CN113214515A - 一种正反双面抗静电复合型离型膜 - Google Patents
一种正反双面抗静电复合型离型膜 Download PDFInfo
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Abstract
本发明公开了一种正反双面抗静电复合型离型膜,其特征在于,由上至下依次包括正面离型剂涂层(1)、正面抗静电层(2)、基材原膜层(3)、反面抗静电层(4)、反面离型剂涂层(5);所述基材原膜层(3)的厚度为30~70μm;所述正面抗静电层(2)和反面抗静电层(4)的厚度为15~25μm;所述正面离型剂涂层(1)和反面离型剂涂层(5)的厚度为4~8μm。本发明所述的正反双面抗静电复合型离型膜正反面均具有抗静电功能,避免离型膜上电荷积聚,可应用于电子行业,防止离型膜产生的静电击穿电子元件的线路板。
Description
技术领域
本发明属于离型膜技术领域,特别涉及一种正反双面抗静电复合型离型膜。
背景技术
离型膜是指薄膜表面能有区分的薄膜,离型膜与特定的材料在有限的条件下接触后不具有粘性,或轻微的粘性,广泛应用于电子电力、IT显示屏、手机、LCD/PDA、医疗、家电制造、防伪材料、半导体、汽车、铭板、陶瓷片制造、胶带生产及模切行业。
随着LCD、LED、PC、手机等行业的发展,对离型膜的需求与日俱增,并且要求越来越高,其中之一就是要求离型膜具备抗静电的功能。普通的离型膜由于自身基材是聚酯材料,属于绝缘体,在收卷和放卷过程中容易产生静电,而静电轻则会导致吸附灰尘,影响后期加工质量,重则会导致与之接触的电子元器件被高压放电损坏。
专利CN109796690A公开了一种防静电型多颜色多膜种离型膜的制备方法,由树脂粉、辅助剂、润滑剂、色母粒、抗氧化剂、防静电剂混合造粒,模压后电晕处理,再喷布离型剂后制得;其中防静电剂是聚乙炔、磷酸钠、十二烷基磺酸钠、乙氧基化硬脂酞胺的混合物,防静电效果并不理想。
因此,上述问题亟待解决。
发明内容
发明目的:为了克服以上不足,本发明的目的是提供一种正反双面抗静电复合型离型膜,正反面均具有抗静电功能,避免离型膜上电荷积聚,可应用于电子行业,防止离型膜产生的静电击穿线路板。
技术方案:为了实现上述目的,本发明提供了一种正反双面抗静电复合型离型膜,由上至下依次包括正面离型剂涂层、正面抗静电层、基材原膜层、反面抗静电层、反面离型剂涂层;所述基材原膜层的厚度为30~70μm;所述正面抗静电层和反面抗静电层的厚度为15~25μm;所述正面离型剂涂层和反面离型剂涂层的厚度为4~8μm。
进一步的,上述的正反双面抗静电复合型离型膜,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子50~60份,PP粒子15~25份,PI粒子10~20份。
进一步的,上述的正反双面抗静电复合型离型膜,所述正面抗静电层按重量比包括以下成分:碳纳米管20~25份、环氧树脂30~35份、硅油5~9份、消泡剂0.5~2份、流平剂0.5~2份、氧化锡0.5~2份。本发明所述的正反双面抗静电复合型离型膜中,碳纳米管骨架结构中含有sp3和sp2杂化的碳原子,且在其边壁和端帽部分存在大量结构缺陷,可与电子给体和电子受体发生掺杂,因此碳纳米管具有良好的导电性,可作为抗静电材料;氧化锡是一种优秀的透明导电材料,与碳纳米管协同发挥抗静电作用。
进一步的,上述的正反双面抗静电复合型离型膜,所述反面抗静电层按重量比包括以下成分:聚噻吩20~30份、异丙醇30~40份、分散剂5~10份、超细金属粉末8~12份。本发明所述的正反双面抗静电复合型离型膜中,聚噻吩是一种导电高分子材料,在聚噻吩的掺杂过程中,聚噻吩链上极化子和孤子的存在与跃迁导致电荷在聚合物的链上以及链与链之间移动实现导电,从而具有抗静电作用;采用聚噻吩和超细金属粉末作为抗静电剂,二者协同作用,抗静电能力更强。
