JP2022537787A - 耳部を有する吸収性物品 - Google Patents
耳部を有する吸収性物品 Download PDFInfo
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- JP2022537787A JP2022537787A JP2021576362A JP2021576362A JP2022537787A JP 2022537787 A JP2022537787 A JP 2022537787A JP 2021576362 A JP2021576362 A JP 2021576362A JP 2021576362 A JP2021576362 A JP 2021576362A JP 2022537787 A JP2022537787 A JP 2022537787A
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- JP
- Japan
- Prior art keywords
- absorbent article
- laminate
- bond
- region
- nonwoven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
図1に示されるように、積層体10は、第1の不織物12及びエラストマー層14を備える。種々の実施形態では、積層体は、第2の不織布16を備え、エラストマー層14は、第1の不織布と第2の不織布との間に挟持される。追加の層が含まれていてもよい(例えば、追加の不織布、非弾性材料、弾性又は延伸性材料等)。種々の実施形態では、積層体はエラストマー性である。1つ以上の積層体層は、図2に示すように、超音波結合部32を備えてもよい複数の分離結合部30によって接合される。超音波結合は、エラストマー層を介して不織布層を接合させてもよい。超音波結合された積層体は、本願と同一出願人による米国特許出願第62/374,010号、同第62/419,515号に開示されているプロセス及び/又は設備によって形成されてもよい。
本発明の積層体10は、使い捨て吸収性物品などの吸収性物品100に組み込まれてもよい。積層体は、シャーシ取り付け結合部102によってシャーシ120の1つ以上の層に取り付けられてもよい。シャーシ取り付け結合部は、超音波結合部、接着結合部、機械的結合部、又はこれらの組み合わせを含んでもよい。
トップシート124は、一般に、着用者に少なくとも部分的に接触する、又はより近位に配置されてもよい、吸収性物品100の一部である。好適なトップシート124は、多孔質発泡体、網状発泡体、有孔プラスチックフィルム、又は天然繊維(例えば、木材繊維若しくは綿繊維)、合成繊維(例えば、ポリエステル繊維若しくはポリプロピレン繊維)、又は天然繊維と合成繊維との組み合わせによる織布ウェブ又は不織布ウェブなどの、広範囲の材料から製造されてもよい。トップシート124は、一般に、着用者の肌に対してしなやかで柔らかい感触であり、非刺激性である。一般に、トップシート124の少なくとも一部は、液体透過性であり、液体をトップシート124の厚みを介して容易に透過させることができる。トップシート124は、有孔であってよい。トップシートは、米国特許第5,628,097号に開示されているように、材料をオーバーボンディングし、次にリングロールによってオーバーボンドを破断することによって有孔させてもよい。
吸収性コア128は、使い捨ておむつ及びその他の吸収性物品において一般に使用される多種多様の液体吸収性材料を含んでもよい。好適な吸収性材料の例としては、一般的に、エアフェルトクレープ紙綿と称される粉砕された木材パルプ、コフォームを含むメルトブローンポリマー、化学的に堅固化、改質、若しくは架橋されたセルロース繊維、薄紙の包装紙及び薄紙積層体を含む薄紙、吸収性発泡体、吸収性スポンジ、超吸収性ポリマー、吸収性ゲル化材料、又は任意のその他の吸収性材料若しくは材料の組み合わせが挙げられる。一実施形態では、吸収性コアの少なくとも一部は、実質的にセルロースを含まず、10重量%未満のセルロース繊維、5重量%未満のセルロース繊維、1重量%未満のセルロース繊維、微量のセルロース繊維を含有する、又はセルロース繊維を含有しない。微量のセルロース系材料は、実質的にセルロースを含まない吸収性コアの部分の薄さ、可撓性、及び吸収性のうちの少なくとも1つに実質的に影響を及ぼさないことを理解すべきである。その他の利点の中でも、吸収性コアの少なくとも一部が実質的にセルロースを含まない場合、吸収性コアのこの部分は、10重量%超のセルロース繊維を含む、同様の吸収性コアよりも著しく薄く、高い可撓性があると考えられる。吸収性コア中に存在する吸収性材料、例えば、吸収性粒子状ポリマー材料の量は、様々であってもよいが、特定の実施形態では、吸収性コアの約80重量%超、又は吸収性コアの約85重量%超、又は吸収性コアの約90重量%超、又はコアの約95重量%超の量で吸収性コア中に存在する。いくつかの実施形態では、吸収性コアは、1つ以上のチャネル129を備えてもよく、当該チャネルは、吸収性粒子状ポリマー材料を実質的に含まない。チャネル129は、長手方向又は横方向に延在してもよい。吸収性コアは、2つ以上のチャネルを更に備えてもよい。チャネルは、直線状であっても、曲線状であっても、角度をなしていても、これらの任意の機能可能な組み合わせであってもよい。非限定的な実施例では、長手方向軸線の周囲に、2つのチャネルが対称に配置される。
