JP5997945B2 - Pants-type absorbent article - Google Patents

Pants-type absorbent article Download PDF

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JP5997945B2
JP5997945B2 JP2012131906A JP2012131906A JP5997945B2 JP 5997945 B2 JP5997945 B2 JP 5997945B2 JP 2012131906 A JP2012131906 A JP 2012131906A JP 2012131906 A JP2012131906 A JP 2012131906A JP 5997945 B2 JP5997945 B2 JP 5997945B2
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absorbent core
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width direction
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JP2013255573A (en
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了一 山本
了一 山本
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Kao Corp
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本発明は、パンツ型使い捨ておむつ等のパンツ型吸収性物品に関する。   The present invention relates to a pants-type absorbent article such as a pants-type disposable diaper.

従来、吸収性コアを含む縦長の吸収性本体と、該吸収性本体の非肌対向面側に配されて該吸収性本体を固定している外包体とを備えたパンツ型使い捨ておむつにおいて、おむつのずり落ち防止やフィット性、漏れ防止性の向上等の観点から、外包体におけるウエスト部や胴回り部に弾性伸縮性を付与したものが知られている。外包体に弾性伸縮性を付与する場合、実質的に非伸縮性の２枚のシート間に、伸長状態とした糸状又は帯状の弾性部材を接着剤を介して固定し、その弾性部材を収縮させてギャザーを形成する方法が一般的である。   Conventionally, in a pants-type disposable diaper comprising a vertically long absorbent main body including an absorbent core, and an outer package that is arranged on the non-skin-facing surface side of the absorbent main body and fixes the absorbent main body, From the standpoint of preventing slip-off, improving fit, and preventing leakage, and the like, elastic waist stretchability is imparted to the waist and waistline of the outer package. When elastic elasticity is imparted to the outer envelope, a stretched thread-like or belt-like elastic member is fixed between two substantially non-stretchable sheets via an adhesive, and the elastic member is contracted. A method of forming gathers is generally used.

また、本出願人は、先に、肌対向面を形成する表面シート、非肌対向面を形成する裏面シート及び両シート間に介在配置された吸収性コアを具備する吸収性物品において、該吸収性コアを、肌対向面からみた平面視において分立した複数の小吸収部により構成することを提案した（特許文献１参照）。斯かる構成の吸収体を用いることにより、十分な液体の吸収保持量を実現しつつ、柔軟性に富み、肌面の起伏にも極めて良好にフィットし、また動作に対する追従性が高く、着用感を大幅に良化することが可能となる。   In addition, the present applicant, in the absorbent article comprising a surface sheet that forms the skin facing surface, a back sheet that forms the non-skin facing surface, and an absorbent core disposed between both sheets, It has been proposed that the sex core is composed of a plurality of small absorbent parts separated in a plan view from the skin facing surface (see Patent Document 1). By using an absorbent body having such a configuration, it is possible to absorb and retain a sufficient amount of liquid, and it is highly flexible and fits very well to the undulations of the skin surface. Can be greatly improved.

特開２０１１−１３５９２１号公報JP 2011-135922 A

本出願人は、特許文献１に記載の吸収性物品（平面視において分立した複数の小吸収部により構成された吸収性コアを具備する吸収性物品）の更なる改良を図るべく種々検討した結果、吸収性コアを、該吸収性コアに形成された本体幅方向に延びる線状の幅方向溝部（本体長手方向に隣接する２個の小吸収部間の間隔）と、外包体における背側部に位置する外包体背側領域に配設された弾性部材との関係を考慮の上、適切に配置することにより、該吸収性物品の着用者の背側に対するフィット性を高め、背側からの漏れを一層効果的に防止し得ることを知見した。   As a result of various investigations to further improve the absorbent article described in Patent Document 1 (absorbent article having an absorbent core composed of a plurality of small absorbent parts separated in plan view) described in Patent Document 1. The absorbent core includes a linear widthwise groove portion (interval between two small absorbent portions adjacent in the longitudinal direction of the main body) formed in the absorbent core and a back side portion of the outer packet body. In consideration of the relationship with the elastic member disposed in the backside region of the outer envelope located at the position, the fit of the absorbent article to the backside of the wearer is improved, It has been found that leakage can be prevented more effectively.

従って本発明の課題は、着用者の背側に対するフィット性に優れ、背側からの漏れを効果的に防止し得るパンツ型吸収性物品を提供することにある。   Therefore, the subject of this invention is providing the underpants type absorbent article which is excellent in the fitting property with respect to a wearer's back side, and can prevent the leakage from a back side effectively.

本発明は、前記知見に基づきなされたもので、吸収性コアを含む縦長の吸収性本体と、該吸収性本体の非肌対向面側に配されて該吸収性本体を固定している外包体とを備え、着用時に着用者の腹側に配される腹側部及び背側に配される背側部を本体長手方向に有し、該外包体における該腹側部に位置する外包体腹側領域及び該背側部に位置する外包体背側領域それぞれの本体長手方向に沿う両側縁部どうしが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型吸収性物品であって、前記外包体は、シート材と、該シート材に固定された複数本の外包体形成用弾性部材とを含んで構成されており、前記外包体背側領域において、複数本の該外包体形成用弾性部材が、本体長手方向と直交する本体幅方向に伸長した状態で、本体長手方向に所定間隔を置いて配されており、前記吸収性コアにおける前記背側部に位置する吸収性コア背側領域に、本体幅方向に延びる線状の幅方向溝部が形成されており、前記外包体背側領域の前記外包体形成用弾性部材が、該吸収性コア背側領域を本体幅方向に横断しているパンツ型吸収性物品を提供することにより、前記課題を解決したものである。   The present invention has been made on the basis of the above knowledge, and has a vertically long absorbent main body including an absorbent core, and an outer package that is arranged on the non-skin facing surface side of the absorbent main body and fixes the absorbent main body. And an abdominal side that is disposed on the abdomen side of the wearer when worn and a back side part that is disposed on the back side of the body in the longitudinal direction of the body, A pair of side seal portions, a waist opening portion, and a pair of leg openings are formed by joining the side regions and the side edge portions along the longitudinal direction of the main body of each of the outer packet body back side regions located in the back side portion. In the pant-type absorbent article, the outer package includes a sheet material and a plurality of outer package forming elastic members fixed to the sheet material. A plurality of the outer-packet forming elastic members are orthogonal to the longitudinal direction of the main body. In a state of extending in the width direction, the main body is arranged at a predetermined interval in the longitudinal direction, and in the absorbent core back side region located in the back side portion of the absorbent core, a linear shape extending in the main body width direction Providing a pants-type absorbent article, in which a widthwise groove is formed, and the outer-packet forming elastic member in the outer bag back side region crosses the absorbent core back side region in the main body width direction. Thus, the problem is solved.

本発明のパンツ型吸収性物品は、着用者の背側に対するフィット性に優れ、背側からの漏れを効果的に防止し得る。   The underpants-type absorbent article of the present invention is excellent in fit to the wearer's back side and can effectively prevent leakage from the back side.

図１は、本発明のパンツ型吸収性物品の一実施形態であるパンツ型使い捨ておむつの一例を示す斜視図である。FIG. 1 is a perspective view showing an example of a pants-type disposable diaper that is an embodiment of a pants-type absorbent article of the present invention. 図２は、図１に示すおむつを各部の弾性部材を伸長させて平面状に拡げた展開状態を示す肌当接面側（表面シート側）の平面図である。FIG. 2 is a plan view on the skin contact surface side (surface sheet side) showing a developed state in which the diaper shown in FIG. 図３は、図１に示すおむつの分解斜視図である。FIG. 3 is an exploded perspective view of the diaper shown in FIG. 図４は、図２のＩ−Ｉ線断面（本体幅方向に沿う断面）を模式的に示す断面図である。4 is a cross-sectional view schematically showing a cross section taken along the line II of FIG. 2 (a cross section along the width direction of the main body). 図５は、図２のＩＩ−ＩＩ線断面（本体長手方向に沿う断面）を模式的に示す断面図である。5 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. 2 (a cross section along the longitudinal direction of the main body). 図６は、図１に示すおむつにおける吸収性コアと外包体形成用弾性部材との位置関係を説明する図（図２相当図）である。FIG. 6 is a diagram (corresponding to FIG. 2) for explaining the positional relationship between the absorbent core and the elastic member for forming the outer envelope in the diaper shown in FIG. 図７は、図１に示すおむつの着用状態における背側部を模式的に示す断面図（図４相当図）である。FIG. 7 is a cross-sectional view (corresponding to FIG. 4) schematically showing the back side portion in the wearing state of the diaper shown in FIG.

以下、本発明のパンツ型吸収性物品を、その好ましい一実施形態であるパンツ型使い捨ておむつに基づき図面を参照して説明する。本実施形態のパンツ型使い捨ておむつ１は、図１〜図５に示すように、吸収性コア５を含む縦長の吸収性本体２と、該吸収性本体２の非肌対向面側に配されて該吸収性本体２を固定している外包体３とを備え、着用時に着用者の腹側に配される腹側部Ａ及び背側に配される背側部Ｂ並びにそれらの間に位置し着用者の股間部に配される股下部Ｃを本体長手方向Ｘに有し、外包体３における腹側部Ａに位置する外包体腹側領域（後述する腹側シート部材３１）及び背側部Ｂに位置する外包体背側領域（後述する背側シート部材３２）それぞれの本体長手方向Ｘに沿う両側縁部３ｓ，３ｓどうしが接合されて一対のサイドシール部Ｓ，Ｓ、ウエスト開口部ＷＯ及び一対のレッグ開口部ＬＯ，ＬＯが形成されている。   Hereinafter, the underpants type absorbent article of the present invention is explained with reference to drawings based on the underpants type disposable diaper which is the preferred embodiment. As shown in FIGS. 1 to 5, the pants-type disposable diaper 1 of the present embodiment is disposed on the vertically long absorbent main body 2 including the absorbent core 5 and the non-skin facing surface side of the absorbent main body 2. And an outer envelope 3 that fixes the absorbent main body 2, and is located between the abdominal side A disposed on the abdomen side of the wearer and the back side B disposed on the back side when worn, and between them. An outer body belly side region (abdominal side sheet member 31 described later) and a back side part having a crotch part C arranged in the crotch part of the wearer in the longitudinal direction X of the main body and located in the abdominal side part A of the outer body 3 A pair of side seal portions S, S and a waist opening WO are formed by joining the side edge portions 3s, 3s along the longitudinal direction X of the main body of the outer package back side region (back side seat member 32 described later) located in B. And a pair of leg openings LO, LO are formed.

尚、本明細書において、肌対向面は、パンツ型吸収性物品及びその構成部材（例えば吸収性本体、吸収性コア）における着用時に着用者の肌側に向けられる面であり、非肌対向面は、パンツ型吸収性物品及びその構成部材における着用時に着用者の肌側とは反対側（ショーツ等の着衣側）に向けられる面である。また、本体長手方向は、縦長の吸収性本体の長手方向であり、本体幅方向は、該本体長手方向と直交する方向である。   In the present specification, the skin facing surface is a surface that faces the wearer's skin when worn on the pant-type absorbent article and its constituent members (for example, an absorbent main body, an absorbent core), and is a non-skin facing surface. Is a surface directed to the side opposite to the skin side of the wearer (clothing side such as shorts) when worn on the pant-type absorbent article and its constituent members. Moreover, the main body longitudinal direction is the longitudinal direction of the vertically long absorbent main body, and the main body width direction is a direction orthogonal to the main body longitudinal direction.

吸収性本体２は、該吸収性本体２の肌対向面を形成する液透過性の表面シート２１、該吸収性本体２の非肌対向面を形成する液不透過性又は液難透過性の裏面シート２２、及び両シート２１，２２間に介在配置された液保持性の吸収体２３を含んで構成されており、Ｘ方向に長い矩形形状に形成されている。吸収体２３は、パルプ繊維等の繊維の集合体を主体とする吸収性コア５と、該吸収性コア５を被覆するコアラップシート（図示せず）とを含んで構成されている。吸収性コア５には、必要に応じ吸水性ポリマーの粒子が含有される。表面シート２１、裏面シート２２及び吸収体２３は、何れもＸ方向に長い矩形形状であり、表面シート２１及び裏面シート２２が、吸収体２３の長手方向Ｘの両端それぞれから長手方向Ｘの外方に延出した部分において接合され、Ｘ方向に長い矩形形状の吸収性本体２が形成される。   The absorbent main body 2 includes a liquid-permeable surface sheet 21 that forms the skin-facing surface of the absorbent main body 2, and a liquid-impermeable or liquid-impermeable back surface that forms the non-skin-facing surface of the absorbent main body 2. The sheet 22 and the liquid-retaining absorbent 23 disposed between the sheets 21 and 22 are included, and are formed in a rectangular shape that is long in the X direction. The absorbent body 23 includes an absorbent core 5 mainly composed of an aggregate of fibers such as pulp fibers, and a core wrap sheet (not shown) that covers the absorbent core 5. The absorbent core 5 contains water-absorbing polymer particles as necessary. The top sheet 21, the back sheet 22, and the absorber 23 are all rectangular shapes that are long in the X direction, and the top sheet 21 and the back sheet 22 are outward in the longitudinal direction X from both ends in the longitudinal direction X of the absorber 23. The absorbent main body 2 having a rectangular shape that is long in the X direction is joined at the portion extending in the X direction.

