CN107142040A - 一种具有抗菌功能的膜及其制备方法 - Google Patents
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Abstract
本发明公开了一种具有抗菌功能的膜,包括抗菌树脂涂层(1)、彩色印刷油墨层(2)、基材层(3)、底涂树脂层(4)、胶粘层(5),所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层。本发明还公开了制备方法。本发明产品具有抗菌、装饰、防伪功能。
Description
技术领域
本发明涉及一种功能膜,特别涉及一种具有广谱性抗菌功能的功能性膜及其制备方法。
背景技术
由于传染病的传播通常经过细菌,病毒的接触传染,尤其近几年出现的新的变异病菌,而市场上功能膜有时就成了传播病菌病毒的载体,造成间接接触传播。
间接接触传播又称日常生活接触传播,是指易感者接触了被传染源的排泄物或分泌物污染的日常生活用品而造成的传播。被污染的手在间接接触传播中起着特别重要的作用。例如,接触被肠道传染病患者的手污染了的食品经口可传播痢疾、伤寒、霍乱、甲型肝炎;被污染的衣服、被褥、帽子可传播疥疮、癣等;儿童玩具、食具、文具可传播白喉、猩红热;洗脸用被污染的毛巾可传播沙眼、急性出血性结膜炎;便器可传播痢疾、滴虫病;动物的皮毛可传播炭疽、布鲁菌病等。
间接接触传播所引起的传染病,病例多呈散发、亦可形成家庭或同室内传播。为了减少间接接触传播,市场需要一种广谱抗菌效果膜,而广谱抗菌效果功能膜还属于市场空白。
发明内容
本发明的目的是克服现有技术的不足,本发明的目的之一是提供一种具有抗菌功能的膜,本发明的另一个目的是提供一种具有抗菌功能的膜的制备方法。
本发明的技术方案为:
一种具有抗菌功能的膜,包括抗菌树脂涂层1、彩色油墨层2、基材层3、底涂树脂层4、胶粘层5,所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层。
所述胶粘层为压敏胶、或热熔胶、或胶粘剂层。
所述的基材层是薄膜、或无纺布、或纸张、或金属薄板、或金属箔。
所述的无机离子交换体包括但不限于磷酸锆。
所述的底涂层由聚乙烯亚胺或乙烯-丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为0.02-0.08g/m2,固含量为0.6%~5.0%,底涂层干重0.07g/m2,其厚度在0.01~0.07μm,所述热熔胶为聚乙烯 PE、乙烯-醋酸乙烯酯(EVA)共聚物,乙烯-丙烯酸甲酯(EMA)共聚物,乙烯-丙烯酸(EAA)共聚物中的一种或几种混合物。
所述的一种具有抗菌功能的膜的制备方法,包括如下步骤:
步骤1、在基材层上涂布一层彩色油墨层;
步骤2、利用磷酸锆包裹的银微粒作为抗菌剂,与聚氨酯透明树脂均匀混合后配制适合涂布或印刷工艺的抗菌树脂溶液;
通过涂布和/或印刷工艺,在彩色油墨层表面均匀涂布一层抗菌树脂溶液,经过涂布机和印刷机烘干后,成为抗菌薄膜;
步骤3、在基材层另一面上涂布底涂层,底涂层由聚乙烯亚胺或乙烯-丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为 0.02-0.08g/m2,固含量为0.6%~5.0%,底涂层干重0.07g/m2,其厚度在0.01~0.07μm;
步骤4、后续复合工序。
优选的,所配制的抗菌树脂涂层组成与重量比为:磷酸锆包裹的银微粒与聚氨酯树脂,磷酸锆包裹的银微粒与聚氨酯树脂的重量比为1:99—5:95,优选为2:98;
优选的,所述的后续复合工序为挤出复合。
优选的,所述的一种具有抗菌功能的膜的制备方法,
步骤1、首先在基材的里层表面上,通过凹版印刷机印刷彩色油墨层的图案;基材优选为BOPP;
步骤2、印刷抗菌薄膜:
