JP2010514953A - 寸法的に安定な結合した不織繊維ウェブ - Google Patents
寸法的に安定な結合した不織繊維ウェブ Download PDFInfo
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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
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Abstract
Description
下記の実施例の代表的な不織繊維ウェブ上で、さまざまな測定及び試験が行われた。示差走査熱量測定(DSC)は、調節されたDSC(商標)システム(デラウェア州ニューキャッスル(New Castle)のTAインストルメンツ(TA Instruments)社より提供されるQ1000モデル)を使用して行われた。かみそりの刃を用いて試験用ウェブから約2〜4ミリグラムの試験サンプルを切断し、下記の条件を用いて試験した。
透過配置形態で検証するサンプルを、個々の繊維束として調製した。繊維束は、不織ウェブから個々の繊維の群を取り除き、それらの繊維の長軸をそろえて繊維束を形成させることによって調製した。
本発明の不織メルトブロウンウェブを、ウェンテ、ヴァンA.(Van A. Wente)、「超微細熱可塑性繊維(Superfine Thermoplastic Fibers)」、生産工学化学(Industrial Engineering Chemistry)、48巻、1342頁以下(1956年)、又はウェンテ、ヴァンA.(Van A. Wente)、ブーン、C.D.(Boone, C. D.)、及びフルハーティー、E.L.(Fluharty, E. L.)、「超微細有機繊維の製造(Manufacture of Super Fine Organic Fibers)」、海軍研究試験所(Naval Research Laboratories)という題名の報告書番号4364(1954年5月25日出版)で教示されたのと同様の方法(ドリルダイが好ましくは使用されたという点を除いて)により調製した。ダイを通じて、加熱された空気の高速流の中に熱可塑性材料を押し出した。この高速流は、繊維の固化及び回収前に、繊維を引き伸ばして細化させる。繊維を無作為に有孔スクリーン上などに集めた。
実施例4は、米国特許第4,118,531号(ハウザー(Hauser)ら)に教示されている手順に従ってウェブの中に短繊維を添加する以外は、実施例1と同じであった。この短繊維は、配向ポリ(エチレンテレフタレート)(4.7デシテックス、長さ約5cm)のけん縮短繊維(コサ(Kosa)T224繊維、ジョージア州コビントン(Covington)のファイバービジョンズ社(Fiber Visions Incorporated))によるものであった。ウェブの組成は、実施例2の繊維密集体50%、短繊維50%であった。
装置のある部分と動作条件が表1に詳しく説明されている。表に報告されていない装置パラメータは、以下の通りである。図2のプレート104は、0.95センチメートル(3/8インチ)の間隔で、0.64センチメートル(1/4インチ直径)の孔を含有し、プレート面積の40%などを構成する。捕集器18は、1.27メートル(50インチ幅)、0.43mm×0.60mmの開口を有する山形模様の40メッシュステンレススチール網ベルト(stainless steel woven belt)(テネシー州ポートランド(Portland)のアルバニー・インターナショナル・エンジニア・ファブリックス(Albany International Engineered Fabrics)からの2055型)であった。
ウェブの収縮
ウェブの収縮は、当初のサンプル寸法からの寸法減少率として測定した。ASTM D 3776−96に従って調製したウェブの機械方向に印を付けて、ウェブのサンプルを1辺10cmの正方形のサンプル寸法にダイカットした。ASTM D 1204−84に従ってサンプルを試験した。サンプルをアルミニウムパンの中に置いた。アルミニウムパンは、サンプルがアルミニウムパンに貼りつくのを防ぐために、軽くタルク処理した。続いて、サンプルを対流式オーブン内に置き、オーブンを2時間、一定温度に保持した。ウェブをオーブンから取り出し、約22℃及び50%の相対湿度で24時間調湿した。ウェブを測定し、機械方向及び横断方向の双方のサンプル長で除した収縮値を得ることによって、収縮を計算した。その結果を表2に記す。ウェブのアニーリング処理は、収縮を有用なレベルまで低下させ、この場合のウェブは、その処理温度を上回る温度において安定的である。
^MD(機械方向)
ウェブの成形
実施例2及び4のウェブの成形性能は、従来の成形条件であるが、以下の表3に示される130℃の成形温度を用いて、典型的なサンプルをレスピレータ型のカップ形状に成形することによって調べられる。成形手順は、米国特許出願第11/461,192号(フォックス(Fox)ら)に記載されている。5秒の成形サイクルを用いて、実施例2の2層のサンプル、並びに、実施例4の2つのサンプル(4(#1)及び4(#2))を成形した。成形型を5秒間閉じ、成形型を開けたら、サンプルを室温の成形型の上に5秒間置いた。成形高さは5.7センチメートル(2.2インチ)であり、11.5センチメートル(4.5インチ)の短軸及び13センチメートル(5.1インチ)の長軸を有する、ほぼ楕円形状を形成した。成形部分の間には0.5センチメートル(0.2インチ)の間隔があった。成形されたカップの高さは、テーブル面にこれを固定し、成形されたカップの頂部に平刃を置き、テーブル面からナイフの刃までの距離を測定することによって測定される。100グラムのおもりを刃の上に置き、高さをもう一度測定した。成形温度及び高さの測定値が表3に報告されている。実施例2及び4のウェブは、130℃の温度で成形した場合でも、成形型の形どおりにうまく成形された。C1及びC2の成形物は、ウェブ収縮の結果、成形型から外すときに裂けた。本開示に記載されているアニーリング処理は、未処理ウェブとは異なり、成形可能であるウェブを提供する。
Claims (15)
- a)高分子材料を含むメルトブローン繊維を押出成形する工程と、
b)最初の不織繊維ウェブとして、前記メルトブローン繊維を集める工程と、
