JP6998323B2 - 層間間隔の拡大により飛沫耐性を向上させた多層構造体及びそれから形成された物品 - Google Patents
層間間隔の拡大により飛沫耐性を向上させた多層構造体及びそれから形成された物品 Download PDFInfo
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Landscapes
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- Dispersion Chemistry (AREA)
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- Epidemiology (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Laminated Bodies (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
Description
本発明は、層間間隔の増大により耐飛沫性の向上させた多層構造体及びそれから形成された物品に関する。
前記第1の複数のチャネルは、前記流体が、前記第1の複数のチャネルを通る前記流体の接触点から横方向に向けられるような向きを有する。
さらに、前記機能性添加剤は、前記多層構造体のなかに存在する前記第1の複数の3次元スペーサの乾燥重量に基づいて約0.25重量%~約70重量%の範囲の量で存在し得る。
本発明の耐飛沫性多層構造体は、1つ以上の外側を向いた表面(すなわち、ユーザの皮膚を向いていない側の表面)または内側を向いた表面(すなわち、ユーザの皮膚を向いた側の表面)の上に配置された複数の3次元スペーサを含む。複数の3次元スペーサは、多層構造体を形成するために使用される材料の複数の層(そのような材料の複数の層については、以下でより詳細に論じる)のうちの1つに適用されるときに3次元スペーサを形成することができる、バインダ、インク、ポリマー、またはそれらの組み合わせ、または任意の他の成分を含む組成物から形成することができる。本発明において想定される3次元スペーサを形成するのに適合し得るバインダの具体例としては、弾性パフ(膨張性)印刷インキ、非弾性パフ(膨張性)印刷インキ、アクリルバインダ、ポリウレタンバインダー、熱可塑性材料(例えば、低温ポリオレフィンホットメルト接着剤またはのり;印刷インク、または任意の他の適切なバインダ、インク、接着剤、またはそれらの組み合わせ)等が挙げられる。そのようなバインダは、LubrizolまたはH.B.Fullerから入手することができる。さらに、バインダは水溶性であってもよい。必須ではないが、一実施形態では、バインダ、インク、接着剤などが疎水性であり得、この場合、その疎水性が流体の次の層への浸透を防止することにより飛沫耐性を高めることができる。
相変化材料である機能性添加剤、吸収性材料、または超吸収性材料を含有するマイクロカプセルの場合は、「粉砕」または「崩壊」は必要ないことを理解されたい。
上述の複数の3次元スペーサは、本発明によって想定される多層構造体の材料の1つ以上の層に適用することができる。例えば、多層構造体の層は、1つ以上の不織材料(例えば、スパンボンド(S)、メルトブローン(M)、SMSラミネート、スパンレース、水流交絡された、カード処理(梳綿)された、エラストマー、または発泡材ウェブ)、1つ以上のフィルム、またはそれらの任意の組合せを含み、3次元スペーサは、材料の複数の層のうちのいずれか1つに存在することができ、スペーサは、材料の外側を向いた表面、内側を向いた表面、またはその両方の表面上に存在し得る。多層構造体中の材料が疎水性である場合、ASTM F1862-13によって測定される飛沫耐性は、天然にまたは添加剤または処理剤の使用によって、さらに増強することができる。これにより、層を通って流体の付着物が浸透する可能性を低減することができる。さらに、3次元スペーサは、本発明の多層構造の材料層の2つ以上に存在することができる。さらに、多層構造を形成するために使用される材料の様々な層は、それぞれが、約10gsm~約150gsm(例えば、約12.5gsm~約100gsm、例えば約15gsm~約80gsm)の範囲の坪量を有することができる。例えば、任意のメルトブローン材料層が、約10gsm~約75gsm(例えば約12.5gsm~約70gsm、例えば約15gsm~約50gsm)の範囲の坪量を有することができる。さらに、任意のスパンレースまたは二成分不織材料層が、約10gsm~約25gsm(例えば約12.5gsm~約20gsm、例えば約15gsm~約17.5gsmなど)の範囲の坪量を有することができる。さらに、任意のスパンボンド材料層が、約15gsm~約60gsm(例えば約20gsm~約50gsm、または約20gsm~約45gsmなど)の範囲の坪量を有することができる。
