JP6220668B2 - Absorbent article - Google Patents

Description

  The present invention relates to an absorbent article.

  Absorbent articles include diapers (diapers for children and adults), sanitary napkins, incontinence measures products, body fluids discharged from wearers such as training pants, and superabsorbent resin (hereinafter also referred to as “SAP”). It is an article that is absorbed and processed by an absorber using fluffed wood pulp or the like.

In conventional absorbent articles, body fluid is discharged directly from the wearer's discharger onto the surface of the absorber, and is absorbed into the absorber by diffusion on the surface of the absorber and migration from the surface of the absorber to the interior. And processed.
Therefore, in order to prevent leakage of body fluid from the absorbent article to the outside thereof, the surface of the absorbent body and the skin of the wearer, so as not to cause a gap between the absorbent article and the wearer's body, In particular, it was necessary to bring the ejector into close contact.
However, when the absorbent article is used in such a state, after the body fluid is discharged, the wearer's skin is in close contact with the surface of the absorbent body wet with the body fluid. If the wearer's skin is in contact with body fluids for a long time, it not only is uncomfortable for the wearer, but also causes the skin to swell and cause bacterial growth, causing rashes and inflammation. There was a problem of becoming.

As a new proposal for solving such problems of the conventional absorbent article, the present inventor has applied body fluid to the absorbent body, in particular, to the crotch portion (the crotch part) that is a position corresponding to the excretor of the wearer. In order not to transfer directly, the body fluid that has been discharged and the wearer are newly introduced between the surface of the absorbent body and the wearer's skin by introducing a unit that enables the movement and distribution of body fluids before and after the absorbent body. Proposed a method to effectively avoid contact with the skin.
In Patent Document 1, the unit is proposed as a floating leg gather. In Patent Document 2, the unit is proposed as a body fluid movement path. In Patent Document 3, the unit is proposed as a bodily fluid reception canal. Each of the units according to these proposals is coupled to a pair of left and right heads and a pair of left and right heads, and has a hanging part that hangs down, and only the pair of left and right heads contact the skin of the wearer. Is common.

Japanese Patent No. 5086492 Japanese Patent No. 5236121 Japanese Patent No. 5236122

  When this inventor advanced the research of the absorber article | item which has various units described in patent documents 1-3, in the bodily fluid reception canal in patent document 3, it is the discharged body fluid and a wearer's skin. I thought there was room to avoid contact more effectively.

  The inventor forms at least a canal sheet that forms a bodily fluid reception canal in an absorbent article that forms a bodily solid body fluid reception canal in a region having a bottom surface coupling portion where a valley shape solid shape is formed. The present inventors have found that a three-dimensional shape of a valley of a body fluid receiving canal can be stably maintained by joining plus sheets that reinforce a part of both side surfaces, and completed the present invention.

That is, the present invention provides the following (1) to (10) .
(1) An absorbent article body having a sheet-like leak preventer and an absorber capable of absorbing bodily fluid disposed on at least one layer on the leak preventer,
A pair of left and right parts arranged from the front end portion in the front-rear direction of the absorbent article main body to the rear end portion through the front body, the crotch portion, and the rear body, and joined at the front end portion and the rear end portion. A head elastic body,
The left and right edges each have a canal sheet that is coupled to the pair of left and right head elastic bodies,
In the front body, the crotch part, and the back body, the canal sheet is configured to hang down in a convex shape toward the surface of the absorber below the head stretchable body, and the pair of left and right head stretchable bodies The gap between the upper and lower edges of the canal sheet is a side surface, and the vicinity of the center of the canal sheet in the left-right direction is the bottom surface.In the region including the crotch, the bottom surface of the bottom surface and the surface of the absorber An absorbent article in which a body fluid receiving canal having a valley-shaped three-dimensional shape having a bottom joint portion is formed,
In the region having the bottom surface coupling portion, a plus sheet that reinforces at least a part of both side surfaces of the canal sheet is joined so as not to exist in the central portion in the left-right direction, and the valley-shaped three-dimensional shape of the body fluid receiving canal Absorbent article that stably holds.
(2) an absorbent article body having a sheet-like leak preventer and an absorber capable of absorbing bodily fluid disposed on at least one layer of the leak preventer,
A pair of left and right parts arranged from the front end portion in the front-rear direction of the absorbent article main body to the rear end portion through the front body, the crotch portion, and the rear body, and joined at the front end portion and the rear end portion. A head elastic body,
The left and right edges each have a canal sheet that is coupled to the pair of left and right head elastic bodies,
In the front body, the crotch part, and the back body, the canal sheet is configured to hang down in a convex shape toward the surface of the absorber below the head stretchable body, and the pair of left and right head stretchable bodies The gap between the upper and lower edges of the canal sheet is a side surface, and the vicinity of the center of the canal sheet in the left-right direction is the bottom surface.In the region including the crotch, the bottom surface of the bottom surface and the surface of the absorber An absorbent article in which a body fluid receiving canal having a valley-shaped three-dimensional shape having a bottom joint portion is formed,
In the region having the bottom surface coupling portion, a plus sheet that reinforces at least a part of both side surfaces of the canal sheet from one side to the other of the left and right parts coupled to the head extension body of the canal sheet in the left-right direction. An absorbent article which is joined so as to extend and stably retains the three-dimensional shape of the valley of the bodily fluid reception canal.
(3) The absorbent article according to (1) or (2) , wherein the plus sheet is provided outside the right and left side surfaces of the canal sheet.
(4) The absorbent article according to any one of (1) to (3), wherein the plus sheet is provided inside the left and right side surfaces of the canal sheet.
(5) Any of the above (1) to (4) , wherein the bottom surface coupling portion extends from the crotch part to the front body, and the plus sheet extends from the crotch part of the canal sheet to the front body. An absorbent article according to any one of the above.
(6) Any of the above (1) to (5) , wherein the bottom surface coupling portion extends from the crotch part to the back body, and the plus sheet extends from the crotch part of the canal sheet to the back body. An absorbent article according to any one of the above.
(7) The absorbent article according to any one of (1) to (6) , wherein the canal sheet is liquid-permeable and the plus sheet is liquid-impermeable.
(8) The absorbent article according to any one of (1) to (6) , wherein the canal sheet is liquid-impermeable and the plus sheet is liquid-permeable.
(9) The absorbent article according to any one of (1) to (8) , wherein the plus sheet is made of foam sheets.
(10) The absorbent article according to any one of (1) to (8) , wherein the plus sheet is configured by a sheet-like absorber.

  The absorbent article of the present invention stably maintains the three-dimensional shape of the valley shape of the body fluid receiving canal by joining plus sheets that reinforce a part of at least both sides of the canal sheet forming the body fluid receiving canal. The contact between the discharged body fluid and the wearer's skin can be avoided more effectively.

It is a schematic diagram which shows the example of the embodiment of the absorber article | item of this invention. It is a typical top view of a plus sheet. It is a schematic diagram which shows the various arrangement | positioning states of a plus sheet. It is a schematic diagram which shows the various arrangement | positioning states of a plus sheet. It is a schematic diagram which shows the various arrangement | positioning states of a plus sheet. It is a schematic diagram which shows the various arrangement | positioning states of a plus sheet. It is a schematic diagram which shows another example of the embodiment of the absorber article | item of this invention. It is a schematic diagram which shows another example of the embodiment of the absorbent article of the present invention. It is a schematic diagram which shows the example of the embodiment of the absorber article | item incorporating the connection sheet which concerns on a prior art. It is a schematic diagram which shows another example of the embodiment of the absorber article | item incorporating the connection sheet which concerns on a prior art.

