JP2016010515A - Disposable object for wearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable object for wearing excellent in fitting property and capable of efficiently preventing lateral leakage of a body fluid.SOLUTION: A fluid absorption structure 35 comprises: a first absorption part 41 which is fixed to a non-transmissive coating sheet 36 for covering a bottom face of a fluid absorption core 34 via jointing areas 70, 71 and which is positioned on at least a crotch area 15; and a pair of second absorption parts 42 which extend in a vertical direction Y and are separated and face in a lateral direction X, are fixed to skin facing surfaces on both side parts of the first absorption part 41 in an inward tilted state. The second absorption parts 42 comprise: a surface coming into contact with a body in a wearing state; a base side edge part 50 connected to both side parts; and a free side edge part 51 extending in the vertical direction Y in parallel to the base side edge part 50. The jointing areas 70, 71 are configured so that a dimension W6 in the lateral direction X on the crotch area 15 is larger than a dimension W3 in the lateral direction X of at least a front waist area 13 among front and rear waist areas 13, 14.

Description

  The present invention 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 stands up, and the absorption part which has a pair of stand-up property is formed. In this way, by forming an absorbent portion having uprightness from a part of the liquid absorption structure, it is possible to prevent body fluid that flows from the center of the diaper from flowing laterally from leaking to the outside. , Part of it can be absorbed and retained.

  However, since the sheet that forms the absorbent part having the standing property and the back sheet that forms the outer surface of the diaper are bonded via the adhesive applied to the entire opposing surfaces, the dimensions of the absorbent part to stand up (Height 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 the absorption parts standing up in the central part 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 uprightness and can effectively prevent side leakage of body fluid.

  In order to solve the above problems, the present invention has a longitudinal direction and a transverse direction perpendicular thereto, a skin facing surface and a clothing facing surface, and a front waist region, a rear waist region, and a front waist region. The present invention relates to a disposable wearing article including a crotch region that is positioned and a liquid-absorbing structure having a liquid-absorbent core disposed at least in the crotch region.

  In the pant-type wearing article of the present invention, the liquid-absorbing structure is fixed to a liquid-impervious covering sheet that covers the bottom surface of the liquid-absorbent core via a bonding area, and is positioned at least in the crotch area. And a pair of second absorption parts extending in the vertical direction, spaced apart from each other in the lateral direction and fixed on the skin-facing surface of the first absorption part, The second absorption part has a base side edge part continuous with the first absorption part, and a free side edge part extending in the vertical direction in parallel with the base side edge part, The lateral dimension in the crotch region is larger than at least the lateral dimension of the front waist region in the front and rear waist regions.

  According to the disposable wearing article according to the present invention, the liquid absorbing structure has the first absorbent part and the pair of second absorbent parts having an upright position 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 sandwiched between cracks, and in the front waist region, they enter the groin and are stably fitted.

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. The typical sectional view which meets the VV line of Drawing 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. Typical sectional drawing which follows the VIII-VIII line of FIG. (A) The figure which shows a mode that the 2nd absorption part was cut out from the diaper and it was set as the natural state. (B) The figure which shows a mode that the 2nd absorption part was cut out from the diaper and was made into the natural state at the time of arrange | positioning a side part elastic body only to a free side edge 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. FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG. (A) The exploded view of the liquid absorption structure in an example in the further another modification of a diaper, (b) The perspective view of a liquid absorption structure. FIG. 13 is a schematic cross-sectional view taken along line XIII-XIII in FIG.

  The pants-type diaper 10 shown as an example of the disposable wearing article of the present invention has a longitudinal direction Y and a transverse direction X orthogonal thereto, a longitudinal center line P that divides the dimension of the transverse direction X into two equal parts, and a longitudinal direction Y. It has a horizontal center line Q that bisects the dimensions, 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 together by overlapping sheets by embossing 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, 26 formed of a string-like or strand-like elastic material and attached so as to be shrinkable in a stretched state between the inner and outer layer sheets 21, 22, 23, 24 via a hot melt adhesive. Have.

  The front waist elastic body 25 is composed of an upper front waist elastic body 25A extending in the lateral direction X along the outer edge 18b of the front waist panel 18 and a pair of lower front waist elastic bodies disposed to face each other in the lateral direction X. 25B. The rear waist elastic body 26 includes an upper rear waist elastic body 26 </ b> A extending in the lateral direction X along the outer edge 19 b 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 lower 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.

