电工膜用高纯聚丙烯脱灰技术研究

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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20 μg·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。

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	周昌浩
	邢照亮
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	李健

关键词：聚丙烯树脂灰分 BOPP薄膜电容器脱灰

Abstract： 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 deashing 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 20 μg·g^-1. The influence of detergent types, washing time, washing temperature and washing ratio were studied, and the physical and chemical properties and electrical 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.

Keywords： polypropylene resin ash BOPP film capacitor dewashing

Received 2022-08-03;

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Corresponding Authors: 李健,副教授,E-mail:lijian@tust.edu.cn。 Email: lijian@tust.edu.cn

About author: 周昌浩(1998-),男,硕士研究生,现从事聚丙烯洗涤脱灰方面的研究。

引用本文:

周昌浩, 邢照亮, 姜涛, 李健.电工膜用高纯聚丙烯脱灰技术研究[J]. 化学工业与工程, 2024,41(1): 103-110

ZHOU Changhao, XING Zhaoliang, JIANG Tao, LI Jian.Deashing technology of high purity polypropylene for electrical film[J]. Chemcial Industry and Engineering, 2024,41(1): 103-110

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