前記繊維は、歪み誘導結晶化を実質的に含まない、
c)制御された加熱及び冷却作業で、前記最初の不織繊維ウェブをアニーリングする工程と、
前記加熱及び冷却作業は、
i)ステップa)の高分子材料の低温結晶化温度(Tcc)超の温度を有する第1 の流体で、前記最初の不織繊維ウェブを加熱して、結合した不織繊維ウェブを提供 する前記メルトブローン繊維の非晶質領域の配向を低減することと、
ii)ステップa)の前記高分子材料のガラス転移温度(Tg)未満の温度を有す る第2の流体で、結合した不織繊維ウェブを冷却して、冷却された結合した不織繊 維ウェブを提供する前記メルトブローン繊維の前記非晶質領域を維持することと、
を含む、
d)寸法的に安定な結合した不織繊維ウェブを提供する前記冷却された結合した不織繊維ウェブを集める工程と、
を逐次的に含んでなる、結合した不織繊維ウェブを製造するための方法。 - 前記結合した不織繊維ウェブのメルトブローン繊維が、実質的に未配向である、請求項1に記載の方法。
- 前記最初の不織繊維ウェブ、前記結合した不織繊維ウェブ、前記冷却された結合した不織繊維ウェブ、及び寸法的に安定な結合した不織繊維ウェブが、拘束されていない、請求項1に記載の方法。
- 前記寸法的に安定な結合した不織繊維ウェブの収縮が、前記最初の不織繊維ウェブに比較して4パーセント未満である、請求項1に記載の方法。
- 前記メルトブローン繊維が、少なくとも一成分である、請求項1に記載の方法。
- 前記高分子材料が、ポリエステル、ポリアミド、環状ポリオレフィン、及びこれらの組み合わせからなる群から選択される、請求項1に記載の方法。
- 前記高分子材料が、ポリ(エチレンテレフタレート)を含む、請求項1に記載の方法。
- 前記高分子材料が、ポリ(乳酸)を含む、請求項1に記載の方法。
- 前記メルトブローン繊維の直径が、1マイクロメートル〜20マイクロメートルの範囲である、請求項1に記載の方法。
- 1マイクロメートル〜20マイクロメートルの範囲の直径を有するメルトブローン繊維を含む結合した不織繊維ウェブであって、前記繊維が、歪み誘導結晶化を実質的に含まない、結合した不織繊維ウェブ。
- 前記メルトブローン繊維が、実質的な低温結晶化発熱量を保有する、請求項10に記載の結合した不織繊維ウェブ。
- 前記ウェブが、80℃〜200℃の範囲の温度で、少なくとも2時間、寸法的に安定である、請求項10に記載の結合した不織繊維ウェブ。
- 請求項10に記載の前記結合した不織繊維ウェブを含む絶縁物品であって、そして更に短繊維を含む絶縁物品。
- 請求項10に記載の前記結合した不織繊維ウェブを含む成形物品。
- 請求項1に記載の方法によって調製された、寸法的に安定な結合した不織繊維ウェブ。
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US11/617,274 US8802002B2 (en) | 2006-12-28 | 2006-12-28 | Dimensionally stable bonded nonwoven fibrous webs |
PCT/US2007/087106 WO2008082872A1 (en) | 2006-12-28 | 2007-12-12 | Dimensionally stable bonded nonwoven fibrous webs |
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JP (1) | JP5175301B2 (ja) |
KR (1) | KR101432854B1 (ja) |
CN (1) | CN101622388B (ja) |
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JP2017519916A (ja) * | 2014-06-27 | 2017-07-20 | スリーエム イノベイティブ プロパティズ カンパニー | 多層繊維を含む熱安定性メルトブローンウェブ |
WO2019031286A1 (ja) * | 2017-08-10 | 2019-02-14 | 株式会社クラレ | メルトブローン不織布、それを用いた積層体、メルトブローン不織布の製造方法およびメルトブロー装置 |
JPWO2019031286A1 (ja) * | 2017-08-10 | 2020-09-17 | 株式会社クラレ | メルトブローン不織布、それを用いた積層体、メルトブローン不織布の製造方法およびメルトブロー装置 |
JP7129984B2 (ja) | 2017-08-10 | 2022-09-02 | 株式会社クラレ | メルトブローン不織布、それを用いた積層体、メルトブローン不織布の製造方法およびメルトブロー装置 |
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Also Published As
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EP2102401A1 (en) | 2009-09-23 |
PL2102401T3 (pl) | 2020-10-05 |
EP2102401B1 (en) | 2020-05-06 |
JP5175301B2 (ja) | 2013-04-03 |
US20140024279A1 (en) | 2014-01-23 |
KR20090118026A (ko) | 2009-11-17 |
BRPI0720613A2 (pt) | 2014-04-15 |
CN101622388A (zh) | 2010-01-06 |
WO2008082872A8 (en) | 2009-09-03 |
CN101622388B (zh) | 2011-06-22 |
US8802002B2 (en) | 2014-08-12 |
KR101432854B1 (ko) | 2014-08-26 |
EP2102401A4 (en) | 2011-12-07 |
WO2008082872A1 (en) | 2008-07-10 |
US20080160861A1 (en) | 2008-07-03 |
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