WO2017037909A1

WO2017037909A1 - Disposable wearable article

Info

Publication number: WO2017037909A1
Application number: PCT/JP2015/075050
Authority: WO
Inventors: 瞳中尾; 祐介川上; 直敬三村
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-08-31
Filing date: 2015-09-03
Publication date: 2017-03-09
Also published as: JP5839760B1; CN107920924B; TWI711440B; JP2017046792A; MY186289A; TW201713290A; KR20180048594A; CN107920924A

Abstract

Provided is a disposable wearable article capable of maintaining a state in which the buttocks are covered at a rear-waist-panel side of a crotch region. This nappy (10) includes: a front waist panel (14); a rear waist panel (15); an absorption panel (16) between the front and rear waist panels; and a pair of leakage-prevention cuffs (60) which extend in the vertical direction (Y) at a skin-facing surface side of the absorption panel (16). The leakage-prevention cuffs (60) are provided with: proximal sections (62); and distal sections (63) in which a plurality of strip-like cuff elastic bodies (64) are disposed. Side extension sections (61) which are provided with a plurality of strip-like leg elastic bodies (65), and which extend in the vertical direction (Y) are positioned outside the proximal sections (62) in the horizontal direction (X). The number of sheets forming the side extension sections (61) is greater than the number of sheets forming the leakage-prevention cuffs (60). The elongation scale factor of the leg elastic bodies (65) is smaller than that of the cuff elastic bodies (64). The spacing dimension (W7) between the leg elastic bodies (65) in the horizontal direction (X) is greater than the spacing dimension (W6) between the cuff elastic bodies (64) in the horizontal direction (X).

Description

Disposable Wearables

The present invention relates to disposable wearing articles.

In Patent Document 1, a front waist panel forming a front waist region, a rear waist panel forming a rear waist region, an absorbent panel positioned between the front and rear waist panels to form a crotch region, a liquid absorbent core There is disclosed a disposable wearing article including a pair of leakproof cuffs extending in the longitudinal direction on the skin-facing surface side of the absorbent panel.

Japanese Patent Application Publication No. 2006-525858 (P2006-525858)

In the wearing article disclosed in Patent Document 1, the front waist panel and the rear waist panel are the same shape and size, and between the barrier cuff elastic material of the barrier leg cuffs in the crotch panel and the leg elastic material of the elastic leg cuffs, There is a possibility that the covering of the buttocks by the rear waist panel side of the crotch area is not sufficient and the state of covering the buttocks can not be maintained.

Therefore, an object of the present invention is to provide a disposable wearing article which is an improvement of the prior art and can maintain the state in which the buttocks are covered by the rear waist panel side of the crotch area.

In order to achieve the above object, the present invention has a front waist panel having a skin-facing surface and a non-skin-facing surface, a front waist region, having a longitudinal direction and a lateral direction, and a thickness direction, and a rear waist A rear waist panel forming an area, an absorbent panel positioned between the front and rear waist panels to form a crotch area, a liquid absorbent core, and a pair extending in the longitudinal direction on the skin facing surface side of the absorbent panel And a leak-proof cuff.

The disposable wearing article according to the present invention further includes the following configuration. The leakproof cuff has the longitudinally extending proximal portion and the distal portion, and the longitudinally expandable cuff elastic body is disposed. The longitudinally extending side extension portion having a leg elastic body is located outside the lateral direction of the proximal portion. The number of sheets forming the side extension portion is larger than the number of sheets forming the leakproof cuff. The cuff elastic body that can expand and contract in the longitudinal direction is disposed in the side extension portion. The stretch ratio of the leg elastics is smaller than the stretch ratio of the cuff elastics, and the lateral separation dimension between the leg elastics is larger than the lateral separation dimension of the cuff elastics.

The number of gathers formed per unit area of the side extension portion is smaller than the number of gathers formed per unit area of the leakproof cuff. According to the worn article, a space can be formed between the side extension and the leakproof cuff, and the air permeability of the worn article can be improved.

The absorbent panel has front and rear end portions located on the front and rear waist panels, and the front and rear waist panels each have a plurality of front and rear waist elastic bodies extending in the lateral direction, and the front waist elastic body The extensional stress of the elastic body overlapping each other in plan view with the front end portion of the absorbent panel is greater than the extensional stress of the elastic body overlapping each other in plan view with the rear end portion of the absorption panel of the rear waist elastic body. high. According to such a wearing article, since the lateral dimension of the rear waist panel is larger than the lateral dimension of the front waist panel, it is possible to reliably cover the buttocks.

The side extending portion has a liquid diffusive layer and a hydrophobic layer covering the liquid diffusive layer in the thickness direction. According to such a wearing article, since the liquid diffusive layer can hold excrement while preventing the leakage of excrement such as urine from both lateral edges of the absorption panel by the hydrophobic layer, the excrement Absorbent capacity can be increased.

It further has a liquid-permeable inner sheet covering the skin-facing surface side of the liquid-absorbent core, and the liquid diffusive layer further extends outward in the lateral direction from both side edges of the liquid-absorbent core And an extended portion of the inner sheet. According to such a wearing article, since the excrement can be held at the extended portion of the inner sheet, the absorption capacity of the excrement can be further increased.

The liquid crystal display further includes a core cover sheet for the liquid absorbent core, and the liquid diffusive layer extends from the both side edges of the liquid absorbent core further outward in the lateral direction. Have. According to such a wearing article, since the excrement can be held at the extended portion of the core cover sheet, the absorption capacity of the excrement can be further increased.

The extension portion of the inner surface sheet is bent toward the non-skin opposing surface side of the liquid-absorbent core along the longitudinally extending bending line. According to such a wearing article, excrement can be held even at a portion where the inner sheet is bent, and therefore, the absorption capacity of excrement can be further increased.

