WO2016043314A1

WO2016043314A1 - Absorbent article and skin contact sheet

Info

Publication number: WO2016043314A1
Application number: PCT/JP2015/076695
Authority: WO
Inventors: 鈴木　磨; 好夫平井
Original assignee: 株式会社日本吸収体技術研究所
Priority date: 2014-09-19
Filing date: 2015-09-18
Publication date: 2016-03-24
Also published as: JP2016059673A

Abstract

A skin contact sheet (SCS) (17) is divided into side edge parts (15) which are shrinkable in both a right-to-left direction and a width direction and a main body sheet part (16), and the main body sheet part (16) is divided into liquid-impermeable parts (16B) respectively adjacent to the right and left side edge parts (15) and a liquid-permeable part (16A) positioned between the liquid-impermeable parts (16B). The SCS (17) is so configured that the main body sheet part (16) is hung down from the shrinkable side edge parts (15) toward the surface of an absorbent in a region including a crotch part (C), and an adsorbent-bonded part (13) at which the liquid-permeable part (16A) in the main body sheet part (16) is bonded to the surface of the adsorbent is provided in the region including the crotch part (C).

Description

Absorbent article and skin contact sheet

The present invention relates to an absorbent article and a skin contact sheet, and more particularly to an absorbent article and a skin contact sheet having a skin contact sheet.

An absorbent article is an article that absorbs body fluid discharged from a wearer with an absorbent. Examples of absorbent articles include diapers for children and adults, sanitary napkins, incontinence countermeasure products, and training pants. For example, a super absorbent resin (hereinafter also referred to as SAP (Super Absorbent Polymer)) or a fluffy wood pulp is used as the absorber.

In conventional absorbent articles, the discharged body fluid is discharged directly from the discharger to the surface of the absorber, and is absorbed by diffusion on the surface of the absorber and transfer from the surface of the absorber to the inside of the absorber. Absorbed and processed by the body.

Therefore, in order to prevent leakage from the absorbent article to the outside, the absorbent article is in close contact with the wearer's body so that there is no gap between the absorbent article and the skin surface of the wearer. In particular, it is required that the ejector be in close contact with the ejector. When the body fluid is discharged in such a situation, the wearer spends a long time in a state where the surface of the absorbent body wet with the body fluid is in contact with the skin. It is not only unpleasant for the wearer to spend body fluid in contact with the wearer's skin, but it may cause the skin to swell and cause bacterial growth, causing rashes and inflammation. It is also not preferable.

As one means for solving such a problem, a skin contact sheet (also referred to as an upper surface sheet or a second top sheet) that comes into contact with a further layer of skin through a gap above the absorber surface sheet (top sheet). It has been practiced to provide direct contact with the absorber surface. The concept of means for using a skin contact sheet (abbreviated as SCS after taking the acronym of Skin Contact Sheet) can be divided into the following two groups.

In the first group, the sheet material constituting the SCS is hydrophilic and liquid permeable. The discharged body fluid is first collected by the SCS that is always in contact with the body surface, and then the absorbent surface. By supplying body fluid to the sheet, more uniform body fluid treatment is performed by the cushion effect of this SCS, thereby aiming to reduce urine leakage and loose stool leakage. For example, Patent Document 1 and Patent Document 2 It is proposed in

In the second group, in order to eliminate the above disadvantages, the SCS is changed to a hydrophobic, liquid-impermeable material, and a dedicated urine opening and a stool opening through which urine and feces permeate are provided. The aim is to separate the stool, which is proposed in Patent Documents 3 to 8, for example.

JP-A-3-231664 JP-A-3-234257 JP 2002-11044 A JP 2002-143217 A JP 2002-204811 A JP 2007-190315 A JP 2007-236911 A Japanese Patent No. 5101753

The problems of the concept of the first group are as follows: (1) Since the entire surface of the SCS is always in contact with the body surface, it is inevitable that the SCS gets wet and body fluid adheres to the body surface at the same time. Therefore, the occurrence of rash cannot be prevented, and (2) urine leakage due to permeation and exudation of body fluid from top to bottom and from side to side with the hydrophilicity of SCS.

The problems of the concept of the second group are (1) that the structure is complicated, the number of materials used is increased, the manufacturing process is expensive, the cost of the product is increased, and (2) the urine opening Body fluid that cannot pass through the stool opening is attached to the body because there is no place to escape.

An absorbent article according to the present invention includes a sheet-shaped leak preventer that prevents leakage of bodily fluids, and an absorbent article that is disposed at an upper part of the leak preventer and can absorb bodily fluids. The body,
On the upper part of the absorbent body, from the front end part in the length direction of the absorbent article main body, through the front body, the crotch part and the back body part, the skin contact sheet is disposed,
An absorbent article comprising:
The skin contact sheet has a stretchable side edge portion provided at each of left and right end portions, and a main body sheet portion joined to the stretchable side edge portion of the left and right end portions,
The front end portion and the rear end portion of the skin contact sheet are respectively joined to the front end portion and the rear end portion of the absorbent article main body,
The main body sheet portion is composed of a liquid impermeable portion adjacent to each of the stretchable side edges of the left and right end portions, and a liquid permeable portion disposed between the liquid impermeable portions,
In the region including the crotch, the main body sheet portion is configured to hang down from the stretchable side edge toward the absorber surface,
In the region including the crotch part, the absorbent article has an absorbent joint part in which a part of the liquid permeable portion of the main body sheet part and a part of the surface of the absorbent body are joined to each other.

The skin contact sheet according to the present invention is used for the absorbent article.

According to the present invention, contact between the absorber surface and the wearer's skin can be effectively avoided.

It is a figure which illustrates the structure of typical embodiment of the absorbent article of this invention. It is a horizontal end surface of the basic concept of SCS of the absorbent article of this embodiment. It is a schematic diagram which shows the specific example of SCS of the absorber article | item of this embodiment. It is a cross-sectional schematic diagram of right and left explaining the presence state of the liquid impermeable part and liquid permeable part of SCS. It is a cross-sectional schematic diagram of the left-right direction which shows the multilayered state of the side part of SCS. It is a figure which shows other embodiment of the absorber article | item of this invention which has SCS provided with the side part of a multilayered state. It is a figure which shows other embodiment of the absorber article | item of this invention which has SCS provided with the side part of a multilayered state. It is a figure which shows the example of the aspect which joined the shape maintenance material to the main body sheet | seat part of SCS. It is a figure which shows other embodiment of the absorber article | item of this invention at the time of joining a shape maintenance material to the main body sheet | seat part of SCS. It is a figure which shows other embodiment of the absorber article | item of this invention at the time of joining a shape maintenance material to the main body sheet | seat part of SCS. It is explanatory drawing which shows the effect of the absorber article | item of each embodiment of this invention mentioned above.

Hereinafter, the absorbent article of the present invention will be described in detail based on an embodiment 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.

Further, in the present specification, the “absorber” means that the absorber is covered with any one of a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), a core wrap sheet, or a plurality of sheets. In this case, the sheet includes a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), a core wrap sheet, a plurality of sheets, or the like, which is covered, and is referred to as an absorber. The “absorber surface” means the surface of the absorber when it is exposed. The absorber is one of a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), and a core wrap sheet. When covered with a sheet or a plurality of sheets, it means the surface of any sheet or the surface of the uppermost sheet among the plurality of sheets. The absorbent article main body includes a sheet-like leak preventer that prevents leakage of bodily fluids, and an absorber that is disposed on the top of the leak preventer and can absorb bodily fluids. The absorbent body of the absorbent article main body is covered when the absorbent body is covered with a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), a sheet of a core wrap sheet, or a plurality of sheets. It means an absorbent body including any one of a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), a core wrap sheet, or a plurality of sheets.

Similarly, the “surface of the leak preventer” means the surface when the leak preventer is exposed, and the leak preventer is either the surface sheet (top sheet), the core wrap sheet or both. When covered with a sheet or the like, it means the surface of one of the sheets or the surface of the uppermost sheet of both sheets.

FIG. 1 illustrates the configuration of a typical embodiment of an absorbent article according to the present invention. FIG. 1A is a developed plan view schematically showing a diaper in a tension state in which a tape-type diaper is extended in the front-rear and left-right directions. FIG. 1 (B) is a lateral end view showing the IB-IB portion corresponding to the crotch part C of FIG. 1 (A) in a tensioned state. FIG. 1 (C) shows the same IB-IB site as FIG. 1 (B) corresponding to the crotch C of FIG. 1 (A), but relaxes the tension in FIG. It is a horizontal end view which shows a state when it becomes a convex three-dimensional structure. The following description will be given with respect to the main part of the absorbent article, and the other components will be described in specific examples described later. The crotch part expressed in the description of the present embodiment and each embodiment described later means a part also expressed as a crotch part, in the case of a man covering the anus from the penis, in the case of a woman from the labia It means the part covering the anus.

