JP3856941B2 - Absorbent articles - Google Patents

Absorbent articles Download PDF

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Publication number
JP3856941B2
JP3856941B2 JP10485998A JP10485998A JP3856941B2 JP 3856941 B2 JP3856941 B2 JP 3856941B2 JP 10485998 A JP10485998 A JP 10485998A JP 10485998 A JP10485998 A JP 10485998A JP 3856941 B2 JP3856941 B2 JP 3856941B2
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Japan
Prior art keywords
absorbent article
sheet
absorbent
contact surface
skin contact
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JP10485998A
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Japanese (ja)
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JPH11299821A (en
Inventor
淳 村井
宏典 河崎
浩美 滝田
奈美江 糸井
稔 中西
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Kao Corp
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Kao Corp
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【発明の属する技術分野】
【0001】
本発明は、フィット性に優れ、ヨレ防止、漏れ防止性能が高い、生理用ナプキンや失禁パッドなどの吸収性物品に関する。
【0002】
【従来の技術及び発明の解決しようとする課題】
従来より、生理用ナプキンや失禁パッドなどの吸収性物品としては、液透過性の表面層、液不透過性の防漏層及び両層の間に介在する液保持性の吸収層を具備し、実質的に縦長に形成されてなるものが広く用いられている。
このような吸収性物品は、フィット性を高くして漏れを防止することが要求されており、種々提案がなされている。
【0003】
例えば、特表平7−502438号公報や特開平7−446号公報において、吸収層の幅方向外方に弾性部材を配して、吸収層と離隔された中空のループを有する吸収性物品が提案されている。
しかし、このように吸収層から離隔されたループを有するものは、その大きさを十分なフィット性を得られる程度とすることができず、また、装着者の足の動き等の左右からの応力がかかった場合においても、ループ部分で緩衝できず、吸収層に直接応力がかかりヨレが発生し、漏れ防止性が十分ではなかった。
【0004】
従って、本発明の目的は、フィット性が高く、ヨレ防止、漏れ防止性に優れた吸収性物品を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、上記課題を解消すべく検討した結果、吸収層の左右両側縁部に弾性シートを設けて、吸収層の両側縁部に中空の中空部を形成してなる吸収性物品が、上記目的を達成しうることを知見した。
【0006】
本発明は、液透過性の表面層、液不透過性の防漏層及び両層の間に介在する液保持性の吸収層を具備し、実質的に縦長に形成されてなる吸収性物品において、上記吸収性物品の左右両側縁部には、それぞれ帯状の伸縮性を有する弾性シートが、それらの両側縁を上記吸収層の側縁よりも吸収性物品の内方に位置するように配設され、該弾性シートにより左右一対のループ状の中空部が形成されており、上記弾性シートは、上記吸収性物品の長手方向に伸張した状態で該吸収性物品の肌当接面側及び/又は非肌当接面側に固定されており、上記弾性シートの収縮力により、上記吸収性物品の長手方向においては、肌当接面側に凹に湾曲しており、該吸収性物品の幅方向においては、左右一対の上記中空部がそれぞれ肌当接面から上方に向けて起立していることを特徴とする吸収性物品を提供するものである。
【0007】
【発明の実施の形態】
以下、本発明の吸収性物品について図面を参照して更に詳細に説明する。
ここで、図1は、本発明の吸収性物品の第1の実施形態としての生理用ナプキンを示す斜視図であり、図2は、図1のII-II 断面図であり、図3は、図1のIII-III 断面図である。
