JP2014068850A

JP2014068850A - Underpants type disposable diaper

Info

Publication number: JP2014068850A
Application number: JP2012217807A
Authority: JP
Inventors: Takeshi Minami; 武志南
Original assignee: Daio Paper Corp
Current assignee: Daio Paper Corp
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2014-04-21
Anticipated expiration: 2032-09-28
Also published as: JP5999761B2

Abstract

PROBLEM TO BE SOLVED: To provide an underpants type disposable diaper, improved in fitness and leakage prevention performance in the sides of a crotch part.SOLUTION: In an underpants type disposable diaper, a recess part 13N narrower than both front and rear sides is formed on a crotch part of an absorber 13, and an interior body 10 is provided with a surplus part 19 without the absorber 13 formed on a part corresponding to the recess part 13N of the absorber 13. A non-joining part 31 where the interior body 10 and an exterior body 20 are not fixed is extended in the longitudinal direction in an area which overlaps the surplus part 19 of the interior body 10, and a joining part 32 is provided on both sides in the width direction of the non-joining part 31. The exterior body 20 is provided with a crotch fit elastic member 27 for contracting the non-joining part 31 of the interior body 10 in the width direction.

Description

本発明は、股間部におけるフィット性及び漏れ防止性を改善したパンツタイプ使い捨ておむつに関する。 The present invention relates to a pants-type disposable diaper having improved fit and leakage prevention in the crotch region.

パンツタイプ使い捨ておむつは、装着者の腹側から股間を通り背側まで延在する外装体と、この外装体の内面に固定された、吸収体を含む内装体とを備え、外装体の腹側の両側縁部と外装体の背側の両側縁部とが接合されることにより、ウエスト開口部及び左右一対の脚開口部が形成されているものであり、内装体の表面両側部には身体側に突出する立体ギャザーを備えたものが一般的となっている。 The pants-type disposable diaper includes an exterior body that extends from the wearer's abdomen to the back through the crotch, and an interior body that includes an absorbent body that is fixed to the inner surface of the exterior body. A waist opening and a pair of left and right leg openings are formed by joining both side edges of the body and the back side edges of the exterior body. What is provided with the three-dimensional gather which protrudes to the side is common.

また、パンツタイプ使い捨ておむつにおいては、身体へのフィット性を向上させるために、外装体に、ウエスト部弾性部材、腰回り弾性部材及び湾曲弾性部材等、種々の弾性部材を伸長状態で固定することが行われている（例えば特許文献１、２参照）。ここに、ウエスト部弾性部材は、ウエスト開口部の縁部に、縦方向に間隔を空けて幅方向に沿って複数本平行に配置されているものである。また、腰回り弾性部材は、ウエスト部弾性部材よりも前後方向中央部側の領域に、縦方向に間隔を空けて幅方向に沿って配置されているものである。さらに、湾曲弾性部材は、前身頃及び後身頃の少なくとも一方において、一方のサイドシール部から一方のレッグ開口部に沿って股間部に向かい、股間部を横断し、かつ他方のレッグ開口部に沿って他方のサイドシール部に至るパターンで、湾曲しつつ延在するものである。これら弾性部材は、幅方向中央部における内装体と重なる部分を細かく切断し、内装体の収縮を防止することが一般的である。 Moreover, in a pants-type disposable diaper, in order to improve fit to the body, various elastic members such as a waist elastic member, a waist elastic member and a curved elastic member are fixed to the exterior body in an extended state. (For example, refer to Patent Documents 1 and 2). Here, a plurality of waist elastic members are arranged in parallel along the width direction at intervals in the vertical direction at the edge of the waist opening. Further, the waist elastic member is disposed along the width direction with a space in the vertical direction in a region closer to the center in the front-rear direction than the waist elastic member. Furthermore, the curved elastic member is directed to the crotch portion along one leg opening from one side seal portion, across the crotch portion, and along the other leg opening portion in at least one of the front body and the back body. The pattern extends to the other side seal portion while being curved. In general, these elastic members finely cut a portion overlapping the interior body in the central portion in the width direction to prevent shrinkage of the interior body.

また、製造上の理由により、内装体の平面形状は長方形であるものの、股間部におけるフィット性を改善するために、吸収体の股間部を脚周りに沿う括れ形状とすることも良く行われている。 In addition, for reasons of manufacturing, the planar shape of the interior body is rectangular, but in order to improve the fit in the crotch part, the crotch part of the absorber is often formed into a constricted shape along the circumference of the leg. Yes.

しかしながら、内装体の平面形状が長方形であるために、せっかく吸収体の股間部を括れ形状としても、その括れ部分では内装体の側部が余ることになり、しかもこの余り部分は吸収体が無いことにより薄く低剛性であるため、次のような問題点があった。 However, since the planar shape of the interior body is a rectangle, even if the crotch portion of the absorber is constricted, the side portion of the interior body is left at the constricted portion, and the surplus portion has no absorber. Since it is thin and has low rigidity, there are the following problems.

すなわち、余り部分は吸収体が無く、薄い部分であるために、尿が流れ込み易く、かつ吸収され難い。その結果、漏れを助長するおそれがある。また、余り部分は低剛性であるために、不規則に変形して股間部におけるフィット性が損なわれたり、立体ギャザーを強く支持できずに股間部における立体ギャザーのフィット性が損なわれたりするおそれもあった。 That is, since the surplus portion has no absorber and is a thin portion, urine is easy to flow in and is not easily absorbed. As a result, there is a risk of promoting leakage. In addition, since the remaining portion has low rigidity, it may be irregularly deformed and the fitting property in the crotch portion may be impaired, or the three-dimensional gathering property in the crotch portion may be impaired without strongly supporting the three-dimensional gathering. There was also.

特開２０１１−２０６２６９号公報JP 2011-206269 A 特開２０１０−１４２４９９号公報JP 2010-142499 A

そこで本発明の主たる課題は、上記問題点を解決することにある。 Therefore, a main problem of the present invention is to solve the above problems.

上記課題を解決した本発明は次のとおりである。
＜請求項１記載の発明＞
装着者の腹側から股間を通り背側まで延在する外装体と、この外装体の内面に固定された、吸収体を含む内装体とを備え、
前記外装体の腹側の両側縁部と外装体の背側の両側縁部とが接合されることにより、ウエスト開口部及び左右一対の脚開口部が形成された、
パンツタイプ使い捨ておむつにおいて、
前記吸収体の股間部に、前後両側よりも幅の狭い括れ部分が形成されるとともに、前記内装体には、前記吸収体の括れ部分と対応する部分に、吸収体を有しない余り部分が形成されており、
前記内装体の余り部分と重なる領域内に前記内装体と前記外装体とが固定されていない非接合箇所が前後方向に延在され、この非接合箇所の幅方向両側に接合箇所が設けられ、前記内装体の前記非接合箇所を幅方向に収縮させる股間フィット弾性部材が前記外装体に設けられている、
ことを特徴とするパンツタイプ使い捨ておむつ。 The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An exterior body extending from the wearer's abdomen to the back through the crotch, and an interior body including an absorbent body fixed to the inner surface of the exterior body,
A waist opening and a pair of left and right leg openings were formed by joining both side edges on the ventral side of the exterior body and both side edges on the back side of the exterior body,
In pants-type disposable diapers,
In the crotch portion of the absorbent body, a narrowed portion narrower than both front and rear sides is formed, and in the interior body, a surplus portion not having an absorbent body is formed in a portion corresponding to the narrowed portion of the absorbent body. Has been
A non-joined portion where the interior body and the exterior body are not fixed is extended in the front-rear direction in a region overlapping with a surplus portion of the interior body, and joint portions are provided on both sides in the width direction of the non-joined portion, A crotch fitting elastic member for contracting the non-joined portion of the interior body in the width direction is provided in the exterior body.
A pants-type disposable diaper characterized by that.