図２及び図４に示すように、吸収性本体２の肌対向面における本体長手方向Ｘに沿う左右両側部には、本体長手方向Ｘに沿って一対の立体ギャザー４，４が配されている。各立体ギャザー４は、着用時に少なくとも股下部Ｃにおいて、着用者の肌側に向かって起立する。各立体ギャザー４は、液抵抗性ないし撥水性の立体ギャザー形成用シート材４１と、該シート材４１に固定された立体ギャザー形成用弾性部材４２とを含んで構成されている。シート材４１は、１枚の帯状シートから形成されており、該シート材４１の本体幅方向Ｙの一端部は、吸収性本体２の吸収体２３と裏面シート２２との間に配され、接着剤（図示せず）によって固定され、該シート材４１の本体幅方向Ｙの他端部は、吸収体２３の上方において、本体長手方向Ｘに延びる折曲線（図示せず）にて本体幅方向Ｙの外方側に折り返され、その折り返しによって相対向したシート間に、弾性部材４２が本体長手方向Ｘに伸長した状態で接着剤を介して固定されて、立体ギャザー４が形成されている。   As shown in FIGS. 2 and 4, a pair of three-dimensional gathers 4, 4 are arranged along the body longitudinal direction X on the left and right sides along the body longitudinal direction X on the skin facing surface of the absorbent body 2. . Each three-dimensional gather 4 stands up toward the wearer's skin side at least in the crotch C when worn. Each three-dimensional gather 4 includes a liquid-resistant or water-repellent three-dimensional gather forming sheet material 41 and a three-dimensional gather forming elastic member 42 fixed to the sheet material 41. The sheet material 41 is formed from a single belt-like sheet, and one end portion of the sheet material 41 in the main body width direction Y is disposed between the absorbent body 23 and the back sheet 22 of the absorbent main body 2 and bonded. The other end of the sheet material 41 in the body width direction Y is fixed by an agent (not shown), and the other end of the sheet material 41 in the body width direction is above the absorber 23 by a folding line (not shown) extending in the body longitudinal direction X. The three-dimensional gather 4 is formed by folding the elastic member 42 between the sheets which are folded outwardly of Y and opposed to each other by the folding in a state where the elastic member 42 extends in the longitudinal direction X of the main body.

外包体３は、シート材３５，３６と、該シート材３５，３６に固定された複数本の外包体形成用弾性部材３３とを含んで構成されている。本実施形態における外包体３は、図１〜図３に示すように、着用時に着用者の腹側に配される腹側シート部材３１と背側に配される背側シート部材３２とに分割されている。即ち、本実施形態のパンツ型使い捨ておむつ１は、着用者の腹側に配される腹側シート部材３１（外包体腹側領域）と、着用者の背側に配される背側シート部材３２（外包体背側領域）と、両シート部材３１，３２に架け渡して固定された縦長の吸収性本体２とを備え、両シート部材３１，３２それぞれの本体長手方向Ｘに沿う両側縁部３ｓ，３ｓどうしが接合されて一対のサイドシール部Ｓ，Ｓ、ウエスト開口部ＷＯ及び一対のレッグ開口部ＬＯ，ＬＯが形成されている。サイドシール部Ｓでは、腹側シート部材３１と背側シート部材３２とが、接着剤、ヒートシール、高周波シール、超音波シール等の公知の接合手段によって接合されている。   The outer package 3 includes sheet materials 35 and 36 and a plurality of outer member forming elastic members 33 fixed to the sheet materials 35 and 36. As shown in FIGS. 1 to 3, the outer packaging body 3 in the present embodiment is divided into an abdominal sheet member 31 disposed on the abdomen side of the wearer when worn and a back sheet member 32 disposed on the back side. Has been. That is, the pants-type disposable diaper 1 of the present embodiment includes an abdominal sheet member 31 (external body ventral region) disposed on the wearer's ventral side and a dorsal sheet member 32 disposed on the wearer's dorsal side. (Exterior body back side region) and a vertically long absorbent main body 2 that is fixed over both sheet members 31 and 32, both side edges 3s along the main body longitudinal direction X of both sheet members 31 and 32 , 3s are joined together to form a pair of side seal portions S, S, a waist opening WO, and a pair of leg openings LO, LO. In the side seal portion S, the ventral sheet member 31 and the dorsal sheet member 32 are joined by a known joining means such as an adhesive, a heat seal, a high frequency seal, and an ultrasonic seal.

腹側シート部材３１及び背側シート部材３２は、それぞれ、その非肌対向面（おむつ１の外面）を形成する外層シート材３５と、該外層シート材３５の内面側に配された内層シート材３６と、両シート材３５，３６間に接着剤（図示せず）により固定された複数本の糸状又は帯状の弾性部材３３とを含んで構成されており、図２に示す如きおむつ１の展開状態において、本体幅方向Ｙに長い矩形形状をなしている。両シート材３５，３６間は、所定部位において接着剤（図示せず）によって接合されている。腹側シート部材３１及び背側シート部材３２においては、それぞれ図２に示すように、複数本の弾性部材３３は、本体幅方向Ｙに沿って略直線状に配され、本体幅方向Ｙに伸長した状態で、本体長手方向Ｘに所定間隔を置いて配されている。   The abdominal sheet member 31 and the back sheet member 32 are respectively an outer layer sheet material 35 that forms a non-skin facing surface (the outer surface of the diaper 1), and an inner layer sheet material arranged on the inner surface side of the outer layer sheet material 35. 36 and a plurality of thread-like or belt-like elastic members 33 fixed between the sheet members 35 and 36 with an adhesive (not shown), and the development of the diaper 1 as shown in FIG. In the state, it has a long rectangular shape in the main body width direction Y. The two sheet members 35 and 36 are joined to each other at a predetermined portion by an adhesive (not shown). In the ventral seat member 31 and the back seat member 32, as shown in FIG. 2, the plurality of elastic members 33 are arranged substantially linearly along the body width direction Y and extend in the body width direction Y. In this state, they are arranged at a predetermined interval in the longitudinal direction X of the main body.

外層シート材３５は、図３に示すように、その本体幅方向Ｙの長さは内層シート材３６のそれと同じであるが、本体長手方向Ｘの長さは内層シート材３６のそれよりも長く、そのため、外層シート材３５は、両シート材３５，３６をそれらの本体長手方向Ｘの内方端３５ｂ，３６ｂが一致するように積層させた場合に、内層シート材３６の本体長手方向Ｘの外方端３６ａから本体長手方向Ｘの外方へ延出する、延出部３５Ｅを有している。腹側シート部材３１及び背側シート部材３２の外層シート材３５の延出部３５Ｅは、それぞれ図２及び図５に示すように、内層シート材３６側に折り返されており、その折り返しによって相対向したシート３５（３５Ｅ），３６間に、吸収性本体２の本体長手方向Ｘの端部が配されている。相対向するシート３５（３５Ｅ），３６間は、所定の部位において接着剤（図示せず）によって接合されている。   As shown in FIG. 3, the outer layer sheet material 35 has the same length in the main body width direction Y as that of the inner layer sheet material 36, but the length of the main body length direction X is longer than that of the inner layer sheet material 36. Therefore, when the outer layer sheet material 35 is laminated such that the inner ends 35b and 36b of the main body longitudinal direction X coincide with each other, the outer layer sheet material 35 is aligned in the main body longitudinal direction X of the inner layer sheet material 36. An extending portion 35 </ b> E that extends outward in the main body longitudinal direction X from the outer end 36 a is provided. The extending portions 35E of the outer layer sheet material 35 of the ventral sheet member 31 and the back sheet member 32 are folded back toward the inner layer sheet material 36 as shown in FIGS. 2 and 5, respectively. Between the sheet | seats 35 (35E) and 36 which were made, the edge part of the main body longitudinal direction X of the absorptive main body 2 is distribute | arranged. The sheets 35 (35E) and 36 facing each other are joined to each other by an adhesive (not shown) at a predetermined portion.

腹側部Ａ（腹側シート部材３１）及び背側部Ｂ（背側シート部材３２）それぞれにおけるウエスト部Ｄには、外層シート材３５と内層シート材３６との間に弾性部材３３が伸長状態で固定されていることによって、ウエストギャザーが形成されている。腹側部Ａのウエスト部Ｄの弾性部材３３及び背側部Ｂのウエスト部Ｄの弾性部材３３は、図３に示すように、腹側部Ａ又は背側部Ｂの本体幅方向Ｙの全長に亘って連続的に延びており、その全体に亘って本来有する伸縮性を発現可能になされている。ウエスト部Ｄは、着用者の腰回りに位置する部位であり、通常、おむつ１の腹側部Ａにおける本体長手方向Ｘの外方端１ａ及びおむつ１の背側部Ｂにおける本体長手方向Ｘの外方端１ｂそれぞれから該おむつ１の本体長手方向Ｘの全長の１〜１５％の長さまでの領域である。   The elastic member 33 extends between the outer layer sheet material 35 and the inner layer sheet material 36 at the waist portion D in each of the ventral side portion A (belt side seat member 31) and the back side portion B (back side seat member 32). The waist gathers are formed by being fixed by. As shown in FIG. 3, the elastic member 33 of the waist part D of the ventral part A and the elastic member 33 of the waist part D of the back part B are the full length of the body width direction Y of the ventral part A or the back part B, as shown in FIG. It extends continuously over the entire length, and the stretchability inherent in the whole can be expressed. The waist part D is a part located around the waist of the wearer. Usually, the outer end 1a of the body longitudinal direction X in the abdominal side A of the diaper 1 and the body longitudinal direction X of the back side B of the diaper 1 are arranged. It is an area | region from 1 to 15% of the full length of the main body longitudinal direction X of this diaper 1 from each outer end 1b.

また、腹側部Ａ（腹側シート部材３１）及び背側部Ｂ（背側シート部材３２）それぞれにおける胴回り部Ｅには、外層シート材３５と内層シート材３６との間に弾性部材３３が伸長状態で固定されていることによって、胴回りギャザーが形成されている。腹側部Ａの胴回り部Ｅは、図２に示すようにおむつ１を、その各部の弾性部材を伸長させて平面状に拡げた展開状態とし、腹側部Ａを上側、背側部Ｂを下側と考えた場合に、ウエスト部Ｄよりも下方に位置し且つ股下部Ｃよりも上方に位置する領域である。背側部Ｂの胴回り部Ｅは、おむつ１を図２に示すものとは上下逆にした場合に、腹側部Ａにおける胴回り部Ｅと略同位置にある領域である。   In addition, an elastic member 33 is provided between the outer layer sheet material 35 and the inner layer sheet material 36 at the waist portion E in each of the ventral side part A (belt side sheet member 31) and the back side part B (back side sheet member 32). By being fixed in the extended state, a waistline gather is formed. As shown in FIG. 2, the waistline E of the abdominal side A has the diaper 1 in an expanded state in which the elastic members of the respective parts are extended to expand in a plane, the abdominal side A is the upper side, and the back side B is When considered as the lower side, it is an area located below the waist part D and above the crotch part C. The waistline portion E of the back side portion B is a region that is substantially in the same position as the waistline portion E of the ventral side portion A when the diaper 1 is turned upside down from that shown in FIG.

本実施形態においては、腹側部Ａ（腹側シート部材３１）の胴回り部Ｅの弾性部材３３は、図３に示すように、吸収性本体２（吸収性コア５）と重なる部分に、該弾性部材３３の伸縮性の発現が抑制された非伸縮部３４を有しており、それによって部分的に伸縮性の発現が抑えられている。腹側部Ａの胴回り部Ｅの弾性部材３３においては、非伸縮部３４は伸縮しないが、非伸縮部３４以外の他の部分（吸収性本体２の本体幅方向Ｙの外方に位置する部分）は伸縮する。従って、腹側部Ａの胴回り部Ｅにおいては、吸収性本体２の配置領域を除く、本体長手方向Ｘに沿う左右両側部に、一対の胴回りギャザーが形成されている。   In the present embodiment, the elastic member 33 of the waistline E of the ventral side A (belt side sheet member 31) is overlapped with the absorbent main body 2 (absorbent core 5) as shown in FIG. The elastic member 33 has a non-stretchable portion 34 in which the development of stretchability is suppressed, and thereby the stretchability is partially suppressed. In the elastic member 33 of the waist part E of the abdominal side A, the non-stretchable part 34 does not stretch, but other parts other than the non-stretchable part 34 (parts located outside the body width direction Y of the absorbent main body 2) ) Expands and contracts. Accordingly, in the waistline E of the abdominal side A, a pair of waistline gathers is formed on the left and right sides along the body longitudinal direction X, excluding the arrangement region of the absorbent body 2.