【0008】
図1〜3に示す第1の実施形態の生理用ナプキン1は、液透過性の表面層2としての表面シート21液不透過性の防漏層4としての裏面シート41及び両層の間に介在する液保持性の吸収層3としての吸収体31を具備し、実質的に縦長に形成されてなる。
【0009】
而して、本実施形態の生理用ナプキン1においては、ナプキンの左右両側縁部3a,3bに、それぞれ、帯状の弾性シート51が、それらの両側縁51a,51bが吸収体31の側縁31a,31bよりも生理用ナプキン1の内方に位置するように配設され、該弾性シートにより左右一対のループ状の中空部5が形成されている。
【0010】
更に詳述すると、一対の上記中空部5,5は、それぞれナプキン1の肌当接面から上方にむけて起立された状態を有する。即ち、本形態においては、上記弾性シート51は、伸縮性を有し、ナプキン1の長手方向に伸張した状態で該ナプキン1の肌当接面側及び非肌当接面側に固定されており、上記中空部5は、弾性シート51,51の収縮力により、上方に向けて起立している。また、生理用ナプキン1は、図1に示すようにカップ状となされている。即ち、長手方向においては、図3に示すように、肌当接面側に凹に湾曲しており、幅方向においては、図2に示すように、左右の中空部5が起立しているため、全体としてカップ状になっている。
ここで、「起立」は、ループ状の中空部の上面(最も上方に位置する部位)が肌当接面(表面シート21)よりも上方に位置する状態を意味し、好ましくは、中空部が傾斜した形態となってかかる状態となっている状態を意味する。
また、図2及び3に示すように、吸収体31は、厚さが薄く大きい下層吸収体32と、該下層吸収体32の中央部に載置されて、生理用ナプキンの中央部に凸状の隆起部34を形成する上層吸収体33とからなる。
表面シート21は、吸収体31の左右両側縁部を覆うように、側縁部が生理用ナプキン1の側部において吸収体31の裏面側に位置するように配されている。また、裏面シート1 は、吸収体31よりも幅広に形成されている。生理用ナプキン1の長手方向両端部においては、表面シート21と裏面シート41とが直接接合されている。尚、接合は、ヒートシールや接着剤を介する等して行うことができるが、本形態においては、ヒートシールにより接合している。
【0011】
そして、弾性シート51は、吸収体31の左右両側縁部3a,3bに、それぞれ一枚づつ配されている。各弾性シート51は、表面シート21及び吸収体31を狭持するように一側縁51aが肌当接面側の表面に位置し、他側縁51bが表面シート21と裏面シート41との間に位置するように配されている。弾性シート51における他側縁51b側は裏面シート41にも接着されているが、裏面シート41と当接する部分がすべて接着されている必要はなく、本形態においては、吸収体31が存在する領域までは接着されているが、その外方においては接着されていない。
中空部5は、楕円形状であり、吸収体31の斜め上方に向けて起立されている。
【0012】
中空部5の外周長さL(図2参照、他の部材に固定されていない部分の長さ)は、好ましくは20〜80mmである。
外周長さLが、20mm未満であると、フィット性が低下したり、ヨレ防止効果が不十分となる場合があり、80mmを超えると、ループ形状が大きすぎ、股間にフィットしずらくなる場合があるので好ましくない。
中空部の高さは、好ましくは5〜40mmである。
高さが、5mm未満であると、生理用ナプキン全体としてのカップ形状が損なわれ、漏れ防止効果がなくなる場合があり、40mmを超えると、生理用ナプキン中央部のフィット性が損なわれる場合があるので、好ましくない。
【0013】
図1に示すように、上層吸収体33の周縁部分、生理用ナプキン1の側部から両端部にかけて、更には弾性シート51の一側縁部51aにおいて、溝部6が設けられている。この溝部6により、液流れが防止されると共に、吸収体の形状や弾性シートの接合状態が良好に維持される。
裏面シートの表面には、粘着剤が塗布されてずれ止め部7が形成されている。
【0014】
次いで、生理用ナプキンを構成する各部材の形成材料等について説明する。
表面シート21、裏面シート41及び吸収体31の形成材料としては、通常、生理用ナプキンなど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。
【0015】
上記弾性シートは、伸縮性を有するのが好ましく、ループ形状をつくった時、ループ形状を形成し、このループ形状を保ちながら違和感がなく自在に変形する剛性を持つことが必要である。また、液不透過性を有するのが好ましい。
