JP2017538461A - 液体分配用の三次元フィルムを有する吸収性物品 - Google Patents
液体分配用の三次元フィルムを有する吸収性物品 Download PDFInfo
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Abstract
【選択図】図1
Description
この出願は、2014年10月20日に出願された米国仮出願第62/066,210号の利益を主張し、この仮出願の開示内容は、参照することによりその全体が本願に組み入れられる。
前述したように、本明細書中の例は、三次元フィルム28を備える物品10などの吸収性物品を提供でき、三次元フィルム28は、不織布材料によって履歴的に与えられるユーザ快適さの間に釣り合いをもたらすことができるとともに、従来の捕捉分配層で見出される流体襲撃に対処する。三次元フィルム28は、真空成形、液圧成形、または、これらの組み合わせなどの成形プロセスによって三次元構造へと操作できる単一フィルムから構成されてもよい。図2〜図6に示されるように、三次元フィルム28は、上面40、厚さ44、下面42、幅、長さ、および/または、ロフトを含んでもよい。三次元フィルム28のロフトは開放格子構造をもたらしてもよく、開放格子構造は、複数の上側頂点と複数の下側頂点とを備える不揃いな一連の相互接続されたフィルム繊維58と、複数の不規則形状の(例えば図3〜図6に示されるような)開口部60とを備える。ロフトの高さ(z寸法)は、複数の上側頂点と複数の下側頂点との間で測定されてもよい。上側頂点は、下側頂点から形成される下側平面(例えば下面42)と平行になる傾向がある上側平面(x−y平面)(例えば、上面40)を形成する。上側平面と下側平面との間には開放格子構造が位置してもよく、この場合、格子の支柱は、不揃いな一連の相互接続されたフィルム繊維58から形成されている。これらの繊維58は、一般に結合されず、むしろ、一体形成される三次元構造をもたらすように単一フィルムの操作によって生じる。
吸収性物品で用いるトップシート26は、第1の表面34、第2の表面36、および、これらの表面間の厚さ38を備えるとともに、着用者の皮膚に適切に順応する軟らかい感じの刺激性がないものであってもよい。トップシート26は、その厚さにわたって液体が容易に浸透できるようにする液体透過性のものであってもよく、また、不織布または成形フィルムから構成されてもよい。トップシート26は、本明細書中に記載されるように三次元フィルム28と接触していてもよく(例えば、第2のトップシート表面36が三次元フィルム28の上面40と接触してもよく)、また、吸収性物品内で三次元フィルム28を越えて長さ方向および幅方向に延在してもよく、例えば、長さにおいては前縁および後縁から延在するとともに、幅においては左縁および右縁から延在してもよい。
吸収性コア30は、第1の表面46、第2の表面48、第1の表面46と第2の表面48の間の厚さ50、幅、および、長さを備えてもよい。一例において、吸収性コア30の幅および長さは、トップシートの幅および長さより小さくてもよい。また、吸収性コア30の幅および長さは、三次元フィルム28の幅および長さより大きくてもよい。吸収性コア30は、吸収性物品の長さ(例えば10)にわたって延びつつ吸収性物品の股当て領域内で配向されてもよい。吸収性コア30は、流体襲撃を吸収してもよく、また、吸収性物品の使用中に液体を保持してもよい。吸収性コア30は、1つの流体襲撃または複数の流体襲撃を適切に吸収できるとともに、吸収性物品を除去して廃棄できるまで流体襲撃を実質的に保持できる。吸収性コア30の貯留容量および吸収性コア30の全体にわたる流体襲撃の分配効率は、吸収性物品内に保持され得る液体の量を決定できる。
バックシート32は、第1の表面52、第2の表面54、および、第1の表面52と第2の表面54の間の厚さ56を備えてもよい。一例において、厚さ56は、100ミクロン未満、例えば50ミクロン未満であってもよい。バックシート32は、吸収性コア30と接触していてもよく、吸収性物品内で吸収性コア30を越えて長さ方向および幅方向に延在してもよく、例えば、長さにおいては前縁および後縁から延在するとともに、幅においては左縁および右縁から延在してもよい。トップシート26およびバックシート32は、例えば接着によって、あるいは、熱または超音波による溶着によってトップシートおよびバックシートを互いに結合できるように、前縁で、後縁で、左縁で、および、右縁で接触(例えば、互いと接触)してもよい。バックシート32は、薄い(例えば、厚さが50ミクロン未満)プラスチックフィルム、例えば、ポリエチレンフィルムまたはポリプロピレンフィルム、液体を浸透させない材料でコーティングされた不織布材料、液体を浸透させない疎水性不織布材料、または、プラスチックフィルムと不織布材料とを備える積層体であってもよい。バックシート材料は、液体がバックシート材料を通過することを依然として防止しつつ蒸気が吸収性コアから逃げることができるようにするように通気性があってもよい。
