I-PCTFE noma i-CTFE (ekuqaleni eyayaziwa ngokuthi i-Kel-F*) inezinto eziningi ezifana nezinye ze-fluoropolymer ezifana ne-PTFE, FEP noma i-PFA, kodwa ingaphezu komshini ngokuqina (ayigugi kalula), futhi ikwazi ukungena kancane kakhulu igesi .
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I-PCTFE noma i-CTFE (ekuqaleni eyayaziwa ngokuthi i-Kel-F*) inezinto eziningi ezifana nezinye ze-fluoropolymer ezifana ne-PTFE, FEP noma i-PFA, kodwa ingaphezu komshini ngokuqina (ayigugi kalula), futhi ikwazi ukungena kancane kakhulu igesi .Ukuzinza kwayo kobukhulu kuyenza ithandeke ukuthi isetshenziswe njengengxenye yesakhiwo lapho izinga lokushisa eliphezulu nokumelana namakhemikhali kwama-fluoropolymers kudingeka.I-PCTFE ibonisa amandla acindezelayo aphezulu kanye nokuguqulwa okuphansi ngaphansi komthwalo.Kodwa-ke, izindleko zayo ezilinganiselwe zingenye yezinto ezicatshangelwayo ezinkulu ekukhethweni kwayo, njengoba kubiza kakhulu.
Imboni Yensimbi kanye Nemboni Yokucubungula Amakhemikhali ibisebenzisa imikhiqizo yamashubhu e-fluoropolymer evela ezintweni ezifana ne-PTFE namapayipi iminyaka eminingi ukuze kudluliswe amakhemikhali adala kakhulu noma abolayo.Ngokuqhubekayo, ishubhu ye-PTFE ithatha isikhundla sekhabhoni nokunye ukubhobhoza kwensimbi okuwohlokayo ngokushesha.Manje nasesikhathini esizayo, i-PTFE izoqhubeka nokusebenzela imboni ngezicelo ezibalulekile.
Izimfanelo ezishisayo ze-PTFE:
Amashubhu e-PTFE angakwazi ukumelana namazinga okushisa afika ku-680 °F isikhathi esilinganiselwe.* Ngaphansi kwezimo ze-cryogenic, i-PTFE ihlala iqinile kuze kube -320 °F.
*Ngaphezu kuka-500 °F, izakhiwo eziwumshini ziba isici esikhawulelayo
Izimfanelo zikagesi ze-PTFE:
Ishubhu ye-PTFE inezinto zikagesi ezinhle kakhulu, eziboniswa ukungaguquguquki kwe-dielectric okuphansi okungu-2.1 phakathi -40 °F no-480 °F phakathi kwebanga lefrikhwensi lika-5 Hz kuya ku-10 GHz.
Ishubhu ye-PTFE iphinde ibe isivikelo esingcono kakhulu esinokumelana nendawo okungaphezulu kuka-3.6 X 1012 ohms (ngisho naku-100% umswakama ohlobene).
Amandla e-dielectric esikhathi esifushane asukela ku-500 volts/mil (1 mil = 10-3 in) ogqinsi olungaphezu kuka-100 mils ukuya ku-4000 volts/mil kumafilimu azacile kakhulu.
Umehluko kusuka ku-PTFE
I-PCTFE iyi-homopolymer ye-chlorotrifluoroethylene (CTFE), kanti i-PTFE iyi-homopolymer ye-tetrafluoroethylene.Ama-monomers angaphambili ahluka kulawo akamuva ngokwesakhiwo ngokuba ne-athomu ye-chlorine ethatha indawo ye-athomu eyodwa ye-fluorine.Ngakho-ke iyunithi ngayinye ephindayo ye-PCTFE ine-athomu ye-chlorine esikhundleni se-athomu ye-fluorine.Lokhu kubala ukuthi i-PCTFE ibe nokuguquguquka okuncane kweketango futhi yingakho izinga lokushisa lengilazi eliphakeme kakhulu.I-PTFE inephuzu lokuncibilika eliphezulu futhi icwebezela kakhulu kune-PCTFE, kodwa eyakamuva inamandla futhi iqinile.Yize i-PCTFE inokumelana namakhemikhali okuhle kakhulu, isengaphansi kwalokho kwe-PTFE.I-PCTFE ine-viscosity ephansi, amandla aqinile aphezulu kanye nokumelana nokukhuphuka kune-PTFE.
I-PCTFE iyabumbeka futhi iyakhipheka kuyilapho i-PTFE ingenjalo.
Ngakho-ke, ngingasho ukuthi kuncike ekusetshenzisweni kwe-valve.Ingabe unayo imikhawulo yezinga lokushisa/ingcindezi?Ikuyiphi isevisi yoketshezi/umhwamuko?Kubonakala sengathi kuzoba KULUNGILE ngobuningi bezinhlelo zokusebenza lapho kusetshenziswa i-PTFE, kodwa kufanele kube okucacile, izinhlelo zokusebenza ezisetshenziswayo lapho i-PTFE idingeka kune-PCTFE.
I-PTFE = i-polymerPCTFE = Kel-F
Zombili zilungele ukusetshenziswa ezihlalweni ze-valve yebhola.Umehluko omkhulu ukuthi i-PCTFE inzima futhi inokungqubuzana okuphezulu.Umthelela wazo zombili izici ukuthi kuvame ukudinga i-torque eyengeziwe ukuvula i-valve futhi ivalwe
PS: Xhumana nathi nge-PTFE imikhiqizo eqediwe isampula yamahhala
Isikhathi sokuthumela: Sep-17-2017