JP2010538813A - 改良されたプリーツ付きナノウェブ構造体 - Google Patents
改良されたプリーツ付きナノウェブ構造体 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
- B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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Abstract
Description
坪量(BW)はASTM D−3776(本明細書に援用する)で測定した。これはg/m2(gsm)で報告してある。
すべての実施例で、ポリマーのギ酸溶液を、WIPO公開の国際公開第03/080905号パンフレットに記載されているようにして電気ブロー加工で紡糸した。特に記載のない限り、24重量%のポリマーのギ酸溶液を電気ブロー加工に用いた。使用したポリマーは、ポリアミド−6,6(PA66)(Zytel 3218,Du Pont(Wilmington,DE))であった。特に記載のない限り、ウェブを横たえた後、ウェブは熱風中、80℃で乾燥させた。紡糸口金に加えた電圧は85kVであった。更なる工程の条件は具体例に記載されている。
ウェブには、ブレード式プリーツ加工機(blade pleating machine)または回転式プリーツ加工機のいずれかを用いてプリーツを付けた。プリーツ加工機は典型的には、温度および圧力下においてプリーツを安定化させるための加熱ゾーンを含む。具体的な工程条件は、実施例に記載されている。
ナノウェブ構造体は、電気ブロー加工法を用いて調製し、真空下で75gsmのスパンボンデッドのポリエステルスクリム(Kolon)上に回収した。坪量が0.9gsmのナノウェブが製造された。
比較例1では、スクリム−メルトブローン−スクリム(SMS)構成のメルトブローン媒体を使用した。メルトブローン繊維は、平均繊維直径が7ミクロンであり、層の厚さは0.44mmであった。上流のスクリム層は110gsmのスパンボンデッドのポリエステルスクリムであり、下流のスクリム層はスパンボンデッドのポリプロピレンスクリムであった。媒体の全厚さは0.80mmであった。フラットシート抵抗は、5.3cm/sの気流速度で測定した場合に0.7mmW.G.であった。媒体にプリーツを付け、実施例1に記載したのと同じ構成のフィルターに組み込み、しかるべく試験した。フィルターの抵抗は、170m3/時の流量で37Paであった。
実施例2および3のウェブ構造体は、実施例1に記載したのと同様の手順に従って調製した。ポリマー押出量およびライン速度(line speed)を調節して、ウェブの細繊維のサイズおよび坪量を変えた。どちらの実施例においても、2種類のスクリム−ナノ繊維(SN)ウェブ構造体を作製した。第1ウェブではスクリムは75gsmのスパンボンデッドのポリエステル(Kolon)であり、第2ウェブでは30gsmのスパンボンデッドのポリエステル(Kolon)である。この2種類のウェブ構造体を超音波接着してSN−NS構成の複合層にした。実施例2および3の詳細な特性の要約を表1に示す。
ナノウェブ構造体は電気ブロー加工法を用いて調製し、65gsmの乾式の樹脂接着(resin−bonded)ポリエステルスクリム(Ok Soo)上に回収した。製造されたナノウェブの坪量は3.8gsmであった。
比較の目的で、従来のメルトブローン媒体を使用した。メルトブローン繊維は、平均繊維直径が約3ミクロンであった。メルトブローン層の厚さは0.32mm(320ミクロン)であり、媒体の全厚さは0.78mmであった。フラットシート抵抗は、5.3cm/sの気流速度で測定した場合に2.7mmW.G.であった。
本発明のフィルターの有効性に関する更なる実施例として、実施例4に記載した手順に従って実施例5を調製した。異なっていたのは以下の点だけである:試料を100gsmの乾式樹脂接着ポリエステルスクリム(Ok Soo(Korea))上に回収したこと、および製造されたナノウェブの坪量が4.5gsmであったことである。組み立てられたHVAC V形バンクフィルターの濾過性能を、前の部分で述べたKClエアロゾル状態調整ステップを用いて、帯電媒体で作られた市販のフィルターと比較した。試験した市販の試料は、メルトブローン媒体で作られた堅いセルボックスフィルター(cell box filter)(Purolator Model DC95−4412K)とHVAC V形バンクフィルター(Viledon MV95フィルター)であった。
Claims (6)
- ナノウェブ層とスクリムとを含むプリーツ付き構造体を有する濾過媒体を含むフィルターであって、前記ナノウェブ層は、数平均直径が1ミクロン未満の繊維を含んでおりかつ層の厚さが50ミクロン未満であり、プリーツ間隔に対する媒体の全厚さの比率が0.15未満であり、前記ナノウェブ層は坪量が約0.6gsmを超えており、さらに前記スクリムが、スパンボンド繊維、乾式繊維、湿式繊維、セルロース繊維、メルトブローン繊維、ガラス繊維、およびそれらのブレンドよりなる群から選択される繊維から作られた不織布である、フィルター。
- 前記プリーツ間隔に対する媒体の全厚さの比率が0.12未満である、請求項1に記載のフィルター。
- 前記プリーツ間隔に対する媒体の全厚さの比率が0.08未満である、請求項1に記載のフィルター。
- 前記スクリムが前記ナノウェブ層に接着されている、請求項1に記載のフィルター。
