JP4336651B2 - 極めて高い液体バリア布 - Google Patents
極めて高い液体バリア布 Download PDFInfo
- Publication number
- JP4336651B2 JP4336651B2 JP2004538186A JP2004538186A JP4336651B2 JP 4336651 B2 JP4336651 B2 JP 4336651B2 JP 2004538186 A JP2004538186 A JP 2004538186A JP 2004538186 A JP2004538186 A JP 2004538186A JP 4336651 B2 JP4336651 B2 JP 4336651B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- barrier
- fiber
- nonwoven fabric
- web
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
- Y10T442/621—Including other strand or fiber material in a different layer not specified as having microdimensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
- Y10T442/626—Microfiber is synthetic polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
- Y10T442/66—Additional nonwoven fabric is a spun-bonded fabric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/68—Melt-blown nonwoven fabric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/681—Spun-bonded nonwoven fabric
Landscapes
- Engineering & Computer Science (AREA)
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- Dermatology (AREA)
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- Nonwoven Fabrics (AREA)
- Laminated Bodies (AREA)
Description
ランダム繊維ウェブ中の繊維間孔空間のサイズは、空間を占めることができる繊維の数の決定因子としての繊維直径Dfに比例する。それは、繊維によって占められるウェブ容量対総ウェブ容量の比である固形分体積分率c(すなわち、(1−空隙率))に反比例する。金属繊維フィルターについて、ゴーミン(Goeminne)ら(「金属繊維フィルターの幾何学的および濾過特性−比較研究(The Geometrical and Filtration Characteristics of Metal Fiber Filters−A Comparative Study)」、濾過および分離(Filtration and Separation)、11巻、No.4(1974)、350−355ページ)は、最大孔直径Dpが
デイビース(Davies)は、多種多様な繊維材料でできたパッドに関する流速、圧力損失、繊維サイズおよび固形分分率の注意深いおよびうまく証明された相関関係を提示した(デイビース、シー.エヌ.(Davies,C.N.)、「空気で運ばれるダストおよび粒子の分離(The Separation of Airborne Dust and Particles)」、機械エンジニア協会会報(The Institution of Mechanical Engineers Proceedings)(B)、No.1−12、第1B巻(1952−53)、185ページ)。上の定義の観点から、この相関関係は、単位流動面積A当たりの体積流量Qを
ここで、
モデル1:繊維サイズが液体バリアを増やすために減らされる時に一定の坪量
Bwt=33.9g/m2、fba=0、c=0.1、およびρf=920kg/m3であるポリプロピレン布の場合について、モデルは表1、および図3の結果を与える。
フラジール=10m3/m2−分、fba=0、c=0.1、およびρf=920kg/m3であるポリプロピレン布の場合について、モデルは表2、ならびに図4および5の結果を与える。
高い通気度もしくは高い液体バリアまたは両方の極端な場合、バリア層の機械的強度は達成されるバリアレベルに実用上の限界をもたらし得る。図6は、繊維バリア層に抗して前進する液体界面を示す。バリア層は、特徴的により大きな孔付きの大きな繊維の層によってサポートされた特徴的に小さな孔付きの小さな繊維の層よりなる。バリア層の小さな孔を通して非濡れ性流体を押し進めるために必要とされる圧力は、式5で与えられる。この圧力による力は、バリア層の小さな繊維すべての端から端まで分配される。従って、代表的な小さな繊維、例えば、繊維ABのローディングは単位長さ当たりの力として容易に得られる。その一面に小さな繊維が圧負荷を伝えなければならない全長は、式4で与えられるようにサポート層の孔径によって決定される。全長が余りにも大きい場合には、小さな繊維中の張力は繊維の強度を超えることができ、それらの破壊をもたらす。
直径DfS=0.6マイクロメートル(フラジール=10m3/m2−分、c=0.1、GPD=デニール当たり1グラム、およびBwt=1g/m2)のポリプロピレン(ρf=920kg/m3)繊維よりなるモデル2のバリア層が直径DfL=12マイクロメートルの繊維と共にサポート層に積層される場合、式16は
3つの対照例は、スパンボンド層が18g/m2ポリエステル(ポリエチレンテレフタレート)であり、メルトブローン層が参照により本明細書に援用される国際公開第01/09425A1号パンフレットの記載に従って製造した18g/m2二成分65重量%ポリエステル/35重量%ポリエチレン繊維である、スパンボンド/メルトブローン/スパンボンド構造でできていた。対照布は、何の微細繊維層も付着しないことを除いては、典型布と同じ方法で製造した。
クレイトンTMD1133xコポリマーを9重量%のポリマー濃度で88重量%テトラヒドロフラン/12重量%ジメチルアセトアミドの混合溶媒に熔解し、−18KVで0.5ml/時の速度で電子紡糸した。微細繊維を、対照例で記載した18g/m2二成分メルトブローン布の試料上へおおよそ22cmの収集距離で付着した。次に微細繊維層を、試料ターゲットから取り除いたスパンボンド・ポリエステルの層でカバーした。メルトブローン収集布の層もまたスパンボンド・ポリエステルの層でカバーし、すべての4層を統合して積層品にした。実施例のバリア性を測定し、下の表4に報告する。
