CN111748119A - 一种环保型超高阻隔涂布膜 - Google Patents

一种环保型超高阻隔涂布膜 Download PDF

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CN111748119A
CN111748119A CN202010643895.6A CN202010643895A CN111748119A CN 111748119 A CN111748119 A CN 111748119A CN 202010643895 A CN202010643895 A CN 202010643895A CN 111748119 A CN111748119 A CN 111748119A
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卿海
高峰
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CHENGDU FULINDA NEW MATERIALS CO LTD
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Abstract

本发明公开了一种环保型超高阻隔涂布膜，包括涂布膜本体、基材层、底涂层、功能层，所述涂布膜本体由基材层、底涂层、功能层组成；本发明,利用高分子链的聚乙烯醇作为主体通过逆向吻涂的涂布方式将PVA均匀涂布在BOPP、PET、PA、PE表面形成致密的PVA薄膜，采用的PVA原材料为高水解度体系，大大降低遇到高湿度时性能降低的风险；通过在涂布PVA前在BOPP、PET、PA、PE表面进行底涂预涂工艺，增加PVA与BOPP基材的附着力，同时解决PVA直接在BOPP、PET、PA、PE上涂布出现缩孔的问题；通过将高分子链的聚乙烯醇和低分子链的聚乙烯醇通过1：2.3进行配比，提高溶液的固含量而不增加溶液的粘度，同时让PVA成膜后具有良好的印刷性能和阻氧性能。

Description

一种环保型超高阻隔涂布膜
技术领域
本发明属于涂布膜技术领域，具体涉及一种环保型超高阻隔涂布膜。
背景技术
PVDC是当今世界上塑料包装中综合阻隔性能最好的一种包装材料。它既不同于聚乙烯醇随着吸湿增加而使阻气性急剧下降，也不同于尼龙膜由于吸水性使阻湿性能变差，而是一种阻湿、阻气皆优的高阻隔性能材料。
PVDC的阻隔性能是普通包装材料的几倍、几十甚至几百倍。因此，用这种材料包装食品，对食品的色、香、味均有优良的保护作用。同时，对于食品的防潮十分有效，可成倍地延长食品保存期，大大减少食品因季节变化等多种因素造成的变质。该材料不但有优异的高阻隔性能，还具有优异的印刷性能、复合透明特性。
现有的超高阻隔涂布膜普遍运用PVDC(聚偏二氯乙烯)在基材上进行涂布，以达到涂布膜具有良好的氧气阻隔性能，其涂层的阻隔性能有一定的局限性只能使基材的阻氧性能达到10cm3/(m2·24h)左右；且此涂层不可降解回收，存在环保问题；其它PVA(聚乙烯醇)涂层采用直接涂布工艺，会导致在涂基材材料上出现缩孔、涂层附着力差、印刷性能差的问题；现有PVA(聚乙烯醇)固含量低普遍在6％的固含量，如再增加固含量会导致溶液粘度增加无法正常涂布，固含量低会出现在涂布过程中涂层不易干燥且上胶量无法达到产品功能得以实现的上胶量。
为了实现涂布材料的环保可降解，提高阻氧性能，为此我们提出一种环保型超高阻隔涂布膜。
发明内容
本发明的目的在于提供一种环保型超高阻隔涂布膜，实现涂布材料的环保可降解，提高阻氧性能。
为实现上述目的，本发明提供如下技术方案：一种环保型超高阻隔涂布膜，包括涂布膜本体、基材层、底涂层、功能层，所述涂布膜本体由基材层、底涂层、功能层组成，所述基材层通过放卷经过涂布一在基材层的表面涂布底涂层，再经过烘干一将底涂层烘干；再经过涂布二将功能层均匀的涂布在底涂层上经过烘干二将功能层烘干收卷，经过后期熟化24小时将底涂完全固化和功能层完全干燥，最后分切入库。
作为本发明的一种优选的技术方案，利用高分子链的聚乙烯醇作为主体通过逆向吻涂的涂布方式将PVA均匀涂布在BOPP、PET、PA、PE表面形成致密的PVA薄膜。
作为本发明的一种优选的技术方案，通过在涂布PVA前在BOPP、PET、PA、PE表面进行底涂预涂工艺(双组份聚氨酯胶水)。
作为本发明的一种优选的技术方案，通过将高分子链的聚乙烯醇和低分子链的聚乙烯醇通过1：2.3进行配比。
作为本发明的一种优选的技术方案，聚乙烯醇高分子链牌号为17-99，低分子链的牌号为05-99。
作为本发明的一种优选的技术方案，还包括收卷揭开机构，该收卷揭开机构包括卷筒和双面粘力条，所述涂布膜本体缠绕于卷筒的外壁，所述涂布膜本体的端部设置有双面粘力条。
与现有技术相比，本发明的有益效果是：
(1)利用高分子链的聚乙烯醇作为主体通过逆向吻涂的涂布方式将PVA均匀涂布在BOPP、PET、PA、PE表面形成致密的PVA薄膜，采用的PVA原材料为高水解度体系，大大降低遇到高湿度时性能降低的风险；
(2)通过在涂布PVA前在BOPP、PET、PA、PE表面进行底涂预涂工艺(双组份聚氨酯胶水)，增加PVA与BOPP、PET、PA、PE基材的附着力，同时解决PVA直接在BOPP、PET、PA、PE上涂布出现缩孔的问题；
(3)通过将高分子链的聚乙烯醇和低分子链的聚乙烯醇通过1：2.3进行配比，提高溶液的固含量而不增加溶液的粘度，同时让PVA成膜后具有良好的印刷性能和阻氧性能；
(4)双面粘力条的上部和涂布膜本体的端部粘合，利用向外凸出的双面粘力条将缠绕在卷筒外壁的涂布膜本体揭开更便利。
附图说明
图1为本发明的涂布膜本体结构示意图；
图2为本发明的收卷结构示意图；
图3为本发明的工艺原理图；
图中：1、涂布膜本体；2、基材层；3、底涂层；4、功能层；5、卷筒；6、双面粘力条。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1、图2和图3，本发明提供一种技术方案：一种环保型超高阻隔涂布膜，包括涂布膜本体1、基材层2、底涂层3、功能层4，涂布膜本体1由基材层2、底涂层3、功能层4组成，基材层2通过放卷经过涂布一在基材层2的表面涂布底涂层3，再经过烘干一将底涂层3烘干；再经过涂布二将功能层4均匀的涂布在底涂层3上经过烘干二将功能层4烘干收卷，经过后期熟化24小时将底涂完全固化和功能层4完全干燥，最后分切入库。
本实施例中，优选的，利用高分子链的聚乙烯醇作为主体通过逆向吻涂的涂布方式将PVA均匀涂布在BOPP、PET、PA、PE表面形成致密的PVA薄膜，采用的PVA原材料为高水解度体系，大大降低遇到高湿度时性能降低的风险。
本实施例中，优选的，通过在涂布PVA前在BOPP、PET、PA、PE表面进行底涂预涂工艺(双组份聚氨酯胶水)，增加PVA与BOPP、PET、PA、PE基材的附着力，同时解决PVA直接在BOPP、PET、PA、PE上涂布出现缩孔的问题。
本实施例中，优选的，通过将高分子链的聚乙烯醇和低分子链的聚乙烯醇通过1：2.3进行配比，提高溶液的固含量而不增加溶液的粘度，同时让PVA成膜后具有良好的印刷性能和阻氧性能(阻氧性能小于1cm3/(m2·24h))。
本实施例中，优选的，聚乙烯醇高分子链牌号为17-99，低分子链的牌号为05-99，达到此方案中PVA涂布液的阻隔和印刷性能。
本实施例中，优选的，还包括收卷揭开机构，该收卷揭开机构包括卷筒5和双面粘力条6，涂布膜本体1缠绕于卷筒5的外壁，涂布膜本体1的端部设置有双面粘力条6，涂布膜本体1缠绕在卷筒5的外壁，拿起双面粘力条6，双面粘力条6的上部和涂布膜本体1的端部粘合，利用向外凸出的双面粘力条6将缠绕在卷筒5外壁的涂布膜本体1揭开更便利。
本发明的工作原理及使用流程：涂布膜本体1由基材层2、底涂层3、功能层4组成，基材层2通过放卷经过涂布一在基材层2的表面涂布底涂层3，再经过烘干一将底涂层3烘干；再经过涂布二将功能层4均匀的涂布在底涂层3上经过烘干二将功能层4烘干收卷，经过后期熟化24小时将底涂完全固化和功能层4完全干燥，最后分切入库；
涂布膜本体1缠绕在卷筒5的外壁，拿起双面粘力条6，双面粘力条6的上部和涂布膜本体1的端部粘合，利用向外凸出的双面粘力条6将缠绕在卷筒5外壁的涂布膜本体1揭开更便利。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (6)

