JP2022519610A - 改善された肌触りを有する不織布トップシートを有する女性用衛生パッド - Google Patents
改善された肌触りを有する不織布トップシートを有する女性用衛生パッド Download PDFInfo
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Abstract
Description
水平面上で開かれ、平らに置かれた女性用衛生パッドに関して、「横方向」は、長手方向に対して垂直でかつ水平平面に平行な方向を指す。
図1及び図2Aを参照すると、女性用衛生パッド10は、液体透過性トップシート20と、液体不透過性バックシート30と、トップシートとバックシートとの間に配設された吸収性層40と、を含むことができる。この吸収性層は、外周部41を有する。外周部41の外側の領域では、トップシート及びバックシートは、接着剤結合、熱接着、圧力結合などを含むがこれらに限定されない任意の好適な機構によって、積層された様式で一緒に結合されてもよく、それによって、トップシート20とバックシート30との間の適所に吸収性層40を維持及び保持することができる。パッド10は、パッドの主部分よりも相対的に大きい幅寸法によって外周部41の外側に横方向に延在する対向するウィング部分15を含んでもよい。主部分及びウィング部分の下面を形成するバックシートの外側表面は、その上に接着剤35の堆積物を有してもよい。接着剤堆積物35は、ユーザがパッドをその股領域内のパンツの内側に接着させて、ウィング部分を下着の脚部開口部の内側縁部を通してそこに巻き付け、それらを股部領域の下着の外側/下側に接着させることを可能にするために提供され、補助保持支持体を提供し、下着の脚縁部を汚すことから保護することを助けることができる。パッド10がパッケージ化されるとき、接着剤堆積物35は、剥離フィルム又は紙の1枚以上のシート(図示せず)によって被覆されてもよい。剥離フィルム又は紙は、ユーザが剥離フィルム又は紙を除去し、使用のためにパッドを配置するまで、他の表面と接触しないように接着剤堆積物35を覆う/遮蔽する。
トップシート20は、任意の好適な親水性不織布ウェブ材料から形成され得る。再び図を参照すると、トップシート20は、吸収性層40の着用者に面する表面に隣接して位置付けられ、任意の好適な取り付け又は結合方法によって、そこに及びバックシート30に接合され得る。トップシート20及びバックシート30は、吸収性層40の外周部41の外側の周辺領域において互いに直接接合され得、吸収性層の着用者に面する表面及び外方に面する表面、又はパッドに含まれる追加の任意選択的な層に直接接合することによって間接的に接合され得る。
いくつかの実施例では、吸収性層40は、吸収性連続気泡発泡体材料の層から形成されてもよく、又はこれを含んでもよい。いくつかの実施例では、発泡体材料は、吸収性連続気泡発泡体材料の少なくとも第1及び第2の副層40a、40b(図2B)を含んでもよく、副層は、互いに直接向かい合わせに接触している。このような実施例では、以下でより詳細に説明する目的のために、着用者に面する副層は、相対的により大きな気泡発泡体材料であってもよく、外方に面する副層は、相対的により小さな気泡発泡体材料であってもよい。
水性流体の吸収性/親水性構造体の親和性及び吸収性は、部分的に、その毛管吸収圧によって特徴付けることができる。毛管吸収圧(capillary absorption pressure、CAP)は、以下に記載される毛管作用ポテンシャル測定方法の工程に従って測定することができる。これは、構造体が水性流体を引き込む傾向の大きさを反映する値である。吸収性構造体のCAP対飽和レベルのプロットは、(流体の吸収の最初に)初期最大値を有し、構造体が流体中に引き込まれ、その完全な吸収能力、すなわち、完全飽和に近づくにつれて減少することが理解されよう。
バックシート30は、吸収性層40の外方に面する表面に隣接して位置付けることができ、任意の好適な取り付け方法によってこの面に接合することができる。例えば、バックシート30は、均一な連続した接着剤層、パターン化された接着剤層、又は独立した接着剤の線、螺旋若しくは点の配列によって、吸収性層40に固定されてもよい。代替的に、取り付け方法は、熱結合、圧力結合、超音波結合、動的機械的結合、若しくは他の任意の好適な取り付け機構、又はこれらの組み合わせを含んでもよい。他の実施例では、吸収性層40が、バックシート30に直接接合されないことが企図される。
