaper 1 of modification 1-2 of the present embodiment will be described. The manufacturing method of the present modification example does not adhere a part of the surface of the concave portion 21 to the top sheet 7. Fig. 11 is a plan view showing the absorbent body 6 coated with the hot-melt adhesive 30 as viewed from the skin surface side. By applying the hot melt adhesive 30 in a stripe shape in this way, the hot melt adhesive 30 can be applied only to a part of the recessed portion 21, and a part not applied with the hot melt adhesive can be provided on the surface of the recessed portion 21. After the hot-melt adhesive 30 is applied, even when the top sheet 7 is stuck to the skin surface side of the absorber 6 and a part of the top sheet 7 is sunk into the concave portion 21, the part of the surface of the concave portion 21 and the top sheet 7 can be prevented from being stuck to each other. According to this modification, since part of the surface of the concave portion 21 and the top sheet 7 are not bonded to each other, the rigidity of the concave portion 21 can be made less likely to be felt when the diaper 1 is worn.

When the entire surface of the concave portions 21 and the top sheet 7 are not bonded to each other, the hot-melt adhesive 30 is applied in a dot shape between the concave portions 21. Fig. 12 is a plan view of the absorbent body 6 coated with the hot-melt adhesive 30 as viewed from the skin surface side. By applying the hot-melt adhesive 30 in a dot shape in this way, the hot-melt adhesive can be applied to the entire area of the recess 21. In order to prevent the entire surface of the concave portion 21 from adhering to the top sheet 7, the entire surface of the concave portion 21 can be prevented from adhering to the top sheet 7 by applying a hot-melt adhesive as shown in fig. 12. According to this modification, since the entire surface of the concave portion 21 and the top sheet 7 are not bonded to each other, the rigidity of the concave portion 21 can be made less likely to be felt in a worn state of the diaper 1.

< modifications 1 to 3>

Next, a method for manufacturing the diaper 1 of the modified examples 1 to 3 of the present embodiment will be described. In the manufacturing method of the present modification, at least a part of the surface of the concave portion 21 is bonded to the top sheet 7. In this case as well, the hot melt adhesive 30 is applied in a stripe shape as shown in fig. 11, whereby the hot melt adhesive is applied to only a part of the concave portion 21, and then the top sheet 7 is attached to the skin surface side of the absorbent body 6 by press working so that a part of the top sheet 7 is recessed into the concave portion 21, whereby a part of the surface of the concave portion 21 and the top sheet 7 can be bonded. Further, by applying a hot-melt adhesive to the entire recessed portion 21, the entire surface of the recessed portion 21 can be bonded to the top sheet 7. According to this modification, the concave portion 21 can be clearly formed up to the skin surface side of the diaper 1 by bonding at least a part of the surface of the concave portion 21 to the top sheet 7.

< modifications 1 to 4>

Next, a method for manufacturing the diaper 1 of the modification 1 to 4 of the present embodiment will be described. Fig. 13 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, after the top sheet 7 is attached to the skin surface side of the absorbent body 6 in a stretched state (after step S103), the back sheet 5 is attached to the non-skin surface side of the absorbent body 6 (step S104, an example of the "non-skin surface side sheet attaching step" in the present application). In step S104, at least a part of the surface of the presser section 20 and the backsheet 5 are not bonded. Thus, a gap is formed between the squeezing portion 20 and the back sheet 5, and therefore the squeezing portion 20 can function as a flow path for diffusing urine. This makes it easier for the diaper 1 to spread urine on the non-skin surface side of the absorbent body 6, and allows more urine to be absorbed and retained on the non-skin surface side of the absorbent body 6. Therefore, the diaper 1 can maintain the shape of the concave portion 21 formed on the skin surface side of the absorbent body 6 even after urine absorption, and can ensure air permeability through the concave portion 21. Further, by covering the non-skin surface side, which is the side to be pressed of the absorbent body 6, with the back sheet 5, the SAP can be suppressed from spilling to the outside of the diaper 1 even if the non-skin surface side of the core wrap sheet 6B is broken.

Next, a method for manufacturing the diaper 1 of the present modification will be described in more detail with reference to fig. 14. Fig. 14 is a diagram showing an example of an apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M1, a coating apparatus M7, and a back sheet supply roll M8. The conveying line M1 is a conveyor for conveying the backsheet 5, the absorbent body 6, and the top sheet 7 in a predetermined direction (in the figure, the direction of arrow a 1). In the manufacturing process, the backsheet 5, the absorbent body 6, and the top sheet 7 are continuous bodies, and the backsheet 5, the absorbent body 6, and the top sheet 7 corresponding to one diaper are obtained by dividing one of them. The top sheet 7 is already attached to the absorbent body 6, and the absorbent body 6 and the top sheet 7 are conveyed so that the absorbent body 6 is on the upper side.

The applicator M7 has a plurality of nozzles that discharge the hot-melt adhesive, and applies the hot-melt adhesive to the absorbent body 6. When a part of the surface of the presser section 20 and the back sheet 5 are not bonded to each other, a hot melt adhesive is applied in a stripe shape as in fig. 11. In the case where the entire surface of the presser 20 is not bonded to the backsheet 5, a hot-melt adhesive is applied in a dot-like manner between the presser 20, as in fig. 12. A backsheet supply roller M8 is provided downstream of the coating device M7 in the conveyance path of the conveyance line M1. The backsheet supply roller M8 places the backsheet 5 as a continuous body from a long material roll on the absorbent body 6 placed on the transport line M1. At this time, the backsheet 5 is placed on the absorbent body 6 in a stretched state (step S104 shown in fig. 13). By not adhering at least a part of the surface of the pressing part 20 to the back sheet 5 as in the present modification, a gap can be formed between the pressing part 20 and the back sheet 5.

< embodiment 2>

Next, the diaper 1 of embodiment 2 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and description thereof is omitted. Fig. 15 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 16 is a cross-sectional view of the diaper 1 taken along the line BB in fig. 15 in the width direction. In fig. 15 and 16, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not shown.

The diaper 1 of the present embodiment has a through hole 22 extending from the skin surface side to the non-skin surface side in the absorbent core 6A. The through-hole 22 is formed in the front body region 1F side of the crotch region 1B at the widthwise center portion of the absorbent member 6. This position is a position where the urethral opening of the wearer is disposed in the worn state of the diaper 1. As shown in fig. 16, the through-hole 22 is formed by penetrating the absorbent core 6A from the skin surface side to the non-skin surface side. The diaper 1 of the present embodiment moves urine to the non-skin surface side of the absorbent body 6 through the through-holes 22. In the diaper 1 of the present embodiment, as in the modifications 1 to 4 of the embodiment 1, when the surface of the presser portion 20 and at least a part of the backsheet 5 are not bonded to each other and a gap is formed between the presser portion 20 and the backsheet 5, urine is moved to the non-skin surface side of the absorbent body 6 by the through-hole 22, and a larger amount of urine can be diffused to the non-skin surface side of the absorbent body 6 by the presser portion 20. The diaper 1 can easily spread urine on the non-skin surface side of the absorbent body 6, and can absorb and hold more urine on the non-skin surface side of the absorbent body 6. Therefore, the diaper 1 can maintain the shape of the concave portion 21 formed on the skin surface side of the absorbent body 6 even after urine absorption, and can ensure air permeability through the concave portion 21.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The manufacturing method of the present embodiment has a hole forming step of forming the through holes 22 in the absorbent body 6. Fig. 17 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present embodiment. In the manufacturing method of the present embodiment, the through-holes 22 are formed in the absorbent core 6A of the absorbent body 6 by a punching device (step S301, an example of the "hole forming step" in the present application). Next, steps S302 to S305 are the same as steps S101 to S104 in embodiment 1. In the present embodiment, the through-hole 22 may be formed so as to penetrate the core wrap sheet 6B.

< other modifications of

embodiments

1 and 2>

In the above embodiment, the pressing portions 20 and the concave portions 21 are formed in a lattice shape, but the present invention is not limited thereto, and may be formed in a dot shape or a stripe shape. In the diaper 1, the concave portion 21 is provided on the skin surface side of the absorber 6, so that the area in contact with the skin of the wearer can be reduced, and the wearing feeling can be improved.

In the above embodiment, the top sheet 7 may be made of 2 sheets of nonwoven fabric, and the lower sheet may be an example of a skin-side sheet. The absorbent body 6 may have a structure without the core wrap sheet 6B.

< embodiment 3>

Next, the diaper 1 of embodiment 3 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

Fig. 18 is a cross-sectional view in the width direction of the diaper 1 similar to fig. 4. The diaper 1 of the present embodiment includes the compressed parts 20 (an example of the "2 nd concave parts" in the present application) and the concave parts 21 (an example of the "1 st concave parts" in the present application) formed in a diagonal lattice shape with respect to the rectangular absorbent body 6. The pressing portion 20 is formed by pressing the absorbent body 6 from the non-skin surface side. The concave portion 21 is formed at a position corresponding to the squeezing portion 20 on the skin surface side of the absorbent body 6 by pressurizing the absorbent body 6 after the squeezing portion 20 is formed.

In the present embodiment, the squeezing portions 20 and the concave portions 21 are formed in groove shapes extending in an oblique direction in the absorbent body 6. The diaper 1 can spread urine discharged by a wearer over the entire absorbent body 6 along the concave portion 21 provided on the skin surface side of the absorbent body 6. Further, the diaper 1 can spread the urine permeated into the non-skin surface side of the absorbent body 6 to the entire absorbent body 6 along the absorbent part 20. This allows the diaper 1 to efficiently absorb urine discharged from the wearer by the entire absorbent body 6. In addition, in the diaper 1, since the absorbent body 6 can be easily folded by providing the compressed portions 20 and the concave portions 21 in the absorbent body 6, the fitting feeling to the wearer can be improved. Further, in the diaper 1, the recess 21 is provided on the skin surface side of the absorber 6, so that air permeability on the skin surface side can be ensured, and hot flashes in the worn state can be suppressed.

In the present embodiment, the top sheet 7 attached to the skin surface side of the absorbent body 6 is not attached to at least a part of the surface of the concave portion 21. Fig. 19 is an enlarged view of the vicinity of the recess 21 in fig. 18. In the example shown in fig. 19, the top sheet 7 is not bonded to the entire surface of the concave portion 21, but is bonded to the surface of the absorbent body 6 outside the concave portion 21 by the hot melt adhesive 30.

In the present embodiment, as shown in fig. 11 of embodiment 1, the hot melt adhesive 30 is applied in a stripe form, so that a portion bonded to the top sheet 7 and a portion not bonded to the top sheet 7 can be formed on the surface of the concave portion 21. Therefore, even if the top sheet 7 is stuck to the skin surface side of the absorber 6 after the hot melt adhesive 30 is applied and a part of the top sheet 7 is depressed into the concave portion 21 by pressing, the top sheet 7 and a part of the surface of the concave portion 21 can be prevented from being adhered.

In the case where the entire surface of the top sheet 7 and the recessed portions 21 are not bonded, the hot melt adhesive 30 is applied in a dot shape between the recessed portions 21. Fig. 20 is a plan view of the absorbent body 6 coated with the hot-melt adhesive 30 as viewed from the skin surface side. By applying the hot melt adhesive 30 in a dot shape in this way, the hot melt adhesive can be prevented from being applied to the entire area of the concave portion 21. In this way, the hot melt adhesive may be applied in a dot-like manner as shown in fig. 20 so as not to adhere the top sheet 7 to the entire surface of the concave portion 21. According to the diaper 1 of the present embodiment, since the top sheet 7 is not bonded to at least a part of the surface of the concave portion 21, the concave portion 21 can be made hard when the diaper 1 is worn.

