Rau cov txheej txheem ntawm cov pa roj carbon fiber ntau, thaum tsim PAN-raws li carbon fiber, polyacrylonitrile fiber, hu ua "niam", yuav tsum xub ua tiav los ntawm polymerization thiab spinning txheej txheem. Cov niam no ces muab tso rau hauv qhov cub oxidation rau oxidation ntawm 200 mus rau 300 degrees Celsius. Tsis tas li ntawd, carbon fiber yog carbonized nyob rau hauv lub cub tawg carbonization ntawm qhov kub ntawm 1, 000 mus rau 2, 000 degrees Celsius. Ntxiv rau cov pa roj carbon fiber ntau, PAN-raws li carbon fiber kuj suav nrog crude fiber, hu ua "tib neeg cab hom carbon fiber", uas yog pheej yig los tsim.