JP5701988B2 - 改善された柔軟性信号を有する吸収性物品及びその構成要素、並びに製造方法 - Google Patents
改善された柔軟性信号を有する吸収性物品及びその構成要素、並びに製造方法 Download PDFInfo
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- JP5701988B2 JP5701988B2 JP2013524998A JP2013524998A JP5701988B2 JP 5701988 B2 JP5701988 B2 JP 5701988B2 JP 2013524998 A JP2013524998 A JP 2013524998A JP 2013524998 A JP2013524998 A JP 2013524998A JP 5701988 B2 JP5701988 B2 JP 5701988B2
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Landscapes
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- Inorganic Chemistry (AREA)
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Description
「吸収性物品」とは、身体の排出物を吸収及び保持する装置のことを指し、より具体的には、着用者の身体に接して、又は近接して配置されることにより、身体から排出される様々な排出物を吸収及び保持する装置のことを指す。吸収性物品には、おむつ、トレーニングパンツ、成人用失禁下着及びパッド、女性用衛生用品、胸パッド、介護用マット、涎掛け、創傷包帯用品などが挙げられ得る。本明細書で使用するとき、用語「排出物」には、尿、血液、膣排泄物、母乳、汗、及び糞便が挙げられるが、これらに限定されない。
上述の記載は、吸収性物品の特徴を記載しており、それらの任意の組み合わせは、消費者の物品の柔軟性の知覚を改良するために採用され得る。しかしながら、それに加えて、例えば、トップシート18及び/又はバックシート20(図2A、2B参照)を含む、吸収性物品の構成要素として使用され得る不織布ウェブを以下の記載に従って製造することは、構成要素の柔軟性信号の改良を提供し、全体として物品の柔軟性の知覚を改良することに対して相乗効果をもたらすと考えられる。同時に、直感に反して、後述される特徴は、不織布ウェブの引張強度を改良し、その結果、トップシート、バックシート、又はそれを形成する他の構成要素の引張強度を改良する。柔軟性信号を改良しようとするとき、不織布の引張強度を保ち又は改良することは、少なくとも2つの理由で吸収性物品における特定の関心事となり得る。第1に、不織布ウェブは典型的に、下流製造操作において効果的に処理ができるように、特定の最小引張力に耐え、受ける寸法変化が十分に低いことが必要となる場合がある。第2に、不織布ウェブは典型的に、例えば、使い捨ておむつなどの、着用者に適用/着用される際(例えば、介護者がおむつを適用するために締結部材を引張るとき)に生じる力、着用者の動き、嵩及び重量、並びにおむつが着用者の排出物で満たされたときにバックシートによって封じ込められ支持される嵩に、バックシートが耐えることが必要とされる、吸収性製品内のバックシート積層体の構造的一体性に対して実質的に貢献する場合がある。
本発明の代表的な実施形態では、サンプルAは、ExxonMobil 3155ポリプロピレンで形成された2つの層と、ExxonMobil 3155で作製された不織布の底部層を伴うExxonMobil SFT315ポリプロピレン配合物で形成された2つの層との、繊維の4つの層(層A、B、C、D)を備える、4つのビームプロセスで作製されたスパンボンド不織布であった。各層は、約30重量%のポリプロピレンと、層に対して約1.75重量%のTiO2に対応する70重量%のTiO2(漂白剤)とを含有する、2.5重量%のマスターバッチを含んだ。スパンボンド不織布は、下記の実施例2に記載される結合パターンを使用して結合された。不織布の底部側は、それぞれ4.99MPa(50バール(725p.s.i.))圧力であり、総エネルギー伝送が0.02kwhr/kgである2列の噴射口を使用して水力処理された。
