JP5932910B2 - Pants-type disposable diapers - Google Patents

Description

  The present invention relates to a pants-type disposable diaper.

As a conventional disposable diaper, an absorbent main body including a liquid-permeable surface sheet and a liquid-retaining absorbent, and the absorbent main body is fixed on the non-skin contact surface side of the absorbent main body A pant comprising an exterior body, wherein both sides of the exterior body in the front body and both sides of the exterior body in the back body are joined to form a pair of side seal parts, a waist opening, and a pair of leg openings Type disposable diapers are known.
In addition, in order to improve the leak-proof performance of such disposable diapers, a leak-proof cuff that is raised by an elastic member is provided on both sides in the longitudinal direction of the absorbent main body at the crotch, and the non-skin contact of the side part of the absorbent body It is also known to form a gap capable of storing urine and the like between a sheet covering the contact surface side and a leak-proof cuff (see Patent Document 1).

  On the other hand, it is also known to use a sheet having a concavo-convex shape as a surface sheet of a disposable diaper or a sanitary napkin in order to suppress wetback and improve the wearing feeling. It is described that an uneven sheet having a configuration in which a formed sheet and a lower layer sheet not shaped into an uneven shape are joined to each other in a recess of the upper layer sheet are used as a surface sheet of a deployable disposable diaper. .

JP 2007-029482 A JP 2009-148445 A

  However, the pants-type disposable diaper of Patent Document 1 has a structure that hardly absorbs liquid from the non-skin contact surface side of the side of the absorber, and there is room for improvement from the viewpoint of improvement in wearing feeling and absorption performance. there were.

  The present invention relates to a pants-type disposable diaper that can solve the problems of the prior art.

  The present invention comprises an absorbent main body comprising a liquid-permeable topsheet and a liquid-retaining absorbent body, comprising an abdominal side portion, a back side portion and a crotch portion, forming a waist opening portion and a pair of leg openings. The pants-type disposable diaper, wherein the top sheet is formed on the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and non-skin contact surfaces on both longitudinal sides of the absorbent body A pair of leak-proof cuffs are provided on both sides in the longitudinal direction of the absorbent main body, and the leak-proof cuffs are respectively provided on the abdominal side portion and the back side portion. It is arranged so as to extend from the non-skin contact surface side of the main body to the skin contact surface side of the absorbent main body, and is configured to stand up at the crotch portion in the wearing state, and the absorbent main body In the part spaced apart from both side edges of the body in the width direction of the absorbent body, It has a fixing part for the member on the skin contact surface side, and the top sheet has an uneven region in which convex portions are formed in a dotted shape at a portion covering the skin contact surface side of the absorber. The present invention provides a pants-type disposable diaper in which the portions covering the non-skin contact surface side on both sides in the longitudinal direction of the absorbent body are non-relief regions having no unevenness.

  The pants-type disposable diaper of the present invention is excellent in the touch of the liquid-absorbing surface that comes into contact with the skin and in preventing liquid return, and also in the absorption performance and leak-proofing in the crotch.

FIG. 1 is a perspective view of a pants-type disposable diaper that is an embodiment of the present invention. FIG. 2 is a developed plan view showing a state in which the developed and extended state of the diaper shown in FIG. 1 is viewed from the skin contact surface side. The expanded and extended state is a state in which the side seal portion separates and expands, and the elastic member of each portion is extended and expanded in a planar shape. FIG. 3 is a cross-sectional view schematically showing a cross section taken along the center line CL in the width direction of the diaper shown in FIG. 1 in a worn state. 4 is a cross-sectional view schematically showing a cross section taken along line II of FIG. FIG. 5 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. FIG. 6 is a perspective view showing an uneven area of the top sheet of the diaper shown in FIG. FIG. 7 is an explanatory diagram of a method for manufacturing the top sheet of the diaper shown in FIG. Fig.8 (a)-FIG.8 (c) are model enlarged plan views which show the other example of the uneven | corrugated area | region where the convex part is formed in the shape of a dot in a surface sheet. Fig.9 (a)-FIG.9 (d) are explanatory drawings of the surface sheet which can be used for this invention, FIG.9 (a) is the surface sheet used for the diaper shown in FIG. 1, FIG.9 (b)- FIG.9 (d) is sectional drawing which shows the other example of the surface sheet employable as a surface sheet. FIG. 10: is a principal part expanded sectional view along the width direction of the crotch part which shows the principal part of the underpants type disposable diaper which is other embodiment of this invention. 11 (a) and 11 (b) are explanatory views (main part enlarged sectional views along the width direction of the crotch part) for explaining a more preferable configuration of the pants-type disposable diaper shown in FIG.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
A pants-type disposable diaper 1 (hereinafter also referred to as “diaper 1”) according to an embodiment of the present invention includes an absorbent main body 5 and a non-skin contact between the absorbent main body 5 as shown in FIGS. And an exterior body 10 which is located on the surface side and fixes the absorbent main body 5. Moreover, as shown in FIG. 2, the diaper 1 has the longitudinal direction X equivalent to a wearer's front-back direction, and the width direction Y orthogonal to this, and is distribute | arranged to a wearer's stomach side at the time of wear. Abdominal side A, a back side B arranged on the back side of the wearer, and a crotch C located between the abdominal side A and the back side B and arranged in the crotch part of the wearer have. And side edge part A1, A1 of the exterior body 10 in the ventral part A and side edge part B1, B1 of the exterior body 10 in the back side part B are mutually connected by well-known joining means, such as a heat seal and an ultrasonic seal. A pair of side seal portions S, S, a waist opening 7 and a pair of leg openings 8, 8 are formed by joining. The outer package 10 of the diaper 1 forms the outer surface of the diaper 1.

The ventral portion A, the dorsal portion B, and the crotch portion C are regions when the diaper 1 in the expanded and extended state (see FIG. 2) is divided into three regions so that the entire length in the longitudinal direction X is divided into three equal parts. It is. In the expanded and extended state, the side seal part is peeled off, the diaper is set in the expanded state, the expanded state diaper is extended by the elastic member of each part, and the design dimensions (the state in which the influence of the elastic member is completely eliminated) It is the same as when it is spread in a flat shape. The center line CL in the width direction of the diaper 1 is a virtual straight line extending in the width direction Y by dividing the entire length of the diaper 1 in the longitudinal direction into two equal parts.
Further, in the present specification, the skin contact surface is a surface directed to the wearer's skin side when worn in a pants-type disposable diaper or a constituent member thereof (for example, an absorbent main body), and the non-skin contact surface is In the pants-type disposable diaper or its constituent members, it is a surface directed to the side opposite to the wearer's skin side (clothing side) when worn.

