电工膜用高纯聚丙烯脱灰技术研究  

Deashing technology of high purity polypropylene for electrical film

作　　者：周昌浩 邢照亮 姜涛 李健 ZHOU Changhao;XING Zhaoiang;JIANG Tao;LI Jian(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.,Ltd.),Beijing 102200,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]全球能源互联网研究院有限公司先进输电技术国家重点研究室,北京102200

出　　处：《化学工业与工程》2024年第1期103-110,共8页Chemical Industry and Engineering

摘　　要：开发低灰分聚丙烯专用料、突破国外“卡脖子”技术,对于我国BOPP薄膜行业乃至整个电力电容器产业都具有重要意义。设计了“己烷+乙酰乙酸乙酯”双组分复配洗涤溶剂体系,针对本身灰分含量较低的聚丙烯树脂进行深度洗涤脱灰处理,进一步降低ZN催化剂体系下残余在聚丙烯内的残余的Ti、Mg和Al元素,得到了低于20μg·g^(-1)的聚丙烯粉料,灰分脱除率可达70%以上。针对洗涤剂种类、洗涤时间、洗涤温度和洗涤配比等工艺进行了系统研究,对聚丙烯产品的理化性能和电气性能等进行表征。结果表明洗涤前后的薄膜击穿强度从562.3提升至632.8 kV·mm^(-1),电导率从2.0×10^(-11)降低至1.0×10^(-11) S·m^(-1)。It is of great significance for China’s BOPP film industry and even the whole power capacitor industry to develop the ultra-low ash polypropylene material and break through the“Strangle”technology abroad.In this study,a“hexane+ethyl acetoacetate”two-component composite washing solvent system was designed,and the polypropylene resin with low ash content was subjected to deep washing and deash-ing treatment,the content of Ti,Mg and Al in PP was further reduced,and the ash removal rate of PP powder was over 70%,which was lower than 20μg·g^(-1).The influence of detergent types,washing time,washing temperature and washing ratio were studied,and the physical and chemical properties and elec-trical properties of polypropylene were characterized.The results showed that the film breakdown strength increased from 562.3 to 632.8 kV·mm^(-1) and the conductivity decreased from 2.0×10^(-11) to 1.0×10^(-11) S·m^(-1)before and after washing.

关 键 词：聚丙烯 树脂 灰分 BOPP薄膜 电容器 脱灰 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]