カイナーTMポリマーを15重量%のポリマー濃度でアセトン溶媒に熔解し、−20KVで5ml/時の速度で電子紡糸した。微細繊維を、対照例で記載した18g/m2二成分メルトブローン布の試料上へおおよそ22〜30cmの収集距離で付着した。次に微細繊維層を、試料ターゲットから取り除いたスパンボンド・ポリエステルの層でカバーした。メルトブローン収集布の層もまたスパンボンド・ポリエステルの層でカバーし、すべての4層を統合して積層品にした。実施例のバリア性を測定し、下の表5に報告する。
Claims (19)
- 少なくとも1つのサポートウェブと、1.0マイクロメートル未満の直径、少なくとも145cmの水頭および少なくとも0.3m3/m2−分のフラジール通気度を有する繊維の疎水性バリアウェブとを含んでなる不織布。
- 前記バリアウェブ繊維が0.5マイクロメートル未満の直径を有する請求項1に記載の不織布。
- 前記バリアウェブが疎水性ポリマーまたはコポリマーのナノファイバーを含んでなる請求項1に記載の不織布。
- 前記疎水性ポリマーまたはコポリマーがポリオレフィン、部分フッ素化ポリマーまたはパーフッ素化ポリマーである請求項3に記載の不織布。
- 前記疎水性ポリマーまたはコポリマーがエチレン、プロピレン、ブテン、ヘキセン、オクテン、スチレン、4−メチルペンテン−1およびそれらの組合せから誘導された繰り返し単位を有する請求項4に記載の不織布。
- 前記バリアウェブが疎水性コーティングでコーティングすることによって疎水性にされる請求項1に記載の不織布。
- 前記疎水性コーティングがフルオロカーボンコーティング材料である請求項6に記載の不織布。
- バリアウェブが23マイクロメートル以下の繊維間最大孔径を有する請求項1に記載の不織布。
- バリアウェブが0.03以上の固形分分率を有する請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、微細繊維バリア層(FF)/マイクロデニール・スパンボンド層(mSB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、微細繊維バリア層(FF)/スパンボンドサポート層(SB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、マイクロデニール・スパンボンド層(mSB)/微細繊維バリア層(FF)/マイクロデニール・スパンボンド層(mSB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、微細繊維バリア層(FF)/メルトブローン繊維層(MB)/スパンボンドサポート層(SB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、スパンボンドサポート層(SB)/メルトブローン繊維層(MB)/微細繊維バリア層(FF)/メルトブローン繊維層(MB)/スパンボンドサポート層(SB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、微細繊維バリア層(FF)/メルトブローン繊維層(MB)/マイクロデニール・スパンボンド層(mSB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、マイクロデニール・スパンボンド層(mSB)/メルトブローン繊維層(MB)/微細繊維バリア層(FF)/メルトブローン繊維層(MB)/マイクロデニール・スパンボンド層(mSB)の構造を含んでなる請求項1に記載の不織布。
- 微細繊維バリア層(FF)がバリアウェブである、スパンボンドサポート層(SB)/メルトブローン繊維層(MB)/微細繊維バリア層(FF)/スパンボンドサポート層(SB)の構造を含んでなる請求項1に記載の不織布。
- 前記サポートウェブがバリアウェブ繊維直径の20倍未満の直径を有する繊維を含んでなる請求項1に記載の不織布。
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US41142202P | 2002-09-17 | 2002-09-17 | |
PCT/US2003/029407 WO2004027140A1 (en) | 2002-09-17 | 2003-09-17 | Extremely high liquid barrier fabrics |
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EP (1) | EP1540062B1 (ja) |
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CN (1) | CN1681988B (ja) |
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- 2003-09-17 CA CA2499065A patent/CA2499065C/en not_active Expired - Lifetime
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- 2003-09-17 DE DE60329922T patent/DE60329922D1/de not_active Expired - Lifetime
- 2003-09-17 WO PCT/US2003/029407 patent/WO2004027140A1/en active Application Filing
- 2003-09-17 AU AU2003272542A patent/AU2003272542A1/en not_active Abandoned
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WO2004027140A1 (en) | 2004-04-01 |
US8658548B2 (en) | 2014-02-25 |
CN1681988A (zh) | 2005-10-12 |
JP2005539157A (ja) | 2005-12-22 |
KR101049667B1 (ko) | 2011-07-14 |
EP1540062B1 (en) | 2009-11-04 |
US20090298373A1 (en) | 2009-12-03 |
ES2333315T3 (es) | 2010-02-19 |
EP1540062A1 (en) | 2005-06-15 |
US20110177741A1 (en) | 2011-07-21 |
KR20050057330A (ko) | 2005-06-16 |
CA2499065A1 (en) | 2004-04-01 |
CN1681988B (zh) | 2010-08-11 |
CA2499065C (en) | 2011-05-17 |
AU2003272542A1 (en) | 2004-04-08 |
DE60329922D1 (de) | 2009-12-17 |
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