様々な実施形態において、上述した3次元スペーサ及び層を配設して、飛沫耐性を改善し、フェイスマスク、外科用ドレープ、ブーファンキャップ、及び他のPPEに用いることができる多層構造体を形成することができ、この場合、複数の3次元スペーサによって容易に達成される層同士の強制的な分離により、追加の材料層を使用して飛沫耐性が高めた場合に生じるバルク、重量及び不快感の増加を生じることなく構造体の飛沫耐性を高められる。ここで、図5及び図6を参照すると、そのように流体付着物が多層構造体に入ったときの3次元スペーサの機能を示すために本発明の多層構造体の2つの層が示されている。
実施例1では、図9に示す構成に概ね対応するが3次元スペーサを有していない多層構造体(対照サンプル)と、図9に示すように構成された多層構造体(試験サンプル)とを、ASTM F2100-11で最も厳しいレベルのテストであるレベル3の性能を達成するそれらの能力について比較した。ASTM F2100-11のレベル3では、フェイスマスクが、ASTM F1862-13手順に従って160mmHgで2mlの人工血液(Moen&Co.,2505 Northridge Lane NE,Rochester,MN55906から入手)に対する耐浸透性を有することが求められる。換言すれば、対照サンプルは、3次元スペーサ302を除いて4層構造体860を含むものであった。対照サンプルの多層構造体は、0.5オンス/平方ヤード(16.95gsm)の坪量を有し、外側を向いた表面810を有するポリエステルパルプ湿潤材料から形成された材料の外層802を有していた。対照サンプル多層構造体860はまた、0.5オンス/平方ヤード(16.95gsm)の坪量を有し、内側を向いた表面812を有するバイコンポーネントカード処理された不織材料から形成された材料の内層808を有し、構造体が皮膚に隣接して着用されたフェイスマスクに使用された場合のように、材料の外層802が流体付着物に最も近くに配置され、材料の内層808が流体付着物から最も離れて配置されたように構成した。材料の外層802と材料の内層808との間に、2つの追加の層804及び806を設けた。材料の層806は、材料の外層802に隣接して配置され、0.600オンス/平方ヤード(20.34gsm)の坪量を有するメルトブローン材料から形成され、一方、材料の層804は、材料の内層808であり、0.9オンス/平方ヤード(30.52gsm)の坪量を有するスパンボンド材料から形成された。
Claims (14)
- 耐飛沫性の多層構造体であって、
外側を向いた表面と、内側を向いた表面とを有する材料の外層と、
外側を向いた表面と、内側を向いた表面とを有する材料の内層と、
前記材料の外層と前記材料の内層との間に配置された、スパンボンドウェブである追加の材料の層と、
前記材料の内層と前記追加の材料の層との間に配置された、メルトブローンウェブの層と、
前記多層構造体内の前記追加の材料の層の外側を向いた表面上に配置された第1の複数の3次元スペーサとを含み、
前記第1の複数の3次元スペーサは、前記材料の外層と前記追加の材料の層との間の空間を画定し、
前記空間は、前記第1の複数の3次元スペーサの最大高さと少なくとも同じ距離だけ延びており、前記第1の複数の3次元スペーサは、前記材料の外層に接触する流体に関連するエネルギーを吸収するのを助け、
第2の複数の3次元スペーサをさらに含み、
前記第2の複数の3次元スペーサは、前記材料の内層の前記内側を向いた表面に複数のドットの形態で分散配置され、アクリルバインダのなかに封入された相変化材料を含むことを特徴とする多層構造体。 - 耐飛沫性の多層構造体であって、
外側を向いた表面と、内側を向いた表面とを有する材料の外層と、
外側を向いた表面と、内側を向いた表面とを有する材料の内層と、
前記材料の内層と前記材料の外層との間に配置された、メルトブローンウェブの層と、
