JP5615547B2 - 改良されたナノウェブ - Google Patents
改良されたナノウェブ Download PDFInfo
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- JP5615547B2 JP5615547B2 JP2009529230A JP2009529230A JP5615547B2 JP 5615547 B2 JP5615547 B2 JP 5615547B2 JP 2009529230 A JP2009529230 A JP 2009529230A JP 2009529230 A JP2009529230 A JP 2009529230A JP 5615547 B2 JP5615547 B2 JP 5615547B2
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- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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Description
PR={(W0−Wi)/W0}/{(Li−L0)/L0};
式中、W0は初期の試料幅であり、Wiは伸長された長さLiにおける試料幅であり、L0は初期の試料長さであり、L0の値はW0の値の4倍の最小値であり、Liは所与の伸長における試料長さである。
表面安定性指数(SSI)は、ウェブの表面における繊維が引っ張られた際に破断しない傾向の尺度である。ウェブの表面安定性指数を、以下の技術によって測定した。マグネチックバー(magnetic bar)を、伸び計(MTS QUEST(商標)5)の下方の取り付け点に設置した。約4インチ×6インチの鋼板を磁石の上部に置いた。鋼板の上に、幅約2.5インチおよび長さ約3インチの1枚の両面テープをしっかりと取り付けた。少なくとも2インチ×2インチの1枚の試験される材料を、両面テープの上に静かにただし滑らかに置いた。試験される材料の表面を乱さないように注意を払い;しわおよび折れ目が付かないようにした。
Nm=(Rセパレータ×A電極)/(ρ電解質×tセパレータ)
式中、Rセパレータは、セパレータの抵抗性(オーム)であり、A電極は、電極の面積(cm2)であり、ρ電解質は、電解質の抵抗性(オーム−cm)であり、tセパレータは、セパレータの厚さ(cm)である。25℃におけるメタノール電解質中のLiClの2M溶液の抵抗性は、50.5オーム−cmである。
比較例1は圧延されていないナノウェブ(図1)であった。それは、約7マイクロメートルの最大孔径および約3マイクロメートルの平均流孔径を有していた。
シートの巻取り速度は10フィート/分(3.05m/分)であり、硬質ロールの温度は80℃であった。ニップの圧力を12.64mmのニップフットプリントによって示した。シートを、ニップの出口で62.5g/cmの張力で圧延した後延伸した。処理されたナノウェブは、約2.6マイクロメートルの最大孔径および約1.0マイクロメートルの平均流孔径を有していた。
シートの巻取り速度は10フィート/分(3.05m/分)であり、硬質ロールの温度は50℃であった。ニップの圧力を12.64mmのニップフットプリントによって示した。シートを、ニップの出口で62.5g/cmの張力で圧延した後延伸した。処理されたナノウェブは、約2.7マイクロメートルの最大孔径および約1.1マイクロメートルの平均流孔径を有していた。
ニップの出口で198g/cmの張力で延伸した以外は、実施例2にしたがってナノウェブを作製し圧延した。処理されたナノウェブは、約2.3マイクロメートルの最大孔径および約0.9マイクロメートルの平均流孔径を有していた。
0.85μmの平均繊維直径を有する17gsmのメルトブローンウェブを、1200g/10分のメルトフロー速度(MFR)のポリプロピレン(Basell,Wilmington,DE)X11292−36−6から作製した。
0.94μmの平均繊維直径を有する17gsmのメルトブローンウェブを、ポリプロピレン(Basell,Wilmington,DE)PF017(2000MFR、過酸化物で被覆されている)から作製した。
表1は、実施例1〜3および比較例1から得られる結果を示す。表1のデータは、本発明の圧延方法を行ったナノウェブのポアソン比および耐ネッキング性が、比較例1の紡糸されたままのナノウェブと比較して大幅に改良されたことを示す。
以下に本発明の態様を示す。
1.ポリマーナノ繊維を含む不織ナノウェブであって、約0.8未満のポアソン比、少なくとも約20%の固体性、少なくとも約1gsmの坪量、および少なくとも約1μmの厚さを有する不織ナノウェブ。
