WO2013094726A1

WO2013094726A1 - Disposable wearable article

Info

Publication number: WO2013094726A1
Application number: PCT/JP2012/083212
Authority: WO
Inventors: 邦彦桂川; 賢一笹山; 市川　誠
Original assignee: ユニ・チャーム株式会社
Priority date: 2011-12-21
Filing date: 2012-12-21
Publication date: 2013-06-27
Also published as: JPWO2013094726A1; JP6173219B2

Abstract

Provided is a disposable wearable article that can prevent excrement, such as urine, from accumulating between a pair of leak-preventing flaps and prevent excrement from leaking. This disposable diaper (10) has a longitudinal direction (Y) and a lateral direction (X) which are orthogonal to one another, and comprises: a skin opposing surface and a skin non-opposing surface; a front waist region (13); a back waist region (14); a crotch region (15) located between the front and back waist regions (13, 14); an elastic waist panel (11) that defines the front and back waist regions (13, 14) and that is formed of front and back waist panels (18, 19); and a crotch panel (12) that is connected to the elastic waist panel (11) and defines the crotch region (15), the crotch panel including a pair of leg-surrounding seal regions (20) and a liquid-absorbent structure (49). The liquid-absorbent structure (49) comprises a liquid-absorbent material layer (62) that includes liquid-absorbent polymer particles (63) and that is provided between liquid-permeable upper and lower sheets (60, 61). The liquid-absorbent structure has a central region (41) located in the center in the lateral direction (X), and side regions (42) located on both sides in the lateral direction (X). Each side region (42) is formed as a portion of the leg-surrounding seal region (20) by being folded toward the central region (41) along a virtual folding line (21) located between the central region (41) and each side region (42). An absorbent region (64) extends along the lateral direction (X) from the central region (41), beyond the virtual folding lines (21), and up to the side regions (42).

Description

Disposable wearing items

The present invention relates to a disposable wearing article, and more particularly to a disposable wearing article such as a disposable diaper, a disposable toilet training pant, a disposable incontinence pant, a disposable sanitary pant, a disposable absorbent pad, and the like.

Conventionally, disposable wearing articles having a pair of leak-proof flaps are known. For example, Patent Document 1 discloses a diaper in which a hydrophobic nonwoven fabric sheet is pasted on the surface of the leg circumference flap to prevent body fluid leakage from around the leg, and an elastic elastic member is attached to the inner free edge of the nonwoven fabric sheet. A disposable wearing article is disclosed in which a leak-proof flap is formed by standing from the inner surface.

Also, Patent Document 1 discloses that absorbent polymer particles are interposed between two sheets.

JP-A-8-289902

By the way, in recent years, an absorbent article in which an absorbent region where the absorbent polymer particles exist and a seal region for sealing the absorbent polymer particles are alternately arranged in the longitudinal direction is known. When the absorbent region and the seal region of such an absorbent article are applied to the liquid-absorbent core of the diaper disclosed in Patent Document 1, the absorbent region is narrowed, and therefore between the pair of leak-proof flaps. There is a possibility that excrement such as urine may accumulate and the excretion may leak from around the legs.

Therefore, an object of the present invention is to provide a disposable wearing article that prevents accumulation of excrement such as urine between a pair of leak-proof flaps and prevents the excrement from leaking.

The present invention has a longitudinal direction along a virtual longitudinal center line and a lateral direction perpendicular thereto, and is positioned between the skin facing surface and the non-skin facing surface, the front waist region, the rear waist region, and the front and rear waist regions. A crotch region to be defined, an elastic waist panel defined by the front and rear waist panels, and a crotch region coupled to the elastic waist panel to define the crotch region, between the base sheet and the body side liner It exists in the disposable wearing article containing the liquid absorbing structure which interposes, and a crotch panel provided with a pair of leg periphery sealing area.

The crotch panel is defined by a virtual folding line that is separated by a certain distance from the front and rear end portions and both side edges of the crotch panel toward the virtual longitudinal center line side, and the first central region and the first both side regions in the lateral direction. Have
The liquid-absorbing structure is formed in a sheet shape, and is interposed between a liquid-permeable upper sheet, a lower sheet, and the upper and lower sheets. A liquid-absorbing material layer containing at least liquid-absorbing polymer particles, a second central region located on the first central region, a second two-side region located on the first two-side region, and Having at least one absorption region extending from the second central region to the second side regions;
The first side regions of the crotch panel are at least at the front and rear end portions, together with both side portions of the base sheet, both side portions of the body side liner, and the second both side regions of the liquid-absorbing structure. It has the seal area around both legs defined by being bent from a virtual folding line to the side of the virtual vertical center line, and is connected to the front and rear waist panels,
The seal areas around the legs are separated from the body side liner toward the wearer's thigh by contraction.