ポリマーフィルムに積層体化/接着された改善されたスパンボンド不織布ウェブを含む、改善されたバックシート積層体が製造された。不織布ウェブは、本明細書に記載されるように、パターンカレンダーローラーと平滑カレンダーローラーとの間のニップ間で一定のパターンでカレンダー結合され、図3Bに概略的に示されるように結合型押パターンを付与された。改善されたウェブは、約25gsmの坪量を有し、及びPPを含んだ。
I.自由積み重ね体高さの決定
機器
・おもりを加えるための垂直摺動プレートを含む、おむつパッケージ化万能試験機(UDPT)これは、吊るしたおもりで相殺され、垂直摺動プレートアセンブリからおむつパッケージに下方への力が加えられていないことを常に確実にする。UDPTは、郵便番号659−0014、日本国兵庫県芦屋市翠ケ丘町7−21−101、松下電器産業(Matsushita Industry)から入手可能である。この試験機に関する更なる詳細については、米国特許出願公開第2008/0312624号を参照。
・850g(±5g)のおもり。
・1秒までの正確性を有するストップウォッチ。
A)装置校正
・垂直摺動プレートを、その底部が試験機底板に接するまで引き下げる。
・垂直摺動スケールの横に位置するデジタルメーターを、ゼロのマークに合わせる。
・垂直摺動プレートを、試験機底板から上げて離す。
・バッグ内圧縮前自由高さとは、10枚の新しいおむつのパッドに関して測定された自由高さデータを示す。
・新しいおむつ−圧縮されていない10枚のおむつ(積み重ね体は、スタッカーから出た直後に、いかなる圧縮が行なわれる前に取り出されるべきである(安全にこれが可能である場合)。これが不可能である場合は、これらは、安全に停止されたスタッカーチェーンの指から取り除かれるべきである)。
・バッグ外自由高さとは、10枚の経時変化したおむつのパッドに関して測定された自由高さデータを表す。
・経時変化したおむつ−およそ1分及び/又はそれ以上にわたって圧縮状態に維持された10枚のおむつ(即ち、10枚のおむつは、新たに開いたおむつパッケージからもたらされる)。
・適切な供給源の中央から10枚の隣接するおむつのパッドを選択する(バッグ内圧縮前自由高さに関しては新しいおむつ、バッグ外自由高さに関しては経時変化したおむつ)。
・これらの10枚のおむつのパッドを、垂直摺動プレートの下に、整然と積み重ねる。(一番上のパッドの中央を、垂直摺動プレートの中央座ぐり穴の真下に揃える。)・850gのおもりを垂直摺動プレート上に定置する。
・垂直摺動プレートを、その底部が積み重ね体の所望の最も高い点に軽く触れるまで、下方に摺動させる。
・デジタルメーターに示される値を読んで、mmで積み重ね体の寸法を測定する。
・おもりを取り除く。
・垂直摺動プレートを上げて積み重ね体から離し、積み重ね体を取り除く。
・デジタルメーターに表示される積み重ね体高さの読み取り値を1mmの単位まで記録する。
A)異なるサンプルセットから、最低で3つのデータポイントを収集し、例えば、新しいおむつから第1点を測定し、例えば、バッグ内で30分/1時間/6時間/12時間/24時間にわたって経時変化したおむつから第2点を測定し、例えば、バッグ内で5日又はそれ以上にわたって経時変化したおむつから第3点を測定する。
A)10枚の、新しい/経時変化したおむつのパッドを収集する。
・サンプルの識別、即ち、試験される製品の完全な記載(製品の商品名/サイズ)を記録する。
・全ての測定に関する決定値を1mmの単位まで記録する。
注:一連の測定の場合においては、試験されるサンプルの数を記録し、平均、標準偏差、最小値及び最大値を計算/記録する。
・測定されたパッケージの製造日を記録する(パッケージコーディングから得られる)。
・試験データ及び使用された分析方法(GCAS)を記録する。
機器
・おもりを加えるための垂直摺動プレートを含む、おむつパッケージ化万能試験機(UDPT)これは、吊るしたおもりで相殺され、垂直摺動プレートアセンブリからおむつパッケージに下方への力が加えられていないことを常に確実にする。UDPTは、郵便番号659−0014、日本国兵庫県芦屋市翠ケ丘町7−21−101、松下電器産業(Matsushita Industry)から入手可能である。
・850g(±5g)のおもり。
・「パッケージ幅」は、おむつパッケージの同一の圧縮積み重ね体の軸に沿った、2つの最高膨出点の間の最大距離として定義される。
・バッグ内積み重ね体高さ=(パッケージ幅/1積み重ね体当たりのパッド数)×おむつパッド10枚。
・垂直摺動プレートを、その底部が試験機底板に接するまで引き下げる。
