JP3850102B2 - Absorbent articles - Google Patents

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JP3850102B2
JP3850102B2 JP13808997A JP13808997A JP3850102B2 JP 3850102 B2 JP3850102 B2 JP 3850102B2 JP 13808997 A JP13808997 A JP 13808997A JP 13808997 A JP13808997 A JP 13808997A JP 3850102 B2 JP3850102 B2 JP 3850102B2
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absorbent
groove
contact surface
surface side
skin contact
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JPH10328232A (en
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美次 濱島
哲哉 草川
泰生 豊島
稔 中西
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Kao Corp
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Kao Corp
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【0001】
【発明の属する技術分野】
本発明は、生理用ナプキンや失禁パッド等の、人間の股間に装着され体液を吸収する吸収性物品に関し、更に詳細には、多量の材料を必要とせず簡単な構成で、装着時にフィット性に優れた所定の形状となり、漏れ防止性に優れた吸収性物品に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
一般に、肌当接面側に液透過層と、非肌当接面側に液不透過層と、該液透過層及び該液不透過層の間に介在された吸収部とを備えた吸収性物品はよく知られている。この様な吸収性物品は、生理用ナプキン、失禁用パッド、パンティーライナー等として用いられており、装着者に良好にフィットし漏れを良好に防止することが大切である。
【0003】
そのため、従来より、吸収性物品をその幅方向中央を肌当接面側に高く形成することにより装着者に良好にフィットさせて漏れを回避する技術が種々提案されている。
特開昭61−56647号公報に記載の技術では、吸収性物品全体を折り畳んで幅方向中央部を肌当接面側に中高としている。また、特公平5−73419号公報に記載の技術では、幅方向中央部にもう一枚の吸収性物品を重ねて中高としている。更に、特開平8−117277号公報に記載の技術では、均一の厚さの吸収体の幅方向中央に合成繊維性の第2の吸収体をエンボス加工により一体化して設けて中高としている。特開平8−38550号公報に記載の技術では、吸収体の成形の段階から木材パルプや合成繊維により中高の厚みを有する吸収体を製造してして用いている。
【0004】
しかし、特開昭61−56647号公報に記載されるような、吸収性物品全体を折り畳む技術では、吸収部どうしの間に液不透過層を形成する裏面シート等の部材が介在配置されるために、体液の移行性に優れておらず実質的な体液の吸収能があまり増加されずに漏れ防止効果が不十分となる、構成材料全てが多量に必要である等の問題点がある。
特公平5−73419号公報に記載されるような、幅方向中央部に吸収性物品を重ねる技術では、重ねられた吸収性物品の吸収体間裏面シート等の液不透過性の部材が介在配置するために体液の移行性に優れておらず実質的な体液の吸収能があまり増加されずに漏れ防止効果が不十分となる、構造が複雑である等の問題点がある。
特開平8−117277号公報に記載されるような、幅方向中央に合成繊維性の第2の吸収体を一体化して設ける技術や、特開平8−38550号公報に記載されるような、中高の吸収体を製造して用いる技術では、幅方向中央における吸収能は増加されるが、側縁部がヨレ易く、側縁部におけるフィット性が損なわれて漏れにつながるおそれがある。
【0005】
従って、本発明の目的は、多量の材料を必要とせず簡単な構成で、装着時にフィット性に優れた所定の形状となり、漏れ防止性に優れた吸収性物品を提供することにある。
【0006】
本発明は、肌当接面側に液透過層と、非肌当接面側に液不透過層と、該液透過層及び該液不透過層の間に介在された吸収部とを備え、実質的に縦長に形成されてなる吸収性物品において、
上記吸収部の中央部に、肌当接面側へ隆起した上記吸収性物品の長手方向に延びる隆起部を備え、
上記吸収部は、上記隆起部が形成されている部分の2.5g/cm 2 加重下における厚みが、該隆起部が形成されていない部分の2.5g/cm 2 加重下における厚みより厚くなっており、
上記隆起部に対応する上記吸収部の非肌当接面側には、上記吸収性物品の長手方向に延びる溝を備えており、
上記液不透過層は液不透過性の裏面シートからなり、該裏面シートは、平面状に配され、且つ上記吸収部の上記溝に沿う溝加工が施されておらず、
上記吸収部に上記溝が複数設けられていることを特徴とする吸収性物品を提供することにより、上記目的を達成したものである。
【0007】
【発明の実施の形態】
以下、本発明の吸収性物品の一の実施形態について図面を参照しながら具体的に説明する。
図1は、本発明の吸収性物品の一の実施形態としての生理用ナプキンを肌当接面側から見た示す平面図であり、図2は、図1の生理用ナプキンのI−I断面図であり、図3は、図1の生理用ナプキンの吸収体のI−I断面図であり、図4は、図1の生理用ナプキンのJ−J断面図であり、図5は、図1の生理用ナプキンの吸収体を非肌当接面側から見た拡大平面図であり、図6は図1の生理用ナプキンの吸収体のK−K断面図であり、図7は図1の生理用ナプキンの装着状態を示すI−I断面図であり、図8は図1の生理用ナプキンの製造工程の一部を示す図である。
【0008】
本実施形態の吸収性物品(生理用ナプキン)1は、図1又は図2に示すように、肌当接面側に液透過層Pと、非肌当接面側に液不透過層Iと、該液透過層P及び該液不透過層Iの間に介在された吸収部Aとを備え、実質的に縦長に形成されている。
【0009】
更に詳述すると、本実施形態の生理用ナプキン1では、上記液透過層Pは液透過性の表面シート11により形成されており、上記液不透過層Iは液不透過性のシートである第1の裏面シート12a及び第2の裏面シート12bにより形成されており、吸収部Aは吸収体13により形成されている。
そして、本実施形態の生理用ナプキン1では、図2に示すように、吸収体13の非肌当接面側の面と両側面及び肌当接面側の面の両側縁部とが第2の裏面シート12bに被覆され、これら吸収体13と第2の裏面シート12bとが、表面シート11と第2の裏面シートの非肌当接面側に面接配置された上記第1の裏面シート12aとに挟持されてナプキン本体10が形成されている。このナプキン本体10は、両側縁部が肌当接面側から熱溶着加工が施されており、表面シート11及び第2の裏面シート12bが吸収体13に熱溶着された熱溶着部14,14が形成されている。表面シート11と吸収体13とはナプキン本体10の側縁部において熱溶着により固着されて熱溶着部14,14が形成されており、上記第2の裏面シート12bと吸収体13とはナプキン本体10の側縁部においてホットメルト剤15,15により固着されている。
【0010】
上記表面シート11及び上記第1の裏面シート12aはナプキン本体10の左右両側縁部から幅方向外方に延出されており、ウイング20,20が形成されている。
上記表面シート11と上記第1の裏面シート12aとはそれぞれの周縁部において互いに固着されている。
【0011】
上記第1の裏面シート12aには、ナプキン本体10の長手方向中央部において粘着剤が塗布又はされて粘着部16が形成されており、装着時に該粘着部16を介して生理用ナプキン1を下着に固定するようになっている。この粘着部16は剥離紙(図示せず)により保護されている。
【0012】