进一步的,上述的正反双面抗静电复合型离型膜,所述正面离型剂涂层为无硅离型剂涂层或硬脂酸盐离型剂涂层;所述反面离型剂涂层为无硅离型剂涂层或硬脂酸盐离型剂涂层。
更进一步的,上述的正反双面抗静电复合型离型膜,所述消泡剂为乙二醇二硬脂酸酯、聚氧丙烯聚氧乙烯甘油醚中的一种。
更进一步的,上述的正反双面抗静电复合型离型膜,所述流平剂为聚二甲基硅氧烷。
更进一步的,上述的正反双面抗静电复合型离型膜,所述分散剂为脂肪酸甲酯磺酸钠、聚丙烯酰胺中的一种。
更进一步的,上述的正反双面抗静电复合型离型膜,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为银粉、铝粉中的一种。
上述技术方案可以看出,本发明具有如下有益效果:
1.本发明所述的正反双面抗静电复合型离型膜在基材原膜层的两面分别增加了正面抗静电层和反面抗静电层,再在外层分别设置正面离型剂涂层和反面离型剂涂层,不影响基材原膜层的功能的同时,使基材原膜层的正反两面都具有了抗静电功能,有效避免离型膜上发生电荷聚集,防止离型膜产生的静电击穿电子元件的线路板。
2.本发明所述的正反双面抗静电复合型离型膜中正面抗静电层采用碳纳米管和氧化锡共同作为抗静电剂:碳纳米管骨架结构中含有sp3和sp2杂化的碳原子,且在其边壁和端帽部分存在大量结构缺陷,可与电子给体和电子受体发生掺杂,因此碳纳米管具有良好的导电性,可作为抗静电材料;氧化锡是一种优秀的透明导电材料,与碳纳米管协同发挥抗静电作用。
3.本发明所述的正反双面抗静电复合型离型膜中反面抗静电层采用聚噻吩和超细金属粉末共同作为抗静电剂:聚噻吩是一种导电高分子材料,在聚噻吩的掺杂过程中,聚噻吩链上极化子和孤子的存在与跃迁导致电荷在聚合物的链上以及链与链之间移动实现导电,从而具有抗静电作用;采用聚噻吩和超细金属粉末作为抗静电剂,二者协同作用,抗静电能力更强。
附图说明
图1为本发明所述正反双面抗静电复合型离型膜的结构示意视图;
图中:1、正面离型剂涂层;2、正面抗静电层;3、基材原膜层;4、反面抗静电层;5、反面离型剂涂层。
具体实施方式
下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,旨在用于解释本发明,而不能理解为对本发明的限制。
在本发明的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中,除非另有说明,“多个”的含义是两个或两个以上,除非另有明确的限定。
在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中,除非另有明确的规定和限定,第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触,也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且,第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方,或仅仅表示第一特征水平高度小于第二特征。
下面将结合实施例以及具体实验数据,对本发明实施例中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通的技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例,都属于本发明的保护范围。
实施例1
如图1所示的正反双面抗静电复合型离型膜,由上至下依次包括正面离型剂涂层1、正面抗静电层2、基材原膜层3、反面抗静电层4、反面离型剂涂层5;所述基材原膜层3的厚度为70μm;所述正面抗静电层2和反面抗静电层4的厚度为25μm;所述正面离型剂涂层1和反面离型剂涂层5的厚度为8μm。
其中,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子60份,PP粒子25份,PI粒子20份。
