JP6396576B2 - 有孔ウェブの作製方法 - Google Patents
有孔ウェブの作製方法 Download PDFInfo
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- JP6396576B2 JP6396576B2 JP2017505196A JP2017505196A JP6396576B2 JP 6396576 B2 JP6396576 B2 JP 6396576B2 JP 2017505196 A JP2017505196 A JP 2017505196A JP 2017505196 A JP2017505196 A JP 2017505196A JP 6396576 B2 JP6396576 B2 JP 6396576B2
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- web
- teeth
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- forming
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- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
孔を形成する前駆体ウェブは、例えば、織布、不織布、ポリマーフィルムのような任意の好適な変形可能な材料を含むことが可能である。本発明の前駆体ウェブは、ポリマーフィルム、及び任意追加で、不織布ウェブ、織布、紙製ウェブ、ティッシュウェブ、又は編物生地を含む、複合体又は積層体であることが可能である。
本発明は、流体排水性を向上し、着用者の肌に対する柔軟性をもたらす、ミクロ織目構造と四角形の形状のマクロ開口部とを備えるウェブを作製するための方法と装置に関して説明される。
図6A及び6Bを参照すると、本発明による方法によって作製された有孔ウェブ1は、ウェブ1の第1面12から外方向に延出する複数の分離性延出要素2(図6Bには不図示)と、複数の、互いに離間した四角形の形状のマクロ開口部6とを備える。
流体排水試験
人工月経液模擬物質(「AMFS」)の準備
この試験で使用された人工月経液模擬物質(以下本明細書では「AMFS」と呼ぶ)は、ヒツジの脱線維素血液70%、及び溶解ゼラチン、アニオン性ポリアクリルアミド凝集剤、及びリン酸緩衝生理食塩水からなる溶液30%で構成される。このようなAMFSは、米国特許第7,659,372号により詳細に記載されている。
a)試験対象の吸収性物品を広げ、すべての剥離紙/フィルム/テープから取り外した。吸収性物品を平らにして、吸収性物品のバックシートの裏側に塗布した接着剤を用いて、A4の紙の上に固定する。
b)吸収性物品を、任意追加でデジタルカメラを装着した、例えばオリンパス社製SZX 12のような光学顕微鏡の下に配置する。焦点距離と光の強度を、総合倍率16倍の下で調節する。
c)人工月経液模擬物質(「AMFS」)調製法にしたがって、2mLのAMFSを用意して、ピペットを用いて約5秒間、吸収性物品の焦点に塗布する。AMFSの排水を、顕微鏡に接続されたビデオで、AMFS塗布から3分間にわたり記録する。
d)AMSFの排水にそれ以上進展が見られなくなってから3秒後の吸収性物品の写真を、記録した映像から選抜する。
本発明によるウェブフィルムの非制限的な1つの例が、ミクロ孔を有する70メッシュのポリエチレンフィルムを、図5Bに示す歯を有する図1及び図2に示す成形装置にかけて製造された。歯はジグザグパターンに配列され、かつそれぞれの長軸をMD方向に、短軸をCD方向に向けられている。フィルムは温度60〜90℃で活性化した。図6は、得られたウェブフィルムの大きく拡大した部位であり、SEM(日立(日本)社製TM3000)により得られた画像である。得られたフィルムをトップシートとして用いて、生理用パッドが用意された。
本発明によるウェブフィルムの非制限的な1つの例が、ミクロ孔を有する70メッシュのポリエチレンフィルムを、図5Bに示す歯を有する図1及び図2に示す成形装置にかけて製造された。歯はジグザグパターンに配列され、かつそれぞれの長軸をMD方向に、短軸をCD方向に向けられている。フィルムは温度60〜90℃で活性化した。ダイヤモンド形状の開口部を、1cm2あたり29個の密度で有するフィルム(「ダイヤモンド」サンプル)が調製された。ダイヤモンドサンプルの場合と同じ前駆体ウェブから同じプロセスにより、様々な開口部の幾何学的形状を有するウェブフィルムが作製された。
円2:直径2.0mmの円形の開口部で、ウェブの1cm2あたり18個の開口部
円2.5:直径2.5mmの円形の開口部で、ウェブの1cm2あたり12個の開口部
六角形:一辺が1.15mm、幅が1.50mm、及び高さが2.5mmの六角形の形状の開口部で、ウェブの1cm2あたり16個の開口部
Claims (19)
- 有孔ウェブを作製する方法であって、前記方法は、
a)第1面と、前記第1面の反対側にある第2面とを有する前駆体ウェブであって、開口近位端部と、開口又は閉口遠位端部と、側壁とを備える複数の分離性延出要素を前記第1面上に備える前駆体ウェブを提供するステップ、
b)その表面上に雄型要素を備える第1部材と、その表面上に不連続な雌型要素を備える第2部材とを備えるマクロ開口部形成装置を提供するステップ、及び
c)前記雄型要素と前記雌型要素とが係合するにつれて前記前駆体ウェブに、四角形の形状を有するマクロ開口部が形成されるように、前記第1部材及び前記第2部材を通して前記前駆体ウェブを移動するステップを含み、
前記雄型要素が、四角形の形状を有する前記マクロ開口部を前記前駆体ウェブ上に形成するための形状を有する歯を備え、ジグザグパターンに配列されており、