2.別個の不連続の結合または非結合領域を任意に有し、面積の約15%未満が、溶融された領域を含む前記ウェブの平面内にあり、かつ接着結合されていない上記1に記載の不織ナノウェブ。
3.面積の約1%未満が、溶融された領域を含む前記ウェブの平面内にある上記2に記載の不織ナノウェブ。
4.約50gsm未満の坪量を有する上記1に記載の不織ナノウェブ。
5.前記ポアソン比が、前記ウェブの縦方向にかけられる引張り応力下で測定される上記1に記載の不織ナノウェブ。
6.圧延されたウェブである上記1に記載の不織ナノウェブ。
7.約0.1μm〜約15μmの最大孔径および約0.01μm〜約5μmの平均流孔径を有する上記1に記載の不織ナノウェブ。
8.メタノール電解質中の2M塩化リチウムの約2オーム−cm 2 以下の電気抵抗、および2〜15のマクマリン数を有する上記1に記載の不織ナノウェブ。
9.前記ウェブの縦方向に100g/cmの張力をかけた際に、横方向のネッキングが約20%未満である上記1に記載の不織ナノウェブ。
10.約17,513N/mより高い表面安定性指数を有する上記1に記載の不織ナノウェブ。
11.約0.9未満の摩擦係数を有する上記1に記載の不織ナノウェブ。
12.少なくとも約69MPaの縦方向引張り弾性率を有する上記1に記載の不織ナノウェブ。
13.少なくとも約4.1MPaの縦方向破断点引張り強さを有する上記1に記載の不織ナノウェブ。
14.第1のロールと第2のロールとの間のニップ間でポリマーナノウェブを圧延し、前記ウェブの厚さにわたって前記ウェブに圧力をかける工程であって、前記第1のロールおよび前記第2のロールの一方が硬質ロールであり、他方のロールが、ロックウェルb50未満の硬度を有する軟質ロールである工程と、前記ナノウェブポリマーのT g から前記ナノウェブポリマーのT om の間の温度に前記ウェブを加熱する工程とを含む方法によって形成される不織ナノウェブであって、前記圧延されたナノウェブは、面積の約15%未満が、溶融された領域を含む前記ウェブの平面内にある、不織ナノウェブ。
15.約0.8未満のポアソン比、少なくとも約20%の固体性、少なくとも約1gsmの坪量、および少なくとも約1μmの厚さを有する上記14に記載の不織ナノウェブ。
16.約0.1μm〜約15μmの最大孔径および約0.01μm〜約5μmの平均流孔径を有する上記14に記載の不織ナノウェブ。
17.少なくとも約69MPaの縦方向引張り弾性率、および少なくとも約4.1MPaの縦方向破断点引張り強さを有する上記14に記載の不織ナノウェブ。
18.ポリマーナノウェブの表面を安定化させるための方法であって、第1のロールと第2のロールとの間のニップに通して前記ナノウェブを圧延し、前記ウェブの厚さにわたって前記ウェブに圧力をかける工程であって、前記第1のロールおよび前記第2のロールの一方が硬質ロールであり、他方のロールが、ロックウェルB50未満の硬度を有する軟質ロールである工程と、前記ナノウェブポリマーのT g から前記ナノウェブポリマーのT om の間の温度に前記ウェブを加熱する工程とを含む方法。
19.前記硬質ロールが、前記ナノウェブ上に所定のパターンの結合領域を形成する隆起した領域を含む上記18に記載の方法。
20.前記硬質ロールが型押されていない上記18に記載の方法。
21.圧延の前または後のいずれかに、縦方向および/または横方向において前記温度で前記ナノウェブを延伸する工程をさらに含む上記18に記載の方法。
22.少なくとも約20%の固体性、少なくとも約1gsmの坪量、約1μm〜400μmの厚さおよび約15マイクロメートルの最大孔径を有する、ポリマーナノ繊維を含む不織ナノウェブであって、面積の約15%未満が、溶融された領域を含む前記ウェブの平面内にある不織ナノウェブ。
23.前記最大孔径が、約0.1マイクロメートル〜約15マイクロメートルであり、前記ウェブが、約0.01マイクロメートル〜約5マイクロメートルの平均流孔径を有する上記22に記載の不織ナノウェブ。
24.約1.1〜約6の最大孔径/平均流孔径の比率を有する上記23に記載の不織ナノウェブ。
25.約20%〜約80%の固体性を有する上記22に記載の不織ナノウェブ。
26.固体性が約20%〜約40%である上記25に記載の不織ナノウェブ。
27.少なくとも約20%の固体性、少なくとも約1gsmの坪量、約1μm〜400μmの厚さおよび少なくとも約4.1MPaの縦方向破断点引張り強さを有する、ポリマーナノ繊維を含む不織ナノウェブであって、面積の約15%未満が、溶融された領域を含む前記ウェブの平面内にある不織ナノウェブ。
28.少なくとも約69MPaの縦方向引張り弾性率を有する上記27に記載の不織ナノウェブ。
29.前記不織ウェブと対面する関係で接合された第2のウェブをさらに含み、前記第2のウェブが、1つ以上のナノウェブ、スクリム、およびこれらの任意の組合せを互いに積層したものからなる群から選択される上記1、14、22、または27のいずれか一項に記載の不織ナノウェブ。
