JP6801433B2 - ガスバリア性フィルム - Google Patents
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Description
図1は、本発明の一実施形態に係るガスバリア性フィルムの模式断面図である。図1において、ガスバリア性フィルム10は、高分子フィルム1、アンカーコート層2、金属酸化物層3、及びガスバリア性被覆層4を備えており、高分子フィルム1、アンカーコート層2、金属酸化物層3、及びガスバリア性被覆層4がこの順で積層されている。
(参考例1)
ガスバリア性フィルムをロールtoロール方式で以下のように作製した。まず、厚さ12μmのポリエチレンテレフタレートフィルム基材(高分子フィルム、P60(商品名)、東レ株式会社製)を、巻き出し装置、搬送装置、及び巻き取り装置に装着した。次に、カルボキシル基を有しないアクリルポリオール樹脂溶液にフタル酸を加え、これらを反応させることにより、カルボキシル基を有するアクリルポリオール樹脂溶液を得た。搬送中のポリエチレンテレフタレートフィルム基材上に、上記樹脂溶液をグラビアコート法により塗布した。塗膜を120℃10秒間加熱し、乾燥させることにより、厚さ50nmのアンカーコート層を形成した。ポリエチレンテレフタレートフィルム基材上にアンカーコート層を形成して得られた積層体を巻き取り、ロールの状態で保管した。
アクリルポリオール樹脂溶液にフタル酸を加え、これらを反応させることにより、カルボキシル基を有するアクリルポリオール樹脂溶液を得た。次に、上記樹脂溶液にポリイソシアネートを混合し、アクリルポリオール樹脂7質量部に対してポリイソシアネートが3質量部となるように混合液を調製した。ポリエチレンテレフタレートフィルム基材上に、上記樹脂溶液に代えて、上記混合液を塗布したこと以外は参考例1と同様にして、実施例2のガスバリア性フィルムを作製した。
金属酸化物層として、AlOx膜に代えて、SiOx膜を形成し、その膜厚を30nmにしたこと以外は、実施例2と同様にして、実施例3のガスバリア性フィルムを作製した。
アンカーコート層の膜厚を400nmに変えたこと以外は、実施例2と同様にして、実施例4のガスバリア性フィルムを作製した。
アクリルポリオール樹脂4質量部に対してポリイソシアネートが6質量部となるように混合液を調製したこと以外は、実施例2と同様にして、実施例5のガスバリア性フィルムを作製した。
アクリルポリオール樹脂2質量部に対してポリイソシアネートが8質量部となるように混合液を調製したこと以外は、実施例2と同様にして、参考例6のガスバリア性フィルムを作製した。
実施例2においてカルボキシル基を有するアクリルポリオール樹脂の製造に用いた、カルボキシル基を有しないアクリルポリオール樹脂にポリイソシアネートを混合し、アクリルポリオール樹脂5質量部に対してポリイソシアネートが5質量部となるように混合液を調製したこと以外は、実施例2と同様にして、比較例1のガスバリア性フィルムを作製した。
ポリエチレンテレフタレートフィルム基材上に、上記混合液に代えて、実施例2で用いたポリイソシアネートと同じポリイソシアネートのみからなる溶液を塗布したこと以外は実施例2と同様にして、比較例2のガスバリア性フィルムを作製した。
アクリルポリオール樹脂5質量部に対してポリイソシアネートが5質量部となるように混合液を調製したこと、及び、厚さが10nmとなるようアンカーコート層を形成したこと以外は、実施例2と同様にして、比較例3のガスバリア性フィルムを作製した。
(N/C比)
実施例及び比較例で得られた積層体(ポリエチレンテレフタレートフィルム基材とアンカーコート層との積層体)のアンカーコート層側の表面を、日本電子株式会社製のX線光電子分光分析装置JPS−9030を用いて分析し、X線光電子分光スペクトルを得た。X線源として非単色化MgKα(1253.6eV)を使用し、X線出力を100W(10kV−10mA)として分析した。N/C比は、X線光電子分光スペクトルのN1sピークの合計面積とC1sピークの合計面積との比から算出した。N/C比は、相対感度因子をそれぞれO1sで2.28、N1sで1.61、C1sで1.00として算出した。