・垂直摺動スケールの横に位置するデジタルメーターを、ゼロのマークに合わせる。
・垂直摺動プレートを、試験機底板から上げて離す。
・おむつパッケージのサイドパネルの1つを、試験機底板の中央に立ててその幅に沿って置く。水平摺動プレートが、試験されるパッケージに接触しないよう、右に引き寄せられていることを確認する。
・垂直摺動プレートに、850gのおもりを加える。
・垂直摺動プレートを、その底部がパッケージの所望の最も高い点に軽く触れるまで、下方に摺動させる。
・パッケージの幅をmmで測定する(底板の頂部から、おむつパッケージの頂部までの距離)。デジタルメーターに示される読み取り値を記録する。
・850gのおもりを取り除く。
・垂直摺動プレートを上げて、おむつパッケージから離す。
・おむつパッケージを取り除く。
・「バッグ内積み重ね体高さ」=(パッケージ幅/1積み重ね体当たりのパッド数)×10、を計算及び記録する。
・サンプルの識別、即ち、試験される製品の完全な記載(製品の商品名/サイズ)を記録する。
・各測定における決定値(長さ/幅/前部から後部)を1mmの単位まで記録する。
注:一連の測定の場合においては、試験されるサンプルの数を記録し、平均、標準偏差、最小値及び最大値を計算/記録する。
・測定されたパッケージの製造日を記録する(パッケージコーディングから得られる)。
・試験データ及び使用された分析方法(GCAS)を記録する。
・%を計算する:1−(バッグ内積み重ね体高さ)/(自由積み重ね体高さ)=%
材料の不透明度とは、その材料によって遮断される光の度合いである。より高い不透明度値は、その材料がより高度に光を遮断することを示す。不透明度は、0°照明/45°検出、周辺の光学的形状、HunterLab LabScan XE running Universal Software(バージニア州Reston所在のHunter Associates Laboratory Inc.,から入手可能)などの、コンピュータインターフェースを伴う分光光度計を使用して測定され得る。計器校正及び測定は、販売元による標準白黒校正プレートを使用してなされる。全ての試験は、約23±2℃及び相対湿度約50±2%で維持された調湿室内で行なわれる。
不透明度=Y値(黒色裏材)/Y値(白色裏材)×100
平均測定高さは、ドイツ、Teltow/BerlinのGFMesstechnik GmbHから市販されている、GFM Primos Optical Profiler計器を使用して測定される。GFM Primos Optical Profiler計器は、以下の主な構成要素からなる、デジタルマイクロミラー投影に基づく小型の光学測定センサを含む。a)1024×768の直接デジタル制御式マイクロミラーを有するDMDプロジェクタ、b)高解像度(1300×1000ピクセル)CCDカメラ、c)少なくとも27×22mmの測定面積に適合した投影光学、d)少なくとも27×22mmの測定面積に適合した記録光学、e)小型の硬い石板を土台とした卓上三脚、f)冷光源(適切なユニットは、マサチューセッツ州Southbridge所在のSchott North America,Inc.,のKL 1500 LCD)、g)ODSCAD 4.14−1.8ソフトウェを実行する、測定、制御、及び評価コンピュータ、並びにh)販売元から入手可能な、水平(x−y)及び垂直(z)校正用校正プレート。
測定高さ=非結合領域高さ−結合型押高さ
引張強度は、測定した力がセルの限界の10%〜90%以内となるロードセルを使用して、コンピュータインターフェースを有する一定速度の引張試験機(好適な計器は、ミネソタ州Eden Prairie所在のMTS Systems Corp.から入手可能な、Testworks 4.0 Softwareを使用したMTS Allianceである)で測定する。可動式(上部)空気圧つかみ具及び固定式(下部)空気圧つかみ具の双方に、試験試料の幅よりも広いゴム張りの把持部を装着する。全ての試験は、約23℃±2℃及び相対湿度約50%±2%で維持された調整室内で行なわれる。
引張強度=ピーク力(gf)/試料の幅(cm)
面積及び距離の測定を、反射モードにおいて少なくとも1889.8dpcm(4800dpi)の解像度でスキャン可能なフラッドベッドスキャナーを使用して、生成された画像上で実施する(好適なスキャナーは、米国、EpsonのEpson Perfection V750 Proである)。分析は、ImageJ software(米国、National Institutes of HealthのVs.1.43u)を使用して実施され、NISTによって認定された定規に対して校正される。