本明細書中で利用されるストライクスルーは、所定量の表面印加液体が吸収性コアの上側に配置される三次元フィルムに入る、または、「ストライクスルーする」ために必要な時間の指標である。この一連の試験において、ストライクスルーは、その最下面に多数の穴を有する1インチ直径×5/8インチ深さのキャビティから45ダイン/センチメートルの表面張力を有する5ミリリットルの疑似尿溶液を完全に排出するための秒を単位とする時間の指標である。キャビティは、液体を制御するために濾紙が下部に配置された状態で三次元フィルムの4インチ×4インチのサンプル上に置かれる4インチ×4インチのストライクスループレートに一体形成される。
リウェット試験は、4インチ×4インチのサンプル三次元フィルムを、濾紙上で上面を上に向けて、約45ダイン/センチメートルの表面張力を有する疑似尿溶液と重ね合わせた状態で、濾紙が飽和するようになるまで湿らせることを含む。流体がサンプルの全体にわたって均一に分配されるように0.5p.s.iの均一な圧力荷重が3分の期間にわたってサンプルに印加される。圧力が瞬間的に除去され、直径が約15センチメートルの予め加重された濾紙の第2のサンプルが三次元フィルムの上面を覆って挿入されるとともに、所定の圧力荷重が2分の期間にわたって再びサンプルに印加される。その後、第2の濾紙が除去されて再び加重され、第2の濾紙により吸収された流体の量がサンプルの「リウェット」と称される。結果は、第2の濾紙により吸収された流体のグラムで表わされる。このように言うまでもなく、より小さい「リウェット」数は、より乾燥した表面感触を示す。1グラム未満のリウェットグラムが目標とされる。これは、米国特許第4,601,868号に記載されるストライクスルー試験に類似し得る。
サンプルの空気透過性は、各三次元フィルムの1インチ直径サンプルを例えばメリーランド州にあるゲイサーズバーグのFrazier Precision Instrument Companyから入手できるものなどFrazier High Pressure Differential Air Permeability テスター上に配置することによって決定される。Frazier No.8 オリフィスプレートが使用された。結果は、マノメータから直接に得られ、30インチHg、70°F、65%相対湿度、試験が行われる好ましい条件で1分間毎のウェブ材料の1平方フィート当たりの空気の立方フィートを単位とする空気流量読み取り値をもたらすために標準的なチャートを用いて変換された。
見た目の軟らかさのためにトップシートが上方を向いた状態でトップシートと吸収性コアとの間に位置する一連の材料を備える吸収性物品の検討を20人の個人の解答者達に求めた。各解答者は、外観検査のみに基づき、吸収性物品の中心部の知覚される軟らかさを1〜10のスケールでランク付けすることが求められた。この場合、10が最も軟らかく、1が最も低い軟らかさである。試験は、2つの異なるトップシートを用いて繰り返された。一方のトップシートは17gsmスパンボンド不織布であり、他方のトップシートは22gsmエアースルータイプのボンド不織布である。解答者達は、吸収性物品に触れることが許されなかった。
Claims (7)
- 第1の表面、第2の表面、および、これらの表面間の厚さを有するトップシート材料と、
上面、厚さ、下面、幅、長さ、および、ロフトを有する三次元フィルムであって、前記ロフトは開放格子構造を備え、前記開放格子構造は不揃いな一連の相互接続されたフィルム繊維を備え、不揃いな一連の相互接続された前記フィルム繊維は複数の上側頂点と複数の下側頂点と不揃いな一連の相互接続された前記フィルム繊維から形成される複数の不規則形状の開口部とを備え、相互接続された前記フィルム繊維は前記フィルムの前記厚さから形成される、三次元フィルムと、
第1の表面、第2の表面、前記第1の表面と前記第2の表面の間の厚さ、幅、および、長さを備える吸収性コアと、
第1の表面、第2の表面、前記第1の表面と前記第2の表面の間の厚さを備えるバックシートと、
を備え、
前記トップシート材料の前記第2の表面と前記三次元フィルムの前記上面とが連続的な接触状態にあり、前記三次元フィルムの前記下面と前記吸収性コアの前記第1の表面とが連続的な接触状態にあり、前記吸収性コアの前記第2の表面と前記バックシートの第1の表面とが連続的な接触状態にあり、前記トップシート材料の前記第2の表面と前記バックシートの前記第1の表面とが、前記三次元フィルムの幅および長さと、前記吸収性コアの幅および長さとを包含し、
前記上面は、不揃いな一連の相互接続された前記フィルム繊維の上側頂点から形成され、前記下面は、不揃いな一連の相互接続された前記フィルム繊維の前記下側頂点から形成され、前記三次元フィルムの前記ロフトおよび不揃いな一連の相互接続された前記フィルム繊維の下側頂点は不規則形状の前記開口部を備える、