Next, the absorbent body 6 in which the wearer urinates 1 or more times in the diaper 1 in which the top sheet 7 and at least a part of the surface of the concave portion 21 are not bonded will be described. Fig. 21 is an enlarged view of the vicinity of the concave portion 21 of the absorbent body 6 that has absorbed urine. The absorbent core 6A absorbs urine to swell, and the concave portion 21 deforms. In fig. 21, the deformation of the pressing portion 20 is not illustrated. The top sheet 7 is depressed into the concave portion 21 by being pressed, and the depressed portion is elongated by being pressed, so that the surface area is enlarged. Therefore, the portion of the top sheet 7 that sinks into the concave portion 21 is raised toward the skin surface side by the deformation of the concave portion 21, and this portion is in a state of being shaken. Since the top sheet 7 has a margin in the portion of the sloshing, the absorbent core 6A below the portion can further expand toward the skin surface side. Thus, the expanded portion and the other portions of the absorbent body 6 form fine irregularities in a lattice shape. The expanded portion is a portion where the top sheet 7 is not bonded to the surface of the concave portion 21. The diaper 1 can form a space with the skin by the minute irregularities, and can ensure air permeability between the skin and the absorbent article even after urine absorption by the absorbent body 6.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method for manufacturing the diaper 1 of the present embodiment can be applied to the method for manufacturing the diaper described in the modification 1-1 of the above-described embodiment 1 (see fig. 8 and 9). In the method of manufacturing a diaper according to the present embodiment, as shown in the flowchart of fig. 8, the absorbent body 6 is pressed from the non-skin surface side, thereby forming the compressed portion 20 (step S201). Next, the top sheet 7 is stuck to the skin surface side of the absorber 6 in a stretched state (step S202). Next, the absorbent body 6 is pressurized, whereby the concave portions 21 are formed at positions corresponding to the squeezing portions 20 on the skin surface side of the absorbent body 6 (step S203). By pressurizing the absorbent body 6, the skin surface side of the absorbent body 6 at the position corresponding to the squeezing portion 20 is depressed toward the non-skin surface side, forming the concave portion 21. At this time, the top sheet 7 sinks into the concave portion 21. In the method for manufacturing the diaper 1 of the present embodiment, the manufacturing apparatus M shown in fig. 9 can be used.

In the method of manufacturing the diaper 1 of the present embodiment, after the top sheet 7 is attached to the skin surface side of the absorbent body 6, the absorbent body 6 is pressed to form the concave portions 21 on the skin surface side of the absorbent body 6. This allows the top sheet 7 to be recessed into the concave portion 21, and the concave portion 21 can function as a flow path or an air passage formed on the skin surface side of the diaper 1. In addition, the contact area between the skin of the wearer and the top sheet 7 can be reduced, and the skin feel can be improved.

The method of manufacturing the diaper 1 of the present embodiment forms the compressed parts 20 by compressing the absorbent body 6 from the non-skin surface side, and forms the concave parts 21 at the positions corresponding to the compressed parts 20 on the skin surface side of the absorbent body 6 by compressing the absorbent body 6. The concave portion 21 is not formed by pressing but by pressing, and is not harder than the pressing portion 20. Therefore, according to the method of manufacturing the diaper 1 of the present embodiment, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearing sensation can be suppressed from being lowered, and the wearing sensation can be improved.

< modification 3-1>

Next, the diaper 1 of modification 3-1 of the present embodiment will be described. Fig. 22 is an enlarged cross-sectional view of the absorbent body 6 in the vicinity of the concave portion 21, as in fig. 18. In the diaper 1 of the present modification example, the SAP31 contained in the absorbent body 6 is disposed at a higher density on the skin surface side of the absorbent body 6 than on the non-skin surface side. The SAP31 is contained in the absorbent core 6A and is disposed at a high density on the skin surface side. When the density of the SAP31 in the thickness direction is biased toward the skin surface side, the absorbent body 6 is likely to swell toward the skin surface side during urine absorption, and as shown in fig. 21, is likely to have a convex shape toward the skin surface side. Further, the SAP31 may be disposed so that the SAP overlaps with the concave portion 21 when the absorbent body 6 is viewed in plan in the range of 1 in the thickness direction from the skin surface side.

Further, SAP31 turns into a gel-like state after absorbing urine, and the liquid permeability is reduced. Therefore, in the diaper 1, by disposing the SAP31 on the skin surface side of the absorber 6, the reverse flow of the temporarily absorbed urine returning to the skin surface side can be suppressed. In addition, even if SAP31 is disposed at a high density on the skin surface side of diaper 1 and concave portions 21 are formed on the skin surface side of absorbent body 6, the area of absorbent body 6 that contacts the skin of the wearer through top sheet 7 can be reduced, and the skin of the wearer can be prevented from feeling hard as SAP. Thus, the diaper 1 can improve the wearing feeling.

< modification 3-2>

Next, the diaper 1 of modification 3-2 of the present embodiment will be described. Fig. 23 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, after the concave portion 21 is formed on the skin surface side of the absorbent body 6 (after step S203), the backsheet 5 is attached to the non-skin surface side of the absorbent body 6 (step S204).

In the method of manufacturing the diaper 1 of the present modification, the manufacturing apparatus M shown in fig. 14 can be used. The coating device M7 shown in fig. 14 has a plurality of nozzles for ejecting the hot melt adhesive, and coats the hot melt adhesive in a stripe-like or dot-like manner. A backsheet supply roller M8 is provided on the downstream side of the coating device M7 in the conveyance path of the conveyance line M1. The backsheet supply roller M8 places the backsheet 5 as a continuous body from a long material roll on the absorbent body 6 placed on the transport line M1. At this time, the back sheet 5 is placed on the absorbent body 6 in a stretched state (step S204 shown in fig. 23). In the diaper 1, the non-skin surface side of the absorbent body 6, which is the side to be pressed, is covered with the back sheet 5, so that the SAP can be prevented from spilling to the outside of the diaper 1 even if the non-skin surface side of the core wrap sheet 6B is broken. In the present modification, the back sheet 5 is attached to the absorbent body 6 (step S204) after the concave portions 21 are formed (after step S203), but the present invention is not limited to this, and the concave portions 21 may be formed after the back sheet 5 is attached to the absorbent body 6. In this case, the backsheet 5 is attached to the absorbent body 6 after the compressed portion 20 is formed in the absorbent body 6. By attaching the back sheet 5 to the absorbent body 6 after pressing the absorbent body 6, the back sheet 5 can be prevented from being broken by the pressing, and even if the core wrap sheet 6B is broken by the pressing, SAP can be prevented from spilling from the non-skin surface side by the back sheet 5.

< modification 3-3>

Next, the diaper 1 according to modification 3-3 of the present embodiment will be described. Fig. 24 is an enlarged view of the vicinity of the recess 21 in fig. 4, as in fig. 18. In the present modification, the core wrap sheet 6B is an example of a skin surface side sheet. In this case, the absorbent body 6 is constituted by the absorbent core 6A, and the core wrap sheet 6B can be regarded as a member separate from the absorbent body 6. In the diaper 1 of the present modification, the core wrap sheet 6B is provided so that at least a portion thereof is not adhered to the surface of the concave portion 21, and the portion of the concave portion 21 of the absorbent body 6 protrudes toward the skin surface side after urine absorption, thereby ensuring air permeability.

< modifications 3 to 4>

Next, the diaper 1 of modification 3 to 4 of the present embodiment will be described. Fig. 25 is an enlarged view of the vicinity of the recess 21 in fig. 4, as in fig. 18. In the present modification, the top sheet 7 has a1 st sheet 7A disposed on the skin surface side and a2 nd sheet 7B disposed on the non-skin surface side of the 1 st sheet 7A. The 1 st panel 7A is an example of a skin surface side panel. In the diaper 1 of the present modification, by providing the 2 nd sheet 7B, at least a part of which is not adhered to the surface of the concave portion 21, the portion of the concave portion 21 of the absorbent body 6 is projected toward the skin surface side after urine absorption, and thereby air permeability can be ensured.

< embodiment 4>

Next, the diaper 1 of embodiment 4 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and description thereof is omitted. Fig. 26 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 27 is a cross-sectional view of diaper 1 taken along line CC of fig. 26. In fig. 26 and 27, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not illustrated.

In the diaper 1 of the present embodiment, the absorbent body 6 is pressed from the skin surface side, the compressed part 23 (an example of "1 st concave part" in the present application) is formed on the skin surface side of the absorbent body 6, and the concave part 24 (an example of "2 nd concave part" in the present application) is formed on the non-skin surface side of the absorbent body 6. In this way, the skin surface side of the absorbent body 6 can be pressed. In the diaper 1 of the present embodiment, the top sheet 7 is not bonded to at least a part of the surface of the compressed portion 23, so that the compressed portion 23 is less likely to be hard when the diaper 1 is worn, and the wearing comfort can be improved.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method of manufacturing the diaper 1 of the present embodiment is substantially the same as the method of manufacturing described in the modification 1-1 of the above-described embodiment 1 (see fig. 8 and 9), except that the skin surface side of the absorbent body 6 is squeezed. For example, a squeeze section forming device M9 shown in fig. 28 is provided instead of the squeeze section forming device M2 of the manufacturing device M shown in fig. 7. Fig. 28 is an enlarged perspective view of the pushed portion forming device M9. The press section forming device M9 has a press roller M91 and an anvil roller M92. The squeeze roll M91 is disposed on the side of the absorbent body 6 that is the skin surface side (upper side in the figure), and the anvil roll M92 is disposed on the side of the absorbent body 6 that is the non-skin surface side (lower side in the figure). The squeeze roll M91 and the anvil roll M92 are disposed opposite to each other with a predetermined gap therebetween. The squeeze roller M91 includes a convex portion M91C that squeezes the skin surface side of the absorbent body 6. The projections M91C are formed in a diagonal lattice shape with respect to the passing absorber 6. The squeeze roll M91 and the anvil roll M92 are made of metal such as iron. The pressing section forming device M9 presses the absorbent body 6, which has flowed from the upstream side of the conveying line M1, from the skin surface side by the convex sections M91C by passing between the pressing roller M91 and the anvil roller M92 (step S201 shown in fig. 8). This forms the squeezing portion 23 in the absorbent body 6. Next, as in embodiment 1, a top sheet sticking step is performed (step S202 shown in fig. 8), and then the absorbent body 6 is pressurized to form the concave portions 24 (as in step S203 shown in fig. 8).

In the diaper 1 of the present embodiment, similarly to the diaper 1 of the above embodiment, the air permeability can be ensured by the presser 23 before urine absorption. In the diaper 1, the part of the absorbent body 6 at the compressed part 23 protrudes toward the skin surface side after urine absorption, and thus air permeability can be ensured.

< other modifications of embodiments 3 and 4>

Next, another modification of embodiments 3 and 4 will be described. In the above embodiment, the

pressing portions

20 and 23 and the

concave portions

21 and 24 are formed in a lattice shape, but the present invention is not limited thereto, and may be formed in a dot shape or a stripe shape. By providing the concave portion 21 on the skin surface side of the absorber 6, the diaper 1 can reduce the area in contact with the skin of the wearer, and can improve the wearing feeling. The absorbent body 6 may have a structure without the core wrap sheet 6B.

< embodiment 5>

Next, the diaper 1 of embodiment 5 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and their description is omitted.

In the present embodiment, the top sheet 7 attached to the skin surface side of the absorbent body 6 is bonded to at least a part of the surface of the concave portion 21. Fig. 29 is an enlarged view of the vicinity of the recess 21 in fig. 18. The recess 21 includes a pair of

wall portions

21L and 21R and a bottom portion 21B disposed between the pair of

wall portions

21L and 21R. The pair of

wall portions

21L, 21R and the bottom portion 21B are formed by the surface of the absorbent body 6 (the surface of the core wrap sheet 6B). In the example shown in fig. 29, the top sheet 7 is bonded to the entire surface of the recess 21, that is, the entire pair of

wall portions

21L, 21R and the bottom portion 21B, with a hot melt adhesive 30.

Next, the absorbent body 6 in which the wearer has urinated 1 or more times in the diaper 1 in which the entire surface of the top sheet 7 and the concave portion 21 are bonded will be described. Fig. 30 is an enlarged view of the vicinity of the concave portion 21 of the absorbent body 6 that has absorbed urine. The absorbent core 6A absorbs urine to swell, and the concave portions 21 deform. In fig. 30, the deformation of the pressing portion 20 is not illustrated. The top sheet 7 is depressed into the concave portion 21 by being pressed, and the depressed portion is elongated by being pressed, so that the surface area is enlarged. The portion of the top sheet 7 that is recessed in the concave portion 21 is raised toward the skin surface side by the deformation of the concave portion 21, but the surface of the skin surface side of the bonded portion of the absorbent body 6 on the non-skin surface side of the top sheet 7 is shaken, and thereby a sloshed portion (japanese: だぶつき portion) 7C is formed. The sloshing portion 7C is in a state of having minute irregularities, and thus a plurality of minute spaces are formed between the sloshing portion 7C and the skin. The diaper 1 can ensure air permeability between itself and the skin of the wearer even after urine absorption by the minute space, and improve the wearing feeling.