DESCRIPTION OF SYMBOLS 10 Leak preventer 12, 12a Absorber 13 Surface sheet 14, 14a, 14b Head elastic body 16, 16a Canal sheet 18 Front end joint part 20 Rear end joint part 22 Joint part 24, 24a, 24b, 24c, 24d, 24e, 24f, 24g, 24h, 24i Bottom joint portion 26, 26a, 26b, 26c, 26d, 26e, 26f, 26g, 26h, 26i, 26j, 26k, 26l Plus seat 28 Outer leg gather (OLG)
30 Detachable member 32 Binding layer 34, 34a Connecting sheet 34 ', 34a' Hydrophilic sheet 34 ", 34a" Hydrophobic sheet 36, 36a Linear coupling part 100, 101, 102, 103, 104 Absorber article C Inseam Ca Body fluid reception canal F Front body R Rear body

Hereinafter, an absorbent article according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings. In the present specification, when the absorbent article of the present invention is actually worn, the side closer to the wearer's skin is referred to as “upper” and the far side is referred to as “lower”. Further, when the absorbent article of the present invention is actually worn, the side corresponding to the front side of the wearer's body is referred to as “front”, and the side corresponding to the rear side is referred to as “rear”. Moreover, in order to make an understanding easy in each figure, the member which is actually contacting may be shown spaced apart. In each plan view in the attached drawings, the front side of the absorbent article or the like is shown on the left side of the figure.
In the present specification, the “absorbent article body” means a leak preventer that is a constituent member of the absorbent article, a top sheet that can be provided on the leak preventer, and other absorbent articles. The various members are collectively referred to. Accordingly, when the absorbent article is a diaper, the absorbent article body is referred to as a diaper body.
Furthermore, in this specification, the “surface of the absorber” means the surface when the absorber is exposed, and the absorber is a diffusion sheet, an acquisition sheet, a top sheet (surface sheet), a core. When covered with a wrap sheet or the like, it means the surface of the diffusion sheet, acquisition sheet, top sheet (surface sheet), core wrap sheet or the like that is covered.

FIG. 1 is a schematic diagram illustrating an example of an embodiment of an absorbent article according to the present invention. FIG. 1A is a developed plan view schematically showing a state (tensed state) in which the absorbent article is stressed and pulled in the front-rear direction and the left-right direction to be developed into a substantially flat shape. FIG. 1B is a lateral end view of the tensioned state along the line IB-IB in FIG. FIG. 1C is a lateral end view taken along the line IB-IB in FIG. 1A when stress is not applied to the absorbent article (in a relaxed state).
The absorbent article 100 shown in FIG. 1 is configured as a children's tape-type diaper (M size (for a weight of about 6 to 11 kg)).
The size of each member of the absorbent article 100 described below is an example in the case of an M size, and can be changed as appropriate. If the size of the absorbent article is different, naturally each member The size of will also change. Moreover, the magnitude | size of each member of the absorber article | item 100 demonstrated below is a thing of a tension | tensile_strength unless there is particular description.

  The absorbent article 100 of the present invention shown in FIG. 1 basically includes a sheet-shaped leak preventer 10 and an absorber 12 that is disposed at least one layer above the leak preventer 10 and can absorb body fluid. An absorbent article main body having an absorbent article main body, the front end, and the front end F, the crotch C, and the rear end R from the front end in the front-rear direction of the absorbent article main body to the rear end. A pair of left and right head telescopic bodies 14 coupled at the rear end portion and a canal sheet 16 whose left and right edge portions are coupled to the pair of left and right head telescopic bodies 14, respectively.

As the material of the leak preventer 10, a material generally used as a back sheet can be used. Specifically, for example, a resin film such as PE, PP, PET, and EVA; and a body fluid impermeable sheet such as a foamed sheet of the resin can be used. As the body fluid impermeable sheet, a material having air permeability such as an air permeable film is also preferably used.
Moreover, when using the film of the said resin, in order to improve a touch and an external appearance, it can also be used as a multilayer sheet | seat of a film and a nonwoven fabric. In this case, as the nonwoven fabric, SB, SMS, thermal bond nonwoven fabric (for example, air-through type) having a relatively low basis weight, and the like are preferably used.
Also, a multilayer sheet of the resin film and a sheet-like absorber described later can be used.
A highly water-resistant nonwoven fabric can also be used. Examples of the highly water-resistant nonwoven fabric include SMS having water resistance of water resistance of 100 mmH ₂ O or more, and SMS imparted with water resistance by filling the microweb pores with microfibrillated cellulose (MFC) or wax. Can be mentioned. In this case, you may use independently and can also be used as a multilayer sheet | seat of a film and a highly water-resistant nonwoven fabric.

  The leak preventer 10 may be composed of a plurality of members.

  The leak preventer 10 has a sheet shape, and the shape thereof is not particularly limited as long as the absorber 12 and the like are accommodated in the upper portion and the head stretchable body 14 and the canal sheet 16 can be disposed.

  As the leak preventer 10, for example, a laminate of an SMS nonwoven fabric and a breathable PE film can be suitably used.

  The absorber 12 used in the present invention is not particularly limited as long as it can absorb bodily fluids, and an absorber used in a conventionally known absorbent article can be used. For example, a powdery absorber such as powdered wood pulp, unprocessed SAP, or a sheet-like absorber can be used.

The sheet-like absorbent body is excellent in form stability, possibility of preventing SAP from falling off, and the like.
Among the sheet-like absorbers, a super absorbent sheet containing SAP of 50% by mass or more, preferably 60% by mass or more, more preferably 70% by mass or more is preferable. In addition, the SAP content in the superabsorbent sheet is preferably 95% by mass or less from the viewpoint of the stability of the superabsorbent sheet.

The highly water-absorbent sheet is an ultrathin sheet-like absorbent body mainly composed of SAP. The superabsorbent sheet has a very small thickness because the SAP content is extremely high. The thickness of the superabsorbent sheet is preferably 1.5 mm or less, and more preferably 1 mm or less.
As long as the superabsorbent sheet is an ultra-thin sheet-like absorbent body mainly composed of SAP, the configuration and the production method are not particularly limited.
For example, a super absorbent sheet obtained by the Air Laid method can be mentioned. The Air Laid method is a method in which pulverized wood pulp and SAP are mixed, a binder is added, and the resultant is formed into a sheet shape to obtain a highly water-absorbent sheet. As a highly water-absorbent sheet obtained by this method, for example, NOVATHIN (registered trademark) manufactured by Rayonier in the United States and B-SAP manufactured by Oji Kinocross are known.
Moreover, the superabsorbent sheet obtained by the method of coating SAP dispersion | distribution slurry on body fluid permeable sheets, such as a nonwoven fabric, is also mentioned. Here, it is preferable that the SAP dispersion slurry is obtained by dispersing SAP and microfibrillated cellulose (MFC) in a mixed solvent of water and ethanol. As a highly water-absorbent sheet obtained by this method, MegaThin (registered trademark) manufactured by Japan Absorbent Technology Laboratory is known, for example.
In addition, for example, a superabsorbent sheet obtained by a method in which a large amount of SAP is supported on a raised nonwoven fabric and fixed with a hot melt binder, emulsion binder, aqueous fiber, etc., and fibrous SAP is mixed with PET (polyethylene terephthalate) fiber And a superabsorbent sheet obtained by a method of forming a web, and a SAP sheet in which the top and bottom of the SAP layer are sandwiched between tissues.

At least one layer of the absorber 12 is disposed on the top of the leak preventer 10. That is, the absorber 12 may be a single layer or two or more layers (multiple layers).
Moreover, the absorber 12 can also be arrange | positioned in the folded state.

  As the absorbent body 12, for example, a mixture of SAP and pulp (SAP / pulp = 60/40 (mass ratio)) is formed into a rectangular mat having a length of 350 mm in the front-rear direction and a width of 120 mm in the left-right direction. A sheet coated with paper can be suitably used.

  The absorbent article main body includes the leak preventer 10 and the absorber 12 described above, and may include other constituent members.

The leak preventer 10 is entirely covered with the surface sheet 13, and the upper side of the absorber 12 is also covered with the surface sheet 13.
As the surface sheet 13, for example, a liquid-permeable PP spunbond (for example, a basis weight of 13 g / m ² ) subjected to a hydrophilic treatment can be suitably used.