- フラットシート抵抗を5.3cm/sの空気流量で測定してmm水位計の単位で記録し、フィルター抵抗を3344m3/時の空気流量で測定してインチ水位計の単位で記録してパスカル単位に変換した場合、前記媒体の前記フラットシート抵抗に対するフィルター抵抗の比率が約35Pa/mm未満である、請求項1に記載のフィルター。
- 3344m3/時の空気流量で3.6×105〜3.8×105個(粒子)/cm3の密度の0.02ミクロンの塩化カリウムエアロゾルを送り込んでも、前記フィルター効率が20時間の処理の間低下しない、請求項1に記載のフィルター媒体。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/899,803 | 2007-09-07 | ||
US11/899,803 US8679217B2 (en) | 2007-09-07 | 2007-09-07 | Pleated nanoweb structures |
PCT/US2008/075571 WO2009033143A1 (en) | 2007-09-07 | 2008-09-08 | Improved pleated nanoweb structures |
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JP2010538813A true JP2010538813A (ja) | 2010-12-16 |
JP2010538813A5 JP2010538813A5 (ja) | 2011-10-27 |
JP5539877B2 JP5539877B2 (ja) | 2014-07-02 |
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JP2010524222A Active JP5539877B2 (ja) | 2007-09-07 | 2008-09-08 | 改良されたプリーツ付きナノウェブ構造体 |
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US (1) | US8679217B2 (ja) |
EP (1) | EP2188031A1 (ja) |
JP (1) | JP5539877B2 (ja) |
KR (1) | KR101543481B1 (ja) |
CN (1) | CN101795746B (ja) |
BR (1) | BRPI0815527A2 (ja) |
WO (1) | WO2009033143A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013505122A (ja) * | 2009-09-16 | 2013-02-14 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 塵集積容量が向上しかつ高湿度環境に対する抵抗性が向上した空気濾過媒体 |
JP2016215098A (ja) * | 2015-05-18 | 2016-12-22 | 東洋紡株式会社 | プリーツフィルターエレメント |
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US6743273B2 (en) | 2000-09-05 | 2004-06-01 | Donaldson Company, Inc. | Polymer, polymer microfiber, polymer nanofiber and applications including filter structures |
JP4783248B2 (ja) * | 2006-09-12 | 2011-09-28 | 東芝ストレージデバイス株式会社 | 外乱抑圧機能を持つ位置制御方法、位置制御装置および媒体記憶装置 |
ES2932986T3 (es) | 2009-03-19 | 2023-01-30 | Emd Millipore Corp | Eliminación de microorganismos de muestras líquidas mediante el uso de medios de nanofibra para la filtración |
JP5671004B2 (ja) | 2009-04-13 | 2015-02-18 | インテグリス・インコーポレーテッド | 多孔性複合膜 |
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Also Published As
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EP2188031A1 (en) | 2010-05-26 |
KR20100065181A (ko) | 2010-06-15 |
JP5539877B2 (ja) | 2014-07-02 |
WO2009033143A1 (en) | 2009-03-12 |
US20090064648A1 (en) | 2009-03-12 |
CN101795746B (zh) | 2013-07-17 |
BRPI0815527A2 (pt) | 2015-02-03 |
CN101795746A (zh) | 2010-08-04 |
KR101543481B1 (ko) | 2015-08-10 |
US8679217B2 (en) | 2014-03-25 |
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