JP2022527188A - 改善された性能を有する吸収性物品 - Google Patents
改善された性能を有する吸収性物品 Download PDFInfo
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- JP2022527188A JP2022527188A JP2021557921A JP2021557921A JP2022527188A JP 2022527188 A JP2022527188 A JP 2022527188A JP 2021557921 A JP2021557921 A JP 2021557921A JP 2021557921 A JP2021557921 A JP 2021557921A JP 2022527188 A JP2022527188 A JP 2022527188A
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- seconds
- absorbent article
- fluid control
- control layer
- fibers
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Abstract
Description
再び図1A及び1Bを参照すると、前述のように、本開示の使い捨て吸収性物品は、トップシート20及びバックシート50を含むことができる。それらの間には、流体管理層30及び吸収性コア40を挟み込むことができる。更なる層を、トップシート20とバックシート50との間に配置してもよい。
キャリパ
試験片のキャリパ又は厚さは、試料が載置される基準プラットフォームと、特定の時間にわたって試料上に特定の量の圧力をかける押さえとの間の距離として測定される。全ての測定は、23℃±2℃及び相対湿度50%±2%で維持された実験室で実施され、試験片は、試験前に少なくとも2時間、この環境で調整される。
キャリパ係数は、前述したように、試料の坪量10gsm当たりのキャリパである。したがって、式は、キャリパ/(坪量/10)である。
試験試料の坪量は、単一の材料層の単位面積(平方メートル単位)当たりの質量(グラム単位)であり、公定法WSP130.1に従って測定される。試験試料の塊を既知の面積に切断し、0.0001グラムの精度の分析天秤を用いて試料の質量を測定する。全ての測定は、23℃±2℃及び相対湿度50%±2%で維持された実験室で実施され、試験試料は、試験前に少なくとも2時間、この環境で調整される。
複数の繊維タイプの混合物を含む試験片の定量的化学組成をISO1833-1を用いて決定する。全ての測定は、23℃±2℃及び相対湿度50%±2%に維持された実験室内で実施する。
織物ウェブ(例えば、織布、不織布、エアレイド)は、材料の個別の繊維から構成されている。繊維を、デシテックス単位で報告された線質量密度に関して測定する。デシテックス値は、10,000メートルの繊維中に存在するその繊維の質量をグラム単位で表したものである。材料ウェブ中の繊維のデシテックス値は、多くの場合、仕様の一部として製造業者によって報告されている。繊維のデシテックス値が既知でない場合、走査電子顕微鏡法(SEM)などの好適な顕微鏡法によって繊維の断面積を測定し、FT-IR(フーリエ変換赤外線)分光法及び/又はDSC(動的走査熱量測定)などの好適な技法を用いて繊維の組成を決定した後、組成物の密度についての文献の値を用いて10,000メートルの繊維中に存在する繊維の質量をグラム単位で計算することによって計算することができる。全ての試験は、23℃±2.0℃の温度及び50%±2%の相対湿度に維持された室内で実施され、試料は、試験前に少なくとも2時間、同じ環境条件下で調整される。
dk=10000m×ak×ρk×10-6
式中、dkの単位は(計算された長さ10,000メートル当たりの)グラム数であり、akの単位はμm2であり、ρkの単位はグラム/立方センチメートル(g/cm3)である。デシテックスは、繊維タイプ(例えば、PP、PET、セルロース、PP/PET2成分)と共に0.1g単位(計算された長さ10,000メートル当たり)で報告される。
人工月経液(AMF)は、脱線維ヒツジ血液、リン酸緩衝生理食塩水、及び粘液成分の混合物から構成される。AMFは、23℃で7.15~8.65センチストークスの粘度を有するように調製される。
捕捉時間は、染み透りプレート及び電子回路インターバルタイマーを使用して、本明細書に記載の人工月経流体(AMF)が投与された吸収性物品について測定される。吸収性物品が一連の投与量のAMFを捕捉するために必要とされる時間が記録される。捕捉試験の後、再湿潤試験を実施する。全ての測定は、23℃±2℃及び相対湿度50%±2%に維持された実験室内で実施する。
この方法は、吸収性物品上で可視の流体染みのサイズを測定する方法を記載する。この手順は、本明細書に記載されるような別個の方法(例えば、繰り返し捕捉及び再湿潤法)に従って試験液を投与した直後の試験試料に対して実施される。得られた試験試料を制御された条件下で撮影する。次いで、画像分析ソフトウェアを使用して各写真画像を分析して、得られる可視染みのサイズの測定値を得る。全ての測定は、一定温度(23℃±2℃)及び相対湿度(50%±2%)で実施される。
動的機械分析器(Dynamic Mechanical Analyzer、DMA)を使用して、個々の材料又は吸収性物品の一部分から得られた試験片の圧縮抵抗及び回復特性を測定する。好適な器具は、直径40mmの圧縮プレートを備えたDMA Q800(TA Instruments(New Castle,Delaware)から入手可能)、又は同等物である。試験片は、応力の制御された変化を伴う一連の軸方向圧縮力傾斜に曝露され、結果として生じる変位の変化が測定される。全ての試験は、23℃±3℃及び50%±2%の相対湿度に制御された室内で行う。
染み透り時間は、公定法WSP70.3に従って染み透りプレート及び電子回路インターバルタイマーを使用して、既知の体積の試験液で汚された試験試料について測定する。試験液が試験試料を通過するのに必要な時間を記録する。全ての測定は、23℃±2℃及び相対湿度50%±2%で維持された実験室で実施され、試験試料は、試験前に少なくとも2時間、この環境で調整される。
湿潤CD可撓性は、コンピュータインターフェースを有する延伸引張試験機の水平方向に向けられた一定速度に対して周期的圧縮試験を使用して、本明細書に記載されるように、既知の体積の製紙工業流体(Paper Industry Fluid、PIF)を装填した吸収性物品を変形させるのに必要な力の尺度である。試験は、7サイクルの荷重印加及び荷重除去からなり、平均ヒステリシス面積(可撓性)、平均初期勾配(初期剛性)、及び最後の3サイクルにわたる力対変位曲線の平均全勾配(総剛性)を計算する。全ての試験は、23℃±3℃及び50%±2%の相対湿度に制御された部屋にて行われる。