  The absorbent main body 5 has a vertically long shape in the longitudinal direction X of the diaper 1 as shown in FIG. 2, and as shown in FIGS. Sex absorber 4 is provided. The absorbent main body 5 is joined to the central portion of the outer package 10 by a known joining means (adhesive or the like) so that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1 in the unfolded and extended state. The absorbent body 4 has a shape that is long in the longitudinal direction X of the diaper 1, similarly to the absorbent main body 5.

  As shown in FIGS. 2 and 3, the absorbent body 4 in the diaper 1 includes an absorbent core 40, and a core wrap sheet 41 that covers the skin contact surface side and the non-skin contact surface side of the absorbent core 40. The absorbent core 40 includes a rectangular lower absorbent core 412 and an upper absorbent core 411 stacked on a part of the lower absorbent core 412. The absorptive core 40 has a central region 42 that is relatively thick due to the upper absorbent core 411 being laminated on the lower absorbent core 412 at the center in the width direction of the crotch C, The upper absorbent core 411 is not laminated on the lower absorbent core 412 on both sides of the central region 42 and has a pair of side regions 43 and 43 that are thinner than the central region 42. And it has the level | step difference d in the skin contact surface side of the absorber 4 in the boundary part of the center area | region 42 and each of the side area | regions 43 and 43. FIG.

In the absorbent body 4 in the diaper 1, the upper absorbent core 411 and the lower absorbent core 412 are both made of a fiber assembly or a structure in which a water absorbent polymer is held. The core wrap sheet 41 is made of tissue paper or a water-permeable nonwoven fabric, and covers the entire absorbent core 40.
Further, the lower absorbent core 412 has separation portions 44 and 44 penetrating the lower absorbent core 412 on both sides of the crotch portion C where the upper absorbent core 411 is overlapped. Moreover, in those separation parts 44 and 44, as shown in FIG. 3, the core wrap sheet | seat 41 which covers the skin contact surface side of the absorptive core 40, and the non-skin contact surface side of the absorptive core 40 are provided. The core wrap sheet 41 to be coated is joined to each other by a known joining means such as an adhesive 46.

As shown in FIGS. 3 to 5, the surface sheet 2 in the diaper 1 has a concavo-convex region 2 a in which convex portions 21 are formed in a dotted shape at a portion arranged in the central portion in the width direction of the absorbent main body 5. In addition, flat non-relief areas 2b and 2b having no unevenness are provided on both sides of the uneven area 2a. The topsheet 2 has a rectangular shape and has a length over the entire length of the absorbent main body 5 in the longitudinal direction. The uneven region 2a is formed at the center in the width direction of the topsheet 2, and non-recessed regions 2b and 2b are formed on both sides thereof. The uneven region 2a and the pair of non-recessed regions 2b, 2b both have a rectangular shape and are formed so as to cover the entire length of the topsheet 2.
Here, with respect to the uneven region, the convex portions are formed in the form of dots, and a plurality of convex portions are provided in each of an arbitrary direction and a crossing direction (preferably an orthogonal direction) in the plan view of the topsheet. It means that it is arrange | positioned in the state which has a recessed part between convex parts. The arbitrary direction is preferably the same as the longitudinal direction X of the diaper. As shown in FIG. 6, the topsheet 2 in the present embodiment is arranged in a state in which a plurality of convex portions 21 have concave portions 22 a between the convex portions in one direction corresponding to the longitudinal direction X of the diaper 1. At the same time, a plurality of convex portions 21 are also arranged in the cross direction corresponding to the width direction Y of the diaper 1 so as to have the concave portions 22a between the convex portions. FIG. 8A to FIG. 8C show other examples of the uneven region 2a in which the convex portions are formed in a dotted shape. The concave portion between the convex portions 21 and 21 is not limited to the one surrounded by the convex portion over the entire circumference, and is convex as in the concave portion 22b shown in FIGS. 8 (a) to 8 (c). The concave portion between the portions 21 and 21 may be continuously formed between all the convex portions.

As shown in FIG. 6, the uneven region 2 a in the surface sheet 2 is formed by joining the upper layer sheet 22 shaped into a concavo-convex shape and the lower layer sheet 23 not shaped into a concavo-convex shape in the concave portion 22 a of the upper layer sheet 22. It has the structure which was made. Regarding the lower layer sheet 23, the meaning that it is not shaped into a concavo-convex shape means that the lower layer sheet itself has not been processed to give irregularities, and as a result of being bonded to the concavo-convex shaped upper layer sheet 22, A case where some undulations are generated in the lower layer sheet 23 also corresponds to “not shaped in an uneven shape”.
The convex portion 21 is formed in a staggered pattern on the upper layer sheet 22 in the present embodiment. More specifically, the convex portions 21 and the concave portions 22a are arranged alternately and in a row in the diaper longitudinal direction X, and such rows are formed in multiple rows in the diaper width direction Y. . In adjacent rows in the diaper width direction Y, the positions of the convex portions 21 are shifted by a half pitch in the diaper longitudinal direction X. Therefore, when attention is paid to any one concave portion 22a in one row, the single concave portion 22a is a closed concave portion formed by being surrounded by the convex portions 21 in the front and rear and the left and right. In the topsheet 2 of the present embodiment, the concave portions 22a are also arranged in a staggered manner, like the convex portions 21.

  The upper layer sheet 22 is joined to the lower layer sheet 23 in the whole or part of the recess 22a. As a form in which the upper layer sheet 22 is joined to the lower layer sheet 23 in a part of the recess 22a, the upper layer sheet 22 is at one or a plurality of locations (for example, two, three, or four or more locations) in the recess 22a. The form joined with the lower layer sheet | seat 23 is mentioned. For example, the upper layer sheet 22 may be joined to the lower layer sheet 23 at the four corners of the concave portion 22a having a rectangular shape in plan view. Further, the convex portion 21 is hollow inside.

