WO2015198662A1

WO2015198662A1 - Disposable wearable article

Info

Publication number: WO2015198662A1
Application number: PCT/JP2015/058451
Authority: WO
Inventors: 守大尾; 賢一笹山; 邦彦桂川
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-06-27
Filing date: 2015-03-20
Publication date: 2015-12-30
Also published as: JP2016010515A

Abstract

　Provided is a disposable wearable article having excellent fit properties and capable of effectively preventing side leakage of body fluid. A liquid-absorbing structure (35) has: a first absorption part (41) fixed via joining regions (70, 71) to a covering sheet (36) for covering a bottom surface of a liquid-absorbent core (34), the first absorption part (41) being positioned in at least a crotch region (15); and a pair of second absorption parts (42) separated from and facing each other in a transverse direction (X) and extending in a longitudinal direction (Y), the second absorption parts (42) being folded and fixed over skin-facing surfaces of both lateral parts of the first absorption part (41). The second absorption parts (42) each have a surface for contacting a body during wearing, a proximal part (50) connected to the lateral part, a proximal part (50), and a distal part (51). The dimension (W6) in the transverse direction (X) of the joining regions (70, 71) in the crotch region (15) is larger than the dimension (W3) thereof in the transverse direction (X) in at least a front waist region (13) among front and rear waist regions (13, 14).

Description

Disposable wearing items

The present disclosure relates to disposable wearing articles such as disposable wearing articles, disposable toilet training pants, disposable incontinence pants, and disposable sanitary pants.

Conventionally, disposable wearing articles provided with means for preventing side leakage of body fluid are known. For example, Patent Document 1 discloses a disposable diaper including a diaper main body having front and rear waist regions and a crotch region, and a liquid absorbing structure.

JP 2002-78736 A

In the disposable diaper according to the invention disclosed in Patent Document 1, elastic members are disposed along both side edges of the liquid absorbing structure, and both sides of the liquid absorbing structure are caused by the contraction force of the elastic member when the diaper is worn. An edge part rises and an absorption part which has a pair of rising property is formed. In this way, by forming an absorption part having a rising property from a part of the liquid absorbing structure, it is possible to prevent body fluid from flowing from the center of the diaper to the lateral direction from leaking to the outside. , Part of it can be absorbed and retained.

However, since the sheet that forms the absorbent part having the rising property and the back sheet that forms the outer surface of the diaper are joined together by the adhesive applied to the entire opposite surface, the dimensions (height of the absorbent part that rises) (Dimension) becomes relatively small. Therefore, it is not possible to form a leak-proof wall having a sufficient height, and it is not possible to sufficiently prevent the side leakage of excrement. Moreover, there is a possibility that absorption parts that have risen at the center of the crotch region approach each other and are sandwiched between the wearer's cracks, thereby inducing leakage of bodily fluids.

An object of the present invention is to provide a disposable wearing article that includes an absorbent portion having a rising property and can effectively suppress side leakage of body fluid.

The present invention has a longitudinal direction and a lateral direction, a skin facing surface and a clothing facing surface, and a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, and at least the crotch region. The present invention relates to a disposable wearing article including a liquid-absorbing structure provided with a liquid-absorbing core.

In the wearing article of the present invention, the liquid absorbent structure is fixed to a covering sheet that covers the bottom surface of the liquid absorbent core via a bonding area, and at least a first absorbent portion located in the crotch area; A pair of second absorbing portions extending in the longitudinal direction, spaced apart from each other in the lateral direction and fixed on the skin facing surface of the first absorbing portion, and the second absorbing portion A proximal portion that is continuous with the first absorption portion, and a distal portion, and the joining region has at least the front waist region in the lateral direction in the crotch region, the front waist region being the front waist region Greater than the lateral dimension of

According to the disposable wearing article according to the present invention, the liquid absorption structure has the first absorbent part and the pair of second absorbent parts having a rising property located on the skin-facing surface side. It can be effectively prevented. Moreover, in the joining area | region of a liquid absorption structure and a coating sheet, since the width dimension in a crotch area is larger than the width dimension of the front waist area at least among front and back waist areas, a pair of 2nd absorption parts are a crotch area. In this case, they are close to each other and are not pinched by a fissure, and in the front waist region, they enter the thigh root and fit stably.

The drawings illustrate specific embodiments of the invention and include selective and preferred embodiments as well as essential configurations of the invention.
The front view of the disposable diaper in embodiment shown as an example of the disposable wearing article which concerns on this invention. The partially broken expanded view of a diaper in the state which extended each elastic body to the vertical direction and the horizontal direction of a diaper. The exploded perspective view of a diaper. (A) The partially broken expanded view of a liquid absorption structure. (B) The partially broken perspective view of a liquid absorption structure. FIG. 5 is a schematic cross-sectional view taken along line VV in FIG. 2. The top view of a liquid absorption structure which shows only a joining area | region with a coating sheet by dot shape. The enlarged view of the leg opening periphery in the wearing condition of a diaper. FIG. 8 is a schematic sectional view taken along line VIII-VIII in FIG. 7. (A) The figure which shows the state which cut out the 2nd absorption part from the diaper. (B) The figure which shows the state which cut out the 2nd absorption part from the diaper at the time of arrange | positioning a side part elastic body only to a distal part as a comparative example. (A) The partially broken expanded view of the liquid absorption structure in an example of the example of a change of a diaper. (B) The partially broken perspective view of a liquid absorption structure. Sectional drawing which follows the XI-XI line of FIG.10 (b). (A) The exploded view of the liquid absorption structure in an example of the further another modification of a diaper. (B) The perspective view of a liquid absorption structure. FIG. 13 is a schematic sectional view taken along line XIII-XIII in FIG.