In this way, the diaper 1 of the present embodiment ensures air permeability by the groove-like recessed portion 21 before urine absorption, and ensures air permeability by forming the sloshing portion 7C in the top sheet 7 on the skin surface side at the position where the recessed portion 21 exists after urine absorption. The diaper 1 can improve the wearing feeling by securing air permeability before and after urine absorption.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method of manufacturing the diaper 1 of the present embodiment can be applied to the method of manufacturing described in modification 1-1 of embodiment 1 (see fig. 8 and 9).

In the method of manufacturing the diaper 1 of the present embodiment, the top sheet 7 is attached to the skin surface side of the absorbent body 6, and then the absorbent body 6 is pressurized to form the concave portion 21 on the skin surface side of the absorbent body 6. Further, this enables the top sheet 7 to be recessed into the recessed portion 21, and the recessed portion 21 to function as a flow path or an air passage formed on the skin surface side of the diaper 1. In addition, the contact area between the skin of the wearer and the top sheet 7 can be reduced, and the skin feel can be improved.

The method of manufacturing the diaper 1 of the present embodiment forms the compressed part 20 by compressing the absorbent body 6 from the non-skin surface side, and forms the concave part 21 at the position corresponding to the compressed part 20 on the skin surface side of the absorbent body 6 by compressing the absorbent body 6. The concave portion 21 is not formed by pressing but by pressing, and is not harder than the pressing portion 20. Therefore, according to the method of manufacturing the diaper 1 of the present embodiment, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearing feeling can be suppressed from being lowered, and the wearing feeling can be improved.

Further, if the absorbent body 6 is pressed from the skin surface side in a state where the top sheet 7 is attached to the skin surface side of the absorbent body 6, a load is applied to the top sheet 7 and the top sheet may be broken. In the present embodiment, the absorbent body 6 is pressed from the non-skin surface side before the top sheet 7 is adhered to the skin surface side of the absorbent body 6, so that the absorbent body 6 is not pressed including the top sheet 7, and the absorbent body 6 is pressed from the non-skin surface side, so that the skin surface side of the core wrap sheet 6B is prevented from being cracked by the pressing. This can prevent SAP contained in the absorbent core 6A from spilling to the skin surface side.

< modification 5-1>

Next, the diaper 1 of modification 5-1 of the present embodiment will be explained. In the diaper 1 of the present modification, the top sheet 7 is bonded to a part of the surface of the recess 21. As shown in fig. 11, by applying the hot melt adhesive 30 in a stripe shape, a portion bonded to the top sheet 7 and a portion not bonded to the top sheet 7 can be formed on the surface of the concave portion 21. Therefore, the top sheet 7 is stuck to the skin surface side of the absorber 6 after the hot melt adhesive 30 is applied, and a part of the top sheet 7 is depressed into the concave portion 21 by pressing, whereby the top sheet 7 can be bonded to a part of the surface of the concave portion 21. In the diaper 1 of the present modification example as well, after the absorption of urine by the absorbent body 6, the portion of the top sheet 7 that sinks into the concave portion 21 is raised toward the skin surface side by the deformation of the concave portion 21, but the portion of the absorbent body 6 that is adhered to the skin surface side swings at the non-skin surface side of the top sheet 7, thereby forming the swing portion 7C. The sloshing portion 7C has minute irregularities, and a plurality of minute spaces are formed between the sloshing portion 7C and the skin. The diaper 1 can ensure air permeability between the diaper and the skin of the wearer even after urine absorption through the minute space, and improve wearing comfort.

In addition, in the region where the hot melt adhesive 30 is applied, the water permeability of the liquid becomes small. Therefore, by providing the area coated with the hot-melt adhesive 30 and the area not coated with the hot-melt adhesive 30 on the surface of the concave portion 21, a portion having high liquid permeability and a portion having low liquid permeability can be provided, urine can be diffused in the portion having low liquid permeability, urine can be permeated into the absorbent body 6 in the portion having high liquid permeability, and balance between permeability and diffusibility of urine can be achieved. Furthermore, the method is simple. The top sheet 7 is bonded in the region where the hot melt adhesive 30 is applied to the surface of the concave portion 21, and the top sheet 7 is not bonded in the region where the hot melt adhesive is not applied to the surface of the concave portion 21.

< modification 5-2>

Next, the diaper 1 of modification 5-2 of the present embodiment will be described. Fig. 31 is an enlarged cross-sectional view of the absorbent body 6 in the vicinity of the concave portion 21, as in fig. 29. Fig. 32 is an enlarged view of the vicinity of the concave portion 21 of the absorbent body 6 which has absorbed urine. In the diaper 1 of the present modification, the top sheet 7 is bonded to a part of the pair of

wall portions

21L, 21R of the recess 21 with the hot melt adhesive 30. When the absorbent body 6 swells after urine absorption, the bottom portion 21B has the same height as the non-recessed portion of the absorbent body 6, and the surface of the top sheet 7 on the skin surface side of the portion bonded to the

wall portions

21L and 21R swings, thereby forming a swinging portion 7C. The sloshing portion 7C has minute irregularities, and a plurality of minute spaces are formed between the sloshing portion 7C and the skin. Further, the absorbent body 6 in the part that is originally the bottom portion 21B is maintained in a slightly concave state, and thereby the concave portion 7D is formed on the skin surface side of the top sheet 7. The diaper 1 can ensure air permeability between itself and the skin of the wearer even after urine absorption by the minute space formed by the sloshing portion 7C and the recess 7D, and can improve wearing comfort.

< modification 5-3>

Next, the diaper 1 of modification 5-3 of the present embodiment will be described. The method of manufacturing the diaper 1 according to this modification can be applied to the method of manufacturing described in modification 3-2 of embodiment 3 (see fig. 23).

In the present embodiment, the skin surface side of the absorbent body 6 may be pressed as in the above-described modification 3-4 (fig. 26 to 28). Even if the skin surface side of the absorbent body 6 is pressed in this way, the diaper 1 can secure air permeability by the minute space formed between the sloshing portion 7C and the skin before urine absorption.

< other modification of embodiment 5>

In the above embodiment, the

pressing portions

20 and 23 and the

concave portions

21 and 24 are formed in a lattice shape, but the present invention is not limited thereto, and may be formed in a dot shape or a stripe shape. In the diaper 1, the concave portion 21 is provided on the skin surface side of the absorber 6, so that the area in contact with the skin of the wearer can be reduced, and the wearing feeling can be improved.

The absorbent body 6 may have a structure without the core wrap sheet 6B. The above-described embodiments and modifications can be combined with each other.

< embodiment 6>

Next, the diaper 1 of embodiment 6 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and their description is omitted.

Fig. 33 is an enlarged view of the vicinity of the pressing portion 20 and the concave portion 21 in fig. 4. The top sheet 7 is not bonded to the entire surface of the concave portion 21, and is bonded to the surface of the absorber 6 outside the concave portion 21 by the hot melt adhesive 30. In the diaper 1 of the present embodiment, the absorbent body 6 has SAP particle groups 32 which are highly absorbent polymers arranged on the non-skin surface side of the absorbent core 6A.

In the diaper 1 of the present embodiment, the SAP particle group 32 is disposed on the non-skin surface side of the absorbent core 6A, so that the fibers on the non-skin surface side of the absorbent core 6A and the SAP particles are entangled with each other to exhibit an anchor effect. When the absorbent core 6A is pressed and compressed, a restoring force is generated against this, but the restoring force of the absorbent core 6A is suppressed by the anchor effect of the SAP. The diaper 1 suppresses the restoring force of the absorbent core 6A by the anchor effect, and thereby the shape of the squeezing portion 20 is easily maintained. Further, the anchoring effect is exerted more largely as the density of the SAP in the absorbent core 6A is higher and the entanglement of the SAP with the absorbent core 6A is stronger.

Further, by disposing the SAP particle group 32 on the non-skin surface side of the absorbent core 6A, the absorbent core 6A mainly absorbs and holds urine on the non-skin surface side, and therefore, the absorbent core 6A swells on the non-skin surface side after urine absorption. Therefore, the absorbent core 6A is less likely to swell on the skin surface side even after urine absorption, and the shape of the concave portion 21 formed on the skin surface side is easily maintained. In this way, the diaper 1 can maintain the shape of the concave portion 21 even after urine absorption to ensure air permeability, thereby improving the wearing feeling.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method of manufacturing the diaper 1 of the present embodiment is characterized by the step of forming the compressed parts 20 and the concave parts 21 in the absorbent body 6, and therefore, these steps will be mainly described later. Fig. 34 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present embodiment. In the method of manufacturing a diaper of the present embodiment, first, particles of SAP are scattered on the non-skin surface side of the absorbent core 6A (step S301, an example of "SAP placement step" in the present application). Next, the absorbent body 6 is pressed from the non-skin surface side to form the compressed part 20 (step S302, an example of the "compressing step" in the present application). Next, the absorbent body 6 is pressurized to form the concave portions 21 at positions corresponding to the squeezing portions 20 on the skin surface side of the absorbent body 6 (step S303, an example of the "concave portion forming step" in the present application). By pressurizing the absorbent body 6, the skin surface side of the absorbent body 6 at the position corresponding to the squeezing portion 20 is depressed toward the non-skin surface side, forming the concave portion 21. Next, the top sheet 7 is stuck to the skin surface side of the absorbent body 6 in a stretched state (step S304, an example of the "skin surface side sheet sticking step" in the present application). In the present embodiment, the top sheet attaching step is performed after the recess forming step.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described in more detail with reference to fig. 35. Fig. 35 is a diagram showing an example of the apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M10, an SAP scattering device M11, a conveyance line M20, a pressing portion forming device M2, a pressing device M3, an application device M4, and a top sheet supply roller M5. The conveying line M10 is a conveyor for conveying the absorbent cores 6A in a predetermined direction (in the figure, the direction of arrow a 1). The conveying line M20 is a conveyor for conveying the absorbent body 6 and the top sheet 7 in a predetermined direction (in the figure, the direction of arrow a 1). In the manufacturing process, the absorbent body 6 and the top sheet 7 are continuous bodies, and the absorbent body 6 and the top sheet 7 are obtained in the amount of one diaper by dividing them one by one.

On the conveying line M10, the absorbent core 6A is conveyed so that the non-skin surface side faces upward. The SAP scattering device M11 scatters particles of the SAP toward the non-skin surface side of the absorbent core 6A (step S301 shown in fig. 34). The absorbent core 6A is wrapped by the core wrap sheet 6B after the particles of the SAP are scattered (not shown). Thereby, the absorbent body 6 was produced. The absorbent body 6 is conveyed to a conveyance line M20 for the next manufacturing process.

In the transport line M20, the absorbent body 6 is transported so that the skin surface side faces upward. The pressing section forming device M2 presses the absorbent body 6, which has flowed from the upstream side of the conveyance line M20, from the non-skin surface side by the convex sections M22C by passing between the anvil roller M21 and the press roller M22 (step S302 shown in fig. 34). Thereby, the absorbent body 6 is formed with the compressed part 20.

A pressurizing device M3 is provided downstream of the squeezing portion forming device M2 in the conveyance path of the conveyance line M20. The pressing device M3 has a pressing roller M31 and an anvil roller M32. The pressure roller M31 and the anvil roller M32 are disposed opposite to each other with a predetermined gap therebetween. The pressure roller M31 and the anvil roller M32 are made of metal such as iron. The pressing device M3 presses the absorbent body 6, which has flowed from the upstream side of the conveying line M20, by passing the absorbent body 6 between the pressing roller M31 and the anvil roller M32 (step S303 shown in fig. 34). The absorbent core 6 is compressed, so that the skin surface side corresponding to the compressed part 20 is depressed toward the non-skin surface side, thereby forming a concave part 21.

A coating device M4 is provided downstream of the pressing device M3 in the conveyance path of the conveyance line M20. The applicator M4 applies the hot-melt adhesive to the skin surface side of the absorbent body 6. The coating device M4 has a plurality of nozzles, and the hot-melt adhesive is sprayed from each nozzle, thereby coating the absorbent body 6 with the hot-melt adhesive in a stripe-like or dot-like manner.

A top sheet supply roller M5 is provided downstream of the coating device M4 in the conveyance path of the conveyance line M20. The top sheet supply roller M5 places the top sheet 7 as a continuous body from a long raw material roll on the absorbent body 6 placed on the conveying line M20. At this time, the top sheet 7 is placed on the absorbent body 6 in a stretched state (step S304 shown in fig. 34).

