JP2022527500A - 改善された快適性を有する吸収性物品 - Google Patents
改善された快適性を有する吸収性物品 Download PDFInfo
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- JP2022527500A JP2022527500A JP2021557958A JP2021557958A JP2022527500A JP 2022527500 A JP2022527500 A JP 2022527500A JP 2021557958 A JP2021557958 A JP 2021557958A JP 2021557958 A JP2021557958 A JP 2021557958A JP 2022527500 A JP2022527500 A JP 2022527500A
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- fibers
- absorbent
- fluid control
- absorbent article
- control layer
- Prior art date
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530437—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a part with elevated absorption means
- A61F2013/530452—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a part with elevated absorption means having chemically-stiffened fibres
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F2013/53062—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the form in fibres being made into a paper or non-woven
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
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- A61F2013/53791—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer being resilient or elastic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
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Abstract
Description
本明細書で使用する場合、以下の用語は下記に指定される意味を有するものとする。
「吸収性物品」とは、液体物を吸収し、かつ/又は閉じ込める着用可能な装置を指し、より詳細には、着用者の身体と接して、又は近接して配置されて、身体から排出される様々な排出物を吸収して閉じ込める装置を指す。吸収性物品としては、おむつ、トレーニングパンツ、成人用失禁用下着(例えば、ライナー、パッド、及びブリーフ)、及び/又は婦人衛生物品を挙げることができる。
図1は、典型的なパンティライナー(「ライナー」)構成における吸収性物品10の着用者対向表面8を示す。本発明の物品は、通常、概ね平坦な着用者対向表面を有するが、ユーザーの身体に適合するように湾曲してもよく、一般に、ユーザーの解剖学的構造に適応するように可撓性である。物品は、長手方向側部101、102及び横方向端部103、104を含み、これらはいずれも直線状であっても、あるいは湾曲していてもよい。
物品は、液体透過性であり得るトップシート12を備える。トップシートは、不織布を備え得る。不織布は、1つの繊維層で構成されてもよく、あるいは、同じ組成又は異なる組成を有し得る複数の不織布層の積層体(例えば、スパンボンド-メルトブローン積層体)であってもよい。様々な実施形態では、トップシートは、カード処理されたエアスルー結合不織布である。不織布は、疎水性繊維と親水性繊維との混合物を含み得る。いくつかの非限定的な例では、不織布は、繊維の重量の少なくとも約50%、又は少なくとも約60%の親水性繊維を含む。加えて、又は代替的に、不織布は、繊維の重量の少なくとも約30%、又は少なくとも約40%、又は少なくとも約50%の疎水性繊維を含み得る。不織布は、大部分の親水性繊維と、わずかな部分の疎水性繊維とを含み得る。例えば、不織布は、約60%の親水性繊維と、約40%の疎水性繊維とを含み得る。繊維は、約1.2~約3.5デニール、又は約1.3~約3デニール、又は約2デニールの径を有してもよく、当該範囲についてこの範囲内の0.1刻みに列挙する。繊維は、ポリエチレン(PE)及び/又はポリエチレンテレフタレート(PET)などのポリマー材料から形成されてもよい。繊維は、2成分繊維の形態であってもよい。非限定的な例では、2成分繊維は、コアとしてのPETをシースとしての別のポリマーと組み合わせて含み得る。更なる非限定的な例では、PEを、PETコアと組み合わせてシースとして使用してもよい。好適な繊維は、少なくとも約30mm、又は少なくとも約40mm、又は少なくとも約50mm、又は最大約55mm、又は約30~約55mm、又は約35~約52mmの長さを有するステープル繊維であってもよく、当該範囲についてこの範囲内の1mm刻みに列挙する。非限定的な例では、ステープル繊維は、約38mmの長さを有してもよい。
流体管理層は、吸収性コアとトップシートとの間に配置される。図2に戻ると、流体管理層20は、対向する端縁部22A及び22Bを備え、これらは、横軸Tと概ね平行に延びてもよく、真っ直ぐであっても、あるいは湾曲していてもよい。また、流体管理層20は、側縁部21A及び21Bを備え、これらは、長手方向軸Lと概ね平行に延びてもよく、真っ直ぐであっても、あるいは湾曲していてもよい。本開示の流体管理層は、複数のカード処理された一体型繊維を含む。流体管理層は、より柔らかい感触の物品へと変換することができる高いキャリパを吸収性物品に提供する。加えて、本開示の流体管理層は、現在入手可能な吸収性物品の弾力性よりも高い弾力性を吸収性物品に提供することができる。典型的には、弾力性と柔らかさとのトレードオフが存在する。より柔らかい材料は、1つ以上の方向における力の作用からその形状を回復させることが困難であり得る。また、弾性材料に関して、その逆が当てはまり得る。吸収性物品の文脈において、弾性材料は、典型的には、力の作用からの良好な回復を呈するが、典型的には、弾性材料は非常に柔らかいものとしては知覚されない。また、多くの吸収性物品が、乾燥時に良好な弾性特性を呈することができる点も特記に値するが、液体汚物を吸収すると、その弾力性は大幅に低下する。本開示の吸収性物品は、乾燥状態と湿潤状態の両方において良好な弾力特性を呈する。