According to the disposable wearing article according to one or more embodiments of the present invention, since the number of sheets forming the side extension portion is larger than the number of sheets forming the leakproof cuff, the side extension portion Stiffness is higher than the stiffness of the leakproof cuffs. In addition, the extension ratio of the leg elastics is smaller than the extension ratio of the cuff elastics, and the lateral separation dimension between the leg elastics is greater than the lateral separation dimension of the cuff elastics. Because of the large size, it is possible to prevent the side extension from entering inward in the lateral direction, and it is possible to maintain the state in which the buttocks are covered by the side extension.

The drawings illustrate certain embodiments of the present invention according to the present disclosure and include not only the essential features of the invention, but also optional and preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the disposable diaper shown as an example of the disposable wearing article which concerns on this indication. The partially broken development top view which looked the diaper from the skin opposing surface side. (A) The figure which shows the bending aspect of a coating sheet. (B) The figure which shows the state which has arrange | positioned the liquid absorption structure on the skin opposing surface side of a coating sheet, (c) The figure which shows the arrangement | positioning aspect of each joining area of the both sides of a coating sheet. Sectional drawing in alignment with the IV-IV line of FIG. FIG. 5 is a partial enlarged view of a region surrounded by a V line in FIG. 4. The enlarged view of the leg opening edge in a wearing condition. The figure similar to FIG. 5 in a 1st modification. The figure similar to FIG. 5 in a 2nd modification.

The following embodiment relates to the disposable diaper 10 according to this embodiment shown in FIGS. 1 to 8 which is an example of the present invention, and includes not only the essential configuration of the invention but also selective and preferable configurations. In FIGS. 2 and 3, each elastic body described later resists its contraction force, and the contraction force in the transverse direction X and the longitudinal direction Y makes the gather produced on the member to which each elastic body is attached natural. It is in a state of being stretched to such an extent that it appears to be substantially lost by vision.

1 to 3, a disposable diaper 10 which is an example of a disposable wearing article according to the present invention has a longitudinal direction Y and a transverse direction X intersecting therewith, a thickness direction Z, a skin facing surface and the opposite side thereof Of the non-skin facing surface of the skin, the longitudinal center line P which bisects the longitudinal dimension of the transverse direction X, and the transverse central line Q which bisects the longitudinal dimension of the longitudinal direction Y It is substantially symmetrical and includes a front waist region 11, a rear waist region 12, and a crotch region 13 located between the front waist region 11 and the rear waist region 12.

The diaper 10 extends in the longitudinal direction Y between the front waist panel 14 forming the front waist region 11, the rear waist panel 15 forming the rear waist region 12, and the front and

rear waist panels

14 and 15 to form the crotch region 13 And an absorbent panel 16. The front waist panel 14 and the rear waist panel 15 are formed in the same shape and size, for example. The absorbent panel 16 has a front end 19A located on the skin facing surface side of the front waist area 11, a rear end 19B located on the skin facing surface of the rear waist area 12, and an intermediate located between the front and rear ends 19A and 19B. And 19C. In the present embodiment, the front and rear end portions 19A and 19B of the absorbent panel 16 are positioned and fixed on the skin facing surface side of the front and

rear waist regions

11 and 12, respectively, but the front and rear end portions 19A and 19B are front and rear waist regions The absorbent panel 16 may be fixed to the outer surface of the front and

rear waist panels

14 and 15 so as to be positioned on the non-skin facing

surfaces

11 and 12.

The side edges of the front waist region 11 and the side edges of the rear waist region 12 are joined to each other by a plurality of seams 25 arranged intermittently in the longitudinal direction Y, and a waist opening 26 and a pair of leg openings 27 are defined. It is done. The seam 25 can be formed by bonding means using various adhesives such as hot melt adhesive, heat sealing, various known bonding means using welding means such as sonic, or a combination thereof.

The front waist panel 14 has an inner edge (an inner edge of the front waist region) 14a which forms a part of the front leg opening, and an outer edge (an outer edge of the front waist region) 14b which forms the front waist opening. , Between the inner and

outer end edges

14a, 14b, it has a horizontally long rectangular shape defined by both

side edges

14c, 14d (both side edges of the front waist region) extending in the longitudinal direction Y. In addition, the front waist panel 14 has a liquid-impervious inner layer sheet 17 located on the skin-facing surface side, a liquid-impervious outer layer sheet 18 located on the non-skin facing surface side, and the inner and

outer layer sheets

17 and 18. And a plurality of strand-like or string-like front waist elastic bodies 20 disposed contractible in an extended state in the lateral direction X.

The rear waist panel 15 has an inner edge (a rear waist region inner edge) 15a which forms a part of a rear leg opening, and an outer edge (a rear waist region outer edge) 15b which forms a rear waist opening , And both side edges (both side edges of the rear waist region) 15c, 15d extending in the longitudinal direction Y between the inner and

outer end edges

15a, 15b. The rear waist panel 15 has a liquid-impervious inner layer sheet 21 located on the skin-facing surface side, a liquid-impervious outer layer sheet 22 located on the non-skin-facing surface side, and the inner and

outer layer sheets

21 and 22 And a plurality of strand-like or string-like back waist elastic bodies 23 disposed contractible in the state of extension in the lateral direction X.

The front waist elastic body 20 has a plurality of front upper waist elastic bodies 20A extending in the lateral direction X along the outer edge 14b, and a front lower waist located between the front upper waist elastic body 20A and the inner edge 14a. And an elastic body 20B. The rear waist elastic body 23 has a plurality of rear upper waist elastic bodies 23A extending in the lateral direction X along the outer edge 15b, and a rear lower waist located between the rear upper waist elastic body 23A and the inner end edge 15a. And an elastic body 23B. The front lower waist elastic body 20B is positioned to overlap with the front end 19A of the absorbent panel 16 and the diaper 10 in plan view, and the rear lower waist elastic body 23B is mutually overlapped with the rear end 19B of the absorbent panel 16 in plan view It is located to overlap.

