CN108251006B - 一种用于感光干膜的聚丙烯型保护膜及其生产方法 - Google Patents
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Abstract
一种用于感光干膜的聚丙烯型保护膜,所述保护膜由哑面层、粘附层、芯层复合而成,所述芯层位于哑面层和粘附层之间,所述哑面层包括LDPE100份、防粘剂0.1~0.5份;所述粘附层包括低密度聚乙烯100份、离型剂0.1~0.3份;所述芯层包括共聚PP60~80份,粘结剂18~39份,长效抗静电剂1~2份。本发明综合PP及PE干膜的优点,通过多层共挤工艺制作出一种感光干膜保护膜,总厚度范围广,可以制作出比现有技术更薄的薄膜,降低使用成本。模体的抗拉强度大于等于35MPa,断裂伸长率大于等于200%。使产品外观、粘附力等与现有市场主流产品一致,又具有抗拉伸,设备适应性广,成本低,生产效率高的保护膜产品。
Description
技术领域
本发明涉及高分子材料技术领域,特别是一种用于感光干膜的聚丙烯型保护膜及其生产方法。
背景技术
干膜是一种高分子的化合物,它通过紫外线的照射后能够产生一种聚合反应形成一种稳定的物质附着于PET载体上,从而达到阻挡电镀和蚀刻的功能。
干膜一般分为三层,一层为干膜保护膜,中间层是干膜层,另一层是PET载体保护层。干膜保护膜层和PET载体保护层都只是起保护作用,在压膜和显影前必须要去掉。干膜在生产过程中,将紫外光聚合物涂布在PET载体保护层上,再将干膜保护膜覆盖其上,形成双面保护。在生产线路板过程中,线路板基板镀铜后,将表面粗糙处理,再将干膜覆盖其上,此时干膜的两面保护膜必须撕下,撕下保护膜的干膜经过光照、显影、镀铜的蚀刻等过程后去除。干膜保护膜在此干膜生产过程中主要作用是:
1、保持干膜表面平整、高透明、高强度,防止干膜变形;
2、抗静电、防刮花,从而防止干膜失效;
3、防止灰尘、脏物污染干膜;
4、防损伤;
5、减少干膜与空气的接触,缓解衰减、老化,延长保质期。
目前市场上供应的干膜保护膜通常为聚乙烯、聚丙烯质材,这两种质材的保护膜在实际使用中均存在不同的问题,其中PE保护膜:较柔软,卷绕中易出现变形;刚性不足,易收缩变形。PP保护膜:刚性高,但PP材料自身静电大,在后道使用工序中,对干膜的质量造成很大影响,粘结力不稳定。
发明内容
本发明的目的是针对现有技术不足,提供一种用于感光干膜的聚丙烯型保护膜及其生产方法,以解决上述背景技术中存在的问题。
本发明的技术方案是构造一种用于感光干膜的聚丙烯型保护膜,所述保护膜由哑面层、粘附层、芯层复合而成,所述芯层位于哑面层和粘附层之间,所述哑面层包括LDPE100份、防粘剂0.1~0.5份;所述粘附层包括低密度聚乙烯100份、离型剂0.1~0.3份;所述芯层包括共聚PP60~80份,粘结剂18~39份,长效抗静电剂1~2份。
作为优选,所述保护膜的厚度为12~25微米。
作为优选,所述哑面层的厚度小于总厚度的30%,大于或等于总
厚度的10%。
作为优选,粘附层的厚度小于总厚度的30%,大于或等于总厚度的10%。
作为优选,所述防粘剂为硅藻土、滑石粉或粉状二氧化硅中的一种。
作为优选,所述离型剂为硅酮粉或聚乙烯醇的一种。
作为优选,所述粘结剂为聚烯烃类弹性体、聚氨酯类热塑性弹性体、聚酰胺类热塑性弹性体中的一种。
作为优选,所述长效抗静电剂为聚环氧乙烷、聚醚酯酰胺、聚乙二醇、丙烯酸甲酯、季铵盐基甲基丙烯酸酯共聚物中的一种或多种组合。
一种用于感光干膜的聚丙烯型保护膜的生产方法,包括:按配方将材料混合后分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜;产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
本发明综合PP及PE干膜的优点,通过多层共挤工艺制作出一种感光干膜保护膜,总厚度范围广,可以制作出比现有技术更薄的薄膜,降低使用成本。模体的抗拉强度大于等于35MPa,断裂伸长率大于等于200%。使产品外观、粘附力等与现有市场主流产品一致,又具有抗拉伸,设备适应性广,成本低,生产效率高的保护膜产品。
具体实施方式
为了便于理解本发明,下面将对本发明进行更全面的描述。本发明可以以不同的形式来实现,并不限于本文所描述的实施例。相反的,提供这些实施例的目的是使对本发明的公开内容更加透彻全面。