The following embodiments relate to the disposable wearing articles shown in FIGS. 1 to 13 and include not only the indispensable structure of the invention but also the selective and preferred structures.
The pull-on diaper 10 shown as an example of the disposable wearing article of the present invention has a longitudinal direction Y and a lateral direction X, a longitudinal center line P that divides the dimension of the transverse direction X into two equal parts, and a dimension in the longitudinal direction Y bisected. And includes an absorption chassis 11 and an annular elastic waist panel 12.

The diaper 10 includes a skin facing surface and a non-skin facing surface on the opposite side, a front waist region 13, a rear waist region 14, a crotch region 15 located between the front and

rear waist regions

13, 14, a waist opening and a pair. Leg opening 16. The waist opening is defined by an annular elastic waist panel 12, and the pair of leg openings 16 is defined by an absorption chassis 11 and an annular elastic waist panel 12.

<Elastic waist panel>
Referring to FIG. 2, the elastic waist panel 12 includes a front waist panel 18 located in the front waist region 13 and a rear waist panel 19 located in the rear waist region 14. The front and

rear waist panels

18 and 19 are opposed to the intermediate

inner end edges

18a and 19a in the longitudinal direction Y while crossing the front and

rear end parts

30 and 31 of the absorbent chassis 11 and extending in the lateral direction X. The

outer end edges

18b and 19b extending in the lateral direction X, the

outer edges

18c and 19c extending downward from the

outer end edges

18b and 19b, and the inner sides connecting the

side edges

18c and 19c and the intermediate

inner edges

18a and 19a. A substantially trapezoidal shape is formed by the

edges

18d and 19d. Each of the side edges 18c of the front waist panel 18 and the side edges 19c of the rear waist panel 19 are overlapped with each other and connected by side seams 20 extending intermittently in the longitudinal direction Y, thereby forming a waist opening and a pair of legs. An opening 16 is defined. The side seams 20 are fused with sheets that overlap each other by embossing / debossing with heat or ultrasonic waves.

<Front and rear waist panels>
Referring to FIG. 2, the front and

rear waist panels

18 and 19 include

inner layer sheets

21 and 22 positioned on the skin facing surface side,

outer layer sheets

23 and 24 positioned on the clothing facing surface side, and a plurality of strips extending in the lateral direction X. Front and rear waist

elastic bodies

25 and 26 formed of a string-like or strand-like elastic material and attached so as to be shrinkable in a stretched state with, for example, a hot melt adhesive between the inner and

outer layer sheets

21, 22, 23, and 24 .

The front waist elastic body 25 is composed of an outer front waist elastic body 25A extending in the lateral direction X along the outer end edge 18b of the front waist panel 18 and a pair of inner front waist elastic bodies arranged to be opposed to each other in the lateral direction X. 25B. The rear waist elastic body 26 includes an outer rear waist elastic body 26A extending in the lateral direction X along the outer edge 19b of the rear waist panel 19 and a pair of intermediate rear waist elastic bodies disposed to face each other in the lateral direction X. 26B, and a pair of inner rear waist elastic bodies 26C that extend in a concave manner along the inner edge 19d and that are spaced apart from each other in the lateral direction X.

Various sheets constituting the front and

rear waist panels

18, 19, that is, the inner and

outer layer sheets

21, 22, 23, 24, are known, for example, a spunbond fiber nonwoven fabric or an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric. It can be formed from a fiber nonwoven fabric, a laminate sheet of a plastic film and a nonwoven fabric, or the like. The laminated sheets are joined to each other by, for example, a hot melt adhesive or the heat welding means applied intermittently to at least one of the inner surfaces. The front and rear waist

elastic bodies

25 and 26 have a fineness of about 300 to 1200 dtex and are stretched about 1.8 to 3.5 times from a contracted or relaxed state and fixed in a string or strand form. Can be formed from

<Absorption chassis>
Referring to FIG. 2, the absorption chassis 11 has a vertically long and substantially rectangular shape, and is connected to the skin facing surface of the front waist panel 18 and the skin end facing surface of the rear waist panel 19. It has an end portion 31 and an intermediate portion 32 that extends in the longitudinal direction Y between the front and

rear end portions

30 and 31 and forms part of the crotch region 15. In the present embodiment, the absorption chassis 11 and the liquid absorption structure 35 are substantially the same shape and size, and the front and

rear end portions

30, 31 and the intermediate portion of the absorption chassis 11 are the same as those of the liquid absorption structure 35. The front and rear end portions and the intermediate portion coincide with each other in plan view of the diaper.