実施例及び比較例で長さ50m分巻き取られたロール状積層体(ポリエチレンテレフタレートフィルム基材とアンカーコート層との積層体)を室温40℃の恒温槽に1日間保管した。その後、積層体の巻き出しを行い、積層体を巻き出す際に、積層体同士が容易に剥離でき、ブロッキングが生じていないと判断できる場合を「B」とし、積層体を巻き出す際に、積層体同士の剥離が容易ではない、剥離時に過剰な剥離音が生じる、又は、一方の積層体を構成する層の一部が他方の積層体に転写する等の問題が生じ、ブロッキングが生じていると判断できる場合を「A」として評価した。耐ブロッキング性の評価結果を表1に示す。
実施例及び比較例で得られたガスバリア性フィルムを幅1cmの短冊状にカットし、ガスバリア性フィルムの金属酸化物層側をLLDPE(直鎖状低密度ポリエチレン)フィルム上に接着剤にて貼り合わせた。短冊状のガスバリア性フィルムの高分子フィルム側を、テンシロン引張試験機(オリエンテック社製)を用いて、高分子フィルムとLLDPEフィルムとが反対側に向かうように、300mm/分の速度で、LLDPEフィルムから剥離し、剥離に要した強度を測定した。ガスバリア性フィルムの密着性を下記基準にしたがって評価した。密着性の評価結果を表1に示す。
A:剥離強度が2N/cm以上である。
B:剥離強度が2N/cm未満である。
実施例及び比較例で得られたガスバリア性フィルムを260mm×130mm(MD×TD)のサイズに切り出した。切り出したガスバリア性フィルムを、延伸部の長さ(MD方向)が200mmになるように延伸装置に取付け、バネ秤を用いてMD方向に1.2kgfの初期張力をかけた。ステージ移動速度を0.1mm/秒として2%の延伸倍率までガスバリア性フィルムをMD方向に引っ張り、引っ張った状態で1分間保持後、同じ速度でステージを初期位置に移動させた。以上のようにして、延伸後のガスバリア性フィルムを得た。
Claims (4)
- 高分子フィルムと、アンカーコート層と、金属酸化物層とを備え、
前記高分子フィルムと前記金属酸化物層とが前記アンカーコート層を介して積層されており、
前記アンカーコート層の厚さが25nm以上であり、
前記アンカーコート層が、有機酸基を有するアクリル樹脂を含む組成物の硬化物からなる層であり、
前記組成物がポリイソシアネートをさらに含み、
前記アクリル樹脂がアクリルポリオール樹脂であり、
前記組成物における、前記アクリルポリオール樹脂の含有量M A と前記ポリイソシアネートの含有量M I との比M A /M I は、質量比で、4/6以上であり、
前記金属酸化物層がSi原子又はAl原子を含有し、真空成膜により形成されている、ガスバリア性フィルム。 - 前記アンカーコート層をX線光電子分光法にて分析して得られる窒素原子と炭素原子との原子比N/Cは0以上0.5未満である、請求項1に記載のガスバリア性フィルム。
- 前記アンカーコート層の厚さが600nm未満である、請求項1又は2に記載のガスバリア性フィルム。
- ガスバリア性被覆層をさらに備え、
前記ガスバリア性被覆層が前記金属酸化物層の前記アンカーコート層とは反対側の面上に設けられている、請求項1〜3のいずれか一項に記載のガスバリア性フィルム。
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EP17885109.3A EP3560708A4 (en) | 2016-12-20 | 2017-12-18 | GAS BARRIER FILM |
PCT/JP2017/045375 WO2018117043A1 (ja) | 2016-12-20 | 2017-12-18 | ガスバリア性フィルム |
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WO2018117043A1 (ja) | 2018-06-28 |
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