The pair of left and right head elastic bodies 14 are arranged from the front end in the front-rear direction of the absorbent article main body to the rear end through the front body F, the crotch C, and the rear end R, and the absorbent article main body and the front end And at the rear end. Specifically, the front end coupling portion 18 and the rear end coupling portion 20 are coupled. The bonding method is not particularly limited, and for example, bonding can be performed using a hot melt adhesive, heat seal bonding, or the like.
Here, the “absorbent article main body” means a leak preventer that is a member of the absorbent article, a top sheet that can be provided on the leak preventer, a surface sheet, and other various members that can be provided on the absorbent article. It is a collective term. The head stretchable body may be provided by being coupled to the leak preventer, may be provided by being coupled to a top sheet or other member provided on the leak preventer, and may be coupled to a plurality of members. It may be provided.

The pair of left and right head elastic bodies 14 are made of elastic yarn.
The elastic yarn is not particularly limited, and is, for example, a material exhibiting a thread shape such as a natural rubber yarn, a synthetic rubber yarn, a polyurethane filament, an elastic film segmented tape, or the like.
The elastic yarn is stretched by applying stress so that its length is in the range of, for example, about 1.2 to about 3 times. 10 to 10 can be used in parallel and fixed with a bonding agent such as an adhesive. When the stress is stopped, it shrinks and shortens.
As the pair of left and right head elastic bodies 14, for example, a structure in which four polyurethane filaments are arranged in parallel can be suitably used.
The pair of left and right head elastic bodies may be in a mode in which the elastic yarn exists from the front end portion to the rear end portion of the absorbent article main body. The elastic yarn is a part from the front end portion to the rear end portion (for example, near the front end portion and (Or the vicinity of the rear end) may not be present. In the case of the latter mode, for example, only a member that covers the pair of left and right head elastic bodies (for example, a sheet-like member made of a nonwoven fabric (may be an extension of a member constituting the canal sheet)) is an absorbent body. You may couple | bond with the articles | goods main body, the front-end part, and the rear-end part.

The canal sheet 16 is coupled at the upper surfaces of the left and right edge portions at a pair of left and right head stretchable bodies 14 and a joint portion 22 that extends over the entire length of the head stretchable body 14 in the front-rear direction.
The canal seat may exist over the entire length in the front-rear direction of the pair of left and right head elastic bodies 14, and a part of the pair of left and right head elastic bodies 14 in the front-rear direction (for example, the front end portion and / or the rear end portion). ) May be present in portions other than.
In the front body F, the crotch C, and the back body R, the canal sheet 16 is convex toward the surface of the absorbent body 12 below the head stretchable body 14 as shown in FIG. It is configured to hang down.

  The material of the canal sheet is not particularly limited. For example, PE, PP, PET, polyurethane, SBR rubber, PVA, EVA and other synthetic resin films, aperture sheets and net-like sheets; PE fibers, PP fibers, PET Spunmelt nonwoven fabrics typified by dry nonwoven fabrics, wet nonwoven fabrics, spunbond nonwoven fabrics, spunbond / meltblown / spunbond laminates comprising synthetic fibers such as fibers, PE / PP composite fibers and PE / PET composite fibers; wood pulp Preferable examples include dry nonwoven fabrics, wet nonwoven fabrics, and spunbonded nonwoven fabrics composed of hydrophilic fibers mainly composed of celluloses such as cotton, rayon, lyocell, and acetate.

  In the absorbent article 100, a part of the lower surface of the canal sheet 16 and the surface of the absorbent body 12 are coupled at the bottom surface coupling portion 24.

  The bottom surface coupling portion 24 is provided in a linear shape (band shape) from the vicinity of the rear end of the front body F through the crotch C to the vicinity of the front end of the rear body R at the center position in the left-right direction of the canal sheet 16. (See FIG. 1A). The method for bonding a part of the lower surface of the canal sheet 16 and the surface of the absorbent body 12 is not particularly limited, and for example, bonding can be performed using a hot melt adhesive, heat seal bonding, or the like.

In the absorbent article 100, as shown in FIG. 1C, the gap between the pair of left and right head elastic bodies 14 is an upper opening, the side of the canal sheet 16 near the left and right edges is the side, and the center in the left and right direction. A body fluid having a valley shape (also referred to as a V-shape or a U-shape) having a bottom surface coupling portion 24 in which the bottom surface is in the vicinity and the bottom surface of the bottom surface and the surface of the absorbent body 12 are coupled in a region including the crotch C. A receiving canal Ca is formed.
The body fluid receiving canal Ca in the absorbent article 100 has a narrow width in the left-right direction and a deep depth in the crotch part C, and a deep depth in the crotch part C. From the crotch C to the front body F and the back body R The width of the opening in the horizontal direction is gradually increased and the depth in the vertical direction is gradually reduced.

In the region having the bottom surface coupling portion 24, a plus sheet 26 that reinforces at least part of both side surfaces of the canal sheet 16 is joined, and the valley-shaped three-dimensional shape of the body fluid receiving canal Ca is stably maintained. More specifically, the plus sheet 26 is provided from the inner side of one of the left and right side surfaces of the canal sheet 16 to the inner side of the other through the upper side of the bottom surface.
The plus seat 26 is provided in a portion from the crotch C to the back body R in the front-rear direction.
The plus sheet 26 is folded at the left and right side edges and is coupled to the lower surface of the head telescopic body 14. Thereby, the head expansion-contraction body 14 is arrange | positioned in the state which the plus sheet | seat 26 supports from the bottom.
As the plus sheet 26, for example, a urethane foam (for example, a polyether flexible foam having a thickness of 3 mm is used) can be suitably used.

FIG. 2 is a schematic plan view of the plus sheet 26.
The plus sheet 26 is a rectangular sheet having a width W of 140 mm and a length L of 100 mm. The width W _{1 of the} folded portion is 15 mm on each of the left and right sides, and W ₂ is 110 mm. The plus sheet 26 is coupled to the canal sheet 16 over the entire length in the front-rear direction.

The plus sheet will be described in more detail.
The plus sheet reinforces at least a part of both side surfaces of the canal sheet in a region having a bottom surface coupling portion where the bottom surface of the bottom surface of the canal sheet and the surface of the absorber are coupled, and forms a valley-shaped three-dimensional body fluid receiving canal. The shape is stably maintained.

The arrangement of the plus sheet will be described.
The plus sheet only needs to reinforce at least a part of both side surfaces of the canal sheet.
For example, the plus sheet may be provided inside the left and right side surfaces of the canal sheet, or may be provided outside the left and right side surfaces of the canal sheet.
Further, the plus sheet may be provided from the left and right side surfaces to the bottom surface of the canal sheet, or may be provided only on both side surfaces.
Further, the plus sheet may be provided from one inner side of the left and right side surfaces of the canal sheet to the other inner side through the upper side of the bottom surface, and from the outer side of one of the left and right side surfaces of the canal sheet to the lower side of the bottom surface. It may be provided over the outside.
The arrangement of these plus sheets can also be used in combination as appropriate.

  In addition, the bottom joint portion extends from the crotch part to the front body, and the plus sheet extends from the crotch part of the canal seat to the front part, and the bottom joint part extends from the crotch part to the back body. In addition, the aspect in which the plus sheet extends from the crotch part of the canal sheet to the back body and the aspect in which both are combined are suitable aspects of the absorbent article of the present invention.

The material of the plus sheet will be described.
Since the plus sheet needs to reinforce both side surfaces of the canal sheet, the plus sheet preferably has an appropriate thickness and rigidity. In addition, when using the thin sheet | seat with small rigidity for a plus sheet | seat, it can also overlap | stack two or more sheets, and can couple | bond with both the inner side and the outer side of a canal sheet.