The absorbent article according to the present embodiment includes a sheet-shaped leak preventer, an absorber capable of absorbing bodily fluids arranged at least one layer above the leak preventer, and SCS as essential constituent members, and other constituent members are necessary. It is provided according to. SCS has the basic feature of SCS that most of its structure is lifted from the absorber surface, and at the same time, it has a fixed part with the absorber surface at the crotch and forms a stable valley-shaped three-dimensional structure. Thus, an absorbent article that can effectively avoid contact between the surface of the absorbent body and the wearer's skin at the crotch, and specifically has the following characteristics. That is,
(1) The SCS is divided into a side edge portion and a main body sheet portion that are stretchable in the lateral width direction.
(2) The SCS is further divided into a liquid-impermeable portion between the liquid-impermeable portion and the liquid-impermeable portion where the main body sheet portion is adjacent to the left and right side edge portions.
(3) SCS is an area including the crotch part, and the main body sheet portion is configured to hang down from the stretchable side edge toward the absorber surface.
(4) The SCS includes an absorber joint portion in which a part of the liquid permeable portion of the main body sheet portion and a part of the absorber surface are joined to a region including the crotch portion.

In the SCS of the absorbent article according to the present embodiment, it is desirable to increase the width of the main body sheet portion of the crotch portion so that the three-dimensional state of the crotch portion ensures a sufficient depth and width. Therefore, a folded state (multiple state) is formed on the side part of the SCS so that the folded state is fixed at the front end and the rear end so that it cannot be widened. Thus, it is desirable to form a convex three-dimensional state in a fully extended state.

Furthermore, in order for the SCS of the embodiment to exert more effects, it is desirable to join a shape retaining material to the main body sheet portion in the region including the crotch part and stabilize the convex three-dimensional state below the crotch part.

1 includes an absorbent article main body 40 and a skin contact sheet (SCS) 17. The absorbent article main body 40 includes a sheet-like leak preventer 10 that prevents leakage of bodily fluids, an absorber 11 that can absorb bodily fluids disposed on at least one layer of the leak preventer 10, and a surface sheet (top sheet). Twelve. The skin contact sheet (SCS) 17 is arranged on the upper part of the absorbent body 11 from the front end part in the length direction of the absorbent article main body to the rear end part through the front body, the crotch part, and the back body. As described above, in the present specification, the term “absorber” refers to an absorber including a coated surface sheet (top sheet) when the absorber is coated with a surface sheet (top sheet). However, for convenience of explanation, in FIGS. 1 to 11 and the description thereof, the absorber 11 is described separately from the surface sheet (top sheet) 12. That is, the absorber 11 is an absorber excluding the surface sheet (top sheet).

The SCS 17 has a stretchable side edge 15 at the left and right end portions and a main body sheet portion 16 joined to the stretchable side edge 15 at the left and right end portions, and the front end portion and the rear end portion of the SCS 17 are absorbent articles. Joined to the vicinity of the front end and the vicinity of the rear end of the main body. The main body sheet portion 16 includes a liquid impermeable portion 16B adjacent to the stretchable side edge 15 at the left and right end portions, and a liquid permeable portion 16A between the liquid impermeable portions, and the front end joining portion 18 and the rear end. In the joint portion 19, the stretchable side edge portion 15 and the main body sheet portion 16 are integrally joined, and in a region including the crotch portion, the main body sheet portion 16 extends from the stretchable side edge portion 15 to the absorber surface (here, the surface sheet ( The top sheet is configured so that the entire surface extends toward the surface) and hangs down. The liquid permeable portion 16A and the liquid impermeable portion 16B are joined by a joint portion 22. In the region including the crotch portion, a part of the liquid permeable portion of the main body sheet portion 16 and a part of the absorber surface have the absorber joint portion 13 that is joined to each other. The cross-sectional shape of the direction has a convex three-dimensional structure on the lower side having an upper opening composed of left and right edges of the SCS 17, left and right side surfaces composed of the main body sheet portion 16, and a bottom surface. Here, the absorber joint portion 13 is provided in a continuous line shape or a strip shape, but a plurality of the absorber joint portions 13 may be provided discontinuously in a line shape or a strip shape. The absorber joint portion 13 is a portion that joins a part of the liquid-permeable portion of the main body sheet portion 16 and a part of the absorber surface by hot melt adhesive, heat fusion, or the like.

The length of the absorber joint 13 is preferably in the range of 5% to 60%, more preferably 10% to 40% of the length of the SCS. The width of the absorbent joint portion 13 is preferably 0.5 to 2 mm when provided in a linear shape, and 2 mm to 2 cm or less when provided in a strip shape. In this embodiment, the absorber joint 13 includes the crotch C and is formed to extend to the front body F and the back body R. However, the absorber joint 13 does not extend to the back body R. It may be formed to extend from the crotch C to the front body F, or may be formed to extend from the crotch to the back body R without extending to the front body F. Further, the absorber joint portion 13 may be arranged in the crotch part C so as to be the same length as the crotch part C or shorter than the length of the crotch part C. In each embodiment to be described later, an example in which the absorber joint portion is arranged in the crotch C so as to be the same length as the crotch C or shorter than the length of the crotch C is shown. The arrangement and length of the parts may be set in the same manner as in this embodiment. In order for the absorber joint 13 to be in a state in which the SCS is widened to the limit at the crotch C and fully stretched, it is preferable that the absorbent joint 13 be concentrated on the crotch C so that the pulling force is concentrated on the crotch.

The material of the leak preventer 10 used in the present embodiment can be generally used as a back sheet. Specifically, for example, a body fluid impermeable sheet such as a resin film of PE, PP, PET, EVA, or the like; a foamed sheet of a resin such as PE, PP, PET, EVA, or the like can be used. As the body fluid-impermeable sheet, a breathable film such as a breathable film is also preferably used.

Also, when a resin film is used for the leak preventer 10, it can be used as a multilayer sheet of film and nonwoven fabric in order to improve the feel and appearance. In this case, SB, SMS, a spot bond nonwoven fabric, etc. with a comparatively low basis weight are suitably used as the nonwoven fabric.

Also, the leak preventer 10 can be made of a highly water resistant non-woven fabric that has been subjected to a water resistance treatment. The leak preventer 10 can also be a multilayer sheet of a resin film or a highly water-resistant non-woven fabric and a sheet-like absorber described later.

Leak preventer 10 may be composed of a plurality of members. The shape of the leak preventer 10 is not particularly limited as long as it is a sheet.

The absorber 11 used in the present embodiment is not particularly limited as long as it can absorb body fluid, and an absorber used in a conventionally known absorbent article can be used. For example, fluffy wood pulp, powdery or flaky absorbers such as SAP, and sheet-like absorbers can be used.

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

The superabsorbent sheet has an extremely high SAP content, so the thickness is extremely thin. The thickness of the superabsorbent sheet is preferably 1.5 mm, and more preferably 1 mm or less.

The configuration and the manufacturing method are not particularly limited as long as the superabsorbent sheet is a sheet-like absorber mainly composed of SAP. For example, a superabsorbent sheet obtained by an air raid method in which pulverized wood pulp and SAP are mixed in an air stream and a binder is added to form into a sheet shape can be mentioned. Moreover, the superabsorbent sheet obtained by the method of coating the SAP dispersion slurry on a sheet such as a nonwoven fabric is also mentioned.

In addition, for example, a high-absorbency sheet obtained by a method in which a large amount of SAP is supported between base fibers of a bulky raised nonwoven fabric, and the SAP is fixed with a binder such as hot melt, a fibrous SAP is chemically treated. Examples thereof include a superabsorbent sheet obtained by a method of mixing with fibers and synthetic fibers and forming into a web shape, and a superabsorbent sheet obtained by a method of covering the upper and lower sides of the SAP layer with a nonwoven fabric.

The absorber 11 is disposed at least one layer above the leak preventer 10. That is, the absorber 11 may be a single layer or two or more layers (multiple layers).

Also, the absorber 11 can be arranged in a folded state.

In this embodiment, since the surface sheet (top sheet) covers the absorber 11, the surface sheet and the SCS are joined. However, if the absorber 11 is exposed, the upper surface of the absorber 11 and the SCS are joined. If the surface of the absorber 11 is covered with any sheet or a plurality of sheets of a diffusion sheet, an acquisition sheet, a surface sheet (top sheet), and a core wrap sheet, the surface of any sheet or a plurality of sheets The upper surface of the uppermost sheet and the SCS are joined together.

