CN107722859A - 高透光性复合阻隔膜 - Google Patents
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Abstract
本发明公开了一种高透光性复合阻隔膜，所述阻隔膜依次包括基材层、氧化物层以及胶水层。本发明提供了一种高透光性复合阻隔膜，通过于现有技术上设置胶水层，实现阻隔膜的双层或多层复合，而且可以卷对卷直接生产，不但成本降低，而且可以根据实际需要来满足个性化需求，亦防止了氧化层的磨损脱落而失去相应的阻隔性能，同时也利于附着多功能涂层。
Description
技术领域
本发明具体涉及一种高透光性复合阻隔膜。
背景技术
近年来，随着柔性材料在显示和太阳能领域的不断应用，对具有高的水汽、氧气阻隔性能的薄膜材料的研究越来越多，常用的方法是用气相沉积（CVD）、等离子增加化学气相沉积（PECVD）或者磁控溅射（Sputter）等方法将氧化物（如氧化硅、氧化铝等）镀在聚酯薄膜上。这些阻隔膜作为玻璃替代柔性材料在显示、照明和太阳能市场上具有多种应用。
因为在有机聚酯薄膜上快速镀无机氧化物，镀一层氧化物阻隔性能可达到水汽透过率（WVTR）和氧气透过率（OTR）在1g/m2.day左右，而在显示、照明和太阳能领域，对阻隔性能的需求在10-2-10-3g/m2.day或者更高。现有的单层镀无氧化物膜已不能满足市场对于阻梗性能的需求。除此之外，市场上常见的具有高阻隔性的复合膜为尼龙薄膜与镀铝膜或聚乙烯层复合，整体透光性差，或者是PVDC、EVOH等纯有机膜复合，阻隔性只能达到1g/m2.day，满足不了显示、照明和太阳能领域对阻隔性能的需求。
专利号为CN201210269970.2的专利提出了一种阻隔复合膜，专利方案采用高阻隔尼龙薄膜层、镀铝对苯二甲酸乙二醇酯层、第二高阻隔尼龙薄膜层和聚乙烯层的结构设计，实现了水汽透过率（WVTR）和氧气透过率（OTR）在10-1g/m2.day，阻隔性能还较小，且在高温使用条件下阻隔性会进一步降低，并且其没有光学指标考量。
发明专利CN201180073350.5 揭示了一种阻隔材料和膜，通过填料表面上的多孔结晶性电荷转移络合物的方式实现了水蒸气透过率40~70g/m2.day，氧气透过率0.2~20cc/m2.day的可用于食品包装的复合阻隔膜。
CN201410054673.5提出了一种有机无机杂化的高阻隔膜及其制备方法，包括沉积在基材表面上的有机无机杂化阻隔层，所述有机无机杂化阻隔层包括杂化了碳氢化合物的硅氧化合物和或硅氮化合物，并且有机成分与无机成分的相对比例在厚度方向上周期性变化。该方案可以实现较高的阻隔性，但是多次镀膜成本较高，且其多层氧化物的粘结对设备和工艺要求较高，产能不高，且多层无机物层叠加导致膜片卷曲时候容易折损，破坏其阻隔层。
发明内容
针对上述技术问题，本发明的目的是提供一种具有优异阻隔性能、高透光性、制造成本低、使用灵活的复合阻隔膜。
所述阻隔膜依次包括基材层、氧化物层以及胶水层。
在其中一个实施例中，附着于胶水层的外表面上还设有一硬化雾面层，硬度大于等于2HB。
在其中一个实施例中，附着于基材层的外表面亦设有一胶水层，附着于胶水层的外表面附着于一易接着层；所述易接着层材质选取为聚氨酯、聚丙烯酸酯或聚酯化合物的一种。
在其中一个实施例中，所述基材层的材质为PET，厚度为6-50μm，透光率大于80%。
在其中一个实施例中，所述胶水层通过紫外固化或高温固化设置于氧化物层外表面或基材层外表面。
在其中一个实施例中，所述胶水层为聚酯、环氧树脂、丙烯酸树脂或有机硅类的一种。
在其中一个实施例中，所述胶水层的厚度为0.1-100μm。
优选的，所述胶水层的厚度为0.5-10μm。
在其中一个实施例中，所述氧化物层的厚度为20-80μm。
本发明提供了一种高透光性复合阻隔膜，通过于现有技术上设置胶水层，实现阻隔膜的双层或多层复合，而且可以卷对卷直接生产，不但成本降低，而且可以根据实际需要来满足租个需求，亦防止了氧化层的磨损脱落，也利用附着多功能涂层。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍。
图1为本发明第一使用方式的结构图；
图2为本发明第二使用方式的结构图；
图3为本发明第三使用方式的结构图；
图4为本发明第四使用方式的结构图。
图中数字表示：
1、基材层 2、氧化物层 3、胶水层 4、易接着层 5、硬化雾面层。
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。
