JP6050650B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as a disposable diaper.

  During wearing of the disposable diaper, the inside of the diaper is easily increased in humidity due to urination and sweating of the wearer and easily stuffy, and therefore, skin troubles such as redness and itching of the wearer's skin are likely to occur. In particular, in disposable diapers, the waist part and the waistline part are in close contact with the skin of the wearer. Therefore, it has been proposed to attach a sweat absorbing sheet that contacts the wearer's skin and absorbs sweat to the skin-facing surfaces of the diaper waist and waistline.

  For example, in Patent Document 1, in a disposable diaper comprising an absorbent main body provided with a three-dimensional guard (three-dimensional gather) and an outer package disposed on the non-skin-facing surface side of the absorbent main body, Covering the skin-facing surface of a portion (end flap on the back side) extending from the longitudinal end on the back side of the absorbent main body in the longitudinal direction with a rectangular sweat-absorbing sheet in plan view Have been described. In the disposable diaper described in Patent Document 1, the sweat-absorbing sheet covers not only the exterior body (end flap on the back side) but also the longitudinal end on the back side of the absorbent main body adjacent thereto. The longitudinal end of the three-dimensional gather on the back side is covered with the sweat absorbing sheet. Patent Document 2 describes a disposable diaper in which the sweat-absorbing sheet is arranged in the same manner as Patent Document 1, and [0063] of Patent Document 2 describes a shape of the sweat-absorbing sheet in a plan view other than a rectangular shape. Describes that an oval shape, an oval shape, a bowl shape, or the like can be employed.

JP 2004-358099 A JP 2009-148531 A

  Although the disposable diaper of patent documents 1 and 2 can suppress the skin trouble resulting from a sweat of a wearer to some extent by the effect | action of a perspiration sheet, there exists room for improvement regarding the prevention technique of a skin trouble.

  Therefore, the subject of this invention is providing the absorbent article which can prevent the skin trouble resulting from a sweat of a wearer effectively.

  The present invention comprises an absorptive main body, has a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular thereto, and is arranged on the abdominal side portion and crotch portion arranged on the wearer's ventral side when worn. An absorbent article having a crotch portion and a dorsal side portion arranged on the back side in the longitudinal direction, and facing the wearer's skin side when worn on both side portions along the longitudinal direction of the absorbent main body. A pair of three-dimensional gathers having a portion standing upright is provided, and the three-dimensional gather is joined to the absorbent main body on the skin-facing surface of the absorbent main body in the back side portion, so that the three-dimensional gather is raised. An inhibited standing inhibition portion is formed, and the standing inhibition portion is disposed on at least the back side portion and is covered with a sweat absorbing sheet that contacts the wearer's skin and absorbs sweat, The sweat-absorbing sheet has a longitudinal direction on the back side of the absorbent main body in plan view. A longitudinally outer end extending in the lateral direction through the outer side in the longitudinal direction than the portion, and a longitudinally inner end extending in the lateral direction and positioned on the opposite side of the longitudinal outer end. And the said subject is solved by providing the absorbent article which has some convex part which a part of this vertical direction inner end protrudes on the opposite side to this vertical direction outer end side. .

  The absorbent article of the present invention has a high ability to absorb sweat and can effectively prevent skin troubles caused by the sweating of the wearer.

FIG. 1 is a perspective view of an example of a pants-type disposable diaper that is an embodiment of the absorbent article of the present invention. FIG. 2 is a plan view of the skin facing surface side (absorbent main body side) in a developed state in which the disposable diaper shown in FIG. 1 is separated by a side seal portion and the elastic members of the respective portions are extended and expanded in a planar shape. FIG. 3 is an exploded perspective view of the disposable diaper shown in FIG. 1. 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. 6 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG. Fig.7 (a)-FIG.7 (d) are each a top view which shows typically other embodiment of the sweat absorbing sheet which concerns on this invention.

  Hereinafter, an absorptive article of the present invention is explained based on a desirable embodiment, referring to drawings. 1-6, the underpants type disposable diaper 1 which is one Embodiment of the absorbent article of this invention is described. The diaper 1 includes an absorptive main body 5, has a longitudinal direction X corresponding to the wearer's front-rear direction, and a lateral direction Y orthogonal thereto, and is disposed on the abdomen side of the wearer when worn. The crotch part B arranged in the crotch part and the back side part C arranged on the back side are provided in the vertical direction X.

  More specifically, as shown in FIGS. 1 to 6, the diaper 1 includes a liquid-permeable surface sheet 2 that forms a skin-facing surface, a liquid-impermeable or water-repellent material that forms a non-skin-facing surface (hereinafter referred to as these). Absorptive main body 5 having a liquid-impermeable back surface sheet 3 and a liquid-retaining absorbent body 4 disposed between both sheets 2 and 3, and the non-skin of the absorbent main body 5 And an exterior body 6 that is positioned on the opposite surface side (back surface sheet 3 side) and fixes the absorbent main body 5. The exterior body 6 forms the outer shape of the unfolded diaper 1 as shown in FIG. 2, and the periphery of the exterior body 6 forms the outline of the unfolded diaper 1. The absorbent main body 5 and the exterior body 6 are joined by an adhesive.

  In addition, in this specification, a skin opposing surface is a surface turned to a wearer's skin side at the time of wear of an absorptive article in an absorptive article (diaper 1) or its component (absorbent main body 5 grade), The non-skin facing surface is a surface of the absorbent article or its constituent member that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn.