The inner and

outer layer sheets

17, 18, 21 and 22 of the front and

rear waist panels

14 and 15 are liquid-impervious, preferably moisture-permeable, and have a mass of 10 to 40 g / m ² and a fiber density of 0.03 to 0 Various known fiber non-woven fabrics can be used, including 1 g / cm ³ of spunbond non-woven fabric, SMS (spun bond, meltblown and spunbond) fiber non-woven fabric, air-through fiber non-woven fabric and the like.

In the front and

rear waist elastics

20 and 23, for example, the front and rear

upper waist elastics

20A and 23A have a fineness of 600 to 1200 dtex, and are arranged so as to be contractible in a state of being stretched 2.5 to 3.5 times A string or strand of elastic material can be used. In addition, as the front and rear lower waist

elastic bodies

20B and 23B, for example, a string shape or a strand shape having a fineness of 400 to 800 dtex and arranged to be contractible in a state of being stretched 1.5 to 3.0 times Elastic materials can be used. Various conditions such as the fineness of the front and rear waist elastics 20 and 23, the stretching magnification, and the separation dimension (pitch) between the elastics can be changed as needed, but the wearer's In order to be stably worn on the body, the stretching stress of the stretch area by the front and rear upper waist

elastic bodies

20A, 23A is higher than the stretching stress of the stretch area by the front and rear lower waist

elastic bodies

20B, 23B. It is preferable to set the conditions. Also, as long as the required elastic force can be applied to the front and

rear waist regions

11 and 12, instead of or together with the front and rear waist elastics 20 and 23, the elastic stretchable sheet is applied to the inner surface side of the front and

rear waist regions

11 and 12 It may be disposed on the outer surface side. By arranging the front and rear waist elastics 20, 23 on the entire outer surface of the diaper 10, a plurality of gathers are formed on the outer surface, and are gathered as a whole.

Referring to FIG. 2, the dimension W1 in the lateral direction X of the diaper 10 is 550 to 740 mm, and the dimension L1 in the longitudinal direction Y of the side edges of the front and

rear waist regions

11 and 12 is 160 to 210 mm. Further, the dimension W2 in the lateral direction X of the absorbing panel 16 is 150 to 220 mm. Accordingly, the dimension W2 in the transverse direction X of the absorbent panel 16 is 27 to 36% of the dimension W1 in the transverse direction X of the diaper 10, and the absorbent panel compared to a general diaper (particularly for adults). It can be said that 16 is narrow.

Absorbent panel 16 is a vertical rectangular shape defined by front and

rear end edges

16a, 16b and both

side edges

16c, 16d, and front and rear end portions 19A, 19B are, for example, hot on the skin facing surface of front and

rear waist panels

14, 15. They are joined together via a front and back joint area (not shown) to which a melt adhesive has been applied. The application pattern of the hot melt adhesive in the front and rear joint area may adopt, for example, various known shapes such as Ω shape, spiral shape, and wave shape in addition to a plurality of line shapes extending in the longitudinal direction Y.

Referring to FIGS. 2 and 3, the absorbent panel 16 is a liquid-absorbent structure 30 composed of a hydrophilic / liquid-permeable inner sheet (body-side liner) 31 and an absorbent body 33 positioned on the skin-facing surface side. A hydrophobic covering sheet 32 positioned on the non-skin facing surface side of the liquid absorbent structure 30, and a hydrophobicity or a size that covers at least the bottom of the non-skin facing surface of the liquid absorbent structure 30; And an impervious leak-proof film 34. The absorber 33 has a liquid-absorbent core 35 and a core cover sheet 36 which covers the whole of the liquid-absorbent core 35.

The liquid-absorbent core 35 is a semi-rigid panel shaped into a required shape, and extends toward the longitudinal centerline P between the front and rear edges extending in the lateral direction X and the front and rear edges (horizontal direction X And both

side edges

35c, 35d extending in a convex manner. Also, the absorbent core 35 is formed of a mixture of wood fluff pulp and superabsorbent polymer particles (SAP). When the worn article is used as a diaper for adults and for light incontinence, the thickness dimension of the absorbent core 35 is preferably relatively small, for example, the mass of SAP relative to the mass of wood fluff pulp By making it as small as possible, the thickness dimension may be reduced while maintaining the required liquid absorption amount, or the liquid-absorbent core 35 may be formed only of SAP.

The inner surface sheet 31 and the core cover sheet 36 are formed of a sheet material having hydrophilicity and liquid diffusibility, and for example, a hydrophilized spunbonded nonwoven fabric having a mass of 15 to 25 g / m ² , It can form from a SMS fiber nonwoven fabric etc. The core cover sheet 36 may be formed of the same type of sheet material as the inner surface sheet 31 but is preferably formed of tissue paper. In addition, the thickness dimension may be smaller than that of the inner sheet 31 and may be a thickness dimension that achieves a strength that can hold the liquid-absorbent core 35 in a required shape. The cover sheet 32 is formed of a hydrophobic or substantially liquid-impervious sheet material, and is formed of, for example, an SMS fiber nonwoven fabric, a spunbond nonwoven fabric, or the like having a mass of 15 to 30 g / m ² . The leakproof film 34 is preferably formed of a hydrophobic sheet material having moisture permeability, for example, a moisture-permeable plastic film having a mass of 10 to 25 g / m ² .

