CN111234340A - 一种透视性高的电磁屏蔽膜材料及其制备方法 - Google Patents

一种透视性高的电磁屏蔽膜材料及其制备方法 Download PDF

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CN111234340A
CN111234340A CN201811430411.9A CN201811430411A CN111234340A CN 111234340 A CN111234340 A CN 111234340A CN 201811430411 A CN201811430411 A CN 201811430411A CN 111234340 A CN111234340 A CN 111234340A
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electromagnetic shielding
shielding film
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high transparency
nano silver
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牟跃东
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Changzhou Changrui Technology Co Ltd
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Abstract

本发明属于电磁屏蔽技术领域，特别涉及一种透视性高的电磁屏蔽膜材料及其制备方法，电磁屏蔽膜材料的组成包括低密度聚乙烯、纳米银线、二氧化硅、热稳定剂、润滑剂、分散剂，制备过程中，先将各组分混合充分，然后将所得混合物加入到挤出机中挤出制备成母料，将所得母料熔融后挤出吹张成薄膜制品。

Description

一种透视性高的电磁屏蔽膜材料及其制备方法
技术领域
本发明属于电磁屏蔽技术领域，特别涉及一种透视性高的电磁屏蔽膜材料及其制备方法。
背景技术
随着现代科技的发展，电视机、计算机、微波炉、手机、地铁、电加工设备都会发出不同程度的电磁辐射，这种看不见、摸不到的电磁污染被人们称为“隐形杀手”，已称为继水污染、大气污染、噪音污染后当今人们生活中的第四大污染。
电磁屏蔽膜是一种具有电磁防护性能的贴膜，当电磁波的传递路径遇到电磁屏蔽薄膜时会发生传输方向上的变化。
发明内容
本发明提供了一种透视性高的电磁屏蔽膜材料及其制备方法，膜材料的组成包括低密度聚乙烯、纳米银线、二氧化硅、热稳定剂、润滑剂、分散剂，
其中，热稳定剂包括硬脂酸锌、硬脂酸钙等，
润滑剂包括石蜡、脂肪族酰胺，
分散剂为偶联剂物质，
按重量份数计算为，低密度聚乙烯100份、纳米银线4～10份、二氧化硅5～8份、热稳定剂3～5份、润滑剂2～4份、分散剂1.5～2份，
低密度聚乙烯作为基体，保证了成膜后的力学性能及透明度，得到的膜产品可视度比较理想；
纳米银线具有导电性能，而且相比于其他形态的导电填料，线与线之间能在基材中形成大面积的导电网络，导电稳定性更有保障，
纳米银线的制备方法为，将无机银盐溶解于乙二醇中，并加入分散剂，充分混合后进行加热反应，反应完成后降温至常温，对反应体系进行离心处理，将离心后的固体充分清洗后干燥，得到纳米银线；
二氧化硅起到消光、吸收广波的作用，而且由于加入量有限，不会影响成膜后的透光度；
本发明提供了一种上述透视性高的电磁屏蔽膜材料的制备方法：
首先将低密度聚乙烯、纳米银线、二氧化硅、热稳定剂、润滑剂、分散剂混合充分，然后将混合物加入到挤出机中挤出制备成母料，将所得母料熔融后挤出吹张成薄膜制品。
具体实施方式
以下各实施例中，纳米银线的制备方法为，将硝酸银固体溶解于乙二醇中，并加入分散剂PVP，充分混合后所得的分散液中硝酸银的浓度为0.08mol/L、PVP的浓度为0.1mol/L，将所得的分散液于75℃下进行加热反应20分钟，反应完成后自然降温至25℃，对反应体系进行离心处理，将离心后的固体用去离子水充分清洗后于75℃的烘箱中干燥充分，得到纳米银线。
实施例1
一种透视性高的电磁屏蔽膜材料的制备方法，首先，按重量份数计算为，将100份低密度聚乙烯、6.5份纳米银线、6份二氧化硅、3.5份硬脂酸锌、2份脂肪族酰胺、2份硅烷偶联剂加入高速混合机混合充分，然后将所得混合物加入到双螺杆挤出机中于185℃下挤出，经水冷、拉条、切粒后得到母料；将所得母料加入吹膜机于160℃下熔融塑化，并经由150℃的口模挤出，经吹胀牵引得到薄膜。
实施例2
一种透视性高的电磁屏蔽膜材料的制备方法，首先，按重量份数计算为，将100份低密度聚乙烯、8.5份纳米银线、5份二氧化硅、4份硬脂酸锌、3.5份石蜡、2.5份硅烷偶联剂加入高速混合机混合充分，然后将所得混合物加入到双螺杆挤出机中于185℃下挤出，经水冷、拉条、切粒后得到母料；将所得母料加入吹膜机于160℃下熔融塑化，并经由150℃的口模挤出，经吹胀牵引得到薄膜。
以上各实施例制备的复合薄膜的性能检测如下：
厚度 拉伸强度 透光率 雾度 屏蔽性能
实施例1 200μm 18N/mm 93％ 11％ 43db
实施例2 200μm 17N/mm 97％ 10％ 46db

Claims (7)

1.一种透视性高的电磁屏蔽膜材料，其特征在于：所述的电磁屏蔽膜材料的组成包括低密度聚乙烯、纳米银线、二氧化硅、热稳定剂、润滑剂、分散剂。
2.如权利要求1所述的透视性高的电磁屏蔽膜材料，其特征在于：所述的热稳定剂包括硬脂酸锌、硬脂酸钙。
3.如权利要求1所述的透视性高的电磁屏蔽膜材料，其特征在于：所述的润滑剂包括石蜡、脂肪族酰胺。
4.如权利要求1所述的透视性高的电磁屏蔽膜材料，其特征在于：所述的分散剂为偶联剂物质。
5.如权利要求1所述的透视性高的电磁屏蔽膜材料，其特征在于：所述的纳米银线的制备方法为，将无机银盐溶解于乙二醇中，并加入分散剂，充分混合后进行加热反应，反应完成后降温至常温，对反应体系进行离心处理，将离心后的固体充分清洗后干燥，得到纳米银线。
6.如权利要求1所述的透视性高的电磁屏蔽膜材料，其特征在于：按重量份数计算为，低密度聚乙烯100份、纳米银线4～10份、二氧化硅5～8份、热稳定剂3～5份、润滑剂2～4份、分散剂1.5～2份。
7.一种如权利要求1至6任一项所述的透视性高的电磁屏蔽膜材料的制备方法，其特征在于：所述的制备方法为，首先将低密度聚乙烯、纳米银线、二氧化硅、热稳定剂、润滑剂、分散剂混合充分，然后将所得混合物加入到挤出机中挤出制备成母料，将所得母料熔融后挤出吹张成薄膜制品。
CN201811430411.9A 2018-11-28 2018-11-28 一种透视性高的电磁屏蔽膜材料及其制备方法 Withdrawn CN111234340A (zh)

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