JP3725008B2 - Absorbent articles - Google Patents

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JP3725008B2
JP3725008B2 JP2000186934A JP2000186934A JP3725008B2 JP 3725008 B2 JP3725008 B2 JP 3725008B2 JP 2000186934 A JP2000186934 A JP 2000186934A JP 2000186934 A JP2000186934 A JP 2000186934A JP 3725008 B2 JP3725008 B2 JP 3725008B2
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leak
proof wall
proof
liquid
projecting portion
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JP2002000656A (en
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哲哉 草川
仁子 野口
宏典 河崎
美次 濱島
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Kao Corp
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Kao Corp
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【0001】
【発明の属する技術分野】
本発明は、生理用ナプキンや失禁パッド等の吸収性物品に関し、更に詳しくはフィット性が高く、液漏れが防止された吸収性物品に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
特開平1−68503号公報には、内方及び外方に張り出した張出部を有するT字型の防漏壁を、吸収体の側縁よりも外方に設けた使い捨ておむつが記載されている。この使い捨ておむつは、T字型の防漏壁の上面を、着用者の大腿部へ面で当接させて、排泄物の漏れを防止しようとするものである。
【0003】
しかし、前記T字型の防漏壁における内方への張出部は、その先端部が、吸収体の側縁よりも外方に位置しているので、高装着圧下において前記防漏壁が押し潰されてしまった場合には、吸収体の側縁から外方の位置には、もはや液を吸収する部材が何も存在しなくなり、横方向への液漏れが起こり易くなる。
【0004】
従って、本発明は、フィット性が高く、液漏れが防止された吸収性物品を提供することを目的とする。
また、本発明は、装着圧によって防漏壁が押し潰れた場合にも液漏れが防止された吸収性物品を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明は、液透過性の表面層と、液不透過性の裏面層と、両層間に介在する液保持性の吸収層と、該吸収層の左右両側縁それぞれの近傍から起立した防漏壁とを具備し、該吸収層の表面層側に所定形状の防漏溝が形成された吸収性物品において、
前記防漏壁が、基壁部と、該基壁部の上方部から前記吸収性物品の内方及び外方それぞれへ張り出す内方張出部及び外方張出部とを有し、
前記内方張出部及び前記外方張出部それぞれの先端部に、その長さ方向に沿って弾性部材を配すると共に、前記内方張出部を、前記吸収層の上方であって且つ前記防漏溝よりも外方に位置させた吸収性物品を提供することにより前記目的を達成したものである。
【0006】
【発明の実施の形態】
以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。図1には、本発明の吸収性物品の一実施形態としての生理用ナプキンをそのトップシート側からみた平面図が示されており、図2には、図1におけるII−II線断面図が示されており、図3には、図1におけるII−II線断面斜視図が示されている。
【0007】
図1〜図3に示すように、本実施形態の生理用ナプキン1は、縦長の形状をしており、液透過性の表面層としてのトップシート2、液不透過性の裏面層としてのバックシート3、及びトップシート2とバックシート3との間に介在する液保持性の吸収層としての吸収体4を具備する。ナプキン1の左右両側部には、その長さ方向に沿って一対の防漏壁5,5が配されている。防漏壁5は、吸収体4の左右両側縁それぞれの近傍から起立している。
【0008】
ナプキン1は、その着用時に着用者の排泄部に対向する部位である排泄部対向部Aと、該排泄部対向部Aに隣接し且つナプキン1の前方及び後方にそれぞれ位置する前方部B及び後方部Cとに区分される。
【0009】
トップシート2は、吸収体4の上面の全域を被覆し且つ吸収体4の側縁から延出してバックシート側へ巻き込まれている。トップシート2は、従来の公知のものと同様の材料から構成することができ、例えば親水性の不織布や開孔フィルム等が用いられる。バックシート3は、液不透過性のフィルムシート(好ましくは水蒸気透過性で且つ液不透過性のフィルムシート)3aと液吸収性の不織布3bとの積層体から構成されている。フィルムシート3aは、ナプキンの着用時に着衣に対向するように配置されており、不織布3bは、着用者に対向するように配置されている。吸収体4は、フラッフパルプと高吸収性ポリマーの粒子との混合物がティッシュペーパーに包被されて構成されている。
【0010】
バックシート3は、吸収体4の側縁から外方に延出しておりサイドフラップ6を構成している。サイドフラップ6は、ナプキン1の排泄部対向部Aの位置において更に外方へ延出しており一対のウイング7を形成している。尚、図示していないが、バックシート3及びウイング7の着衣対向面には、ナプキン1を着衣に固定するための粘着剤の層が形成されており、該粘着剤の層は図示していない剥離紙によって保護されている。
【0011】
トップシート2及びバックシート3はそれぞれ吸収体4の前後端から延出しており、延出したトップシート2とバックシート3とが互いに接合固定されている。
【0012】
吸収体4のトップシート側には閉じた形状の防漏溝8が形成されている。防漏溝8は、ナプキン1の長さ方向に長軸を有する楕円形に近い形状を有しており且つナプキン1の排泄部対向部Aに位置する部分が内方に湾曲している。防漏溝8は、吸収体4とトップシート2とが一体的に圧密化されて形成されている。
