JP5027364B2 - Disposable diapers - Google Patents

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JP5027364B2
JP5027364B2 JP2001284520A JP2001284520A JP5027364B2 JP 5027364 B2 JP5027364 B2 JP 5027364B2 JP 2001284520 A JP2001284520 A JP 2001284520A JP 2001284520 A JP2001284520 A JP 2001284520A JP 5027364 B2 JP5027364 B2 JP 5027364B2
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JP2003088547A (en
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祐介 川上
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Uni Charm Corp
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Uni Charm Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、***物を吸収、保持する使い捨ておむつに関する。
【０００２】
【従来の技術】
特開平６−７８９５１号公報は、縦方向に前後胴周り域およびそれら胴周り域の間に位置する股下域を有するアウターカバーと、アウターカバーの内側に位置して股下域から前後胴周り域へ向かって延びる吸液性インナーパッドとから構成され、インナーパッドの中央部がアウターカバーの股下域に固着された使い捨ておむつを開示している。
【０００３】
アウターカバーは、肌当接側に位置する透液性表面シートと、肌非当接側に位置する不透液性裏面シートと、それらシートの間に介在する吸液性コアとから形成されている。アウターカバーの後胴周り域を縦方向に延びる胴周り側部には、横方向外方へ延びるテープファスナが取り付けられている。インナーパッドは、肌当接側に位置する透液性表面シートと、肌非当接側に位置する不透液性裏面シートと、それらシートの間に介在する吸液性コアとから形成されている。このおむつを着用するには、後胴周り域の胴周り側部を前胴周り域の胴周り側部の外側に重ね合わせ、テープファスナの自由端部を前胴周り域の外面に止着し、アウターカバーの前後胴周り域を連結する。前後胴周り域が連結されたおむつには、胴周り開口とその下方に一対の脚周り開口とが形成される。
【０００４】
【発明が解決しようとする課題】
前記公報に開示のおむつでは、その着用中にアウターカバーが着用者の胴部からずれ下がると、それにともなってインナーパッドもずれ下がるので、インナーパッドが着用者の股間部から下方へ離れてしまう。このおむつでは、インナーパッドが着用者の股間部から離れると、インナーパッドが***物を吸収することができず、***物が股下域から漏れてしまう場合がある。
【０００５】
本発明の課題は、アウターカバーが着用者の胴部からずれ下がったとしても、着用者の股間部に対するインナーパッドの密着状態を維持することができ、股下域からの***物の漏れを防ぐことができる使い捨ておむつを提供することにある。
【０００６】
前記課題を解決するための本発明の前提は、縦方向に前後胴周り域およびそれら胴周り域の間に位置する股下域を有するアウターカバーと、前記アウターカバーの内側に位置して前記縦方向へ延びる吸液性インナーパッドとから構成され、前記インナーパッドが、肌当接側に位置する透液性の第１表面シートと、肌非当接側に位置する第１裏面シートと、それらシートの間に介在する吸液性第１コアとから形成された使い捨ておむつである。
【０００７】
前記前提における本発明の特徴は、前記インナーパッドが、前記アウターカバーの前記前胴周り域を横方向へ延びる胴周り端部の肌当接面側に位置して前記アウターカバーに非固着の自由前端部と、前記前胴周り域と前記股下域とに位置して前記アウターカバーに非固着の自由中間部と、前記後胴周り域に位置して前記アウターカバーに固着された固定後端部とを有し、前記インナーパッドの前記自由前端部が、前記アウターカバーの前胴周り域における端部よりも前記縦方向に突出するように延出し、前記アウターカバーの前胴周り域の外面に着脱可能に止着する止着手段が、前記インナーパッドの自由前端部に形成されることにある。
【０００８】
本発明の実施の態様の一例としては、前記アウターカバーが、肌当接側に位置する透液性の第２表面シートと、肌非当接側に位置する実質的に不透液性の第２裏面シートと、それらシートの間に介在する吸液性第２コアとから形成されている。
【０００９】
本発明の実施の態様の他の一例としては、前記アウターカバーの前後胴周り域の横寸法が、前記アウターカバーの股下域の横寸法よりも大きく、前記インナーパッドの横寸法が、前記アウターカバーの股下域の横寸法と略同一またはわずかに小さい。
【００１０】
本発明の実施の態様の他の一例としては、前記横方向へ所与寸法離間して前記縦方向へ延びる一対のスリットが、前記アウターカバーの前胴周り域の胴周り端部に形成され、前記インナーパッドの横寸法が、前記スリットの間に延びる前記胴周り端部の横寸法と略同一またはわずかに小さい。
【００１１】
本発明の実施の態様の他の一例としては、前記第１裏面シートが、実質的に不透液性であり、前記パッドの自由前端部が、前記第１裏面シートのみから形成されている。
【００１２】
【発明の実施の形態】
添付の図面を参照し、本発明にかかる使い捨ておむつの詳細を説明すると、以下のとおりである。
【００１３】
図１，２は、使い捨ておむつ１Ａの斜視図と、着用状態で示すおむつ１Ａの部分破断斜視図とであり、図３，４は、図１のＡ−Ａ線矢視断面図と、図１のＢ−Ｂ線端面図とである。図１では、横方向を矢印Ｘで示し、縦方向を矢印Ｙで示す。なお、第１表面シート２０と第１裏面シート２１との内面とは、第１コア２２に対向する面をいい、それらシート２０，２１の外面とは、コア２２に非対向の面をいう。
【００１４】
おむつ１Ａは、アウターカバー２と、アウターカバー２の内側に位置する吸液性インナーパッド３とから構成されている。
【００１５】
アウターカバー２は、互いに重なり合った状態で対向面どうしが固着された実質的に不透液性の２枚の繊維不織布４，５から形成されている。アウターカバー２は、縦方向に前胴周り域６および後胴周り域８と、それら胴周り域６，８の間に位置する股下域７とを有する。アウターカバー２は、前後胴周り域６，８の横寸法Ｌ１が股下域７の横寸法Ｌ２よりも大きく、その平面形状が実質的に砂時計型を呈する。アウターカバー２は、前後胴周り域６，８を横方向へ延びる胴周り端部９，１０と、前後胴周り域６，８を縦方向へ延びる胴周り側部１１，１２と、股下域７を縦方向へ延びる脚周り側部１３とを有する。アウターカバー２では、脚周り側部１３が横方向内方へ向かって弧を画いている。
【００１６】
前胴周り域６の胴周り端部９には、横方向へ所与寸法離間して縦方向へ延びる一対のスリット１４が形成されている。後胴周り域８の胴周り端部１０には、横方向へ延びる帯状の胴周り用弾性部材１５が伸長状態で取り付けられている。脚周り側部１３には、縦方向へ延びる複数条の脚周り用弾性部材１６が伸長状態で取り付けられている。胴周り用弾性部材１５と脚周り用弾性部材１６とは、アウターカバー３を形成する不織布４，５の間に介在し、それら不織布４，５の対向面に固着されている。
【００１７】
