JP4542288B2

JP4542288B2 - Absorbent articles

Info

Publication number: JP4542288B2
Application number: JP2001199975A
Authority: JP
Inventors: 正樹松岡; 雅也藤田
Original assignee: Daio Paper Corp
Current assignee: Daio Paper Corp
Priority date: 2001-06-29
Filing date: 2001-06-29
Publication date: 2010-09-08
Anticipated expiration: 2021-06-29
Also published as: JP2003010242A

Description

【０００１】
【発明の属する技術分野】
本発明は、経血、おりもの、尿などを吸収するための生理用ナプキン、パンティライナー、失禁パッド等の吸収性物品に係り、詳しくは身体の動きに伴う下着のズレに拘わらず、排血部位に吸収体がフィットした状態を保持し得るようにした吸収性物品に関する。
【０００２】
【従来の技術】
従来より、生理用ナプキン、パンティライナー、おりものシート、失禁パッドなどの吸収性物品Ｎとしては、例えば図１０に示されるように、ポリエチレンシートまたはポリエチレンラミネート不織布などからなる不透液性裏面シート５０と、不織布または透孔性プラスチックシートなどからなる透液性表面シート５１との間に綿状パルプなどからなる吸収体５２を介在させたものが知られている。
【０００３】
この種の吸収性物品においては、ズレ止めを図るために、例えば非使用面側（外面）に１または複数条の粘着剤層５３，５３を形成したり、さらには吸収性物品の長手方向両側部に、外方に延在するウイング状フラップＷ、Ｗを一体的に形成するとともに、このウイング状フラップＷ、Ｗの不透液性裏面シート側の面に粘着剤層５４，５４を設けるようにしたものが存在する。なお、製品状態では、これらの粘着剤層５３…、５４…には剥離紙が仮着されている。
【０００４】
この吸収性物品Ｎを下着に固定する際には、図４に示されるように、先ず非使用面側に仮着されている剥離紙を剥がした後、吸収性物品Ｎを局所にあてがい、側方に突出するウイング状フラップＷ、Ｗを下着より出し、両ウイング状フラップＷ、Ｗを折返し線ＲＬ、ＲＬで折返し、下着のクロッチ部分を巻き込むようにしながら下着の股間部外面に接着するようにする。
【０００５】
前述の固定方法によって、吸収性物品Ｎは下着に対して固定されるようになるけれども、身体の動きによって下着は前後左右方向に移動することがあるため、身体の動きに伴う下着の移動によって下着に固定された吸収性物品Ｎが移動し、吸収体５２が排血部位からずれてしまうなどの問題があった。
【０００６】
このような問題に対して、たとえば実開昭62-56025号公報（従来例１）、特公平5-73419号公報（従来例２）および特開平10-33589号公報（従来例３）では、吸収体を下部吸収体と上部吸収体とにより分割した構成を採り、下着と共に吸収体全体が位置ズレするのを防止した吸収性物品構造を提案している。
【０００７】
具体的に前記従来例１では帯状パッド本体の女性局部に当てる内側面に中央縦方向に、棒状パッドをその上端部位のみを固着して取り付けた構造の生理用パッドが提案され、前記従来例２では上面側に不織布を備え、下面側に防水紙を備える上部吸収体と、上面に不織布または吸収紙を備えるとともに、下面側に防水紙を備えるとともに、前記防水紙の下面に固定テープを配設した下部吸収体とを積層配置するとともに、前記上部吸収体と下部吸収体とを長手方向両端のみで固定した構造の生理用ナプキンが提案され、前記従来例３では吸収性物品を構成する吸収部は、上層吸収体と下層吸収体とを備え、これら各吸収体が夫々独立に形成されるとともに、実質的に非接触の状態で配設され、かつ前記下層吸収体に対して幅方向に位相変化自在に表面シートにより被覆された吸収性物品が提案されている。
【０００８】
【発明が解決しようとする課題】
しかしながら、前記従来例１に係る生理用ナプキンの場合には、前記棒状パッドの上端部のみが生理用ナプキン本体に固定された構造であるため、前記棒状パッドは実質的に他に拘束されることなく自由に移動可能である。したがって、装着時または身体の激しい運動により棒状パッドが大きく位置ズレし、却って漏れを発生させる虞がある。
【０００９】
また、前記従来例２に係る生理用ナプキンの場合には、上部吸収体が下部吸収体に対して前後端部で夫々固定されているため、上部吸収体が大きく位置ズレすることはないけれども、身体の動きに伴う力（この力は主に動きの大きい後端部側（臀部側）から伝達される。）が上部吸収体に伝達されるとともに、排血相当部位で上部吸収体が固定されていないため、上部吸収体が排血部位に対応する中間部分で位置ズレを起こし、漏れが発生し易いなどの問題がある。
【００１０】
これらに対して前記従来例３に係る生理用ナプキンの場合には、上部吸収体と下部吸収体とが同明細書で言う「表面シートによって形成された連設部」によって連結された構造となっており、上部吸収体は適度に拘束された状態となり、かつ下着の動きに伴って下部吸収体が位置ズレしたとしても、上部吸収体は排血部位から位置ズレすることなく保持され、その後、下部吸収体は前記連設部による復元力によって元の状態に戻るなどの利点を有する。しかし、かかる構造の場合には、身体のある程度の動きまでは確実にその機能を発揮し得るけれども、許容範囲を越えた身体の動きにあった場合には、下部吸収体の大きな位置ズレに伴ってやはり上部吸収体が位置ズレしてしまうなどの問題がある。
【００１１】
そこで本発明の主たる課題は、どんなに下着が動いても上部吸収体が下部吸収体の動きに追従することなく、当初の位置から位置ズレしないようにし、身体にフィットした状態を保持し得るようにした吸収性物品を提供することにある。
【００１２】
【課題を解決するための手段】
前記課題を解決するために請求項１に係る本発明として、吸収体と、表面側に配置された透液性表面シートと、裏面側に配置された不透液性裏面シートとを含み、前記吸収体は下部吸収体とこれより幅狭の上部吸収体とから構成された吸収性物品において、
前記上部吸収体は、前記下部吸収体の幅寸法に対して３０〜７０％の幅寸法であり、全長に亘って等幅とされ、吸収性物品の表面側であって、かつ長手方向中心位置に配置され、少なくとも排血部位の前方側位置から前記排血部位を含む範囲までが下部吸収体側と実質的に接合され一体を成し、前記排血部位を含む範囲までの接合部後端位置からほぼ前記下部吸収体の後がわ縁部まで延在する後方側部分が下部吸収体側と非接合とされ、実質的に移動を拘束されない自由区間部を構成していることを特徴とする吸収性物品が提供される。
【００１３】
請求項２に係る本発明として、透液性表面シートと不透液性裏面シートとの間に下部吸収体が介在された吸収性物品の表面側長手方向中心位置に、上面側が透液性シートによって覆われるとともに、下面側が透液性シートまたは不透液性シートに覆われ、かつ前記下部吸収体の幅寸法に対して３０〜７０％の幅寸法であり、全長に亘って等幅とされる幅狭の上部吸収体を配置し、この上部吸収体は少なくとも排血部位の前方側位置から前記排血部位を含む範囲までが下部吸収体側と実質的に接合され一体を成し、前記排血部位を含む範囲までの接合部後端位置からほぼ前記下部吸収体の後がわ縁部まで延在する後方側部分が下部吸収体側と非接合とされ、実質的に移動を拘束されない自由区間部を構成していることを特徴とする吸収性物品が提供される。