（作用効果）
このように、内装体の余り部分において内装体及び外装体の非接合箇所及び接合箇所を設けるとともに股間フィット弾性部材を外装体に設けると、股間フィット弾性部材の収縮作用によって内装体の余り部分はその非接合箇所がおむつ表面側に襞状に隆起しつつ幅方向に収縮する。つまり、内装体の余り部分は規則的な幅方向収縮変形により、厚みが増加し、剛性が高まり、幅は減少する。その結果、内装体の余り部分は、吸収体が無い割には厚みがあり幅も狭いため、尿が流れ込み難くなり、漏れが発生し難くなる。特に、本発明では内装体の余り部分に襞状の隆起が形成され、これが尿の幅方向移動を阻止するため、漏れ防止効果は一層のものとなる。
また、内装体の余り部分は規則的変形により幅方向に収縮して高剛性となるために、不規則変形によるフィット性の低下が防止されるとともに、内装体の表面の両側部に立体ギャザーを有する場合には、立体ギャザーが強固に支持され、股間に対するフィット性の低下が防止される。 (Function and effect)
Thus, when the non-joint part and joint part of the interior body and the exterior body are provided in the surplus part of the interior body and the crotch fit elastic member is provided in the exterior body, the surplus part of the interior body is caused by the contraction action of the crotch fit elastic member. The non-joined portion is raised in a bowl shape on the diaper surface side and contracted in the width direction. That is, the surplus portion of the interior body increases in thickness, increases in rigidity, and decreases in width due to regular shrinkage deformation in the width direction. As a result, the surplus portion of the interior body is thick and narrow even though there is no absorber, so that urine is difficult to flow in and leakage is difficult to occur. In particular, according to the present invention, a ridge-like bulge is formed in the surplus portion of the interior body, and this prevents the urine from moving in the width direction, so that the leakage prevention effect is further enhanced.
In addition, since the excess portion of the interior body contracts in the width direction due to regular deformation and becomes highly rigid, a decrease in fit due to irregular deformation is prevented, and solid gathers are provided on both sides of the surface of the interior body. When it has, a solid gather is supported firmly and the fall of the fitting property with respect to a crotch is prevented.

＜請求項２記載の発明＞
前記内装体の裏面の側部に固定された固定部と、この固定部から内装体の側方を経て内装体の表面の側部まで延在する本体部と、本体部の前後端部が倒伏状態で内装体の表面の側部に固定されて形成された倒伏部分と、この倒伏部分間が非固定とされて形成された自由部分と、この自由部分の先端部に前後方向に沿って設けられた弾性部材と、を有する立体ギャザーを、内装体の両側部に備えた、請求項１記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 2>
The fixed part fixed to the side part of the back surface of the interior body, the main body part extending from the fixed part to the side part of the surface of the interior body through the side of the interior body, and the front and rear ends of the body part are lying down A lying part fixed to the side of the surface of the interior body in a state, a free part formed by non-fixing the inside of the lying part, and provided at the front end of the free part along the front-rear direction The pants-type disposable diaper according to claim 1, wherein a three-dimensional gather having a formed elastic member is provided on both sides of the interior body.

（作用効果）
このような構造の立体ギャザーは、吸収体の括れ部分による支持力の低下の影響を受け易い。よって、本発明はこのような立体ギャザーを有する場合に好適である。 (Function and effect)
The three-dimensional gather having such a structure is easily affected by a decrease in supporting force due to the constricted portion of the absorber. Therefore, this invention is suitable when it has such a three-dimensional gather.

＜請求項３記載の発明＞
前記内装体は、前記吸収体の裏側を覆う液不透過性シートを備えており、この液不透過性シートの側縁部が前記内装体の余り部分まで延在されている、請求項１又は２記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 3>
The interior body includes a liquid-impermeable sheet that covers a back side of the absorber, and a side edge portion of the liquid-impermeable sheet extends to a remaining portion of the interior body. 2. Pants-type disposable diapers as described in 2.

（作用効果）
このような構造を採用することにより、襞状の隆起内に液不透過性シートが内蔵されるため、襞状の隆起による尿の移動阻止性能がより一層のものとなる。 (Function and effect)
By adopting such a structure, since the liquid-impermeable sheet is built in the bowl-shaped ridge, the urine movement prevention performance by the bowl-shaped ridge is further enhanced.

＜請求項４記載の発明＞
前記接合箇所が、前記内装体の余り部分と重なる領域の両側縁部又はその近傍にそれぞれ設けられ、これら接合箇所の間の全体が前記股間フィット弾性部材により収縮される非接合箇所とされている、請求項１〜３のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 4>
The joint portion is provided at each side edge portion of the region overlapping with the remainder of the interior body or in the vicinity thereof, and the entire portion between the joint portions is a non-joint portion that is contracted by the crotch fitting elastic member. The underpants type disposable diaper of any one of Claims 1-3.

（作用効果）
この形態では、内装体の余り部分全体によって一つの高い襞状隆起が形成される。よって、襞状隆起の高さによる尿移動阻止機能を重視する場合に好ましい形態である。また幅方向収縮量を多くできる形態である。 (Function and effect)
In this form, one high ridge-like bulge is formed by the entire remainder of the interior body. Therefore, it is a preferable form when importance is attached to the function of preventing urine movement due to the height of the ridge-like ridge. Moreover, it is the form which can increase the amount of shrinkage in the width direction.

＜請求項５記載の発明＞
前記股間フィット弾性部材により収縮される非接合箇所が、前記内装体の余り部分と重なる領域内に、前記接合箇所を挟んで幅方向に複数設けられている、請求項１〜３のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 5>
The non-joining location contracted by the crotch fitting elastic member is provided in a plurality in the width direction across the joining location in a region overlapping with a surplus portion of the interior body. The pants-type disposable diaper described in the item.

（作用効果）
この形態では、内装体の余り部分によって襞状隆起が幅方向に複数形成される。よって、襞状隆起の高さよりも数による尿移動阻止機能を重視する場合に好ましい形態である。 (Function and effect)
In this form, a plurality of ridge-like ridges are formed in the width direction by the remaining portion of the interior body. Therefore, this is a preferred form when emphasizing the function of preventing urine movement by number rather than the height of the ridge-like ridge.

＜請求項６記載の発明＞
前記股間フィット弾性部材により収縮される非接合箇所が、脚周り方向に沿って連続的又は間欠的に設けられている、請求項１〜５のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 6>
The pants-type disposable diaper according to any one of claims 1 to 5, wherein the non-joined portion contracted by the crotch fitting elastic member is provided continuously or intermittently along a leg-circumferential direction.

（作用効果）
この形態では、内装体の余り部分によって形成される襞状隆起、及び幅方向収縮により形成される高剛性部がともに脚周りに沿って形成される。よって、脚周りに対するフィット性がより一層のものとなる。 (Function and effect)
In this form, both the ridge-like ridge formed by the surplus portion of the interior body and the high-rigidity portion formed by contraction in the width direction are formed along the legs. Therefore, the fit with respect to the leg periphery is further improved.

＜請求項７記載の発明＞
前記股間フィット弾性部材により収縮される非接合箇所が、前後方向中間から前後両側に向かうにつれて幅が広くなる形状に形成されている、請求項１〜５のいずれか１項に記載のパンツタイプ使い捨ておむつ。 <Invention of Claim 7>
The pants-type disposable according to any one of claims 1 to 5, wherein the non-joint portion contracted by the crotch fitting elastic member is formed in a shape that increases in width from the middle in the front-rear direction to both the front and rear sides. Diapers.

（作用効果）
この形態では、内装体の余り部分によって形成される襞状隆起が、脚の付け根部の窪みに適合した形状、すなわち前後方向中間部ほど高くかつ狭く、前後両側ほど低くかつ幅広く形成される。よって、脚付け根部の窪みに対するフィット性がより一層のものとなる。 (Function and effect)
In this form, the ridge-like ridge formed by the surplus portion of the interior body is formed in a shape suitable for the depression at the base of the leg, that is, higher and narrower in the front-rear direction intermediate portion, and lower and wider in the front and rear sides. Therefore, the fitting property with respect to the depression at the base of the leg is further improved.

以上のとおり、本発明によれば、前述の問題点を解決できる、等の利点がもたらされる。 As described above, according to the present invention, there are advantages such as being able to solve the above-mentioned problems.