上記弾性シートの伸縮物性は、生理用ナプキンの長手方向において、5〜50%伸張した時の応力が50〜500gf/25mmが好ましく、100〜300gf/幅25mmがより好ましい。応力が50gf/25mm未満では、伸張力が弱すぎ、ループが上方に起立せず、また長手方向に好ましい湾曲が得られず、フィット性が不十分となってしまい、応力が500gf/幅25mmをこえると長手方向で湾曲がきつくなってしまい、同様にフィット性が低下するので好ましくない。
【0016】
次に、弾性シートの剛性は、バルクソフトネス値で5〜200gfが好ましく、10〜100gfがより好ましい。バルクソフトネス値が5gf未満であると、柔らかすぎループ形状を安定に保てず、200gfを超えると、装着時に自在に変形しなかったり、違和感となるので好ましくない。
尚、バルクソフトネスは、下記の如く測定できる。
即ち、弾性シートを長手方向に150mm、幅方向に30mmの大きさの帯状体として切り出し、この帯状体の長手方向両端を5mm重ね合わせ、円筒状になる様にし、この重ね合わせた部分を側縁(円筒の上下縁)からほぼ10mmの位置にステープルで2ヶ所固定する。
次いで、テンシロン圧縮試験機にて、圧縮速度10mm/分の速度で圧縮し、円筒が座屈するまでの最大圧縮強度を測定する。測定回数5回の平均値をとって、バルクソフトネス値とする。
【0017】
弾性シートの伸縮材としては、上記伸縮物性及び剛性を有するシート材料であれば特に限定されるものではないが、例えば、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、天然ゴム、ポリウレタン、ポリエチレン−アクリル酸エチル等のエチレン−αオレフィン共重合体等からなるフィルム、不織布、織物、発泡体等が挙げられる。
また、上記弾性シートは、ナプキンの両サイドで肌に直接触れるものであり、肌触り等を考慮すると、フィルム等よりも不織布材料の方が好ましい。
また、伸縮性のフィルムにおいても、肌触りや吸収材や表面材とのヒートシール性及び剛性を向上する目的で、他のポリスチレン/ポリエステル、ポリエチレン/ポリプロピレン、ポリプロピレンからなる熱可塑性不織布と積層し積層材として用いても良い。この様な不織布を用いる場合、不織布自体も伸縮材を有するものが好ましく、繊維自身がクリンプしているもので不織布化する事が好ましく、伸縮性に乏しい不織布においては、予め伸縮性フィルムをある伸びまで伸張させ、伸張させた伸縮性フィルムに伸張されていない不織布を重ね合わせ、これらの層を合わせてホットメルトやヒートシールにより接着して全体が伸縮するシートとして用いても良い。
そして、生理用ナプキンの長手方向における肌当接面側に凹状に湾曲する湾曲率としては、曲率半径rが好ましくは50〜300mm、より好ましくは100〜200mmとなるようにするのが望ましい。曲率半径rが50mm未満では、ナプキンが湾曲しすぎフィット性が低下したりショーツにつけずらくなったりして好ましくなく、300mmを超えると、身体への好ましいフィト性が得られ難くなり好ましくない。
【0018】
上述の如く構成されてなる本形態の生理用ナプキン1は、その使用時においてずれ止め部7を介してショーツなどの下着に装着して使用される。
そして、常に身体にフィットした状態で保持でき、隙間をつくらず経血を吸収可能なため、特に横漏れ防止性に優れたものである。
具体的には、上記中空部5は弾性シートにより形成されているため、使用時において着用者が動いても該中空部が自在に変形し装着部位に隙間が生じるのを防止して、体にフィットする。また、着用者が歩行するなどして吸収性物品の幅方向からの応力を受けた場合でも、中空部が応力を受けて緩和するため、吸収体の受ける応力が小さくてすむため、よれ難く、フィット性が高く、漏れを生じにくい。この効果は、特に弾性シートが直接吸収体に接合されている場合に顕著である。
【0019】
本形態の生理用ナプキン1は、吸収体31を表面シート21で包装した後、これらの左右両側縁部3a,3bに弾性シート51を配し、さらに裏面側に裏面シート41を配して、最終にエンボス加工するなどして所定の溝部を形成することにより、得ることができる。
【0020】
以下に、図4〜7を参照して、本発明の他の実施形態について説明する。
ここで、図4〜7は、それぞれ、本発明の吸収性物品の他の形態の要部を示す断面図(図2と同様に生理用ナプキンを長手方向中央で切断した断面における側部を拡大して示す図)である。
尚、以下の説明においては、上述した第1の実施形態と異なる点について特に説明する。特に説明しない点については、上述した説明が適宜適用される。
【0021】
図4に示す第2の形態の生理用ナプキン1は、長手方向ほぼ中央部の裏面シート41が幅方向外方に向けて延出されて左右一対のウイング部8が形成されてなる、いわゆるウイング型のナプキンである。
【0022】