Typical materials that can be used as the plus sheet include, for example, films, nonwoven fabrics, foam sheets, composite sheets, and sheet-like absorbers.
Examples of films include films such as PE, PP, PET, EVA, and synthetic rubber; and films obtained by laminating these films. The films preferably have a thickness of 10 to 100 μm.
When using films with relatively low rigidity (for example, films made of simple substances such as PE, EVA, synthetic rubber, etc.), increasing the thickness or applying a bonding agent to the entire surface will increase the rigidity. Can be increased.

Nonwoven fabrics include, for example, cellulosic fibers such as rayon, lyocell, and cotton; and nonwoven fabrics made from synthetic fibers such as PE, PP, PET, EVA, and polyurethane. The nonwoven fabric preferably has a basis weight of 10 to 100 g / m ² .
When using non-woven fabrics with relatively low rigidity (for example, non-woven fabrics with fine fineness), the rigidity can be increased by increasing the thickness or applying a bonding agent to the entire surface.

  Examples of the foam sheets include foam sheets made of a resin such as PE, PP, polylactic acid, polystyrene, polyurethane, and synthetic rubber. The foamed sheet preferably has a thickness of 0.5 to 10 mm.

  Examples of the composite sheets include film / nonwoven fabric composite sheets and film / foam composite sheets. As the film, nonwoven fabric, and foam used in these, the above-described films, nonwoven fabrics, and foam sheets are preferably used.

Examples of the sheet-like absorber include a superabsorbent sheet (for example, B-SAP manufactured by Oji Kinocross Co., Ltd.) obtained by the above-described Air Laid method, and a dispersion slurry of the above-described SAP on a body fluid-permeable sheet such as a nonwoven fabric. And a superabsorbent sheet obtained by a coating method (for example, MegaThin (registered trademark) manufactured by Nippon Absorber Technology Laboratory Co., Ltd.). The sheet-like absorber is preferably relatively thin and flexible with an SAP content of 10 to 100 g / m ² .

  As materials used as these plus sheets, those subjected to embossing or creping in order to improve the surface condition and feel are also preferably used.

On the leak preventer 10, elastic yarns are arranged on both the left and right sides of the absorber 12 and fixed by being covered with the surface sheet 13, thereby constituting an outer leg gather (OLG) 28.
For example, three polyurethane filaments can be used as the elastic yarn. The elastic yarn has a pair of left and right OLGs outside the position where the pair of left and right head elastic bodies 14 are present in the left and right direction together with the leak preventer 10 and the surface sheet 13 that are sandwiched and fixed from above and below. Configure.
In this invention, OLG is not limited to this structure, For example, the structure of OLG used for a conventionally well-known absorber article can be used.

  Detachable members 30 are provided on the left and right sides near the rear end of the leak preventer 10. A detachable member (not shown) is provided on the lower surface near the front end of the leak preventer 10 so as to be detachable from the detachable member. These detachable members can be constituted by various surface fasteners, for example.

When the absorbent article 100 is worn, the part directly in contact with the wearer's skin is only the head stretchable body 14 that floats on both edges of the bodily fluid reception canal Ca. Are accommodated in openings between the head elastic bodies 14.
Therefore, when the wearer discharges urine, the entire amount of the discharged urine is first accommodated in the body fluid receiving canal Ca, and the urine is not directly discharged to the surface of the absorber 12.
The urine stored in the body fluid receiving canal Ca is then distributed and supplied from the body fluid outlet to the surface of the absorber 12.
In the absorbent article 100, in the body fluid receiving canal Ca, the outlet is not clearly shown, but the canal sheet 16 is made of a hydrophilic nonwoven fabric and is liquid permeable. It is an outlet for body fluids. Therefore, the urine stored in the bodily fluid reception canal Ca is then distributed and supplied to the surface of the absorber 12 through a large number of pores.
As the hydrophilic nonwoven fabric, for example, a spunbond nonwoven fabric made of PE / PP (for example, manufactured by Chisso Corp., basis weight 15 g / m ² ) treated with a hydrophilizing agent to impart liquid permeability is used. Can do.
Thus, it is one of the suitable aspects of this invention that a part or all of a canal sheet is comprised with the hydrophilic nonwoven fabric.

  As described above, the body fluid reception canal Ca allows the body fluid discharged from the wearer to be received and transferred to the absorber 12. Further, the body fluid moves in the body fluid receiving canal Ca and is distributed to the absorber 12 through the outlet of the body fluid receiving canal Ca.

When the absorbent article 100 is worn, not only for the first discharge of urine but also for the second and subsequent discharges, the entire amount of discharged urine is first accommodated in the body fluid receiving canal Ca, and the direct absorption body 12 It is not discharged to the surface.
Therefore, the body fluid receiving canal Ca becomes a barrier from the start of wearing to the end of wearing, and the skin of the wearer does not come into contact with the surface of the absorbent body 12 to wet the skin.

  In the absorbent article 100, the discharged bodily fluid is entirely received by the bodily fluid receiving canal Ca and temporarily stored, and then the canal sheet 16 is entirely liquid permeable. It exudes from 16 relatively wide areas and is supplied to the surface of the absorbent body 12. At this time, the body position, the discharge speed, the discharge amount, and the like are affected, but a relatively wide range portion of the absorbent body 12 can be used, and the load on the crotch C portion is greatly suppressed.

  When the wearer discharges stool, the liquid component in the stool moves from the pores of the canal sheet 16 to the surface of the absorbent body 12, but the solid component remains in the whole body fluid receiving canal Ca.

In the absorbent article 100, the plus sheet 26 is reinforced on both sides of the canal sheet 16, the deformation of the canal sheet 16 is suppressed, and the valley-shaped three-dimensional shape of the body fluid receiving canal Ca is stably maintained.
Therefore, the body fluid receiving canal Ca is not easily crushed, so that the separation distance between the wearer's skin and the surface of the absorber is sufficiently maintained, and the wearer's skin is reliably wetted by urine or the like present on the surface of the absorber. This prevents the occurrence of rash.
Further, since the contact state of the head stretchable body 14 with the skin of the wearer is stabilized, a gap between the head stretchable body 14 and the wearer's skin is less likely to be generated, and transmission leakage such as urine is effectively prevented. Is done.
Further, since the sag and buckling that occur in the vertical direction of the canal sheet 16 are less likely to occur, the body fluid receiving canal Ca is not subjected to a load, and the body fluid moving path existing inside the body fluid receiving canal Ca is not crushed and stable. Therefore, a smooth movement of the body fluid within the body fluid receiving canal Ca is maintained.
Furthermore, in the region centering on the crotch C of the bodily fluid reception canal Ca for receiving urine and feces, the width of the opening between the pair of left and right head elastic bodies 14 is easily secured, and the movement of the wearer Since the change in the width of the opening due to is suppressed, urine and feces can be stably accommodated.

Furthermore, by combining the surface characteristics of the canal sheet and the surface characteristics of the plus sheet, the state of movement of the body fluid in the body fluid receiving canal can be appropriately adjusted. For example, if the canal sheet is liquid permeable, make the plus sheet liquid impervious. If the canal sheet is liquid impermeable, make the plus sheet liquid permeable. The state of movement can be adjusted appropriately.
Thus, the aspect in which the canal sheet is liquid permeable and the plus sheet is liquid impermeable, and the aspect in which the canal sheet is liquid impermeable and the plus sheet is liquid permeable These are all suitable embodiments of the absorbent article of the present invention.

3 to 6 are schematic views showing various arrangement states of the plus sheet.
3 (A), FIG. 3 (C), FIG. 4 (A), FIG. 4 (C), FIG. 4 (E), FIG. 5 (A), FIG. 5 (C) and FIG. FIG. 3B is a lateral end view of the crotch portion when stress is not applied (in a relaxed state), and FIG. 3B, FIG. 3D, FIG. 4B, FIG. 4D, FIG. FIG. 5B, FIG. 5D, and FIG. 6B are development plan views in a state where they are drawn in the front-rear direction and the left-right direction, respectively, so that they are substantially flat.