  The 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 fiber nonwoven fabrics such as spunbond fiber nonwoven fabrics or SMS (spunbond / meltblown / spunbond) fiber nonwoven fabrics. It can be formed from a laminate sheet of a plastic film and a nonwoven fabric. The sheets laminated on each other are bonded to each other by a hot melt adhesive applied intermittently to at least one of the inner surfaces or the heat welding means. The front and rear waist elastic bodies 25, 26 have a fineness of about 300 to 1200 dtex, and are stretched about 1.8 to 3.5 times from the 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, an SMS fiber nonwoven fabric or the like that has been subjected to a hydrophilic treatment. The covering sheet 36 is formed from 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 air 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, the joining portions 70 and 71 described later are for joining the liquid absorbing structure 35 and the leak-proof sheet 37. When not disposed, the liquid absorbing structure 35 and the covering sheet 36 are joined.

The absorbent body 34 has a liquid absorbent core 43 formed of an absorbent / discrete material such as fluffed wood pulp or superabsorbent polymer particles, and a mass of about 10 to 20 g / m ² covering the entire liquid absorbent core. And a liquid-permeable core wrap sheet 44 formed of tissue paper or the like.

  Referring to FIG. 4A, the liquid absorption structure 35 includes a first absorption portion (center portion) 41 and a pair of bending lines 40 that are located on both sides of the first absorption portion 41 and extend in the longitudinal direction Y. And a second absorption portion (both side portions) 42 located on the outer side in the lateral direction X from the bending line 40. The second absorption part 42 is bent along the folding line 40 and is subjected to a first absorption via a front end fixing part 45 and a rear end fixing part 46 formed by applying a hot melt adhesive located in the first absorption part 41. It is fixed to the part 41. 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, the side elastic body 38 is fixed in the wearing state of the diaper 10 by inclining (inside down) the both side portions of the liquid absorption structure 35 and fixing them through the front and rear end fixing portions 45 and 46. The second absorbent portion 42 is extended and stands 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 base edge 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 </ b> A that contacts the wearer's body in the wearing state, the non-contact surface 59 </ b> B positioned on the opposite side, and the first absorption portion 41. It has the base side edge part 50 and the free side edge part 51 located inward from the base side edge part 50 (to the vertical centerline P side). Since the second absorbent portion 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) is hydrophilic. Have 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. Further, for convenience, the second absorbent portion 42 is divided into a first area 61 located on the free side edge 51 side and a second area 62 located on the base edge 50 side, which divides the width dimension into two equal parts. It is divided.

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 thickness of the entire 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 absorbing portion 42 has a relatively high rigidity, and even when sandwiched between the wearer's groin portions, the second absorbing portion 42 is not easily laid down, and can maintain an upright state.

  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 base side edge 50 to the free side edge 51 of the second absorption part 42, and the second absorption part 42 as a whole. Has elasticity. 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 described later are exhibited, the side elastic body 38 may be disposed at least at 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 both areas over the 1st area 61 and the 2nd area 62 instead of a string-form or strand-shaped elastic material.

  The width dimension W1 of the second absorption part 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 cuff elastic body 63 which is an elastic material is disposed. By disposing the cuff elastic body 63, a barrier cuff (three-dimensional cuff) 64 is formed so that both side portions stand on the wearer's body side when the diaper 10 is worn by the contraction 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. It is fixed to the covering sheet 36 (or the leak-proof sheet 37 when the leak-proof sheet 37 is arranged) via the joining areas 70 and 71 formed from the 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 base side edge 50 of the second absorption part 42, and the front and rear end joints 71A and 71B located on the front and rear end edges of the liquid absorbing structure 35, and the front and rear end joints And an intermediate joint 71C located between 71A and 17B. 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.

  Speaking of 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 horizontal direction X is about 200 to 300 mm. Moreover, the width dimension W2 of the liquid absorption structure 35 is about 250 to 350 mm, the separation dimension W5 between the free side edges of the pair of second absorbing portions 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 contacting each other in the wearing state, the correlation in each dimension needs to be (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 free side edges of the pair of second absorption parts is obtained by multiplying by 2 the value obtained by subtracting the lateral dimension of the central joint area from the lateral dimension X of the liquid absorbing structure. It is larger than the value. 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 liquid absorbing structure 35 is provided in the non-side non-joining region 74. Even if the portion is bent, there is no possibility that the free edge portions 51 of the second absorbent portion 42 contact each other or overlap each other. 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 bonding area 70, while the entire opposite surface of the liquid absorbing structure 35 is covered with a hot melt adhesive. Since it is not fixed to the sheet 36, the absorbent chassis 11 has overall flexibility as compared with a case where the entirety is fixed to the covering sheet 36 via a hot melt adhesive. Moreover, since the side joining area | region 71 is located in the lower surface of the base side edge part 50 of the 2nd absorption part 42, when wearing the diaper 10 as above-mentioned, the 2nd absorption part 42 makes the base side edge part 50 a part. It can stand up toward the wearer's body as a starting point.