図5に示す第3の形態の生理用ナプキン1は、弾性シート51の両側縁51a,51bが共に表面シート21の上方に位置するように配されており、表面シート21と裏面シート41とは、吸収体31の側縁外方においてヒートシールされて接合されている。
【0023】
図6に示す第4の形態の生理用ナプキン1は、弾性シート51の両側縁51a,51bが共に吸収体31と表面シート21との間に位置するようになされている。また、表面シート21は、吸収体の肌当接面側を覆うに止まり、裏面シート41が吸収体31の側面を覆って表面側に位置しており、弾性シート51の両側縁51a,51bは、共に裏面シート41と表面シート21とより挟持固定されている。
【0024】
図7に示す第5の形態の生理用ナプキン1は、弾性シート51の一側縁51aが吸収体31と表面シート21との間に位置し、他側縁51bが吸収体31と裏面シート41との間に位置するようになされている。また、吸収体31の側面に表面シート21や裏面シート41は存在しないようになされている。
【0025】
尚、本発明の吸収性物品は、上述の形態に制限されず、本発明の趣旨を逸脱しない範囲で種々変更が可能である。
例えば、第1〜5の形態において、溝部6を設けない形態とすることができる。また、第5の形態において、他側縁51bを裏面シート41の表面に位置させたり、一側縁51aを表面シート21の表面に位置させると共に他側縁51bを裏面シート41の表面に位置させる形態としてもよい。
【0026】
【発明の効果】
本発明の吸収性物品は、フィット性及びヨレ防止、漏れ防止性に優れ、特に横漏れを効果的に防止することができるものである。
【図面の簡単な説明】
【図1】図1は、本発明の吸収性物品の一形態を示す斜視図である。
【図2】図2は、図1のII-II 断面図である。
【図3】図3は、図1のIII-III 断面図である。
【図4】図4は、本発明の吸収性物品の他の形態の要部を示す断面図である。
【図5】図5は、本発明の吸収性物品の他の形態の要部を示す断面図である。
【図6】図6は、本発明の吸収性物品の他の形態の要部を示す断面図である。
【図7】図7は、本発明の吸収性物品の他の形態を示す断面図である。
【符号の説明】
1 生理用ナプキン
2 表面層
21 表面シート
3 吸収層
3a,3b 側縁部
31 吸収体
31a,31b 側縁
32 下層吸収体
33 上層吸収体
34 隆起部
4 防漏層
41 裏面シート
5 中空部
51 弾性シート
51a,51b 側縁
6 溝部
7 ずれ止め部
BACKGROUND OF THE INVENTION
[0001]
The present invention relates to an absorbent article such as a sanitary napkin or an incontinence pad, which has excellent fit, and has high twist prevention and leakage prevention performance.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, as absorbent articles such as sanitary napkins and incontinence pads, a liquid-permeable surface layer, a liquid-impermeable leak-proof layer and a liquid-retaining absorbent layer interposed between the two layers are provided. What is formed substantially vertically long is widely used.
Such absorbent articles are required to have high fit and prevent leakage, and various proposals have been made.
[0003]
For example, in Japanese Patent Application Laid-Open No. 7-502438 and Japanese Patent Application Laid-Open No. 7-446, an absorbent article having a hollow loop that is spaced apart from the absorbent layer by arranging an elastic member outward in the width direction of the absorbent layer. Proposed.