The SCS of this embodiment has a stretchable side edge 15 and a main body sheet 16 joined to both side edges.

The stretchable side edge 15 is present at the left and right ends of the SCS and plays a role of maintaining a constant contact state with the wearer's skin when worn.

First, the SCS of the absorbent article according to this embodiment will be described with reference to FIGS. FIG. 2 schematically shows a lateral end face of the basic concept of the SCS, FIG. 3 is a specific example of the SCS, FIG. 3A is a schematic plan view, and FIG. 3B is a schematic cross-sectional view. Indicated. Both FIG. 2 and FIG. 3 are schematic views of the state of being widened and elongated under tension. 2 and 3, the stretchable side edge 15 disposed on the left is defined as the stretchable side edge 15L, and the stretchable side edge 15 disposed on the right is defined as the stretchable side edge 15R. The liquid-impermeable portion 16 is a liquid-impermeable portion 16BL, and the liquid-impermeable portion 16 arranged on the right is a liquid-impermeable portion 16BR.

The SCS of the present embodiment is composed of stretchable side edges 15L, 15R provided on the left and right sides, and a main body sheet portion 16 joined to the left and right stretchable side edges 15L, 15R. It consists of liquid-impermeable portions 16BL, 16BR adjacent to the left and right stretchable side edges 15L, 15R, and a liquid-permeable portion 16A located between the liquid-impermeable portions.

The

stretchable side edges

15L and 15R are generally liquid-impermeable because the stretchable body 15A usually uses a hydrophobic material, and the stretchable body 15A is often covered with a hydrophobic nonwoven fabric. .
FIG. 3A is a schematic plan view showing the structure of the SCS. The SCS is composed of a stretchable side edge portion and a main body sheet portion in which three elastic yarns arranged from the front body to the back body are covered with a SB nonwoven fabric made of PE / PP. The total width W ₀ of the SCS is the total width 2 × W ₁ of the left liquid-impermeable portion 16BL and the left elastic side edge 15L, and the right liquid-impermeable portion 16BR and the elastic side edge 15R. If, comprising left and right liquid-impermeable portion 16BL, body seat portion of the liquid-permeable portion 16A width _{W 2} Metropolitan of which is provided between the 16br. Width W ₁ is the width of the liquid-impermeable portions elasticized side edges. The liquid-impervious portions of the left and right stretchable side edges and the left and right main body sheet portions are both made of PE / PP SB nonwoven fabric, and the liquid-permeable portion of the main body sheet portion is the surface of the PE / PP SB nonwoven fabric. It is formed by subjecting to a hydrophilic treatment.

This will be described in more detail with reference to the cross-sectional schematic view of IIIB-IIIB in FIG. Width W ₁ of the left liquid-impermeable portion of the SCS elasticized side edge from the left edge of the stretchable side edges, the width of the left edge of the liquid-permeable portion. The width W ₁ of the right liquid impermeable portion and the stretchable side edge is the width from the right end of the stretchable side edge to the right end of the liquid permeable portion. The width W ₂ of the liquid-permeable portion is the width from the right edge of the left side of the liquid-impermeable portions and the left edge of the right liquid-impermeable portion. Here, when W ₀ = 100%, the range is set to approximately W ₁ = 20 to 40% (40 to 80% in total on the left and right) and W ₂ = 20 to 60%. In addition, most of the material which comprises the side part which is folded and is multilayered later mentioned is comprised from the liquid-impermeable part and elastic | stretch side edge part of a main body sheet | seat part.

The stretchable side edge 15 is composed of a stretchable member and a base material (also referred to as a covering material), and the stretchable member has stretch elasticity, and is stretched when worn and comes into close contact with the wearer's skin. Those with properties are selected. For example, elastic films, elastic yarns, elastic nets, elastic foams, and composites thereof. The elastic film is, for example, natural rubber, synthetic rubber, polyurethane, etc., which is a relatively thin film equivalent to 10-50 μm slitted into a tape or band, and these are about 1.2 times (20%) to It is stretched within a range of 3.0 times (200%) and used as it is in a tension state, or it is used by joining and covering a thin non-woven fabric. When tension is eased, it contracts and shortens. The elastic yarn is, for example, natural rubber yarn, synthetic rubber yarn, polyurethane filament, or a material obtained by subdividing the elastic film into a thread shape, which is about 1.4 times (40%) to 4.0 times (300%). And at least two, preferably 3 to 10 in parallel, and joined and fixed with an adhesive or the like. When tension is eased, it contracts and shortens. The elastic net is, for example, a net formed by knitting elastic yarn, an elastic film formed into a net shape by split yarn formation, and the like, and is used in the same manner as a film. The elastic foam is, for example, a bulky, stretchable sheet having a thickness of approximately 1 mm to 10 mm, such as PE resin foam, PP resin foam, EVA foam, polyurethane foam, and the like, which is processed into a strip or tape. It stretches in the range of about 1.1 times (10%) to 2.0 times (100%), and is used as it is in a tension state, or it is used by joining and covering a thin non-woven fabric. When tension is eased, it contracts and shortens. Even when the elastic foam is in a low stretched state, high cushioning properties are utilized, and the elastic foam comes into close contact with the wearer's skin.

Since the main body sheet portion is composed of a liquid-impermeable portion adjacent to the left and right stretchable side edges and a liquid-permeable portion located between the liquid-impermeable portions, each will be described.

The material constituting the liquid-impermeable portion is not particularly limited as long as it is a liquid-impermeable, thin, and flexible sheet. For example, the following five groups are (1) PE, PP, PET, polyurethane, Synthetic resin films such as EVA, (2) Natural rubber, thinned sheet of synthetic rubber, (3) Sheet made of thinned foam such as PE resin foam, PP resin foam, EVA foam, polyurethane foam, (4 ) For dry nonwoven fabrics, wet nonwoven fabrics, spunbond nonwoven fabrics and spunbond / meltblown / spunbond laminates comprising synthetic fibers such as PE fibers, PP fibers, RET fibers, PE / PP composite fibers, and PE / PET composite fibers. Preferred examples include hydrophobic non-woven fabrics such as spun melt non-woven fabrics, and (5) composite sheets of the non-woven fabrics and the films.

The material constituting the liquid-permeable portion is not particularly limited as long as it is a liquid-permeable, thin and flexible sheet. For example, the following four groups are used: (1) Wood pulp, cotton, rayon, lyocell, etc. Hydrophilic dry non-woven fabric, wet non-woven fabric comprising cellulose fibers as constituents, (2) dry type comprising synthetic fibers such as PE fibers, PP fibers, RET fibers, PE / PP composite fibers, PE / PET composite fibers, etc. Nonwoven fabrics such as nonwoven fabrics, wet nonwoven fabrics, spunbond nonwoven fabrics and spunmelt nonwoven fabrics such as spunbond / meltblown / spunbond laminates. Preferable examples include a sheet provided with pores to impart liquid permeability, and (4) a sheet imparted with liquid permeability to a synthetic resin net.

Hereinafter, with reference to FIG. 1, an example of an M-size tape type diaper for children, which is a specific example of the absorbent article, will be described. The diaper 100 in FIG. 1 (A) is formed into an hourglass shape on a sheet-shaped leak preventer 10 (in this example, a 15 μm breathable PE film laminated with a 13 g / m ² PP SMS nonwoven fabric). The absorbent body 11 (in this example, an SAP / pulp mixed mat containing SAP 8 g and pulp 12 g and coated with 15 g / m ² tissue paper) is used. It has an absorbent article body 40 whose side is covered with a surface sheet 12 (in this example, a 20 g / m ² PE / PET fiber air-through nonwoven fabric hydrophilized), and a skin contact sheet (SCS) 17 above the absorbent article body 40. Is arranged. The SCS 17 has a stretchable side edge 15 and a main body sheet portion 16 and is arranged from the front body F to the back body R through the crotch C, the absorbent article main body (surface is the surface sheet 12), the front end joint 18, and the rear. The end joint 19 and the absorber joint 13 are joined at three points. An outer leg gather (OLG) 14 is provided outside the absorber 11. The OLD 14 prevents leakage of body fluid from the side of the absorbent article (side leakage), and is provided with a stretch sheet (stretch body) sandwiched from both sides by a surface sheet and a leak preventer, and is usually flat. In some cases, it is folded inward and used in a standing shape. The OLG 14 may be disposed only at the crotch.