The plus sheet 26a shown in FIGS. 3A and 3B has a canal sheet in a region having a bottom surface coupling portion 24a where the bottom surface of the bottom surface of the canal sheet 16a and the surface of the absorber 12a are coupled. A pair of left and right sides are provided inside the left and right side surfaces of 16a, and part of both side surfaces are reinforced. There is no plus sheet at the center in the left-right direction of the canal sheet 16a.
The bottom surface coupling portion 24a extends in a linear shape (band shape) from the vicinity of the rear end of the front body F through the crotch C to the front end of the rear body R at the center in the left-right direction where no plus sheet exists. The lower surface of 16a and the surface of absorber 12a are combined.
The plus sheet 26a is provided in the crotch part C of the canal sheet 16a.
The left and right edges of the canal sheet 16a are respectively coupled to the pair of left and right head elastic bodies 14a to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the canal sheet 16a, for example, a PE / PP spunbonded nonwoven fabric (for example, a basis weight of 15 g / m ² ) subjected to a hydrophilic treatment can be used.
As the pair of right and left plus sheets 26a, foam sheets are used, respectively. As the foam sheets, for example, a rectangular polyurethane foam (for example, a thickness of 2 mm) can be used.
The plus sheet 26a is bonded to the canal sheet 16a by, for example, applying a hot melt adhesive (for example, spray application) to the entire lower surface thereof.

  In this aspect, even when a load is applied to the canal sheet 16a from the head elastic body 14a side or the absorber 12a side at the time of wearing, the reinforcing effect by the plus sheet 26a (the rigidity and spring effect of the plus sheet 26a) ) Greatly suppresses deformation and sag of the canal sheet 16a. Further, when the weight is removed, the plus sheet 26a is immediately restored to the original shape, and the valley shape of the canal sheet 16a is maintained.

The plus sheet 26b shown in FIGS. 3 (C) and 3 (D) is basically the same as the plus sheet 26a shown in FIGS. 3 (A) and 3 (B), except for the canal sheet 16a. The location is different. That is, the plus sheet 26b is provided in a pair of left and right sides outside the left and right side surfaces of the canal sheet 16a in the region having the bottom surface coupling portion 24a where the bottom surface of the bottom surface of the canal sheet 16a and the surface of the absorber 12a are coupled. Part of both sides is reinforced. There is no plus sheet at the center in the left-right direction of the canal sheet 16a.
The bottom surface coupling portion 24a extends in a linear shape (band shape) from the vicinity of the rear end of the front body F through the crotch C to the front end of the rear body R at the center in the left-right direction where no plus sheet exists. The lower surface of 16a and the surface of absorber 12a are combined.
The plus sheet 26b is provided in the crotch part C of the canal sheet 16a.

As the pair of right and left plus sheets 26b, foam sheets are used, respectively. As the foam sheets, for example, a rectangular polyurethane foam (for example, a thickness of 2 mm) can be used.
The plus sheet 26b is bonded to the canal sheet 16a by, for example, applying a hot melt adhesive (for example, spray application) to the entire upper surface.

  In this aspect, even when a load is applied to the canal sheet 16a from the head elastic body 14a side or the absorbent body 12a side during wearing, the reinforcing effect by the plus sheet 26b (the rigidity and spring effect of the plus sheet 26b) ) Greatly suppresses deformation and sag of the canal sheet 16a. Further, when the weight is removed, the plus sheet 26b is immediately restored to the original shape and maintains the valley shape of the canal sheet 16a.

A mode of joining to the inner surface of the canal sheet such as the plus sheet 26a shown in FIG. 3 (A) and FIG. 3 (B), and the plus sheet 26b shown in FIG. 3 (C) and FIG. 3 (D). Such an aspect of bonding to the outer surface of the canal sheet can be selected as appropriate.
For example, when the canal sheet is liquid permeable and the plus sheet is liquid impermeable, the plus sheet is bonded to the outer surface of the canal sheet so as not to affect the reception and mobility of the body fluid in the body fluid receiving canal Ca. There are times when it is preferable to choose.
In addition, when the canal sheet is liquid-impermeable and the plus sheet is hydrophilic, the mode in which the plus sheet is bonded to the inner surface of the canal sheet is selected in order to utilize the hydrophilicity of the plus sheet for smooth movement of body fluid. There are times when it is preferable.

4 (A) and 4 (B), the plus sheet 26c has left and right side surfaces of the canal sheet 16a in a region where the bottom surface of the bottom surface of the canal sheet 16a and the surface of the absorber 12a have bottom surface coupling portions 24b. Is provided from one outer side to the other outer side through the lower side of the bottom surface to reinforce part of both side surfaces.
The bottom surface coupling portion 24b extends in a linear shape (band shape) in a region excluding the front end portion and the rear end portion from the front body F to the back body R through the crotch C at the center in the left-right direction.
The plus sheet 26c is provided from the vicinity of the rear end of the front body F of the canal sheet 16a to the vicinity of the front end of the rear body R through the crotch C.
Further, the bottom surface coupling portion 24b is coupled to the canal sheet 16a and the surface of the absorber 12a via the plus sheet 26c in the region where the plus sheet 26c exists, and to the lower surface of the canal sheet 16a in the region where the plus sheet 26c does not exist. The surface of the absorber 12a is directly bonded.
The left and right edges of the canal sheet 16a are respectively coupled to the pair of left and right head elastic bodies 14a to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the canal sheet 16a, for example, a PE / PP spunbonded nonwoven fabric (for example, a basis weight of 15 g / m ² ) subjected to a hydrophilic treatment can be used.
Films are used as the plus sheet 26c. As the films, for example, a relatively rigid PE film (for example, LLDPE) film (for example, a thickness of 40 μm) having a rectangular surface matting process can be used.
The plus sheet 26c is coupled to the canal sheet 16a by, for example, applying a hot melt adhesive (for example, spray coating) to the entire upper surface thereof.

In this aspect, even when a load is applied to the canal sheet 16a from the head elastic body 14a side or the absorbent body 12a side during wearing, due to the reinforcing effect by the plus sheet 26c (the rigidity of the plus sheet 26c), Deformation and sag of the canal sheet 16a is greatly suppressed. Further, when the weight is removed, the plus sheet 26c is immediately restored to the original shape, and the valley shape of the canal sheet 16a is maintained.
As described above, when a material that is relatively thin and has a small spring effect (cushion effect) is used as the plus seat 26c, it is preferable to increase the reinforcing effect by increasing the existence area in the front-rear direction.

The plus sheet 26d shown in FIGS. 4C and 4D is basically the same as the plus sheet 26c shown in FIGS. 4A and 4B, except for the material and the longitudinal direction. The arrangement of is different.
Foam sheets are used as the plus sheet 26d. As the foam sheets, for example, a rectangular polyurethane foam (for example, a thickness of 3 mm) can be used.
The plus sheet 26d is disposed in a region extending from the vicinity of the front end of the crotch part C to the vicinity of the front end of the back body R.

In this aspect, even when a load is applied to the canal sheet 16a from the head elastic body 14a side or the absorbent body 12a side during wearing, the reinforcing effect by the plus sheet 26d (the rigidity and spring effect of the plus sheet 26d) ) Greatly suppresses deformation and sag of the canal sheet 16a. Further, when the weight is removed, the plus sheet 26d is immediately restored to the original shape and maintains the valley shape of the canal sheet 16a.
As described above, when a material having a large spring effect (cushion effect) is used as the plus seat 26d, a sufficient reinforcing effect can be obtained even if the existence region in the front-rear direction is reduced.

The plus sheet 26e shown in FIGS. 4E and 4F is basically the same as the plus sheet 26d shown in FIGS. 4C and 4D, but the material is different.
A sheet-like absorber is used as the plus sheet 26e. As the sheet-like absorber, for example, a sheet-like absorber which is a pulp / SAP mixed sheet obtained by the Air Laid method (for example, an acrylic acid resin emulsion is spray-added to a mixture of pulp and SAP and dried under pressure. A material having a thickness of about 1 mm, a pulp basis weight of 100 g / m ² , a SAP basis weight of 50 g / m ² , and an acrylic resin basis weight of 5 g / m ² can be used.

