JP5833270B1 - Disposable wearing items - Google Patents

Abstract

Disclosed is a disposable wearing article that has a relatively slim liquid-absorbent core and that can temporarily diffuse and retain body fluids in excess of the liquid retention amount of the liquid-absorbent core. A leak-proof cuff 60 has a base end portion 62 extending in the vertical direction Y and a free portion 63 that can be expanded and contracted in the vertical direction Y, and the base end portion 62 of the leak-proof cuff 60 in the horizontal direction X. A side extension 61 that extends in the vertical direction Y is located outside. The side extending portion 61 includes a hydrophilic layer 50 and hydrophobic layers 51 and 52 that cover the hydrophilic layer 50 in the thickness direction Z. [Selection] Figure 5

Description

  The present invention relates to a disposable wearing article.

  Patent Document 1 discloses a front waist panel that forms a front waist region, a rear waist panel that forms a rear waist region, an absorbent panel that is positioned between the front and rear waist panels and forms a crotch region, and a liquid absorbent core And a pair of leak-proof cuffs that extend in the longitudinal direction on the skin facing surface side of the absorbent panel are disclosed.

JP 2011-50501 A (P2011-50501)

  In the wearing article disclosed in Patent Literature 1, the leakage of excrement can be effectively prevented by the pair of leak-proof cuffs standing toward the wearer's body in the wearing state. However, for example, when the thickness dimension and / or the lateral dimension of the liquid absorbent core is reduced in order to make the appearance more appropriate as underwear as a wearing article for light incontinence, the amount of absorbed body fluid is relatively low. There is a risk that the body fluid that is excreted will leak out without being absorbed.

  Accordingly, an object of the present invention is an improvement of the prior art, which has a relatively slim liquid-absorbent core and temporarily diffuses and retains body fluids that are in excess of the liquid-holding amount of the liquid-absorbent core. The present invention provides a disposable wearing article that can be used.

  In order to achieve the above object, the present invention has a longitudinal direction, a lateral direction, a thickness direction, a skin facing surface and a non-skin facing surface, a front waist panel that forms a front waist region, and a back waist. A rear waist panel that forms a region, an absorbent panel that is positioned between the front and rear waist panels to form a crotch region, a liquid absorbent core, and a pair that extends in the longitudinal direction on the skin facing surface side of the absorbent panel The present invention relates to a disposable wearing article including a leakproof cuff.

In the disposable wearing article according to the present invention, the leak-proof cuff has a base end portion extending in the vertical direction and a free portion that can be expanded and contracted in the vertical direction, and the base end portion of the leak-proof cuff A laterally extending portion extending in the longitudinal direction is located outside in the lateral direction, and the laterally extending portion has a hydrophilic layer and a hydrophobic layer that covers the hydrophilic layer in the thickness direction. The hydrophilic layer extends to both side edges of the absorbent panel, and the hydrophobic layer includes a first hydrophobic layer that covers the non-skin facing surface side of the hydrophilic layer, and the hydrophilic layer. A plurality of leg elastic bodies extending in the longitudinal direction are arranged on the first hydrophobic layer .

  A hydrophilic inner surface sheet is disposed on the skin-facing surface side of the liquid absorbent core, and the hydrophilic layer extends further outward in the lateral direction from both side edges of the liquid absorbent core. Formed from the extended portion of the inner sheet. In such a wearing article, by utilizing the liquid diffusibility and the liquid retaining property of the extended portion of the inner layer sheet, it is possible to temporarily retain a body fluid that is greater than the liquid retaining amount of the liquid absorbent core.

  It further has a liquid diffusible core wrap sheet encapsulating the liquid absorbent core, and the hydrophilic layer further extends in the lateral direction from the extended portion of the inner surface sheet and both side edges of the liquid absorbent core. And an extended portion of the core wrap sheet extending outward. In such a wearing article, by utilizing the liquid diffusibility and the liquid retaining property of the extended portion of the core wrap sheet, it is possible to temporarily retain the body fluid above the liquid retaining amount of the liquid absorbent core.

  The extending portion of the inner surface sheet is bent toward the non-skin facing surface side of the liquid absorbing structure along a bending line extending in the vertical direction. In such a wearing article, when the inner sheet is folded, the amount of liquid retained in the hydrophilic layer is increased, and more body fluid can be temporarily retained.

  The first hydrophobic layer is formed of a hydrophobic coating sheet that forms an outer surface of the absorbent panel and a liquid-impervious leak-proof film that covers a bottom surface of the absorbent core, and The hydrophobic layer is formed from both side portions of the covering sheet that are bent and fixed to the skin facing surface side of the hydrophilic layer along the folding line extending in the longitudinal direction. In such a wearing article, the first and second hydrophobic layers have a multilayer structure formed from a plurality of sheets, so that the leakage of body fluid is improved as compared with the case of having a single layer structure.

