CN106003957A - 一种抗静电pa薄膜 - Google Patents
一种抗静电pa薄膜 Download PDFInfo
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Abstract
本发明公开了一种抗静电PA薄膜,所述抗静电PA薄膜自下而上依次包括第一导电层、PA基层、第二导电层、耐磨层,所述第一导电层和第二导电层各自为附着有碳纳米管的PA层;所述耐磨层为附着有耐摩擦剂的PA层。本发明在基材的两面均设置导电层,可以消除PA膜两面的静电,在用于包装材料时更容易操作,可以防止静电累积导致的电击、放电等潜在危险,也可防止静电累积导致的污染、灰尘等。在PA膜的表面设置耐磨层,可以降低薄膜的耐摩擦系数,提高薄膜耐久性。
Description
技术领域
本发明涉及一种抗静电PA薄膜。
背景技术
尼龙(Nylon,Polyamide,简称PA)是指由聚酰胺类树脂构成的塑料。尼龙具有机械强度高,韧性好,有较高的抗拉、抗压强度;耐疲劳性能突出,制件经多次反复屈折仍能保持原有机械强度;软化点高,耐热;表面光滑,摩擦系数小,耐磨、耐腐蚀;电绝缘性好等优点。
PA薄膜表面电阻或体积电阻率较高,但是在许多应用中,当因摩擦、剥离或感应过程会使PA薄膜表面产生及积累静电荷,这些特性会导致严重的潜在危险,如吸尘、电击、放电甚至燃烧和爆炸。为避免发生这类危险,对其进行抗静电改性是工业上常用的有效方法,目的是降低塑料表面静电荷的生成及积累。
发明内容
本发明提供了一种抗静电PA薄膜。
本发明采用的技术方案是:
一种抗静电PA薄膜,所述抗静电PA薄膜自下而上依次包括第一导电层、PA基层、第二导电层、耐磨层,所述第一导电层和第二导电层各自为附着有碳纳米管的PA层;所述耐磨层为附着有耐摩擦剂的PA层。
进一步,所述第一导电层、PA基层、第二导电层、耐磨层通过共挤出制得所述抗静电PA薄膜。
进一步,所述第一导电层的厚度为1~100μm,优选10~50μm;PA基层的厚度为10~500μm,第二导电层的厚度为1~100μm,优选10~50μm;耐磨层的厚度为1~50μm,优选5~20μm;。
所述第一导电层和第二导电层的表面电阻率在103~106Ω。
本发明中,所述第一导电层和第二导电层各自为附着有碳纳米管的PA层,可采用添加有(可以是内掺或者附着方式)碳纳米管的PA材料制作而成。
所述耐磨层为附着有耐摩擦剂的PA层,可采用添加有(可以是内掺或者附着方式)耐摩擦剂的PA材料制作而成。
所述耐摩擦剂为纳米无机粉体,如纳米碳酸钙、纳米硅酸钙、纳米二氧化硅、纳米黏土等。
本发明提供的抗静电PA薄膜可按以下方法制得:
(1)制作添加有碳纳米管的第一导电母粒:取PA基体材料和碳纳米管,碳纳米管的添加量为1~10%,其中还可加入润滑剂、抗氧剂等助剂,挤出造粒制得第一导电母粒;
(2)制作添加有碳纳米管的第二导电母粒:同步骤(1)
(3)制作添加有耐摩擦剂的耐磨母粒:取PA基体材料和耐摩擦剂,耐摩擦剂的添加量为1~5%,其中还可加入润滑剂、抗氧剂等助剂,挤出造粒制得耐磨母粒;
(4)PA基材母粒、第一导电母粒、第二导电母粒、耐磨母粒按照图1所示的上下层次顺序,多层共挤出制得。具体的,通过多台的挤出机分别使每种母粒熔融塑化后,注入同一模头中,然后经过进一步加工处理(吹塑、流延或双向拉伸),制得多层复合抗静电PA薄膜。
本发明在基材的两面均设置导电层,可以消除PA膜两面的静电,在用于包装材料时更容易操作,可以防止静电累积导致的电击、放电等潜在危险,也可防止静电累积导致的污染、灰尘等。在PA膜的表面设置耐磨层,可以降低薄膜的耐摩擦系数,提高薄膜耐久性。
附图说明
图1本发明的抗静电PA薄膜的结构示意图。
图中,1-第一导电层;2-PA基层;3-第二导电层;4-耐磨层。
具体实施方式
下面以具体实施例来对本发明的技术方案做进一步说明,但本发明的保护内容不限于此。
实施例1
如图1所示,抗静电PA薄膜自下而上依次包括第一导电层1、PA基层2、第二导电层3、耐磨层4。
第一导电层1的厚度为10μm,表面电阻率为1×104Ω;PA基层2的厚度为100μm,第二导电层3的厚度为10μm,表面电阻率为1×104Ω;耐磨层4的厚度为10μm。
第一导电层1和第二导电层3各自为附着有碳纳米管的PA层;耐磨层4为附着有耐摩擦剂的PA层。
抗静电PA薄膜按以下方法制得:
(1)制作添加有碳纳米管的第一导电母粒:取PA基体材料和碳纳米管,碳纳米管的添加量为5%,其中还可加入润滑剂、抗氧剂等助剂,挤出造粒制得第一导电母粒;
(2)制作添加有碳纳米管的第二导电母粒:同步骤(1)
(3)制作添加有耐摩擦剂的耐磨母粒:取PA基体材料和耐摩擦剂,耐摩擦剂可选用纳米碳酸钙,耐摩擦剂的添加量为3%,其中还可加入润滑剂、抗氧剂等助剂,挤出造粒制得耐磨母粒;
(4)PA基材母粒、第一导电母粒、第二导电母粒、耐磨母粒按照图1所示的上下层次顺序,多层共挤出制得。具体的,通过多台的挤出机分别使每种母粒熔融塑化后,注入同一模头中,然后经过进一步加工处理(吹塑、流延或双向拉伸),制得多层复合抗静电PA薄膜。
以上所述仅为本发明的优选实施例,凡跟本发明权利要求范围所做的均等变化和修饰,均应属于本发明权利要求的范围。
Claims (4)
1.一种抗静电PA薄膜,其特征在于所述抗静电PA薄膜自下而上依次包括第一导电层、PA基层、第二导电层、耐磨层,所述第一导电层和第二导电层各自为附着有碳纳米管的PA层;所述耐磨层为附着有耐摩擦剂的PA层。
2.如权利要求1所述的抗静电PA薄膜,其特征在于所述第一导电层、PA基层、第二导电层、耐磨层通过共挤出制得所述抗静电PA薄膜。
3.如权利要求1所述的抗静电PA薄膜,其特征在于所述第一导电层的厚度为1~100μm,PA基层的厚度为10~500μm,第二导电层的厚度为1~100μm,耐磨层的厚度为1~50μm。
4.如权利要求1所述的抗静电PA薄膜,其特征在于所述第一导电层和第二导电层的表面电阻率在103~106Ω。
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CN104851515A (zh) * | 2014-12-31 | 2015-08-19 | 东莞市纳利光学材料有限公司 | 一种导电薄膜的制备方法 |
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CN101214722A (zh) * | 2007-12-28 | 2008-07-09 | 四川大学 | 制备可设计层状聚合物基导电复合材料的方法 |
CN101217066A (zh) * | 2008-01-21 | 2008-07-09 | 四川大学 | 层状聚合物基ptc材料及其制备方法 |
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