CN112895645A - Bopp高阻隔复合薄膜及其制备方法 - Google Patents

Bopp高阻隔复合薄膜及其制备方法 Download PDF

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CN112895645A
CN112895645A CN202110125606.8A CN202110125606A CN112895645A CN 112895645 A CN112895645 A CN 112895645A CN 202110125606 A CN202110125606 A CN 202110125606A CN 112895645 A CN112895645 A CN 112895645A
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bopp
composite film
barrier composite
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barrier
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翁晓锋
帖玮婷
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Zhejiang Lanye Film Co ltd
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Zhejiang Lanye Film Co ltd
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    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
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    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
    • C23C14/562—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks for coating elongated substrates
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Abstract

本发明涉及BOPP薄膜，公开了一种BOPP高阻隔复合薄膜及其制备方法，其包括以下步骤：步骤一、制备BOPP薄膜，得到溶体一；步骤二、选取乙烯与乙烯醇的共聚物，使其置于辅挤出机中加热成熔融状态，得到溶体二；步骤三、将步骤一中的溶体一与步骤二中的溶体二置于双层挤出机的摸头中汇合挤出，得到BOPP基材片；步骤四、蒸镀加工使得BOPP基材片表面连接有镀层；步骤五、纵向拉伸；步骤六、横向拉伸。本发明所制得的BOPP高阻隔复合薄膜通过设置阻隔层以及表面镀铝层，具有优良的阻隔性以及更好的蒸镀面处理强度。