A plurality of cuff elastic bodies extending in the vertical direction are disposed in the free portion of the leak-proof cuff, and the lateral separation dimension between the leg elastic bodies is the horizontal distance between the cuff elastic bodies. It is larger than the direction separation dimension. In such a worn article, a relatively large gather is formed in the side extension portion, and a gap serving as an air flow path is formed between the body and the body, and the diaper inside the diaper can be prevented.

  The number of sheets that form the hydrophilic layer is larger than the number of sheets that form the first hydrophobic layer and the number of sheets that form the second hydrophobic layer. In such a wearing article, the number of laminated sheets forming the hydrophilic layer is relatively large, and more body fluid can be temporarily retained.

  The said absorption panel has the front-and-rear end part located in the said front-and-rear waist panel, The said front-and-rear waist panel each has several front-and-back waist elastic bodies extended in the said horizontal direction, The stretching stress of the stretchable region in which the elastic body that overlaps the front end portion of the absorbent panel in plan view is elastic to overlap the rear end portion of the absorber of the rear waist elastic body in plan view. It is higher than the stretching stress of the stretch zone where the body is placed. In such a wearing article, the lateral dimension of the rear end portion of the absorbent panel is larger than the lateral dimension of the front end portion due to the contraction action of the front and rear waist elastic bodies. It is possible to give the impression that the entire buttock is covered on the rear waist region side and the lateral leakage of excrement can be prevented, and the overall lateral dimension of the front end is reduced, so that the width is relatively narrow. Combined with the outer shape of the absorbent panel, a clean impression can be given in front view of the worn article.

  The liquid-absorbent core has both side edges that protrude inward in the lateral direction, and the leak-proof cuff is spaced apart from the liquid-absorbent core in the lateral direction at the center of the crotch region. In such a wearing article, the leak-proof cuff can stand independently without being affected by the semi-rigid liquid-absorbent core.

  According to the disposable wearing article according to the present invention, since the side extension of the absorbent panel has a hydrophilic layer and a hydrophobic layer that covers it in the thickness direction, the absorbent panel is a liquid-absorbent core. It is possible to temporarily hold a body fluid above the amount of liquid retained.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view of the disposable diaper shown as an example of the disposable wearing article which concerns on this indication. The partially broken expansion | deployment top view which looked at 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 to the skin opposing surface side of a coating sheet, (c) The figure which shows the arrangement | positioning aspect of each joining area | region of the both sides of a coating sheet. Sectional drawing which follows the IV-IV line | wire of FIG. FIG. 5 is a partially enlarged view of a region surrounded by a V line in FIG. 4. The enlarged view of the leg opening edge part in a wearing condition. The figure similar to FIG. 5 in a modification.

  The following embodiment relates to the disposable diaper 10 according to the first embodiment shown in FIGS. 1 to 7 which is an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. 2 and 3, each elastic body to be described later is naturally gathered on the member to which each elastic body is attached due to the contracting force in the lateral direction X and the longitudinal direction Y against the contracting force. It is in a state of being stretched to such an extent that it appears to be substantially lost visually.

  1 to 3, a disposable diaper 10 which is an example of a disposable wearing article according to the present invention includes a longitudinal direction Y and a transverse direction X intersecting the longitudinal direction Y, a thickness direction Z, a skin facing surface and the opposite side. A non-skin-facing surface, a longitudinal center line P that bisects the length dimension in the lateral direction X, and a transverse center line Q that bisects the length dimension in 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 that forms the front waist region 11, the rear waist panel 15 that forms the rear waist region 12, and the front and rear waist panels 14 and 15, thereby forming the crotch region 13. And an absorption panel 16. The absorption panel 16 has a front end 19A located on the skin facing surface side of the front waist region 11, a rear end 19B located on the skin facing surface of the rear waist region 12, and an intermediate located between the front and rear end portions 19A and 19B. Part 19C. In the present embodiment, the front and rear end portions 19A and 19B of the absorbent panel 16 are located 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 11 and 12, respectively. You may fix the absorption panel 16 to the outer surface of the front-and-back waist panels 14 and 15 so that it may be located in a non-skin opposing surface.

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

  The front waist panel 14 includes an inner end edge (inner end edge of the front waist region) 14a that forms a part of the front leg opening, and an outer end edge (outer end edge of the front waist region) 14b that forms the front waist opening. , Having a horizontally long rectangular shape defined by both side edges 14c and 14d (both side edges of the front waist region) extending in the longitudinal direction Y between the inner and outer end edges 14a and 14b. In addition, the front waist panel 14 includes a liquid-impervious inner layer sheet 17 positioned on the skin facing surface side, a liquid-impervious outer layer sheet 18 positioned on the non-skin facing surface side, and the inner and outer layer sheets 17, 18. And a plurality of strand-like or string-like front waist elastic bodies 20 arranged so as to be contractible in an extended state in the lateral direction X.

  The rear waist panel 15 includes an inner end edge (inner end edge of the rear waist region) 15a that forms a part of the rear leg opening, and an outer end edge (outer end edge of the rear waist region) 15b that forms the 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, 22. And a plurality of strand-like or string-like rear waist elastic bodies 23 arranged so as to be contractible in an extended state in the transverse direction X.