【0013】
ナプキン1の左右両側部に配されている防漏壁5は、一枚の帯状シートをスリーブ状に且つT字型に加工して形成されており、基壁部5aと、該基壁部5aの上方部からナプキン1の内方及び外方それぞれへ張り出す内方張出部5b及び外方張出部5cとを有している。
【0014】
基壁部5aは、固定端と自由状態の先端とを有し、該固定端が吸収体4の側縁よりもやや外方の位置においてサイドフラップ6上に固定されている。先端からは前述した内方張出部5b及び外方張出部5cが、ナプキン1の内方及び外方へそれぞれ張り出している。
【0015】
内方張出部5b及び外方張出部5cはそれぞれ上面が同一平面上に位置するようにほぼ水平方向に張り出している。両張出部5b,5cの張り出しは、ナプキン1の長さ方向全域に亘っている。また両張出部5b,5cの張り出し幅はほぼ同一となっている。
【0016】
両張出部5b,5cそれぞれの先端部には、その長さ方向に沿って弾性部材9,9が配されている。弾性部材9の構成材料としては、通常吸収性物品に用いられるものであれば特に制限されないが、ポリオレフィン類及びポリウレタン類の発泡体並びに天然ゴムが特に好ましく用いられる。弾性部材9の形状は糸状、帯状、フィルム状等の形状とすることができる。本実施形態においては、扁平な狭幅の帯状の弾性部材を用いている。弾性部材9は、少なくともナプキン1の排泄部対向部Aに配されている。両弾性部材9は、防漏壁5を形成するシート内に伸張状態で固定されている。この固定手段としては、ヒートシールやホットメルト接着剤などが用いられる。両弾性部材9の伸張率はほぼ同様となっている。ナプキン1の自然状態においては弾性部材9が収縮することで、防漏壁5が確実に起立する。このような構成の防漏壁5によれば、図4に示す本実施形態のナプキン1の装着状態から明らかなように、両張出部5b,5cの上面が着用者の大腿部に弾性的に且つ面で密着するという面シール効果が発現するので、着用者の動作に起因する位置ずれなどの影響を受けにくくなり、液漏れが効果的に防止される。両張出部5b,5cそれぞれに弾性部材9を配することで、着用者の動作に起因して防漏壁5が内方へ押し倒され易くなる状況においても、外方張出部5cに配された弾性部材9の張力によって防漏壁5を外方へ傾斜させる力が働き、防漏壁5が内方へ押し倒されることが効果的に防止され、両張出部5b,5cの大腿部への密着度が高く維持される。更に、弾性部材9を両張出部5b,5cそれぞれの先端部に配することで、両張出部5b,5cの水平方向への張り出しが一層安定して、前述の面シール効果がより向上する。
【0017】
防漏壁5は、排泄部対向部Aの位置においてのみ起立しており、且つ前方部B及び後方部Cの位置において少なくとも内方張出部5がトップシート2に固定されることで起立が阻害されている(起立していない)。これによって、排泄部対向部Aの位置においてナプキン1のバックシート側が凸状に湾曲してナプキン全体が着用者の体型に沿った形状となる。その結果、両張出部5b,5cの上面が一層安定的に着用者の大腿部に密着し、面シール効果が一層発現するようになる。特に、本実施形態のように、防漏壁5が起立した位置の外方にウイング7が設けられていると、ナプキン1の装着状態において、ウイング7の折り返しに起因して、防漏壁5を外方へ傾斜させる力が一層大きく働き、防漏壁5が内方へ押し倒され難くなるばかりでなく、ナプキン1の肌対向面側における液の受容領域も広くなる。
【0018】
内方張出部5bは、少なくともナプキン1の排泄部対向部Aにおいて、吸収体4の上方に位置している。これによって、吸収体4の側部において、着用者の排泄部から肌を伝って横方向に流れた血液が、内方張出部5bと基壁部5aとによって形成されるポケット部10(図4参照)に堰き止められると共に、内方張出部5bの下方に位置する吸収体4によって素早く吸収され、より一層横漏れ防止効果が高くなる。即ち、吸収体4による液の吸収効果との相乗作用によって一層の防漏効果が発現する。
【0019】
内方張出部5bは、少なくともナプキン1の排泄部対向部Aにおいて、防漏溝8よりも外方に位置している。これによって、図4に示すように、ナプキン1の装着状態において、ナプキン1の長さ方向に沿う防漏溝8が可撓軸Xとなって、該防漏溝8よりも外方に位置する吸収体4がバックシート側に折れ曲がり、該吸収体4自体の大腿部への密着性が良好となると共に、両張出部5b,5cの上面による面シール効果も一層向上する。更に、高装着圧下において防漏壁5が押し潰された場合でも、液が、防漏溝8に沿ってナプキンの長さ方向に誘導されるので、防漏壁5まで液が達しにくく、また達したとしても、その部分には吸収体4が存在しているので、液が防漏壁5を乗り越えて横方向へ漏れ出しにくくなる。一般に、防漏壁5に液が少量でも付着すると、ナプキン全体がとても汚れた印象を着用者に与え易く、少量の吸収量でナプキンを交換しがちであるという不都合があるが、本実施形態のナプキン1においては、防漏溝8による液の誘導効果によって防漏壁5まで液が達しにくいことから、そのような不都合は起こりにくい。
【0020】
前述の通り、サイドフラップ6は、バックシート3が延出して形成されている。そしてバックシート3は、前述の通り、液不透過性のフィルムシート3aと液吸収性の不織布3bとから構成されており、該不織布3bが肌対向面側に位置していることから、サイドフラップ6の肌対向面側は液吸収性となっている。表面張力が比較的低い液、例えば表面張力が30dyn/cm以下の液は、防漏壁5を構成するシートの種類によっては、該シートを透過して外方に漏れ出すおそれがあるが、サイドフラップ6の肌対向面側を液吸収性となすことで、漏れ出した液が、サイドフラップ6によって吸収され、液漏れが確実に防止される。即ち、液吸収性とは、少なくとも表面張力が30dyn/cm以下の液体を吸収可能であることを意味する。
【0021】
サイドフラップ6の肌対向面側に位置する不織布3bとしては、従来吸収性物品に使用されているレーヨン、コットン、ポリエチレン、ポリプロピレン、ポリエステルからなる繊維、ポリエチレン−ポリプロピレン、ポリエチレン−ポリエステル複合繊維、或いはこれらの繊維の混合物から得られる不織布が挙げられる。不織布の種類としては、サクション不織布、スパンボンド不織布、メルトブロー不織布、ウォーターニードリング不織布やそれら複合不織布等が挙げられる。肌触り、クッション感、液の吸収空間の十分な確保の点からサクションヒートボンド不織布が好ましく使用される。
【0022】
