CN111703164A - 一种哑光型金属化标签用bopp热封薄膜及其制备方法 - Google Patents
一种哑光型金属化标签用bopp热封薄膜及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂2‑3份、马来酸酐接枝改性物2‑3份、热封料94‑96份;所述芯层的原料按重量份包括:抗静电剂0‑2份,均聚聚丙烯98‑100份;所述消光层1和消光层2均为BOPP用消光料,BOPP用消光料的原料按重量包括:40‑50份聚丙烯、40‑50份高密度聚乙烯、0‑1份含氟高聚物和0‑2份抗氧剂。本发明还公开上述哑光型金属化标签用BOPP热封薄膜的制备方法。本发明不仅拥有良好的机械物理性能,同时具有高镀铝牢度、优异的消光均匀性和细腻性。
Description
技术领域
本发明涉及双向拉伸薄膜技术领域,尤其涉及一种哑光型金属化标签用BOPP热封薄膜及其制备方法。
背景技术
随着人们生活质量的提升,对商品的标签要求有着明显的提高。标签不仅要完整展示商品的关键卖点,还要具有有美观、高档和安全防伪等优点,普通BOPP/BOPET印刷膜或热收缩膜已无法满足各类高档商品标签的要求,现急需一种高档商品标签。
发明内容
基于背景技术存在的技术问题,本发明提出了一种哑光型金属化标签用BOPP热封薄膜及其制备方法,本发明不仅拥有良好的机械物理性能,同时具有高镀铝牢度、优异的消光均匀性和细腻性,适用于制作各种电子设备、化妆品以及烟酒的高档标签,提高产品标签的视觉效果。
本发明提出的一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂2-3份、马来酸酐接枝改性物2-3份、热封料94-96份;
所述芯层的原料按重量份包括:抗静电剂0-2份,均聚聚丙烯98-100份;
所述消光层1和消光层2均为BOPP用消光料,BOPP用消光料的原料按重量包括:40-50份聚丙烯、40-50份高密度聚乙烯、0-1份含氟高聚物和0-2份抗氧剂。
优选地,所述哑光型金属化标签用BOPP热封薄膜的厚度为35-100μm。
优选地,消光层1和消光层2的厚度之和为4-6μm,热封层的厚度为2-3μm。
优选地,热封料是丙烯和丁烯的共聚物,其中,丁烯的含量为10-20wt%。
优选地,马来酸酐接枝改性物是马来酸酐接枝丙烯-乙烯的共聚物。
优选地,有机抗粘剂由均聚聚丙烯和PMMA微珠共挤制得,其中,PMMA微珠的含量为10-15wt%,PMMA微珠的粒径为3-4μm。
优选地,抗静电剂包括季铵盐。
优选地,均聚聚丙烯等规度为96-99%,熔融指数为2-4g/10min。
优选地,BOPP用消光料的熔融指数为2.5-4g/10min。
本发明还提出了上述哑光型金属化标签用BOPP热封薄膜的制备方法,包括以下步骤:
S1、将芯层原料添加至主挤出机中,于240-260℃加热成熔融状态,将热封层、消光层1和消光层2的原料分别加入三台辅助挤出机中加热成熔融状态;
S2、分别将四台挤出机中的熔体过滤后,传输至具有4层结构的模头中汇合并挤出,并贴附到激冷辊上形成铸片,水浴冷却,再除水得到干燥铸片,其中,激冷辊温度为25-30℃,水浴温度为25-30℃;
S3、将干燥铸片经纵向预热、拉伸和定型处理形成厚片;其中,预热温度为100-115℃,拉伸温度为95-105℃,定型温度为115-130℃,拉伸倍率为4.5-5.5倍;
S4、将厚片先经170-180℃预热,然后横向拉伸、热定型得到薄膜,其中,拉伸温度为150-155℃,定型温度为160-170℃;
S5、将薄膜经风冷、展平、切边、测厚、电晕处理,然后收卷得到哑光型金属化标签用BOPP热封薄膜。
优选地,在S2中,主挤出机的滤网为400目,辅助挤出机的滤网均为120目。
有益效果:
本发明选用马来酸酐接枝改性物和丙烯-丁烯共聚物,提高薄膜镀铝牢度,镀铝层附着力(以镀铝层脱落面积表示)达到0%;选用的BOPP用消光料在控制析出物的同时提高薄膜雾度及消光均匀细腻性,薄膜雾度高达85%,光泽度小于10%;有机抗粘剂由均聚聚丙烯和PMMA微珠共挤制得,使得薄膜易开口、不沾粘;且本发明的制备条件适应于普通BOPP生产线;
本发明产品制成的标签视觉效果细腻、立体感突出,可显著提升商品的档次感和精致感,刺激消费者购买欲,适用于制作各种电子设备、化妆品以及烟酒的高档标签。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
