Dab tsi yog cov khoom siv ptfe raj ua los ntawm?
Khoom taw qhia
1,Ptfe cevyog lwm lub npe rau polytetrafluoroethylene, cov lus Askiv luv yog PTFE, (feem ntau hu ua "Plastic King, Hara"), thiab cov tshuaj formula yog -(CF2-CF2)n-.Polytetrafluoroethylene tau raug nrhiav pom hauv xyoo 1938 los ntawm kws tshuaj Dr. Roy J. Plunkett hauv DuPont's Jackson Laboratory hauv New Jersey, Tebchaws Asmeskas Thaum nws sim ua ib qho chlorofluorocarbon tshiab Nyob rau hauv rooj plaub ntawm compound refrigerant.Cov khoom ntawm cov khoom siv no feem ntau yog hu ua "non-stick txheej";Nws yog cov khoom siv hluavtaws hluavtaws uas siv fluorine los hloov tag nrho cov hydrogen atoms hauv polyethylene.Cov khoom no yog resistant rau acids, alkalis, thiab ntau yam organic solvents, thiab yuav luag insoluble nyob rau hauv tag nrho cov kuab tshuaj.Nyob rau tib lub sijhawm, PTFE muaj cov yam ntxwv ntawm qhov kub thiab txias, thiab nws cov kev sib txhuam coefficient tsawg heev, yog li nws tuaj yeem siv los ua ib txoj hauv kev ntawm lubrication, thiab nws kuj tau dhau los ua cov txheej txheem zoo tshaj plaws rau cov txheej sab hauv ntawm cov lauj kaub uas tsis yog-stick. thiab cov kav dej
Cov khoom siv no feem ntau yog siv rau cov khoom hauv qab no:
PTFE, FEP, PFA, ETFE, AF, NXT, FFR.
PTFE: PTFE (polytetrafluoroethylene) non-stick txheej tuaj yeem siv tsis tu ncua ntawm 260°C, nrog qhov siab tshaj plaws siv ntawm 290-300°C, tsis tshua muaj kev sib txhuam coefficient, zoo hnav tsis kam thiab tshuaj lom neeg ruaj khov zoo heev.
FEP: FEP (fluorinated ethylene propylene copolymer) non-stick txheej melts thiab ntws los ua ib zaj duab xis tsis ntxeem tau thaum ci.Nws muaj kev ruaj ntseg tshuaj zoo heev thiab cov yam ntxwv zoo heev uas tsis yog-stick.Qhov siab tshaj plaws siv kub yog 200℃.
PFA: PFA (perfluoroalkyl compound) non-stick txheej melts thiab ntws thaum ci los ua ib zaj duab xis tsis ntxeem tau zoo li FEP.Qhov zoo ntawm PFA yog tias nws muaj qhov kub thiab txias ntawm 260°C, muaj zog rigidity thiab toughness, thiab tshwj xeeb tshaj yog haum rau siv nyob rau hauv anti-sticking thiab tshuaj tiv thaiv daim ntaub ntawv nyob rau hauv kub kub.
PTFE (Polytetrafluoroethene) yog cov khoom siv hluavtaws hluavtaws uas siv fluorine los hloov tag nrho cov hydrogen atoms hauv polyethylene.Cov khoom no yog resistant rau acids, alkalis, thiab ntau yam organic solvents, thiab yuav luag insoluble nyob rau hauv tag nrho cov kuab tshuaj.Nyob rau tib lub sijhawm, ptfe raj muaj cov yam ntxwv ntawm qhov kub thiab txias, thiab nws cov kev sib txhuam coefficient tsawg heev, yog li nws tuaj yeem siv rau lubrication, thiab nws kuj tau dhau los ua cov txheej txheem zoo tshaj plaws rau cov woks yooj yim thiab cov kav dej.Nws tuaj yeem siv rau cov kav xa hluav taws xob corrosion, siab thiab kub tsis kam, thiab corrosion kuj.Siv nyob rau hauv ib puag ncig hnyav xws li lubrication, engineering, electronics, khoom siv hluav taws xob, thiab aviation.
Khoom nta
1, Kub thiab tsis kub tsis kam: me ntsis cuam tshuam rau qhov kub thiab txias, dav kub ntau, siv tau kub -65 ~ 260 ℃.
2, Tsis-nplaum: Yuav luag tag nrho cov khoom tsis raug khi rau PTFE zaj duab xis.Cov yeeb yaj kiab nyias nyias kuj qhia tau zoo tsis cuam tshuam kev ua haujlwm.2. Thaum tshav kub kub ua hauj: PTFE txheej zaj duab xis muaj zoo heev tshav kub tsis kam thiab tsis kub tsis kam.Nws tuaj yeem tiv taus qhov kub siab txog 300 ° C hauv lub sijhawm luv luv, thiab feem ntau tuaj yeem siv tsis tu ncua ntawm 240 ° C thiab 260 ° C.Nws muaj qhov tseem ceeb thermal stability.Nws tuaj yeem ua haujlwm ntawm qhov txias txias yam tsis muaj embrittlement thiab tsis yaj ntawm qhov kub thiab txias.
3, zawv zawg khoom: PTFE txheej zaj duab xis muaj ntau dua coefficient ntawm kev sib txhuam.Kev sib txhuam coefficient hloov thaum lub load yog zawv zawg, tab sis tus nqi tsuas yog nyob nruab nrab ntawm 0.05-0.15.