将基材层,安装在凹版印刷机放卷轴上,经过凹印网版将按比例配置好的抗菌树脂油墨满版印刷,在薄膜表面形成一层抗菌树脂层,所述树脂层厚度1-2μm;
步骤3、预涂膜的制作:
将步骤1和2得到的基材层装在挤复机的放卷轴上,在BOPP薄膜的里层上涂布底涂层,由聚乙烯亚胺水溶液经干燥制成,涂布干重是0.02-0.07g/m2,固含量为0.7%-5.6%;底涂层干重为0.07g/m2,厚度≤0.02微米;
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度10-20μm:将EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与BOPP薄膜复合在一起形成胶层,其剥离力大于0.7N/15mm,经分切修边后,其预涂膜的总厚度是30-200μm。
优选的,所述的一种具有抗菌功能的膜的制备方法,步骤为:
步骤1、印刷彩色油墨层:
将基材层安装在印刷机放卷轴上,经过凹印版印刷一层油墨层,所述彩色油墨层厚度为1-2μm;基材层优选为BOPET;
步骤2、涂布抗菌树脂涂层:
将步骤1得到的基材,安装在涂布机放卷轴上,经过涂布辊涂布一层抗菌油墨层,使薄膜形成一层具有抗菌功能的抗菌树脂涂层,所述涂布层厚度1-2μm;
步骤3、预涂膜的制作:
将基材层放在挤复机的放卷轴上,在基材层的里层上涂布底涂层,由聚乙烯亚胺水溶液经干燥制成,涂布干重是0.02-0.07g/m2,固含量为0.7%—5.6%;底涂层干重为0.07g/m2,厚度≤0.02微米;
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度10-20μm:将EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与基材层复合在一起形成胶层经分切修边后,其预涂膜的总厚度是30-200μm。
在上述制备方法中,所使用的BOPP和BOPET基材的厚度、及其所制成的预涂膜也可以按序增减厚度。
本发明的有益效果
1、将抗菌剂微粒配制成为抗菌树脂(油墨)和对应的抗菌膜印刷/ 涂布工艺,尤其是通过计算机软件设计制版和印刷透明或亚光及彩色图案,在上述基材表面印刷产生抗菌效果的薄膜及其复合工序预涂膜,是具有抗菌效果的功能性包装产品,因此本发明的产品具有抗菌、装饰、防伪功能。本发明属于对人体安全型的抗菌剂技术在包装装饰行业上的应用。
2、抗菌基材的复合工艺,除对应挤出复合要求抗菌树脂涂层耐高温;还可以采用干式复合或湿式复合,对应干式复合,要求抗菌树脂涂层耐摩擦;对应湿式复合工艺要求抗菌树脂涂层耐水。抗菌树脂涂层具有耐摩擦、耐水的优点,是一种综合多项技术工艺的安全型抗菌包装装饰产品。
3、本发明的产品可以采用BOPP、BOPET、BOPA、CPP、PE等薄膜或纸张、编织布等作为基材加工成为抗菌性包装装饰用预涂膜。
4、发明本产品需要将金属银微粒子与聚氨酯为代表的透明树脂配制成适合涂布技术工艺。将金属银的微粒均匀溶入透明树脂中,
金属银微粒的外面包裹磷酸锆,其直径在1μ-2m,将其放进乙醇等溶剂中搅拌均匀而成为抗菌母液。技术关键是,第一使用径向泵和轴向泵同步泵搅拌后,形成抗菌母液;第二使溶解顺序是微粒要少量连续的倒入溶剂中,一定不能反,否则形成悬浮液致报废;第三,抗菌溶液涂布时需要在调解到粘度13—24秒之间(察恩3#杯检测)。
5、含有金属银微粒的混合树脂的涂布成为外观均匀一致的效果,需要印刷和涂布制版工艺的对应,即需要将银微粒及其包裹树脂嵌入凹版的网穴之中、完整转移到承印基材上的对应工艺。是技术难点之二。
印刷机的网穴设计参数是网穴宽度20-30μm,网深30—60μm。本发明的含有金属银及其包裹微粒的直径远小于网穴的几何体积,通过金属银及其包裹微粒和透明树脂配置的涂布液,可以实现凹版印刷的功能,实现银微粒及其包裹树脂嵌入凹版的网穴之中,每个孔穴中会有多个包裹颗粒;通过凹版和刮刀和印刷规程,将完整转移到承印基材上的对应工艺的混合树脂