【００１４】
請求項３に係る本発明として、前記上部吸収体の自由区間部において、上部吸収体の下面側を覆う透液性シートまたは不透液性シートと、前記下部吸収体の表面側を覆う透液性表面シートとの平均動摩擦係数が０．５以下である請求項２記載の吸収性物品が提供される。
【００１５】
請求項４に係る本発明として、前記上部吸収体の下部吸収体側に対する接合区間と非接合区間との略境界部において、前記吸収性物品の両側縁に切込みが形成され、下部吸収体を含む吸収性物品の後端側領域が左右方向に易変形性を示すようにしてある請求項１〜３いずれかに記載の吸収性物品が提供される。
【００１６】
請求項５に係る本発明として、前記上部吸収体の下部吸収体側に対する接合区間と非接合区間との略境界部において、前記吸収性物品の側縁部領域に伸縮性を与え、下部吸収体を含む吸収性物品の後端側領域が左右方向に易変形性を示すようにしてある請求項１〜３いずれかに記載の吸収性物品が提供される。
【００１７】
請求項６に係る本発明として、少なくとも吸収性物品の後端部領域において、前記不透液性裏面シート部分に伸縮性を与え、前記下部吸収体を含む吸収性物品の後端側領域が易変形性を示すようにしてある請求項１〜３いずれかに記載の吸収性物品が提供される。
【００１８】
請求項７に係る本発明として、前記上部吸収体の下部吸収体側に対する接合区間と非接合区間との略境界部において、前記下部吸収体に吸収性物品の長手方向に断面Ｚ状の折り込み部を設け、下部吸収体を含む吸収性物品の後端側領域が左右方向に易変形性を示すようにしてある請求項１〜３いずれかに記載の吸収性物品が提供される。
【００１９】
請求項８に係る本発明として、前記上部吸収体の下部吸収体側に対する接合区間と非接合区間との略境界部において、前記下部吸収体の両側縁部に切込みを形成してある請求項１〜６いずれかに記載の吸収性物品が提供される。
【００２０】
請求項９に係る本発明として、前記上部吸収体の下部吸収体側に対する接合区間と非接合区間との略境界部において、前記下部吸収体を前端側吸収体と後端側吸収体とに分離してある請求項１〜７いずれかに記載の吸収性物品が提供される。
【００２１】
【発明の実施の形態】
以下、本発明の実施の形態について図面を参照しながら詳述する。
図１は本発明に係る生理用ナプキン１の平面図、図２は図１のII−II線矢視図、図３は図１のIII−III線矢視図である。
【００２２】
前記生理用ナプキン１は、ポリエチレンシート、ポリプロピレンシートなどからなる不透液性裏面シート２と、経血やおりものなどを速やかに透過させる透液性表面シート３と、これら両シート２，３間に介在された綿状パルプまたは合成パルプなどからなる下部吸収体４と、この下部吸収体４の形状保持および拡散性向上のために周囲を囲繞するクレープ紙５と、前記透液性表面シート３の表面側であって、かつ生理用ナプキン１の長手方向中心位置に配置される上部吸収体９とから構成とされ、前記下部吸収体４の周囲において、その上下端縁部では、前記不透液性裏面シート２と透液性表面シート３との外縁部がホットメルトなどの接着剤やヒートシール等の接着手段によって接合され、またその両側縁部では下部吸収体４よりも側方に延出している前記不透液性裏面シート２と前記透液性表面シート３とがホットメルトなどの接着剤やヒートシール等の接着手段によって接合されている。
【００２３】
以下、さらに前記生理用ナプキン１の構造について詳述すると、
前記不透液性裏面シート２は、ポリエチレンやポリプロピレン等のオレフィン系樹脂シートなどの少なくとも遮水性を有するシート材が用いられるが、この他にポリエチレンシート等に不織布を積層したラミネート不織布や、さらには防水フィルムを介在して実質的に不透液性を確保した上で不織布シート（この場合には防水フィルムと不織布とで不透液性裏面シートを構成する。）などを用いることができる。近年はムレ防止の観点から透湿性を有するものが用いられる傾向にある。この遮水・透湿性シート材としては、ポリエチレンやポリプロピレン等のオレフィン系樹脂中に無機充填剤を溶融混練してシートを成形した後、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。
【００２４】
次いで、前記透液性表面シート３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としては、たとえば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。なお、本例のように、吸収体４を囲繞するクレープ紙５を設け、結果的に透液性表面シート３と吸収体４との間にクレープ紙５が介在するようにすれば、吸収性に優れる前記クレープ紙５によって体液を速やかに拡散させるとともに、これら経血等の逆戻りを防止するようになる。
【００２５】
前記不透液性裏面シート２と透液性表面シート３との間に介在される下部吸収体４は、たとえばフラッフ状パルプと吸水ポリマーとにより構成されている。前記吸水性ポリマーは吸収体を構成するパルプ中に例えば粒状粉として混入されている。前記パルプとしては、木材から得られる化学パルプ、溶解パルプ等のセルロース繊維や、レーヨン、アセテート等の人工セルロース繊維からなるものが挙げられ、広葉樹パルプよりは繊維長の長い針葉樹パルプの方が機能および価格の面で好適に使用される。
【００２６】
前記生理用ナプキン１の後部側においては、下部吸収体４の両側位置に長手方向方向に沿って透液性表面シート３の上面側からサイドエンボス１０，１０が付与され、下部吸収体４が位置ズレするのを防止するようになっている。
【００２７】
一方、前記不透液性裏面シート２の外面側にはナプキン長手方向に沿って１または複数条の粘着剤層１４，１４（図３参照）が設けられているとともに、生理用ナプキン１の排血部位Ｈ近傍の両側にはそれぞれ、透液性表面シート３の一部が側方に延在されるとともに、前記不透液性裏面シート２の一部が側方に延在され、これら側方に延在された透液性表面シート３部分と不透液性裏面シート２部分とをホットメルト接着剤等により接合してウイング状フラップＷ、Ｗが形成され、このウイング状フラップＷ、Ｗの不透液性裏面シート２側の面に粘着層１１，１１が設けられているとともに、後部側の両側部にもそれぞれ、前記透液性表面シート３と不透液性裏面シート２との側方延在部分により臀部側フラップＷ_B、Ｗ_Ｂが形成され、不透液性裏面シート２側の面に粘着剤層１２，１２が設けられている。
【００２８】
前記透液性表面シート３の表面側であって、かつナプキン長手方向中心位置に配置される上部吸収体９は、クレープ紙８によって囲繞された吸収体の表面側をさらに不織布または透孔性プラスチックシートなどの透液性シート６によって覆うとともに、裏面側を透液性シート７Ａまたは不透液性シート７Ｂによって覆った吸収体である。この場合、上部吸収体９に吸収された体液を下部吸収体４側に伝達するには裏面側を前記透液性シート７Ａにより覆い、上部吸収体９に十分な吸収能があるような場合には、裏面側を前記不透液性シート７Ｂにより覆うことができる。もちろん、１枚の透液性シートにより全体を包むように囲繞してもよい。