これらの構成については、従来の生理用ナプキンと同じであり、上記表面シート11の形成材料としては、不織布や開孔フィルム等、従来より用いられているものを特に制限なく用いることができる。上記第1の裏面シート12a及び上記第2の裏面シート12bの形成材料としても、防漏性のフィルム、ポリエチレンラミネート防水紙、ポリエチレンラミネート不織布等、従来より用いられているものを特に制限なく用いることができる。更に、上記熱溶着部14,14も従来の技術を特に制限なく用いて設けることができ、上記ホットメルト剤15,15も従来より用いられているものを特に制限なく用いることができる。上記粘着部16も、従来の粘着剤を特に制限なく用い従来の技術を特に制限なく用いて設けることができる。
【0013】
而して、本形態の生理用ナプキン1は、上記吸収体13の中央部に、図2及び図3にも示すように、肌当接面側へ隆起した、上記生理用ナプキン1の長手方向に延びる隆起部13aを備えており、上記隆起部13aに対応する吸収体13の非肌当接面側には、生理用ナプキン1の長手方向に延びる一対の溝17,17を備えている。
【0014】
更に詳述すると、本実施形態の生理用ナプキン1においては、上記吸収体13の隆起部13aは、図1に示すように、吸収体13の中央部から後方部にかけて形成されており、中央部においては幅広に、後方へゆくに従い先細に形成されている。また、中央部においては前方側と後方側とが最も幅広くその間において若干狭まって側縁が幅方向内側に凸の円弧形状をなすように形成されている。
上記隆起部13aは、該隆起部13aを装着者の体液排泄部に違和感なく且つ良好に当接させ優れた防漏性を得るためには、最も前方側における幅W1 は20〜60mmであり、中央部における最も幅狭な部分の幅W2 は15〜40mmであることが好ましい。
更に上記隆起部13aの吸収体13の中央部における円弧形状の側縁は、装着者の体液漏出部への良好なフィット性を得るためには、その曲率半径が30〜300mmであることが好ましいが、中央部における幅W2 が15〜40mmであれば、製造の容易から長方形のものとなっていても良い。
【0015】
上記吸収体13は、2.5g/cm2 加重下における隆起部13aの形成されている部分の厚み(図3に示すT1 )が7mmで、隆起部13aの形成されていない部分の厚み(図3に示すT2 )が4mmとなっており、隆起部13aの隆起高さ(隆起部13aの形成されている部分と隆起部13aの形成されていない部分との厚みの差、図3に示すT3 )が3mmとなっている。
隆起部13aの形成されている部分の2.5g/cm2 加重下における厚みT1 は3〜15mmであることが好ましく、5〜12mmであることがより好ましい。3mm未満では、中央部に好ましいフィット性を得る事が出来ず、15mm超では、逆に厚くなりすぎ違和感となってしまい好ましくない。
吸収体13の隆起部13aの形成されていない部分の2.5g/cm2 加重下における厚みT2 は1〜10mmであることが好ましく、2〜7mmであることがより好ましい。1mm未満では剛性が小さ過ぎて側縁部がヨレ易くなり、生理用ナプキン1の装着ときにおける断面形状を好ましいアーチ形態を形成、維持させることができ難く、10mm超では剛性が高くなりすぎたり生理用ナプキン1の厚みが厚くなりすぎたりして、装着時における違和感が大きくなる。
隆起部13aの2.5g/cm2 加重下における隆起高さT3 は装着者の体液漏出部に良好にフィットされ優れた漏れ防止性を得るには、2〜10mmであることが好ましく、2〜7mmであることがより好ましい。
【0016】
上記吸収体13を構成する材料としては、フラッフパルプ、吸収紙、高吸収性ポリマー等の、従来より吸収体を構成する材料として公知のものを特に制限なく用いることができるが、上記吸収体13の上記隆起部13aの上記溝17,17の設けられていない部分における非肌当接面側への幅方向の曲げ剛性(長さ方向断面は直線状に保持されるような曲げ剛性)は、1〜10gf・cm/3cmであるものが好ましい。該幅方向の曲げ剛性が1gf・cm/3cm未満では、隆起部の吸収体が柔らかすぎヨレてしまい10gf/cm/3cmを越えると逆に剛性が上がりすぎ違和感となってしまう。
尚、この曲げ剛性は、長手方向(生理用ナプキン1の長手方向)が30mm、幅方向(生理用ナプキン1の幅方向)が70mmの試料(隆起部13aと同様の厚さを有し溝17,17等を備えていない吸収体)を、カトーテック製純曲げ試験機にて1cm間隔のチャックに保持させ、試料を垂直にした状態で、曲率K=−2.5〜+2.5(cm-1)の範囲にて変形速度0.50(cm-1)/秒の等速度曲率の純曲げを行って曲げモーメントMを測定し、K=0.5〜1.5における試料の長さ単位当たりの曲げモーメント(M)−曲率(K)曲線の傾斜である単位面積当たりの曲げ剛性(B)を求めたものである。
【0017】
一対の上記溝17,17は、図1に示すように、平面視生理用ナプキン1の幅方向内側へ向けて凸の円弧状に左右対称に形成されており、その全長が、上記隆起部13aの中央部における側縁の一定距離分内側に対応する位置に配設されている。これらの溝17,17の生理用ナプキン1の幅方向における最内側部同士間の距離W3 は、5〜30mmとなっている。
また、この溝17,17の設けられている部分における上記吸収体13の隆起部13aの非肌当接面側への幅方向の曲げ剛性は0.2〜 2gf・cmとなっている。即ち、上記隆起部13aにおける、可撓軸として機能する上記溝7の設けられていない部分の曲げ剛性が、該溝17の設けられている部分における曲げ剛性に対し、1.5倍以上であることが好ましく、2〜10倍であることがより好ましい。この曲げ剛性の比が、1.5未満においては、可撓軸部分における積極的な屈曲がなくなるため、装着時に排泄部にフィットする望ましい装着形態をとり難くなるためである。
尚、可撓軸として機能する上記溝7の設けられた部分における曲げ剛性は、長手方向(生理用ナプキン1の長手方向)が30mm、幅方向(生理用ナプキン1の幅方向)が70mmの隆起部13aと同様の厚さを有する吸収体の非肌当接面側一面に溝17,17と同様の溝加工を施したものを試料として用いた場合の、試料の長さ単位当たりの曲げモーメント(M)−曲率(K)曲線の傾斜である単位面積当たりの曲げ剛性(B)を求めたものである。
【0018】
更に、上記溝17,17の曲率半径は30〜300mmであることが好ましいが、隆起部分と同様直線であっても良い。
また、上記溝17,17の深さD1 (図3参照)は、0.5〜10mmであり、隆起部の厚みT1 に対する溝の深さD1 の比(D1 /T1 )が、0.05〜0.7であることが好ましく、深さD1 が1〜5mmであり、上記比(D1 /T1 )が0.1〜0.5であることがより好ましい。溝17,17の深さD1 が0.5mm未満,比(D1 /T1 )が0.05未満であると、溝部分での可撓性が得にくく、好ましいフィット性を得難くなるので好ましくなく、逆に深さD1 が10mmを越え、比(D1 /T1 )が0.7を越えると、溝部分が高密度に圧縮され、隆起部分全体の厚みが低下してしまい好ましくない。
【0019】
更に、本実施形態の生理用ナプキン1の吸収体13は、図1及び図4に示すように、後方部の非肌当接面側に、幅方向中央において生理用ナプキン1の長手方向に延びる直線状の後方溝18を備えており、この後方溝18が生理用ナプキン1の装着時に吸収部13の後方部の可撓軸として機能して生理用ナプキン1の後方部の幅方向中央が逆V字形に容易に変形し装着者の臀部に良好にフィットするようになっている。
【0020】
この後方溝18の設けられている部分における上記吸収体13の非肌当接面側への幅方向の曲げ剛性は0.2〜2gf・cmとなっている。
尚、この曲げ剛性は、長手方向(生理用ナプキン1の長手方向)が30mm、幅方向(生理用ナプキン1の幅方向)が70mmの隆起部13aと同様の厚さを有する吸収体の非肌当接面側一面に後方溝18と同様の溝加工を施したものを試料として用いた場合の、試料の長さ単位当たりの曲げモーメント(M)−曲率(K)曲線の傾斜である単位面積当たりの曲げ剛性(B)を求めたものである。
また、上記後方溝18の深さD、及び該深さDの上記隆起部T1 の厚みに対する比(D/T1 )の好ましい範囲は、上記溝17,17におけるのと同様であり、溝18の深さDが0.5mm未満,比(D/T1 )が0.05未満であると、溝部分での可撓性が得にくく、好ましいフィット性を得難くなるので好ましくなく、逆に深さDが10mmを越え、比(D/T1 )が0.7を越えると、溝部分が高密度に圧縮され、隆起部分全体の厚みが低下してしまい好ましくない。