後胴周り域８の胴周り側部１２には、横方向外方へ延びる４つのテープファスナ１７が取り付けられている。前胴周り域６に延びる不織布５の外面には、テープファスナ１７の止着域となる矩形のターゲットテープ１８が取り付けられている。テープファスナ１７の自由端部には、メカニカルファスナのうちのフック部材１９が取り付けられている。ターゲットテープ１８は、メカニカルファスナのうちのループ部材から形成されている。
【００１８】
インナーパッド３は、肌当接側に位置する透液性の第１表面シート２０と、肌非当接側に位置する実質的に不透液性の第１裏面シート２１と、それらシート２０，２１の間に介在する吸液性第１コア２２とから形成されている。コア２２は、表面シート２０と裏面シート２１との少なくとも一方の内面に固着されている。インナーパッド３は、その平面形状が縦方向へ長い略矩形を呈し、アウターカバー３の股下域７から前後胴周り域６，８の胴周り端部９，１０へ向かって縦方向へ延びている。インナーパッド３の横寸法Ｌ３は、アウターカバー２の股下域７の横寸法Ｌ２よりもわずかに小さく、スリット１４の間に延びる胴周り端部９の横寸法Ｌ４よりもわずかに小さい。
【００１９】
インナーパッド３は、前胴周り域６の胴周り端部９の外側に位置する自由前端部３ａと、前胴周り域６と股下域７とに位置する自由中間部３ｂと、後胴周り域８の胴周り端部１０近傍に位置する固定後端部３ｃとを有する。インナーパッド３では、固定後端部３ｃがアウターカバー２の胴周り端部１０近傍に固着され、自由前端部３ａと自由中間部３ｂとがアウターカバー２に固着されておらず、アウターカバー２から遊離している。インナーパッド３では、それを形成するコア２２の両側縁２２ｂの外側近傍に縦方向へ延びる実質的に不透液性の第１防漏シート２３が取り付けられている。
【００２０】
インナーパッド３の自由前端部３ａは、コア２２の端縁２２ａから縦方向外方へ延びる裏面シート２１の端部２１ａによって形成されている。自由前端部３ａに延びる裏面シート２１の外面には、横方向へ長い矩形のフック部材２４（止着手段）が取り付けられている。
【００２１】
第１防漏シート２３は、コア２２の両側縁２２ｂの外側近傍を縦方向へ延びる固定縁部２３ａと、コア２２の上方へ起立性向を有して縦方向へ延びる自由縁部２３ｂと、横方向内方へ倒伏した固定両端部２３ｃとを有する。自由縁部２３ｂには、縦方向へ延びる伸縮性弾性部材２５が伸長状態で取り付けられている。弾性部材２５は、自由縁部２３ｂの一部に被覆されている。
【００２２】
インナーパッド３の自由前端部３ａでは、表面シート２０の端部２０ａがコア２２の端縁２２ａから縦方向外方へわずかに延び、端部２０ａからさらに縦方向外方へ裏面シート２１の端部２１ａが延びている。表面シート２０と裏面シート２１とは、重なり合う端部２０ａ，２１ａにおいてそれらシート２０，２１の内面どうしが固着されている。
【００２３】
インナーパッド３の固定後端部３ｃでは、コア２２の端縁２２ａから縦方向外方へ延びる表面シート２０の端部２０ａと裏面シート２１の端部２１ａとが重なり合い、端部２０ａ，２１ａにおいてそれらシート２０，２１の内面どうしが固着されている。防漏シート２３の固定両端部２３ｃは、表面シート２０の端部２０ａ外面に固着されている。
【００２４】
インナーパッド３の自由中間部３ｂでは、コア２２の両側縁２２ｂから横方向外方へ延びる表面シート２０の側部２０ｂと裏面シート２１の側部２１ｂとが重なり合い、側部２０ｂ，２１ｂにおいてそれらシート２０，２１の内面どうしが固着されている。防漏シート２３の固定縁部２３ａは、表面シート２０の側部２０ｂ外面に固着されている。
【００２５】
図１の状態にあるおむつ１Ａを着用するには、後胴周り域８の胴周り側部１２を前胴周り域６の胴周り側部１１の外側に重ね合わせ、フック部材１９を介してテープファスナ１７の自由端部をターゲットテープ１８に止着し、アウターカバー２の前後胴周り域６，８を連結する。次に、インナーパッド３の自由前端部３ａを胴周り端部９からアウターカバー２の外側に折り曲げ、フック部材２４を介して自由前端部３ａをターゲットテープ１８に止着する。このとき、スリット１４の間に延びる前胴周り域６の胴周り端部９は、インナーパッド３の自由前端部３ａとともにアウターカバー２の外側に折り曲げられる。着用状態にあるおむつ１Ａでは、図２に示すように、胴周り開口２６とその下方に一対の脚周り開口２７とが形成され、インナーパッド３の自由中間部３ｂがアウターカバー２の股下域７から上方へ離間している。
【００２６】
おむつ１Ａでは、ターゲットテープ１８に対するインナーパッド３の自由前端部３ａの止着位置によって、前後胴周り域６，８の胴周り端部９，１０の間に延びるインナーパッド３の縦寸法を長くしたり、短くしたりすることができる。おむつ１Ａでは、着用者の股上前後長に合わせてインナーパッド３の縦寸法を調節することができるので、アウターカバー２の縦寸法が着用者の股上前後長よりも長く、アウターカバー２の股下域７が着用者の股間部から離れていたとしても、インナーパッド３の自由中間部３ｂを着用者の股間部に密着させることができる。
【００２７】
おむつ１Ａでは、着用者の動作によってアウターカバー２が着用者の胴部からずれ下がったとしても、インナーパッド３の自由中間部３ｂがアウターカバー２から遊離しているので、自由中間部３ｂがアウターカバー２とともにずれ下がることはなく、着用者の股間部に対するインナーパッド３の自由中間部３ｂの密着状態を維持することができ、股下域７からの***物の漏れを防ぐことができる。
【００２８】
おむつ１Ａでは、インナーパッド３の自由前端部３ａが裏面シート２１から形成されているので、コア２２に吸収、保持された***物が自由前端部３ａに滲出することはなく、前胴周り域６の外側に位置する自由前端部３ａの衛生状態を維持することができる。
【００２９】
おむつ１Ａでは、前胴周り域６の胴周り端部９に縦方向へ延びるスリット１４が形成され、自由前端部３ａをターゲットテープ１８に止着したときに、スリット１４の間に延びる胴周り端部９が自由前端部３ａとともにアウターカバー２の外側に折り曲げられるので、前胴周り域６の胴周り端部９や胴周り側部１１に不規則な多数の皺が形成されることはなく、さらにインナーパッド３の自由前端部３ａがアウターカバー２を着用者の胴部から下げるように作用することもない。
【００３０】
インナーパッド３では、それが表面シート２０を内側にして縦方向へ湾曲すると、弾性部材２５が縦方向へ収縮し、防漏シート２３の自由縁部２３ｂがコア２２の上方へ起立する。インナーパッド３では、起立した防漏シート２３の自由縁部２３ｂが***物に対する障壁を形成し、自由中間部３ｂからの***物の漏れを防ぐことができる。
【００３１】
図５，６は、他の実施の形態を示す使い捨ておむつ１Ｂの斜視図と、図５のＣ−Ｃ線矢視断面図とであり、図７は、図５のＤ−Ｄ線端面図とである。図５では、横方向を矢印Ｘで示し、縦方向を矢印Ｙで示す。なお、第２表面シート２８と第２裏面シート２９との内面とは、第２コア３０に対向する面をいい、それらシート２８，２９の外面とは、コア３０に非対向の面をいう。このおむつ１Ｂが図１のそれと異なる点は、以下のとおりである。
【００３２】
アウターカバー２は、肌当接側に位置する透液性の第２表面シート２８と、肌非当接側に位置する実質的に不透液性の第２裏面シート２９と、それらシート２８，２９の間に介在する吸液性第２コア３０とから形成されている。コア３０は、表面シート２８と裏面シート２９とのうちの少なくとも一方の内面に固着されている。アウターカバー２の胴周り側部１１，１２と脚周り側部１３とには、縦方向へ延びる実質的に不透液性の第２防漏シート３１が取り付けられている。
【００３３】