このように、弾性部材３３が吸収性本体２（吸収性コア５）と重なる部分に非伸縮部３４を有していることにより、吸収性本体２に縦皺を生じさせることなく吸収性本体２の本体長手方向Ｘの端部を着用者の身体に沿わせることが可能となり、それによって、漏れが効果的に防止されると共に、吸収性本体２に生じた皺の頂部が肌に当たることに起因する跡付き等の不都合が効果的に防止される。非伸縮部３４の形成方法としては、この種の使い捨ておむつにおいて通常用いられている方法を特に制限無く用いることができ、例えば、弾性部材３３を細かく分断して伸縮しないようにする方法、あるいは接着剤等を用いた接合によって弾性部材３３が伸縮しないようにする方法等が挙げられる。   As described above, the elastic member 33 has the non-stretchable portion 34 at a portion where the elastic member 33 overlaps the absorbent main body 2 (absorbent core 5), so that the absorbent main body 2 does not cause vertical wrinkles. It is possible to allow the end of the body in the longitudinal direction X to follow the wearer's body, thereby effectively preventing leakage and causing the top of the heel produced in the absorbent body 2 to hit the skin Inconveniences such as marking are effectively prevented. As a method for forming the non-stretchable portion 34, a method usually used in this type of disposable diaper can be used without any particular limitation. For example, a method of finely dividing the elastic member 33 so as not to expand or contract, or bonding For example, a method of preventing the elastic member 33 from expanding and contracting by bonding using an agent or the like.

一方、背側部Ｂ（背側シート部材３２）の胴回り部Ｅの弾性部材３３は、図３に示すように、腹側部Ａ及び背側部Ｂのウエスト部Ｄの弾性部材３３と同様に、背側部Ｂの本体幅方向Ｙの全長に亘って連続的に延びており、その全体に亘って本来有する伸縮性を発現可能になされている。   On the other hand, the elastic member 33 of the waist part E of the back side part B (back side sheet member 32) is similar to the elastic member 33 of the waist part D of the abdominal side part A and the back side part B as shown in FIG. It extends continuously over the entire length in the main body width direction Y of the back side portion B, and is capable of expressing the inherent stretchability over the entire length.

吸収体２３を構成する吸収性コア５について説明すると、図５及び図６に示すように、吸収性コア５における背側部Ｂに位置する吸収性コア背側領域５２には、本体幅方向Ｙに延びる線状の幅方向溝部６が形成されており、背側シート部材３２（外包体背側領域）の弾性部材３３が吸収性コア背側領域５２を本体幅方向Ｙに横断している。   The absorbent core 5 constituting the absorbent body 23 will be described. As shown in FIGS. 5 and 6, the absorbent core back side region 52 located on the back side B of the absorbent core 5 has a main body width direction Y. A linear widthwise groove portion 6 extending in the width direction is formed, and the elastic member 33 of the back sheet member 32 (outer package back side region) crosses the absorbent core back side region 52 in the body width direction Y.

本実施形態においては、幅方向溝部６は、図６に示すように、背側部Ｂ（吸収性コア背側領域５２）のみならず、腹側部Ａ（吸収性コア５における腹側部Ａに位置する吸収性コア腹側領域５１）及び股下部Ｃ（吸収性コア５における股下部Ｃに位置する吸収性コア股下領域５３）にも形成されており、吸収性コア５の各領域５１〜５３それぞれの本体幅方向Ｙの中央部に、本体長手方向Ｘに所定間隔をおいて複数本形成されている。吸収性コア腹側領域５１には、該吸収性コア腹側領域５１を本体幅方向Ｙに横断する弾性部材３３と同数（本実施形態では６本）の幅方向溝部６が形成されており、また、吸収性コア背側領域５２には、該吸収性コア背側領域５２を本体幅方向Ｙに横断する弾性部材３３と同数（本実施形態では６本）の幅方向溝部６が形成されている。   In the present embodiment, as shown in FIG. 6, the width direction groove portion 6 includes not only the back side portion B (absorbent core back side region 52) but also the ventral side portion A (abdominal side portion A in the absorbent core 5). Are formed in the absorbent core ventral region 51) and the crotch part C (the absorbent core crotch region 53 located in the crotch part C of the absorbent core 5). A plurality of 53 are formed at a central portion in the main body width direction Y with a predetermined interval in the main body longitudinal direction X. In the absorbent core ventral region 51, the same number (6 in the present embodiment) of width direction grooves 6 as the elastic members 33 crossing the absorbent core ventral region 51 in the main body width direction Y are formed. Further, the same number (6 in the present embodiment) of width direction grooves 6 as the elastic members 33 crossing the absorbent core back side region 52 in the body width direction Y are formed in the absorbent core back side region 52. Yes.

本実施形態においては、複数本の幅方向溝部６は、それぞれ図５に示すように、吸収性コア５の一面側（非肌対向面側、裏面シート２２との対向面側）が他面側（肌対向面側、表面シート２１との対向面側）に向けて凹陥してなる線状の凹部からなる。ここで、「線状」とは、溝部（凹陥部）の形状が図６に示す如き平面視において直線に限られず、曲線を含み、各線は、連続線でも破線でも良い。本実施形態においては、複数本の幅方向溝部６は、それぞれ図６に示すように、本体幅方向Ｙに延びる連続直線状である。   In the present embodiment, as shown in FIG. 5, each of the plurality of widthwise grooves 6 has one side of the absorbent core 5 (the non-skin facing side, the side facing the back sheet 22) on the other side. It consists of a linear recessed part recessed toward (the skin facing surface side, the facing surface side with the surface sheet 21). Here, “linear” means that the shape of the groove portion (concave portion) is not limited to a straight line in a plan view as shown in FIG. 6, and includes a curved line, and each line may be a continuous line or a broken line. In the present embodiment, each of the plurality of widthwise grooves 6 is a continuous straight line extending in the main body width direction Y, as shown in FIG.

また、本実施形態においては、図６に示すように、吸収性コア背側領域５２には、本体幅方向Ｙに延びる線状の幅方向溝部６が本体長手方向Ｘに所定間隔をおいて複数本形成されていると共に、本体長手方向Ｘに延びる線状の長手方向溝部７が本体幅方向Ｙに所定間隔をおいて複数本（本実施形態では６本）形成されている。複数本の長手方向溝部７は、それぞれ幅方向溝部６と同様に、吸収性コア５の一面側（非肌対向面側、裏面シート２２との対向面側）が他面側（肌対向面側、表面シート２１との対向面側）に向けて凹陥してなる線状の凹部からなる。複数本の長手方向溝部７は、それぞれ図６に示すように、吸収性コア腹側領域５１（腹側部Ａ）から吸収性コア股下領域５３（股下部Ｃ）を通って吸収性コア背側領域５２（背側部Ｂ）に亘って連続的に延びる連続直線状であり、吸収性コア５の本体幅方向Ｙの中央部に形成されている。   In the present embodiment, as shown in FIG. 6, the absorbent core back region 52 includes a plurality of linear widthwise groove portions 6 extending in the main body width direction Y at predetermined intervals in the main body longitudinal direction X. A plurality of linear longitudinal grooves 7 extending in the main body longitudinal direction X are formed at a predetermined interval in the main body width direction Y (six in this embodiment). In the plurality of longitudinal grooves 7, as in the widthwise grooves 6, one surface side of the absorbent core 5 (non-skin facing surface side, facing surface side with the back sheet 22) is the other surface side (skin facing surface side). , And is formed of a linear recess that is recessed toward the surface facing the topsheet 21). As shown in FIG. 6, the plurality of longitudinal grooves 7 are formed on the dorsal side of the absorbent core from the absorbent core ventral region 51 (abdominal side A) through the absorbent core crotch region 53 (crotch C). It is a continuous straight line extending continuously over the region 52 (back side portion B), and is formed at the center of the absorbent core 5 in the body width direction Y.

このように、吸収性コア５には、その非肌対向面（裏面シート２２との対向面）側に本体幅方向Ｙに延びる幅方向溝部６と本体長手方向に延びる長手方向溝部７とがそれぞれ複数本形成されており、これら複数本の溝部６，７によって、図６に示すように、吸収性コア５の各領域５１〜５３の本体幅方向Ｙの中央部が多数の区画領域８に区画化されている。各区画領域８は、格子状に形成された溝部６，７の格子の目の部分に相当し、図６に示す如き平面視において四角形形状をなしている。   Thus, the absorbent core 5 has a widthwise groove portion 6 extending in the body width direction Y and a lengthwise groove portion 7 extending in the body longitudinal direction on the non-skin facing surface (facing surface facing the back sheet 22). A plurality of grooves 6, 7 are formed, and the central part in the body width direction Y of each region 51 to 53 of the absorbent core 5 is partitioned into a number of partition regions 8 by the plurality of grooves 6, 7 as shown in FIG. 6. It has become. Each partition region 8 corresponds to a lattice portion of the grooves 6 and 7 formed in a lattice shape, and has a quadrangular shape in plan view as shown in FIG.

吸収性コア５において、区画領域８（溝部６，７が形成されていない部位）は、パルプ繊維等の吸収性コア形成材料が溝部６，７の形成部位に比して多い、高坪量部からなり、溝部６，７の形成部位は、吸収性コア形成材料が区画領域８に比して少ない、低坪量部からなる。ここで、「溝部の形成部位」とは、吸収性コア５において、線状の凹部からなる溝部６，７の、該凹部の底部を形成している部位であり、溝部６については、図５中符号６０で示す部位である。即ち、線状の凹部からなる溝部６，７は、それぞれ、吸収性コア５の厚み方向において「溝部の形成部位」（低坪量部）と同位置にある、空間部である。   In the absorbent core 5, the partition region 8 (part where the groove parts 6 and 7 are not formed) has a high basis weight part in which the absorbent core forming material such as pulp fibers is larger than the part where the groove parts 6 and 7 are formed. The formation part of the groove parts 6 and 7 consists of a low basic weight part in which the absorptive core forming material is less than the partition region 8. Here, the “formation part of the groove part” is a part of the absorbent core 5 that forms the bottom part of the concave part of the groove parts 6 and 7 formed of linear concave parts. This is the part indicated by the middle symbol 60. That is, each of the groove portions 6 and 7 formed of linear recesses is a space portion at the same position as the “groove portion forming portion” (low basis weight portion) in the thickness direction of the absorbent core 5.

区画領域８（高坪量部）は溝部６，７の形成部位（低坪量部）に比して厚みが大きく（図５参照）、そのため、吸収性コア５は、区画領域８が溝部６，７の形成部位に比して隆起した凹凸構造を有している。吸収性コア５がこのような凹凸構造を有していると、凹凸構造を有しておらず肌対向面及び非肌対向面の何れも略平坦な場合に比して、おむつ１の着用時に吸収性コア５（吸収体２３）の変形が誘導され易く、おむつ１の着用者の身体に対するフィット性が向上する。   The partition region 8 (high basis weight portion) is thicker than the portion where the groove portions 6 and 7 are formed (low basis weight portion) (see FIG. 5). Therefore, the absorbent core 5 has the partition region 8 in the groove portion 6. , 7 has a concavo-convex structure raised as compared with the formation site. When the absorbent core 5 has such a concavo-convex structure, it has no concavo-convex structure and the diaper 1 is worn compared to the case where both the skin facing surface and the non-skin facing surface are substantially flat. The deformation of the absorbent core 5 (absorber 23) is easily induced, and the fit of the diaper 1 to the wearer's body is improved.

また、図５に示す如き吸収性コア５の断面視において、溝部６，７の形成部位（低坪量部）は、吸収性コア５の厚み方向に偏在している。より具体的には、溝部６，７の形成部位（溝部６については図５中符号６０で示す部位）は、図５に示すように、吸収性コア５の厚み方向（図５の上下方向）において、肌対向面（表面シート２１との対向面）側に偏在している。そして、溝部６，７の形成部位がこのように吸収性コア５の厚み方向において肌対向面側に偏在していることにより、区画領域８（高坪量部）は、吸収性コア５の非肌対向面（裏面シート２２との対向面）側に突出している。従って、吸収性コア５においては、該吸収性コア５の肌対向面は、実質的に凹凸が無く略平坦であるのに対し、該吸収性コア５の非肌対向面は、突出形成された区画領域８（高坪量部）とこれを包囲するように形成された溝部６，７とによる凹凸を有している。   Further, in the cross-sectional view of the absorbent core 5 as shown in FIG. 5, the formation portions (low basis weight portions) of the grooves 6 and 7 are unevenly distributed in the thickness direction of the absorbent core 5. More specifically, as shown in FIG. 5, the forming part of the groove parts 6 and 7 (the part indicated by the reference numeral 60 in FIG. 5 for the groove part 6) is the thickness direction of the absorbent core 5 (up and down direction in FIG. 5). , The skin is unevenly distributed on the skin facing surface (facing surface with the topsheet 21) side. And since the formation site | part of the groove parts 6 and 7 is unevenly distributed in the skin opposing surface side in the thickness direction of the absorptive core 5 in this way, the division area | region 8 (high basic weight part) is the non-absorptivity of the absorptive core 5. It protrudes to the skin facing surface (the surface facing the back sheet 22). Therefore, in the absorbent core 5, the skin facing surface of the absorbent core 5 is substantially flat with no unevenness, whereas the non-skin facing surface of the absorbent core 5 is formed to protrude. It has unevenness due to the partition region 8 (high basis weight portion) and the groove portions 6 and 7 formed so as to surround it.

