JP2014221549A - 強く配向した成分繊維から形成された不織布層を含む弾性ラミネートおよびそれを用いる使い捨て着衣 - Google Patents
強く配向した成分繊維から形成された不織布層を含む弾性ラミネートおよびそれを用いる使い捨て着衣 Download PDFInfo
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Abstract
Description
前述に基づいて、その弾性的「ストレッチネス」を減少させない弾性的ラミネートを用いる使い捨て着衣についての必要もまた存在する。
本発明は、ここで用いられるエラストマー材料に制限を有さない弾性ラミネートに関する。本発明のその及び他の長所は本明細書でより詳細に記載される。
本発明の第1の不織布層122は、互いに結合する成分繊維から形成される。その成分繊維は、主たる繊維方向を有する。第1の不織布層122は、少なくとも約65%、より好ましくは少なくとも約75%、さらにより好ましくは少なくとも約85%の主たる繊維方向から±約20度の範囲の繊維配向比(FOR20)を有する。より好ましい態様において、第1の不織布層122は、加えて、少なくとも約45%、より好ましくは少なくとも約60%、さらにより好ましくは少なくとも約70%の主たる繊維方向から±約10度の範囲の繊維配向比(FOR10)を有する。
(式中、 TS1(gf/インチ)は、主たる繊維方向における破壊点における引っ張り強度(TS)であり、 TS2(gf/インチ)は、主たる繊維方向に対して垂直である垂直方向における破壊点における引っ張り強度(TS)である)
により定義される。
エラストマー層124は、広範な大きさ、形状および形態で形成されうる。好ましい態様において、エラストマー層124は、たとえば、図1において示されえるような連続平面層の形態で存在する。連続平面層の好ましい形態には、スクリム、穿孔された(すなわち開孔形成された)フィルム、エラストマー織布もしくは不織布などが含まれる。好ましくは、エラストマー層124は、約0.05mmから約1mm(約0.002インチ〜約0.039インチ)の厚さを有する。連続平面層は、製品において適切に付与されうるいずれの形態もとりうる。連続平面層の好ましい形態には、長方形および正方形、台形を含む四角形および他の多角形が含まれる。別態様において、エラストマー層124は、互いに付着していない別々のストランド(またはストリング)の形態で存在する。
本発明の第1の不織布層122は、当該技術において公知のいずれかの手段によりエラストマー層124に結合しうる。好ましい態様において、第1の不織布層122は、当該技術において周知のもののような接着剤手段によりエラストマー層124の第1の表面150に結合する。たとえば、第1の不織布層122は、接着剤の均一連続層、接着剤のパターン化された層、または接着剤の線または点の配列によりエラストマー層124の第1の表面150に固定されうる。接着剤手段により形成される1つの好ましいラミネート構造は、図2において示されている。
1.繊維の配向についての試験方法 以下の方法は、好ましくは、不織布材料の繊維配向比(FOR)を定量するために用いられる。
FOR10=NF10/TNF×100 (2)
(式中、 NF10は、主たる繊維方向から±約10度以内の配向角度を有する繊維の数であり、 TNFは、3つの異なる正方形領域の中で測定された繊維の総数である)
により定量される。
FOR20=NF20/TNF×100 (3)
(式中、 NF20は、主たる繊維方向から±約20度以内の配向角度を有する繊維の数である)により定量される。
