JP2010285735A - 透液性繊維不織布 - Google Patents
透液性繊維不織布 Download PDFInfo
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- JP2010285735A JP2010285735A JP2010095411A JP2010095411A JP2010285735A JP 2010285735 A JP2010285735 A JP 2010285735A JP 2010095411 A JP2010095411 A JP 2010095411A JP 2010095411 A JP2010095411 A JP 2010095411A JP 2010285735 A JP2010285735 A JP 2010285735A
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- Prior art keywords
- nonwoven fabric
- ridges
- fiber
- liquid
- staple fibers
- 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.)
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- 239000004744 fabric Substances 0.000 title abstract 4
- 239000000835 fiber Substances 0.000 claims abstract description 173
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- 210000001124 body fluid Anatomy 0.000 abstract description 23
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- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 2
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- -1 polyethylene Polymers 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- WLDHEUZGFKACJH-ZRUFZDNISA-K Amaranth Chemical compound [Na+].[Na+].[Na+].C12=CC=C(S([O-])(=O)=O)C=C2C=C(S([O-])(=O)=O)C(O)=C1\N=N\C1=CC=C(S([O-])(=O)=O)C2=CC=CC=C12 WLDHEUZGFKACJH-ZRUFZDNISA-K 0.000 description 1
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- 206010021639 Incontinence Diseases 0.000 description 1
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- 239000006096 absorbing agent Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
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- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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Abstract
【解決手段】熱可塑性合成樹脂で形成されたステープル繊維2が互いに溶着した状態にある透液性繊維不織布1の表面3には、縦方向Aへ互いに平行して延びる凸条部6と凹条部7とが横方向Bへ交互に並ぶ。繊維不織布1の裏面4から凸条部6の頂部11までの高さTに対して裏面4から凹条部7の底部12までの高さtが40〜55%の範囲にある。表面3には、凸条部6を介して隣り合う凹条部7どうしの間に延びるステープル繊維2であって、凹条部7のそれぞれにおいてそのステープル繊維2とは異なるステープル繊維2に溶着しているものが含まれる。
【選択図】図1
Description
図6の(a),(b)は、厚さを測定する方法の手順を説明するために使用する、繊維不織布片の交差方向CDにおける断面写真であり、その手順は次のとおりである。
1.コクヨカッターナイフ HA−7NB(商品名)用の標準替え刃 HA−100Bを使用して、厚さ測定用の繊維不織布片を交差方向CDに平行に裁断し、その繊維不織布片に交差方向CDに平行する観測用切断面を作る。その後に、その繊維不織布片の表面を水平面Hの上に載せ、キーエンスデジタルマイクロスコープVHX−100を用いて観測用断面の25倍の写真(図6(a)参照)を得る。
2.断面写真を画像処理ソフトであるスカラ(株)製画像解析ソフトUSBデジタルで処理して、画像を二値化する。そのときに、閾値=50に設定する。二値化した画像について二値画像形状解析の演算方法「穴埋め」を選択し、次に対象色「白」を選択して処理する。さらに二値画像形状解析の演算方法「穴埋め」を選択し、次に対象色「黒」を選択して処理する。処理の終わった画像では、ステープル繊維の集団である白島部からその外へ飛び出して毛羽状を呈しているステープル繊維を消して、毛羽立ちのないCD断面の修正写真(図6(b)参照)を得る。