【００２９】
前記上部吸収体９の幅寸法は、下部吸収体４の幅寸法よりも幅狭とされる。具体的に前記上部吸収体９の幅寸法Ｂ_１は２〜６cm、好ましくは３〜５cmとするのが望ましく、下部吸収体の幅寸法Ｂ_２に対して３０〜７０％、好ましくは４０〜６０％であることが望ましい。前記上部吸収体９の幅寸法Ｂ_１が２cm未満の場合には装着者の体液排出部を十分に覆うことができず漏れが生じ易い。また６cmを超える場合には装着者の体液排出部に対するフィット性が確保されない。
【００３０】
前記上部吸収体９は、別体として製造された後、前記透液性表面シート３の表面側に対して固定される。この固定に際し本発明では特に、前記上部吸収体９の少なくとも排血部位Ｈの前方側位置から前記排血部位を含む範囲までが下部吸収体４側と実質的に接合され一体を成し、前記排血部位Ｈを含む範囲までの接合部後端位置Ｋからさらに後方側部分が下部吸収体４側（透液性表面シート３）と非接合とされ、実質的に移動を拘束されない自由区間部１３を構成している。
【００３１】
前記上部吸収体９の前部がわ端は、図示されるように、生理用ナプキン１の前がわ縁部と同位置するのが望ましいが、少なくとも排血部位Ｈよりも前部側位置を前部がわ端として始点として接合されておれば、生理用ナプキン１の前がわ縁部よりも内方側位置を前部がわ端としてもよい。また、上部吸収体９の後部がわ端は、図示例ではほぼ下部吸収体４の後がわ縁部に合わせるようにしてあるが、これよりも短くてもよい。
【００３２】
前述した生理用ナプキン１は、前記上部吸収体９を丁度、装着者の排血部にあてがうようにするとともに、図４に示されるように、側方に突出するウイング状フラップＷ、Ｗおよび臀部側ウイング状フラップＷ_Ｂ、Ｗ_Ｂを下着３０より出し、両ウイング状フラップＷ…、Ｗ_Ｂ…を折返し線ＲＬ、ＲＬで折返し、下着のクロッチ部分を巻き込むようにしながら下着３０の股間部外面に接着するようにして装着される。
【００３３】
生理用ナプキン１を装着した状態で装着者が運動を行うと、装着者の動作によって下着３０は大きな作用力を受け、引張変形および圧縮変形や、横ズレなどが頻繁に繰り返されるようになる。この下着の変形や移動によって下着に固定された生理用ナプキン１が左右方向の力を受けると、下部吸収体４を含む生理用ナプキン１の後端側部分（臀部側部分）が下着の移動に伴って左右方向に移動することになるが、上部吸収体９の自由区間部１３は下部吸収体４とは分離した構造とされるため、下部吸収体４の大きな移動があっても当初の位置に留まり位置ズレを起こさない。また、下部吸収体４の移動方向への力が上部吸収体９側に伝達されないため、排血部位Ｈを含む上部吸収体９の接合区間においても位置ズレを起こさず装着者の排血部にフィットした状態を保持するようになり、漏れが確実に防止されるようになる。
【００３４】
前記上部吸収体９の自由区間部１３において、上部吸収体９と下部吸収体４との相対移動を円滑にするためには、上部吸収体９の下面側を覆う透液性シートまたは不透液性シートと、前記下部吸収体の表面側を覆う透液性表面シートとの平均動摩擦係数が０．５以下であることが望ましい。平均動摩擦係数が０．５を超える場合には、下部吸収体４の移動に伴って摩擦によって左右方向の力が上部吸収体９側に伝達してしまい、上部吸収体９が位置ズレを起こすことがある。
【００３５】
他方、下着の変形や移動に伴って前記下部吸収体４を含む生理用ナプキンの後端側領域２０が容易に左右方向に変形（スイング状の変形移動）できるようにするには、例えば図５に示されるように、前記上部吸収体９の下部吸収体４側に対する接合区間と非接合区間との略境界部Ｋにおいて、生理用ナプキン１の両側縁部Ｓに切込み１５，１５を形成するとともに、下部吸収体４の両側縁部Ｓに切込み４ａ、４ａを形成するのが望ましい。
【００３６】
また、前記以外の方法としては、例えば図６に示されるように、前記上部吸収体９の下部吸収体４側に対する接合区間と非接合区間との略境界部Ｋにおいて、生理用ナプキン１の両側縁部Ｓに伸縮部１６を設けるようにするのが望ましい。前記伸縮部１６の構造としては、透液性表面シート３として、ポリウレタンなどの可逆性に塑性変形し易い弾性樹脂材料からなる長繊維で構成した不織布、または引き延ばされた際に繊維自体の繊維直径は変化しないもののジグザグ状またはスパイラル状の捲縮が形成され、この捲縮が引き延ばされることによって伸縮性を示すようにした不織布や伸縮性プラスチックシートを使用するとともに、前記不透液性裏面シート２として伸縮性プラスチックシートを使用することにより伸縮性を当該部分に与えるようにしてもよいし、波状または伸縮性を示す態様でエンボス加工を施すことにより当該部分に伸縮性を与えるようにしてもよい。なお、この場合も下部吸収体４には両側縁部Ｓに切込み４ａ、４ａを形成するのが望ましい。
【００３７】
さらに他の方法としては、図７に示されるように、前記上部吸収体９の下部吸収体４側に対する接合区間と非接合区間との略境界部Ｋにおいて、下部吸収体４に生理用ナプキン１の長手方向に断面Ｚ状の折り込み部１７を設け、下部吸収体４を含む生理用ナプキンの後端側領域２０が容易に左右方向に変形できるすることもできる。この場合には、前記折り込み部１７のゴワ付き感を解消するため、前記下部吸収体４は出来るだけ薄いシート状の吸収体を用いるのが望ましい。
【００３８】
ところで、前述の場合には、主に生理用ナプキン１の両側縁部Ｓ、Ｓ等の一部に加工を施すようにしたが、図８に示されるように、下部吸収体４を含む生理用ナプキンの後端側領域２０全域（斜線領域）に伸縮性を与えるようにしてもよい。伸縮性の付与方法としては、透液性表面シート３として、伸縮性不織布または伸縮性プラスチックシートを使用し、不透液性裏面シート２として伸縮性プラスチックシートを使用することにより行う。
【００３９】
前記下部吸収体４の後端部領域２０を容易に左右方向に変形できるようにするには、前述のように両側縁部に切込み４ａ、４ａを形成する方法以外、図９に示されるように、前記上部吸収体９の下部吸収体４側に対する接合区間と非接合区間との略境界部Ｋにおいて、下部吸収体４を前端側吸収体４Ａと後端側吸収体４Ｂとに分離することもできる。
【００４０】
【実施例】
本実施例では、上部吸収体９の下面側を覆う下面側シートと前記下部吸収体４を覆う上面側シート（透液性表面シート３）との平均動摩擦係数の好適値について試験を行った。試験は、ステンレス片（６３mm×６３mm、２００g）にフックを付けた載荷試験板に対して上部層下面に配置する資材を貼り付け固定するとともに、滑動試験台の上面側に下部層上面に配置する資材を縦250mm×横100mmにカットして貼り付け固定し、試験台に固定した資材面に対して前記荷重板の資材面を対面させた状態で載置し、フックに結んだ糸を水平方向に引っ張り、摺動時の引張力から平均動摩擦係数を算出した。なお、測定条件は、試験速度300mm/min、記録速度200mm/min、試験距離100mmとした。また、官能評価として、製品サンプルを試作し、女性１０名による装着テスト、上部吸収体と下部吸収体とを完全に接合したサンプルを基準として、フィット感、違和感の有無等により◎、○、×の３段階評価を行った。これらの結果を表１に示す。
【００４１】
【表１】

