Polytetrafluoroethylene (PTFE) ke polymer ea carbon le fluorine. Boitsebiso bona bo na le lebitso le tsebahalang haholo: Teflon.
Thepa ea PTFE e kenyelletsa:
Lintho tse ntle tsa mochini (<1%)
Khemik'hale inertness corrosion resistance
Ho hanyetsa mocheso
Li-coefficients tse tlase tsa khohlano
Lintho tse sa reng letho (tse mamella mocheso o sa khaotseng oa 500°f (260°c))
Apara khanyetso
Boemo bo phahameng ba ho qhibiliha
Thepa e babatsehang ea PTFE e fana ka mefuta e mengata ea lisebelisoa, 'me hangata e sebelisoa e le seaparo se se nang thupa bakeng sa cookware. PTFE e ntle ea ho apara ho hanyetsa e lumella hore e kopanngoe le lisebelisoa tse sa tšoaneng ka emulsion polymerization kapa suspension polymerization processing ho theha lihlahisoa tse phahameng tsa indasteri tse sa keneleng mocheso tse nang le thepa e ntle ea mochine, joalo ka terata, mabanta a tsamaisang lijo, masela a tenyetsehang a sa thupeng, joalo-joalo.
PTFE ke Eng?
Polytetrafluoroethylene e fumanwe ka 1938. E ile ya fumanwa qalong ke setsebi sa khemistri sa Amerika Roy J. Plunkett (1910–1994) ha a ne a leka ho etsa sehatsetsi se setjha sa carbon le fluorine. Batho ka nako eo ba ka be ba sa ka ba nahana ka sehlahisoa sena se tloaelehileng. Li-catalyst tse makatsang li tla ama likarolo tsohle tsa lefats'e.
Ka 1941, DuPont e ile ea fumana tokelo ea molao bakeng sa sehlahisoa sena 'me ea ngolisa letšoao la khoebo tlas'a lebitso la 'Teflon' ka 1944.
Matsatsing ana, polytetrafluoroethylene e sebelisoa haholo mafapheng a mangata a tlhahiso le bophelo. Lefapheng la lijo, PTFE coated cookware e sebelisoa haholo; indastering ea liaparo, liaparo tse phahameng tse sa batang tse tsoang mefuteng e kang HELIKON le Carinthia kaofela li sebelisa PTFE joalo ka lera kapa lesela le kantle. , e le ho finyella bokhoni ba ho mamella serame se matla sa -30 ° C; lebaleng la sesole, lisebelisoa tsa PTFE tse nang le tahlehelo e tlase, thepa e ntle haholo ea dielectric, ho ts'oana hantle, lisebelisoa tsa lik'hemik'hale tse tsitsitseng, 'me hoo e batlang e le ha ho na mongobo oa mongobo o sebelisoang haholo liphanele tse phahameng tsa radio frequency radar. Lefapheng la bongaka, lisebelisoa tsa PTFE li boetse li sebelisoa haholo likarolong tsa 'mele oa maiketsetso.
PTFE E Emela Eng?
PTFE e emetse polytetrafluoroethylene, lentsoe la lik'hemik'hale bakeng sa polymer (C2F4)n.
Boitsebiso bona ka kakaretso bo bua ka mofuta ofe kapa ofe oa ptfe synthetic fluoropolymer. Litšobotsi tse ka sehloohong tsa polytetrafluoroethylene ke tse latelang:
Boholo ba mocheso o sebetsang (°F /°C): 500/260
Matla a Tensile Nakong ea Phomolo (PSI): 4,000
Dielectric constant (kV/mil): 3.7
Karolelano: 2.16
Elongation nakong ea khefu: 350%
Bothata ba Shore D: 54
Ptfe polytetrafluoroethylene synthetic fluoropolymer e sebelisoang haholo e nang le litšobotsi tse ka holimo e se e na le mefuta e mengata, mefuta ea mantlha ke e latelang:
TEFLON®: Chemours
FLUON®: AGC Ltd
DYNEON®: 3M
POLYFLON: Daikin Industrial Co., Ltd.
ALGOFLON: Solvay Ltd.
PTFE Sebopeho sa Lik'hemik'hale
Polytetrafluoroethylene ke linear polymer e entsoeng ka liathomo tsa carbon (C) le fluorine (F), ka foromo ea lik'hemik'hale (C2F4) n, moo n e leng palo ea li-monomer units.