展開状態のパンツタイプ使い捨ておむつの平面図（内面側）である。It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. 展開状態のパンツタイプ使い捨ておむつの平面図（外面側）である。It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. 展開状態のパンツタイプ使い捨ておむつの要部平面図（外面側）である。It is a principal part top view (outer surface side) of the underpants type disposable diaper of an unfolded state. 図１のＣ−Ｃ断面図である。It is CC sectional drawing of FIG. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. パンツタイプ使い捨ておむつの装着状態の斜視図である。It is a perspective view of the wearing state of a pants type disposable diaper. 弾性部材のカットパターンを示す平面図である。It is a top view which shows the cut pattern of an elastic member. 図１のＡ−Ａ断面図（収縮状態）である。It is AA sectional drawing (contracted state) of FIG. 展開状態のパンツタイプ使い捨ておむつの要部平面図（外面側）である。It is a principal part top view (outer surface side) of the underpants type disposable diaper of an unfolded state. 展開状態のパンツタイプ使い捨ておむつの要部平面図（外面側）である。It is a principal part top view (outer surface side) of the underpants type disposable diaper of an unfolded state. 展開状態のパンツタイプ使い捨ておむつの要部平面図（外面側）である。It is a principal part top view (outer surface side) of the underpants type disposable diaper of an unfolded state. 展開状態のパンツタイプ使い捨ておむつの要部平面図（外面側）である。It is a principal part top view (outer surface side) of the underpants type disposable diaper of an unfolded state.

以下、本発明の一実施形態について、添付図面を参照しつつ詳説する。なお、用語「伸長率」は自然長を１００％としたときの値を意味する。また、図中の点模様部分はホットメルト接着剤等の接合手段を示している。
図１〜図７はパンツタイプ使い捨ておむつを示している。このパンツタイプ使い捨ておむつ（以下、単におむつともいう。）は、前身頃Ｆ及び後身頃Ｂをなす外装体２０と、この外装体２０の内面に固定され一体化された内装体１０とを有しており、内装体１０は液透過性表面シート１１と液不透過性裏面側シート１２との間に吸収体１３が介在されてなるものである。製造に際しては、外装体２０の内面（上面）に対して内装体１０の裏面がホットメルト接着剤などの接合手段によって接合された後に、内装体１０および外装体２０が前身頃Ｆ及び後身頃Ｂの境界である縦方向（前後方向）中央で折り畳まれ、その両側部が相互に熱溶着またはホットメルト接着剤などによって接合されてサイドシール部２１が形成されることによって、ウエスト開口部及び左右一対のレッグ開口部が形成されたパンツタイプ使い捨ておむつとなる。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The term “elongation rate” means a value when the natural length is 100%. Moreover, the dot pattern part in a figure has shown joining means, such as a hot-melt-adhesive.
1 to 7 show a pants-type disposable diaper. This pants-type disposable diaper (hereinafter also simply referred to as a diaper) has an exterior body 20 that forms a front body F and a back body B, and an interior body 10 that is fixed to and integrated with the inner surface of the exterior body 20. The interior body 10 is formed by interposing an absorbent body 13 between a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12. In manufacturing, after the back surface of the interior body 10 is joined to the inner surface (upper surface) of the exterior body 20 by a joining means such as a hot melt adhesive, the interior body 10 and the exterior body 20 are the front body F and the back body B. Is folded at the center in the longitudinal direction (front-rear direction), and the side seal portions 21 are formed by joining both sides thereof by heat welding or hot melt adhesive, thereby forming a waist opening and a pair of left and right This is a pants-type disposable diaper in which a leg opening is formed.

（内装体の構造例）
内装体１０は、図５〜図７に示すように、不織布などからなる液透過性表面シート１１と、ポリエチレン等からなる液不透過性裏面側シート１２との間に、吸収体１３を介在させた構造を有しており、表面シート１１を透過した排泄液を吸収保持するものである。 (Structural example of interior body)
As shown in FIGS. 5 to 7, the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable back side sheet 12 made of polyethylene or the like. The excretory fluid that has permeated through the top sheet 11 is absorbed and retained.

吸収体１３の表面側（肌当接面側）を覆う液透過性表面シート１１としては、有孔または無孔の不織布や多孔性プラスチックシートなどが好適に用いられる。不織布を構成する素材繊維は、ポリエチレンまたはポリプロピレン等のオレフィン系、ポリエステル系、ポリアミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンレース法、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工法によって得られた不織布を用いることができる。これらの加工法の内、スパンレース法は柔軟性、ドレープ性に富む点で優れ、サーマルボンド法は嵩高でソフトである点で優れている。液透過性表面シート１１に多数の透孔を形成した場合には、尿などが速やかに吸収されるようになり、ドライタッチ性に優れたものとなる。液透過性表面シート１１は、吸収体１３の側縁部を巻き込んで吸収体１３の裏面側まで延在している。 As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. When a large number of through holes are formed in the liquid permeable surface sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The liquid permeable top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

吸収体１３の裏面側（非肌当接面側）を覆う液不透過性裏面側シート１２は、ポリエチレンまたはポリプロピレンなどの液不透過性プラスチックシートが用いられるが、近年はムレ防止の点から透湿性を有するものが好適に用いられる。この遮水・透湿性シートは、たとえばポリエチレンやポリプロピレン等のオレフィン樹脂中に無機充填材を溶融混練してシートを形成した後、一軸または二軸方向に延伸することにより得られる微多孔性シートである。 As the liquid-impermeable back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13, a liquid-impermeable plastic sheet such as polyethylene or polypropylene is used. Those having wettability are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

吸収体１３としては、公知のもの、例えばパルプ繊維の積繊体、セルロースアセテート等のフィラメントの集合体、あるいは不織布を基本とし、必要に応じて高吸収性ポリマーを混合、固着等してなるものを用いることができる。この吸収体１３は、形状及びポリマー保持等のため、必要に応じてクレープ紙等の、液透過性及び液保持性を有する包装シート１４によって包装することができる。
吸収体１３の形状は、股間部に前後両側よりも幅の狭い括れ部分１３Ｎを有する略砂時計状に形成される。括れ部分１３Ｎの寸法は適宜定めることができるが、括れ部分１３Ｎの前後方向長さはおむつ全長の２０〜５０％程度とすることができ、その最も狭い部分の幅は吸収体１３の全幅の４０〜６０％程度とすることができる。 Absorbent body 13 is a known one, for example, a pulp fiber stack, a filament aggregate such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. Can be used. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.
The shape of the absorber 13 is formed in a substantially hourglass shape having a narrowed portion 13N narrower than the front and rear sides at the crotch portion. Although the size of the constricted portion 13N can be determined as appropriate, the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about -60%.

内装体１０の両側部には脚周りにフィットする立体ギャザーＢＳが形成されている。この立体ギャザーＢＳは、図５及び図６に示されるように、内装体の裏面の側部に固定された固定部と、この固定部から内装体の側方を経て内装体の表面の側部まで延在する本体部と、本体部の前後端部が倒伏状態で内装体の表面の側部に固定されて形成された倒伏部分と、この倒伏部分間が非固定とされて形成された自由部分とが、折返しによって二重シートとしたギャザー不織布１５により形成されている。 A solid gather BS that fits around the legs is formed on both sides of the interior body 10. As shown in FIGS. 5 and 6, the three-dimensional gather BS includes a fixed portion fixed to a side portion on the back surface of the interior body, and a side portion on the surface of the interior body from the fixed portion to the side of the interior body. The body part that extends to the front, the front and rear ends of the body part in a lying state, and the lying part that is fixed to the side of the surface of the interior body, and the freedom part that is formed with this lying part being unfixed The portion is formed of a gathered nonwoven fabric 15 that is turned into a double sheet by folding.

また、二重シート間には、自由部分の先端部等に細長状ギャザー弾性部材１６が配設されている。ギャザー弾性部材１６は、製品状態において図５に二点鎖線で示すように、弾性伸縮力により吸収体側縁部より突出する不織布部分を起立させて立体ギャザーＢＳを形成するためのものである。 Further, between the double sheets, an elongated gather elastic member 16 is disposed at the tip of the free part. The gather elastic member 16 is for forming a three-dimensional gather BS by raising a non-woven fabric portion protruding from the absorber side edge by elastic stretching force as shown by a two-dot chain line in FIG. 5 in the product state.

