JP5107450B2 - 緩慢回復型伸張性積層体を含む吸収性物品 - Google Patents
緩慢回復型伸張性積層体を含む吸収性物品 Download PDFInfo
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Description
伸張後の回復
この方法は、伸張性積層体の伸張後のひずみを、温度及び時間の関数として決定するために使用される。測定は、22℃(72°F)又は32℃(90°F)にて実施される。22℃(72°F)における測定は、室温における伸張性積層体の回復を模擬するために計画され、一方、32℃(90°F)における測定は、皮膚温度近くの伸張性積層体の回復を測定するために計画される。伸張及び回復の2段階分析が、サンプルに対して実施される。本方法は、動的機械的分析器(Dynamic Mechanical Analyzer)を使用する。デラウエア州ニューキャッスル(New Castle, Delaware)のTAインスツルメンツ社(TA Instruments, Inc.)から入手可能なTAインスツルメンツDMA2980(以降では「DMA2980」)が本明細書で使用され、これは、フィルムクランプ、データ獲得のためのサーマルアドバンテージ(Thermal Advantage)/サーマルソリューションズ(Thermal Solutions)ソフトウエア、及びデータ分析のためのユニバーサルアナリシス(Universal Analysis)2000ソフトウエアを装備していた。多数の他のタイプのDMA装置が存在しており、動的機械的分析の使用は、ポリマー及びコポリマーの特性決定技術の当業者には周知である。
当初パーセントひずみ=%ひずみi=100×((Ls−Lg)/Lg)
上式において、Lgは、弛緩状態のギャザーが有る伸張性積層体の長さであり、Lsは、分析伸張段階の最終時のフィルムクランプ間の伸張性積層体の長さである(約30mm)。%ひずみiは、回復方法の開始時の(すなわち、方法の伸張パート完了後の)伸張性積層体のパーセントひずみである。ゲージ長さ10mmから長さ30mmに伸張されたサンプルでは、200%のパーセントひずみという結果になる。
この方法は、緩慢回復型伸張性積層体を有する製品を適用する間に消費者が経験する力に関して、並びに製品が一旦適用されてからどのようにフィットして機能するかに関して、相互関係を有し得る特性を決定するために使用される。
(1)指定された当初パーセントひずみ(すなわち、ひずみi=150%)まで、保持無しで0.85cm/s(50.8cm/min(20インチ/min))の一定クロスヘッド速度で、サンプルにひずみを与える。
(2)保持無しで0.13cm/s(7.62cm/min(3インチ/min))の一定クロスヘッド速度で、0%ひずみまでひずみを減少する(すなわち、グリップを元のゲージ長さ6.4cm(2.50インチ)までもどす)。
(3)保持無しで0.85cm/s(50.8cm/min(20インチ/min))の一定クロスヘッド速度で、ひずみiまでサンプルにひずみを与える。
(4)一定クロスヘッド速度0.13cm/s(7.62cm/min(3インチ/min))で、60%ひずみまでひずみを減少する。
(5)サンプルを60%ひずみに5分間保持する。
(6)一定クロスヘッド速度0.13cm/s(7.62cm/min(3インチ/min))で、0%ひずみにする。
(1)伸張性積層体に使用するエラストマーフィルムの幅、長さ、厚さ、及び重量を測定する。フィルムの各端部にテープを付着して、テープ間のフィルム長さが5cmであるようにする。
(2)第一の不織布(幅2.54cm×長さ30cm)を板の上に置いて、各端部をテープで留め、積層体を板の上で平らに保持する。不織布のテープ間の当初長さ(Linw)は、25mm長である。
(3)接着剤のストリップ(すなわち、剥離紙の2.25cm×28cmのシートの片面に螺旋模様で塗布された18.6gsmの接着剤)を不織布の上に中心をとって置く。接着剤を不織布に固着させるために、HR−100ローラ(ASTM、2kg、ショア80のゴム付き)を使用して、2完全ストロークで圧力をかける。剥離紙を取り除く。
(4)エラストマーフィルム(未伸張幅2cm×テープ間長さ5cm)を不織布のテープ間の当初長さ(25cm)に伸張して、接着剤/不織布の上に中心をとっておく。緩慢回復型弾性体は、400%ひずみに伸張されている(5cmから25cm)。
(5)伸張されたエラストマーフィルムの上に中心をとって、工程(3)で説明したものに類似の接着剤ストリップを置く。圧力をかけて(HR−100、2完全ストローク)固着し、剥離紙を取り除く。工程3及び5で使用された2枚のストリップの接着剤螺旋は、約0.21グラムの接着剤を伸張性積層体に追加する。完全に伸ばされた緩慢回復型伸張性積層体の面積(AFESL)は、0.00635m2(テープ間長さ25cm×幅2.54cm)である。
(6)積層体の上に中心をとって、第二の不織布(幅2.54cm×テープ間長さ25cm)を置く。ローラで圧力をかけて(HR−100、10完全ストローク)積層体を結合する。
(7)積層構造体を板から取り外して、室温で一晩、又は37℃で30分間、静止させる。ギャザーが寄った積層体のテープ間の最終長さを、伸張することなく測定する。不織布の元の長さを超えることなく伸張させる間に、積層体に利用可能な最大パーセントひずみ(最大%ひずみ)を、次式を使用して計算する:
最大%ひずみ=100×((Linw−Lg)/Lg)
上式において、Lgは、伸張性積層体のギャザーが寄った長さであり、Linwは、不織布の当初長さである。表2中の伸張性積層体1A、2A、3A、及び4Aは、400%ひずみに伸張されたエラストマー組成物(表1)のフィルムで調製されたものであり、これらの伸張性積層体は、最大パーセントひずみ>=200%である。エラストマーフィルムの特性(例えば坪量及び弾性率)、並びに伸張性積層体調製中のエラストマーフィルムのパーセントひずみは、仕上り積層体のギャザーの程度に影響を及ぼす。表2中の伸張性積層体2B、2C、3B、及び3Cは、240%ひずみに伸張された(2B、3B)、又は200%ひずみに伸張された(2C、3C)エラストマー組成物(表1)のフィルムで調製されたものである。これらの伸張性積層体についての最大パーセントひずみと伸張後回復試験にて用いられる当初パーセントひずみとが、表2に示される。
当初ひずみに対して残っている割合=100×[時間(t)における%ひずみ/当初%ひずみ]
