Teflon feem ntau hu ua polytetrafluoroethylene (English abbreviation teflon los yog [PTFE, F4]), hu ua / feem ntau hu ua "plastic huab tais", thiab tseem hu ua "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", thiab "Teflon". Nws yog ib qho polymer compound ua los ntawm tetrafluoroethylene los ntawm polymerization, thiab nws cov qauv yog yooj yim li -[-cf2-cf2 -]n-.

Polytetrafluoroethylene, feem ntau hu ua cov txheej tsis-stick lossis cov khoom siv yooj yim los ntxuav. Cov khoom no muaj cov yam ntxwv ntawm cov kua qaub thiab alkali tsis kam, tsis kam mus rau ntau yam organic solvents, thiab yuav luag insoluble nyob rau hauv tag nrho cov kuab tshuaj. Nyob rau tib lub sijhawm, polytetrafluoroethylene muaj cov yam ntxwv ntawm qhov kub thiab txias, nws cov coefficient ntawm kev sib txhuam yog tsawg heev, yog li nws tuaj yeem siv rau lubrication, tab sis kuj dhau los ua cov txheej txheem zoo tshaj plaws kom yooj yim los ntxuav cov txheej hauv cov kav dej.

Teflon plating feem ntau yog nyob ntawm seb hom txheej txheem koj xav tau los txiav txim seb yuav txau li cas. Qhov tseem ceeb tshaj plaws yog tias Teflon txheej yuav tsum tau muab ci rau qhov kub thiab txias ua ntej nws tuaj yeem siv tau.

Cov yam ntxwv ntawm Teflon:

Non-adhesive: Yuav luag txhua yam khoom tsis sib txuas nrog teflon txheej.

Tsawg kub tsis kam: zoo mechanical toughness; Txawm hais tias qhov kub thiab txias poob mus rau -196 ° C, 5% elongation tuaj yeem tswj tau. Nws tseem mos ntawm -100 degrees.

Kev kub siab ua haujlwm: polytetrafluoroethylene txheej muaj cua sov zoo thiab tsis kub tsis kam. Nws tuaj yeem tiv taus qhov kub siab txog 300 ° C rau lub sijhawm luv luv, feem ntau tuaj yeem siv tsis tu ncua ntawm 240 ° C thiab 260 ° C, thiab muaj cov thermal stability tseem ceeb, nws tuaj yeem ua haujlwm ntawm qhov txias txias yam tsis muaj embrittlement, thiab tsis yaj ntawm qhov kub thiab txias. .

High lubrication: Nws yog qhov qis tshaj qhov sib txhuam coefficient hauv cov khoom siv. Nws muaj qhov coefficient qis tshaj ntawm kev sib txhuam (0.04) ntawm cov yas. Smoo dua li dej khov.

Moisture resistance: PTFE txheej yog tsis stained nrog dej thiab roj, thiab nws tsis yooj yim rau lo rau cov tshuaj thaum lub sij hawm tsim khoom. Yog tias muaj cov av me me, nws tuaj yeem raug tshem tawm los ntawm kev so yooj yim. Lub sijhawm luv luv txuag lub sijhawm thiab txhim kho kev ua haujlwm zoo.

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-adhesion.

Corrosion resistance: polytetrafluoroethylene yuav luag tsis pub siv tshuaj tua kab mob, thiab tuaj yeem tiv taus tag nrho cov acids muaj zog (xws li aqua aqua), muaj zog oxidants, txo cov neeg ua haujlwm thiab ntau yam organic solvents ntxiv rau cov hlau alkali, fluorinated media thiab sodium hydroxide saum 300 ° C, thiab tuaj yeem tiv thaiv qhov chaw los ntawm txhua yam tshuaj lom neeg corrosion.

Kev laus 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.

Incombustible: oxygen txwv qhov ntsuas qis dua 90.

Acid thiab alkali tsis kam: insoluble nyob rau hauv muaj zog acids, muaj zog bases thiab organic solvents (xws li magic acid, uas yog, fluoroantimonic acid).

Oxidation kuj: resistant rau corrosion los ntawm muaj zog oxidants.

Rwb thaiv tsev: Cov khoom siv hluav taws xob zoo heev, yog cov khoom siv hluav taws xob zoo C-chav kawm, ib txheej ntawm cov ntawv xov xwm tuab tuaj yeem thaiv 1500V siab. Nws cov hluav taws xob rwb thaiv tsev tsis cuam tshuam los ntawm qhov kub thiab txias. Lub dielectric tsis tu ncua thiab dielectric poob yog tsawg nyob rau hauv ib tug dav ntau zaus, thiab lub breakdown voltage, ntim resistivity thiab arc kuj yog siab.

Acid-base: nruab nrab.