JP2022501210A - 包装用超疎水性熱可塑性フィルム及びそれから製造されるパッケージ - Google Patents
包装用超疎水性熱可塑性フィルム及びそれから製造されるパッケージ Download PDFInfo
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Abstract
Description
−外側熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している内側熱可塑性単層又は多層基材層(B)と、
−層(B)に直接接着している外側超疎水性コーティング(C)と
を含み、
コーティング(C)に直接接着している基材層(B)の表面は、粗面であり、層(B)に直接接着していないコーティング(C)の外側表面は、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する
超疎水性熱可塑性の熱収縮可能フィルムである。
i)熱可塑性のコーティングされていない任意に熱収縮可能なフィルム(A)/(B)を提供することと、このフィルム(A)/(B)が、
−熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している熱可塑性単層又は多層基材層(B)と
を含み、
層(A)に直接接着していない基材層(B)の表面が粗面である、
ii)この基材層(B)の粗面に疎水性コーティング組成物を塗布することと、
iii)塗布した疎水性コーティング組成物を硬化及び/又は乾燥させて、超疎水性コーティング(C)を形成することと、
を含み、
層(B)に直接接着していないコーティング(C)の外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する、
製造方法である。
−少なくとも1つの開口部を有する、第3の目的による任意に収縮可能な包装用物品を提供することと、
−開口部から物品内に製品を挿入することと、
−任意に真空化した後、物品を封止して、任意に真空である密封パッケージを形成することと、
−パッケージを熱水に接触させることにより収縮させること及び/又は
−熱水又は蒸気によりパッケージを低温殺菌又は滅菌することと
を含み、
乾燥ステップなしで乾燥したパッケージを提供することを特徴とする
包装方法である。
本明細書で使用する場合、「フィルム」という用語は、それがフィルムであるか、シートであるか、又はチューブであるかに関係なく、プラスチックウェブを含む。
本明細書で使用する場合、「アクリレート又はアクリレート系樹脂」という語句は、ホモポリマー、コポリマーを指し、例えば、ポリマーの主鎖を形成する繰り返し単位の少なくとも1つにアクリレート部分を有するバイポリマー、ターポリマーなどを含む。一般に、アクリレート系樹脂は、ポリアルキルアクリレートとしても知られている。アクリレート樹脂又はポリアルキルアクリレートは、当業者に公知の任意の方法によって調製することができる。本発明で使用するためのこれらの樹脂の好適例には、エチレン/メタクリレートコポリマー(EMA)、エチレン/ブチルアクリレートコポリマー(EBA)、エチレン/メタクリル酸(EMAA)、エチレン/メチルメタクリレート(EMMA)が含まれ、任意選択的にカルボキシル官能基又は好ましくは無水物官能基、イオノマーなどで改質されている。例えば、Arkema社によるLOTRYL 18 MA 002(EMA)、Du Pont社によるElvaloy AC 3117(EBA)、Du Pont社によるNucrel 1202HC(EMAA)、Du Pont社によるSurlyn 1061(イオノマー)などである。
−外側熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している内側熱可塑性単層又は多層基材層(B)と、
−層(B)に直接接着している外側超疎水性コーティング(C)と
を含み、
コーティング(C)に直接接着している基材層(B)の表面は、粗面であり、層(B)に直接接着していないコーティング(C)の外側表面は、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する
超疎水性熱可塑性の多層包装フィルムである。