【0021】
上記吸収体13の非肌当接面側には、上記第2の裏面シート12bが平面状に配され、更に該第2の裏面シート12bの非肌当接面側に上記第1の裏面シート12aが平面状に配されている。
そして、両裏面シート12a,12bには、上記吸収体13の上記溝17,17及び後方溝18に沿う溝加工が施されていない。
【0022】
また、本実施形態の生理用ナプキン1のナプキン本体10は、肌当接面側から表面シート11と吸収体13とをともにエンボス加工することにより左右対称に形成された1対の表溝19,19を備えている。
この表溝19,19は、吸収体13の肌当接面側の面に、上記隆起部13aの側縁のすぐ外側に沿い、平面視生理用ナプキン1の幅方向内側へ向けて凸型の円弧状に形成されており、上記吸収体13がこの表溝19,19を可撓軸として容易に変形し易くなり、装着時に、隆起部13aを装着者側に凸の断面アーチ形状に変形させて該表溝19,19の幅方向外側はヨレることなく略水平方向に配置させ、且つ、隆起部13aの外側へ移行した体液を堰き止め後方へ移行させ、生理用ナプキン1の側縁部からの漏れを良好に防止するようになっている。
【0023】
上記表溝19,19は、その深さD2 (図3参照)が0.5〜9mmであり、溝の形成されていない部分の厚みT2 に対する比D2 /T2 が0.3〜0.9であることが好ましく、より好ましくはD2 が1〜6mmであり、D2 /T2 が0.5〜0.9である。表溝19,19の深さが0.5mm未満では、溝部分での可撓性が得にくく、好ましいフィット性が得られなかったり、表面を流れる体液を堰き止める効果が得難く好ましくなく、9mmを超えると装着者に違和感を与え好ましくない。
【0024】
以下、溝17,17、後方溝18、及び表溝19,19の好ましい溝構造について記載する。尚、ここでは溝17,17の好ましい構造について詳述するが、後方溝18、及び表溝19,19についても特に記載のない限り同様である。
上記溝17,17は、図6及び図7に示すように、菱形形状の小溝17aを複数個非連続的に形成させる溝加工を非肌当接面側から所定形状に沿って施し、小溝17a及び小溝17a間を連続的に非肌当接面側の面よりも窪ませた2段階の深さに形成されている。このように、小溝17a及び小溝17a間を連続的に肌当接面側の面よりも窪ませ2段階の深さに形成することにより、溝17,17の深さDを深く形成しつつ可撓性を高く保持し良好なフィット性を得ることが可能となる。上記小溝17aの大きさは、1〜100mm2 とするのが好ましい。1mm2 より小さいと圧縮面積が小さすぎて好ましい可撓性が得られず、逆に100mm2 を超えても好ましい可撓性が得られなくなる。また、各小溝17aのピッチは、0.5〜5mmとするのが好ましい。0.5mm未満であると、好ましい可撓性及び肌当たり性が得られず、5mmを超えると小溝17a間に窪まない部分が生じて幅方向のみならず、長手方向に変に屈曲し、長手方向のフィット性が低下する。また表溝19においては漏れ防止効果が小さくなる。
【0025】
尚、溝17,17、後方溝18、表溝19,19を、このように小溝17a及び小溝17a間を連続的に肌当接面側の面よりも窪ませ2段階の深さに形成することにより設けた場合、それらの深さは小溝17aにおける深さとする。
【0026】
本実施形態の生理用ナプキン1は、通常の生理用ナプキンと同様に中央部を股間に配置して粘着部16を下着Wに粘着させて装着する。
そしてこの様に装着された本実施形態の生理用ナプキン1は、図7に示すように、中央部に側方から幅方向の力が加えられ、溝17,17及び表溝19,19において屈曲して隆起部13間が肌当接面側に凸の断面アーチ状となって、装着者の股間に良好に当接される。
また、生理用ナプキン1の後方部は後方溝18において屈曲して装着者の臀部に沿って肌当接面側になだらかに隆起する。
この装着時における生理用ナプキン1の形状は、溝17,17、後方溝18及び表溝19,19により誘導形成されているので、いかなる装着状態にもかかわらず良好に維持される。
【0027】
この様に、本実施形態の生理用ナプキン1によると、溝17,17によって隆起部13aが肌当接面側に良好に隆起して装着者に良好に沿った形状となるので、良好なフィット性が発揮され、漏れが防止される。
本実施形態の生理用ナプキン1によると、後方溝18によって、生理用ナプキン1の後方部が肌当接面側に屈曲して装着者の臀部に沿って肌当接面側になだらかに隆起し、良好なフィット性が発揮され、漏れが防止される。
本実施形態の生理用ナプキン1によると、表溝19,19によって吸収体13がこの表溝19,19を可撓軸として容易に変形し易くなり、装着時に、表溝19,19の幅方向外側はヨレることなく略水平方向に配置されるので、良好なフィット性が発揮され、漏れが防止される。また、隆起部13aの外側へ移行した体液を堰き止め後方へ移行させるので、生理用ナプキン1の側縁部からの漏れが良好に防止される。
本実施形態の生理用ナプキン1によると、裏面シート12a,12bが、平面状に配され且つ吸収体13の上記溝17,17及び後方溝18に沿う溝加工が施されていないので、裏面シート12a,12bが容易には屈曲せず、ショーツにしっかりと固定することができ、また、装着操作時や装着中に粘着部16同士が接着してヨレてしまうこともない。これにより、良好なフィット性が得られると共に、漏れが良好に回避される。
本実施形態の生理用ナプキン1によると、吸収体13が1層であり、間に他の部材が入り込んでいない簡単な構造であり、不必要に多量の材料を用いることなく製造することができる。
【0028】
上記の本形態の生理用ナプキン1は、図8(a)に示すように、厚さ7mmで坪量が300g/m2 の吸収体13の連続体13’にエンボスロール等により圧縮(必要により加熱圧縮)加工を施して隆起部13aと溝17,17及び後方溝18を形成し(この工程に対応する吸収体を図8(a’)及び図8(a’’)に示す)、この後、第2の裏面シート12bの連続帯12b’を非肌当接面側から被覆し、図8(b)に示すように、表面シート11の連続帯11’で肌当接面側を被覆するとともに該表面シート11の連続帯11’側から表溝19,19を形成し(この工程に対応する生理用ナプキンを図8(b’)及び図8(b’’)に示す)、第1の裏面シート12aの連続体12a’で非肌当接面側を被覆し、周縁を固着するとともに所定形状に切断する等して容易に製造することができる。
【0029】
尚、本発明の吸収性物品は、上述の形態には何ら制限されず、本発明の趣旨を逸脱しない範囲で種々変更が可能である。
例えば、上記隆起部13aを矩形として溝17,17及び表溝19,19を直線状とすることもできるが、より股間にフィットさせ理想的な形態をとるためには、長手方向の中央部が幅方向中央側に湾曲した円弧状のものとすることが好ましい。
また、溝17,17、後方溝18及び表溝19,19は、いずれも上記実施形態のように前端から後端まで連続したものに限られるものではなく、長手方向の複数箇所において非連続に形成されたものとすることもできる。
【0030】
更に、溝17,17、後方溝18及び表溝19,19は、いずれも、上述のような小溝17aを連結したものではなく、連続して溝加工を施されたものとすることもできる。また、上述の実施形態のように長手方向において分割された非連続複数の小溝17aにより形成した場合に、小溝17aの形状等は特に限定されない。
吸収体13は、上述のように均一の厚みの吸収体にエンボス加工を施して隆起部13aを形成したものの他、図9に示すように均一の厚さの吸収体13b’の一部に他の吸収体13a’を重ねることにより隆起部を形成したものとしたり、はじめから、隆起部13aを有する形状に成形したものとすることもできる。
尚、図9に示すように吸収体13b’に他の吸収体13a’を重ねて隆起部を形成した場合には、上記吸収性物品の長手方向に延びる溝17,17を、同図に示されるように隆起部に対応する上記吸収体13b’の非肌当接面側の面に形成しても良いが、図10に示すように、上記吸収体13a’の非肌当接面側の面に形成しても良い。この態様も、本発明の一実施形態である。
また、第2の裏面シート12bは溝17,17に沿って配置し、第1の裏面シート12aのみを平面状に配置しても同様の効果を得ることができる。
