CN106883440A - 一种哑面抗划伤功能预涂膜及其制备方法 - Google Patents

一种哑面抗划伤功能预涂膜及其制备方法 Download PDF

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CN106883440A
CN106883440A CN201710177783.4A CN201710177783A CN106883440A CN 106883440 A CN106883440 A CN 106883440A CN 201710177783 A CN201710177783 A CN 201710177783A CN 106883440 A CN106883440 A CN 106883440A
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coating film
scratch resistance
coating
film
mute face
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张震鲁
张涛
赵斌
武俊
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BEIJING KANGDEXIN FUNCTION MATERIAL Co Ltd
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Abstract

本发明公开了一种哑面抗划伤功能预涂膜，包括哑面抗划伤功能涂层和薄膜基预涂膜。所述哑面抗划伤层的表面光泽度范围为0.5‑10°。本发明还公开制备方法。本发明的预涂膜的表面具有超低哑度，给人以舒适的视觉享受，同时该功能预涂膜具有较好的抗划伤、耐磨性能，降低了运输过程带来的对包装外观磨损的风险，满足后续加工工序的要求，并且扩展了预涂膜的使用范围。

Description

一种哑面抗划伤功能预涂膜及其制备方法
技术领域
本发明涉及功能预涂膜技术领域，特别是一种哑面抗划伤功能预涂膜及制备工艺。
背景技术
目前市场上所用包装预涂膜多为哑光、亮光、及具有印刷彩色图案的包装用薄膜，特别是哑光的预涂膜，覆在包装材料上能给人一种朴实的厚重感，色彩丰富却不张扬，非常受消费者喜爱。但是使用常规哑光预涂膜包覆的包装材料在运输和正常使用过程中常常因为与机械接触，在外力作用下产生划伤或划痕，影响包装材料的外观。由此也对包装预涂膜的光泽度和抵抗外界冲击的能力提出了性能要求。
包装行业内也有相关的抗划伤功能预涂膜，为了达到消光效果，通常是采用添加微米级的有机或无机颗粒的方法，在涂层表面形成高低起伏的纹路以达到消光目的，由于消光微粒与树脂存在界面相容问题，同时消光微粒具有较高的比重和触变性，在树脂体系中很难均匀分散，同时导致树脂体系具有较高的粘度，为了改善涂料的涂布适性，往往加入有机溶剂用来调整粘度，其结果会导致涂布工艺较难控制和VOC排放超标等环保问题。
发明内容
本发明的目的是为改进常规预涂膜的抗划伤性能，以及降低常规预涂膜的光泽度。
为实现上述目的，本发明的下技术方案为：
一种哑光抗划伤功能预涂膜，：包括哑面抗划伤功能涂层和薄膜基预涂膜。
所述哑面抗划伤层的表面光泽度范围为0.5-10°。
所述预涂膜表面的耐刮性能测试值≥0.1N。
所述的哑面抗划伤涂层为UV清漆，所述的UV清漆涂布厚度为3-5μm。
所述的UV清漆优选为丙烯酸酯化合物、或甲基丙烯酸酯化合物，或乙烯基化合物。
薄膜基预涂膜由薄膜、底涂层和热熔胶层组成。
所述的哑面抗划伤功能预涂膜，所述薄膜的材料为BOPP、或BOPET、或NY薄膜，厚度为12-100μm；所述底涂层的材料为聚乙烯亚胺(PEI)水溶性聚合物，厚度为0.01-0.03μm；所述热熔胶为乙烯醋酸乙烯共聚物(EVA)，其厚度范围为8-150μm
所述的哑面抗划伤功能预涂膜的制备方法，步骤为：
(1)将可UV固化的纳米UV清漆以柔版涂布于双向拉伸制成的20.01-250.03μm的BOPP薄膜上，涂布重量控制在3-5g/m2范围之间；
(2)经过涂覆的BOPP薄膜以50m/min的速度通过氙气激发态辐射体的辐射室，该辐射室用氮气吹扫；然后经过UV固化装置，在氮气氛围下固化。
所述的哑面抗划伤功能预涂膜的制备方法，氙气激发态辐射体进行辐照的时间为0.01-200s；氧气浓度为≤1000ppm。
优选的，氙气激发态辐射体进行辐照的辐照时间为0.05-50s；优选氧气浓度≤200ppm。
所述辐射体的能量范围为6.8-7.6ev；所述辐射体与预涂膜功能涂层表面的距离为1-8cm，优选1-3cm。
本发明的有益效果：
在172nm激发态辐射体进行前辐照，不仅造成表面具有超低哑度，同时可以改善涂层表面的可印刷性、可烫金性和可润湿性等后加工性能。