液不透過性裏面側シート１２は、二重シート状のギャザー不織布１５の内部まで進入し、図５に示されるように、立体ギャザーＢＳの下端側において防漏壁を構成するようになっている。この液不透過性裏面側シート１２としては、排便や尿などの褐色が出ないように不透明のものを用いるのが望ましい。不透明化としては、プラスチック中に、炭酸カルシウム、酸化チタン、酸化亜鉛、ホワイトカーボン、クレイ、タルク、硫酸バリウムなどの顔料や充填材を内添してフィルム化したものが好適に使用される。 The liquid-impermeable back side sheet 12 enters the inside of the double sheet-like gathered nonwoven fabric 15 and constitutes a leak-proof wall on the lower end side of the three-dimensional gathered BS as shown in FIG. . As the liquid-impermeable back side sheet 12, it is desirable to use an opaque sheet so that brown such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

ギャザー弾性部材１６としては、通常使用されるスチレン系ゴム、オレフィン系ゴム、ウレタン系ゴム、エステル系ゴム、ポリウレタン、ポリエチレン、ポリスチレン、スチレンブタジエン、シリコン、ポリエステル等の素材を用いることができる。また、外側から見え難くするため、太さは９２５ｄｔｅｘ以下、テンションは１５０〜３５０％、間隔は７．０ｍｍ以下として配設するのがよい。なお、ギャザー弾性部材１６としては、図示形態のような糸状の他、ある程度の幅を有するテープ状のものを用いることもできる。 As the gathered elastic member 16, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 7.0 mm or less. The gathered elastic member 16 may be a tape-like member having a certain width in addition to the thread-like shape shown in the figure.

前述のギャザー不織布１５を構成する素材繊維も液透過性表面シート１１と同様に、ポリエチレンまたはポリプロピレン等のオレフィン系、ポリエステル系、アミド系等の合成繊維の他、レーヨンやキュプラ等の再生繊維、綿等の天然繊維とすることができ、スパンボンド法、サーマルボンド法、メルトブローン法、ニードルパンチ法等の適宜の加工方法に得られた不織布を用いることができるが、特にはムレを防止するために坪量を抑えて通気性に優れた不織布を用いるのがよい。さらにギャザー不織布１５については、尿などの透過を防止するとともに、カブレを防止しかつ肌への感触性（ドライ感）を高めるために、シリコン系、パラフィン金属系、アルキルクロミッククロイド系撥水剤などをコーティングした撥水処理不織布を用いるのが望ましい。 In the same manner as the liquid-permeable surface sheet 11, the material fibers constituting the gathered nonwoven fabric 15 are olefin-based, polyester-based, amide-based synthetic fibers such as polyethylene or polypropylene, regenerated fibers such as rayon and cupra, and cotton. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a nonwoven fabric that suppresses the basis weight and has excellent air permeability. Furthermore, for the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent, etc. It is desirable to use a water-repellent non-woven fabric coated with.

内装体１０の平面形状は略長方形とされており、その結果として吸収体１３の括れ部分１３Ｎと対応する部分に、吸収体１３を有しない余り部分１９が形成されている。このような余り部分が形成される限り、内装体１０の形状は特に限定されない。 The planar shape of the interior body 10 is substantially rectangular, and as a result, a surplus portion 19 that does not have the absorber 13 is formed in a portion corresponding to the constricted portion 13N of the absorber 13. As long as such a surplus portion is formed, the shape of the interior body 10 is not particularly limited.

（外装体の構造例）
外装体２０は、図４〜図６にも示されるように、それぞれ上層不織布２０Ａ及び下層不織布２０Ｂ（つまり、この形態では下層不織布が最外側不織布となる）からなる２層構造の不織布シートとされ、上層不織布２０Ａと下層不織布２０Ｂとの間、及び下層不織布２０Ｂをウエスト開口縁で内面側に折り返してなる折り返し部分２０Ｃの不織布間に各種弾性部材が配設され、伸縮性が付与されている。平面形状は、中間両側部にそれぞれレッグ開口部を形成するために形成された凹状の脚回りライン２９により、全体として擬似砂時計形状をなしている。 (External body structure example)
As shown in FIGS. 4 to 6, the outer package 20 is a non-woven sheet having a two-layer structure composed of an upper layer non-woven fabric 20A and a lower layer non-woven fabric 20B (that is, in this embodiment, the lower layer non-woven fabric is the outermost non-woven fabric). Various elastic members are disposed between the upper layer nonwoven fabric 20A and the lower layer nonwoven fabric 20B, and between the nonwoven fabrics of the folded portion 20C formed by folding the lower layer nonwoven fabric 20B to the inner surface side at the waist opening edge, thereby imparting elasticity. The planar shape has a pseudo hourglass shape as a whole by the concave leg periphery lines 29 formed to form the leg openings on both sides of the middle.

図示形態の外装体２０においては、弾性部材として、図１〜図３に示される展開形状において、ウエスト開口部近傍２３に配置されたウエスト部弾性部材２４と、前身頃Ｆ及び後身頃Ｂに、縦方向に間隔をおいて幅方向に沿って配置された複数の腰回り弾性部材２５とを有するとともに、前身頃Ｆ及び後身頃Ｂのそれぞれにおいて、腰回り弾性部材群２５とは別に、一方のサイドシール部２１から一方のレッグ開口部に沿って股間部に向かい、股間部を横断し、かつ他方のレッグ開口部に沿って他方のサイドシール部２１に至るパターンで湾曲しつつ延在する、互いに交差することなく間隔をおいて配置された複数本の湾曲弾性部材２６，２８を備えている。これら、弾性部材２４〜２８は、それぞれその延在方向に沿って所定の伸長率で伸長された状態で固定されている。なお、本外装体２０では、脚回りライン２９に沿って前身頃Ｆのサイドシール部から後身頃Ｂのサイドシール部まで連続する、所謂脚回り弾性部材は設けられていない。 In the exterior body 20 of the illustrated form, as an elastic member, in the developed shape shown in FIGS. 1 to 3, the waist elastic member 24 disposed in the vicinity of the waist opening 23, the front body F and the back body B, A plurality of waistline elastic members 25 arranged in the width direction at intervals in the vertical direction, and in each of the front body F and the back body B, separately from the waistline elastic member group 25, Extending from the side seal portion 21 along the one leg opening to the crotch portion, crossing the crotch portion, and extending while curving in a pattern extending to the other side seal portion 21 along the other leg opening portion, A plurality of curved elastic members 26 and 28 are provided so as to be spaced from each other without crossing each other. These elastic members 24 to 28 are fixed in a state of being stretched at a predetermined stretch rate along their extending directions. In addition, in this exterior body 20, what is called a leg periphery elastic member which continues from the side seal part of the front body F to the side seal part of the back body B along the leg periphery line 29 is not provided.

ウエスト部弾性部材２４は、前身頃Ｆと後身頃Ｂとが接合されたサイドシール部２１の範囲の内、ウエスト開口縁近傍に縦方向に間隔をおいて配置された複数条の糸ゴム等の細長状弾性部材であり、身体のウエスト部回りを締め付けるように伸縮力を与えることによりおむつを身体に装着するためのものである。このウエスト部弾性部材２４は、図示例では糸ゴムを用いたが、例えばテープ状の伸縮部材を用いてもよい。また、図示形態のウエスト部弾性部材２４は、ウエスト部における下層不織布２０Ｂの折り返し部分２０Ｃの不織布間に挟持されているが、上層不織布２０Ａと下層不織布２０Ｂとの間に挟持しても良い。 The waist elastic member 24 includes a plurality of thread rubbers and the like disposed in the vicinity of the waist opening edge in the vicinity of the waist opening edge in the range of the side seal portion 21 where the front body F and the back body B are joined. It is an elongated elastic member for attaching a diaper to the body by applying an expansion / contraction force so as to tighten around the waist of the body. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used. Moreover, although the waist part elastic member 24 of illustration form is clamped between the nonwoven fabrics of the folding | returning part 20C of the lower layer nonwoven fabric 20B in a waist part, you may clamp between 20 A of upper layer nonwoven fabrics, and the lower layer nonwoven fabric 20B.