ROIを、結合型押の縁部がはっきりと決定され得るように拡大する。面積ツールを使用して、結合の周囲を手動でなぞる。面積を0.001mm2の単位まで計算し、記録する。全試料にわたって無作為に選択された合計10個の隣接していない結合に対して、繰り返す。測定は、各物品からの双方の試料に対して行う。各サンプルセットに対して、合計で3個の同じ物品を測定する。全60個の結合領域測定値の平均及び標準偏差を計算し、0.001mm2の単位まで記録する。
経路を形成する、単一の完全反復する一連の結合型押を特定し、その反復シリーズが視野を埋めるように画像を拡大する。経路に沿って、そのシリーズ内の全結合型押を結び、またそれらを通って延在する線を描画する(例えば、図3Bの線105)。結合型押内に含まれる線に沿って、寸法を測定する(例えば、図3BのD1、D2、D3)。次に、反復シリーズ内の第1の結合型押の先行縁部から、線分に沿って次に隣接するシリーズ内の第1の結合型押の先行縁部までの、線分の距離を測定する(例えば、図3BのDo)。線分に沿った結合の長さの和を計算し(例えば、D1+D2+D3)、線分(例えば、Do)の長さで除し、100%を乗ずる。結合経路/結合長さ比を、0.001の単位まで記録する。全試料にわたって無作為に選択された合計5個の隣接していないROIに対して、繰り返す。測定は、各物品からの双方の試料に対して行う。各サンプルセットに対して、合計で3個の同じ物品を測定する。全60個の結合経路/長さ比測定値の平均及び標準偏差を計算し、0.001の単位まで記録する。反復シリーズを形成する不規則な形状の結合型押に関しては、線を、それに沿って測定することが可能な結合型押長さの最大和を得るように配置することに留意されたい。
結合型押と非結合領域との単一の反復パターンを特定し、その反復パターンが視野を埋めるように画像を拡大する。ImageJで、反復パターンを包含するボックスを描画する。図3Bに示される例に関しては、これは幅WS2及び長さLS2の箱となる。図3Bに示される例では、角で共有される結合型押は、必要に応じて適切に長手方向又は横方向に沿って、半分に分割されることに留意されたい。ボックスの面積を計算し、0.01mm2の単位まで記録する。次に、面積ツールでボックス内の個々の結合型押又はそれらの部分を全体になぞり、ボックス内の全結合型押又はその部分の面積を計算する。0.01mm2まで記録する。以下の通りに計算する。
結合領域率=(ボックス内の結合型押の面積の和)/(ボックスの面積)×100%
不織布外側カバーの剛性を、ASTM D6828−02に従って測定した。分析のため、標準に記載される100mm×100mmの試料の代わりに、76.2mm×76.2mmの正方形試料が使用された。
Claims (12)
- 着用者の胴体下部の周りに着用されるように適合された吸収性物品であって、長手方向軸を有し、
液体透過性トップシートと、
液体不透過性バックシートと、
前記トップシートと前記バックシートとの間に配置された吸収性コアと、を備え、
前記液体不透過性バックシートが、
液体不透過性かつ蒸気透過性ポリマーフィルムの着用者に面する層と、不織布ウェブの衣類に面する層との積層体を備え、前記不織布ウェブが、第1の結合型押パターンで型押しされ、前記第1の結合型押パターンが、第2の非結合隆起区域パターンを画定し、
前記隆起区域が、前記結合型押に対して少なくとも280μmの平均測定高さを有し、前記不織布ウェブが、
ポリオレフィンと、最大5.0重量%のTiO2とを含むスパンレイド繊維で形成され、
30gsm以下の坪量を有し、
45以上の不透明度を有し、
少なくとも10%の結合領域率を有し、
前記第1の結合型押パターンが、前記結合型押によって画定される少なくとも2つの隣接した平行な直線経路を備え、各経路に沿って1本の線が存在し、それに沿って、結合されていない長さによって分離される結合された長さがあり、結合された長さの合計の、結合された長さおよび結合されていない長さの合計に対する結合長さ比が、少なくとも35%であるが75%未満であり、
前記不織布ウェブが、カレンダー結合プロセス後に片側水力拡張プロセスを経ていることを特徴とする、吸収性物品。 - 前記スパンボンド繊維が、少なくとも50重量%のポリプロピレンを含む、請求項1に記載の物品。
