JP5602872B2 - 湿り度インジケータを備える吸収性物品 - Google Patents
湿り度インジケータを備える吸収性物品 Download PDFInfo
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- JP5602872B2 JP5602872B2 JP2012542237A JP2012542237A JP5602872B2 JP 5602872 B2 JP5602872 B2 JP 5602872B2 JP 2012542237 A JP2012542237 A JP 2012542237A JP 2012542237 A JP2012542237 A JP 2012542237A JP 5602872 B2 JP5602872 B2 JP 5602872B2
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Description
本明細書において記載される湿り度インジケータは、着色剤、マトリックス、安定剤、及び任意の追加的な成分を含む組成物の形態で提供され得る。本発明の湿り度インジケータ組成物は、吸収性物品の構造要素に適用され得る。基材、使い捨て吸収性物品、及びその構造要素は、本明細書において詳述される。理論により制限されることなく、開示される湿り度インジケータは、実質的にセルロースを含まない吸収性コア(例えば、その吸収性の実質的に全部において超吸収性ポリマーを使用する吸収性コア)を有するおむつ及びパンツなどの吸収性物品で使用するために特に好適であると考えられる。
いくつかの実施形態において、湿り度インジケータは着色剤を含む。着色剤は、第1湿り度インジケータ状態(例えば、乾燥)に関連する第1色状態を有し得る。第1色状態の例としては、人間の目に可視である色、例えば、赤色、青色、緑色、藍色、菫色、黄色、オレンジ色、紫色など;人間の裸眼には典型的には可視でない電磁放射線、例えば、紫外線(「UV」)又は赤外線(「IR」)などが挙げられるが、これらに限定されない。最初の色の状態は、目に見えない色、白色、黒色、半透明、又は不透明であってよい。着色剤はまた、第2の湿り度インジケータ状態(例えば、湿潤)と関連する第2色状態を有する。第2色状態の例としては、人間の目に可視である色、例えば、赤色、青色、緑色、藍色、菫色、黄色、オレンジ色、紫色など;人間の裸眼には典型的には可視でない電磁放射線、例えば、UV又はIRなどが挙げられるが、これらに限定されない。第2色状態は、目に見えない色、白色、黒色、半透明、不透明であってよく、又は第1色状態と比較した場合、強度又は視覚弁別性における変化を有する。着色剤の第1色状態は、いくつかの形態において、第2色状態とは異なる。例えば、第1色状態が黄色などの第1の色であってもよく、一方で第2色状態が青色などの異なる色であってもよく、又は第1色状態は青色などの第1の色であってもよく、一方で第2色状態は透明であり、及び/若しくは一般的には人間の裸眼には可視でない電磁放射線の波長であり得る。
いくつかの実施形態において、湿り度インジケータ組成物はマトリックスを含み得る。マトリックスは一般的に、液体との接触の前、間、及び/又は後に着色剤を適所に保持するように機能する。マトリックスは望ましくは、特に高湿環境において、滲出、及び、早すぎる活性化に抵抗する着色剤を提供する。特定の組成物(例えば、尿、糞便物質、経血又は血液)との接触との際に、マトリックスは望ましくは外観の変化を生じるために十分な液体が着色剤と接触することを可能にするが、着色剤が、その第1色状態又は第2色状態のいずれにおいても湿り度インジケータから周囲環境へと(例えば、使い捨て吸収性物品の吸収性コアへと)滲出することを阻止する。
マトリックスは、1種類以上のいわゆる粘着付与剤を含み得る。粘着付与剤は、接着剤の粘着性を増加させる(すなわち、接着剤が接触の際に、表面又は組成物との結合を形成する能力を促進する)組成物として、接着剤分野において既知である。粘着付与剤の非限定的な例としては、ロジン、ロジンエステル、重合化ロジン、ペンタエリスリトールロジンエステル、スチレン化テルペン、ポリテルペン樹脂、テルペンフェノール樹脂、及び、これらの組み合わせを含む。ロジンの特に好適な例としては、Arizona ChemicalのSYLVATAC RE98商標のロジンエステルが挙げられ、これは、Eastman Chemical Company(Kingsport,Tennessee)により製品コードForal AX−Eで販売されるペンタエリスリトールロジンエステル又は水素添加ロジンである。
マトリックスは、1つ以上の水溶性若しくは水分散性ポリマー又は化学物質を含み得る。水溶性及び/若しくは水分散性ポリマー又は化学物質は、着色剤がその第2色状態にあるときに、着色剤の不動化を補助するように選択され得る。湿り度インジケータ組成物で使用するための、水溶性及び/又は水分散性ポリマー又は化学物質の非限定的な例は、米国特許第6,904,865号(Klofta)に見出され得る。水溶性及び/又は水分散性ポリマー又は化学物質の他の非限定的な例としては、第四級アンモニウム塩化合物、カチオン性粘土、ポリアクリル酸ポリマー、有機酸、及び、これらの組み合わせが挙げられる。