(A)/(H)/(D)/(F)/(D)/(H)/(E)/(C)、(A)/(D)/(H)/(D)/(F)/(D)/(H)/(D)/(E)/(C)、
(A)/(H)/(D)/(F)/(D)/(H)/(E)/(C)、(A)/(H)/(D)/(F)/(D)/(G)/(C)、
(A)/(H)/(D)/(F)/(D)/(H)/(G)/(C)、(A)/(H)/(D)/(F)/(D)/(H)/(D)/(G)/(C)。
i)熱可塑性のコーティングされていない任意に熱収縮可能なフィルム(A)/(B)を提供することと、このフィルム(A)/(B)が、
−熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している熱可塑性単層又は多層基材層(B)と
を含み、
層(A)に直接接着していない基材層(B)の表面が粗面である、
ii)この基材層(B)の粗面に疎水性コーティング組成物を塗布することと、
iii)塗布した疎水性コーティング組成物を硬化及び/又は乾燥させて、超疎水性コーティング(C)を形成することと、
を含み、
層(B)に直接接着していないコーティング(C)の外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する、
製造方法である。
−熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している熱可塑性単層又は多層基材層(B)と
を含む、熱可塑性のコーティングされていない任意に熱収縮可能なフィルム(A)/(B)を提供することを含み、
層(A)に直接接着していない基材層(B)の表面は粗面である(ステップi)。
a)アクリレートモノマー又はオリゴマーを含む放射線硬化性層を層(A)に直接接着していない基材層(B)の表面に塗布するステップと、
b)好ましくはUV、電子ビーム又は赤外線によって、塗布された層のアクリレートモノマー又はオリゴマーを硬化させるステップと
を含む。
LLDPE1:密度0.9180g/cc、メルトフローレート(190℃/2.16kg)4.50g/10分、融点114.0℃
LLDPE2:密度0.917g/cc、メルトフローレート(190℃/2.16kg)4.50g/10分
LLDPE3:密度0.912g/cc、メルトフローレート(190℃/2.16kg)1.00g/10分
LDPE1:粘着防止樹脂、灰分9.2%、密度0.97g/cc、メルトフローレート(190℃/2.16kg)3.00g/10分、含水率最大0.20%
LDPE2:粘着防止樹脂、灰分2.40%、密度0.92g/cc、メルトフローレート(190℃/2.16kg)6.5g/10分、融点110℃
EVA1:コモノマー含有量(酢酸ビニル)18%、密度0.940g/cc、メルトフローレート(190℃/2.16kg).0.70g/10分、融点87.0℃、含水率最大0.3%、ビカー軟化点69.0℃
LLDPE−md1:コモノマー含有量(無水マレイン酸)最小0.09最大0.15%、密度0.930g/cc、メルトフローレート(190℃/02.16kg).2.50g/10分、融点126.0℃、ビカー軟化点109℃
LLDPE−md2:密度0.919g/cc、メルトフローレート(190℃/02.16kg).2.3g/10分、融点122.0℃
PA−6:密度1.130g/cc、融点220℃、相対粘度155
EVOH/EVAL1:コモノマー含有量44%、結晶点144℃、密度1.14g/cc、ガラス転移54℃、メルトフローレート(190℃/02.16kg)1.7g/10分、融点165℃、ビカー軟化点152℃
EVOH/EVAL2:コモノマー含有量38%、結晶点148℃、密度1.17g/cc、ガラス転移53℃、メルトフローレート(190℃/02.16kg)1.7g/10分、融点172℃
HDPE:密度0.961g/cc、メルトフローレート(190℃/02.16kg).6.20g/10分、融点135.0℃
ガラス微粒子:固体ガラス微小球、平均粒径:30〜50μm。タップかさ密度:1.59g/cc。
以下のフィルムを製造した。
比較フィルム及び本発明のフィルムを以下の試験に従って特性評価した。
フィルムの自由収縮%をASTM D2732に従って85℃で測定した。