6、本发明的制备方法,体现了预涂膜与抗菌基材制作工序的有机链接,在数十微米级的高低不平的金属银微粒在基材表面印刷或涂布成为凸点,保证有均匀的亚光外观效果和有效的粘接效果与剥离强度。以及采用计算机软件设计制版和将抗菌树脂作为抗菌油墨,进行表面透明与亚光效果的图案印刷以及彩印。抗菌薄膜背层胶粘剂的处理方式,使用是多种特定工艺的涂胶与复合技术作为后加工工序,是依据抗菌薄膜应用的行业和场合而定,但均具有耐高温,表面保障不变色的优点。
7、抗菌树脂涂层是金属银和磷酸锆微粒及聚氨酯树脂。这是区别于其他抗菌制品的最大的一个优点,只要不食用即安全。因此,可应用于妇幼用品、文具、服饰、家具装饰、奢侈品包装等多种产品的覆膜与包装上,都可以放心的使用。
8、本发明所述的抗菌膜具有抗菌的广谱性,大肠杆菌、大肠杆菌 0157、金黄葡萄球菌、黑曲霉素菌、绿脓菌、枯草菌、念珠菌、芽枝霉菌、MRSA均有效。
附图说明:
图1.一种具有抗菌功能的膜断面结构示意图,
其中,1:抗菌树脂涂层,2:彩色油墨层,3:基材层,4:底涂树脂层,5:胶粘层。
具体实施方式
实施例1:
印刷抗菌层/BOPP15/水性底涂层0.02/EVA15)结构的具有抗菌效果包装与装饰用预涂膜产品,具体实施包括如下步骤:
步骤1、在15μm的BOPP基材层上印刷彩色油墨层,彩色油墨层厚度1μm;
步骤2、印刷抗菌薄膜:
将步骤1得到的双向拉伸聚丙烯(BOPP)薄膜的卷膜,安装在凹版印刷机放卷轴上,经过凹印网版将抗菌树脂油墨满版印刷。在薄膜表面形成一层抗菌树脂层,所述抗菌树脂层厚度1μm;抗菌树脂配比为磷酸锆包裹的银微粒与聚氨酯树脂的重量比为1:99。步骤3、普通BOPP15/EVA15热熔胶层结构预涂膜的制作:
将步骤3得到的BOPP薄膜装在挤复机的放卷轴上,在BOPP薄膜的里层(无抗菌树脂层的一面)上涂布底涂层。本实例所采用的水性底涂层,由聚乙烯亚胺水溶液经干燥制成。一般涂布干重是 0.02g/m2,固含量为0.7%%;底涂层干重为0.07g/m2,厚度≤0.02微米。
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度15μm:将熔融指数 MI=15g/10min(190℃,2.16kg),熔点85℃的EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与BOPP薄膜复合在一起形成胶层,其剥离力大于0.7N/15mm,经分切修边后,其预涂膜的总厚度是32μm。
实施例2:
印刷抗菌层/BOPET15/水性底涂层0.02/EVA15)结构的具有抗菌效果包装与装饰用预涂膜产品,具体实施包括如下步骤:
步骤1、印刷彩色油墨层:
将厚度15微米、幅宽1320mm透明的双向拉伸聚酯(BOPET)薄膜的卷膜,安装在印刷机放卷轴上,经过凹印版印刷具有一定图案的印刷油墨层。使薄膜形成具有一定图案的彩印薄膜。所述彩色油墨层厚度1.5μm;
步骤2、涂布抗菌涂层:
将印刷了彩色油墨层的双向拉伸聚酯(BOPET)薄膜的卷膜,安装在涂布机放卷轴上,经过涂布辊涂布一层抗菌树脂涂层。使薄膜形成一层具有抗菌功能的彩印薄膜。所述涂布层厚度1.5μm,磷酸锆包裹的银微粒与聚氨酯树脂的重量比为2:98”;
步骤3、普通BOPET15/EVA12热熔胶层结构预涂膜的制作:
将透明BOPET15薄膜装在挤复机的放卷轴上,在BOPET15薄膜的里层上涂布底涂层。本实例所采用的水性底涂层,由聚乙烯亚胺水溶液经干燥制成。一般涂布干重是0.05g/m2,固含量为2.6%;底涂层干重为0.07g/m2,厚度≤0.02微米;