However, those having a loop separated from the absorbent layer as described above cannot have a size that can provide sufficient fit, and stress from the left and right such as the movement of the wearer's foot. Even when it was applied, it could not be buffered at the loop portion, and stress was applied directly to the absorption layer, resulting in twisting, and the leakage prevention property was not sufficient.
[0004]
Accordingly, an object of the present invention is to provide an absorbent article that has high fit and is excellent in preventing twisting and leakage.
[0005]
[Means for Solving the Problems]
As a result of studying to solve the above problems, the present inventors have provided an absorbent article in which elastic sheets are provided on both left and right side edges of the absorbent layer, and hollow hollow parts are formed on both side edges of the absorbent layer. It has been found that the above object can be achieved.
[0006]
The present invention relates to an absorbent article comprising a liquid-permeable surface layer, a liquid-impermeable leak-proof layer, and a liquid-retaining absorbent layer interposed between the two layers and formed substantially vertically. In the left and right side edges of the absorbent article, elastic sheets having a belt-like stretchability are disposed so that both side edges are located inward of the absorbent article rather than the side edges of the absorbent layer. The elastic sheet forms a pair of left and right loop-shaped hollow portions, and the elastic sheet extends in the longitudinal direction of the absorbent article and / or the skin contact surface side of the absorbent article and / or It is fixed to the non-skin contact surface side and is curved concavely toward the skin contact surface side in the longitudinal direction of the absorbent article due to the contraction force of the elastic sheet, and the width direction of the absorbent article In this case, the pair of left and right hollow portions are raised upward from the skin contact surface. It is intended to provide an absorbent article, characterized in that.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the absorbent article of the present invention will be described in more detail with reference to the drawings.
Here, FIG. 1 is a perspective view showing a sanitary napkin as a first embodiment of the absorbent article of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1.
[0008]
The sanitary napkin 1 according to the first embodiment shown in FIGS. 1 to 3 includes a surface sheet 21 as a liquid-permeable surface layer 2, a back sheet 41 as a liquid-impermeable leak-proof layer 4, and a gap between both layers. It has an absorbent body 31 as an intervening liquid-retaining absorbent layer 3 and is formed substantially vertically.
[0009]
Thus, in the sanitary napkin 1 of the present embodiment, the belt-like elastic sheets 51 are respectively provided on the left and right side edges 3 a and 3 b of the napkin, and the both side edges 51 a and 51 b are the side edges 31 a of the absorber 31. , 31b is disposed so as to be located inward of the sanitary napkin 1, and a pair of left and right loop-shaped hollow portions 5 are formed by the elastic sheet.
[0010]
More specifically, each of the pair of hollow portions 5 and 5 has a state of standing upward from the skin contact surface of the napkin 1. That is, in the present embodiment, the elastic sheet 51 has elasticity and is fixed to the skin contact surface side and the non-skin contact surface side of the napkin 1 in a state of being stretched in the longitudinal direction of the napkin 1. The hollow portion 5 is erected upward due to the contraction force of the elastic sheets 51, 51. The sanitary napkin 1 has a cup shape as shown in FIG. That is, in the longitudinal direction, as shown in FIG. 3, it is concavely curved toward the skin contact surface side, and in the width direction, the left and right hollow portions 5 are erected as shown in FIG. The whole is cup-shaped.
Here, “standing” means a state in which the upper surface of the loop-shaped hollow portion (the uppermost portion) is positioned above the skin contact surface (surface sheet 21), preferably the hollow portion is It means a state that is in an inclined form and is in such a state.
As shown in FIGS. 2 and 3, the absorbent body 31 is mounted on the lower absorbent body 32 having a large thickness and a central portion of the lower absorbent body 32, and is convex at the central portion of the sanitary napkin. And an upper layer absorber 33 that forms the raised portion 34 of the upper layer.