溝部６，７は、吸収性コア５にエンボス加工（熱を伴うか又は伴わないエンボスあるいは超音波エンボス等）を施すことによって形成された、いわゆるエンボス溝ではなく、積繊装置を用いた公知の吸収性コアの製造方法において、パルプ繊維等の吸収性コア形成材料の積繊量を部分的に異ならせることによって形成されたものである。この公知の吸収性コアの製造方法は、空気流に乗せて供給した吸収性コア形成材料を、積繊装置（回転ドラム等）の外面に形成された集積用凹部の底部に吸引堆積させる方法である。斯かる吸収性コアの製造方法（吸収性コア形成材料の積繊方法）において、集積用凹部の底部の開孔率を部分的に異ならせる等して、該凹部の吸引力を部分的に異ならせることにより、吸収性コア形成材料の積繊量を部分的に異ならせることが可能となり、そうして得られた吸収性コア５において、該積繊量が相対的に少ない部位が、線状の凹部からなる溝部６，７の形成部位（低坪量部）となり、該積繊量が相対的に多い部位が、区画領域８をはじめとする、溝部６，７の形成部位以外の部位（高坪量部）となる。   The groove portions 6 and 7 are not so-called embossed grooves formed by embossing (such as embossing with or without heat or ultrasonic embossing) on the absorbent core 5, but a known fiber stacking device is used. In the manufacturing method of an absorptive core, it forms by making the amount of piles of absorptive core forming materials, such as a pulp fiber, partially differ. This known method for manufacturing an absorbent core is a method in which an absorbent core forming material supplied in an air stream is sucked and deposited on the bottom of an accumulation recess formed on the outer surface of a fiber stacking device (such as a rotating drum). is there. In such an absorbent core manufacturing method (absorbing method of absorbent core forming material), the suction force of the recesses is partially different, for example, by partially changing the opening ratio of the bottom of the accumulation recesses. By making it possible, it becomes possible to make the amount of accumulated fibers of the absorbent core-forming material partially different. In the absorbent core 5 obtained in this way, the portion where the amount of accumulated fibers is relatively small is linear. The portions where the groove portions 6 and 7 formed of the recesses are formed (low basis weight portions), and the portion where the amount of the accumulated fiber is relatively large is a portion other than the formation portions of the groove portions 6 and 7 including the partition region 8 ( High basis weight part).

本実施形態のパンツ型使い捨ておむつ１の主たる特長の１つとして、図５及び図６に示すように、背側シート部材３２（外包体背側領域）の弾性部材３３が、本体幅方向Ｙに延びる線状の幅方向溝部６を有する吸収性コア背側領域５２を、本体幅方向Ｙに横断している点が挙げられる。本実施形態においては、背側シート部材３２の胴回り部Ｅ（図２参照）に配されている複数本（６本）の弾性部材３３の全てが、吸収性コア背側領域５２を本体幅方向Ｙに横断している。   As one of the main features of the pants-type disposable diaper 1 of the present embodiment, as shown in FIGS. 5 and 6, the elastic member 33 of the back side sheet member 32 (outer package back side region) is arranged in the body width direction Y. The point which crosses the absorptive core back side area | region 52 which has the linear width direction groove part 6 extended in the main body width direction Y is mentioned. In the present embodiment, all of the plural (six) elastic members 33 arranged in the waistline E (see FIG. 2) of the back seat member 32 define the absorbent core back side region 52 in the body width direction. Crossing Y.

図５及び図６に示すように、おむつ１の自然状態あるいは展開状態において、背側シート部材３２の複数本の弾性部材３３のうちの少なくとも1本は、本体長手方向Ｘにおいて吸収性コア背側領域５２の幅方向溝部６と同位置にある。本実施形態においては、背側シート部材３２の胴回り部Ｅに配されている複数本（６本）の弾性部材３３の全てが、吸収性コア背側領域５２の複数本（６本）の幅方向溝部６と本体長手方向Ｘにおいて同位置にあり、背側部Ｂにおいて、複数本の弾性部材３３と複数本の幅方向溝部６とが１対１で対応している。   5 and 6, when the diaper 1 is in a natural state or in an unfolded state, at least one of the plurality of elastic members 33 of the back seat member 32 is the back side of the absorbent core in the body longitudinal direction X. The region 52 is located at the same position as the widthwise groove 6. In the present embodiment, all of the plurality (six) of elastic members 33 arranged in the waistline E of the back side seat member 32 are the width of the plurality (six) of the absorbent core back side region 52. The directional groove 6 and the main body longitudinal direction X are in the same position, and in the back side B, the plurality of elastic members 33 and the plurality of width direction grooves 6 correspond one-to-one.

本実施形態のおむつ１は、斯かる特長的な構成を具備していることにより、着用者の背側に対するフィット性に優れ、背側からの漏れを効果的に防止することができる。即ち、おむつ１を常法通りに着用した場合、その着用状態においては、図７に示すように、背側部Ｂにおいては、吸収性コア背側領域５２を本体幅方向Ｙに横断している弾性部材３３の収縮力により、吸収性コア背側領域５２が着用者の肌１００側へ強く押圧され、それによって、吸収性本体２の肌対向面（表面シート２１）が肌１００にフィット性良く密着した状態となる。そのため、例えば、おむつ１の着用者が仰向けに寝ている状態で尿等の排泄液を股下部Ｃに排泄した場合に、その排泄液が表面シート２等を伝って本体長手方向Ｘに沿って背側部Ｂ側に流れてきても、弾性部材３３の収縮力によって肌１００にフィット性良く密着している吸収性本体２によって、排泄液は堰き止められ、排泄液の本体長手方向Ｘへの移動が抑制されるため、背側からの漏れを効果的に防止することができる。また、おむつ１によれば、斯かる吸収性本体２による液の堰き止め効果により、便の拡がりが効果的に抑制されるため、漏れが効果的に防止される。   The diaper 1 of this embodiment is excellent in the fitting property with respect to a wearer's back side by having such a characteristic structure, and can prevent the leakage from a back side effectively. That is, when the diaper 1 is worn as usual, in the worn state, as shown in FIG. 7, the back side portion B crosses the absorbent core back side region 52 in the body width direction Y. The absorbent core back side region 52 is strongly pressed toward the wearer's skin 100 by the contraction force of the elastic member 33, whereby the skin facing surface (surface sheet 21) of the absorbent main body 2 has good fit to the skin 100. It will be in close contact. Therefore, for example, when excretion fluid such as urine is excreted in the crotch C while the wearer of the diaper 1 is lying on his back, the excretion fluid travels along the surface sheet 2 and the like along the longitudinal direction X of the main body. Even if it flows to the dorsal side B side, the excretory fluid is blocked by the absorbent main body 2 that is in close contact with the skin 100 due to the contraction force of the elastic member 33, and the excretory fluid is moved in the longitudinal direction X of the main body. Since the movement is suppressed, leakage from the back side can be effectively prevented. Moreover, according to the diaper 1, since the spreading of the stool is effectively suppressed by the liquid blocking effect by the absorbent main body 2, leakage is effectively prevented.

特に本実施形態においては、図５及び図６に示すように、背側シート部材３２（外包体背側領域）の複数本の弾性部材３３のうちの少なくとも1本が、本体長手方向Ｘにおいて吸収性コア背側領域５２の幅方向溝部６と同位置にあるため、おむつ１の着用状態において、図７に示すように、収縮した弾性部材３３が、それと本体長手方向Ｘにおいて同位置にある幅方向溝部６内に入り込み、幅方向溝部６の形成部位６０（低坪量部）を着用者の肌１００側へ強く押圧する。このような、吸収性コア５の低坪量部を介しての肌１００側への押圧力は、高坪量部である区画領域８を介しての肌１００側への押圧力に比して強力であるため、前述した漏れ防止効果が一層確実に奏される。   Particularly, in the present embodiment, as shown in FIGS. 5 and 6, at least one of the plurality of elastic members 33 of the back side seat member 32 (outer package back side region) absorbs in the longitudinal direction X of the main body. The width of the contracted elastic member 33 in the same position in the body longitudinal direction X as shown in FIG. It enters into the direction groove portion 6 and strongly presses the formation site 60 (low basis weight portion) of the width direction groove portion 6 toward the skin 100 side of the wearer. Such a pressing force to the skin 100 side through the low basis weight portion of the absorbent core 5 is compared with a pressing force to the skin 100 side through the partition region 8 which is a high basis weight portion. Since it is strong, the above-described leakage prevention effect is more reliably exhibited.

前述した作用効果をより確実に奏させるようにする観点から、おむつ１の各部の寸法等は次のように設定することが好ましい。
幅方向溝部６の幅Ｗ１（図５参照）は、好ましくは１ｍｍ以上、更に好ましくは２ｍｍ以上、そして、好ましくは２０ｍｍ以下、更に好ましくは１０ｍｍ以下、より具体的には、好ましくは１〜２０ｍｍ、更に好ましくは２〜１０ｍｍである。長手方向溝部７の幅は、幅方向溝部６の幅Ｗ１と同様に設定することができる。
本体長手方向Ｘに隣接する２本の幅方向溝部６，６の間隔Ｗ２（図６参照）は、好ましくは５ｍｍ以上、更に好ましくは１０ｍｍ以上、そして、好ましくは３０ｍｍ以下、更に好ましくは２５ｍｍ以下、より具体的には、好ましくは５〜３０ｍｍ、更に好ましくは１０〜２５ｍｍである。本体幅方向Ｙに隣接する２本の長手方向溝部７，７の間隔Ｗ３（図６参照）は、好ましくは３ｍｍ以上、更に好ましくは８ｍｍ以上、そして、好ましくは３０ｍｍ以下、更に好ましくは２５ｍｍ以下、より具体的には、好ましくは３〜３０ｍｍ、更に好ましくは８〜２５ｍｍである。また、２本の幅方向溝部６，６の間隔Ｗ２と長手方向溝部７，７の間隔Ｗ３は同様の寸法に設定することができる。
弾性部材３３の直径Ｒと幅方向溝部６の幅Ｗ１との比（Ｒ／Ｗ１）は、好ましくは０．００４〜０．０５、更に好ましくは０．００５〜０．０４である。 From the viewpoint of ensuring the above-described effects, the dimensions and the like of each part of the diaper 1 are preferably set as follows.
The width W1 (see FIG. 5) of the widthwise groove 6 is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably 10 mm or less, more specifically preferably 1 to 20 mm, More preferably, it is 2-10 mm. The width of the longitudinal groove portion 7 can be set similarly to the width W1 of the width direction groove portion 6.
The interval W2 (see FIG. 6) between the two widthwise grooves 6 and 6 adjacent to the longitudinal direction X of the main body is preferably 5 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, More specifically, it is preferably 5 to 30 mm, and more preferably 10 to 25 mm. The interval W3 (see FIG. 6) between the two longitudinal grooves 7, 7 adjacent to the body width direction Y is preferably 3 mm or more, more preferably 8 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, More specifically, it is preferably 3 to 30 mm, and more preferably 8 to 25 mm. Further, the interval W2 between the two widthwise grooves 6, 6 and the interval W3 between the longitudinal grooves 7, 7 can be set to the same size.
The ratio (R / W1) between the diameter R of the elastic member 33 and the width W1 of the widthwise groove 6 is preferably 0.004 to 0.05, more preferably 0.005 to 0.04.

吸収性コア背側領域５２（背側部Ｂ）における幅方向溝部６の本数は、好ましくは３本以上、更に好ましくは５本以上、そして、好ましくは２０本以下、更に好ましくは１５本以下、より具体的には、好ましくは３〜２０本、更に好ましくは５〜１５本である。吸収性コア腹側領域５１（腹側部Ａ）における幅方向溝部６の本数は、吸収性コア背側領域５２（背側部Ｂ）における幅方向溝部６の本数と同様に設定することができる。
吸収性コア背側領域５２（背側部Ｂ）における長手方向溝部７の本数は、好ましくは３本以上、更に好ましくは５本以上、そして、好ましくは１０本以下、更に好ましくは７本以下、より具体的には、好ましくは３〜１０本、更に好ましくは３〜７本である。吸収性コア腹側領域５１（腹側部Ａ）及び吸収性コア股下領域５３（股下部Ｃ）における長手方向溝部７の本数は、吸収性コア背側領域５２（背側部Ｂ）における長手方向溝部７の本数と同様に設定することができる。 The number of width direction grooves 6 in the absorbent core back region 52 (back side portion B) is preferably 3 or more, more preferably 5 or more, and preferably 20 or less, more preferably 15 or less, More specifically, the number is preferably 3 to 20, more preferably 5 to 15. The number of width direction grooves 6 in the absorbent core ventral region 51 (ventral side A) can be set similarly to the number of width direction grooves 6 in the absorbent core dorsal region 52 (back side B). .
The number of longitudinal grooves 7 in the absorbent core back region 52 (back side portion B) is preferably 3 or more, more preferably 5 or more, and preferably 10 or less, more preferably 7 or less, More specifically, the number is preferably 3 to 10, more preferably 3 to 7. The number of longitudinal grooves 7 in the absorbent core ventral region 51 (ventral side A) and the absorbent core crotch region 53 (crotch lower part C) is the longitudinal direction in the absorbent core dorsal region 52 (back side B). It can be set similarly to the number of the groove portions 7.