好適な第四級アンモニウム化合物の例としては、ジメチル(2−エチルヘキシル水素化タローアルキル)アンモニウムメチルサルフェート、ココアルキルメチル[エトキシ化(15)]アンモニウムクロライド、ドデシルトリメチルアンモニウムクロライド、ヘキサデシルトリメチルアンモニウムメチルサルフェート、オクタデシルトリメチルアンモニウムクロライド、ジココアルキルジメチルアンモニウムクロライド(dicocoalkyldimethly ammonium chloride)、ジ(水素化タローアルキル)ジメチルアンモニウムクロライド、及びジステアリルジメチルアンモニウムクロライドが挙げられるが、これらに限定されない。第四級アンモニウム化合物若しくは1つ以上のカチオン性基を有する他の水分散性ポリマー、又は化学物質と関連する対アニオンは、特に塩素に限定されないことに留意すべきである。他のアニオンも用いることができ、非限定例としてはメチルサルフェート及び亜硝酸塩が挙げられる。同様に、例えば、ナトリウム、カリウム、マグネシウム、亜鉛、プロトン、アンモニウム、置換アンモニウムなどに限定されない任意の好適な対カチオンが、1つ以上のアニオン基を有する水分散性ポリマー又は化学物質と関連し得る。
本明細書において使用するための好適な湿り度インジケータは、時期尚早に活性化される(すなわち、第1湿り度インジケータ状態から第2湿り度インジケータ状態への変化を指示する)べきではない。したがって、着色剤がpHインジケータであり、吸収性物品が高湿及び高温条件下において、並びに/又はpHを変える組成物(例えば、超吸収性ポリマー)に近接して保管され得る場合、安定剤を含むことが望ましい場合がある。湿り度インジケータ組成物内に安定剤を含めることは、湿り度インジケータ組成物内の着色剤の変色を時期尚早に活性化する可能性があり得る材料、及び/又は化学物質が存在する新しいおむつ設計(例えば、ほとんど全体的に吸収性ポリマーから作製された吸収性コアを有するおむつ)にとって特に重要であり得る。
本発明の1つの任意による実施形態において、湿り度インジケータ組成物は、界面活性剤、構造補助剤、レオロジー変性剤(例えば、粘度変性剤)及び、これらの組み合わせが挙げられるがこれらに限定されない任意の成分を含み得る。任意の追加成分は、存在する場合には、典型的には、組成物の約0.001重量%〜約50重量%、約0.1重量%〜約40重量%、及び約1重量%〜約35重量%などの任意の追加成分の利点をもたらすのに有効な濃度で組成物中に用いられる。米国特許第6,904,865号(Kloftaら、2005年6月14日発行)に開示された任意成分及び量は、本発明の湿り度インジケータ組成物で用いられてよい。
湿り度インジケータ組成物は、基材の上及び/又は中に配置され得る。基材上に存在する場合、水、尿、経血、血液などの液体と接触する可能性がある基材の一部の上及び/又は中に湿り度インジケータ組成物を位置付けることが望ましい場合がある。基材には、織布、不織布、フィルム、スポンジ、及び、これらの組み合わせが挙げられるが、これらに限定されない。基材は、合成材料及び/又は天然材料を含んでよい。いくつかの実施形態において、基材はそれ自体で物品である場合がある(例えば、連続的な不織布)。いくつかの実施形態において、基材は、個別に又は吸収性物品の1つ以上の構造要素としての他の要素(外側カバー、バックシート、トップシート、締結具、吸収性材料などが挙げられるがこれらに限定されない)と共に、構成され得る。1つの任意の実施形態において、湿り度インジケータ組成物は、吸収性物品全体に適用され得る。
A.制御温湿度(CTH)安定性試験の方法:
既製製品(例えば、小売店から購入されるおむつ)に関しては、試験する10個の製品を、本明細書において以下に記載されるように、温湿度制御(CTH)室内に配置する。手作りのサンプルに関しては、以下に概要を記載される全手順に従う。
CTH安定性試験で上述したように、湿り度インジケータが作製され(フィルムの形状である)、実質的にセルロースを含まないコアに適用されると、合成尿と接触した後で、湿り度インジケータが安定した乾燥状態の色から湿潤状態の色へと変化する速度を測定できる。ブロモクレゾールグリーンだけを含有する湿り度インジケータ組成物を含む湿り度インジケータでは、乾燥状態の色は黄色であり、湿潤状態の色は青色である。実質的にセルロースを含まないコアのダスティング層に適用される湿り度インジケータは、消費者に販売されるであろう湿り度インジケータの坪量、及び寸法の両方を模す必要がある。したがって、20gsm〜60gsmの坪量及び幅約5ミリメートル×長さ約160ミリメートルの湿り度インジケータが最適であろう。この湿り度インジケータは、その長辺がおむつの長辺に対して平行になるようにダスティング層に適用する必要がある。また、この湿り度インジケータは、おむつのコアの中心に沿うように、ダスティング層の外面に適用する必要がある。
2:重合ロジン(Arizona Chemical(Jacksonville,FL)からのSylvaros PR−295)
3:Crompton(Petrolia,PA)からのW835微晶性ろう
4:遊離酸型のセチルリン酸塩(ClariantからのHostaphat CC−100)
5:無水クエン酸(EMD)
6:Akzo Incorporated(Chicago,IL)からのココアルキルメチル[エトキシ化(15)]アンモニウムクロライド(ETHOQUAD C/25)
7:Akzo Incorporated(Chicago,IL)からのジメチル(2−エチルヘキシル水素化タローアルキル)アンモニウムメチルサルフェート(HTL8(W)−MS)
8:Curtiss Labs(Bensalem,PA)からのブロモクレゾールグリーン、遊離酸型
9:D&C Red #17(Sensient Inc.)