吸収性物品は、生理用ナプキンの外、失禁者用パッド、おりものシート等とすることもできる。
【0031】
【発明の効果】
以上説明した様に、本発明の吸収性物品は、多量の材料を必要とせず簡単な構成で、装着時にフィット性に優れた所定の形状となり、漏れ防止性に優れたものである。
【図面の簡単な説明】
【図1】本発明の吸収性物品の一の実施形態としての生理用ナプキンを肌当接面側から見た示す平面図である。
【図2】図1の生理用ナプキンのI−I断面である。
【図3】図1の生理用ナプキンの吸収体のI−I断面図である。
【図4】図1の生理用ナプキンのJ−J断面図である。
【図5】図1の生理用ナプキンの吸収体を非肌当接面側から見た拡大平面図である。
【図6】図1の生理用ナプキンの吸収体のK−K断面図である。
【図7】図1の生理用ナプキンの装着状態を示すI−I断面図である。
【図8】図1の生理用ナプキンの製造工程の一部を示す図であり、(a)は吸収体の製造工程を示し、(b)は表面シートの被覆工程を示す図である。
【図9】本発明の吸収性物品の他の実施形態における吸収体を示す断面図であり、図3に相当する図である。
【図10】本発明の吸収性物品の更に他の実施形態における吸収体を示す断面図であり、図3に相当する図である。
【符号の説明】
1 生理用ナプキン(吸収性物品)
10 ナプキン本体
11 表面シート
12 裏面シート
13 吸収体(吸収部)
13a 隆起部
14 熱溶着部
15 ホットメルト剤
16 粘着部
17 溝
18 後方溝
19 表溝
20 ウイング
P 液透過層
I 液不透過層
A 吸収部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article, such as a sanitary napkin or an incontinence pad, that is worn between human groins and absorbs bodily fluids. The present invention relates to an absorbent article having an excellent predetermined shape and excellent leakage prevention.
[0002]
[Prior art and problems to be solved by the invention]
Generally, an absorptivity provided with a liquid permeable layer on the skin contact surface side, a liquid impermeable layer on the non-skin contact surface side, and an absorbent portion interposed between the liquid permeable layer and the liquid impermeable layer The article is well known. Such absorbent articles are used as sanitary napkins, incontinence pads, panty liners, etc., and it is important to fit well to the wearer and prevent leakage.
[0003]
For this reason, conventionally, various techniques have been proposed in which the absorbent article is formed so that its center in the width direction is high on the skin contact surface side so that the wearer can be fitted well and leakage is avoided.
In the technique described in Japanese Patent Application Laid-Open No. 61-56647, the entire absorbent article is folded so that the central portion in the width direction is a middle height on the skin contact surface side. Moreover, in the technique described in Japanese Patent Publication No. 5-73419, another absorbent article is stacked at the center in the width direction so as to have a middle and high height. Furthermore, in the technique described in Japanese Patent Application Laid-Open No. 8-117277, a synthetic fibrous second absorbent body is integrally provided by embossing at the center in the width direction of the absorbent body having a uniform thickness to obtain a medium-high height. In the technique described in JP-A-8-38550, an absorber having a medium to high thickness is produced and used from wood pulp or synthetic fiber from the stage of forming the absorber.
[0004]
However, in the technique for folding the entire absorbent article as described in JP-A-61-56647, a member such as a back sheet that forms a liquid-impermeable layer is interposed between the absorbent parts. In addition, there is a problem that the ability to absorb body fluid is not excellent and the ability to absorb substantial body fluid is not increased so much that the effect of preventing leakage is insufficient, and a large amount of all the constituent materials are required.
As described in Japanese Patent Publication No. 5-73419, in the technology of stacking absorbent articles in the center in the width direction, liquid-impermeable members such as back sheets between absorbent bodies of the stacked absorbent articles are disposed interveningly Therefore, there is a problem in that the ability to absorb body fluid is not excellent and the ability to absorb substantial body fluid is not increased so much that the effect of preventing leakage is insufficient, and the structure is complicated.
