CN112721370A - 一种bopp珠光膜及其制备方法和应用 - Google Patents

一种bopp珠光膜及其制备方法和应用 Download PDF

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CN112721370A
CN112721370A CN202011482694.9A CN202011482694A CN112721370A CN 112721370 A CN112721370 A CN 112721370A CN 202011482694 A CN202011482694 A CN 202011482694A CN 112721370 A CN112721370 A CN 112721370A
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bopp
layer
antistatic
pearlized
film according
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李力
黄险波
叶南飚
陈平绪
刘乐文
王斌
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Kingfa Science and Technology Co Ltd
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Abstract

本发明提供了一种BOPP珠光膜及其制备方法和应用功能。所述BOPP珠光膜包括静电吸附层、抗静电层，所述静电吸附层和抗静电层之间，还设有珠光芯层；所述静电吸附层的组分包括聚烯烃基材及驻极体，所述聚烯烃基材为聚烯烃共聚物或弹性体；所述抗静电层的组分包括均聚聚丙烯、永久型抗静电剂及非迁移型开口助剂。本发明通过对珠光膜的结构进行细化改进，使其具有静电吸附的一面具有持久的静电效果；同时，其抗静电面又有良好的抗静电效果，同时保持良好的开口性能，其用于制备面膜时可以很好地解决面膜粘连的问题。