バックシート126は、一般に、吸収性物品100の表面に面する衣類の少なくとも一部となり得るように位置付けられる。バックシート126は、当業者に周知の任意の取り付け方法によって、トップシート124、吸収性コア128、及び/又は吸収性物品の任意のその他の層の一部に接合されてもよい。バックシート126は、吸収性物品100によって吸収され、その中に収容された排泄物が、ベッドシーツ及び下着などの、吸収性物品100と接触し得る物品を汚すのを防止するように設計されてもよい。特定の実施形態では、バックシート126は、実質的に不透水性である。バックシートは、例えば、約0.012mm~約0.051mmの厚さを有する熱可塑性フィルムのような薄いプラスチックフィルムとする、又はこれを含んでもよい。その他の適切なバックシート材料は、吸収性物品から蒸気を逃がすことを可能にする一方で、依然として、身体排泄物がバックシートを通過することを防止する、又は少なくとも抑制する通気性材料を含んでもよい。
吸収性物品100は、例えば、第1の腰部領域に配置された前方耳部132及び/又は第2の腰部領域に配置された後方耳134を含む、1つ以上の耳部130を含んでもよい。耳部130は、シャーシと一体であってもよく、耳部の1層以上をシャーシに接合し得るシャーシ取り付け結合部102においてシャーシ120に接合された別個の要素であってもよい。耳部130は、延伸性又は弾性であってもよい。耳部130は、1つ以上の不織布ウェブ、織布ウェブ、編布地、ポリマーフィルム及びエラストマー性フィルム、有孔フィルム、スポンジ、発泡体、スクリム、又はこれらのいずれかの組み合わせ及び/若しくは積層体から形成されてもよい。
吸収性物品100は、シャーシ120に取り付けられた脚部ガスケットシステム170を備えてもよく、脚部ガスケットシステムは、1つ以上のカフを備えてもよい。脚部ガスケットシステムは、一対のバリア脚部カフ172を備えてもよい。各バリア脚部カフは、吸収性物品に結合される一片の材料によって形成されてもよいため、吸収性物品の着用者に面する表面から上方向に延在することができ、また、着用者の胴体と脚部との接合部付近で流体及びその他の排泄物の改良された封じ込めをもたらし得る。バリア脚部カフは、トップシート124及び/又はバックシート126に直接又は間接的に接合された近位縁部と、着用者の皮膚に接触し、封止部を形成することを意図する自由端縁部175とによって、境界が定められる。いくつかの実施形態では、自由端縁部175は折り曲げられた縁部を備える。バリア脚部カフ172は、長手方向中心線105の両側において吸収性物品の前方腰部縁部113と後方腰部縁部119との間に少なくとも部分的に延在し、かつ股部領域内に少なくとも存在する。バリア脚部カフは、接着、溶融接合、又はその他の好適な接合処理の組合せによって行うことができる接合によって、近位縁部で物品のシャーシと接合されてもよい。
図6に示されるように、吸収性物品100は、改善されたフィット感及び封じ込めを提供するのに役立つ、少なくとも1つの弾性腰部機構180を備えてもよい。弾性腰部機構180は、一般的に、伸びて着用者の腰に動的にフィットすることが意図される。伸縮性腰部機構は、腰バンド、シャーシ120から取り外される腰部機構180の一部から形成されるポケットを有する腰部カフ、及び着用者の腹部の周囲にしっかりとフィットするように設計された腰部パネルを含む。伸縮性腰部機構の非限定的な実施例は、米国特許出願第13/490,543号、同第14/533,472号、及び同第62/134,622号に開示されている。腰部機構180は、第1の腰部領域114及び/又は第2の腰部領域118でシャーシ120に接合されてもよい。腰部機構は、着用者に物品を適切にフィットさせるための望ましい伸縮及び可撓性を提供するために、耳部130と併用され得る。腰部機構は、積層体に関して本明細書に記載された特徴のいずれかを有する積層体10を備えてもよい。腰部機構は、横方向及び/又は長手方向に延伸性又は弾性であってもよい。いくつかの実施形態では、腰部機構180は、ベルト220を備える。
