JP6862804B2 - ガスバリア積層体及びその製造方法 - Google Patents
ガスバリア積層体及びその製造方法 Download PDFInfo
- Publication number
- JP6862804B2 JP6862804B2 JP2016234417A JP2016234417A JP6862804B2 JP 6862804 B2 JP6862804 B2 JP 6862804B2 JP 2016234417 A JP2016234417 A JP 2016234417A JP 2016234417 A JP2016234417 A JP 2016234417A JP 6862804 B2 JP6862804 B2 JP 6862804B2
- Authority
- JP
- Japan
- Prior art keywords
- gas barrier
- barrier layer
- zinc
- laminate
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
アクリルポリオールとトリイジルイソシアネートを、アクリルポリオールのOH基に対してNCO基が等量となるように加え、全固形分が5質量%になるよう酢酸エチルで希釈した。更にこれにβ−(3,4エポキシシクロヘキシル)トリメトキシシランを全固形分に対し5質量%添加して混合し、密着層形成用の塗液(コーティング液)を得た。
基材フィルムとしての二軸延伸ポリエチレンテレフタレートフィルム(PET:東レ製、ルミラー(登録商標)P60、厚さ12μm)のコロナ処理側に、上記密着層形成用塗液を用いて乾燥後の膜厚が0.1μmとなるようにグラビアコート機で塗布、乾燥して密着層を形成した。次に、密着層の上に電子線加熱方式による真空蒸着装置により、珪素を蒸発させ、そこに酸素ガスを導入し、酸化珪素を蒸着して厚さ20nmの無機蒸着層を形成した。次に、この無機蒸着層上に、下記ガスバリア層形成用塗液を用いて乾燥後の膜厚が0.35μmとなるようにグラビアコート機で塗布、乾燥してガスバリア層を形成することによりガスバリア積層体を得た。ガスバリア層の亜鉛含有量は、ガスバリア層質量基準で6質量%であった。
(A)塩化亜鉛4.8質量部と、テトラエトキシシラン(TEOS)169.2質量部と、メタノール51.0質量部と、塩酸(0.1N)40.8質量部とを30分間撹拌して加水分解させた固形分5質量%(SiO2換算)の加水分解溶液
(B)ポリビニルアルコール(PVA)の5質量%水/メタノール溶液{水:メタノール=95:5(質量比)}
これらをA:B=54:46(質量比)で混合し、ガスバリア層形成用塗液を調製した。
ガスバリア層形成用塗液を調製するにあたり、最終的に形成されるガスバリア層の亜鉛含有量がガスバリア層質量基準で1質量%となるように、塩化亜鉛の量を変更したことの他は、実施例1と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液を調製するにあたり、最終的に形成されるガスバリア層の亜鉛含有量がガスバリア層質量基準で2質量%となるように、塩化亜鉛の量を変更したことの他は、実施例1と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液を調製するにあたり、最終的に形成されるガスバリア層の亜鉛含有量がガスバリア層質量基準で3質量%となるように、塩化亜鉛の量を変更したことの他は、実施例1と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液の塗布量を変更し、ガスバリア層の厚さを0.35μmとする代わりに、0.7μmとしたことの他は、実施例4と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液を調製するにあたり、塩化亜鉛を使用しなかったことの他は、実施例1と同様にしてガスバリア積層体を得た。
密着層の上に酸化珪素の無機蒸着層を形成する代わりに、酸化アルミニウムの無機蒸着層(厚さ20nm)を形成したことの他は、実施例2と同様にしてガスバリア積層体を得た。酸化アルミニウムの無機蒸着層は、電子線加熱方式による真空蒸着装置により、金属アルミニウムを蒸発させ、そこに酸素ガスを導入し、酸化アルミニウムを密着層に蒸着させることによって形成した。
ガスバリア層形成用塗液を調製するにあたり、最終的に形成されるガスバリア層の亜鉛含有量がガスバリア層質量基準で2質量%となるように、塩化亜鉛の量を変更したことの他は、実施例6と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液を調製するにあたり、最終的に形成されるガスバリア層の亜鉛含有量がガスバリア層質量基準で3質量%となるように、塩化亜鉛の量を変更したことの他は、実施例6と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液の塗布量を変更し、ガスバリア層の厚さを0.35μmとする代わりに、0.7μmとしたことの他は、実施例8と同様にしてガスバリア積層体を得た。