Description

一种BOPP珠光膜及其制备方法和应用
技术领域
本发明涉及膜材技术领域，更具体地涉及一种BOPP珠光膜及其制备方法和应用。
背景技术
随着现在人们生活水平越来越高，无论女人还是男人，越来越多人对自己的容貌关注起来，对于皮肤保养等的需求也在日益增长，因此使面膜等市场的也在逐日壮大。一般的面膜是包含珠光膜底膜和面膜纸质层，在实际应用中，是一层珠光膜加一层面膜纸质层放入相应的包装袋中，然后往包装袋中注入相关的精华液，使用的时候两层拿起来，然后将珠光膜揭下，珠光膜作为一个底材，它本身具有一定功能性，当批量生产的时候，珠光膜的一面需要具有一定的静电吸附性能，另一面具有排斥静电的性能，这样才能避免不同组合之间的粘连。现在市场上常规的珠光膜，表层使用的是普通均聚PP，并给其表面打上电晕后，实现静电吸附的效果，但是由于均聚PP本身的性能，导致这样的静电效果不持久，并且不均匀，因此往往在包装过程中非常不稳定，给包装工厂带来很多返工的成本，另外具有排斥静电的一面却也因为抗静电效果不稳定的问题，也可能会导致多组(以一层珠光膜加一层面膜纸为一组)面膜组合会被放入包装袋中，同样也会造成返工。现有技术中缺乏解决该技术问题的教导。
发明内容
本发明的目的是为了克服现有技术的不足，提供一种BOPP珠光膜，所述BOPP珠光膜的静电吸附层具有持久的静电吸附效果，抗静电层又有稳定的抗静电效果，用于制备面膜时可以很好地解决面膜粘连的问题。
本发明的另一个目的在于提供所述BOPP珠光膜的制备方法。
本发明的另一个目的在于提供所述BOPP珠光膜的应用。
本发明上述目的通过如下技术方案予以实现：
一种BOPP珠光膜，包括静电吸附层、抗静电层，所述静电吸附层和抗静电层之间，还设有珠光芯层；所述静电吸附层的组分包括聚烯烃基材及驻极体，所述聚烯烃基材为聚烯烃共聚物或弹性体；所述抗静电层的组分包括均聚聚丙烯、永久型抗静电剂及开口助剂。
本发明中，创新地对珠光膜的结构进行改进，在静电吸附层中，加入了驻极剂，驻极剂具有储存静电的功能，提升了静电吸附层在电晕处理后的静电效果，另外，为了使达到更好的静电效果，采用聚烯烃共聚物或弹性体替换了常规的均聚聚丙烯，其与驻极剂的共同作用，使得静电吸附层在电晕处理后的静电效果稳定持久。在抗静电层中，通过永久抗静电剂的加入，使得抗静电效果持久，另外，所述非迁移型开口助剂的加入不仅使抗静电层保持良好的开口性能，还避免了对抗静电性能的影响，保证了抗静电性能的持久稳定。本发明中，芯层可以参照普通的珠光膜制备。
优选地，静电吸附层、芯层、抗静电层占所述BOPP珠光膜的厚度比例为10～20％：60～80％：10～20％。
优选地，所述静电吸附层中，包括如下按重量份计算的组分：
聚烯烃共聚物或弹性体 84～99份；
驻极体 0.5～15份；
其他加工助剂 0～1份。
所述聚烯烃共聚物或弹性体，可以是二元或三元共聚聚丙烯、POE弹性体、乙丙橡胶、PP弹性体等一种或者多种复配。
优选地，所述聚烯烃共聚物或弹性体的熔融指数在230℃，2.16kg下为1～30g/10min。
所述驻极体具有储存静电的功能。所述驻极体可以是无机驻极体或有机驻极体。
优选地，所述无机驻极体为二氧化硅、氧化铝和/或电气石中的一种或几种。
优选地，所述有机驻极体为受阻胺、三嗪类物质、酰亚胺和/或氟化物中的一种或几种。
优选地，静电吸附层中，所述其他加工助剂为根据需要添加的赋予更好的分散、抗氧化、抗老化等功能的助剂。优选地，所述其他加工助剂为蜡类分散剂、抗氧剂和/或抗老化剂。
静电吸附层材料的制备方法，可以采用双螺杆挤出机进行熔融共混挤出制备。挤出温度优选为180～220℃。为了更有利于分散，所述双螺杆挤出机的螺杆长径比优选为44：1～52：1。此长径比下，更有利于静电吸附层的各组分分散均匀。
优选地，所述抗静电层中，包括如下按重量份计算的组分：
Figure BDA0002838556050000031
优选地，所述均聚聚丙烯的熔融指数在230℃，2.16kg下为1～10g/10min。
所述永久型抗静电剂通常是高分子型抗静电剂，其不容易发生迁移。
由于抗静电层还需要有开口的效果，因此通常需要加入开口助剂。本发明中，选用的非迁移型开口助剂优选为无定型二氧化硅、玻璃微珠、滑石粉或硅酮中的一种或几种。更优选地，所述非迁移型开口助剂更优选为硅酮和/或玻璃微珠，最优选为硅酮。
优选地，抗静电层中，所述其他加工助剂为根据需要添加的赋予更好的分散、抗氧化、抗老化等功能的助剂。优选地，所述其他加工助剂为酯类分散剂、抗氧剂和/或抗老化剂。
抗静电层材料的制备方法，可以采用双螺杆挤出机进行熔融共混挤出制备。挤出温度优选为180～220℃。由于永久型抗静电剂的加入，需要考虑尽量避免其加工过程中发生分解而失效，优选地，所述双螺杆挤出机的螺杆长径比优选为40：1～48：1。此长径比下，更有利于抗静电层的各组分分散均匀，同时避免永久型抗静电剂的分解。
所述珠光芯层的组分及制备可以参照现有的珠光膜。优选地，所述珠光芯层包括均聚聚丙烯、珠光母粒及钛白粉母粒。
更具体地，所述珠光芯层中，包括如下按重量份计算的组分：
均聚聚丙烯 60～87份；
珠光母粒 10～30份；
钛白粉母粒 3～10份。
所述BOPP珠光膜的制备方法，包括如下步骤：
S1.分别制备静电吸附层母粒、芯层母粒、抗静电层母粒；
S2.将S1.的三种母粒分别加入BOPP生产线中，三层挤出，得到膜材；
S3.对S2.的膜材进行双向拉伸，并对静电吸附层进行电晕处理，得到所述BOPP珠光膜。
优选地，所述S2.中，挤出的温度为200～220℃。
优选地，所述S3.中，所述电晕处理的功率为15～25KW。
所述BOPP珠光膜在制备面膜底材中的应用。
与现有技术相比，本发明具有以下有益技术效果：
本发明通过对珠光膜的结构进行细化改进，提供了一种全新的珠光膜，其具有静电吸附的一面具有持久的静电效果；同时，其抗静电面又有良好的抗静电效果，同时保持良好的开口性能，其用于制备面膜时可以很好地解决面膜粘连的问题。
具体实施方式
下面结合具体实施例和对比例对本发明做进一步的详细说明，但本发明并不限于下述实施例。
实施例中，未有特别说明的原料均为常规市售商品。
各原料如表1所示：
表1
Figure BDA0002838556050000041
Figure BDA0002838556050000051
分散剂采用蜡类分散剂，617A，霍尼韦尔。
抗氧剂采用抗氧剂1010和抗氧剂168的按1:1重量比例复配抗氧剂。
实施例1～4
静电吸附层母粒制备
按表2配方，将材料投到高速混合机混合，并通过长径比为48:1的双螺杆挤出机熔融共混挤出，熔融段温度180～220℃，得到静电吸附层母粒。
其中，对比方案1所用均聚聚丙烯为PP L5E89，购自广西石化。
表2
Figure BDA0002838556050000052
表2中，各物质以重量份计算。
抗静电层母粒制备
按表3配方，将材料投到高速混合机混合，并通过长径比为48:1的双螺杆挤出机熔融共混挤出，熔融段温度180～220℃，得到抗静电层母粒。
表3
Figure BDA0002838556050000061
另外，以均聚聚丙烯：珠光母粒：钛白粉母粒＝75:20:5的比例，螺杆长径比为48:1的双螺杆挤出机熔融共混挤出，熔融段温度180～220℃，制备芯层母粒。
按照表4的组合，将三种静电吸附层母粒、芯层母粒、抗静电层母粒分别加入BOPP生产线中，三层挤出，工艺温度控制在200～220℃，得到膜材；并对膜材进行双向拉伸，并对静电吸附层进行电晕处理，电晕处理的功率为20KW，得到所述BOPP珠光膜。
表4
Figure BDA0002838556050000062
Figure BDA0002838556050000071
实施例1～4及对比例1～5的静电吸附层及抗静电层的性能测试见表5。
表面电位性能体现了薄膜表面的静电大小，同时也是静电吸附的一个表现，使用日本日春的KASUGA KSD-1000数显静电电位测试仪进行测试，表面摩擦性能体现了一定的开口性能，根据GB/T 10006-1988《塑料和薄片摩擦系数测定方法》进行测试，表面电阻表现了表面的抗静电性能，根据GB/T 1410-2006《固体绝缘材料体积电阻率和表面电阻率试验方法》进行测试。
表5
Figure BDA0002838556050000072
Figure BDA0002838556050000081
从实施例1～实施例4可以看出，本发明提供的BOPP珠光膜的静电吸附层具有良好的静电吸附性能，其抗静电层不仅具有良好的抗静电性能，而且具有良好的开口性能。从对比例1的对比可以看出，普通的均聚PP经过电晕处理的静电吸附性能较差，并且不能持久，不均匀，制备薄膜一周后的电位性能变化就可以反映，因此不稳定；从对比例2可以看出，单纯的均聚聚丙烯构成的抗静电层表面的抗静电性能和开口性能均不佳；从对比例3可以看出，如果抗静电层中不加入开口剂，会对薄膜的开口有所影响，摩擦力升高，导致薄膜复卷困难，影响下游生产；从对比例4可以看出，如果选用会迁移的开口剂，抗静电层表面的抗静电性能刚开始并没有太大影响，但是经过一段时间，其迁移到表面，由于其与静电层的接触，会影响到静电层的静电吸附，导致其静电吸附不均匀；从对比例5可以看出，如果选用非永久的抗静电剂，抗静电层表面的抗静电性能短期内与永久抗静电剂相比效果略差，同时由于这些非永久抗静电剂本身也是一种迁移性的小分子，其经过一段时间(半年以上)后，也会影响静电层的静电吸附。