  The absorbent main body 5 is formed by integrating the top sheet 2, the back sheet 3, and the absorber 4. As the top sheet 2, the back sheet 3, and the absorbent body 4, various types conventionally used for this type of article can be used without any particular limitation. For example, various nonwoven fabrics or apertured films can be used as the top sheet 2, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 3. As the absorbent body 4, it is possible to use a structure including an absorbent core made of water-absorbing polymer particles and a fiber material such as pulp fiber. The absorbent core is a core wrap sheet such as tissue paper. It may be covered.

  As shown in FIG. 2, the outer body 6 has a pair of leg edges 10, 10 whose both side edges along the vertical direction X are curved inwardly in the crotch part B in an inward arc shape. When viewed from above, the central portion in the longitudinal direction X has an hourglass-like shape that is bound inward. The exterior body 6 has side edges A1 and A2 along the longitudinal direction X in the ventral side A and side edges C1 and C2 along the longitudinal direction X in the back side C. The adhesive, heat seal, and ultrasonic seal As shown in FIG. 1, a pair of side seal portions S and S are formed in the diaper 1, and as a result, the waist opening WH and the pair of pairs are joined. Leg openings LH and LH are formed.

  The exterior body 6 is comprised from the laminated body of the outer layer sheet 61 and the inner layer sheet 62, as shown in FIG.3, FIG4 and FIG.6. The outer layer sheet 61 forms a non-skin facing surface (outer surface) of the diaper 1, and the inner layer sheet 62 forms a part of the skin facing surface (inner surface) of the diaper 1 adjacent to the outer layer sheet 61 in the thickness direction. Yes. Both the outer layer sheet 61 and the inner layer sheet 62 are made of a water-repellent nonwoven fabric. The outer layer sheet 61 and the inner layer sheet 62 are joined by an adhesive (not shown) at a predetermined site. In addition to the same shape and the same size as the inner layer sheet 62, the outer layer sheet 61 is further outward from the end in the longitudinal direction X on the ventral side A side of the inner layer sheet 62 when the sheets 61 and 62 are laminated. 61 </ b> A and a dorsal extension 61 </ b> C extending outward from the end in the longitudinal direction X on the dorsal side C side of the inner layer sheet 62. As shown in FIG. 2, both extended portions 61 </ b> A and 61 </ b> C of the outer layer sheet 61 respectively cover both end portions 51 and 51 in the longitudinal direction X of the absorbent main body 5 arranged and fixed on the inner layer sheet 62. It is folded back to the inner layer sheet 62 side and fixed to other constituent members (the inner layer sheet 62, the absorbent main body 5, and the three-dimensional gather 7) of the diaper 1 facing both the extending portions 61A and 61C by an adhesive.

  As shown in FIG. 2, one or a plurality of waist elastic members 11 for forming waist gathers are arranged in a stretched state in the lateral direction Y in the waist portion D in each of the ventral portion A and the back portion C. Yes. The waist elastic member 11 extends over substantially the entire length in the lateral direction Y of the waist portion D. The waist part D is a part located around the waist of the wearer, and is generally the entire length in the longitudinal direction X of the diaper 1 from the end in the longitudinal direction X on the abdomen side A side or the back side part C side of the diaper 1. It is an area up to a length of 1 to 15%. Thereby, an annular waist gather substantially continuous over the entire circumference is formed in the waist opening WH (see FIG. 1).

  In addition, as shown in FIG. 2, one or a plurality of leg elastic members 12 for forming leg gathers are stretched on both side portions (leg edge portions) 10, 10 along the longitudinal direction X of the crotch B. It is arranged with. As a result, an annular leg gather substantially continuous over the entire circumference is formed on the leg edge 10 which is the opening edge of each of the pair of leg openings LH and LH (see FIG. 1). The leg elastic member 12 is arranged in an extended state so that elastic stretchability is expressed at a portion outside in the lateral direction Y from at least both side edges along the longitudinal direction X of the absorbent main body 5 and absorbs. At least the central part in the lateral direction Y of the part where the main body 5 exists is not arranged in a state where the elastic stretchability is expressed.

  Further, as shown in FIG. 2, apart from these elastic members 11, 12, in the waist part E located between the waist part D and the crotch part B in the abdominal part A and the back part C, respectively. The waist elastic member 13 for forming one or a plurality of waist circumference gathers is arranged in an extended state in the lateral direction Y. The waist elastic member 13 is arranged in an extended state so that elastic stretchability is exhibited at least in the outer portion in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent main body 5 and absorbs. At least the central part in the lateral direction Y of the site where the sex main body 5 exists is not arranged in a state where the elastic stretchability is expressed.

  Each of the elastic members 11, 12, 13 described above is sandwiched and fixed between the outer layer sheet 61 and the inner layer sheet 62 constituting the exterior body 6 by a bonding means such as an adhesive. Each of the elastic members 11, 12, and 13 is formed by forming a stretchable material such as natural rubber, polyurethane resin, foamed urethane resin, or hot-melt stretchable member into a thread shape (thread rubber) or a belt shape (flat rubber). Preferably used.

  As shown in FIG. 2 to FIG. 4, a pair of three-dimensional gathers 7, 7 having portions that stand up toward the wearer's skin when worn are provided on both sides along the longitudinal direction X of the absorbent main body 5. ing. In the present embodiment, the three-dimensional gather 7 is provided over substantially the entire length in the longitudinal direction X of the absorbent main body 5, and at least one side edge side along the longitudinal direction X in the crotch part B is worn by the wearer. A base wall portion 70 that stands up toward the skin side, and is connected to the one side edge portion (upper end portion) of the base wall portion 70, and the elastic member 14 for forming a three-dimensional gather is stretched along the longitudinal direction X. It is comprised including the elastic expansion-contraction part 71 distribute | arranged.