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度11μm:将熔融指数 MI=15g/10min(190℃,2.16kg),熔点85℃的EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与BOPP薄膜复合在一起形成胶层,其剥离力大于0.7N/15mm,经分切修边后,其预涂膜的总厚度是30μm。
实施例3:
一种具有抗菌功能的膜,包括抗菌树脂涂层(1)、彩色油墨层 (2)、基材层(3)、底涂层(4)、胶粘层(5),所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液,磷酸锆包裹的银微粒与聚氨酯树脂的重量比为5:95;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层;除胶粘层外,各层材料与实施例1相同,其中基材层厚度为160μm,彩色油墨层2μm,抗菌树脂层2μm,底涂层0.07 μm,所述胶粘层为压敏胶,厚度为36μm,预涂膜总厚度为200μ m。
实施例4:
一种具有抗菌功能的膜,包括抗菌树脂涂层1、彩色油墨层 2、基材层3、底涂层4、胶粘层5,所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层;所述胶粘层为胶粘剂层;所述的无机离子交换体为磷酸锆;磷酸锆包裹的银微粒与聚氨酯树脂的重量比为3:97.所述的基材层是金属箔,所述的底涂层由聚乙烯亚胺或乙烯-丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为0.06g/m2,固含量为4.0%,底涂层干重0.07g/m2,其厚度在0.01~0.07μm。金属箔厚度为30μ m,彩色油墨层1.5μm,抗菌树脂层1.5μm,底涂层0.03μm,所述胶粘层为压敏胶,厚度为40μm,预涂膜总厚度为73μm。
实施例5:
一种具有抗菌功能的膜,包括抗菌树脂涂层(1)、彩色油墨层(2)、基材层(3)、底涂层(4)、胶粘层(5),所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液磷酸锆包裹的银微粒与聚氨酯树脂的重量比为4:96;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层;所述胶粘层为热熔胶;所述的无机离子交换体为磷酸锆;所述的基材层是金属箔,所述的底涂层由聚乙烯亚胺或乙烯- 丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为0.03g/m2,固含量为1.0%,底涂层干重0.07g/m2,,所述热熔胶为乙烯-醋酸乙烯酯共聚物。金属箔厚度为30μm,彩色油墨层1.5μm,抗菌树脂层1.5μm,底涂层0.01μm,所述胶粘层为压敏胶,厚度为10μm,预涂膜总厚度为43μm。
需要说明的是:在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互任意组合。上述实施例虽然对本发明作了比较详细的说明,但是这些说明只是对本发明说明性的,而不是对本发明的限制,任何不超出本发明实质精神内的发明创造,均属于本发明的保护范围内。
Claims (10)
1.一种具有抗菌功能的膜,其特征在于:包括抗菌树脂涂层(1)、彩色油墨层(2)、基材层(3)、底涂层(4)、胶粘层(5),所述的抗菌树脂涂层是通过负载了银微粒子的无机离子交换体与聚氨酯透明树脂均匀混合后配制成为涂布溶液;再通过涂布和/或印刷工艺在基材表面制造一层具有抗菌效果的涂层。
2.如权利要求1所述的一种具有抗菌功能的膜,其特征在于:所述胶粘层为压敏胶、或热熔胶、或胶粘剂层。
3.根据权利要求1所述的一种具有抗菌功能的膜,其特征在于:所述的基材层是薄膜、或无纺布、或纸张、或金属薄板、或金属箔。