フィルムサンプルの粗面の形態を調査するために、環境制御走査型電子顕微鏡(ESEM)分析をQuanta 200(FEI社製(米国))を用いて行った。
実施例3及び実施例4のコーティングフィルムの粗さを測定した。実施例3のコーティングフィルムの粗面化された表面は、ISO4287に従って測定した約0.35μmの平均粗さ(粗さ平均Ra)、約0.42μmの二乗平均平方根(RMS)粗さ(Rq)及び約2.96μmの平均粗さ深さ(Rz)を特徴とする。
上記のフィルムの静的水接触角θをASTM D7490−13に従って測定した。
これは、フィルムの予備審査に有用な非常に迅速な定性試験である。
比較フィルムC1及び実施例1の本発明によるフィルムを使用して、ゴム製の丸型ダミーを真空収縮バッグに包装した。最終パッケージでは、超疎水性表面(C)はバッグの外部表面であり、ヒートシール性表面(A)は製品と直接接触するバッグの内部表面であった。
本発明による実施例3及び実施例4のコーティングフィルムのミルログ(Mill log)を、Dusenberyのスリッターで510mm幅のロールにスリットした。スリットロールを目視検査し、それらの品質は平面性及び端部断面の点で良好であった。次に、スリットロールをOnpack 2070装置で試験して、それらの機械加工性を検査した。両方のコーティングフィルムは良好に機能した。
Claims (22)
- 超疎水性熱可塑性多層包装フィルムであって、
−外側熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している内側熱可塑性単層又は多層基材層(B)と、
−層(B)に直接接着している外側超疎水性コーティング(C)と
を含み、
前記コーティング(C)に直接接着している前記基材層(B)の表面が、粗面であり、層(B)に直接接着していない前記コーティング(C)の外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する、
超疎水性熱可塑性多層包装フィルム。 - 前記外側熱可塑性ヒートシール性層(A)が、エチレン−酢酸ビニルコポリマー(EVA)、ポリエチレン、均質又は不均質の線状エチレン−アルファ−オレフィンコポリマー、ポリプロピレンコポリマー(PP)、エチレン−プロピレンコポリマー(EPC)、アクリレート及びメタクリレート、イオノマー、ポリエステル並びにそれらのブレンドから選択される主要量のポリマーを含む、請求項1に記載のフィルム。
- 前記内側熱可塑性基材層(B)が、内側ガスバリア層(F)と、任意選択的に1つ以上の追加層とを含む、請求項1又は2に記載のフィルム。
- 前記内側熱可塑性単層又は多層基材層(B)が、微粒子を含む、請求項1〜3のいずれか一項に記載のフィルム。
- 前記微粒子が、0.5〜100ミクロン、好ましくは5〜80ミクロン、より好ましくは10〜60ミクロンの平均粒径を有する、請求項4に記載のフィルム。
- 前記微粒子が、アクリル微粒子及びガラス微粒子から選択される、請求項4又は5に記載のフィルム。
- 前記外側超疎水性コーティング(C)が、フルオロポリマー、ポリシロキサン、疎水性ナノ粒子、ワックス、好ましくは疎水性酸化物ナノ粒子、より好ましくはシリカ、アルミナ、酸化マグネシウム、チタニア微粒子及びそれらの混合物から選択される1つ以上の有機又は無機疎水性成分を含む、請求項1〜6のいずれか一項に記載のフィルム。
- 前記無機コーティング(C)の疎水性酸化物ナノ粒子が、3〜100nm、好ましくは5〜50nmの平均粒径を有する、請求項7に記載のフィルム。
- 前記基材層(B)の外側表面に堆積された前記コーティング(C)中の疎水性酸化物ナノ粒子の量が、0.01〜10g/m2、好ましくは0.1〜2.0g/m2、より好ましくは、0.2〜1.5g/m2(乾燥後のグラム数)である、請求項7又は8に記載のフィルム。
- 前記コーティング(C)の外側表面が、ISO4287に従って測定した0.32μmより大きい平均粗さ(粗さ平均)Ra、0.39μmより大きい二乗平均平方根(RMS)粗さRq及び/又は2.42μmより大きい平均粗さ深さRzを特徴とする、請求項1〜9のいずれか一項に記載のフィルム。