いくつかの実施形態では、物品100は、図7A及び図7Bに示されるような吸収性パンツ200を含んでもよい。吸収性パンツは、シャーシ120、着用者の腰部の周囲に位置付けられるベルト220、及び所望により脚部ガスケットシステム170を備えてもよい。図7Bは、平らに広げられ、弾性誘導収縮に対して横方向に引き伸ばされた開放構成にある、図7Aのパンツの例示的な前身的構造を示す。パンツの最終アセンブリにおいて、前方ベルト部分222は、シーム224において、後方ベルト部分223に接合されるが、これは、恒久的であってもよい、又は再固定可能であってもよい。パンツ200を形成するため、前身的構造体を横方向中心線110で又はその周囲で折り畳み、トップシート124が内側に面するようにし、前方の222ベルト及び後方の223のベルト部分の長手方向縁部が、シーム224で接合され、脚部開口部、前方腰部縁部及び後方腰部縁部を有するパンツ構造体を形成してもよい。このように、パンツ200は、パンツ200の着用時に、着用者のために、あらかじめ形成された連続腰部開口部及びあらかじめ形成された連続脚部開口部を備えてもよい。
結合部寸法試験法
結合部寸法試験を使用して、種々の結合領域における積層体の結合密度を測定する。結合部寸法試験を、実体光学顕微鏡(Zeiss V20 Stereoscopeなど)及び取り付けカメラ(Carl ZeissAxio Cam MRc5など)を使用して生成される透過光顕微鏡画像で実施する。取得した場合に、画像内に配置された尺度に対して、較正されたImage Pro Plusソフトウェア(Version 7.0.0.591、Media Cybernetics、USA)におけるラインルール又は不規則領域ツールを使用して、測定を実施する。顕微鏡によって生成された尺度の精度を、画像及び測定値が取得される前に定規/キャリパーに照らして確認する。この方法の目的上、結合は、2層以上の意図的な接合であり、結合プロセス中に生じる変形した領域である(例えば、結合部位における低減されたキャリパー)。場合によっては、変形した領域は1つ以上の開口部を含む場合があると認識される。不織布が接合されていないエラストマー層内の引き裂き又は細長い裂け目は、結合部30がナブの形状に実質的に一致する一般に正方形の領域である図8に示されるように、結合と見なされない。図8の結合部の側面は、不織布が当該引き裂き内に結合されていないフィルム引き裂き300であるより明るい領域である。このような引き裂き領域300は、結合部又は結合の部分ではない。
1. 均一パターン領域:均一なパターンを有する結合領域の結合密度を測定するために、少なくとも1cm2の領域の正方形の試料を積層体のパターン化された結合領域から切り出す。異なる場合、隣接する領域から試料を収集することを避ける又はそれを測定するために、注意を払わなければならない。1cm2の正方形の試料収集サイズがパターン化された領域よりも大きい場合、1cm2の領域を有する長方形の試料を収集し、パターン化された領域のより短い寸法が長方形の一辺を形成し、他方は、長方形の領域が1cm2になるように選択される。
2. その他の領域:均一なパターンを有しない結合領域の結合密度を測定するために、対象となる複数の結合を特定し、図9のように得られる周辺部の輪郭を描く。周辺部に沿って切断することによって、試料を収集する。
3. 結合領域が識別できない程度に、3つの長手方向に延在する領域に耳部を分割してよい:第1の領域は、耳部の近位縁部と耳部の遠位縁部に最も近接するシャーシ結合の縁部との間の最大幅に対応する幅を有する。第2の領域は、遠位縁部と耳部の近位縁部に最も近接する締結具取り付け結合部の縁部との間の最大幅に対応する幅を有する。第3の領域は、第1の領域と第2の領域との間に延在する幅を有する。各領域は、それぞれの領域において耳部の長さに対して長手方向に延在し、それぞれの領域において耳部の長さが変化すると同じように長さが変化してもよい。
TestWorks4(登録商標)ソフトウェア又は同等のものを備えたMTSモデルAlliance RT/1などの、コンピュータと接続された適切な引張試験機が使用される。引張試験機は、22℃±2℃及び相対湿度50±10%の恒温室内に置かれる。製造業者の指示書に従って計器を較正する。データ取得速度は少なくとも50ヘルツに設定される。試験に使用される把持部は試料よりも幅が広い。幅50.8mmの把持部を使用してもよい。把持部は、全把持力を試験応力の方向に対して垂直な単一の線に沿って集中させるように設計された、1つの平坦面及び対向面を有する空気圧式の把持部であり、対向面からは、試料の滑りを最小限に抑えるための半円形(半径=6mm、例えばMTS Systems Corp.からの部品番号:56-163-827)が突出している、又は同等な把持部である。ロードセルは、測定される力が使用されるロードセルの容量の10%~90%であるように選択される。把捉力線間の初期距離(ゲージ長)は25.4mmに設定されている。器具の負荷測定値は、取付具及び把持部の質量を考慮してゼロにされる。
上記の項の引張試験の設定に記載されるように機器をセットアップする。ゲージ長及びクロスヘッド速度は、以下の試験及び表に従って調整される。データ取得率は少なくとも50ヘルツに設定される。