腰回り弾性部材２５は、サイドシール部２１の内、概ね上部から下部までの範囲に亘り、縦方向に間隔をおいて配置された糸ゴム等の細長状弾性部材であり、前身頃Ｆ及び後身頃Ｂの腰回り部分に夫々幅方向の伸縮力を与え、おむつを身体に密着させるためのものである。なお、ウエスト部弾性部材２４と腰回り弾性部材２５との境界は必ずしも明確でなくてよい。例えば、前身頃Ｆ及び後身頃Ｂに縦方向に間隔をおいて幅方向に配置された弾性部材の内、数は特定できなくても、上部側の何本かがウエスト部弾性部材として機能し、残りの弾性部材が腰回り弾性部材として機能していればよい。 The waist elastic member 25 is an elongated elastic member such as a rubber thread, which is disposed in the side seal portion 21 in a vertical direction over a range from the upper part to the lower part. The body B is provided with an elastic force in the width direction on the waist portion of the body B, so that the diaper is in close contact with the body. Note that the boundary between the waist elastic member 24 and the waist elastic member 25 is not necessarily clear. For example, even if the number of the elastic members arranged in the width direction with the front body F and the back body B spaced apart in the vertical direction cannot be specified, some of the upper members function as the waist elastic members. The remaining elastic members only have to function as waist elastic members.

後身頃Ｂにおいて、腰回り弾性部材２５とは別に配設された背側湾曲弾性部材２６は、糸ゴム等の細長状弾性部材であり、所定の曲線に沿って配置されている。背側湾曲弾性部材２６は、一本であっても良いが複数本であるのが好ましく、図示例では５本の糸ゴム等の細長状弾性部材であり、これら背側湾曲弾性部材２６は互いに交差することなく、間隔をおいて配置されている。この背側湾曲弾性部材群２６は、２，３本程度の弾性部材を間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように３〜２０ｍｍ、好ましくは６〜１６ｍｍ程度の間隔を空けて、３本以上、好ましくは５本以上配置される。 In the back body B, the dorsal curved elastic member 26 arranged separately from the waist elastic member 25 is an elongated elastic member such as rubber thread, and is arranged along a predetermined curve. There may be one dorsal curved elastic member 26, but it is preferable that there are a plurality of dorsal curved elastic members 26. In the illustrated example, the elastic elastic members 26 are elongated elastic members such as five rubber threads. They are arranged at intervals without crossing. This dorsal curved elastic member group 26 is not arranged as a bundle of about two or three elastic members with a close interval, but 3-20 mm so as to form a predetermined stretch zone, Preferably, 3 or more, preferably 5 or more are arranged with an interval of about 6 to 16 mm.

外装体２０の前身頃Ｆにおいて、腰回り弾性部材群２５とは別に配設された腹側湾曲弾性部材２８は糸ゴム等の細長状弾性部材であり、所定の曲線に沿って配置されている。腹側湾曲弾性部材２８は、一本であっても良いが複数本であるのが好ましく、図示例では５本の糸状弾性部材であり、これら腹側湾曲弾性部材２８は、互いに交差することなく、間隔をおいて配置されている。この腹側湾曲弾性部材群２８も、２，３本程度の弾性部材を間隔を密にして実質的に一束として配置されるのではなく、所定の伸縮ゾーンを形成するように３〜２０ｍｍ、好ましくは６〜１６ｍｍ程度の間隔を空けて、３本以上、好ましくは５本以上配置される。 In the front body F of the exterior body 20, the abdomen curved elastic member 28 arranged separately from the waist elastic member group 25 is an elongated elastic member such as rubber thread, and is arranged along a predetermined curve. . There may be one ventral curved elastic member 28, but preferably there are a plurality of ventricular curved elastic members 28. In the illustrated example, there are five thread-like elastic members, and these ventral curved elastic members 28 do not cross each other. , Spaced apart. This ventral curved elastic member group 28 is also arranged in a bundle of about two or three elastic members at a close interval and substantially in a bundle, but 3 to 20 mm so as to form a predetermined stretch zone, Preferably, 3 or more, preferably 5 or more are arranged with an interval of about 6 to 16 mm.

なお、図示例では、前身頃Ｆ及び後身頃Ｂに配置された腰回り弾性部材２５及び湾曲弾性部材２６，２８は、図８及び図９に示すように、製造時に外装体に対して連続的に固定した後に、内装体と重なる部分の一部または全部が、所定の切断パターンＣＰで細かく切断されて収縮力が作用しない非収縮部分（つまり、図８及び図９の切断パターンＣＰと重なる部分）とされ、この非収縮部分より側方に湾曲しつつ延在する部分が収縮力の作用する収縮部分（つまり、図８及び図９の切断パターンＣＰより側方の、腰回り弾性部材２５及び湾曲弾性部材２６，２８が連続的に残された部分）とされている。このため、腰回り弾性部材２５及び湾曲弾性部材２６，２８は、一方側のサイドシール部２１から内装体１０を横切って他方（反対）側のサイドシール部２１まで連続的に設けた後に、内装体と重なる部分の一部または全部が、細かく切断される。これにより、内装体（特に吸収体１３）の幅方向の縮こまりをより防止することができる。もちろん、腰回り弾性部材２５及び湾曲弾性部材２６，２８を、内装体１０を横切って連続的に配置することもできる。 In the illustrated example, the waist elastic member 25 and the curved elastic members 26 and 28 arranged in the front body F and the back body B are continuous with the exterior body during manufacture, as shown in FIGS. After being fixed to the inner body, a part or all of the portion overlapping the interior body is finely cut with a predetermined cutting pattern CP and the contraction force does not act (that is, the portion overlapping the cutting pattern CP of FIGS. 8 and 9) The portion extending while curving to the side from the non-contracted portion is a contracted portion on which a contracting force acts (that is, the waist elastic member 25 and the waist elastic member 25 on the side of the cutting pattern CP in FIGS. 8 and 9). The curved elastic members 26 and 28 are continuously left). For this reason, the waist elastic member 25 and the curved elastic members 26 and 28 are continuously provided from the side seal portion 21 on one side across the interior body 10 to the side seal portion 21 on the other side (opposite side). Part or all of the part that overlaps the body is finely cut. Thereby, the shrinkage | contraction of the width direction of an interior body (especially absorber 13) can be prevented more. Of course, the waist elastic member 25 and the curved elastic members 26 and 28 can also be arranged continuously across the interior body 10.

上述した外装体２０は、例えば特開平４−２８３６３号公報や、特開平１１−３３２９１３号公報記載の技術により製造することができる。また、湾曲弾性部材２６，２８を内装体１０上で切断し不連続化するには、特開２００２−３５０２９号公報、特開２００２−１７８４２８号公報及び特開２００２-２７３８０８号公報に記載される切断方法が好適に採用される。 The exterior body 20 mentioned above can be manufactured by the technique of Unexamined-Japanese-Patent No. 4-28363 or Unexamined-Japanese-Patent No. 11-332913, for example. Moreover, in order to cut | disconnect the curved elastic members 26 and 28 on the interior body 10, it describes in Unexamined-Japanese-Patent No. 2002-35029, Unexamined-Japanese-Patent No. 2002-178428, and Unexamined-Japanese-Patent No. 2002-273808. A cutting method is preferably employed.

