JP2008528178A - 抵抗力が低く緩慢に回復する弾性腰部を有する使い捨てプルオンおむつ - Google Patents
抵抗力が低く緩慢に回復する弾性腰部を有する使い捨てプルオンおむつ Download PDFInfo
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Abstract
Description
解放率および最大抵抗力パーセント
この方法は、伸長から解放された後に回復する時点でプルオン衣料によって与えられる抵抗力を測定するために使用される。抵抗力データは、ある所与の時間において示される最大抵抗力の百分率の基準である、最大抵抗力パーセントを計算するために使用されてもよい。抵抗力データは、ある時点からの抵抗力の変化をその後のある時点と比べたときの基準である、解放率を計算するために使用されてもよい。時間値は、ゲージ長さ(ただし必ずしも試料でなくてもよい)が、80%歪みから回復する際に30%歪みに達した時点から測定される。ゼロ時点は、後述する引張り試験機プログラムの工程6に対応する。
1.時間チャンネルがゼロに設定される。負荷チャンネルがゼロに設定される。
2.ゲージ長さが、508mm/分のクロスヘッド速度で80%歪みまで伸展される(即ち、最初のゲージ長さが、最初のゲージ長さの1.8倍に等しい長さまで伸展される)。
3.試料が80%歪みで10秒保持される。
4.(任意に)試料を活性化する必要がある場合、試料を活性化するトリガ事象が工程3の終了時に適用される。例えば、試料が熱収縮性フィルムを含む場合、工程3の10秒の保持時間の終了時に十分な熱が適用されてもよい。
5.ゲージ長さが、508mm/分のクロスヘッド速度で30%歪みまで低減される(即ち、最初のゲージ長さの1.3倍に等しい長さまで低減される)。
6.30%歪みに戻ると、時間チャンネルが再びゼロに戻され、抵抗力値が記録されてもよい(以下の表1を参照)。ゲージ長さが30%歪みで3分維持される。
7.抵抗力値が記録され、時間に対してプロットされる。
30%回復時間は、80%歪みの伸長から解放された後に、プルオンおむつが30%歪みに戻るのに掛かる時間の基準である。この計算の目的上、試料は、測定可能な抵抗力が試料によって与えられ、引張り試験機によって記録されて(上述の方法の工程7)すぐに、30%に戻ったものと見なされる。30%回復時間は、抵抗力が試料によってフック上に与えられる時間である。30%回復時間は、「反発」の定性的現象の定量的基準と見なすことができる。低い30%回復時間を示す試料は、80%歪みにおいて伸長力から解放された後、試料が瞬間的に30%歪みに回復する(即ち、一般に約1秒未満の時間と考えられる)という点で、高速であると見なしてもよい。対照的に、より高い30%回復時間を示す試料は、時間を掛けて試料が30%歪みに回復する(即ち、一般に約1秒超過の時間と考えられる)という点で、緩慢であると見なすことができる。更に、時間ゼロはゲージ長さが30%歪みに戻ると始まるので、時間ゼロにおいて抵抗力を示す試料は、少なくとも引張り試験機のゲージ速度と同程度高速で回復したと見なしてもよい。80%歪みから30%歪みに戻るときのゲージ速度は508mm/分なので、時間ゼロにおいて抵抗力を示す試料は、508mm/分以上の回復速度を示すと考えられる。
この方法は、温度および時間に応じて変わるエラストマーの伸長後歪みを決定するのに使用される。この方法は延伸方法および回復方法を包含する。測定は、22℃(72°F)又は32℃(90°F)で行われてもよい。この方法は、フィルムクランプ、データ取得用のサーマル・アドバンテージ/サーマル・ソリューションズ(Thermal Advantage/Thermal Solutions)ソフトウェア、およびデータ分析用のユニバーサル・アナリシス2000(Universal Analysis 2000)ソフトウェアを備えた、TAインスツルメンツ(TA Instruments, Inc.)(デラウェア州ニューキャッスル(New Castle))から入手可能なTAインスツルメンツDMA2980(以下、「DMA2980」などの、動的機械的分析器(DMA)を用いる。他の様々なタイプのDMA装置があるが、動的機械的分析を使用することは、ポリマーおよびコポリマーの特性決定の分野において当業者には周知である。