3.修正写真において、隣り合う凸条部の頂点どうしを結ぶ直線Sと凹条部の底部に接して水平面Hに平行する水平線Rとを求める。
4.水平面Hに直交して、凹条部の底部を通り、直線Sと交わる垂線Qを求める。
5.垂線Qについて、水平面Hから直線Sとの交点までの距離を求めて、その距離を隣り合う凸条部それぞれの高さ(厚さ)Tとする。また、垂線Qについて、水平面Hから水平線Rとの交点までの距離を求めて、その距離を凹条部の厚さtとする(図6(b)参照)。
滞留面積を測定するための手順は、次のとおりである。
1.測定用試験片として5cm×5cmの繊維不織布片を用意する。
2.アドバンテック東洋(株)社製の粘ちょう液用濾紙 No.60を10cm×10cmに裁断した濾紙片を20枚重ね、その上に試験片を重ねる。
3.10ccのピペット((株)ニチリョー製リキッドハンドリング用デジタルマイクロピペット NPX−10ML)を使用し、体液として下記組成の人工経血2ccを試験片に対して静かに滴下する。
人工経血の組成
(1)イオン交換水:1リットル
(2)グリセリン:80g
(3)カルボキシメチルセルロースナトリウム:8g
(4)塩化ナトリウム:10g
(5)炭酸水素ナトリウム:4g
(6)赤色102号:8g
(7)赤色2号:2g
(8)黄色5号:2g
4.人工経血の滴下後20秒経過してから試験片を濾紙片から外し、風乾する。
5.試験片における人工経血が乾燥状態になった後に、デジタルスキャナ(セイコーエプソン社製イメージスキャナ GT8700)で、試験片に残る人工経血の状態をスキャンして人工経血の画像を得る。(スキャン条件は、色条件をTrue color−24ビットにセットし、ピクセルの大きさを59ピクセル/センチにセットする)(図7参照)。
6.5項で得られた画像を、画像処理ソフトであるスカラ(株)製 画像解析ソフト USBデジタルで処理して、画像を二値化する。赤色の人工経血によって赤色に染まったピクセルの数をデータ化して面積に換算する。
7.6項における二値化条件は、次のとおりとする:閾値=160、抽出ピクセル=3ピクセル以上、抽出範囲=400ピクセル×400ピクセル。
8.t/Tの値が同じである3枚の試験片についてピクセルの数(画素数)と換算した面積とを求め、その面積の平均値を「体液滞留面積(mm2)」とする(図7参照)。
摩擦強度を評価するための手順は、次のとおりである。
1.下記事項を除き、JIS L 0844:2004「摩擦に対する染色堅ろう度試験方法」の規定に従って評価する。
2.試験機には、下記の摩擦試験機II型(学振型)を使用する:
テスター産業(株)製 学振型摩擦堅牢度試験機 AB−301
3.摩擦時荷重:2N(200gf)
4.摩擦子表面:綿かなきん3号(JIS L 0803準拠品)
5.摩擦往復回数:20往復/分で1分間
6.試験片:繊維不織布における縦方向(機械方向)の寸法が220mm、横方向(交差方向)の寸法が30mmのものを試験片とし、試験片のうちで凸条部が形成されている表面を上に向け、摩擦子が縦方向において往復運動するように試験機にセットする。
7.摩擦後における繊維不織布の表面を観察して、下記の如くランク付けする。ランクA,B,Cにあるものが表面シートとして使用可能なものである。
A: 毛羽立ちが全くない
B: 毛羽立ちが殆どない
C: 毛羽立ちのある凸条部と毛羽立ちのない凸条部とが存在する
D: 毛羽立ちが多く、隣り合う凸条部どうしをつなぐ毛羽が存在する
1.実施例の繊維不織布を得るためのステープル繊維として、芯成分がポリエステル樹脂で、鞘成分がポリエチレン樹脂である第1および第2複合ステープル複合繊維を混合した。第1複合ステープル繊維は、繊度が2.2dtexであり、繊維長が45mmであって、ステープル繊維全体に占める平方メートル当たりの質量は80重量%であった。第2複合ステープル繊維は、繊度が2.6dtexであり、繊維長が38mmであって、ステープル繊維全体に占める平方メートル当たりの質量は20重量%であった。混合した第1および第2ステープル繊維をローラーカード機で処理して質量が15g/m2、25g/m2、35g/m2、40g/m2のウエブを得た。
2.これらのウエブを図2の工程において処理した。図2の工程IIにおける第1、第2、第3ノズル集合体の条件を下記のとおりに設定した。
(第1、第2ノズル集合体)
ノズルマニホールドにおける空気温度:200℃
ウエブの単位面積当たりの加熱空気噴射量:8.16Nl/m2
(第3ノズル集合体)
ノズルマニホールドにおける空気温度:350℃
ウエブの単位面積当たりの加熱空気噴射量:
10.92〜19.17Nl/m2
なお、各ノズル集合体における単体ノズルは、ピッチを4mmにセットし、ノズル集合体どうしの間では単体ノズルどうしが機械方向で列を作るようにセットした。また、サクションドラムの周面における透孔の開孔率は22.16%にセットした。
3.工程IIを通過したウエブは、工程IIIに送り、工程IIIでは温度135℃の加熱空気に5秒間接触させて、ステープル繊維どうしを互いに溶着させ、その後にウエブを室温にまで冷却して、実施例1〜10の繊維不織布を得た。
実施例1〜10における繊維不織布の評価結果は、表1〜3に記載のとおりである。表1〜3および後記の表4における凸条部と凹条部との比容積は、下記の手順(1),(2)によって求めた値である。
(1)10cm×10cmの繊維不織布片10枚についての平均質量から平方メートル当たりの質量を次式によって求める。ただし、この発明において、この繊維不織布片よりも小さな繊維不織布片を使用して質量を求めることも可能である。
質量(g/m2)=(平均質量(g))÷0.01