Description

BOPP高阻隔复合薄膜及其制备方法
技术领域
本发明涉及一种BOPP复合薄膜，尤其涉及了一种BOPP高阻隔复合薄膜及其制备方法。
背景技术
BOPP薄膜的生产是将高分子聚丙烯的熔体首先通过狭长机头制成片材或厚膜，然后在专用的拉伸机内，在一定的温度和设定的速度下，同时或分步在垂直的两个方向(纵向、横向)上进行的拉伸，并经过适当的冷却或热处理或特殊的加工(如电晕、涂覆等)制成的薄膜，BOPP薄膜是一种非常重要的软包装材料，BOPP薄膜无色、无嗅、无味、无毒，并具有高拉伸强度、冲击强度、刚性、强韧性和良好的透明性。
目前，市场上的BOPP复合薄膜一般均是采用BOPP薄膜与其他材质复合而成，其能够具有更好的化学性能，但是BOPP复合薄膜的用途以及使用范围仍然具有较大的限制，其化学性能，特别是对于氧气、水蒸气、液体以及气体等小分子物质的渗透性能均有待进一步提高。
发明内容
本发明针对现有技术中BOPP复合薄膜存在的问题，提供了一种BOPP高阻隔复合薄膜及其制备方法。
为了解决上述技术问题，本发明通过下述技术方案得以解决：
BOPP高阻隔复合薄膜的制备方法，其包括以下步骤：
步骤一、制备BOPP薄膜，并将BOPP薄膜用聚丙烯母料以及钛白粉母料共混后置于主挤出机中加热成熔融状态，得到溶体一；
步骤二、选取乙烯与乙烯醇的共聚物，使其置于辅挤出机中加热成熔融状态，得到溶体二；
步骤三、将步骤一中的溶体一与步骤二中的溶体二置于双层挤出机的摸头中汇合挤出，得到BOPP基材片；
步骤四、将BOPP基材片置于真空蒸镀蒸发室内进行蒸镀加工使得BOPP基材片表面连接有镀层，蒸发室内温度为1400-1500℃；
步骤五、将步骤四中连接有镀层的BOPP基材片加热到110-125℃，保温20min后纵向拉伸，然后进行热定型；
步骤六、将步骤五得到的BOPP基材片加热到150-160℃后进行横向拉伸，然后进行热定型，得到BOPP高阻隔复合薄膜。
作为优选，所述的步骤一中聚丙烯母料以及钛白粉母料的重量百分比相同，均为5-10％。
作为优选，步骤三中双层挤出机的摸头温度为220-260℃。
作为优选，步骤四中的镀层为镀氧化铝薄膜层，厚度为500-600埃米。
作为优选，步骤六中BOPP高阻隔复合薄膜包括由溶体一构成的内表层、由溶体二构成的中间阻隔层以及由镀氧化铝薄膜层构成的外表层，其中内表层的厚度为4-5um，阻隔层的厚度为10-20um。
BOPP高阻隔复合薄膜，其上述的BOPP高阻隔复合薄膜的制备方法制得。
本发明由于采用了以上技术方案，具有显著的技术效果：
本发明所制得的BOPP高阻隔复合薄膜通过设置阻隔层以及表面镀铝层，具有优良的阻隔性以及更好的蒸镀面处理强度。
具体实施方式
实施例1
BOPP高阻隔复合薄膜的制备方法，其包括以下步骤：
步骤一、制备BOPP薄膜，并将BOPP薄膜用聚丙烯母料以及钛白粉母料共混后置于主挤出机中加热成熔融状态，得到溶体一，其中聚丙烯母料以及钛白粉母料的重量百分比相同，均为5％；
步骤二、选取乙烯与乙烯醇的共聚物，使其置于辅挤出机中加热成熔融状态，得到溶体二；
步骤三、将步骤一中的溶体一与步骤二中的溶体二置于双层挤出机的摸头中汇合挤出，双层挤出机的摸头温度为220℃，得到BOPP基材片；
步骤四、将BOPP基材片置于真空蒸镀蒸发室内进行蒸镀加工使得BOPP基材片表面连接有镀氧化铝薄膜层，蒸发室内温度为1400℃；
步骤五、将步骤四中连接有镀层的BOPP基材片加热到110℃，保温20min后纵向拉伸，然后进行热定型；
步骤六、将步骤五得到的BOPP基材片加热到150℃后进行横向拉伸，然后进行热定型，得到BOPP高阻隔复合薄膜。
步骤六中BOPP高阻隔复合薄膜包括由溶体一构成的内表层、由溶体二构成的中间阻隔层以及由镀氧化铝薄膜层构成的外表层，其中内表层的厚度为4um，阻隔层的厚度为10um，镀层厚度为500埃米。
本实施例中进行热定型是为了能够有效的消除部分应力，其具体热定型方法为本领域的常规方法和条件。
本实施例中阻隔层为乙烯与乙烯醇的共聚物，其为极性材料，能够使得最终制得BOPP高阻隔复合薄膜的阻隔性能相较于一般的阻隔性能更佳，其氧气投过量相较一般BOPP薄膜能够减少10倍以上，水蒸气透过量能够减少3倍以上。
另外由于设置了该阻隔层，能够使得该BOPP高阻隔复合薄膜相较于一般BOPP镀铝膜具有更好的蒸镀面处理强度，因此，本实施例中制得的BOPP高阻隔复合薄膜具有更高的阻隔性和更高的处理强度。
实施例2
BOPP高阻隔复合薄膜的制备方法，其包括以下步骤：
步骤一、制备BOPP薄膜，并将BOPP薄膜用聚丙烯母料以及钛白粉母料共混后置于主挤出机中加热成熔融状态，得到溶体一，其中聚丙烯母料以及钛白粉母料的重量百分比相同，均为10％；
步骤二、选取乙烯与乙烯醇的共聚物，使其置于辅挤出机中加热成熔融状态，得到溶体二；
步骤三、将步骤一中的溶体一与步骤二中的溶体二置于双层挤出机的摸头中汇合挤出，双层挤出机的摸头温度为260℃，得到BOPP基材片；
步骤四、将BOPP基材片置于真空蒸镀蒸发室内进行蒸镀加工使得BOPP基材片表面连接有镀氧化铝薄膜层，蒸发室内温度为1500℃；
步骤五、将步骤四中连接有镀层的BOPP基材片加热到125℃，保温20min后纵向拉伸，然后进行热定型；
步骤六、将步骤五得到的BOPP基材片加热到160℃后进行横向拉伸，然后进行热定型，得到BOPP高阻隔复合薄膜。
步骤六中BOPP高阻隔复合薄膜包括由溶体一构成的内表层、由溶体二构成的中间阻隔层以及由镀氧化铝薄膜层构成的外表层，其中内表层的厚度为5um，阻隔层的厚度为20um，镀层厚度为600埃米。
实施例3
BOPP高阻隔复合薄膜，其采用实施例1或实施例2中的BOPP高阻隔复合薄膜的制备方法制得。
总之，以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所作的均等变化与修饰，皆应属本发明专利的涵盖范围。