不織布3bの表面の親水性又は撥水性に関しては、少なくとも表面張力が30dyn/cm以下の液が吸収可能であれば特に制限はない。しかし、親水性か高すぎると逆に不織布3bを通じて液が拡散し過ぎてしまう場合があることから、不織布3bの表面は、弱親水性から疎水性であることが好ましい。特に不織布3bが親水性の表面を有する場合には、不織布3bのクレム吸水度(JIS P8141)測定において、1分後のクレム吸水高さが30mm以下のものを用いることが好ましい。一方、不織布3bが、表面張力72dyn/cmの水を吸収しない疎水性の表面を有する場合には、表面張力30dyn/cmの液が吸収可能なものであれば好ましく使用される。
【0023】
防漏壁5の高さH(図2参照)は、5〜50mm、特に10〜40mmであることが、防漏壁5の違和感がなく、また防漏壁5の防漏性が高くなる点から好ましい。内方張出部5bの先端と、外方張出部5cの先端との間の距離W(図2参照)は、6〜40mm、特に10〜30mmであることが、大腿部への密着性及び両張出部5b,5cによる面シール効果の向上の点から好ましい。
【0024】
内方張出部5bの先端と、吸収体4の側縁との間の距離D(図2参照)は、3〜30mm、特に5〜20mmであることが、内方張出部5b及び基壁部5aにより形成されたポケット部10に、経血が受け止められる受止効果、及びその経血を吸収する吸収容量の向上の点から好ましい。更に、内方張出部5bの先端と、防漏溝8の外縁との間の距離E(図2参照)は、1〜30mm、特に5〜25mmであることが、ナプキン1の装着状態や着用者の姿勢により防漏壁5が内側に押し倒されたり、着座による高装着圧によって、防漏壁5が吸収体4上に押し潰された状況下でも、高い防漏効果を維持できる点から好ましい。
【0025】
防漏壁5を構成するシートとしては、該防漏壁が肌に直接当接することから、肌触りの良好なものが好ましい。また、前述した低表面張力の液が透過することを防止する観点から疎水性のものであることが好ましい。これらの要請を満足するシートとして、疎水性繊維からなるか又は疎水化処理されたエアスルー不織布、スパンボンド不織布又はスパンボンド/メルトブロー複合不織布を用いることが好ましい。
【0026】
防漏壁5が不織布から構成される場合、該不織布は、防漏壁5の長さ方向について測定されたバルクソフトネスが0.03〜0.3N、特に0.05〜0.2Nであることが好ましい。一方、防漏壁5の幅方向(高さ方向)について測定されたバルクソフトネスが0.05〜0.5N、特に0.07〜0.3Nであることが好ましい。更に幅方向のバルクソフトネス値が、長さ方向のバルクソフトネス値と同等又はそれ以上であることが好ましい。前記不織布の長さ方向及び幅方向のバルクソフトネス値を前記範囲とし、また両バルクソフトネス値の大小関係を前述のものとすることにより、両張出部5b,5cに配された弾性部材9が、長さ方向に収縮し易くなる。また、防漏壁5の両張出部5b,5cによる面シール効果、及び防漏壁5の起立性が、着用者の動作にかかわらず安定的に維持される。幅方向のバルクソフトネス値を長さ方向のバルクソフトネス値よりも高くする為には、例えば不織布の幅方向に波状のエンボス等を施す方法が好ましく挙げられる。
【0027】
前記バルクソフトネスは、以下の方法で測定される。即ち、テンシロン(東洋ボールドウィン製、型式:RTM−25)を用い、不織布サンプルを120mm×10mmにカットし、10mmの高さの円筒を作り、その上端と下端をステープルで止め、測定用の円筒サンプルを作る。この円筒サンプルの高さ方向に圧縮速度10mm/minで圧縮した時の最大荷重を測定し、その値をバルクソフトネス値とする。長さ方向のバルクソフトネス値とは、不織布の長さ方向が圧縮方向となる場合の値をいい、幅方向のバルクソフトネス値とは、不織布の幅方向が圧縮方向となる場合の値をいう。
【0028】
防漏壁5における内方張出部5b及び外方張出部5cの形状は、前述のものに限られない。例えば、両張出部5b,5cは何れも基壁部5aの先端から張り出していることを要せず、図5(a)に示すように、基壁部5cの上方部である、その先端よりもやや下方の位置から内方張出部5bを張り出させ、また外方張出部5cは先端から張り出させてもよい。この場合には、基壁部5cの先端の位置にも、防漏壁5の長さ方向に沿って弾性部材9を配してもよい。また図5(b)に示すように、図1〜図3に示す防漏壁5において外方張出部5cの先端部を垂下させ、垂下した部分に弾性部材9を配してもよい。更に図5(c)に示すように、図1〜図3に示す防漏壁5において内方張出部5b及び外方張出部5cそれぞれの先端部を垂下させ、垂下した各部分に弾性部材9を配してもよい。また、防漏壁5を、図5(d)に示すように形成してもよい。尚、図5(d)において符号11はホットメルト粘着剤である。
【0029】
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、防漏壁5における基壁部5aの固定部は吸収体4の側縁よりもやや外方に位置していたが、これに代えて固定部を吸収体4の側縁の位置に又は側縁よりもやや内方に位置させてもよい。
【0030】
また、防漏溝8は閉じた形状であることを要せず、例えば、吸収体4の側縁から内方の位置において、ナプキン1の長さ方向に沿って連続又は不連続に形成されていてもよい。
【0031】
また、内方張出部5b及び外方張出部5cそれぞれの張り出し幅は、ナプキン1の具体的用途等に応じて同一としてもよく、或いは異ならせてもよい。
【0032】
また、前記実施形態においては両張出部5b,5cの先端部それぞれに弾性部材9を配したが、これに代えて、両張出部又は何れか一方の張出部の幅方向中央部付近又は全体に亘り弾性部材を配してもよい。また内方張出部5bと外方張出部5cとで、弾性部材を配する位置、その伸張率及び/又は本数が異なるようにしてもよい。
【0033】
また、前記実施形態のナプキン1はウイング付きのものであったが、用途に応じてウイングを設けなくてもよい。
【0034】
また、サイドフラップ6を構成する液吸収性の不織布3bに代えて、開孔が施されて液吸収が可能になされたフィルム(開孔フィルム)を用いても良い。
【0035】
【発明の効果】
本発明によれば、フィット性が高く、液漏れが防止された吸収性物品が提供される。
また本発明によれば、装着圧によって防漏壁が押し潰れた場合にも液漏れが防止された吸収性物品が提供される。
【図面の簡単な説明】
【図1】本発明の吸収性物品の一実施形態としての生理用ナプキンをそのトップシート側からみた平面図である。
【図2】図1におけるII−II線断面図である。
