JP6800971B2 - 多層樹脂シート及び成形容器 - Google Patents
多層樹脂シート及び成形容器 Download PDFInfo
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- JP6800971B2 JP6800971B2 JP2018523230A JP2018523230A JP6800971B2 JP 6800971 B2 JP6800971 B2 JP 6800971B2 JP 2018523230 A JP2018523230 A JP 2018523230A JP 2018523230 A JP2018523230 A JP 2018523230A JP 6800971 B2 JP6800971 B2 JP 6800971B2
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- 229910052783 alkali metal Inorganic materials 0.000 description 1
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- 125000005907 alkyl ester group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
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- 150000001408 amides Chemical class 0.000 description 1
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- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
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- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- IFDVQVHZEKPUSC-UHFFFAOYSA-N cyclohex-3-ene-1,2-dicarboxylic acid Chemical compound OC(=O)C1CCC=CC1C(O)=O IFDVQVHZEKPUSC-UHFFFAOYSA-N 0.000 description 1
- QYQADNCHXSEGJT-UHFFFAOYSA-N cyclohexane-1,1-dicarboxylate;hydron Chemical compound OC(=O)C1(C(O)=O)CCCCC1 QYQADNCHXSEGJT-UHFFFAOYSA-N 0.000 description 1
- YQLZOAVZWJBZSY-UHFFFAOYSA-N decane-1,10-diamine Chemical compound NCCCCCCCCCCN YQLZOAVZWJBZSY-UHFFFAOYSA-N 0.000 description 1
- 125000004427 diamine group Chemical group 0.000 description 1
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- 125000001142 dicarboxylic acid group Chemical group 0.000 description 1
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- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- QFTYSVGGYOXFRQ-UHFFFAOYSA-N dodecane-1,12-diamine Chemical compound NCCCCCCCCCCCCN QFTYSVGGYOXFRQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 1
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- 235000015203 fruit juice Nutrition 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
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- 230000004927 fusion Effects 0.000 description 1
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- 229920000592 inorganic polymer Polymers 0.000 description 1
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- LDHQCZJRKDOVOX-IHWYPQMZSA-N isocrotonic acid Chemical compound C\C=C/C(O)=O LDHQCZJRKDOVOX-IHWYPQMZSA-N 0.000 description 1
- 150000003951 lactams Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
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- 230000008018 melting Effects 0.000 description 1
- NKHAVTQWNUWKEO-IHWYPQMZSA-N methyl hydrogen fumarate Chemical compound COC(=O)\C=C/C(O)=O NKHAVTQWNUWKEO-IHWYPQMZSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
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- 239000012745 toughening agent Substances 0.000 description 1
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- 235000013618 yogurt Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
Landscapes
- Laminated Bodies (AREA)
Description
(1)水蒸気バリア性樹脂層
高密度ポリエチレン樹脂(以下、HDPE樹脂という):「8050」(台塑公司社製、MI:6.0g/10min.(190℃、2.16kgf))
ポリプロピレン樹脂(以下、PP樹脂という):「HJ730L」(SAMSUNG TOTAL社製、MI:5.0g/10min(190℃、2.16kgf)、IsotacticHomoPP)
(2)酸素バリア性樹脂層
エチレン−ビニルアルコール共重合体(以下、EVOHという): 「エバールJ171B」(クラレ(株)製、MI:1.7g/10min(190℃、2.16kgf)、 エチレン含量32mol%)
(3)接着層
変性オレフィン系重合体(以下、変性POという) :「モディックF502C」(三菱化学社製、MI:1.3g/10min(190℃、2.16kgf)))
(4)スチレン系樹脂層
HIPS樹脂:「4241」(Total Petrochemicals社製、MI:4.0g/10min.(200℃、5.0kgf))
(1)使用機器:浅野研究所社製 真空圧空成形機
(2)加熱ヒーター:非接触式遠赤外線ヒーター
(3)シート表面温度:シート構成により適宜シート表面温度を調整
シートの水蒸気透過率を、以下の方法にて測定した。
[測定方法] GB/T 1037準拠
使用機器:LabThink社製 W3/031
測定条件:40℃×90%R.H.