The method of manufacturing the diaper 1 of the present embodiment forms the compressed parts 20 by compressing the absorbent body 6 from the non-skin surface side, and forms the concave parts 21 at the positions corresponding to the compressed parts 20 on the skin surface side of the absorbent body 6 by compressing the absorbent body 6. The concave portion 21 is not formed by pressing but by pressing, and is not harder than the pressing portion 20. Therefore, according to the method of manufacturing the diaper 1 of the present embodiment, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearing feeling can be suppressed from being lowered, and the wearing feeling can be improved.

In the present embodiment, after the concave portion 21 is formed, the top sheet 7 is stuck to the skin surface side of the absorbent body 6 in a stretched state. This prevents the top sheet 7 from sinking into the concave portion 21, or only slightly sinks the top sheet 7 into the concave portion 21, so that the concave portion 21 does not contact the skin of the wearer through the top sheet 7, thereby improving the wearing feeling.

Further, if the absorbent body 6 is pressed from the skin surface side in a state where the top sheet 7 is attached to the skin surface side of the absorbent body 6, a load is applied to the top sheet 7 and the top sheet may be broken. In the present embodiment, the absorbent body 6 is pressed from the non-skin surface side before the top sheet 7 is attached to the skin surface side of the absorbent body 6, so that the absorbent body 6 is not pressed including the top sheet 7, and the skin surface side of the core wrap sheet 6B is prevented from being cracked by the pressing by pressing the absorbent body 6 from the non-skin surface side. This can prevent SAP contained in the absorbent core 6A from spilling to the skin surface side.

Further, by disposing the SAP particle group 32 on the non-skin surface side of the absorbent core 6A, an anchor effect is exerted, the restoring force of the absorbent core 6A is suppressed, and the shape of the squeezing portion 20 is easily maintained.

< modification 6-1>

Next, a method for manufacturing the diaper 1 of modification 6-1 of the present embodiment will be described. Fig. 36 is a flowchart showing an outline of a method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, after the top sheet 7 is attached to the skin surface side of the absorbent body 6 in a stretched state (after step S304), the back sheet 5 is attached to the non-skin surface side of the absorbent body 6 (step S305, an example of the "non-skin surface side sheet attaching step" in the present application). In step S305, at least a part of the surface of the presser section 20 and the backsheet 5 are not bonded. Thus, a gap is formed between the squeezing portion 20 and the back sheet 5, and therefore the squeezing portion 20 can function as a flow path for diffusing urine. This makes it easier for the diaper 1 to spread urine on the non-skin surface side of the absorbent body 6, and allows more urine to be absorbed and retained on the non-skin surface side of the absorbent body 6. Therefore, the diaper 1 can maintain the shape of the concave portion 21 formed on the skin surface side of the absorbent body 6 even after urine absorption, and can ensure air permeability through the concave portion 21. Further, by covering the non-skin surface side, which is the pressed side of the absorbent body 6, with the back sheet 5, the SAP can be suppressed from spilling to the outside of the diaper 1 even if the non-skin surface side of the core wrap sheet 6B is broken.

Next, the method for manufacturing the diaper 1 of the present modification will be described in more detail. In this modification, the manufacturing apparatus M shown in fig. 14 can be used.

The coating device M7 has a plurality of nozzles that discharge the hot-melt adhesive, and coats the hot-melt adhesive in a stripe-like or dot-like manner on the absorbent body 6. A backsheet supply roller M8 is provided on the downstream side of the coating device M7 in the conveyance path of the conveyance line M30. The backsheet supply roll M8 places the continuous backsheet 5 from the long material roll on the absorbent body 6 placed on the conveyance line M30. At this time, the backsheet 5 is placed on the absorbent body 6 in a stretched state (step S305 shown in fig. 36). By not adhering at least a part of the surface of the presser portion 20 to the back sheet 5 as in this modification, a gap can be formed between the presser portion 20 and the back sheet 5.

Further, urine that has reached the non-skin surface side of the absorbent body 6 spreads toward the entire absorbent body 6 by the squeezing portions 20. Since the SAP is disposed on the non-skin surface side of the absorbent core 6A, the absorbent body 6 holds urine on the non-skin surface side, and thereby the non-skin surface side swells. Therefore, the absorbent core 6A is less likely to swell on the skin surface side even after urine absorption, and the shape of the concave portion 21 formed on the skin surface side is easily maintained.

< modification 6-2>

Next, a method for manufacturing the diaper 1 of modification 6-2 of the present embodiment will be described. Fig. 37 is a plan view of the absorbent body 6 coated with the hot-melt adhesive 30 as viewed from the skin surface side. In the present modification, lattice points 21A where the lattice-shaped concave portions 21 intersect with each other are not bonded to the top sheet 7.

In the method of manufacturing the diaper 1 of the present modification, the hot-melt adhesive 30 is applied in stripes so as to avoid the lattice points 21A as shown in fig. 37 by the applicator M7 shown in fig. 14. Thus, even if the top sheet 7 sinks into the concave portion 21 in the manufacturing process of the diaper 1, the top sheet 7 can be prevented from adhering to the grid points 21A. The lattice points 21A are hard portions in the concave portion 21, and by not adhering the lattice points 21A to the top sheet 7, the lattice points can be made soft to the skin of the wearer, and the wearing feeling can be improved.

< embodiment 7>

Next, the diaper 1 of embodiment 7 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

The diaper 1 of the present embodiment has through holes 22 extending from the skin surface side to the non-skin surface side in the absorbent core 6A, similarly to the diaper 1 of embodiment 2 described above shown in fig. 15 and 16. This makes it easier for the diaper 1 to spread urine on the non-skin surface side of the absorbent body 6, and allows more urine to be absorbed and retained on the non-skin surface side of the absorbent body 6. Therefore, the diaper 1 can maintain the shape of the concave portion 21 formed on the skin surface side of the absorbent body 6 even after urine absorption, and can ensure air permeability through the concave portion 21.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The manufacturing method of the present embodiment includes a hole forming step of forming the through-holes 22 in the absorbent body 6. Fig. 38 is a flowchart showing an outline of the method for manufacturing the diaper 1 of the present embodiment. In the manufacturing method of the present embodiment, first, particles of SAP are scattered on the non-skin surface side of the absorbent core 6A (step S401, an example of "SAP placement step" in the present application). The step 401 is the same as the step S301. Next, the through-holes 22 are formed in the absorbent core 6A of the absorbent body 6 by a perforation device (step S402, an example of the "hole forming step" in the present application). Next, steps S403 to S406 are the same as steps S302 to S305 in embodiment 1. The order of steps S401 and S402 can be changed. The through-hole 22 may be formed so as to penetrate the core wrap sheet 6B.

< other modifications of

embodiments

6 and 7>

In the above embodiment, the top sheet 7 may be formed of 2 sheets of nonwoven fabric, and the lower sheet may be an example of a skin surface side sheet. The absorbent body 6 may have a structure without the core wrap sheet 6B. Further, a group of SAP particles may be arranged on the skin surface side of the absorbent core 6A. In this case, more particles of SAP are arranged on the non-skin surface side than on the skin surface side of the absorbent core 6A. The above-described embodiments and modifications can be combined with each other.

< embodiment 8>

Next, the diaper 1 of embodiment 8 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In an absorbent article, a concave portion formed on the skin surface side of an absorbent body is deformed by the absorbent body absorbing urine and expanding. In the absorbent article, if the concave portion is deformed, the air permeability secured by the concave portion is impaired. Therefore, in the absorbent article, there is a problem that the air permeability is decreased after the absorbent body absorbs urine, and the wearing feeling is decreased. Embodiments 8 to 11 aim to provide a technique that can improve the wearing sensation of an absorbent article.

Fig. 39 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 40 is a cross-sectional view of diaper 1 taken along line DD of fig. 39 in the width direction. In fig. 39 and 40, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not shown.

The diaper 1 of the present embodiment includes recesses 40 and protrusions 41 formed in a diagonal lattice pattern with respect to the rectangular absorber 6. The concave portion 40 is formed on the non-skin surface side of the absorber 6, and is a portion having a concave shape on the skin surface side. The convex portion 41 is formed on the skin surface side of the absorbent body 6 and is a portion that is convex on the skin surface side. The convex portion 41 is formed by projecting a portion corresponding to the concave portion 40 toward the skin surface side when the concave portion 40 is formed. The corresponding position here is a position overlapping in the thickness direction of the diaper 1. The process for forming the concave portion 40 and the convex portion 41 will be described later.

The concave portion 40 is formed in a groove shape extending in an oblique direction in the absorber 6. The diaper 1 can spread urine that has permeated into the non-skin surface side of the absorbent body 6 to the entire absorbent body 6 along the concave portion 40. This enables the diaper 1 to efficiently absorb urine discharged from the wearer by the entire absorbent body 6.

Further, as shown in fig. 40, in the diaper 1, the convex portion 41 is provided on the skin surface side of the absorber 6, so that the top sheet 7 disposed on the skin surface side of the absorber 6 is also lifted by the convex portion 41 and projects toward the skin surface side. Accordingly, in the diaper 1, the contact area between the skin and the top sheet 7 can be reduced, and a gap can be formed between the top sheet 7 contacting the skin of the wearer and the skin, so that air permeability (air and moisture permeability) can be ensured on the skin surface side, and the wearing feeling can be improved.

Further, a top sheet 7 is attached to the skin surface side of the absorber 6 so as to extend along the convex portion 41. The position, shape, and the like of the projection 41 are fixed by the top sheet 7. The top sheet 7 on the convex portion 41 is lifted up toward the skin surface side by the convex portion 41, and is thereby stretched as compared with other portions. Therefore, when the wearer urinates into the diaper 1 and the absorbent body 6 absorbs the urine and swells, the top sheet 7 on the convex portions 41 has a margin over the other portions, and therefore the convex portions 41 protrude further toward the skin surface side than the other portions after the absorption of the urine by the absorbent body 6. This reduces the contact area between the skin and the top sheet 7 even after urine absorption in the diaper 1, ensures air permeability on the skin surface side, suppresses moist heat in the worn state, and improves the wearing feeling.

Further, when the absorbent body is provided with a concave portion formed by pressing the absorbent body on the skin surface side, there are problems as follows: even if the air permeability can be ensured by the concave portion before the absorption of urine by the absorbent body, the concave portion is deformed by the expansion of the SAP after the absorption of urine by the absorbent body, and the air permeability cannot be ensured. However, according to the diaper 1 of the present embodiment, the convex portion 41 is provided on the skin surface side of the absorber 6 to form a gap between the wearer and the top sheet 7, thereby ensuring air permeability. In addition, the diaper 1 can ensure air permeability by maintaining the shape of the convex portion 41 even after urine absorption by the absorbent body 6. This improves the wearing feeling of the diaper 1.

Fig. 41 is an enlarged view of the vicinity of the concave portion 40 and the convex portion 41 of fig. 40. The top sheet 7 is not bonded to the entire surface of the projection 41, and is bonded to the surface of the absorbent body 6 outside the projection 41 with the hot melt adhesive 30. Since the topsheet 7 is not adhered to the projections 41, the projections 41 are more likely to be convex toward the skin surface side after urine absorption in the absorbent body 6.

As shown in fig. 41, the recess 40 has a substantially trapezoidal cross-sectional shape, and includes a bottom portion 40B and a pair of

wall portions

40L and 40R provided on the left and right of the bottom portion 40B. The convex portion 41 has a substantially trapezoidal cross-sectional shape similarly to the concave portion 40, and includes a top portion 41T and a pair of

wall portions

41L and 41R provided on the left and right of the top portion 41T. Here, the concave portion 40 may be formed by pressing at least a part of the absorber 6, and in the present embodiment, the region P between the

wall portions

40L and 40R and the

wall portions

41L and 41R in the absorbent core 6A is pressed. The diaper 1 is pressed by the region P of the absorbent core 6A, and the shape of the convex portion 41 is easily maintained. Further, by making the pressing rate of the top portion 41T of the convex portion 41 on the skin surface side lower than the pressing rate of the region P which is the skin surface side of the

wall portions

41L, 41R, the top portion 41T which indirectly contacts the skin through the top sheet 7 is not made hard, and the reduction of the feeling of wearing can be prevented.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. The method of manufacturing the diaper 1 of the present embodiment is characterized by the step of forming the concave portions 40 and the convex portions 41 in the absorbent body 6, and therefore, these steps will be mainly described later. Fig. 42 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present embodiment. In the method of manufacturing the diaper 1 of the present embodiment, first, the concave portions 40 and the convex portions 41 are formed in the absorber 6 (step S501, an example of the "concave-convex forming step" in the present application). Next, the top sheet 7 is attached to the skin surface side of the absorbent body 6 so as to extend along the convex portion 41 (step S502, an example of the "skin surface side sheet attaching step" in the present application). In the present embodiment, the top sheet attaching step is performed after the irregularity forming step.