Referring to FIGS. 2 and 3, the absorption chassis 11 includes a liquid-absorbing structure 35 having a liquid-permeable body-side liner 33 and an absorber 34 coated on the body side, and a clothing-facing surface side of the absorber 34. And a hydrophobic covering sheet 36 located therein. The body side liner 33 can be formed from, for example, a spunbond fiber nonwoven fabric or an SMS fiber nonwoven fabric subjected to a hydrophilic treatment. The covering sheet 36 is formed from, for example, a hydrophobic air-through fiber nonwoven fabric or a spunbond nonwoven fabric. Between the covering sheet 36 and the liquid-absorbing structure 35, a leak-proof sheet 37 formed from a plastic film having moisture permeability and liquid impermeability is disposed. A plurality of strand-like or string-like side elastic bodies 38 extending in the longitudinal direction Y are attached to the non-skin-facing surface sides on both sides of the liquid-absorbing structure 35 so as to be contractible in an extended state. The leak-proof sheet 37 is an option, and in the present embodiment,

joint portions

70 and 71 described later are provided for joining the liquid absorbing structure 35 and the leak-proof sheet 37, but the leak-proof sheet 37 is disposed. If not, the liquid absorbing structure 35 and the covering sheet 36 are joined.

The absorbent body 34 includes, for example, a liquid absorbent core 43 formed from an absorbent / discrete material of wood fluff pulp or super absorbent polymer particles, and a mass of about 10 to 20 g / m ² covering the entire liquid absorbent core. And a liquid-permeable cover sheet 44 formed of tissue paper.

Referring to FIG. 4A, the liquid absorbing structure 35 includes a first absorbent portion 41 located in the center portion and a pair of bent lines 40 located on both sides of the first absorbent portion 41 and extending in the longitudinal direction Y. And the second absorption part 42 located on both sides in the lateral direction X from the folding line 40. The second absorption part 42 is bent along the bending line 40 and is located in the first absorption part 41, for example, through the front end fixing part 45 and the rear end fixing part 46 coated with a hot melt adhesive. 41 is fixed. A plurality of side elastic bodies 38 are attached to the surface of the both side portions 42 opposite to the surface where the front and

rear fixing portions

45 and 46 are located. In this way, by folding the both side portions of the liquid absorption structure 35 inward and fixing the front and rear

end fixing portions

45 and 46, the side elastic body 38 is extended in the wearing state of the diaper 10 and second Absorber 42 rises toward the wearer's body. In the present embodiment, the front and rear

end fixing portions

45 and 46 are front and rear end portions of the liquid absorption structure 35 and are located on the proximal portion 50 side of the second absorption portion 42. The front and rear

end fixing portions

45 and 46 are positioned so as to overlap the elastic waist panel 12 in plan view.

Referring to FIG. 5, the second absorption portion 42 is continuous from the contact surface 59 A that contacts the wearer's body in the wearing state, the non-contact surface 59 B positioned on the opposite side, and the first absorption portion 41. It has the proximal part 50 and the distal part 51 located inward from the proximal part 50 (to the longitudinal centerline P side). Since the second absorption part 42 includes the absorbent body 34 and the liquid-permeable body side liner 33 that covers the body side, the entire surface (the contact surface 59A and the non-contact surface 59B) absorbs liquid. Have sex. The side elastic body 38 is located on the contact surface 59A side of the second absorption portion 42 and is disposed between the body side liner 33 and the liquid-permeable fixing sheet 52. The fixing sheet 52 is optional, and a side elastic body 38 can be disposed between the body side liner 33 and the absorbent body 34, but when the diaper 10 is manufactured, it is directly attached to the semi-rigid absorbent body 34. Compared with the case where the side elastic body 38 is attached to the side elastic member 38, the side elastic body 38 can be attached more stably by interposing the fixing sheet 52. For convenience, the second absorbent portion 42 is divided into a first section 61 located on the distal portion 51 side and a second section 62 located on the proximal portion 50 side, which divides the width dimension into two equal parts. The

The mass per unit area of the liquid absorbing structure 35 in the first and second absorption parts 41 and 42 (however, excluding the bonding material for bonding the constituent members) is about 200 to 600 g / m ² , preferably About 350 to 450 g / m ² , and the entire thickness of the liquid absorbing structure 35 is substantially uniform. However, the thickness of the first absorption part 41 may be larger than that of the second absorption part 42 in order to absorb and retain a larger amount of body fluid in the first absorption part 41, and conversely, the second absorption. The thickness of the part 42 may be larger than that of the first absorption part 41. In particular, in the latter case, the second absorbent portion 42 has a relatively high rigidity, and is difficult to break even if it is sandwiched between the wearer's crotch portions, so that the raised state can be maintained.