The uneven | corrugated | grooved area | region 2a has the following structures from a viewpoint etc. which improve touch and improve cushioning properties, or a viewpoint which suppresses that the liquid which transferred to the absorber 4 returns (wet back) to the surface which touches skin. It is preferable to have.
The convex portion 21 has a height T1 (see FIG. 6) of preferably 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5 mm or less, more preferably 3 mm or less, more specifically. Is preferably 0.1 mm to 5 mm, more preferably 0.2 mm to 3 mm.
Further, the thickness T2 (see FIG. 6) of the surface sheet 2 at the portion having the convex portion 21 is preferably 0.2 mm or more, more preferably 0.5 mm or more, and preferably 6 mm or less, more preferably 4 mm or less. More specifically, it is preferably 0.2 mm or more and 6 mm or less, more preferably 0.5 mm or more and 4 mm or less.
The number 20-200 amino protrusion 21 of area 10 cm ² per shaped regions 2a, and particularly preferably 50 to 150 pieces.

  Moreover, it is preferable that the bottom part dimension E (refer FIG. 6) of the diaper longitudinal direction X of the convex part 21 is 1.0-10 mm, especially 2.0-7.0 mm. The bottom dimension F (see FIG. 6) of the convex portion 21 in the diaper width direction Y is preferably 0.5 to 5.0 mm, particularly preferably 1.0 to 4.0 mm. The recess 22a preferably has a dimension G (see FIG. 6) in the diaper longitudinal direction X of 0.2 to 5.0 mm, particularly 0.5 to 3.0 mm, and a dimension H in the diaper width direction Y (see FIG. 6). ) Is 0.1 to 2 mm, particularly preferably 0.2 to 1.0 mm.

  As the sheet material constituting the upper layer and lower layer sheets 22 and 23, various known sheet materials can be used as a material for forming a surface sheet of an absorbent article such as a disposable diaper or a sanitary napkin. It is preferable that it is a nonwoven fabric from a viewpoint of improvement and the touch. As the nonwoven fabric, an air-through nonwoven fabric in which fibers are fused with each other by the air-through method on a fiber web obtained by the card method or the airlaid method, and a heat-fusion point between the fibers by a heat roll method on the fiber web obtained by the card method. Heat roll nonwoven fabric, heat embossed nonwoven fabric, spunbond nonwoven fabric (S), meltblown nonwoven fabric (M), spunbond-meltblown composite nonwoven fabric (SM, SMS, SMMS, etc.), spunlace nonwoven fabric, needle punched nonwoven fabric, airlaid nonwoven fabric, Various nonwoven fabrics such as a resin bonded nonwoven fabric can be used.

  As the constituent fibers of the nonwoven fabric, heat-fusible fibers, particularly fibers made of thermoplastic polymer materials are preferably used. Examples of the thermoplastic polymer material include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides. A core-sheath type composite fiber or a side-by-side type composite fiber made of a combination of these thermoplastic polymer materials can also be suitably used. The non-woven fabric may contain, as constituent fibers, fibers other than the heat-fusible fibers (for example, cotton fibers) that do not have heat-fusibility.

  The nonwoven fabric constituting the upper layer sheet 22 (sheet material for forming the convex portion) is preferably 0.1 to 5.0 dtex, more preferably a fineness of the constituent fiber from the viewpoint of forming the convex portion 21 that is soft and cushioning. Is a fineness of 0.1 to 3.3 dtex. From the same viewpoint, it is preferable that the nonwoven fabric (sheet material forming the convex portion) constituting the upper layer sheet 22 includes crimped fibers.

As shown in FIG. 9A, the non-concave area 2b in the surface sheet 2 is composed only of the lower layer sheet 23 extending from the uneven area 2a. The basis weight of the lower layer sheet 23 is preferably from the viewpoint of ensuring the flexibility of the non-concave region 2b to the non-skin contact surface side of the absorbent body 4 and the side of the absorbent main body 5. Is 5 to 50 g / m ² , more preferably 10 to 30 g / m ² . From the same viewpoint, the fineness of the constituent fibers in the case where the lower layer sheet 23 is composed of a nonwoven fabric is preferably 1 to 20 dtex, more preferably 1.5 to 6 dtex. On the other hand, the basis weight of the topsheet 2 in the uneven region 2a is preferably 10 to 100 g / m ² , more preferably 10 to 30 g / m ² .

The surface sheet 2 used for the diaper 1 is wider than the upper layer sheet 22 as the belt-like lower layer sheet 23, except that a sheet having non-concave regions 2b and 2b on both sides in the longitudinal direction can be obtained. The surface sheet for absorbent articles described in JP 2004-174234 A can be manufactured in the same manner as the method for manufacturing a composite sheet described in JP 2008-106420 A.
That is, first, as shown in FIG. 7, the belt-like upper layer sheet 22 is fed out from the roll-like roll 22 ′ of the upper-layer sheet 22, and the belt-like roll-like roll 23 ′ of the lower layer sheet 23, which is different from this. The lower layer sheet 23 is fed out. The rolled upper layer sheet 22 includes a first roll 211 having a concavo-convex shape on the peripheral surface, and a second roll having a concavo-convex shape meshing with the concavo-convex shape of the first roll 211 on the peripheral surface. The upper sheet 22 is unevenly shaped by being engaged with the roll 212 and the engagement portion. Then, the upper layer sheet 22 that has been formed with irregularities is held in a state where the irregularities are formed on the peripheral surface of the first roll 211 by suction, while the lower layer sheet 23 that is wider than the upper layer sheet 22 is held on the upper layer sheet 22. And the lower layer sheet 23 is joined to the upper layer sheet 22 located on the convex portion of the first roll 211 only within the width of the upper layer sheet 22. Thereby, the belt-like topsheet 2 having the uneven region 2a at the center in the width direction and the non-recessed regions 2b, 2b consisting only of the lower layer sheet 23 extending from the uneven region 2a on both sides thereof is obtained. The belt-like topsheet 2 is introduced into the production line of the diaper 1 after being wound up, or is introduced into the production line of the diaper 1 without being wound up.

  It is preferable that both the upper layer sheet 22 and the lower layer sheet 23 are substantially non-stretchable. By using the non-stretchable sheet material, when forming the uneven shape of a desired size, the upper layer sheet 22 can be formed with the unevenness substantially conforming to the uneven shape of the first and second rolls described above. In addition, irregularities having a desired shape can be stably and reproducibly formed in the irregular region 2a of the top sheet 2. The substantially non-stretchable sheet-like material means, for example, an elongation limit of 105% or less, and material elongation or permanent deformation occurs when the elongation limit is exceeded.

