JP6553588B2 - 高分子多層フィルム及びその製造方法 - Google Patents
高分子多層フィルム及びその製造方法 Download PDFInfo
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- JP6553588B2 JP6553588B2 JP2016500592A JP2016500592A JP6553588B2 JP 6553588 B2 JP6553588 B2 JP 6553588B2 JP 2016500592 A JP2016500592 A JP 2016500592A JP 2016500592 A JP2016500592 A JP 2016500592A JP 6553588 B2 JP6553588 B2 JP 6553588B2
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Description
本出願は、参照することによりその開示内容が全体として本明細書に組み込まれる、2013年3月12日に出願された米国特許仮出願第61/777526号の利益を主張するものである。
少なくとも2つの(いくつかの実施形態では、少なくとも3つ、4つ、5つ又はそれ以上の)分離可能な高分子層をニップに押し出して高分子多層フィルムを供給する工程であって、該ニップが、高分子多層フィルムの第1の主要表面を貫通するくぼみを付与する構造化表面を有する第1のロールを備える工程と、
くぼみを有する第1の主要表面を冷却ロールに通すと同時に、高分子多層フィルムの、概して対向する第2の主要表面に熱源を適用し、熱源からの熱を加えた結果、開口部が形成され、概して対向する第1及び第2の主要表面、第1及び第2の主要表面間に延在する開口部の列、並びに互いに分離可能な第1及び第2の隣接層を有する高分子多層フィルムを提供する工程であって、各開口部が、第1及び第2の主要表面からの開口部を貫通する一連の面積を最小面積から最大面積を範囲として有し、最小面積が主要表面のうちの少なくとも片側にはない、高分子多層フィルムを提供する工程とを含む。任意選択により、この方法は、開口部を有する高分子多層フィルムのうちの少なくとも第1及び第2の層を分離することを更に含む。
1.概して対向する第1及び第2の主要表面と、互いに分離可能な隣接した第1及び第2の層と、第1及び第2の層内に延在するくぼみの配列とを有する高分子多層フィルム。
少なくとも2つの分離可能な高分子層をニップに押し出して高分子多層フィルムを供給する工程であって、該ニップが、高分子多層フィルムの第1の主要表面を貫通するくぼみを付与する構造化表面を有する第1のロールを備える工程と、
くぼみを有する第1の主要表面を冷却ロールに通すと同時に、高分子多層フィルムの、概して対向する第2の主要表面に熱源を適用し、熱源からの熱を加えた結果、開口部が形成され、実施形態5〜10のいずれかに記載の高分子多層フィルムを供給する工程とを含む、方法。
以下の手順を使用して有孔高分子多層フィルムを調製した。層A、B及びCからなる三層高分子フィルムを、3つの押出機から幅25cmの3層を供給するマルチマニホールドダイ(Cloeren Inc.(Orange TX)製の商標名「CLOEREN」として入手)を使用して調製した。層A及びBは、同じ重合体から構成され(本明細書において以後、層「AB」と呼ぶ)、その結果、後続する押出法で層Cと合わせた1つの単層として本質的に作用した。押出法は、ツーリングロール(432)及び平滑鋼製バックアップロール(438)からなるニップ中に垂直下向きに実行した。押出法は、図4に概略的に示すように、層ABがツーリングロール(432)に接し、層Cがバックアップロール(438)に接するように、設定した。層Aの重合体は、6.35cmの単軸スクリュー押出機によって供給した。層Bの重合体は、6.35cmの単軸スクリュー押出機によって供給した。層Cの重合体は、3.2cmの単軸スクリュー押出機によって供給した。三つの押出機の加熱帯温度を、以下の表1に示す。
冷却ロール(434)は、エッチング又は食刻パターンのない滑らかな表面のロールであった。
バーナー(439)は、その開示内容が参照により組み込まれる米国特許第7,635,264号(Strobelら)に記載の抗ハウリング設計の30.5センチメートル(12インチ)の六口バーナーであり、Flynn Burner社(New Rochelle,NY)から入手した。
巻き戻し張力:178ニュートンの総張力
巻き取り張力:178ニュートンの総張力
バーナー(439)BTU:5118 BTU/cm/時間(1500W/cm/時間)
1%余剰酸素
バーナー(439)とフィルム表面間のギャップ12mm
ライン速度:30m/min.