前記前駆体ウェブが、500μm未満の直径を有する分離性延出要素、少なくとも0.2のアスペクト比を有する分離性延出要素、1cm2あたり少なくとも95個の分離性延出要素、及びそれらを組み合わせたものから選択される前記分離性延出要素を備える、方法。 - 前記歯のそれぞれが、前記第1部材の前記表面上で前記第1部材に接合される近位部と、前記近位部に直接隣接し、前記歯のそれぞれの先端部に向かってテーパー形状になっている遠位部とを備え、前記近位部と前記遠位部とが互いに異なるテーパー度を有する、請求項1に記載の方法。
- 前記歯のそれぞれが、前記近位部とは異なるテーパー度を有する前記先端部を、前記近位部と前記遠位部との間に更に備える、請求項2に記載の方法。
- 前記歯のそれぞれが、多角形の形状を有する基部を有する、請求項1ないし3のいずれか一項に記載の方法。
- 前記歯のそれぞれが、四角形の形状、六角形の形状、八角形の形状、及びそれらを組み合わせたものからなる群から選択される形状を有する基部を有する、請求項4に記載の方法。
- 前記歯が、3.3以下の、断面長の断面幅に対する比率を有する基部を有する、請求項1ないし5のいずれか一項に記載の方法。
- 前記第1部材が、1cm2あたり5〜60個の雄型要素が存在する雄型要素密度である雄型要素を備える、請求項1ないし6のいずれか一項に記載の方法。
- 前記第1部材及び前記第2部材のうちの少なくとも1つが、概ね円筒形のロールである、請求項1ないし7のいずれか一項に記載の方法。
- 前記断面長の次元が機械方向又は機械横方向と平行になるように、前記歯が配列される、請求項6に記載の方法。
- 前記断面長の次元が機械方向又は機械横方向のいずれとも平行にならないように、前記歯が配列される、請求項6に記載の方法。
- 前記歯が、前記断面長の次元又は前記断面幅の次元のいずれにも平行ではない直線に沿って配置される2つの隣接する歯どうしの間に、1.9mm以下の歯間離間距離を有する、請求項6に記載の方法。
- 前記前駆体ウェブが、ポリマーフィルム、又はポリマーフィルム層を有する積層体である、請求項1ないし11のいずれか一項に記載の方法。
- 前記第1部材及び前記第2部材のうちの少なくとも1つが加熱される、請求項1ないし12のいずれか一項に記載の方法。
- 前記第1部材と前記第2部材とが最大係合状態になる場合に、前記第1部材及び前記第2部材が、前記第2部材の上面と前記第1部材の下面との間にクリアランスを有し、前記分離性延出要素が、前記ステップc)後に熱による損傷から実質的に無傷である、請求項13に記載の方法。
- 前記クリアランスが1.5mm以上である、請求項14に記載の方法。
- 前記分離性延出要素が真空成形プロセスにより形成される、請求項1ないし15のいずれか一項に記載の方法。
- 有孔ウェブを作製する方法であって、前記方法は、
a)第1面と、前記第1面の反対側にある第2面を有する前駆体ウェブを提供するステップ、
b)液圧成形、真空成形、機械変形、高静圧成形、及びそれらを組み合わせたものからなる群から選択される第1プロセスを提供するステップ、
c)その表面上に雄型要素を備える第1部材と、その表面上に雌型要素を備える第2部材とを備える成形装置を用いる第2プロセスを提供するステップ、
d)前記第1プロセスにより、前記前駆体ウェブの前記第1面上に複数の分離性延出要素を形成するステップ、及び
e)前記第2プロセスにより、前記前駆体ウェブ上にマクロ開口部を形成し、前記雄型要素と前記雌型要素とが係合するにつれて前記マクロ開口部が前記前駆体ウェブに形成されるように、前記第1部材及び前記第2部材を通して前記前駆体ウェブを移動するステップを含み、
前記マクロ開口部が四角形の形状を有し、かつ
前記雄型要素が、四角形の形状を有する前記マクロ開口部を前記前駆体ウェブ上に形成するための形状を有する歯を備え、ジグザグパターンに配列されており、
前記前駆体ウェブが、500μm未満の直径を有する分離性延出要素、少なくとも0.2のアスペクト比を有する分離性延出要素、1cm2あたり少なくとも95個の分離性延出要素、及びそれらを組み合わせたものから選択される前記分離性延出要素を備える、方法。 - 前記第1プロセスが真空成形プロセスである、請求項17に記載の方法。
- 前記歯のそれぞれが、前記第1部材の前記表面上で前記第1部材に接合される近位部と、前記近位部に直接隣接し、前記歯のそれぞれの先端部に向かってテーパー形状になっている遠位部とを備え、前記近位部と前記遠位部とが互いに異なるテーパー度を有する、請求項17に記載の方法。
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JP2017524475A (ja) | 2017-08-31 |
US20200061863A1 (en) | 2020-02-27 |
US20160039109A1 (en) | 2016-02-11 |
US9962850B2 (en) | 2018-05-08 |
RU2674277C2 (ru) | 2018-12-06 |
US20160038351A1 (en) | 2016-02-11 |
WO2016019521A1 (en) | 2016-02-11 |
US10442104B2 (en) | 2019-10-15 |
RU2017102999A (ru) | 2018-09-06 |
US20180222077A1 (en) | 2018-08-09 |
KR20170026575A (ko) | 2017-03-08 |
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