CN112793265A - 一种防伪热收缩膜及其制备方法 - Google Patents

一种防伪热收缩膜及其制备方法 Download PDF

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CN112793265A
CN112793265A CN202011593758.2A CN202011593758A CN112793265A CN 112793265 A CN112793265 A CN 112793265A CN 202011593758 A CN202011593758 A CN 202011593758A CN 112793265 A CN112793265 A CN 112793265A
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何晓明
张军孝
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Xinyi Lingjun Optoelectronics Science And Technology Co ltd
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Abstract

本发明提供了一种防伪热收缩膜及其制备方法，属于包装膜加工技术领域，包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为55‑85μm，所述防伪层的厚度为30‑45μm，所述胶粘层的厚度为5‑10μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。该种防伪热收缩膜采用热收缩膜为基体，表面设有防伪层，用于包装膜使用表面不会产生变形，而且防伪标识牢固，不易脱落或磨损；该种防伪热收缩膜的制备方法简单，适宜于工业大规模推广。

Description

一种防伪热收缩膜及其制备方法
技术领域
本发明属于包装膜加工技术领域，具体地，涉及一种防伪热收缩膜及其制备方法。
背景技术
包装膜主要由几种不同牌号的树脂混合挤出而成，具有抗穿刺、超强度高性能，对堆放在货物进行缠绕包装，使包装物更加稳固整洁，更具有超强防水作用，被广泛使用在出口、造纸、五金、塑料化工、食品医药行业等。防伪包装目前有两种方式，一种是直接把标贴在包装上，一种是与包装融合为一体，也就是防伪包装一体化。
现有技术中的防伪热收缩膜一般都是在热收缩膜包装在产品表面后，再在热收缩膜表面印上防伪标记，防伪标记多由印记或在热收缩膜上进行打标或粘贴方式加在热收缩膜表面，由于印记或粘贴方式不牢固，易掉落或磨损，而在热收缩膜上进行打标，由于热收缩膜不耐高温，因此在打标过程中易使热收缩膜变形或者所包装物品表面产品形变。
发明内容
针对现有技术存在的不足，本发明提供一种防伪热收缩膜及其制备方法，该种防伪热收缩膜采用热收缩膜为基体，表面设有防伪层，用于包装膜使用表面不会产生变形，而且防伪标识牢固，不易脱落或磨损；该种防伪热收缩膜的制备方法简单，适宜于工业大规模推广。
为了达到上述目的，本发明通过以下技术方案来实现：一种防伪热收缩膜，包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为55-85 μm，所述防伪层的厚度为30-45μm，所述胶粘层的厚度为5-10μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。采用热收缩膜为基体，柔韧性好，不易破损，透明度好，防潮防水；表面设有防伪层，用于包装膜使用表面不会产生变形，采用激光打标机生成防伪图形，图形样式丰富，而且防伪标识牢固，不易脱落或磨损。
进一步地，所述热收缩膜基体层由如下重量配比的组分组成：PVC树脂 80-95 份、丙烯酸树脂15-25 份、氯化聚乙烯树脂5-10份、稳定剂3-5份、增塑剂5-10份、助剂1-5份及溶剂45-65份。PVC树脂柔韧性好，易成型，无毒无污染，耐腐蚀；丙烯酸树脂耐水耐腐蚀性好，耐候性好，光泽好；氯化聚乙烯树脂抗冲击性能好，耐低温性好，阻燃性好，耐老化。
进一步地，所述稳定剂采用二甲基锡。透明度好，热稳定性好。
进一步地，所述增塑剂采用如下重量配比的组分组成：硬脂酸丁酯15-25份、邻苯二甲酸二辛酯35-55份及环氧大豆油15-25份。增强柔韧性，使其易于加工。
进一步地，所述助剂为抗静电剂，所述抗静电剂采用乙氧基化脂肪族烷基胺。具有抗静电作用。
进一步地，所述溶剂采用质量配比为1:0.5-1.5的二甲苯和丙酮的混合溶剂。
进一步地，所述胶黏剂采用聚氨酯胶。透明度好。
本发明还提供了一种防伪热收缩膜的制备方法，制备如上所述的一种防伪热收缩膜，包括如下加工步骤：
（1）称取质量配比的热收缩膜基体原料置于混料机内混合均匀，然后置于造粒机内进行造粒，将所得造粒置于吹膜成型机上吹塑成型得到厚膜，对厚膜进行风冷，紧接着采用沸水蒸汽进行加热，并采用横向吹筒对其吹胀为薄膜，采用夹磨辊去除膜内气泡，收卷后即可得到热收缩膜基体层；
（2）在PVC膜上采用激光打标机印上防伪图形，得到防伪层；
（3）在步骤（1）所得热收缩膜基体层表面均匀涂上一层胶黏剂，采用压合方式将步骤（2）所得防伪层与其进行压合，即可得到防伪热收缩膜。
进一步地，所述步骤（1）中造粒挤出温度为180-260 ℃，吹膜成型机的吹膜温度为105-115 ℃。
进一步地，所述步骤（3）中的压合温度为65-85 ℃。
有益效果：与现有技术相比，本发明具有以下优点：本发明提供的一种防伪热收缩膜及其制备方法，该种防伪热收缩膜采用热收缩膜为基体，表面设有防伪层，用于包装膜使用表面不会产生变形，而且防伪标识牢固，不易脱落或磨损；该种防伪热收缩膜的制备方法简单，适宜于工业大规模推广。