According to the disposable wearing article according to one or more embodiments of the present invention, the absorbent region extends in the lateral direction from the central region to both side regions / leg seal regions, so excrement between the pair of leg seal regions. It is possible to increase the area that can absorb water. Therefore, it is possible to reduce the accumulation of excrement such as urine between the pair of leg-hole seal areas, and to prevent the excrement from leaking.

The perspective view of the disposable diaper shown as an example of the disposable wearing article of this invention. The partially broken expansion | deployment top view which looked at the diaper of the state which peeled the side seam part and extended in the vertical direction and the horizontal direction from the skin opposing surface. The exploded perspective view of a diaper. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a sectional view taken along line VV in FIG. 2. The perspective view seen from the bottom of the liquid-absorbing structure which partly fractured. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. FIG. 4 is a cross-sectional view of the crotch panel in the horizontal direction and a development view showing a state before the crotch panel is bent along a virtual folding line. Sectional drawing in the horizontal direction of a crotch panel, and explanatory drawing which shows the wearing condition of a crotch panel. Explanatory drawing of the modification of a liquid absorptive structure.

A disposable diaper 10 which is an example of the disposable wearing article of the present invention will be described with reference to FIGS. As shown in FIG. 2, the diaper 10 has a longitudinal direction Y and a transverse direction X orthogonal thereto, a virtual longitudinal center line PP that bisects the transverse dimension in the transverse direction X, and a longitudinal dimension in the longitudinal direction Y. It has a virtual horizontal center line QQ that bisects. The diaper 10 is formed symmetrically with respect to the virtual vertical center line PP.

The diaper 10 has a skin-facing surface and a non-skin-facing surface that faces the skin, and an annular elastic waist panel 11 that extends in a direction around the waist; a crotch panel 12 that is attached to the non-skin-facing surface of the elastic waist panel 11; A front waist region 13 defined by the elastic waist panel 11, a rear waist region 14, and a crotch region 15 extending between the front and

rear waist regions

13, 14 in the longitudinal direction Y are included. The elastic waist panel 11 includes a front waist panel 18 located in the front waist region 13 and a rear waist panel 19 located in the rear waist region 14.

The front waist panel 18 intersects with the crotch panel 12 at the front end portion thereof, and extends to the lateral direction X, and the outer end edge extends in the lateral direction X so as to face and separate from the inner end edge 18a in the longitudinal direction Y. It has a horizontally long rectangular shape defined by 18b and both

side edges

18c, 18d extending in the longitudinal direction Y between the inner and

outer end edges

18a, 18b.

The rear waist panel 19 is substantially the same shape and size as the front waist panel 18, and an inner end edge 19 a that intersects the crotch panel 12 at the rear end and extends in the lateral direction X, and an inner end edge in the vertical direction Y It has a horizontally long rectangular shape defined by an outer end edge 19b extending in the lateral direction X so as to be spaced apart from 19a and both

side edges

19c, 19d extending in the longitudinal direction Y between the inner and

outer end edges

19a, 19b.

Each of the

side edges

18c, 18d of the front waist panel 18 and each of the

side edges

19c, 19d of the rear waist panel 19 are overlapped with each other and connected by side seam portions 22 extending intermittently in the longitudinal direction Y. An opening 23a and a pair of leg openings 23b are defined (see FIG. 1). The side seam portion 22 is applied by a known joining means, for example, various heat welding means such as hot embossing / debossing and sonic processing.

As shown in FIG. 2, the front waist panel 18 includes a first inner sheet 24 positioned on the skin facing surface side and a first outer sheet 25 positioned on the non-skin facing surface side. The first inner and

outer sheets

24 and 25 are substantially liquid-impervious SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, spunbond nonwoven fabric, plastic sheet or a nonwoven fabric having a mass of about 10 to 30 g / m ² . It can be formed from at least one laminate sheet. The inner and

outer surface sheets

24 and 25 are joined to each other by hot melt adhesive applied intermittently to the longitudinal direction Y and / or the lateral direction X on the inner surface of at least one of the inner surfaces and the thermal welding.

