JP6207639B2 - 吸収性物品 - Google Patents
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Description
前記圧搾溝は、体液排出部対応領域を含む両側にそれぞれ長手方向に沿うように形成された左右対の中央部圧搾溝と、この中央部圧搾溝の後方部から後側に延在して配置された第1後方圧搾溝と、この第1後方圧搾溝より後側に配置された第2後方圧搾溝とを有し、
前記吸収性物品の外形線は、少なくとも吸収性物品の後端の外形線が長手方向中心線に対して左右対称の波状に形成されており、
前記第1後方圧搾溝に、前記吸収性物品の長手方向中心線の両側にそれぞれ左右対称に形成された前記圧搾溝同士又は前記圧搾溝の中心線を延長した線同士が、着用者の臀裂部前端に対応する位置で交差する圧搾溝基点が形成されるとともに、前記左右対称の波状に形成された吸収性物品の後端の外形線に、左右対で外形線変曲点が形成され、
前記圧搾溝基点と左右の前記外形線変曲点とをそれぞれ結ぶ、後側に向けて離間幅が漸次拡大する2本の直線からなる仮想線上又はその近傍に、圧搾溝を基端とする吸収性物品の横断方向の変形を生じさせ易くした前記第1後方圧搾溝による易変形部と、前記第2後方圧搾溝による易変形部とが存在し、前記仮想線に沿った吸収性物品の横断方向の変形を容易化していることを特徴とする吸収性物品が提供される。
本発明に係る生理用ナプキン1は、図1及び図2に示されるように、ポリエチ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(以下、まとめて体液という。)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間に介装された綿状パルプまたは合成パルプなどからなる吸収体4と、前記吸収体4の形状保持および拡散性向上のために、前記吸収体4を囲繞するクレープ紙又は不織布などからなる被包シート5と、前記透液性表面シート3と吸収体4との間に配設された親水性のセカンドシート6と、肌当接面側の両側部に長手方向に沿って設けられたサイド不織布7とを備え、かつ前記吸収体4の周囲においては、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、超音波シール等の接合手段によって接合され、またその両側縁部では吸収体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と前記サイド不織布7とがホットメルトなどの接着剤やヒートシール、超音波シール等の接合手段によって接合され、これら不透液性裏面シート2とサイド不織布7とによる積層シート部分によって側方に突出するウイング状フラップW、Wが形成されているとともに、これよりも臀部側に後部フラップWB、WBが形成され、着用者の臀部の広い範囲まで覆う後方に長い所謂夜用ナプキンである。
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。
本生理用ナプキン1では、前記透液性表面シート3の表面側からの圧搾により、前記透液性表面シート3から吸収体4にかけての構成部材が一体的に、前記不透液性裏面シート2側に窪む圧搾溝10が左右対称で形成されている。本生理用ナプキン1は、この圧搾溝10とナプキン後端の外形線とを連関させることにより、臀裂部にフィットする生理用ナプキン1の横断方向の変形を生じさせ易くしていることを特徴とするものである。この構成について、以下、具体的に説明する。
前記圧搾溝基点16は、図5(A)に示されるように、前記第1後方圧搾溝12の前端が長手方向中心線CL上で連続して形成される場合、左右の第1後方圧搾溝12、12同士が長手方向中心線CL上で互いに交差する点を指し、同図5(B)に示されるように、前記第1後方圧搾溝12の前端が長手方向中心線CL上で離間して形成される場合、左右に離間する第1後方圧搾溝12、12の中心線を前方に延長した線同士が長手方向中心線CL上で交差する点を指している。第1後方圧搾溝12の前端が離間する場合のナプキン幅方向の離間距離は、10mm以下、好ましくは5mm以下とするのがよい。この離間距離が10mmを超えると、変形の基点となりにくい。
上記形態例では、着用者の臀部の広い範囲まで覆う後方に長い所謂夜用ナプキンを例に挙げ説明したが、臀部の股間に近い範囲までしか覆わない所謂昼用ナプキンについても同様に適用できる。
Claims (6)
- 透液性表面シートと裏面シートとの間に吸収体が介在されるとともに、前記透液性表面シートの表面側に前記裏面シート側に窪む圧搾溝が形成された吸収性物品において、
前記圧搾溝は、体液排出部対応領域を含む両側にそれぞれ長手方向に沿うように形成された左右対の中央部圧搾溝と、この中央部圧搾溝の後方部から後側に延在して配置された第1後方圧搾溝と、この第1後方圧搾溝より後側に配置された第2後方圧搾溝とを有し、
前記吸収性物品の外形線は、少なくとも吸収性物品の後端の外形線が長手方向中心線に対して左右対称の波状に形成されており、
前記第1後方圧搾溝に、前記吸収性物品の長手方向中心線の両側にそれぞれ左右対称に形成された前記圧搾溝同士又は前記圧搾溝の中心線を延長した線同士が、着用者の臀裂部前端に対応する位置で交差する圧搾溝基点が形成されるとともに、前記左右対称の波状に形成された吸収性物品の後端の外形線に、左右対で外形線変曲点が形成され、
前記圧搾溝基点と左右の前記外形線変曲点とをそれぞれ結ぶ、後側に向けて離間幅が漸次拡大する2本の直線からなる仮想線上又はその近傍に、圧搾溝を基端とする吸収性物品の横断方向の変形を生じさせ易くした前記第1後方圧搾溝による易変形部と、前記第2後方圧搾溝による易変形部とが存在し、前記仮想線に沿った吸収性物品の横断方向の変形を容易化していることを特徴とする吸収性物品。 - 前記易変形部は、曲線からなる前記圧搾溝の前記仮想線を接線とする接点又は曲線からなる前記圧搾溝の曲率変化点によって構成されている請求項1記載の吸収性物品。
- 前記易変形部は、前記仮想線を中心としてその法線方向にそれぞれ3mmずつの幅を持つ帯状の範囲内に存在している請求項1、2いずれかに記載の吸収性物品。
- 前記易変形部は、1組又は前記仮想線に沿って離間する複数組存在している請求項1〜3いずれかに記載の吸収性物品。
- 左右の前記仮想線間の成す角度は、10〜30°である請求項1〜4いずれかに記載の吸収性物品。
- 前記圧搾溝基点において、左右の前記圧搾溝が長手方向中心線上で連結されるか離間して配置されている請求項1〜5いずれかに記載の吸収性物品。
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