Fluorinated ethylene propylene kapa FEP ke copolymer ea hexafluoropropylene le tetrafluoroethylene.E fapane le li-resin tsa PTFE (polytetrafluoroethylene) ka hore e ka qhibiliha ka ho sebelisa mekhoa e tloaelehileng ea ente le mekhoa ea extrusion ea screw.Fluorinated ethylene propylene e qapiloe ke DuPont 'me e rekisoa tlas'a lebitso la lebitso la polymer FEP.Mabitso a mang ke Neoflon FEP ho tsoa Daikin kapa Dyneon FEP ho tsoa Dyneon/3M.
FEP e tšoana haholo ka sebopeho ho fluoropolymers PTFE (polytetrafluoroethylene) le PFA (perfluoroalkoxy polymer resin).FEP le PFA ka bobeli li arolelana lintho tse molemo tsa PTFE tsa khohlano e tlase le ho se sebetse hape, empa li ka etsoa habonolo.FEP e bonolo ho feta PTFE mme e qhibiliha ho 260 °C;e pepenene haholo ebile e hanana le khanya ea letsatsi.
FEP e hlahisoa ke polymerization ea mahala-radical ea metsoako ea tetrafluoroethylene le hexafluoropropylene.Motsoako o leeme ho lefella reactivity e batlang e le tlase ea karolo ea propylene.Ts'ebetso ena hangata e qalisoa ka peroxydisulfate, e homolyzes ho hlahisa li-radicals tsa sulfate.Hobane FEP ha e qhibilihe hantle hoo e batlang e le lihlapolli tsohle, polymerization e etsoa joalo ka emulsion ka metsing, hangata e sebelisa sesebelisoa se kang PFOS.Polymer e na le hoo e ka bang 5% ea karolo ea propylene.
Litafole tse sebetsang tsa papiso ea PTFE khahlano le FEP, PFA le ETFE li ka fumanoa webosaeteng ea DuPont, li thathamisa thepa ea mochini, e futhumatsang, ea lik'hemik'hale, ea motlakase le ea mouoane ea e 'ngoe le e 'ngoe.
Mabapi le ho hanyetsa kutu, FEP ke eona feela fluoropolymer e fumanehang habonolo e ka ts'oanang le khanyetso ea PTFE ho li-caustic agents, kaha ke sebopeho se hloekileng sa carbon-fluorine le fluorinated ka ho feletseng.
Ka mocheso, FEP e hlahella ho PTFE le PFA ka ho ba le ntlha e qhibilihang ea 260 ° C (500 ° F), hoo e ka bang likhato tse mashome a mane ka tlase ho PFA le ho theoha hape ho feta PTFE.
Ka motlakase, PTFE, FEP le PFA li na le likarolo tse tšoanang tsa dielectric, empa matla a dielectric a FEP a fetisoa feela ke PFA.Leha ho le joalo, le hoja PFA e na le ntho e tšoanang le ea PTFE, phepelo ea FEP e pota-potile makhetlo a tšeletseng a PFA le EFTE (e leng se etsang hore e be mokhanni ea sa tsitsang oa masimo a motlakase).
Ka boqhetseke, FEP e tenyetseha hanyane ho feta PTFE.Mohlomong hoa makatsa hore ebe ha e mamelle ho mena ka makhetlo a mangata hammoho le PTFE.E boetse e na le coefficient e phahameng ea khohlano e matla, e bonolo ebile e na le matla a tlase hanyane ho feta PTFE le PFA.
Ntho e hlokomelehang ea FEP ke hore e phahametse PTFE lits'ebetsong tse ling tse amanang le ho pepesetsoa lihlapa.
Ethylene tetrafluoroethylene (ETFE), ka litsela tse ngata, e ka nkoa e le ea sehlopha se fapaneng, kaha ha e le hantle ke mofuta o phahameng oa boenjiniere oa matla a mang a nang le lintho tse ka nkoang e le thepa e fokotsehileng hanyenyane libakeng tse ling ha e bapisoa le PTFE, FEP le PFA.
Nako ea poso: Apr-30-2018