吸収性コア５における区画領域８（高坪量部）の坪量Ｓ１は、好ましくは２００ｇ／ｍ2以上、更に好ましくは３００ｇ／ｍ2以上、そして、好ましくは９００ｇ／ｍ2以下、更に好ましくは８００ｇ／ｍ2以下、より具体的には、好ましくは２００〜９００ｇ／ｍ2、更に好ましくは３００〜８００ｇ／ｍ2である。
吸収性コア５における線状の凹部からなる溝部６，７の形成部位（低坪量部。溝部６については図５中符号６０で示す部位。）の坪量Ｓ２は、好ましくは１０ｇ／ｍ2以上、更に好ましくは５０ｇ／ｍ2以上、そして、好ましくは５００ｇ／ｍ2以下、更に好ましくは４００ｇ／ｍ2以下、より具体的には、好ましくは１０〜５００ｇ／ｍ2、更に好ましくは５０〜４００ｇ／ｍ2である。
溝部６，７の形成部位（低坪量部）の坪量Ｓ２は、区画領域８（高坪量部）の坪量Ｓ１に対しての割合（Ｓ２／Ｓ１）が，その下限値が好ましくは１％であり、更に好ましくは３％であり、上限値は好ましくは８０％であり、更に好ましくは７０％である。
線状の凹部からなる溝部６，７の深さは、好ましくは１．５ｍｍ以上、更に好ましくは３ｍｍ以上、そして、好ましくは１４ｍｍ以下、更に好ましくは１０ｍｍ以下、より具体的には、好ましくは１．５〜１４ｍｍ、更に好ましくは３〜１０ｍｍである。
区画領域（高坪量部）の坪量Ｓ１及び溝部６，７の形成部位（低坪量部）の坪量Ｓ２並びに溝部６，７の深さは、それぞれ、以下のようにして測定される。 The basis weight S1 of the partition region 8 (high basis weight part) in the absorbent core 5 is preferably 200 g / m 2 or more, more preferably 300 g / m 2 or more, and preferably 900 g / m 2 or less, more preferably. 800 g / m 2 or less, and more specifically, preferably 200~900g / m 2, more preferably a 300 to 800 g / m 2.
The basis weight S2 of the formation part (low basic weight part. The part shown by the code | symbol 60 in FIG. 5 about the groove part 6) of the groove parts 6 and 7 which consist of a linear recessed part in the absorptive core 5 becomes like this. Preferably it is 10 g / m < 2 >. or more, more preferably 50 g / m 2 or more, and preferably 500 g / m 2 or less, more preferably 400 g / m 2 or less, more specifically, preferably 10 to 500 g / m 2, more preferably 50 to 400 g / m 2 .
As for the basis weight S2 of the formation part (low basis weight part) of the groove parts 6 and 7, the ratio (S2 / S1) to the basis weight S1 of the partition region 8 (high basis weight part) is preferably the lower limit value. 1%, more preferably 3%, and the upper limit is preferably 80%, more preferably 70%.
The depth of the groove portions 6 and 7 formed of linear recesses is preferably 1.5 mm or more, more preferably 3 mm or more, and preferably 14 mm or less, more preferably 10 mm or less, more specifically preferably 1 5 to 14 mm, more preferably 3 to 10 mm.
The basis weight S1 of the partition area (high basis weight portion), the basis weight S2 of the formation site (low basis weight portion) of the groove portions 6 and 7, and the depth of the groove portions 6 and 7 are measured as follows. .

＜坪量の測定方法＞
測定対象物（吸収性コア５）における区画領域８（高坪量部）と溝部６，７の形成部位（低坪量部）との境界線に沿って、フェザー社製の片刃剃刀を用いて、区画領域８（高坪量部）の小片を切り出す。切り出された区画領域８（高坪量部）の小片について、重量を電子天秤（Ａ＆Ｄ社製電子天秤ＧＲ−３００、精度：小数点以下４桁）を用いて測定する。求めた重量を区画領域８（高坪量部）の小片の面積で除して小片の坪量を算出する。小片５個の坪量の平均を区画領域８（高坪量部）の坪量とする。
また、区画領域８（高坪量部）と溝部６，７の形成部位（低坪量部）との境界線に沿って、フェザー社製の片刃剃刀を用いて、細いストライプ状の溝部６，７の形成部位（低坪量部）の小片を切り出す。この溝部６，７の形成部位（低坪量部）の小片の切り出し作業において、本体長手方向Ｘの切断長さは５０ｍｍとし、本体幅方向Ｙの切断幅は、溝部６，７の形成部位（低坪量部）の幅の設計寸法に合わせる。切り出された溝部６，７の形成部位（低坪量部）の小片について、重量を電子天秤（Ａ＆Ｄ社製電子天秤ＧＲ−３００、精度：小数点以下４桁）を用いて測定する。求めた重量を溝部６，７の形成部位（低坪量部）の小片の面積で除して小片の坪量を算出する。小片５個の坪量の平均を溝部６，７の形成部位（低坪量部）の坪量とする。 <Measurement method of basis weight>
A single-edged razor manufactured by Feather Corporation is used along the boundary line between the partition region 8 (high basis weight portion) and the formation portion (low basis weight portion) of the grooves 6 and 7 in the measurement object (absorbent core 5). Then, a small piece of the partition region 8 (high basis weight portion) is cut out. About the small piece of the division area 8 (high basic weight part) cut out, a weight is measured using the electronic balance (A & D company electronic balance GR-300, accuracy: 4 digits below a decimal point). The basis weight of the small piece is calculated by dividing the obtained weight by the area of the small piece of the partition region 8 (high basis weight portion). Let the average of the basic weight of five small pieces be the basic weight of the division area 8 (high basic weight part).
In addition, along the boundary line between the partition region 8 (high basis weight portion) and the site where the groove portions 6 and 7 are formed (low basis weight portion), a thin striped groove portion 6, using a single blade razor manufactured by Feather Corporation. Cut out a small piece of 7 forming part (low basis weight part). In the cutting operation of a small piece of the groove portions 6 and 7 (low basis weight portion), the cutting length in the main body longitudinal direction X is 50 mm, and the cutting width in the main body width direction Y is the forming portion of the groove portions 6 and 7 ( Match the design dimensions of the width of the low basis weight. About the small piece of the formation site | part (low basic weight part) of the cut-out groove parts 6 and 7, weight is measured using the electronic balance (A & D company electronic balance GR-300, accuracy: 4 digits below a decimal point). The basis weight of the small piece is calculated by dividing the obtained weight by the area of the small piece at the site where the groove portions 6 and 7 are formed (low basis weight portion). The average of the basis weights of the five small pieces is defined as the basis weight of the formation site (low basis weight part) of the groove parts 6 and 7.

＜溝部の深さの測定方法＞
測定対象物（吸収性コア５）を所定のサイズにカットして測定サンプルを得、該測定サンプルの測定箇所（溝部６，７）及びその周辺領域を５ｋＰａで１０分間加圧し、除重後すぐに以下の方法で、測定箇所における溝部６，７の深さの測定を行う。測定箇所は、測定サンプル１枚あたり３点以上とし、測定サンプル２枚（測定箇所６点以上）の平均を溝部６，７の深さとする。例えば測定サンプルを、フェザー社製刃剃刀で、図２に示す本体長手方向Ｘ又は本体幅方向Ｙに切断し、この切断されたサンプルの断面について、溝部６，７の深さを測定する。肉眼にて測定し難い場合には、前記切断されたサンプルの断面を、例えば、マイクロスコープ（ＫＥＹＥＮＣＥ社製ＶＨＸ−１０００）を用いて２０〜１００倍の倍率で観察し、その拡大断面について測定してもよい。 <Measurement method of groove depth>
The measurement object (absorbent core 5) is cut into a predetermined size to obtain a measurement sample, and the measurement location (grooves 6 and 7) and the peripheral area of the measurement sample are pressurized at 5 kPa for 10 minutes, and immediately after dehumidification In addition, the depth of the grooves 6 and 7 at the measurement location is measured by the following method. The number of measurement points is 3 or more per measurement sample, and the average of 2 measurement samples (6 or more measurement points) is the depth of the grooves 6 and 7. For example, a measurement sample is cut in a main body longitudinal direction X or a main body width direction Y shown in FIG. 2 with a blade razor manufactured by Feather, and the depths of the groove portions 6 and 7 are measured with respect to the cross section of the cut sample. When it is difficult to measure with the naked eye, the cross section of the cut sample is observed at a magnification of 20 to 100 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE), and the enlarged cross section is measured. May be.

おむつ１の形成材料について説明すると、吸収性本体２を構成する表面シート２１、裏面シート２２及び吸収体２３（吸収性コア５、コアラップシート）、外包体３を構成する外層シート材３５及び内層シート材３６、並びに立体ギャザー４を形成するシート材４１としては、それぞれ、通常、使い捨ておむつ等の吸収性物品に用いられるものであれば、特に制限なく用いることができる。例えば、表面シート２１としては、親水性且つ液透過性の不織布等を用いることができ、裏面シート２２としては、液不透過性又は撥水性の樹脂フィルムや樹脂フィルムと不織布の積層体等を用いることができる。吸収性コアの形成材料としては、パルプ繊維等の繊維材料や粒子状等の各種形状の吸水性ポリマーを用いることができ、コアラップシートとしては、ティッシュペーパー等の紙や各種不織布、開孔フィルム等の液透過性のシートを用いることができる。外層シート材３５及び内層シート材３６としては、エアスルー不織布、スパンレース不織布、スパンボンド不織布、メルトブローン不織布等の不織布を用いることができる。立体ギャザー４を形成するシート材４１としては、伸縮性のフィルム、不織布、織物又はそれらの積層シート等を用いることができる。   The forming material of the diaper 1 will be described. The top sheet 21, the back sheet 22 and the absorber 23 (absorbent core 5, core wrap sheet) constituting the absorbent main body 2, the outer layer sheet material 35 and the inner layer constituting the outer package 3. The sheet material 36 and the sheet material 41 forming the three-dimensional gather 4 can be used without particular limitation as long as they are usually used for absorbent articles such as disposable diapers. For example, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 21, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 22. be able to. As a material for forming the absorbent core, fiber materials such as pulp fibers and water-absorbing polymers having various shapes such as particles can be used. As a core wrap sheet, paper such as tissue paper, various nonwoven fabrics, and apertured films can be used. A liquid-permeable sheet such as can be used. As the outer layer sheet material 35 and the inner layer sheet material 36, non-woven fabrics such as an air-through nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, and a melt blown nonwoven fabric can be used. As the sheet material 41 that forms the three-dimensional gather 4, a stretchable film, a nonwoven fabric, a woven fabric, or a laminated sheet thereof can be used.

外包体形成用弾性部材３３及び立体ギャザー形成用弾性部材４２としては、例えば、天然ゴム、ポリウレタン、ポリスチレン−ポリイソプレン共重合体、ポリスチレン−ポリブタジエン共重合体、アクリル酸エチル−エチレン等のポリエチレン−αオレフィン共重合体等からなる糸状又は帯状の伸縮性材料を用いることができる。   Examples of the envelope forming elastic member 33 and the three-dimensional gather forming elastic member 42 include polyethylene-α such as natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, and ethyl acrylate-ethylene. A thread-like or belt-like stretchable material made of an olefin copolymer or the like can be used.

以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記実施形態に制限されない。例えば、前記実施形態においては、幅方向溝部６及び長手方向溝部７は、それぞれ、吸収性コア５の一面（非肌対向面）側が他面（肌対向面）側に向けて凹陥してなる線状の凹部から形成されていたが、吸収性コア５を厚み方向に貫通する線状の貫通孔（図示せず）から形成されていても良い。また、両溝部６，７のうちの一方が線状の凹部から形成され、他方が線状の貫通孔から形成されていても良い。幅方向溝部６が線状の貫通孔から形成されている場合、図７に示す如きおむつ１の着用状態において、収縮した弾性部材３３は、それと本体長手方向Ｘにおいて同位置にある該貫通孔（幅方向溝部６）内に入り込み、該貫通孔の肌対向面側（表面シート２１側）の開孔端を被覆する、表面シート２１を、着用者の肌１００側へ強く押圧する。斯かる場合でも、前記実施形態と同様の効果が奏される。   As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the said embodiment, the width direction groove part 6 and the longitudinal direction groove part 7 are each the line | wire which the one surface (non-skin opposing surface) side of the absorptive core 5 is dented toward the other surface (skin opposing surface) side. However, it may be formed from a linear through hole (not shown) that penetrates the absorbent core 5 in the thickness direction. Further, one of the groove portions 6 and 7 may be formed from a linear recess, and the other may be formed from a linear through hole. When the widthwise groove 6 is formed from a linear through hole, the elastic member 33 contracted in the wearing state of the diaper 1 as shown in FIG. The surface sheet 21 that enters the widthwise groove 6) and covers the opening end of the through hole on the skin facing surface side (surface sheet 21 side) is strongly pressed toward the skin 100 side of the wearer. Even in such a case, the same effects as those of the above-described embodiment can be obtained.