後胴周り域８の胴周り側部１２には、横方向内方へ延びる４つのテープファスナ３２が取り付けられている。テープファスナ３２の自由端部の内面には、粘着剤（図示せず）が塗布され、自由端部３２が胴周り側部１２に固着された離型紙（図示せず）に粘着剤を介して仮着されている。前胴周り域６における裏面シート２９の外面には、矩形のターゲットテープ３３が取り付けられている。ターゲットテープ３３は、可撓性のプラスチックフィルムから形成されている。
【００３４】
第２防漏シート３１は、コア３０の両側縁３０ｂの外側近傍を縦方向へ延びる固定縁部３１ａと、コア３０の上方へ起立性向を有して縦方向へ延びる自由縁部３１ｂと、横方向内方へ倒伏した固定両端部３１ｃとを有する。防漏シート３１では、固定縁部３１ａから横方向外方へ側部３１ｄが延びている。自由縁部３１ｂには、縦方向へ延びる伸縮性弾性部材３４が伸長状態で取り付けられている。弾性部材３４は、自由縁部３１ｂの一部に被覆されている。
【００３５】
アウターカバー２の胴周り端部９，１０では、コア３０の端縁３０ａから縦方向外方へ延びる表面シート２８の端部２８ａと裏面シート２９の端部２９ａとが互いに重なり合い、端部２８ａ，２９ａにおいてそれらシート２８，２９の内面どうしが固着されている。防漏シート３１の固定両端部３１ｃは、表面シート２８の端部２８ａ外面に固着されている。胴周り用弾性部材１５は、表面シート２８の端部２８ａと裏面シート２９の端部２９ａとの間に介在し、それらシート２８，２９の端部２８ａ，２９ａ内面に固着されている。
【００３６】
アウターカバー２の胴周り側部１１，１２と脚周り側部１３とでは、表面シート２８の側部２８ｂがコア３０の側縁３０ｂから横方向外方へわずかに延び、側部２８ｂからさらに横方向外方へ裏面シート２９の側部２９ｂと防漏シート３１の側部３１ｄとが延びている。表面シート２８の側部２８ｂは、裏面シート２９の側部２９ｂと防漏シート３１の固定縁部３１ａとの間に介在し、それらに固着されている。胴周り側部１１，１２と脚周り側部１３とでは、裏面シート２９の側部２９ｂと防漏シート３１の側部３１ｄとが重なり合い、側部２９ｂ，３１ｄにおいてそれらシート２９，３１の内面どうしが固着されている。脚周り用弾性部材１６は、裏面シート２９の側部２９ｂと防漏シート３１の側部３１ｄとの間に介在し、それらシート２９，３１の側部２９ｂ，３１ｄ内面に固着されている。
【００３７】
インナーパッド３は、前胴周り域６の胴周り端部９の外側に位置する自由前端部３ａと、前胴周り域６と股下域７とに位置する自由中間部３ｂと、後胴周り域８の胴周り端部１０近傍に位置する固定後端部３ｃとを有する。インナーパッド３では、固定後端部３ｃがアウターカバー２の胴周り端部１０近傍に固着され、自由前端部３ａと自由中間部３ｂとがアウターカバー２に固着されていない。インナーパッド３の横寸法Ｌ３は、アウターカバー２の股下域７の横寸法Ｌ２よりもわずかに小さく、スリット１４の間に延びる胴周り端部９の横寸法Ｌ３よりもわずかに小さい。インナーパッド３の自由前端部３ａにおける裏面シート２１の外面には、粘着剤（図示せず）が塗布された横方向へ長い止着テープ３５（止着手段）が取り付けられている。止着テープ３５では、粘着剤が剥離紙３６に被覆、保護されている。
【００３８】
図５の状態にあるおむつ１Ｂを着用するには、図１のそれと同様に、後胴周り域８の胴周り側部１２を前胴周り域６の胴周り側部１１の外側に重ね合わせ、粘着剤を介してテープファスナ３２の自由端部をターゲットテープ３３に止着し、アウターカバー２の前後胴周り域６，８を連結する。次に、剥離紙３６を剥がして粘着剤を露出させ、インナーパッド３の自由前端部３ａを胴周り端部９からアウターカバー２の外側に折り曲げ、粘着剤を介して自由前端部３ａをターゲットテープ３３に止着する。このとき、スリット１４の間に延びる前胴周り域６の胴周り端部９は、インナーパッド３の自由前端部３ａとともにアウターカバー２の外側に折り曲げられる。
【００３９】
おむつ１Ｂでは、図１のそれと同様に、ターゲットテープ３３に対するインナーパッド３の自由前端部３ａの止着位置によって、着用者の股上前後長に合わせてインナーパッド３の縦寸法を調節することができ、アウターカバー２の股下域７が着用者の股間部から離れていたとしても、インナーパッド３の自由中間部３ｂを着用者の股間部に密着させることができる。おむつ１Ｂでは、インナーパッド３の自由中間部３ｂがアウターカバー２から遊離しているので、自由中間部３ｂがアウターカバー２とともにずれ下がることはなく、着用者の股間部に対するインナーパッド３の自由中間部３ｂの密着状態を維持することができ、股下域７からの***物の漏れを防ぐことができる。おむつ１Ｂでは、インナーパッド３の自由前端部３ａが裏面シート２１から形成されているので、コア２２に吸収、保持された***物が自由前端部３ａに滲出することはない。
【００４０】
おむつ１Ｂでは、アウターカバー２が吸液性コア３０を有し、インナーパッド３から漏れた***物をアウターカバー２が吸収するので、***物の漏れ防止を向上させることができる。このおむつ１Ｂでは、***物の吸収量を図１のそれよりも増加させることができるので、大人用おむつとして好適である。
【００４１】
それら図示のおむつ１Ａ，１Ｂでは、前胴周り域６の胴周り端部９にスリット１４が形成されていなくてもよい。それら図示のおむつ１Ａ，１Ｂでは、インナーパッド３の横寸法Ｌ３がアウターカバー２の股下域７の横寸法Ｌ２と略同一かつスリット１４の間に延びる胴周り端部９の横寸法Ｌ４と略同一であってもよい。それら図示のおむつ１Ａ，１Ｂでは、インナーパッド３の横方向の湾曲を容易にするために、インナーパッド３の自由中間部３ｂにおける横方向中央に縦方向へ延びる少なくとも１条のスリットまたはエンボス線が形成されていてもよい。
【００４２】
第１および第２表面シート２０，２８には、親水性繊維不織布、多数の開孔を有する疎水性繊維不織布、微細な多数の開孔を有するプラスチックフィルムのいずれかを使用することができる。図１のアウターカバー２を形成する不織布４，５には、疎水性繊維不織布を使用することができる。第１および第２裏面シート２１，２９や第１および第２防漏シート２３，３１には、疎水性繊維不織布、通気不透液性のプラスチックフィルム、疎水性繊維不織布を重ね合わせた複合不織布、疎水性繊維不織布と通気不透液性のプラスチックフィルムとを重ね合わせた複合シートのいずれかを使用することができる。第１裏面シート２１には、第１表面シート２０と同様の素材からなる透液性のシートを使用することもできる。
【００４３】
不織布４，５や第１および第２裏面シート２１，２９、第１および第２防漏シート２３，３１には、高い耐水性を有するメルトブローン法による繊維不織布を、高い強度を有しかつ柔軟性に富んだスパンボンド法による繊維不織布で挟んだ複合不織布を使用することもできる。
【００４４】
不織布としては、スパンレース、ニードルパンチ、メルトブローン、サーマルボンド、スパンポンド、ケミカルボンド、エアースルー、の各製法により製造されたものを使用することができる。不織布の構成繊維としては、ポリオレフィン系、ポリエステル系、ポリアミド系、の各繊維、ポリエチレン／ポリプロピレンまたはポリエチレン／ポリエステルからなる芯鞘型複合繊維または並列型複合繊維を使用することができる。
【００４５】
第１および第２コア２２，３０は、フラッフパルプと高吸収性ポリマー粒子との混合物、または、フラッフパルプと高吸収性ポリマー粒子と熱可塑性合成樹脂繊維との混合物であり、所要の厚みに圧縮されている。それらコア２２，３０は、それの型崩れやポリマー粒子の脱落を防止するため、全体がティッシュペーパーに被覆されていることが好ましい。ポリマー粒子としては、デンプン系、セルロース系、合成ポリマー系のものを使用することができる。
【００４６】
シート４，５，２０，２１，２３，２８，２９，３１の固着やコア２２，３０の固着、弾性部材１５，１６，２５，３４の固着には、ホットメルト型接着剤、または、ヒートシールやソニックシール等の熱による溶着手段を利用することができる。