冷却ロールの冷水設定点:15.5℃
以下の表3に示す温度設定点を用いて、実施例1と同様に、高分子多層フィルムを押し出した。
[項目1]
概して対向する第1及び第2の主要表面と、互いに分離可能な隣接した第1及び第2の層と、前記第1及び第2の層内に延在するくぼみの配列と、を有する高分子多層フィルム。
[項目2]
前記第1の層が、ポリカーボネート、ポリアミド6、ポリアミド66、ポリエチレンテレフタレート、ポリエチレンナフタレート、セルロースアセトブチレート、ポリメチルメタクリレート、アクリロニトリルブタジエンスチレン、又はポリブチレンテレフタレートのうちの少なくとも1つを含み、前記第2の層がポリオレフィンを含む、項目1に記載の高分子多層フィルム。
[項目3]
前記第1の層がポリエチレンを含み、前記第2の層がポリプロピレンを含む、項目1に記載の高分子多層フィルム。
[項目4]
少なくとも第1及び第2の分離可能な高分子層をニップに押し出して高分子多層フィルムを供給する工程を含み、前記ニップが、高分子多層フィルムのうちの少なくとも第1及び第2の層内に延在するくぼみを付与する構造化表面を有する第1のロールを備える、前記項目のいずれか一項に記載の物品を製造する方法。
[項目5]
概して対向する第1及び第2の主要表面と、第1及び第2の主要表面の間に延在する開口部の配列と、互いに分離可能な少なくとも第1及び第2の隣接層とを有する高分子多層フィルムであって、各開口部が、第1及び第2の主要表面からの開口部を貫通する一連の面積を最小面積から最大面積を範囲として有し、最小面積が主要表面のうちの少なくとも片側にはない、高分子多層フィルム。
[項目6]
前記第1の層が、ポリカーボネート、ポリアミド6、ポリアミド66、ポリエチレンテレフタレート、ポリエチレンナフタレート、セルロースアセトブチレート、ポリメチルメタクリレート、アクリロニトリルブタジエンスチレン、又はポリブチレンテレフタレートのうちの少なくとも1つを含み、前記第2の層がポリオレフィンを含む、項目5に記載の高分子多層フィルム。
[項目7]
125マイクロメートル超の厚さを有する、項目5又は6のいずれかに記載の高分子多層フィルム。
[項目8]
1cm 2 当たり少なくとも30個の開口部を有する、項目5〜7のいずれか一項に記載の高分子多層フィルム。
[項目9]
開口部が、100マイクロメートル以下の最大寸法を有する、項目5〜8のいずれか一項に記載の高分子多層フィルム。
[項目10]
流動抵抗試験によって測定した場合、250レイリー〜2150レイリーの範囲の流動抵抗を有する、項目5〜9のいずれか一項に記載の高分子多層フィルム。
[項目11]
高分子多層フィルムの製造方法であって、前記方法が、
少なくとも2つの分離可能な高分子層をニップに押し出して高分子多層フィルムを供給する工程であって、前記ニップが、前記高分子多層フィルムの第1の主要表面を貫通するくぼみを付与する構造化表面を有する第1のロールを備える、工程と、
前記くぼみを有する前記第1の主要表面を冷却ロールに通すと同時に、前記高分子多層フィルムの、概して対向する第2の主要表面に熱源を適用する工程であって、前記熱源からの熱を加えた結果、開口部が形成され、項目5〜10のいずれか一項に記載の高分子多層フィルムを供給する、工程と、を含む、方法。
[項目12]
開口部を有する前記高分子多層フィルムのうちの少なくとも前記第1及び第2の層を分離する工程を更に含む、項目11に記載の方法。
Claims (1)
- 概して両面にある第1及び第2の主要表面と、前記第1及び第2の主要表面の間に延在する開口部の配列と、互いに分離可能な少なくとも第1及び第2の隣接層とを有する高分子多層フィルムであって、前記開口部の各々が、前記第1及び第2の主要表面からの前記開口部を貫通する一連の面積を最小面積から最大面積を範囲として有し、前記最小面積が前記主要表面のうちの少なくとも片側にはなく、かつ前記フィルムがくぼみの配列を有しない、高分子多層フィルムの製造方法であって、前記方法が、
少なくとも2つの分離可能な高分子層をニップに押し出して高分子多層フィルムを供給する工程であって、前記ニップが、前記高分子多層フィルムの第1の主要表面を貫通するくぼみを付与する構造化表面を有する第1のロールを備える、工程と、
前記くぼみを有する前記第1の主要表面を冷却ロールに通すと同時に、前記高分子多層フィルムの、概して反対側の第2の主要表面に熱源を適用する工程であって、前記熱源からの熱を加えた結果、開口部が形成され、前記高分子多層フィルムを供給する、工程と、を含む、方法。
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