Ka lilemo tse fetang mashome a tšeletseng Polytetrafluoroethylene (PTFE, mabitso a marang-rang: Tarflen, polymer, Fluon) e ntse e tsejoa le ho tsejoa ka thepa ea eona e ikhethang.E sebelisoa haholo makaleng 'ohle a indasteri, ho akarelletsa le tlhahiso ea tenyetsehanghoseea kaho le ts'ebeliso e fapaneng.
PTFE thepa e ikhethang:
- Ho hanyetsa lik'hemik'hale tse babatsehang.Ha e qhibilihe kapa hona ho kokomoha nthong leha e le efe ea lihlapolli tse tsebahalang.E hanyetsana le li-acids le li-bases tse matla haholo.Ke lintho tse fokolang feela, tse sa tloaelehang haholo (fluorine, tšepe ea alkali e belang, oksijene bifluoride, chlorine trifluoride) e ka ama PTFE.- Mefuta e mengata ea ho hanyetsa mocheso.PTFE e lula e feto-fetoha le mocheso oa helium ea metsi (-269 ° C) . Crystalline melting point of PTFE is +327°C, and at +415°C decomposition of PTFE etsahala.Mocheso o sebetsang oa li-hoses tse entsoeng ka PTFE hangata o tloha ho -70 ° C ho ea ho +260 ° C ho itšetlehile ka moralo oa hose (khatello le mekhoa ea mechine ea PTFE e qala ho fokotseha ha mocheso o phahama ka holimo ho +130 ° C) - Ho hanyetsa botsofali. le maemo a leholimo.PTFE ke hydrophobic, e hanyetsanang ka botlalo le ozone, oksijene, leseli le mahlaseli a UV.Mehlala e pepesehetseng lilemo tse 'maloa ho maemo a leholimo a fapaneng ha e so bonts'e liphetoho ho thepa ea PTFE.- PTFE e na le coefficient e tlase haholo ea likhohlano (ho tloha ho 0.02 ho isa ho 0.2) le boleng bo tlase ba matla a holim'a metsi.Ka hona li-hoses tse entsoeng ka PTFE li na le mekhoa ea ho itlhoekisa (lintho ha li khomarele marako a hose) kahoo ho fetisoa ho na le bohloeki haholo.- Lintho tse ntle tsa motlakase, tse phahameng tsa resistivity.- Lintho tse itimang ka ho itima lijo.- Ho hanyetsa ka mokhoa o itekanetseng ho senya.
Lisebelisoa tse ling tse tšoanang le PTFE
Li-Hose li ka etsoa eseng feela ho tsoa ho PTFE empa hape le ho tsoa ho li-copolymers tsa PTFE.Hangata li na le lik'hemik'hale tse phahameng le ho hanyetsa mocheso empa lisebelisoa tse ling li fapane hanyenyane ha li bapisoa le PTFE (ho hanyetsa mechine e ntle, litšoaneleho tse molemo tsa ho sebetsa):
- FEP (polymer FEP, DuPont),- PFA, MFA (polymer PFA, DuPont),- ETFE (Tefzel, DuPont),- ECTFE (Halar).
Tlhahiso le kaho ea li-hoses tsa PTFE
Ka lebaka la viscosity e phahameng esita le mocheso o haufi le ho bola ha mocheso (+415°C),Lithapo tsa PTFEli etsoa ka extruding motsoako oa lubricant (parafine oli) le PTFE phofo.
Mefuta ea kaho ea hose ea PTFE:
- Li-hoses tse boreleli le tsa masenke tse se nang masela.E sebelisoa bakeng sa lits'ebetso tsa khatello e tlase.Translucent, lerako la PTFE le lumella taolo ea pono ea phallo.- Li-hose tse boreleli tse nang le sekoahelo se le seng kapa tse peli tsa kantle tse entsoeng ka tšepe e sa hloekang.E sebelisoa haholo hoo e batlang e le mecha eohle ea litaba: lik'hemik'hale, likhase, mouoane, oli, mafura, mafura, pente, li-adhesives, lijo makaleng 'ohle a indasteri.Motsoako oa khatello e batlang e phahame ea ho sebetsa ea li-hoses (ho fihlela ho pota 400 bar) le PTFE thepa e ikhethang e hlahisa tharollo ea bokahohle le e ke keng ea nkeloa sebaka bakeng sa theknoloji ea morao-rao ea indasteri.Ka linako tse ling e matlafatsoa ka helix ea tšepe ea tšepe pakeng tsa PTFE le braid e ka ntle.E entsoe ka mekhoa e sa tšoaneng ea kaho e nang le khatello e tlaase ea ho sebetsa empa e phahame ho feta ho feta li-bore hoses tse boreleli.- Li-hose tse boreleli tse boreleli tse nang le PTFE liner tse extruded tse nang le masela a masela, ts'ebetso ea terata ea tšepe e matlafatsang le lesela le ka ntle le entsoeng ka rabara.Likarolo tsohle li vulcanized 'me li kopantsoe ka ho sa feleng le PTFE lera la ka hare - joalo ka hose e tloaelehileng ea rabara.E sebelisoa haholo indastering ea lik'hemik'hale.
Nako ea poso: Jun-02-2018