Claims (6)

1.BOPP高阻隔复合薄膜的制备方法，其特征在于其包括以下步骤：
步骤一、制备BOPP薄膜，并将BOPP薄膜用聚丙烯母料以及钛白粉母料共混后置于主挤出机中加热成熔融状态，得到溶体一；
步骤二、选取乙烯与乙烯醇的共聚物，使其置于辅挤出机中加热成熔融状态，得到溶体二；
步骤三、将步骤一中的溶体一与步骤二中的溶体二置于双层挤出机的摸头中汇合挤出，得到BOPP基材片；
步骤四、将BOPP基材片置于真空蒸镀蒸发室内进行蒸镀加工使得BOPP基材片表面连接有镀层，蒸发室内温度为1400-1500℃；
步骤五、将步骤四中连接有镀层的BOPP基材片加热到110-125℃，保温20min后纵向拉伸，然后进行热定型；
步骤六、将步骤五得到的BOPP基材片加热到150-160℃后进行横向拉伸，然后进行热定型，得到BOPP高阻隔复合薄膜。
2.根据权利要求1所述的BOPP高阻隔复合薄膜的制备方法，其特征在于：所述的步骤一中聚丙烯母料以及钛白粉母料的重量百分比相同，均为5-10％。
3.根据权利要求1所述的BOPP高阻隔复合薄膜的制备方法，其特征在于：步骤三中双层挤出机的摸头温度为220-260℃。
4.根据权利要求1所述的BOPP高阻隔复合薄膜的制备方法，其特征在于：步骤四中的镀层为镀氧化铝薄膜层，厚度为500-600埃米。
5.根据权利要求4所述的BOPP高阻隔复合薄膜的制备方法，其特征在于：步骤六中BOPP高阻隔复合薄膜包括由溶体一构成的内表层、由溶体二构成的中间阻隔层以及由镀氧化铝薄膜层构成的外表层，其中内表层的厚度为4-5um，阻隔层的厚度为10-20um。
6.BOPP高阻隔复合薄膜，其特征在于，其采用权利要求1-5任意一项所述的BOPP高阻隔复合薄膜的制备方法制得。
CN202110125606.8A 2021-01-29 2021-01-29 Bopp高阻隔复合薄膜及其制备方法 Pending CN112895645A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152579A (zh) * 2010-12-21 2011-08-17 福融辉实业（福建）有限公司 一种共挤双向拉伸复合薄膜及其制备方法
CN106476384A (zh) * 2016-12-09 2017-03-08 闽南师范大学 一种新型环保型高阻隔cpp薄膜及其制备方法
CN211968714U (zh) * 2019-12-25 2020-11-20 苏州昆岭薄膜工业有限公司 一种高阻隔白色bopp镀铝膜

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152579A (zh) * 2010-12-21 2011-08-17 福融辉实业（福建）有限公司 一种共挤双向拉伸复合薄膜及其制备方法
CN106476384A (zh) * 2016-12-09 2017-03-08 闽南师范大学 一种新型环保型高阻隔cpp薄膜及其制备方法
CN211968714U (zh) * 2019-12-25 2020-11-20 苏州昆岭薄膜工业有限公司 一种高阻隔白色bopp镀铝膜

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