In this aspect, even when a load is applied to the canal sheet 16a from the head telescopic body 14a side or the absorbent body 12a side during wearing, the reinforcing effect by the plus sheet 26e (the rigidity and spring effect of the plus sheet 26e) ) Greatly suppresses deformation and sag of the canal sheet 16a. When the weight is removed, the plus sheet 26e is immediately restored to the original shape, and the valley shape of the canal sheet 16a is maintained.
Thus, when a material having a large spring effect (cushion effect) is used as the plus seat 26e, a sufficient reinforcing effect can be obtained even if the presence region in the front-rear direction is reduced.

In this aspect, the following effects are further achieved.
A part of the body fluid that has passed through the canal sheet 16a is absorbed by the plus sheet 26e, and the transition to the absorbent body 12a is blocked. That is, the plus sheet 26e has an effect as if a leak preventer was used.
Even if the body fluid discharged inside the body fluid receiving canal Ca gets over the head telescopic body 14a and leaks, it travels outside the canal sheet 16a and is then absorbed by the plus sheet 26e. The That is, the plus sheet 26e also functions as a preliminary absorber.

The plus sheet 26f shown in FIG. 5A and FIG. 5B has left and right side surfaces of the canal sheet 16a in a region where the bottom surface of the bottom surface of the canal sheet 16a and the surface of the absorber 12a have bottom surface coupling portions 24c. It is provided from one inner side to the other inner side through the upper side of the bottom surface to reinforce part of both side surfaces.
The bottom surface coupling portion 24c extends linearly (band) from the vicinity of the rear end of the front body F through the crotch C to the front end of the rear body R at the center in the left-right direction, and absorbs the bottom surface of the canal sheet 16a. It binds to the surface of the body 12a.
The plus sheet 26f is provided from the vicinity of the rear end of the front body F of the canal sheet 16a to the vicinity of the front end of the rear body R through the crotch C.
The left and right edges of the canal sheet 16a are respectively coupled to the pair of left and right head elastic bodies 14a to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the canal sheet 16a, for example, a hydrophobic PP SMMS nonwoven fabric (for example, a basis weight of 15 g / m ² ) can be used.
Nonwoven fabrics are used as the plus sheet 26f. As the non-woven fabric, for example, a rectangular bulky and spun cotton spunlace non-woven fabric (for example, a basis weight of 50 g / m ² and an apparent specific gravity of 0.07 g / cm ³ ) can be used.
For example, the plus sheet 26f is bonded to the canal sheet 16a by applying a hot melt adhesive in a linear shape extending in the front-rear direction on the lower surface thereof.

  In this aspect, even when a load is applied to the canal sheet 16a from the head elastic body 14a side or the absorbent body 12a side at the time of wearing, the reinforcing effect by the plus sheet 26f (the rigidity and the spring effect of the plus sheet 26f) ) Greatly suppresses deformation and sag of the canal sheet 16a. Further, when the weight is removed, the plus sheet 26f immediately restores the original shape and maintains the valley shape of the canal sheet 16a.

The plus sheet 26g shown in FIGS. 5C and 5D is basically the same as the plus sheet 26f shown in FIGS. 5A and 5B, except for the material and the longitudinal direction. The arrangement of is different.
Foam sheets are used as the plus sheet 26g. As the foam sheets, for example, a rectangular hydrophilic polylactic acid resin sponge (for example, a thickness of 2.5 mm) having a width in the left-right direction longer than the length in the front-rear direction can be used.
In addition, the bottom surface coupling portion 24d extends linearly (band-like) over the entire area of the crotch portion C at the center in the left-right direction, and couples the lower surface of the canal sheet 16a and the surface of the absorber 12a.
The plus sheet 26g is provided from the back body R of the crotch C.

  In this aspect, even when a load is applied to the canal sheet 16a from the head telescopic body 14a side or the absorbent body 12a side during wearing, the reinforcing effect by the plus sheet 26g (the rigidity and spring effect of the plus sheet 26g) ) Greatly suppresses deformation and sag of the canal sheet 16a. Further, when the weight is removed, the plus sheet 26g immediately restores the original shape and maintains the valley shape of the canal sheet 16a.

The plus sheets 26h and 26i shown in FIGS. 6A and 6B have the plus sheet 26h in a region where the bottom surface of the bottom surface of the canal sheet 16a and the surface of the absorber 12a have the bottom surface coupling portion 24e. The canal sheet 16a is provided in a narrow range from one inner side of the left and right side surfaces to the other inner side through the upper side of the bottom surface, and the plus sheet 26i passes from the outer side of the left and right side surfaces of the canal sheet 16a to the lower side of the bottom surface. It is provided in a wide range over the outside, and part of both side surfaces are reinforced.
The bottom surface coupling portion 24e extends in a linear shape (band shape) in a region excluding the front end portion and the rear end portion from the front body F to the back body R through the crotch C at the center in the left-right direction.
The plus seat 26h is provided from the rear body R of the crotch C of the canal seat 16a, and the plus seat 26i extends from the vicinity of the rear end of the front body F of the canal seat 16a to the vicinity of the front end of the back body R through the crotch C. Is provided.
Further, the bottom surface coupling portion 24e connects the canal sheet 16a and the surface of the absorber 12a via the plus sheet 26i in the region where the plus sheet 26i exists, and the lower surface of the canal sheet 16a in the region where the plus sheet 26i does not exist. The surface of the absorber 12a is directly bonded.
The left and right edges of the canal sheet 16a are respectively coupled to the pair of left and right head elastic bodies 14a to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the canal sheet 16a, for example, a hydrophobic PP SMMS nonwoven fabric (for example, a basis weight of 15 g / m ² ) can be used.
Nonwoven fabrics are used as the plus sheet 26h. As the non-woven fabric, for example, a rectangular bulky and hydrophilic cotton spunlace non-woven fabric having a spring effect (for example, a basis weight of 30 g / m ² and an apparent specific gravity of 0.07 g / cm ³ ) can be used.
For example, the plus sheet 26h is bonded to the canal sheet 16a by applying a hot melt adhesive in a linear shape extending in the front-rear direction on the lower surface thereof.
Films are used as the plus sheet 26i. As the films, for example, a relatively rigid and liquid impervious PE (for example, LLDPE) film (for example, a thickness of 20 μm) having a rectangular surface matting process can be used. .
For example, the plus sheet 26i is bonded to the canal sheet 16a by, for example, applying a hot melt adhesive (for example, spray application) to the entire upper surface thereof.

  In this aspect, even when a load is applied to the canal sheet 16a from the head telescopic body 14a side or the absorbent body 12a side during wearing, the canal sheet is obtained by the synergistic reinforcing effect of the plus sheets 26h and 26i. The deformation and sag of 16a is greatly suppressed. Further, when the weight is removed, the plus sheets 26h and 26i are immediately restored to the original shape, and the valley shape of the canal sheet 16a is maintained.

  Hereinafter, embodiments of the absorbent article of the present invention will be shown, and the effects thereof will be further described.

FIG. 7 is a schematic view showing another example of the embodiment of the absorbent article of the present invention. FIG. 7 (A) is a developed plan view schematically showing a state (tensed state) in which the absorbent article is stressed and pulled in the front-rear direction and the left-right direction to be developed into a substantially flat shape. FIG. 7B is a lateral end view of the tensioned state along the line VIIB-VIIB in FIG. FIG. 7C is a lateral end view taken along the line VIIB-VIIB in FIG. 7A when stress is not applied to the absorbent article (in a relaxed state).
The absorbent article 101 shown in FIG. 7 is configured as a children's tape-type diaper (M size (for a weight of about 6 to 11 kg)).