并且,所述正面抗静电层按重量比包括以下成分:碳纳米管25份、环氧树脂35份、硅油9份、消泡剂2份、流平剂2份、氧化锡2份。
又,所述反面抗静电层按重量比包括以下成分:聚噻吩30份、异丙醇40份、分散剂10份、超细金属粉末12份。
并且,所述正面离型剂涂层为无硅离型剂涂层;所述反面离型剂涂层为硬脂酸盐离型剂涂层。
进一步的,所述消泡剂为乙二醇二硬脂酸酯。
此外,所述流平剂为聚二甲基硅氧烷。
并且,所述分散剂为脂肪酸甲酯磺酸钠。
进一步的,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为银粉。
实施例2
一种正反双面抗静电复合型离型膜,由上至下依次包括正面离型剂涂层1、正面抗静电层2、基材原膜层3、反面抗静电层4、反面离型剂涂层5;所述基材原膜层3的厚度为30μm;所述正面抗静电层2和反面抗静电层4的厚度为15m;所述正面离型剂涂层1和反面离型剂涂层5的厚度为4μm。
其中,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子50份,PP粒子15份,PI粒子10份。
并且,所述正面抗静电层按重量比包括以下成分:碳纳米管20份、环氧树脂30份、硅油5份、消泡剂0.5份、流平剂0.5份、氧化锡0.5份。
又,所述反面抗静电层按重量比包括以下成分:聚噻吩20份、异丙醇30份、分散剂5份、超细金属粉末8份。
并且,所述正面离型剂涂层为无硅离型剂涂层;所述反面离型剂涂层为硬脂酸盐离型剂涂层。
进一步的,所述消泡剂为乙二醇二硬脂酸酯。
此外,所述流平剂为聚二甲基硅氧烷。
并且,所述分散剂为脂肪酸甲酯磺酸钠。
进一步的,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为银粉。
实施例3
一种正反双面抗静电复合型离型膜,由上至下依次包括正面离型剂涂层1、正面抗静电层2、基材原膜层3、反面抗静电层4、反面离型剂涂层5;所述基材原膜层3的厚度为50μm;所述正面抗静电层2和反面抗静电层4的厚度为20μm;所述正面离型剂涂层1和反面离型剂涂层5的厚度为6μm。
其中,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子55份,PP粒子20份,PI粒子15份。
并且,所述正面抗静电层按重量比包括以下成分:碳纳米管22.5份、环氧树脂32.5份、硅油7份、消泡剂1.25份、流平剂1.25份、氧化锡1.25份。
又,所述反面抗静电层按重量比包括以下成分:聚噻吩25份、异丙醇35份、分散剂7.5份、超细金属粉末10份。
并且,所述正面离型剂涂层为硬脂酸盐离型剂涂层;所述反面离型剂涂层为硬脂酸盐离型剂涂层。
进一步的,所述消泡剂为聚氧丙烯聚氧乙烯甘油醚。
此外,所述流平剂为聚二甲基硅氧烷。
并且,所述分散剂为聚丙烯酰胺。
进一步的,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为铝粉。
实施例4
一种正反双面抗静电复合型离型膜,由上至下依次包括正面离型剂涂层1、正面抗静电层2、基材原膜层3、反面抗静电层4、反面离型剂涂层5;所述基材原膜层3的厚度为70μm;所述正面抗静电层2和反面抗静电层4的厚度为25μm;所述正面离型剂涂层1和反面离型剂涂层5的厚度为4μm。
其中,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子50份,PP粒子15份,PI粒子15份。
并且,所述正面抗静电层按重量比包括以下成分:碳纳米管20份、环氧树脂35份、硅油7份、消泡剂1份、流平剂1份、氧化锡2份。
又,所述反面抗静电层按重量比包括以下成分:聚噻吩30份、异丙醇30份、分散剂8份、超细金属粉末12份。