【図3】図1におけるII−II線断面斜視図である。
【図4】図1に示すナプキンの装着状態を示す模式図である。
【図5】防漏壁の他の形態を示す模式図である。
【符号の説明】
1 生理用ナプキン(吸収性物品)
2 トップシート
3 バックシート
4 吸収体
5 防漏壁
6 サイドフラップ
7 ウイング
8 防漏溝
9 弾性部材
10 ポケット部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as a sanitary napkin or an incontinence pad, and more particularly to an absorbent article having high fit and preventing liquid leakage.
[0002]
[Prior art and problems to be solved by the invention]
Japanese Patent Laid-Open No. 1-68503 describes a disposable diaper in which a T-shaped leak-proof wall having a projecting portion projecting inward and outward is provided outward from the side edge of the absorber. Yes. This disposable diaper attempts to prevent leakage of excrement by bringing the upper surface of a T-shaped leak-proof wall into contact with the thigh of the wearer.
[0003]
However, since the tip portion of the inward projecting portion of the T-shaped leak-proof wall is located outward from the side edge of the absorber, the leak-proof wall is not exposed to high mounting pressure. In the case of being crushed, there is no longer any member that absorbs liquid at a position outward from the side edge of the absorber, and liquid leakage in the lateral direction is likely to occur.
[0004]
Therefore, an object of the present invention is to provide an absorbent article having high fit and preventing liquid leakage.
Another object of the present invention is to provide an absorbent article in which liquid leakage is prevented even when the leak-proof wall is crushed by the mounting pressure.
[0005]
[Means for Solving the Problems]
The present invention relates to a liquid-permeable surface layer, a liquid-impermeable back layer, a liquid-retaining absorbent layer interposed between both layers, and a leak-proof wall that stands up from the vicinity of each of the left and right side edges of the absorbent layer In an absorbent article in which a leak-proof groove having a predetermined shape is formed on the surface layer side of the absorbent layer,
The leak-proof wall has a base wall part, and an inwardly extending part and an outwardly extending part that protrude from the upper part of the base wall part to the inside and the outside of the absorbent article, respectively.
An elastic member is disposed along the length direction at the tip of each of the inwardly extending part and the outwardly extending part, and the inwardly extending part is above the absorbent layer and The object is achieved by providing an absorbent article positioned outward from the leakage preventing groove.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a plan view of a sanitary napkin as an embodiment of the absorbent article of the present invention as seen from the top sheet side, and FIG. 2 shows a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a sectional perspective view taken along line II-II in FIG.