細孔容積分布を介した毛管作用ポテンシャル
細孔容積分布は、試料チャンバ内の試料に段階的な制御された差圧が適用される際の、当該試料の内外への流体移動を測定することによって、多孔質試料内の有効細孔の推定気孔率を決定する。次いで、各圧力で多孔質試料によって吸収/排出される流体の増分及び累積量を決定する。次に、当該試料の面積によって正規化された多孔質試料によって行われる作用は、毛管作用ポテンシャルとして計算される。
均一な円筒形細孔について、細孔の半径は、以下の方程式による、細孔を満たす又は空にするために必要とされる差圧に関連し:
差圧=[2γ cosθ)]/r
式中、γ=液体表面張力、θ=接触角、r=細孔半径である。
細孔容積分布方法は、23℃±2.0℃の温度かつ50%±2%の相対湿度で維持された室内で、少なくとも2時間調整された試料に対して実施され、全ての試験は、同じ環境条件下かつこのような調整された室内で実施される。しわ、裂け目、穴などの欠陥を有する損傷した製品又は試料は、試験されない。本明細書に記載のとおりに調整された試料は、本発明の目的上、乾燥したものと見なされる。試料のどの側が使用中に着用者に面することが意図されているかを判定し、次いで、それを長さ55mm×幅55mmに切断する。試料の質量を測定し、0.1mg単位で記録する。3つの試料が、任意の所与の被試験材料について測定され、これら3つの反復実験の結果が平均されて最終的な報告値を得る。
本方法に好適な装置は、「Liquid Porosimetry:New Methodology and Applications」by B.Miller and I.Tyomkin published in The Journal of Colloid and Interface Science(1994),volume 162,pages 163-170に説明されている。更に、0mmH2O~1098mmH2Oの差圧の試料チャンバ圧を制御することができる任意の圧力制御スキームが、この参照文献で説明される圧力制御サブシステムの代わりに使用されてもよい。好適な全体的な器具類及びソフトウェアの一例は、TRI/オートポロシメータ(Autoporosimeter)((Textile Research Institute、TRI)/Princeton Inc.(Princeton, NJ, USA))である。TRI/オートポロシメータは、多孔質材料の細孔容積分布(例えば、有効細孔半径5μm~1200μmの範囲内の異なるサイズの細孔容積)を測定するための自動コンピュータ制御器具である。Automated Instrument Software Releases 2000.1又は2003.1/2005.1若しくは2006.2、又はData Treatment Software Release 2000.1(TRI Princeton Inc.から入手可能)などのコンピュータプログラム、及びスプレッドシートプログラムが、測定されたデータを収集及び解析するために使用され得る。
漏れについてシステムをチェックし、以下のように最大試験圧力に確実に達するようにする。液体弁815を開けて、試料チャンバ810の頂部808を定位置に配置し、チャンバを封止する。(接続部814を介して)チャンバ810に十分な空気圧を加えて、1098mmH2O(5μmの有効細孔半径)の差圧を達成する。液体弁815を閉じた後、試料チャンバを開く。試料805を(着用者側を下に向けて)膜806上に直接配置し、次いで、カバープレート804及び拘束重り803を試料の上の中心に置く。頂部808を交換し、試料チャンバ810を再密閉する。液体弁815を開けて、液体リザーバ802と試料との間の流体の移動を可能にし、予め指定された差圧のシーケンスを通して試験を進行させる。シーケンス全体にわたって各圧力段階で試料によって吸収(又は排出)された流体の量は、0.1mg単位で取り込み量として記録される。
試験シーケンスの吸収及び排液部分の両方の各々の圧力段階における試料の%飽和は、ブランク補正試料取り込み量(mg)で最大ブランク補正試料取り込み量(mg)を割り、次いで100を乗じることによって計算することができる。シーケンス全体にわたって収集されたデータから、当業者は、次いで、任意の所与の毛管吸収圧(CAP)又は毛管脱着(排液)圧(CDP)における%飽和を決定することができる。CAP及びCDPは、任意の指定された%飽和について0.1mmH2O単位で報告される。