The side elastic body 38 is formed of a string-like or strand-like elastic material having a fineness of about 400 to 1200 dtex and stretched and fixed about 1.8 to 4.0 times from a contracted or relaxed state. can do. The side elastic bodies 38 are evenly arranged over the entire width dimension (dimension in the lateral direction X) from the proximal portion 50 to the distal portion 51 of the second absorbent portion 42, and the entire second absorbent portion 42 expands and contracts. Have sex. Here, “the side elastic bodies 38 are evenly arranged” is a dimension in design and includes a slight dimensional error that occurs in an actual manufacturing process. However, as long as the effects of the present invention to be described later are obtained, the side elastic body 38 may be disposed at least in a part thereof, not the entire second absorbing portion 42. Moreover, you may form from elastic sheets, such as a stretchable fiber nonwoven fabric arrange | positioned in the both areas across the 2nd area 62 from the 1st area 61 instead of a string-form or strand-shaped elastic material.

The width dimension W1 of the second absorber 42 is about 20 to 60 mm, and the separation dimension R1 (pitch) between the side elastic bodies 38 is about 5 to 15 mm. In order that the 2nd absorption part 42 stands up in the wearing state of the diaper 10, and the contact surface 59A fits a wearer's body in planar shape, it is necessary for the 2nd absorption part 42 whole to have a required elongation stress. It is. If the separation dimension R1 is an appropriate size, and the fineness and the expansion ratio of the side elastic body 38 are within the above-described preferable ranges, the second absorbent portion 42 exhibits the required elongation stress. sell. In addition, the extension stress of the side elastic body 38 may be substantially equal, or the extension stress can be changed by changing the extension magnification partly as necessary.

Referring to FIGS. 2 and 3, both side portions of the covering sheet 36 are bent inward, and the front and rear end portions thereof are on the liquid absorbing structure 35 (on the second absorbing portion 42) via the joint portion 65. It is fixed to. On both sides, the fineness is about 300 to 1000 dtex extending in the longitudinal direction Y, and is stretched about 1.6 to 3.0 times from the contracted or relaxed state to form a plurality of strings or strands A flap elastic body 63, which is an elastic material, is disposed. By arrange | positioning the flap elastic body 63, the elastic side flap 64 which stands up to a wearer's body side is formed in the both-sides part in the wearing state of the diaper 10 by the contraction effect | action.

Referring to FIGS. 5 and 6, the liquid absorbing structure 35 is applied to the surface of the covering sheet 36 (or the leakage preventing sheet 37 when the leakage preventing sheet 37 is disposed) facing the liquid absorbing structure 35. For example, it is fixed to the cover sheet 36 (or the leak-proof sheet 37 when the leak-proof sheet 37 is arranged) via the joining

regions

70 and 71 formed of a hot melt adhesive. The

joint regions

70 and 71 are located at the center in the lateral direction X of the liquid absorbing structure 35 and extend at the front and rear end edges in the longitudinal direction Y, and on both sides of the central joint region 70 in the lateral direction X. And a side junction region 71 located at a predetermined distance. The side joint region 71 is located on the lower surface of the proximal portion 50 of the second absorbent portion 42, and the front and rear end

joint portions

71A and 71B located on the front and rear end edge sides of the liquid absorbing structure 35, and the front and rear end joint portion 71A. , 17B and an intermediate joint 71C. The intermediate joint portion 71C, the front end joint portion 71A, and the rear end joint portion 71B are located apart from each other in the vertical direction Y by a given dimension. A side non-joining area 74 is defined between the intermediate joint portion 71C and the front and rear end

joint portions

71A and 71B.

As for each dimension, in the liquid absorbing structure 35, the dimension L1 in the longitudinal direction Y is about 600 to 800 mm, the dimension W3 in the lateral direction X of the central joining area 70 is about 150 to 250 mm, and between the side joining areas 71C in the crotch area. The dimension W4 in the lateral direction X is about 200 to 300 mm. Further, the width dimension W2 of the liquid absorbing structure 35 is about 250 to 350 mm, the distance dimension W5 between the distal portions of the pair of second absorbent parts 42 is about 150 to 200 mm, and the dimension in the longitudinal direction Y of the side non-joining area 74. L2 is about 150 to 250 mm. Further, in order to prevent the second absorbent portions 42 from coming into contact with each other when worn, it is necessary that the correlation in each dimension is (dimension 2 -dimension 3) × 2 <(dimension W5). In addition, it is preferable that the side joint portion 71C exists at a position overlapping the second absorption portion 42 in plan view. That is, the lateral separation dimension between the distal parts of the pair of second absorption parts is a value obtained by multiplying 2 by the value obtained by subtracting the lateral dimension of the central joint area from the lateral dimension X of the liquid absorbing structure. Is bigger than. Since the dimensions W2, W3, and W5 have such a correlation, the front end portion of the liquid absorbing structure 35 is sandwiched between the thighs of the wearer, and the one side of the liquid absorbing structure 35 in the non-side non-joining region 74. Even if the portion is bent, there is no fear that the distal portion 51 of the second absorbent portion 42 contacts or overlaps. Moreover, as long as the dimension W3 is smaller than the dimension 4, it can be suitably set to a free size.

