I-PCTFE okanye i-CTFE (ekuqaleni yayisaziwa ngokuba yi-Kel-F*) ineempawu ezininzi ezifana nezinye ii-fluoropolymers ezifana ne-PTFE, i-FEP okanye i-PFA, kodwa iphezulu ngoomatshini ngokungqongqo (ayikhubazeki ngokulula), kwaye inokungena kwerhasi ephantsi kakhulu .
I-PCTFE okanye i-CTFE (ekuqaleni yayisaziwa ngokuba yi-Kel-F*) ineempawu ezininzi ezifana nezinye ii-fluoropolymers ezifana ne-PTFE, i-FEP okanye i-PFA, kodwa iphezulu ngoomatshini ngokungqongqo (ayikhubazeki ngokulula), kwaye inokungena kwerhasi ephantsi kakhulu .Ukuzinza kwayo okulinganayo kwenza kube nomtsalane ukusetyenziswa njengenxalenye yecandelo lesakhiwo apho kufuneka ubushushu obuphezulu kunye nokumelana neekhemikhali ze-fluoropolymers.I-PCTFE ibonisa amandla aphezulu oxinzelelo kunye nokuguqulwa okuphantsi phantsi komthwalo.Nangona kunjalo, iindleko zayo ezihambelanayo yenye yezinto eziphambili zokuqwalaselwa ekukhethweni kwayo, kuba ibiza kakhulu.
UShishino lweNsimbi kunye noShishino lokuLungiswa kwemichiza belusebenzisa iimveliso zetyhubhu ze-fluoropolymer ezivela kwizinto ezifana ne-PTFE kunye nemibhobho iminyaka emininzi yokuhambisa iikhemikhali ezinobungozi kakhulu okanye ezitshabalalisayo.Ngaphezu koko, i-PTFE ityhubhu ithatha indawo yekhabhoni kunye neminye imibhobho yentsimbi ewohlokayo ngokukhawuleza.Ngoku nakwixesha elizayo, i-PTFE iya kuqhubeka nokusebenzela ishishini kwizicelo ezibalulekileyo.
IiMgangatho zoThermo ze-PTFE:
Ityhubhu ye-PTFE inokumelana namaqondo obushushu ukuya kuthi ga kwi-680 °F ixesha elithile eliqingqiweyo.* Phantsi kweemeko ze-cryogenic, i-PTFE ihlala yomelele ukuya kuthi ga kwi -320 °F.
*Ngaphezu kwe-500 °F, iipropathi zoomatshini ziba yinto ethintelayo
IiMgangatho zoMbane ze-PTFE:
Ityhubhu ye-PTFE ineempawu zombane ezigqwesileyo, eziboniswa yi-dielectric ephantsi engaguquguqukiyo ye-2.1 phakathi kwe -40 °F kunye ne-480 °F ngaphakathi koluhlu lwamaza ka-5 Hz ukuya kwi-10 GHz.
Ityhubhu ye-PTFE ikwasisithinteli esigqwesileyo esinokumelana nomphezulu we-3.6 X 1012 ohms (kwanakwi-100% yokufuma okunxulumeneyo).
Ixesha elifutshane amandla e-dielectric avela kwi-500 volts / mil (1 mil = 10-3 in) yobunzima obukhulu kune-100 mils ukuya kwi-4000 volts / mil kwiifilimu ezincinci kakhulu.
Umahluko kwi-PTFE
I-PCTFE yi-homopolymer ye-chlorotrifluoroethylene (CTFE), ngelixa i-PTFE i-homopolymer ye-tetrafluoroethylene.Iimonomers zangaphambili zahlukile kuleyo yamva ngokwesakhiwo ngokuba neathom yeklorini ethatha indawo yenye yeeathom zefluorine.Yiyo loo nto iyunithi nganye ephindayo ye-PCTFE ine-athomu ye-chlorine endaweni ye-athomu ye-fluorine.Oku kubangela ukuba i-PCTFE ibe nokuguquguquka okuncinci kwekhonkco kwaye kungoko iqondo lobushushu obuphezulu beglasi.I-PTFE inendawo yokunyibilika ephezulu kwaye ikristale ngakumbi kunePCTFE, kodwa le yokugqibela yomelele kwaye iqinile.Nangona i-PCTFE inokumelana neekhemikhali okugqwesileyo, isengaphantsi kwaleyo ye-PTFE.I-PCTFE ine-viscosity ephantsi, amandla aphezulu kunye nokuxhathisa ukukhwela kune-PTFE.
I-PCTFE iyabumbeka kwaye iyakhubeka ngelixa i-PTFE ingekho.
Ngoko, ndingathi kuxhomekeke ekusetyenzisweni kwevalve.Ingaba unayo imida yeqondo lokushisa/noxinzelelo?Yeyiphi inkonzo yolwelo/umphunga ekuyo?Kubonakala ngathi kuya kulunga kuninzi lwezicelo apho i-PTFE isetyenziswa khona, kodwa zibopheleleke ukuba zibe zizodwa, izicelo ze-niche apho i-PTFE ifunwa khona kunePCTFE.
PTFE = polymerPCTFE = Kel-F
Zombini zilungele ukusetyenziswa kwizihlalo zevalve yebhola.Umahluko omkhulu yi-PCTFE inzima kwaye inokhuhlane oluphezulu.Impembelelo yazo zombini ezi zinto kukuba ithande ukufuna itorque engaphezulu ukujika ivalve ivuleke kwaye ivalwe
PS: Qhagamshelana nathi PTFE iimveliso ezigqityiweyo isampuli free
Ixesha lokuthumela: Sep-17-2017