  In the manufacturing method shown in FIG. 7, the upper layer sheet 22 and the lower layer sheet 23 are partially heated and pressurized between the convex portion of the first roll 211 and the heat roll 213, so that the concave portion 22 a of the upper layer sheet 22 is formed. Bonded to the lower sheet 23. In addition, the point which is not demonstrated in particular about the manufacturing direction of the surface sheet 2 is the same as that of the manufacturing method of the surface sheet described in Unexamined-Japanese-Patent No. 2004-174234 and the manufacturing method of the composite sheet described in Unexamined-Japanese-Patent No. 2008-106420. It can be.

  As shown in FIGS. 3 to 5, the surface sheet 2 in the diaper 1 is formed on the skin contact surface side of the absorbent body 4, both side edges 4 e and 4 e in the longitudinal direction of the absorbent body 4, and the longitudinal direction of the absorbent body 4. It arrange | positions so that the non-skin contact surface side in both sides 4s and 4s may be covered, and has the uneven | corrugated area | region 2a mentioned above in the part which covers the skin contact surface side of the absorber 4. FIG. On the other hand, the portions 4r and 4r covering the non-skin contact surface side in the longitudinal side portions 4s and 4s of the absorbent body 4 are flat non-relief regions 2b having no unevenness.

  In more detail, the uneven | corrugated | grooved area | region 2a of the surface sheet 2 is formed at least on the center part of the width direction of the absorber 4, Preferably, preferably the leak-proof cuffs 6 and 6 in the ventral part A or the dorsal part B The width between the upper edge portions 6a and 6a is preferably 50% or more, more preferably 100% or more. In addition, the pair of non-concave regions 2b of the top sheet 2 are respectively wound down to the non-skin contact surface side of the absorbent body 4, and form non-skin contact surfaces on both sides in the longitudinal direction of the absorbent main body 5. doing. Further, in the topsheet 2, the part located on the non-skin contact surface side of the absorbent body 4 is separated from the longitudinal side edges 4 e of the absorbent body 4 inward in the width direction of the absorbent body 4 (in the width direction central portion direction). The fixing part 67 formed at the above-mentioned part is fixed to the leak-proof cuff 6. A part of the leak-proof cuff 6 is located on the non-skin contact surface side of the absorbent main body 5 in any of the abdominal side A, the back side B, and the crotch C, and the absorbent main body 5 is the end of the portion of the topsheet 2 that is wound down to the non-skin contact surface side of the absorbent body 4 on the leak-proof cuff 6 (member on the non-skin contact surface side) located on the non-skin contact surface side. The part vicinity 2e is joined, and this joined part serves as a fixing part 67 for the non-skin contact surface side member (leak-proof cuff 6) of the absorbent main body 5 in the present embodiment. That is, as shown in FIG. 3, the fixing portion 67 is formed at a portion that is separated from the longitudinal side edges 4 e of the absorber 4 inward in the width direction of the absorber 4 (in the width direction central portion direction). For this joining, a known joining method such as heat sealing, ultrasonic sealing, or a hot-melt adhesive can be used. In the width direction Y of the crotch part C, the distance from the side edge 4e of the absorbent body 4 to the fixing portion 67 is preferably 1 cm or more, more preferably 2 cm or more.

  As shown in FIGS. 2 to 5, the leak-proof cuff 6 is formed on both sides in the longitudinal direction of the absorbent main body 5 so as to extend in the longitudinal direction X of the diaper. The leak-proof cuff 6 includes a leak-proof cuff forming sheet 60, an elastic member 61 for erecting the leak-proof cuff fixed in the vicinity of the upper edge 6 a of the leak-proof cuff 6, and the leak-proof cuff 6. An intermediate elastic member 62 fixed to the intermediate portion between the upper edge 6a and the upright base end 6b in an extended state is provided. In the crotch part C, the upper edge 6a forms a free end of the leak-proof cuff 6 that rises toward the wearer's skin.

Further, as shown in FIGS. 4 and 5, the leak-proof cuff 6 has a skin contact of the absorbent main body 5 from the non-skin contact surface side of the absorbent main body 5 in the abdominal side A and the back side B. The part located on the non-skin contact surface side of the absorbent main body 5 is fixed to the absorbent main body 5 at the fixing portion 67 described above, and the skin contact of the absorbent main body 5 is arranged over the surface side. The portion located on the surface side is fixed to the surface sheet 2 forming the skin contact surface side of the absorbent main body 5 by known joining means such as adhesives 68 and 69.
On the other hand, in the crotch part C in the worn state, as shown in FIG. 3, the leak-proof cuff 6 rises toward the wearer's skin side as the elastic member 61 contracts. Also in the crotch portion C, the leak-proof cuff 6 extends from the non-skin contact surface side of the absorbent main body 5 to the skin contact surface side of the absorbent main body 5 in the expanded and extended state as shown in FIG. The portion located on the non-skin contact surface side of the absorbent main body 5 is fixed to the absorbent main body 5 by the fixing portion 67 described above.

The leak-proof cuff 6 is fixed in a state extending from the non-skin contact surface side to the skin contact surface side of the absorbent main body 5 in the abdominal side portion A and back side portion B, thereby preventing the crotch portion C from being protected. The leakage cuff 6 can easily stand in a state where the upper portion in the height direction is inclined inward, and the leakage prevention effect by the leakage prevention cuff 6 is improved. Further, the presence of the intermediate elastic member 62 makes it easier for the liquid P such as urine to flow into the gap between the non-skin contact surface side on both sides of the absorbent main body 5 and the leak-proof cuff 6.
In the diaper 1, a sheet-like water-repellent sheet having a predetermined width is folded as a leakage-proof cuff forming sheet 60 by a fold line along its longitudinal direction, and the opposite layers are hot-melt bonded. uses a sheet of material or partial heat sealing or two-layer structure joined by ultrasonic sealing or the like, the elastic members 61 for the leak-barrier cuffs upright is fixed in a stretched state between the layers of the sheet of the two-layer structure ing.

  On the skin contact surface side of the outer package 10 in the diaper 1, a liquid-impervious leak-proof sheet 3 and a leak-proof cuff forming sheet made of a resin film are made of an adhesive such as a hot-melt adhesive. 60 and the absorptive main body 5 are joined sequentially. With respect to the leak-proof sheet 3, the liquid impermeability is a concept including liquid impermeability.