[0007]
As shown in FIGS. 1 to 3, the sanitary napkin 1 of the present embodiment has a vertically long shape, a top sheet 2 as a liquid-permeable surface layer, and a back as a liquid-impermeable back layer. The sheet 3 and the absorbent body 4 as a liquid retaining absorbent layer interposed between the top sheet 2 and the back sheet 3 are provided. A pair of leak-proof walls 5 and 5 are arranged on the left and right sides of the napkin 1 along the length direction thereof. The leak-proof wall 5 stands from the vicinity of the left and right side edges of the absorber 4.
[0008]
The napkin 1 includes an excretion part facing part A that is a part facing the excretion part of the wearer when worn, and a front part B and a rear part that are adjacent to the excretion part facing part A and located in front and rear of the napkin 1, respectively. It is divided into part C.
[0009]
The top sheet 2 covers the entire area of the upper surface of the absorbent body 4 and extends from the side edge of the absorbent body 4 and is wound on the back sheet side. The top sheet 2 can be made of the same material as a conventionally known one, and for example, a hydrophilic nonwoven fabric or an apertured film is used. The back sheet 3 is composed of a laminate of a liquid impermeable film sheet (preferably a water vapor permeable and liquid impermeable film sheet) 3a and a liquid absorbent non-woven fabric 3b. The film sheet 3a is disposed so as to face the clothing when the napkin is worn, and the nonwoven fabric 3b is disposed so as to face the wearer. The absorbent body 4 is constituted by a mixture of fluff pulp and superabsorbent polymer particles wrapped in a tissue paper.
[0010]
The back sheet 3 extends outward from the side edge of the absorber 4 and constitutes a side flap 6. The side flaps 6 further extend outward at the position of the excretory part facing part A of the napkin 1 to form a pair of wings 7. Although not shown, an adhesive layer for fixing the napkin 1 to the clothing is formed on the clothing facing surfaces of the back sheet 3 and the wing 7, and the adhesive layer is not shown. Protected by release paper.
[0011]
The top sheet 2 and the back sheet 3 respectively extend from the front and rear ends of the absorber 4, and the extended top sheet 2 and the back sheet 3 are bonded and fixed to each other.
[0012]
A leak-proof groove 8 having a closed shape is formed on the top sheet side of the absorber 4. The leak-proof groove 8 has a shape close to an ellipse having a long axis in the length direction of the napkin 1, and a portion of the napkin 1 located at the excretory part facing part A is curved inward. The leak-proof groove 8 is formed by integrally compacting the absorber 4 and the top sheet 2.
[0013]
The leak-proof walls 5 disposed on the left and right sides of the napkin 1 are formed by processing a single belt-like sheet into a sleeve shape and a T-shape, and include a base wall portion 5a and the base wall portion 5a. An inward projecting portion 5b and an outward projecting portion 5c projecting inward and outward of the napkin 1, respectively.
[0014]
The base wall 5 a has a fixed end and a free end, and the fixed end is fixed on the side flap 6 at a position slightly outward from the side edge of the absorber 4. From the tip, the above-described inwardly projecting portion 5b and outwardly projecting portion 5c project inward and outward of the napkin 1, respectively.
[0015]
The inwardly projecting portion 5b and the outwardly projecting portion 5c project substantially horizontally so that their upper surfaces are located on the same plane. The overhangs of both overhang portions 5 b and 5 c extend over the entire length direction of the napkin 1. Further, the projecting widths of both projecting portions 5b and 5c are substantially the same.
[0016]
Elastic members 9 and 9 are disposed along the length direction of the distal ends of the both overhang portions 5b and 5c. The constituent material of the elastic member 9 is not particularly limited as long as it is usually used for absorbent articles, but polyolefins and polyurethane foams and natural rubber are particularly preferably used. The shape of the elastic member 9 can be a thread shape, a band shape, a film shape, or the like. In this embodiment, a flat, narrow band-like elastic member is used. The elastic member 9 is disposed at least on the excretory part facing part A of the napkin 1. Both elastic members 9 are fixed in an expanded state in a sheet forming the leak-proof wall 5. As this fixing means, a heat seal or a hot melt adhesive is used. The expansion ratios of both elastic members 9 are substantially the same. In the natural state of the napkin 1, the leak-proof wall 5 stands up reliably because the elastic member 9 contracts. According to the leak-proof wall 5 having such a configuration, as is apparent from the wearing state of the napkin 1 of the present embodiment shown in FIG. 4, the upper surfaces of the two overhang portions 5b and 5c are elastic to the wearer's thigh. In addition, since the surface sealing effect of close contact with the surface is exhibited, it is difficult to be affected by misalignment caused by the wearer's movement, and liquid leakage is effectively prevented. By arranging the elastic member 9 in each of the overhanging portions 5b and 5c, even in a situation where the leak-proof wall 5 is likely to be pushed inward due to the movement of the wearer, it is arranged in the outward overhanging portion 5c. A force that inclines the leak-proof wall 5 outwardly due to the tension of the elastic member 9 is effectively prevented, and the leak-proof wall 5 is effectively prevented from being pushed inward, and the thighs of the two protruding portions 5b and 5c High adhesion to the part is maintained. Further, by arranging the elastic member 9 at the tip of each of the overhanging portions 5b and 5c, the overhanging of the overhanging portions 5b and 5c in the horizontal direction is further stabilized, and the above-described face seal effect is further improved. To do.