前記多層構造体内の前記材料の外層の内側を向いた表面上に配置された第1の複数の3次元スペーサとを含み、
前記第1の複数の3次元スペーサは、前記材料の外層と前記メルトブローンウェブの層との間の空間を画定し、
前記空間は、前記第1の複数の3次元スペーサの最大高さと少なくとも同じ距離だけ延びており、前記第1の複数の3次元スペーサは、前記材料の外層に接触する流体に関連するエネルギーを吸収するのを助け、
第2の複数の3次元スペーサをさらに含み、
前記第2の複数の3次元スペーサは、前記材料の内層の前記内側を向いた表面に複数のドットの形態で分散配置され、アクリルバインダのなかに封入された相変化材料を含むことを特徴とする多層構造体。 - 請求項1または2に記載の多層構造体であって、
前記第1の複数の3次元スペーサは、前記材料の外層に衝突する流体の流れを方向転換するための第1の複数のチャネルを画定し、
前記第1の複数のチャネルは、前記流体が、前記第1の複数のチャネルを通る前記流体の接触点から横方向に向けられるような向きを有することを特徴とする多層構造体。 - 請求項1~3のいずれか一項に記載の多層構造体であって、
前記第1の複数の3次元スペーサはパターンで配置されることを特徴とする多層構造体。 - 請求項4に記載の多層構造体であって、
前記パターンは連続的または不連続的であることを特徴とする多層構造体。 - 請求項5に記載の多層構造体であって、
前記パターンは複数のドットを含み、前記ドットは一連の列及び一連の行をなすように材料の層上に配置されることを特徴とする多層構造体。 - 請求項1~6のいずれか一項に記載の多層構造体であって、
前記第1の複数の3次元スペーサは、バインダ、インク、接着剤、またはそれらの組み合わせを含むことを特徴とする多層構造体。 - 請求項7に記載の多層構造体であって、
前記第1の複数の3次元スペーサは、アクリルバインダを含むことを特徴とする多層構造体。 - 請求項7に記載の多層構造体であって、
前記第1の複数の3次元スペーサは、インクを含み、前記インクは、弾性または非弾性の膨張可能なインクであることを特徴とする多層構造体。 - 請求項7に記載の多層構造体であって、
前記第1の複数の3次元スペーサは、バインダ、インク、接着剤、またはそれらの組み合わせのなかに含まれる封入された機能性添加剤をさらに含み、
前記機能性添加剤は、相変化材料、芳香剤、吸収性材料、超吸収性材料、抗菌剤、治療剤、局所軟膏、またはそれらの組み合わせを含むことを特徴とする多層構造体。 - 請求項10に記載の多層構造体であって、
前記機能性添加剤は、前記多層構造体のなかに存在する前記第1の複数の3次元スペーサの乾燥重量に基づいて約0.25重量%~約70重量%の範囲の量で存在することを特徴とする多層構造体。 - 請求項1~11のいずれか一項に記載の多層構造体であって、
前記第1の複数の3次元スペーサは疎水性のアクリルバインダを含むことを特徴とする多層構造体。 - 請求項1~12のいずれか一項に記載の多層構造体であって、
前記材料の外層及び前記材料の内層はそれぞれスパンボンドウェブを含むことを特徴とする多層構造体。 - 請求項1~13のいずれか一項に記載の多層構造体から形成される物品であって、
前記物品は、フェイスマスク、外科用ガウン、外科用ドレープ、外科用保護フード、またはブーファンキャップのいずれかであることを特徴とする物品。
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EP3445194A1 (en) | 2019-02-27 |
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BR112018071706A2 (pt) | 2019-02-19 |
US10744739B2 (en) | 2020-08-18 |
MX2018012597A (es) | 2019-02-21 |
JP2019515145A (ja) | 2019-06-06 |
WO2017184378A1 (en) | 2017-10-26 |
EP3445194B1 (en) | 2021-09-29 |
CA3021487A1 (en) | 2017-10-26 |
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