弾性率試験に関して:試料を、積層体Xの意図する引き伸ばし方向に10mm、積層体の意図する引き伸ばし方向に対して垂直な方向に25.4mmの寸法に切断する。非弾性領域又は弾性領域のいずれかから、試料を収集する。
1. 前負荷:均一な幅がゲージ長方向に対して垂直な方向に沿って位置するように、把持部に試料を置く。試料を上側把持部で固定し、試料をたるんだ状態で垂れ下がるようにし、次に下側把持部を閉じる。試料ヒステリシス試験では、波形長さは、ゲージ長全体に及ぶべきである(すなわち、上部把持部と底部把持部との間には、非弾性領域又はデッドゾーンが存在するべきではない)。5グラム重量の力でたるみ前負荷をセットする。これは、(13mm/分の一定のクロスヘッド速度で)たるみが5グラム重量の力で取り除かれた場合に、データ収集が開始されることを意味する。歪みは、調整されたゲージ長(lini)に基づいて計算されるが、調整されたゲージ長は5グラム重量の力の引張試験機の把持部の間の試料長さである。この調整されたゲージ長を最初の試料長さとするが、それは歪み0%に対応している。試験の任意の点における歪み率は、調整されたゲージ長で割って100を掛けた、調整されたゲージ長に対する長さの変化として定義される。
2. 第1周期負荷:表5に記載されているように、一定のクロスヘッド速度で100%の歪みまで試料を引っ張る。負荷を75%の歪みで記録し、100%の歪み(Fini)で記録する。0.001mm単位の、100%の歪み(lmax)での第1周期における把持部間の試料長さを記録する。
3. 第1の保持:試料を、100%の歪みで30秒間保持する。30秒の保持の終わりに、100%の歪み(Fend)で負荷を記録する。
4. 第1周期の除荷:表5に記載されているような一定のクロスヘッド速度で、クロスヘッドをその開始位置(初期の試料長さlini)に戻す。50%の歪みで除荷を報告する。
5. 第2の保持:試料を、1分間緩んだ状態で保持する。
6. 第2周期負荷:表5に記載されているように、一定のクロスヘッド速度で100%の歪みまで試料を引っ張る。0.001mm単位の、第2周期の7グラム重量の負荷力(lext)での、把持部間の試料長さを記録する。
7. 第2周期の保持及び除荷:次に、100%の歪みで試料を30秒間保持し、次に、表5に記載されているような一定のクロスヘッド速度で、クロスヘッドをその新たな開始位置(ゲージ長の調節前)に戻す。
上記の項の引張試験の設定に記載されるように機器をセットアップする。把捉力線間の初期距離(ゲージ長)は50.8mmに設定されている。器具の負荷測定値は、取付具及び把持部の質量を考慮してゼロにされる。
試料は、積層体を有する物品構成要素、物品構成要素ウェブ、又はラミネートウェブのいずれかから、積層体Xの意図する引き伸ばし方向に25.4mm、積層体の意図する引き伸ばし方向に対して垂直な方向に152.4mmの寸法に切断される。試料は、その他の方法が指定されない限り、試料の伸縮性領域から収集される。伸縮性領域の波形領域内の剥離力を測定するために、試料は波形領域から収集される。同様に、デッドゾーン試料は、伸縮性領域のデッドゾーンから収集される。試料の幅が十分でない、又は十分に長くない場合、次に、試料を切断及び試験するための本方法の終了時に、記載される手順に従う。
特定の圧力低下によって駆動される、試験試料を介した標準状態の空気の流速を測定することによって、積層体又は基材(例えば、フィルム、不織布、又は物品の構成要素)の空気透過率を決定する。本試験は、不織布、有孔積層体等などの、比較的高い空気透過性を有する材料に特に適している。以下のように変更して、ASTM D737を用いた。
Claims (15)
- 吸収性物品(100)であって、
第1の腰部領域(114)、第2の腰部領域(118)、及び前記第1の腰部領域と前記第2の腰部領域との間に配置された股部領域(116)と、
トップシート(124)、バックシート(126)、及び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(128)と、
伸縮性領域(18)を備え、前記第1の腰部領域又は前記第2の腰部領域のうちの1つに配置された耳部(130)及び/又は腰部機構(180)に配置されている、積層体(10)であって、
第1の不織布(12)、第2の不織布(16)、並びに前記伸縮性領域において前記第1の不織布と前記第2の不織布との間に挟持されたエラストマー性材料(14)と、
複数の分離結合部(30)及び少なくとも4%の結合密度を含む結合領域(40)であって、前記結合領域が、前記エラストマー性材料と少なくとも部分的に重なり合う結合領域(40)と、
本明細書のヒステリシス試験法による、50%で少なくとも0.90Nの除荷力と、を更に有する、積層体(10)と、
