Fiber polyimide, wanda kuma aka sani da fiber P84, fiber ne mai juriya mai zafi tare da kyakkyawan juriya mai zafi.A 300 ℃ for 100 h, da ƙarfi riƙe kudi ne 50%, da elongation ne rage ta 5% ~ 10%, da daukan hotuna kudi ne 250 H, ƙarfi riƙe kudi na 45%, m girma kwanciyar hankali a 275 ℃, babu narkewa. , gilashin zafin jiki na 315 ℃, kawai saki kadan cutarwa gas a lokacin da bazuwar.Yana iya gudu ci gaba a 260 ℃ da kuma nan take aiki zafin jiki iya isa 280 ℃.