  As shown in FIGS. 3 to 5, the outer package 10 in the diaper 1 of the present embodiment includes two outer package forming sheets 11 and 12 and each portion fixed in an extended state between the two sheets. It consists of an elastic member. That is, between the two exterior body forming sheets 11, 12, a waist elastic member 71 that forms a waist gather at the periphery of the waist opening 7, and a leg that forms a leg gather at the periphery of the leg opening 8 Waist elastic that forms a waistline gather in a state where it is divided into left and right elastic parts 81 and waistline D (region from the position 20 mm downward from the peripheral edge of waist opening 7 to the upper end of leg opening 8) The members 91 are bonded and fixed by an arbitrary bonding means such as a hot-melt adhesive in an extended state. The exterior body forming sheets 11, 12 are folded at one or both of the two sheets at the peripheral edge of the waist opening 7, and the folded portions are at the front and rear ends of the absorbent main body 5. It is fixed to the skin contact surface side of the absorbent main body 5.

According to the diaper 1 of the present embodiment, the topsheet 2 has the uneven region 2a in which the convex portions are formed in the form of scattered dots in the portion covering the skin contact surface side of the absorbent body 4, so that it contacts the skin. The liquid absorbing surface to be touched is good, and the liquid transferred from the top sheet 2 to the absorbent body 4 does not easily return to the surface in contact with the skin, and is excellent in liquid return prevention.
Moreover, according to the diaper 1 of the present embodiment, the urine is provided between the non-skin contact surface side and the leak-proof cuff 6 on both sides of the absorbent main body 5 while having the leak-proof cuff 6 rising at the crotch C. A gap S through which the liquid P such as the same flows is formed. Moreover, since the leak-proof sheet 3 is not arranged on the non-skin contact surface side of the absorbent body 4 on both sides of the absorbent main body 5, the absorbent body 4 is from the non-skin contact surface side on both sides in the longitudinal direction. Can also absorb liquid.
Moreover, since the surface sheet 2 has a flat non-recessed region 2b that does not have unevenness on the skin contact surface side on both sides in the longitudinal direction of the absorbent body 4, the same part is the uneven region 2a. Compared to the case, the drawability of the liquid into the absorbent body 4 via the top sheet 2 is also good, and the liquid flowing into the gap S is also smoothly absorbed.
Thus, the diaper 1 of this embodiment is excellent in the absorption performance and leak-proof property in the crotch part C in addition to the touch of the liquid absorption surface which contacts a skin, and liquid return prevention property.

From the viewpoint of improving the drawability of the liquid from the gap S side, the thickness of the topsheet 2 in the non-recessed region 2b is preferably 60% or less, more preferably 25% or less of the thickness T2 in the uneven region 2a. . The thickness here is an apparent thickness and is measured by the following method.
[Measurement method of apparent thickness]
A non-contact type laser displacement meter (Laser head LK-G30, displacement meter LK-GD500 (trade name)) manufactured by Keyence Corporation was used. A measurement site was cut out and used as a measurement sample. A plate adjusted to apply a load of 0.05 kPa (0.5 g / cm ² ) was placed on the measurement sample, and the measurement was performed with the laser displacement meter. Three samples were measured, and the average value was set as the apparent thickness.

  Further, from the same viewpoint, the absorption performance between the absorbent core 40 and the core wrap sheet 41 and between the absorbent body 4 and the non-concave region 2b of the top sheet 2 on both sides of the absorbent main body 5 is the absorption performance. In order not to inhibit, it is preferable that the material is not bonded or is partially bonded by a pattern-coated adhesive. Examples of the pattern coating pattern include a dotted pattern, a spiral pattern, an omega-shaped pattern, and a narrow stripe pattern.

Moreover, in the diaper 1 of this embodiment, as shown in FIG. 3, the side elastic member 45 for raising the side part 4S of the absorber 4 is provided in the vicinity of both side edges 4e in the longitudinal direction of the absorber 4. It is arranged. The side elastic member 45 is arranged between the absorbent body 4 and the top sheet 2 in a state of extending in the diaper longitudinal direction X, and one or both of the absorbent body 4 and the top sheet 2 are made of an adhesive or the like. It is fixed by a known fixing method.
As shown in FIG. 3, the top sheet 2 in the diaper 1 of the present embodiment is also the above-described non-relief region 2 b from the side edge 4 e on the skin contact surface side of the absorbent body 4, as described above. The range from the part covering the non-skin contact surface side of the absorber 4 to the part of the part covering the skin contact surface side of the absorber 4 including the part where the partial elastic member 45 is fixed or close is non- It becomes the uneven | corrugated area | region 2b.
Therefore, compared with the case where the portion where the side elastic member 45 is fixed or close is the concavo-convex region 2a, the contraction of the side elastic member 45 is less likely to be prevented, and the side 4S of the absorber 4 can be raised. Are better. Therefore, the ability to capture the liquid S in the gap S between the non-skin contact surface side of both sides of the absorbent main body 5 and the leak-proof cuff 6 is further excellent, and the liquid leakage prevention property is further excellent. Become.
The non-concave region 2b on the skin contact surface side of the absorber 4 has a width from the side edge 4e of the absorber 4 to the uneven region 2a of preferably 5 mm or more, more preferably 10 mm or more. 1/3 or less of the full width of the body 4 is preferable.

Moreover, in the diaper 1 of this embodiment, as above-mentioned, the absorber 4 has the level | step difference d between the center area | region 42 and the side part areas 43 and 43, as shown in FIG. In the surface sheet 2, the uneven region 2 a covers the step d portion of the absorber 4.
The uneven region 2a is not easily deformed flexibly by having the convex portions 21 in the form of dots, and large wrinkles extending continuously in one direction are not easily generated, and the adhesion to the absorber 4 is easily maintained. Therefore, it is difficult to form a gap between the absorber 4 and the top sheet 21 at the step d.

  The uneven region of the surface sheet in the present invention may be composed of only one sheet shaped into a concavo-convex shape, but as in the present embodiment, an upper layer sheet shaped into a concavo-convex shape, Having a structure in which the lower layer sheet not shaped in the uneven shape is joined to each other in the concave portion of the upper layer sheet improves the cushioning property and the shape stability of the uneven shape, and the touch and the liquid return preventing property are maintained. From the same viewpoint, it is more preferable that the protrusions in the uneven region are arranged in a staggered manner in a plan view.