  The solid gather 7 will be further described. The solid gather 7 includes a single side sheet 15 having a certain width in the vertical direction X in addition to the solid gather forming elastic member 14. As shown in FIG. 4, the side seat 15 is folded back so as to have a shape in which an elastic expansion / contraction part 71 is connected to the base wall part 70 and one side edge part (upper end part) thereof. Has a two-layer structure in which one side sheet 15 is folded. The three-dimensional gather forming elastic member 14 is arranged in an extended state between the two side sheets 15 and 15 constituting the two-layer structure, and is joined to the side sheets 15 and 15 by an adhesive (not shown). Yes. As the elastic member 14 for forming a three-dimensional gather, the same members as the elastic members 11, 12, 13 can be used. As the side sheet 15, various kinds of materials conventionally used as three-dimensional gathers (leak barriers) in this type of article can be used without particular limitation. For example, a water-repellent nonwoven fabric, a sheet made of a resin film, a nonwoven fabric A laminate of resin and a resin film can be used.

  As shown in FIG. 4, the base wall portion 70 is located between the absorbent body 4 and the back sheet 3 in the absorbent main body 5 on the other side edge side (lower end side) where the elastic stretchable portion 71 is not connected. 1 side edge side (upper end side) where the elastic expansion and contraction part 71 is continuously provided starting from the fixing part is fixed to the wearer's skin side when worn. Stand up. One or more (two in the present embodiment) three-dimensional gather forming elastic members 14 extending in the longitudinal direction X are joined to and fixed to the side sheets 15 in the stretched state by the elastic stretchable portion 71. And the expansion / contraction direction thereof coincides with the vertical direction X.

  As shown in FIGS. 2 and 3, on the skin facing surface of the absorbent main body 5 in the back side portion C (skin facing surface of the topsheet 2), it is lateral from both side edges along the longitudinal direction X of the absorbent main body 5. In the direction Y, a solid gather 7 is joined to the absorbent main body 5 to form a standing inhibition portion 72 </ b> C in which the standing of the solid gather 7 is inhibited. In the standing inhibition portion 72C, the elastic expansion / contraction portion 71 at the end portion in the longitudinal direction X on the back side portion C side of the three-dimensional gather 7 has an adhesive, heat, and heat on the absorbent main body 5 (surface sheet 2) as shown in FIG. It is formed by being joined by a known joining means such as a seal or an ultrasonic seal, and the stretchability of the elastic stretchable portion 71 is inhibited in the standing-up inhibiting portion 72C. In the present embodiment, further, on the skin facing surface (skin facing surface of the topsheet 2) of the absorbent main body 5 in the ventral side A, the lateral direction Y from both side edges along the longitudinal direction X of the absorbent main body 5. In the inner side, the standing gathering part 72A (standup inhibiting part different from the standing inhibiting part 72C of the dorsal part C) in which the gathering of the solid gathering 7 is joined to the absorbent main body 5 and the standing of the solid gathering 7 is inhibited Is formed. As for this standing inhibition part 72A of the abdominal side part A, the elastic expansion-contraction part 71 in the edge part of the vertical direction X of the abdominal side A side of the three-dimensional gather 7 is joined to the absorptive main body 5 as shown in FIG. Is formed. A part of each of the standing inhibition portions 72A and 72C (outside in the longitudinal direction X) is covered with the extended portions 61A and 61C of the outer layer sheet 61 that are folded back (see FIGS. 2 and 6).

  Thus, in this embodiment, both ends of the longitudinal direction X of each of the pair of three-dimensional gathers 7 and 7 (elastic stretchable portions 71 at both ends) are formed on the skin-facing surface of the absorbent main body 5. Standing inhibition portions 72A and 72C are formed which are joined to 5 (surface sheet 2) and the standing of the three-dimensional gather 7 (base wall portion 70) is inhibited. Moreover, the site | part (part located in the crotch lower part B) between both standing inhibition parts 72A and 72C in each three-dimensional gather 7 does not inhibit the elasticity of the elastic expansion-contraction part 71, and a wearer's skin at the time of wear Stand up to the side. The standing part of each three-dimensional gather 7 extends over at least the entire length of the crotch part B in the longitudinal direction X, and in this embodiment, further extends to the part of the abdominal part A and the back part C near the crotch part B. Yes.

  And in this embodiment, as shown in FIG.2, FIG3 and FIG.6, the standing inhibition part 72C of the back side part C is distribute | arranged at least to the back side part C, and contacts with a wearer's skin, and sweats. It is covered with a sweat absorbing sheet 20 that absorbs water. The sweat-absorbent sheet 20 forms part of the skin-facing surface (inner surface) of the diaper 1 together with the absorbent main body 5 (surface sheet 2), the three-dimensional gather 7, and the inner layer sheet 62, and comes into contact with the wearer's skin. The sweat absorbing sheet 20 covering the standing inhibition portion 72C of the back side portion C is usually disposed only on the back side portion C as in the present embodiment, or the back side portion C in the back side portion C and the crotch portion B. It is arranged only in the portion straddling the close portion (the portion positioned on the back side of the virtual straight line (not shown) that bisects the diaper 1 in the longitudinal direction X).