【００４７】
この発明は、それら図示のオープン型の使い捨ておむつの他に、あらかじめ前後胴周り域の胴周り側部が固着されたパンツ型の使い捨ておむつにも実施することができる。
【００４８】
【発明の効果】
本発明にかかる使い捨ておむつによれば、ターゲットテープに対するインナーパッドの自由前端部の止着位置によって、アウターカバーの前後胴周り域の胴周り端部間に延びるインナーパッドの縦寸法を長くしたり、短くしたりすることができる。このおむつでは、着用者の股上前後長に合わせてインナーパッドの縦寸法を調節することができるので、アウターカバーの股下域が着用者の股間部から離れていたとしても、インナーパッドの自由中間部を着用者の股間部に密着させることができる。このおむつでは、着用者の動作によってアウターカバーが着用者の胴部からずれ下がったとしても、インナーパッドの自由中間部がアウターカバーから遊離しているので、自由中間部がアウターカバーとともにずれ下がることはなく、着用者の股間部に対するインナーパッドの自由中間部の密着状態を維持することができ、股下域からの***物の漏れを防ぐことができる。
【００４９】
アウターカバーが第２表面シートと第２裏面シートとの間に吸液性第２コアを有するおむつでは、インナーパッドから漏れた***物をアウターカバーが吸収するので、***物の漏れ防止を向上させることができるとともに、おむつにおける***物の吸収量を増加させることができる。
【００５０】
前胴周り域の胴周り端部に縦方向へ延びる一対のスリットが形成されたおむつでは、自由前端部をターゲットテープに止着したときに、スリットの間に延びる胴周り端部がアウターカバーの外側に折り曲げられるので、前胴周り域の胴周り端部や胴周り側部に不規則な多数の皺が形成されることはなく、さらにインナーパッドの自由前端部がアウターカバーを着用者の胴部から下げるように作用することもない。
【００５１】
インナーパッドの自由前端部が実質的に不透液性の第１裏面シートから形成されたおむつでは、吸液性第１コアに吸収、保持された***物が自由前端部に滲出することはなく、前胴周り域の外側に位置する自由前端部の衛生状態を維持することができる。
【図面の簡単な説明】
【図１】使い捨ておむつの斜視図。
【図２】着用状態で示すおむつの部分破断斜視図。
【図３】図１のＡ−Ａ線矢視断面図。
【図４】図１のＢ−Ｂ線端面図。
【図５】他の実施の形態を示す使い捨ておむつの斜視図。
【図６】図５のＣ−Ｃ線矢視断面図。
【図７】図５のＤ−Ｄ線端面図。
【符号の説明】
１Ａ，１Ｂ 開放型の使い捨ておむつ
２ アウターカバー
３ 吸液性インナーパッド
３ａ 自由前端部
３ｂ 自由中間部
３ｃ 固定後端部
６ 前胴周り域
７ 股下域
８ 後胴周り域
９ 胴周り端部
１４ スリット
２０ 第１表面シート
２１ 第１裏面シート
２２ 第１吸液性コア
２４ フック部材（止着手段）
２８ 第２表面シート
２９ 第２裏面シート
３０ 第２吸液性コア
３５ 止着テープ（止着手段）
Ｌ１ 横寸法
Ｌ２ 横寸法
Ｌ３ 横寸法
Ｌ４ 横寸法[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable diaper that absorbs and holds excrement.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 6-78951 discloses an outer cover having a front and rear waist area and a crotch area positioned between the waist areas in the vertical direction, and is located inside the outer cover from the crotch area to the front and back waist area. Disclosed is a disposable diaper that is composed of a liquid-absorbing inner pad that extends toward the inside, and the center of the inner pad is fixed to the crotch region of the outer cover.
[0003]
The outer cover is formed of a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and a liquid-absorbent core interposed between the sheets. Yes. A tape fastener that extends outward in the lateral direction is attached to a side portion of the outer periphery of the outer cover that extends in the vertical direction around the rear waist area of the outer cover. The inner pad is formed of a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and a liquid-absorbing core interposed between the sheets. Yes. To wear this diaper, the waistline side of the rear waistline area is placed outside the waistline side of the front waistline area, and the free end of the tape fastener is fastened to the outer surface of the front waistline area. Connect the front and rear waist area of the outer cover. In the diaper in which the front and rear waist area is connected, a waist opening and a pair of leg openings are formed below the waist opening.
[0004]
[Problems to be solved by the invention]
In the diaper disclosed in the above publication, when the outer cover is displaced from the wearer's torso during wearing, the inner pad is also displaced accordingly, so that the inner pad is separated downward from the wearer's crotch. In this diaper, when the inner pad is separated from the wearer's crotch, the inner pad may not be able to absorb excrement, and the excrement may leak from the crotch region.
