CN108454207B - 一种磨雾型易热封可里印pp薄膜及制备方法 - Google Patents
一种磨雾型易热封可里印pp薄膜及制备方法 Download PDFInfo
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Abstract
本发明属于包装材料技术领域,公开了一种磨雾型易热封可里印PP薄膜及制备方法,由电晕层、芯层和热封层组成,电晕层以质量分数计由双峰PE 0‑85份,二元共聚聚丙烯15‑100份,滑爽剂0‑1.5份、开口剂0‑1.5份及抗静电剂0‑1.5份组成,芯层以质量分数计由均聚聚丙烯85‑100份,POE 0‑15份,热封层以质量分数计由双峰PE 100份,滑爽剂0‑1.5份、开口剂0‑1.5份及抗静电剂0‑1.5份组成;使用三层共挤挤出机使各层配方混合料塑化,流延冷却成型,冷却温度26‑30℃,牵引,电晕处理,切边,收卷成膜。本发明具有很好的磨雾效果,热封性能好,用于高速包装。
Description
技术领域
本发明属于包装材料技术领域,尤其涉及一种磨雾型易热封可里印PP薄膜及制备方法。
背景技术
目前,业内常用的现有技术是这样的:塑料印刷包装膜因为透明、光泽度好,产品具有明亮、鲜艳等特点,从而替代纸张包装,但具有玻璃磨砂效果,呈现“雾”状的包装形态引起人们新的审美情趣,故而开发磨雾型的包装膜,外观看上去似磨砂玻璃,又像纸张包装,不会反光。现有制作磨雾型的包装膜技术一般用添加母料的方式,但加入后引起以下新的问题:1、母料成分是不同粒径的CaCO3、滑石粉等,加工流动性变差;2、薄膜热封性变差;3、薄膜物料机械性能会下降。
综上所述,现有技术存在的问题是:
(1)现有的磨雾型包装膜加工流动性差;
(2)薄膜热封性差;
(3)薄膜物料机械性能下降。
解决上述技术问题的难度和意义:
难度在于现有技术一般用添加母料的方式,母料成分是不同粒径的CaCO3、滑石粉等,要重新开发一种具有磨雾光学效果的配方,同时要保持或提高热封性、可里印等性能特点;意义在于可提高薄膜质量,增加机械性能,提高热封包装的速度。
发明内容
针对现有技术存在的问题,本发明提供了一种磨雾型易热封可里印PP薄膜及制备方法。
本发明是这样实现的,一种磨雾型易热封可里印PP薄膜由电晕层、芯层和热封层组成;
电晕层以质量分数计由双峰PE 0-85份,二元共聚聚丙烯15-100份,滑爽剂0-1.5份、开口剂0-1.5份及抗静电剂0-1.5份组成;
芯层以质量分数计由均聚聚丙烯85-100份,POE 0-15份;
热封层以质量分数计由双峰PE 100份,滑爽剂0-1.5份、开口剂0-1.5份及抗静电剂0-1.5份组成。
本发明的另一目的在于提供一种磨雾型易热封可里印PP薄膜的制备方法,包括以下步骤:
1、使用三层共挤挤出机使各层配方混合料塑化;
2、流延冷却成型,冷却温度26-30℃;
3、牵引,电晕处理;
4、切边,收卷成膜。
进一步,电晕层与热封层塑化温度220-240℃,芯层塑化温度220-250℃。
综上所述,本发明的优点及积极效果为:
本发明采用具有双峰结构的聚乙烯为原料,与聚丙烯三层共挤流延生产磨雾型薄膜,具有很好的磨雾效果,热封性能好,可以用于高速包装。与现有技术相比,相同40微米的薄膜,有如下明显优点和效果:
附图说明
图1是本发明实施例提供的磨雾型易热封可里印PP薄膜制备方法流程图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
如图1所示,针对现有技术存在的问题,本发明实施例提供的磨雾型易热封可里印PP薄膜的制备方法包括:
S101:使用三层共挤挤出机使各层配方混合料塑化;电晕层与热封层塑化温度230℃;芯层塑化温度230℃。
S102:流延冷却成型,冷却温度26-30℃;
S103:牵引,电晕处理;
S104:切边,收卷成膜。
实施例1:
电晕层以质量分数计由双峰PE 85份,二元共聚聚丙烯15份,滑爽剂0.5份、开口剂1.5份及抗静电剂0.5份组成;
芯层以质量分数计由均聚聚丙烯85份,POE 15份;
热封层以质量分数计由双峰PE 100份,滑爽剂1.5份、开口剂0.5份及抗静电剂0.5份组成;
使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度230℃,芯层塑化温度230℃,流延冷却成型,冷却温度30℃,牵引,电晕处理,切边,收卷成膜。
