JP4833333B2 - 独自の水分保持特性を有する予め湿潤された拭取り布の積層体 - Google Patents
独自の水分保持特性を有する予め湿潤された拭取り布の積層体 Download PDFInfo
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- JP4833333B2 JP4833333B2 JP2009503004A JP2009503004A JP4833333B2 JP 4833333 B2 JP4833333 B2 JP 4833333B2 JP 2009503004 A JP2009503004 A JP 2009503004A JP 2009503004 A JP2009503004 A JP 2009503004A JP 4833333 B2 JP4833333 B2 JP 4833333B2
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- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
-
- 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.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting
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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.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
- Y10T442/277—Coated or impregnated cellulosic fiber fabric
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Nonwoven Fabrics (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Laminated Bodies (AREA)
Description
本明細書で使用する時、「繊維」は、本明細書に開示されるウェブの基本的要素を形成する単位を指す。繊維には、短繊維、不連続である短繊維より長い繊維、および連続繊維を含み、当該技術分野において「実質的に連続フィラメント」又は単に「フィラメント」と称される場合もある。繊維の調製方法は、繊維が短繊維であるか又は連続フィラメントであるかを決定するであろう。
本発明の拭取り布は、少なくとも2つの繊維性不織布ウェブの層の複合体を含む。拭取り布の実施形態は、約30から約120gsm、約40から約70gsm、又は約50から約60gsmまでの坪量を有する。
複合体は、当該技術分野において既知のいかなる方法によって作製してもよい。繊維性不織布ウェブは、複合体作製プロセスを有するインラインとは異なるプロセスにおいて予備形成されてもよい。例えば、外側の繊維性織布層、11Aおよび11B、および内側のパルプ層12は、固着したロール織物として提供されてもよい。しかしながら、図2は、繊維性不織布ウェブが複合体を有するインラインで製造される装置の略図を示す。
いくつかの実施形態において、本発明の拭取り布52は、かさばった質感を有し、予め湿潤された時の厚さ、および布のような外観と感触を提供する。またかさばった質感は、低密度および大きな平均孔径にもかかわらず、拭取り布52に優れた洗浄および液体保持特性も提供する。
本発明の複合体は、次の特許出願および特許公開:米国特許番号:第5,143,679号、第5,518,801号、第5,650,214号、第5,691,035号、第5,914,084号、第6,114,263号、第6,129,801号、第6,383,431号、第5,628,097号、第5,658,639号、および第5,916,661号、WO公開番号:2003/0028165A1号、WO2004/059061号、WO2004/058117号、およびWO2004/058118号、米国特許公開番号:2004/0131820A1号、および2004/0265534A1号、の方法を介して質感が付与されてもよい。
非平坦な複合体は、本発明の予め湿潤された拭取り布52を形成するために、ローションが飽和され、取り込まれる。飽和の取り込みは個々に、又は拭取り布52が液体不透過性容器100内の積層体101中に設置された後に生じてもよい。いくつかの実施形態において、予め湿潤された拭取り布は、拭取り布のグラム当たり約1.5から約6.0グラムのローションの飽和を含んでいてもよく、その他の実施形態においては、拭取り布のグラム当たり約2.5から約4.0グラムのローションの飽和を含んでいてもよい。
積層体および拭取り布を既知する人々同様に、本発明によって網羅される予め湿潤された拭取り布52(およびそれらを備える拭取り布)の積層体101の水分保持特性に関する物理特性は、次のように測定される。結果として生じるデータは、以下の実施例区分において詳細に論じられる。測定された特性としては、飽和荷重、飽和勾配指数、吸収能力、動的吸収時間、細孔容積分布、および坪量に対する湿潤状態の厚さの比率、が挙げられる。各テスト測定は、特に指定がない限り、室温状態で行われた。
パーセント飽和としてしばしば表現される飽和荷重は、ローションの質量を表す乾燥基質の質量のパーセンテージとして定義される。例えば、1.0の飽和荷重(100%飽和に等しい)は、基質上のローションの質量が乾燥基質質量に等しいことを示す。
拭取り布の積層体の飽和勾配指数は、積層体の底部の1組の拭取り布数の飽和荷重と、積層体の上部の拭取り布の同じ数の飽和荷重との比率として計算される。例えば、拭取り布の積層体の総数約80枚の場合、飽和勾配指数は、底部および上部の10枚の拭取り布を使用する比率であり、拭取り布の積層体総数約30枚の場合、底部から上部の5枚の拭取り布が使用される、および30枚未満の場合、上部および底部の単一の拭取り布だけが飽和勾配指数計算に使用される。次の方程式は、総数80枚の積層体の飽和勾配指数の計算の実施例を例証する。