Claims (7)
- 吸収性物品であって、
a)トップシートと、
b)前記トップシートに結合されたバックシートと
c)前記トップシートとバックシートとの間に入れられた吸収性コアと、
を含み、前記吸収性物品が、
d)肛門カフ、伸縮性トップシート、締着装置、レッグカフ、腰部弾性機構、サイドパネル、耳、及びこれらの組み合わせから成る群から選択される物品要素を更に含んで、
前記物品要素が、37℃において0.16N/(g/m)以上の荷重除去力と、22℃にて15秒後に、当初ひずみに対する割合が30%以上の回復を示す緩慢回復型伸張性積層体を含み、
前記緩慢回復型伸張性積層体が、
a)第一の表面及び第二の表面を有する少なくとも第一の基材と、
b)前記基材の前記第一の表面に接着剤を介して接合された少なくとも1つの弾性部材と、を含み、
前記弾性部材がスチレン−イソプレン−スチレンブロックコポリマーからなる吸収物品。 - 吸収性物品であって、
a)トップシートと、
b)前記トップシートに結合されたバックシートと
c)前記トップシートとバックシートとの間に入れられた吸収性コアと、
を含み、前記吸収性物品が、
d)肛門カフ、伸縮性トップシート、締着装置、レッグカフ、腰部弾性機構、サイドパネル、耳、及びこれらの組み合わせから成る群から選択される物品要素を更に含んで、
前記物品要素が、37℃において0.16N/(g/m)以上の荷重除去力と、22℃にて15秒後に、当初ひずみに対する割合が30%以上の回復を示す緩慢回復型伸張性積層体を含み、
前記緩慢回復型伸張性積層体が、
a)第一の表面及び第二の表面を有する少なくとも第一の基材と、
b)前記基材の前記第一の表面に接着剤を介して接合された少なくとも1つの弾性部材と、を含み、
前記弾性部材が、スチレン−イソプレン−スチレントリブロックコポリマー、好ましくはポリ(t−ブチルスチレン)および油類からなる吸収性物品。 - 前記緩慢回復型伸張性積層体が、32℃にて15秒後に当初ひずみに対して、ある割合の回復を示すものであり、22℃にて15秒後の回復の当初ひずみに対する割合と32℃にて15秒後の回復の当初ひずみに対する割合との差が、5%以上である、請求項1又は2に記載の吸収性物品。
- 前記緩慢回復型伸張性積層体が、第一の表面及び第二の表面を有する第二の基材を更に含み、前記弾性部材が、前記第一の基材と前記第二の基材との間に配置されるように、前記第二の基材の前記第一の表面に接合される、請求項1又は2に記載の吸収性物品。
- 前記弾性部材が、フィルム、ストランド、バンド、網状線配置、発泡体、及びこれらの組み合わせから成る群から選択される形体である、請求項1〜4のいずれか1項に記載の吸収性物品。
- 前記第一の基材が、不織布ウェブ、織布ウェブ、編み布地、フィルム、フィルムラミネート、孔あきフィルム、不織布ラミネート、スポンジ、発泡体、スクリム、及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1〜5のいずれか1項に記載の吸収性物品。
- 前記吸収性物品が、おむつ、トレーニングパンツ、プルオン衣料、再締着可能なパンツ、成人用失禁製品、又は女性ケア製品を含む群から選択される、請求項1〜6のいずれか1項に記載の吸収性物品。
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US64392005P | 2005-01-10 | 2005-01-10 | |
US60/643,920 | 2005-01-10 | ||
US11/144,497 | 2005-06-03 | ||
US11/144,497 US7905872B2 (en) | 2004-06-04 | 2005-06-03 | Absorbent articles comprising a slow recovery stretch laminate |
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JP2011090175A Expired - Fee Related JP5107450B2 (ja) | 2005-01-10 | 2011-04-14 | 緩慢回復型伸張性積層体を含む吸収性物品 |
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JP (2) | JP2008526358A (ja) |
AR (1) | AR054323A1 (ja) |
CA (1) | CA2593596C (ja) |
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-
2005
- 2005-06-03 US US11/144,497 patent/US7905872B2/en not_active Expired - Fee Related
- 2005-08-26 JP JP2007550354A patent/JP2008526358A/ja active Pending
- 2005-08-26 CA CA2593596A patent/CA2593596C/en not_active Expired - Fee Related
- 2005-08-26 WO PCT/US2005/030415 patent/WO2006076052A1/en active Application Filing
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CA2593596A1 (en) | 2006-07-20 |
EP1835874A1 (en) | 2007-09-26 |
CA2593596C (en) | 2011-10-25 |
US7905872B2 (en) | 2011-03-15 |
JP2008526358A (ja) | 2008-07-24 |
AR054323A1 (es) | 2007-06-20 |
JP2011156388A (ja) | 2011-08-18 |
MX2007007995A (es) | 2007-10-10 |
WO2006076052A1 (en) | 2006-07-20 |
US20050273071A1 (en) | 2005-12-08 |
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