Zovala

Zogulitsa zomwe zili pachithunzizi zimapangidwa ndi polytetrafluoru sollene (ptfe) zinthu. PTFF, yomwe imadziwika kuti "yapulasitiki" yomwe ili ndi zabwino zambiri.

Pankhani ya magwiridwe, PTF ali ndi mphamvu kwambiri yamankhwala ndipo imatha kupirira chilombo cha mankhwala onse. Zimathanso kukhalabe okhazikika mu malo amphamvu monga acid ndi alkalis. Kukongoletsa kwake kumakhala kotsika kwambiri, ndikugwiritsa ntchito bwino kwambiri, zomwe zimachepetsa mikangano pakati pa zigawo zikuluzikulu, mphamvu zochepetsetsa mphamvu, komanso moyo wautumiki. Pakadali pano, Ptfe ali ndi kutentha kwambiri komanso kuchepa kwa kutentha kwapamwamba, ndipo amatha kugwira ntchito nthawi zambiri mkati mwa kutentha kwa -10 ℃ mpaka 260 ℃. Kuphatikiza apo, ilinso ndi chisudzo chamagetsi kwambiri.

Pankhani yaukadaulo, malo opangira makina amagwiritsidwa ntchito pokonza. Panthawi yokonza, malo opangira makina amatha kupangidwa kuti azitha kuwononga, kubowola, ndi zochitika zina pazinthu za PTFF. Chifukwa cha mawonekedwe ofewa komanso kuwonongeka kosavuta kwa PTFE, chidwi chiyenera kulipidwa posankha kudula magawo pakukonzekera. Malo opangira makina amatha kukwaniritsa kukonzanso kwa mawonekedwe ovuta ndikumamane ndi zofunikira zosiyanasiyana. Ngakhale PTFF ikukhala yovuta, kugwiritsa ntchito malo opangira makina kumatha kuonetsetsa kuti zinthu zilidi ndi zinthu zina pamlingo wina