通过选择极性较强的单体和丙烯酸酯低聚物或甲基丙烯酸酯低聚物来实现固化后聚丙烯酸酯和聚甲基丙烯酸酯表面具有较高的表面能是有限的，同样通过助剂提高表面能的方法也是不适用的。通过电晕处理不适用于实现聚丙烯酸酯、聚甲基丙烯酸酯表面能的有效和长期性的提高。而本发明是通过在自由基的链增长过程中键合聚合物或聚合物片段上的极性基团，从而形成较高的表面能，同时可防止极性基团的迁移。
现有技术中在含有有机溶剂的UV树脂体系中，通过添加微米级的有机或无机颗粒，因为有机溶剂的挥发作用，促进表面的不平整性，同样也很难实现光泽度降低至0.5-10°的范围之内，一般光泽度在10°而本发明，能够低至0.5°。
本发明产品所用涂料采用100％固含UV树脂，经过两步固化，第一步为表面固化，形成表面纹路，第二步为深层固化，从而实现UV涂层的完全固化。其产品具有技术先进，适用广泛，制作成本能低等工艺优势，在功能预涂膜产品中具有较强的市场竞争优势。
本发明所述的预涂膜可适用于高档书籍、化妆品、电子产品等广泛用途。由此，通过制备超低哑度抗划伤功能预涂膜，由于预涂膜的表面具有超低哑度，给人以舒适的视觉享受，同时该功能预涂膜具有较好的抗划伤、耐磨性能，降低了运输过程带来的对包装外观磨损的风险，满足后续加工工序的要求，并且扩展了预涂膜的使用范围。
附图说明
图1一种制备哑面抗划伤功能预涂膜断面结构示意图；
图中：1.哑面抗划伤层，2.聚丙烯薄膜层，3.底涂层，4.热熔胶层
具体实施方式
以下所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。
实施例1：
将可UV固化的纳米复合丙烯酸酯以柔版涂布与双向拉伸制成的20.01μm聚丙烯(BOPP)薄膜上，涂布重量控制在3-5g/m2范围之间。经过涂覆的BOPP薄膜以50m/min的速度通过氙气激发态辐射体的辐射室，能量范围为6.8-7.6ev的172nm辐射体辐照，该辐射室用氮气吹扫，然后经过UV固化装置，同样是在氮气氛围下固化。
对比例1：
将可UV固化的纳米复合丙烯酸酯以柔版涂布方式涂覆在双向拉伸制成的20.01μm聚丙烯(BOPP)薄膜上，涂布重量控制在3-5g/m2范围之间。经过涂覆的BOPP薄膜以50m/min的速度经过UV固化装置，同样是在氮气氛围下固化。
表1为实施例1-2功能预涂膜的相关性能指标。
由表1可以得出，涂覆有纳米复合丙烯酸酯的BOPP预涂膜经过172nm辐射体辐照后，预涂膜表面光泽度明显降低，同时预涂膜表面的抗划伤性能有所提高。
实施例2：
一种哑面抗划伤功能预涂膜，包括哑面抗划伤功能涂层和薄膜基预涂膜所述哑面抗划伤层的表面光泽度范围为0.5-10°。所述预涂膜表面的耐刮性能测试值≥0.1N。所述的哑面抗划伤涂层为UV清漆所述的UV清漆涂布厚度为3-5μm。所述的UV清漆为丙烯酸酯化合物,薄膜基预涂膜由薄膜、底涂层和热熔胶层组成。
实施例3：
一种哑面抗划伤功能预涂膜，包括哑面抗划伤功能涂层和薄膜基预涂膜所述哑面抗划伤层的表面光泽度范围为0.5-10°。所述预涂膜表面的耐刮性能测试值≥0.1N。所述的哑面抗划伤涂层为UV清漆所述的UV清漆涂布厚度为3-5μm。所述的UV清漆为丙烯酸酯化合物,薄膜基预涂膜由薄膜、底涂层和热熔胶层组成,所述薄膜的材料为BOPP薄膜，厚度为12-100μm；所述底涂层的材料为聚乙烯亚胺水溶性聚合物，厚度为0.01-0.03μm；所述热熔胶为乙烯醋酸乙烯共聚物，其厚度范围为8-150μm。
实施例4：
一种哑面抗划伤功能预涂膜的制备方法，步骤为：
(1)将可UV固化的纳米UV清漆以柔版涂布于双向拉伸制成的20.01-250.03μm的BOPP薄膜上，涂布重量控制在3-5g/m2范围之间；
(2)经过涂覆的BOPP薄膜以50m/min的速度通过氙气激发态辐射体的辐射室，该辐射室用氮气吹扫；然后经过UV固化装置，在氮气氛围下固化，
氙气激发态辐射体进行辐照的辐照时间为0.01-200s；氧气浓度为≤1000ppm。
实施例5：
一种哑面抗划伤功能预涂膜的制备方法，步骤为：
(1)将可UV固化的纳米UV清漆以柔版涂布于双向拉伸制成的20.01-250.03μm的BOPP薄膜上，涂布重量控制在3-5g/m2范围之间；
(2)经过涂覆的BOPP薄膜以50m/min的速度通过氙气激发态辐射体的辐射室，该辐射室用氮气吹扫；然后经过UV固化装置，在氮气氛围下固化，氙气激发态辐射体进行辐照的辐照时间为0.05-50s；氧气浓度≤200ppm；所述辐射体的能量范围为6.8-7.6ev；所述辐射体与预涂膜功能涂层表面的距离为1-8cm。
虽然，上文中已经用一般性说明及具体实施方案对本发明做了详尽的描述，但在本发明的基础上，可以对之作一些修改或改进，这对本领域技术人员是显而易见的。因此，在不偏离本发明精神的基础上所做的这些修改或改进，均属于本发明要求保护的范围。