【００４２】
以上、表１の結果から、平均動摩擦係数が０．５以下である場合には、官能評価として◎の評価を得ることができることが判明するとともに、上部層下面を非開孔フィルムとし、下部層上面を開孔フィルムとしたケース（表１中、Case２の中央試験結果）において、平均動摩擦係数が最小値となり最も望ましい態様であることが判明した。
【００４３】
【発明の効果】
以上詳説のとおり本発明によれば、どんなに下着が動いても上部吸収体が下部吸収体の動きに追従することなく、当初の位置から位置ズレしないようになり、身体にフィットした状態を保持し得るようになる。その結果、体液の漏れを確実に防止できるようになる。
【図面の簡単な説明】
【図１】本発明に係る生理用ナプキン１の一部破断平面図である。
【図２】図１のII−II線矢視図である。
【図３】図１のIII−III線矢視図である。
【図４】生理用ナプキン１の装着状態図である。
【図５】下部吸収体４の後端側領域が易変形性を示すための第１態様図である。
【図６】下部吸収体４の後端側領域が易変形性を示すための第２態様図である。
【図７】下部吸収体４の後端側領域が易変形性を示すための第３態様図を示す、(A)は平面図、(B)は(A)のB-B線矢視図である。
【図８】下部吸収体４の後端側領域が易変形性を示すための第４態様図である。
【図９】下部吸収体４の後端側領域が易変形性を示すための第５態様図である。
【図１０】従来の生理用ナプキンＮの平面図である。
【符号の説明】
１…生理用ナプキン、２…不透液性裏面シート、３…透液性表面シート、４…下部吸収体、４ａ…切込み、５…クレープ紙、６…透液性シート、７Ａ…透液性シート、７Ｂ…不透液性シート、８…クレープ紙、９…上部吸収体、１０…サイドエンボス、１１・１２・１４…粘着剤層、１３…自由区間部、１５…切込み、１６…伸縮部、１７…折り込み部、４Ａ…前端側吸収体、４Ｂ…後端側吸収体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to absorbent articles such as sanitary napkins, panty liners, and incontinence pads for absorbing menstrual blood, vaginal discharge, urine, and the like, and in particular, blood discharge regardless of underwear displacement due to body movement. The present invention relates to an absorbent article that can maintain a state in which an absorbent body is fitted to a site.
[0002]
[Prior art]
Conventionally, as an absorbent article N such as a sanitary napkin, a panty liner, a cage sheet, an incontinence pad, for example, as shown in FIG. 10, a liquid-impermeable back sheet 50 made of a polyethylene sheet or a polyethylene laminated nonwoven fabric, for example. And an absorbent body 52 made of cotton-like pulp or the like is known between a non-woven fabric or a liquid-permeable surface sheet 51 made of a porous plastic sheet.
[0003]
In this type of absorbent article, in order to prevent misalignment, for example, one or a plurality of pressure-sensitive