In such a joining mode, the center of the liquid-absorbing structure 35 is stably fixed to the covering sheet 36 via the central joining area 70, while the entire opposite surface of the liquid-absorbing structure 35 is covered with the hot-melt adhesive. Therefore, as compared with the case where the entirety is fixed to the covering sheet 36 with a hot melt adhesive, the absorbent chassis 11 has flexibility as a whole. Moreover, since the side joining area | region 71 is located in the lower surface of the proximal part 50 of the 2nd absorption part 42, when wearing the diaper 10 as above-mentioned, the 2nd absorption part 42 starts from the proximal part 50. Can get up toward the wearer's body.

7 and 8, when the diaper 10 is worn, the second absorbent portion 42 rises toward the wearer's body 17 due to the contraction force of the side elastic body 38. Normally, when a side flap or the like is raised due to the contraction force of the elastic body, only the distal portion where the elastic body is disposed contacts the wearer's body and the entire side flap fits the wearer's body in a planar shape. It becomes difficult. In the diaper 10 according to the present embodiment, the side elastic bodies 38 are evenly arranged over the entire width of the second absorbent portion 42, and the side elastic bodies 38 of the first area 61 and the second area 62 are used. Since the shrinkage dimensions are substantially the same, not only the distal portion 51 but the entire abutment surface 59A abuts the wearer's thigh substantially in a planar shape. Therefore, compared with the case where only the distal portion 51 is in contact with the wearer's body, the contact area with the body is large, the fitting property is excellent, and the body fluid that has reached the body can be reliably absorbed and retained.

As shown by phantom lines in FIG. 8, when the liquid absorbing structure 35 is fixed indirectly or directly to the covering sheet 36 only through the central joint area 70 in the crotch area 15, that is, in the side joint area 71. When the intermediate joint portion 71C does not exist, in the worn state, the crotch region 15 is sandwiched between the inseam of the wearer so that the second absorbent portions 42 come into contact with each other, and the distal portions 51 thereof. May get into the wearer's crack. In such a case, the diaper 10 takes a form like a loincloth and the wearer's buttocks are exposed, which not only greatly impairs the appearance but also causes the leakage of excrement. In particular, as in the diaper 10 of the present embodiment, the front and

rear waist regions

13 and 14 are formed from separate front and

rear waist panels

18 and 19, and the front and

rear end portions

30 and 31 of the absorbent chassis 11 are attached to the pants. In the case of the diaper 10 having a shape, the absorption chassis 11 including the liquid-absorbent core 43 that has absorbed body fluid slides down and is sandwiched between the crotch of the wearer, and such a situation is likely to occur.

On the other hand, when the entire width dimension of the liquid absorbing structure 35 is directly or indirectly fixed to the covering sheet 36 on the front and

rear waist regions

13 and 14 side of the absorption chassis 11, the second absorption is performed at the front end 30. The part 42 cannot enter the root of the wearer's thigh and the fit property is lowered, and the liquid absorbing structure 35 cannot cover the entire buttocks of the wearer on the rear end portion 31 side.

In the diaper 10 according to the present embodiment, since the liquid absorbing structure 35 is fixed to the covering sheet 36 via the central joint region 70 and the intermediate joint portion 71C in the intermediate portion 32 located in the crotch region 15, The 2nd absorption part 42 does not mutually approach, and they are not pinched by the crack. In addition, in the front and

rear end portions

30 and 31 located on the front and

rear waist regions

13 and 14 side, the side non-joining region 74 is located and the proximal portion 50 of the second absorbent portion 42 is not fixed to the covering sheet 36. The second absorption portion 42 rises upward without being obstructed by the movement of the covering sheet 36, and the height dimension of the front and

rear end portions

30 and 31 is larger than that of the intermediate portion 32. Therefore, the front end portion 30 is fitted between the wearer's thigh roots, and the rear end portion 31 covers the entire buttock portion with the raised second absorption portion 42.

Thus, the width W of the joining

areas

70 and 71 in the intermediate part 32 and the front and

rear end parts

30 and 31 is different, that is, the dimension W6 in the lateral direction X of the joining

areas

70 and 71 in the intermediate part 32 (this In the embodiment, the same as dimension 2) is made larger than the dimension W3 in the lateral direction X of the joint area 70 in the front and

rear end portions

30, 31, and thus the rising mode of the second absorption portion 42 can be changed, and excrement It is possible to effectively realize leakage prevention and fit along the body shape. In particular, at the front end portion 30, the degree of freedom is increased by making the second absorbent portion 42 free without being fixed to the covering sheet 36, and fits to the thigh root having a different shape and depth for each wearer. Can be made. Therefore, it is preferable that at least the width dimension W 3 of the joining

regions

70 and 71 of the front end portion 30 is smaller than the width dimension of the intermediate portion 32.