Elasticized side edges 15 and the liquid-impermeable portions 16B of the SCS17 (W ₁ described in FIG. 3) is formed on the side portions became three layers folded onto the main seat portion 16, the liquid-permeable The central portion (W ₂ portion described with reference to FIG. 3), which is a portion, forms a center portion composed of one layer. The presence state of the SCS 17 will be described in more detail with reference to FIGS. 1B and 1C. The absorbent article main body and the SCS 17 are sealed at the front end joint portion 18 and the rear end joint portion 19 with the full width from the left end to the right end, and the side portions are joined and fixed so that the three-layer folded state cannot be widened. The absorber joint 13 is a band-like joint portion extending in the region including the crotch C and extending before and after the one-layer liquid-permeable portion and the absorber surface (surface of the surface sheet 12) are joined to the center of the center portion. Exists as.

The stretchable side edge 15 is formed by coating three elastic yarns with a nonwoven fabric (in this example, 600 dtex polyurethane filaments are stretched 2.0 times, and the three filaments are arranged in parallel at intervals of 4 mm, The same non-woven fabric as the liquid-impermeable portion of the main body sheet portion 16 is bonded and coated with an adhesive) and is folded on the main body sheet portion 16.

The main body sheet portion 16 includes left and right liquid-impermeable nonwoven fabrics 16B (in this example, a liquid-impermeable PP SMS nonwoven fabric having a basis weight of 15 g / m ² ), and a liquid-permeable nonwoven fabric in the central portion sandwiched between them. 16A (in this example, a PE / PP spunbond nonwoven fabric having a surface weight of 20 g / m ² and having a surface hydrophilization treatment) is used. The body sheet part 16 is provided with a slit-like body fluid transition outlet (slit) 20 at the front body part, and the body fluid (urine) received in the body sheet part 16 smoothly moves to the surface of the absorber 11, Overflow from the front end of the main body sheet portion 16 is prevented. The transition outlet 20 may be provided in the back body part, or may be provided in both the front body part and the back body part. The detachable material 21 is provided on the side part of the back body and is detachably attached to the front body when worn.

FIG. 1 (B) is a schematic diagram of the IB-IB lateral end surface of FIG. 1 (A), illustrating the state of the crotch C and the tension state. As shown in the figure, the stretchable side edge 15 and the liquid-impermeable portion 16B of the main body sheet portion 16 adjacent to the SCS are folded, and the edge of the liquid-permeable portion 16A of the main body sheet portion 16 is folded at the edge. It is formed of a part (side part) that is joined and tripled and a liquid-permeable one-layer part (center part) that forms the central part. The main body sheet portion 16 is joined to the absorber surface (surface sheet surface) and the absorber joint portion 13 at the center portion in the width direction of the center portion. The folded side portions of the three side portions are joined up and down while being folded at the front end portion and the rear end portion, and joined to the absorbent article main body so that they cannot be widened. Therefore, in the vicinity of the front end portion and the rear end portion, the lateral width of the SCS is short and is joined to the absorbent article main body, so that almost the entire surface in the width direction is in contact with the skin at this portion. On the other hand, in the crotch part C, the main body sheet portion 16 is pulled by the absorber joint portion 13, so that the three layers of “folding” of the side portion are unfolded, stretched out, widened, and the entire main body sheet portion is one layer. The width of the SCS becomes the longest. In the front body F and the back body R, the “folded state” and the “unfolded state” coexist, and the front body F and the back body R are stretched or folded depending on the movement and posture of the wearer.

FIG. 1 (C) illustrates the state of the crotch part C that has been released from the tension state of FIG. In the crotch portion C, the liquid-impermeable portion 16B of the side portion that has been folded in a triple state in a stretched state extends, and the entire body sheet portion 16 becomes a single layer to increase the width, and the liquid-impermeable portion 16B and liquid The main body sheet portion 16 composed of the permeable portion 16A hangs down from the stretchable side edge portion 15 and exhibits a deep U-shaped valley-like three-dimensional shape that is convex downward.

By concentrating and arranging such a three-dimensional structure having a large space volume and projecting downward in the crotch C where the body fluid discharger exists, all the body fluid discharged from the discharger is accommodated in this SCS. I can do it. The absorbent article according to the present embodiment does not have a structure in which body fluid is directly discharged to the surface of the absorbent body as in the conventional absorbent article, and the entire amount of body fluid that is temporarily discharged from the discharger passes through the SCS. , SCS exhibits a buffer effect that equalizes the amount of discharge over time, and at the same time can improve the efficiency of use of the absorbent body by storing and distributing body fluids. Generation can be greatly reduced. Furthermore, the presence of a deep U-shaped valley-like three-dimensional structure isolates the skin surface of the wearer from the absorbent body surface, effectively avoiding contact with bodily fluids and preventing the occurrence of stuffiness and rash. Is done.

FIG. 4 is a schematic left and right cross-sectional view illustrating the presence of the liquid-impermeable portion and the liquid-permeable portion of the SCS. In this figure, for easy understanding, the SCS is shown in an expanded state. 4A to 4C show typical examples.

FIG. 4A is an example in which the covering material for the main body sheet portion and the stretchable side edge portion is composed of one hydrophobic sheet (in this example, PP SMSM nonwoven fabric 15 g / m ² is used). The left and right liquid impervious parts and the stretchable side edges (width W ₁ is 60 mm, left and right total 120 mm) use SMMS as it is, and the central liquid permeable part 16A (width W ₂ is 70 mm) is SMMS is hydrophilized with a nonionic surfactant to impart liquid permeability. The proportion of the liquid-impermeable portion (width: 2 × W ₁ ) was 63%, and the proportion of the liquid-permeable portion was 37%. In this example, the entire liquid permeable portion (width W ₂ ) is uniformly hydrophilized in this example. However, the hydrophilic portion and the hydrophobic portion may coexist in a zebra shape.

FIG. 4B shows an example in which the main body sheet portion is composed of two types of hydrophobic sheets. That is, one type of hydrophobic sheet (in this example, using PP SMSM nonwoven fabric 15 g / m ² ) is used to cover the left and right stretchable side edge portions and one liquid impervious portion of the main body sheet portion as its extension. 16B1 is formed, and another hydrophobic sheet (in this example, a PE / PP spunbond nonwoven fabric 15g / m ² is used), the central liquid-permeable portion 16A and the left and right liquid-impermeable portion portions 16B2 Is configured. The two types of non-woven fabrics are joined to each other with a hot melt adhesive to join the liquid impermeable portion part 16B1 and the liquid impermeable part part 16B2. And elasticized side edges, the total width W ₁ of the joined liquid-impermeable portion is 70 mm), the width W ₂ of the center of the liquid-permeable portion is 50 mm. Central liquid-permeable portion (the width W ₂ is 50 mm) are endowed with hydrophilized liquid permeable the spunbonded nonwoven fabric with a nonionic surfactant. The ratio of the left and right liquid-impermeable portions (2 × W1) was 74%, and the ratio of the liquid-permeable portions was 26%.

FIG. 4C shows another example in which the main body sheet portion is composed of two types of sheets, hydrophobic and hydrophilic. That is, with one type of hydrophobic sheet (in this example, PP SMMS nonwoven fabric 15 g / m ² is used), the covering material on the left and right stretchable side edges, and the liquid-impermeable portion 16B of the main body sheet portion as an extension thereof, The liquid permeable portion 16A in the central portion is constituted by another hydrophilic sheet (in this example, a spunlace nonwoven fabric made of cotton 25 g / m ² is used). The two types of non-woven fabrics are joined to each other with a hot melt adhesive, and the left and right stretchable side edges, the left and right liquid-impermeable portions (width W ₁ is 75 mm), and the central liquid-permeable portion (width) W ₂ is 80mm) is configured. The ratio of the left and right stretchable side edges and the left and right liquid-impermeable portions (2 × W1) was 66%, and the ratio of the liquid-permeable portions was 34%.