The absorbent article 101 shown in FIG. 7 is basically the same as the absorbent article 100 shown in FIG. 1, but the material and arrangement of the plus sheet are different.
The pair of left and right head elastic bodies 14b is different from the head elastic body 14 in the absorbent article 100 in that the number of polyurethane filaments is three.
In the absorbent article 101, in a region where the bottom surface of the bottom surface of the canal sheet 16 and the surface of the absorber 12 have the bottom surface coupling portion 24f, the plus sheet 26j extends from the inside of one of the left and right side surfaces of the canal sheet 16 to the top side of the bottom surface. And the plus sheet 26k is provided in a pair of left and right sides outside the left and right side surfaces of the canal sheet 16, and part of both side surfaces are reinforced. There is no plus sheet at the center of the bottom surface of the canal sheet 16 in the left-right direction.
The bottom surface coupling portion 24f extends linearly (in a belt shape) in the region excluding the front end portion and the rear end portion from the front body F through the crotch C to the rear body R at the center in the left-right direction where no plus sheet exists. In addition, the lower surface of the canal sheet 16 and the surface of the absorber 12 are combined.
The plus seat 26j is provided from the rear body R of the crotch part C of the canal seat 16, and the plus seat 26k extends from the vicinity of the rear end of the front body F of the canal seat 16 to the vicinity of the front end of the rear body R through the crotch part C. Is provided.
The left and right edges of the canal sheet 16 are respectively coupled to the pair of left and right head elastic bodies 14b to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the canal sheet 16, a PE / PP spunbonded nonwoven fabric (weight per unit area 15 g / m ² , width in the left-right direction 130 mm) subjected to a hydrophilic treatment is used.
As the plus sheet 26j, a rectangular bulky and hydrophilic cotton spunlace nonwoven fabric having a spring effect (weight per unit area 50 g / m ² , apparent specific gravity 0.07 g / cm ³ ) is used.
The plus sheet 26j is bonded to the canal sheet 16 by applying a hot melt adhesive in a linear shape extending in the front-rear direction on the lower surface thereof.
As the pair of right and left plus sheets 26k, rectangular liquid-impermeable polyurethane foam (thickness 2 mm) is used.
The plus sheet 26k is bonded to the canal sheet 16 by spraying a hot melt adhesive on the entire upper surface.

  In this embodiment, even when a load is applied to the canal sheet 16 from the head elastic body 14b side or the absorbent body 12 side at the time of wearing, a synergistic reinforcing effect (plus sheet) by the plus sheets 26j and 26k. The deformation and sag of the canal seat 16 are greatly suppressed by the rigidity and the spring effect of 26j and 26k. Further, when the weight is removed, the plus sheets 26j and 26k are immediately restored to the original shape and the valley shape of the canal sheet 16 is maintained. Furthermore, even if a situation occurs such that the canal seat 16 is loaded from the head elastic body 14b side and the opening between the pair of left and right head elastic bodies 14b opens to the outside, The bulky nonwoven fabric surface comes into contact and a soft feel is maintained.

FIG. 8 is a schematic view showing still another example of the embodiment of the absorbent article of the present invention. FIG. 8A is a developed plan view schematically showing a state (tensed state) in which the absorbent article is stressed and pulled in the front-rear direction and the left-right direction to be developed and substantially flat. FIG. 8B is a lateral end view of the tensioned state along the line VIIIB-VIIIB in FIG. FIG. 8C is a lateral end view taken along line VIIIB-VIIIB in FIG. 8A when stress is not applied to the absorbent article (in a relaxed state).
The absorbent article 102 shown in FIG. 8 is configured as a children's tape-type diaper (M size (for a weight of about 6 to 11 kg)).

The absorbent article 102 shown in FIG. 8 is basically the same as the absorbent article 101 shown in FIG. 7, but the material and arrangement of the plus sheet are different.
In the absorbent article 102, in a region where the bottom surface of the bottom surface of the canal sheet 16 and the surface of the absorbent body 12 have the bottom surface coupling portion 24g, the plus sheet 26l is located below one of the left and right side surfaces of the canal sheet 16 from the outside of the bottom surface. It is provided over the other outer side through the side, and a part of both side surfaces is reinforced.
The bottom surface coupling portion 24g extends in a linear shape (band shape) in a region excluding the front end portion and the rear end portion from the front body F through the crotch C to the rear body R at the center in the left-right direction (long). 240 mm).
The plus sheet 26l is provided in the crotch part C of the canal sheet 16.
Further, the bottom surface coupling portion 24g is coupled to the bottom surface of the canal sheet 16 in the region where the plus sheet 26l is present, and the canal sheet 16 and the surface of the absorber 12 are coupled via the plus sheet 26l. The surface of the absorber 12 is directly bonded.
The left and right edges of the canal sheet 16 are respectively coupled to the pair of left and right head elastic bodies 14b to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

As the plus sheet 26l, a relatively rigid LLDPE film (thickness: 60 μm) subjected to rectangular surface matting is used.
The plus sheet 26 l is bonded to the canal sheet 16 a via the bonding layer 32 by spraying a hot melt adhesive on the entire upper surface.

  In the absorbent article 102, the plus sheet is a rectangular shape having a length of 90 mm in the front-rear direction and a width of 100 mm in the left-right direction with respect to the canal sheet 16 having a width of 130 mm in the left-right direction. The canal sheet 16 covers almost the entire left and right side surfaces.

  In this embodiment, even when a load is applied to the canal sheet 16 from the head telescopic body 14b side or the absorbent body 12 side when worn, the reinforcing effect of the plus sheet 26l (the rigidity and coupling of the plus sheet 26l) The deformation and sag of the canal sheet 16 are greatly suppressed by the rigidity of the layer 32. Further, when the weight is lost, the plus sheet 26l is immediately restored to the original shape, and the valley shape of the canal sheet 16 is maintained.

FIG. 9 is a schematic diagram illustrating an example of an embodiment of an absorbent article incorporating a connection sheet according to the prior art. Specifically, a connection sheet according to FIG. 3D of Patent Document 3 (Japanese Patent No. 5236122) is incorporated. FIG. 9 (A) is a developed plan view schematically showing a state (tensed state) in which the absorbent article is stressed and pulled in the front-rear direction and the left-right direction to be developed into a substantially flat shape. FIG. 9B is a lateral end view of the tensioned state along the line IXB-IXB in FIG. FIG. 9C is a lateral end view taken along line IXB-IX in FIG. 9A when stress is not applied to the absorbent article (in a relaxed state).
The absorbent article 103 shown in FIG. 9 is configured as a children's tape-type diaper (M size (for a weight of about 6 to 11 kg)).

The absorbent article 103 shown in FIG. 9 is basically the same as the absorbent article 101 shown in FIG. 7, but includes a connecting sheet 34 instead of the canal sheet and the plus sheet.
The connecting sheet 34 has a hydrophobic sheet 34 ″ disposed at the center in the left-right direction on the lower surface of the hydrophilic sheet 34 ′, and is bonded by applying a hot melt adhesive at a pair of linear connecting portions 36 extending in the front-rear direction. The connecting sheet 34 has a double structure at the center.
As the hydrophilic sheet 34 ′, a PE / PP spunbonded nonwoven fabric (weight per unit area 15 g / m ² , width in the left-right direction 130 mm) subjected to a hydrophilic treatment is used, which is the same as the canal sheet 16 in the absorbent article 101. Are the same.
As the hydrophobic sheet 34 ″, a hydrophobic PE film (thickness 20 μm, width 40 mm in the left-right direction) is used.
The bottom surface coupling portion 24h extends in a linear shape (band shape) in a region excluding the front end portion and the rear end portion from the front body F through the crotch C to the rear body R at the center in the left-right direction (long). 240 mm).
The hydrophobic sheet 34 ″ is provided in the whole area in the front-rear direction of the hydrophilic sheet 34 ′ (area from the front body F to the back body R through the crotch C).
Further, in the bottom surface coupling portion 24h, the hydrophilic sheet 34 ′ and the surface of the absorber 12 are coupled via the hydrophobic sheet 34 ″.
The left and right edges of the hydrophilic sheet 34 ′ are bonded to the pair of left and right head elastic bodies 14 b to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

In the absorbent article 103, the hydrophilic sheet 34 ′ and the hydrophobic sheet 34 ″ constituting the connecting sheet 34 are both highly flexible materials, and the hydrophilic sheet 34 ′ and the hydrophobic sheet 34 ″. Are only coupled by the pair of linear coupling portions 36, and therefore the connecting sheet 34 has low rigidity as a whole.
Therefore, in the absorbent article 103, when a load is applied to the canal sheet 16 from the head elastic body 14b side or the absorbent body 12 side at the time of wearing, the hydrophilic sheet 34 ′ is likely to be deformed or sag. The valley shape of the sheet 16 is not stably maintained.