[0005]
The problem of the present invention is that even when the outer cover is displaced from the wearer's torso, the inner pad can be kept in close contact with the wearer's crotch, and leakage of excrement from the crotch region is prevented. It is to provide a disposable diaper that can be used.
[0006]
  in frontTo solve the problemBookThe premise of the invention is an outer cover having a front and rear waist area in the vertical direction and a crotch area positioned between the waist areas, and a liquid-absorbing inner pad that is positioned inside the outer cover and extends in the vertical direction A liquid-permeable first surface sheet positioned on the skin contact side, a first back sheet positioned on the skin non-contact side, and a liquid absorbency interposed between the sheets. 1st coreAndIs a disposable diaper formed.
[0007]
  In the premiseBookA feature of the invention is that the inner pad is located on the skin contact surface side of a waistline end portion extending in the lateral direction in the front waistline region of the outer cover, and is a free front end portion that is not fixed to the outer cover, A free intermediate portion that is positioned in the front waistline region and the crotch region and is not fixed to the outer cover; and a fixed rear end portion that is positioned in the rear waistline region and is fixed to the outer cover. The free front end portion of the inner pad extends so as to protrude in the vertical direction from the end portion in the front waist area of the outer cover, and is detachably attached to the outer surface of the outer waist area of the outer cover. Fastening means for wearing is formed at the free front end of the inner pad.BeIndeedThe
[0008]
  The present inventionAs an example of the embodiment of the present invention, the outer cover has a liquid-permeable second surface sheet positioned on the skin contact side and a substantially liquid-impermeable second back surface positioned on the skin non-contact side. The sheet is formed from a sheet and a liquid-absorbing second core interposed between the sheets.
[0009]
  The present inventionAs another example of the embodiment of the present invention, the lateral dimension of the front and rear waist area of the outer cover is larger than the lateral dimension of the crotch area of the outer cover, and the lateral dimension of the inner pad is the crotch of the outer cover. It is almost the same as or slightly smaller than the horizontal dimension of the area.
[0010]
  The present inventionAs another example of the embodiment of the present invention, a pair of slits extending in the vertical direction and spaced apart by a given dimension in the lateral direction are formed at a waist circumference end of a front waist circumference region of the outer cover, and the inner The lateral dimension of the pad is substantially the same as or slightly smaller than the lateral dimension of the waist end extending between the slits.
[0011]
  The present inventionAs another example of this embodiment, the first back sheet is substantially impermeable to liquid, and the free front end portion of the pad is formed only from the first back sheet.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The details of the disposable diaper according to the present invention will be described with reference to the accompanying drawings.
[0013]
1 and 2 are a perspective view of the disposable diaper 1A and a partially broken perspective view of the diaper 1A shown in a worn state, and FIGS. 3 and 4 are a cross-sectional view taken along line AA in FIG. And BB line end view. In FIG. 1, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y. In addition, the inner surface of the 1st surface sheet 20 and the 1st back surface sheet 21 says the surface which opposes the 1st core 22, and the outer surface of these sheets 20 and 21 means the surface which does not oppose the core 22. FIG.
[0014]
The diaper 1 </ b> A includes an outer cover 2 and a liquid-absorbing inner pad 3 located inside the outer cover 2.
[0015]
The outer cover 2 is formed of two substantially liquid impervious fiber nonwoven fabrics 4 and 5 in which the opposing surfaces are fixed to each other in an overlapping state. The outer cover 2 has a front waistline region 6 and a back waistline region 8 in the vertical direction, and a crotch region 7 positioned between the waistline regions 6 and 8. The outer cover 2 has a lateral dimension L1 of the front and rear waist regions 6, 8 that is larger than a lateral dimension L2 of the crotch region 7, and its planar shape substantially exhibits an hourglass shape. The outer cover 2 includes waistline end portions 9 and 10 extending in the lateral direction through the front and rear waistline regions 6 and 8, waistline side portions 11 and 12 extending in the longitudinal direction through the front and back waistline regions 6 and 8, and a crotch region 7. And a leg periphery side portion 13 extending in the vertical direction. In the outer cover 2, the leg-surrounding side portion 13 forms an arc inward in the lateral direction.
[0016]
A pair of slits 14 extending in the vertical direction are formed in the front end portion 9 of the front waist area 6 so as to be spaced apart from each other by a given dimension in the horizontal direction. A belt-like elastic member 15 for the waistline extending in the lateral direction is attached to the waistline end portion 10 of the rear waistline region 8 in an extended state. A plurality of leg elastic members 16 extending in the vertical direction are attached to the leg-surrounding side portion 13 in an extended state. The waist elastic member 15 and the leg elastic member 16 are interposed between the nonwoven fabrics 4 and 5 forming the outer cover 3 and are fixed to the opposing surfaces of the nonwoven fabrics 4 and 5.
[0017]
Four tape fasteners 17 extending outward in the lateral direction are attached to the waistline side portion 12 of the rear waistline region 8. A rectangular target tape 18 serving as a fastening region for the tape fastener 17 is attached to the outer surface of the nonwoven fabric 5 extending to the front waistline region 6. A hook member 19 of the mechanical fastener is attached to the free end of the tape fastener 17. The target tape 18 is formed from a loop member of a mechanical fastener.
[0018]
The inner pad 3 includes a liquid-permeable first top sheet 20 located on the skin contact side, a substantially liquid-impervious first back sheet 21 located on the skin non-contact side, the sheets 20, The liquid-absorbing first core 22 is interposed between the first and second liquid-absorbing first cores 22. The core 22 is fixed to at least one inner surface of the top sheet 20 and the back sheet 21. The inner pad 3 has a substantially rectangular shape in plan view, and extends in the vertical direction from the crotch region 7 of the outer cover 3 toward the waist end portions 9 and 10 of the front and rear waist regions 6 and 8. . The lateral dimension L3 of the inner pad 3 is slightly smaller than the lateral dimension L2 of the crotch region 7 of the outer cover 2 and slightly smaller than the lateral dimension L4 of the trunk periphery end portion 9 extending between the slits 14.
[0019]
The inner pad 3 includes a free front end portion 3a located outside the waistline end portion 9 of the front waistline region 6, a free intermediate portion 3b positioned in the front waistline region 6 and the crotch region 7, and a back waistline region 8 and a fixed rear end portion 3c located in the vicinity of the trunk periphery end portion 10. In the inner pad 3, the fixed rear end portion 3 c is fixed to the vicinity of the trunk periphery end portion 10 of the outer cover 2, and the free front end portion 3 a and the free intermediate portion 3 b are not fixed to the outer cover 2. It is free. In the inner pad 3, a substantially liquid-impervious first leak-proof sheet 23 extending in the vertical direction is attached in the vicinity of the outside of both side edges 22 b of the core 22 forming the inner pad 3.
[0020]
The free front end portion 3 a of the inner pad 3 is formed by an end portion 21 a of the back sheet 21 that extends outward in the longitudinal direction from the end edge 22 a of the core 22. A rectangular hook member 24 (fastening means) that is long in the lateral direction is attached to the outer surface of the back sheet 21 that extends to the free front end 3a.