  The sweat-absorbent sheet 20 has adhesive, heat seal, ultrasonic waves to other components of the diaper 1 [absorbent main body 5 (surface sheet 2), three-dimensional gather 7, exterior body 6 (inner layer sheet 62)]. It is joined partially or entirely by a known joining means such as a seal. The sweat-absorbent sheet 20 in the present embodiment is partially bonded to another diaper constituent member facing it by a hot-melt adhesive, and the bonded portion 8 is formed as shown in FIG. . The joining portion 8 has a linear shape parallel to the lateral direction Y in a plan view as shown in FIG. 2, and extends over the entire length of the sweat absorbing sheet 20 in the lateral direction Y. A plurality of (four in the embodiment shown in FIG. 6) linear junctions 8 are formed at predetermined intervals in the vertical direction X.

  In the three-dimensional gather 7, since the standing part (the part sandwiched between the standing-inhibiting portions 72A and 72C) is in line contact with the wearer's skin while the diaper 1 is worn, the sweat of the wearer is hardly accumulated. On the other hand, since the standing inhibition part 72C of the back side part C always contacts the wearer's skin while the diaper 1 is worn, the wearer's sweat tends to accumulate. In addition, the standing inhibition portion 72C is formed by joining the elastic expansion / contraction portion 71 (side sheet 15) and the absorbent main body 5 (surface sheet 2) of the three-dimensional gather 7 to each other via an adhesive or by fusion. Therefore, it is hydrophobic and hardly absorbs sweat. Therefore, the standing inhibition portion 72C is likely to cause skin troubles such as redness and itching of the wearer's skin. In the present embodiment, by covering the standing inhibition portion 72C, which is a hydrophobic portion that is always in surface contact with the skin, with the sweat absorbing sheet 20, it induces effective sweat absorption, Eliminates the stuffiness caused by perspiration and prevents skin problems.

  However, even if the sweat absorbing sheet 20 that covers the standing inhibition portion 72C of the dorsal side C is employed, if the shape of the sweat absorbing sheet 20 in plan view is not appropriate, skin troubles caused by sweating of the wearer are effectively prevented. Rather, the absorption function of the absorbent body 4 may be hindered by the sweat-absorbing sheet 20 being disposed on the skin facing surface side of the absorbent body 4. That is, the constant contact portion of the back side C of the diaper 1 with the wearer's skin, which can be a major cause of skin trouble, has a constant width (length in the longitudinal direction X) in a plan view as shown in FIG. It is not in the shape of a band (rectangular shape), and has a special shape in which the width changes in the lateral direction Y due to the presence of a ridge that is rich in undulations, without interfering with the absorption action of the absorber 4 as much as possible. In order to effectively prevent skin troubles, it is necessary to make the shape of the sweat-absorbent sheet 20 in plan view correspond to such a special shape of the backside portion C that is always in contact with the wearer's skin.

  From such a viewpoint, in the present embodiment, the planar view shape of the sweat-absorbent sheet 20 is devised as follows. That is, the sweat-absorbent sheet 20 extends in the lateral direction Y through the outside in the longitudinal direction X from the end portion 51 in the longitudinal direction X on the back side C side of the absorbent main body 5 in a plan view as shown in FIG. The vertical outer end 21, and the vertical outer end 21 is located on the opposite side of the vertical direction X and extends in the horizontal direction Y, and the vertical inner end 22 A plurality of protrusions 23 are provided, one part of which protrudes on the opposite side to the longitudinal outer end 21 side. More specifically, as shown in FIG. 2, the sweat-absorbent sheet 20 is such that the longitudinal outer end 21 is a straight line parallel to the lateral direction Y, whereas the longitudinal inner end 22 is such a straight line. And has a plurality of portions projecting to the opposite side to the longitudinal outer end 21 side, and the outside of the longitudinal direction X across a virtual straight line (not shown) that bisects the sweat absorbent sheet 20 in the longitudinal direction X. An asymmetric shape is formed between the side and the inward side.

  In the present invention, the convex portion of the sweat-absorbent sheet has a vertical direction that is higher than the virtual reference line of the sweat-absorbent sheet when a virtual reference line (not shown) parallel to the lateral direction passing through the base of the convex portion is drawn. It is a part located in the direction inward (side near the longitudinal center of the absorbent article). The root of the convex part is the rising part of the sweat absorbing sheet in the vertical direction inner end to the opposite side to the vertical outer end side, and normally the top of the convex part (the most protruding side opposite to the vertical outer end side) One on each side in the lateral direction across the portion). For example, there are two roots of the convex portion 23 of the sweat absorbent sheet 20, one end or the other end of the longitudinal inner end 22 of the sweat absorbent sheet 20 and the recessed portion 24. When the positions of the two roots in the vertical direction are different, the virtual reference line is drawn so as to pass through the root closer to the longitudinal center (the crotch part) of the absorbent article. When the top portion 23p of the convex portion 23 is configured to include one end or the other end of the longitudinal inner end 22 of the sweat absorbent sheet 20D as in a sweat absorbent sheet 20D described later (see FIG. 7D), the convex portion There is only one root of 23 near the center (indentation 24) in the lateral direction Y.

  In order to prevent skin troubles effectively without obstructing the absorption action of the absorbent body 4 as much as possible by employing the sweat absorbent sheet 20, a plurality of convex portions 23 of the sweat absorbent sheet 20 are necessary. If a sweat-absorbing sheet having only one convex portion 23 is used, when the standing inhibition portion 72C of each of the pair of three-dimensional gathers 7 and 7 is covered with the sweat-absorbing sheet, the top of the only one convex portion 23 is a pair. Since the three-dimensional gathers 7 and 7 are positioned between the three-dimensional gathers 7 and 7, in the arrangement form of the sweat absorbing sheet, the constant contact portion with the wearer's skin on the back side C cannot be sufficiently covered with the sweat absorbing sheet. The skin trouble caused by the sweating of the wearer cannot be prevented, and the total area of the overlapping portion between the sweat-absorbing sheet and the absorber 4 is too large, so that the absorbing action of the absorber 4 may be hindered.