EDANA10.4〜02後にモデルとなった次の方法は、ウェブ又は拭取り布が乾燥又は湿潤状態のいずれかである時、例えば、予め湿潤されている時、いかなる不織布ウェブ又は完成した拭取り布の吸収能力を測定することに適している。
1.取って付き平面ステンレススチールワイヤゲージ試料押さえ、平面金網は少なくとも120mm×120mmである。
2.約20mmの深さの試験液において、試料を付けた状態の見本押さえを水に沈めるのに適したサイズの皿。
3.試料押さえ上の見本を固定するクリップ
4.リング・スタンド
5.少数第4位まで読み取る天秤
6.ストップウォッチ
7.開示されるデータの試験液は、脱イオン水(抵抗率>18メガオーム・cm)
5つの別々の吸収能力測定のための基質試験片を準備する。試験片は、約100mm×100mmの大きさに切られ、個々の試験片が、1グラム未満の重さになる場合、少なくとも合計で1グラムの重さになるように、試験部分品を共に積層する。皿を十分な量の試験液で満たし、室内試験条件に平衡させる。クリップでワイヤゲージ試料押さえに部分品を固定する前に、第1の測定のための試験片の質量を記録する。気泡の生成を回避しようとする一方、試料押さえを試験液に約20mmの深さまで浸し、60秒間静置させる。試料および押さえを皿の液体から取り除き、1つ以外の全ての固定するクリップを取り除き、そしてサンプルをだらりと垂直に掛け又は合計120秒間排水されるように、サンプル押さえをリング・スタンドに取り付ける。排出期間の結果後、押さえから試料を静かに取り除き、試料の質量を記録する。残りの4つの試験片又は試験片一式に対し繰り返す。
DATは、試験液を吸収する不織布ウェブ又は拭取り布の能力の測定を提供し、液体不透過性容器の積層体中に保存される時、どれほど優れた予め湿潤された不織布ウェブ又は拭取り布が、飽和荷重に保持されるかの測定として同様に使用される。
細孔容積分布測定は、TRI/オートポロシメータ(TRI/Autoporosimeter)(ニュージャージー州プリンストン(Princeton, NJ)のTRI/プリンストン社(TRI/Princeton Inc.))上で行われる。TRI/オートポロシメータ(TRI/Autoporosimeter)は、多孔質材料の細孔容積分布(例えば、有効孔半径1〜900ミクロン(μm)の範囲内の異なるサイズの孔の容積)を測定するための自動コンピュータ制御機器である。無料配布の自動機器ソフトウェア、2003年1月/2005年1月配布、およびデータ処理ソフトウェア、2002年1月配布が、データの取り込み、分析および出力のために使用される。TRI/オートポロシメータ(TRI/Autoporosimeter)についてのさらなる情報、その操作およびデータ処理については、コロイドおよび界面科学誌(The Journal of Colloid and Interface Science)162巻(1994年)、163〜170ページに見出すことができる。
圧力差=[(2)γcosθ]/有効半径
この場合、γ=液体表面張力、およびθ=接触角である。
本発明の拭取り布の坪量に対する厚さの比率は、次の手順を使用して得られる値から計算される。
1.好ましくは、予め切ってある金属の型およびダイ圧力を使用して、既知の特定の寸法に少なくとも3つの不織布の試験片を切断する。各試験片は典型的に、少なくとも0.01m2の面積を有する。
2.グラム中の各試験片の質量を決定するために残部を使用する、方程式(1)を使用して、1平方メートル当たりのグラム数(gsm)で、坪量(1単位面積当たりの質量)を計算する。
4.限られた不織布の量のみが利用可能である場合、坪量は、可能な最大矩形の1試験片の坪量として測定、記録されてもよい。
1.好ましくは、予め切ってある金属の型およびダイ圧力を使用して、2500mm2よりも大きな面積をそれぞれ有する少なくとも10の試験片を切断する。あるいは、より大きな全体サンプルの多重測定が、合計で10回の測定に達するように使用される場合がある。
2.方程式(2)を使用して計算されたローションの必要量を適用することによって、典型的に20〜35ダイン/cmの表面張力を有する液体を使用し、所望のローションの荷重になるようにサンプルをローションに浸す(湿潤状態)。ローションの荷重は、ローションの質量を示す乾燥基質の質量のパーセンテージとして定義される。例えば、1.0のローション荷重(100%飽和に等しい)は、基質上のローションの質量が乾燥基質質量に等しいことを示す。
4.不織布サンプルの湿潤状態の厚さが全ての試験片の湿潤厚さの数値平均として記録される。
(実施例1)
本発明による予め湿潤された拭取り布52は、次のように用意される。BBAファイバウェブ社(BBA Fiberweb)(米国南カロライナ州シンプソンヴィル(Simpsonville, South Carolina, U.S.A.))製造の、ポリエチレン系ポリプロピレンの2成分繊維基質は、始動スパンボンドである。このスパンボンドは、熱的に固着した約2.0デニール繊維を備える20gsmのスパンレイド不織布である。パルプは、湿潤強度向上樹脂のような追加の湿式化学添加物を含まない20gsmの北部針葉樹クラフト湿式ティッシュである。複合体は、パルプの内層を有するスパンボンド不織布の2つの外層を層化し、層からの繊維が絡み合った範囲に対し水流交絡させることによって形成される。複合体には、図9に示される質感が提供される。複合体は、66gsmの坪量を有する。
本発明による予め湿潤された拭取り布52は、スパンボンドが、2.0デニールのポリエチレン系ポリプロピレンの2成分繊維を含む代わりに、約3.0デニールのポリエチレン系ポリプロピレンの2成分繊維を含むことを除き、実施例1によって用意される。
