PTFE (polytetrafluoroethylene)thiab polyester (xws li PET, PBT, thiab lwm yam) yog ob yam khoom siv polymer sib txawv kiag li. Lawv muaj qhov sib txawv tseem ceeb hauv cov qauv tshuaj lom neeg, cov yam ntxwv kev ua tau zoo thiab cov teb siv. Cov hauv qab no yog kev sib piv ntxaws ntxaws:
1. Cov qauv tshuaj lom neeg thiab cov qauv sib xyaw
PTFE (polytetrafluoroethylene)
●Cov Qauv: Nws yog tsim los ntawm cov saw hlau carbon thiab cov tshuaj fluorine uas yog saturated tag nrho (-CF₂-CF₂-), thiab yog ib qho fluoropolymer.
●Nta: Cov pa roj carbon-fluorine muaj zog heev ua rau nws muaj zog heev thiab tiv taus huab cua.
Polyester
●Cov Qauv: Cov saw tseem ceeb muaj ib pawg ester (-COO-), xws li PET (polyethylene terephthalate) thiab PBT (polybutylene terephthalate).
●Nta: Cov ester bond muab nws lub zog zoo thiab kev ua haujlwm tau zoo, tab sis nws cov tshuaj lom neeg ruaj khov qis dua li PTFE.
2. Kev sib piv kev ua tau zoo
| Cov yam ntxwv | PTFE | Polyester (xws li PET) |
| Kev tiv thaiv kub | - Siv kub tas mus li: -200 ° C txog 260 ° C | - PET: -40 ° C txog 70 ° C (lub sijhawm ntev) |
| Kev ruaj khov tshuaj lom neeg | Tiv taus yuav luag txhua cov kua qaub, alkalis thiab cov kuab tshuaj ("yas vaj ntxwv") | Tiv taus cov kua qaub tsis muaj zog thiab alkalis, yooj yim corroded los ntawm cov kua qaub muaj zog thiab alkalis |
| Kev sib txhuam coefficient | Qis heev (0.04, nws tus kheej lubricating) | Siab dua (xav tau cov khoom ntxiv kom txhim kho) |
| Lub zog kho tshuab | Tsawg qis, yooj yim rau creep | Siab dua (PET feem ntau siv rau hauv cov fibers thiab lub raj mis) |
| Cov khoom dielectric | Zoo heev (cov khoom siv rwb thaiv tsev zaus siab) | Zoo (tab sis rhiab rau cov av noo) |
| Qhov nyuaj ntawm kev ua haujlwm | Nyuaj rau cov txheej txheem yaj (xav tau sintering) | Yuav tsum tau txhaj tshuaj thiab extruded (yooj yim rau kev ua) |
Cov teb thov
PTFE: siv dav hauv aerospace, khoom siv hluav taws xob, kev lag luam tshuaj lom neeg, kev ua zaub mov, kev kho mob thiab lwm yam teb, feem ntau siv los ua cov foob, cov kabmob, cov txheej txheem, cov ntaub ntawv rwb thaiv tsev, thiab lwm yam.
Polyester: feem ntau yog siv rau hauv cov ntaub textile, cov fwj yas, cov yeeb yaj kiab, cov yas engineering thiab lwm yam teb
Kev nkag siab yuam kev ntau zaus
Txheej tsis lo: PTFE (Teflon) feem ntau siv rau hauv cov lauj kaub tsis lo, thaum polyester tsis tuaj yeem tiv taus kev ua noj kub siab.
Cov khoom siv fiber: Cov polyester fibers (xws li polyester) yog cov khoom siv tseem ceeb rau khaub ncaws, thiabPTFE fiberstsuas yog siv rau cov hom phiaj tshwj xeeb xwb (xws li cov khaub ncaws tiv thaiv tshuaj lom neeg)
PTFE siv li cas hauv kev lag luam khoom noj?