  Referring to FIGS. 7 and 8, when the diaper 10 is worn, the second absorbent portion 42 stands up toward the wearer's body 17 side by the contraction force of the side elastic body 38. Normally, when a solid cuff or the like is erected by the contraction force of an elastic body, only the free side edge where the rubber is arranged contacts the wearer's body and the entire solid cuff fits the wearer's body in a planar shape. It becomes difficult to do. 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 free side edge 51 but the entire contact surface 59A abuts the wearer's thigh substantially in a planar shape. Therefore, compared with the case where only the free side edge portion 51 is in contact with the wearer's body, the contact area with the body is large, the fit is excellent, and the bodily 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 wearer's crotch so that the second absorbent portions 42 come in contact with each other, and their free side edges There is a possibility that 51 may enter 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 portion 42 cannot enter the wearer's groin and the fit is reduced, and the liquid absorbing structure 35 cannot cover the entire wearer's buttocks 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 positioned on the front and rear waist regions 13 and 14 side, the side non-joining region 74 is positioned and the base edge portion 50 of the second absorbent portion 42 is not fixed to the covering sheet 36. The second absorbing portion 42 stands 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. Accordingly, the front end portion 30 is fitted and fitted between the wearer's inguinal portions, and the rear end portion 31 is entirely covered by the standing second absorbing 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 and 31, so that the standing state 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 absorption portion 42 free without being fixed to the covering sheet 36, and fits to the inguinal portion having a different shape and depth for each wearer. Can be made. Therefore, it is preferable that at least the width dimension W <b> 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, exceptionally, the front and rear end joint regions 71A and 71B are located on the edge sides of the front and rear end portions 30 and 31, respectively. 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 the compression-absorbing liquid-absorbent core 34 and has a required thickness and rigidity, for example, a three-dimensional cuff formed only from a sheet member having elasticity in a conventional diaper, etc. It is possible to suppress the formation of a gap that is more stably fitted to the wearer's body and causes leakage of bodily fluid between the body 17 and the second absorption part 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 2nd absorption part 42 entirely fits a wearer's body in planar shape, it can be said that absorption efficiency is high compared with the case where only the part fits and absorbs a bodily fluid. In the present embodiment, since the entire surface of the second absorption part 42 has hydrophilicity, the excreted body fluid is first applied to the skin-opposing surface of the first absorption part 41 and the second absorption part 42. It penetrates 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 hydrophilic but may be hydrophobic or liquid impervious. 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 barrier cuff 64 of the covering sheet 36 stands up toward the wearer's body by the contraction force of the cuff elastic body 63 outside the second absorbent portion 42. The width dimension W1 of the second absorption part 42 is larger than the width dimension of the barrier cuff 64. Specifically, in the crotch area 15, from the side edge of the crotch area 15 to the side edge of the free side edge part 51 of the second absorption part 42. The dimension in the horizontal direction X is larger than the dimension in the horizontal direction X from the side edge of the crotch region 15 to the free edge of the covering sheet 64. Therefore, in a state where the second absorbent portion 42 and the barrier cuff 64 are erected, the second absorbent portion 42 is higher than the barrier cuff 64 and fits more to the wearer's body. The barrier cuff 64 is liquid-impervious or water-repellent, moves to the contact surface 59A side of the second absorbent portion 42 through the wearer's body, and leaks body fluid that is not absorbed by the contact surface 59A. It functions as a leak-proof wall. In addition, the second absorbent portion 42 erected by the contracting action of the side elastic body 38 is easily sandwiched between the groin portions and tends to fall outward, but the barrier cuff 64 is positioned on the outer side, whereby the second absorbent portion 42. Is prevented from falling outside. That is, the barrier cuff 64 functions to form a double leak-proof wall together with the second absorption portion 42 and to assist the standing of the second absorption portion 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 absorbing portion 42 but also the barrier cuff 64 is 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 (natural state), FIG. 9B. As a comparative example, in the second absorbent portion 42, the side elastic body 38 is attached only to the free side edge portion 51, and is cut out from the diaper so that the side elastic body 38 is contracted. FIG. Referring to FIG. 9A, the second absorbent portion 42 cut out from the diaper 10 is arranged with the side elastic bodies 38 being evenly spaced from the base side edge portion 50 to the free side edge 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 stood up in the natural state cut out from the diaper 10 by the shrinkage | contraction dimension of the free side edge part 51 and the base side edge part 50 substantially the same as the whole. It becomes an aspect. Furthermore, in a 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 free side edge 51 of the second absorbent portion 42, the contraction amount of the free side edge 51. Is larger than that of the base side edge 50, and the shrinkage dimensions of the base side edge 50 and the free side edge 51 are different from each other. Therefore, the second absorbent portion 42 has a peripheral wall as shown in FIG. Instead of a three-dimensional shape that forms a flat ring shape. As is apparent from the configuration of the second absorbent portion 42 shown in FIGS. 9A and 9B in the natural state, in order to realize the standing and planar fit of the second absorbent portion 42, the side portion The number of the side elastic bodies 38 (pitch), the fineness, the expansion ratio, etc. so that the 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 these conditions.