図示例とは異なり、湾曲弾性部材２６，２８を、前身頃Ｆ及び後身頃Ｂのいずれか一方にのみ設けるだけでも良い。また、湾曲弾性部材２６，２８を、前身頃Ｆ及び後身頃Ｂの両方に設ける場合、前身頃Ｆ側に配置された湾曲弾性部材の群の一部又は全部と、後身頃Ｂ側に配置された湾曲弾性部材Ｂの群の一部又は全部とが交差する形態（図示せず）も採用できるが、図示例のように、前身頃Ｆ側に配置された湾曲弾性部材２８の群と、後身頃Ｂ側に配置された湾曲弾性部材Ｂの群とは互いに交差することなく前後方向中間部、特に前身頃Ｆに若干偏った位置で縦方向に離間している形態が好適であり、その縦方向離間範囲９０における最小縦方向離間距離は１０〜１５ｍｍ程度とし、この部分に後述する広幅の固定領域を設けるのが好ましい。 Unlike the illustrated example, the curved elastic members 26 and 28 may be provided only on one of the front body F and the back body B. When the curved elastic members 26 and 28 are provided on both the front body F and the back body B, the curved elastic members 26 and 28 are disposed on the back body B side and a part or all of the group of curved elastic members disposed on the front body F side. Although a form (not shown) in which a part or all of the group of curved elastic members B intersected can be adopted, the group of curved elastic members 28 arranged on the front body F side, as shown in the example, A configuration in which the curved elastic members B arranged on the body B side are separated from each other in the longitudinal direction at a position slightly deviated from the front-rear intermediate portion, particularly the front body F without crossing each other is preferable. It is preferable that the minimum longitudinal separation distance in the direction separation range 90 is about 10 to 15 mm, and a wide fixed region described later is provided in this portion.

さらに、湾曲弾性部材２６，２８はその全体が湾曲していなくても良く、部分的に直線状の部分を有していても良い。 Further, the curved elastic members 26 and 28 do not have to be entirely curved, and may partially have a linear portion.

弾性部材２４〜２８の固定時の伸長率は適宜定めることができるが、通常の成人用の場合、ウエスト部弾性部材２４は２３０〜３２０％程度、腰回り弾性部材２５は２３０〜３２０％程度、湾曲弾性部材２６，２８は２３０〜３２０％程度とすることができる。 The elongation rate at the time of fixing the elastic members 24 to 28 can be appropriately determined. However, in the case of a normal adult, the waist elastic member 24 is about 230 to 320%, the waist elastic member 25 is about 230 to 320%, The curved elastic members 26 and 28 can be about 230 to 320%.

（前後押えシート）
図１及び図４にも示されるように、外装体２０の内面上に取り付けられた内装体１０の前後端部をカバーし、且つ内装体１０の前後縁からの漏れを防ぐために、前後押えシート５０，６０が設けられている。図示形態について更に詳細に説明すると、前押えシート５０は、前身頃Ｆ内面のうちウエスト側端部の折り返し部分２０Ｃの内面から内装体１０の前端部と重なる位置まで幅方向全体にわたり延在しており、後押えシート６０は、後身頃Ｂ内面のうちウエスト側端部の折り返し部分２０Ｃの内面から内装体１０の後端部と重なる位置まで幅方向全体にわたり延在している。前後押えシート５０，６０の股下側縁部に幅方向の全体にわたり（中央部のみでも良い）若干の非接着部分を設けると、接着剤が食み出ないだけでなく、この部分を表面シートから若干浮かせて防漏壁として機能させることができる。 (Front / rear presser sheet)
As shown in FIGS. 1 and 4, in order to cover the front and rear end portions of the interior body 10 mounted on the inner surface of the exterior body 20 and to prevent leakage from the front and rear edges of the interior body 10, 50, 60 are provided. The illustrated embodiment will be described in more detail. The front presser sheet 50 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end portion to the position overlapping the front end portion of the interior body 10 in the inner surface of the front body F. The rear presser sheet 60 extends across the entire width direction from the inner surface of the folded portion 20C at the end on the waist side to the position overlapping the rear end of the interior body 10 in the inner surface of the back body B. If a slight non-adhesive portion is provided in the crotch side edges of the front and rear presser sheets 50, 60 over the entire width direction (or only the central portion), not only the adhesive does not stick out, but also this portion is removed from the surface sheet. It can be lifted slightly to function as a leak-proof wall.

図示形態のように、前後押えシート５０，６０を別体として取り付けると、素材選択の自由度が高くなる利点があるものの、資材や製造工程が増加する等のデメリットもある。そのため、外装体２０をおむつ内面に折り返してなる折り返し部分２０Ｃを、吸収パッド２００と重なる部分まで延在させて、前述の押えシート５０，６０と同等の部分を形成することもできる。 When the front and rear presser sheets 50 and 60 are attached as shown in the figure, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. For this reason, the folded portion 20C formed by folding the outer package 20 on the inner surface of the diaper can be extended to a portion overlapping the absorbent pad 200 to form a portion equivalent to the presser sheets 50 and 60 described above.

（内装体と外装体との接合、股間フィット弾性部材）
特徴的には、図３に拡大して示すように、内装体１０と外装体２０との接合に際して、内装体１０の余り部分１９と重なる領域内に内装体１０と外装体２０とが固定されていない非接合箇所３１（平面図中点模様の無い白抜き箇所）が前後方向に延在され、この非接合箇所３１の幅方向両側に接合箇所３２（平面図中点模様の箇所）が設けられている。また、この内装体１０の非接合箇所３１を幅方向に収縮させる股間フィット弾性部材２７が外装体２０に設けられている。これにより、図９に示すように、股間フィット弾性部材２７の収縮作用によって内装体１０の余り部分１９はその非接合箇所３１がおむつ表面側に襞状に隆起しつつ幅方向に収縮する。つまり、内装体１０の余り部分１９は規則的な幅方向収縮変形により、厚みが増加し、剛性が高まり、幅は減少する。その結果、内装体１０の余り部分１９は、吸収体１３が無い割には厚みがあり幅も狭いため、尿が流れ込み難くなり、漏れが発生し難くなる。また、襞状に隆起した余り部分１９が尿の幅方向移動を阻止する機能を果たす。しかも、この襞状に隆起した余り部分１９内に液不透過性シートが内蔵されるため、襞状の隆起による尿の移動阻止性能は非常に高い。よって、尿の流れ込み難さと相まって、横漏れ防止性能がより一層のものとなる。さらに、内装体１０の余り部分１９は規則的変形により幅方向に収縮して高剛性となるために、不規則変形によるフィット性の低下が防止されるとともに、内装体１０の表面の両側部に立体ギャザーを有する場合には、立体ギャザーが強固に支持され、股間に対するフィット性の低下が防止される。特に、図示形態の立体ギャザーは、吸収体１３の括れ部分１３Ｎによる支持力の低下の影響を受け易いものであるが、その影響を低減することができる。 (Join between interior body and exterior body, crotch fit elastic member)
Characteristically, as shown in an enlarged view in FIG. 3, when the interior body 10 and the exterior body 20 are joined, the interior body 10 and the exterior body 20 are fixed in a region overlapping the excess portion 19 of the interior body 10. A non-joined part 31 (a white spot without a dot pattern in the plan view) that extends is extended in the front-rear direction, and joint parts 32 (dots in the plan view) are provided on both sides in the width direction of the non-joint part 31. It has been. Further, a crotch fitting elastic member 27 for contracting the non-joined portion 31 of the interior body 10 in the width direction is provided on the exterior body 20. As a result, as shown in FIG. 9, the surplus portion 19 of the interior body 10 contracts in the width direction while the non-joint portion 31 is raised like a bowl on the diaper surface side by the contraction action of the crotch fitting elastic member 27. That is, the surplus portion 19 of the interior body 10 increases in thickness, increases in rigidity, and decreases in width due to regular contraction deformation in the width direction. As a result, the surplus portion 19 of the interior body 10 is thick and narrow with respect to the absence of the absorber 13, so that urine does not easily flow in and leakage hardly occurs. Further, the surplus portion 19 raised in a bowl shape functions to prevent movement of the urine in the width direction. Moreover, since the liquid-impermeable sheet is built in the surplus portion 19 that is raised like a bowl, the ability to prevent urine from moving due to the bowl-like rise is very high. Therefore, coupled with difficulty of urine flow, the side leakage prevention performance is further improved. Furthermore, since the excess portion 19 of the interior body 10 contracts in the width direction due to regular deformation and becomes highly rigid, a decrease in fit due to irregular deformation is prevented, and both sides of the surface of the interior body 10 are prevented. When it has a three-dimensional gather, a three-dimensional gather is supported firmly and the fall of the fitting property with respect to a crotch is prevented. In particular, the three-dimensional gather in the illustrated form is easily affected by a decrease in support force due to the constricted portion 13N of the absorber 13, but the influence can be reduced.