The top sheet 21 is arranged so that the side edge portion is located on the back side of the absorbent body 31 at the side portion of the sanitary napkin 1 so as to cover the left and right side edges of the absorbent body 31. Further, the back sheet 1 is formed wider than the absorber 31. At both ends in the longitudinal direction of the sanitary napkin 1, the top sheet 21 and the back sheet 41 are directly joined. In addition, although joining can be performed via a heat seal or an adhesive agent, in this embodiment, it joins by heat seal.
[0011]
The elastic sheets 51 are arranged one by one on the left and right side edges 3a and 3b of the absorber 31, respectively. Each elastic sheet 51 has one side edge 51 a located on the surface on the skin contact surface side so as to sandwich the top sheet 21 and the absorber 31, and the other side edge 51 b between the top sheet 21 and the back sheet 41. It is arranged to be located in. The other side edge 51b side of the elastic sheet 51 is also bonded to the back sheet 41, but it is not necessary that all the portions that contact the back sheet 41 are bonded, and in this embodiment, the region where the absorber 31 exists. Is bonded, but not on the outside.
The hollow portion 5 has an elliptical shape and is erected obliquely above the absorber 31.
[0012]
The outer peripheral length L of the hollow portion 5 (see FIG. 2, the length of the portion not fixed to another member) is preferably 20 to 80 mm.
If the outer peripheral length L is less than 20 mm, the fit may be reduced or the twist prevention effect may be insufficient. If it exceeds 80 mm, the loop shape is too large to fit between the crotch. This is not preferable.
The height of the hollow portion is preferably 5 to 40 mm.
If the height is less than 5 mm, the cup shape of the sanitary napkin as a whole may be impaired, and the leakage prevention effect may be lost. If the height exceeds 40 mm, the fit of the sanitary napkin center may be impaired. Therefore, it is not preferable.
[0013]
As shown in FIG. 1, a groove portion 6 is provided in the peripheral portion of the upper layer absorbent body 33, from the side portion to both end portions of the sanitary napkin 1, and in the one side edge portion 51 a of the elastic sheet 51. The groove 6 prevents liquid flow and maintains the shape of the absorber and the joined state of the elastic sheet.
On the surface of the back sheet, a pressure-sensitive adhesive is applied to form a shift preventing portion 7.
[0014]
Next, materials for forming each member constituting the sanitary napkin will be described.
As a material for forming the topsheet 21, the backsheet 41, and the absorber 31, any material that can be used for absorbent articles such as sanitary napkins can be used without particular limitation.
[0015]
The elastic sheet preferably has stretchability, and when the loop shape is formed, the elastic sheet needs to have a rigidity that allows the loop shape to be formed and freely deformed without any sense of incongruity while maintaining the loop shape. Further, it preferably has liquid impermeability.
Regarding the stretchable physical properties of the elastic sheet, the stress when stretched 5 to 50% in the longitudinal direction of the sanitary napkin is preferably 50 to 500 gf / 25 mm, more preferably 100 to 300 gf / width 25 mm. If the stress is less than 50 gf / 25 mm, the stretching force is too weak, the loop does not stand up, and a preferable curve in the longitudinal direction cannot be obtained, resulting in insufficient fit, and the stress is 500 gf / width 25 mm. Exceeding this is not preferable because the curve becomes tight in the longitudinal direction and the fitting property is similarly reduced.
[0016]
Next, the rigidity of the elastic sheet is preferably 5 to 200 gf, more preferably 10 to 100 gf in terms of bulk softness value. If the bulk softness value is less than 5 gf, the loop shape is too soft to be stable, and if it exceeds 200 gf, it is not preferable because it does not deform freely or becomes uncomfortable when worn.
Bulk softness can be measured as follows.
That is, the elastic sheet is cut out as a strip having a size of 150 mm in the longitudinal direction and 30 mm in the width direction, and both ends of the strip in the longitudinal direction are overlapped with each other by 5 mm so as to form a cylindrical shape. Two places are fixed with staples at a position of about 10 mm from the upper and lower edges of the cylinder.