予め湿潤された拭取り布は、次のように用意された。複合体の不織布は、層の繊維が絡み合った範囲までのパルプの内側の層とスパンボンド不織布の2つの外側の層を水流交絡させることによって形成される。スパンボンドの外側の層は約20gsmの坪量を有し、スパンレイドされおよび熱結合された約3.0デニールのポリプロピレン繊維を含む。スパンボンド物質は、PGI社(米国バージニア州ウェーンズバロ(Waynesboro, Virginia U.S.A.))によって製造される。内側のパルプ層は、湿潤強度向上樹脂のような追加の湿式化学添加物を含まない約20gsmの北部針葉樹クラフト湿式ティッシュである。複合体不織布は、図9に示される質感を提供するように処理される。
予め湿潤された拭取り布は、スパンボンドが、3.0デニールのポリプロピレン繊維を含む代わりに、約4.0デニールのポリプロピレン繊維を含むことを除き、比較例3に従って用意される。
Claims (12)
- 予め湿潤された拭取り布52の積層体101であって、前記積層体101が、50mm〜300mmの高さおよび1.0から1.5の飽和勾配指数を有し、
前記拭取り布52が、繊維性不織布ウェブの少なくとも第1の層11Aおよび第3の層11Bの複合体を含み、前記第1の層11Aおよび前記第3の層11Bが、平均繊維デニールが2.5〜6.0である合成繊維を備え、前記複合体は、パルプを備える第2の層12をさらに備え、前記第1の層11Aが、前記層間の結合により向かい合わせの関係にある前記第2の層12に結合され、前記第3の層11Bが、前記層間の結合により向かい合わせの関係にある前記第2の層12に結合され、前記結合が、前記層間の繊維の絡み合いを含み、
前記拭取り布が、拭取り布のグラム当たりの液体組成物が1.5〜6.0グラムの飽和荷重を有することを特徴とし、前記液体組成物が、センチメートル当たり20〜35ダインの表面張力を有する、予め湿潤された拭取り布の積層体。 - 前記拭取り布が、0.01〜0.2秒の動的吸収時間を有することを特徴とする、請求項1に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布の前記複合体が、前記複合体の平面に存在する少なくとも1つの第1の区域、および少なくとも1つの第2の非平面区域を備え、前記第2の非平面区域が、前記平面から突出した要素を備える、請求項1に記載の予め湿潤された拭取り布の積層体。
- 前記繊維性不織布ウェブが、スパンボンド不織布ウェブであり、
前記合成繊維が、合成多構成成分繊維であり、
前記層間の繊維の絡み合いが、水流交絡を介して得られたものであり、
前記拭取り布が、0.01〜0.2秒の動的吸収時間を有することを特徴とする、請求項1に記載の予め湿潤された拭取り布の積層体。 - 前記合成繊維が、単一成分繊維、多成分繊維、二構成要素繊維、およびこれらの組み合わせから成る群から選択される、請求項1〜4のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記多構成成分繊維が、ポリプロピレンを含んでなるコアと、ポリエチレンを含んでなるシースとを含む、請求項5に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布が、70重量%〜30重量%のパルプと、好ましくはポリプロピレン、ポリエチレン、およびそれらの組み合わせ、ビスコース、ならびにそれらの組み合わせから成る群から選択される30重量%〜70重量%の合成繊維とを含む、請求項1〜6のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布が、乾燥基質1グラム当たり2.5〜15.0グラムのローション吸収能力を有する、請求項1〜7のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布が、メートル坪量当たり0.008〜0.024ミリメートル(mm/gsm)の湿潤状態厚さ対坪量の比を含む、請求項1〜8のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記繊維が成形加工されている、請求項1〜9のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布が、0.01〜0.2秒の動的吸収時間を有する、請求項3および5〜9のいずれか一項に記載の予め湿潤された拭取り布の積層体。
- 前記拭取り布が、細孔容積分布が平均孔半径に対してプロットされる場合、多様な分布を含むプロットが得られるような、前記細孔容積分布及び前記平均孔半径を有する孔を備え、少なくとも1つのピークが200ミクロンを下回り、少なくとも1つのピークが300ミクロンを上回る、請求項3〜11のいずれか一項に記載の予め湿潤された拭取り布の積層体。
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Also Published As
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JP2009532095A (ja) | 2009-09-10 |
PL1998659T3 (pl) | 2014-04-30 |
EP1998659B2 (en) | 2021-07-14 |
WO2007126974A3 (en) | 2008-01-17 |
CA2648061C (en) | 2012-12-04 |
WO2007126974A2 (en) | 2007-11-08 |
ES2444372T3 (es) | 2014-02-24 |
EP1998659B1 (en) | 2013-11-20 |
US8410005B2 (en) | 2013-04-02 |
CA2648061A1 (en) | 2007-11-08 |
MX2008011675A (es) | 2008-09-22 |
EP1998659A2 (en) | 2008-12-10 |
US20070228064A1 (en) | 2007-10-04 |
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