PTFE (polytetrafluoroethylene)le polyester (joalo ka PET, PBT, jj.) ke thepa e 'meli e fapaneng ka ho feletseng ea polymer. Li na le liphapang tse kholo sebopehong sa lik'hemik'hale, litšobotsi tsa ts'ebetso le masimo a ts'ebeliso. Papiso e qaqileng ke ena:
1. Sebopeho sa lik'hemik'hale le sebopeho
PTFE (polytetrafluoroethylene)
●Sebopeho: E entsoe ka ketane ea athomo ea khabone le athomo ea fluorine e tletseng metsi (-CF)₂-CF₂-), 'me ke fluoropolymer.
●Likarolo: Tlamo e matla haholo ea carbon-fluorine e e fa ho se sebetse hantle ha lik'hemik'hale le ho hanyetsa boemo ba leholimo.
Poliester
●Sebopeho: Ketane e ka sehloohong e na le sehlopha sa ester (-COO-), joalo ka PET (polyethylene terephthalate) le PBT (polybutylene terephthalate).
●Likarolo: Tlamo ea ester e e fa matla a matle a mechini le bokhoni ba ho e sebetsana, empa botsitso ba eona ba lik'hemik'hale bo tlase ho feta ba PTFE.
2. Papiso ea ts'ebetso
| Litšobotsi | PTFE | Polyester (joalo ka PET) |
| Ho hanyetsa mocheso | - Mocheso oa tšebeliso o tsoelang pele: -200°C ho isa ho 260°C | - PET: -40°C ho isa ho 70°C (nako e telele) |
| Botsitso ba lik'hemik'hale | E hanela hoo e ka bang li-acid tsohle, li-alkali le li-solvent ("morena oa polasetiki") | E hanela li-acid le li-alkali tse fokolang, e bola habonolo ke li-acid le li-alkali tse matla |
| Koefficient ea khohlano | E tlase haholo (0.04, e itlotsa ka boyona) | E phahameng (e hloka li-additives ho ntlafatsa) |
| Matla a mechini | E tlase, e bonolo ho e kheloha | E phahameng (PET e atisa ho sebelisoa ka har'a likhoele le libotlolo) |
| Thepa ea dielektri | E ntle haholo (thepa ea ho thibela maqhubu a phahameng) | E ntle (empa e na le kutloelo-bohloko mongobong) |
| Bothata ba ho sebetsana | Ho thata ho qhibilihisa mokhoa (o hloka ho siloa) | E ka entoa le ho ntšoa (ho bonolo ho e sebetsana) |
Masimo a kopo
PTFE: e sebelisoa haholo lifofaneng, lisebelisoa tsa elektroniki, indastering ea lik'hemik'hale, ts'ebetsong ea lijo, mafapheng a bongaka le a mang, hangata e sebelisetsoa ho etsa litiiso, li-bearing, liphahlo, lisebelisoa tsa ho thibela mocheso, jj.
Polyester: e sebelisoa haholo-holo likhoeleng tsa masela, libotlolong tsa polasetiki, lifiliming, polasetiking ea boenjiniere le masimong a mang
Maikutlo a Fosahetseng a Tloaelehileng
Seaparo se sa khomareleng: PTFE (Teflon) e atisa ho sebelisoa ka lipane tse sa khomareleng, athe polyester e sitoa ho mamella ho pheha ka mocheso o phahameng.
Tšimo ea faeba: Lifaeba tsa polyester (tse kang polyester) ke thepa ea mantlha ea liaparo, leLifaeba tsa PTFEli sebelisoa feela bakeng sa merero e khethehileng (joalo ka liaparo tse sireletsang lik'hemik'hale)
PTFE e sebelisoa joang indastering ea lijo?
