CN111515107A - 一种具有超高透明阻隔的氧化物薄膜及其制备方法 - Google Patents

一种具有超高透明阻隔的氧化物薄膜及其制备方法 Download PDF

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CN111515107A
CN111515107A CN202010321123.0A CN202010321123A CN111515107A CN 111515107 A CN111515107 A CN 111515107A CN 202010321123 A CN202010321123 A CN 202010321123A CN 111515107 A CN111515107 A CN 111515107A
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梁海
刘燕
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Jiangsu Bairuier Packaging Materials Co ltd
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Abstract

本发明提供一种具有超高透明阻隔的氧化物薄膜及其制备方法，括基材、镀膜层以及自粘性PVA保护涂层，所述基材为PET塑料薄层，所述镀膜层为氧化铝层或氧化硅层，所述自粘性PVA通过涂布工艺涂布于镀膜层，所述基材层厚度为6‑15μm，所述镀膜层厚度为8‑10μm，所述自粘性PVA保护涂层克重为1‑2％，所述PVA保护涂料固含量为6‑15％。本发明优势在于：1、将自粘性的PVA涂层涂覆在镀层上，解决了镀层在基材上粘附力不足的缺点，提高其产品各方面的性能；2、对基材镀层进行深入研究，提供了氧化铝镀膜和氧化硅镀膜的方法；3、制得的薄膜具有较高的透明性和高阻隔性，能够更好的应用在食品包装领域方面。

Description

一种具有超高透明阻隔的氧化物薄膜及其制备方法
技术领域
本发明属于新型高分子材料领域，特别涉及一种具有超高透明阻隔的氧化物薄膜及其制备方法。
背景技术
随着经济社会的发展和生活水平的改善，人们越来越注意食品卫生和食品安全，食品包装作为食品质量安全的重要组成部分，也逐渐收到人们的重视。
多年来，塑料薄膜以其优异的性能和良好的加工型快速占领了包装市场。然而作为食品包装用途，其需要具备透明性、阻氧、阻湿以及耐高温等相关特性。一般情况下，单独塑料薄膜层由于材质的限制，无法符合食品包装的要求，因此需要对单层薄膜进行镀层。现阶段主要手段是在塑料PET表面上进行镀膜，形成复合的包装材料，然而不透明、镀层强度差也限制了其应用范围。
发明内容
本发明要解决的技术问题是克服现有的技术缺陷，提供一种具有超高透明阻隔的氧化物薄膜及其制备方法，通过在PET薄膜上进行镀层氧化铝或氧化硅，然后在经过保护涂层PVA，最终达到具有超高阻隔氧化物薄膜。
为解决上述技术问题，本发明提供如下的技术方案：
一种具有超高透明阻隔的氧化物薄膜及其制备方法，基材、镀膜层以及自粘性PVA保护涂层，其特征在于，所述基材为PET塑料薄层，所述镀膜层为氧化铝层或氧化硅层，所述自粘性PVA通过涂布工艺涂布于镀膜层。
优选的，所述基材厚度为6-15μm，所述镀膜层厚度为8-10μm，所述自粘性PVA保护涂层克重为1-2％，所述PVA保护涂料固含量为6-15％。
优选的，所述超高阻隔氧化物薄膜包括以下步骤：
(1)自粘PVA保护涂层的制备方法如下：将质量分数为18-20％的聚乙烯醇的水溶液混合加热搅拌一定时间后，降温到40℃后，然后按顺序依次滴加聚醚多元醇类消泡剂、十二烷基苯磺酸钠、柠檬酸、加密花三聚氰胺树脂以及聚乙烯亚胺，滴加后加热至搅拌，得到自粘性PVA涂料。
(2)所述氧化铝镀膜层制备方法如下：在真空度为4×10-4mba条件下，将纯度为99.9％的铝丝连续送至温度为1500℃的蒸发舟上，同时通入高纯氧进行氧化形成氧化铝层，从而在移动的基材薄膜表面形成铝氧化镀膜层；
(3)所述氧化硅镀膜层制备方法如下：将基材放入酸性溶液中进行表面修饰，并迅速进入浸渍到配置好一定浓度的水玻璃溶液中，浸渍一段时间后取出，干燥后，重复浸渍、干燥，形成氧化硅镀膜层。
将镀膜层完成薄膜送上涂布设备将制得的自粘型PVA涂料均匀涂覆在薄膜表面，并恒温干燥，最后对涂布完成的薄膜进行烘干收卷。
进一步优选的，步骤(1)中，所述起始搅拌温度为80-90℃，所述搅拌速度为200-300rpm/min，搅拌时间30-40min，所述后续反应温度为80℃，反应时间为3h，所述聚乙烯醇溶液、聚醚多元醇、十二烷基苯环酸钠、柠檬酸、甲醚化三聚氰胺树脂以及聚乙烯二胺，各组分质量比为100：(0.05-0.1)：(0.2-0.25)：(0.07-0.1)：(1.2-1.5)：(3-4.5)。
步骤(2)中，所述水玻璃溶液浓度为40％，模数为3.3，所述酸性溶液为HCl/KMnO4混合液，所述浸渍温度为室温条件，浸渍时间为1-2h，所述干燥温度为60-70℃，所述浸渍次数为2-3次。
有益效果
(1)本发明将自粘性的PVA涂层涂覆在镀层上，解决了镀层在基材上粘附力不足的缺点，提高其产品各方面的性能；
(2)本发明对基材镀层进行深入研究，不仅提供了氧化铝镀膜的方法，还提供了氧化硅镀膜的方法，使得基材在镀膜方面具有更多的可选择性。
(3)本发明制得的薄膜具有较高的透明性和高阻隔性，能够更好的应用在食品包装领域方面。
具体实施例
以下结合具体实施事例对本发明进行进一步的详细描述。
一种具有超高透明阻隔的氧化物薄膜及其制备方法，包括基材、镀膜层以及自粘性PVA保护涂层，基材为PET塑料薄层，镀膜层为氧化铝层或氧化硅层，自粘性PVA通过涂布工艺涂布于镀膜层。
基材厚度为6-15μm，镀膜层厚度为8-10μm，自粘性PVA保护涂层克重为1-2％，所PVA保护涂料固含量为6-15％。
一种具有超高透明阻隔的氧化物薄膜及其制备方法如下：
(1)自粘PVA保护涂层的制备：将质量分数为18-20％的聚乙烯醇的水溶液混合加热搅拌一定时间后，降温到40℃后，然后按顺序依次滴加聚醚多元醇类消泡剂、十二烷基苯磺酸钠、柠檬酸、加密花三聚氰胺树脂以及聚乙烯亚胺，滴加后加热至搅拌，得到自粘性PVA涂料。
(2)氧化铝镀膜层制备方法如下：在真空度为4×10-4mba条件下，将纯度为99.9％的铝丝连续送至温度为1500℃的蒸发舟上，同时通入高纯氧进行氧化形成氧化铝层，从而在移动的基材薄膜表面形成铝氧化镀膜层；
(3)氧化硅镀膜层制备方法如下：将基材放入酸性溶液中进行表面修饰，并迅速进入浸渍到配置好一定浓度的水玻璃溶液中，浸渍一段时间后取出，干燥后，重复浸渍、干燥，形成氧化硅镀膜层。
(4)将镀膜层完成薄膜送上涂布设备将制得的自粘型PVA涂料均匀涂覆在镀膜后的薄膜表面，并恒温干燥，最后对涂布完成的薄膜进行烘干收卷。
本发明制得的透明高阻隔氧化铝薄膜以及透明高阻隔氧化硅薄膜，其性能如下所示：
Figure BDA0002461453110000041
综上所述，本发明提供的透明高阻隔氧化物薄膜在透湿性和透氧性在包装领域的适用性范围更广。
上述事实例仅为优选实施例而已，并不用于限制本发明，尽管参照前述事实例对本发明进行详细的说明，对于本领域的技术人员来说，其依然可以对前述实施例所记载的技术方案进行修改，或者对其部分技术特征进行同等替换。凡在本发明的精神和原则至内，所做的任何修改、同等替换、改进等，均应包含在本发明的保护范围之内。