Sebopeho sa PTFE se ka hlalosoa e le: -CF2-CF2-CF2-CF2-
Ketane e telele ea limolek'hule tsa PTFE e entsoe ka liathomo tsa carbon, tseo e 'ngoe le e 'ngoe ea tsona e hokahantsoeng le liathomo tse peli tsa fluorine.
Liathomo tsa Fluorine li batla li koahela bokaholimo ba liathomo tsa khabone tsa ketane ea spiral polymer. Liathomo tsa carbon li theha ketane e kholo ea ketane ea polymer. Liathomo tsa fluorine li etsa sebopeho se kang thebe se pota-potileng liathomo tsa carbon, tse sireletsang hantle liathomo tsa carbon tse ka hare.
Tokiso ena e ikhethang ea liathomo e fa PTFE thepa ea eona e ikhethang. Sebopeho sena sa limolek'hule se kenya letsoho ho PTFE's 'mele le lik'hemik'hale tse ke keng tsa lekanngoa.
Thepa ea Teflon ke Eng?
Teflon ke thermoplastic fluoropolymer, ha Teflon acronym ke PTFE (polytetrafluoroethylene).
Teflon ke lets'oao la Chemours, leha ho le joalo, PTFE le eona e ka rekoa ho lik'hamphani tse ling ntle le Chemours.
Teflon ke thepa e tsebahalang ka lebaka la likhohlano tse tlase, khanyetso ea mocheso o phahameng le khanyetso ea lik'hemik'hale.
Ke Teflon PTFE
Ha e le hantle, Teflon ke thepa ea polymer e entsoeng ka polymerized ho tloha tetrafluoroethylene 'me ke mofuta oa thepa e entsoeng ka perfluorinated. Lebitso la eona la lik'hemik'hale ke polytetrafluoroethylene (PTFE).
Sebopeho sa lik'hemik'hale tsa Teflon se ikhetha haholo. Sebopeho sa limolek'hule ke hore F (athomo ea fluorine) e nkela H (athomo ea hydrogen) kaofela sebakeng sa ketane ea C. Ka nako e ts'oanang, hobane radius ea athomo ea fluorine e kholo haholo ho feta radius ea athomo ea carbon, repulsion pakeng tsa liathomo tse kholo haholo, kahoo e ke ke ea tšoana le liathomo tsa haedrojene, li ka hlophisoa ka sefofane, kahoo liathomo tsa fluorine hoo e ka bang spiral ho fihlela ho thatela liathomo tsa carbon, e le hore lefatše le ka ntle le ka kopana feela le fluorine ka mokhoa o fokolang.
Ka thibelo e matla ea athomo ea fluorine, mohaho oa polymer oa Teflon o batla o tsitsitse ha o bapisoa le lisebelisoa tse ling.
Thepa ea Teflon
PTFE ke polymer e entsoeng ka polymer e tsoang ho tetrafluoroethylene monomer. Ke boka ba bokae bo bonaletsang kapa bo sa bonahaleng bo tšoanang le PE. Boima ba eona ke 2.2g/cm3 mme sekhahla sa eona sa ho monya metsi se ka tlase ho 0.01%.
Sebopeho sa lik'hemik'hale tsa PTFE polymer se tšoana le sa PE, ntle le hore liathomo tsohle tsa hydrogen tse polyethylene li nkeloa sebaka ke liathomo tsa fluorine. Ka lebaka la matla a phahameng a tlamo le ts'ebetso e tsitsitseng ea bond ea CF, e na le khanyetso e ntle ea lik'hemik'hale 'me e khona ho mamella li-acids tsohle tse matla (ho kenyeletsoa aqua regia) ntle le tšepe e qhibilihisitsoeng ea alkali, mecha ea oxidizing, le sodium hydroxide e ka holimo ho 300 ° C. Hammoho le litlamorao tsa li-oxidants tse matla, li-agent tse fokotsang le li-solvents tse fapaneng tsa manyolo.
Athomo ea F ka molek'hule ea PTFE e na le symmetrical, 'me likarolo tse peli tse ho CF bond li hokahane ka kopanelo. Ha ho na li-elektronike tse sa lefelloeng molek'hule, e leng se etsang hore molek'hule eohle e se ke ea nka lehlakore. Ka hona, e na le thepa e ntle ea dielectric, 'me ho kenya motlakase ha eona ha e amehe ke Tšusumetso ea tikoloho le maqhubu.
