JP2014506208A - 多層ポリオレフィン延伸フィルムの製造方法、およびそれにより製造された多層ポリオレフィン延伸フィルム - Google Patents
多層ポリオレフィン延伸フィルムの製造方法、およびそれにより製造された多層ポリオレフィン延伸フィルム Download PDFInfo
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Abstract
【選択図】図5
Description
1:スキン外層 2:スキン内層
3:コア層 4:機能性樹脂層
5:押出機 6:冷却ロール
7:縦方向延伸機 8:横方向延伸機
9:巻取ロール
10:スキン外層 20:スキン内層
30:コア層 40:樹脂層
100‐1:第1押出機 100‐2:第2押出機
150:樹脂供給部 200:第1冷却ロール
300:縦方向延伸機
400:第2冷却ロール
500:横方向延伸機
600:ワインダー
図5に示される装置を利用して、押出を通じてスキン外層10/コア層30/スキン内層20を形成、冷却した後、縦方向延伸比4倍に縦延伸した。そして、縦延伸後、連続押出を通じたインライン(In‐Line)工程により、前記スキン内層20上に樹脂層40としてEVA層をラミネーション、冷却した後、横方向延伸比8倍に横方向延伸して、図3に示されるところのような4層構造の延伸フィルムを製造した。このとき、スキン外層10およびコア層30はPP層により構成し、スキン内層20は、PE層により構成される(実施例1)。そして前記EVA層上に、紙を熱ラミネーションしたものを実施例2による試片とした。
現在市販されているEVA熱ラミネーション製品を購入して、本比較例1および2の試片として使用した。具体的に、押出を通じてスキン外層(PP層)/コア層(PP層)/スキン内層(PE層)を形成、冷却し、縦方向延伸比4倍、横方向延伸比8倍にして縦方向延伸と横方向延伸を連続的に遂行する。次に、Off‐Lineを通じてスキン内層(PE層)にEVA層を熱ラミネーションしたものを、比較例1による試片として使用した。そして、EVA層上に紙を熱ラミネーションしたものを、比較例2による試片として使用した。
(1)カッターバー(cutter bar)を利用して、各試片を、横(15mm)×縦(150mm)にカッティングしたサンプルを準備した。
(2)一定のサイズにカッティングされたサンプルの樹脂層(EVA層)とスキン内層(PE層)をかみそりで一定の長さのみ層間剥離した。
(3)一定の長さで層間剥離されたサンプルを標準電解液の入った容器に含浸させた後、密閉した。(電解液:1M LiPF6)
(4)サンプルが入っている電解液容器を、85℃の乾燥オーブンで、1日間保管した。
(5)1日後、サンプルを取り出して、層間接着強度(剥離強度)を引張強度器を利用して、180度の剥離角により測定した。
(6)実施例2および比較例2による試片に対しては、前記のような方法で樹脂層(EVA層)と紙との間の層間接着強度(剥離強度)を評価し、その結果を下記表1に示した。
Claims (9)
- 多層ポリオレフィンフィルムの押出成形を遂行する第1押出成形ステップ;
前記第1押出成形されたフィルムを冷却させる第1冷却ステップ;
前記第1冷却されたフィルムを縦方向に延伸する縦方向延伸ステップ;
前記縦方向延伸されたフィルム上に1層以上の樹脂層がラミネーションされるように押出成形する第2押出成形ステップ;
前記樹脂層がラミネーションされたフィルムを冷却する第2冷却ステップ;および、
前記第2冷却されたフィルムを横方向に延伸する横方向延伸ステップ
を含む、多層ポリオレフィン延伸フィルムの製造方法。 - 前記樹脂層がラミネーションされたフィルムの第2冷却ステップは、表面に凹凸構造を有する冷却ロールを利用して前記樹脂層に気流溝を形成させるように遂行する、請求項1に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 前記第1押出成形ステップは、前記フィルムが、スキン外層、コア層およびスキン内層を含むように遂行され、
前記第2押出成形ステップでは、樹脂層が前記スキン外層およびスキン内層からなる群より選択された一つ以上にラミネーションされるように遂行される、請求項1または2に記載の多層ポリオレフィン延伸フィルムの製造方法。 - 前記第2押出成形ステップは、前記樹脂層として、ポリオレフィン樹脂、シリコン樹脂、ウレタン樹脂、アクリル樹脂、ポリアミド樹脂、メタロセン樹脂、ナイロン樹脂、エチレン酢酸ビニル、エチレン酢酸メチル、エチレンメタクリル酸、エチレングリコール、エチレン酸ターポリマーおよびゴムからなる群より選択された一つ以上を含む原料を使用する、請求項1または2に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 前記第2押出成形ステップは、前記樹脂層として、第1押出成形ステップにおいて使用した原料よりも融点の低い樹脂を含む原料を使用する、請求項1または2に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 前記第2押出成形ステップは、前記樹脂層として、帯電防止剤を含む原料を使用する、請求項1または2に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 前記第2押出成形ステップは、前記樹脂層として、ナイロン樹脂を含む原料を使用する、請求項1または2に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 前記第1押出成形ステップは、スキン外層にスリップ剤およびブロッキング防止剤からなる群より選択された一つ以上が含まれるように遂行される、請求項3に記載の多層ポリオレフィン延伸フィルムの製造方法。
- 請求項1または2に記載の方法により製造された、多層ポリオレフィン延伸フィルム。
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