聚酰胺酰亚胺（英语：Polyamide-imide，PAI）是为一种热塑性或热固性非结晶聚合物，具有优异机械性能、耐热性能以及耐化学腐蚀性，此等性能使聚酰胺酰亚胺为兼顾价格与性能时之优先考量，本聚合物常使用于电线制程中做为电线涂层；聚酰胺酰亚胺可由异氰酸酯及偏苯三酸酐于N-甲基吡咯烷酮行逐步聚合得之。 聚酰胺酰亚胺如其名，分子链中同时含有酰胺及酰亚胺官能团，兼具聚酰胺及聚酰亚胺之优点：高机械强度、可熔融加工性、高耐热性及优秀之耐化学腐蚀性；聚酰胺酰亚胺可进行各式加工如射出成形或压制成各式构件及锭状，亦可作为涂层、纤维、薄膜乃至黏着剂，一般而言聚酰胺酰亚胺于成形过程中会经热固化以提升机械性能。

Polyamide-imides are either thermosetting or thermoplastic, amorphous polymers that have exceptional mechanical, thermal and chemical resistant properties. Polyamide-imides are used extensively as wire coatings in making magnet wire. They are prepared from isocyanates and TMA (trimellic acid-anhydride) in n-methyl-2-pyrrolidone (NMP). A prominent distributor of polyamide-imides is Solvay Specialty Polymers, which uses the trademark Torlon.