また、前記実施形態においては、吸収性コア背側領域５２を本体幅方向Ｙに横断する複数本の弾性部材３３の全てが、該吸収性コア背側領域５２の複数本の幅方向溝部６と本体長手方向Ｘにおいて同位置にあり、背側部Ｂにおいて、複数本の弾性部材３３と複数本の幅方向溝部６とが１対１で対応していたが、本発明においては、背側シート部材３２（外包体背側領域）の弾性部材３３が吸収性コア背側領域５２を本体幅方向Ｙに横断していれば良く、前記実施形態に制限されない。例えば、１）吸収性コア背側領域５２を本体幅方向Ｙに横断する複数本の弾性部材３３の全てが、該吸収性コア背側領域５２の複数本の幅方向溝部６と本体長手方向Ｘにおいて同位置に無くても良く、あるいは２）弾性部材３３と幅方向溝部６とが本体長手方向Ｘにおいて同位置にある箇所と、弾性部材３３と幅方向溝部６とが本体長手方向Ｘにおいて同位置に無い箇所とが、背側部Ｂに混在していても良い。   Moreover, in the said embodiment, all the several elastic members 33 which cross the absorptive core back side area | region 52 to the main body width direction Y are the multiple width direction groove parts 6 of this absorptive core back side area | region 52. At the same position in the longitudinal direction X of the main body, the plurality of elastic members 33 and the plurality of widthwise grooves 6 correspond one-to-one in the back side B, but in the present invention, the back side seat The elastic member 33 of the member 32 (outer package back side region) only needs to cross the absorbent core back side region 52 in the main body width direction Y, and is not limited to the above embodiment. For example, 1) All of the plurality of elastic members 33 crossing the absorbent core back side region 52 in the main body width direction Y are connected to the plurality of width direction grooves 6 of the absorbent core back side region 52 and the main body longitudinal direction X. 2) The location where the elastic member 33 and the width direction groove portion 6 are in the same position in the main body longitudinal direction X and the position where the elastic member 33 and the width direction groove portion 6 are the same in the main body longitudinal direction X. The location which is not in the position may be mixed in the back side portion B.

また、前記実施形態においては、外包体３が腹側シート部材３１と背側シート部材３２とに分割されており、吸収性本体２が両シート部材３１，３２に架け渡して固定されていたが、本発明のパンツ型吸収性物品は、斯かる構成に限定されず、例えば、外包体が、腹側部と背側部とで分割されずに、腹側部、股下部及び背側部に亘る砂時計状等の外包体であっても良い。   Moreover, in the said embodiment, although the outer package 3 was divided | segmented into the abdominal sheet member 31 and the back | dorsal sheet member 32, the absorptive main body 2 was spanned over both the sheet members 31 and 32, and was fixed. The pant-type absorbent article of the present invention is not limited to such a configuration. For example, the outer package is not divided into the abdominal part and the dorsal part, but the abdominal part, the crotch part, and the dorsal part. It may be an hourglass-like outer covering.

また、前記実施形態においては、腹側部Ａ（腹側シート部材３１）の胴回り部Ｅの弾性部材３３は、吸収性本体２（吸収性コア５）と重なる部分に、該弾性部材３３の伸縮性の発現が抑制された非伸縮部３４を有していたが、背側部Ｂ（背側シート部材３２）の胴回り部Ｅの弾性部材３３と同様に、非伸縮部３４を有さずに、腹側部Ａの本体幅方向Ｙの全長に亘って連続的に延び、その全体に亘って本来有する伸縮性を発現可能になされていても良い。その場合、前述したように、吸収性コア腹側領域５１は吸収性コア背側領域５２と同様に構成されているため、おむつ１は、着用者の背側のみならず、腹側に対するフィット性にも優れ、腹側からの漏れも効果的に防止することができるものとなる。   Moreover, in the said embodiment, the elastic member 33 of the waist part E of the abdominal side part A (abdominal side sheet member 31) is the expansion-contraction of this elastic member 33 in the part which overlaps with the absorptive main body 2 (absorbent core 5). Although the non-stretchable portion 34 in which the expression of the property is suppressed is included, the non-stretchable portion 34 is not provided, similarly to the elastic member 33 of the waistline portion E of the back side portion B (back side sheet member 32). Moreover, it may extend continuously over the entire length of the body width direction Y of the abdominal side portion A, and may be capable of expressing the inherent stretchability over the entire length. In that case, as above-mentioned, since the absorptive core ventral region 51 is comprised similarly to the absorptive core back region 52, the diaper 1 fits not only a wearer's back side but the ventral side. In addition, leakage from the ventral side can be effectively prevented.

前記実施形態に関し、更に以下の付記（パンツ型吸収性物品）を開示する。   The following additional notes (pants-type absorbent article) are further disclosed with respect to the embodiment.

＜１＞ 吸収性コアを含む縦長の吸収性本体と、該吸収性本体の非肌対向面側に配されて該吸収性本体を固定している外包体とを備え、着用時に着用者の腹側に配される腹側部及び背側に配される背側部を本体長手方向に有し、該外包体における該腹側部に位置する外包体腹側領域及び該背側部に位置する外包体背側領域それぞれの本体長手方向に沿う両側縁部どうしが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型吸収性物品であって、
前記外包体は、シート材と、該シート材に固定された複数本の外包体形成用弾性部材とを含んで構成されており、前記外包体背側領域において、複数本の該外包体形成用弾性部材が、本体長手方向と直交する本体幅方向に伸長した状態で、本体長手方向に所定間隔を置いて配されており、
前記吸収性コアにおける前記背側部に位置する吸収性コア背側領域に、本体幅方向に延びる線状の幅方向溝部が形成されており、前記外包体背側領域の前記外包体形成用弾性部材が、該吸収性コア背側領域を本体幅方向に横断しているパンツ型吸収性物品。 <1> A vertically long absorbent main body including an absorbent core, and an outer package that is arranged on the non-skin-facing surface side of the absorbent main body and fixes the absorbent main body. An abdominal region located on the side and a dorsal side portion disposed on the back side in the longitudinal direction of the main body, and located on the abdominal side region and the back side portion located on the abdominal side of the outer packet body A pants-type absorbent article in which both side edges along the longitudinal direction of the main body of the outer package back side region are joined to each other to form a pair of side seal parts, a waist opening part, and a pair of leg opening parts,
The outer package includes a sheet material and a plurality of elastic members for forming an outer packet fixed to the sheet material, and a plurality of the outer packets for forming the outer packet are formed in the outer package back side region. The elastic member is arranged at a predetermined interval in the main body longitudinal direction with the elastic member extending in the main body width direction orthogonal to the main body longitudinal direction,
A linear widthwise groove extending in the width direction of the main body is formed in the absorbent core dorsal region located in the dorsal side portion of the absorbent core, and the outer package forming elasticity of the outer package dorsal region is formed. A pants-type absorbent article in which a member crosses the absorbent core back region in the body width direction.

＜２＞ 前記吸収性本体は、該吸収性本体の肌対向面を形成する液透過性の表面シート、該吸収性本体の非肌対向面を形成する液不透過性又は液難透過性の裏面シート、及び両シート間に介在配置された液保持性の吸収体を含んで構成されている前記＜１＞記載のパンツ型吸収性物品。
＜３＞ 前記外包体腹側領域及び前記外包体背側領域は、それぞれ、その非肌対向面を形成する外層シート材と、該外層シート材の内面側に配された内層シート材と、両シート材間に接着剤により固定された複数本の糸状又は帯状の前記外包体形成用弾性部材とを含んで構成されている前記＜１＞又は＜２＞記載のパンツ型吸収性物品。
＜４＞ 前記外包体形成用弾性部材は、伸長状態で前記両シート材間に固定されている前記＜３＞記載のパンツ型吸収性物品。 <2> The absorbent main body is a liquid-permeable surface sheet that forms a skin-facing surface of the absorbent main body, and a liquid-impermeable or liquid-impermeable surface that forms a non-skin-facing surface of the absorbent main body. The underpants-type absorbent article according to the above <1>, comprising a sheet and a liquid-retaining absorbent disposed between the sheets.
<3> The outer envelope ventral region and the outer envelope dorsal region are respectively an outer layer sheet material forming the non-skin facing surface, an inner layer sheet material disposed on the inner surface side of the outer layer sheet material, The underpants-type absorbent article according to the above <1> or <2>, comprising a plurality of thread-like or belt-like elastic members for forming an outer envelope fixed between sheet materials with an adhesive.
<4> The pants-type absorbent article according to <3>, wherein the elastic member for forming an outer envelope is fixed between the two sheet members in an extended state.

＜５＞ 前記外包体背側領域の複数本の前記外包体形成用弾性部材のうちの少なくとも1本は、本体長手方向において前記幅方向溝部と同位置にある前記＜１＞〜＜４＞の何れか１に記載のパンツ型吸収性物品。
＜６＞ 前記外包体背側領域の胴回り部に配されている複数本の前記外包体形成用弾性部材の全てが、前記吸収性コア背側領域の複数本の前記幅方向溝部と本体長手方向において同位置にある前記＜１＞〜＜５＞の何れか１に記載のパンツ型吸収性物品。
＜７＞ 前記背側部において、複数本の前記外包体形成用弾性部材と複数本の前記幅方向溝部とが１対１で対応している前記＜１＞〜＜６＞の何れか１に記載のパンツ型吸収性物品。
＜８＞ 前記外包体形成用弾性部材と前記幅方向溝部とが本体長手方向において同位置にある箇所と、該外包体形成用弾性部材と該幅方向溝部とが本体長手方向において同位置に無い箇所とが、前記背側部に混在している前記＜１＞〜＜５＞の何れか１に記載のパンツ型吸収性物品。 <5> At least one of the plurality of outer-packet forming elastic members in the outer-packer dorsal region is located at the same position as the widthwise groove in the longitudinal direction of the main body. The underpants type absorbent article according to any one of the above.
<6> All of the plurality of outer-packet-forming elastic members arranged in the waistline portion of the outer packet back side region are the plurality of widthwise grooves and the longitudinal direction of the main body of the absorbent core back side region. The underpants-type absorbent article according to any one of <1> to <5>, which is in the same position.
<7> In any one of the above items <1> to <6>, in the back side portion, the plurality of elastic members for forming the outer envelope body and the plurality of widthwise groove portions correspond one-to-one. The underpants type absorbent article as described.
<8> The outer-packet-forming elastic member and the width-direction groove are in the same position in the main body longitudinal direction, and the outer-packet-forming elastic member and the width-direction groove are not in the same position in the main body longitudinal direction. The underpants-type absorbent article according to any one of <1> to <5>, wherein a portion is mixed in the back side portion.

＜９＞ 前記幅方向溝部は、前記吸収性コアの一面側が他面側に向けて凹陥してなる線状の凹部からなる前記＜１＞〜＜８＞の何れか１に記載のパンツ型吸収性物品。
＜１０＞ 前記幅方向溝部は、前記吸収性コアの非肌対向面側（前記裏面シートとの対向面側）が肌対向面側（前記表面シートとの対向面側）に向けて凹陥している前記＜９＞記載のパンツ型吸収性物品。
＜１１＞ 前記吸収性コアにおいて、前記幅方向溝部が形成されていない部位（幅方向溝部非形成部）は、吸収性コア形成材料が該幅方向溝部の形成部位に比して多い、高坪量部からなり、該幅方向溝部の形成部位は、吸収性コア形成材料が該幅方向溝部非形成部に比して少ない、低坪量部からなる前記＜９＞又は＜１０＞記載のパンツ型吸収性物品。
＜１２＞ 前記幅方向溝部は、前記吸収性コアを厚み方向に貫通する線状の貫通孔からなる前記＜１＞〜＜８＞の何れか１に記載のパンツ型吸収性物品。 <9> The pants-type absorption according to any one of <1> to <8>, wherein the widthwise groove portion is formed by a linear recess in which one surface side of the absorbent core is recessed toward the other surface side. Sex goods.
<10> In the width direction groove portion, the non-skin facing surface side (the facing surface side to the back sheet) of the absorbent core is recessed toward the skin facing surface side (the facing surface side to the top sheet). The pants-type absorbent article according to <9>.
<11> In the absorbent core, the portion where the widthwise groove portion is not formed (widthwise groove portion non-formed portion) is a high basis weight in which the absorbent core forming material is larger than the portion where the widthwise groove portion is formed. <9> or <10> The pants according to <9> or <10>, wherein the pants according to <9> or <10> are made of a low basis weight part, comprising a quantity part, wherein the forming part of the width direction groove part is less in the absorbent core forming material than the width direction groove part non-formation part. Mold absorbent article.
<12> The pants-type absorbent article according to any one of <1> to <8>, wherein the widthwise groove portion includes a linear through-hole penetrating the absorbent core in the thickness direction.