  In the present embodiment, the sweat absorbing sheet 20 includes all of the following configurations i to vi. By providing the sweat absorbent sheet 20 with all of the following configurations i to vi, the total area of the overlapping portion between the sweat absorbent sheet 20 and the absorbent body 4 can be minimized, and the absorbent body 4 resulting from the adoption of the sweat absorbent sheet 20 can be reduced. While suppressing the lowering of the absorption action, it is possible to reliably cover the constant contact portion with the wearer's skin on the back side C including the standing inhibition portion 72C of the back side C with the sweat absorbent sheet 20. As a result, skin troubles caused by the sweating of the wearer are more effectively prevented.

The sweat-absorbent sheet 20 has a recess 24 at the center in the lateral direction Y, with a part of the longitudinal inner end 22 recessed toward the longitudinal outer end 21 as compared to the peripheral part in plan view. (Configuration i. See FIGS. 2 and 3). In this embodiment, as shown in FIG. 2, the hollow part 24 is located between a pair of solid gathers 7 and 7 (center), and is comprised by the curve.
-The convex part 23 is located in each of both sides on both sides of the virtual straight line L which bisects the sweat-absorbent sheet 20 to the horizontal direction Y (configuration ii. Refer FIG. 2). In the present embodiment, one convex portion 23 is located on each side of the virtual straight line L.
The sweat-absorbing sheet 20 has two convex portions 23 (configuration iii. See FIGS. 2 and 3).
-The standing inhibition part 72C of the back side part C is covered with the convex part 23 of the sweat-absorbent sheet 20 (configuration iv, see FIG. 2).
-The convex part 23 is comprised by the curve (the structure v. Refer FIG.2 and FIG.3). In the present embodiment, the entire longitudinal inner end 22 of the sweat-absorbent sheet 20 including the periphery of the convex portion 23 is configured by a curve.
-The top part 23p of the convex part 23 is located in the outer side of the horizontal direction Y of the absorptive main body 5 (structure vi. Refer FIG. 2).

  Moreover, in this embodiment, the magnitude | size of the sweat absorbing sheet 20 is made smaller than the back side part C, as shown in FIG. 2, and the periphery (contour line) of the sweat absorbing sheet 20 is the back side part C ( It exists inward rather than the periphery (contour line) of the part which comprises the back side part C in the exterior body 6. FIG. If the size of the sweat absorbent sheet 20 is the same as that of the back side portion C, and the periphery of the sweat absorbent sheet 20 and the periphery of the back side portion C coincide with each other, the thickness of the members constituting the side seal portion S increases. Since there exists a possibility that intensity | strength may fall, it is preferable that the sweat absorbing sheet 20 is smaller than the back side part C like this embodiment. From such a viewpoint, the separation distance between the peripheral edge of the sweat absorbent sheet 20 and the peripheral edge of the back side portion C (outer layer body 6), in particular, the side edge along the longitudinal direction X of the sweat absorbent sheet 20 and the vicinity of the side edge. The distance P (see FIG. 2) between the side edge portions C1 and C2 (side edge portions constituting the side seal S) along the longitudinal direction X of the back side portion C (outer layer body 6) is preferably 5 mm or more, More preferably, it is 10 mm or more, and preferably 120 mm or less, More preferably, it is 70 mm or less, More specifically, Preferably it is 10-50 mm, More preferably, it is 20-40 mm. In addition, such a separation distance is in the state which extended each elastic member distribute | arranged to the absorbent article.

  Moreover, in this embodiment, as shown in FIG. 2, the sweat-absorbent sheet 20 is arranged so that the convex portion 23 does not overlap the leg elastic member 12. When the leg elastic member 12 is disposed (the leg edge portion 10), a large number of wrinkles are generated due to contraction of the leg elastic member 12 while the diaper 1 is worn. The sweat absorbing sheet cannot follow the shape of the wrinkle generation site, resulting in a gap between the wearer's leg and the sweat absorbing sheet facing the wearer's leg. There is a risk of triggering. Therefore, in the present embodiment, the sweat absorbing sheet 20 is arranged so that the convex portion 23 does not overlap the leg elastic member 12.

From the viewpoint of more surely exhibiting the above-described effects of the sweat absorbent sheet 20, it is preferable to set the dimensions and the like of each part of the sweat absorbent sheet 20 as follows. In addition, the dimension (length etc.) of each part shown below is in the state which extended | stretched each elastic member distribute | arranged to the absorbent article.
The separation distance Q (see FIG. 2) between the top 23p of the protrusion 23 and the recess 24 adjacent thereto is preferably 5 mm or more, more preferably 10 mm or more, and preferably 70 mm or less, more preferably 60 mm or less, More specifically, it is preferably 10 to 50 mm, and more preferably 20 to 40 mm.
The separation distance R (see FIG. 2) between the side edge along the longitudinal direction X of the absorbent main body 5 and the top 23p of the convex portion 23 located outward in the lateral direction Y of the side edge is preferably 5 mm or more. The thickness is preferably 15 mm or more, and preferably 100 mm or less, more preferably 90 mm or less, more specifically, preferably 20 to 70 mm, and more preferably 30 to 60 mm.