具体实施方式
下面结合以下具体实施例，进一步阐述本发明。
实施例1
一种防伪热收缩膜，包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为55 μm，所述防伪层的厚度为30μm，所述胶粘层的厚度为5μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。
其中，所述热收缩膜基体层由如下重量配比的组分组成：PVC树脂 80 份、丙烯酸树脂15 份、氯化聚乙烯树脂5份、稳定剂3份、增塑剂5份、助剂1份及溶剂45份，所述稳定剂采用二甲基锡，所述增塑剂采用如下重量配比的组分组成：硬脂酸丁酯15份、邻苯二甲酸二辛酯35份及环氧大豆油15份；所述助剂为抗静电剂，所述抗静电剂采用乙氧基化脂肪族烷基胺；所述溶剂采用质量配比为1:0.5的二甲苯和丙酮的混合溶剂；所述胶黏剂采用聚氨酯胶。
一种防伪热收缩膜的制备方法，制备如上所述的一种防伪热收缩膜，包括如下加工步骤：
（1）称取质量配比的热收缩膜基体原料置于混料机内混合均匀，然后置于造粒机内进行造粒，将所得造粒置于吹膜成型机上吹塑成型得到厚膜，所述造粒挤出温度为180-260 ℃，吹膜成型机的吹膜温度为105 ℃，对厚膜进行风冷，紧接着采用沸水蒸汽进行加热，并采用横向吹筒对其吹胀为薄膜，采用夹磨辊去除膜内气泡，收卷后即可得到热收缩膜基体层；
（2）在PVC膜上采用激光打标机印上防伪图形，得到防伪层；
（3）在步骤（1）所得热收缩膜基体层表面均匀涂上一层胶黏剂，采用压合方式将步骤（2）所得防伪层与其进行压合，所述压合温度为65 ℃，即可得到防伪热收缩膜。根据GB/T15267-64检测其透光率为91.2 %，根据BB/T 0024-2004检测其拉伸强度为49.2 MPa。
实施例2
一种防伪热收缩膜，包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为85 μm，所述防伪层的厚度为45μm，所述胶粘层的厚度为10μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。
其中，所述热收缩膜基体层由如下重量配比的组分组成：PVC树脂 95 份、丙烯酸树脂25 份、氯化聚乙烯树脂10份、稳定剂5份、增塑剂10份、助剂5份及溶剂65份，所述稳定剂采用二甲基锡，所述增塑剂采用如下重量配比的组分组成：硬脂酸丁酯25份、邻苯二甲酸二辛酯55份及环氧大豆油25份；所述助剂为抗静电剂，所述抗静电剂采用乙氧基化脂肪族烷基胺；所述溶剂采用质量配比为1: 1.5的二甲苯和丙酮的混合溶剂；所述胶黏剂采用聚氨酯胶。
一种防伪热收缩膜的制备方法，制备如上所述的一种防伪热收缩膜，包括如下加工步骤：
（1）称取质量配比的热收缩膜基体原料置于混料机内混合均匀，然后置于造粒机内进行造粒，将所得造粒置于吹膜成型机上吹塑成型得到厚膜，所述造粒挤出温度为180-260 ℃，吹膜成型机的吹膜温度为115 ℃，对厚膜进行风冷，紧接着采用沸水蒸汽进行加热，并采用横向吹筒对其吹胀为薄膜，采用夹磨辊去除膜内气泡，收卷后即可得到热收缩膜基体层；
（2）在PVC膜上采用激光打标机印上防伪图形，得到防伪层；
（3）在步骤（1）所得热收缩膜基体层表面均匀涂上一层胶黏剂，采用压合方式将步骤（2）所得防伪层与其进行压合，所述压合温度为85 ℃，即可得到防伪热收缩膜。根据GB/T15267-64检测其透光率为90.9 %，根据BB/T 0024-2004检测其拉伸强度为60.4 MPa。
实施例3
一种防伪热收缩膜，包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为70 μm，所述防伪层的厚度为37μm，所述胶粘层的厚度为7μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。
其中，所述热收缩膜基体层由如下重量配比的组分组成：PVC树脂 87 份、丙烯酸树脂20 份、氯化聚乙烯树脂7份、稳定剂4份、增塑剂7份、助剂3份及溶剂55份，所述稳定剂采用二甲基锡，所述增塑剂采用如下重量配比的组分组成：硬脂酸丁酯20份、邻苯二甲酸二辛酯45份及环氧大豆油20份；所述助剂为抗静电剂，所述抗静电剂采用乙氧基化脂肪族烷基胺；所述溶剂采用质量配比为1:1的二甲苯和丙酮的混合溶剂；所述胶黏剂采用聚氨酯胶。
一种防伪热收缩膜的制备方法，制备如上所述的一种防伪热收缩膜，包括如下加工步骤：
（1）称取质量配比的热收缩膜基体原料置于混料机内混合均匀，然后置于造粒机内进行造粒，将所得造粒置于吹膜成型机上吹塑成型得到厚膜，所述造粒挤出温度为180-260 ℃，吹膜成型机的吹膜温度为110 ℃，对厚膜进行风冷，紧接着采用沸水蒸汽进行加热，并采用横向吹筒对其吹胀为薄膜，采用夹磨辊去除膜内气泡，收卷后即可得到热收缩膜基体层；
（2）在PVC膜上采用激光打标机印上防伪图形，得到防伪层；
（3）在步骤（1）所得热收缩膜基体层表面均匀涂上一层胶黏剂，采用压合方式将步骤（2）所得防伪层与其进行压合，所述压合温度为75 ℃，即可得到防伪热收缩膜。根据GB/T15267-64检测其透光率为90.8 %，根据BB/T 0024-2004检测其拉伸强度为53.2 MPa。
由以上结果可知，采用该种制备方法所制得的防伪热收缩膜具有较好的拉伸强度和透明度，适宜于工业大规模推广使用。
以上所述仅是本发明的几个实施方式，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，还可以做出若干改进，这些改进也应视为本发明的保护范围。