  As a material which comprises each part of the diaper 1 of this embodiment, what is normally used in the said technical field can be especially used without a restriction | limiting. For example, as the leak-proof sheet 3, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used. As the water-repellent material, a water-repellent nonwoven fabric or the like can be used.

  As the upper absorbent core 411 and the lower absorbent core 412, a fiber aggregate or a fiber aggregate and a water absorbent polymer (mixed product of a water absorbent polymer and a fiber material) or the like can be used. Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid. Examples of fibers constituting the absorbent core include hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide. it can. The water-absorbing polymer and the fiber can be used alone or in combination of two or more.

As a sheet material used for the sheet for forming a leak-proof cuff, a single layer or multilayer water-repellent nonwoven fabric, a laminate material of a resin film and a nonwoven fabric, or the like can be used. From the viewpoint of flexibility, water resistance, etc., a nonwoven fabric having a multilayer structure consisting of spunbond and meltblown, such as SM (spunbond-meltblown) nonwoven fabric, SMS (spunbond-meltblown-spunbond) nonwoven fabric, is preferable, and the basis weight is About 12 g / m ² is preferable. As in the diaper 1, these sheet materials may be used as two layers, or only a part of the portion where the elastic member 61 is disposed may be used as a two-layer structure.

  As a forming material of the elastic members 61, 62, 71, 81, 91, various known elastic materials used for absorbent articles such as disposable diapers and sanitary napkins can be used without particular limitation. Examples of the elastic material include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As the form of the elastic member, it is preferable to use a thread-like (thread rubber etc.) or string-like (flat rubber etc.) cross-section having a rectangular, square, round, polygonal cross section, or a multifilament type thread-like one. it can.

  As the exterior body forming sheets 11 and 12, various sheet materials conventionally used for this type of article can be used without particular limitation, but from the viewpoint of flexibility, a nonwoven fabric is preferable. It is preferably a single-layer nonwoven fabric or a laminated nonwoven fabric of two or more layers composed of an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, or the like. Moreover, the sheet | seat which integrated these nonwoven fabrics and films may be sufficient.

The principal part of the disposable diaper which is other embodiment of this invention is shown by FIG.10 and FIG.11 (a).
In the pants-type disposable diaper shown in FIG. 10, the absorbent body 4 includes an absorbent core 40 and a core wrap sheet (not shown) that covers the absorbent core 40, and the absorbent core 40 includes the absorbent core. A separation portion 44 penetrating 40 is provided. Further, the topsheet 2 is arranged so that the concavo-convex area 2a overlaps with the separation part 44 and its adjacent parts 44n, 44m, and the concavo-convex area 2a of the topsheet 2 has a pitch P between the convex parts 21,21. However, it is larger than the thickness t4 of the absorber 4 in the portions 44n and 44m adjacent to the separation portion 44.
The adjacent portions 44n and 44m of the separation portion 44 are adjacent portions in the diaper width direction Y. For example, the distance from the side edge of the separation portion 44 is within 5 mm on both sides sandwiching the separation portion 44. is there. Similarly to the diaper 1, the separating portion 44 is also an upper absorbent core 411 in the absorbent core 40 including the lower absorbent core 412 and the upper absorbent core 411 stacked on the skin contact surface side of the lower absorbent core 412. And the lower absorbent core 412 is preferably formed in a portion formed by either one of them, and a cut portion 44 that penetrates the lower absorbent core 412 is formed on each side of the crotch portion C where the upper absorbent core 411 is overlapped. More preferably, it is formed. The point which is not demonstrated especially about the underpants type disposable diaper which shows the principal part in FIG. 10 can be made the same as that of the diaper 1 mentioned above.

When the thickness t4 of the absorber 4 in one or both of the adjacent parts 44n and 44m of the separation part 44 is made larger than the pitch P between the convex parts 21 and 21, the convex part 21 becomes the side edge of the separation part 44. The absorber 4 hits obliquely with respect to the corner and becomes a resistance against a force to bend at the position of the side edge of the separation portion 44, and excessive bending of the absorber 4 can be prevented. From such a viewpoint, the pitch P between the convex portions 21 and 21 is preferably a ratio (P / t4) to the thickness t4 of the absorber 4 in one or both of the portions 44n and 44m adjacent to the separation portion 44. .1 or more, more preferably 1.5 or more, and preferably 10 or less, more preferably 5 or less. The pitch P between the convex portions 21 and 21 is preferably 2 mm or more and 20 mm or less, more preferably 3 mm or more and 10 mm or less, and the thickness t4 of the absorber 4 is preferably 1 mm or more and 10 mm or less, more preferably It is 2 mm or more and 7 mm or less.
In addition, the pitch P between the convex parts 21 and 21 is the distance between the same site | parts (center position of a top part) of the convex part located nearest (refer FIG. 8, FIG. 10). The convex portions located closest to each other do not include the convex portions adjacent to each other in the longitudinal direction X of the diaper.
The pitch P between the convex portions 21 and 21 is measured in a state where the tension is not applied to the top sheet (natural state). Further, the thickness of the absorbent body 4 is measured by observing a cut surface along the width direction of the diaper in a state where no load is applied, and preferably a part having a distance from the side edge of the separation portion 44 of 2 mm or more and 10 mm or less. Measure the thickness. The absorbent body in which the absorbent core is covered with the core wrap sheet is measured including the core wrap sheet portion.

Moreover, in the diaper which has the same basic composition as the pants-type disposable diaper which shows the principal part in FIG. 10, the uneven | corrugated | grooved area | region 2a of the surface sheet 2 is a pitch between the convex parts 21 and 21, as shown to Fig.11 (a). It is preferable that P is ½ or more of the width W44 of the separation portion 44. FIG. 11B is a diagram illustrating a case where the pitch P between the convex portions 21 and 21 is less than ½ of the width W44 of the separating portion 44.
When the pitch P is equal to or greater than ½ of the width W44, the number of the folding lines K of the surface sheet 2 generated in the portion overlapping the separating portion 44 can be reduced. Therefore, the absorbent core 40 and the absorbent core 40 are included. Excessive bending of the absorber 4 can be prevented.
From such a viewpoint, the pitch P between the convex portions 21 and 21 is such that the ratio (P / W44) to the width W44 of the separation portion 44 is preferably 0.5 or more, more preferably 0.8 or more. , Preferably 1.5 or less, more preferably 1.2 or less. Further, the pitch P between the convex portions 21 and 21 is preferably 2 mm or more and 15 mm or less, more preferably 5 mm or more and 10 mm or less, and the width W44 of the separation portion 44 is preferably 2 mm or more and 20 mm or less, more preferably. Is 8 mm or more and 15 mm or less. When the width W44 of the separation part 44 is not uniform in the longitudinal direction of the diaper, the width of the widest part in the separation part 44 is set as the width W44 of the separation part 44.