30.上記1、14、22、または27のいずれか一項に記載の不織ナノウェブを含むろ過媒体。
31.上記1、14、22、または27のいずれか一項に記載の不織ナノウェブを含むエネルギー蓄積装置用セパレータ。
Claims (5)
- 第1のロールと第2のロールとの間のニップ間でポリマーナノウェブを圧延し、前記ウェブの厚さにわたって前記ウェブに圧力をかける工程であって、前記第1のロールおよび前記第2のロールの一方が硬質ロールであり、他方のロールが、ロックウェルb50未満の硬度を有する軟質ロールである工程と、前記ナノウェブポリマーのT g から前記ナノウェブポリマーのT om の間の温度に前記ウェブを加熱する工程とを含む方法によって形成される、15マイクロメートルの最大孔径を有し、ポリアミドからなるポリマーナノ繊維を含む不織ナノウェブであって、0.8未満のポアソン比、少なくとも20%の固体性、少なくとも1gsmの坪量、少なくとも1μmの厚さ、少なくとも138MPaの縦方向引張り弾性率、及び少なくとも6.9MPaの縦方向破断点引張り応力を有し、ナノウェブは2つの型押されていないロールの間のニップ間に供給されることにより圧延され、ナノウェブは、面積の15%未満が、溶融された領域を含む前記ウェブの平面内にある不織ナノウェブ。
- ポリマーナノウェブの表面を安定化させるための方法であって、第1のロールと第2のロールとの間のニップに通して前記ナノウェブを圧延し、前記ウェブの厚さにわたって前記ウェブに圧力をかける工程であって、前記第1のロールおよび前記第2のロールの一方が硬質ロールであり、他方のロールが、ロックウェルB50未満の硬度を有する軟質ロールである工程と、前記ナノウェブポリマーのTgから前記ナノウェブポリマーのTomの間の温度に前記ウェブを加熱する工程とを含み、ナノウェブが、少なくとも138MPaの縦方向引張り弾性率、及び少なくとも6.9MPaの縦方向破断点引張り応力を有する方法。
- 1μm〜400μmの厚さを有する、ポリマーナノ繊維を含む請求項1の不織ナノウェブ。
- 請求項1または3に記載の不織ナノウェブを含むろ過媒体。
- 請求項1または3に記載の不織ナノウェブを含むエネルギー蓄積装置用セパレータ。
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2006
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2007
- 2007-09-19 JP JP2009529230A patent/JP5615547B2/ja active Active
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- 2007-09-19 BR BRPI0715159-4A2A patent/BRPI0715159A2/pt not_active Application Discontinuation
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- 2007-09-19 EP EP07852413.9A patent/EP2064379B1/en active Active
- 2007-09-19 KR KR1020097005356A patent/KR101516436B1/ko active IP Right Grant
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CN101558194B (zh) | 2012-12-26 |
EP2064379B1 (en) | 2020-01-15 |
CN101558194A (zh) | 2009-10-14 |
BRPI0715159A2 (pt) | 2013-06-11 |
JP2010504444A (ja) | 2010-02-12 |
EP2064379A2 (en) | 2009-06-03 |
US20090261035A1 (en) | 2009-10-22 |
US8697587B2 (en) | 2014-04-15 |
KR20090068320A (ko) | 2009-06-26 |
US20080070463A1 (en) | 2008-03-20 |
KR101516436B1 (ko) | 2015-04-30 |
WO2008036332A3 (en) | 2008-06-12 |
WO2008036332A2 (en) | 2008-03-27 |
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