CN106947099A - 一种墨印刷品用高复合牢度的复合膜及其制备方法 - Google Patents
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Abstract
本发明提供了一种墨印刷品用高复合牢度的复合膜及其制备方法,复合膜包括三层结构,从上向下依次为附着力促进剂涂层、热熔性树脂层、基材层,所述的热熔性树脂层为通过挤出机熔融挤出在基材层表面的热熔性树脂粒子,所述的附着力促进剂涂层涂覆在热熔性树脂层表面。本发明提供的墨印刷品用高复合牢度的复合膜具有原有保护性同时粘着力进一步增强的复合膜及其制备方法,使其与硅油、蜡含量高的印刷品粘结牢度高。
Description
技术领域
本发明涉及复合薄膜技术领域,具体是一种墨印刷品用高复合牢度的复合膜及其制备方法。
背景技术
PET薄膜是一种用途广泛的功能薄膜,具有广阔的发展前景。是由PTA(精制对苯二甲酸)和EG(乙二醇)在加热和催化剂及稳定剂存在下缩聚而成。
1946年英国发表了第一个制备PET的专利,1949年英国ICI公式完成中试,但美国杜邦公司购买专利后,1953年建立了生产装置,在世界最先实现工业化生产。初期PET几乎都用于合成纤维(我国俗称涤纶、的确良)。80年代以来,PET作为工程塑料有突破性的发展,相继研制出成核剂和结晶促进剂,目前PET与PBT一起作为热塑性聚酯,成为五大工程塑料之一。
复合薄膜是20世纪80年代后期引入我国的,由于覆膜工艺不仅对印刷品提供保护作用,延长其使用寿命,同时可以提高印刷品的外观效果,复合薄膜已迅速在我国得到普及,广泛的应用于印刷、包装领域。
现代印刷行业的高速发展,印刷技术不断更新。针对印刷产品领域,由于很多印刷品的表面的油墨中含有硅油或蜡,硅油与蜡的无机物成分含量大,复合时不易与传统复合膜中的热熔胶层结合,粘着力差,复合后的印刷品与复合膜的剥离强度低,即复合膜与印刷品相分离的现象,因此需要设计新材料,采用表面处理方法,增强其与油墨的亲和性,从而增强粘着力和剥离强度。
发明内容
本发明为了解决现有技术的问题,提供了一种具有原有保护性同时粘着力进一步增强的复合膜及其制备方法,使其与硅油、蜡含量高的印刷品粘结牢度高。
本发明提供的墨印刷品用高复合牢度的复合膜包括三层结构,从上向下依次为附着力促进剂涂层、热熔性树脂层、基材层,所述的热熔性树脂层为通过挤出机熔融挤出在基材层表面的热熔性树脂粒子,所述的附着力促进剂涂层涂覆在热熔性树脂层表面。
进一步改进,所述的基材层为厚度10-50um的聚对苯二甲酸乙二醇酯。
进一步改进,所述的热熔性树脂为厚度10-50um的乙烯-醋酸乙烯共聚物树脂。
进一步改进,所述的附着力促进剂涂层由附着力促进剂经甲醇稀释100倍得到。
本发明还提供了一种墨印刷品用高复合牢度的复合膜的制备方法,包括以下步骤:
1)基材层放卷,将PET基材安放于放卷机上通过气胀轴放卷,将其展开;
2)对PET基材的复合面进行表面处理;
3)涂布热熔胶层,挤出复合生产线的挤出机挤出乙烯-醋酸乙烯(EVA)热熔胶,同时生产线的导辊将聚对苯二甲酸乙二醇酯(PET)薄膜输送至复合工位,并与流延至复合工位的热熔胶通过挤压结合,形成复合膜,再经过冷却辊冷却处理;
4)涂布附着力促进剂涂层,将附着力促进剂经甲醇稀释100倍得到稀释液,然后将稀释液均匀涂覆于热熔胶层表面,再通过烘干处理得到涂布附着力促进剂涂层。
5)收卷成型,通过收卷机收成卷材。
本发明有益效果在于:
与现有技术相比,本发明通过在热熔胶层一侧复合附着力促进剂涂层,可以和印刷品有很好的粘结力,实现与纸张牢固结合,在质量方面本产品选取了综合性能优异的PET薄膜,并且通过电晕和AC剂底涂处理,提高表面性能,使粘结力更好。此外,附着力促进剂涂层采用涂布方式,加工工艺简单,成本低。
附图说明
图1为本发明提供的墨印刷品用高复合牢度的复合膜结构示意图。
具体实施方式
下面结合附图对本发明作进一步说明。
本发明提供的墨印刷品用高复合牢度的复合膜结构如图1所示,包括三层结构,从上向下依次为附着力促进剂涂层1、热熔性树脂层2、基材层3,所述的热熔性树脂层2为通过挤出机熔融挤出在基材层3表面的热熔性树脂粒子,所述的附着力促进剂涂层1涂覆在热熔性树脂层2表面。
进一步改进,所述的基材层为厚度10-50um的聚对苯二甲酸乙二醇酯。
进一步改进,所述的热熔性树脂为厚度10-50um的乙烯-醋酸乙烯共聚物树脂。
进一步改进,所述的附着力促进剂涂层由附着力促进剂经甲醇稀释100倍得到。
本发明还提供了一种墨印刷品用高复合牢度的复合膜的制备方法,包括以下步骤:
1)基材层放卷,将PET基材安放于放卷机上通过气胀轴放卷,将其展开;
2)对PET基材的复合面进行表面处理;
3)涂布热熔胶层,挤出复合生产线的挤出机挤出乙烯-醋酸乙烯(EVA)热熔胶,同时生产线的导辊将聚对苯二甲酸乙二醇酯(PET)薄膜输送至复合工位,并与流延至复合工位的热熔胶通过挤压结合,形成复合膜,再经过冷却辊冷却处理;
4)涂布附着力促进剂涂层,将附着力促进剂经甲醇稀释100倍得到稀释液,然后将稀释液均匀涂覆于热熔胶层表面,再通过烘干处理得到涂布附着力促进剂涂层。
5)收卷成型,通过收卷机收成卷材。
本发明具体应用途径很多,以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进,这些改进也应视为本发明的保护范围。
Claims (6)
1.一种墨印刷品用高复合牢度的复合膜,其特征在于:包括三层结构,从上向下依次为附着力促进剂涂层(1)、热熔性树脂层(2)、基材层(3),所述的热熔性树脂层(2)为通过挤出机熔融挤出在基材层(3)表面的热熔性树脂粒子,所述的附着力促进剂涂层(1)涂覆在热熔性树脂层(2)表面。
2.根据权利要求1所述的墨印刷品用高复合牢度的复合膜,其特征在于:所述的基材层为厚度10-50um的聚对苯二甲酸乙二醇酯。
3.根据权利要求1所述的墨印刷品用高复合牢度的复合膜,其特征在于:所述的热熔性树脂为厚度10-50um的乙烯-醋酸乙烯共聚物树脂。
4.根据权利要求1所述的墨印刷品用高复合牢度的复合膜,其特征在于:所述的附着力促进剂涂层由附着力促进剂经甲醇稀释100倍得到。
5.一种墨印刷品用高复合牢度的复合膜的制备方法,其特征在于包括以下步骤:
1)基材层放卷,将PET基材安放于放卷机上通过气胀轴放卷,将其展开;
2)对PET基材的复合面进行表面处理;
3)涂布热熔胶层,挤出复合生产线的挤出机挤出乙烯-醋酸乙烯热熔胶,同时生产线的导辊将聚对苯二甲酸乙二醇酯薄膜输送至复合工位,并与流延至复合工位的热熔胶通过挤压结合,形成复合膜,再经过冷却辊冷却处理;
4)涂布附着力促进剂涂层,将附着力促进剂经甲醇稀释100倍得到稀释液,然后将稀释液均匀涂覆于热熔胶层表面,再通过烘干处理得到涂布附着力促进剂涂层;
5)收卷成型,通过收卷机收成卷材。
6.根据权利要求5所述的墨印刷品用高复合牢度的复合膜的制备方法,其特征在于:步骤2)所述的PET基材表面预处理过程包括电晕和AC剂底涂。
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