The length W1 (see FIG. 2) in the longitudinal direction X of the sweat absorbing sheet 20 at the top 23p of the convex portion 23 is preferably 40 mm or more, more preferably 55 mm or more, and preferably 130 mm or less, more preferably 110 mm or less, and more. Specifically, it is preferably 55 to 110 mm, more preferably 70 to 100 mm.
The length W2 (see FIG. 2) in the longitudinal direction X of the sweat-absorbent sheet 20 in the recess 24 is preferably 30 mm or more, more preferably 40 mm or more, and preferably 90 mm or less, more preferably 80 mm or less, more specifically. Is preferably 40 to 80 mm, more preferably 50 to 70 mm.

  As the sweat absorbing sheet 20, a hydrophilic fiber sheet can be used. The sweat-absorbent sheet 20 preferably contains 20% by mass or more, particularly 50% by mass or more of hydrophilic fibers. The sweat-absorbent sheet 20 may be composed of 100% by mass of hydrophilic fibers, or may be composed of hydrophilic fibers and hydrophobic fibers. In the latter case, the sweat absorbent sheet 20 can contain hydrophobic fibers in an amount of less than 80% by weight, in particular less than 50% by weight. Examples of hydrophilic fibers include cellulose fibers such as rayon, cotton, and pulp, and fibers obtained by performing various hydrophilic treatments on fibers made of a hydrophobic thermoplastic resin. On the other hand, as the hydrophobic fibers, for example, fibers made of various thermoplastic resins can be used. Examples of the fiber sheet containing these fibers include various nonwoven fabrics such as spunlace nonwoven fabric and air-through nonwoven fabric, and paper.

The basis weight of the sweat-absorbing sheet 20 is preferably 10 g / m ² or more, more preferably 25 g / m ² or more, from the viewpoint of the balance between the ability to absorb sweat and the promotion of the evaporation of sweat absorbed by the sweat-absorbing sheet 20. , preferably 90 g / m ² or less, more preferably 100 g / m ² or less, and more specifically, preferably 25~90g / m ^2, more preferably 40~75g / m ^2.

  FIG. 7 shows other embodiments 20A to 20D of the sweat absorbent sheet according to the present invention. Regarding the sweat-absorbing sheets 20A to 20D, the points different from the above-described sweat-absorbing sheet 20 will be mainly described, and description of similar points will be omitted. About the point which is not demonstrated especially, the description about the sweat-absorbent sheet 20 is applied suitably.

  The sweat absorbent sheet 20A shown in FIG. 7A does not have the configuration v. That is, in the sweat absorbent sheet 20A, the convex portion 23 is not formed by a curve but is formed by a straight line, and has a rectangular shape in plan view. In the sweat-absorbent sheet 20A, the entire longitudinal inner end 22 is composed of straight lines (straight lines extending in the longitudinal direction X and straight lines extending in the lateral direction Y), and not only the convex portions 23 but also the recess portions 24 are composed of straight lines. Has been. Further, the sweat absorbing sheet 20A does not have the configuration vi. That is, in the sweat-absorbent sheet 20A, the top 23p of the convex portion 23 is partly located outside the lateral direction Y of the absorbent main body 5, but the entire top 23p is entirely absorbent. 5 is not located outward in the lateral direction Y, and partially overlaps the absorbent main body 5 (solid gathers 7) in plan view.

  Neither the sweat absorbing sheet 20B shown in FIG. 7B nor the sweat absorbing sheet 20C shown in FIG. 7C has the configuration vi. That is, in the sweat-absorbent sheets 20B and 20C, the top 23p of the convex portion 23 is located outside the absorbent body 5 in the lateral direction Y so that the entire top 23p overlaps the absorbent body 5 in plan view. Not. In the sweat absorbent sheet 20B, the outer side in the lateral direction Y of the plural (two) convex portions 23 at the longitudinal inner end 22 is a straight line parallel to the longitudinal outer end 21, whereas the sweat absorbent sheet In 20C, the entire longitudinal inner end 22 is configured by a curve.

  In the sweat absorbent sheet 20D shown in FIG. 7D, the top portion 23p of the convex portion 23 is configured to include one end or the other end of the longitudinal inner end 22 of the sweat absorbent sheet 20D (the top portion 23p of the convex portion 23 is the lateral direction). Except for the point (existing at one end or the other end of Y), it is the same as the sweat absorbent sheet 20A shown in FIG. 7A, and does not include the configurations v and vi.

  As mentioned above, although embodiment of this invention was described, this invention is not restrict | limited to the said embodiment, It can change suitably. For example, in the said embodiment, although the vertical direction outer side end 21 of each of the sweat absorbing sheets 20 and 20A-20D was all linear form parallel to the horizontal direction Y, it contains a curve like the vertical direction inner side end 22. FIG. It may be configured, and its shape is not particularly limited. Further, the sweat absorbing sheet may have three or more convex portions. Further, the sweat absorbing sheet may be further disposed on the ventral side in addition to the back side. Moreover, in the said embodiment, although the underpants type disposable diaper was mentioned as one of the application examples of the absorbent article of this invention, in addition to what is called a deployment type disposable diaper which comprises a fastening tape, sanitary napkins, panty liners (Ori Sheet), incontinence pads, and the like.

  The following supplementary note (absorbent article) is further disclosed regarding the embodiment of the present invention described above.