实施例1：
图1所示，本实施例提出了一种高透光性复合阻隔膜，其由下到上依次由PET制成的基材层1、氧化铝材质的氧化物层2和聚酯材质的胶水层3组成；PET的厚度为30μm，氧化物层2厚度35微米，胶水层3的厚度为5微米；经过测试，对水汽和氧气的阻隔透过率达到10-2-10- 3g/m2.day，可见光透光率>85%，蓝光透光率>87%。
实施例2：图1所示，本实施例提出了一种高透光性复合阻隔膜，其由下到上依次由PET制成的基材层1、氧化铝材质的氧化物层2和聚酯材质的胶水层3组成；PET的厚度为15μm，氧化物层2厚度35微米，胶水层3的厚度为2微米；经过测试，对水汽和氧气的阻隔透过率达到10-1-10-2g/m2.day，可见光透光率>90%，蓝光透光率>91%。
实施例3：图1所示，本发明提出了一种高透光性复合阻隔膜，其由下到上依次由PET制成的基材层1、氧化铝材质的氧化物层2和聚酯材质的胶水层3组成；PET的厚度为45μm，氧化物层2厚度35微米，胶水层3的厚度为8微米；经过测试，对水汽和氧气的阻隔透过率达到10-2-10-3g/m2.day，可见光透光率>80%，蓝光透光率>85%。
对比例1：一种现有的复合阻隔膜，由30μm厚度的尼龙薄膜和氧化铝层组成；经过测试，对水汽和氧气的阻隔透过率达到1g/m2.day，可见光透光率>80%，蓝光透光率>80%。
除此之外，实施例1-3相对比对比例1，氧化层的磨损程度大大降低，氧化层所带来的成本降低50%以上。
实施例4：图2所示，选取两个实施例1中的复合阻隔膜相对贴合在一起，形成双层组合结构；经过测试，经过测试，对水汽和氧气的阻隔透过率达到10-3-10-4g/m2.day，可见光透光率>81%，蓝光透光率>87%。
实施例5：图3所示，本实施例提出了一种高透光性复合阻隔膜的三层组合结构，每一层由下到上依次由聚氨酯材质的易接着层4、环氧树脂材质的胶水层3、PET制成的基材层1、氧化铝材质的氧化物层2和聚酯材质的胶水层3组成；PET的厚度为30μm，氧化物层2厚度35微米，两个胶水层3的厚度为5微米；经过测试，对水汽和氧气的阻隔透过率达到10-4-10- 6g/m2.day，可见光透光率>80%，蓝光透光率>83%。
实施例6：图4所示，本实施例提出了一种高透光性复合阻隔膜，自下而上依次由PET制成的基材层1、氧化铝材质的氧化物层2、聚酯材质的胶水层3以及硬化雾面层5组成；硬化雾面层5的硬度大于2HB；硬化雾面层5能够使透光更加均匀，相比现有的不含有硬化雾面层5的阻隔膜，透光性大大增加；经过测试，对水汽和氧气的阻隔透过率达到10-1-10-3g/m2.day，可见光透光率>90%，蓝光透光率>95%。
对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。
Claims (9)
1.一种高透光性复合阻隔膜，其特征在于，所述阻隔膜依次包括基材层、氧化物层以及胶水层。
2.根据权利要求1所述的高透光性复合阻隔膜，其特征在于，附着于胶水层的外表面上还设有一硬化雾面层，硬度大于等于2HB。
3.根据权利要求1所述的高透光性复合阻隔膜，其特征在于，附着于基材层的外表面亦设有一胶水层，附着于胶水层的外表面附着于一易接着层；所述易接着层材质选取为聚氨酯、聚丙烯酸酯或聚酯化合物的一种。
4.根据权利要求1、2或3任意所述的高透光性复合阻隔膜，其特征在于，所述基材层的材质为PET，厚度为6-50μm，透光率大于80%。
5.根据权利要求3所述的高透光性复合阻隔膜，其特征在于，所述胶水层通过紫外固化或高温固化设置于氧化物层外表面或基材层外表面。
6.根据权利要求5所述的高透光性复合阻隔膜，其特征在于，所述胶水层为聚酯、环氧树脂、丙烯酸树脂或有机硅类的一种。
7.根据权利要求5所述的高透光性复合阻隔膜，其特征在于，所述胶水层的厚度为0.1-100μm。
8.根据权利要求5所述的高透光性复合阻隔膜，其特征在于，所述胶水层的厚度为0.5-10μm。
9.根据权利要求1所述的高透光性复合阻隔膜，其特征在于，所述氧化物层的厚度为20-80nm。
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| CN106476388A (zh) * | 2015-08-21 | 2017-03-08 | 汉能新材料科技有限公司 | 一种高阻隔膜及复合膜 |
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