吸収性物品。 - 前記三次元フィルムの不揃いな一連の相互接続された前記フィルム繊維の前記下側頂点が不規則形状の前記開口部に対応する請求項1に記載の吸収性物品。
- 前記三次元フィルムのストライクスルー特性が1秒未満である請求項1に記載の吸収性物品。
- 前記三次元フィルムのリウェットが1グラム未満である請求項1に記載の吸収性物品。
- 前記三次元フィルムは、ポリオレフィン、好ましくはポリエチレン、ポリプロピレン、および、これらの混合物を備える請求項1に記載の吸収性物品。
- トップシートは、15〜25gsmの基準重量を有する不織布を備える請求項1に記載の吸収性物品。
- トップシートは、不織布スパンボンド、エアースルータイプのボンド不織布、および、スパンレースから選択される請求項1に記載の吸収性物品。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462066210P | 2014-10-20 | 2014-10-20 | |
| US62/066,210 | 2014-10-20 | ||
| PCT/US2015/056440 WO2016064861A1 (en) | 2014-10-20 | 2015-10-20 | Absorbent article with three-dimensional film for liquid distribution |
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| JP2017538461A true JP2017538461A (ja) | 2017-12-28 |
| JP6756707B2 JP6756707B2 (ja) | 2020-09-16 |
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| US (1) | US10195093B2 (ja) |
| EP (1) | EP3209259B1 (ja) |
| JP (1) | JP6756707B2 (ja) |
| KR (1) | KR20170071562A (ja) |
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| US10687992B2 (en) | 2015-10-20 | 2020-06-23 | Tredegar Film Products Llc | Formed film acquisition distribution layer and absorptive device therewith |
| US10258517B1 (en) | 2018-05-25 | 2019-04-16 | Tredegar Film Products Corporation | Fluid distribution material for absorbent articles |
| PL4057963T3 (pl) * | 2019-11-14 | 2025-12-15 | Fitesa Film Products Llc | Folie i laminaty do wyrobów chłonnych |
| WO2025101179A1 (en) * | 2023-11-10 | 2025-05-15 | Kimberly-Clark Worldwide, Inc. | An absorbent article with fluid control features |
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| WO2016064861A1 (en) | 2016-04-28 |
| TW201622675A (zh) | 2016-07-01 |
| BR112017008294A2 (pt) | 2017-12-19 |
| CN107072852A (zh) | 2017-08-18 |
| BR112017008294B1 (pt) | 2022-05-24 |
| US20160106602A1 (en) | 2016-04-21 |
| KR20170071562A (ko) | 2017-06-23 |
| BR112017008294B8 (pt) | 2023-02-14 |
| TWI715540B (zh) | 2021-01-11 |
| US10195093B2 (en) | 2019-02-05 |
| EP3209259A1 (en) | 2017-08-30 |
| CN107072852B (zh) | 2020-12-22 |
| JP6756707B2 (ja) | 2020-09-16 |
| EP3209259B1 (en) | 2023-03-22 |
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