Ama-fluoropolymers ezohwebo asekelwe ku-TFE, VDF, futhi ngokwezinga elincane i-CTFE.Izibonelo zama-comonomer zifaka i-PMVE, i-PEVE, i-PPVE, i-HFP, i-CTFE, ne-PFBE.Imiphumela evamile yokushintshwa kwe-fluorine esikhundleni se-hydrogen ku-polymer ihlanganisa ukukhushulwa kokumelana kwamakhemikhali ne-solvent, izakhiwo zikagesi ezithuthukisiwe ezifana ne-dielectric engaguquki, i-coefficient ephansi yokungqubuzana, indawo ephakeme yokuncibilika, ukukhuphuka kwe-photostable nokuzinza kwe-thermal, ukumelana nelangabi okuthuthukisiwe, nokwenza buthaka kwemishini. izakhiwo.Izakhiwo zokugcina zitholwa lapho i-polymer i-fluorinated ngokuphelele.
Amasu Okwenza
Ngaphandle kwama-fluoropolymers amabili, i-PVF ne-PTFE, amanye ama-resin achazwe kulesi sahluko angacutshungulwa ngamasu ajwayelekile okuncibilika okufana nomjovo, ukudlulisa nokubumba ukushaywa, ukubunjwa kwe-extrusion nokujikeleza.Imishini yokucubungula yama-fluoropolymers kumele yenziwe ngama-alloys amelana nokugqwala ngenxa yenhlanganisela ebolayo engase ikhiqizwe lapho ama-fluoropolymers eshiselwa ngaphezu kwezindawo zawo zokuncibilika.I-viscosity ephezulu yokuncibilika kwalawa ma-resin ingase idinge impushana eyengeziwe kanye nemishini yokulinganisa ingcindezi ephakeme.
I-PTFE icutshungulwa kusetshenziswa amasu okucubungula impushana yensimbi lapho i-preform ibunjwa futhi "i-sintered."Ukubunjwa kokuminyanisa kungase futhi kusetshenziselwe ukwenza izingxenye ze-PTFE.I-PTFE dispersions isetshenziswa ngamasu afanayo kwezinye izigqoko.Namathisela i-extrusion lapho i-PTFE ihlanganiswa khona ne-hydrocarbon, ngaphambi kokubumba i-preform, isetshenziselwa ukwenza ngokuqhubekayo i-PTFE ibe amashubhu, amateyipu, kanye nokufakwa kwezintambo.I-hydrocarbon ikhishwa umhwamuko ngaphambi kokuba ingxenye ifakwe emanzini.
I-PVF ihlakazeka ku-polar latent solvent efana ne-dimethyl acetamide futhi iyancibilika njenge-plastisol, ilandelwa ukususwa kwe-solvent ngokomiswa.
Izinhlelo zokusebenza
Izakhiwo ze-fluoropolymers eziye zaholela ekusetshenzisweni zihlanganisa ukumelana kwamakhemikhali, ukuzinza kokushisa, izakhiwo ze-cryogenic, i-coefficient ephansi ye-friction, amandla angaphansi komhlaba, i-dielectric constant, ivolumu ephezulu kanye nokumelana nokumelana nomlilo.Ama-fluoropolymers asetshenziswa njengama-liners (process surface) ngenxa yokumelana kwawo nokuhlaselwa kwamakhemikhali.Zihlinzeka ngokunakekelwa okuhlala isikhathi eside, ukugcinwa okuphansi, nezinye izindlela zokonga esikhundleni sensimbi yangaphandle ukuze zisetshenziswe emazingeni okushisa aphezulu ngaphandle kokwethula ukungcola.Izakhiwo zikagesi zenza ama-fluoropolymers abaluleke kakhulu ezinhlelweni zikagesi nezikagesi njengezivikeli, isb, i-FEP kwezokuxhumana kwedatha.
Emishinini yezimoto neyehhovisi, izakhiwo zemishini zama-fluoropolymers zinenzuzo kumabheringi aphansi-okushayisana nezimpawu ezimelana nokuhlaselwa ama-hydrocarbon nolunye uketshezi.Ekucutshungulweni kokudla, i-Food and Drug Administration egunyazwe amamaki e-fluoropolymer ayimpahla yokwenziwa kwezinto zokusebenza ngenxa yokumelana kwazo nowoyela nezinto zokuhlanza, kanye nezindawo zazo zokulwa nenduku kanye nezindawo zokungqubuzana okuphansi.Ku-houseware, ama-fluoropolymers asetshenziswa njengezingubo ezingaqinile ze-cookware nezindawo zikagesi.Ama-athikili wezokwelapha njengama-patches okuhlinzwa kanye nokuxhunyelelwa kwenhliziyo nemithambo yegazi kuncike ekuzinzeni kwesikhathi eside kwama-fluoropolymers kanye namandla awo aphansi angaphezulu kanye nokumelana namakhemikhali.
Ezikhumulweni zezindiza, izinkundla zemidlalo, nezinye izakhiwo, indwangu yengilazi yefibre ehlanganiswe ne-PTFE yenziwa yafulelwa kanye nezivalekile.I-PTFE inikeza ukumelana okuhle kakhulu nesimo sezulu, okuhlanganisa ukuchayeka emisebeni ye-UV elangeni, ukumelana nelangabi ngokuphepha, namandla aphansi angaphezulu okumelana nenhlabathi, nokuhlanza kalula.
Isikhathi sokuthumela: May-30-2018