Next, the method for manufacturing the diaper 1 according to the present embodiment will be described in more detail with reference to fig. 43 and 44. Fig. 43 is a diagram showing an example of an apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M1, a pressing apparatus M2, a coating apparatus M4, and a top sheet supply roll M5. The conveying line M1 is a conveyor for conveying the absorbent body 6 and the top sheet 7 in a predetermined direction (in the figure, the direction of arrow a 1).

In the transport line M1, the absorbent body 6 is transported so that the skin surface side faces upward. The pressing device M2 has an upper roller M21 and a lower roller M22. Fig. 44 is a sectional view of the pressurizing device M2 cut in the rotation axis direction. The upper roller M21 is disposed on the side of the absorbent body 6 that is the skin surface side (upper side in the figure), and the lower roller M22 is disposed on the side of the absorbent body 6 that is the non-skin surface side (lower side in the figure). The upper roller M21 and the lower roller M22 are disposed to face each other with a predetermined gap therebetween. The lower roller M22 has a cylindrical shape, and protrusions M22C for forming the oblique lattice-shaped recesses 40 in the absorber 6 are provided on the side of the cylindrical shape. The upper roller M21 has a cylindrical shape, and recesses M21D for forming the oblique grid-like protrusions 41 in the absorbent body 6 are provided on the side of the cylindrical shape. By passing the absorber 6 between the upper roller M21 and the lower roller M22, the concave portions 40 and the convex portions 41 are formed in the portion sandwiched between the convex portions M22C and the concave portions M21D. Further, the gap between the upper roller M21 and the lower roller M22 is D1 except for the convex portion M22C and the concave portion M21D, D1 is between the top of the convex portion M22C and the bottom of the concave portion M21D, and D2 is between the side of the convex portion M22C and the side of the concave portion M21D. D1 is substantially the same as the thickness of the natural absorber 6, and D2 is shorter than D1. Thereby, the pressurizing device M2 can press the region P between the

wall portions

40L, 40R of the concave portion 40 and the

wall portions

41L, 41R of the convex portion 41.

An application device M4 is provided downstream of the pressing device M2 in the conveyance path of the conveyance line M1. The applicator M4 applies the hot-melt adhesive to the skin surface side of the absorbent body 6. The coating device M4 has a plurality of nozzles, and the hot-melt adhesive is sprayed from each nozzle, thereby coating the absorbent body 6 with the hot-melt adhesive in a stripe-like or dot-like manner.

A top sheet supply roller M5 is provided downstream of the coating device M4 in the conveyance path of the conveyance line M1. The top sheet supply roller M5 places the top sheet 7 as a continuous body from a long raw material roll onto the absorbent body 6 placed on the conveyance line M1. At this time, the top sheet 7 is placed on the absorbent body 6 in a state of being along the convex portions 41 (step S502 shown in fig. 42).

According to the diaper 1 manufactured by the method for manufacturing the diaper 1 of the present embodiment, the convex portion 41 is provided on the skin surface side of the absorbent body 6 to form a gap between the wearer and the top sheet 7, thereby ensuring air permeability. In addition, the diaper 1 can ensure air permeability by maintaining the shape of the convex portion 41 even after urine absorption by the absorbent body 6. This can improve the wearing feeling of the diaper 1.

< modification 8-1>

Next, the diaper 1 of modification 8-1 of the present embodiment will be described. Fig. 45 is an enlarged view of the vicinity of the concave portion 40 and the convex portion 41, as in fig. 41. In the diaper 1 of the present modification, the SAP particle group 32 is disposed on the non-skin surface side of the absorbent core 6A, and thus the fibers on the non-skin surface side of the absorbent core 6A and the SAP particles are entangled with each other to exhibit an anchor effect. When the absorbent core 6A is squeezed and compressed, a restoring force is generated against this, but the restoring force of the absorbent core 6A is suppressed by the anchor effect of the SAP. The diaper 1 suppresses the restoring force of the absorbent core 6A by the anchor effect, whereby the shape of the concave portion 40 is easily maintained. Further, the anchoring effect is exerted more largely as the density of the SAP in the absorbent core 6A is higher and the entanglement of the SAP with the absorbent core 6A is stronger.

Further, by disposing the SAP particle group 32 on the non-skin surface side of the absorbent core 6A, the absorbent core 6A mainly absorbs and holds urine on the non-skin surface side, and therefore the absorbent core 6A swells on the non-skin surface side after urine absorption. If the skin surface side of the absorbent core 6A is supposed to swell, the absorbent core 6A becomes flat or nearly flat including the convex portions 41 on the skin surface side, but in the present modification, the absorbent core 6A is less likely to swell on the skin surface side even after urine absorption because the SAP particle group 32 is disposed on the non-skin surface side. Therefore, the diaper 1 of the present modification easily maintains the shape of the convex portion 41 formed on the skin surface side. In this way, the diaper 1 can maintain the convex portion 41 even after urine absorption to ensure air permeability, and can improve wearing comfort.

Next, a method of manufacturing the diaper 1 of the present modification will be described. Fig. 46 is a flowchart showing an outline of a method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, first, particles of SAP are scattered onto the non-skin surface side of the absorbent core 6A (step S601, an example of the "SAP placement step" in the present application). The following steps S602 and S603 are the same as steps S501 and S502 shown in fig. 42, and therefore, the description thereof is omitted.

Next, a method for manufacturing the diaper 1 of the present modification will be described in more detail with reference to fig. 47. Fig. 47 is a diagram showing an example of an apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveying line M10, an SAP scattering apparatus M11, a conveying line M1, a pressing apparatus M2, a coating apparatus M4, and a top sheet supply roller M5. The conveying line M10 is a conveyor for conveying the absorbent cores 6A in a predetermined direction (in the figure, the direction of arrow a 1).

On the conveying line M10, the absorbent core 6A is conveyed so that the non-skin surface side faces upward. The SAP scattering device M11 scatters particles of SAP toward the non-skin surface side of the absorbent core 6A (step S601 shown in fig. 46). The absorbent core 6A is wrapped by the core wrap sheet 6B after the particles of the SAP are scattered (not shown). Thereby, the absorbent body 6 was produced. The absorbent body 6 is conveyed to a conveyance line M1 where the next manufacturing process is performed. The process in the conveying line M1 is the same as that in embodiment 1 described above.

According to the method of manufacturing the diaper 1 of the present modification, the SAP particle group 32 is arranged on the non-skin surface side of the absorbent core 6A to exhibit the anchor effect, so that the restoring force of the absorbent core 6A is suppressed and the shape of the concave portion 40 is easily maintained.

< modification 8-2>

Next, a method for manufacturing the diaper 1 of modification 8-2 of the present embodiment will be described. Fig. 48 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present modification. In the method of manufacturing a diaper according to the present modification, after the top sheet 7 is attached to the skin surface side of the absorbent body 6 in a stretched state (after step S502 shown in fig. 42), the back sheet 5 is attached to the non-skin surface side of the absorbent body 6 (step S503, an example of the "non-skin surface side sheet attaching step" in the present application). In step S503, at least a part of the surface of the recess 40 and the backsheet 5 are not bonded. Thereby, a gap is formed between the concave portion 40 and the back sheet 5, and therefore, the concave portion 40 can function as a flow path for diffusing urine. This makes it easier for the diaper 1 to spread urine on the non-skin surface side of the absorbent body 6, and allows more urine to be absorbed and retained on the non-skin surface side of the absorbent body 6. Therefore, the diaper 1 can maintain the convex portion 41 formed on the skin surface side of the absorbent body 6 even after urine absorption, and can ensure air permeability by the convex portion 41. In this modification, the step S601 shown in fig. 46 (SAP placement step) may be performed before the step S501. In this case, by covering the non-skin surface side of the absorbent body 6 with the back sheet 5, the SAP can be prevented from spilling to the outside of the diaper 1 even if the non-skin surface side of the core wrap sheet 6B is broken.

Next, a method for manufacturing the diaper 1 of the present modification will be described in more detail with reference to fig. 49. Fig. 49 is a diagram showing an example of the apparatus for producing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M30, a coating apparatus M7, and a backsheet supply roll M8. The transport line M30 is a conveyor for transporting the backsheet 5, the absorbent body 6, and the top sheet 7 in a predetermined direction (in the figure, the direction of arrow a 1). The top sheet 7 is already attached to the absorbent body 6, and the absorbent body 6 and the top sheet 7 are conveyed so that the absorbent body 6 is on the upper side.

The applicator M7 has a plurality of nozzles for ejecting the hot-melt adhesive, and applies the hot-melt adhesive to the absorbent body 6 in a stripe-like or dot-like manner. A backsheet supply roller M8 is provided downstream of the coating device M7 in the conveyance path of the conveyance line M30. The backsheet supply roller M8 places the backsheet 5 as a continuous body from the long material roll on the absorbent body 6 placed on the conveyance line M1 (step S503 shown in fig. 48). At this time, the backsheet 5 is placed on the absorbent body 6 in a stretched state. By not adhering at least a part of the surface of the concave portion 40 to the back sheet 5 as in the present modification, a gap can be formed between the concave portion 40 and the back sheet 5.

Further, urine that has reached the non-skin surface side of the absorbent body 6 spreads over the entire absorbent body 6 through the concave portions 40. Since the SAP is disposed on the non-skin surface side of the absorbent core 6A, the absorbent body 6 holds urine on the non-skin surface side, and thereby the non-skin surface side swells. Therefore, the absorbent body 6 is less likely to swell on the skin surface side even after urine absorption, and the shape of the convex portion 41 formed on the skin surface side is easily maintained.

< embodiment 9>

Next, the diaper 1 of embodiment 9 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and description thereof is omitted. Fig. 50 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 51 is a cross-sectional view of diaper 1 taken along line EE of fig. 50 in the width direction. In fig. 50 and 51, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not shown. Fig. 52 is an enlarged view of the concave portion 40 and the convex portion 41 at position 2 in fig. 51. The one-dot chain line CL in fig. 50 is a center line in the width direction of the diaper 1. The widthwise center of the diaper 1 coincides with the widthwise center of the absorbent body 6.

As shown in fig. 52, in the present embodiment,: the top 41T of the convex portion 41 on the left side in the width direction of the absorbent body 6 is inclined to the right side in the width direction, and the top 41T of the convex portion 41 on the right side in the width direction of the absorbent body 6 is inclined to the left side in the width direction. This allows the diaper 1 to flow urine discharged from the wearer toward the widthwise central portion, thereby preventing lateral leakage (side leakage) of urine and retaining feces discharged from the wearer at the widthwise central portion.

Here, the convex portion 41 at 2 shown in fig. 52 can be regarded as a pair of adjacent convex portions 41 in the present application. By inclining the top portions 41T of the adjacent pair of the convex portions 41 in the direction facing each other, urine and feces can be guided between the pair of the convex portions 41, and the pair of the convex portions 41 can function as a housing space. For example, by providing the pair of adjacent projections 41 as the projections 41 surrounding the anus contact position of the diaper 1, the tops 41T of the pair of projections 41 are inclined in the direction facing each other, and the space between the pair of projections 41 can function as a housing space for housing feces.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. In the manufacturing method of the present embodiment, a pressing device M2 shown in fig. 53 is used. Fig. 53 is a cross-sectional view of the pressing device M2 shown in fig. 43 cut in the rotation axis direction. For example, as shown in fig. 53, the top portion M21T of the recessed portion M21D of the upper roller M21 is inclined inward in the width direction, so that the top portion 41T of the projecting portion 41 can be inclined inward in the width direction in the projection and recess forming step. Further, the top 41T of the convex portion 41 on the left side in the width direction of the absorbent body 6 is inclined to the right side in the width direction, and the top 41T of the convex portion 41 on the right side in the width direction of the absorbent body 6 is inclined to the left side in the width direction. Further, by thus inclining the top portion M21T of the concave portion M21D of the upper roller M21, the convex portion 41 can be formed so as to incline the top portion 41T.