  The front waist elastic body 20 includes a plurality of front upper waist elastic bodies 20A extending in the lateral direction X along the outer end edge 14b, and a front lower waist positioned between the front upper waist elastic body 20A and the inner end edge 14a. And an elastic body 20B. The rear waist elastic body 23 includes a plurality of rear upper waist elastic bodies 23A extending in the lateral direction X along the waist opening edge, and a rear lower waist elasticity located between the rear upper waist elastic body 23A and the inner end edge 15a. And a body 23B. The front lower waist elastic body 20B is positioned so as to overlap with each other in a plan view of the front end portion 19A of the absorbent panel 16 and the diaper 10, and the rear lower waist elastic body 23B is mutually in a plan view with the rear end portion 19B of the absorption panel 16. It is located so as 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 impermeable and preferably air permeable, have a mass of about 10 to 40 g / m ² and a fiber density of about 0.03. Various known fiber nonwoven fabrics, such as a spunbond fiber nonwoven fabric of ~ 0.1 g / cm ³ , an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, and an air-through fiber nonwoven fabric, can be used.

  In the front and rear waist elastic bodies 20 and 23, as the front and rear upper waist elastic bodies 20A and 23A, for example, the fineness is about 600 to 1200 dtex, and the front and rear waist elastic bodies 20 and 23 can be contracted in an extended state about 2.5 to 3.5 times. An arranged string-like or strand-like elastic material can be used. Further, as the front and lower waist elastic bodies 20B and 23B, for example, a string shape or a strand having a fineness of about 400 to 800 dtex and arranged to be contractable in a state of being stretched about 1.5 to 3.0 times An elastic material can be used. Various conditions such as the fineness of the front and rear waist elastic bodies 20 and 23, the expansion ratio, and the separation dimension (pitch) between the elastic bodies can be appropriately changed as necessary. In order to be worn stably by the body, the elastic body has an extension stress in the stretchable region due to the front and back waist elastic bodies 20A and 23A higher than the stretch stress in the stretchable region due to the front and back waist elastic bodies 20B and 23B. It is preferable to set conditions. Moreover, as long as a required elastic force can be applied to the front and rear waist regions 11 and 12, instead of or along with the front and rear waist elastic bodies 20 and 23, the elastic elastic sheet is attached to the inner surface side of the front and rear waist regions 11 and 12, or You may arrange | position to an outer surface side. By arranging the front and rear waist elastic bodies 20, 23 on the entire outer surface of the diaper 10, a plurality of gathers are formed on the outer surface and 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. Moreover, the dimension W2 of the horizontal direction X of the absorption panel 16 is about 150-220 mm. Therefore, the dimension W2 in the lateral direction X of the absorbent panel 16 is about 27 to 36% of the dimension W1 in the lateral direction X of the diaper 10, and is absorbed in comparison with a general diaper (especially for adults). It can be said that the panel 16 is narrow.

  The absorbent panel 16 has a vertical rectangular shape defined by front and rear end edges 16a and 16b and both side edges 16c and 16d, and the front and rear end portions 19A and 19B are hot-melted on the skin facing surfaces of the front and rear waist panels 14 and 15, respectively. They are joined to each other via a front and rear joining area (not shown) formed by applying an adhesive. As the application pattern of the hot melt adhesive in the front-rear joining region, for example, various known shapes such as an Ω shape, a spiral shape, and a wave shape can be adopted in addition to a plurality of line shapes extending in the longitudinal direction Y.

  Referring to FIG. 2 and FIG. 3, the absorbent panel 16 includes a liquid absorbing structure 30 including a hydrophilic / liquid permeable inner surface sheet (body side liner) 31 and an absorbent body 33 that are located on the skin facing surface side. A hydrophobic coating sheet 32 positioned on the non-skin facing surface side of the liquid absorbing structure 30, and a hydrophobic or hydrophobic sheet having a size covering at least the bottom surface on the non-skin facing surface side of the liquid absorbing structure 30. And a liquid-impervious leak-proof film 34. The absorbent body 33 includes a liquid absorbent core 35 and a core wrap sheet 36 that covers the entire liquid absorbent core 35.

  The liquid-absorbent core 35 has a semi-rigid panel shape shaped into a required shape, and extends toward the longitudinal center line P between the front and rear end edges extending in the lateral direction X and the front and rear end edges (lateral direction X And both side edges 35c and 35d extending in a convex manner. The liquid absorbent core 35 is formed of a mixture of fluffed wood pulp and super absorbent polymer particles (SAP). When the wearing article 10 is used as a diaper for adults and light incontinence, it is preferable that the thickness of the absorbent core 35 is relatively small. For example, the mass of SAP is changed to the mass of fluff wood pulp. On the other hand, by making it relatively small, the thickness dimension may be reduced while maintaining a required water absorption amount, or the liquid-absorbing core 35 may be formed only from SAP.