[0021]
The first leak-proof sheet 23 includes a fixed edge portion 23a extending in the vertical direction in the vicinity of the outer sides of both side edges 22b of the core 22, a free edge portion 23b extending in the vertical direction with an upright orientation above the core 22, Fixed both ends 23c lying inward in the direction. A stretchable elastic member 25 extending in the vertical direction is attached to the free edge 23b in an extended state. The elastic member 25 is covered by a part of the free edge portion 23b.
[0022]
At the free front end portion 3a of the inner pad 3, the end portion 20a of the topsheet 20 extends slightly outward in the vertical direction from the end edge 22a of the core 22, and the end portion of the back sheet 21 from the end portion 20a further outward in the vertical direction 21a extends. The top sheet 20 and the back sheet 21 have their inner surfaces fixed to each other at the overlapping end portions 20a and 21a.
[0023]
At the fixed rear end portion 3c of the inner pad 3, the end portion 20a of the topsheet 20 extending from the end edge 22a of the core 22 in the longitudinal direction outwardly and the end portion 21a of the backsheet 21 overlap with each other at the end portions 20a and 21a. The inner surfaces of the sheets 20 and 21 are fixed to each other. The fixed both end portions 23 c of the leak-proof sheet 23 are fixed to the outer surface of the end portion 20 a of the topsheet 20.
[0024]
In the free intermediate portion 3b of the inner pad 3, the side portion 20b of the topsheet 20 extending laterally outward from both side edges 22b of the core 22 and the side portion 21b of the backsheet 21 overlap each other, and these sheets are formed in the side portions 20b and 21b. The inner surfaces of 20, 21 are fixed to each other. The fixed edge portion 23 a of the leak-proof sheet 23 is fixed to the outer surface of the side portion 20 b of the topsheet 20.
[0025]
In order to wear the diaper 1 </ b> A in the state of FIG. 1, the waistline side portion 12 of the rear waistline region 8 is overlapped with the outside of the waistline side portion 11 of the front waistline region 6, and the tape is passed through the hook member 19. The free end of the fastener 17 is fastened to the target tape 18, and the front and rear waist areas 6 and 8 of the outer cover 2 are connected. Next, the free front end 3 a of the inner pad 3 is bent from the waistline end 9 to the outside of the outer cover 2, and the free front end 3 a is fixed to the target tape 18 via the hook member 24. At this time, the trunk periphery end portion 9 of the front waistline region 6 extending between the slits 14 is bent to the outside of the outer cover 2 together with the free front end portion 3 a of the inner pad 3. In the diaper 1A in the worn state, as shown in FIG. 2, a waist opening 26 and a pair of leg openings 27 are formed below the waist opening 26, and the free intermediate portion 3 b of the inner pad 3 is a crotch region 7 of the outer cover 2. It is spaced apart from the top.
[0026]
In the diaper 1 </ b> A, the vertical dimension of the inner pad 3 extending between the front and rear waist regions 6, 8 is increased by the fastening position of the free front end 3 a of the inner pad 3 with respect to the target tape 18. Or it can be shortened. In the diaper 1A, the vertical dimension of the inner pad 3 can be adjusted according to the wearer's rise and fall length, so that the vertical dimension of the outer cover 2 is longer than the wearer's rise and fall length and the inseam area of the outer cover 2 Even if 7 is away from the wearer's crotch, the free intermediate portion 3b of the inner pad 3 can be brought into close contact with the wearer's crotch.
[0027]
In the diaper 1A, even if the outer cover 2 is displaced from the wearer's torso due to the movement of the wearer, the free intermediate portion 3b of the inner pad 3 is free from the outer cover 2, so the free intermediate portion 3b is It does not slip down with the cover 2, can maintain the tight contact state of the free intermediate portion 3b of the inner pad 3 with the wearer's crotch, and can prevent excrement from leaking from the crotch region 7.
[0028]
In the diaper 1A, since the free front end 3a of the inner pad 3 is formed from the back sheet 21, the excrement absorbed and held in the core 22 does not exude to the free front end 3a. The sanitary state of the free front end portion 3a located outside can be maintained.
[0029]
In the diaper 1 </ b> A, a slit 14 extending in the vertical direction is formed at the waist end 9 of the front waist area 6, and the waist end extending between the slits 14 when the free front end 3 a is fixed to the target tape 18. Since the portion 9 is bent to the outside of the outer cover 2 together with the free front end portion 3a, a large number of irregular wrinkles are not formed on the waistline end portion 9 and the waistline side portion 11 of the front waistline region 6, Furthermore, the free front end 3a of the inner pad 3 does not act to lower the outer cover 2 from the wearer's torso.
[0030]
In the inner pad 3, when it is curved in the vertical direction with the topsheet 20 inside, the elastic member 25 contracts in the vertical direction, and the free edge 23 b of the leak-proof sheet 23 rises above the core 22. In the inner pad 3, the free edge portion 23b of the standing leak-proof sheet 23 forms a barrier against excrement, and the excrement leakage from the free intermediate portion 3b can be prevented.
[0031]
5 and 6 are a perspective view of a disposable diaper 1B showing another embodiment and a cross-sectional view taken along the line CC of FIG. 5, and FIG. 7 is an end view taken along the line DD of FIG. It is. In FIG. 5, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y. The inner surfaces of the second top sheet 28 and the second back sheet 29 are surfaces facing the second core 30, and the outer surfaces of the sheets 28 and 29 are surfaces not facing the core 30. This diaper 1B is different from that of FIG. 1 as follows.
[0032]
The outer cover 2 includes a liquid-permeable second top sheet 28 located on the skin contact side, a substantially liquid-impermeable second back sheet 29 located on the skin non-contact side, and the sheets 28, 29 is formed from a liquid-absorbing second core 30 interposed between the two. The core 30 is fixed to the inner surface of at least one of the top sheet 28 and the back sheet 29. A substantially liquid-impervious second leak-proof sheet 31 extending in the vertical direction is attached to the waist periphery side portions 11 and 12 and the leg periphery side portion 13 of the outer cover 2.
[0033]
Four tape fasteners 32 extending inward in the lateral direction are attached to the waistline side portion 12 of the rear waistline region 8. An adhesive (not shown) is applied to the inner surface of the free end portion of the tape fastener 32, and a release paper (not shown) in which the free end 32 is fixed to the waistline side portion 12 via the adhesive. Temporarily worn. A rectangular target tape 33 is attached to the outer surface of the back sheet 29 in the front waistline region 6. The target tape 33 is formed from a flexible plastic film.
[0034]
The second leak-proof sheet 31 includes a fixed edge portion 31a extending in the vertical direction in the vicinity of the outer sides of both side edges 30b of the core 30, a free edge portion 31b extending in the vertical direction with a propensity toward the upper side of the core 30, and a lateral edge. And fixed both end portions 31c lying inward in the direction. In the leak-proof sheet 31, a side portion 31d extends laterally outward from the fixed edge portion 31a. A stretchable elastic member 34 extending in the vertical direction is attached to the free edge 31b in an extended state. The elastic member 34 is covered by a part of the free edge 31b.