< embodiment 10>

Next, the diaper 1 of embodiment 10 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. Fig. 54 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 55 is a cross-sectional view of the diaper 1 taken along the line FF in fig. 54 in the width direction. In fig. 54 and 55, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not shown.

In the present embodiment, the top sheet 7 is formed with holes 42. As shown in fig. 54, for example, a plurality of holes 42 are formed in a staggered manner. The arrangement pattern of the holes 42 may not be a zigzag pattern, and may be a matrix pattern, for example. Further, the hole 42 is formed in a circular shape, but may be an oval shape or other polygonal shapes. In the diaper 1 of the present embodiment, the top sheet 7 is provided with the holes 42, so that the urine permeability and air permeability of the top sheet 7 can be improved. This improves the wearing feeling of the diaper 1 of the present embodiment.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. In the manufacturing method of the present embodiment, the top sheet 7 provided with the notch is prepared, and the skin surface side sheet sticking step is performed before the unevenness forming step. Fig. 56 is a flowchart showing an outline of the method of manufacturing the diaper 1 of the present embodiment. In the method of manufacturing a diaper according to the present embodiment, first, the prepared top sheet 7 is attached to the skin surface side of the absorbent body 6 in a stretched state (step S701, an example of the "skin surface side sheet attaching step" in the present application). Fig. 57 is a plan view of the top sheet 7 prepared in the production method of the present embodiment, as viewed from the skin surface side. A plurality of slits 43 extending in the width direction are formed in the top sheet 7 in a staggered manner. After step S701, the concave portions 40 and the convex portions 41 are formed in the absorber 6 (step S702, an example of the "concave-convex forming step" in the present application). In the present embodiment, the top sheet attaching step is performed before the unevenness forming step. When the top sheet 7 is pressed by the pressing device M2 in the concave-convex forming step, the slits 43 extending in the width direction are elongated in the longitudinal direction to form the circular holes 42.

Next, a manufacturing apparatus used in the method for manufacturing the diaper 1 according to the present embodiment will be described with reference to fig. 58. Fig. 58 is a diagram showing an example of an apparatus for manufacturing the diaper 1. The manufacturing apparatus M used in the method of manufacturing the diaper 1 includes a conveyance line M1, a coating apparatus M4, a top sheet supply roller M5, and a pressing apparatus M2.

In the transport line M1, the absorbent body 6 is transported so that the skin surface side faces upward. In the present embodiment, the coating device M4, the top sheet supply roller M5, and the pressing device M2 are provided in this order from the upstream side. Thus, the top sheet attaching step is performed before the unevenness forming step.

According to the manufacturing method of the present embodiment, the slits 43 are provided in the top sheet 7, so that the holes 42 can be formed from the slits 43. By providing the holes 42 in the diaper 1, the permeability to urine and the air permeability of the top sheet 7 can be improved, and the wearing feeling can be improved.

< embodiment 11>

Next, the diaper 1 of embodiment 11 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. Fig. 59 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 60 is a cross-sectional view of the diaper 1 taken along the GG line of fig. 59 in the width direction. In fig. 59 and 60, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not illustrated.

In the present embodiment, the hole 44 is formed in the skin surface side of the core wrap sheet 6B. As shown in fig. 59, for example, a plurality of holes 44 are formed in a staggered manner. The arrangement pattern of the holes 44 may not be a zigzag pattern, and may be a matrix pattern, for example. Further, the hole 44 is formed in a circular shape, but may be an elliptical shape, or may have another polygonal shape. In the diaper 1 of the present embodiment, the holes 42 are provided on the skin surface side of the core wrap sheet 6B, so that the urine permeability and the air permeability on the skin surface side of the absorbent body 6 can be improved. This improves the wearing feeling of the diaper 1 of the present embodiment.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. In the manufacturing method of the present embodiment, the absorbent core 6A and the core wrap sheet 6B wrapping the absorbent core 6A and having a notch on the skin surface side are prepared, and the irregularity forming step is performed in a state where the absorbent core 6A is wrapped by the core wrap sheet 6B. After preparing the absorbent body 6 having a structure in which the absorbent core 6A is wrapped with the core wrap sheet 6B, any of the manufacturing method of the above-described embodiment 8 shown in fig. 42 or the manufacturing method of the above-described embodiment 10 shown in fig. 56 can be employed. In addition, in the case where the manufacturing method of embodiment 10 shown in fig. 56 is employed, the top sheet 7 is provided with the holes 42. The diaper 1 may also be provided with apertures 42 in addition to the apertures 44.

Fig. 61 is a plan view of the absorbent body 6 prepared in the production method of the present embodiment, as viewed from the skin surface side. A plurality of slits 45 extending in the width direction are formed in a staggered manner in the core wrap sheet 6B of the absorber 6. In the present embodiment, the cuts 45 extending in the width direction are elongated in the longitudinal direction by being pressed by the pressing device M2 in the irregularity forming step in a state where the absorbent core 6A is wrapped by the core wrap sheet 6B, thereby forming the circular holes 44.

According to the manufacturing method of the present embodiment, the hole 44 can be formed from the notch 45 by providing the notch 45 in the core wrap sheet 6B. By providing the holes 44 in the diaper 1, the permeability to urine and the air permeability on the skin surface side of the absorber 6 can be improved, and the wearing feeling can be improved.

< other modifications of embodiments 8 to 11>

In the above embodiment, the concave portions 40 and the convex portions 41 are formed in a lattice shape, but the present invention is not limited thereto, and may be formed in a dot shape or a stripe shape. By providing the convex portion 41 on the skin surface side of the absorber 6, the diaper 1 can reduce the area of contact with the skin of the wearer, and can improve the wearing feeling.

In the above embodiment, the top sheet 7 may be formed of 2 sheets of nonwoven fabric, and the lower sheet may be an example of a skin surface side sheet. The absorbent body 6 may have a structure without the core wrap sheet 6B. In embodiments 9 to 11, the SAP arranging step shown in fig. 46 and 47 may be performed before the unevenness forming step. Further, a group of SAP particles may be arranged on the skin surface side of the absorbent core 6A. In this case, more particles of SAP are arranged on the non-skin surface side than on the skin surface side of the absorbent core 6A. The above-described embodiments and modifications can be combined with each other.

< embodiment 12>

Next, the diaper 1 of embodiment 12 will be explained. The same components as those of the diaper 1 and the manufacturing apparatus M according to the above embodiment are denoted by the same reference numerals, and their description is omitted.

Fig. 62 is a plan view of the diaper 1 in an extended state as viewed from the skin surface side. Fig. 63 is a cross-sectional view of the diaper 1 taken along line HH of fig. 62. In fig. 62 and 63, the front patch 2F, the elastic members 4C, 4SR, 4SL, 8EL, 8ER, 9ER, and the

side sheets

8L and 8R are not illustrated.

The diaper 1 of the present embodiment includes the compressed part 20 formed on the non-skin surface side of the absorbent body 6 and the concave part 21 formed on the skin surface side of the absorbent body 6. The squeezing portion 20 is formed by squeezing the absorbent body 6 from the non-skin surface side. The concave portions 21 are arranged at positions corresponding to the squeezing portions 20 on the skin surface side of the absorbent body 6 by pressurizing the absorbent body 6 after the squeezing portions 20 are formed. The corresponding position here is a position overlapping in the thickness direction of the diaper 1. The forming process of the pressing portion 20 and the concave portion 21 will be described later.

As shown in fig. 62, the pressing portion 20 includes a1 st pressing portion 20A and a2 nd pressing portion 20B which intersect each other, and a pressing intersection portion 20C in which the 1 st pressing portion 20A and the 2 nd pressing portion 20B intersect in an X shape. The recess 21 includes a1 st recess 210A and a2 nd recess 210B intersecting each other, and a recess intersecting portion 21C where the 1 st recess 210A and the 2 nd recess 210B intersect in an X-shape. The 1 st concave portion 210A is formed at a position corresponding to the 1 st pressing portion 20A, the 2 nd concave portion 210B is formed at a position corresponding to the 2 nd pressing portion 20B, and the concave portion intersecting portion 21C is formed at a position corresponding to the pressing intersecting portion 20C. The 1 st compressed part 20A and the 1 st recessed part 210A extend from the right front to the left rear of the diaper 1. The 2 nd compressed part 20B and the 2 nd concave part 210B extend from the left front to the right rear of the diaper 1. A plurality of the 1 st pressing portions 20A and a plurality of the 1 st recessed portions 210A are formed so as to extend parallel to each other, and a plurality of the 2 nd pressing portions 20B and a plurality of the 2 nd recessed portions 210B are formed so as to extend parallel to each other. The plurality of 1 st compressed

parts

20A and 2 nd compressed parts 20B are formed in a diagonal lattice shape with respect to the rectangular absorbent body 6, and the plurality of 1 st

concave parts

210A and 2 nd concave parts 210B are formed in a diagonal lattice shape with respect to the rectangular absorbent body 6. In this way, the compressed parts 20 and the concave parts 21 are formed in a diagonal lattice shape with respect to the rectangular absorbent body 6.

In the present embodiment, the 1 st compressed

parts

20A and 20B and the 1 st

concave parts

210A and 210B are formed in a groove shape extending in an oblique direction in the absorbent body 6. The diaper 1 can spread the urine discharged by the wearer over the entire absorbent body 6 along the concave portions 21 provided on the skin surface side of the absorbent body 6. Further, the diaper 1 can spread the urine permeated into the non-skin surface side of the absorbent body 6 to the entire absorbent body 6 along the absorbent part 20. This enables the diaper 1 to efficiently absorb urine discharged from the wearer by the entire absorbent body 6. In the diaper 1, the absorbent body 6 can be easily folded by providing the absorbent body 6 with the compressed parts 20 and the concave parts 21, and therefore, the feeling of fit to the wearer can be improved. In addition, in the diaper 1, the concave portion 21 is provided on the skin surface side of the absorber 6, so that air permeability on the skin surface side can be ensured, and hot flashes in a worn state can be suppressed.

The compressed portion 20 is formed by compressing the absorbent body 6. Since the portion of the absorbent body 6 to be compressed becomes hard, if the compressed portion 20 is indirectly brought into contact with the skin of the wearer through the sheet, the feeling of the skin is poor, and the wearing feeling is reduced. However, in the present embodiment, since the squeezing portions 20 are formed on the non-skin surface side of the absorbent body 6, the squeezing portions 20 do not indirectly contact the skin of the wearer through the sheet. In addition, since the concave portion 21 is formed not by pressing but by pressing, it is not harder than the pressing portion 20. Therefore, in the diaper 1, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearer's feeling can be suppressed from being lowered, and the wearer's feeling can be improved.

Fig. 64 is an enlarged view of the vicinity of the pressing portion 20 and the concave portion 21, as in fig. 4. The top sheet 7 is not bonded to the surface of the recess intersecting portion 21C, and is bonded to the surface of the absorbent body 6 outside the recess intersecting portion 21C by the hot melt adhesive 30. In the diaper 1 of the present embodiment, the surface of the top sheet 7 and the surface of the recessed portion intersecting portion 21C are not bonded to each other, so that the surface of the recessed portion intersecting portion 21C is less likely to contact the skin of the wearer through the top sheet 7, and the wearer is less likely to feel the hardness of the recessed portion intersecting portion 21C. This can improve the wearing feeling of the diaper 1.

Next, a method for manufacturing the diaper 1 of the present embodiment will be described. As a method of manufacturing the diaper 1 of the present embodiment, the method of manufacturing the diaper 1 of the above-described embodiment 1 shown in fig. 5 to 7 can be applied. In the production process of the diaper 1 of the present embodiment, the absorbent body 6 is conveyed so that the skin surface side faces upward at the conveyance line M1 shown in fig. 6. In the manufacturing step of step S103 shown in fig. 6, the top sheet 7 is placed on the absorbent body 6 in a stretched state. The surface of the recess intersecting part 21C and the top sheet 7 are not bonded. For example, a hot-melt adhesive is applied to the absorbent body 6 by the applicator M4 while avoiding the surface of the region where the recess intersecting portion 21C is formed. Thus, even if the top sheet 7 falls into the concave section intersecting section 21C, the surface of the concave section intersecting section 21C and the top sheet 7 can be prevented from being bonded.

