ETFE vs PTFE

Ethylene tetrafluoroethylene (ETFE) ndi pulasitiki yopangidwa ndi fluorine.Linapangidwa kuti likhale ndi kukana kwa dzimbiri komanso mphamvu pa kutentha kwakukulu.ETFE ndi polima ndipo dzina lake lochokera kumagwero ndi poly(ethene-co-tetrafluoroethene).ETFE ili ndi kutentha kwakukulu kosungunuka, mankhwala abwino kwambiri, magetsi ndi mphamvu zotsutsana ndi ma radiation.Akawotchedwa, ETFE imatulutsa hydrofluoric acid.

Matebulo ofananiza othandiza a PTFE motsutsana ndi FEP, PFA ndi ETFE atha kupezeka patsamba la DuPont, ndikulemba mndandanda wamakina, matenthedwe, mankhwala, magetsi, ndi mpweya wamtundu uliwonse, mbali ndi mbali.

ETFE ndi njira yamphamvu kwambiri ya ena atatu omwe ali mu gulu ili, nthawi zambiri amakhala ndi mphamvu zochepa m'madera ena poyerekezera.

Kuwotcha kwa ETFE kumachitika mofanana ndi ma fluoropolymers ena angapo, ponena za kutulutsa hydrofluoric acid (HF).HF ndi yowononga kwambiri komanso yowopsa, choncho kusamala koyenera kuyenera kuchitidwa.

Kanema wa ETFE ndi wodziyeretsa (chifukwa cha malo ake osasunthika) ndikubwezeretsanso.Imakonda kuphulika ndi m'mbali zakuthwa ndipo imagwiritsidwa ntchito kwambiri padenga.Monga filimu yopangira denga, imatha kutambasulidwa (mpaka 3x) ndikukhalabe ngati kusintha kwina kukuchitika (chifukwa cha kuwonjezereka kwa kutentha, mwachitsanzo.) Pogwiritsa ntchito kuwotcherera kutentha, misozi imatha kukonzedwa ndi chigamba kapena mapepala angapo omwe amasonkhanitsidwa. mapanelo akuluakulu.

ETFE ili ndi mphamvu yocheperako ya 42 MPa (6100 psi), yokhala ndi kutentha kwapakati pa 89 K mpaka 423 K (−185 °C mpaka +150 °C kapena −300 °F mpaka +300 °F).[3]

Ma resins a ETFE amalimbana ndi kuwala kwa ultraviolet.Kuyesa kwanyengo kwanthawi yayitali (kofanana ndi kuwonekera kwazaka 30) sikunapangitse kuti filimuyo iwonongeke.