Fiber Polyimide, oo sidoo kale loo yaqaan fiber P84, waa fibre kuleyl u adkaysta oo leh iska caabin heerkul sare oo heersare ah.At 300 ℃ 100 h, heerka haynta xoogga waa 50%, elongation la dhimay by 5% ~ 10%, iyo heerka gaadhista waa 250 H, heerka haynta xoogga 45%, xasilloonida cabbir heer sare ah at 275 ℃, dhalaalid lahayn , heerkulka galaaska ee 315 ℃, kaliya sii daaya gaas yar oo waxyeelo leh marka uu qudhunto.Waxay si joogto ah u socon kartaa at 260 ℃ iyo heerkulka shaqada ee degdega ah wuxuu gaari karaa 280 ℃.