A plurality of thread-like, strand-like or string-like elastic bodies 27 extending in the transverse direction X and having substantially the same wire diameter are fixed between the inner and

outer surface sheets

24 and 25 of the front waist panel 18. The front waist panel 18 is elasticized so as to be at least contractible in the lateral direction X by fixing the elastic body 27 via a hot melt adhesive while being stretched at a required magnification in the lateral direction X. As long as there is no possibility that the inner and

outer surface sheets

24 and 25 are peeled off during the wearing of the diaper 10, the inner and

outer surface sheets

24 and 25 are spaced apart from the circumferential surface of the elastic body 27 in the length direction thereof. Preferably, they may be joined to each other only via a hot melt adhesive applied to substantially the entire circumferential surface. The elastic body 27 includes a plurality of elastic bodies 28 extending in the lateral direction X along the outer end edge 18b of the front waist panel 18, and a plurality of elastic bodies 29 extending in the lateral direction X along the inner end edge 18a. Composed. The elastic body 29 is arranged such that a part of the elastic body 29 adjacent to the elastic body 28 is denser than the elastic body 28. The expansion ratio of the elastic body 28 may be higher than that of the elastic body 29 as necessary.

The rear waist panel 19 includes a second inner sheet 30 positioned on the skin facing surface side and a second outer sheet 31 positioned on the non-skin facing surface side. The second inner and

outer sheet

30, 31 is a substantially liquid-impervious SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, spunbond fiber nonwoven fabric, plastic sheet or a mass of about 10 to 30 g / m ² . It can be formed from a laminate sheet with at least one nonwoven fabric. The inner and

outer surface sheets

30 and 31 are joined to each other by a hot melt adhesive applied to the at least one inner surface in the longitudinal direction and / or the lateral direction X so as to be separated from each other or by the heat welding means.

Between the second inner and

outer surface sheets

30, 31, a plurality of thread-like, strand-like or string-like elastic bodies 32 having substantially the same diameter extending in the transverse direction X are hot-melted while being stretched in the transverse direction X at a required magnification. It is fixed via an adhesive. The rear waist panel 19 is elasticized so that it can contract at least in the lateral direction X by fixing the rear waist elastic body 32. The inner and

outer surface sheets

30 and 31 are joined to each other only through a hot melt adhesive applied to almost the entire circumferential surface at a constant interval in the longitudinal direction and / or the lateral direction X on the circumferential surface of the elastic body 32. May be. The elastic body 32 includes a plurality of elastic bodies 33 extending in the lateral direction X along the outer end edge 19b of the rear waist panel 19 and a plurality of elastic bodies 34 extending in the lateral direction X along the inner end edge 19a. Composed. A part of the elastic body 34 is arranged denser than the elastic body 33.

The hot melt adhesive for fixing the

elastic bodies

27 and 32 contains an elastomer and can be applied to the

elastic bodies

27 and 32 in a spiral shape. In this case, good contractibility of the

elastic bodies

27 and 32 is ensured.

The

elastic bodies

27 and 32 can be fixed to the front and

rear waist panels

18 and 19 by extending the elastic material at an expansion ratio of about 1.8 to 3.0 times with a wire diameter of about 400 to 1000 dtex. Further, the separation dimension (pitch, distance between the center portions of the elastic bodies) in the longitudinal direction Y between the elastic bodies is about 5.0 to 30.0 mm, preferably 6.0 to 15 mm. preferable.

The crotch panel 12 has a vertically long, substantially rectangular shape, and has a front end 12A connected to the non-skin facing surface (outer surface) of the front waist panel 18 and a rear end connected to the non-skin facing surface of the rear waist panel 19. A portion 12B and an intermediate portion 12C extending in the longitudinal direction Y between the front and rear end portions 12A and 12B. 4 and 5, the crotch panel 12 includes a base sheet 48, a liquid-absorbing structure 49 fixedly disposed on the skin-facing surface of the base sheet 48, and a liquid-absorbing structure 49. And a liquid-permeable body side liner 50 to be coated. The base sheet 48, the liquid-absorbent structure 49, and the body side liner 50 have the same length in the lateral direction X, and the side edges thereof coincide. As shown in FIG. 2, the front and rear end portions 12 </ b> A and 12 </ b> B of the crotch panel 12 extend in the lateral direction X formed from a fiber nonwoven fabric, and the longitudinal direction Y is smaller than the length in the longitudinal direction Y of the front and

rear waist panels

18 and 19. The front and

rear waist panels

18 and 19 are covered with the lengthwise inelastic front and rear reinforcing

cover sheets

80 and 81 under the extension in the lateral direction X. The front and rear reinforcing