[0035]
In the trunk periphery end portions 9 and 10 of the outer cover 2, the end portion 28a of the topsheet 28 and the end portion 29a of the backsheet 29 extending from the end edge 30a of the core 30 to the outside in the longitudinal direction overlap each other. In 29a, the inner surfaces of the sheets 28 and 29 are fixed to each other. Both fixed end portions 31 c of the leak-proof sheet 31 are fixed to the outer surface of the end portion 28 a of the topsheet 28. The waist elastic member 15 is interposed between the end portion 28a of the top sheet 28 and the end portion 29a of the back sheet 29, and is fixed to the inner surfaces of the end portions 28a and 29a of the sheets 28 and 29.
[0036]
In the waist periphery side portions 11 and 12 and the leg periphery side portion 13 of the outer cover 2, the side portion 28b of the topsheet 28 slightly extends laterally outward from the side edge 30b of the core 30, and further laterally extends from the side portion 28b. A side portion 29b of the back sheet 29 and a side portion 31d of the leak-proof sheet 31 extend outward in the direction. The side portion 28b of the topsheet 28 is interposed between the side portion 29b of the backsheet 29 and the fixed edge portion 31a of the leak-proof sheet 31, and is fixed to them. In the trunk periphery side portions 11 and 12 and the leg periphery side portion 13, the side portion 29 b of the back sheet 29 and the side portion 31 d of the leak-proof sheet 31 overlap each other, and the inner surfaces of the sheets 29 and 31 are overlapped at the side portions 29 b and 31 d. Is fixed. The leg-around elastic member 16 is interposed between the side portion 29b of the back sheet 29 and the side portion 31d of the leak-proof sheet 31, and is fixed to the inner surfaces of the side portions 29b and 31d of the sheets 29 and 31.
[0037]
The inner pad 3 includes a free front end portion 3a located outside the waistline end portion 9 of the front waistline region 6, a free intermediate portion 3b positioned in the front waistline region 6 and the crotch region 7, and a back waistline region 8 and a fixed rear end portion 3c located in the vicinity of the trunk periphery end portion 10. In the inner pad 3, the fixed rear end portion 3 c is fixed to the vicinity of the trunk periphery end portion 10 of the outer cover 2, and the free front end portion 3 a and the free intermediate portion 3 b are not fixed to the outer cover 2. The lateral dimension L3 of the inner pad 3 is slightly smaller than the lateral dimension L2 of the crotch region 7 of the outer cover 2 and slightly smaller than the lateral dimension L3 of the trunk periphery end portion 9 extending between the slits 14. A laterally long fastening tape 35 (fastening means) coated with an adhesive (not shown) is attached to the outer surface of the back sheet 21 at the free front end 3 a of the inner pad 3. In the fastening tape 35, the adhesive is coated and protected on the release paper 36.
[0038]
In order to wear the diaper 1B in the state of FIG. 5, the waistline side portion 12 of the rear waistline region 8 is overlapped on the outside of the waistline side portion 11 of the front waistline region 6 in the same manner as that of FIG. The free end portion of the tape fastener 32 is fixed to the target tape 33 through the adhesive, and the front and rear waist regions 6 and 8 of the outer cover 2 are connected. Next, the release paper 36 is peeled off to expose the adhesive, the free front end 3a of the inner pad 3 is bent from the waistline end 9 to the outside of the outer cover 2, and the free front end 3a is attached to the target tape via the adhesive. Fasten to 33. At this time, the trunk periphery end portion 9 of the front waistline region 6 extending between the slits 14 is bent to the outside of the outer cover 2 together with the free front end portion 3 a of the inner pad 3.
[0039]
In the diaper 1B, the vertical dimension of the inner pad 3 can be adjusted according to the wearer's crotch front and back length by the fastening position of the free front end portion 3a of the inner pad 3 with respect to the target tape 33, as in FIG. Even if the crotch region 7 of the outer cover 2 is separated from the crotch portion of the wearer, the free intermediate portion 3b of the inner pad 3 can be brought into close contact with the crotch portion of the wearer. In the diaper 1B, since the free intermediate portion 3b of the inner pad 3 is separated from the outer cover 2, the free intermediate portion 3b does not slide down together with the outer cover 2, and the free intermediate portion of the inner pad 3 with respect to the wearer's crotch portion. The close contact state of the part 3b can be maintained, and excrement leakage from the crotch region 7 can be prevented. In the diaper 1B, since the free front end 3a of the inner pad 3 is formed from the back sheet 21, excrement absorbed and held in the core 22 does not ooze out to the free front end 3a.
[0040]
In the diaper 1B, since the outer cover 2 has the liquid-absorbent core 30 and the outer cover 2 absorbs excrement leaked from the inner pad 3, the prevention of excrement leakage can be improved. In this diaper 1B, since the amount of excretion absorbed can be increased more than that of FIG. 1, it is suitable as an adult diaper.
[0041]
In these illustrated diapers 1 </ b> A and 1 </ b> B, the slit 14 may not be formed at the waist end 9 of the front waist area 6. In these illustrated diapers 1 </ b> A and 1 </ b> B, the lateral dimension L <b> 3 of the inner pad 3 is substantially the same as the lateral dimension L <b> 2 of the crotch region 7 of the outer cover 2, and substantially the same as the lateral dimension L < It may be. In these illustrated diapers 1A and 1B, in order to facilitate the bending of the inner pad 3 in the lateral direction, at least one slit or emboss line extending in the vertical direction is formed at the center of the free intermediate portion 3b of the inner pad 3 in the vertical direction. It may be formed.
[0042]
For the first and second topsheets 20, 28, any of a hydrophilic fiber nonwoven fabric, a hydrophobic fiber nonwoven fabric having a large number of openings, and a plastic film having a large number of fine holes can be used. Hydrophobic fiber nonwoven fabrics can be used for the nonwoven fabrics 4 and 5 forming the outer cover 2 of FIG. The first and second back sheets 21, 29 and the first and second leak-proof sheets 23, 31 include a hydrophobic nonwoven fabric, a breathable liquid-impervious plastic film, a composite nonwoven fabric in which a hydrophobic fibrous nonwoven fabric is superimposed, Any of composite sheets in which a hydrophobic fiber nonwoven fabric and a gas-impermeable liquid-impervious plastic film are superposed can be used. As the first back sheet 21, a liquid-permeable sheet made of the same material as that of the first top sheet 20 can be used.
[0043]
The nonwoven fabrics 4, 5 and the first and second backsheets 21, 29, and the first and second leak-proof sheets 23, 31 are made of fiber nonwoven fabric by melt-blown method having high water resistance, high strength and flexibility. It is also possible to use a composite non-woven fabric sandwiched between fiber non-woven fabrics by a spun bond method rich in.
[0044]
As a nonwoven fabric, what was manufactured by each manufacturing method of a spunlace, a needle punch, a melt blown, a thermal bond, a spun pond, a chemical bond, and an air through can be used. As the constituent fibers of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polypropylene or polyethylene / polyester can be used.
[0045]
The first and second cores 22 and 30 are a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and compressed to a required thickness. Has been. The cores 22 and 30 are preferably entirely covered with a tissue paper in order to prevent their core shape and polymer particles from falling off. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.
[0046]
For fixing the sheets 4, 5, 20, 21, 23, 28, 29, 31, the cores 22, 30, and the elastic members 15, 16, 25, 34, a hot melt adhesive or heat seal It is possible to use heat welding means such as sonic seal.