FIG. 5 shows a multilayered state of the side portion of the SCS, and is a schematic cross-sectional view in the left-right direction. FIG. 5A to FIG. 5F show typical embodiments. 5 (A) and 5 (B), the stretchable edge of the SCS and the liquid-impermeable portion 16B of the main body sheet portion connected to the SCS are folded inward and overlapped on the main body sheet portion to form two layers. Thus, side portions (X1 in FIG. 5A and X2 in FIG. 5B) are formed. The central portion is an example that exists as a single-layer center portion (Z1 in FIGS. 5A and 5B). 5 (A) and 5 (B) are basically the same in that the stretchable side edge 15 is folded back so as to be inward, and two layers are formed, but the sheet material constituting the SCS is different. . In FIG. 5A, the SCS uses a single hydrophobic sheet having the configuration of FIG. 4A and is folded at the liquid-impermeable portion 16B, whereas in FIG. 5B, the SCS is folded. However, two sheets of a hydrophobic sheet and a hydrophilic sheet having the configuration of FIG. 4C are used, and the liquid-impermeable portion 16B is superimposed on the liquid-permeable portion 16A. The difference is that the side portions are joined to form two layers. In FIG. 5 (A), the upper two layers of the liquid-impermeable portion 16B in the side portion are the first portion (the portion indicated by the broken arrow on the upper side of FIG. 5 (A)), and below the first portion. The lower layer that is disposed on the side and overlaps with the first portion becomes the second portion (the portion indicated by the broken arrow on the lower side of FIG. 5A). In FIG. 5B, the liquid-impermeable portion 16B, which is the upper layer of the side portion, is arranged at the first portion (the portion indicated by the broken arrow on the upper side of FIG. 5B) and below the first portion. Then, the liquid permeable portion 16A that overlaps the first portion becomes the second portion (the portion indicated by the broken arrow on the lower side of FIG. 5B). The first part of the upper layer overlaps with the second part of the lower layer when a part of the first part overlaps with the second part, and when the first part is part of the second part. The case of overlapping is also included. This also applies to the case where the second portion of the upper layer overlaps with the third portion of the lower layer and the case where the third portion of the upper layer overlaps the fourth portion of the lower layer, which will be described later.

5 (C) and 5 (D) are examples in which the SCS has a three-layered side portion. FIG. 5 (C) is the same as FIG. 5 (A) in that the entire SCS uses one hydrophobic sheet having the configuration of FIG. 4 (A). 16B is folded inward (so that the stretchable side edge is inward), and the stretchable side edge 15 and the liquid-impermeable portion 16B of the extended portion are directed outward (stretchable side). It is folded twice (with the edges facing outward) to form a three-layer side portion. In this example, the end of the stretchable side edge 15 is still inside the left and right ends, so the two-layered portion (X3) remains at the left and right ends of the SCS, and the side consisting of the three-layered portion (Y1). And a center part of one layer part (Z1).

The SCS of FIG. 5D is the same as FIG. 5B in that it uses two sheets of a hydrophobic sheet and a hydrophilic sheet having the configuration of FIG. The liquid-impermeable portion 16B is folded so that the elastic portion 16B has the elastic side edge 15 facing outward, and the left and right ends of the liquid-impermeable portion 16B and the left and right ends of the liquid-permeable portion 16A are joined at the joint portion 22. Bonded to form a three-layered side portion. In this example, since the end portion of the stretchable side edge portion 15 reaches the left and right ends, it has a two-part configuration of a side portion composed of a three-layered portion (Y2) and a center portion of a one-layered portion (Z1). . In FIG. 5C, the upper layer of the three layers of the liquid-impermeable portion 16B of the side portion is the first portion (the portion indicated by the upper broken line arrow in FIG. 5C), and below the first portion. An intermediate layer that is disposed on the side and overlaps the first portion is a second portion (a portion indicated by a dashed arrow in the middle of FIG. 5C), is disposed below the second portion, and the second portion The lower layer that overlaps with is the third portion (the portion indicated by the broken arrow on the lower side of FIG. 5C). In FIG. 5D, the upper liquid-impermeable portion 16B of the three layers of the side portion is the first portion (the portion indicated by the broken arrow on the upper side of FIG. 5D), the first portion. The liquid-impermeable portion 16B of the intermediate layer that is disposed on the lower side and overlaps with the first portion is a second portion (a portion indicated by a dashed arrow in the middle of FIG. 5D), below the second portion. The lower liquid-permeable portion 16A, which is disposed on the side and overlaps the second portion, becomes the third portion (the portion indicated by the broken-line arrow below FIG. 5D).

5 (E) and 5 (F) are examples in which the SCS has a four-layer side portion. FIG. 5 (E) is the same as FIG. 5 (C) in that the entire SCS uses one hydrophobic sheet having the configuration of FIG. 4 (A). 16B is folded three times so that the end of the stretchable side edge 15 is inward, outward, and inward to form a four-layer side portion as shown. In this example of the SCS, the folded left and right ends are aligned, so that it has a two-part configuration of a side part composed of a four-layered part (Y3) and a center part of a one-layered part (Z1). The SCS in FIG. 5 (F) is the same as FIG. 5 (D) in that it uses two sheets of a hydrophobic sheet and a hydrophilic sheet having the configuration of FIG. The left and right side portions of the portion 16A are folded inward to form two side portions. Further, the liquid-impermeable portion 16B is folded so that the stretchable side edge 15 faces inward so as to overlap the side portion, and the right and left ends of the liquid-impermeable portion 16B and the left and right ends of the liquid-permeable portion 16A As shown in FIG. In this way, the two-layered portion (X4) composed of the liquid-permeable portion 16A, the side portion composed of the four-layered portion (Y4) where the liquid-permeable portion 16A and the liquid-impermeable portion 16B overlap, and the liquid-permeable portion 16A. This is a three-part configuration of a center part composed of one layer part (Z1). Although FIG. 5 shows an example in which four layers are formed, the number of layers may be five or more, and the two layers, the three layers, and the four layers may be combined to form FIGS. 5C and 5F. ) May be in a coexistence state as exemplified in FIG. In FIG. 5 (E), the top four layers of the liquid-impermeable portion 16B of the side portion are the first portion (the portion indicated by the uppermost broken line arrow in FIG. 5 (E)), the first portion. The lower layer that is disposed on the lower side and overlaps with the first part is the second part (the part indicated by the dashed arrow below the dashed arrow indicating the first part in FIG. 5E), The lower layer that is arranged on the lower side and overlaps with the second part is the third part (the part indicated by the dashed arrow below the dashed arrow indicating the second part in FIG. 5E), below the third part. The lowermost layer that is disposed on the side and overlaps with the third portion is the fourth portion (the portion indicated by the lowermost broken line arrow in FIG. 5E). 5F, the uppermost liquid-impermeable portion 16B of the four layers of the side portion is the first portion (the portion indicated by the uppermost broken line arrow in FIG. 5F), the first The lower liquid-impermeable portion 16B, which is disposed below the first portion and overlaps the first portion, is indicated by a broken line arrow below the broken line arrow indicating the first portion in FIG. 5 (F). The lower liquid permeable portion 16A, which is disposed below the second portion and overlaps with the second portion, is below the third portion (below the broken line arrow indicating the second portion in FIG. 5F). ), The lowermost liquid-permeable portion 16A which is disposed below the third portion and overlaps the third portion is the fourth portion (the lowermost portion of FIG. 5F). Part indicated by a broken line arrow).

Such multi-layering of the side part can be obtained by determining the lateral width of the SCS in the front-rear direction, that is, the front body F, the crotch C, and the rear body R, and the degree of three-dimensionality that is convex downward. It is for preparation and optimization according to the age and gender of the wearer. The effect will be further described in detail in Examples.

FIG. 6 and FIG. 7 are views showing another embodiment of the absorbent article of the present invention having an SCS provided with side portions in different multi-layer states. 6 and 7, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. In the embodiment shown in FIGS. 8 to 10 as well, the same components as those in FIG. In the embodiment shown in FIGS. 6 to 8, the surface sheet 12 shown in FIG. 1 is not provided on the absorber 11, but the surface sheet 12 may be provided on the absorber 11. Further, in FIGS. 6 to 8, the leak preventer 10, the detachable member 21 and the like shown in FIG. 1 are omitted.

FIG. 6 (A) is a developed plan view schematically showing the SCS that is stretched from front to back and from side to side and left and right. Although the same elements as the basic structure of FIG. 3 are provided, the state where the side portions are multilayered is different from the presence state of the absorber joint portion. The absorbent joint portion 13A shown in FIG. 6A is shorter than the absorbent joint portion 13 of FIG. The absorbent joint portion 13A is disposed in the crotch C, and its length is shorter than the length of the crotch C.