<1> An absorptive main body is provided, which has a longitudinal direction corresponding to the wearer's front-rear direction and a transverse direction perpendicular to the wearer's longitudinal direction, and is arranged on the abdominal side portion and crotch portion arranged on the wearer's ventral side when worn An absorbent article having a crotch portion and a back side portion arranged on the back side in the longitudinal direction,
On both sides along the longitudinal direction of the absorbent main body, a pair of three-dimensional gathers having portions that stand toward the wearer's skin when worn are provided,
On the skin-facing surface of the absorbent main body in the dorsal side portion, an upright inhibiting portion is formed in which the solid gather is joined to the absorbent main body and the standing of the solid gather is inhibited, and the standing inhibition The part is disposed at least on the dorsal side and is covered with a sweat-absorbing sheet that contacts the wearer's skin and absorbs sweat,
The sweat-absorbing sheet has a longitudinal outer end extending in a lateral direction through a longitudinal outer side than a longitudinal end on the back side of the absorbent main body in a plan view, and the longitudinal outer end. Has a longitudinally inner end that is located on the opposite side of the longitudinal direction and extends in the lateral direction, and a part of the longitudinally inner end protrudes opposite to the longitudinally outer end side. Absorbent article having a plurality of.

<2> The sweat-absorbent sheet has a recess in the center in the lateral direction, in which a part of the inner end in the longitudinal direction is recessed toward the outer end in the longitudinal direction as compared with the peripheral portion in plan view. The absorbent article according to <1>.
<3> The distance between the top of the convex portion and the recessed portion adjacent thereto is preferably 5 mm or more, more preferably 10 mm or more, and preferably 70 mm or less, more preferably 60 mm or less, more specifically. Is preferably 10 to 50 mm, more preferably 20 to 40 mm, according to <2>.
<4> The longitudinal length of the sweat-absorbing sheet in the depression is preferably 30 mm or more, more preferably 40 mm or more, and preferably 90 mm or less, more preferably 80 mm or less, more specifically, preferably The absorbent article according to the above <2> or <3>, which is 40 to 80 mm, more preferably 50 to 70 mm.

<5> The absorbent article according to any one of <1> to <4>, wherein the convex portions are located on both sides of a virtual straight line that bisects the sweat-absorbent sheet in the lateral direction.
<6> The absorbent article according to any one of <1> to <5>, wherein the sweat-absorbent sheet has two convex portions.
<7> The absorbent article according to any one of <1> to <6>, wherein the standing inhibition portion is covered with the convex portion of the sweat-absorbent sheet.
<8> The absorbent article according to any one of <1> to <7>, wherein the convex portion is configured by a curve.
The top part of the <9> above-mentioned convex part is an absorptive article given in any 1 paragraph of the above <1>-<8> in which the whole is located in the transverse direction outside of the absorptive main part.
<10> Leg elastic members for forming leg gathers are arranged on both side portions along the vertical direction of the crotch part, and the sweat absorbing sheet is arranged so that the convex portions do not overlap the leg elastic members. The absorbent article according to any one of <1> to <9>.

<11> The absorbent main body is a liquid-permeable surface sheet that forms a skin-facing surface, liquid-impermeable or water-repellent that forms a non-skin-facing surface (hereinafter collectively referred to as liquid-impermeable). The absorptive article according to any one of <1> to <10>, further comprising: a back sheet and a liquid-retaining absorbent disposed between the two sheets.
<12> Further, any one of the items <1> to <11>, further including an exterior body positioned on the non-skin facing surface side (the back sheet side) of the absorbent main body and fixing the absorbent main body. An absorbent article according to any one of the above.
<13> The absorbent article according to <12>, wherein the exterior body includes a laminate of an outer layer sheet and an inner layer sheet.
<14> The absorbent article according to any one of <11> to <13>, wherein the absorbent body includes an absorbent core made of a water-absorbing polymer particle and a fiber material such as pulp fiber. .
<15> The absorbent article according to <14>, wherein the absorbent core is covered with a core wrap sheet.

<16> The absorbent article according to any one of <1> to <15>, wherein the three-dimensional gather is provided over substantially the entire length in the longitudinal direction of the absorbent main body.
<17> The three-dimensional gather is formed on a base wall portion where one side edge portion along the vertical direction stands toward the wearer's skin when worn, and on the one side edge portion (upper end portion) of the base wall portion. The <1> to <16> described in any one of <1> to <16>, wherein the elastic members are connected to each other, and the elastic members for forming a three-dimensional gather are arranged in an extended state along the longitudinal direction. Absorbent article.
<18> The three-dimensional gather is configured to include one side sheet having a constant width in the vertical direction, and the side sheet is formed on the base wall portion and one side edge portion (upper end portion) thereof. The absorbent according to <17>, wherein the elastic stretchable portion is folded so as to have a continuous shape, and the elastic stretchable portion has a two-layer structure in which one side sheet is folded. Goods.
<19> The absorbent article according to <18>, wherein the side sheet is formed of a water-repellent nonwoven fabric, a sheet made of a resin film, or a laminate of a nonwoven fabric and a resin film.

<20> In the standing inhibition portion (the standing inhibition portion on the back side portion), the three-dimensional gather is joined to the absorbent main body inward in the lateral direction from both side edges along the longitudinal direction of the absorbent main body. The absorbent article according to any one of <1> to <19>, which is formed by:
<21> On the skin-facing surface of the absorbent main body (skin-facing surface of the topsheet) in the ventral side, the three-dimensional gathers inward in the lateral direction from both side edges along the longitudinal direction of the absorbent main body. The absorbent article according to any one of <1> to <20>, wherein another standing-inhibiting part is formed in which the standing of the three-dimensional gather is inhibited by being bonded to the absorbent main body.
<22> The sweat absorbing sheet that covers the standing inhibition portion of the back side portion is disposed only on the back side portion, or on the back side portion and a portion near the back side portion of the crotch portion. Any one of the above items <1> to <21>, which is arranged only in the straddling portion (the portion located on the back side of the virtual straight line when the absorbent article is bisected in the longitudinal direction) The absorbent article as described.
<23> The absorbent article according to any one of <1> to <22>, wherein the standing inhibition portion is hydrophobic.