cover sheets

80 and 81 may have a length in the longitudinal direction Y that indirectly covers the front and rear ends of the liquid-absorbing structure 49. When the front and rear reinforcing

cover sheets

80 and 81 have such a length, it is possible to suppress the front and rear end portions of the relatively rigid absorbent body of the liquid absorbent structure 49 from protruding outward. 2 and 5, the crotch panel 12 includes a central region 16 located in the center in the lateral direction X and both side regions 17 located on both sides in the lateral direction X. The central area 16 and the both side areas 17 are a fixed distance from the outer edge 12a of the crotch panel 12 toward the virtual longitudinal center line PP, preferably ¼ to 1 of the length of the central area 16 in the lateral direction X They are fixed by virtual folding lines 21 that are separated by a length of / 2. The both side areas 17 have both leg-around seal areas 20 defined by being bent from the virtual folding line 21 toward the virtual longitudinal center line PP. Note that the virtual folding line 21 is a virtual target for bending the both side regions 17 at the front and

rear end portions

12A and 12B of the crotch panel 12 when the diaper 10 is manufactured. In the wearing state of the diaper, along the virtual folding line 21 positioned between the front and

rear end portions

12A and 12B, the leg-surrounding seal area 20 is bent outwardly in cooperation with the central area 16 without being bent. .

As shown in FIG. 4, the base sheet 48 and the liquid-absorbing structure 49 are bonded to each other via a bonding area 90 provided with a hot melt adhesive (not shown) applied to the facing surfaces thereof. ing. Specifically, the liquid-absorbent structure 49 is fixed to the inner surface of the base sheet 48 at the

joint portions

91 and 92 located in the front and

rear waist regions

13 and 14, and the front and

rear waist regions

13 and 14 are worn while the diaper 10 is worn. The space is suspended from the inner surface of the base sheet 48.

Referring to FIGS. 2, 4 and 5, the base sheet 48 is a laminate of a fiber nonwoven fabric, at least one of which is substantially liquid-impervious, or from a laminate of a fiber nonwoven fabric and a liquid-impervious and breathable plastic film. The inner and outer

surface crotch sheets

51 and 52 are formed. The inner and outer

surface crotch sheets

51 and 52 are joined to each other via a hot melt adhesive (not shown) applied to at least one of them at intervals in the vertical direction Y and / or the horizontal direction X.

A plurality of thread-like, strand-like or string-like

elastic bodies

54 and 55 extending in the longitudinal direction Y are fixed to both side regions 48b (both leg seal regions 20) of the base sheet 48 so as to be contractible under expansion. It is elasticized at least in the longitudinal direction Y. As shown in FIG. 2, the elastic body 54 is curved toward the virtual longitudinal center line PP at the center of the crotch region 15 and extends in the direction around the wearer's leg when the diaper 10 is worn. The elastic body 55 extends linearly in the longitudinal direction Y along the inner edge 20a of the leg-hole sealing region 20. The

elastic bodies

54 and 55 are formed between the

sheets

51 and 52 via a hot melt adhesive (not shown) continuously applied in the longitudinal direction Y to at least one inner surface of the inner and outer

surface crotch sheets

51 and 52. It is fixed so as to be able to contract in a state of being stretched in the longitudinal direction Y.

The elastic body 54 has a substantially central portion protruding toward the virtual longitudinal center line PP, close to the other elastic body 55, and an elastic region by the

elastic bodies

54, 55 adjacent to each other, that is, The front and rear ends of the base sheet 48 positioned at the front and rear end portions of the crotch region 15 where the elongation stress of the elastic region on both sides of the base sheet positioned substantially at the center of the crotch region 15 is large. It is higher than the elongation stress of the elastic region in the part. Therefore, the contact pressure per unit area with respect to the wearer's thigh in the former elastic region is higher than that in the latter elastic region. As a result, the vicinity of the center of the leg seal region 20 to be in contact with the wearer's thigh is in close contact with the thigh, and leakage of excrement such as urine from the edge of the leg opening 23b can be effectively prevented.

When the material is a hydrophobic fiber, the body side liner 50 is a fiber non-woven sheet having a liquid permeability of a mass of about 15 to 35 g / m ² , preferably hydrophilized, for example, spunbond fibers It can form from various well-known fiber nonwoven fabrics, such as a nonwoven fabric, a point bond fiber nonwoven fabric, and an air through nonwoven fabric.