(2)比容積を求める繊維不織布片について、凸条部の頂部における厚さTと凹条部の底部における厚さtを測定し、次式によって比容積を求める。
凸条部または凹条部の比容積(cc/g)={(凸条部の厚さTまたは凹条部の厚さt)×1000}÷質量(g/m2)
図2における第3ノズル集合体の加熱空気噴射量を8.17〜24.58Nl/m2に設定した以外は、実施例と同じ条件を採用して、比較例1〜18の繊維不織布を製造して、実施例と同様に評価した。評価の結果は表1〜4に記載のとおりである。
(1)質量が15〜35g/m2であるときに、厚さの比t/Tが40〜60%の範囲にあると、繊維不織布における体液の滞留面積が比較的小さい。すなわち、体液として使用した粘ちょうな人工経血は、実施例の繊維不織布において広く拡散することがなく、繊維不織布を透過して、吸収体の代替物として使用された濾紙への移行が速やかである。
(2)t/Tが60%を超える比較例の繊維不織布は、摩擦に対する抵抗力が低く、毛羽立ち易い。t/Tが60%以下である繊維不織布は、毛羽立ちにくい傾向にある。
(3)繊維不織布の比容積で見ると、凸条部の比容積が70〜105cc/gの範囲にあって、凹条部の比容積が40〜60cc/gの範囲にある実施例の繊維不織布は、粘ちょうな体液を滞留させることがなく、また摩擦によって簡単に毛羽立つということもない。
2 ステープル繊維
3 表面
4 裏面
6 凸条部
7 凹条部
11 頂部
12 底部
A 縦方向
B 横方向
C 厚さ方向
P ピッチ
T 頂部の厚さ
t 底部の厚さ
Claims (6)
- 互いに直交する縦方向と横方向と厚さ方向とを有し、前記厚さ方向には前記縦方向と前記横方向とに広がる表面とその反対面である裏面とが形成され、前記表面には前記縦方向へ互いに平行して延びる凸条部と凹条部とが前記横方向へ交互に並んでいて、前記裏面が実質的に平坦に形成されており、熱可塑性合成樹脂で形成されたステープル繊維が互いに溶着した状態にある透液性繊維不織布であって、
前記裏面から前記凸条部の頂部までの厚さTに対して前記裏面から前記凹条部の底部までの厚さtが40〜60%の範囲にあり、前記ステープル繊維には前記凸条部をまたいで前記凸条部の両側に隣接する前記凹条部のそれぞれに届くものが使用されている、ことを特徴とする前記透液性繊維不織布。 - 前記凸条部をまたいだ前記ステープル繊維が、前記隣接する凹条部のそれぞれにおいて、該ステープル繊維とは異なるステープル繊維に溶着している請求項1記載の透液性繊維不織布。
- 質量が15〜35g/m2の範囲にある請求項1または2記載の透液性繊維不織布。
- 前記凸条部の比容積が70〜105cc/gの範囲にあり、前記凹条部の比容積が40〜60cc/gの範囲にある請求項1〜3のいずれかに記載の透液性繊維不織布。
- 前記ステープル繊維には、見かけの繊維長が10〜80mmであるものが使用されている請求項1〜4のいずれかに記載の透液性繊維不織布。
- 前記凸条部と前記凹条部とは、前記熱可塑性合成樹脂で形成された前記ステープル繊維を所要の平方メートル当たりの質量で含む繊維ウエブを機械方向へ連続的に走行させる一方、前記機械方向に対する交差方向へ間欠的に配置した複数のノズルから加熱空気を前記ウエブに向かって噴射することによって形成され、前記凸条部が前記交差方向において隣り合う前記ノズルどうしの間に形成されており、前記凹条部が前記ノズルの直下に形成されている請求項1〜5のいずれかに記載の透液性繊維不織布。
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- 2010-04-26 EP EP10774823.8A patent/EP2431513B1/en not_active Not-in-force
- 2010-04-26 KR KR1020117029943A patent/KR101708954B1/ko active IP Right Grant
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Also Published As
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AU2010248561B2 (en) | 2015-08-20 |
AU2010248561A1 (en) | 2011-12-01 |
US8722173B2 (en) | 2014-05-13 |
CN102482817A (zh) | 2012-05-30 |
BRPI1007751A2 (pt) | 2021-09-08 |
KR101708954B1 (ko) | 2017-02-21 |
CN102482817B (zh) | 2014-11-12 |
EP2431513A4 (en) | 2012-12-05 |
EP2431513B1 (en) | 2014-03-12 |
EP2431513A1 (en) | 2012-03-21 |
TW201043748A (en) | 2010-12-16 |
US20120045620A1 (en) | 2012-02-23 |
BRPI1007751B1 (pt) | 2022-02-08 |
EA201190230A1 (ru) | 2013-01-30 |
WO2010131565A1 (ja) | 2010-11-18 |
TWI529274B (zh) | 2016-04-11 |
KR20120026546A (ko) | 2012-03-19 |
JP5520124B2 (ja) | 2014-06-11 |
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