FIG. 10 is a schematic view showing another example of an embodiment of an absorbent article incorporating a connection sheet according to the prior art. Specifically, a connection sheet according to FIG. 3C of Patent Document 3 (Japanese Patent No. 5236122) is incorporated. FIG. 10A is a developed plan view schematically showing a state (tensed state) in which the absorbent article is stressed and pulled in the front-rear direction and the left-right direction to be developed into a substantially flat shape. FIG. 10B is a lateral end view of the tensioned state along the line XB-XB in FIG. FIG. 10C is a lateral end view taken along line XB-X in FIG. 10A when stress is not applied to the absorbent article (in a relaxed state).
The absorbent article 104 shown in FIG. 10 is configured as a children's tape-type diaper (M size (for a weight of about 6 to 11 kg)).

The absorbent article 104 shown in FIG. 10 is basically the same as the absorbent article 103 shown in FIG. 9, but the mode of the connecting sheet is different.
The connecting sheet 34a has a hydrophobic sheet 34a ″ disposed in the center in the left-right direction on the upper surface of the hydrophilic sheet 34a ′, and is bonded by applying a hot melt adhesive at a pair of linear connecting portions 36a extending in the front-rear direction. The connecting sheet 34a has a double structure at the center.
As the hydrophilic sheet 34a ′, a PE / PP spunbonded nonwoven fabric (weight per unit area: 15 g / m ² , width in the left-right direction: 130 mm) subjected to a hydrophilization treatment is used, which is the canal sheet 16 in the absorbent article 101 and This is the same as the hydrophilic sheet 34 ′ in the absorbent article 103.
As the hydrophobic sheet 34a ″, a hydrophobic PE film (thickness 20 μm, lateral width 40 mm) is used, which is the same as the hydrophobic sheet 34 ″ in the absorbent article 103.
The bottom surface coupling portion 24i extends in a linear shape (band shape) in a region excluding the front end portion and the rear end portion from the front body F through the crotch C to the rear body R at the center in the left-right direction (long). 240 mm).
The hydrophobic sheet 34a ″ is provided in the entire front-rear direction of the hydrophilic sheet 34a ′ (region from the front body F to the back body R through the crotch C).
Further, in the bottom surface coupling portion 24i, the hydrophilic sheet 34a ′ and the surface of the absorber 12 are directly coupled.
The left and right edges of the hydrophilic sheet 34a ′ are respectively coupled to the pair of left and right head elastic bodies 14b to form a body fluid receiving canal Ca having a valley-shaped three-dimensional shape.

In the absorbent article 104, the hydrophilic sheet 34a ′ and the hydrophobic sheet 34a ″ constituting the connecting sheet 34a are both highly flexible materials, and the hydrophilic sheet 34a ′ and the hydrophobic sheet 34a ″ However, the connecting sheet 34a as a whole has low rigidity.
Therefore, in the absorbent article 104, when the canal sheet 16 is loaded from the head stretchable body 14b side or the absorbent body 12 side during wearing, the hydrophilic sheet 34a ′ is likely to be deformed or sag. The valley shape of the sheet 16 is not stably maintained.

As mentioned above, although the absorber article of the present invention was explained based on each embodiment of illustration, the present invention is not limited to these, for example, the composition of each part is arbitrary which can exhibit the same function Can be replaced with configuration.
Moreover, it can also be set as another embodiment by combining arbitrarily the structure of each part in each embodiment.

  The absorbent article of the present invention is suitably used for disposable diapers (for children and adults), incontinence products, training pants, feminine sanitary products, and the like.

Claims (10)

An absorbent article body having a sheet-like leak preventer and an absorber capable of absorbing bodily fluid disposed on at least one layer on the leak preventer,
A pair of left and right parts arranged from the front end portion in the front-rear direction of the absorbent article main body to the rear end portion through the front body, the crotch portion, and the rear body, and joined at the front end portion and the rear end portion. A head elastic body,
The left and right edges each have a canal sheet that is coupled to the pair of left and right head elastic bodies,
In the front body, the crotch part, and the back body, the canal sheet is configured to hang down in a convex shape toward the surface of the absorber below the head stretchable body, and the pair of left and right head stretchable bodies The gap between the upper and lower edges of the canal sheet is a side surface, and the vicinity of the center of the canal sheet in the left-right direction is the bottom surface.In the region including the crotch, the bottom surface of the bottom surface and the surface of the absorber An absorbent article in which a body fluid receiving canal having a valley-shaped three-dimensional shape having a bottom joint portion is formed,
In the region having the bottom surface coupling portion, a plus sheet that reinforces at least a part of both side surfaces of the canal sheet is joined so as not to exist in the central portion in the left-right direction, and the valley-shaped three-dimensional shape of the body fluid receiving canal Absorbent article that stably holds. An absorbent article body having a sheet-like leak preventer and an absorber capable of absorbing bodily fluid disposed on at least one layer on the leak preventer,
A pair of left and right parts arranged from the front end portion in the front-rear direction of the absorbent article main body to the rear end portion through the front body, the crotch portion, and the rear body, and joined at the front end portion and the rear end portion. A head elastic body,
The left and right edges each have a canal sheet that is coupled to the pair of left and right head elastic bodies,
  In the front body, the crotch part, and the back body, the canal sheet is configured to hang down in a convex shape toward the surface of the absorber below the head stretchable body, and the pair of left and right head stretchable bodies The gap between the upper and lower edges of the canal sheet is a side surface, and the vicinity of the center of the canal sheet in the left-right direction is the bottom surface.In the region including the crotch, the bottom surface of the bottom surface and the surface of the absorber An absorbent article in which a body fluid receiving canal having a valley-shaped three-dimensional shape having a bottom joint portion is formed,
In the region having the bottom surface coupling portion, a plus sheet that reinforces at least a part of both side surfaces of the canal sheet from one side to the other of the left and right parts coupled to the head extension body of the canal sheet in the left-right direction. An absorbent article which is joined so as to extend and stably retains the three-dimensional shape of the valley of the bodily fluid reception canal. The absorbent article according to claim 1 or 2, wherein the plus sheet is provided outside the right and left side surfaces of the canal sheet. The absorbent article according to any one of claims 1 to 3, wherein the plus sheet is provided inside the left and right side surfaces of the canal sheet. The absorber according to any one of claims 1 to 4, wherein the bottom surface coupling portion extends from the crotch part to the front body, and the plus sheet extends from the crotch part of the canal sheet to the front body. Goods. The absorber according to any one of claims 1 to 5, wherein the bottom surface coupling portion extends from the crotch part to the back body, and the plus sheet extends from the crotch part of the canal sheet to the back body. Goods. The absorbent article according to any one of claims 1 to 6, wherein the canal sheet is liquid-permeable and the plus sheet is liquid-impermeable. The absorbent article according to any one of claims 1 to 6, wherein the canal sheet is liquid-impermeable and the plus sheet is liquid-permeable. The absorbent article according to any one of claims 1 to 8, wherein the plus sheet is made of foam sheets. The absorbent article according to any one of claims 1 to 8, wherein the plus sheet is composed of a sheet-like absorber.

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