The inner surface sheet 31 and the core wrap sheet 36 are formed from a sheet material having hydrophilicity and liquid diffusibility, and for example, a spunbond fiber nonwoven fabric having a mass of about 15 to 25 g / m ² and subjected to a hydrophilic treatment. , SMS fiber nonwoven fabric and the like. The core wrap sheet 36 can be formed from the same type of sheet material as the inner sheet 31, but is preferably formed from tissue paper. Moreover, the thickness dimension should just be a thickness dimension which implement | achieves the intensity | strength which is small compared with that of the inner surface sheet 31, and can hold the liquid-absorbing core 35 in a required shape. The covering sheet 32 is formed from a hydrophobic or substantially liquid-impervious sheet material, and is formed from, for example, an SMS fiber nonwoven fabric or a spunbond nonwoven fabric having a mass of about 15 to 30 g / m ² . The leak-proof film 34 is preferably formed of a hydrophobic sheet material having air permeability, for example, an air-permeable plastic film having a mass of about 10 to 25 g / m ² .

  Referring to FIGS. 4 and 5, in the liquid absorbing structure 30, the inner sheet 31 extends further outward in the lateral direction X from both side edges 35 c and 35 d of the liquid absorbing core 35. Specifically, the inner surface sheet 31 that covers the skin facing surface side of the liquid-absorbent core 35 is along a bent line (not shown) extending in the longitudinal direction Y along both side edges 16c and 16d of the absorbent panel 16. The outer edge 31b is located on the non-skin facing surface side of the liquid absorbent core 35. The core wrap sheet 36 that encloses the liquid absorbent core 35 has an outer shape that is slightly larger than the external dimensions of the liquid absorbent core 35. The inner surface sheet 31 and the core wrap sheet 36 have extension portions 31A and 36A extending from both side edges 35c and 35d of the liquid-absorbent core 35 to the outside in the lateral direction X, respectively, and the extension portions 31A and 36A A hydrophilic layer (liquid diffusible layer) 50 is formed outside the liquid-absorbent core 35 in the lateral direction X.

  The hydrophilic layer 50 has a four-layer structure because it is formed from the extended portions 31 </ b> A and 36 </ b> A of the inner sheet 31 and the core wrap sheet 36. However, as long as it has the required liquid retention performance, the extended portion 31A of the inner surface sheet 31 and the extended portion 36A of the core wrap sheet 36 may have a single-layer structure instead of a two-layer structure, and are hydrophilic. The layer 50 may be formed only from the extending portion 31 </ b> A of the inner surface sheet 31. Further, since both side edges 35c and 35d of the liquid-absorbent core 35 are concavely curved, the hydrophilic layer 50 has the largest dimension W5 in the lateral direction X in the central portion of the crotch region 13, and the front and rear waists. In the areas 13 and 14, the dimension W5 is the smallest.

  FIG. 3A is a view showing a bending mode of the covering sheet 32, FIG. 3B is a view showing a state in which the liquid absorbing structure 30 is arranged on the covering sheet 32, and FIG. FIG. 4 is a view showing an arrangement mode of joining regions 46 to 48 on 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 both side edges of the absorbent panel 16 have the laminated structure shown in FIG. May be. In FIG. 4, for convenience of explanation, both side portions 42 of the covering sheet 32 lie down on the one side edge 16 c side of the absorbent panel 16, and both side portions 42 of the covering sheet 32 on the other side edge 16 d side of the absorbent panel 16. Indicates a standing state.

  Referring to FIG. 3A, the covering sheet 32 is more lateral than the main part 41 in which the leak-proof film 34 is disposed and the folding line 43 extending in the vertical direction Y along both side edges of the leak-proof film 34. And both side portions 42 located outside X. Both side portions 42 are folded and overlapped along the folding line 43 toward the longitudinal center line P. In such a bent state, a plurality of string-like or strand-like cuff elastic bodies 64 extending in the vertical direction along the bent line 43 can be contracted in an extended state between the side portions 42 and the main portion 41. Has been placed. In addition, a plurality of string-like or strand-like leg elastic bodies (gasket cuff elastic bodies) 65 extending in the vertical direction between both side portions 42 and the leak-proof film 34 are provided on the outer edge side of the covering sheet 32. It is attached so that it can contract in the stretched state.

  Referring to FIG. 3B, the liquid absorbing structure 30 is disposed on the skin facing surface side in the bent state of the covering sheet 32 of FIG. In a state in which the liquid absorbing structure 30 is disposed on the covering sheet 32, the longitudinal center line is further extended along the bent line 44 extending in the longitudinal direction Y along the both side edges of the liquid absorbing structure 30 at both side portions 42 of the covering sheet 32. Bend to P side.