Referring to FIGS. 4 and 5, in the liquid absorbent structure 30, the inner sheet 31 covering the skin facing surface side of the liquid absorbent core 35 further extends in the lateral direction X from the side edges 35c and 35d of the liquid absorbent core 35. Extends to the outside of the Specifically, the inner surface sheet 31 extends from the side edges 35c, 35d of the absorbent core 35 to the vicinity of the side edges 16c, 16d of the absorbent panel 16 and extends in the longitudinal direction Y along the side edges 16c, 16d of the absorbent panel 16. After being bent along the bending line 31c extending to the side, it extends toward the longitudinal center line P, and the outer edge 31b thereof is located on the non-skin opposing surface side of the liquid-absorbent core 35. Further, the core cover sheet 36 which covers the liquid absorbent core 35 has an outer size which is larger than the outer dimensions of the liquid absorbent core 35. The inner sheet 31 and the core cover sheet 36 respectively have extending

portions

31A, 36A extending outward in the lateral direction X from the side edges 35c, 35d of the liquid absorbent core 35, and these extending

portions

31A, 36A A hydrophilic layer (liquid diffusive layer) 50 is formed on the outer side of the liquid absorbent core 35 in the lateral direction X.

The hydrophilic layer 50 has a four-layer structure because it is formed of the

extension portions

31A and 36A in which the inner surface sheet 31 and the core cover sheet 36 are folded. However, the extension part 31A of the inner sheet 31 and the extension part 36A of the core cover sheet 36 may have a two-layer structure instead of the four-layer structure, as long as they have the required liquid retention performance. The layer 50 may be formed of only the extending portion 31A of the inner sheet 31. Further, since both side edges 35c and 35d of the liquid-absorbent core 35 have a concave shape, the hydrophilic layer 50 has the largest dimension W5 in the lateral direction X at the central portion of the crotch region 13, and the front and rear waist In the

regions

11 and 12, the dimension W5 is the smallest.

3 (a) is a view showing a bending mode of the cover sheet 32, FIG. 3 (b) is a view showing a state in which the liquid absorbing structure 30 is disposed on the cover sheet 32, and FIG. 3 (c) is a cover FIG. 7 is a view showing an arrangement of bonding areas 46 to 48 of both side portions 42 of a sheet 32. 3 (a) to 3 (c) illustrate the assembly process of the absorbent panel 16, but other assembly processes are adopted as long as the both side edges of the absorbent panel 16 have the laminated structure shown in FIG. You may Further, in FIG. 4, for convenience of description, the side portion 42 of the covering sheet 32 is laid on the side of the side edge 16 c of the absorbing panel 16, the side portions 42 of the covering sheet 32 on the side of the other side edge 16 d of the absorbing panel 16. Indicates a standing state (wearing state).

Referring to FIG. 3A, the covering sheet 32 is located at the outermost position in the lateral direction X, and a first bending line 43 extending in the longitudinal direction Y and an inner side of the first bending line 43. And a second bending line 44. The cover sheet 32 is bent toward the longitudinal center line P along the first bending line 43. In addition, the covering sheet 32 is positioned outside the main body 41 on which the leakproof film 34 is disposed, and the second bending line 44 extending in the longitudinal direction Y along the side edges of the leakproof film 34 in the lateral direction X. And both sides 42. Both side portions 42 are bent toward the longitudinal center line P along the second bending line 44 and overlapped with the main portion 41.

Referring to FIG. 3B, in the covering sheet 32 in a state in which only the first bending line 43 in FIG. 3A is bent, the liquid absorbing structure 30 is disposed on the skin facing surface side. With the liquid absorbing structure 30 disposed on the covering sheet 32, the two side portions 42 of the covering sheet 32 further extend along a second bending line 44 extending in the longitudinal direction Y along the side edges of the liquid absorbing structure 30. It is bent to the longitudinal center line P side.

Referring to FIG. 3C and FIGS. 4 and 5, in the state of being bent along the second bending line 44, a portion of the both sides 42 folded on the skin facing surface side of the hydrophilic layer 50. The outer joint area 46 extending in the longitudinal direction Y along the side edges 16 c and 16 d of the absorbent panel 16 and the inner joint area 47 located inside the lateral direction X of the outer joint area 46 It is fixed via an end joint area 48 located further inside in the lateral direction X of the inner joint area 47. Further, the outer edge portion located on the non-skin facing surface side of the hydrophilic layer 50 is bonded to the non-skin facing surface side of the hydrophilic layer 50 via the bonding area 49 opposed to the outer bonding area 46 in the thickness direction. Ru. Although not shown, unless otherwise specified in the present specification, the sheets laminated in the thickness direction Z are fixed by an adhesive applied to at least one of the facing surfaces of the sheets. It is done.

Referring to FIG. 3 (b) and FIGS. 4 and 5, between the cover sheets 32 in the bent state at both side portions 42, a plurality of strings or the like extending in the longitudinal direction Y along the second bending line 44 A strand-like cuff elastic body 64 is disposed so as to be contractible in an extended state. Further, on the outer edge side of the covering sheet 32, a plurality of string-like or strand-like leg elastic bodies (gasket cuff elastic bodies) 65 extending in the longitudinal direction Y between the side portions 42 and the leakproof film 34. Is attached retractably in the extended state.

For the cuff elastic body 64, for example, an elastic material is used in a state where the fineness is 470 to 740 dtex, and the state after being contracted or relaxed is stretched by 2.5 to 3.2 times and fixed. Referring to FIG. 4, the separation dimension W6 in the lateral direction X of the cuff elastic body 64 is 3 to 8 mm.

The leg elastic body 65 has, for example, a fineness of 470 to 740 dtex, and an elastic material is used in a state of being stretched and fixed 1.7 to 2.3 times from a contracted or relaxed state. A separation dimension W7 in the lateral direction X of the leg elastic body 65 is 10 to 15 mm.

