ʻO ka polyimide fiber, ʻike ʻia hoʻi ʻo P84 fiber, he fiber pale wela me ke kūpaʻa wela kiʻekiʻe.Ma 300 ℃ no 100 mau hola, ʻo 50% ka ikaika o ka hoʻopaʻa ʻana, hoʻemi ʻia ka elongation e 5% ~ 10%, a ʻo ka hoʻolaha ʻana he 250 H, ikaika paʻa ʻana o 45%, kūpaʻa maikaʻi loa ma 275 ℃, ʻaʻohe hoʻoheheʻe. , aniani wela o 315 ℃, hoʻokuʻu wale i kahi kinoea ʻino i ka wā decomposition.Hiki iā ia ke holo mau ma 260 ℃ a hiki i ka mahana hana koke ke hiki i 280 ℃.