本明細書では、「プル・オン着衣」とは、規定された腰部の開口および1対の脚部の開口を有し、脚を脚部の開口に挿入し、腰まで製品を引き上げることにより着用者の身体に引かれる着用製品を称する。本明細書では、「使い捨て」とは、洗濯されるかまたはさもなければ着衣として修復されるかまたは再使用されることが意図されない着衣を記述する(すなわち、それは、1回の使用の後に廃棄され、好ましくは、リサイクルされ、堆肥化され、またはさもなければ、環境に適合する方法で処理されることが意図される)。「一体的」プル・オン着衣とは、調和した全体(coordinated entity)を形成するように互いに一体化された分離した部品で形成されているプル・オン着衣を称するが、しかし、イヤーパネルは分離したシャーシに結合する分離した要素ではなく、むしろ、イヤーパネルは、着衣のシャーシもまた形成する少なくとも1層により形成されている(すなわち、着衣は、分離したシャーシおよび分離したイヤーパネルのような別になっている手で取り扱うパネルを必要としない)。プル・オン着衣はまた、好ましくは、身体から排出されるさまざまの滲出物を吸収し、含有するように「吸収性」でもある。本発明のプル・オン着衣の好ましい態様は、一体的使い捨て吸収性プル・オン着衣、図6において示されるプル・オン着衣120である。本明細書で、「プル・オンおむつ」とは、尿および便を吸収し、含有するために幼児および他の失禁者により一般的に着用されるプル・オン着衣を称する。しかしながら、本発明はまた、トレーニングパンツ、失禁ブリーフ、女性用衛生着衣またはパンティなどのような他のプル・オン着衣にも適用可能であることも理解されるべきである。本明細書では、「パネル」とは、プル・オン着衣の領域または要素をあらわす。(パネルは典型的には別の領域または要素であるけれども、パネルは、隣接するパネルと幾分か重なり(機能的に一致し)うる。)本明細書では、「収縮していない状態」とは、用いられているすべての弾性材料がそこから除去されているその縫合されていない(すなわち縫合が除かれている)、平坦な、そして弛緩した状態におけるプル・オン着衣の状態を記載するためにここでは用いられている。
弾性ラミネート70は、図9において示される接着剤76により液体不透過性フィルム(すなわち、液体不透過性フィルム68)のそれぞれのエッジ78に好ましくは結合し、より好ましくは直接固定される。好ましい態様において、液体不透過性フィルム68は、前方、後方およびクロッチ領域26、28および30において縦に伸びるけれども、それは、伸長性イヤーパネル45、46および48の少なくとも1つ、好ましくはそれぞれに横には伸びない。より好ましい態様において、弾性ラミネート70は、図9において示される外側に面する表面77で液体不透過性フィルム68のそれぞれのエッジ78に結合する。別態様において、弾性ラミネート70は、(図において示されていない)身体に面する表面79で液体不透過性フィルム68のそれぞれのエッジ78に結合しうる。好ましくは、接着剤76は、螺旋のり付けパターンで付与される。好ましい態様において、接着剤76は、非晶質成分と結晶化する成分を有する可撓性接着剤である。そのような好ましい接着剤は、名称H2085Fの下で日本の大阪のニッタ・フィンドレー株式会社により作られている。代わりに、弾性ラミネート70は、熱結合、圧力結合、超音波結合、動的機械的結合、またはそれらの接着手段の組み合わせを含む当該技術において公知のいずれか他の結合手段により液体不透過性フィルム68のそれぞれのエッジ78に結合しうる。
Claims (17)
- 少なくとも1方向に弾性的に伸長性のある弾性ラミネートであって、
(a)開孔を有する平面層を含んでなるエラストマー層と、
(b)前記エラストマー層に結合する第1の不織布層であって、前記第1の不織布層が、主たる繊維方向を有する成分繊維から形成されてなる、不織布層とを備えてなり、
前記第1の不織布層が、少なくとも約65%の主たる繊維方向から約±20度の範囲の繊維配向比を有してなり、
前記弾性ラミネートが第1の接着剤を含んでなり、前記第1の接着剤が非晶質成分を含んでなることを特徴とする、弾性ラミネート。 - 前記第1の不織布層が少なくとも15の引っ張り強度比を有する、請求項1記載の弾性ラミネート。
- 前記第1の不織布層が30%伸長の際200gf/インチ(80gf/cm)未満の応力を有する、請求項1記載の弾性ラミネート。
- 前記第1の不織布層が、少なくとも45%の主たる繊維方向から±10度の範囲の繊維配向比を有する請求項1記載の弾性ラミネート。
- 前記第1の不織布層が60g/m2 未満の坪量を有する請求項1記載の弾性ラミネート。
- 前記エラストマー層に結合する第2の不織布層をさらに備えてなる、請求項1記載の弾性ラミネート。