The SCS in FIG. 6 (A) is composed of the same two sheets as in FIG. 4 (C), and the liquid-impermeable portion 16B is folded inward by the same method as in FIG. It is composed. FIG. 6 (B) is a lateral end view of the VIB-VIB portion at the front end of FIG. 6 (A), showing a relaxed state and a relaxed state. The double side part is joined up and down, and also joined to the surface of the absorbent body 11 and fixed so that it cannot be widened. The center part is fully stretched, and the whole part is on the absorbent body surface. In contact. FIG. 6C is a lateral end view of the VIC-VIC portion of the front body F of FIG. 6A and shows a state when the tension is eased and the side part is partially unscrewed. The center portion is in a state of being slightly slack, does not come into contact with the surface of the absorber 11, and is in a state of being lifted up as a whole. FIG. 6 (D) is a lateral end view of the VID-VID part of the crotch C in FIG. 6 (A) and shows a state in which the tension is relaxed. In this portion, the entire side portion is unfolded and further widened, and the center portion and the absorber surface are joined by a strip-like absorber joint portion 13A. The entire main body sheet portion 16 is pulled and stretched by the absorber joint portion 13A, hangs down from the stretchable

side edge portions

15L and 15R into a valley shape, and forms a three-dimensional structure that is convex downward.

FIG. 7A is a developed plan view schematically showing the SCS in a tension state by extending the SCS in the present embodiment from front to back and from side to side. Although the same elements as the basic structure of FIG. 3 are provided, the state where the side portions are multilayered is different from the presence state of the absorber joint portion. 7A is shorter in length than the absorbent joint portion 13 in FIG. 1, and the absorbent joint portion 13A is disposed in the crotch portion C, and its length is inseam. It is shorter than the length of the part C. The SCS of this example is composed of the same sheet as in FIG. 4A, and the liquid impermeable portion is folded twice and formed into a triple side portion in substantially the same manner as in FIG. 5C. ing. FIG. 7 (B) is a lateral end view of the VIIB-VIIB site at the front end of FIG. 7 (A), showing the relaxed and relaxed state. The triple side part is joined up and down, and also joined to the absorber surface and fixed so that it cannot be widened. The center part is fully extended, and the whole part contacts the absorber surface. ing. As shown in FIG. 7 (B), the side edge of the front end is in a state where there is no stretchable body. FIG. 7C is a lateral end view of the VIIC-VIIC portion of the front body F of FIG. 7A, showing the state when the tension is eased and the side part is partially unwound. The center portion is in a state of being slightly slack, does not come into contact with the surface of the absorber 11, and is in a state of being lifted up as a whole. FIG. 7 (D) is a lateral end view of the VIID-VIID part of the crotch C in FIG. 7 (A) and shows a state in which the tension is relaxed. In this part, the entire side part is unwound, and the center part and the absorber surface are joined by a linear absorbent joint part 13A. The entire main body sheet portion 16 is pulled and stretched by the absorber joint portion 13A, hangs down from the stretchable

side edge portions

FIG. 8 shows an example in which a shape-retaining material is joined to the main body sheet portion of the SCS. The shape retaining member 23 is an area including the crotch C and is joined to a part of the main body sheet portion 16 and plays a role of further stabilizing the convex three-dimensional structure formed over the crotch C and the vicinity thereof. 8 (A), 8 (C), 8 (E), and 8 (G) are schematic plan development views in a tension state, and FIG. 8 (B) and FIG. 8 (D). 8 (F) and FIG. 8 (H) are schematic diagrams of the lateral end surfaces illustrated in a state where tension is relaxed. In each figure, the absorber portion is indicated by a dotted line.

In the example of FIGS. 8A and 8B, the rectangular shape holding member 23 is located on the inner side of the portion corresponding to the crotch C of the main body sheet portion 16 with the linear absorbent joint portion 13 A interposed therebetween. It is provided symmetrically. The rectangular shape retaining material 23 used is a PP foam sheet having a thickness of about 1 mm, and is hydrophobic and liquid-impermeable.

The shape retaining material 23 is joined to the inside of the main body sheet portion 16 made of a PE / PP spunbond nonwoven fabric by a hot melt adhesive. As shown in the lateral end view of FIG. 8 (B), the rectangular shape holding member 23 exceeds the liquid permeable portion 16A of the main body sheet portion 16 that has been subjected to the hydrophilic treatment, so as to be hydrophobic. It joins in the range which covers a part of liquid-impermeable part 16B. Due to the bonding effect of the shape retaining member 23, most of the crotch portion except the central portion where the absorbent body bonding portion 13A is located is liquid-impermeable, so that a large amount of bodily fluid collected in the main body sheet portion at the time of wearing. The part moves back and forth in the crotch part C. Further, due to the presence of the shape-retaining material 23, the three-dimensional structure formed in the lower crotch part can withstand the deformation pressure of the left and right and up and down generated during wearing, and even when subjected to crushing by weight, The space existing between the absorber surface can be maintained.

In the example of FIGS. 8C and 8D, the shape holding member 23 having a rectangular shape is the same as the example of FIGS. 8A and 8B, but the main body sheet portion 16 is the same. It is different in that it is joined outside. Also in this example, the rectangular shape retaining material 23 exceeds the liquid permeable portion 16A in which the main body sheet portion 16 is hydrophilized as shown in the schematic diagram of the lateral end surface of FIG. Thus, bonding is performed within a range that covers a part of the hydrophobic liquid-impermeable portion 16B. Due to the bonding effect of the shape retaining material 23, most of the crotch portion except the central portion where the absorber bonding portion 13A is present is liquid-impermeable, so that the body fluid collected in the main body sheet portion 16 at the time of wearing is removed. Most of the crotch part C moves back and forth. Further, due to the presence of the shape-retaining material 23, the three-dimensional structure formed in the lower crotch part can withstand the deformation pressure of the left and right and up and down generated during wearing, and even when subjected to crushing by weight, The space existing between the absorber surface can be maintained.

8 (E) and 8 (F) are examples in which the shape-retaining material is different in shape and material from those in FIGS. 8 (A) to 8 (D). The shape-retaining material 11A used is a sheet-like absorbent body, which is an absorbent body 11 arranged over the entire length from the front body F, through the crotch C to the back body R, with side edges on the front and rear of the crotch C. An oblique slit 24 is provided from the center to the center, and is cut out in a trapezoidal shape, leaving a central portion with the absorber joint portion 13A. That is, the shape retaining material 11 A becomes a part of the absorber 11. A trapezoidal shape retaining material 11 A is provided on the outer side of the portion corresponding to the crotch portion C of the main body sheet portion 16 in a symmetrical manner with an absorbent joint portion 13 B running in a strip shape. The length of the absorber joint 13B is shorter than the length of the absorber joint 13A shown in FIGS. 8A to 8D, and is formed only in the crotch C. The length of the absorber joint 13B may be smaller than the length of the crotch C. The shape retaining material 11A made of a trapezoidal sheet-shaped absorber is provided on the outer side of the main body sheet portion 16 from the left and right side surfaces to the bottom surface as shown in the schematic diagram of the lateral end surface of FIG. The liquid-permeable portion 16A subjected to the chemical treatment is joined at the absorber joint portion 13B, and the hydrophobic liquid-impermeable portion 16B is joined at the left and right side surface joint portions 25 at three locations. A part of the body fluid collected in the main body sheet portion 16 at the time of wearing passes through the liquid permeable portion 16A of the main body sheet portion 16, and is absorbed and fixed to the sheet-like absorbent body which is the shape holding material 11A. This sheet-like absorber contains a relatively large amount of SAP and swells in response to absorption, but continues to maintain rigidity. Due to the presence of the shape-retaining material 11A, the three-dimensional structure formed in the crotch part can withstand the deformation pressure of left and right and up and down that occurs when worn, and absorbs from the body surface even when it is crushed by weight. The space existing between the body surface can be maintained.

8 (G) and 8 (H) are the same as the examples of FIGS. 8 (E) and 8 (F) in that the shape-retaining material is a sheet-like absorber, but the absorber 26. Is a vertical rectangular main absorbent body 28 that exists from the front body F through the crotch C to the back body R, and an auxiliary absorption that is placed on the main absorbent body 28 so as to cover the left and right width of the crotch C It consists of the body 27, and the points which use the part of the auxiliary absorber 27 as a shape maintenance material differ. The main absorber 28 is made of the same material as the absorber 11. As shown in the horizontal end face schematic diagram of FIG. 8 (H), the shape holding material composed of the auxiliary absorbent 27 is provided on the outer side of the main body sheet portion 16 from the left and right side surfaces to the bottom surface, and the main body sheet portion 16 is hydrophilized. The liquid permeable portion 16A is joined to the absorber joint portion 13B, and the hydrophobic liquid impermeable portion 16B is joined to the left and right side surface joint portions 25 at three locations. A part of the body fluid collected in the main body sheet portion 16 at the time of wearing passes through the liquid permeable portion 16A of the main body sheet portion 16 and is absorbed and fixed to the sheet-like absorbent body which is a shape holding material (auxiliary absorbent body 27). . This sheet-like absorber contains a relatively large amount of SAP and swells in response to absorption, but continues to maintain rigidity. Due to the presence of this shape-retaining material, the lower convex three-dimensional structure formed in the crotch part can withstand the deformation pressure of left and right and up and down that occurs when worn, and the body surface and absorber even when subjected to weight crushing The space existing between the surfaces can be maintained. The auxiliary absorbent body 27 serving as the shape holding material may be made of the same material as the main absorbent body 28 or a different material. When the auxiliary absorber 27 includes SAP, the SAP content may be less than that of the main absorber 28 in order to reduce the thickness of the auxiliary absorber 27.