Claims (10)

1.一种防伪热收缩膜，其特征在于：包括热收缩膜基体层，所述热收缩膜基体层表面设有防伪层，所述防伪层通过胶黏剂与热收缩膜基体层相连，所述热收缩膜基体层的厚度为55-85 μm，所述防伪层的厚度为30-45μm，所述胶粘层的厚度为5-10μm，所述防伪层由PVC膜组成，所述PVC膜上设有由激光打标机生产的防伪图形。
2.根据权利要求1所述的一种防伪热收缩膜，其特征在于：所述热收缩膜基体层由如下重量配比的组分组成：PVC树脂 80-95 份、丙烯酸树脂15-25 份、氯化聚乙烯树脂5-10份、稳定剂3-5份、增塑剂5-10份、助剂1-5份及溶剂45-65份。
3.根据权利要求2所述的一种防伪热收缩膜，其特征在于：所述稳定剂采用二甲基锡。
4.根据权利要求2所述的一种防伪热收缩膜，其特征在于：所述增塑剂采用如下重量配比的组分组成：硬脂酸丁酯15-25份、邻苯二甲酸二辛酯35-55份及环氧大豆油15-25份。
5.根据权利要求2所述的一种防伪热收缩膜，其特征在于：所述助剂为抗静电剂，所述抗静电剂采用乙氧基化脂肪族烷基胺。
6.根据权利要求2所述的一种防伪热收缩膜，其特征在于：所述溶剂采用质量配比为1:0.5-1.5的二甲苯和丙酮的混合溶剂。
7.根据权利要求1所述的一种防伪热收缩膜，其特征在于：所述胶黏剂采用聚氨酯胶。
8.一种防伪热收缩膜的制备方法，制备如权利要求2-6任一项所述的一种防伪热收缩膜，其特征在于：包括如下加工步骤：
（1）称取质量配比的热收缩膜基体原料置于混料机内混合均匀，然后置于造粒机内进行造粒，将所得造粒置于吹膜成型机上吹塑成型得到厚膜，对厚膜进行风冷，紧接着采用沸水蒸汽进行加热，并采用横向吹筒对其吹胀为薄膜，采用夹磨辊去除膜内气泡，收卷后即可得到热收缩膜基体层；
（2）在PVC膜上采用激光打标机印上防伪图形，得到防伪层；
（3）在步骤（1）所得热收缩膜基体层表面均匀涂上一层胶黏剂，采用压合方式将步骤（2）所得防伪层与其进行压合，即可得到防伪热收缩膜。
9.根据权利要求8所述的一种防伪热收缩膜的制备方法，其特征在于：所述步骤（1）中造粒挤出温度为180-260 ℃，吹膜成型机的吹膜温度为105-115 ℃。
10.根据权利要求8所述的一种防伪热收缩膜的制备方法，其特征在于：所述步骤（3）中的压合温度为65-85 ℃。
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