また、水蒸気透過率を以下の基準で評価した。
水蒸気透過率が3.0g/m2・day以下であれば、多層樹脂シートの水蒸気バリア性が合格であり、水蒸気透過率が3.0g/m2・dayより大きい場合、多層樹脂シートの水蒸気バリア性が不合格であるとしている。
シートの酸素透過率を、以下の方法にて測定した。酸素透過率測定は、以下の高温高湿環境下への投入前後で測定を行った。
[測定方法] GB/T 1038準拠
使用機器:LabThink社製 VAC−V1
測定条件:23℃×65%R.H.
サンプルセット:基本的に、容器成形後の実用性を鑑みて、シートサンプルの基材層側から酸素が透過するような向きにサンプルをセットする。
[高温高湿環境投入]
シートの端部からの水蒸気浸透の影響を排除する目的として、シートの端部にアルミ製粘着テープを貼付し、端部が高温高湿環境下に触れない状態で40℃×90%R.H.環境下にシートを6時間投入した。環境投入前後の酸素透過率を測定した。
また、酸素透過率を以下の基準で評価した。
酸素透過率が5.0cc/m2・day以下であれば、多層樹脂シートの酸素バリア性が合格であり、酸素透過率が5.0cc/m2・dayより大きい場合、多層樹脂シートの酸素バリア性が不合格であるとしている。
さらに、高温高湿環境投入前後の酸素透過率の差に対しても以下の基準で評価した。
高温高湿環境投入前後の酸素透過率の差異が1.0cc/m2・day以下であれば、多層樹脂シートの酸素バリア性が合格であり、高温高湿環境投入前後の酸素透過率の差異が1.0cc/m2・dayより大きい場合、多層樹脂シートの酸素バリア性が不合格であるとしている。
容器用の成形金型を用いて、図3に示す成形容器を熱成形する際の成形性を、以下の基準で評価した。
A:成形性良好
B:成形後の容器の一部に厚みの薄い箇所が見られる
C:成形金型通りの賦形性が得られていない。若しくは成形外観不良が見られる。
<実施例1>
<実施例2>
<実施例3>
<実施例4>
<実施例5>
<実施例6>
<実施例7>
<比較例1>
<比較例2>
当該比較例から得た多層樹脂シートに対し、その水蒸気透過率測定を行った結果、表2に示すように、その水蒸気透過率が1.1g/m2・dayとなっている。また、その酸素透過率測定を行った結果、表2に示すように、その高温高湿環境投入前の酸素透過率が0.25cc/m2・dayであり、その高温高湿環境投入後の酸素透過率が0.43cc/m2・dayであり、高温高湿環境投入前後の酸素透過率の差異が0.18cc/m2・dayになっている。さらに、当該多層樹脂シートを用いて成形される容器の成形性を評価したところ、成形性がBランクと評価された。
<比較例3>
<比較例4>
<比較例5>
Claims (7)
- 酸素バリア性樹脂層の両面に、接着層を介して水蒸気バリア性樹脂層が積層され、一方側の水蒸気バリア性樹脂層に、スチレン系樹脂層が積層されてなる多層樹脂シートにおいて、
前記水蒸気バリア性樹脂層はオレフィン系樹脂から構成された層であり、その酸素バリア性樹脂層の両面に積層された水蒸気バリア性樹脂層の厚さの合計が50〜300μmであり、前記スチレン系樹脂層の厚さが200〜900μmであり、前記スチレン系樹脂層は、ブタジエンゴム成分を4〜8質量%含有するハイインパクトポリスチレン(HIPS)のみから形成されていることを特徴とする多層樹脂シート。 - 前記多層樹脂シートはその高温高湿環境下に投入する前と投入した後の酸素透過率の差異が1.0cc/m2・day以下を維持していることを特徴とする請求項1に記載の多層樹脂シート。
- 前記多層樹脂シートはその酸素透過率が5.0cc/m2・day以下を維持し、且つその水蒸気透過率が3.0g/m2・day以下を維持していることを特徴とする請求項1または2に記載の多層樹脂シート。
- 前記酸素バリア性樹脂層の厚みは10〜50μmに設定されていることを特徴とする請求項1または2に記載の多層樹脂シート。
- 前記各接着層の厚みは、それぞれ10〜50μmに設定されていることを特徴とする請求項1または2に記載の多層樹脂シート。
- 多層樹脂シートの厚みが500〜1200μmを有することを特徴とする請求項1または2に記載の多層樹脂シート。
- 請求項1から6のいずれか一項に記載の多層樹脂シートを用いて成形してなる成形容器。
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