<24> The absorbent article according to any one of <1> to <23>, wherein the sweat absorbing sheet is smaller than the back side portion.
<25> The separation distance between the side edge along the longitudinal direction of the absorbent main body and the top of the convex portion located laterally outward of the side edge is preferably 5 mm or more, more preferably 15 mm or more, and The absorptivity according to any one of <1> to <24>, preferably 100 mm or less, more preferably 90 mm or less, more specifically preferably 20 to 70 mm, and more preferably 30 to 60 mm. Goods.
<26> The longitudinal length of the sweat absorbing sheet at the top of the convex portion is preferably 40 mm or more, more preferably 55 mm or more, and preferably 130 mm or less, more preferably 110 mm or less, more specifically, The absorbent article according to any one of <1> to <25>, preferably 55 to 110 mm, more preferably 70 to 100 mm.

<27> The absorbent article according to any one of <1> to <26>, wherein the sweat absorbing sheet is a hydrophilic fiber sheet.
<28> The absorbent article according to any one of <1> to <27>, wherein the sweat-absorbent sheet preferably includes hydrophilic fibers at 20 mass% or more, and more preferably 50 wt% or more.
<29> The absorbent article according to any one of <1> to <28>, wherein the sweat-absorbing sheet is composed of 100% by mass of hydrophilic fibers.
<30> The absorbent article according to any one of <1> to <28>, wherein the sweat-absorbent sheet includes hydrophilic fibers and hydrophobic fibers.
<31> basis weight of the sweat-absorbent sheet is preferably 10 g / m ² or more, more preferably 25 g / m ² or more, and preferably 90 g / m ² or less, more preferably 100 g / m ² or less, more specifically The absorbent article according to any one of <1> to <30>, preferably 25 to 90 g / m ² , more preferably 40 to 75 g / m ² .

<32> The absorbent article according to any one of <1> to <31>, wherein the sweat absorbing sheet has three or more convex portions.
<33> The absorbent article according to any one of <1> to <32>, wherein the sweat-absorbing sheet is further arranged on the ventral side part in addition to the back side part.
<34> The absorbent article according to any one of <1> to <33>, wherein the absorbent article is a pants-type disposable diaper.
<35> The absorbent article according to any one of <1> to <34>, wherein the absorbent article is a so-called deployable disposable diaper having a fastening tape, a sanitary napkin, a panty liner (orimono sheet), or an incontinence pad. Absorbent article as described in 1.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent main body 6 Exterior body 61 Outer layer sheet 62 Inner layer sheet 7 Three-dimensional gather 70 Base wall part 71 Elastic expansion-contraction part 72A, 72C Standing inhibition part 12 Leg elastic member 15 Side Sheet 20, 20A, 20B, 20C, 20D Sweat absorbing sheet 21 Longitudinal outer end 22 of sweat absorbing sheet Longitudinal inner end 23 of sweat absorbing sheet Convex portion 23p of sweat absorbing sheet Top 24 of convex portion of sweat absorbing sheet Side B Crotch C Back side

Claims (8)

Inseam provided with an absorptive main body, having a longitudinal direction corresponding to the wearer's front-rear direction and a transverse direction perpendicular to the wearer's front and back, arranged on the abdomen side of the wearer at the time of wearing, and on the crotch part An absorbent article having a back side portion arranged on the back side and the back side in the longitudinal direction,
On both sides along the longitudinal direction of the absorbent main body, a pair of three-dimensional gathers having an elastic stretchable part that stands up toward the wearer's skin when worn are provided,
On the skin-facing surface of the absorbent main body on the back side, the elastic stretchable part is joined to the absorbent main body to inhibit the elastic stretchable part, and the standing of the three-dimensional gather is inhibited. Further, a hydrophobic standing inhibition portion is formed, and the standing inhibition portion is disposed on at least the back side and is covered with a sweat absorbing sheet that contacts the wearer's skin and absorbs sweat.
The sweat-absorbing sheet has a longitudinal outer end extending in a lateral direction through a longitudinal outer side than a longitudinal end on the back side of the absorbent main body in a plan view, and the longitudinal outer end. Has a longitudinally inner end that is located on the opposite side of the longitudinal direction and extends in the lateral direction, and a part of the longitudinally inner end protrudes opposite to the longitudinally outer end side. Absorbent article having a plurality of.   2. The sweat-absorbent sheet has a hollow portion in the center in the horizontal direction in which a part of the inner end in the longitudinal direction is recessed toward the outer end in the longitudinal direction as compared with the peripheral portion in plan view. The absorbent article as described.   The absorptive article according to claim 1 or 2 in which said convex part is located in each of both sides across the virtual straight line which bisects the perspiration sheet in the transverse direction.   The absorbent article according to any one of claims 1 to 3, wherein the sweat-absorbent sheet has two convex portions.   The absorbent article according to any one of claims 1 to 4, wherein the standing inhibition portion is covered with the convex portion of the sweat-absorbent sheet.   The said convex part is an absorbent article as described in any one of Claims 1-5 comprised by the curve.   The top part of the said convex part is an absorbent article as described in any one of Claims 1-6 in which the whole is located in the horizontal direction outer side of the said absorptive main body.   Leg elastic members for leg gather formation are disposed on both side portions along the longitudinal direction of the crotch part, and the sweat absorbing sheet is disposed so that the convex portions do not overlap the leg elastic members. Item 8. The absorbent article according to any one of Items 1 to 7.

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