- 前記スパンボンド繊維のうちの実質的に全てが、モノコンポーネントである、請求項1又は2に記載の物品。
- 前記不織布ウェブが、少なくとも8.83N/cm(900gf/cm)の機械方向の引張強度を有する、請求項1〜3のいずれか一項に記載の物品。
- 前記不織布ウェブが、少なくとも2.94N/cm(300gf/cm)の横断方向の引張強度を有する、請求項1〜4のいずれか一項に記載の物品。
- 前記経路を形成する前記結合型押が、実質的に均一な形状であり、前記経路に沿って実質的に均一に分布される、請求項1〜5のいずれか一項に記載の物品。
- 前記結合型押が、実質的に平行四辺形の形状を有する、請求項1〜6のいずれか一項に記載の物品。
- 前記不織布ウェブが、前記不織布ウェブと前記ポリマーフィルムとの間に配置された熱可塑性ポリマー接着剤によって前記ポリマーフィルムに結合され、前記熱可塑性接着剤が、機械方向に沿って長手方向に位置するストリップ状に塗布され、前記積層体が、前記ストリップ間に接着剤を含まない区域を有する、請求項1〜7のいずれか一項に記載の物品。
- 前記長手方向ストリップが、横断方向に沿って、1センチメートル当たり3〜4ストリップの頻度で塗布される、請求項8に記載の物品。
- 前記結合領域率が20%以下である、請求項1〜9のいずれか一項に記載の物品。
- 前記ポリマーフィルムが、前記不織布ウェブと共に積層体化される前に、機械方向に沿って1%〜5%伸張されている、請求項1〜10のいずれか一項に記載の物品。
- 水力拡張は、2.5MPa〜10MPaの圧力で行われる、請求項1に記載の物品。
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2011
- 2011-08-19 EP EP11748862.7A patent/EP2605739B1/en active Active
- 2011-08-19 WO PCT/US2011/048401 patent/WO2012024576A1/en active Application Filing
- 2011-08-19 CN CN201180040291.1A patent/CN103108616B/zh active Active
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- 2011-08-19 US US13/213,204 patent/US8722963B2/en active Active
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US20160367408A1 (en) | 2016-12-22 |
US20120189814A1 (en) | 2012-07-26 |
US9629755B2 (en) | 2017-04-25 |
CA2807183A1 (en) | 2012-02-23 |
US9446163B2 (en) | 2016-09-20 |
US20120177886A1 (en) | 2012-07-12 |
US9770371B2 (en) | 2017-09-26 |
US20150174282A1 (en) | 2015-06-25 |
US20120179125A1 (en) | 2012-07-12 |
BR112013002433A2 (pt) | 2016-05-24 |
US20160262955A1 (en) | 2016-09-15 |
JP2013534177A (ja) | 2013-09-02 |
US10426671B2 (en) | 2019-10-01 |
EP2605739A1 (en) | 2013-06-26 |
US8722963B2 (en) | 2014-05-13 |
US20120179126A1 (en) | 2012-07-12 |
CA2807183C (en) | 2016-06-07 |
EP2605739B1 (en) | 2023-11-15 |
CN103108616A (zh) | 2013-05-15 |
CN103108616B (zh) | 2016-01-20 |
US8841507B2 (en) | 2014-09-23 |
WO2012024576A1 (en) | 2012-02-23 |
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