を備える、吸収性物品(100)。 - 前記分離結合部が格子パターン(36)で配置される、請求項1に記載の吸収性物品。
- 前記分離結合部が、互い違いのパターンで配置される、請求項1に記載の吸収性物品。
- 前記結合領域において、隣接する結合部が、3mm以下の最大横方向分離距離(DB)と、4mmより小さい、好ましくは2mm以下の最大長手方向分離距離(DA)によって分離される、請求項1~3のいずれか一項に記載の吸収性物品。
- 前記複数の分離結合部が、複数の超音波結合部(32)を備える、請求項1~4のいずれか一項に記載の吸収性物品。
- 前記分離結合部のうちの1つ以上が、0.3mm2以上の分離結合領域を備える、請求項1~5のいずれか一項に記載の吸収性物品。
- 前記積層体が、少なくとも2のヒステリシス比を有する、請求項1~6のいずれか一項に記載の吸収性物品。
- 前記結合密度が、少なくとも4.25%である、請求項1~7のいずれか一項に記載の吸収性物品。
- デッドゾーン(140)を更に備え、前記結合領域が、前記デッドゾーンと少なくとも部分的に重なり合う、請求項1~8のいずれか一項に記載の吸収性物品。
- 前記積層体が、少なくとも70gf/cmの平均剥離力を有する、請求項1~9のいずれか一項に記載の吸収性物品。
- 前記デッドゾーンが、少なくとも90gf/cmである第2の平均剥離力を含む、請求項9又は10に記載の吸収性物品。
- 前記結合密度よりも60%小さい第2の結合密度を含む第2の結合領域(42)を更に備える、請求項1~11のいずれか一項に記載の吸収性物品。
- 前記第2の結合領域が、波形領域(141)と少なくとも部分的に重なり合う、請求項12に記載の吸収性物品。
- 前記積層体が、1.5Nの負荷で20%以上、好ましくは25%以上の伸びを有する、請求項1~13のいずれか一項に記載の吸収性物品。
- 前記積層体が、少なくとも330%のピーク伸びを有する、請求項1~14のいずれか一項に記載の吸収性物品。
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US16/916,655 US11944522B2 (en) | 2019-07-01 | 2020-06-30 | Absorbent article with ear portion |
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JP2023528487A (ja) | 2020-06-09 | 2023-07-04 | ザ プロクター アンド ギャンブル カンパニー | 結合パターンを有する物品 |
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2020
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- 2020-07-01 EP EP20746527.9A patent/EP3993750A1/en active Pending
- 2020-07-01 JP JP2021576362A patent/JP2022537787A/ja active Pending
- 2020-07-01 WO PCT/US2020/070219 patent/WO2021003493A1/en unknown
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Patent Citations (2)
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JP2017064233A (ja) * | 2015-09-30 | 2017-04-06 | 大王製紙株式会社 | 幅方向に伸縮部を有する吸収性物品及びその製造方法 |
US20180271716A1 (en) * | 2017-03-27 | 2018-09-27 | The Procter & Gamble Company | Elastomeric laminate with soft noncrimped spunbond fiber webs |
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US20210000656A1 (en) | 2021-01-07 |
US20240197540A1 (en) | 2024-06-20 |
JP2024023394A (ja) | 2024-02-21 |
EP3993750A1 (en) | 2022-05-11 |
US11944522B2 (en) | 2024-04-02 |
WO2021003493A1 (en) | 2021-01-07 |
CN114072114A (zh) | 2022-02-18 |
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