[0017]
The leak-proof wall 5 stands only at the position of the excretory part facing part A, and at least the inwardly projecting part 5 is fixed to the top sheet 2 at the positions of the front part B and the rear part C. Inhibited (not standing). Thereby, the back sheet side of the napkin 1 is curved in a convex shape at the position of the excretory part facing part A, and the whole napkin becomes a shape along the wearer's body shape. As a result, the upper surfaces of the overhang portions 5b and 5c are more stably brought into close contact with the wearer's thighs, and a face sealing effect is further exhibited. In particular, when the wing 7 is provided outside the position where the leakage prevention wall 5 stands up as in the present embodiment, the leakage prevention wall 5 is caused by the folding of the wing 7 when the napkin 1 is attached. As a result, the leak-proof wall 5 is not easily pushed down inward and the liquid receiving area on the skin-facing surface side of the napkin 1 is widened.
[0018]
The inward projecting portion 5b is located above the absorber 4 at least in the excretory portion facing portion A of the napkin 1. Thereby, in the side part of the absorbent body 4, blood that has flowed laterally from the wearer's excretory part through the skin is formed by the inwardly projecting part 5 b and the base wall part 5 a (see FIG. 4) and is quickly absorbed by the absorbent body 4 located below the inwardly projecting portion 5b, further enhancing the effect of preventing side leakage. That is, a further leak-proof effect is manifested by a synergistic effect with the absorption effect of the liquid by the absorber 4.
[0019]
The inward projecting portion 5 b is located outward from the leakage prevention groove 8 at least in the excretion portion facing portion A of the napkin 1. As a result, as shown in FIG. 4, when the napkin 1 is attached, the leak-proof groove 8 along the length direction of the napkin 1 becomes the flexible axis X and is located outward from the leak-proof groove 8. The absorbent body 4 is bent to the back sheet side, the adhesiveness of the absorbent body 4 itself to the thigh is improved, and the surface sealing effect by the upper surfaces of the both overhang portions 5b and 5c is further improved. Furthermore, even when the leak-proof wall 5 is crushed under high mounting pressure, the liquid is guided along the leak-proof groove 8 in the length direction of the napkin, so that it is difficult for the liquid to reach the leak-proof wall 5. Even if it reaches, the absorber 4 is present in that portion, so that it is difficult for the liquid to get over the leak-proof wall 5 and to leak in the lateral direction. In general, if even a small amount of liquid adheres to the leak-proof wall 5, it is easy to give the wearer an impression that the entire napkin is very dirty, and there is a disadvantage that the napkin tends to be replaced with a small amount of absorption. In the napkin 1, since the liquid hardly reaches the leak-proof wall 5 due to the liquid induction effect by the leak-proof groove 8, such inconvenience hardly occurs.
[0020]
As described above, the side flap 6 is formed by extending the back sheet 3. And as above-mentioned, the back sheet 3 is comprised from the liquid-impermeable film sheet 3a and the liquid-absorbing nonwoven fabric 3b, and since this nonwoven fabric 3b is located in the skin opposing surface side, it is a side flap. The skin facing surface side of 6 is liquid absorbable. A liquid having a relatively low surface tension, for example, a liquid having a surface tension of 30 dyn / cm or less, may leak through the sheet depending on the type of the sheet constituting the leak-proof wall 5. By making the skin 6 facing surface side of the flap 6 liquid absorbable, the leaked liquid is absorbed by the side flap 6, and liquid leakage is reliably prevented. That is, the liquid absorbency means that at least a liquid having a surface tension of 30 dyn / cm or less can be absorbed.
[0021]
As the nonwoven fabric 3b located on the skin facing surface side of the side flap 6, fibers made of rayon, cotton, polyethylene, polypropylene, polyester, polyethylene-polypropylene, polyethylene-polyester composite fibers, or these conventionally used for absorbent articles Nonwoven fabric obtained from a mixture of these fibers. Examples of the nonwoven fabric include a suction nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, a water needling nonwoven fabric, and a composite nonwoven fabric thereof. A suction heat bond nonwoven fabric is preferably used from the viewpoints of touch, cushion feeling, and sufficient space for absorbing liquid.
[0022]
The hydrophilicity or water repellency of the surface of the nonwoven fabric 3b is not particularly limited as long as at least a liquid having a surface tension of 30 dyn / cm or less can be absorbed. However, if the hydrophilicity is too high, the liquid may be excessively diffused through the nonwoven fabric 3b. Therefore, the surface of the nonwoven fabric 3b is preferably weakly hydrophilic to hydrophobic. In particular, when the nonwoven fabric 3b has a hydrophilic surface, it is preferable to use a nonwoven fabric 3b having a Klem water absorption height of 30 mm or less after one minute in measurement of the Klem water absorption (JIS P8141). On the other hand, when the nonwoven fabric 3b has a hydrophobic surface that does not absorb water with a surface tension of 72 dyn / cm, it is preferably used as long as it can absorb a liquid with a surface tension of 30 dyn / cm.