As described in JP-A-8-117277, a technique in which a synthetic fibrous second absorber is integrally provided at the center in the width direction, or as described in JP-A-8-38550, In the technique of manufacturing and using this absorbent body, the absorptivity at the center in the width direction is increased, but the side edge portion is easily twisted, and the fit at the side edge portion may be impaired, leading to leakage.
[0005]
Accordingly, an object of the present invention is to provide an absorbent article that has a simple configuration that does not require a large amount of material, has a predetermined shape that is excellent in fit at the time of wearing, and is excellent in leakage prevention.
[0006]
The present invention comprises a liquid permeable layer on the skin contact surface side, a liquid impermeable layer on the non-skin contact surface side, and an absorbent portion interposed between the liquid permeable layer and the liquid impermeable layer, In the absorbent article formed substantially vertically long,
In the central part of the absorbent part, provided with a raised part extending in the longitudinal direction of the absorbent article raised to the skin contact surface side,
In the absorbing portion, the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is formed is thicker than the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is not formed. And
On the non-skin contact surface side of the absorbent portion corresponding to the raised portion, a groove extending in the longitudinal direction of the absorbent article is provided,
The liquid impervious layer is made of a liquid impervious back sheet, the back sheet is arranged in a planar shape, and is not subjected to groove processing along the groove of the absorbing portion ,
The object is achieved by providing an absorbent article characterized in that a plurality of the grooves are provided in the absorbent section .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, one embodiment of an absorbent article of the present invention will be specifically described with reference to the drawings.
1 is a plan view showing a sanitary napkin as an embodiment of the absorbent article of the present invention as viewed from the skin contact surface side, and FIG. 2 is a cross-sectional view taken along the line II of the sanitary napkin of FIG. FIG. 3 is a cross-sectional view taken along the line II of the absorbent body of the sanitary napkin of FIG. 1, FIG. 4 is a cross-sectional view of the sanitary napkin of FIG. FIG. 6 is an enlarged plan view of the sanitary napkin absorbent body of FIG. 1 as viewed from the non-skin contact surface side, FIG. 6 is a KK cross-sectional view of the sanitary napkin absorbent body of FIG. It is II sectional drawing which shows the mounting state of this sanitary napkin, and FIG. 8 is a figure which shows a part of manufacturing process of the sanitary napkin of FIG.
[0008]
As shown in FIG. 1 or 2, the absorbent article (sanitary napkin) 1 of the present embodiment has a liquid permeable layer P on the skin contact surface side and a liquid impermeable layer I on the non-skin contact surface side. And an absorption part A interposed between the liquid-permeable layer P and the liquid-impermeable layer I, and is formed substantially vertically.
[0009]
More specifically, in the sanitary napkin 1 of the present embodiment, the liquid permeable layer P is formed by a liquid permeable top sheet 11, and the liquid impermeable layer I is a liquid impermeable sheet. The first back sheet 12 a and the second back sheet 12 b are formed, and the absorber A is formed by the absorber 13.
And in the sanitary napkin 1 of this embodiment, as shown in FIG. 2, the surface of the absorber 13 on the non-skin contact surface side, both side surfaces, and both side edges of the surface on the skin contact surface side are second. The first back sheet 12a is covered with the back sheet 12b, and the absorbent body 13 and the second back sheet 12b are disposed in contact with the non-skin contact surface side of the top sheet 11 and the second back sheet. The napkin body 10 is formed between the two. As for this napkin main body 10, both sides edge is heat-welded from the skin contact surface side, and the heat-welding parts 14 and 14 by which the surface sheet 11 and the 2nd back surface sheet 12b were heat-welded to the absorber 13 were carried out. Is formed. The top sheet 11 and the absorbent body 13 are fixed to each other at the side edge portion of the napkin body 10 by heat welding to form heat welded portions 14, 14. The second back sheet 12 b and the absorbent body 13 are formed from the napkin body. 10 side edges are fixed by hot melt agents 15 and 15.
[0010]
The top sheet 11 and the first back sheet 12a are extended outward in the width direction from the left and right side edges of the napkin body 10, and wings 20 and 20 are formed.
The top sheet 11 and the first back sheet 12a are fixed to each other at their peripheral portions.
[0011]
Adhesive is applied or formed on the first back sheet 12a in the longitudinal center of the napkin body 10 to form an adhesive part 16, and the sanitary napkin 1 is put on the underwear through the adhesive part 16 when worn. It is supposed to be fixed to. The adhesive portion 16 is protected by a release paper (not shown).
[0012]
About these structures, it is the same as the conventional sanitary napkin, and as a forming material of the said surface sheet 11, what is conventionally used, such as a nonwoven fabric and an apertured film, can be especially used without a restriction | limiting. As a material for forming the first back sheet 12a and the second back sheet 12b, a material that has been conventionally used, such as a leak-proof film, a polyethylene laminated waterproof paper, and a polyethylene laminated nonwoven fabric, is used without particular limitation. Can do. Furthermore, the heat welding parts 14 and 14 can also be provided using a conventional technique without any particular limitation, and the hot melt agents 15 and 15 that have been conventionally used can be used without any particular limitation. The pressure-sensitive adhesive portion 16 can also be provided using a conventional pressure-sensitive adhesive without particular limitation and without particular limitation.
[0013]
Thus, the sanitary napkin 1 according to the present embodiment has the longitudinal direction of the sanitary napkin 1 raised at the center of the absorbent body 13 toward the skin contact surface as shown in FIGS. 2 and 3. And a pair of grooves 17 and 17 extending in the longitudinal direction of the sanitary napkin 1 are provided on the non-skin contact surface side of the absorbent body 13 corresponding to the raised portion 13a.
[0014]
More specifically, in the sanitary napkin 1 of the present embodiment, the raised portion 13a of the absorbent body 13 is formed from the central portion to the rear portion of the absorbent body 13 as shown in FIG. Is wide and tapered toward the rear. Further, in the central part, the front side and the rear side are the widest and slightly narrowed between them, and the side edges are formed in a convex arc shape inward in the width direction.
In order to obtain an excellent leak-proof property, the width W 1 on the most front side is 20 to 60 mm. The width W 2 of the narrowest part in the central part is preferably 15 to 40 mm.
Further, the arc-shaped side edge of the central portion of the absorbent body 13 of the raised portion 13a preferably has a curvature radius of 30 to 300 mm in order to obtain a good fit to the body fluid leakage portion of the wearer. However, if the width W 2 at the central portion is 15 to 40 mm, it may be rectangular for ease of manufacture.
[0015]
The absorber 13 has a thickness (T 1 shown in FIG. 3) where the raised portion 13a is formed under a load of 2.5 g / cm 2 of 7 mm, and a thickness of a portion where the raised portion 13a is not formed (T 1 shown in FIG. 3). T 2 shown in FIG. 3 is 4 mm, and the height of the raised portion 13a (the difference in thickness between the portion where the raised portion 13a is formed and the portion where the raised portion 13a is not formed is shown in FIG. T 3 ) shown is 3 mm.