  Referring to FIG. 3C and FIGS. 4 and 5, in a state of being folded along the folding line 44, the portion of the both side portions 42 folded on the skin facing surface side of the hydrophilic layer 50 is An outer joint area 46 extending in the longitudinal direction Y along both side edges 16c and 16d of the absorbent panel 16, an inner joint area 47 located inside the lateral direction X of the outer joint area 46, and inner joints in the front and rear waist areas 11 and 12 It fixes via the edge part junction area 48 located in the inner side of the horizontal direction X of the area | region 47 further. In addition, the outer edge located on the non-skin facing surface side of the hydrophilic layer 50 is joined to the non-skin facing surface side of the hydrophilic layer 50 via a joining region 49 facing the outer joining region 46 in the thickness direction. . Although not shown, unless otherwise specified in the present specification, the sheets stacked in the thickness direction Z are fixed by an adhesive applied to at least one of the surfaces of the sheets facing each other. Has been.

  Referring to FIGS. 4 and 5, the absorption panel 16 has such a configuration, and thus a pair of leak-proof cuffs 60 extending in the vertical direction Y and a pair of sides located outside the lateral direction X of the leak-proof cuff 60. It further has an extension part (gasket cuff) 61. The leak-proof cuff 60 is fixed to the inner surface sheet 31 via the inner joint region 47 and the both-end fixing portion fixed to the inner surface sheet 31 via the end joint region 48 of the both side portions 42 of the covering sheet 32. A base end portion (proximal portion) 62 extending in the longitudinal direction Y and a free portion (distal portion) extending in the longitudinal direction Y between the both end fixing portions 61 and extending in the longitudinal direction Y in parallel with the base end portion 62. 63. A cuff elastic body 64 is disposed in the free portion 63 so as to be contracted in an extended state. When the cuff elastic body 64 contracts in the wearing state, the edge portion is separated from the inner surface sheet 31 toward the wearer's body, and fits the wearer's thigh to prevent leakage of excrement.

  In the present embodiment, the leak-proof cuff 60 and the side extension 61 are formed from the cover sheet 32, but the leak-proof cuff 60 may be formed from a sheet material separate from the cover sheet 32. In such a case, the leak-proof cuff 60 mainly prevents leakage of excrement, and therefore does not necessarily need to be formed from a liquid-impermeable sheet. Further, an elastic stretchable sheet may be used as the free part 63 of the leak-proof cuff 60 or the cuff elastic body 64.

  Referring to FIGS. 4 and 5, the side extension 61 of the absorbent panel 16 includes a hydrophilic layer 50 composed of an extension part 31 </ b> A of the inner surface sheet 31 and an extension part 36 </ b> A of the core wrap sheet 36, Hydrophobic layers 51 and 52 covering the conductive layer 50 in the thickness direction Z. The hydrophobic layers 51 and 52 are a first hydrophobic layer (lower layer) 51 that covers the non-skin facing surface side of the hydrophilic layer 50 and a second hydrophobic layer that covers the skin facing edge side of the hydrophilic layer 50. (Upper layer) 52. The first hydrophobic layer 51 has a three-layer structure including a main body portion 41 of the covering sheet 32, an outer edge portion 42 </ b> A, and a leak-proof film 34, and the second hydrophobic layer 52 is formed on both sides of the covering sheet 32. It has a two-layer structure composed of part 42. Between the side edge part of the leak-proof film 34 which forms the 1st hydrophobic layer 51, and the outer edge part 42A of the coating sheet 32, the multiple leg | leg elastic body 65 is attached so that contraction is possible in the expansion | extension state. . The side extension 61 of the absorbent panel 16 has elasticity in at least the longitudinal direction Y due to the contracting action of the leg elastic body 65 located in the first hydrophobic layer 51.

  Referring to FIG. 6, when the diaper 10 is worn, the leak-proof cuff 60 stands up toward the wearer's body 70 due to the contraction action of the cuff elastic body 64 and abuts against the buttocks, while the side extension. The part 61 is fitted near the base of the thigh by the contraction force of the leg elastic body 65. In this way, the leg opening edge of the diaper 10 is brought into contact with the body in a relatively wide range by the leak-proof cuff 60 and the side extension portion 61, so that the side leakage of excrement is caused only by the leak-proof cuff 60. As compared with the case of preventing the excrement, the side leakage of excrement can be prevented more effectively.

  In the case of a diaper for adults, in order to minimize the thickness of the diaper 10 from the viewpoint of preventing the appearance of wearing a diaper on the inside of the clothes in daily life, It is preferable to reduce the thickness dimension and / or the width dimension of the conductive core. However, when the thickness dimension of the liquid-absorbent core is reduced, the amount of the body fluid absorbed may decrease, and the body fluid may not be sufficiently retained. The diaper 10 according to the present embodiment includes an extended portion 31 </ b> A of the inner surface sheet 31 and an extended portion 36 </ b> A of the core wrap sheet 36 that extend outward in the lateral direction X from both side edges 35 c and 35 d of the liquid absorbent core 35. Since the hydrophilic layer 50 thus formed extends to the side extending portions 61 along the side edges 16c and 16d of the absorbent panel 16, the body fluid absorbed in the liquid absorbent core 35 in the hydrophilic layer 50 is absorbed. The body fluid that has diffused or has not been absorbed into it can be directly absorbed, and the body fluid that exceeds the liquid absorption amount of the liquid absorbent core 35 can be temporarily retained.