Claims (5)

1.一种具有超高透明阻隔的氧化物薄膜及其制备方法，包括基材、镀膜层以及自粘性PVA保护涂层，其特征在于，所述基材为PET塑料薄层，所述镀膜层为氧化铝层或氧化硅层，所述自粘性PVA通过涂布工艺涂布于镀膜层。
2.根据权利要求1所述的一种具有超高透明阻隔的氧化物薄膜及其制备方法，其特征在于，所述基材厚度为6-15μm，所述镀膜层厚度为8-10μm，所述自粘性PVA保护涂层克重为1-2％，所述PVA保护涂料固含量为6-15％。
3.根据权利要求1所述的一种具有超高透明阻隔的氧化物薄膜及其制备方法，其特征在于，包括以下步骤：
(1)自粘PVA保护涂层的制备方法如下：将质量分数为18-20％的聚乙烯醇的水溶液混合加热搅拌一定时间后，降温到40℃后，然后按顺序依次滴加聚醚多元醇类消泡剂、十二烷基苯磺酸钠、柠檬酸、加密花三聚氰胺树脂以及聚乙烯亚胺，滴加后加热至搅拌，得到自粘性PVA涂料。
(2)所述氧化铝镀膜层制备方法如下：在真空度为4×10-4mba条件下，将纯度为99.9％的铝丝连续送至温度为1500℃的蒸发舟上，同时通入高纯氧进行氧化形成氧化铝层，从而在移动的基材薄膜表面形成铝氧化镀膜层；
(3)所述氧化硅镀膜层制备方法如下：将基材放入酸性溶液中进行表面修饰，并迅速进入浸渍到配置好一定浓度的水玻璃溶液中，浸渍一段时间后取出，干燥后，重复浸渍、干燥，形成氧化硅镀膜层。
(4)将镀膜层完成薄膜送上涂布设备将制得的自粘型PVA涂料均匀涂覆在镀膜后的薄膜表面，并恒温干燥，最后对涂布完成的薄膜进行烘干收卷。
4.根据权利要求3所述的一种具有超高透明阻隔的氧化物薄膜及其制备方法，其特征在于，其步骤(1)中，所述起始搅拌温度为80-90℃，所述搅拌速度为200-300rpm/min，搅拌时间30-40min，所述后续反应温度为80℃，反应时间为3h，所述聚乙烯醇溶液、聚醚多元醇、十二烷基苯环酸钠、柠檬酸、甲醚化三聚氰胺树脂以及聚乙烯二胺，各组分质量比为100∶(0.05-0.1)∶(0.2-0.25)∶(0.07-0.1)∶(1.2-1.5)∶(3-4.5)。
5.根据权利要求3所述的一种具有超高透明阻隔的氧化物薄膜及其制备方法，其特征在于，其步骤(2)中，所述水玻璃溶液浓度为40％，模数为3.3，所述酸性溶液为HCl/KMnO4混合液，所述浸渍温度为室温条件，浸渍时间为1-2h，所述干燥温度为60-70℃，所述浸渍次数为2-3次。
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