The thickness T 1 under a load of 2.5 g / cm 2 of the portion where the raised portion 13a is formed is preferably 3 to 15 mm, and more preferably 5 to 12 mm. If it is less than 3 mm, a favorable fit cannot be obtained in the central part, and if it exceeds 15 mm, the film becomes too thick and uncomfortable.
The thickness T 2 under a load of 2.5 g / cm 2 of the portion where the raised portion 13a of the absorbent body 13 is not formed is preferably 1 to 10 mm, and more preferably 2 to 7 mm. If it is less than 1 mm, the rigidity is too small and the side edge portion is easily twisted, and it is difficult to form and maintain a preferable arch shape when the sanitary napkin 1 is mounted. The thickness of the napkin 1 for use becomes too thick, and the uncomfortable feeling at the time of wearing becomes large.
The height T 3 of the raised portion 13a under a load of 2.5 g / cm 2 is preferably 2 to 10 mm in order to fit well to the body fluid leaking portion of the wearer and obtain excellent leakage prevention properties. More preferably, it is ˜7 mm.
[0016]
As the material constituting the absorbent body 13, conventionally known materials constituting the absorbent body such as fluff pulp, absorbent paper, and superabsorbent polymer can be used without particular limitation. The bending rigidity in the width direction toward the non-skin contact surface side (the bending rigidity such that the cross section in the length direction is held in a straight line) in the portion where the grooves 17 and 17 of the protruding portion 13a are not provided is What is 1-10 gf * cm / 3cm is preferable. If the bending rigidity in the width direction is less than 1 gf · cm / 3 cm, the absorbent body of the raised portion is too soft, and if it exceeds 10 gf / cm / 3 cm, the rigidity is excessively increased, which makes it uncomfortable.
This bending stiffness is a sample (thickness similar to that of the raised portion 13a) having a thickness of 30 mm in the longitudinal direction (longitudinal direction of the sanitary napkin 1) and 70 mm in the width direction (width direction of the sanitary napkin 1). , 17 etc.) is held on a chuck with a spacing of 1 cm by a pure bending tester manufactured by Kato Tech, and the sample is vertical, the curvature K = −2.5 to +2.5 (cm -1 )), the bending moment M was measured by performing a pure bending with a constant velocity curvature of 0.50 (cm -1 ) / sec in the range of the sample length at K = 0.5 to 1.5. The bending stiffness (B) per unit area, which is the inclination of the bending moment (M) -curvature (K) curve per unit, is obtained.
[0017]
As shown in FIG. 1, the pair of grooves 17 and 17 are formed symmetrically in a convex arc shape toward the inner side in the width direction of the sanitary napkin 1 in plan view, and the total length thereof is the raised portion 13a. It is arrange | positioned in the position corresponding to the inner side by the fixed distance of the side edge in the center part. Distance W 3 between the innermost portions in the width direction of the sanitary napkin 1 of the grooves 17, 17 has a 5 to 30 mm.
Moreover, the bending rigidity of the width direction to the non-skin contact surface side of the protruding portion 13a of the absorber 13 in the portion where the grooves 17 and 17 are provided is 0.2 to 2 gf · cm. That is, the bending rigidity of the raised portion 13a where the groove 7 that functions as a flexible shaft is not provided is 1.5 times or more than the bending rigidity of the portion where the groove 17 is provided. It is preferable that the ratio is 2 to 10 times. This is because, when the ratio of the bending rigidity is less than 1.5, positive bending at the flexible shaft portion is lost, and it is difficult to take a desirable mounting form that fits the excretory part during mounting.
The bending rigidity in the portion provided with the groove 7 functioning as a flexible shaft is a bulge whose longitudinal direction (longitudinal direction of the sanitary napkin 1) is 30 mm and whose width direction (width direction of the sanitary napkin 1) is 70 mm. Bending moment per unit length of the sample when a non-skin contact surface side surface of the absorber having the same thickness as the portion 13a is subjected to groove processing similar to the grooves 17 and 17 as a sample The bending stiffness (B) per unit area, which is the slope of the (M) -curvature (K) curve, is obtained.
[0018]
Further, the radius of curvature of the grooves 17 and 17 is preferably 30 to 300 mm, but may be a straight line like the raised portion.
The depth D 1 (see FIG. 3) of the grooves 17 and 17 is 0.5 to 10 mm, and the ratio of the groove depth D 1 to the thickness T 1 of the raised portion (D 1 / T 1 ) is 0.05 to 0.7, the depth D 1 is 1 to 5 mm, and the ratio (D 1 / T 1 ) is more preferably 0.1 to 0.5. When the depth D 1 of the grooves 17 and 17 is less than 0.5 mm and the ratio (D 1 / T 1 ) is less than 0.05, it is difficult to obtain flexibility at the groove portion, and it is difficult to obtain preferable fit. On the contrary, if the depth D 1 exceeds 10 mm and the ratio (D 1 / T 1 ) exceeds 0.7, the groove portion is compressed with a high density and the thickness of the entire raised portion is reduced. It is not preferable.
[0019]
Furthermore, the absorbent body 13 of the sanitary napkin 1 of the present embodiment extends in the longitudinal direction of the sanitary napkin 1 at the center in the width direction on the non-skin contact surface side of the rear part, as shown in FIGS. 1 and 4. A straight rear groove 18 is provided, and this rear groove 18 functions as a flexible shaft at the rear portion of the absorbent portion 13 when the sanitary napkin 1 is attached, and the center in the width direction of the rear portion of the sanitary napkin 1 is reversed. It is easily deformed into a V shape and fits well to the wearer's buttocks.
[0020]
The bending rigidity in the width direction toward the non-skin contact surface side of the absorber 13 in the portion where the rear groove 18 is provided is 0.2 to 2 gf · cm.
This bending rigidity is the non-skin of the absorbent body having the same thickness as the raised portion 13a whose longitudinal direction (longitudinal direction of the sanitary napkin 1) is 30 mm and whose width direction (width direction of the sanitary napkin 1) is 70 mm. Unit area that is the slope of the bending moment (M) -curvature (K) curve per unit length of the sample when the same grooved surface as the rear groove 18 is used as the sample The bending rigidity (B) is determined.
The preferable range of the depth D of the rear groove 18 and the ratio (D / T 1 ) of the depth D to the thickness of the raised portion T 1 is the same as that in the grooves 17 and 17. If the depth D of 18 is less than 0.5 mm and the ratio (D / T 1 ) is less than 0.05, it is difficult to obtain flexibility at the groove portion, and it is difficult to obtain a preferable fit. If the depth D exceeds 10 mm and the ratio (D / T 1 ) exceeds 0.7, the groove portion is compressed with high density, and the thickness of the entire raised portion is reduced, which is not preferable.
[0021]
On the non-skin contact surface side of the absorbent body 13, the second back sheet 12b is arranged in a flat shape, and further, the first back sheet on the non-skin contact surface side of the second back sheet 12b. 12a is arranged in a planar shape.
And both the back surface sheets 12a and 12b are not subjected to groove processing along the grooves 17 and 17 and the rear groove 18 of the absorber 13.