Teflon Thepa ea 'Mele
Bophahamo ba eona ba ho hanyetsa bo boholo ho feta 1017, tahlehelo ea eona ea dielectric e nyane, matla a eona a ho senyeha a phahame, arc resistance e ntle, 'me e ka sebetsa tikolohong ea motlakase ea 250 ° C. Hobane ha ho na maqhama a hydrogen ka har'a sebopeho sa limolek'hule tsa PTFE, sebopeho se na le symmetrical, kahoo crystallization ea eona Tekanyo ea crystallization e phahame haholo (ka kakaretso crystallinity ke 55% ~ 75%, ka linako tse ling e phahametse 94%), e leng se etsang hore PTFE e se ke ea chesa haholo. Thempereichara ea eona e qhibilihang ke 324C, mocheso oa eona oa ho bola ke 415°C, 'me mocheso oa eona o phahameng oa tšebeliso ke 250°C. E brittle Mocheso ke -190 ° C, 'me mocheso o sothang mocheso (tlasa maemo a 0.46MPa) ke 120C.
Lisebelisoa tsa Teflon li na le thepa e ntle ea mochini. Matla a eona a thata ke 21 ~ 28MPa, matla a ho kobeha ke 11 ~ 14MPa, bolelele ke 250% ~ 300%, 'me li-coefficients tsa eona tse matla le tse tsitsitseng khahlanong le tšepe ke 0.04, e molemo ho feta nylon, polyformaldehyde, le polyethylene. Coefficient ea khohlano ea li-plastiki tse pholileng e nyenyane.
PTFE e hloekileng e na le matla a tlase, ho se mamelle ho se sebetse hantle le khanyetso e mpe ea creep. Hangata hoa hlokahala ho eketsa likaroloana tse ling tsa PTFE polymer, tse kang graphite, sehlopha sa disulfide, aluminium oxide, khalase ea fiber, carbon fiber, joalo-joalo ho ntlafatsa thepa ea eona ea mechine. , 'me e ka boela ea atolosoa ka ho sebelisana le li-polymers tse ling tse kang polyphenylase (PHB), polyphenylene sulfide (PFS), polyethylene glycol (PEEK), polyethylene / propylene copolymer (PFEP), joalo-joalo mocheso oa eona o fokolang mocheso, ho ntlafatsa ho hanyetsa ha eona ho feto-fetoha.
Teflon e Etsoa Joang?
Ts'ebetso ea tlhahiso e sebelisa chloroform e le lisebelisoa tse tala, e sebelisa anhydrous hydrofluoric acid ho fluorinate chloroform, mocheso oa karabelo o ka holimo ho 65ºC, o sebelisa antimony pentachloride e le ntho e thusang, 'me qetellong e sebelisa ho phunyeha ha mocheso ho hlahisa tetrafluoroethylene.
Aokai e hlahisoa ka ho fanyeha polymerization kapa emulsion polymerization.
Tokisetso ea monomer tetrafluoroethylene
Ka indasteri, chloroform e sebelisoa e le lisebelisoa tse tala, anhydrous hydrofluoric acid e sebelisoa ho fluorinate chloroform, mocheso oa karabelo o ka holimo ho 65ºC, antimony pentachloride e sebelisoa e le ntho e thusang, 'me qetellong tetrafluoroethylene e hlahisoa ke ho phatloha ha mocheso. Tetrafluoroethylene e ka boela ea hlahisoa ka ho arabela zinki ka tetrafluorodichloroethane ka mocheso o phahameng.
Tokisetso ea polytetrafluoroethylene
Ka ketleleng ea enamel kapa tšepe e sa hloekang ea polymerization, metsi a sebelisoa joalo ka seaplane, potasiamo persulfate e sebelisoa joalo ka moqali, letsoai la perfluorocarboxylic acid ammonium le sebelisoa joalo ka dispersant, fluorocarbon e sebelisoa joalo ka stabilizer, 'me tetrafluoroethylene e entsoe polymerized ho fumana polyethylene e phofshoana e ntle. Tetrafluoroethylene.
Eketsa li-additives tse fapaneng ho kettle ea karabelo, 'me monoma ea tetrafluoroethylene e kena ka kettle ea polymerization karolong ea khase. Fetola mocheso ka kettle ho 25 ° C, ebe o eketsa palo e itseng ea activator (sodium metabisulfite) ho qala polymerization ka mokhoa oa redox. Nakong ea ts'ebetso ea polymerization, li-monomers li ntse li eketsoa khafetsa, 'me khatello ea polymerization e bolokiloe ho 0.49 ~ 0.78MPa. Phahamiso e fumanoeng ka mor'a hore polymerization e hlapolotsoe sebakeng se itseng ka metsi, 'me mocheso o fetoloa ho 15 ~ 20ºC. Ka mor'a ho kopanngoa le mochine o susumetsang, o hlatsuoa ka metsi 'me o omisitsoe, ke hore, sehlahisoa sena se fumanoa e le resin e ntle ea granular.