10:C20〜C40パレス−10(New Phase Incorporated(Sugar Land,TX)からのPerformathox 450)
11:CibaからのIRGANOX 1010FF商標の酸化防止剤
Claims (8)
- 吸収性コア、及び、不織布層に接合されたフィルム層を含むバックシートと、
前記フィルム層上に配置された湿り度インジケータと、を備え、
前記湿り度インジケータ組成物は安定剤、アニオン性着色剤及びマトリックスを含み、
前記安定剤は、遊離酸型のモノアルキルリン酸と、ステアリン酸、パルミチン酸、クエン酸、リンゴ酸、マレイン酸、乳酸、グリコール酸、グルコン酸、フマル酸、アジピン酸、アスコルビン酸、サリチル酸及びこれらの組み合わせからなる群から選択される有機酸と、を含み、
前記マトリックスは、粘着付与剤と、第四級アンモニウム塩化合物から選択される水溶性ポリマー及び水分散性ポリマーの少なくとも一方と、を含み、
前記粘着付与剤は、ロジン、ロジンエステル、重合ロジン、ペンタエリスリトールロジンエステル、スチレン化テルペン、ポリテルペン樹脂、テルペンフェノール樹脂、及び、これらの組み合わせ群から選択され、
前記吸収性コアは、吸収性ポリマー材料及び熱可塑性接着剤材料の複合物を含み、
前記吸収性コアは、実質的にセルロースを含まず、
前記湿り度インジケータは、CTH安定性試験に従って10日後に前記バックシートフィルム層を通じた可視の変色を呈さない、吸収性物品。 - 前記バックシートと前記吸収性コアとの間に配置されたダスティング層を更に含む、請求項1に記載の吸収性物品。
- 前記遊離酸型のモノアルキルリン酸安定剤は、モノステアリルリン酸、モノセチルリン酸、モノステアリルリン酸からなる群から選択される、請求項1または2に記載の吸収性物品。
- 前記有機酸安定剤は、クエン酸である、請求項1乃至3のいずれか一項に記載の吸収性物品。
- 前記着色剤が、ブロモクレゾールグリーン、ブロモクレゾールパープル、ブロモフェノールブルー、及び、これらの組み合わせからなる群から選択される、請求項1乃至4のいずれか一項に記載の吸収性物品。
- 前記バックシートが、5000g/m2/24時間を超え且つ23000g/m2/24時間未満の水蒸気透過率を有する、請求項1乃至5のいずれか一項に記載の吸収性物品。
- 前記バックシートが20g/m2未満の坪量を有する、請求項1乃至6のいずれか一項に記載の吸収性物品。
- 前記着色剤は、前記着色剤が第1色状態にあるときに、前記粘着付与剤によって不動化され、前記着色剤がその第2色状態にあるときに、水溶性ポリマー及び水分散性ポリマーの少なくとも一方によって不動化される、請求項1乃至7のいずれか一項に記載の吸収性物品。
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- 2010-12-06 CA CA2783162A patent/CA2783162A1/en not_active Abandoned
- 2010-12-06 WO PCT/US2010/059070 patent/WO2011071807A1/en active Application Filing
- 2010-12-06 EP EP10795510A patent/EP2509556A1/en not_active Withdrawn
- 2010-12-06 CN CN201080055427.1A patent/CN102647969B/zh active Active
- 2010-12-06 US US12/960,587 patent/US9956312B2/en active Active
- 2010-12-06 BR BR112012013842A patent/BR112012013842A2/pt not_active IP Right Cessation
Also Published As
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EP2509556A1 (en) | 2012-10-17 |
BR112012013842A2 (pt) | 2016-05-10 |
US20110137274A1 (en) | 2011-06-09 |
CN102647969A (zh) | 2012-08-22 |
JP2013512081A (ja) | 2013-04-11 |
CA2783162A1 (en) | 2011-06-16 |
US9956312B2 (en) | 2018-05-01 |
WO2011071807A1 (en) | 2011-06-16 |
CN102647969B (zh) | 2015-09-16 |
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