[0023]
The height H (see FIG. 2) of the leak-proof wall 5 is 5 to 50 mm, particularly 10 to 40 mm, so that the leak-proof wall 5 does not feel strange and the leak-proof property of the leak-proof wall 5 is increased. To preferred. The distance W (see FIG. 2) between the distal end of the inwardly projecting portion 5b and the distal end of the outwardly projecting portion 5c is 6 to 40 mm, particularly 10 to 30 mm. It is preferable from the viewpoint of improvement of the surface sealing effect by the property and the both overhang portions 5b and 5c.
[0024]
The distance D (see FIG. 2) between the tip of the inwardly projecting portion 5b and the side edge of the absorbent body 4 is 3 to 30 mm, particularly 5 to 20 mm. The pocket portion 10 formed by the wall portion 5a is preferable in terms of the effect of receiving menstrual blood and improving the absorption capacity for absorbing the menstrual blood. Furthermore, the distance E (see FIG. 2) between the tip of the inwardly projecting portion 5b and the outer edge of the leakage preventing groove 8 is 1 to 30 mm, particularly 5 to 25 mm. The leak-proof wall 5 is pushed inward depending on the posture of the wearer, or the high leak-proof effect can be maintained even under a situation where the leak-proof wall 5 is crushed on the absorber 4 by the high mounting pressure due to sitting. preferable.
[0025]
The sheet constituting the leak-proof wall 5 is preferably a sheet having a good touch because the leak-proof wall directly contacts the skin. Moreover, it is preferable that it is a hydrophobic thing from a viewpoint which prevents the liquid of the low surface tension mentioned above permeate | transmitting. As a sheet satisfying these requirements, it is preferable to use an air-through nonwoven fabric, a spunbond nonwoven fabric, or a spunbond / melt blown composite nonwoven fabric made of hydrophobic fibers or hydrophobized.
[0026]
When the leak-proof wall 5 is comprised from a nonwoven fabric, as for this nonwoven fabric, the bulk softness measured about the length direction of the leak-proof wall 5 is 0.03-0.3N, especially 0.05-0.2N. It is preferable. On the other hand, the bulk softness measured in the width direction (height direction) of the leak-proof wall 5 is preferably 0.05 to 0.5N, and particularly preferably 0.07 to 0.3N. Furthermore, it is preferable that the bulk softness value in the width direction is equal to or greater than the bulk softness value in the length direction. By setting the bulk softness values in the length direction and the width direction of the nonwoven fabric within the above ranges, and the magnitude relationship between the two bulk softness values as described above, the elastic member disposed in the both overhang portions 5b and 5c 9 easily contracts in the length direction. Moreover, the surface sealing effect by both overhang | projection parts 5b and 5c of the leak-proof wall 5 and the standing property of the leak-proof wall 5 are stably maintained irrespective of a wearer's operation | movement. In order to make the bulk softness value in the width direction higher than the bulk softness value in the length direction, for example, a method of applying wave-like embossing or the like in the width direction of the nonwoven fabric is preferable.
[0027]
The bulk softness is measured by the following method. That is, using Tensilon (manufactured by Toyo Baldwin, model: RTM-25), a nonwoven fabric sample is cut into 120 mm × 10 mm to form a cylinder with a height of 10 mm, and its upper and lower ends are fastened with staples. make. The maximum load when the cylindrical sample is compressed in the height direction at a compression speed of 10 mm / min is measured, and the value is defined as a bulk softness value. The bulk softness value in the length direction refers to the value when the length direction of the nonwoven fabric is the compression direction, and the bulk softness value in the width direction is the value when the width direction of the nonwoven fabric is the compression direction. Say.
[0028]
The shapes of the inwardly projecting portion 5b and the outwardly projecting portion 5c in the leak-proof wall 5 are not limited to those described above. For example, both the protruding portions 5b and 5c do not need to protrude from the tip of the base wall portion 5a, and as shown in FIG. 5 (a), the tip of the upper portion of the base wall portion 5c. Alternatively, the inwardly projecting portion 5b may be projected from a slightly lower position, and the outwardly projecting portion 5c may be projected from the tip. In this case, the elastic member 9 may be arranged along the length direction of the leak-proof wall 5 also at the tip of the base wall portion 5c. Moreover, as shown in FIG.5 (b), in the leak-proof wall 5 shown in FIGS. 1-3, the front-end | tip part of the outward projecting part 5c may be hung down, and the elastic member 9 may be arranged in the hung part. Further, as shown in FIG. 5 (c), in the leak-proof wall 5 shown in FIGS. 1 to 3, the tip portions of the inwardly projecting portion 5b and the outwardly projecting portion 5c are suspended, and each suspended portion is elastic. The member 9 may be arranged. Further, the leak-proof wall 5 may be formed as shown in FIG. In FIG. 5D, reference numeral 11 denotes a hot melt adhesive.
[0029]
The present invention is not limited to the embodiment. For example, in the said embodiment, although the fixing | fixed part of the base wall part 5a in the leak-proof wall 5 was located in a little outward rather than the side edge of the absorber 4, it replaces with this and a fixing | fixed part of the absorber 4 is used. It may be positioned at the side edge or slightly inward from the side edge.
[0030]
Moreover, the leak-proof groove 8 does not need to be a closed shape, and is formed, for example, continuously or discontinuously along the length direction of the napkin 1 at a position inward from the side edge of the absorber 4. May be.
