双向拉伸PET薄膜耐湿热性能研究  

Research on wet-heat resistance of biaxially orientation PET film

作　　者：唐荣芝[1] 罗春明[1,2] 梁洁 江春慧 彭宗仁 王启强[3] TANG Rong-zhi;LUO Chun-ming;LIANG Jie;JIANG Chun-hui;PENG Zong-ren;WANG Qi-qiang(Sichuan EM Technology CO.,Lid.,Mianyang 621000 China;State Key Laboratory of Electrical Material and Electrical Insulation,Xian Jiotong Uiversiy,Xi'an0049 China;Mianyang POLYTECHNIC,Mianyang 621000 China)

机构地区：[1]四川东材科技集团股份有限公司,四川绵阳621000 [2]西安交通大学电工材料电气绝缘全国重点实验室,陕西西安710049 [3]绵阳职业技术学院,四川绵阳621000

出　　处：《聚酯工业》2023年第6期19-22,共4页Polyester Industry

摘　　要：本文研究了端羧基含量、特性黏度、拉伸倍数、热定型温度和二甘醇含量对双向拉伸PET薄膜耐湿热性能的影响。结果表明,端羧基含量越低、特性黏度越高,PET薄膜耐湿热性能越好;而拉伸倍数和热定型温度对PET断裂伸长率的影响均为先增大再减小,其主要影响PET的结晶度,结晶度越高,其耐湿热性能越好。二甘醇含量对PET薄膜的耐湿热性能影响较小。PET薄膜的耐湿热性能越好,在长期使用环境中具有更长的使用寿命。In this paper,the effects of carboxyl group content,intrinsic viscosity,draw ratio,heat setting temperature and diethylene glycol content on the wet-heat resistance of biaxially orientation PET film were studied.The results show that the lower the carboxyl group content and the higher the intrinsic viscosity,the better the wet-heat resistance of the PET film;while the effects of draw ratio and heat setting temperature on the elongation of PET both increase first and then decrease.It mainly affects the crystallinity of PET film,the higher the crystallinity,the better its wet-heat resistance.Diethylene glycol content has litle effect on the wet-heat resistance of PET film.The better the wet-heat resistance of the PET film,the longer the service life in the long-term use environment.

关 键 词：双向拉伸 PET 薄膜 耐湿热性能 

分 类 号：TB383[一般工业技术—材料科学与工程]