[0022]
Further, the napkin body 10 of the sanitary napkin 1 according to the present embodiment has a pair of front grooves 19 formed symmetrically by embossing the top sheet 11 and the absorber 13 from the skin contact surface side. 19 is provided.
The front grooves 19, 19 are convex on the surface of the absorbent body 13 on the skin contact surface side, along the outer side of the side edge of the raised portion 13 a and toward the inner side in the width direction of the planar view sanitary napkin 1. It is formed in a circular arc shape, and the absorber 13 is easily deformed with the front grooves 19 and 19 as flexible shafts, and at the time of wearing, the raised portion 13a is deformed into a convex cross-sectional arch shape on the wearer side. Thus, the outer side in the width direction of the front grooves 19, 19 is arranged in a substantially horizontal direction without twisting, and the body fluid that has moved to the outside of the raised portion 13 a is transferred to the back side of the dam, and the side edge of the sanitary napkin 1 It is designed to prevent leakage from the water well.
[0023]
The front grooves 19 and 19 have a depth D 2 (see FIG. 3) of 0.5 to 9 mm, and a ratio D 2 / T 2 to a thickness T 2 of a portion where no groove is formed is 0.3 to preferably from 0.9, more preferably D 2 is 1 to 6 mm, D 2 / T 2 is 0.5 to 0.9. If the depth of the front grooves 19 and 19 is less than 0.5 mm, it is difficult to obtain flexibility at the groove portion, and a favorable fit cannot be obtained, or it is difficult to obtain an effect of blocking body fluid flowing on the surface. Exceeding this is not preferable because it causes the wearer to feel uncomfortable.
[0024]
Hereinafter, a preferable groove structure of the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 will be described. Although the preferred structure of the grooves 17 and 17 will be described in detail here, the same applies to the rear groove 18 and the front grooves 19 and 19 unless otherwise specified.
As shown in FIGS. 6 and 7, the grooves 17, 17 are subjected to groove processing for forming a plurality of rhombus-shaped small grooves 17 a discontinuously along the predetermined shape from the non-skin contact surface side. In addition, the small groove 17a is formed to have a two-stage depth that is continuously recessed from the surface on the non-skin contact surface side. In this way, by forming the depth between the small grooves 17a and the small grooves 17a continuously from the surface on the skin contact surface side to a two-stage depth, the depth D of the grooves 17, 17 can be formed deeply. It is possible to maintain a high flexibility and obtain a good fit. The size of the small groove 17a is preferably 1 to 100 mm 2 . If it is less than 1 mm 2 , the compression area is too small to obtain preferable flexibility, and conversely, if it exceeds 100 mm 2 , preferable flexibility cannot be obtained. Moreover, it is preferable that the pitch of each small groove 17a shall be 0.5-5 mm. When the thickness is less than 0.5 mm, preferable flexibility and skin contact property cannot be obtained, and when the thickness exceeds 5 mm, a portion that does not sink between the small grooves 17a is generated and bent not only in the width direction but also in the longitudinal direction. The direction fit is reduced. Further, the leakage preventing effect is reduced in the front groove 19.
[0025]
The grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are formed in such a manner that the space between the small groove 17a and the small groove 17a is continuously recessed from the surface on the skin contact surface side in two steps. If provided, the depth is the depth in the small groove 17a.
[0026]
The sanitary napkin 1 according to the present embodiment is attached by attaching the adhesive portion 16 to the undergarment W with the central portion disposed between the crotch like a normal sanitary napkin.
Then, the sanitary napkin 1 of the present embodiment mounted in this way is bent in the grooves 17 and 17 and the front grooves 19 and 19 as shown in FIG. Thus, the ridges 13 are formed in a cross-section arch shape convex toward the skin contact surface side, so that they are in good contact with the wearer's crotch.
Further, the rear part of the sanitary napkin 1 is bent at the rear groove 18 and gently rises toward the skin contact surface side along the wearer's buttocks.
The shape of the sanitary napkin 1 at the time of wearing is guided and formed by the grooves 17, 17, the rear groove 18, and the front grooves 19, 19, so that the sanitary napkin 1 is well maintained regardless of any wearing state.
[0027]
As described above, according to the sanitary napkin 1 of the present embodiment, the raised portions 13a are well raised on the skin contact surface side by the grooves 17 and 17, and the shape fits well to the wearer. Performance is demonstrated and leakage is prevented.
According to the sanitary napkin 1 of this embodiment, the rear portion of the sanitary napkin 1 is bent toward the skin contact surface side by the rear groove 18 and gently rises toward the skin contact surface side along the wearer's buttocks. Good fit is exhibited and leakage is prevented.
According to the sanitary napkin 1 of the present embodiment, the absorbent body 13 is easily deformed by the front grooves 19, 19 using the front grooves 19, 19 as flexible shafts. Since the outside is arranged in a substantially horizontal direction without twisting, good fit is exhibited and leakage is prevented. Moreover, since the bodily fluid which moved to the outer side of the protruding part 13a is dammed and transferred to the rear side, leakage from the side edge of the sanitary napkin 1 is prevented well.
According to the sanitary napkin 1 of the present embodiment, the back sheets 12a and 12b are arranged in a plane and are not subjected to groove processing along the grooves 17 and 17 and the rear groove 18 of the absorber 13, so that the back sheet 12a and 12b are not easily bent and can be firmly fixed to the shorts, and the adhesive portions 16 are not bonded to each other during the mounting operation or during mounting. As a result, good fit is obtained, and leakage is well avoided.
According to the sanitary napkin 1 of the present embodiment, the absorbent body 13 is a single layer and has a simple structure in which no other member is interposed therebetween, and can be manufactured without using an unnecessarily large amount of material. .
[0028]
As shown in FIG. 8A, the sanitary napkin 1 according to the present embodiment is compressed by an embossing roll or the like on a continuous body 13 ′ of an absorbent body 13 having a thickness of 7 mm and a basis weight of 300 g / m 2 (if necessary). Heat-pressing) to form the raised portion 13a and the grooves 17, 17 and the rear groove 18 (absorbers corresponding to this step are shown in FIG. 8 (a ′) and FIG. 8 (a ″)). Then, the continuous band 12b ′ of the second back sheet 12b is covered from the non-skin contact surface side, and the skin contact surface side is covered with the continuous band 11 ′ of the top sheet 11 as shown in FIG. At the same time, surface grooves 19 and 19 are formed from the continuous belt 11 ′ side of the top sheet 11 (a sanitary napkin corresponding to this step is shown in FIG. 8 (b ′) and FIG. 8 (b ″)). The non-skin contact surface side is covered with a continuous body 12a ′ of one back sheet 12a, and the periphery is fixed and cut into a predetermined shape. It can be easily manufactured.
[0029]
In addition, the absorbent article of this invention is not restrict | limited at all to the above-mentioned form, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, the ridges 13a can be rectangular and the grooves 17, 17 and the front grooves 19, 19 can be straight. However, in order to fit the crotch and take an ideal form, the central part in the longitudinal direction is It is preferable to use an arc shape that is curved toward the center in the width direction.