The method of manufacturing the diaper 1 of the present embodiment forms the compressed parts 20 by compressing the absorbent body 6 from the non-skin surface side, and forms the concave parts 21 at the positions corresponding to the compressed parts 20 on the skin surface side of the absorbent body 6 by compressing the absorbent body 6. The concave portion 21 is not harder than the pressing portion 20 because it is formed not by pressing but by pressing. Therefore, according to the method of manufacturing the diaper 1 of the present embodiment, even if the concave portion 21 is brought into contact with the wearer through the top sheet 7, the wearing feeling can be suppressed from being lowered, and the wearing feeling can be improved.

< modification 12-1>

Next, the diaper 1 of the modification 12-1 of the present embodiment will be explained. Fig. 65 is an enlarged view of the vicinity of the compressed part 20 and the concave part 21 of the diaper 1 similar to fig. 64. As shown in fig. 65, in the diaper 1 of the present modification, the top sheet 7 is recessed into the concave portion 21, and the top sheet 7 is along the surface of the concave portion intersection portion 21C. The surface of the top sheet 7 and the surface of the recess intersecting part 21C are not bonded. In the diaper 1, since a force is easily applied to the recess intersecting portion 21C, there is a problem that the core wrap sheet 6B of the recess intersecting portion 21C is easily broken. If a gap is formed between the top sheet 7 and the surface of the recessed portion intersecting portion 21C, the top sheet 7 may be broken at the recessed portion intersecting portion 21C when a force is applied to the diaper 1 from the outside. However, by making the top sheet 7 follow the surface of the concave portion intersecting portion 21C as in the diaper 1 of the present embodiment, even when a force is applied from the outside, the top sheet 7 can be prevented from being broken.

Next, a method for producing the diaper 1 of modification 12-1 will be described. The manufacturing method of the present modification is characterized in that the top sheet 7 is attached to the skin surface side of the absorbent body 6 before the formation of the concave portions 21. As a method of manufacturing the diaper 1 of this modification, the method of manufacturing the diaper 1 of the modification 1-1 of embodiment 1 shown in fig. 8 and 9 can be applied. The top sheet 7 may be attached to the skin surface side of the absorbent body 6, and then the absorbent body 6 and the top sheet 7 may be pressed to form the concave portion 21 on the skin surface side of the absorbent body 6. Fig. 66 is a plan view of the absorbent body 6 coated with the hot-melt adhesive 30 as viewed from the skin surface side. In the method of manufacturing the diaper 1 of the present modification, the surface of the recess intersecting portion 21C is not bonded to the top sheet 7. For example, in the manufacturing method of the present modification, as shown in fig. 66, the hot-melt adhesive 30 is applied in a stripe shape avoiding the recess intersecting portion 21C by the application device M4 shown in fig. 9. Thus, in the recess forming step, even if the top sheet 7 is made to follow the surface of the recess intersecting portion 21C, the surface of the recess intersecting portion 21C and the top sheet 7 can be prevented from being bonded.

< modification 12-2>

Next, a method for manufacturing the diaper 1 of modification 12-2 of the present embodiment will be described. As a method of manufacturing the diaper 1 of this modification, the method of manufacturing the diaper 1 of the above-described modifications 1 to 4 of embodiment 1 shown in fig. 13 and 14 can be applied. In this modification, at least a part of the surface of the presser section 20 and the back sheet 5 are not bonded to each other. Further, urine that has reached the non-skin surface side of the absorbent body 6 spreads along the absorbent body 6 along the squeezing portions 20. Since the SAP is disposed on the non-skin surface side of the absorbent core 6A, the absorbent body 6 holds urine on the non-skin surface side, and thereby the non-skin surface side swells. Therefore, the absorbent core 6A is less likely to swell on the skin surface side even after urine absorption, and the shape of the concave portion 21 formed on the skin surface side is easily maintained.

In this modification, the concave portion forming step may be performed after the top sheet attaching step as in modification 12-1.

< other modification of embodiment 12>

In the above embodiment, the pressing portions 20 and the concave portions 21 are formed in a lattice shape, but the present invention is not limited thereto, and may be formed in a dot shape or a stripe shape. By providing the concave portion 21 on the skin surface side of the absorber 6, the diaper 1 can reduce the area in contact with the skin of the wearer, and can improve the wearing feeling. In the squeezing intersection 20C of the above embodiment, the 2 squeezing portions of the 1 st squeezing portion 20A and the 2 nd squeezing portion 20B intersect, but 3 or more squeezing portions may intersect in the squeezing intersection 20C. In the recess intersecting portion 21C in the above embodiment, 2 recesses, that is, the 1 st recess 210A and the 2 nd recess 210B intersect, but 3 or more recesses may intersect in the recess intersecting portion 21C.

In the above embodiment, the top sheet 7 may be formed of 2 sheets of nonwoven fabric, and the lower sheet may be an example of a skin surface side sheet. The absorbent body 6 may have a structure without the core wrap sheet 6B. Further, a group of SAP particles may be arranged on the skin surface side of the absorbent core 6A. In this case, more SAP particles may be disposed on the non-skin surface side than on the skin surface side of the absorbent core 6A. The above-described embodiments and modifications can be combined with each other.

The diaper 1 of the above embodiment is a belt-type diaper, but the method and apparatus for manufacturing an absorbent article of the present invention can be applied to the manufacture of a pants-type diaper. The above-described embodiments and modifications can be combined with each other.

In the absorbent article, the concave portion formed on the skin surface side of the absorbent body is deformed by the absorbent body absorbing urine and swelling. In the absorbent article, if the concave portion is deformed, the air permeability secured by the concave portion is impaired. Therefore, in the absorbent article, there is a problem that the air permeability is reduced after the absorbent body absorbs urine, and the wearing feeling is reduced. According to the diaper of the above embodiment, the wearing sensation of the absorbent article can be improved.

The purpose of the present invention is to provide a technique that can improve the wearing sensation of an absorbent article. According to the present invention, the wearing sensation of the absorbent article can be improved.

The present application includes the following matters to be noted.

< Note 1>

An absorbent article that absorbs liquid discharged by a wearer includes an absorbent body and a concave portion formed on a skin surface side of the absorbent body.

< appendix A1>

A method for manufacturing an absorbent article having an absorber that absorbs liquid discharged by a wearer, comprising: a pressing step of pressing the absorbent body from a non-skin surface side to form a pressed portion; and a recess forming step of forming a recess at a position corresponding to the squeezing portion on the skin surface side of the absorbent body by pressing the absorbent body.

< appendix A2>

The method of manufacturing an absorbent article according to supplementary note a1, further comprising a skin side sheet attaching step of attaching a skin side sheet to the skin surface side of the absorbent body in a stretched state after the recess forming step.

< appendix A3>

The method of manufacturing an absorbent article according to supplementary note a1, further comprising a skin side sheet sticking step of sticking a skin side sheet in a stretched state to the skin surface side of the absorbent body before the recess forming step.

< appendix A4>

The method of manufacturing an absorbent article according to supplementary note A2 or A3, wherein at least a part of the surface of the concave part and the skin surface side sheet are not bonded to each other.

< appendix A5>

The method of manufacturing an absorbent article according to supplementary note A2 or A3, wherein at least a part of the surface of the concave portion is bonded to the skin surface side sheet.

< appendix A6>

The method of manufacturing an absorbent article according to any one of supplementary notes a1 to a5, wherein the pressing portion is formed in a groove shape in the pressing step, and the concave portion is formed in a groove shape in the concave portion forming step.

< appendix A7>

The method of manufacturing an absorbent article according to any one of supplementary notes a1 to a6, further comprising a non-skin surface side sheet attaching step of attaching a non-skin surface side sheet to the non-skin surface side of the absorbent body so that at least a part of the surface of the compressed part is not adhered to the non-skin surface side sheet.

< appendix A8>

The method of manufacturing an absorbent article according to any one of supplementary notes a1 to a7, wherein the absorbent member has an absorbent core, and the method includes a hole forming step of forming a through hole that penetrates the absorbent core from the skin surface side to the non-skin surface side.

< appendix A9>

An absorbent article provided with an absorber that absorbs liquid discharged by a wearer, the absorbent article comprising: a pressing portion formed on the non-skin surface side of the absorber; and a concave portion formed at a position corresponding to the pressing portion on the skin surface side of the absorber.

< appendix B1>

An absorbent article that absorbs liquid discharged by a wearer, the absorbent article comprising: an absorbent body; a1 st recess formed on the skin surface side of the absorber; and a skin surface side sheet which is stuck to the skin surface side of the absorber and is not stuck to at least a part of the surface of the 1 st recess.

< appendix B2>

The absorbent article according to note B1, wherein the 1 st concave portion has a groove shape.

< appendix B3>

The absorbent article according to note B1 or B2, wherein the skin side sheet is not bonded to the entire surface of the 1 st recess.

< appendix B4>

The absorbent article according to any one of supplementary notes B1-B3, the absorbent body including SAP, which is a super absorbent polymer.

< appendix B5>

The absorbent article according to appendix B4, wherein the SAP is disposed at a higher density on the skin surface side of the absorber than on the non-skin surface side.

< appendix B6>

The absorbent article according to any one of supplementary notes B1 to B5, further comprising a2 nd concave portion formed on the non-skin surface side of the absorbent body, wherein the 1 st concave portion is formed at a position corresponding to the 2 nd concave portion.

< appendix B7>

The absorbent article according to any one of supplementary notes B1 to B6, further comprising a non-skin side sheet attached to the non-skin surface side of the absorbent body.

< Note C1>

An absorbent article that absorbs liquid discharged by a wearer, the absorbent article comprising: an absorbent body; a1 st recess formed on the skin surface side of the absorber; and a skin surface side sheet which is stuck to the skin surface side of the absorber and is stuck to at least a part of the surface of the 1 st recess.

< appendix C2>

The absorbent article according to note C1, wherein the skin surface side sheet is integrally bonded to the surface of the 1 st concave part.

< appendix C3>

The absorbent article according to note C1 or C2, the 1 st depression is groove-shaped.

< Note C4>

The absorbent article according to note C3, wherein the skin side sheet is bonded to a part of the surface of the 1 st concave part.

< appendix C5>

The absorbent article according to note C3 or C4, the 1 st recess has a pair of wall portions and a bottom portion disposed between the pair of wall portions, and the skin surface side sheet is bonded to a part of the wall portions.

< appendix C6>

The absorbent article according to any one of supplementary notes C1 to C5, further comprising a2 nd concave portion formed on the non-skin surface side of the absorbent body, wherein the 1 st concave portion is formed at a position corresponding to the 2 nd concave portion.

< appendix C7>

The absorbent article described in any one of supplementary notes C1 to C6 further includes a non-skin side sheet attached to the non-skin surface side of the absorbent body.

< appendix D1>

A method for manufacturing an absorbent article having an absorber that absorbs liquid discharged by a wearer, comprising: an SAP arranging step of arranging a group of SAP particles, which are superabsorbent polymers, on a non-skin surface side of the absorber; a pressing step of pressing the absorbent body from the non-skin surface side to form a pressed portion; and a recess-forming step of forming recesses at positions corresponding to the squeezing portions on the skin surface side of the absorbent body by pressing the absorbent body.

< appendix D2>

The method of manufacturing an absorbent article according to supplementary note D1, wherein the pressing portion is formed in a groove shape in the pressing step, and the concave portion is formed in a groove shape in the concave portion forming step.

< appendix D3>

The method of manufacturing an absorbent article according to supplementary note D1 or D2, further comprising a non-skin surface side sheet attaching step of attaching the non-skin surface side sheet to the non-skin surface side of the absorbent body so that at least a part of the surface of the pressing part is not adhered to the non-skin surface side sheet.

< appendix D4>

The method of manufacturing an absorbent article according to any one of supplementary notes D1 to D3, wherein the absorbent body has an absorbent core, and the method includes a hole forming step of forming a through hole that penetrates the absorbent core from the skin surface side to the non-skin surface side.

< appendix D5>

The method of manufacturing an absorbent article according to any one of supplementary notes D1 to D4, further comprising a skin side sheet sticking step of sticking the skin side sheet in a stretched state to the skin surface side of the absorbent body after the recess forming step.

< appendix D6>

In the method of manufacturing an absorbent article described in supplementary note D5, the pressing portions are formed in a lattice shape in the pressing step, and the recessed portions are formed in a lattice shape in the recessed portion forming step, so that lattice points of the recessed portions do not adhere to the skin surface side sheet.

< appendix D7>

An absorbent article having an absorber that absorbs liquid discharged by a wearer, the absorbent article comprising: a group of SAP particles as superabsorbent polymers disposed on the non-skin surface side of the absorber; a pressing section formed on the non-skin surface side of the absorber; and a recess formed at a position corresponding to the squeezing portion on the skin surface side of the absorber.