- 前記第1の不織布層が合成連続繊維から作られてなる、請求項1に記載の弾性ラミネート。
- 前記合成連続繊維がポリオレフィンまたはポリエステルから作られている請求項7記載の弾性ラミネート。
- 前記合成連続繊維がバイコンポーネント繊維である、請求項7に記載の弾性ラミネート。
- 前方領域と、後方領域と、及び前記前方領域と前記後方領域との間のクロッチ領域を有する使い捨て着衣であって、
前記前方領域と、前記後方領域と、及び前記クロッチ領域を備えてなり、前記前方領域および前記後方領域にエッジラインを有してなるシャーシと、及び
前記シャーシが、液体透過性トップシートと、トップシートと結合する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る吸収性コアとを備えてなるものであり、
前記前方領域又は前記後方領域において前記シャーシから横に外側に伸びる少なくとも一対の伸長性サイドパネルとを備えてなり、
前記サイドパネルの少なくとも一つが、少なくとも横方向に弾性的に伸長性の弾性ラミネートを含んでなるものであり、
前記弾性ラミネートが、
(a)開孔を有する平面層を含んでなるエラストマー層と、
(b)前記エラストマー層に結合する第1の不織布層とを備えてなり、
前記第1の不織布層が、主たる繊維方向を有する成分繊維から形成されてなり、
前記第1の不織布層が、少なくとも約65%の主たる繊維方向から±約20度の範囲の繊維配向比を有してなり、
前記弾性ラミネートが第1の接着剤を含んでなり、前記第1の接着剤が非晶質成分を含んでなることを特徴とする、使い捨て着衣。 - 前記シャーシを前記サイドパネルに結合させ、二つの脚部の開口と、及び腰部の開口を形成させるシームをさらに備えてなる、請求項10に記載の使い捨て着衣。
- 前記少なくとも一対のサイドパネルが、前記前方領域におけるシャーシから横に外側に伸びる一対の伸長性フロントサイドパネルと、及び
前記後方領域におけるシャーシから横に外側に伸びる一対の伸長性バックサイドパネルを備えてなり、
前記使い捨て着衣が、前記フロントサイドパネルと前記バックサイドパネルをそれぞれ結合させ、二つの前記脚部開口と、及び前記腰部開口を形成させるシームをさらに備えてなる、請求項10に記載の使い捨て着衣。 - 前記第1の不織布層が少なくとも15の引っ張り強度比を有する、請求項10に記載の使い捨て着衣。
- 前記第1の不織布層が30%伸長において200gf/インチ(80gf/cm)未満の応力を有する、請求項10に記載の使い捨て着衣。
- 前記第1の不織布層が、少なくとも45%の主たる繊維方向から±10度の範囲の繊維配向比を有する、請求項10に記載の使い捨て着衣。
- 前記エラストマー層に結合する前記第2の不織布層をさらに備えてなる、請求項10に記載の使い捨て着衣。
- 前記第1の不織布層がポリオレフィン又はポリエステルから作られている合成連続繊維から形成されてなる、請求項10に記載の使い捨て着衣。
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Also Published As
Publication number | Publication date |
---|---|
EP1117530B1 (en) | 2005-11-16 |
AU6403199A (en) | 2000-04-26 |
JP2003524533A (ja) | 2003-08-19 |
DE69928420T2 (de) | 2006-07-13 |
WO2000020206A9 (en) | 2001-11-22 |
JP5925412B2 (ja) | 2016-05-25 |
US6878647B1 (en) | 2005-04-12 |
PE20001001A1 (es) | 2000-12-03 |
JP2010280218A (ja) | 2010-12-16 |
WO2000020206A1 (en) | 2000-04-13 |
DE69928420D1 (de) | 2005-12-22 |
EP1117530A1 (en) | 2001-07-25 |
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