The extension ratio of the leg elastics 65 is smaller than the extension ratio of the cuff elastics 64. Further, the separation dimension W7 of the leg elastic body 65 in the lateral direction X is larger than the separation dimension W6 of the cuff elastic body 64 in the lateral direction X.

With reference to FIGS. 4 and 5, the absorbing panel 16 has a pair of leakproof cuffs 60 extending in the longitudinal direction Y and a pair of sides positioned outside the transverse direction X of the leakproof cuffs 60 by having such a configuration. And an extending portion (gasket cuff) 61. The leakproof cuff 60 has a two-layer structure composed of two coated sheets 32 bent at the first bending line 43. In other words, the leak-barrier cuff 60 is composed of the two covering sheets 32. The leak-barrier cuffs 60 are fixed to the inner sheet 31 via the inner joint area 47 and both end fixing parts fixed to the inner sheet 31 through the end joint area 48 of the both sides 42 of the covering sheet 32. It has a proximal portion 62 extending in the longitudinal direction Y, and a distal portion 63 extending in the longitudinal direction Y between the two end fixing portions and extending in the longitudinal direction Y parallel to the proximal portion 62. Since the cuff elastic body 64 is disposed at the distal portion 63 so as to be contractible in an extended state, the edge portion of the cuff elastic body 64 is contracted from the inner surface sheet 31 by the contraction of the cuff elastic body 64 in the worn state. Separating to the body side and fitting the wearer's thighs to prevent fluid leakage.

In the present embodiment, the leak-barrier cuffs 60 and a part of the side extension 61 are formed of the cover sheet 32, but the leak-barrier cuffs 60 are formed of a sheet material separate from the cover sheet 32. It is also good. In such a case, since the leakage preventing cuffs 60 mainly prevent leakage of body fluid, they are not necessarily formed of a liquid impermeable sheet. For example, it may be formed of a liquid-impermeable sheet.

Referring to FIGS. 4 and 5, the side extension 61 of the absorbent panel 16 is made hydrophilic with the hydrophilic layer 50 formed of the extension 31A of the inner sheet 31 and the extension 36A of the core cover sheet 36. And

hydrophobic layers

51 and 52 covering the thickness layer 50 in the thickness direction Z. The

hydrophobic layers

51 and 52 are a first hydrophobic layer (lower layer) 51 covering the non-skin opposing surface side of the hydrophilic layer 50 and a second hydrophobic layer covering the skin opposing edge side of the hydrophilic layer 50. (Upper layer) 52. The first hydrophobic layer 51 has a three-layer structure composed of the main part 41 of the cover sheet 32, the outer edge 42A and the leakproof film 34, and the second hydrophobic layer 52 is of the cover sheet 32. It has a two-layer structure composed of two folded side portions 42. The hydrophilic layer 50 has a four-layer structure of two folded inner sheet 31 and two folded core cover sheets 36. That is, the number of sheets constituting the side extending portion 61 is nine. Between the side edge of the leakproof film 34 forming the first hydrophobic layer 51 and the outer edge 42A of the covering sheet 32, a plurality of leg elastic bodies 65 are attached in an expandable state so as to be contractible. . The side extension portion 61 of the absorbing panel 16 has elasticity in at least the longitudinal direction Y by the contraction action of the leg elastic body 65 located in the first hydrophobic layer 51.

According to the diaper 10 of the present embodiment, since the number of sheets forming the side extending portion 61 is larger than the number of sheets forming the leakage preventing cuff 60, the rigidity of the side extending portion 61 is the leakage preventing cuff 60 Higher than the rigidity of In addition, the extension ratio of the leg elastics 65 is smaller than the extension ratio of the cuff elastics 64, and the separation dimension in the lateral direction X between the leg elastics 65 is more than the separation dimension in the lateral direction X between the cuff elastics 64. Too big. When the side extension is a single layer or a laminated structure of two or three layers, there is a risk that the side extension may be worn during wearing on the rear waist region side of the crotch region to expose the buttocks, The relatively high rigidity of the side extension 61 allows the side extension 61 to abut on the body in a stable manner, so that the side extension 61 can be prevented from entering the inside in the lateral direction X, and the absorption panel The rear waist region 12 side of 16 can maintain the state of covering the buttocks. Moreover, since the extension magnification of the leg elastic body 65 is smaller than the expansion magnification of the cuff elastic body 64, the side extension portion 61 does not stand up toward the body together with the leakproof cuff 60, to the outside in the lateral direction X Since it becomes an aspect which protruded, it can be made to contact | abut planarly to the inner side of a thigh. Also, in the diaper having the buttocks cover at the lower end of the back waist panel, the flap-like buttocks cover is worn by the wearer in the wearing state by making the size of the back waist area larger than the size of the front waist area in the longitudinal direction. When wearing clothes that fit the body, a step-like line between the body and the diaper due to the biting is visually recognized from above the clothes, particularly for women. It may cause resistance to wear. In the diaper 10 according to the present embodiment, since the side extension 61 has relatively high rigidity, in the wearing state, the rear waist region 12 side of the crotch region 13 covering the buttocks hardly bites into the body, and the body fits Even if the user wears the clothes, the step-like line by the diaper 10 and the body is not visually recognized from the top of the clothes, and the wearer who wears the diaper 10 for the first time reduces the feeling of resistance to wearing Can.

