PTFE high-themperature lesela (PTFE-coated fiberglass) ke premium filter media bakeng sa maemo a feteletseng: flue gase lerōle ho tlosoa (samente, litšila tse chesoang, liboiler tsa mashala tse fihlang ho 260 ° C), filtration ea mokelikeli o senyang (acids, alkalis, oli), lijo / meriana sterile filtration, le lisebelisoa tse hloekileng tsa HEPA. Sebaka se se nang lithupa se thibela lerōle ho phunya 'me se lumella ho hloekisa habonolo. Membrane-laminated limaraka li fumana likhahla tse tlase haholo.

PTFE lesela la mocheso o phahameng oa mocheso le boloka motlakase o babatsehang ho tloha ho -180°C ho ea ho 260°C: resistivity ea molumo >10¹³ Ω·cm ho 200°C, dielectric kamehla e tsitsitse ho 2.0-2.1. Ka holimo ho 260°C, PTFE ea nolofatsa, e bola ka holimo ho 327°C, e lahleheloa ke ho intša ka ho sa feleng. Ka tlase ho 0 ° C, ho hloekisoa hoa ntlafala empa ho roala ho fetoha ho senyeha. Lula ka har'a 260 ° C bakeng sa ts'ebetso e tšepahalang.

Lisebelisoa tsa ho qeta holim'a metsi tse sebelisoang lesela la fiberglass pele ho roala ha PTFE li bohlokoa bakeng sa ts'ebetso ea ho qetela ea lesela la mocheso o phahameng oa PTFE. Organosilane coupling agents e theha marokho a molek'hule pakeng tsa fiber ea inorganic glass le PTFE ea tlhaho, e matlafatsang matla a peel ho tloha ho <2 N/cm ho isa ho 4-8+ N/cm. Kalafo e nepahetseng e boetse e matlafatsa ho hanyetsa mocheso (260 ° C +), tshebetso ea dielectric, le lik'hemik'hale tse hanyetsanang le lik'hemik'hale. Lesela le sa phekoloeng le lebisa ho delamination, ho phatloha le bophelo bo khutšoanyane ba tšebeletso.

Fiberglass weave pattern - plain, twill, kapa satin - e ama haholo PTFE thepa ea lesela la mocheso o phahameng oa mocheso. Satin weave e fana ka matla a phahameng a ho tabola (2-3x thota) le ho tenyetseha, e loketseng ho kobeha ho matla. Plain weave e fana ka botsitso bo botle ka ho fetesisa le ho khomarela lekhapetla, e loketseng lits'ebetso tse tsitsitseng. Twill e leka-lekanya thepa eohle bakeng sa tšebeliso e akaretsang.

Ho roala ho tšoana ha lesela la PTFE mocheso o phahameng ho khethoa ke lintlha tse 'nè: sebopeho sa ho roala (saese ea boholo ba 0.15-0.35 μm, viscosity, dikahare tse tiileng), mokhoa oa ho roala le oa sintering (ho roala ka lehare ho khethoa bakeng sa ho lumellana), boleng ba substrate (paterone ea weave, pele ho phekolo), le tikoloho ea tlhahiso (20-25% R <60%). Dip + blade e kopantseng ts'ebetso e leka-lekanya ho kenella le ho boreleli holimo.

Ho hloekisa le tlhokomelo e nepahetseng ho lelefatsa bophelo ba lesela la mocheso o phahameng oa PTFE. Hloekisa ka mor'a ho sebelisoa le ka mor'a ho pholile. Sebelisa borashe bo bonolo, li-detergents tse sa jeleng paate, kapa joala bakeng sa litšila. Le ka mohla u se ke ua sebelisa li-acid tse matla/alkalis, bleach, kapa metal scrapers. Ho tlotsa oli ea silicone khafetsa ho fokotsa ho roala. Latela litataiso tsena ho thibela tšenyo ea lira.

PTFE lesela la mocheso o phahameng oa mocheso le lesela la silicone ka bobeli li sebelisa lesela la fiberglass e le motheo empa li fapane ka thepa ea ho roala (PTFE resin vs silicone rabara). PTFE e ipabola tabeng ya ho se thure, ho se mamelle, le ho hanyetsa dikhemikhale ho fihla ho 260°C. Lesela la silicone le fana ka maemo a holimo, ho kenya motlakase, le ho hanyetsa mollo (ho fihlela ho 230 ° C). Khetha ho latela lintho tse tlang pele bophelong ba hau.

Lesela la PTFE la mocheso o phahameng le fana ka khanyetso e ikhethang ea lik'hemik'hale, le mamella li-acid tse matla, alkalis, solvents organic, le likhase tse senyang. Sengoliloeng sena se qaqisa lintho tsa sona tse hanyetsanang, mefokolo (metaele ea alkali e qhibilihisitsoeng, lisebelisoa tse matla tsa fluorinating), le lintlha tsa bohlokoa joalo ka mocheso, khatello ea maikutlo le khatello ea maikutlo.

PTFE impregnation ha e felle feela ho fiberglass lesela. Sengoliloeng sena se hlahisa li-substrates tse 7 tse ling - aramid, carbon fiber, PBI, porous metal, graphite, asbestos (phased out), le li-filler tsa ceramic - ka likarolo tsa bona tsa ts'ebetso, melemo, mefokolo, le lits'ebetso tsa bohlokoa.

Sengoliloeng sena se hlalosa hore na ke hobane'ng ha lesela la fiberglass e se nang alkali e le eona substrate e ratoang bakeng sa lesela la mocheso o phahameng oa PTFE. E akaretsa maqhama a lik'hemik'hale ka li-silane coupling agents le thepa ea bohlokoa ea 'mele joalo ka botsitso ba mocheso, botsitso ba sebopeho, le ho hanyetsa kutu - ho netefatsa ts'ebetso e tšoarellang halelele libakeng tse thata.