< appendix E1>

A method for manufacturing an absorbent article having an absorber that absorbs liquid discharged by a wearer, comprising: a concave-convex forming step of forming a concave portion by partially recessing the non-skin surface side of the absorbent body and forming a convex portion by partially protruding the skin surface side of the absorbent body; and a skin surface side sheet sticking step of sticking a skin surface side sheet to the skin surface side of the absorber.

< appendix E2>

In the method of manufacturing an absorbent article described in supplementary note E1, in the irregularity forming step, the concave portions are formed in a groove shape on the non-skin surface side of the absorbent body, and the convex portions are formed so as to correspond to the concave portions on the skin surface side of the absorbent body.

< appendix E3>

The method of manufacturing an absorbent article according to supplementary note E1 or E2, including an SAP placement step of placing a group of SAP particles, which are superabsorbent polymers, on the non-skin surface side of the absorber before the irregularity forming step.

< appendix E4>

The method of manufacturing an absorbent article according to any one of supplementary notes E1 to E3, comprising a non-skin-side sheet attachment step of attaching the non-skin-side sheet to the non-skin-side surface of the absorbent body so that at least a part of the surface of the concave portion is not adhered to the non-skin-side sheet.

< appendix E5>

In the method of manufacturing an absorbent article according to any one of supplementary notes E1 to E4, in the uneven portion forming step, the top portions of a pair of adjacent convex portions are formed so as to be inclined in a direction facing each other.

< appendix E6>

The method of manufacturing an absorbent article according to any one of supplementary notes E1 to E5, wherein the skin-side sheet attachment step is performed after the irregularity forming step, and the skin-side sheet attachment step attaches the skin-side sheet to the skin surface side of the absorbent body in a state of being along the convex portion.

< appendix E7>

The method of manufacturing an absorbent article according to any one of supplementary notes E1 to E5, wherein the skin surface side sheet provided with the slit is prepared, and the skin surface side sheet attaching step is performed before the irregularity forming step in which the skin surface side sheet is pressed to be made to follow the convex portion.

< appendix E8>

The method of manufacturing an absorbent article according to any one of supplementary notes E1 to E7, wherein the absorbent body has an absorbent core and a core wrap sheet that wraps the absorbent core and has a notch at the skin surface side, and the step of forming the irregularities is performed in a state where the absorbent core is wrapped by the core wrap sheet.

< appendix E9>

An absorbent article provided with an absorber that absorbs liquid discharged by a wearer, the absorbent article comprising: a recess which is formed by partially recessing the non-skin surface side of the absorber; a convex portion formed by partially projecting the skin surface side of the absorber; and a skin surface side sheet attached to the skin surface side of the absorber so as to extend along the convex portion.

< appendix F1>

A method for manufacturing an absorbent article having an absorber that absorbs liquid discharged by a wearer, comprising: a pressing step of pressing the absorbent body from a non-skin surface side to form a pressing portion having a1 st pressing portion and a2 nd pressing portion intersecting each other, and a pressing intersection portion where the 1 st pressing portion and the 2 nd pressing portion intersect each other; a recess forming step of forming a recess having a1 st recess and a2 nd recess intersecting each other and a recess intersecting portion where the 1 st recess and the 2 nd recess intersect, at a position corresponding to the compressed portion on the skin surface side of the absorbent body, by pressing the absorbent body; and a skin surface side sheet sticking step of sticking the skin surface side sheet to the skin surface side of the absorbent body in a stretched state and not sticking the surface of the recess intersection portion and the skin surface side sheet.

< appendix F2>

The method of manufacturing an absorbent article according to supplementary note F1, wherein the compressed parts are in a lattice shape having a plurality of the 1 st compressed parts and the 2 nd compressed parts, and the recessed parts are in a lattice shape having a plurality of the 1 st recessed parts and the 2 nd recessed parts.

< appendix F3>

The method of manufacturing an absorbent article according to supplementary note F1 or F2, wherein the skin-side sheet attaching step is performed before the recess forming step, and in the recess forming step, the skin-side sheet is made to follow the surface of the recess intersection by pressing the absorbent body and the skin-side sheet.

< appendix F4>

The method of manufacturing an absorbent article according to any one of supplementary notes F1 to F3, including a non-skin surface side sheet attaching step of attaching the non-skin surface side sheet to the non-skin surface side of the absorbent body so that at least a part of the surface of the compressed part is not adhered to the non-skin surface side sheet.

< appendix F5>

An absorbent article provided with an absorber that absorbs liquid discharged by a wearer, the absorbent article comprising: a pressing portion formed on the non-skin surface side of the absorbent body and having a1 st pressing portion and a2 nd pressing portion that intersect each other, and a pressing intersection portion where the 1 st pressing portion and the 2 nd pressing portion intersect each other; a recess formed at a position corresponding to the squeezing portion on the skin surface side of the absorbent body, and having a1 st recess and a2 nd recess intersecting each other, and a recess intersecting portion where the 1 st recess and the 2 nd recess intersect; and a skin surface side sheet which is adhered to the skin surface side of the absorber and is not adhered to the surface of the intersection of the concave portions.

Claims

1. A method for manufacturing an absorbent article having an absorbent body that absorbs liquid discharged by a wearer, the method comprising:

a pressing step of forming a pressing portion by pressing the absorbent body from a non-skin surface side; and

and a recess forming step of forming a recess at a position corresponding to the squeezing portion on the skin surface side of the absorbent body by pressing the absorbent body.

2. The method of manufacturing an absorbent article according to claim 1,

further comprising a skin side sheet sticking step of sticking the skin side sheet to the skin surface side of the absorber in a stretched state after the recess forming step.

3. The method of manufacturing an absorbent article according to claim 1,

further comprising a skin surface side sheet sticking step of sticking the skin surface side sheet to the skin surface side of the absorber (6) in a stretched state before the recess forming step.

4. The method of manufacturing an absorbent article according to claim 2 or 3, wherein at least a part of the surface of the concave portion and the skin surface side sheet are not bonded.

5. The method of manufacturing an absorbent article according to claim 2 or 3, wherein at least a part of the surface of the concave portion is bonded to the skin surface side sheet.

6. The method of manufacturing an absorbent article according to claim 2 or 3,

in the pressing step, the pressing portion is formed in a groove shape,

in the recess forming step, the recess is formed in a groove shape.

7. The method of manufacturing an absorbent article according to claim 2 or 3,

further comprising a non-skin surface side sheet sticking step of sticking a non-skin surface side sheet to the non-skin surface side of the absorbent body (6) and not sticking at least a part of the surface of the pressing part to the non-skin surface side sheet.

8. The method of manufacturing an absorbent article according to claim 2 or 3,

the absorbent body (6) has an absorbent core (6A),

the manufacturing method further comprises a hole forming step of forming a through hole for penetrating the absorbent core (6A) from the skin surface side to the non-skin surface side.

9. The method of manufacturing an absorbent article according to claim 1,

further comprises an SAP arranging step of arranging a group of SAP particles as a super absorbent polymer on the non-skin surface side of the absorbent body (6).

10. The method of manufacturing an absorbent article according to claim 9,

further comprising a skin side sheet sticking step of sticking the skin side sheet to the skin surface side of the absorbent body (6) in a stretched state after the recess forming step.

11. The method for manufacturing an absorbent article according to claim 10,

in the pressing step, the pressing portion is formed in a lattice shape,

in the recess forming step, the recesses are formed in a lattice shape,

the lattice points of the recesses and the skin surface side sheet are not bonded.

12. The method for manufacturing an absorbent article according to claim 1,

in the pressing step, the pressing portion having a1 st pressing portion and a2 nd pressing portion intersecting each other and a pressing intersection portion where the 1 st pressing portion and the 2 nd pressing portion intersect each other is formed,

in the recess forming step, the recess having a1 st recess and a2 nd recess intersecting each other and a recess intersecting portion where the 1 st recess and the 2 nd recess intersect is formed,

the manufacturing method further comprises a skin surface side sheet sticking step of sticking the skin surface side sheet to the skin surface side of the absorber (6) in a stretched state and not sticking the surface of the recess intersection part and the skin surface side sheet.

13. The method for manufacturing an absorbent article according to claim 12,

the pressing part is in a lattice shape having a plurality of the 1 st pressing part and the 2 nd pressing part,

the recessed portion is in a lattice shape having a plurality of the 1 st recessed portions and the 2 nd recessed portions.

14. The method of manufacturing an absorbent article according to claim 12 or 13,

the skin surface side sheet attaching step is performed before the recess forming step,

in the recess forming step, the absorbent body (6) and the skin surface side sheet are pressed so that the skin surface side sheet follows the surface of the recess intersection.

15. An absorbent article provided with an absorbent body (6) that absorbs liquid discharged by a wearer, the absorbent article being characterized by comprising:

a pressing section formed on the non-skin surface side of the absorbent body (6); and

and a recess formed at a position corresponding to the squeezing section on the skin surface side of the absorber (6).

16. The absorbent article of claim 15,

the recess is a1 st recess,

the absorptive article further comprises a skin surface side sheet which is stuck to the skin surface side of the absorptive body (6) and which is not stuck to at least a part of the surface of the 1 st concave portion.

17. The absorbent article of claim 16,

the 1 st recess is groove-shaped.

18. The absorbent article of claim 16,

the skin surface side sheet is not bonded to the entire surface of the 1 st recess.

19. The absorbent article of claim 16,

the absorbent body (6) comprises superabsorbent polymers (SAP).

20. The absorbent article of claim 19,

the SAP is arranged on the skin surface side of the absorber (6) at a higher density than on the non-skin surface side.

21. The absorbent article of claim 16,

further comprises a2 nd concave part formed on the non-skin surface side of the absorber (6),

the 1 st recess is formed at a position corresponding to the 2 nd recess.

22. The absorbent article according to any one of claims 16 to 21,

further provided is a non-skin side sheet which is adhered to the non-skin side of the absorbent body (6).

23. The absorbent article of claim 15,

the recess is a1 st recess,

the absorbent article further comprises a skin surface side sheet which is adhered to the skin surface side of the absorbent body (6) and is adhered to at least a part of the surface of the 1 st concave portion.

24. The absorbent article of claim 23,

the skin surface side sheet is bonded to the entire surface of the 1 st recess.

25. The absorbent article of claim 23,

the 1 st recess is groove-shaped.

26. The absorbent article of claim 23,

the skin side sheet is bonded to a part of the surface of the 1 st recess.

27. The absorbent article of claim 26,

the 1 st recess has a pair of wall portions and a bottom portion disposed between the pair of wall portions,

the skin side sheet is bonded to a portion of the wall portion.

28. The absorbent article of claim 23,

the 1 st recess is formed at a position corresponding to the 2 nd recess.

29. The absorbent article according to any one of claims 23 to 28,

further comprises a non-skin side sheet adhered to the non-skin side of the absorbent body (6).

30. The absorbent article of claim 15,

further comprises a group of SAP particles which are highly absorbent polymers and are disposed on the non-skin surface side of the absorbent body (6).

31. The absorbent article of claim 15,

the pressing part comprises a1 st pressing part and a2 nd pressing part which are mutually crossed, and a pressing cross part where the 1 st pressing part and the 2 nd pressing part are crossed,

the recess has a1 st recess and a2 nd recess intersecting each other, and a recess intersecting portion where the 1 st recess and the 2 nd recess intersect,

the absorbent article further comprises a skin surface side sheet which is adhered to the skin surface side of the absorbent body (6) and is not adhered to the surface of the recess intersection.

32. A method for manufacturing an absorbent article having an absorbent body (6) that absorbs liquid discharged by a wearer, the method comprising:

a concave-convex forming step of partially recessing the non-skin surface side of the absorbent body (6) to form a concave portion and partially protruding the skin surface side of the absorbent body (6) to form a convex portion; and

and a skin surface side sheet sticking step of sticking a skin surface side sheet to the skin surface side of the absorber (6).

33. An absorbent article provided with an absorbent body (6) that absorbs liquid discharged by a wearer, the absorbent article being characterized by comprising:

a recess formed by partially recessing the non-skin surface side of the absorber (6);

a convex portion formed by partially projecting the skin surface side of the absorber (6); and

and a skin surface side sheet which is attached to the skin surface side of the absorbent body (6) so as to extend along the convex portion.