In the present embodiment, the front and rear

end joining regions

71A and 71B are exceptionally positioned on the edge sides of the front and

rear end portions

30 and 31. In this portion, the width dimension W3 of the joining

areas

70 and 71 of the front and

rear end portions

30 and 31 and the width dimension W6 of the intermediate portion 32 are the same. By disposing the front and rear

end joining regions

71A and 71B on the edge side, the liquid absorbing structure 35 and the covering sheet 36 can be more stably fixed. In particular, the corners of the liquid absorbing structure 35 are distorted. This can be suppressed. Therefore, in the present embodiment, “the joining

areas

70 and 71 are such that the dimension W6 in the lateral direction X in the crotch area 15 is larger than the dimension W3 in the lateral direction X of the front and

rear waist areas

13 and 14”. W6 is larger than the size of the portion excluding the edge of the front and rear waist region where the front and rear end

joint regions

71A and 71B exist, or ii) the front and rear end

joint regions

71A and 71B are in the front and

rear waist regions

13 and 14, respectively. Since it does not exist, it means that the dimension W6 becomes larger than the dimension W3.

Since the second absorbent portion 42 includes a compression-elastic liquid-absorbing core 34 inside thereof and has a required thickness and rigidity, for example, compared to a side flap formed only from a sheet member having elasticity in a conventional diaper, for example. It is possible to suppress the formation of a gap that fits stably by the wearer's body and causes leakage of bodily fluid between the body 17 and the second absorption portion 42. Moreover, in the case of a diaper in which the front and

rear waist regions

13 and 14 are respectively formed from separate front and

rear waist panels

18 and 19 as in the present embodiment, the absorption chassis 11 that has absorbed body fluid is moved from its proper position by its own weight. Since the second absorbent portion 42 fits the body in a relatively wide range, it is possible to prevent such slipping down because the second absorbent portion 42 fits to the body relatively easily.

Since the second absorption part 42 fits the wearer's body in a planar shape as a whole, it can be said that the absorption efficiency is higher than when only part of the second absorption part 42 fits and absorbs body fluid. In the present embodiment, since the entire surface of the second absorbent portion 42 has liquid absorbency, the excreted body fluid is first removed from the skin facing surface of the first absorbent portion 41 and the second absorbent portion 42. The light passes through the contact surface 59B and is absorbed and held by them. Next, the bodily fluid that has passed the body and moved to the outer surface side beyond the apex of the second absorption portion 42 is absorbed and held from the contact surface 59A. However, as long as the required body fluid is absorbed and held in the first absorption part 41, the non-contact surface 59B of the second absorption part 42 may not be liquid-absorbing but liquid-impermeable. In such a case, absorption of body fluid from the non-contact surface 59B can be suppressed, while leakage of excrement moving in the lateral direction X in the diaper 10 can be effectively prevented.

The side flap 64 of the covering sheet 36 rises toward the wearer's body by the contraction force of the flap elastic body 63 outside the second absorbent portion 42. The width dimension W1 of the second absorbent portion 42 is larger than the width dimension of the side flap 64. Specifically, in the crotch region 15, from the side edge of the crotch region 15 to the side edge of the distal portion 51 of the second absorbent portion 42. The dimension in the lateral direction X is larger than the dimension in the lateral direction X from the side edge of the crotch region 15 to the distal portion of the covering sheet 64. Therefore, in a state where the second absorbent portion 42 and the side flap 64 are raised, the second absorbent portion 42 is higher than the side flap 64 and is more fitted to the wearer's body. The side flap 64 is preferably liquid-impervious or water-repellent, moves through the wearer's body toward the contact surface 59A of the second absorbent portion 42, and is not absorbed by the contact surface 59A. It functions as a leak-proof wall that prevents leakage. Further, the second absorbent portion 42 raised by the contracting action of the side elastic body 38 is easily sandwiched between the thigh roots and easily folds outward. Is prevented from folding outward. That is, the side flap 64 forms a double leak-proof wall together with the second absorption part 42 and plays a role of assisting the rising of the second absorption part 42. Further, as described above, in the diaper 10 in which the front and

rear waist regions

13 and 14 are formed from the separate front and

rear waist panels

18 and 19, the absorption chassis 11 is likely to slide down from an appropriate position by its own weight after absorbing body fluid. However, since not only the second absorption part 42 but also the side flaps 64 are fitted to the body, such sliding down can be prevented.

FIG. 9A is a diagram showing a state in which the second absorbent portion 42 is cut out from the diaper 10 in the present embodiment and the side elastic body 38 is contracted (unweared state), and FIG. As a comparative example, in the 2nd absorption part 42, it is a figure which shows the state which attached the side part elastic body 38 only to the distal part 51, cut it out from the diaper, and the side part elastic body 38 was contracted. Referring to FIG. 9A, the second absorbent portion 42 cut out from the diaper 10 is arranged with the side elastic bodies 38 spaced apart equally from the proximal portion 50 to the distal portion 51. Therefore, the first area 61 and the second area 62 are not deformed and have a three-dimensional shape with the contact surface 59A surrounding the central space (having a required height) as an inner peripheral wall as a whole. Thus, the 2nd absorption part 42 has risen in the unwearing state cut out from the diaper 10 by the shrinkage | contraction dimension of the 2nd absorption part 42 as a whole or at least the distal part 51 and the proximal part 50 being substantially the same. become. Furthermore, in the state where the second absorbent portion 42 is cut out from the product, the shrinkage dimension of the first area 61 and the shrinkage dimension of the second area 62 are substantially equal (specifically, within 0 to 10%). Dimensional difference).