adhesive layers

53, 53 are formed on the non-use surface side (outer surface), and further, both sides in the longitudinal direction of the absorbent article. The wing-shaped flaps W, W extending outward are integrally formed in the part, and the

adhesive layers

54, 54 are provided on the surface of the wing-shaped flaps W, W on the liquid-impervious back sheet side. There is something that was made. In the product state, a release paper is temporarily attached to these pressure-sensitive adhesive layers 53.
[0004]
When fixing this absorbent article N to the undergarment, as shown in FIG. 4, after first peeling off the release paper temporarily attached to the non-use surface side, the absorbent article N is locally applied, The wing-shaped flaps W, W protruding in the direction are taken out from the underwear, and both wing-shaped flaps W, W are folded at the fold lines RL, RL so that the crotch portion of the underwear is wound and adhered to the outer surface of the crotch portion of the underwear To do.
[0005]
Although the absorbent article N is fixed to the underwear by the fixing method described above, the underwear may move in the front / rear and left / right directions depending on the body movement. There is a problem that the absorbent article N fixed to the body moves and the absorbent body 52 is displaced from the blood discharge site.
[0006]
For example, Japanese Utility Model Publication No. 62-56025 (conventional example 1), Japanese Patent Publication No. 5-73419 (conventional example 2) and Japanese Patent Application Laid-Open No. 10-33589 (conventional example 3) address such problems. An absorbent article structure is proposed in which the absorbent body is divided into a lower absorbent body and an upper absorbent body, and the entire absorbent body is prevented from being misaligned with the underwear.
[0007]
Specifically, the conventional example 1 proposes a sanitary pad having a structure in which a bar-like pad is fixed to the inner side surface of the band-shaped pad body that is applied to a female local area in the center longitudinal direction, and only the upper end portion thereof is fixed. The upper absorbent body is provided with a nonwoven fabric on the upper surface side and the upper surface is provided with waterproof paper, the upper surface is provided with the nonwoven fabric or the absorbent paper, the waterproof paper is provided on the lower surface side, and a fixing tape is disposed on the lower surface of the waterproof paper. A sanitary napkin having a structure in which the upper absorbent body and the lower absorbent body are fixed only at both ends in the longitudinal direction is proposed, and in the conventional example 3, the absorbent portion constituting the absorbent article Comprises an upper layer absorber and a lower layer absorber, each of which is formed independently and disposed in a substantially non-contact state, and is phase-shifted with respect to the lower layer absorber in the width direction. Change Absorbent articles coated has been proposed by the topsheet.
[0008]
[Problems to be solved by the invention]
However, in the case of the sanitary napkin according to the conventional example 1, since only the upper end portion of the bar-shaped pad is fixed to the sanitary napkin body, the bar-shaped pad is substantially restrained elsewhere. It can move freely. Therefore, there is a possibility that the rod-shaped pad is greatly displaced due to intense movement of the body at the time of wearing or on the contrary, causing leakage.
[0009]
Further, in the case of the sanitary napkin according to the conventional example 2, since the upper absorbent body is fixed at the front and rear ends respectively with respect to the lower absorbent body, the upper absorbent body is not greatly displaced, The force accompanying the movement of the body (this force is transmitted mainly from the rear end side (buttock side) where movement is large) is transmitted to the upper absorbent body, and the upper absorbent body is fixed at the site corresponding to blood drainage. Therefore, there is a problem that the upper absorbent body is misaligned at the intermediate portion corresponding to the blood removal site, and leakage is likely to occur.
[0010]
On the other hand, in the case of the sanitary napkin according to the conventional example 3, the upper absorbent body and the lower absorbent body are connected by the “continuous portion formed by the surface sheet” in the same specification. The upper absorbent body is in a properly restrained state, and even if the lower absorbent body is displaced due to the movement of the underwear, the upper absorbent body is held without being displaced from the blood drainage site. The lower absorbent body has an advantage that it returns to its original state by the restoring force of the connecting portion. However, in such a structure, the function can be surely exerted up to a certain degree of body movement, but if the body movement exceeds the allowable range, it is accompanied by a large displacement of the lower absorbent body. After all, there is a problem that the upper absorber is misaligned.
[0011]
Therefore, the main problem of the present invention is that the upper absorbent body does not follow the movement of the lower absorbent body, no matter how the underwear moves, so that it does not deviate from the original position and can maintain a state fitted to the body. It is in providing the absorbent article which was made.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention according to claim 1 includes an absorbent body, a liquid-permeable surface sheet disposed on the front surface side, and a liquid-impermeable back sheet disposed on the back surface side, In the absorbent article composed of the lower absorbent body and the narrower upper absorbent body,
The upper absorbent body has a width dimension of 30 to 70% with respect to the width dimension of the lower absorbent body, is equal in width over the entire length, is on the surface side of the absorbent article, and is in the longitudinal center position. The rear end position of the joint portion from the position at the front side of the blood drainage site to the range including the blood drainage site is substantially joined to and integrated with the lower absorber side at least. Absorption characterized in that the rear side portion extending from the lower absorber to the rear edge of the lower absorber is not joined to the lower absorber side and constitutes a free section that is not substantially restrained from moving. A sex article is provided.
[0013]
As the present invention according to claim 2, the upper surface side is the liquid-permeable sheet at the center position in the longitudinal direction of the surface side of the absorbent article in which the lower absorbent body is interposed between the liquid-permeable surface sheet and the liquid-impermeable back sheet. And the lower surface is covered with a liquid-permeable sheet or liquid-impervious sheet and has a width of 30 to 70% with respect to the width of the lower absorbent body, and has a uniform width over the entire length. A narrow upper absorbent body is disposed, and this upper absorbent body is substantially joined and integrated with the lower absorbent body at least from the position on the front side of the blood drainage site to the range including the blood drainage site. A free section in which the rear side portion extending from the rear end position of the joint up to the range including the blood site to the rear edge of the lower absorber is not joined to the lower absorber side and is not substantially restrained from moving. Absorbent articles characterized in that they constitute parts It is subjected.
[0014]
As the present invention according to claim 3, in the free section of the upper absorbent body, a liquid-permeable sheet or liquid-impermeable sheet that covers the lower surface side of the upper absorbent body, and a liquid-permeable sheet that covers the surface side of the lower absorbent body The absorbent article according to claim 2, wherein an average dynamic friction coefficient with the absorbent surface sheet is 0.5 or less.
[0015]
As an aspect of the present invention according to claim 4, in the substantially boundary portion between the joining section and the non-joining section of the upper absorbent body with respect to the lower absorbent body, the absorbent article is formed with cuts on both side edges of the absorbent article and includes the lower absorbent body. The absorbent article according to any one of claims 1 to 3, wherein a rear end side region of the absorbent article is easily deformable in the left-right direction.
[0016]
As this invention which concerns on Claim 5, in the substantially boundary part of the joining area with respect to the lower absorber side of the said upper absorber, and a non-joining area, a stretchability is given to the side edge part area | region of the said absorbent article, and a lower absorber is used. The absorbent article according to any one of claims 1 to 3, wherein a rear end side region of the absorbent article is configured to be easily deformable in the left-right direction.
[0017]
As the present invention according to claim 6, at least in the rear end region of the absorbent article, the liquid-impervious back sheet portion is stretched, and the rear end region of the absorbent article including the lower absorbent body is easy. The absorbent article according to any one of claims 1 to 3, which is configured to exhibit deformability.
[0018]
As the present invention according to claim 7, at the substantially boundary portion between the joining section and the non-joining section of the upper absorbent body with respect to the lower absorbent body, the lower absorbent body is provided with a Z-shaped folded section in the longitudinal direction of the absorbent article. The absorbent article according to any one of claims 1 to 3, wherein a rear end region of the absorbent article including the lower absorbent body is configured to be easily deformable in the left-right direction.
[0019]
As the present invention according to claim 8, incisions are formed in both side edges of the lower absorbent body at a substantially boundary portion between the joined section and the non-joined section of the upper absorbent body with respect to the lower absorbent body side. 6. An absorbent article according to any one of 6 is provided.
[0020]
As a ninth aspect of the present invention, the lower absorbent body is separated into a front end side absorbent body and a rear end side absorbent body at a substantially boundary portion between a joined section and a non-joined section of the upper absorbent body with respect to the lower absorbent body side. An absorbent article according to any one of claims 1 to 7 is provided.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a plan view of a sanitary napkin 1 according to the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG.
[0022]
The sanitary napkin 1 includes a liquid-impervious back sheet 2 made of a polyethylene sheet, a polypropylene sheet, etc., a liquid-permeable front sheet 3 that allows permeation of menstrual blood, cages, and the like, and a space between the two