FIG. 9 is a view showing still another embodiment of the absorbent article of the present invention when a shape-retaining material is joined to the main body sheet portion of the SCS. The absorbent article 101 of FIG. 9 basically has a sheet-like leak preventer 10 that prevents leakage of bodily fluids, an absorber 11 that can absorb bodily fluids disposed at least one layer above the leak preventer 10, and a surface sheet. From the front end portion in the length direction of the absorbent article main body to the upper end of the absorbent article main body 40 having the (top sheet) 12 and the front end portion, the crotch portion, and the rear body portion to the rear end portion An absorbent article comprising a skin contact sheet (SCS) 17 to be arranged, wherein the SCS 17 is joined to the elastic side edges 15L, 15R at the left and right ends and the elastic side edges 15L, 15R at the left and right ends. The front and rear end portions of the SCS 17 are joined to the vicinity of the front end portion and the vicinity of the rear end portion of the absorbent article main body, respectively, and the main body sheet portion 16 is provided with

stretchable side edges

15L and 15R. Liquid adjacent to It is composed of a permeable portion 16B and a liquid permeable portion 16A at the center, and the main body sheet portion 16 extends from the stretchable side edge to the absorber surface (surface of the surface sheet (top sheet) 12) in a region including the crotch portion. In the region including the crotch portion, a part of the liquid permeable part of the main body sheet part 16 and a part of the surface of the absorbent body are joined to each other. An absorption including a convex three-dimensional structure on the lower side having an upper opening made up of left and right edges of the SCS 17 and left and right side faces made up of the main body sheet portion 16 and a bottom surface in a region including the crotch portion. It is a body article. A rectangular shape holding material 23 is joined to the liquid permeable portion 16 A of the main body sheet portion 16.

Hereinafter, an example of a children's tape type diaper, which is a specific example of the absorbent article, will be described with reference to FIG. FIG. 9 is a tape-type diaper for children, which has the same elements as FIG. 1 and uses the same material, but the configuration state of the SCS, the length of the absorber joint, and the shape-retaining material at the crotch C The difference is that 23 is joined. The absorbent joint portion 13A is disposed in the crotch C, and its length is shorter than the length of the crotch C. FIG. 9A is a developed plan view schematically illustrating the diaper of this specific example extended in the front-rear and left-right directions in a tension state. The SCS of this example has the same shape as FIG. 5 (D), is composed of two sheets, folds the liquid-impermeable portion 16B composed of the stretchable

side edge portions

15L and 15R and its extension, and the lower surface of the inner edge; The upper surface of the liquid permeable portion 16A is joined, and is composed of a three-layered inner portion, a side portion having a stretchable side edge portion on the outer side, and a single-layer center portion. 8C and 8D are made of the same PP foam sheet as in the crotch portion of the center portion, and the rounded rectangular shape holding material is symmetrical with the strip-shaped absorber joint portion 13A interposed therebetween. Is arranged. The length of the absorber joint portion 13A is 250 mm in FIG. 1, but is as short as 90 mm in FIG. Since the shape retaining material 23 greatly contributes to the stabilization of the crotch part, the length of the absorber joint portion 13A may not be larger than the length of the crotch part C, and may be the same as or shorter than the length of the crotch part C. Also good. FIG. 9B is a schematic diagram of the lateral end surface of VIIIB-VIIIB in FIG. 9A illustrated in a tension state. 8C is different from FIG. 8D in that the round and rectangular shape holding material 23 is joined to the liquid permeable portion 16A of the main body sheet portion 16 and is not connected to the liquid impermeable portion 16B. . FIG. 9C is also a schematic diagram of the lateral end surface of VIIIB-VIIIB in FIG. 9A, illustrating a relaxed state in which the tension is released. In the crotch part C, most of the crotch part C is liquid-impermeable except for the central part where the absorbent joint 13A exists due to the effect of the liquid-impermeable shape retaining material 23. Then, most of the body fluid collected in the main body sheet portion 16 moves to the front body F and the back body R without being absorbed by the crotch C, and the main body sheet portion in the front body F and the back body R 16 liquid permeable portions 16A are transferred to the absorber surface. Due to the presence of the shape-retaining material 23, the three-dimensional structure formed under the crotch portion withstands left and right, upper and lower deformation pressures generated during wearing, even when used for a long time or when discharging body fluids many times. When the space between the body surface and the absorbent body surface (surface of the surface sheet (top sheet) 12) is maintained even when the body is crushed by weight, the movement path of the discharged body fluid is always secured by this. At the same time, contact between the wearer's skin and the wet absorbent surface can be avoided.

When the product of the embodiment of FIG. 9 is actually worn, the leak preventer at the crotch part is worn while keeping a convex state as shown in FIG.

Referring to FIG. 10, another example of the children's tape type diaper, which is a specific example of the absorbent article, will be described. FIG. 10 is a tape-type diaper for children, which has the same elements as FIG. 1 and uses the same material, but the length of the absorber joint, inner leg gather (ILG) 29 and hips instead of OLG The difference is that a wrap gather (HWG) 30 is provided.

FIG. 10 (A) is a developed schematic plan view illustrating the diaper of this specific example extended in the front-rear and left-right directions and shown in a tension state. The SCS of this example is the same as that shown in FIG. 1, but the absorber joint portion 13A is disposed in the crotch part C, and its length is shorter than the length of the crotch part C and has a strip shape. FIG. 10B is a schematic cross-sectional view taken along the line XB-XB in FIG. 10A illustrated in a tension state, and FIG. 10C illustrates a relaxed state in which the tension in FIG. 10B is released.

As can be seen from a comparison of FIGS. 10A, 10B, and 10C, the inner leg gathers (ILG) 29 are provided on both the left and right sides of the absorbent body 11, and include a stretchable head and a non-woven leg. It has a shape that stands up in a relaxed state. This ILG 29 prevents lateral leakage (side leakage) of the absorbent article of body fluid, and is the upper surface of the absorbent body (here, the upper surface of the surface sheet (top sheet) 12), the side edge of the absorbent body, or the absorption. It is installed on the outside of the body (here, the side edge or outside of the surface sheet (top sheet) 12). The hip wrap gather (HWG) 30 can be seen from the position sandwiched between the absorber and the leak preventer at the back body part as shown in FIG. 10 (A), (B), (C). It is arranged to extend to the outer edge. The HWG 30 literally works so as to wrap the wearer's buttocks when worn, and the back part of the absorbent article is brought into close contact with the body to prevent slippage and the generation of gaps. In the embodiment of the present invention, three polyurethane filaments are used as the HWG, but a larger number of filaments may be arranged, and a stretchable film or cushioning stretchable foam is used. Also good.

FIG. 11 is an explanatory view comparing the shape of the appearance when a pant-type diaper is worn as an example of the absorbent article of the present invention with a conventional pant-type diaper. 11 (A) and 11 (B) show a case of a pants-type diaper as an example of the absorbent article of the present invention using the shape holding member shown in FIGS. 8 (C) and 8 (D). , (D) schematically shows the state of seeing through the crotch part in the case of conventional pants-type diapers.

FIG. 11 (A) shows the state of the product before wearing, and FIG. 11 (B) shows the wearing state. Each has the leak preventer 10 and the absorber 11 and the shape holding material 23 arranged under the same conditions as in FIGS. 8C and 8D, and further includes the SCS comprising the stretchable side edge 15 and the main body sheet portion 16. ILG29. FIG. 11 (C) shows the state of the product before wearing, and FIG. 11 (D) shows the wearing state. Each includes a leak preventer 10, an absorber 11, and an ILG 29. The absorbent body 11 has the same specifications for both diapers, and a mixture of SAP and pulp is covered with tissue paper.