Further, the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are not limited to those that are continuous from the front end to the rear end as in the above-described embodiment, and are not continuous at a plurality of locations in the longitudinal direction. It can also be formed.
[0030]
Further, the grooves 17, 17, the rear groove 18, and the front grooves 19, 19 are not connected to the small groove 17a as described above, and can be continuously grooved. Moreover, when formed with the discontinuous several small groove | channel 17a divided | segmented in the longitudinal direction like the above-mentioned embodiment, the shape etc. of the small groove 17a are not specifically limited.
The absorbent body 13 is formed by embossing the absorbent body having a uniform thickness as described above to form a raised portion 13a, as well as a part of the absorbent body 13b 'having a uniform thickness as shown in FIG. It is also possible to form a raised portion by overlapping the absorbent bodies 13a ′, or to form the raised portion 13a from the beginning.
In addition, as shown in FIG. 9, when other absorber 13a 'is piled up on absorber 13b', and the protruding part is formed, the groove | channels 17 and 17 extended in the longitudinal direction of the said absorbent article are shown in the figure. May be formed on the non-skin contact surface side surface of the absorbent body 13b ′ corresponding to the raised portion, as shown in FIG. 10, on the non-skin contact surface side of the absorbent body 13a ′. It may be formed on the surface. This aspect is also an embodiment of the present invention.
Moreover, the same effect can be acquired even if it arrange | positions the 2nd back surface sheet 12b along the groove | channels 17 and 17 and arrange | positions only the 1st back surface sheet 12a in planar shape.
The absorbent article can be a sanitary napkin, an incontinence pad, a cage sheet, or the like.
[0031]
【The invention's effect】
As described above, the absorbent article of the present invention does not require a large amount of material, has a simple configuration, has a predetermined shape with excellent fit when mounted, and has excellent leakage prevention properties.
[Brief description of the drawings]
FIG. 1 is a plan view showing a sanitary napkin as an embodiment of an absorbent article of the present invention as viewed from the skin contact surface side.
2 is a cross-sectional view taken along the line II of the sanitary napkin of FIG.
3 is a cross-sectional view taken along the line II of the absorbent body of the sanitary napkin of FIG. 1. FIG.
4 is a JJ cross-sectional view of the sanitary napkin of FIG.
FIG. 5 is an enlarged plan view of the absorbent body of the sanitary napkin of FIG. 1 as viewed from the non-skin contact surface side.
6 is a cross-sectional view taken along the line KK of the absorbent body of the sanitary napkin of FIG. 1. FIG.
7 is a cross-sectional view taken along the line II showing a state where the sanitary napkin of FIG. 1 is attached.
8 is a view showing a part of the manufacturing process of the sanitary napkin of FIG. 1, (a) showing the manufacturing process of the absorbent body, and (b) showing the covering process of the top sheet.
FIG. 9 is a cross-sectional view showing an absorbent body according to another embodiment of the absorbent article of the present invention, corresponding to FIG.
FIG. 10 is a cross-sectional view showing an absorbent body according to still another embodiment of the absorbent article of the present invention, and is a view corresponding to FIG.
[Explanation of symbols]
1 Sanitary napkin (absorbent article)
10 Napkin body 11 Top sheet 12 Back sheet 13 Absorber (absorbing part)
13a Raised portion 14 Heat welded portion 15 Hot melt agent 16 Adhesive portion 17 Groove 18 Rear groove 19 Front groove 20 Wing P Liquid permeable layer I Liquid impermeable layer A Absorbing portion

Claims (4)

肌当接面側に液透過層と、非肌当接面側に液不透過層と、該液透過層及び該液不透過層の間に介在された吸収部とを備え、実質的に縦長に形成されてなる吸収性物品において、
上記吸収部の中央部に、肌当接面側へ隆起した上記吸収性物品の長手方向に延びる隆起部を備え、
上記吸収部は、上記隆起部が形成されている部分の2.5g/cm 2 加重下における厚みが、該隆起部が形成されていない部分の2.5g/cm 2 加重下における厚みより厚くなっており、
上記隆起部に対応する上記吸収部の非肌当接面側には、上記吸収性物品の長手方向に延びる溝を備えており、
上記液不透過層は液不透過性の裏面シートからなり、該裏面シートは、平面状に配され、且つ上記吸収部の上記溝に沿う溝加工が施されておらず、
上記吸収部に上記溝が複数設けられていることを特徴とする吸収性物品。
A liquid-permeable layer on the skin contact surface side, a liquid-impermeable layer on the non-skin-contact surface side, and an absorbent portion interposed between the liquid-permeable layer and the liquid-impermeable layer, and substantially vertically long In the absorbent article formed in,
In the central part of the absorbent part, provided with a raised part extending in the longitudinal direction of the absorbent article raised to the skin contact surface side,
In the absorbing portion, the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is formed is thicker than the thickness under the 2.5 g / cm 2 load of the portion where the raised portion is not formed. And
On the non-skin contact surface side of the absorbent portion corresponding to the raised portion, a groove extending in the longitudinal direction of the absorbent article is provided,
The liquid impervious layer is made of a liquid impervious back sheet, the back sheet is arranged in a planar shape, and is not subjected to groove processing along the groove of the absorbing portion ,
An absorbent article comprising a plurality of the grooves in the absorbent portion .
上記吸収部の上記中央部の2.5g/cm2 加重下における厚みが3〜15mmであり、且つその隆起高さが2〜10mmであることを特徴とする請求項1に記載の吸収性物品。A thickness at 2.5 g / cm 2 weight under the central portion of the absorbent portion is 3 to 15 mm, and the absorbent article according to claim 1 in which the raised height is characterized in that it is a 2~10mm . 上記吸収部の上記隆起部の上記溝の設けられていない部分における非肌当接面側への幅方向の曲げ剛性が1〜10gf・cmであり、上記吸収部の上記隆起部の上記溝の設けられている部分における非肌当接面側への幅方向の曲げ剛性が0.2〜2gf・cmであり、上記隆起部の上記溝の設けられていない部分の上記溝の設けられている部分に対する幅方向の曲げ剛性の比が1.5以上であることを特徴とする請求項1又は請求項2に記載の吸収性物品。  The bending rigidity in the width direction toward the non-skin contact surface side in the portion of the raised portion of the absorbent portion where the groove is not provided is 1 to 10 gf · cm, and the groove of the raised portion of the absorbent portion The bending rigidity in the width direction toward the non-skin contact surface side in the provided portion is 0.2 to 2 gf · cm, and the groove is provided in the portion of the raised portion where the groove is not provided. The absorbent article according to claim 1 or 2, wherein the ratio of the bending rigidity in the width direction to the portion is 1.5 or more. 上記吸収部が、折り重ねた部分を有しない一枚の吸収体からなる請求項1〜3の何れかに記載の吸収性物品 The absorptive article according to any one of claims 1 to 3 in which said absorption part consists of one absorber which does not have a folded portion .
JP13808997A 1997-05-28 1997-05-28 Absorbent articles Expired - Fee Related JP3850102B2 (en)

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