The liquid-absorbent structure 49 has a sheet-like form with a relatively small thickness. As shown in FIGS. 6 and 7, the upper sheet 60, the lower sheet 61, and the upper and lower sheets 60, both of which are fiber nonwoven fabrics. , 61 and a liquid-absorbing material layer 62 interposed therebetween. However, the thickness of the liquid absorbing material layer 62 is exaggerated. The “layer” of the liquid-absorbing material layer 62 does not necessarily mean that the liquid-absorbing material layer 62 is continuous in the vertical direction Y and / or the horizontal direction X. Therefore, it includes a state where individual particles 63 and particles 63 in which a plurality of particles are collected or combined are dispersed. The top sheet 60, the mass of about 8 ~ 15g / ^{m 2,} located on the skin facing side, preferably, is formed from a liquid-pervious fibrous nonwoven fabric mass about 10 g / ^{m 2.} Lower sheet 61, the mass of about 8 ~ 15g / ^{m 2} is located in the non-skin-facing side, preferably, is formed from a liquid permeable or NanToru solution of SMS nonwoven fabric of weight approximately 11g / ^{m 2.} The liquid-absorbing material layer 62 contains, for example, only so-called discrete liquid-absorbing polymer particles 63 that are water-insoluble and have a water-absorbing performance of 10 times or more of the self-mass, and other hydrophilic properties such as fluffed wood pulp. It does not have sex fibers. However, the absorbent polymer layer 63 may include hydrophilic fibers such as a small amount of wood pulp as long as the required absorbency and bulk can be maintained in the absorbent material layer 62, but the absorbent polymer particle 63 is at least part of the absorbent material layer 62. Preferably it contains about 70% by weight. Instead of this, the two

sheets

60 and 61 may fold a continuous fiber nonwoven fabric and wrap the liquid-absorbing material layer 62.

The liquid-absorbing structure 49 includes the liquid-absorbing polymer particles 63 that form the liquid-absorbing material layer 62, and an absorbent region 64 that is defined in a horizontally long and substantially rectangular shape that is spaced by a predetermined dimension in the vertical direction Y. And a sealing region 65 substantially free of liquid-absorbing polymer particles 63. In the seal region 65, the upper sheet 60 is joined to continuously surround the absorption region 64. In addition, in this embodiment, although the absorption area | region 64 is divided into eight areas, according to the absorption performance given to the liquid absorptive structure 49, the area and the number of areas can be changed suitably. Here, the fact that the liquid-absorbing polymer particles 63 are not substantially present means that the particles 63 may be present to such an extent that the sealing function is not inhibited. Incidentally, in the step of spraying the particles 63, the particles 63 of the degree described above may be sprayed on the seal region 65.

The liquid-absorbing structure 49 has a central area 41 and both side areas 42 as shown in FIGS. The central area 41 and both side areas 42 coincide with the central area 16 and both side areas 17 of the crotch panel 12 in the length in the lateral direction X. By the way, the above-mentioned both-legs seal area 20 will be described in more detail. Both side areas 42 of the liquid-absorbent structure 49, both side areas 48b of the base sheet 48, and

elastic bodies

54 and 55 located in the both side areas. The body side liner 50 is integrally formed with each other.

The absorption region 64 of the liquid-absorbent structure 49 extends in the lateral direction X from the central region 41 to the side regions 42 beyond the virtual folding line 21. In the absorption region 64, as shown in FIG. 7, the mass is about 30 to 300 g / m ² through the hot melt adhesive 66 applied to the inner surface of the lower sheet 61, preferably about the mass as a liquid-absorbing material. 40 to 280 g / m ² of the liquid-absorbing polymer particles 63 are fixed almost uniformly. In the absorption region 64, the upper sheet 60 and the lower sheet 61 may be partially fixed to each other or they may not be fixed to each other. When the hot melt adhesive 66 is used, the adhesive 66 may be applied to the inner surface of the upper sheet 60 without applying the hot melt adhesive 66 to the inner surface of the lower sheet 61, or the upper and lower sheets 60. , 61 may be coated with an adhesive 66, respectively.

In the sealing area 65, that is, the outer peripheral area of the liquid-absorbent structure 49 and the separation area between the absorbent areas 64, the upper and lower sheets 60 are interposed via the hot melt adhesive 67 continuously applied to the inner surface of the upper sheet 60. , 61 are joined together. Note that the adhesive 67 may be applied to the inner surface of the lower sheet 61 without applying the hot melt adhesive 67 to the inner surface of the upper sheet 60, or the adhesive 67 may be applied to both the upper and

lower sheets

60, 61. Each may be applied.