<Modification 1>
Referring to FIGS. 10A, 10 </ b> 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 likely to contract in the longitudinal direction Y is formed, and the uprightness and surface fit 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 includes a base side edge 50 fixed via a fixing part 82 and a free side edge 51 positioned inside the base side edge 50 in the lateral direction X. Also in this embodiment, the contact surface 59 </ b> A of the second absorbent portion 42 has hydrophilicity and stands up toward the wearer's body by the contraction force of the side elastic body 38.

  For each constituent material constituting the diaper 10 of the present invention, various known materials that are usually used in this kind 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 perpendicular thereto, a skin facing surface and a clothing facing surface, and is disposed in at least the crotch region, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions. In the disposable wearing article including the liquid absorbing structure provided with the liquid absorbing core, the liquid absorbing structure has a bonding area on the liquid-impermeable covering sheet that covers a bottom surface of the liquid absorbing core. The first absorption part positioned at least in the crotch region and spaced apart from each other in the lateral direction, and fixed on the skin facing surface of the first absorption part A pair of second absorption parts extending to the base, the second absorption part being a base side edge continuous with the first absorption part, and a free side extending in the longitudinal direction in parallel with the base side edge And the joining area is in the crotch area. That the lateral dimension greater than the transverse dimension of at least the front waist region of said front and rear waist regions.

The disposable wearing article according to the present invention disclosed in the above paragraph can include at least the following embodiments.
(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 free side edge side and a second area located on the second base edge side, which bisects the width dimension. In the wearing state, the longitudinal dimension in the contracted state of the first section is smaller than the longitudinal dimension in the contracted state of the second section, while the second absorbing portion is in the first absorbing state. When separated from the portion, the longitudinal dimension in the contracted state of the first section and the longitudinal dimension in the contracted state of the second section are substantially equal. (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 liquid-impervious leak-proof sheet positioned between the liquid-absorbing structure and the covering sheet.
(6) Cuff elastic members extending in the longitudinal direction are 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 spacing dimension between the free side edges of the pair of second absorption parts is a value obtained by subtracting the lateral dimension of the central joint area from the lateral dimension X of the liquid absorbing structure. It is larger than the value multiplied by 2.

DESCRIPTION OF SYMBOLS 10 Disposable wearing article 12 Waist panel 13 Front waist area 14 Rear waist area 15 Crotch area 18 Front waist panel 19 Rear waist panel 33 Body side liner 34 Absorbent core 35 Absorbent structure 36 Cover sheet 37 Leakproof sheet 38 Side part Elastic body 40 Bending line 41 1st absorption part 42 2nd absorption part 50 Base side edge 51 of 2nd absorption part Free side edge 61 of 2nd absorption part 1st area 62 2nd area 63 Cuff elastic body 70 Center Joining area 71 Side joining areas 71A, 71B Front / rear end joining part 71C Intermediate joining part 73 Central non-joining area 74 Side non-joining part 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 area transverse dimension between free side edges of the second absorbent part

Claims (10)

It has a longitudinal direction and a lateral direction perpendicular thereto, a skin facing surface and a clothing facing surface, and is disposed in at least the crotch region, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions. In a disposable wearing article comprising a liquid absorbing structure provided with a liquid absorbing core,
The liquid-absorbing structure is fixed to a liquid-impervious coating sheet that covers the bottom surface of the liquid-absorbent core via a bonding region, and includes at least a first absorbent portion located in the crotch region, A pair of second absorbent parts extending in the longitudinal direction, spaced apart from each other in the direction and fixed on the skin-facing surface of the first absorbent part,
The second absorption part has a base side edge part continuous with the first absorption part, and a free side edge part extending in the longitudinal direction in parallel with the base side edge 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 absorption portion.   The second absorption part has a first area located on the free side edge side and a second area located on the second base edge side, which bisects the width dimension, and is worn In the state, the longitudinal dimension in the contracted state of the first section is smaller than the longitudinal dimension in the contracted state of the second section, while the second absorbent part is separated from the first absorbent part. The wearable article according to any one of claims 1 to 3, wherein the longitudinal dimension in the contracted state of the first section is substantially equal to the longitudinal dimension in the contracted state of the second section.   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 a wearer's body has hydrophilicity.   The wearing article according to any one of claims 1 to 5, further comprising a liquid-impervious 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 cuff elastic member 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 absorbent 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 in any one of Claims 1-8 fixed to a waist panel.   The lateral dimension between the free side edges of the pair of second absorbent parts is a value obtained by subtracting the lateral dimension of the central joint area from the lateral dimension X of the liquid absorbing structure. The wearing article in any one of Claims 2-9 larger than the value which multiplied 2 by.