- 層(B)に直接接着していない前記コーティング(C)の外側表面が、試験方法ASTM D7490−13に従って測定した150°より大きい、好ましくは160°より大きい水接触角θを有する、請求項1〜10のいずれか一項に記載のフィルム。
- 前記フィルムが、熱収縮性である、請求項1〜11のいずれか一項に記載のフィルム。
- ASTM D2732に従って測定した85℃での全自由収縮%が、少なくとも45%、好ましくは少なくとも55%、さらにより好ましくは少なくとも60%であることを特徴とする、請求項12に記載のフィルム。
- 請求項1〜13のいずれか一項に記載の超疎水性熱可塑性多層包装フィルムの製造方法であって、前記製造方法が、
i)熱可塑性のコーティングされていない任意に熱収縮可能なフィルム(A)/(B)を提供することと、前記フィルム(A)/(B)は、
−熱可塑性ヒートシール性層(A)と、
−層(A)に直接接着している熱可塑性単層又は多層基材層(B)と
を含み、
層(A)に直接接着していない前記基材層(B)の表面は粗面である、
ii)前記基材層(B)の粗面に疎水性コーティング組成物を塗布することと、
iii)塗布した前記疎水性コーティング組成物を硬化及び/又は乾燥させて、超疎水性コーティング(C)を形成することと、
を含み、
層(B)に直接接着していない前記コーティング(C)の外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する、
製造方法。 - ステップi)において、コーティングされていない前記フィルム(A)/(B)の層(A)に直接接着していない前記基材層(B)の表面が、機械的及び/又は化学的方法による表面処理によって、又は好ましくは前記フィルム(A)/(B)の共押出し時に前記基材層(B)中に微粒子を混入することによって粗化される、請求項14に記載の方法。
- ステップii)において、コーティングされていない前記フィルム(A)/(B)の層(A)に直接接着していない前記基材層(B)の粗面に塗布される疎水性コーティング組成物の量が、4〜50g/m2(湿潤グラム数)である、請求項14又は15に記載の方法。
- シームレスチューブ又はフレキシブル容器の形態で、製品を導入するための少なくとも1つの開口部を有する、可撓性の任意に収縮可能な包装用物品であって、前記物品は、請求項1〜13のいずれか一項に記載のフィルムから製造され、前記物品の最外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する前記コーティング(C)の超疎水性表面である、包装用物品。
- 請求項1〜13のいずれか一項に記載のフィルム又は請求項17に記載の物品が製品を密封する密封パッケージであって、前記パッケージの最外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する前記コーティング(C)の超疎水性表面である、密封パッケージ。
- 前記密封パッケージが、真空収縮されている、請求項18に記載の密封パッケージ。
- 請求項18又は請求項19に記載の密封パッケージを製造するための包装方法であって、前記包装方法が、
−少なくとも1つの開口部を有する、請求項19に記載の任意に収縮可能な包装用物品を提供することと、
−前記開口部から前記物品内に製品を挿入することと、
−任意に真空化した後、前記物品を封止して、任意に真空である密封パッケージを形成することと、
−前記パッケージを熱水に接触させることにより収縮させること、及び/又は
−熱水又は蒸気によりパッケージを低温殺菌又は滅菌することと
を含み、
乾燥ステップなしで乾燥したパッケージを提供することを特徴とする、
包装方法。 - 前記包装された製品が、好ましくは食肉、鳥肉、チーズ、魚、加工肉又は燻製肉、豚肉及び子羊肉、ベビーフードから選択された食品、好ましくはミルク、ワイン、ビール、フルーツジュースから選択された飲料である、請求項18又は19に記載の密封パッケージ又は請求項20に記載の包装方法。
- 前記パッケージの最外側表面が、試験方法ASTM D7490−13に従って測定した130°より大きい水接触角θを有する超疎水性表面である可撓性パッケージを製造するための、請求項1〜13のいずれか一項に記載のフィルムの使用。
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