Nekuwedzera kutarisisa kwekuchengetedza moto uye kuziva kuchengetedza kwezvakatipoteredza, murazvo-retardant rayon fibers (viscose fibers) abuda, kunyanya mumaindasitiri ezvemachira nembatya. Kushandiswa kwemarayoni-retardant rayon fibers kuri kuramba kuchipararira. Haikwanise kungovandudza kuchengetedzwa kwemaitiro ezvigadzirwa, asiwo kusangana nekunyaradza zvinodiwa nevatengi. Izvo zvinodzosa moto zveFR rayon fibers zvinonyanya kukamurwa kuita silicon uye phosphorus series. Silicon yakatevedzana flame retardants inowana murazvo udzorere mhedzisiro nekuwedzera siloxane kune rayon fibers kugadzira silicate makristasi. Zvakanakira kushamwaridzana kwezvakatipoteredza, kwete chepfu, uye kunaka kwekudzivirira kupisa, izvo zvinowanzoshandiswa muzvigadzirwa zvepamusoro zvekudzivirira. Phosphorus based flame retardants inoshandiswa kudzvanyirira kupararira kwemurazvo nekuwedzera phosphorus based organic compounds kune rayon fibers uye kushandisa oxidation reaction yephosphorus. Ivo vane mabhenefiti emutengo wakaderera, kushanda nesimba kwemoto, uye hushamwari hwezvakatipoteredza, uye anowanzo shandiswa mukugadzira machira asiri akarukwa.