As mentioned above, although this invention was demonstrated based on the preferable several embodiment, this invention is not restrict | limited to the said embodiment. For example, an absorptive core may consist only of the lower layer absorptive core in the diaper 1 mentioned above, and also the separation part 44 may be eliminated from the lower layer absorptive core. In addition, a small upper layer absorbent core such as the upper absorbent core 411 in the diaper 1 is laminated on the lower layer absorbent core from which the separation portion 44 is eliminated, thereby forming an absorber having a step on the skin contact surface side. You may do it. Also, a thick central region is formed by forming a deep portion and a shallow portion in the concave portion for stacking of the known stacking device, and depositing a core forming material such as pulp fiber in the concave portion for stacking fiber. And an absorbent core having a thinner side region.
The core wrap sheet 41 may be a continuous sheet that covers the skin contact surface side and the non-skin contact surface side of the absorbent core 40, or the skin contact surface of the absorbent core. The side and the non-skin contact surface side of the absorbent core may be covered with a combination of two core wrap sheets.
Further, the top sheet 2 may be a region in which the entire region above it is the uneven region 2a and the entire region below it is the non-protruded region 2b with the arrangement portion of the side elastic member 45 as a boundary. .

  Further, as shown in FIG. 9A, the non-concave area 2b in the surface sheet 2 may be composed only of the lower layer sheet 23 extending from the uneven area 2a, but is shown in FIG. 9B. As shown in FIG. 9 (c), the upper and lower sheets 22 and 23 extending from the uneven region 2a may be used, and only the upper layer sheet 22 extending from the uneven region 2a may be used. It may be. Moreover, as shown in FIG.9 (d), the uneven | corrugated area | region 2a and the non-protrusion area | region 2b are formed in the sheet | seat 22 by forming the part which shape | molded the solid shape, and the part which is not shaping the solid shape. And may be formed.

  The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.

The following additional notes (pants-type disposable diapers) are further disclosed with respect to the embodiment of the present invention described above.
<1>
Pants comprising an absorbent main body comprising a liquid-permeable topsheet and a liquid-retaining absorbent body, comprising an abdominal part, a dorsal part and a crotch part, and having a waist opening and a pair of leg openings Type disposable diaper,
The top sheet is arranged so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and the non-skin contact surface side of both sides in the longitudinal direction of the absorbent body,
A pair of leak-proof cuffs are provided on both sides in the longitudinal direction of the absorbent main body, and the leak-proof cuffs are respectively provided on the ventral side portion and the back side portion from the non-skin contact surface side of the absorbent main body. It is arranged so as to cover the skin contact surface side of the absorbent main body, and in the crotch part in the wearing state, it is made to stand up,
The absorbent main body has a fixing portion with respect to a member on the non-skin contact surface side at a portion spaced inward in the width direction of the absorber from both longitudinal edges of the absorber.
The surface sheet has a concavo-convex region in which convex portions are formed in a dotted shape in a portion covering the skin contact surface side of the absorber, and the non-skin contact surface side on both sides in the longitudinal direction of the absorber A pants-type disposable diaper in which the part covering the cover is a non-convex region having no irregularities.

<2>
The pants-type disposable diaper according to <1>, wherein a side elastic member for raising the side of the absorber is disposed in the vicinity of both side edges in the longitudinal direction of the absorber.
<3>
In the vicinity of both side edges in the longitudinal direction of the absorbent body, a side elastic member for raising the side part of the absorbent body is disposed, and the top sheet has a non-skin contact surface side of the absorbent body. The underpants-type disposable diaper according to <1>, wherein a range from the covering portion to a portion of the portion covering the skin contact surface side of the absorbent body is the non-concave region.
<4>
<1> wherein the cuff has a leak-proof cuff that rises at the crotch part, and a gap into which a liquid flows is formed between the non-skin contact surface side and the leak-proof cuff on both sides of the absorbent main body. The pants-type disposable diaper according to any one of to <3>.
<5>
The pants-type disposable diaper according to any one of <1> to <4>, wherein a leakproof sheet is not disposed on the non-skin contact surface side of the absorbent body on both sides of the absorbent main body. .
<6>
The absorbent body has a central region and side regions located on both sides thereof and thinner than the central region, and on the skin contact surface side of the absorbent body at a boundary portion between the central region and the lateral region. The pants-type disposable diaper according to any one of <1> to <5>, wherein the pants-type disposable diaper has a step and the uneven region covers a step portion of the absorber.
<7>
<1> to <6, wherein the concavo-convex region has a configuration in which an upper layer sheet shaped into a concavo-convex shape and a lower layer sheet not shaped into a concavo-convex shape are joined to each other in a concave portion of the upper layer sheet. > The pants-type disposable diaper according to any one of the above.
<8>
<1> to <7>, wherein the surface sheet has a thickness in the non-concave area of 60% or less, more preferably 25% or less of the thickness T2 in the uneven area. Pants-type disposable diapers.
<9>
The convex part in the said uneven | corrugated area | region is the underpants type disposable diaper any one of said <1>-<8> arrange | positioned in zigzag form in planar view.
<10>
The pants-type disposable diaper according to any one of <1> to <9>, wherein the absorbent body is capable of absorbing liquid also from the non-skin contact surface side on both side portions in the longitudinal direction.