Claims (10)

1.一种哑面抗划伤功能预涂膜，其特征在于：包括哑面抗划伤功能涂层和薄膜基预涂膜。
2.如权利要求1所述的哑面抗划伤功能预涂膜，其特征在于：所述哑面抗划伤层的表面光泽度范围为0.5-10°。
3.如权利要求1所述的哑面抗划伤功能预涂膜，其特征在于：所述预涂膜表面的耐刮性能测试值≥0.1N。
4.如权利要求1所述的哑面抗划伤功能预涂膜，其特征在于：所述的哑面抗划伤涂层为UV清漆所述的UV清漆涂布厚度为3-5μm。
5.如权利要求1所述的哑面抗划伤功能预涂膜，其特征在于：
所述的UV清漆为丙烯酸酯化合物、或甲基丙烯酸酯化合物，
或乙烯基化合物。
6.如权利要求1所述的哑面抗划伤功能预涂膜，其特征在于：
薄膜基预涂膜由薄膜、底涂层和热熔胶层组成。
7.如权利要求6所述的哑面抗划伤功能预涂膜，其特征在于：
所述薄膜的材料为BOPP、或BOPET、或NY薄膜，厚度为12-100μm；所述底涂层的材料为聚乙烯亚胺水溶性聚合物，厚度为0.01-0.03μm；所述热熔胶为乙烯醋酸乙烯共聚物，其厚度范围为8-150μm。
8.如权利要求1至4任一所述的哑面抗划伤功能预涂膜的制备方法，其特征在于：步骤为：
(1)将可UV固化的纳米UV清漆以柔版涂布于双向拉伸制成的20.01-250.03μm的BOPP薄膜上，涂布重量控制在3-5g/m2范围之间；
(2)经过涂覆的BOPP薄膜以50m/min的速度通过氙气激发态辐射体的辐射室，该辐射室用氮气吹扫；然后经过UV固化装置，在氮气氛围下固化。
9.如权利要求8所述的哑面抗划伤功能预涂膜的制备方法，其特征在于：氙气激发态辐射体进行辐照的辐照时间为0.01-200s；氧气浓度为≤1000ppm。
10.如权利要求9所述的哑面抗划伤功能预涂膜的制备方法，其特征在于：氙气激发态辐射体进行辐照的辐照时间为0.05-50s；优选氧气浓度≤200ppm；所述辐射体的能量范围为6.8-7.6ev；所述辐射体与预涂膜功能涂层表面的距离为1-8cm。
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