  Referring to FIG. 4, in order to temporarily retain the body fluid in the hydrophilic layer 50 as described above, the dimension in the lateral direction X of the hydrophilic layer 50 in the central portion of the crotch region 13 (the maximum of the hydrophilic layer 50). Large dimension) W5 is preferably about 40-60 mm. When the dimension W5 in the lateral direction X of the hydrophilic layer 50 is 40 mm or less, the amount of bodily fluid temporarily retained in the hydrophilic layer 50 is relatively small, and there is a risk of causing side leakage of the bodily fluid. When the dimension W5 in the direction X is 60 mm or more, the lateral dimension of the entire absorption panel 16 is increased, and there is a possibility that a gap is generated between the side extension part 61 and the thigh. Moreover, the narrowest part of the liquid-absorbent core 35 is located in the central part of the crotch region 13 where body fluid accumulates in a worn state, and the liquid-absorbing performance is lower than other parts. In the present embodiment, the dimension W5 in the lateral direction X of the hydrophilic layer 50 is about 40 to 60% of the dimension W4 in the lateral direction of the narrowest portion of the liquid-absorbent core 35. The body fluid that has not been absorbed by the conductive core 35 is retained by the hydrophilic layer 50, and the body fluid can be prevented from leaking beyond the leak-proof cuff 60.

  Moreover, the side extension part 61 has the 1st hydrophobic layer 51 which coat | covers the non-skin opposing surface side of the hydrophilic layer 50, and the 2nd hydrophobic layer 52 which coat | covers the skin opposing surface side of the hydrophilic layer 50. Therefore, it is possible to suppress body fluid that has diffused and absorbed to both side edges of the hydrophilic layer 50 from leaking to the outside. Further, 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 Since the hydrophobic layers 51 and 52 are located outside X, body fluid does not leak to the outside.

  The first hydrophobic layer 51 has a three-layer structure of both side portions 42 of the covering sheet 32, the main portion 41 and the leak-proof film 34, and the second hydrophobic layer 52 is formed from both side portions 42 of the covering sheet 32. Since the first and second hydrophobic layers 51 and 52 are formed by laminating a plurality of hydrophobic sheets, the first and second hydrophobic layers 51 and 52 are compared with the case where they have a single layer structure. Excellent body fluid leakage. Further, the hydrophilic layer 50 has a four-layer structure composed of the extended portions 31A and 36A of the inner surface sheet 31 and the core wrap sheet 36. From the first and second hydrophobic layers 51 and 52, Has a multi-layer structure in which the number of stacked layers is large. Since the hydrophilic layer 50 has a multilayer structure, a larger amount of body fluid can be temporarily retained as compared with the case where it has a single layer structure.

  Since the hydrophilic layer 50 and the first and second hydrophobic layers 51 and 52 have a multilayer structure, the side extension portion 61 has a number of stacked layers that is three times or more that of the sheet forming the leak-proof cuff 60, Specifically, nine layers are laminated in the thickness direction Z. Since the side extension 61 has a multilayer structure formed by folding sheets in this way, it has a relatively high rigidity. Therefore, when the side extension part 61 is formed of a single layer or two or three layers, the side extension part 61 may bend during wearing on the rear waist area 12 side of the crotch area 13 and the buttock may be exposed. However, since the side extension part 61 has a nine-layer structure, it can stably abut on the body and cover the buttocks. Moreover, in a normal diaper, the part covering the flap-shaped buttocks is in a state where it bites into the wearer's body in the wearing state. This step-like line is visible from the top of the garment, and may cause a feeling of resistance against wearing of diapers, particularly for female wearers. In the diaper 10 according to the present embodiment, the side extension portion 61 has a relatively high rigidity, so that in a worn state, a portion that covers the buttocks becomes difficult to bite into the body, and even when wearing clothing that fits the body The step-like line between the diaper 10 and the body is not visually recognized from above the clothing, and the resistance to wearing can be reduced even for the wearer who wears the diaper 10 for the first time.

  Further, since the lateral dimension X (pitch) between the leg elastic bodies 65 is larger than the lateral dimension X (pitch) between the cuff elastic bodies 64, the side extension portion 61 has a leak-proofing property. A plurality of gathers larger than the gathers formed in the free part 63 of the cuff 60 are formed. Since a relatively large number of gathers are formed in the side extension 61, a plurality of gaps serving as air flow paths are formed between the thigh and the side extension 61, and the inside of the diaper 10 Can effectively prevent stuffiness. Moreover, since the side extension part 61 has a multilayer structure and is comparatively high in rigidity, such a gather has a stable shape and does not collapse and disappear during wearing. On the other hand, in the leak-proof cuff 60, a plurality of relatively small gathers are formed, and the number of gathers per unit area is larger than that of the side extension portion 61. Therefore, the contact area with respect to the body is larger in the leak-proof cuff 60 than in the site extension part 61, and even if the rigidity is lower than that in the side extension part 61, the leak-proof cuff 60 is stably in contact with the body. In the side extension portion 61, body fluid is diffused and absorbed by the hydrophilic layer 50, while the body fluid is prevented from moving to the skin facing surface by the leak-proof cuff 60. Thus, even if a gap due to gathers is formed, body fluid does not leak to the outside.