Thus, the liquid-absorbing structure 49 is formed of the liquid-absorbing material layer 62 containing at least about 70% by mass of the liquid-absorbing polymer particles 63 and the

sheets

60 and 61 that enclose the liquid-absorbing material layer 62. Compared with the case where the material layer 62 contains a relatively large amount of hydrophilic fibers such as fluff pulp in addition to the liquid-absorbing polymer particles 63, the material layer 62 is thin and highly plastic, and has excellent responsiveness to the movement of the crotch panel 12. ing. In addition, the upper and

lower sheets

60 and 61 are stably fixed in the seal region 65, thereby having a required peel strength and higher than when the entire inner surfaces of the upper and

lower sheets

60 and 61 are fixed. It can be said that it has flexibility. Further, since the liquid-absorbing polymer particles 63 are uniformly fixed in the absorption region 64, the distribution is not biased regardless of the wearer's movement and posture.

FIG. 8 is a cross-sectional view showing an extended state before the crotch panel 12 is bent along the virtual folding line 21. In the crotch panel 12, the base sheet 48 and the liquid-absorbent structure 49 are fixed only by the hot melt adhesive 47 on both side areas 48 b. However, the base sheet 48 and the liquid-absorbent structure 49 may be fixed at a part of the central region 48a as necessary.

FIG. 9 shows the crotch panel 12 when the diaper 10 is worn. The length dimension (length dimension of the outer periphery of the excrement accommodation space S) L2 from one inner edge 20a to the other inner edge 20b of the leg-hole seal region 20 is preferably about 380 to 450 mm. When the diaper 10 is worn, the leg-surrounding area 20 hits the wearer's thigh, and the crotch panel 12 can be in a form suspended from the elastic waist panel 11. When excrement is excreted in the crotch panel 12 in such a wearing state, the crotch panel 12 is separated from the wearer's buttocks except for its front and rear ends by its own mass, and the wearer and the liquid-absorbing structure 49 A waste storage space S for holding the waste is defined between the two. Therefore, the diaper 10 can hold a relatively large amount of excrement, and the crotch panel 12 is suspended in a hammock state away from the wearer's buttocks. It can suppress getting dirty.

Further, when the liquid-absorbing material layer 62 contains only the liquid-absorbing polymer particles 63, the liquid-absorbing structure 49 has a relatively large amount of hydrophilic properties such as fluff pulp in addition to the liquid-absorbing polymer particles 63. The absorbent structure 49 absorbs excrement such as urine not only from the skin facing surface side but also from the non-skin facing surface side because it is thinner than the liquid absorbent material layer 62 formed from the absorbent fibers. Since it is sheet-like and relatively flexible, it can easily respond to the movement of the wearer's body, and is suspended in the crotch panel 12 in its worn state. Further, since the liquid-absorbing structure 49 is relatively flexible, it responds to the movement of the base sheet 48, that is, bends together with the leg seal region 20 under the extension of the

elastic bodies

54 and 55, Before the excretion, the crotch panel 12 can exhibit a form in which it is swollen outward as a whole.

Referring to FIGS. 2 and 4 again, the crotch panel 12 is hot on the skin-facing surfaces of the front end portion 12A and the rear end portion 12B in a state where the both side regions 17 are bent to form both leg-hole seal regions 20. The front joint area 72 and the rear joint area 73 formed by applying the melt adhesive are connected to the non-skin facing surfaces of the front and

rear waist panels

18 and 19. Thus, by connecting the front and

rear end portions

12A and 12B of the crotch panel 12 to the non-skin facing surfaces of the front and

rear waist panels

18 and 19, compared to connecting them to the skin facing surfaces of the front and

rear waist panels

18 and 19, respectively. And the excrement accommodation space S can be formed large (refer FIG. 9). In addition, as long as the excrement accommodation space S has a required size, only one of the front and

rear waist regions

13 and 14 may be connected to the outer surface of the front and

rear waist panels

18 and 19.