Next, the sample is compressed with a Tensilon compression tester at a compression rate of 10 mm / min, and the maximum compressive strength until the cylinder buckles is measured. The average value of 5 measurements is taken as the bulk softness value.
[0017]
The elastic material of the elastic sheet is not particularly limited as long as it is a sheet material having the above-mentioned elastic properties and rigidity. For example, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, natural rubber, polyurethane , A film made of an ethylene-α olefin copolymer such as polyethylene-ethyl acrylate, a non-woven fabric, a woven fabric, a foam, and the like.
Moreover, the said elastic sheet is what touches skin directly on both sides of a napkin, and when the touch etc. are considered, the nonwoven fabric material is more preferable than a film etc.
In addition, even stretchable films are laminated with other thermoplastic non-woven fabrics made of polystyrene / polyester, polyethylene / polypropylene, and polypropylene for the purpose of improving the heat sealability and rigidity with the absorbent material and surface material. It may be used as When such a non-woven fabric is used, the non-woven fabric itself preferably has an elastic material, and it is preferable that the fiber itself is crimped to be made into a non-woven fabric. The stretched stretchable film may be stretched to a non-woven fabric that is not stretched, and these layers may be combined and bonded together by hot melt or heat sealing to be used as a sheet that stretches as a whole.
And as a curvature which curves to the skin contact surface side in the longitudinal direction of a sanitary napkin, it is desirable that the curvature radius r is preferably 50 to 300 mm, more preferably 100 to 200 mm. If the radius of curvature r is less than 50 mm, the napkin will be too curved and the fit will be lowered and it will be difficult to attach to the shorts, and if it exceeds 300 mm, it will be difficult to obtain a good fit to the body.
[0018]
The sanitary napkin 1 of the present embodiment configured as described above is used by being attached to underwear such as shorts via the stopper 7 during use.
And since it can always hold | maintain in the state fitted to the body and can absorb menstrual blood without creating a clearance gap, it is particularly excellent in side leakage prevention.
Specifically, since the hollow portion 5 is formed of an elastic sheet, even when the wearer moves during use, the hollow portion can be freely deformed to prevent a gap from being generated in the wearing portion, and To fit. In addition, even when the wearer walks and receives stress from the width direction of the absorbent article, since the hollow portion receives stress and relaxes, the stress received by the absorber is small, so it is difficult to twist, High fit and hardly leaks. This effect is particularly remarkable when the elastic sheet is directly bonded to the absorber.
[0019]
The sanitary napkin 1 according to the present embodiment, after packaging the absorbent body 31 with the top sheet 21, arranges the elastic sheet 51 on the left and right side edges 3a, 3b, and further arranges the back sheet 41 on the back side, Finally, it can be obtained by embossing to form a predetermined groove.
[0020]
Hereinafter, another embodiment of the present invention will be described with reference to FIGS.
Here, FIGS. 4 to 7 are cross-sectional views showing the main parts of other forms of the absorbent article of the present invention (the side portions in the cross section obtained by cutting the sanitary napkin at the center in the longitudinal direction similarly to FIG. 2). FIG.
In the following description, differences from the above-described first embodiment will be particularly described. The points described above are appropriately applied to points that are not particularly described.
[0021]
The sanitary napkin 1 according to the second embodiment shown in FIG. 4 is a so-called wing in which a back sheet 41 at a substantially central portion in the longitudinal direction is extended outward in the width direction to form a pair of left and right wing portions 8. A type of napkin.
[0022]
The sanitary napkin 1 of the third embodiment shown in FIG. 5 is arranged so that both side edges 51a and 51b of the elastic sheet 51 are located above the top sheet 21, and the top sheet 21 and the back sheet 41 are The outer edge of the absorber 31 is heat-sealed and joined.
[0023]
The sanitary napkin 1 according to the fourth embodiment shown in FIG. 6 is configured such that both side edges 51 a and 51 b of the elastic sheet 51 are positioned between the absorber 31 and the top sheet 21. Further, the top sheet 21 stops only covering the skin contact surface side of the absorber, the back sheet 41 covers the side surface of the absorber 31 and is positioned on the front side, and both side edges 51a and 51b of the elastic sheet 51 are Both of them are clamped and fixed by the back sheet 41 and the top sheet 21.
