PTFE, yomwe imadziwika bwino kuti polima, ndi polima yomwe yakhala yofunika kwambiri m'zaka za m'ma 2000.Coefficient yake yotsika ya kukangana ndi inertness imapangitsa kuti ikhale yoyenera osati ziwiya zophikira, komanso zisindikizo m'ma valve a mafakitale.Komabe, zinthuzo zimawonetsa zinthu zosafunikira zamakina, monga kupumula kupsinjika (mwachitsanzo, kutaya kuuma ndi nthawi) komanso kudalira kutentha, zomwe zingayambitse zovuta pazinthu zina.
Ntchito imodzi yomwe PTFE yatsimikizira kuti ndi yothandiza pazinthu zina ili mu zidindo zomwe zimagwiritsidwa ntchito mu mavavu a pulagi mafakitale.Ma valve opangira ma Industrial plug amagwiritsidwa ntchito kunyamula madzi osiyanasiyana, ndipo chifukwa chake amakumana ndi zovuta, monga kuukira kwa mankhwala ndi kutentha kokwera.Zisindikizo ziyenera kukwaniritsa zofunikira za kukana kwa mankhwala, ndikupewa kutayikira nthawi zonse.Chikhumbo chochepetsera mtengo wopanga ndikuwongolera magwiridwe antchito kwadzetsa kufunikira kwa zisindikizo zocheperako, zokhala ndi zofunikira zambiri pazinthuzo.Kumvetsetsa bwino momwe kupanikizika mkati mwa chisindikizo kumagawidwira ndikofunikira.Komanso, chodabwitsa cha kumasuka kwa kupsinjika maganizo ndi kudalira kutentha ndizosangalatsa ndipo ziyenera kuganiziridwanso, kulosera za khalidwe la chisindikizo.
PTFE ndi chinthu cholamulira chomwe chimagwiritsidwa ntchito kusindikiza madzi mkati komanso mumlengalenga.Kusindikiza kwamkati kumaperekedwa ndiChithunzi cha PTFEyomwe imapanikizidwa pakati pa thupi ndi pulagi, pomwe kusindikiza kwakunja kumatsimikiziridwa ndi chisindikizo chapamwamba cha PTFE.
PTFE ndi polima yopezeka mu 1938 ndi Roy Plunkett wa DuPont Company.Kapangidwe kake kake kamakhala ndi maunyolo a maatomu a kaboni olumikizidwa palimodzi, okhala ndi nthambi za maatomu a fluorine.Zinthuzi nthawi zambiri zimatchedwa polytetrafluoroethylene (PTFE), pomwe polima ndi chizindikiro cholembetsedwa ndi Kampani ya DuPont.
PTFE yakhala chinthu chofunikira chaukadaulo.Ubwino wake waukulu ndi mawonekedwe ake osamata, kusakhazikika, kukana kuukira kwamankhwala komanso mphamvu yayikulu.Kuphatikiza apo, mawonekedwe enaake amatha kukulitsidwa powonjezera zopangira zodzaza kapena kusintha njira yopangira.Zoyipa zina zakuthupi zomwe PTFE zimakumana nazo ndizokhudzidwa kwambiri ndi kusintha kwa kutentha komanso kusakanizidwa ndi kukwawa komanso kupumula kupsinjika.Mkhalidwe wovuta komanso wopanda mzere wamtunduwu umapereka ntchito yovuta kwa mainjiniya aliyense amene akufuna kulosera za PTFE.
Wina drawback kuti PTFE akuvutika ndi mkulu kusungunuka mamasukidwe akayendedwe ake kumapangitsa jekeseni ndi kuwomba akamaumba zosatheka, kusiya okwera mtengo kupanga njira, monga sintering ndi extrusion, kusankha yekha mbali kupanga.
Nthawi yotumiza: Dec-30-2017