耳机聚氨酯涂层起泡失效原因分析  

Cause Analysis of Blistering Failure of Polyurethane Coating on a Headphone

作　　者：王丽娟 张伟 曾志卫 WANG Lijuan;ZHANG Wei;ZENG Zhiwei(Shenzhen Meixin Testing Technology Co.Ltd,Shenzhen 518108,China)

机构地区：[1]深圳市美信检测技术股份有限公司,广东深圳518108

出　　处：《聚氨酯工业》2024年第4期45-48,共4页Polyurethane Industry

摘　　要：失效样品为配有耳机线的耳机涂层,涂层的主材质是聚氨酯,在使用过程中涂层出现起泡。为了找到涂层起泡的原因,对耳机涂层起泡位置与正常位置进行电子形貌和元素成分对比,采用溶液萃取的方式进行成分对比,并对配套的耳机线进行元素分析和成分分析。结果表明,涂层起泡位置相对于正常位置,多出磷(P)元素,P是以磷酸三苯酯、磷酸甲苯二苯酯等有机P系阻燃剂形式进入涂层内部,使涂层发生溶胀,脱离基体引起涂层起泡。磷酸三苯酯、磷酸甲苯二苯酯等有机P系阻燃剂来自配套使用的耳机线,在周围环境下发生挥发、迁移至涂层内部导致样品失效。本研究提出有效的改善措施,避免此类失效再次发生。The failed sample was a headphone coating,equipped with headphone wires.The main material of the coating was polyurethane,and blisters were appeared in the coating during used.In order to find the cause of coating blistering,electronic morphology and elemental composition were compared between the blistering position and the normal position of the headphone coating.The composition was compared using solution extraction,and elemental and compositional analysis was performed on the matching headphone wires.The results showed that the blisering position of the coating had more phosphorus(P)than the normal position,and P entered the interior of the coating in the form of organic P-based flame retardants such as triphenyl phosphate and toluene diphenyl phosphate,causing the coating to swell and detach from the substrate,resulting in coating blistering.Organic P-series flame retardants such as triphenyl phosphate and toluene diphenyl phosphate came from paired headphone wires,which evaporated and migrated to the interior of the coating in the surrounding environment.The effective improvement measures to prevent such failures from happening again was proposed.

关 键 词：聚氨酯 耳机 涂层 起泡 磷酸酯 阻燃剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]