[0024]
In the sanitary napkin 1 of the fifth embodiment shown in FIG. 7, one side edge 51 a of the elastic sheet 51 is located between the absorber 31 and the top sheet 21, and the other side edge 51 b is the absorber 31 and the back sheet 41. It is made to be located between. Further, the top sheet 21 and the back sheet 41 are not present on the side surfaces of the absorber 31.
[0025]
In addition, the absorbent article of this invention is not restrict | limited to the above-mentioned form, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, in the 1st-5th form, it can be set as the form which does not provide the groove part 6. FIG. In the fifth embodiment, the other side edge 51b is positioned on the surface of the back sheet 41, the one side edge 51a is positioned on the surface of the top sheet 21, and the other side edge 51b is positioned on the surface of the back sheet 41. It is good also as a form.
[0026]
【The invention's effect】
The absorbent article of the present invention is excellent in fit, twist prevention, and leakage prevention properties, and can effectively prevent side leakage in particular.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of an absorbent article of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
FIG. 4 is a cross-sectional view showing the main part of another embodiment of the absorbent article of the present invention.
FIG. 5 is a cross-sectional view showing the main part of another embodiment of the absorbent article of the present invention.
FIG. 6 is a cross-sectional view showing the main part of another embodiment of the absorbent article of the present invention.
FIG. 7 is a cross-sectional view showing another embodiment of the absorbent article of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Surface layer 21 Surface sheet 3 Absorption layer 3a, 3b Side edge part 31 Absorber 31a, 31b Side edge 32 Lower layer absorber 33 Upper layer absorber 34 Raised part 4 Leak-proof layer 41 Back surface sheet 5 Hollow part 51 Elasticity Sheet 51a, 51b Side edge 6 Groove part 7 Slip prevention part

Claims (3)

液透過性の表面層、液不透過性の防漏層及び両層の間に介在する液保持性の吸収層を具備し、実質的に縦長に形成されてなる吸収性物品において、上記吸収性物品の左右両側縁部には、それぞれ帯状の伸縮性を有する弾性シートが、それらの両側縁を上記吸収層の側縁よりも吸収性物品の内方に位置するように配設され、該弾性シートにより左右一対のループ状の中空部が形成されており、
上記弾性シートは、上記吸収性物品の長手方向に伸張した状態で該吸収性物品の肌当接面側及び/又は非肌当接面側に固定されており、上記弾性シートの収縮力により、上記吸収性物品の長手方向においては、肌当接面側に凹に湾曲しており、幅方向においては、左右一対の上記中空部がそれぞれ肌当接面から上方に向けて起立していることを特徴とする吸収性物品。
In an absorbent article comprising a liquid-permeable surface layer, a liquid-impermeable leak-proof layer, and a liquid-retaining absorbent layer interposed between the two layers, and formed substantially vertically, the absorptivity On the left and right side edges of the article, elastic sheets having a belt-like stretchability are arranged so that both side edges are located inward of the absorbent article with respect to the side edges of the absorbent layer. A pair of left and right loop-shaped hollow portions are formed by the sheet,
The elastic sheet is fixed to the skin contact surface side and / or the non-skin contact surface side of the absorbent article in a state of being stretched in the longitudinal direction of the absorbent article, and due to the contraction force of the elastic sheet, In the longitudinal direction of the absorbent article, it is concavely curved toward the skin contact surface side, and in the width direction, the pair of left and right hollow portions stand up from the skin contact surface. Absorbent article characterized by.
上記中空部の外周長さは、20〜80mmであることを特徴とする請求項1記載の吸収性物品。  The absorbent article according to claim 1, wherein an outer peripheral length of the hollow portion is 20 to 80 mm. 上記中空部の高さは、5〜40mmであることを特徴とする請求項1記載の吸収性物品。  The absorbent article according to claim 1, wherein a height of the hollow portion is 5 to 40 mm.
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