製紙工業流体(PIF)は、広く受け入れられているヒト経血の無害な非血液系代理流体である。PIFは、塩化ナトリウム、カルボキシメチルセルロース、グリセロール、及び重炭酸ナトリウムからなる水性混合物であり、表面張力は、非イオン性界面活性剤の添加により調整される。この標準的な試験流体は、生理製品の製造業者のフランス工業グループ(Groupment Francaise de producteurs d’articles pour usage sanitaires et domestiques)の技術委員会によって開発され、1994年9月のAFNOR標準、Normilization francaise Q34-018に記載されている。適切に調製された場合、PIFは、23℃±1℃の温度で11±1センチポアズの粘度、50±2mN/mの表面張力、及び8±1のpH値を有する。
本明細書で提供されるMD曲げ長さの測定値を、Worldwide Strategic Partners(WSP)試験方法90.1を使用することによって得た。
Claims (18)
- 使い捨て吸収性物品であって、
トップシートと、
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た吸収性コアと、
前記トップシートと前記吸収性コアとの間に配置された一体化されたカード処理不織布の流体管理層と、
を備え、
前記吸収性物品が、染みサイズ試験方法に従って測定されたときに、約2400mm2未満の平均染みサイズを示す、
使い捨て吸収性物品。 - 前記吸収性物品が、繰り返し捕捉及び再湿潤法によって測定されたときに、約5秒~約13秒、より好ましくは約5秒~約12秒、又は最も好ましくは約5秒~約11秒の第1の噴出の捕捉速度を示す、請求項1に記載の使い捨て吸収性物品。
- 前記吸収性物品が、約2100mm2未満、又は最も好ましくは約1800mm2未満の平均染みサイズを示す、請求項1又は2に記載の使い捨て吸収性物品。
- 前記吸収性物品が、約9秒~約23秒、より好ましくは約9秒~約21秒、又は最も好ましくは約9秒~約18秒の第2の噴出の平均捕捉速度を示す、請求項1~3のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、約15秒~約31秒、より好ましくは約15秒~約29秒、又は最も好ましくは約15秒~約27秒の第3の噴出の平均捕捉速度を示す、請求項1~4のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、前記第1の噴出に対して約13秒未満、より好ましくは12秒未満、又は最も好ましくは11秒未満の平均捕捉速度を示す、請求項1~5のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、第2の噴出に対して約23秒未満、より好ましくは第2の噴出に対して21秒未満、又は最も好ましくは第2の噴出に対して約18秒未満の平均捕捉速度を示す、請求項1~6のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、第3の噴出に対して約31秒未満、より好ましくは第3の噴出に対して約29秒未満、又は最も好ましくは第3の噴出に対して約27秒未満の平均捕捉速度を示す、請求項1~7のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、約0.1グラム~約1.0グラム、より好ましくは約0.1グラム~約0.9グラム、又は最も好ましくは約0.1グラム~約0.8グラムの平均再湿潤値を示す、請求項1~8のいずれか一項に記載の使い捨て吸収性物品。
- 前記吸収性物品が、バンチ圧縮試験方法に従って測定されたときに、約25パーセント~約45パーセント、より好ましくは約25パーセント~約42パーセント、又は最も好ましくは約25パーセント~約40パーセントの第5のサイクルにおける圧縮パーセントの減少のエネルギーを示す、請求項1~9のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約40gsm~約75gsmの範囲、より好ましくは約50gsm~約70gsmの範囲、又は最も好ましくは約55gsm~約65gsmの範囲の坪量を有する、請求項1~10のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約10重量%~約60重量%、より好ましくは約15重量%~約50重量%、最も好ましくは約20重量%~約40重量%の吸収性繊維を含む、請求項1~11のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約1dtex~約7dtex、より好ましくは約1.4dtex~約6dtex、又は最も好ましくは約1.7dtex~約5dtexの線密度を有する吸収性繊維を含む、請求項1~12のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約15重量%~約70重量%、より好ましくは約20重量%~約60重量%、又は最も好ましくは約25重量%~約50重量%の弾性繊維を含む、請求項1~13のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約4dtex~約15dtex、より好ましくは約5dtex~約12dtex、又は最も好ましくは約6dtex~約10dtexの線密度を有する弾性繊維を含む、請求項1~14のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約25%~約70%、より好ましくは約30%~約60%、又は最も好ましくは約40%~約55%の剛化繊維を含む、請求項1~15のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、約1.0dtex~約6dtex、より好ましくは約1.5dtex~約5dtex、又は最も好ましくは約2.0dtex~約4dtexの線密度を有する剛化繊維を含む、請求項1~16のいずれか一項に記載の使い捨て吸収性物品。
- 前記流体管理層が、スパンレースされている、請求項1~17のいずれか一項に記載の使い捨て吸収性物品。
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