下述实施例中的所述均聚聚丙烯等规度为96-99%,熔融指数为2-4g/10min。
实施例1
一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂2份、马来酸酐接枝丙烯-乙烯的共聚物2份、热封料96份;
其中,热封料是丙烯和丁烯的共聚物,其中,丁烯的含量为10wt%;
有机抗粘剂由均聚聚丙烯和PMMA微珠共挤制得,其中,PMMA微珠的含量为15wt%,PMMA微珠的粒径为3μm;
所述芯层的原料为均聚聚丙烯;
所述消光层1和消光层2均为BOPP用消光料,BOPP用消光料的原料按重量包括:50份聚丙烯、40份高密度聚乙烯、1份含氟高聚物,其中,BOPP用消光料的熔融指数为4g/10min;
热封层的厚度为2μm,消光层1和消光层2层的厚度之和为4μm,芯层厚度为40μm。
上述哑光型金属化标签用BOPP热封薄膜的制备方法,包括以下步骤:
S1、将芯层原料添加至主挤出机中,于240-260℃加热成熔融状态,将热封层、消光层1和消光层2的原料分别加入三台辅助挤出机中加热成熔融状态;
S2、分别将四台挤出机中的熔体过滤后,经连接杆传输至具有4层结构的模头中汇合并挤出,并利用压缩空气贴附到激冷辊上形成铸片,水浴冷却,再利用橡胶辊筒及压缩空气对冷却后的铸片除水得到干燥铸片,其中,主挤出机的滤网为400目,辅助挤出机的滤网均为120目,激冷辊温度为25-30℃,水浴温度为25-30℃;
S3、将干燥铸片经纵向预热、拉伸和定型处理形成厚片;其中,预热温度为100-115℃,拉伸温度为95-105℃,定型温度为115-130℃,拉伸倍率为4.5-5.5倍;
S4、将厚片先经170-180℃预热,然后横向拉伸、热定型得到薄膜,其中,拉伸温度为150-155℃,定型温度为160-170℃;
S5、将薄膜经风冷、展平、切边、测厚、电晕处理,然后收卷得到哑光型金属化标签用BOPP热封薄膜。
实施例2
一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂2份、马来酸酐接枝丙烯-乙烯的共聚物3份、热封料95份;
所述芯层为均聚聚丙烯;
所述消光层1和消光层2均为BOPP用消光料;
热封层的厚度为2μm,消光层1和消光层2层的厚度之和为6μm,芯层厚度为38μm;
其中,热封料、有机抗粘剂、BOPP用消光料同实施例1。
上述哑光型金属化标签用BOPP热封薄膜的制备方法同实施例1。
实施例3
一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂2份、马来酸酐接枝丙烯-乙烯的共聚物3份、热封料95份;
所述芯层的原料按重量份包括:抗静电剂2份,均聚聚丙烯98份;其中,抗静电剂的主要成分是季铵盐;
所述消光层1和消光层2均为BOPP用消光料;
热封层的厚度为3μm,消光层1和消光层2层的厚度之和为6μm,芯层厚度为37μm;
其中,热封料、有机抗粘剂、BOPP用消光料同实施例1。
上述哑光型金属化标签用BOPP热封薄膜的制备方法同实施例1。
实施例4
一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,所述热封层的原料按重量份包括:有机抗粘剂3份、马来酸酐接枝丙烯-乙烯的共聚物3份、热封料94份;
其中:热封料是丙烯和丁烯的共聚物,丁烯含量为20wt%;
有机抗粘剂由均聚聚丙烯和PMMA微珠共挤制得,其中,PMMA微珠的含量为10wt%,PMMA微珠的粒径为4μm。
所述芯层的原料按重量份包括:抗静电剂1份,均聚聚丙烯99份;其中,抗静电剂的主要成分是季铵盐;
所述消光层1和消光层2均为BOPP用消光料,BOPP用消光料的原料按重量包括:40份聚丙烯、50份高密度聚乙烯、2份抗氧剂,其中,BOPP用消光料的熔融指数为2.5g/10min;
热封层的厚度为2μm,消光层1和消光层2层的厚度之和为4μm,芯层厚度为40μm。
上述哑光型金属化标签用BOPP热封薄膜的制备方法同实施例1。
对比例
CN201910735919公开的一种复合包装用高剥离强度BOPP消光膜及其制备方法,制备的BOPP消光膜。
对实施例1-3和对比例进行检测,结果如下表所示:
检测项目 | 镀铝层附着力/% | 热封强度/(N/15mm) | 雾度/% | 光泽度% | 表面电阻/Ω |
对比例 | 15 | 无热封性能 | 81 | 10 | 3.0*10<sup>13</sup> |
实施例1 | 2.5 | 4.6 | 78.5 | 8.2 | 3.0*10<sup>12</sup> |
实施例2 | 0 | 4.4 | 84.6 | 7.7 | 2.8*10<sup>12</sup> |
实施例3 | 0 | 5.6 | 85.1 | 7.5 | 2.5*10<sup>11</sup> |
实施例4 | 0 | 6.7 | 80.1 | 8.0 | 3.2*10<sup>11</sup> |
备注:镀铝层附着力按BB/T 0030的规定进行测试,薄膜热封强度按GB/T 10003的规定进行测试,薄膜雾度按GB/T 2410的规定进行测试,光泽度按GB/T 8807的规定进行测试,其中入射角为45°。
由上表可以看出,本发明所述哑光型金属化标签用BOPP热封薄膜在雾度、和光泽度与对比例相近,但薄膜的镀铝层附着力、热封强度指标明显优于对比例。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种哑光型金属化标签用BOPP热封薄膜,依次由热封层、芯层、消光层1和消光层2组成,其特征在于,所述热封层的原料按重量份包括:有机抗粘剂2-3份、马来酸酐接枝改性物2-3份、热封料94-96份;
所述芯层的原料按重量份包括:抗静电剂0-2份,均聚聚丙烯98-100份;
所述消光层1和消光层2均为BOPP用消光料,BOPP用消光料的原料按重量包括:40-50份聚丙烯、40-50份高密度聚乙烯、0-1份含氟高聚物和0-2份抗氧剂。
2.根据权利要求1所述哑光型金属化标签用BOPP热封薄膜,其特征在于,所述哑光型金属化标签用BOPP热封薄膜的厚度为35-100μm。
3.根据权利要求1或2所述哑光型金属化标签用BOPP热封薄膜,其特征在于,消光层1和消光层2的厚度之和为4-6μm,热封层的厚度为2-3μm。
4.根据权利要求1-3任一项所述哑光型金属化标签用BOPP热封薄膜,其特征在于,热封料是丙烯和丁烯的共聚物,其中,丁烯的含量为10-20wt%。
5.根据权利要求1-4任一项所述哑光型金属化标签用BOPP热封薄膜,其特征在于,马来酸酐接枝改性物是马来酸酐接枝丙烯-乙烯的共聚物。
6.根据权利要求1-5任一项所述哑光型金属化标签用BOPP热封薄膜,其特征在于,有机抗粘剂由均聚聚丙烯和PMMA微珠共挤制得,其中,PMMA微珠的含量为10-15wt%,PMMA微珠的粒径为3-4μm。
7.根据权利要求1-6任一项所述哑光型金属化标签用BOPP热封薄膜,其特征在于,抗静电剂包括季铵盐。
8.根据权利要求1-7任一项所述哑光型金属化标签用BOPP热封薄膜,其特征在于,均聚聚丙烯等规度为96-99%,熔融指数为2-4g/10min;优选地,BOPP用消光料的熔融指数为2.5-4g/10min。
9.一种如权利要求1-8任一项所述哑光型金属化标签用BOPP热封薄膜的制备方法,其特征在于,包括以下步骤:
S1、将芯层原料添加至主挤出机中,于240-260℃加热成熔融状态,将热封层、消光层1和消光层2的原料分别加入三台辅助挤出机中加热成熔融状态;
S2、分别将四台挤出机中的熔体过滤后,传输至具有4层结构的模头中汇合并挤出,并贴附到激冷辊上形成铸片,水浴冷却,再除水得到干燥铸片,其中,激冷辊温度为25-30℃,水浴温度为25-30℃;
S3、将干燥铸片经纵向预热、拉伸和定型处理形成厚片;其中,预热温度为100-115℃,拉伸温度为95-105℃,定型温度为115-130℃,拉伸倍率为4.5-5.5倍;
S4、将厚片先经170-180℃预热,然后横向拉伸、热定型得到薄膜,其中,拉伸温度为150-155℃,定型温度为160-170℃;
S5、将薄膜经风冷、展平、切边、测厚、电晕处理,然后收卷得到哑光型金属化标签用BOPP热封薄膜。
10.根据权利要求9所述哑光型金属化标签用BOPP热封薄膜的制备方法,其特征在于,在S2中,主挤出机的滤网为400目,辅助挤出机的滤网均为120目。
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