累積体積(mm3/mg)=ブランク補正試料取り込み量(mg)/流体密度(g/cm3)/試料の質量(mg)
不織布ウェブ材料の試験試料のキャリパ、又は厚さは、試料が載置される基準プラットフォームと、特定の時間にわたって試料上に特定の量の圧力を加える押さえとの間の距離として測定される。全ての測定は、23℃±2℃及び相対湿度50%±2%で維持された実験室で実施され、試験試料は、試験前に少なくとも2時間、この環境で調整される。
1. 女性用衛生パッドであって、液体透過性トップシートと、液体不透過性バックシートと、トップシートとバックシートとの間に配設された吸収性層と、を備え、
トップシートが、親水性繊維を含む繊維状不織布ウェブ材料を含み、
吸収性層が、HIPEの重合によって形成された連続気泡発泡体を含み、
トップシート及び吸収性層が、互いに直接向かい合わせの関係で配設され、少なくとも15cm2、より好ましくは少なくとも30cm2、更により好ましくは、吸収性層の着用者に面する表面の表面積の少なくとも半分の結合領域内で互いに取り付けられ、結合領域内で、トップシートと吸収性層との間の各第1の識別可能な取り付け点が、第1の識別可能な取り付け点の6mmの半径内で、トップシートと吸収性層との間の隣接する第2の識別可能な取り付け点を有する、女性用衛生パッド。
トップシートが、綿繊維を含みかつCWPDを有する繊維状不織布ウェブ材料を含み、
吸収性層が、CWPDよりも大きいCWPAを有し、1mm~5mm、又はより好ましくは1.5mm~3.5mm、又は更により好ましくは2.0mm~3.0mmのキャリパを(湿潤前に)有し、
トップシート及び吸収性層が、互いに直接向かい合わせの関係で配設され、少なくとも15cm2、より好ましくは少なくとも30cm2、更により好ましくは、吸収性層の着用者に面する表面の表面積の少なくとも半分の結合領域内で互いに取り付けられ、結合領域内で、トップシートと吸収性層との間の各第1の識別可能な取り付け点が、第1の識別可能な取り付け点の6mmの半径内で、トップシートと吸収性層との間の隣接する第2の識別可能な取り付け点を有する、女性用衛生パッド。
***
Claims (15)
- 女性用衛生パッドであって、液体透過性トップシートと、液体不透過性バックシートと、前記トップシートと前記バックシートとの間に配設された吸収性層と、を備え、
前記トップシートが、親水性繊維を含む繊維状不織布ウェブ材料を含み、
前記吸収性層が、HIPEの重合によって形成された連続気泡発泡体を含み、
前記トップシート及び前記吸収性層が、互いに直接向かい合わせの関係で配設され、少なくとも15cm2、より好ましくは少なくとも30cm2、更により好ましくは、前記吸収性層の着用者に面する表面の表面積の少なくとも半分の結合領域内で互いに取り付けられ、前記結合領域内で、前記トップシートと前記吸収性層との間の各第1の識別可能な取り付け点が、前記第1の識別可能な取り付け点の6mmの半径内で、前記トップシートと前記吸収性層との間の隣接する第2の識別可能な取り付け点を有する、女性用衛生パッド。 - 女性用衛生パッドであって、液体透過性トップシートと、液体不透過性バックシートと、前記トップシートと前記バックシートとの間に配設された吸収性層と、を備え、
前記トップシートが、綿繊維を含みかつCWPDを有する繊維状不織布ウェブ材料を含み、
前記吸収性層が、前記CWPDよりも大きいCWPAを有し、1mm~5mm、又はより好ましくは1.5mm~3.5mm、又は更により好ましくは2.0mm~3.0mmのキャリパを(湿潤前に)有し、