＜１３＞ 前記吸収性コア背側領域に、前記幅方向溝部が本体長手方向に所定間隔をおいて複数本形成されていると共に、本体長手方向に延びる線状の長手方向溝部が本体幅方向に所定間隔をおいて複数本形成されており、これら複数本の幅方向溝部及び長手方向溝部によって、該吸収性コア背側領域が多数の区画領域に区画化されている前記＜１＞〜＜１２＞の何れか１に記載のパンツ型吸収性物品。
＜１４＞ 複数本の前記長手方向溝部は、それぞれ、吸収性コア腹側領域（前記吸収性コアにおける前記腹側部に位置する領域〕（前記腹側部）から吸収性コア股下領域〔前記吸収性コアにおける股下部（前記腹側部と前記背側部との間に位置し着用者の股間部に配される部位）に位置する領域〕（前記股下部）を通って前記吸収性コア背側領域（前記背側部）に亘って連続的に延びる連続直線状に形成されている前記＜１３＞記載のパンツ型吸収性物品。
＜１５＞ 複数本の前記長手方向溝部は、前記吸収性コアの本体幅方向の中央部に形成されている前記＜１３＞又は＜１４＞記載のパンツ型吸収性物品。
＜１６＞前記幅方向溝部及び前記長手方向溝部は、それぞれ、吸収性コア形成材料の積繊量を部分的に異ならせることによって形成されたものである前記＜１３＞〜＜１５＞の何れか１に記載のパンツ型吸収性物品。
＜１７＞前記吸収性コアにおける高坪量部（前記区画領域。前記幅方向溝部及び前記長手方向溝部が形成されていない部位。）の坪量は、好ましくは２００ｇ／ｍ2以上、更に好ましくは３００ｇ／ｍ2以上、そして、好ましくは９００ｇ／ｍ2以下、更に好ましくは８００ｇ／ｍ2以下、より具体的には、好ましくは２００〜９００ｇ／ｍ2、更に好ましくは３００〜８００ｇ／ｍ2である前記＜１３＞〜＜１６＞の何れか１に記載のパンツ型吸収性物品。
＜１８＞前記吸収性コアにおける低坪量部（前記吸収性コアにおける、線状の前記凹部からなる前記幅方向溝部及び前記長手方向溝部の形成部位）の坪量は、好ましくは１０ｇ／ｍ2以上、更に好ましくは５０ｇ／ｍ2以上、そして、好ましくは５００ｇ／ｍ2以下、更に好ましくは４００ｇ／ｍ2以下、より具体的には、好ましくは１０〜５００ｇ／ｍ2、更に好ましくは５０〜４００ｇ／ｍ2である前記＜１３＞〜＜１７＞の何れか１に記載のパンツ型吸収性物品。 <13> A plurality of the widthwise groove portions are formed in the longitudinal direction of the main body in the longitudinal direction of the main body and the linear longitudinal groove portion extending in the longitudinal direction of the main body extends in the width direction of the main body. <1> to <12, wherein a plurality of widthwise grooves and longitudinal grooves are formed at a predetermined interval, and the back side region of the absorbent core is partitioned into a number of partitioned regions. > The pants type absorbent article according to any one of the above.
<14> The plurality of longitudinal grooves are respectively formed from the absorbent core ventral region (region located on the ventral side of the absorbent core) (the ventral portion) to the absorbent core crotch region [the absorption In the crotch part (region located between the abdomen and the dorsal part and located in the crotch part of the wearer)] (the crotch part) through the absorbent core back The underpants-type absorbent article according to <13>, wherein the article is formed in a continuous linear shape continuously extending over a side region (the back side portion).
<15> The pants-type absorbent article according to <13> or <14>, wherein the plurality of longitudinal grooves are formed in a central portion of the absorbent core in the body width direction.
<16> Any of the above <13> to <15>, wherein the widthwise groove and the longitudinal groove are each formed by partially varying the amount of absorbent core forming material. The underpants-type absorbent article according to 1.
<17> The basis weight of the high basis weight portion (the partition region, where the width direction groove portion and the longitudinal direction groove portion are not formed) in the absorbent core is preferably 200 g / m 2 or more, and more preferably. 300 g / m 2 or more, and preferably 900 g / m 2 or less, more preferably 800 g / m 2 or less, more specifically, preferably 200~900g / m 2, more preferably at 300 to 800 g / m 2 The pants-type absorbent article according to any one of <13> to <16>.
<18> The basis weight of the low basis weight part in the absorbent core (formation site of the width direction groove part and the longitudinal direction groove part formed of the linear concave part in the absorbent core) is preferably 10 g / m 2. or more, more preferably 50 g / m 2 or more, and preferably 500 g / m 2 or less, more preferably 400 g / m 2 or less, more specifically, preferably 10 to 500 g / m 2, more preferably 50 to The underpants-type absorbent article according to any one of <13> to <17>, which is 400 g / m 2 .

＜１９＞前記幅方向溝部の幅は、好ましくは１ｍｍ以上、更に好ましくは２ｍｍ以上、そして、好ましくは２０ｍｍ以下、更に好ましくは１０ｍｍ以下、より具体的には、好ましくは１〜２０ｍｍ、更に好ましくは２〜１０ｍｍである前記＜１＞〜＜１８＞の何れか１に記載のパンツ型吸収性物品。
＜２０＞本体長手方向に隣接する２本の前記幅方向溝部の間隔は、好ましくは５ｍｍ以上、更に好ましくは１０ｍｍ以上、そして、好ましくは３０ｍｍ以下、更に好ましくは２５ｍｍ以下、より具体的には、好ましくは５〜３０ｍｍ、更に好ましくは１０〜２５ｍｍである前記＜１＞〜＜１９＞の何れか１に記載のパンツ型吸収性物品。
＜２１＞前記外包体腹側領域（前記腹側部）の胴回り部に配されている前記外包体形成用弾性部材は、前記吸収性本体（前記吸収性コア）と重なる部分に、該外包体形成用弾性部材の伸縮性の発現が抑制された非伸縮部を有している前記＜１＞〜＜２０＞の何れか１に記載のパンツ型吸収性物品。
＜２２＞前記外包体腹側領域（前記腹側部）の胴回り部においては、前記外包体形成用弾性部材は前記非伸縮部では伸縮せず、前記吸収性本体（前記吸収性コア）の配置領域（該非伸縮部）を除く、本体長手方向に沿う左右両側部に、一対の胴回りギャザーが形成されている前記＜２１＞記載のパンツ型吸収性物品。 <19> The width of the widthwise groove is preferably 1 mm or more, more preferably 2 mm or more, and preferably 20 mm or less, more preferably 10 mm or less, and more specifically preferably 1 to 20 mm, more preferably The underpants-type absorbent article according to any one of <1> to <18>, which is 2 to 10 mm.
<20> The interval between the two widthwise grooves adjacent to the longitudinal direction of the main body is preferably 5 mm or more, more preferably 10 mm or more, and preferably 30 mm or less, more preferably 25 mm or less, more specifically, The pants-type absorbent article according to any one of <1> to <19>, which is preferably 5 to 30 mm, more preferably 10 to 25 mm.
<21> The outer-packet forming elastic member disposed in the waist portion of the outer-pack body ventral region (the belly-side portion) overlaps the outer bag body in a portion overlapping the absorbent main body (the absorbent core). The underpants-type absorbent article according to any one of <1> to <20>, wherein the elastic member for forming has a non-stretchable portion in which expression of stretchability is suppressed.
<22> In the waist portion of the outer envelope ventral region (the ventral portion), the outer envelope forming elastic member does not expand and contract in the non-stretchable portion, and the absorbent main body (the absorbent core) is disposed. The pants-type absorbent article according to the above <21>, wherein a pair of waistline gathers is formed on both right and left side portions along the longitudinal direction of the main body excluding the region (the non-stretchable portion).

以下、本発明を実施例により更に具体的に説明するが、本発明は斯かる実施例に限定されるものではない。   EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples.

〔実施例１〕
図１〜図５に示すおむつ１と同様の基本構成を有するパンツ型使い捨ておむつを作製し、これを実施例１のサンプルとした。実施例１においては、前記実施形態と同様に、吸収性コア背側領域５２を本体幅方向Ｙに横断する複数本の弾性部材３３の全てが、該吸収性コア背側領域５２の複数本の幅方向溝部６と本体長手方向Ｘにおいて同位置にあり、背側部Ｂにおいて、複数本の弾性部材３３と複数本の幅方向溝部６とが１対１で対応していた（図６参照）。 [Example 1]
A pants-type disposable diaper having a basic configuration similar to that of the diaper 1 shown in FIGS. 1 to 5 was produced and used as a sample of Example 1. In Example 1, as in the above-described embodiment, all of the plurality of elastic members 33 crossing the absorbent core back side region 52 in the body width direction Y are formed of the plurality of the absorbent core back side region 52. The width direction groove portion 6 and the main body longitudinal direction X are at the same position, and in the back side portion B, the plurality of elastic members 33 and the plurality of width direction groove portions 6 correspond one-to-one (see FIG. 6). .

実施例１で用いたおむつの構成部材は下記の通り。表面シート２１としては、坪量２５ｇ／ｍ2の液透過性のエアスルー不織布を用いた。裏面シート２２としては、坪量２０ｇ／ｍ2の液不透過性且つ透湿性のポリエチレン製樹脂フィルム（炭酸カルシウム配合）を用いた。吸収体２３としては、フラッフパルプ１５０ｇ／ｍ2と吸水性ポリマー２１０ｇ／ｍ2との均一混合物からなる総坪量３６０ｇ／ｍ2の吸収性コア５の外面を、坪量１６ｇ／ｍ2の液透過性のティッシュペーパーで被覆したものを用いた。この吸収性コア５の本体長手方向の全長は３９０ｍｍ、本体幅方向の全長（最大長さ）は１２０ｍｍであった。外層シート材３５及び内層シート材３６としては、それぞれ、坪量２０ｇ／ｍ2の液透過性のエアスルー不織布を用いた。立体ギャザー形成用のシート材４１としては、裏面シート２２と同じものを用いた。外包体形成用弾性部材３３及び立体ギャザー形成用弾性部材４２としては、それぞれ、直径０．２ｍｍのポリウレタン製の糸状の弾性部材を用い、該弾性部材のシート材３５，３６又はシート材４１への固定は、ホットメルト型接着剤により行った。 The diaper components used in Example 1 are as follows. As the surface sheet 21, a liquid-permeable air-through nonwoven fabric having a basis weight of 25 g / m 2 was used. As the back sheet 22, a liquid-impermeable and moisture-permeable polyethylene resin film (calcium carbonate blend) having a basis weight of 20 g / m 2 was used. The absorbent body 23, the outer surface of the absorbent core 5 of fluff pulp 150 g / m 2 and the water-absorbing polymer 210g / m 2 made from a homogeneous mixture of a total basis weight 360 g / m 2, the liquid having a basis weight of 16g / m 2 The one coated with a permeable tissue paper was used. The total length of the absorbent core 5 in the longitudinal direction of the main body was 390 mm, and the total length in the width direction of the main body (maximum length) was 120 mm. As the outer layer sheet material 35 and the inner layer sheet material 36, liquid-permeable air-through nonwoven fabrics each having a basis weight of 20 g / m 2 were used. As the sheet material 41 for forming a three-dimensional gather, the same material as the back sheet 22 was used. As the elastic member 33 for forming the outer envelope and the elastic member 42 for forming the three-dimensional gather, a thread-like elastic member made of polyurethane having a diameter of 0.2 mm is used, and the elastic member is applied to the sheet material 35, 36 or the sheet material 41. Fixing was performed with a hot-melt adhesive.

実施例１で用いた吸収性コア５の各部の寸法等は下記の通り。
・線状の凹部からなる幅方向溝部６の幅Ｗ１（図５参照）は５ｍｍ。尚、線状の凹部からなる長手方向溝部７の幅は、幅方向溝部６の幅Ｗ１と同じに設定した。
・本体長手方向Ｘに隣接する２本の幅方向溝部６，６の間隔Ｗ２（図６参照）は１８ｍｍ、本体幅方向Ｙに隣接する２本の長手方向溝部７，７の間隔Ｗ３（図６参照）は２５ｍｍ。
・吸収性コア腹側領域５１（腹側部Ａ）及び吸収性コア背側領域５２（背側部Ｂ）それぞれにおける幅方向溝部６の本数は５本。
・長手方向溝部７は、吸収性コア腹側領域５１（腹側部Ａ）から吸収性コア股下領域５３（股下部Ｃ）を通って吸収性コア背側領域５２（背側部Ｂ）に亘って連続的に延びる連続直線状であり、その本数は３本。
・吸収性コア５における区画領域８（高坪量部）の坪量は３６０ｇ／ｍ2、線状の凹部からなる溝部６，７の形成部位（低坪量部。溝部６については図５中符号６０で示す部位。）の坪量は５０ｇ／ｍ2。
・溝部６，７の深さは、それぞれ５ｍｍ。 The dimensions of each part of the absorbent core 5 used in Example 1 are as follows.
-The width W1 (refer FIG. 5) of the width direction groove part 6 which consists of a linear recessed part is 5 mm. In addition, the width of the longitudinal groove portion 7 formed of a linear recess was set to be the same as the width W1 of the width direction groove portion 6.
The distance W2 (see FIG. 6) between the two widthwise groove portions 6 and 6 adjacent to the body longitudinal direction X is 18 mm, and the distance W3 between the two lengthwise groove portions 7 and 7 adjacent to the body width direction Y (FIG. 6). Reference) is 25 mm.
-The number of the width direction groove parts 6 in each of the absorbent core ventral region 51 (ventral side A) and the absorbent core dorsal region 52 (back side B) is five.
The longitudinal groove 7 extends from the absorbent core ventral region 51 (ventral side A) through the absorbent core crotch region 53 (crotch C) to the absorbent core dorsal region 52 (dorsal portion B). It is a continuous straight line extending continuously, and the number is three.
The basis weight of the partition region 8 (high basis weight portion) in the absorbent core 5 is 360 g / m 2 , and the formation site of the groove portions 6 and 7 formed of linear recesses (low basis weight portion. The groove portion 6 is shown in FIG. The basis weight of the portion indicated by reference numeral 60) is 50 g / m 2 .
-The depth of the groove parts 6 and 7 is 5 mm each.

〔実施例２〕
弾性部材３３と幅方向溝部６とが本体長手方向Ｘにおいて同位置にある箇所と、弾性部材３３と幅方向溝部６とが本体長手方向Ｘにおいて同位置に無い箇所とが、背側部Ｂに混在していた点以外は、実施例１と同様にしてパンツ型使い捨ておむつを作製し、これを実施例２のサンプルとした。 [Example 2]
A location where the elastic member 33 and the width direction groove portion 6 are in the same position in the longitudinal direction X of the main body and a location where the elastic member 33 and the width direction groove portion 6 are not in the same position in the longitudinal direction X of the main body are A pants-type disposable diaper was produced in the same manner as in Example 1 except that it was mixed, and this was used as the sample of Example 2.