物品は、排出物の貯蔵層として機能する吸収性コア15を更に備える。吸収性コア15の構成及び構造は異なり得る(例えば、吸収性コア15は、異なるキャリパ領域、親水性勾配、超吸収性勾配又はより低い平均密度及びより低い平均坪量の捕捉ゾーンを有してもよい)。吸収性コア15は、対向する端縁部17A及び17Bを備え、これらは、横軸Tと概ね平行に延びてもよく、真っ直ぐであっても、あるいは湾曲していてもよい。また、吸収性コア15は、側縁部16A及び16Bを備え、これらは、長手方向軸Lと概ね平行に延びてもよく、真っ直ぐであっても、あるいは湾曲していてもよい。吸収性コア15の寸法及び吸収能力も、様々な着用者に適応するように異なり得る。しかしながら、吸収性コア15の全吸収容量は、使い捨て吸収性物品の設計負荷及び意図される用途に適合したものでなければならない。
バックシート14は、吸収性コア15の衣類対向表面に直接隣接して配置してもよい。バックシート14は、トップシート及び/又はコアに少なくとも外周で接合されてもよく、当該技術分野で周知のものなどの取り付け方法によってそれらに接合されてもよい。例えば、バックシート14は、均一な連続層の接着剤、パターン層の接着剤、又は独立した線、螺旋若しくは点の配列の接着剤によって吸収性コア15に固定することができる。あるいは、取り付け方法は、熱接着、圧力接着、超音波接着、動的機械的接着、若しくは当該技術分野で既知の他の任意の好適な取り付け方法又はこれら取り付け方法の組み合わせの使用を含んでもよい。
トップシートとバックシートとを一緒に接合して、使い捨て吸収性物品の外周部を形成することができる。吸収性コア及び/又は流体管理層の周辺部は、外周部の内部に配置され得る。例えば、吸収性コアは、横軸と概ね平行に延びる端縁部と、長手方向軸と概ね平行に延びる側縁部とを有してもよい。端縁部及び側縁部のそれぞれは、外周部の内部に配置され得る。同様に、流体管理層は、横軸と概ね平行に延びる端縁部と、長手方向軸と概ね平行に延びる側縁部とを有してもよい。端縁部及び側縁部は、外周部の内部に配置され得る。あるいは、端縁部は、端縁部が外周部と交差する限り、外周部と隣接することができる。流体管理層の端縁部に加えて、又はそれとは関係なく、流体管理層の側縁部は、吸収性物品の外周部とともに終端してよい。
バックシート表面上にコーティングされた接着剤は、典型的には、保護カバーを備えており、保護カバーは、使用前に除去される。保護カバーは、シリコーンコーティングされた剥離紙、プラスチックフィルム、又は任意の他の容易に除去可能なカバーであってもよい。保護カバーは、単一片又は例えば、個々の接着剤領域を覆うための複数片であってもよい。また、保護カバーは、物品を個別にパッケージすること、又は使い捨ての機能を提供することなど、他の機能を行うこともできる。任意の市販の剥離紙又はフィルムが使用されてもよい。好適な例としては、Akrosil Corporationから入手可能なBL 30 MG-A SILOX EI/O、BL 30 MG-A SILOX 4 P/O、及びドイツのGronauからcode X-5432で入手可能なM&Wフィルムが挙げられる。
バンチ圧縮試験
試料のバンチ圧縮を、測定される力がセルの限界の1%~99%以内となるロードセルを使用した定速の伸長引張試験機(好適な計器は、MTS Systems Corp.(Eden Prairie,MN)から入手可能な、Testworks 4.0 software又はTestSuite softwareを使用したMTS Alliance、又は等価物である)で測定する。すべての試験は、23℃±3℃かつ相対湿度50%±2%に制御された室内で行われる。試験は湿潤状態又は乾燥状態で実施することができる。
試料の曲げ特性を、測定される力がセルの限界の1%~99%以内となるロードセルを使用した定速の伸長引張試験機(好適な計器は、MTS Systems Corp.(Eden Prairie,MN)から入手可能なTestworks 4.0 Software又はTestSuite Softwareを使用したMTS Alliance)で測定する。すべての試験は、23℃±3℃かつ相対湿度50%±2%に制御された室内で行われる。
公定法WSP70.3に記載される裏抜けプレート及び電子回路間隔タイマーを使用して、既知の体積の試験液体で汚された試験試料について液体捕捉時間を測定する。試験液体が試験試料内へと通過するのに要する時間を記録する。液体捕捉試験に続いて、試験試料に対して再湿潤試験(本明細書では別個に記載する)を実施する。すべての測定は、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。
液体捕捉試験(本明細書で別個に記載する)の20分後に、試験試料で標準再湿潤量を測定する。再湿潤量は、重量が印加されたときに、予め湿潤させておいた試験試料から出てくる液体の量である。すべての測定は、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。
液体捕捉試験(本明細書で別個に記載する)の1分後に、試験試料で瞬間再湿潤量を測定する。再湿潤量は、重量が印加されたときに、予め湿潤させておいた試験試料から出てくる液体の量である。すべての測定は、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。
空気透過率は、特定の試験面積及び圧力低下の条件下で試験片を垂直に通過する空気流の速度である。公定法WSP70.1に従って、本方法に記載される試験装置を使用して、20cm2の試験面積及び125Paの圧力低下について空気透過率を測定する。好適な計器は、Textest AG(Schwerzenbach,Switzerland)から入手可能なFX3300 Air Permeability Testerである。すべての測定は、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。