4.根据权利要求1所述的一种具有抗菌功能的膜,其特征在于:所述的无机离子交换体包括但不限于磷酸锆。
5.根据权利要求2所述的一种具有抗菌功能的膜,其特征在于:所述的底涂层由聚乙烯亚胺或乙烯-丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为0.02-0.08g/m2,固含量为0.6%~5.0%,底涂层干重0.07g/m2,其厚度在0.01~0.07μm;所述热熔胶为聚乙烯PE、乙烯-醋酸乙烯酯共聚物,乙烯-丙烯酸甲酯共聚物,乙烯-丙烯酸共聚物中的一种或几种混合物。
6.根据权利要求1至5任一所述的一种具有抗菌功能的膜的制备方法,其特征在于:抗菌膜制作方法包括如下步骤:
步骤1、在基材层上涂布一层彩色油墨层;
步骤2、利用磷酸锆包裹的银微粒作为抗菌剂,与聚氨酯透明树脂均匀混合后配制适合涂布或印刷工艺的抗菌树脂溶液;
通过涂布和/或印刷工艺,在彩色油墨层表面均匀涂布一层抗菌树脂溶液,经过涂布机和印刷机烘干后,成为抗菌薄膜;
步骤3、在基材层另一面上涂布底涂层,底涂层由聚乙烯亚胺或乙烯-丙烯酸共聚物或高分子聚酯水溶液制成,涂布干重为0.02-0.08g/m2,固含量为0.6%~5.0%,底涂层干重0.07g/m2,其厚度在0.01~0.07μm;
步骤4、后续复合工序。
7.根据权利要求6所述的一种具有抗菌功能的膜的制备方法,其特征在于:
所配制的抗菌树脂涂层组成与重量比为:磷酸锆包裹的银微粒与聚氨酯树脂,磷酸锆包裹的银微粒与聚氨酯树脂的重量比为1:99—5:95。
8.根据权利要求6所述的一种具有抗菌功能的膜的制备方法,其特征在于:所述的后续复合工序为挤出复合。
9.根据权利要求1至5任一所述的一种具有抗菌功能的膜的制备方法,其特征在于:
步骤1、首先在基材层的里层表面上,通过凹版印刷机印刷彩色油墨层的图案;
步骤2、印刷抗菌薄膜:
将基材层,安装在凹版印刷机放卷轴上,经过凹印网版将按比例配制好的抗菌树脂油墨满版印刷,在薄膜表面形成一层抗菌树脂层,所述树脂层厚度1-2μm;
步骤3、预涂膜的制作:
将步骤1和2得到的基材层装在挤复机的放卷轴上,在BOPP薄膜的里层上涂布底涂层,由聚乙烯亚胺水溶液经干燥制成,涂布干重是0.02-0.07g/m2,固含量为0.7%-5.6%;底涂层干重为0.07g/m2,厚度≤0.02微米;
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度10-20μm:将EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与BOPP薄膜复合在一起形成胶层,其剥离力大于0.7N/15mm,经分切修边后,其预涂膜的总厚度是30-200μm。
10.根据权利要求6所述的一种具有抗菌功能的膜的制备方法,其特征在于:
步骤1、印刷彩色油墨层:
将基材层安装在印刷机放卷轴上,经过凹印版印刷一层油墨层,所述彩色油墨层厚度为1-2μm;
步骤2、涂布抗菌树脂涂层:
将步骤1得到的基材,安装在涂布机放卷轴上,经过涂布辊涂布一层抗菌油墨层,使薄膜形成一层具有抗菌功能的抗菌树脂涂层,所述涂布层厚度1-2μm;
步骤3、预涂膜的制作:
将基材层放在挤复机的放卷轴上,在基材层的里层上涂布底涂层,由聚乙烯亚胺水溶液经干燥制成,涂布干重是0.02-0.07g/m2,固含量为0.7%—5.6%;底涂层干重为0.07g/m2,厚度≤0.02微米;
步骤4、用挤出复合机预涂热熔胶树脂工艺:
用挤出复合机流延EVA热熔胶树脂,厚度10-20μm:将EVA热熔胶粒料经过干燥处理后投入挤出机,在215-230℃的熔融温度下挤出和流延于底涂层上,经冷却辊、挤压辊的作用,与基材层复合在一起形成胶层经分切修边后,其预涂膜的总厚度是30-200μm。
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