1.一种环保型超高阻隔涂布膜，包括涂布膜本体(1)、基材层(2)、底涂层(3)、功能层(4)，其特征在于：所述涂布膜本体(1)由基材层(2)、底涂层(3)、功能层(4)组成，所述基材层(2)通过放卷经过涂布一在基材层(2)的表面涂布底涂层(3)，再经过烘干一将底涂层(3)烘干；再经过涂布二将功能层(4)均匀的涂布在底涂层(3)上经过烘干二将功能层(4)烘干收卷，经过后期熟化24小时将底涂完全固化和功能层(4)完全干燥，最后分切入库。
2.根据权利要求1所述的一种环保型超高阻隔涂布膜，其特征在于：利用高分子链的聚乙烯醇作为主体通过逆向吻涂的涂布方式将PVA均匀涂布在BOPP、PET、PA、PE表面形成致密的PVA薄膜。
3.根据权利要求1所述的一种环保型超高阻隔涂布膜，其特征在于：通过在涂布PVA前在BOPP、PET、PA、PE表面进行底涂预涂工艺(双组份聚氨酯胶水)。
4.根据权利要求1所述的一种环保型超高阻隔涂布膜，其特征在于：通过将高分子链的聚乙烯醇和低分子链的聚乙烯醇通过1：2.3进行配比。
5.根据权利要求4所述的一种环保型超高阻隔涂布膜，其特征在于：聚乙烯醇高分子链牌号为17-99，低分子链的牌号为05-99。
6.根据权利要求1所述的一种环保型超高阻隔涂布膜，其特征在于：还包括收卷揭开机构，该收卷揭开机构包括卷筒(5)和双面粘力条(6)，所述涂布膜本体(1)缠绕于卷筒(5)的外壁，所述涂布膜本体(1)的端部设置有双面粘力条(6)。
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