[0047]
In addition to the open-type disposable diapers shown in the drawings, the present invention can also be implemented in a pants-type disposable diaper in which the waist side portions of the front and rear waist areas are fixed in advance.
[0048]
【The invention's effect】
According to the disposable diaper according to the present invention, depending on the fastening position of the free front end of the inner pad relative to the target tape, the longitudinal dimension of the inner pad extending between the front and rear waist areas of the outer cover is lengthened, It can be shortened. In this diaper, the vertical dimension of the inner pad can be adjusted according to the wearer's rise and fall length, so even if the crotch area of the outer cover is separated from the wearer's crotch, the free intermediate part of the inner pad Can be brought into close contact with the wearer's crotch. In this diaper, even if the outer cover is displaced from the wearer's torso due to the movement of the wearer, the free intermediate part of the inner pad is separated from the outer cover, so the free intermediate part is displaced together with the outer cover. No, the contact state of the free intermediate part of the inner pad with the wearer's crotch part can be maintained, and leakage of excrement from the crotch area can be prevented.
[0049]
In a diaper in which the outer cover has a liquid-absorbing second core between the second top sheet and the second back sheet, the outer cover absorbs excrement leaked from the inner pad, so that leakage prevention of excrement is improved. It is possible to increase the amount of excretion absorbed in the diaper.
[0050]
In a diaper in which a pair of slits extending in the vertical direction is formed at the waist end of the front waist area, when the free front end is fixed to the target tape, the waist end extending between the slits is the outer cover end. Because it is bent outward, there are no irregular irregular folds formed at the waistline end or the side of the waistline in the front waistline area, and the free front end of the inner pad covers the torso of the wearer. It does not act to lower the part.
[0051]
In a diaper in which the free front end portion of the inner pad is formed from the substantially liquid-impervious first back sheet, the excrement absorbed and held in the liquid absorbent first core does not ooze out to the free front end portion. The sanitary state of the free front end located outside the front waist area can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a disposable diaper.
FIG. 2 is a partially broken perspective view of a diaper shown in a worn state.
3 is a cross-sectional view taken along line AA in FIG.
4 is an end view taken along the line BB in FIG. 1. FIG.
FIG. 5 is a perspective view of a disposable diaper showing another embodiment.
6 is a cross-sectional view taken along line CC in FIG.
7 is an end view taken along the line DD of FIG.
[Explanation of symbols]
1A, 1B Open-type disposable diapers
2 Outer cover
3 Liquid absorbing inner pad
3a Free front end
3b Free intermediate part
3c Fixed rear end
6 Front waist area
7 Inseam
8 Rear waist area
9 Torso end
14 Slit
20 First surface sheet
21 First back sheet
22 First liquid absorbent core
24 Hook member (fastening means)
28 Second surface sheet
29 Second back sheet
30 Second absorbent core
35 Fastening tape (fastening means)
L1 horizontal dimension
L2 horizontal dimension
L3 horizontal dimension
L4 horizontal dimension

Claims (5)

縦方向に前後胴周り域およびそれら胴周り域の間に位置する股下域を有するアウターカバーと、前記アウターカバーの内側に位置して前記縦方向へ延びる吸液性インナーパッドとから構成され、前記インナーパッドが、肌当接側に位置する透液性の第１表面シートと、肌非当接側に位置する第１裏面シートと、それらシートの間に介在する吸液性第１コアとから形成された使い捨ておむつにおいて、
前記インナーパッドが、前記アウターカバーの前記前胴周り域を横方向へ延びる胴周り端部の肌当接面側に位置して前記アウターカバーに非固着の自由前端部と、前記前胴周り域と前記股下域とに位置して前記アウターカバーに非固着の自由中間部と、前記後胴周り域に位置して前記アウターカバーに固着された固定後端部とを有し、
前記インナーパッドの前記自由前端部が、前記アウターカバーの前胴周り域における端部よりも前記縦方向に突出するように延出し、
前記アウターカバーの前胴周り域の外面に着脱可能に止着する止着手段が、前記インナーパッドの自由前端部に形成されることを特徴とする前記おむつ。An outer cover having a front and rear waist area in the vertical direction and a crotch area located between the waist areas, and a liquid-absorbing inner pad located inside the outer cover and extending in the vertical direction, The inner pad includes a liquid-permeable first front sheet positioned on the skin contact side, a first back sheet positioned on the skin non-contact side, and a liquid-absorbing first core interposed between the sheets. In the formed disposable diaper,
The inner pad is located on the skin contact surface side of the waistline end portion extending in the lateral direction in the front waistline region of the outer cover, and the free front end portion is not fixed to the outer cover, and the front waistline region And a free intermediate portion that is positioned in the crotch region and is not fixed to the outer cover, and a fixed rear end portion that is positioned in the rear waist area and is fixed to the outer cover.
The free front end portion of the inner pad extends so as to protrude in the vertical direction from the end portion in the front waist area of the outer cover,
The diaper according to claim 1, wherein a fastening means for detachably fastening to an outer surface of a front waist area of the outer cover is formed at a free front end portion of the inner pad. 前記第１裏面シートが、実質的に不透液性であり、前記パッドの自由前端部が、前記第１裏面シートのみから形成されている請求項１に記載のおむつ。The diaper according to claim 1 , wherein the first back sheet is substantially impermeable to liquid, and a free front end portion of the pad is formed only from the first back sheet. 前記アウターカバーが、肌当接側に位置する透液性の第２表面シートと、肌非当接側に位置する実質的に不透液性の第２裏面シートと、それらシートの間に介在する吸液性第２コアとから形成されている請求項１または２に記載のおむつ。The outer cover includes a liquid-permeable second front sheet positioned on the skin contact side, a substantially liquid-impermeable second back sheet positioned on the skin non-contact side, and the sheet interposed therebetween. The diaper according to claim 1, wherein the diaper is formed from a liquid-absorbing second core. 前記アウターカバーの前後胴周り域の横寸法が、前記アウターカバーの股下域の横寸法よりも大きく、前記インナーパッドの横寸法が、前記アウターカバーの股下域の横寸法と略同一またはわずかに小さい請求項１〜３のいずれかに記載のおむつ。The lateral dimension of the front and rear waist area of the outer cover is larger than the lateral dimension of the crotch area of the outer cover, and the lateral dimension of the inner pad is substantially the same as or slightly smaller than the lateral dimension of the crotch area of the outer cover. The diaper in any one of Claims 1-3 . 前記横方向へ所与寸法離間して前記縦方向へ延びる一対のスリットが、前記アウターカバーの前胴周り域の胴周り端部に形成され、前記インナーパッドの横寸法が、前記スリットの間に延びる前記胴周り端部の横寸法と略同一またはわずかに小さい請求項１〜４のいずれかに記載のおむつ。A pair of slits extending in the vertical direction and spaced apart by a given dimension in the lateral direction are formed at the waist circumference end portion of the front waist circumference area of the outer cover, and the lateral dimension of the inner pad is between the slits. The diaper according to any one of claims 1 to 4, wherein the diaper is substantially the same as or slightly smaller than a lateral dimension of the end portion around the trunk.
JP2001284520A 2001-09-19 2001-09-19 Disposable diapers Expired - Fee Related JP5027364B2 (en)

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