In addition, since the separation dimension (pitch) in the lateral direction X between the leg elastic bodies 65 is larger than the separation dimension (pitch) in the lateral direction between the cuff elastic bodies 64, the gathers formed in the side extension portions 61 ( The weir 61 a is larger than the gather 60 a formed on the distal portion 63 of the leakproof cuff 60. Since a plurality of relatively large gathers 61 a are formed in the side extension 61, a plurality of gaps serving as a flow path of air are formed between the thigh and the side extension 61, and the diaper 10 It can effectively prevent the internal stuffiness of Further, since the side extension portion 61 has a multilayer structure and is relatively high in rigidity, the gather 61a has a stable shape and does not collapse and disappear during wearing. On the other hand, in the leakproof cuffs 60, a plurality of relatively small gathers 60a are formed, and the number of gathers 60a per unit area in the leakproof cuffs 60 is more than the number of gathers 61a per unit area in the side extension 61 Will also increase. Therefore, per unit area, the area in contact with the body is larger at the side extension 61 than at the leakproof cuff 60, and the leakproof cuff 60 has lower rigidity than the side extension 61. Stable contact with the body. The dimension of the side extension portion 61 in the lateral direction X is 5 mm, and three to seven gathers (lateral creases) 61a are formed per 50 mm in the longitudinal direction Y. Further, the dimension of the leakproof cuff 60 in the transverse direction X is 5 mm, and at a length dimension of 50 mm in the longitudinal direction Y, 8 to 15 or more gathers (transverse creases) 60a are formed. In addition, while the body fluid such as urine is diffused and absorbed by the hydrophilic layer 50 in the side extension portion 61, the leakproof cuffs 60 prevent the body fluid from moving along the body to the surface facing the skin. The body fluid does not leak to the outside of the diaper 10 even if a gap is formed by the gathers 61a.

Referring to FIG. 6, in the worn state of the diaper 10, the leakage preventing cuffs 60 stand up toward the body 70 of the wearer by the contraction action of the cuff elastic body 64, and the side extension portion 61 is of the leg elastic body 65. It is fitted near the base of the thigh by contraction force. As described above, since the edge of the leg opening 27 of the diaper 10 is in contact with the body in a relatively wide range by the leakproof cuffs 60 and the side extension 61, the side of the body fluid by the leakproof cuffs 60 alone. Side leakage of body fluid can be prevented more effectively than when leakage is prevented.

In order to minimize the thickness dimension of the diaper 10 as much as possible from the viewpoint of preventing the appearance of wearing the diaper on the inner side of the clothes in the daily life when wearing the diaper for adults It is preferable to reduce the thickness and / or width of the sexing core. However, when the thickness dimension or the like of the liquid-absorbent core is reduced, the amount of liquid absorbed by the body fluid may decrease, and the body fluid may not be sufficiently retained. In the diaper 10 according to the present embodiment, it comprises the extended portion 31A of the inner sheet 31 extending outward in the lateral direction X from the side edges 35c and 35d of the liquid absorbent core 35 and the extended portion 36A of the core cover sheet 36. Since the formed hydrophilic layer 50 extends along the side edges 16 c and 16 d of the absorption panel 16 to the side extension 61, the body fluid absorbed in the absorbent core 35 in the hydrophilic layer 50 can be Body fluid that has not been diffused or absorbed into it can be absorbed directly, and body fluid that exceeds the amount absorbed by the absorbent core 35 can be temporarily held.

Referring to FIG. 4, in order to temporarily hold the body fluid in hydrophilic layer 50 in this manner, the dimension in the lateral direction X of hydrophilic layer 50 in the central portion of crotch region 13 (the maximum thickness of hydrophilic layer 50 is Major dimension) W5 is preferably 40 to 60 mm. If the dimension W5 of the hydrophilic layer 50 in the lateral direction X is 40 mm or less, the amount of fluid temporarily retained in the hydrophilic layer 50 may be relatively small, which may cause lateral leakage of the fluid. If the dimension W5 is 60 mm or more, the dimension in the lateral direction of the entire absorbent panel 16 becomes large, and there is a possibility that a gap may be generated between the side extension 61 and the thigh. Further, the narrowest portion of the liquid-absorbent core 35 is located at the center of the crotch region 13 where the body fluid accumulates in the worn state, and its liquid absorption performance is lower than other portions. In the present embodiment, the dimension W5 in the lateral direction X of the hydrophilic layer 50 is 40 to 60% of the dimension W4 in the lateral direction of the narrowest portion of the liquid-absorbent core 35, whereby the fluid absorbency is obtained. Body fluid that has not been absorbed in the core 35 can be retained by the hydrophilic layer 50 to prevent body fluid from leaking across the leakproof cuff 60 sideways.

Further, the side extension part 61 includes a first hydrophobic layer 51 covering the non-skin opposing surface side of the hydrophilic layer 50 and a second hydrophobic layer 52 covering the skin opposing surface side of the hydrophilic layer 50. Since it has, in the hydrophilic layer 50, it can suppress that the bodily fluid diffused and absorbed to the both-sides edge leaks outside. Furthermore, in the side extension portion 61, the first and second

hydrophobic layers

51, 52 are formed by bending the covering sheet 32 so as to cover the entire hydrophilic layer 50, and the lateral direction of the hydrophilic layer 50 is obtained. Since the

hydrophobic layers

51 and 52 are also located outside X, the body fluid does not leak to the outside.