Referring to FIG. 9B, as a comparative example, when the side elastic body 38 is attached only to the distal portion 51 of the second absorbent portion 42, the contraction amount of the distal portion 51 is close. Since the contraction dimensions of the proximal portion 50 and the distal portion 51 are different from each other, and the second absorbing portion 42 forms a peripheral wall as shown in FIG. 9A. It is not a three-dimensional shape, but a flat ring shape. As is clear from the configuration of the second absorbent portion 42 in the non-wearing state shown in FIGS. 9A and 9B, in order to realize the rising and planar fit of the second absorbent portion 42, the side The number of the side elastic bodies 38 (pitch), the fineness, and the expansion ratio are set so that the partial elastic bodies 38 are arranged in the first and

second sections

61 and 62 and a three-dimensional shape as shown in FIG. It is necessary to adjust various conditions such as.

<Modification 1>
Referring to FIGS. 10A, 10 B, and 11, in this modified example, a concave groove (bending guide) extending in the vertical direction Y is formed in a portion overlapping with the bending line 40 on both sides of the liquid absorbing structure 35. Groove) 80 is formed. The concave groove 80 of the liquid absorbing structure 35 is a portion where the liquid absorbing core 43 is not present or the mass per unit area is lower and thinner than other portions. By arranging the concave groove 80 partially, particularly in the crotch region 15, a region where the second absorbent portion 42 is easily contracted in the longitudinal direction Y is formed, and the rising property and the surface fitting property of the second absorbent portion 42 are formed. Will improve. Further, since the concave groove 80 is formed so as to overlap with the bending line 40, the second absorbing portion 42 can be easily bent inward in the manufacturing process.

<Modification 2>
Referring to FIGS. 12 and 13, in the present modified example, the first absorption part 41 and the second absorption part 42 of the liquid absorption structure 35 are formed separately. Specifically, the first absorption part 41 includes a first body side liner 33A and a first absorbent core 34A covered with the first body side liner 33A, and the second absorption part 42 includes a second body side liner 33B. And the second absorbent body 34B coated thereon. The second absorption portion 42 is joined to the first absorption portion 41 via a fixing portion 82 and front and rear

end fixing portions

45 and 46 that continuously extend in the longitudinal direction Y along both side edges. The second absorption part 42 has a proximal part 50 fixed via a fixing part 82 and a distal part 51 located inside the proximal part 50 in the lateral direction X. Also in this embodiment, the contact surface 59 A of the second absorption part 42 has hydrophilicity and rises toward the wearer's body by the contraction force of the side elastic body 38.

As the constituent materials constituting the diaper 10 of the present invention, various known materials that are usually used in this type of field can be used without limitation, unless otherwise specified. Further, the front and

rear waist regions

13 and 14 are not configured from the front and

rear waist panels

18 and 19, and the front and

rear waist regions

13 and 14 and the crotch region 15 may be formed from an integral panel.

The disclosure relating to the present invention described above can be summarized in at least the following matters.
It has a longitudinal direction and a lateral direction, a skin facing surface and a clothing facing surface, and is arranged in the front waist region, the rear waist region, the crotch region located between the front and rear waist regions, and at least the crotch region, In a disposable wearing article including a liquid-absorbing structure including a liquid-absorbent core, the liquid-absorbing structure is fixed to a cover sheet that covers a bottom surface of the liquid-absorbent core via a bonding area, and at least A pair of second absorbers extending in the longitudinal direction and spaced apart from each other in the lateral direction and fixed on the skin facing surface of the first absorber, and the first absorber located in the crotch region The second absorption part has a proximal part that is continuous with the first absorption part, and a distal part, and the junction area has a lateral dimension in the crotch area, At least the front waist of the front / rear waist area Greater than the lateral dimensions of the bets area.

The disposable wearing article according to the present invention disclosed in the above paragraph includes at least the following embodiment, which may be used alone or in combination.
(1) The joining area has a center joining area for fixing the center part extending in the longitudinal direction of the first absorption part, and a side joining area for fixing both side parts of the first absorption part. The side joint area is spaced apart from the central joint area by a given dimension in the lateral direction, and is provided with an intermediate joint located in the crotch area, the crotch joint and the longitudinal direction. And front and rear end joints that are spaced apart from each other.
(2) A side elastic body extending in the longitudinal direction is disposed in the second absorption portion.
(3) The second absorption part has a first area located on the distal part side and a second area located on the proximal part side, which bisects the width dimension, and is worn The vertical dimension in the contracted state of the first zone is smaller than the vertical dimension in the contracted state of the second zone, while the second absorbent part is separated from the first absorbent part. Sometimes, the longitudinal dimension in the contracted state of the first section is approximately equal to the longitudinal dimension in the contracted state of the second section.
(4) At least a surface of the outer surface of the second absorption portion that comes into contact with the wearer's body has hydrophilicity.
(5) It further has a leak-proof sheet positioned between the liquid absorbing structure and the covering sheet.
(6) A flap elastic body extending in the longitudinal direction is attached to both sides of the covering sheet.
(7) The first absorbent part and the second absorbent part are integrally formed, and the second absorbent part is formed by being bent toward the skin facing surface side of the first absorbent part. And a concave groove extending in the longitudinal direction is arranged in the bent portion, and the mass per unit area of the liquid-absorbent core in the concave groove is larger than that in other portions of the liquid-absorbing structure. Low or absent said absorbent core.
(8) A front waist panel that defines the front waist region, a rear waist panel that defines the rear waist region, and an absorbent chassis having the liquid absorbing structure, and front and rear ends of the absorbent chassis Is fixed to the front and rear waist panels.
(9) The distance between the distal portions of the pair of second absorption portions is a value obtained by subtracting the horizontal size of the central joint area from the horizontal size X of the liquid absorbing structure. It is larger than the value multiplied by.