实施例1:粘附层:LDPE(低密度聚乙烯)100份、硅酮粉0.1份。芯层:共聚PP(聚丙烯)60份,聚烯烃类弹性体(茂金属催化剂合成的聚烯烃热塑性弹性体乙烯—辛烯共聚物)39份,聚醚酯酰胺1份共混。哑面层:LDPE100份、硅藻土0.5份。上述三层材料分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜。产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
实施例2:粘附层:LDPE100份、聚乙烯醇0.1份。芯层:共聚PP80份,聚氨酯类热塑性弹性体18份,聚环氧乙烷1.5份共混。哑面层:LDPE100份、滑石粉0.5份。上述三层材料分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜。产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
实施例3:粘附层:LDPE100份、硅酮粉0.3份。芯层:共聚PP60份,聚烯烃类弹性体(茂金属催化剂合成的聚烯烃热塑性弹性体乙烯—辛烯共聚物)39份,聚乙二醇2份共混。哑面层:LDPE100份、滑石粉2份。上述三层材料分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜。产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
实施例4:粘附层:LDPE100份、聚乙烯醇0.1份。芯层:共聚PP60份,聚酰胺类热塑性弹性体39份,季铵盐基甲基丙烯酸酯共聚物1.8份共混。哑面层:LDPE100份、硅藻土0.5份。上述三层材料分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜。产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
实施例5:粘附层:LDPE100份,硅酮粉0.3份。芯层:共聚PP60份,聚烯烃类弹性体39份,聚乙二醇1份、丙烯酸甲酯0.5份共混。哑面层:LDPE100份、粉状二氧化硅0.2份。上述三层材料分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜。产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
将本发明实施例1~5所得产品与从市场上买到的韩国和某国内公司产品进行对比,得到以下测试指标:
经测试,本发明产品成本低,产品厚度更小,刚性高,因此具有广泛的社会和经济价值。
最后,应当指出,以上具体实施方式仅是本发明较有代表性的例子。显然,本发明不限于上述具体实施方式,还可以有许多变形。凡是依据本发明的技术实质对以上具体实施方式所作的任何简单修改、等同变化与修饰,均应认为属于本发明的保护范围。
Claims (2)
1.一种用于感光干膜的聚丙烯型保护膜,其特征在于所述保护膜由哑面层、粘附层、芯层复合而成,所述芯层位于哑面层和粘附层之间,所述哑面层包括LDPE100份、防粘剂0.1~0.5份;所述粘附层包括低密度聚乙烯100份、离型剂0.1~0.3份;所述芯层包括共聚PP60~80份,粘结剂18~39份,长效抗静电剂1~2份;所述保护膜的厚度为12~25微米;所述哑面层的厚度小于总厚度的30%,大于或等于总厚度的10%;粘附层的厚度小于总厚度的30%,大于或等于总厚度的10%;所述防粘剂为硅藻土、滑石粉、粉状二氧化硅中的一种;所述离型剂为硅酮粉或聚乙烯醇的一种;所述粘结剂为聚烯烃类弹性体、聚氨酯类热塑性弹性体、聚酰胺类热塑性弹性体中的一种;所述长效抗静电剂为聚环氧乙烷、聚醚酯酰胺、聚乙二醇、丙烯酸甲酯、季铵盐基甲基丙烯酸酯共聚物中的一种或多种组合。
2.一种生产如权利要求1所述的一种用于感光干膜的聚丙烯型保护膜的生产方法,其特征在于:按配方将材料混合后分别经过三台单螺杆挤出机进行熔融,再经过配料块连接器、模头共挤和冷却进行成膜;产品后续经过冷却定型、厚度检测、在线分切、收卷及包装,得到最终产品感光干膜保护膜。
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CN111440556B (zh) * | 2019-09-29 | 2022-02-22 | 宁波激智科技股份有限公司 | 一种保护膜及其制备方法 |
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