<11>
The concavo-convex region is formed at least on the widthwise central portion of the absorber, and preferably 50% with respect to the width between the upper edge portions of the leak-proof cuff on the ventral side or the back side. The underpants-type disposable diaper according to any one of the above <1> to <10>, having the above width, more preferably having a width of 100% or more.
<12>
The non-woven fabric constituting the upper layer sheet or the sheet material forming the convex portion preferably has a fineness of constituent fibers of 0.1 to 5.0 dtex, more preferably 0.1 to 3.3 dtex. The pants-type disposable diaper according to any one of 1> to <11>.
<13>
The concavo-convex region has an upper layer sheet and a lower layer sheet, and the fineness of the constituent fibers in the case where the lower layer sheet is composed of a nonwoven fabric is preferably 1 to 20 dtex, more preferably 1.5 to 6 dtex. The pants-type disposable diaper according to any one of 1> to <12>.
<14>
<1> to <13>, wherein the leak-proof cuff is fixed in a state extending from the non-skin contact surface side to the skin contact surface side of the absorbent main body at the abdominal side portion and the back side portion. The underpants type disposable diaper of any one.
<15>
The absorbent body includes an absorbent core, and the absorbent core includes a separation portion penetrating the absorbent core at a crotch portion, any one of the above items <1> to <14> Pants-type disposable diapers as described.
<16>
The absorbent body has an absorbent core comprising a lower absorbent core and an upper absorbent core superimposed on the skin contact surface side of the lower absorbent core, and the lower absorbent core includes the upper absorbent core in the crotch part. The underpants-type disposable diaper according to any one of <1> to <14>, which has a separating portion that penetrates the lower absorbent core on both sides of the overlapped portion.
<17>
The underpants-type disposable diaper according to <15> or <16>, wherein a pitch between the convex portions is larger than a thickness of the absorber in a portion adjacent to the cut-off portion.
<18>
The pants-type disposable diaper according to any one of <15> to <17>, wherein a pitch between the convex portions is 2 mm or more and 20 mm or less.
<19>
The pants-type disposable diaper according to any one of <15> to <18>, wherein the absorber has a thickness of 1 mm to 10 mm.
<20>
The underpants-type disposable diaper according to any one of <15> to <19>, wherein the width of the separation part is 2 to 20 mm.

<21>
The pants-type disposable diaper according to any one of <15> to <20>, wherein a pitch between the convex portions is ½ or more of a width of the cut-away portion.
<22>
In the concavo-convex region, convex portions and concave portions are arranged alternately and in a row in the diaper longitudinal direction, and the rows are formed in multiple rows in the diaper width direction, <1> The pants-type disposable diaper according to any one of to <20>.
<23>
The uneven region has an upper layer sheet and a lower layer sheet,
The pants-type disposable diaper according to any one of the above items <1> to <22>, wherein the upper layer sheet is joined to the lower layer sheet in the whole or a part of the recess.
<24>
The pants-type disposable diaper according to any one of <1> to <23>, wherein the convex portion is hollow.
<25>
The convex portion has a height T1 of preferably 0.1 mm or more, more preferably 0.2 mm or more, preferably 5 mm or less, more preferably 3 mm or less, and more specifically preferably 0. The pants-type disposable diaper according to any one of <1> to <24>, which is 1 mm to 5 mm, more preferably 0.2 mm to 3 mm.
<26>
The thickness of the surface sheet of the portion having the convex portion is preferably 0.2 mm or more, more preferably 0.5 mm or more, and preferably 6 mm or less, more preferably 4 mm or less, more specifically, The pants-type disposable diaper according to any one of <1> to <25>, preferably 0.2 mm to 6 mm, more preferably 0.5 mm to 4 mm.
<27>
The number of the convex portion of the area of 10 cm ² per the irregular region is 20 to 200 pieces, preferably 50 to 150 pieces, the <1> to underpants type disposable according to any one of <26> Diapers.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 2a Uneven region 2b Non uneven region 21 Convex part 22 Upper layer sheet 22a Concave part 23 Lower layer sheet 3 Leak-proof sheet 4 Absorber 4e Longitudinal side edge 4s Longitudinal side part 40 Absorbent core 411 Upper part Absorption core 412 Lower absorption core 41 Core wrap sheet 42 Central region 43 Side region 44 Separation part 45 Side elastic member 5 Absorbent body 6 Leakage cuff 6a Upper edge 6b Standing base end 60 Sheet for leakage prevention cuff 7 Waist opening 8 Leg opening 10 Exterior body 11, 12 Exterior body forming sheet

Claims (5)

Pants comprising an absorbent main body comprising a liquid-permeable topsheet and a liquid-retaining absorbent body, comprising an abdominal part, a dorsal part and a crotch part, and having a waist opening and a pair of leg openings Type disposable diaper,
The top sheet is arranged so as to cover the skin contact surface side of the absorbent body, both side edges in the longitudinal direction of the absorbent body, and the non-skin contact surface side of both sides in the longitudinal direction of the absorbent body,
A pair of leak-proof cuffs are provided on both sides in the longitudinal direction of the absorbent main body, and the leak-proof cuffs are respectively provided on the ventral side portion and the back side portion from the non-skin contact surface side of the absorbent main body. It is arranged so as to cover the skin contact surface side of the absorbent main body, and in the crotch part in the wearing state, it is made to stand up,
The absorbent main body has a fixing portion with respect to a member on the non-skin contact surface side at a portion spaced inward in the width direction of the absorber from both longitudinal edges of the absorber.
The surface sheet has a concavo-convex region in which convex portions are formed in a dotted shape in a portion covering the skin contact surface side of the absorber, and the non-skin contact surface side on both sides in the longitudinal direction of the absorber The part that covers is a non-concave area that does not have irregularities ,
The absorbent body has a central region and side regions located on both sides thereof and thinner than the central region, and on the skin contact surface side of the absorbent body at a boundary portion between the central region and the lateral region. A pants-type disposable diaper having a step and the uneven region covering a step portion of the absorber .   In the vicinity of both side edges in the longitudinal direction of the absorbent body, a side elastic member for raising the side part of the absorbent body is disposed, and the top sheet has a non-skin contact surface side of the absorbent body. The underpants-type disposable diaper according to claim 1, wherein a range from a covering portion to a part of a portion covering the skin contact surface side of the absorbent body is the non-concave region. The uneven region, and an upper sheet which is shaped into irregularities, and the lower layer sheet that is not shaped into irregularities, has a configuration connected together at the recess of the upper layer sheet, according to claim 1 or 2 Pants-type disposable diapers. The pants-type disposable diaper according to any one of claims 1 to 3 , wherein the convex portions in the concave-convex region are arranged in a staggered manner in a plan view. The pants-type disposable diaper according to any one of claims 1 to 4 , wherein the absorbent body is capable of absorbing liquid also from the non-skin contact surface side at both side portions in the longitudinal direction.

Images