When the diaper of an example of the present invention is compared with a conventional diaper, the product state before wearing, that is, the difference in shape between the appearance of FIG. 11 (A) and FIG. 11 (C) is not observed. 11 (B) and FIG. 11 (D) which are the states of FIG. 11B, in FIG. 11 (B) having a V-shaped or U-shaped shape at the crotch, the leak preventer 10, the absorber 11 and The entire structure including the SCS is deformed so as to have a downwardly convex shape. On the other hand, in the conventional product having no SCS, the absorber 11 is irregularly deformed and is pushed into the crotch. Such a so-called bunching state is a phenomenon that occurs in common with conventional absorbent products, including a pants type and a tape type.

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 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 paper diapers (for children and adults), incontinence products (for humans and pets), training pants, feminine sanitary products, and the like.

DESCRIPTION OF SYMBOLS 100 Absorber article 10 Leak preventer 11 Absorber 12 Surface sheet 13 Absorber joint 14 Outer leg gather (OLG)
15 Stretchable side edge 16 Body sheet 16A Liquid permeable part
16B Liquid-impermeable part 17 Skin contact sheet (SCS)
18 Front end joint 19 Rear end joint 20 Transition outlet (slit)
DESCRIPTION OF SYMBOLS 21 Detachable material 22 Joint part 23 Shape holding material 24 Slit 25 Side joint part 26 Absorber 27 Auxiliary absorber 28 Main absorber 29 Inner leg gather (ILG)
30 Hip Wrap Gather (HWG)

Claims

An absorbent article main body comprising: a sheet-like leak preventer that prevents leakage of bodily fluid; and an absorber that is disposed at an upper part of the leak preventer and is capable of absorbing bodily fluids;
On the upper part of the absorbent body, from the front end part in the length direction of the absorbent article main body, through the front body, the crotch part and the back body part, the skin contact sheet is disposed,
An absorbent article comprising:
The skin contact sheet has a stretchable side edge portion provided at each of left and right end portions, and a main body sheet portion joined to the stretchable side edge portion of the left and right end portions,
The front end portion and the rear end portion of the skin contact sheet are respectively joined to the front end portion and the rear end portion of the absorbent article main body,
The main body sheet portion is composed of a liquid impermeable portion adjacent to each of the stretchable side edges of the left and right end portions, and a liquid permeable portion disposed between the liquid impermeable portions,
In the region including the crotch, the main body sheet portion is configured to hang down from the stretchable side edge toward the absorber surface,
An absorbent article having an absorbent joint part in which a part of the liquid permeable portion of the main body sheet part and a part of the surface of the absorbent body are joined to each other in a region including a crotch part.
The main body sheet portion is multi-layered with a first portion adjacent to the left and right stretchable side edges and a second portion that is disposed as a lower layer of the first portion and overlaps the first portion. The absorbent article according to claim 1, wherein the absorbent article is composed of a side portion and a center portion between the second portions.
The absorbent article according to claim 2, wherein the first portion is formed by folding the main body sheet portion so that the left and right stretchable side edges are inward.
The main body sheet portion is arranged as a first portion adjacent to the left and right stretchable side edges, a second portion disposed as a lower layer of the first portion, and overlapping the first portion, and the second A third portion that is arranged as a lower layer of the portion, and overlaps with the second portion, and a side portion that is multilayered, and a center portion between the third portions,
The second part is formed by folding a part of the main body sheet part so that the left and right stretchable side edges are inward, and the first part is a part of the folded part. The absorbent article according to claim 1, wherein a part of the absorbent article is formed by being folded again so that the left and right stretchable side edge portions face outward.
The main body sheet portion is arranged as a first portion adjacent to the left and right stretchable side edges, a second portion disposed as a lower layer of the first portion, and overlapping the first portion, and the second The third portion is arranged as a lower layer of the second portion and overlaps with the second portion, and the fourth portion is arranged as a lower layer of the third portion and overlaps with the third portion, and is multilayered It is composed of a side part and a center part between the fourth part,
The third portion is formed by folding a part of the main body sheet portion so that the left and right stretchable side edges are inward, and the second portion is a portion of the folded portion. A part of the left and right stretchable side edges are folded back again so that the left and right stretchable side edges face outward, and the first part is part of the folded back part of the left and right stretchable side edges. The absorbent article according to claim 1, wherein the absorbent article is formed by being folded back again so that the portion faces inward.
The side parts folded and multilayered are joined and fixed so that the folded state cannot be widened at the front end and the rear end,
The absorbent article according to any one of claims 1 to 5, wherein the crotch part is configured to be in a state in which the folded state is opened and fully extended.
The absorbent article according to any one of claims 1 to 6, wherein a part of the main body sheet portion is provided with a body fluid transfer outlet to the absorber surface.
The absorbent article according to claim 7, wherein the bodily fluid transition outlets are provided at two positions before and after the front body part and the rear body part.
At the time of wearing, in a region including the crotch part, the cross-sectional shape in the left-right direction is a three-dimensional shape that protrudes downward, having an upper opening composed of left and right edges of the skin contact sheet, left and right side surfaces composed of the main body sheet portion, and a bottom surface. The absorbent article according to any one of claims 1 to 8, which has a structure.
In a region including the crotch, a shape retaining material is joined to a part of the main body sheet portion,
In a region including the crotch, a convex three-dimensional structure is formed on the lower side in which the cross-sectional shape in the left-right direction has an upper opening made up of the left and right edges of the skin contact sheet, and left and right side faces made up of the body sheet part The absorbent article according to any one of claims 1 to 9, wherein the shape maintaining material stably maintains a convex shape when it is formed.
The absorbent article according to claim 10, wherein the shape retaining material is provided on the left and right side surfaces of the main body sheet portion.
The absorbent article according to claim 11, wherein the shape retaining material is provided outside the left and right side surfaces of the main body sheet portion.
The absorbent article according to claim 11, wherein the shape retaining material is provided inside the left and right side surfaces of the main body sheet portion.
The absorbent article according to claim 11, wherein the shape retaining material is provided from the left and right side surfaces to the bottom surface of the main body sheet portion.
The absorbent article according to claim 12, wherein the shape retaining material is provided from one outer side of the left and right side surfaces of the main body sheet portion to the other outer side through the lower side of the bottom surface.
The absorbent article according to claim 13, wherein the shape retaining material is provided from one inner side of the left and right side surfaces of the main body sheet portion to the other inner side through the upper side of the bottom surface.
The absorbent article according to any one of claims 10 to 16, wherein the shape retaining material is a liquid-impermeable sheet.
The absorbent article according to any one of claims 10 to 16, wherein the shape retaining material is a liquid-impermeable foam sheet.
The absorbent article according to any one of claims 10 to 16, wherein the shape retaining material is a sheet-like absorbent body.
The absorbent article according to any one of claims 1 to 19, wherein the absorbent joint portion exists in a linear shape or a belt shape continuous in the front-rear direction.
The absorbent article according to any one of claims 1 to 19, wherein the absorbent joint portion is present in the form of a discontinuous line or strip in the front-rear direction.
The absorbent article according to any one of claims 1 to 21, wherein the absorbent joint portion is disposed in a crotch part.
The absorbent article according to any one of claims 1 to 21, wherein the absorbent joint portion extends from a crotch part to a front body.
The absorbent article according to any one of claims 1 to 21, wherein the absorbent joint portion extends from a crotch part to a back body.
The absorbent article according to any one of claims 1 to 24, wherein when the leak preventer is worn, at least in the crotch, the leak preventer has a convex shape on the lower side.
The absorbent article according to any one of claims 1 to 25, wherein ILG is provided on the left and right outer sides of the skin contact sheet.
The absorbent article according to any one of claims 1 to 26, wherein OLG is provided on the left and right outer sides of the skin contact sheet.
The absorbent article according to claim 27, wherein the OLG is disposed only in the crotch.
The absorbent article according to any one of claims 1 to 25, wherein an HWG (hip wrap gather) is bonded to the left and right outer surfaces of the skin contact sheet.
At the front end and the rear end of the absorbent article body having a sheet-like leak preventer that prevents leakage of bodily fluids, and an absorber that is disposed at least one layer above the leak preventer and can absorb bodily fluids , The front end and the rear end are joined,
On the upper part of the absorbent body, from the front end part in the length direction of the absorbent article main body, a skin contact sheet disposed over the rear end part through the front body, the crotch part and the back body part,
The skin contact sheet has a stretchable side edge portion provided at each of left and right end portions, and a main body sheet portion joined to the stretchable side edge portion of the left and right end portions,
A skin contact sheet in which the main body sheet portion is composed of a liquid impermeable portion adjacent to each of the stretchable side edges of the left and right end portions, and a liquid permeable portion disposed between the liquid impermeable portions. .