sheets

2 and 3. A lower absorbent body 4 made of cotton-like pulp or synthetic pulp intervening, a crepe paper 5 surrounding the lower absorbent body 4 for maintaining its shape and improving diffusibility, and the liquid-permeable surface sheet 3 The upper absorbent body 9 is disposed on the surface side of the sanitary napkin 1 in the longitudinal center position of the sanitary napkin 1. The outer edge of the liquid back sheet 2 and the liquid permeable surface sheet 3 are joined by an adhesive such as hot melt or an adhesive means such as heat seal, and the side edges of the liquid back sheet 2 and the liquid permeable surface sheet 3 are lateral to the lower absorbent body 4. Extending therefrom and said liquid-impermeable back sheet 2 and said liquid-permeable surface sheet 3 are joined by adhesive means such as adhesive or heat sealing, such as a hot melt.
[0023]
Hereinafter, the structure of the sanitary napkin 1 will be described in detail.
As the liquid-impermeable back sheet 2, a sheet material having at least water shielding properties such as an olefin resin sheet such as polyethylene or polypropylene is used. In addition, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or A nonwoven fabric sheet (in this case, the waterproof film and the nonwoven fabric constitute a liquid-impervious back sheet) can be used after substantially impervious to liquid imperviousness by interposing a waterproof film. In recent years, those having moisture permeability tend to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous material obtained by melting and kneading an inorganic filler in an olefin-based resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. It is a sheet.
[0024]
Next, as the liquid-permeable surface sheet 3, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. Examples of the material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, 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 lace method, 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. In addition, if the crepe paper 5 which surrounds the absorber 4 is provided like this example and the crepe paper 5 intervenes between the liquid-permeable surface sheet 3 and the absorber 4 as a result, an absorptivity The crepe paper 5 which is excellent in diffusing body fluids quickly prevents reversal of menstrual blood and the like.
[0025]
The lower absorbent body 4 interposed between the liquid-impervious back sheet 2 and the liquid-permeable top sheet 3 is made of, for example, fluffy pulp and a water-absorbing polymer. The water-absorbing polymer is mixed in the pulp constituting the absorber as, for example, granular powder. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. Softwood pulp having a longer fiber length than hardwood pulp functions and It is preferably used in terms of price.
[0026]
On the rear side of the sanitary napkin 1, side embosses 10, 10 are applied to both side positions of the lower absorbent body 4 from the upper surface side of the liquid-permeable surface sheet 3 along the longitudinal direction, and the lower absorbent body 4 is positioned. It is designed to prevent misalignment.
[0027]
On the other hand, one or more adhesive layers 14 and 14 (see FIG. 3) are provided on the outer surface side of the liquid-impermeable back sheet 2 along the longitudinal direction of the napkin, and the sanitary napkin 1 is discharged. On both sides in the vicinity of the blood site H, a part of the liquid-permeable top sheet 3 extends sideways, and a part of the liquid-impervious backsheet 2 extends sideways. The permeable flaps W and W are formed by joining the liquid-permeable topsheet 3 portion and the liquid-impervious backsheet 2 portion that are extended in the direction by hot melt adhesive or the like. In addition to the