内装体１０の非接合箇所３１は、図示例では、幅方向全体が内装体１０の余り部分１９内に収まる寸法・位置とされているが、吸収体１３の側縁部と重なる部位まで幅方向中央側に延在していても良い。よって、幅方向中央側の接合箇所３２は、図示例では内装体１０の余り部分１９内に収まる寸法・位置とされているが、吸収体１３と重なる部位に位置していても良い。また、側方の接合箇所３２は、図示例では外装体２０の側縁部に合わせているが、外装体２０の側縁部から幅方向中央側に離間していても良い。内装体１０の非接合箇所３１の幅寸法は特に限定されないが、通常の場合、内装体１０の余り部分１９の幅の５０〜１００％程度とすることができる。 In the illustrated example, the non-joint portion 31 of the interior body 10 is dimensioned and positioned within the remainder portion 19 of the interior body 10 in the width direction, but extends to the portion overlapping the side edge of the absorber 13. It may extend to the center side. Therefore, the joint portion 32 on the center side in the width direction is set to a size / position that fits in the excess portion 19 of the interior body 10 in the illustrated example, but may be located at a portion overlapping the absorber 13. Further, in the illustrated example, the side joint portion 32 is aligned with the side edge portion of the exterior body 20, but may be separated from the side edge portion of the exterior body 20 toward the center in the width direction. Although the width dimension of the non-joining location 31 of the interior body 10 is not particularly limited, it can be about 50 to 100% of the width of the excess portion 19 of the interior body 10 in a normal case.

非接合箇所３１は、内装体１０の余り部分１９の前後方向全体にわたり延在していても良いが、中間部（図示例）、前側、後側等、一部にのみ設けても良い。非接合箇所３１の前後方向長さは適宜定めることができるが、内装体１０の余り部分１９の前後方向長さの５０〜１００％程度とすることができる。 The non-joining part 31 may extend over the entire front-rear direction of the surplus portion 19 of the interior body 10, but may be provided only in a part such as an intermediate part (illustrated example), front side, rear side, and the like. Although the length in the front-rear direction of the non-joined portion 31 can be determined as appropriate, it can be about 50 to 100% of the length in the front-rear direction of the remaining portion 19 of the interior body 10.

また、非接合箇所３１は前後方向及び幅方向の少なくとも一方において複数個所設けても良い。 Moreover, you may provide the non-joining location 31 in multiple places in at least one of the front-back direction and the width direction.

これら非接合箇所３１及び接合箇所３２以外の領域の接合パターンは特に限定されないが、図示例では内装体１０の余り部分１９における非接合箇所３１を除き、外装体２０の最小幅と略同じ幅で内装体１０の前後方向全体にわたり内装体１０と外装体２０とが接合されている。このように非接合箇所３１及び接合箇所３２は内装体１０の余り部分１９の外まで連続させることができる。 The bonding patterns in the regions other than the non-joining places 31 and the joining places 32 are not particularly limited. In the illustrated example, except for the non-joining places 31 in the surplus portion 19 of the interior body 10, the joint pattern has substantially the same width as the minimum width of the exterior body 20. The interior body 10 and the exterior body 20 are joined over the entire front-rear direction of the interior body 10. Thus, the non-joining part 31 and the joining part 32 can be continued to the outside of the excess part 19 of the interior body 10.

股間フィット弾性部材２７は、内装体１０の非接合箇所３１を幅方向に収縮させる限りその形状は特に限定されず、シート状や網状の弾性部材を用いることもできるが、図示形態のように、糸ゴム等の細長状弾性部材が縦方向に４〜１２ｍｍ程度の所定の間隔で複数配置される形態は、ウエスト部弾性部材２４や腰回り弾性部材２５と同じ工程で取り付けることができるため、一つの好ましい形態である。また、湾曲弾性部材２６，２８を、内装体１０の余り部分１９を通過させる配置とし、この通過部分を股間フィット弾性部材２７とすることも可能である。通常の場合、股間フィット弾性部材２７に用いる細長状弾性部材としては、太さ４００〜９２５ｄｔｅｘ程度の糸ゴムを用いることができ、これを２５０〜４００％程度伸長した状態で、外装体２０のシート間に固定することが望ましい。 The shape of the crotch fit elastic member 27 is not particularly limited as long as the non-joint portion 31 of the interior body 10 is contracted in the width direction, and a sheet-like or net-like elastic member can be used. A configuration in which a plurality of elongated elastic members such as thread rubber are arranged at predetermined intervals of about 4 to 12 mm in the vertical direction can be attached in the same process as the waist elastic member 24 and the waist elastic member 25. One preferred form. Further, the curved elastic members 26 and 28 may be arranged so as to pass the surplus portion 19 of the interior body 10, and the passing portion may be the crotch fit elastic member 27. In a normal case, as the elongated elastic member used for the crotch fitting elastic member 27, a rubber thread having a thickness of about 400 to 925 dtex can be used, and the sheet of the exterior body 20 is stretched about 250 to 400%. It is desirable to fix between.

股間フィット弾性部材２７は、図示例では、非接合箇所３１を挟んで一方の接合箇所３２から他方の接合箇所３２まで延在されているが、これに限定されず、非接合箇所３１内に収まる幅としても良い。また、図示形態では、股間フィット弾性部材２７は、吸収体１３と重なる範囲には設けられていない（切断されて収縮力が作用しない）が、吸収体１３の側縁部まで連続させると、吸収体１３を支えとして収縮力が作用する点では好ましいものとなる。また、股間フィット弾性部材２７の幅方向外側の端部は内装体１０の側縁までとしても良いが、図示形態のように内装体１０の側縁よりも外装体２０の側部がはみ出す領域では外装体２０の側縁まで延在させても良い。 In the illustrated example, the crotch fitting elastic member 27 extends from one joint location 32 to the other joint location 32 across the non-joint location 31, but is not limited to this and fits in the non-joint location 31. It is good also as width. Further, in the illustrated embodiment, the crotch fitting elastic member 27 is not provided in a range overlapping with the absorbent body 13 (but is not cut and contraction force does not act). This is preferable in that the contraction force acts on the body 13 as a support. Moreover, although the edge part of the width direction outer side of the crotch fitting elastic member 27 is good also to the side edge of the interior body 10, in the area | region where the side part of the exterior body 20 protrudes rather than the side edge of the interior body 10 like illustration form. You may extend to the side edge of the exterior body 20. FIG.

図３、図１０〜図１３は、いくつかの好ましい形態を示している。図３に示す形態では、内装体１０の余り部分１９の前後方向中間部において、接合箇所３２が内装体１０の余り部分１９と重なる領域の両側縁部にそれぞれ設けられ、これら接合箇所３２の間の全体が非接合箇所３１とされている。この形態では、図9に示すように、内装体１０の余り部分１９全体によって一つの高い襞状隆起が形成される。よって、襞状隆起の高さによる尿移動阻止機能を重視する場合に好ましい形態である。また幅方向収縮量を多くできる形態である。 3 and 10 to 13 show some preferred forms. In the form shown in FIG. 3, in the front-rear direction intermediate portion of the surplus portion 19 of the interior body 10, joint portions 32 are respectively provided on both side edges of the region overlapping the surplus portion 19 of the interior body 10. Is the non-joined portion 31. In this embodiment, as shown in FIG. 9, one high bowl-shaped ridge is formed by the entire remainder portion 19 of the interior body 10. Therefore, it is a preferable form when importance is attached to the function of preventing urine movement due to the height of the ridge-like ridge. Moreover, it is the form which can increase the amount of shrinkage in the width direction.