10 Disposable wearing articles (disposable diapers)
12 Waist panel 13 Front waist region 14 Rear waist region 15 Crotch region 18 Front waist panel 19 Rear waist panel 33 Body side liner 34 Absorbent core 35 Liquid absorbing structure 36 Cover sheet 37 Leakproof sheet 38 Side elastic body 40 Bending Line 41 1st absorption part 42 2nd absorption part 50 Proximal part 51 of 2nd absorption part Distal part 61 of 2nd absorption part 1st area 62 2nd area 63 Flap elastic body 70 Central junction area 71

Side junction area

71A , 71B Front / rear end joint 71C Intermediate joint 73 Central non-joint area 74 Side non-joint 80 Concave groove (bending guide groove)
X transverse direction Y longitudinal direction W2 transverse dimension W3 of the liquid absorbing structure transverse dimension W5 of the central joint region transverse dimension between the distal parts of the second absorbent part

Claims

It has a longitudinal direction and a lateral direction, a skin facing surface and a clothing facing surface, and is arranged in the front waist region, the rear waist region, the crotch region located between the front and rear waist regions, and at least the crotch region, In a disposable wearing article comprising a liquid-absorbing structure with a liquid-absorbent core,
The liquid-absorbing structure is fixed to a cover sheet that covers the bottom surface of the liquid-absorbent core via a bonding area, and is at least spaced apart from the first absorption part located in the crotch area in the lateral direction. And a pair of second absorbent parts fixed on the skin-facing surface of the first absorbent part and extending in the longitudinal direction,
The second absorption part has a proximal part continuous with the first absorption part and a distal part,
The wearing article, wherein the joint area has a lateral dimension in the crotch area that is larger than at least the lateral dimension of the front waist area in the front and rear waist areas.
The bonding area has a central bonding area for fixing a central part extending in the longitudinal direction of the first absorption part, and a side bonding area for fixing both side parts of the first absorption part, The side joining area is located at a given distance in the lateral direction from the central joining area, and is spaced apart by a given dimension in the longitudinal direction from the intermediate joining part located in the crotch area and the crotch joining part. The wearing article of Claim 1 which has a front-and-rear end junction part located.
The wearing article according to claim 1 or 2, wherein a side elastic body extending in the longitudinal direction is disposed in the second absorbent portion.
The second absorption part has a first area located on the distal part side and a second area located on the second proximal part side, which bisects the width dimension, and in a worn state The vertical dimension in the contracted state of the first section is smaller than the vertical dimension in the contracted state of the second section, while the second absorbent part is separated from the first absorbent part. The wearing article according to any one of claims 1 to 3, wherein the dimension in the longitudinal direction in the contracted state of the first section and the dimension in the longitudinal direction in the contracted state of the second section are substantially equal.
The wearing article according to any one of claims 1 to 4, wherein at least a surface of the outer surface of the second absorption portion that comes into contact with the wearer's body has hydrophilicity.
The wearing article according to any one of claims 1 to 5, further comprising a leak-proof sheet positioned between the liquid-absorbing structure and the covering sheet.
The wearing article according to any one of claims 1 to 6, wherein a flap elastic body extending in the longitudinal direction is attached to both sides of the covering sheet.
The first absorption part and the second absorption part are integrally formed, and the second absorption part is formed by being bent toward the skin facing surface side of the first absorption part, A concave groove extending in the longitudinal direction is arranged in the bent portion, and the mass per unit area of the liquid-absorbent core is lower in the concave groove than in other portions of the liquid-absorbing structure or the The wearing article according to any one of claims 1 to 7, wherein the absorbent core is absent.
A front waist panel that defines the front waist region; a rear waist panel that defines the rear waist region; and an absorbent chassis having the liquid absorbing structure; The wearing article according to any one of claims 1 to 8, which is fixed to the waist panel.
The lateral dimension between the distal portions of the pair of second absorbent parts is a value obtained by subtracting the lateral dimension of the central joint region from the lateral dimension X of the liquid absorbing structure. The wearing article according to any one of claims 2 to 9, which is larger than a value obtained by multiplying by two.