adhesive layers

11 and 11 being provided on the surface of the liquid-impervious back sheet 2 side, both the liquid-permeable top sheet 3 and the liquid-impervious back sheet 2 are provided on both sides on the rear side. The laterally extending portions form the buttock side flaps W _B and W _B , Adhesive layers 12, 12 are provided on the surface of the liquid-permeable back sheet 2.
[0028]
The upper absorbent body 9 disposed on the surface side of the liquid-permeable surface sheet 3 and at the center position in the longitudinal direction of the napkin is a non-woven fabric or porous plastic on the surface side of the absorbent body surrounded by the crepe paper 8. The absorbent body is covered with a liquid-permeable sheet 6 such as a sheet and the back side is covered with a liquid-permeable sheet 7A or a liquid-impermeable sheet 7B. In this case, in order to transmit the bodily fluid absorbed by the upper absorbent body 9 to the lower absorbent body 4 side, the back side is covered with the liquid permeable sheet 7A, and the upper absorbent body 9 has sufficient absorbency. The back side can be covered with the liquid-impermeable sheet 7B. Of course, you may enclose so that the whole may be wrapped with one liquid-permeable sheet.
[0029]
The width dimension of the upper absorbent body 9 is narrower than the width dimension of the lower absorbent body 4. Specifically, the width B ₁ of the upper absorbent body 9 is 2 to 6 cm, preferably 3 to 5 cm, and is 30 to 70%, preferably 40 to 60% with respect to the width B ₂ of the lower absorbent body. % Is desirable. If the width B ₁ of the upper absorber 9 is less than 2cm is likely leakage occurs can not be sufficiently covering the fluid discharge portion of the wearer. On the other hand, if it exceeds 6 cm, the fit of the wearer to the body fluid discharge part is not ensured.
[0030]
The upper absorbent body 9 is manufactured as a separate body and then fixed to the surface side of the liquid-permeable top sheet 3. In the present invention, in particular, in the present invention, at least from the front side position of the blood drainage site H to the range including the blood drainage site is substantially joined and integrally formed with the lower absorber 4 side, A free section portion in which the rear side portion from the joint rear end position K up to the range including the blood drainage site H is not joined to the lower absorbent body 4 side (liquid permeable surface sheet 3) and is not substantially restrained from moving. 13 is constituted.
[0031]
As shown in the drawing, the front edge of the upper absorbent body 9 is preferably located at the same position as the front edge of the sanitary napkin 1, but at least the front side position relative to the blood drainage site H is preferred. As long as the front part is joined as a starting point as a wrinkle end, the front part of the sanitary napkin 1 may be set to a position on the inner side of the wrinkle edge part. In addition, the rear edge of the upper absorbent body 9 is substantially aligned with the edge of the lower absorbent body 4 in the illustrated example, but may be shorter than this.
[0032]
In the sanitary napkin 1 described above, the upper absorbent body 9 is just applied to the blood drainage part of the wearer, and as shown in FIG. 4, wing-like flaps W and W protruding from the side and the heel part side wing-shaped flaps W _B, the W _B out from the underwear 30, both wing-shaped flaps W ..., W B _... the fold line RL, folded in RL, the crotch outer surface of the undergarment 30 while allowing involve crotch portion of an undergarment It is attached so as to adhere.
[0033]
When the wearer exercises with the sanitary napkin 1 worn, the underwear 30 receives a large acting force by the wearer's movement, and tensile deformation, compression deformation, lateral displacement, and the like are frequently repeated. When the sanitary napkin 1 fixed to the underwear by the deformation or movement of the undergarment receives a force in the left-right direction, the rear end side portion (the buttock side portion) of the sanitary napkin 1 including the lower absorbent body 4 is moved to the underwear. Accordingly, the free section 13 of the upper absorbent body 9 is separated from the lower absorbent body 4, so that the original position is maintained even if the lower absorbent body 4 moves greatly. Does not cause misalignment. In addition, since the force in the moving direction of the lower absorbent body 4 is not transmitted to the upper absorbent body 9 side, even in the joining section of the upper absorbent body 9 including the blood drainage site H, the positional displacement does not occur and the blood drainage part of the wearer The fitted state is maintained, and leakage is reliably prevented.
[0034]
In order to make the relative movement between the upper absorbent body 9 and the lower absorbent body 4 smooth in the free section 13 of the upper absorbent body 9, a liquid-permeable sheet or impermeable liquid covering the lower surface side of the upper absorbent body 9. It is desirable that the average dynamic friction coefficient between the conductive sheet and the liquid-permeable surface sheet covering the surface side of the lower absorbent body is 0.5 or less. When the average dynamic friction coefficient exceeds 0.5, a force in the left-right direction is transmitted to the upper absorbent body 9 due to friction as the lower absorbent body 4 moves, and the upper absorbent body 9 is displaced. There is.
[0035]
On the other hand, in order for the rear end side region 20 of the sanitary napkin including the lower absorbent body 4 to be easily deformed in the left-right direction (swing-like deformation movement) as the undergarment is deformed or moved, for example, FIG. As shown in FIG. 5, at the substantially boundary portion K between the joining section and the non-joining section of the upper absorbent body 9 with respect to the lower absorbent body 4, cuts 15 and 15 are formed in both side edges S of the sanitary napkin 1. It is desirable to form the

cuts

4a and 4a in the side edges S of the lower absorbent body 4.
[0036]
Further, as a method other than the above, as shown in FIG. 6, for example, both sides of the sanitary napkin 1 at the substantially boundary portion K between the joining section and the non-joining section of the upper absorbent body 9 with respect to the lower absorbent body 4 side. It is desirable to provide the stretchable part 16 at the edge S. As the structure of the stretchable part 16, as the liquid-permeable surface sheet 3, a nonwoven fabric made of a long fiber made of an elastic resin material that is easily reversibly plastically deformed, such as polyurethane, or the fiber itself when stretched is used. Although the fiber diameter does not change, zigzag or spiral crimps are formed, and the crimps are stretched to use a nonwoven fabric or a stretchable plastic sheet that exhibits stretchability. A stretchable plastic sheet may be used as the back sheet 2 to give stretchability to the portion, or embossing may be applied to the portion by embossing in a manner that shows wavy or stretchability. May be. In this case as well, it is desirable to form the

cuts

4a and 4a in the side edges S of the lower absorbent body 4.
[0037]
As another method, as shown in FIG. 7, the sanitary napkin 1 is attached to the lower absorbent body 4 at a substantially boundary portion K between the joined section and the non-joined section of the upper absorbent body 9 with respect to the lower absorbent body 4 side. It is also possible to provide a folded portion 17 having a Z-shaped cross section in the longitudinal direction, and the rear end side region 20 of the sanitary napkin including the lower absorbent body 4 can be easily deformed in the left-right direction. In this case, it is desirable to use a sheet-like absorbent body as thin as possible for the lower absorbent body 4 in order to eliminate the feeling of crease in the folded portion 17.
[0038]
By the way, in the above-described case, processing is mainly performed on both side edges S, S, etc. of the sanitary napkin 1, but as shown in FIG. You may make it give elasticity to the rear-end side area | region 20 whole area (hatched area | region) of a napkin. As a method for imparting stretchability, a stretchable nonwoven fabric or a stretchable plastic sheet is used as the liquid-permeable surface sheet 3, and a stretchable plastic sheet is used as the liquid-impermeable back sheet 2.
[0039]
In order to allow the rear end region 20 of the lower absorbent body 4 to be easily deformed in the left-right direction, as shown in FIG. 9, except for the method of forming the

cuts

4a, 4a at both side edges as described above. The lower absorbent body 4 may be separated into the front end side absorbent body 4A and the rear end side absorbent body 4B at a substantially boundary portion K between the joined section and the non-joined section of the upper absorbent body 9 with respect to the lower absorbent body 4 side. it can.
[0040]
【Example】
In this example, a test was performed on a suitable value of the average dynamic friction coefficient between the lower surface side sheet covering the lower surface side of the upper absorbent body 9 and the upper surface side sheet covering the lower absorbent body 4 (liquid permeable surface sheet 3). In the test, materials placed on the lower surface of the upper layer are affixed and fixed to a loading test plate with a hook on a stainless steel piece (63 mm × 63 mm, 200 g), and the upper surface of the sliding test table is placed on the upper surface of the lower layer. Cut the material into 250mm x 100mm width and affix it, and place it with the material surface of the load plate facing the material surface fixed on the test bench, and the thread tied to the hook in the horizontal direction The average dynamic friction coefficient was calculated from the tensile force during sliding. The measurement conditions were a test speed of 300 mm / min, a recording speed of 200 mm / min, and a test distance of 100 mm. Also, as sensory evaluation, product samples were prototyped, wearing test by 10 women, samples with the upper and lower absorbers completely joined together as a reference, ◎, ○, × A three-stage evaluation was performed. These results are shown in Table 1.
[0041]
[Table 1]