The first hydrophobic layer 51 has a three-layer structure of both sides 42 of the cover sheet 32, the main body 41, and the leakproof film 34, and the second hydrophobic layer 52 is formed of both sides 42 of the cover sheet 32. Because the first and second

hydrophobic layers

51 and 52 are formed by laminating a plurality of hydrophobic sheets, when compared to when they have a single-layer structure, Excellent in leak resistance of body fluid. In addition, the hydrophilic layer 50 has a four-layer structure including the

extended portions

31A and 36A of the inner surface sheet 31 and the core cover sheet 36, and is made of the first and second

hydrophobic layers

51 and 52. Also, it has a multilayer structure with a large number of stacked layers. When the hydrophilic layer 50 has a multilayer structure, it is possible to temporarily hold a larger amount of body fluid than when it has a single layer structure. Moreover, in the natural state (the state where no force is applied to the diaper 10 in any direction), the dimension in the thickness direction Z of the central portion in the lateral direction X where the absorbent core 35 exists in the absorbent structure 30 When the dimensions of the side extension 61 in the thickness direction Z are compared, the rigidity of the side extension 61 is the same or the one in which the dimension of the side extension 61 in the thickness direction Z is larger. Since it can be relatively high, it is easy to maintain the shape that covers the buttocks. In the present embodiment, the dimension in the thickness direction Z of the liquid-absorbent core 35 is 1.5 to 6.0 mm, and the dimension in the thickness direction Z of the side extension 61 is 2.5 to 7.0 mm. The impact on the fit and appearance is small and desirable. In addition. The dimensions in the thickness direction Z of the liquid-absorbent core 35 and the side extension 61 can be measured using a PEACOCK dial thickness gauge J-B manufactured by Ozaki Mfg. Co., Ltd. Those measurements were carried out using a circular measuring terminal with a diameter of 50 mm and adjusted to a pressure of 10 gf / cm ² .

Furthermore, it is preferable that the extensional stress of the expansion-contraction area in which the back lower waist elastic body 23B is arranged is lower than the expansion stress of the expansion-contraction area in which the front lower waist elastic body 20B is arranged. The rear end 19B and the front end 19A of the absorbing panel 16 intersect the lower front and rear waist

elastic bodies

20B and 23B and the size in the lateral direction X is reduced by the contraction force, and the amount of contraction of the rear end 19B is the front end Because the lateral dimension of the rear end 19B becomes smaller than the lateral dimension of the front end 19A, the entire heel area can be covered for the wearer before wearing, And, it can be visually recognized that the body fluid excreted to the rear waist region 12 side can be sufficiently absorbed and held, and a sense of security can be given. In addition, since the lateral dimensions of the front and rear end portions 19A and 19B seen through from the front and

rear waist panels

14 and 15 are different, the front and rear of the diaper 10 can be easily identified. Moreover, in addition to the see-through front end portion 19A being narrower than the rear end portion 19B, the dimension of the absorbent panel 16 in the lateral direction X is relatively small, so that the impression is clear in the front view of the diaper 10 Can be given. Therefore, even when the wearer wears a garment that fits the body, the outer shape of the diaper 10 is not clearly visible from above the garment, and the wearer wears the diaper 10 for the first time You can reduce the resistance to doing things.

<Method of measuring the extension stress in the stretch zone>
It measured by the following method using the tension tester (made by Shimadzu Corp. make) for the extension stress of each expansion-contraction area | region. First, the seam 25 is peeled off in the diaper 10 (M size of a normal adult diaper and the lateral dimension W1 is 600 mm) to separate the front and

rear waist panels

14 and 15, and the front and

rear waist panels

14 and 15 After the front and rear end portions 19A and 19B of the absorbent panel 16 joined to the inner surface with an adhesive are removed from the both

waist panels

14 and 15, front and rear lower waist

elastic bodies

20B and 23B are formed from the front and

rear waist panels

14 and 15, respectively. Each of the arranged stretch zones was cut into a width of 140 mm to obtain each sample. Next, in a state where one end of the sample is held by the movable jig (upper chuck) and the other end is held by the fixed jig (lower chuck), the distance between the chucks is 300 mm, and the movable jig has a speed of 300 mm. Move up by / min, move the distance between chucks up to 425 mm, reverse the movement, move the chucks closer to 300 mm, then move the movement upside down and move the chucks up to 425 mm. The tensile stress (N) at the time of loading was measured.

As a result of this measurement, the extensional stress of the stretchable area in which the rear lower waist elastic body 23B is disposed is about 16 N / m, and the extensional stress of the stretchable area in which the front lower waist elastic body 20B is disposed is about 21 N / m. . Moreover, as a result of the same measurement method, the former is about 3.5 N / m, the latter is about 10 N / m, and the former is about 18 N / m, the latter is about 23 N for the diaper 10 of L size. It was / m.

Referring again to FIG. 2, as described above, the side edges 35 c and 35 d of the liquid absorbent core 35 have a shape that is curved inward in the lateral direction X, and are prevented at the central portion of the crotch region 13. It is most spaced apart from the proximal portion 62 of the leak cuff 60. The liquid-absorbent core 35 is semi-rigid, which is more rigid than the sheet member, and when the liquid-absorbent core 35 is located in the vicinity of the proximal part 62, the proximal part 62 is affected by the rigidity and stands up. Although it may be difficult to do, because the proximal part 62 and the liquid-absorbent core 35 are most separated in the central part of the crotch area 13 where the fluid collects most, the standing up of the leakproof cuffs 60 is inhibited. Can prevent the side leakage of body fluid.

Further, referring to FIG. 5, in the present embodiment, the outer joint area 46 located in the side extension 61 and the inner joint area 47 forming the proximal part 62 of the leak-barrier cuff 60 mutually differ in the lateral direction X It is separated. Thus, by separating the outer joint area 46 and the proximal part 62, the side extension 61 and the leak-barrier cuff 60 are independent of each other without being affected by the extension and contraction of each other. You can stand up. However, in order to simplify the manufacturing process of the diaper 10, the outer joint area 46 and the inner joint area 47 are continuous, as long as the side extension 61 and the leak-barrier cuffs 60 stand independently of each other. It may be applied to the covering sheet 32.

First Modified Example
FIG. 7 is an enlarged view similar to FIG. 5 in an example of a modified example of the diaper 10. The basic configuration aspect of the diaper 10 of this modification is the same as that of this embodiment, and only differences will be described below.