また、図１０に示す形態は、股間フィット弾性部材２７により収縮される非接合箇所３１が、脚周り方向に沿って連続的に設けられている形態である。また、図１１に示す形態は、股間フィット弾性部材２７により収縮される非接合箇所３１が、脚周り方向に沿って間欠的に設けられている形態である。このため、図１１に示す形態では、股間フィット弾性部材２７により収縮される非接合箇所３１が、内装体１０の余り部分１９と重なる領域の前後両側では幅方向外側に設けられ（幅方向内側の非接合箇所は収縮しない）、中間では幅方向内側に設けられている。この形態では、内装体１０の余り部分１９によって形成される襞状隆起、及び幅方向収縮により形成される高剛性部がともに脚周りに沿って形成される。よって、脚周りに対するフィット性がより一層のものとなる。 Further, the form shown in FIG. 10 is a form in which the non-joined portion 31 contracted by the crotch fitting elastic member 27 is continuously provided along the leg-surrounding direction. Moreover, the form shown in FIG. 11 is a form in which the non-joining location 31 contracted by the crotch fitting elastic member 27 is provided intermittently along the leg circumference direction. For this reason, in the form shown in FIG. 11, the non-joined portion 31 contracted by the crotch fitting elastic member 27 is provided on the outer side in the width direction on both the front and rear sides of the region overlapping the excess portion 19 of the interior body 10 (the inner side in the width direction). The non-joined part does not shrink), and is provided inside in the width direction in the middle. In this form, both the ridge-like ridge formed by the excess portion 19 of the interior body 10 and the high-rigidity portion formed by contraction in the width direction are formed along the legs. Therefore, the fit with respect to the leg periphery is further improved.

図１２に示すように、股間フィット弾性部材２７により収縮される非接合箇所３１を、接合箇所３２を挟んで幅方向に複数設けることもできる。この形態では、内装体１０の余り部分１９によって襞状隆起が幅方向に複数形成される。よって、襞状隆起の高さよりも数による尿移動阻止機能を重視する場合に好ましい形態である。特に、図１２に示す形態では、内装体１０の余り部分１９の前後方向中間部において、前後両側には幅方向中間に接合箇所３２を設けずに単数の非接合箇所３１を有する領域を形成し、それらの間に複数の非接合箇所３１を有する領域を形成している。これにより、襞状隆起が脚の付け根部の窪みに適合した形状、すなわち前後方向中間部ほど低くかつ幅広く、前後両側ほど高くかつ狭く形成される。 As shown in FIG. 12, a plurality of non-joined portions 31 contracted by the crotch fitting elastic member 27 can be provided in the width direction with the joint portion 32 interposed therebetween. In this form, a plurality of bowl-shaped ridges are formed in the width direction by the surplus portion 19 of the interior body 10. Therefore, this is a preferred form when emphasizing the function of preventing urine movement by number rather than the height of the ridge-like ridge. In particular, in the form shown in FIG. 12, in the middle part in the front-rear direction of the surplus portion 19 of the interior body 10, a region having a single non-joint part 31 is formed on both front and rear sides without providing the joint part 32 in the middle in the width direction. A region having a plurality of non-joining points 31 is formed between them. As a result, the shape of the ridge-like ridge is adapted to the depression at the base of the leg, that is, lower and wider at the front and rear direction intermediate portion, and higher and narrower at the front and rear sides.

図１３に示す形態は、股間フィット弾性部材２７により収縮される非接合箇所３１が、前後方向中間から前後両側に向かうにつれて幅が広くなる形状に形成されているものである。この形態では、内装体１０の余り部分１９によって形成される襞状隆起が、脚の付け根部の窪みに適合した形状、すなわち前後方向中間部ほど低くかつ幅広く、前後両側ほど高くかつ狭く形成される。よって、脚付け根部の窪みに対するフィット性がより一層のものとなる。 In the form shown in FIG. 13, the non-joined portion 31 contracted by the crotch fitting elastic member 27 is formed in a shape that becomes wider as it goes from the middle in the front-rear direction to both the front-rear sides. In this embodiment, the ridge-like ridge formed by the surplus portion 19 of the interior body 10 is formed in a shape suitable for the depression at the base of the leg, that is, lower and wider at the front and rear direction intermediate portion, and higher and narrower at the front and rear sides. . Therefore, the fitting property with respect to the depression at the base of the leg is further improved.

本発明は、上記例のようなパンツタイプ使い捨ておむつにおいて利用できるものである。 The present invention can be used in a pants-type disposable diaper as in the above example.

Ｂ…後身頃、Ｆ…前身頃、１０…内装体、１１…液透過性表面シート、１２…液不透過性裏面側シート、１３…吸収体、１４…包装シート、１５…ギャザー不織布、１６…ギャザー弾性部材、２０…外装体、２０Ｃ…折り返し部分、２１…サイドシール部、２４…ウエスト部弾性部材、２５…腰回り弾性部材、２６，２８…湾曲弾性部材、２６…背側湾曲弾性部材、２７…股間フィット弾性部材、２８…腹側湾曲弾性部材、２９…脚回りライン、１３Ｎ…括れ部分、１９…余り部分、３１…非接合箇所、３２…接合箇所。 B ... Back body, F ... Front body, 10 ... Interior body, 11 ... Liquid permeable top sheet, 12 ... Liquid impervious back side sheet, 13 ... Absorber, 14 ... Packaging sheet, 15 ... Gathered nonwoven fabric, 16 ... Gather elastic member, 20 ... exterior body, 20C ... folded portion, 21 ... side seal part, 24 ... waist elastic member, 25 ... waist elastic member, 26, 28 ... curved elastic member, 26 ... dorsal curved elastic member, 27 ... Crotch fit elastic member, 28 ... Ventral curved elastic member, 29 ... Leg circumference line, 13N ... Constricted part, 19 ... Surplus part, 31 ... Non-joining part, 32 ... Joining part.

Claims

<Invention of Claim 1>
An exterior body extending from the wearer's abdomen to the back through the crotch, and an interior body including an absorbent body fixed to the inner surface of the exterior body,
A waist opening and a pair of left and right leg openings were formed by joining both side edges on the ventral side of the exterior body and both side edges on the back side of the exterior body,
In pants-type disposable diapers,
In the crotch portion of the absorbent body, a narrowed portion narrower than both front and rear sides is formed, and in the interior body, a surplus portion not having an absorbent body is formed in a portion corresponding to the narrowed portion of the absorbent body. Has been
A non-joined portion where the interior body and the exterior body are not fixed is extended in the front-rear direction in a region overlapping with a surplus portion of the interior body, and joint portions are provided on both sides in the width direction of the non-joined portion, A crotch fitting elastic member for contracting the non-joined portion of the interior body in the width direction is provided in the exterior body.
A pants-type disposable diaper characterized by that.

The fixed part fixed to the side part of the back surface of the interior body, the main body part extending from the fixed part to the side part of the surface of the interior body through the side of the interior body, and the front and rear ends of the body part are lying down A lying part fixed to the side of the surface of the interior body in a state, a free part formed by non-fixing the inside of the lying part, and provided at the front end of the free part along the front-rear direction The pants-type disposable diaper according to claim 1, wherein a three-dimensional gather having a formed elastic member is provided on both sides of the interior body.

The interior body includes a liquid-impermeable sheet that covers a back side of the absorber, and a side edge portion of the liquid-impermeable sheet extends to a remaining portion of the interior body. 2. Pants-type disposable diapers as described in 2.

The joint portion is provided at each side edge portion of the region overlapping with the remainder of the interior body or in the vicinity thereof, and the entire portion between the joint portions is a non-joint portion that is contracted by the crotch fitting elastic member. The underpants type disposable diaper of any one of Claims 1-3.

The non-joining location contracted by the crotch fitting elastic member is provided in a plurality in the width direction across the joining location in a region overlapping with a surplus portion of the interior body. The pants-type disposable diaper described in the item.

The pants-type disposable diaper according to any one of claims 1 to 5, wherein the non-joined portion contracted by the crotch fitting elastic member is provided continuously or intermittently along a leg-circumferential direction.

The pants-type disposable according to any one of claims 1 to 5, wherein the non-joint portion contracted by the crotch fitting elastic member is formed in a shape that increases in width from the middle in the front-rear direction to both the front and rear sides. Diapers.