Qhov cua sov ntawm PTFE yog dab tsi?

Cov cua kub ntawm PTFE (Polytetrafluoroethylene), feem ntau hu ua Teflon, hais txog rov qab rau cov txheej txheem ntawm kev nce nws qhov kub thiab txias rau ntau lub hom phiaj, uas muaj xws li shaping, sib sau, los yog siv los ua cov txheej txheem cua sov. PTFE zoo-paub qhia meej lub tsev thaum cua sov, uas tej zaum yuav yog ib qho tseem ceeb kom paub txog nws cov nqi hluav taws xob raug thiab tuav. Nov yog ob peb yam cuam tshuam nrog cov cua sov ntawm PTFE:
Melting txheej txheem: PTFE muaj ib tug ntau melting yam ntawm txog 327 degree (620 degree F). Thaum rhuab mus rau qhov ntsuas kub no, nws hloov mus los ntawm qhov ruaj khov mus rau lub xeev ua kua tag. Cov khoom no yog siv rau hauv cov tswv yim xws li molding thiab extrusion, nyob rau hauv uas PTFE yog fashioned rau hauv cov duab nyiam ua ntej txias thiab solidifying.
Kev txwv kub: Rau kev siv tsis nres, PTFE tau pom zoo kom ua haujlwm ntawm qhov kub ntau li 260 degree (500 degree F), thiab rau lub sijhawm luv luv, nws tuaj yeem ntsib qhov kub txog li 300 degree (572 degree F) . Tshaj li qhov kub thiab txias, cov ntaub tuaj yeem pib degrade, tso cov pa phem thiab tso nws cov tsev zoo meej.
Outgassing: Thaum lub sij hawm ua ntej cua sov los yog thaum lub sij hawm PTFE yog uncovered mus rau kub saum toj no chav tsev kub, nws muaj peev xwm outgas, tso tawm tsawg tiers ntawm fluorocarbons thiab txawv unstable tshuaj. Qhov no yog qhov tseem ceeb uas yuav tsum nco qab hauv lub tshuab nqus tsev thiab chav huv huv kom tsis txhob muaj kab mob.
Daim ntaub ntawv txheej: PTFE feem ntau yog siv los ua txheej txheej ntawm cov cua sov vim nws cov khoom tsis-stick, kub-resistant, thiab chemically inert tsev. Thaum nqa mus rau cov cua sov, cov hlua, lossis cov chaw, nws ua tiav lawv cov kav ntev, yooj yim ntawm kev ntxuav, thiab tsis kam mus rau tshuaj lom neeg corrosion.
Thermal Expansion: Zoo li cov khoom siv siab tshaj plaws, PTFE nthuav dav thaum cua sov. Nws coefficient ntawm linear thermal enlargement yog qhov tseem ceeb tshaj, qhov no txhais tau hais tias ceev faj yuav tsum tau coj mus rau lub kam rau ua thiab clearances thaum tsim additives thiaj li yuav raug kub hloov.
Decomposition thiab Toxicity: Yog tias overheated, PTFE tuaj yeem decompose, tso cov pa phom sij ua ke nrog hydrofluoric acid thiab cov pa roj sib txawv. Qhov no qhia txog qhov tseem ceeb ntawm kev tswj qhov kub thiab kev siv cov huab cua txaus thaum cua sov PTFE cov ntaub ntawv.
Xim Hloov: PTFE kuj tseem tuaj yeem ntxiv qhov ntxoov ntxoo thaum tshav kub, feem ntau tsaus nti, uas yog lub cim lag luam ntawm thermal strain lossis degradation.
Zuag qhia tag nrho, cua sov PTFE yog cov txheej txheem tswj kev ua tiav hauv qhov tshwj xeeb kub txwv kom siv nws lub tsev meej rau kev lag luam thiab cov neeg siv khoom sib txawv, tib lub sij hawm txo qhov muaj peev xwm txaus ntshai cuam tshuam txog kev kub dhau.