As shown in FIG. 3, the crotch panel 12 has front and rear joining

areas

72 and 73 defined by a hot melt adhesive applied to the outer surface of the bent leg periphery sealing area 20. 15 having a concave pattern that opens toward 15 and having both side joints 74 formed by applying a hot-melt adhesive, and a central joint 75 that extends in the lateral direction X between both side joints 74. The central joint portion 75 is located outward in the longitudinal direction Y from the liquid absorbing structure 49. In this embodiment, both side joints 74 of the front joint region 72 have a stepped shape, and both side joints 74 of the rear joint region 73 have a rectangular shape, but are not limited to these shapes. The both side joining portions 74 of the front and rear joining

regions

72 and 73 may have various shapes such as a step shape, a rectangular shape, and a curved shape.

According to this diaper 10, the absorption region 64 of the liquid-absorbing structure 49 extends in the lateral direction X from the central region 41 beyond the virtual folding line 21 to both side regions 42 (both leg seal regions 20). Between 20, excrement such as urine can be absorbed also in the seal area 20 around both legs. Therefore, since the area which can absorb excrement can be enlarged, it can suppress that excrement collects between both leg circumference seal fields 20, and can control that excrement leaks.

FIG. 10 shows a liquid absorbent structure 149 as a modification of the liquid absorbent structure 49 shown in FIG. Since the basic configuration of this modification is the same as the liquid-absorbing structure 49 shown in FIG. 6, the same portions are denoted by the same reference numerals, description thereof is omitted, and only differences are described below. explain.
In the liquid-absorbing structure 149, the liquid-absorbing polymer particles 63 hardly exist on the virtual folding line 21. In other words, the density of the liquid-absorbing polymer particles 63 on the virtual folding line 21 is extremely lower than the density of the adjacent portions in the lateral direction X.
According to the diaper 10, the density of the liquid-absorbing polymer particles 63 on the virtual folding line 21 is extremely lower than the density of the adjacent parts in the lateral direction X, so that it is easy to bend the virtual folding line 21.
A seal region extending in the vertical direction Y along the virtual folding line 21 may be formed. If the seal region is formed in this way, the seal region can be the starting point, and the both-legs seal region 20 can be easily raised toward the wearer's skin.
In the liquid absorbent structure 149 of the diaper 10, the density of the liquid absorbent polymer particles 63 in the both side regions 42 is higher than the density of the liquid absorbent polymer particles 63 in the central region 41.

According to this diaper 10, since the density of the liquid-absorbing polymer particles 63 in both side regions 42 of the liquid-absorbing structure 149 is higher than the density of the liquid-absorbing polymer particles 63 in the central region 41, excrement such as urine. In the early stage of excretion, excrement can be absorbed also in the leg seal area 20, and after the required excretion is absorbed, gel block tends to occur in the both side areas 42. Therefore, it is possible to easily generate a gel block in the leg-hole seal region 20 and prevent excrement from leaking outside the leg-hole seal region 20.

In addition to the materials described in the present specification, various known materials that are usually used in this type of article can be used without limitation for the constituent members constituting the diaper 10.

The disclosure relating to the present invention described above can be summarized in at least the following matters.
A disposable wearing article 10 according to the present invention has a longitudinal direction Y and a transverse direction X along a longitudinal center line PP, a skin facing surface and a non-skin facing surface, a front waist region 13, a rear waist region 14, The crotch region 15 located between the front and

rear waist regions

13 and 14, the front and

rear waist regions

13 and 14 are defined, and the elastic waist panel 11 formed from the front and

rear waist panels

18 and 19, and is connected to the elastic waist panel 11. The crotch panel 12 includes a liquid-absorbent structure 49 that defines the crotch region 15 and is interposed between the base sheet 48 and the liquid-permeable body-side liner 50 and a pair of leg-hole seal regions 20 located on both sides thereof. Including.

In the present invention, the crotch panel 12 is defined by a virtual folding line 21 that is a predetermined distance away from the front and

rear end portions

12A and 12B and both side edges 12a of the crotch panel 12 toward the longitudinal center line PP. It has a first central region 16 and first side regions 17 in X. The liquid-absorbing structure 49 is formed in a sheet shape, and includes at least liquid-absorbing polymer particles 63 interposed between the liquid-permeable upper sheet 60, the lower sheet 61, and the upper and

lower sheets

60, 61. A liquid absorbing material layer 62 contained therein, a second central region 41 located on the first central region 16, a second both side region 42 located on the first both side region 17, and the first And at least one absorption region 64 extending from the two central regions 41 to the second side regions 42. The first side regions 17 of the crotch panel 12 have at least the side portions of the base sheet 48, the side portions of the body side liner 50, and the liquid absorbing structure 49 at least at the front and

rear end portions

12A and 12B. Along with the second side areas 42, both leg-around seal areas 20 are formed by being bent from the virtual folding line 21 toward the longitudinal center line PP, and are connected to the front and

rear waist panels

13, 14. . The leg seal areas 20 are separated from the body-side liner 50 toward the wearer's thigh by contraction.