〔比較例１〕
吸収性コア５として、長手方向溝部７は形成されているが幅方向溝部６は形成されていない吸収性コアを用いた以外は実施例１と同様にしてパンツ型使い捨ておむつを作製し、これを比較例１のサンプルとした。 [Comparative Example 1]
As the absorbent core 5, a pants-type disposable diaper was prepared in the same manner as in Example 1 except that an absorbent core in which the longitudinal groove 7 was formed but the width groove 6 was not formed was prepared. A sample of Comparative Example 1 was obtained.

〔比較例２〕
背側シート部材３２（外包体背側領域）に弾性部材３３を配設しなかった以外は実施例１と同様にしてパンツ型使い捨ておむつを作製し、これを比較例２のサンプルとした。 [Comparative Example 2]
A pants-type disposable diaper was produced in the same manner as in Example 1 except that the elastic member 33 was not disposed on the back sheet member 32 (outer package back side region).

〔評価〕
実施例及び比較例の各サンプル（パンツ型使い捨ておむつ）について、液拡散性を下記方法により評価した。その結果を下記表１に示す。尚、表１中のＷ１やＬ１等の符合は、図中の同一符合に対応したものである。 [Evaluation]
About each sample (pants type disposable diaper) of an Example and a comparative example, liquid diffusibility was evaluated by the following method. The results are shown in Table 1 below. The codes such as W1 and L1 in Table 1 correspond to the same codes in the figure.

＜液拡散性の評価方法＞
サンプル（パンツ型使い捨ておむつ）を着用させたアクリル製のベビーモデルを仰向けに寝かせた状態で、４０ｇの人工尿をサンプル（吸収性コア）の中心（おむつ又は吸収性コアの本体長手方向の中央且つ本体幅方向の中央）に注入速度５ｇ／秒で注入し、その状態で５分間放置した後、ベビーモデルからサンプルを脱がし、サンプルの背側部における本体長手方向の外方端（図１中符合１ｂで示す部位）と人工尿の拡散部分との間の本体長手方向に沿った離間距離（液非拡散部長さ）を測定すると共に、背側部において人工尿が拡散していない部分の面積（液非拡散部面積）を測定した。液非拡散部面積は、吸収性コアにおける、人工尿の拡散部分のおむつ外方端１ｂ（図１参照）寄りの長手方向端部から該吸収性コアの該おむつ外方端１ｂ寄りの長手方向端部までの未使用領域（吸収性コアにおける人工尿を吸収保持していない領域）の面積である。前記液非拡散部長さが長いほど、また、前記液非拡散部面積が大きいほど、尿の背側部側への拡散が効果的に抑制され、背側からの漏れ防止性に優れると評価でき、高評価となる。人工尿の組成は次の通り。尿素１．９４質量％、塩化ナトリウム０．７９５４質量％、硫酸マグネシウム（七水和物）０．１１０５８質量％、塩化カルシウム（二水和物）０．０６２０８質量％、硫酸カリウム０．１９７８８質量％、ポリオキシエチレンラウリルエーテル０．００３５質量％及びイオン交換水（残量）。 <Method for evaluating liquid diffusibility>
With an acrylic baby model wearing a sample (pants-type disposable diaper) lying on its back, 40 g of artificial urine was placed in the center of the sample (absorbent core) in the longitudinal direction of the body (diaper or absorbent core) Inject at the injection speed of 5g / sec in the center of the body width direction and leave it in that state for 5 minutes, then remove the sample from the baby model, and the outer end of the body in the longitudinal direction on the dorsal side of the sample. 1b) and the area of the portion where the artificial urine is not diffused on the dorsal side (the non-diffusion portion length) along the longitudinal direction of the main body between the diffusion portion of the artificial urine (Liquid non-diffusion part area) was measured. The area of the liquid non-diffusion part is the longitudinal direction of the absorbent core in the longitudinal direction near the diaper outer end 1b of the absorbent core from the longitudinal end of the artificial urine diffusion part near the diaper outer end 1b (see FIG. 1). It is the area of the unused area | region (area | region which does not absorb and hold artificial urine in an absorptive core) to an edge part. It can be evaluated that the longer the liquid non-diffusion part length is, and the larger the liquid non-diffusion part area is, the more effectively the diffusion of urine to the dorsal side is suppressed, and the superior leakage prevention from the back side. High evaluation. The composition of artificial urine is as follows. 1.94% by mass of urea, 0.7954% by mass of sodium chloride, 0.11058% by mass of magnesium sulfate (septahydrate), 0.06208% by mass of calcium chloride (dihydrate), 0.19788% by mass of potassium sulfate , Polyoxyethylene lauryl ether 0.0035 mass% and ion-exchanged water (remaining amount).

Figure 0005997945
Figure 0005997945

表１に示す通り、実施例１及び２は、何れも比較例１及び２に比して、液非拡散部長さが長く且つ液非拡散部面積が大きく、従って、尿の背側部側への拡散が効果的に抑制され、背側からの漏れ防止性に優れる結果となった。比較例１においては、背側シート部材３２（外包体背側領域）の外包体形成用弾性部材３３が、吸収性コア背側領域５２を本体幅方向Ｙに横断しているものの、該吸収性コア背側領域５２に本体幅方向Ｙに延びる線状の幅方向溝部６が形成されていないため、比較例１は、実施例１及び２に比して漏れ防止性に劣る結果となったと推察される。また、比較例２においては、吸収性コア背側領域５２に本体幅方向Ｙに延びる線状の幅方向溝部６が形成されているものの、背側シート部材３２に外包体形成用弾性部材３３が配設されておらず、該吸収性コア背側領域５２を本体幅方向Ｙに横断する外包体形成用弾性部材が存在していないため、比較例２は、実施例１及び２に比して漏れ防止性に劣る結果となったと推察される。以上のことから、パンツ型使い捨ておむつの如きパンツ型吸収性物品において、着用者の背側に対するフィット性を高め、背側からの漏れを効果的に防止するためには、吸収性コア背側領域に、本体幅方向に延びる線状の幅方向溝部が形成され、且つ外包体背側領域の外包体形成用弾性部材が、該吸収性コア背側領域を本体幅方向に横断していることが有効であることがわかる。   As shown in Table 1, both Examples 1 and 2 have a longer liquid non-diffusion part length and a larger liquid non-diffusion part area compared to Comparative Examples 1 and 2, and therefore, toward the back side of urine. Was effectively suppressed, and the leakage prevention property from the back side was excellent. In Comparative Example 1, the outer-packet forming elastic member 33 of the back-side sheet member 32 (outer bag back-side region) crosses the absorbent core back-side region 52 in the body width direction Y. Since the linear width direction groove portion 6 extending in the body width direction Y is not formed in the core back side region 52, it is inferred that the comparative example 1 is inferior to the leakage preventing property as compared with the examples 1 and 2. Is done. Further, in Comparative Example 2, although the linear widthwise groove 6 extending in the main body width direction Y is formed in the absorbent core backside region 52, the outer-packet forming elastic member 33 is formed on the backside sheet member 32. Since there is no elastic member for forming an outer envelope that crosses the absorbent core dorsal region 52 in the body width direction Y, Comparative Example 2 is compared with Examples 1 and 2. It is inferred that the results were inferior in leakage prevention. From the above, in a pants-type absorbent article such as a pants-type disposable diaper, in order to improve the fit to the wearer's back side and effectively prevent leakage from the back side, the absorbent core back region Further, a linear widthwise groove portion extending in the body width direction is formed, and the outer-packet forming elastic member in the outer bag back side region crosses the absorbent core back side region in the main body width direction. It turns out that it is effective.

１ パンツ型使い捨ておむつ（パンツ型吸収性物品）
２ 吸収性本体
３ 外包体
４ 立体ギャザー
５ 吸収性コア
６ 幅方向溝部
７ 長手方向溝部
８ 区画領域
２１ 表面シート
２２ 裏面シート
２３ 吸収体
３１ 腹側シート部材（外包体腹側領域）
３２ 背側シート部材（外包体背側領域）
３３ 外包体形成用弾性部材
３５ 外層シート材
３６ 内層シート材
５１ 吸収性コア腹側領域
５２ 吸収性コア背側領域
６０ 吸収性コアにおける幅方向溝部の形成部位
Ａ 腹側部
Ｂ 背側部
Ｃ 股下部
Ｄ ウエスト部
Ｅ 胴回り部
Ｘ 本体長手方向
Ｙ 本体幅方向 1 Pants-type disposable diapers (pants-type absorbent articles)
DESCRIPTION OF SYMBOLS 2 Absorbent main body 3 Outer package 4 Solid gather 5 Absorbent core 6 Width direction groove part 7 Longitudinal groove part 8 Compartment area | region 21 Top sheet 22 Back sheet 23 Absorber 31 Abdominal side sheet | seat member (outer package vent side area)
32 Back side seat member (exterior body back side region)
33 Elastic member 35 for forming outer envelope body Outer layer sheet material 36 Inner layer sheet material 51 Absorbent core ventral region 52 Absorbent core dorsal region 60 Forming portion A of the widthwise groove in the absorbent core A Abdominal side portion B Back side portion C Inseam Part D Waist part E Girth around part X Body longitudinal direction Y Body width direction

Claims (4)

吸収性コアを含む縦長の吸収性本体と、該吸収性本体の非肌対向面側に配されて該吸収性本体を固定している外包体とを備え、着用時に着用者の腹側に配される腹側部及び背側に配される背側部を本体長手方向に有し、該外包体における該腹側部に位置する外包体腹側領域及び該背側部に位置する外包体背側領域それぞれの本体長手方向に沿う両側縁部どうしが接合されて一対のサイドシール部、ウエスト開口部及び一対のレッグ開口部が形成されているパンツ型吸収性物品であって、
前記外包体は、シート材と、該シート材に固定された複数本の外包体形成用弾性部材とを含んで構成されており、前記外包体背側領域において、複数本の該外包体形成用弾性部材が、本体長手方向と直交する本体幅方向に伸長した状態で、本体長手方向に所定間隔を置いて配されており、
前記吸収性コアにおける前記背側部に位置する吸収性コア背側領域に、本体幅方向に延びる線状の幅方向溝部が形成されており、前記外包体背側領域の前記外包体形成用弾性部材が、該吸収性コア背側領域を本体幅方向に横断しており、
前記外包体背側領域の複数本の前記外包体形成用弾性部材のうちの少なくとも１本は、本体長手方向において前記幅方向溝部と同位置にあるパンツ型吸収性物品。 A vertically long absorbent main body including an absorbent core, and an outer package that is disposed on the non-skin-facing surface side of the absorbent main body and fixes the absorbent main body, and is disposed on the abdomen side of the wearer when worn. An abdominal side portion and a dorsal side portion arranged on the back side in the longitudinal direction of the main body, and an outer envelope body ventral region located on the abdominal side portion of the outer wrapper and an outer package back located on the back side portion A pants-type absorbent article in which both side edge portions along the longitudinal direction of the body of each side region are joined to each other to form a pair of side seal portions, a waist opening portion and a pair of leg opening portions,
The outer package includes a sheet material and a plurality of elastic members for forming an outer packet fixed to the sheet material, and a plurality of the outer packets for forming the outer packet are formed in the outer package back side region. The elastic member is arranged at a predetermined interval in the main body longitudinal direction with the elastic member extending in the main body width direction orthogonal to the main body longitudinal direction,
A linear widthwise groove extending in the width direction of the main body is formed in the absorbent core dorsal region located in the dorsal side portion of the absorbent core, and the outer package forming elasticity of the outer package dorsal region is formed. A member crosses the absorbent core dorsal region in the body width direction ,
A pants-type absorbent article in which at least one of the plurality of outer-packet forming elastic members in the outer-packer dorsal region is located at the same position as the widthwise groove in the longitudinal direction of the main body . 前記幅方向溝部は、前記吸収性コアの一面側が他面側に向けて凹陥してなる線状の凹部からなる請求項１記載のパンツ型吸収性物品。 The width direction groove, said absorbent recessed and consisting of a linear recess formed by claim 1 Symbol placement of pant-type absorbent article toward the one surface side of the other surface side of the core. 前記幅方向溝部は、前記吸収性コアを厚み方向に貫通する線状の貫通孔からなる請求項１記載のパンツ型吸収性物品。 The width direction groove, claim 1 Symbol placement of pant-type absorbent article comprising a linear through hole passing through the absorbent core in the thickness direction. 前記吸収性コア背側領域に、前記幅方向溝部が本体長手方向に所定間隔をおいて複数本形成されていると共に、本体長手方向に延びる線状の長手方向溝部が本体幅方向に所定間隔をおいて複数本形成されており、これら複数本の幅方向溝部及び長手方向溝部によって、該吸収性コア背側領域が多数の区画領域に区画化されている請求項１〜３の何れか一項に記載のパンツ型吸収性物品。 A plurality of the widthwise groove portions are formed in the longitudinal direction of the main body at predetermined intervals in the back side region of the absorbent core, and the linear lengthwise groove portions extending in the longitudinal direction of the main body have predetermined intervals in the main body width direction. are Oite plurality of formation, the width direction groove and the longitudinal groove portions of the plurality of, any one of claim 1 to 3, the absorbent core back-side region is partitioned into a number of divided areas The pants-type absorbent article described in 1.
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