[0031]
In addition, the overhanging width of each of the inwardly projecting portion 5b and the outwardly projecting portion 5c may be the same or different depending on the specific application of the napkin 1 or the like.
[0032]
In the above embodiment, the elastic member 9 is disposed at the tip of each of the overhang portions 5b, 5c. Or you may arrange | position an elastic member over the whole. In addition, the position where the elastic member is disposed, the expansion ratio, and / or the number of the elastic member may be different between the inwardly projecting portion 5b and the outwardly projecting portion 5c.
[0033]
Moreover, although the napkin 1 of the said embodiment was a thing with a wing, it is not necessary to provide a wing according to a use.
[0034]
Further, instead of the liquid-absorbing non-woven fabric 3b constituting the side flap 6, a film (perforated film) that is provided with holes and capable of absorbing liquid may be used.
[0035]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the absorptive article with high fitting property and the liquid leak was prevented.
Further, according to the present invention, there is provided an absorbent article in which liquid leakage is prevented even when the leak-proof wall is crushed by the mounting pressure.
[Brief description of the drawings]
FIG. 1 is a plan view of a sanitary napkin as an embodiment of the absorbent article of the present invention as viewed from the top sheet side.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a cross-sectional perspective view taken along line II-II in FIG.
4 is a schematic view showing a state in which the napkin shown in FIG. 1 is mounted. FIG.
FIG. 5 is a schematic view showing another form of the leak-proof wall.
[Explanation of symbols]
1 Sanitary napkin (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Leak-proof wall 6 Side flap 7 Wing 8 Leak-proof groove 9 Elastic member 10 Pocket part

Claims (6)

液透過性の表面層と、液不透過性の裏面層と、両層間に介在する液保持性の吸収層と、該吸収層の左右両側縁それぞれの近傍から起立した防漏壁とを具備し、該吸収層の表面層側に所定形状の防漏溝が形成された吸収性物品において、
前記防漏壁が、基壁部と、該基壁部の上方部から前記吸収性物品の内方及び外方それぞれへ張り出す内方張出部及び外方張出部とを有し、
前記内方張出部及び前記外方張出部それぞれの先端部に、その長さ方向に沿って弾性部材を配すると共に、前記内方張出部を、前記吸収層の上方であって且つ前記防漏溝よりも外方に位置させた吸収性物品。
A liquid-permeable surface layer, a liquid-impermeable back layer, a liquid-retaining absorbent layer interposed between the two layers, and a leak-proof wall standing from the vicinity of the left and right side edges of the absorbent layer. In the absorbent article in which a leak-proof groove having a predetermined shape is formed on the surface layer side of the absorbent layer,
The leak-proof wall has a base wall part, and an inwardly extending part and an outwardly extending part that protrude from the upper part of the base wall part to the inside and the outside of the absorbent article, respectively.
An elastic member is disposed along the length direction at the tip of each of the inwardly extending part and the outwardly extending part, and the inwardly extending part is above the absorbent layer and An absorptive article positioned outside the leak-proof groove.
前記防漏壁から外方へ延出するサイドフラップを更に具備し、該サイドフラップの肌対向面側が液吸収性である請求項1記載の吸収性物品。  The absorbent article according to claim 1, further comprising a side flap extending outward from the leak-proof wall, wherein the skin facing surface side of the side flap is liquid-absorbable. 前記防漏壁が起立した位置の外方に位置する前記フラップから、外方へ延出するウイング部を具備する請求項2記載の吸収性物品。  The absorptive article according to claim 2 provided with the wing part extended outside from said flap located in the outside of the position where said leak-proof wall stood up. 前記防漏壁の高さが5〜50mm、前記内方張出部の先端と前記外方張出部の側縁との間の距離が6〜40mm、前記内方張出部の先端と前記吸収層の側縁との間の距離が3〜30mm、前記内方張出部の先端と前記防漏溝の外縁との間の距離が1〜30mmである請求項1〜3の何れかに記載の吸収性物品。  The height of the leak-proof wall is 5 to 50 mm, the distance between the tip of the inwardly projecting portion and the side edge of the outwardly projecting portion is 6 to 40 mm, the tip of the inwardly projecting portion and the above The distance between the side edge of the absorbent layer is 3 to 30 mm, and the distance between the tip of the inward projecting portion and the outer edge of the leak-proof groove is 1 to 30 mm. The absorbent article as described. 前記防漏壁が不織布から構成されており、該不織布のバルクソフトネスが、前記防漏壁の長さ方向において0.03〜0.3N、幅方向において0.05〜0.5Nであり、幅方向のバルクソフトネス値が長さ方向のバルクソフトネス値と同等又はそれ以上である請求項1〜4の何れかに記載の吸収性物品。  The leak-proof wall is composed of a nonwoven fabric, and the bulk softness of the nonwoven fabric is 0.03 to 0.3 N in the length direction of the leak-proof wall and 0.05 to 0.5 N in the width direction, The absorbent article according to any one of claims 1 to 4, wherein the bulk softness value in the width direction is equal to or greater than the bulk softness value in the length direction. 前記防漏壁が、着用時に着用者の排泄部に対向する部位において起立している請求項1〜5の何れかに記載の吸収性物品。  The absorptive article according to any one of claims 1 to 5 in which said leak-proof wall stands up in the part which counters a wearer's excretion part at the time of wear.
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