[0042]
As described above, from the results of Table 1, when the average dynamic friction coefficient is 0.5 or less, it is found that the evaluation of として can be obtained as the sensory evaluation, and the lower surface of the upper layer is a non-perforated film. In the case where the upper surface is a perforated film (in Table 1, the result of the central test of Case 2), it was found that the average dynamic friction coefficient is the minimum value, which is the most desirable mode.
[0043]
【The invention's effect】
As described above in detail, according to the present invention, the upper absorbent body does not follow the movement of the lower absorbent body, no matter how the underwear moves, so that it does not shift from the initial position, and maintains a state fitted to the body. To get. As a result, leakage of body fluid can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view of a sanitary napkin 1 according to the present invention.
2 is a view taken along the line II-II in FIG.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is a view showing a state in which the sanitary napkin 1 is mounted.
FIG. 5 is a first mode diagram for the rear end side region of the lower absorbent body 4 to be easily deformable.
FIG. 6 is a second mode diagram for the rear end region of the lower absorbent body 4 to be easily deformable.
7A and 7B are diagrams showing a third mode for the rear end region of the lower absorbent body 4 to be easily deformable. FIG. 7A is a plan view, and FIG. 7B is a view taken along the line BB in FIG. .
FIG. 8 is a fourth mode diagram for the rear end region of the lower absorbent body 4 to be easily deformable.
FIG. 9 is a fifth mode diagram for the rear end region of the lower absorbent body 4 to be easily deformable.
10 is a plan view of a conventional sanitary napkin N. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sanitary napkin, 2 ... Impervious back sheet, 3 ... Impervious surface sheet, 4 ... Lower absorber, 4a ... Notch, 5 ... Crepe paper, 6 ... Pervious sheet, 7A ... Pervious Sheet, 7B ... Impervious sheet, 8 ... Crepe paper, 9 ... Upper absorbent body, 10 ... Side embossing, 11, 12, 14 ... Adhesive layer, 13 ... Free section, 15 ... Cut, 16 ... Stretching part , 17 ... Folding part, 4A ... Front end side absorber, 4B ... Rear end side absorber

Claims

An absorbent body, a liquid-permeable surface sheet disposed on the front surface side, and a liquid-impermeable back sheet disposed on the back surface side, wherein the absorbent body includes a lower absorbent body and a narrower upper absorbent body. In an absorbent article composed of
The upper absorbent body has a width dimension of 30 to 70% with respect to the width dimension of the lower absorbent body, is equal in width over the entire length, is on the surface side of the absorbent article, and is in the longitudinal center position. The rear end position of the joint portion from the position at the front side of the blood drainage site to the range including the blood drainage site is substantially joined to and integrated with the lower absorber side at least. Absorption characterized in that the rear side portion extending from the lower absorber to the rear edge of the lower absorber is not joined to the lower absorber side and constitutes a free section that is not substantially restrained from moving. Sex goods.

The upper surface side is covered with the liquid permeable sheet at the center position in the longitudinal direction of the surface of the absorbent article in which the lower absorbent body is interposed between the liquid permeable top sheet and the liquid impermeable back sheet. An upper absorbent body that is covered with a conductive sheet or liquid-impervious sheet and has a width of 30 to 70% with respect to the width of the lower absorbent body and is made uniform over the entire length is disposed. The upper absorbent body is substantially joined to and integrated with the lower absorbent body at least from the position on the front side of the blood drainage site to the range including the blood drainage site, and the joint portion extending to the range including the blood drainage site. A rear side portion extending substantially from the rear end position to the rear edge of the lower absorber is not joined to the lower absorber side, and constitutes a free section that is not substantially restricted in movement. Absorbent article.

In the free section of the upper absorbent body, the average dynamic friction coefficient between the liquid permeable sheet or liquid impervious sheet covering the lower surface side of the upper absorbent body and the liquid permeable surface sheet covering the surface side of the lower absorbent body is The absorptive article according to claim 2 which is 0.5 or less.

Cuts are formed on both side edges of the absorbent article at a substantially boundary portion between the joined section and the non-joined section of the upper absorbent body with respect to the lower absorbent body, and the rear end region of the absorbent article including the lower absorbent body is left and right. The absorbent article according to any one of claims 1 to 3, wherein the article is easily deformable in a direction.

The rear end region of the absorbent article including the lower absorbent body, which gives stretchability to the side edge region of the absorbent article at a substantially boundary portion between the joining section and the non-joining section of the upper absorbent body with respect to the lower absorbent body side. The absorptive article according to any one of claims 1 to 3 which is made to show easy deformability in the horizontal direction.

At least in the rear end region of the absorbent article, the liquid-impervious back sheet portion is stretched, and the rear end region of the absorbent article including the lower absorbent body is easily deformable. Item 4. The absorbent article according to any one of Items 1 to 3.

In the substantially boundary part between the joining section and the non-joining section with respect to the lower absorbent side of the upper absorbent body, the lower absorbent body is provided with a Z-shaped folded portion in the longitudinal direction of the absorbent article, and includes the lower absorbent body. The absorbent article according to any one of claims 1 to 3, wherein a rear end side region of the article exhibits easy deformability in the left-right direction.

The absorbent article according to any one of claims 1 to 6, wherein a cut is formed in both side edges of the lower absorbent body at a substantially boundary portion between a joined section and a non-joined section of the upper absorbent body with respect to the lower absorbent body side. .

The lower absorber is separated into a front end side absorber and a rear end side absorber at a substantially boundary portion between a joining section and a non-joining section of the upper absorbent body with respect to the lower absorber side. Absorbent article as described in 1.