試験片のキャリパ又は厚さは、試験片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。すべての測定は、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。すべての測定は、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。すべての測定は、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を単位として測定する。デシテックス値は、10000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)などの好適な方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10000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。すべての試験は、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10000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10000メートル当たり)で報告する。
Claims (15)
- 吸収性物品であって、
液体透過性のトップシートと、
前記トップシートに少なくとも外周で接合されたバックシートと、
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、
40gsm~65gsmの坪量を有する一体型不織布の流体管理層と、
10mg以下の尿の標準再湿潤値と、
を有する、吸収性物品。 - 前記吸収性物品がライナーである、請求項1に記載の吸収性物品。
- 尿の瞬間再湿潤値が4mg以下であり、前記吸収性コアが、少なくとも150gsmの坪量を有する、請求項1又は2に記載の吸収性物品。
- 前記トップシートにはフィルムがない、請求項1~3のいずれか一項に記載の吸収性物品。
- 前記トップシートが不織布を含む、請求項1~4のいずれか一項に記載の吸収性物品。
- 前記トップシートが、複数の開口部及び複数の凹部を有するエアスルー結合不織布を含む、請求項5に記載の吸収性物品。
- 前記流体管理層が、複数の吸収性繊維、複数の弾性繊維、及び複数の剛化繊維を含む、請求項1~6のいずれか一項に記載の吸収性物品。
- 前記流体管理層が、10重量%~60%重量の吸収性繊維を含む、請求項7に記載の吸収性物品。
- 前記流体管理層が、15重量%~70重量%の弾性繊維を含む、請求項7又は8に記載の吸収性物品。
- 325gF以上の湿潤CDバンチ圧縮を更に有する、請求項1~9のいずれか一項に記載の吸収性物品。
- 50%以上、又はより好ましくは52%以上のCDバンチ圧縮回復率を更に有する、請求項1~10のいずれか一項に記載の吸収性物品。
- 第1のz方向に増加する多孔度勾配を更に有し、前記第1のz方向は、前記バックシートから前記トップシートに向かって延びる、請求項1~11のいずれか一項に記載の吸収性物品。
- 前記トップシートの多孔度が、前記流体管理層よりも5%~20%大きい、請求項1~12のいずれか一項に記載の吸収性物品。
- 前記流体管理層が、水流交絡又はニードルパンチによって一体化されている、請求項1~13のいずれか一項に記載の吸収性物品。
- 少なくとも74%のZ圧縮回復率を有する、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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US62/946,725 | 2019-12-11 | ||
US16/832,270 US20200315859A1 (en) | 2019-04-04 | 2020-03-27 | Absorbent article having improved comfort |
US16/832,270 | 2020-03-27 | ||
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JP2021558627A Active JP7320615B2 (ja) | 2019-04-04 | 2020-03-27 | 吸収性物品の流体管理層 |
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EP (9) | EP4306093A3 (ja) |
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US20230135421A1 (en) | 2021-10-20 | 2023-05-04 | The Procter & Gamble Company | Adhesive for an absorbent article |
US20230277392A1 (en) * | 2022-03-03 | 2023-09-07 | The Procter & Gamble Company | Upper layer system for absorbent article |
WO2023206125A1 (en) | 2022-04-27 | 2023-11-02 | The Procter & Gamble Company | Fluid management layer for an absorbent article, and an absorbent article containing the same |
WO2023229888A1 (en) | 2022-05-25 | 2023-11-30 | The Procter & Gamble Company | Method for wrapping an absorbent article |
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WO2023229885A1 (en) | 2022-05-25 | 2023-11-30 | The Procter & Gamble Company | Absorbent article with conforming features |
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