1)エラストマーフィルムは、デクスコ・ポリマーズ(Dexco Polymers L.P.)(テキサス州ヒューストン(Houston))から入手可能なベクトル(Vector)4211約45%、ポリ(t−ブチルスチレン)45%、および鉱物油10%を含んで化合されてもよい。ポリ(t−ブチルスチレン)は、理想的には、約12kDa重量平均分子量のものである。エラストマーフィルムは熟成された。実施例1および2に使用されるフィルムは少なくとも24ヶ月熟成された。
2)エラストマーフィルムは、長さ120mm、幅5mm、および厚さ約0.14mm〜約0.17mmのほぼ方形のバンドにサイズ変更されてもよい。バンドは、600mmまで伸長され(即ち400%の歪み)、第1の基材に結合されてもよい。第1の基材は、長さが620〜660mm、幅が70〜120mm、好ましくは70mmであってもよい。第1の基材は、ファイバーテックス(Fibertex A/S)(デンマーク、アールボルグ(Aalborg))から入手可能な供給元コードH0201010などの、市販の不織布であってもよい。幅5mmのエラストマーフィルムのバンド約14本が、ボスティク・フィンドレー(Bostik Findley)(マサチューセッツ州ミドルトン(Middleton))から入手可能なH2031などの接着剤を使用して、第1の基材に接着されてもよい。第1の基材上において約30g/m2の接着剤塗布量(laydown)が十分である。バンドは、第1の基材の幅全体にわたって均一に分配される。伸長された状態において、バンドは、実質的に第1の基材の長さを延び、基材の最も長い縁部にほぼ平行である。
3)第2の基材は、接着剤を再び塗布することにより、バンドが間に位置付けられるようにして第1の基材に結合される。理想的には、第2の基材は第1の基材と同一(即ち、同じ寸法および組成)であってもよい。接着剤(即ち、H2031)の二度目の塗布は、第1の基材/バンド積層体に適用されてもよい。結果として得られる延伸性積層体は、ハンドローラーを使用して圧縮される。
4)2つの延伸性積層体が工程1〜3にしたがって形成されてもよい。2つの延伸性積層体は、2つの積層体が完全に重なり合うように向かい合わせの関係に置かれてもよい。2つの積層体は、それらの最も短い末端縁部に沿って互いに結合される。結合領域は、積層体の最も長い縁部に沿って測定したとき、幅約5mm〜約15mmの任意の長さを延びてよい。2つの積層体は、塗布量(laydown)30g/m2のH2031などの接着剤で互いに結合される。
5)2つの結合された延伸性積層体により、約300〜380mmの外周を有する腰部バンドが得られる。実施例1は約306mmの外周を有していた。実施例2は約360mmの外周を有していた。
表1および2に後述されるのは、実施例1〜8に対する解放率試験の結果である。表1は、別個の時点における実施例の未加工(raw)の抵抗力値を列挙している。表2は、正規化され、少数位1/100の単位で四捨五入された表1の抵抗力を示す。正規化は、様々な時点(表1に示されるような)で実施例の未加工(raw)の抵抗力値を取り、試料の幅で割ることによって行われてもよい。抵抗力値は、誤差がプラス又はマイナス0.05Nまでと見なされる。結果として、1秒の時点における実施例1の負の抵抗力値は、信号対雑音のアーチファクトであると考えられ、測定の精度を前提とすると、1秒の時点で抵抗力がないことに相当し得る。同様に、1秒の時点における実施例2の抵抗力値も抵抗力がないことに相当し得る。表1のデータから分かるように、本発明(実施例1〜2)は、抵抗力が徐々に増えて、180秒の時点で測定したときに最大抵抗力に達する回復を示す。比較例(実施例3〜8)は、抵抗力値が測定サイクルの開始時において高く、15〜30秒後に僅かに増加することを示す。
Claims (6)
- 着用者に対面する面および衣類に対面する面と、長手方向中心線および横方向中心線と、前側腰部区域、後側腰部区域、並びに前記前側腰部区域および前記後側腰部区域の間に設けられた股部区域と、を有する使い捨てプルオンおむつであって、
前記前側腰部区域および後側腰部区域が接合されて、腰部開口部および脚部開口部を形成し、