In this modification, both side edges of the liquid absorbent structure 30, that is, a part of the hydrophilic layer 50 are bent together with the both sides 42 of the cover sheet 32, and the inner sheet 31 is opposed to the other through the bonding area 81. It is fixed. In this modification, since the 13-layer structure is provided in the most stacked portion 82 of the side extension portions 61 having the largest number of stacked layers, both side edges of the absorbing panel 16 are compared with those of the present embodiment. It is thick and stiffer.

Second Modified Example
FIG. 8 is an enlarged view similar to FIG. 5 in an example of a modified example of the diaper 10. The basic configuration aspect of the diaper 10 of this modification is the same as that of this embodiment, and only differences will be described below.

In this modification, the outer edge 32 b of the covering sheet 32 overlaps all the leg elastics 65 in a plan view, and the number of the leg elastics 65 is increased as compared with the above embodiment. The leg elastic area 65a formed by the above and the cuff elastic area 64a formed by the cuff elastic body 64 overlap in plan view, and the leakage preventing cuff 60 and the side extension portion 61 overlap in plan view.

The above configuration and the number of gathers 61a formed per unit area of the side extension portion 61 is smaller than the number of gathers 60a formed per unit area of the leakproof cuff 60, the end in the longitudinal direction Y A space can be formed between the side extension 61 and the leak-barrier cuff 60 via the hydrophilic layer 50 in the portion adjacent to the inward of the joint portion 48, and the air permeability of the diaper 10 is improved. can do.

In the present specification, the leg elastic body 65 is described as being located between the leakproof film 34 and the outer edge portion 42A located on the skin facing surface side of the folded cover sheet 32, but the leg elastic body is described. 65 may be located between the leakproof film 34 and the outer edge 42A located on the non-skin facing side of the folded cover sheet 32, or the folded inner sheet 31 and the folded cover sheet 32. It may be located between the skin facing surface side of.

In this specification, as an example of the disposable wearing article, a diaper 10 composed of three panel members: front and

rear waist panels

14 and 15 forming front and

rear waist regions

11 and 12 and absorption panel 16 forming crotch region 13. However, the front and

rear waist panels

14 and 15 may not be separate but may be formed from a single annular waist panel extending continuously around the waist.

In addition to the materials described in the specification, various known materials generally used in this type of article can be used without limitation for each component constituting the disposable wearing article of the present invention. Also, in the specification and claims, terms such as "first" and "second" are used merely to distinguish similar elements, locations, and the like.

10 Disposable diapers (disposable items)
11 front waist area 12 rear waist area 13 crotch area 14 front waist panel 15 rear waist panel 16 absorption panel 19A front end 19B rear end 20B front lower waist elastic body (front waist elastic body)
23B back lower waist elastic (rear waist elastic)
31 inner surface sheet 31A inner sheet extension 35 absorbent core 36 core cover sheet 36A core cover sheet extension 43 first bending line 44 second bending line 50 hydrophilic layer (liquid diffusive layer)
51 First hydrophobic layer (hydrophobic layer)
52 Second hydrophobic layer (hydrophobic layer)
60 leak-proofing cuffs 61 side extension part 62 proximal part 63 distal part 64 cuff elastic body 65 leg elastic body W6 lateral elastic dimension of cuff elastic body W7 lateral elastic dimension of leg elastic body X lateral direction Y longitudinal Direction Z thickness direction

Claims

The skin facing surface and the non-skin facing surface, the front waist panel forming the front waist region, the rear waist panel forming the rear waist region, and the front and rear waist panels, having a longitudinal direction, a lateral direction, and a thickness direction A disposable wearable article comprising: an absorbent panel positioned between and forming a crotch area; a liquid absorbent core; and a pair of leakproof cuffs extending in the longitudinal direction on the skin facing surface side of the absorbent panel;
The leakproof cuff has the longitudinally extending proximal portion and the distal portion, and the longitudinally expandable elastic cuff is disposed.
The longitudinally extending side extending portion having a leg elastic body is located outside the lateral direction of the proximal portion,
The number of sheets forming the side extension portion is larger than the number of sheets forming the leakproof cuff.
The cuff elastic body that can extend and contract in the longitudinal direction is disposed at the side extension portion,
The extension ratio of the leg elastics is smaller than the extension ratio of the cuff elastics,
The worn article wherein the lateral separation dimension between the leg elastics is greater than the lateral separation dimension of the cuff elastics.
The wearing article according to claim 1, wherein the number of gathers formed per unit area of the side extension portion is smaller than the number of gathers formed per unit area of the leakproof cuff.
The absorbent panel has front and rear end portions located on the front and rear waist panels, and the front and rear waist panels each have a plurality of front and rear waist elastic bodies extending in the lateral direction, and the front waist elastic body The extensional stress of the elastic body overlapping each other in plan view with the front end portion of the absorbent panel is greater than the extensional stress of the elastic body overlapping each other in plan view with the rear end portion of the absorption panel of the rear waist elastic body. The wearing article according to claim 1 or 2, which is high.
The wearing article according to any one of claims 1 to 3, wherein the side extension part has a liquid diffusive layer and a hydrophobic layer covering the liquid diffusive layer in the thickness direction.
It further has a liquid-permeable inner sheet covering the skin-facing surface side of the liquid-absorbent core, and the liquid diffusive layer further extends outward in the lateral direction from both side edges of the liquid-absorbent core The wearing article according to claim 4, further comprising an extension portion of the inner sheet.
The liquid crystal display further includes a core cover sheet for the liquid absorbent core, and the liquid diffusive layer extends from the both side edges of the liquid absorbent core further outward in the lateral direction. The wearing article according to claim 4 having a.
The wearing article according to claim 5, wherein the extension portion of the inner surface sheet is bent toward the non-skin opposing surface side of the liquid-absorbent core along the longitudinally extending bending line.