PTFE vs PFA

PFA, kapena Perfluoroalkoxy, ndi mtundu wa fluoropolymer.Ili ndi zinthu zofanana kwambiri ndi polytetrafluoroethylene (PTFE), yomwe ndi mtundu wodziwika bwino wa polima.PFA idapangidwa ndi DuPont Co. ndikupatsidwa dzina lapolima PFA.Chomwe chimasiyanitsa ndi utomoni wa PTFE ndikuti PFA imatha kusungunuka.Izi zimatheka pogwiritsa ntchito jekeseni wamba komanso njira za screw extrusion.

Polytetrafluoroethylene (PTFE), ndi fluoropolymer kupanga wa tetrafluoroethylene.DuPont Co ndi wopanga odziwika bwino wa PTFE, yemwe, monga tanena kale, ndi zinthu zomwe anthu ambiri amazidziwa ngati polima.Kumanga kuchokera ku kupezeka kwangozi kwa Roy Plunkett, PTFE ndi mankhwala olemera kwambiri omwe ali ndi carbon ndi fluorine.Kwenikweni, ndi fluorocarbon solid.Ndi hydrophobic, kutanthauza kuti madzi kapena zinthu zomwe zili ndi madzi zimatha kunyowa chifukwa cha chikhalidwe cha fluorocarbon chochepetsa mphamvu zakubalalika kwa London.Choncho, PTFE ali ndi otsika kwambiri coefficient wa kukangana pamene anakumana ndi zolimba.Izi ndichifukwa chakuchuluka kwa electronegativity ya fluorine.Kupatula polima, PTFE imatchedwanso Fluon ndi Syncolon.

olytetrafluoroethylene (PTFE) ndi fluoropolymer kupanga wa tetrafluoroethylene kuti ali zambiri ntchito.

Perfluoroalkoxy alkanes (PFA) ndi copolymer wa hexafluoropropylene ndi perfluoroethers.Imodzi yodziwika bwino PFA kupanga ndi polima PFA.

PFA ili ndi zofanana kwambiri ndi PTFE, ngakhale kusiyana kwakukulu pakati pa PTFE ndi PFA ndikuti PFA imasungunuka.Izi zimatheka pogwiritsa ntchito jekeseni wamba komanso njira za screw extrusion.

PTFE imakonda kugwiritsidwa ntchito ngati zokutira zopanda ndodo za mapoto ndi zinthu zambiri zamakono zophikira.PTFE nthawi zambiri ntchito muli ndi mapaipi posamalira zotakasika ndi zikuwononga mankhwala.Izi ndichifukwa choti ili ndi zinthu zosagwira ntchito.Kugwiritsa ntchito kwina kwa PTFE kuli ngati mafuta.Pogwiritsidwa ntchito motere, PTFE imathandizira kuchepetsa kukangana mkati mwa makina, kuchepetsa "kuwonongeka," ndikuwongolera kugwiritsa ntchito mphamvu.

PFA nthawi zambiri imagwiritsidwa ntchito pazida zamalabu apulasitiki chifukwa chokana kwambiri kuukira kwamankhwala, kuwonekera kwa kuwala, komanso kusinthasintha kwathunthu.PFA imagwiritsidwanso ntchito ngati chubu chogwirira ntchito zovuta kapena zowononga kwambiri.Ntchito zina za PFA zili ngati zomangira zamapepala pazida zamankhwala.Chifukwa cha katundu wake, imatha kuthandizira kugwiritsa ntchito mapulasitiki a carbon steel fiber reinforced (FRPs) m'malo mwa ma aloyi okwera mtengo komanso zitsulo.

Zipangizo zomwe zimagwiritsidwa ntchito poyezera mulingo nthawi zambiri zimakumana ndi matanthwe ovuta.Makanema ankhanza, monga asidi, amatha kuwononga ma probes ndi magawo omwe amalumikizana ndi chinthucho.Zopangira zowoneka bwino komanso zomata ndizovuta zina zoyezera.Izi zitha kupangitsa kuti ziwonjezeke pazigawo zonyowa za transmitter ndikuwonjezera chiopsezo chokhudza muyeso.Ziwalo zonyowa zomwe zidakutidwa ndi PTFE kapena PFA zimapereka kukana kwabwino kuzinthu zowononga ndipo ndi njira yabwino yopewera kuipitsidwa komwe kumachitika chifukwa cha kuchuluka kwazinthu.

Zopangidwa ndi madzi zimatha kuyambitsa kukhazikika kwa tinyanga, komwe kumatha kukhudza muyeso.Chifukwa cha mphamvu ya hydrophobic ya PTFE ndi PFA, kuyeza kwake sikungakhudzidwe ngati madontho amadzi akukwera pazigawo za tinyanga.

PTFE, pokhala cholimba cha fluorocarbon, ndi hydrophobic, kutanthauza kuti sichinyowetsedwa mosavuta ndi zinthu zomwe zili ndi madzi.Komanso, PTFE imakhala ndi mikangano yotsika kwambiri ikakumana ndi zolimba.

PFA ndiyapamwamba kuposa PTFE pankhani yosinthasintha makamaka ikafika pakugwiritsa ntchito machubu.Kumbali ina, moyo wosinthika wa PFA (mwachitsanzo, kuthekera kopirira kupindika mobwerezabwereza) ndi wotsika kuposa PTFE.

PTFE imalimbana ndi kutentha pang'ono kuposa PFA.PFA imakhudzidwa kwambiri ndi kuyamwa kwamadzi ndi nyengo koma ndipamwamba kuposa PTFE ikafika pakukana kupopera mchere.

PFA ili ndi dielectric yofanana ndi PTFE komanso chinthu chofanana kwambiri cha dissipation;komabe PFA ili ndi mphamvu ya dielectric katatu kapena kanayi kuposa PTFE.