PTFE (polytetrafluoroethylene) e na le mefuta e mengata ea lits'ebetso indastering ea lijo, haholo-holo ka lebaka la botsitso ba eona bo botle ba lik'hemik'hale, ho hanyetsa mocheso o phahameng, ho se khomarele le coefficient e tlase ea khohlano. Tse latelang ke lits'ebetso tse ka sehloohong tsa PTFE indastering ea lijo:
1. Ho koahela lisebelisoa tsa ho lokisa lijo
Sekoahelo sa PTFE se sebelisoa haholo kalafong ea lesela le holim'a lisebelisoa tsa ho lokisa lijo. Ho se khomarele ha sona ho ka thibela lijo ho khomarela holim'a lisebelisoa nakong ea ts'ebetso, ka hona ho nolofatsa ts'ebetso ea ho hloekisa le ho ntlafatsa katleho ea tlhahiso. Mohlala, lisebelisoa tse kang lionto, li-steamer le li-blender, sekoahelo sa PTFE se ka netefatsa hore lijo ha li khomarele nakong ea ts'ebetso ea mocheso o phahameng ha li ntse li boloka botšepehi le boleng ba lijo.
2. Mabanta a conveyor le mabanta a conveyor
Mabanta a tsamaisang thepa a koahetsoeng ka PTFE le mabanta a tsamaisang thepa hangata a sebelisoa ts'ebetsong ea lijo tse hlahisoang ka bongata, joalo ka ho pheha le ho tsamaisa mahe, bacon, lisoseje, khoho le li-hamburger. Khokahano e tlase le ho hanyetsa mocheso o phahameng oa thepa ena ho e nolofalletsa ho sebetsa ka botsitso libakeng tse nang le mocheso o phahameng ntle le ho baka tšilafalo lijong.
3. Liphaephe tsa maemo a lijo
Liphaephe tsa PTFE li sebelisoa haholo bakeng sa ho tsamaisa lijo le lino, ho kenyeletsoa veine, biri, lihlahisoa tsa lebese, sirapo le linoko. Ho se sebetse hantle ha eona ka lik'hemik'hale ho netefatsa hore ha e ame boleng ba lihlahisoa tse fetisoang mochesong oa -60.°C ho isa ho 260°C, 'me ha e hlahise' mala, tatso kapa monko ofe kapa ofe. Ho phaella moo, liphaephe tsa PTFE li fihlela litekanyetso tsa FDA ho netefatsa polokeho ea lijo.
4. Litiiso le li-gasket
Litiiso le li-gasket tsa PTFE li sebelisoa lihokelong tsa liphaephe, li-valve le li-paddle tsa ho hlohlelletsa tsa lisebelisoa tsa ho sebetsana le lijo. Li ka hanela ho bola ho tsoa lik'hemik'haleng tse fapaneng ha li ntse li lula li tsitsitse libakeng tse nang le mocheso o phahameng. Litiiso tsena li ka thibela lijo hore li se ke tsa silafala nakong ea ts'ebetso ha li ntse li nolofatsa ho hloekisa le ho hlokomela lisebelisoa.
5. Lisebelisoa tsa ho paka lijo
PTFE e boetse e sebelisoa thepa ea ho paka lijo, joalo ka liphahlo tse sa khomareleng paneng, liphahlo tsa pampiri ea ho baka, jj. Lisebelisoa tsena li etsa bonnete ba hore lijo ha li khomarele nakong ea ho paka le ho pheha, ha ka nako e ts'oanang li boloka bohloeki le polokeho ea lijo.
6. Lisebelisoa tse ling
PTFE e ka boela ea sebelisoa likereng, li-bearing bushings le likarolo tsa polasetiki tsa boenjiniere ts'ebetsong ea lijo, e leng se ka ntlafatsang khanyetso ea ho tsofala le khanyetso ea mafome ea lisebelisoa ha ka nako e ts'oanang ho fokotsa litšenyehelo tsa tlhokomelo.
Lintho tse lokelang ho nahanoa ka polokeho
Leha PTFE e na le thepa e mengata e babatsehang, o ntse o hloka ho ela hloko polokeho ea eona ha o e sebelisa indastering ea lijo. PTFE e ka 'na ea lokolla likhase tse kotsi tse fokolang mochesong o phahameng, kahoo hoa hlokahala ho laola mocheso oa tšebeliso le ho qoba ho futhumatsa mocheso o phahameng ka nako e telele. Ho phaella moo, ho bohlokoa ho khetha thepa ea PTFE e fihlelang litlhoko tsa molao tse amehang.
Nako ea poso: Hlakubele-26-2025