4 、 Moisture resistance : Qhov saum npoo ntawm PTFE txheej zaj duab xis tsis lo rau dej thiab roj, thiab nws tsis yooj yim rau lo rau cov tshuaj thaum lub sijhawm ua haujlwm ntau lawm.Yog tias muaj av me me, tsuas yog so nws tawm.Lub sijhawm luv luv, txuag sijhawm ua haujlwm thiab txhim kho kev ua haujlwm zoo.
5, Hnav tsis kam: Nws muaj kev hnav zoo heev nyob rau hauv siab load.Nyob rau hauv ib qho kev thauj khoom, nws muaj ob qhov zoo ntawm kev hnav tsis kam thiab tsis cuam tshuam.
6, Corrosion kuj: PTFE tsis tshua muaj corroded los ntawm cov tshuaj, thiab tuaj yeem tiv taus tag nrho cov acids muaj zog (xws li aqua regia) thiab muaj zog oxidants tshwj tsis yog cov hlau alkali molten, fluorinated media thiab sodium hydroxide saum 300 ° C.Lub luag haujlwm ntawm kev txo tus neeg sawv cev thiab ntau yam kuab tshuaj organic tuaj yeem tiv thaiv qhov chaw ntawm txhua yam tshuaj lom neeg corrosion
chemical khoom
1, Rwb thaiv tsev: Tsis cuam tshuam los ntawm ib puag ncig thiab zaus, qhov ntim tsis kam tuaj yeem ncav cuag 1018 ohm·cm, lub dielectric poob me me, thiab qhov hluav taws xob tawg yog siab.
2, Kub thiab tsis kub tsis kam: me ntsis cuam tshuam rau qhov kub thiab txias, dav kub ntau, siv tau kub -190 ~ 260 ℃.
3 、 Lubricating tus kheej: Nws muaj qhov tsawg tshaj plaws coefficient ntawm kev sib txhuam ntawm cov yas thiab yog cov khoom siv roj tsis muaj roj zoo tshaj plaws.
4, Nto tsis-stickiness: paub cov khoom siv tsis tuaj yeem ua raws li qhov chaw, nws yog cov khoom siv nrog lub zog me tshaj plaws.
5 、 Huab cua tsis kam, hluav taws xob tiv thaiv thiab tsis tshua muaj permeability: lub sij hawm ntev raug rau huab cua, qhov chaw thiab kev ua haujlwm tsis hloov.
6, Incombustibility: Cov pa oxygen txwv tsis pub qis dua 90.
7, PTFE yog dav siv nyob rau hauv kev lag luam uas yuav tsum tau kub kub kuj thiab siab viscosity.Qhov muaj zog tshaj super acid-fluoroantimonic acid kuj tseem siv tau rau kev khaws cia
Cov khoom siv hauv cheeb tsam
Polytetrafluoroethylene tuaj yeem tsim los ntawm kev thawb lossis extruding;nws tseem tuaj yeem ua rau hauv zaj duab xis thiab tom qab ntawd txiav mus rau hauv cov ncej-mounted PTFE daim kab xev thaum siv cov xov hlau kub kub.Nws yog siv los tsim high-frequency cables thiab ncaj qha ua rau hauv dej dispersion.Nws tuaj yeem siv rau txheej, impregnation lossis fiber ntau ua.
Polytetrafluoroethylene yog dav siv nyob rau hauv kev lag luam xws li nuclear zog, tiv thaiv lub teb chaws, aerospace, electronics, hluav taws xob, tshuaj, machinery, seev, meters, kev tsim kho, textiles, hlau nto kho mob, tshuaj, kho mob, khoom noj khoom haus, metallurgy thiab smelting, thiab lwm yam. cov ntaub ntawv, cov ntaub ntawv insulating, anti-stick coatings, thiab lwm yam. ua rau nws yog ib qho khoom irreplaceable.
PTFE lub cevNws muaj cov khoom zoo tshaj plaws, kev kub siab ua haujlwm, kev tiv thaiv corrosion, tsis yog-stick, nws tus kheej lubricating, zoo heev dielectric zog, thiab kev sib txhuam coefficient tsawg heev.Siv los ua engineering plastics, nws tuaj yeem ua rau PTFE raj, rods, txoj siv sia, daim hlau, zaj duab xis, thiab lwm yam. Feem ntau siv hauv cov kav dej tiv thaiv corrosion, ntim, twj, li qub, radar, cov khoom siv sib txuas lus siab, xov tooj cua, radomes, thiab lwm yam nrog kev ua haujlwm siab.Ntxiv cov muab tub lim uas tuaj yeem tiv taus qhov kub thiab txias ntawm polytetrafluoroethylene, nws cov khoom siv kho tshuab tuaj yeem txhim kho tau zoo.Nyob rau tib lub sijhawm, lwm yam khoom zoo ntawm PTFE raug tswj xyuas.Muaj ntau hom muaj xws li iav fiber ntau, hlau, hlau oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, thiab lwm yam. Cov hnav tsis kam thiab txwv PV tus nqi tuaj yeem nce 1000 zaug.
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Post lub sij hawm: Jan-07-2021