PTFE (polytetrafluoroethylene) muaj ntau yam kev siv hauv kev lag luam zaub mov, feem ntau yog vim nws cov tshuaj lom neeg ruaj khov zoo heev, tiv taus kub siab, tsis nplaum thiab coefficient sib txhuam tsawg. Cov hauv qab no yog cov ntawv thov tseem ceeb ntawm PTFE hauv kev lag luam zaub mov:
1. Kev txheej txheem khoom noj khoom haus
PTFE txheej yog siv dav hauv kev kho thiab kho qhov chaw ntawm cov khoom siv ua zaub mov. Nws txoj kev tsis nplaum tuaj yeem tiv thaiv cov zaub mov kom tsis txhob lo rau ntawm qhov chaw ntawm cov khoom siv thaum lub sijhawm ua, yog li ua kom yooj yim rau cov txheej txheem ntxuav thiab txhim kho kev ua haujlwm ntau lawm. Piv txwv li, hauv cov khoom siv xws li qhov cub, lub tshuab ua pa, thiab lub tshuab sib xyaw, PTFE txheej tuaj yeem ua kom cov zaub mov tsis lo rau thaum lub sijhawm ua haujlwm kub siab thaum tswj hwm kev ncaj ncees thiab zoo ntawm cov zaub mov.
2. Cov siv sia thiab cov siv sia
Cov siv sia thiab cov siv sia uas muaj PTFE txheej feem ntau siv rau hauv kev ua zaub mov ntau, xws li ua noj thiab xa qe, nqaij npuas kib, hnyuv ntxwm, nqaij qaib, thiab hamburgers. Qhov sib txhuam qis thiab kev tiv taus kub ntawm cov khoom no ua rau nws ua haujlwm ruaj khov hauv qhov chaw kub siab yam tsis ua rau cov zaub mov puas tsuaj.
3. Cov kav dej qib zaub mov
Cov yeeb nkab PTFE siv dav rau kev thauj khoom noj thiab dej haus, suav nrog cawv txiv hmab, npias, khoom noj mis nyuj, kua txiv hmab txiv ntoo thiab cov khoom qab zib. Nws cov tshuaj lom neeg tsis muaj zog ua kom nws tsis cuam tshuam rau qhov zoo ntawm cov khoom xa tuaj hauv qhov kub ntawm -60°C txog 260°C, thiab tsis qhia txog xim, saj lossis tsw. Tsis tas li ntawd, PTFE hoses ua tau raws li FDA cov qauv kom ntseeg tau tias muaj kev nyab xeeb ntawm cov zaub mov.
4. Cov ntsaws ruaj ruaj thiab cov gaskets
Cov foob PTFE thiab cov gaskets siv rau hauv kev sib txuas ntawm cov kav dej, cov qhov dej thiab cov paddles ntawm cov khoom siv ua zaub mov. Lawv tuaj yeem tiv taus xeb los ntawm ntau yam tshuaj lom neeg thaum tseem ruaj khov hauv qhov chaw kub siab. Cov foob no tuaj yeem tiv thaiv cov zaub mov kom tsis txhob muaj kuab paug thaum lub sijhawm ua haujlwm thiab ua kom yooj yim rau kev ntxuav thiab kev saib xyuas cov khoom siv.
5. Cov ntaub ntawv ntim khoom noj
PTFE kuj tseem siv rau hauv cov ntaub ntawv ntim khoom noj, xws li cov txheej txheej uas tsis lo rau hauv lauj kaub, cov ntawv ci, thiab lwm yam. Cov ntaub ntawv no ua kom cov khoom noj tsis lo rau thaum lub sijhawm ntim khoom thiab ua noj, thaum tswj kev huv thiab kev nyab xeeb ntawm cov khoom noj.
6. Lwm yam kev siv
PTFE kuj tseem siv tau rau hauv cov iav, cov kabmob bushings thiab cov khoom siv yas engineering hauv kev ua zaub mov, uas tuaj yeem txhim kho kev hnav tsis kam thiab kev tiv thaiv corrosion ntawm cov khoom siv thaum txo cov nqi txij nkawm.
Kev xav txog kev nyab xeeb
Txawm hais tias PTFE muaj ntau yam khoom zoo heev, koj tseem yuav tsum tau them sai sai rau nws txoj kev nyab xeeb thaum siv nws hauv kev lag luam zaub mov. PTFE tuaj yeem tso tawm cov pa phem me me ntawm qhov kub siab, yog li nws yog qhov tsim nyog los tswj qhov kub thiab txias siv thiab zam kev kub siab ntev. Tsis tas li ntawd, nws yog qhov tseem ceeb heev rau kev xaiv cov ntaub ntawv PTFE uas ua tau raws li cov cai tswjfwm.
Lub sijhawm tshaj tawm: Lub Peb Hlis-26-2025