The present invention can include at least the following embodiments.
(1) The both-legs seal area 20 is elasticized by an elastic body attached so as to be able to contract under expansion along both side edges of the base sheet 48.
(2) The side edges of the base sheet 48, the liquid-absorbent structure 49, and the body-side liner 50 are coincident with each other at the side edges of the both-legs-sealing area 20.
(3) In the absorption region 64, the density of the liquid-absorbing polymer particles 63 is lower than the density of adjacent portions in the lateral direction X on the virtual folding line 21.
(4) The density of the liquid-absorbing polymer particles 63 in the second side regions 42 is higher than the density of the liquid-absorbing polymer particles 63 in the second central region 41.
(5) The front and

rear end portions

12A and 12B of the crotch panel 12 in the vertical direction Y are attached to the non-skin facing surface side of the front and

rear waist panels

18 and 19.
(6) The upper and

lower seats

60 and 61 are also sealed in the sealing region 65 in the region between the absorption regions 64 and the outer peripheral region of the group of absorption regions.

10 Disposable wearing articles (disposable diapers)
DESCRIPTION OF SYMBOLS 11 Elastic waist panel 12 Crotch panel 12A Front end part 12B Rear end part 13 Front waist area 14 Rear waist area 15 Crotch area 18 Front waist panel 19 Rear waist panel 20 Leg circumference seal area 21 Virtual folding line 41 Central area 42 Both sides area 60 Upper part Sheet (upper fiber nonwoven fabric)
61 Lower sheet (lower fiber nonwoven fabric)
62 Liquid-absorbing material layer 63 Liquid-absorbing polymer particles 64 Absorbing region 65 Sealing region X Horizontal direction Y Vertical direction

Claims

A crotch region having a longitudinal direction along the longitudinal center line and a lateral direction perpendicular thereto, a skin facing surface and a non-skin facing surface, a front waist region, a rear waist region, and the front and rear waist regions; An elastic waist panel that defines the front and rear waist regions, and an elastic waist panel that is formed from the front and rear waist panels, and is connected to the elastic waist panel to define the crotch region and is interposed between the base sheet and the body side liner A disposable wearing article including a structure and a crotch panel having a pair of leg-hole seal areas,
The crotch panel has a first central region and a first both side regions in the lateral direction, which are defined by virtual folding lines that are separated from the front and rear end portions and both side edges of the crotch panel by a certain distance from the longitudinal center line. And
The liquid-absorbing structure is formed in a sheet shape, and is interposed between a liquid-permeable upper sheet, a lower sheet, and the upper and lower sheets. A liquid-absorbing material layer containing at least liquid-absorbing polymer particles, a second central region located on the first central region, a second two-side region located on the first two-side region, and Having at least one absorption region extending from the second central region to the second side regions;
The first side regions of the crotch panel are at least at the front and rear end portions, together with both side portions of the base sheet, both side portions of the body side liner, and the second both side regions of the liquid-absorbing structure. A seal area around both legs is formed by bending from the virtual folding line to the longitudinal center line side, and connected to the front and back waist panels,
The worn article according to claim 1, wherein the both leg-hole seal areas are separated from the body-side liner toward the wearer's thigh by contraction.
The wearing article according to claim 1, wherein the sealing area around the legs is elasticized by an elastic body attached so as to be capable of contraction under extension along both side edges of the base sheet.
The wearing article according to claim 1 or 2, wherein each side edge of the base sheet, the liquid-absorbent structure, and the body side liner coincides with each other at the side edges of the seal areas around the legs.
The wearing article according to any one of claims 1 to 3, wherein in the absorption region, the density of the liquid-absorbing polymer particles is lower than the density of adjacent portions in the lateral direction on the virtual folding line.
The wearing article according to any one of claims 1 to 4, wherein a density of the liquid-absorbing polymer particles in the both side portions is higher than a density of the liquid-absorbing polymer particles in the central portion.
The wearing article according to any one of claims 1 to 5, wherein front and rear end portions of the crotch panel in the longitudinal direction are attached to a non-skin facing surface side of the front and rear waist panel.
The wearing article according to any one of claims 1 to 6, wherein the absorbent region and a seal region that seals between the absorbent regions are alternately arranged in the longitudinal direction.