Claims (10)

1.一种BOPP珠光膜，其特征在于，包括静电吸附层、抗静电层，所述静电吸附层和抗静电层之间，还设有珠光芯层；所述静电吸附层的组分包括聚烯烃基材及驻极体，所述聚烯烃基材为聚烯烃共聚物或弹性体；所述抗静电层的组分包括均聚聚丙烯、永久型抗静电剂及非迁移型开口助剂。
2.根据权利要求1所述BOPP珠光膜，其特征在于，静电吸附层、芯层、抗静电层占所述BOPP珠光膜的厚度比例为10～20％：60～80％：10～20％。
3.根据权利要求1所述BOPP珠光膜，其特征在于，所述静电吸附层中，包括如下按重量份计算的组分：
聚烯烃共聚物或弹性体 84～99份；
驻极体 0.5～15份；
其他加工助剂 0～1份。
4.根据权利要求1或3所述BOPP珠光膜，其特征在于，所述驻极体为无机驻极体或有机驻极体。
5.根据权利要求1或3所述BOPP珠光膜，其特征在于，所述聚烯烃共聚物或弹性体的熔融指数在230℃，2.16kg下为1～30g/10min。
6.根据权利要求1所述BOPP珠光膜，其特征在于，所述抗静电层中，包括如下按重量份计算的组分：
Figure FDA0002838556040000011
7.根据权利要求1或6所述BOPP珠光膜，其特征在于，所述均聚聚丙烯的熔融指数在230℃，2.16kg下为1～10g/10min。
8.根据权利要求1所述BOPP珠光膜，其特征在于，所述非迁移型开口助剂为无定型二氧化硅、玻璃微珠、滑石粉或硅酮中的一种或几种。
9.权利要求1～8任一项所述BOPP珠光膜的制备方法，包括如下步骤：
S1.分别制备静电吸附层母粒、芯层母粒、抗静电层母粒；
S2.将S1.的三种母粒分别加入BOPP生产线中，三层挤出，得到膜材；
S3.对S2.的膜材进行双向拉伸，并对静电吸附层进行电晕处理，得到所述BOPP珠光膜。
10.权利要求1至8任一项所述BOPP珠光膜在制备面膜底材中的应用。
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