ガスバリア層形成用塗液を調製するにあたり、塩化亜鉛を使用しなかったことの他は、実施例6と同様にしてガスバリア積層体を得た。
ガスバリア層形成用の塗液として、以下のようにして調製したものを使用したことの他は実施例6と同様にしてガスバリア積層体を得た。ガスバリア層の亜鉛含有量は、ガスバリア層質量基準で6質量%であった。
<ガスバリア層形成用組成物の調整>
(A)塩化亜鉛4.8質量部と、テトラエトキシシラン(TEOS)163.6質量部と、メタノール66.8質量部と、塩酸(0.1N)53.4質量部とを30分間撹拌して加水分解させた固形分5質量%(SiO2換算)の加水分解溶液
(B)ポリビニルアルコールの5wt%水/メタノール溶液{水:メタノール=95:5(質量比)}
(C)1,3,5−トリス(3−トリメトキシシリルプロピル)イソシアヌレートを水/イソプロピルアルコール溶液=1/1溶液で、固形分5%(質量比R1Si(OH3)換算)に希釈調整した水溶液(シランカップリング剤(SC))
これらをA:B:C=55:45:15(質量比)で混合し、ガスバリア層形成用塗液を調製した。
実施例1〜10及び比較例1,2で得られたガスバリア積層体について、以下の方法により酸素ガスバリア性(レトルト処理前後)及びレトルト臭(硫化水素濃度による代替評価)の測定及び評価を行った。結果を表1及び表2に示す。
実施例1〜10及び比較例1,2で得られたそれぞれのガスバリア積層体のガスバリア層上に、未延伸ポリプロピレンフィルム(CPP:東レフィルム加工社製:CPP、トレファンNO ZK207、厚さ70μm)を、二液型の接着剤(三井化学製A525/A52)を用いて、ドライラミネート法によってラミネートして包装体形成用のラミネートフィルムを得た。
酸素透過度(レトルト処理前及びレトルト処理後)は、酸素透過度測定装置(ModernControl社製OXTRAN2/20)を用いて、温度30℃、相対湿度70%の条件で測定した。測定方法は、JISK−7126、B法(等圧法)に準拠し、測定値は単位[cc/m2・day・MPa]で表記した。
[L−システイン水溶液が加熱処理されたときの硫化水素濃度の測定]
実施例1〜10及び比較例1,2で得られたそれぞれのガスバリア積層体のガスバリア層上に、未延伸ポリプロピレンフィルム(CPP:東レフィルム加工社製:CPP、トレファンNO ZK207、厚さ70μm)を、二液硬化型ウレタン接着剤(三井化学製A525/A52)を用いて、ドライラミネート法によってラミネートして包装体形成用のラミネートフィルムを得た。
実施例1で得られたガスバリア積層体のガスバリア層上に、未延伸ポリプロピレンフィルム(CPP:東レフィルム加工社製:CPP、トレファンNO ZK207、厚さ70μm)を、二液型の接着剤(三井化学製A525/A52)を用いて、ドライラミネート法によってラミネートして包装体形成用のラミネートフィルムを得た。
Claims (4)
- 基材フィルム又はこれを含む積層体の表面上に、亜鉛イオンと、金属アルコキシド及びその加水分解物の少なくとも一方と、水溶性高分子とを含む塗膜を形成する工程と、
前記塗膜を乾燥させることによって前記表面上にガスバリア層を形成する工程と、
を含み、
前記ガスバリア層の亜鉛含有量は、当該ガスバリア層の質量基準で1〜10質量%である、ガスバリア積層体の製造方法。 - 前記塗膜の亜鉛イオン源が塩化亜鉛である、請求項1に記載のガスバリア積層体の製造方法。
- 基材フィルム又はこれを含む積層体と、
前記基材フィルム又はこれを含む積層体の表面上に設けられたガスバリア層と、
を備え、
前記ガスバリア層は、前記ガスバリア層内に分散している亜鉛と、有機−無機複合体とを含み、
前記ガスバリア層の亜鉛含有量は、当該ガスバリア層の質量基準で1〜10質量%である、ガスバリア積層体。 - 基材フィルム又はこれを含む積層体と、
前記基材フィルム又はこれを含む積層体の表面上に設けられたガスバリア層と、
を備え、
前記ガスバリア層は、前記表面上に形成された塗膜を乾燥させることによって設けられたものであり、
前記塗膜は、亜鉛イオンと、金属アルコキシド及びその加水分解物の少なくとも一方と、水溶性高分子とを含み、
前記ガスバリア層の亜鉛含有量は、当該ガスバリア層の質量基準で1〜10質量%である、ガスバリア積層体。
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