Na Teflon e Sireletsehile?
Ho roala ha Teflon ka boeona ho bolokehile: thepa ea Teflon ka boeona ha e na chefo, e ke ke ea bola, ebile e ke ke ea baka likotsi tsa bophelo bo botle. Mohlomong ke hobane sebopeho sa eona sa limolek'hule ha e le hantle ha se qhibilihe lik'hemik'haleng tsa 'nete, re se re sa re letho ka ho sileha le ho monngoa ke 'mele oa motho.
Thepa e ikhethang ea PTFE e etsa hore e sebelisoe haholo mesebetsing ea indasteri le ea leoatleng joalo ka indasteri ea lik'hemik'hale, peterole, masela, lijo, ho etsa pampiri, meriana, lisebelisoa tsa elektronike le mechine.
Tšebeliso ea polytetrafluoroethylene (PTFE) ho thepa ea anti-corrosion:
Ka lebaka la bofokoli ba ho hanyetsa ho bola ha rabara, likhalase, lisebelisoa tsa tšepe le lisebelisoa tse ling, ho thata ho kopana le tikoloho e thata moo mocheso, khatello le mecha ea litaba ea lik'hemik'hale li leng teng, 'me tahlehelo e bakoang ke eona e tšosa haholo. Le ha thepa ea PTFE e na le khanyetso e ntle haholo ea kutu, polytetrafluoroethylene e sebelisa thepa e sa bolaeeng ke kutu ho liindasteri tsa petroleum, lik'hemik'hale, masela le tse ling.
Lisebelisoa tse khethehileng li kenyelletsa: liphaephe tsa ho tsamaisa, liphaephe tsa mouoane, liphaephe tsa mouoane bakeng sa ho tsamaisa likhase tse senyang, liphaephe tsa oli tse nang le khatello e phahameng bakeng sa lipeipi, liphaephe tse phahameng, tse mahareng le tse tlase tsa khatello ea lifofane bakeng sa tsamaiso ea lifofane tsa hydraulic le mechine ea khatiso e batang, litora tsa distillation, lisebelisoa tsa mocheso, kettle, litora le litanka. Ts'ebetso ea litiiso tsa lisebelisoa tsa lik'hemik'hale tse kang linings le li-valve li na le tšusumetso e kholo mosebetsing le ts'ebetsong ea mochine oohle le lisebelisoa. Lisebelisoa tsa PTFE li na le litšobotsi tsa ho hanyetsa kutu, ho hanyetsa botsofali, coefficient e tlase ea likhohlano le ho se khomarela, mefuta e mengata ea mocheso, le elasticity e ntle, e etsang hore e be e loketseng haholo bakeng sa ho etsa litiiso tse nang le litlhoko tse phahameng tsa ho hanyetsa le mocheso o sebetsang ka holimo ho 100 °. Joalo ka litiiso bakeng sa li-flanges tsa metjhini e kentsoeng, licheso tsa mocheso, likepe tse nang le khatello e phahameng, likepe tse bophara bo boholo, li-valve le lipompo, litiiso tsa lipitsa tsa khalase, li-flanges tse bataletseng, li-flanges tse bophara bo boholo, li-shafts, lithupa tsa piston, lithupa tsa valve, lipompo tsa gear tsa Worm, litiiso tsa melamu, joalo-joalo.
2.The low friction performance ea polytetrafluoroethylene (PTFE) e sebelisoa lits'ebetsong tsa mojaro.
Likarolo tsa likhohlano tsa lisebelisoa tse ling ha li tšoanele ho tlotsoa, joalo ka maemong ao mafura a tlotsoang a tla qhibiliha ka lihlapolli 'me a se ke a sebetsa, kapa ho etsa pampiri, meriana, lijo, masela joalo-joalo Lebaka ke hobane coefficient ea likhohlano ea thepa ena ke e tlase ka ho fetisisa har'a lisebelisoa tse tiileng tse tsejoang. Tšebeliso ea eona e khethehileng e kenyelletsa li-bearings tsa lisebelisoa tsa lik'hemik'hale, mechini ea ho etsa pampiri, le mechini ea temo, joalo ka mehele ea piston, liporo tsa tataiso ea mochini, le mehele ea tataiso. Li sebelisoa haholo mererong ea kaho ea sechaba e le li-slide tsa ts'ehetso bakeng sa marokho, lithapo tsa marulelo a tšepe ea kotopo, liphaephe tse kholo tsa lik'hemik'hale le litanka tsa polokelo. Li-blocks, hammoho le ho sebelisoa e le litšehetso tsa borokho le li-swivels tsa borokho, joalo-joalo.