并且,所述正面离型剂涂层为无硅离型剂涂层;所述反面离型剂涂层为无硅离型剂涂层。
进一步的,所述消泡剂为乙二醇二硬脂酸酯。
此外,所述流平剂为聚二甲基硅氧烷。
并且,所述分散剂为脂肪酸甲酯磺酸钠。
进一步的,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为银粉。
对比例1
本对比例的离型膜与实施例1的区别仅在于所述正面离型剂层和基材原膜层之间无正面抗静电层。
对比例2
本对比例的离型膜与实施例1的区别仅在于所述反面离型剂层和基材原膜层之间无反面抗静电层。
测试例
将实施例1-4以及对比例1-2的产品在60℃×90%RH的条件下放置100小时,测试其表面电阻率,表面电阻率保持在106-1012欧姆/cm2为合格;测试结果如表1所示。
表1实施例1-4以及对比例1-2的表面电阻率
实验对象 | 表面电阻率(欧姆/cm<sup>2</sup>) |
实施例1 | 8.78×10<sup>6</sup> |
实施例2 | 1.34×10<sup>11</sup> |
实施例3 | 4.75×10<sup>9</sup> |
实施例4 | 5.86×10<sup>8</sup> |
对比例1 | 1.12×10<sup>13</sup> |
对比例2 | 1.36×10<sup>13</sup> |
由表1可知,实施例1-4所得的正反双面抗静电复合型离型膜表面电阻率均在106-1012欧姆/cm2范围内,抗静电能力强,符合电子行业抗静电离型膜的要求。
对比例1的离型膜由于没有正面抗静电层,表面电阻率明显增高,抗静电效果差;对比例2的离型膜由于没有反面抗静电层,表面电阻率也明显增高,抗静电效果差。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进,这些改进也应视为本发明的保护范围。
Claims (9)
1.一种正反双面抗静电复合型离型膜,其特征在于,由上至下依次包括正面离型剂涂层(1)、正面抗静电层(2)、基材原膜层(3)、反面抗静电层(4)、反面离型剂涂层(5);所述基材原膜层(3)的厚度为30~70μm;所述正面抗静电层(2)和反面抗静电层(4)的厚度为15~25μm;所述正面离型剂涂层(1)和反面离型剂涂层(5)的厚度为4~8μm。
2.根据权利要求1所述的正反双面抗静电复合型离型膜,其特征在于,所述基材原膜层是由PET、PE、PI组成的复合膜,按重量比包括以下成分:PET粒子50~60份,PP粒子15~25份,PI粒子10~20份。
3.根据权利要求1所述的正反双面抗静电复合型离型膜,其特征在于,所述正面抗静电层按重量比包括以下成分:碳纳米管20~25份、环氧树脂30~35份、硅油5~9份、消泡剂0.5~2份、流平剂0.5~2份、氧化锡0.5~2份。
4.根据权利要求1所述的正反双面抗静电复合型离型膜,其特征在于,所述反面抗静电层按重量比包括以下成分:聚噻吩20~30份、异丙醇30~40份、分散剂5~10份、超细金属粉末8~12份。
5.根据权利要求1所述的正反双面抗静电复合型离型膜,其特征在于,所述正面离型剂涂层为无硅离型剂涂层或硬脂酸盐离型剂涂层;所述反面离型剂涂层为无硅离型剂涂层或硬脂酸盐离型剂涂层。
6.根据权利要求3所述的正反双面抗静电复合型离型膜,其特征在于,所述消泡剂为乙二醇二硬脂酸酯、聚氧丙烯聚氧乙烯甘油醚中的一种。
7.根据权利要求3所述的正反双面抗静电复合型离型膜,其特征在于,所述流平剂为聚二甲基硅氧烷。
8.根据权利要求4所述的正反双面抗静电复合型离型膜,其特征在于,所述分散剂为脂肪酸甲酯磺酸钠、聚丙烯酰胺中的一种。
9.根据权利要求4所述的正反双面抗静电复合型离型膜,其特征在于,所述超细金属粉末的粒径范围为80~200nm;所述超细金属粉末为银粉、铝粉中的一种。
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