实施例2:
电晕层以质量分数计采用双峰PE 43份,二元共聚聚丙烯57份,滑爽剂0.7份、开口剂0.8份及抗静电剂0.7份;
芯层以质量分数计采用均聚聚丙烯92份及POE 8份;
热封层以质量分数计采用双峰PE 100份、滑爽剂0.8份、开口剂0.7份及抗静电剂0.7份;
使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度230℃,芯层塑化温度235℃,流延冷却成型,冷却温度26℃,牵引,电晕处理,切边,收卷成膜。
实施例3:
电晕层以质量分数计采用双峰PE65份,二元共聚聚丙烯35份,滑爽剂1.2份、开口剂1.0份及抗静电剂1.5份;
芯层以质量分数计采用均聚聚丙烯90份及POE 10份;
热封层以质量分数计采用双峰PE 100份、滑爽剂1.3份、开口剂1.5份及抗静电剂1.0份;
使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度240℃,芯层塑化温度250℃,流延冷却成型,冷却温度28℃,牵引,电晕处理,切边,收卷成膜。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,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。
Claims (8)
1.一种磨雾型易热封可里印PP薄膜,其特征在于,磨雾型易热封可里印PP薄膜由电晕层、芯层和热封层经三台挤出机共挤贴合在一起组成,结构为电晕层/芯层/热封层;
电晕层以质量分数计由双峰PE 85份,二元共聚聚丙烯15份,滑爽剂0.5份、开口剂1.5份及抗静电剂0.5份组成;
芯层以质量分数计由均聚聚丙烯85份,POE 15份;
热封层以质量分数计由双峰PE 100份,滑爽剂1.5份、开口剂0.5份及抗静电剂0.5份组成。
2.如权利要求1所述磨雾型易热封可里印PP薄膜,其特征在于,所述磨雾型易热封可里印PP薄膜电晕层以质量分数计采用双峰PE 43份,二元共聚聚丙烯57份,滑爽剂0.7份、开口剂0.8份及抗静电剂0.7份;芯层以质量分数计采用均聚聚丙烯92份及POE 8份;热封层以质量分数计采用双峰PE 100份、滑爽剂0.8份、开口剂0.7份及抗静电剂0.7份。
3.如权利要求1所述磨雾型易热封可里印PP薄膜,其特征在于,所述磨雾型易热封可里印PP薄膜电晕层以质量分数计采用双峰PE65份,二元共聚聚丙烯35份,滑爽剂1.2份、开口剂1.0份及抗静电剂1.5份;芯层以质量分数计采用均聚聚丙烯90份及POE 10份;热封层以质量分数计采用双峰PE 100份、滑爽剂1.3份、开口剂1.5份及抗静电剂1.0份。
4.一种如权利要求1-3任意一项所述磨雾型易热封可里印PP薄膜的制备方法,其特征在于,包括以下步骤:
(1)使用三层共挤挤出机使各层配方混合料塑化,经共挤模头使得三层料层叠在一起;
(2)流延冷却成型,冷却温度26-30℃;
(3)牵引,电晕处理;
(4)切边,收卷成膜。
5.如权利要求4所述磨雾型易热封可里印PP薄膜的制备方法,其特征在于,电晕层与热封层塑化温度220-240℃,芯层塑化温度220-250℃。
6.如权利要求4所述磨雾型易热封可里印PP薄膜的制备方法,其特征在于,所述磨雾型易热封可里印PP薄膜的制备方法还包括:使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度230℃,芯层塑化温度230℃,流延冷却成型,冷却温度30℃,牵引,电晕处理,切边,收卷成膜。
7.如权利要求4所述磨雾型易热封可里印PP薄膜的制备方法,其特征在于,所述磨雾型易热封可里印PP薄膜的制备方法还包括:
使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度230℃,芯层塑化温度235℃,流延冷却成型,冷却温度26℃,牵引,电晕处理,切边,收卷成膜。
8.如权利要求4所述磨雾型易热封可里印PP薄膜的制备方法,其特征在于,所述磨雾型易热封可里印PP薄膜的制备方法还包括:
使用三层共挤挤出机使各层配方混合料塑化,电晕层与热封层塑化温度240℃,芯层塑化温度250℃,流延冷却成型,冷却温度28℃,牵引,电晕处理,切边,收卷成膜。
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