3.Likopo tsa polytetrafluoroethylene (PTFE) lits'ebetsong tsa elektronike le tsa motlakase.
Tahlehelo e tlase ea tlhaho le lisebelisoa tse nyane tsa dielectric tsa PTFE li etsa hore e ka etsoa lithapo tsa enameled bakeng sa ho sebelisoa ho li-micro motors, thermocouples, control devices, joalo-joalo, filimi ea PTFE ea ho kenya motlakase Ke ntho e ntle e sireletsang bakeng sa ho etsa li-capacitor, li-radio insulating liners, lik'hebole tse insulated, li-motors le li-transformer. Hape ke e 'ngoe ea lisebelisoa tsa bohlokoa bakeng sa likarolo tsa elektroniki tsa indasteri tse kang sefofane le sefofane. Tšebeliso ea lifilimi tsa polasetiki tsa fluorine e na le matla a phahameng a ho kenella ho oksijene le ho phunyeletsa ho phahameng ho mouoane oa metsi. Mokhoa ona o ikhethileng oa ho kenella o ka sebelisoa ho etsa lisensara tsa oksijene. Litšobotsi tsa fluoroplastics tse bakang ho kheloha ha polar charges tlas'a mocheso o phahameng le khatello e phahameng li ka sebelisoa ho etsa li-microphone, libui, likarolo tsa liroboto, joalo-joalo, 'me refraction ea bona e tlase e ka sebelisoa. Litšobotsi tsa ts'ebetso e phahameng li ka etsa likhoele tsa optical.
4.Kopo ea polytetrafluoroethylene (PTFE) meriana ea bongaka.
Thepa e atolositsoeng ea PTFE ha e sebetse ebile e na le matla a ho ikamahanya le maemo a tlhaho. E ke ke ea baka ho khesoa ke 'mele' me ha e na litla-morao tsa 'mele oa motho. E ka etsoa sterilized ka mokhoa ofe kapa ofe. Sebopeho sa eona sa microporous se lumella ho sebelisoa litharollong tse fapaneng tsa ho tsosolosa, ho kenyelletsa le methapo ea mali ea maiketsetso le li-patches bakeng sa tsosoloso ea lisele tse bonolo le li-sutures tsa ho buoa bakeng sa opereishene ea methapo, pelo, ka kakaretso le ea masapo.
5.Kopo ea thepa e khahlanong le thupa ea polytetrafluoroethylene (PTFE).
Boitsebiso ba PTFE bo na le tsitsipano e nyenyane ka ho fetisisa ea holim'a metsi har'a thepa e tiileng 'me ha e khomarele ntho leha e le efe. E boetse e na le litšoaneleho tsa ho hanyetsa mocheso o phahameng le o tlaase le ho se sebetse ha lik'hemik'hale, ho etsa hore e tšoanelehe bakeng sa likopo tse kang ho etsa thepa. Lipane tse se nang thupa li sebelisoa haholo lits'ebetsong tse thibelang thupa. Ts'ebetso ea anti-adhesive haholo-holo e kenyelletsa mefuta e 'meli: ho kenya letlapa la PTFE holim'a substrate le ho beha Ho roala ha PTFE kapa varnish e kopantsoeng ka khalase holim'a substrate ka ho fokotseha ha mocheso.
Le hoja lisebelisoa tsa PTFE li ntse li e-na le bothata ba bothata bo phahameng ba ho cheselletsa, ka tsoelo-pele ea theknoloji, mekhoa e mecha ea ho kopanya e tla tloha e rarolla lintlha tse bohloko tsa PTFE le ho sebelisa PTFE libakeng tse ngata tse fapaneng.
AoKai PTFE ke setsebi
PTFE Coated Fiberglass Fabric Manufacturers le barekisi ba Chaena, ba khethehileng ka ho fana ka
PTFE Adhesive Tape,
PTFE Lebanta la Conveyor,
PTFE Mesh Belt Ho reka kapa ho rekisa lihlahisoa tsa
lesela la fiberglass tse koahetsoeng ka PTFE . Bophara bo bongata, botenya, mebala e fumaneha ka mokhoa o ikhethileng.