吸収性アセンブリと、弾性ベルトと、を含み、
前記吸収性アセンブリは、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、前記トップシートおよびバックシートの間に設けられた吸収性コアと、を含み、
前記弾性ベルトは、解放率試験によって測定したとき15秒後で最大抵抗力の80%未満、好ましくは解放率試験によって測定したとき15秒後で最大抵抗力の50%未満、最も好ましくは解放率試験によって測定したとき15秒後で最大抵抗力の20%未満を示す、使い捨てプルオンおむつ。 - 前記弾性ベルトは、解放率試験によって測定したとき45秒後で最大抵抗力の90%未満、好ましくは解放率試験によって測定したとき45秒後で最大抵抗力の70%未満、最も好ましくは解放率試験によって測定したとき45秒後で最大抵抗力の55%未満を示す、請求項1に記載の使い捨てプルオンおむつ。
- 前記弾性ベルトが、少なくとも0.1秒、好ましくは少なくとも1秒、より好ましくは少なくとも5秒、最も好ましくは少なくとも10秒の30%回復時間を更に示す、請求項1に記載の使い捨てプルオンおむつ。
- 前記弾性ベルトは、508mm/分未満の回復速度を示す、請求項1に記載の使い捨てプルオンおむつ。
- 前記弾性ベルトは、解放率試験によって測定したとき、少なくとも約0.15N/cmの正規化された最大抵抗力を更に示す、請求項1に記載の使い捨てプルオンおむつ。
- 前記弾性ベルトは、解放率試験によって測定したとき180秒後で少なくとも約30%の解放、好ましくは解放率試験によって測定したとき180秒後で少なくとも約60%の解放、最も好ましくは解放率試験によって測定したとき180秒後で少なくとも約90%の解放を更に示す、請求項1に記載の使い捨てプルオンおむつ。
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| JP (1) | JP4611390B2 (ja) |
| CN (1) | CN101106962B (ja) |
| AT (1) | ATE539723T1 (ja) |
| CA (1) | CA2620260A1 (ja) |
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- 2006-01-11 JP JP2007553118A patent/JP4611390B2/ja not_active Expired - Fee Related
- 2006-01-11 CA CA002620260A patent/CA2620260A1/en not_active Abandoned
- 2006-01-11 CN CN2006800032881A patent/CN101106962B/zh not_active Expired - Fee Related
- 2006-01-11 WO PCT/US2006/000811 patent/WO2006081068A1/en not_active Ceased
- 2006-01-11 EP EP06717947A patent/EP1843728B1/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| CA2620260A1 (en) | 2006-08-03 |
| CN101106962A (zh) | 2008-01-16 |
| US8029488B2 (en) | 2011-10-04 |
| JP4611390B2 (ja) | 2011-01-12 |
| MX2007008590A (es) | 2007-08-14 |
| WO2006081068A1 (en) | 2006-08-03 |
| EP1843728B1 (en) | 2012-01-04 |
| CN101106962B (zh) | 2010-12-08 |
| EP1843728A1 (en) | 2007-10-17 |
| US20060167434A1 (en) | 2006-07-27 |
| ATE539723T1 (de) | 2012-01-15 |
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