前記トップシート及び前記吸収性層が、互いに直接向かい合わせの関係で配設され、少なくとも15cm2、より好ましくは少なくとも30cm2、更により好ましくは、前記吸収性層の着用者に面する表面の表面積の少なくとも半分の結合領域内で互いに取り付けられ、前記結合領域内で、前記トップシートと前記吸収性層との間の各第1の識別可能な取り付け点が、前記第1の識別可能な取り付け点の6mmの半径内で、前記トップシートと前記吸収性層との間の隣接する第2の識別可能な取り付け点を有する、女性用衛生パッド。 - 前記トップシートと前記吸収性層との間の取り付けが、前記結合領域内に前記トップシートと前記吸収性層との間に散在した非結合領域を残しつつ、結合領域を形成するように不連続的又は断続的に堆積された接着剤によってもたらされる、請求項1又は2に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、植物繊維を含む、請求項1~3のいずれか一項に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、綿繊維を含む、請求項1~4のいずれか一項に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、レーヨン繊維を含む、請求項1~5のいずれか一項に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、主に植物繊維、好ましくは実質的に完全に植物繊維を含む、請求項4に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、主に綿繊維、好ましくは実質的に完全に綿繊維を含む、請求項5に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、主にレーヨン繊維、好ましくは実質的に完全にレーヨン繊維を含む、請求項6に記載の女性用衛生パッド。
- 前記不織布ウェブ材料がまた、熱可塑性ポリマー樹脂から紡糸された繊維を含む、請求項4~9のいずれか一項に記載の女性用衛生パッド。
- 前記不織布ウェブ材料が、水流交絡されている、請求項4~10のいずれか一項に記載の女性用衛生パッド。
- 前記吸収性層が、相対的により小さな気泡の外方に面する副層と接触して配設された、相対的により大きな気泡の着用者に面する副層を含む、少なくとも2つの吸収性副層を含む、請求項1~11のいずれか一項に記載の女性用衛生パッド。
- 前記繊維状不織布ウェブ材料が、CWPDを有し、前記吸収性層が、CWPAを有し、前記CWPAが前記CWPDよりも大きく、前記吸収性層が、1mm~5mm、又はより好ましくは1.5mm~3.5mm、又は更により好ましくは2.0mm~3.0mmのキャリパを(湿潤前に)有する、請求項1~12のいずれか一項に記載の女性用衛生パッド。
- 前記CWPAが、少なくとも40mJ/m2、より好ましくは少なくとも45mJ/m2、更により好ましくは少なくとも50mJ/m2だけ、前記CWPDよりも大きい、請求項13に記載の女性用衛生パッド。
- 前記繊維状不織布ウェブ材料が、20gsm~50gsm、より好ましくは25gsm~45gsm、更により好ましくは30gsm~40gsmの坪量を有する、請求項1~14のいずれか一項に記載の女性用衛生パッド。
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- 2020-02-12 CN CN202211493537.7A patent/CN115737285A/zh active Pending
- 2020-02-12 WO PCT/US2020/017826 patent/WO2020167882A1/en unknown
- 2020-02-12 CN CN202080008868.XA patent/CN113613606B/zh active Active
- 2020-02-13 US US16/789,516 patent/US11813149B2/en active Active
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EP3923881A1 (en) | 2021-12-22 |
US11813149B2 (en) | 2023-11-14 |
CN115737285A (zh) | 2023-03-07 |
WO2020167882A1 (en) | 2020-08-20 |
CN113613606A (zh) | 2021-11-05 |
US20200253793A1 (en) | 2020-08-13 |
CN113613606B (zh) | 2023-01-17 |
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