  Further, the expansion ratio of the leg elastic body 65 is preferably lower than the expansion ratio of the cuff elastic body 64. Since the expansion ratio of the leg elastic body 65 is relatively low, the side extension portion 61 does not stand up toward the body together with the leak-proof cuff 60, but protrudes outward in the lateral direction X. The inner surface of the thigh can be brought into contact with the surface.

  Furthermore, it is preferable that the extension stress of the stretchable region where the rear lower waist elastic body 23B is disposed is lower than the stretch stress of the stretchable region where the front lower waist elastic body 20B is disposed. The rear end portion 19B and the front end portion 19A of the absorbent panel 16 intersect with the front and rear lower waist elastic bodies 20B and 23B, and the size of the rear end portion 19B is reduced by the contraction force. Since the lateral dimension of the rear end portion 19B is smaller than the lateral dimension of the front end portion 19A, it is possible to cover the entire buttocks against the wearer before wearing. And it can be made to recognize visually that the excretion excreted by the back waist region 12 side can fully be absorbed and held, and a sense of security can be given. Moreover, since the lateral dimensions of the front and rear end portions 19A and 19B seen through the front and rear waist panels 14 and 15 are different, the front and rear of the diaper 10 can be easily identified. Further, since the front end portion 19A seen through is narrower than the rear end portion 19B and the dimension in the lateral direction X of the absorbent panel 16 is relatively small, the diaper 10 has a clean impression when viewed from the front. 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 seen from above the garment, and the wearer wears the diaper 10 for the first time. It is possible to reduce a sense of resistance to doing.

<Measurement method of stretching stress in stretch zone>
The elongation stress in each stretch region was measured by the following method using a tensile tester (manufactured by Shimadzu Corporation). First, in the diaper 10 (M size of a normal adult diaper and having a lateral dimension W1 of about 600 mm), the seam 25 is peeled off to separate the front and rear waist panels 14 and 15, and the front and rear waist panels 14 and 15 are separated. After removing the front and rear end portions 16A and 16B of the absorbent panel 16 joined to the inner surface of the front and rear waist panels 14 and 15 from the front and rear waist panels 14 and 15, the front and lower waist elastic bodies 20B and 23B, respectively. Each stretched area where was placed was cut out to give 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 speed of the movable jig is 300 mm. / Min, move the chuck up to a distance of 425mm, reverse the movement, move the chuck until it reaches 300mm, and then reverse the movement again until the chuck reaches a gap of 425mm The elongation stress (N) at the time of being made was measured.

  As a result of the measurement, the extension stress in the stretch region where the lower waist elastic body 23B is disposed is 2.2N, and the stretch stress in the stretch region where the front lower waist elastic body 20B is disposed is 2.9N. As a result of the same measurement method, in the L size diaper 10, the former was 1.9N, the latter was 2.8N, and in the XL size diaper 10, the former was 2.6N and the latter was 3.2N.

  Referring to FIG. 2 again, as described above, both side edges 35c and 35d of the liquid-absorbent core 35 have a shape that is curved inward in the lateral direction X, and are prevented at the center of the crotch region 13. It is farthest from the base end 62 of the leakage cuff 60. The liquid absorbent core 35 is semi-rigid, which is higher in rigidity than the sheet member, and when the liquid absorbent core 35 is located in the vicinity of the base end portion 62, the base end portion 62 is affected by the rigidity. However, since the base end 62 and the liquid-absorbent core 35 are farthest apart from each other in the center of the crotch region 13 where most excreta accumulates, the standing of the leak-proof cuff 60 is inhibited. It is not done, and the side leakage of excrement can be prevented.

  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 base end part 62 of the leak-proof cuff 60 are mutually in the lateral direction X. It is separated. As described above, since the outer joint region 46 and the base end portion 62 are separated from each other, the side extension portion 61 and the leak-proof cuff 60 are independently affected without being affected by the mutual expansion and contraction action. You can stand up. However, as long as the side extension part 61 and the leak-proof cuff 60 stand independently from each other, the outer joining area 46 and the inner joining area 47 are continuous in order to simplify the manufacturing process of the diaper 10. It may be applied to the covering sheet 32.

<Modification>
FIG. 7 is an enlarged view similar to FIG. 5 in an example of a modified example of the diaper 10. The basic configuration of the diaper 10 of the present modification is the same as that of the present embodiment, and only differences will be described below.

  In this modification, both side edge portions of the liquid absorbing structure 30, that is, a part of the hydrophilic layer 50 is bent together with both side portions 42 of the covering sheet 32, and the inner surface sheet 31 is opposed to it through the bonding area 81. It is fixed. In this modification, since the most laminated portion 82 of the side extending portions 61 having the largest number of laminated layers has a 13-layer structure, both side edges of the absorbent panel 16 are compared with those of the first embodiment. It is thick and stiffer.

