Amapangidwa pogwiritsa ntchito ulusi wopitilira-filament polyester fibers ndi anti static fibres, amasinthidwa kukhala nsalu ya semiconductive, yabwino kuti azigwira ntchito m'ma laboratories kapena m'ma workshop pomwe zida zodziwika bwino zimagwiridwa: ma laboratories amagetsi ndi ma microelectronics, ma laboratories amankhwala, malo opangira magetsi, zipinda zoyera, kupaka utoto, magalimoto, etc.
Chomwe chimapangitsa banja la nsalu iyi kukhala lapadera ndikumanga ulusi, womwe m'malo mokhala monofilaments, umapangidwa pogwiritsa ntchito multifilament version.Zomwe izi zimachita ndikufanizira kumva kwa thonje ndikulimbikitsa kupuma kwa nsalu, ndipo chifukwa chake, chitonthozo.
Chigoba chofewa ichi chokhala ndi mphamvu yoletsa moto komanso anti-static.Zinthu zowala zimakhala ndi nsalu yakunja yopanda madzi, yopanda mphepo ndipo imapereka chitetezo chabwino chozizira.Chofewacho chimakhala ndi thumba limodzi lachifuwa, matumba awiri oyika pambali, thumba limodzi lamkati ndi lupu la baji, ndipo lamalizidwa ndi zingwe zowunikira za FR.Manja amatha kuchepetsedwa ndi kukhudza ndi kutseka kwapafupi ndipo ngati mutentha kwambiri, mukhoza kuwachotsa.
