CN103724804A - 一种电容器用聚烯烃混合金属化薄膜及其制备方法 - Google Patents
一种电容器用聚烯烃混合金属化薄膜及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种电容器用聚烯烃混合金属化薄膜,其特征在于,由下列重量份的原料制成:等规聚丙烯100、高压聚乙烯80-100、硬脂酸2-3、硫酸钠1-2、二烯丙基双酚A1-2、三乙醇胺1-2、苯并三氮唑1-2、促进剂CZ1.1-1.3、三丁基三氯化锡1-2、助剂5-6;本发明加工工艺简单,并且用其制作的薄膜电容器接触电阻小,从而使得产品特性好,本发明通过过滤,去除原料中的杂质,使原料性能好,降低了薄膜的报废率,不易破裂;添加助剂,增强了薄膜的阻隔性和气密性,具有良好的耐压性和耐冲击性,同时具有热封强度高、热封性能好的特点。
Description
技术领域
本发明涉及电容器制造领域,特别是一种电容器用聚烯烃混合金属化薄膜及其制备方法。
背景技术
薄膜电容器是以金属箔当电极,将其和聚乙酯,聚丙烯,聚笨乙烯或聚碳酸酯等塑料薄膜,从两端重叠后,卷绕成圆筒状的构造之电容器 ;在所有的塑料薄膜电容当中,聚丙烯(PP)电容和聚苯乙烯(PS)电容的特性最为显著,当然这两种电容器的价格也比较高,电容器的薄膜质量直接影响电容器的使用寿命和产品性能,电容器薄膜的需求量大、种类多,采用单一原料生产的薄膜很难适应市场的要求,但每种原料都有其不足之处,所以生产出来的薄膜很难满足各种情况的需求。
电容器用双向拉伸聚丙烯薄膜具有较高的机械性能和电气性能,与普通型薄膜制得的电容器相比,用聚丙烯薄膜制得的电容器以其热收缩率低、性能稳定、耐高温、耐高压,防止击穿等显著优点,使得聚丙烯薄膜制得的电容器的使用范围越来越广。
发明内容
本发明的目的是提供一种电容器用聚烯烃混合金属化薄膜及其制备方法。
为了实现本发明的目的,本发明通过以下方案实施:
一种电容器用聚烯烃混合金属化薄膜,由下列重量份的原料制成:等规聚丙烯100、高压聚乙烯80-100、硬脂酸2-3、硫酸钠1-2、二烯丙基双酚A 1-2、三乙醇胺1-2、苯并三氮唑1-2、促进剂CZ1.1-1.3、三丁基三氯化锡1-2、助剂5-6;
所述助剂由下列重量份的原料制成:茂金属线性低密度聚乙烯12-15、甲基三乙氧基硅烷1-2、二茂铁1-2、椴木灰烬1-2、促进剂TMTD 1-2;制备方法是将茂金属线性低密度聚乙烯加热至熔融状态,加入其它成分,搅拌分散均匀,冷却,造粒,即得。
本发明所述电容器用聚烯烃混合金属化薄膜,由以下具体步骤制成:
(1)将等规聚丙烯、高压聚乙烯、硬脂酸、硫酸钠、二烯丙基双酚A加热熔融,再加入助剂以及其余剩余成分充分搅拌,送入挤出机熔融、过滤,然后再通过挤出机挤出片状熔体,过滤>1200目,所述挤出机的温度为220-260℃;
(2)将步骤(1)制成的片状熔体通过激冷辊及风淋室冷却定型后制得铸片,依次进行纵向拉伸、横向拉伸、粗化面电晕处理;
(3)收卷、第一次时效处理、第二次时效处理;
(4)真空蒸发金属化膜,粗化面形成金属化层。
本发明加工工艺简单,并且用其制作的薄膜电容器接触电阻小,从而使得产品特性好,本发明通过过滤,去除原料中的杂质,使原料性能好,降低了薄膜的报废率,不易破裂;添加助剂,增强了薄膜的阻隔性和气密性,具有良好的耐压性和耐冲击性,同时具有热封强度高、热封性能好的特点。
具体实施方式
下面通过具体实例对本发明进行详细说明。
一种电容器用聚烯烃混合金属化薄膜,由下列重量份(公斤)的原料制成:等规聚丙烯100、高压聚乙烯80、硬脂酸2、硫酸钠1、二烯丙基双酚A 1、三乙醇胺1、苯并三氮唑1、促进剂CZ1.1、三丁基三氯化锡1、助剂5;
所述助剂由下列重量份(公斤)的原料制成:茂金属线性低密度聚乙烯12、甲基三乙氧基硅烷1、二茂铁1、椴木灰烬1、促进剂TMTD 1;制备方法是将茂金属线性低密度聚乙烯加热至熔融状态,加入其它成分,搅拌分散均匀,冷却,造粒,即得。
本发明所述电容器用聚烯烃混合金属化薄膜,由以下具体步骤制成:
(1)将等规聚丙烯、高压聚乙烯、硬脂酸、硫酸钠、二烯丙基双酚A加热熔融,再加入助剂以及其余剩余成分充分搅拌,送入挤出机熔融、过滤,然后再通过挤出机挤出片状熔体,过滤>1200目,所述挤出机的温度为220-260℃;
(2)将步骤(1)制成的片状熔体通过激冷辊及风淋室冷却定型后制得铸片,依次进行纵向拉伸、横向拉伸、粗化面电晕处理;
(3)收卷、第一次时效处理、第二次时效处理;
(4)真空蒸发金属化膜,粗化面形成金属化层。
本发明实施例的金属化薄膜的技术指标如下 :
(1)横向收缩率≤ 0.2%、纵向收缩率≤ 2.5%
(2)横向拉伸强度≥ 19Mpa、纵向拉伸强度≥ 14Mpa ;
(3)最小击穿电压 611Vv/um 。
Claims (2)
1.一种电容器用聚烯烃混合金属化薄膜,其特征在于,由下列重量份的原料制成:等规聚丙烯100、高压聚乙烯80-100、硬脂酸2-3、硫酸钠1-2、二烯丙基双酚A 1-2、三乙醇胺1-2、苯并三氮唑1-2、促进剂CZ1.1-1.3、三丁基三氯化锡1-2、助剂5-6;
所述助剂由下列重量份的原料制成:茂金属线性低密度聚乙烯12-15、甲基三乙氧基硅烷1-2、二茂铁1-2、椴木灰烬1-2、促进剂TMTD 1-2;制备方法是将茂金属线性低密度聚乙烯加热至熔融状态,加入其它成分,搅拌分散均匀,冷却,造粒,即得。
2.根据权利要求1所述电容器用聚烯烃混合金属化薄膜,其特征在于,由以下具体步骤制成:
(1)将等规聚丙烯、高压聚乙烯、硬脂酸、硫酸钠、二烯丙基双酚A加热熔融,再加入助剂以及其余剩余成分充分搅拌,送入挤出机熔融、过滤,然后再通过挤出机挤出片状熔体,过滤>1200目,所述挤出机的温度为220-260℃;
(2)将步骤(1)制成的片状熔体通过激冷辊及风淋室冷却定型后制得铸片,依次进行纵向拉伸、横向拉伸、粗化面电晕处理;
(3)收卷、第一次时效处理、第二次时效处理;
(4)真空蒸发金属化膜,粗化面形成金属化层。
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