  In the present specification, as an example of a disposable wearing article, a diaper 10 constituted by three panel members including front and rear waist panels 14 and 15 that form front and rear waist regions 11 and 12 and an absorption panel 16 that forms a crotch region 13. However, the front and rear waist panels 14 and 15 may be formed not from separate bodies but from a single annular waist panel that continuously extends in the direction around the waist.

  For each constituent member constituting the disposable wearing article of the present invention, various known materials that are usually used in this kind of article can be used without limitation in addition to the materials described in the specification. In the specification and claims, terms such as “first” and “second” are used to simply distinguish similar elements, positions, and the like.

10 Diapers (wearing articles)
11 front waist region 12 rear waist region 13 crotch region 14 front waist panel 15 rear waist panel 16 absorbent panel 19A front end 19B rear end 20 front waist elastic body 20B front lower waist elastic body 23 rear waist elastic body 23B rear lower waist elastic Body 31 Inner surface sheet 31A Inner surface sheet extended portion 32 Cover sheet 34 Leak-proof film 35 Absorbent core 36 Core wrap sheet 36A Core wrap sheet extended portion 50 Hydrophilic layer 51 First hydrophobic layer 52 Second hydrophobic Layer 60 Leak-proof cuff 61 Side extension 64 Cuff elastic body 65 Leg elastic body X Horizontal direction Y Vertical direction Z Thickness direction

Claims (9)

It has a longitudinal direction and a lateral direction, and a thickness direction, and has a skin facing surface and a non-skin facing surface, a front waist panel that forms a front waist region, a back waist panel that forms a back waist region, and the front and back waists In a disposable wearing article comprising an absorbent panel positioned between the panels and forming a crotch region, a liquid-absorbent core, and a pair of leak-proof cuffs extending in the longitudinal direction on the skin facing surface side of the absorbent panel,
The leak-proof cuff has a base end portion extending in the vertical direction and a free portion that can expand and contract in the vertical direction,
On the outer side in the lateral direction of the base end portion of the leak-proof cuff, a side extending portion extending in the longitudinal direction is located,
The side extension section, possess a hydrophilic layer and a hydrophobic layer covering the hydrophilic layer in the thickness direction,
The hydrophilic layer extends to both side edges of the absorbent panel, and the hydrophobic layer includes a first hydrophobic layer that covers the non-skin facing surface side of the hydrophilic layer, and the hydrophilic layer. A second hydrophobic layer covering the skin facing surface side, wherein the first hydrophobic layer is provided with a plurality of leg elastic bodies extending in the longitudinal direction. .   A hydrophilic inner surface sheet is disposed on the skin-facing surface side of the liquid absorbent core, and the hydrophilic layer extends further outward in the lateral direction from both side edges of the liquid absorbent core. The wearing article according to claim 1, wherein the wearing article is formed from an extended portion of the inner sheet.   It further has a liquid diffusible core wrap sheet encapsulating the liquid absorbent core, and the hydrophilic layer further extends in the lateral direction from the extended portion of the inner surface sheet and both side edges of the liquid absorbent core. The wearing article according to claim 2, wherein the wearing article is formed from an extending portion of the core wrap sheet extending outward. The wearing article according to claim 2 or 3 , wherein the extended portion of the inner surface sheet is bent toward the non-skin facing surface side of the liquid absorbing structure along a bending line extending in the longitudinal direction.   The first hydrophobic layer is formed of a hydrophobic coating sheet that forms an outer surface of the absorbent panel and a liquid-impervious leak-proof film that covers a bottom surface of the absorbent core, and A hydrophobic layer is formed from the both sides of the said covering sheet | seat which was bend | folded and fixed to the said skin opposing surface side of the said hydrophilic layer along the bending line extended in the said vertical direction. The wearing article according to crab.   A plurality of cuff elastic bodies extending in the vertical direction are disposed in the free portion of the leak-proof cuff, and the lateral separation dimension between the leg elastic bodies is the horizontal distance between the cuff elastic bodies. The wearing article in any one of Claims 1-5 larger than the separation dimension of a direction. Any The number of the laminated sheet forming the hydrophilic layer, the number of laminated first sheet forming the hydrophobic layer, of claims 1 to 6 is greater than the number of laminated sheets of sheet forming the second hydrophobic layer wearing article according to any.   The said absorption panel has the front-and-rear end part located in the said front-and-rear waist panel, The said front-and-rear waist panel each has several front-and-back waist elastic bodies extended in the said horizontal direction, The extension stress of the stretchable region in which the elastic body that overlaps the front end portion of the absorption panel in plan view is elastic to overlap the rear end portion of the absorption panel of the rear waist elastic body in plan view. The wearing article in any one of Claims 1-7 higher than the elongation stress of the expansion-contraction area | region where the body is arrange | positioned.   The liquid-absorbent core has both side edges that protrude inward in the lateral direction, and the leak-proof cuff is spaced apart from the liquid-absorbent core in the lateral direction at the center of the crotch region. The wearing article in any one of claim | item 1 -8.

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