PTFE Mediafeem ntau yog hais txog kev tshaj tawm ua los ntawm polytetrafluoroethylene (PTFE luv luv). Cov hauv qab no yog cov lus qhia ntxaws ntxaws rau PTFE media:
Ⅰ. Khoom siv
1.Chemical stability
PTFE yog cov khoom ruaj khov heev. Nws muaj zog chemical tsis kam thiab yog inert rau yuav luag tag nrho cov tshuaj. Piv txwv li, nyob rau hauv ib puag ncig ntawm cov kua qaub muaj zog (xws li sulfuric acid, nitric acid, thiab lwm yam), muaj zog hauv paus (xws li sodium hydroxide, thiab lwm yam) thiab ntau cov kuab tshuaj organic (xws li benzene, toluene, thiab lwm yam), PTFE cov ntaub ntawv yuav tsis hnov mob chemical. Qhov no ua rau nws nrov heev hauv cov ntawv thov xws li cov ntsaws ruaj ruaj thiab cov yeeb nkab hauv ob sab phlu hauv kev lag luam tshuaj thiab tshuaj, vim tias cov kev lag luam no feem ntau yuav tsum tau cuam tshuam nrog ntau yam tshuaj lom neeg.
2.Qhov kub tsis kam
PTFE xov xwm tuaj yeem tswj hwm nws qhov kev ua tau zoo tshaj qhov kub thiab txias. Nws tuaj yeem ua haujlwm ib txwm nyob rau hauv qhov kub ntawm -200 ℃ to 260 ℃. Thaum qhov kub thiab txias, nws yuav tsis ua nkig; ntawm qhov kub thiab txias, nws yuav tsis decompose los yog deform yooj yim li ib co zoo tib yam plastics. Qhov ntsuas kub zoo no ua rau PTFE xov xwm muaj kev siv tseem ceeb hauv aerospace, electronics thiab lwm yam kev lag luam. Piv txwv li, nyob rau hauv hydraulic system ntawm ib lub dav hlau, PTFE xov xwm tuaj yeem tiv taus qhov kub siab uas tsim los ntawm kev hloov pauv kub thiab qhov system ua haujlwm thaum lub davhlau.
3. Tsawg kev sib txhuam coefficient
PTFE muaj qhov tsis tshua muaj kev sib txhuam coefficient, yog ib qho qis tshaj ntawm cov ntaub ntawv paub zoo. Nws cov dynamic thiab zoo li qub kev sib txhuam coefficients yog ob qho tib si me me, txog 0.04. Qhov no ua rau PTFE dielectric zoo heev thaum siv los ua roj nplua nyeem hauv cov khoom siv tshuab. Piv txwv li, hauv qee cov khoom siv sib kis, cov kabmob lossis cov kabmob ua los ntawm PTFE tuaj yeem txo qhov kev sib txhuam ntawm cov khoom siv tshuab, txo kev siv zog, thiab txuas ntxiv lub neej kev pabcuam ntawm cov khoom siv.
4. Hluav taws xob rwb thaiv tsev
PTFE muaj cov khoom siv hluav taws xob zoo. Nws tuav cov rwb thaiv tsev siab tshaj qhov ntau zaus. Hauv cov khoom siv hluav taws xob, PTFE dielectric tuaj yeem siv los ua cov ntaub ntawv insulating, xws li rwb thaiv tsev ntawm cov xov hlau thiab cables. Nws tuaj yeem tiv thaiv cov xau tam sim no, ua kom lub cev ua haujlwm ntawm cov khoom siv hluav taws xob, thiab tiv thaiv kev cuam tshuam sab nraud ntawm electromagnetic.
Piv txwv li, nyob rau hauv high-ceev kev sib txuas lus cables, PTFE rwb thaiv tsev txheej tuaj yeem ua kom ruaj khov thiab raug ntawm cov teeb liab kis tau tus mob.
5. Tsis nplaum
Qhov saum npoo ntawm PTFE dielectric muaj qhov tsis muaj zog. Qhov no yog vim qhov electronegativity ntawm fluorine atoms hauv PTFE molecular qauv yog siab heev, ua rau nws nyuaj rau PTFE nto rau chemically bond nrog lwm yam tshuaj. Qhov no tsis yog-stickiness ua rau PTFE dav siv nyob rau hauv coatings rau cov tais diav (xws li tsis-stick pans). Thaum cov zaub mov siav nyob rau hauv lub lauj kaub uas tsis yog-stick, nws yuav tsis yooj yim ua raws li lub lauj kaub phab ntsa, ua kom yooj yim los ntxuav thiab txo cov roj uas siv thaum ua noj.
Dab tsi yog qhov txawv ntawm PVDF thiab PTFE?
PVDF (polyvinylidene fluoride) thiab PTFE (polytetrafluoroethylene) yog ob qho tib si fluorinated polymers nrog ntau yam khoom zoo sib xws, tab sis lawv kuj muaj qee qhov sib txawv hauv cov qauv tshuaj, kev ua haujlwm thiab kev siv. Cov hauv qab no yog lawv qhov sib txawv tseem ceeb:
Ⅰ. Cov qauv tshuaj
PVDF khoom:
Cov qauv tshuaj yog CH2-CF2n, uas yog semi-crystalline polymer.
Cov saw molecular muaj methylene alternating (-CH2-) thiab trifluoromethyl (-CF2-) units.
PTFE:
Cov qauv tshuaj yog CF2-CF2n, uas yog perfluoropolymer.
Cov saw molecular yog tsim los ntawm fluorine atoms thiab carbon atoms, tsis muaj hydrogen atoms.
Ⅱ. Kev sib piv kev ua haujlwm
| Performance Index | PVDF | PTFE |
| Tshuaj tiv thaiv | Cov tshuaj tiv thaiv zoo, tab sis tsis zoo li PTFE. Kev ua haujlwm zoo rau feem ntau cov kua qaub, cov hauv paus thiab cov kuab tshuaj organic, tab sis tsis zoo rau cov hauv paus muaj zog ntawm qhov kub thiab txias. | Inert rau yuav luag tag nrho cov tshuaj, tsis tshua muaj tshuaj resistant. |
| Kub tiv taus | Kev khiav hauj lwm kub yog -40 ℃ ~ 150 ℃, thiab kev ua haujlwm yuav txo qis ntawm qhov kub thiab txias. | Kev khiav hauj lwm kub yog -200 ℃ ~ 260 ℃, thiab kub kuj yog zoo heev. |
| Mechanical zog | Lub zog txhua yam yog siab, nrog lub zog tensile zoo thiab cuam tshuam tsis kam. | Lub zog txhua yam yog qhov tsawg, tab sis nws muaj qhov yooj yim thiab qaug zog ua haujlwm. |
| Kev sib txhuam coefficient | Kev sib txhuam coefficient tsawg, tab sis siab dua PTFE. | Kev sib txhuam coefficient yog tsawg heev, yog ib qho qis tshaj ntawm cov khoom siv paub zoo. |
| Hluav taws xob rwb thaiv tsev | Cov hluav taws xob rwb thaiv tsev ua tau zoo, tab sis tsis zoo li PTFE. | Cov hluav taws xob rwb thaiv tsev kev ua tau zoo heev, haum rau high zaus thiab high voltage ib puag ncig. |
| Tsis-stickiness | Qhov tsis nplaum yog qhov zoo, tab sis tsis zoo li PTFE. | Nws muaj zog heev uas tsis yog-stickiness thiab yog cov khoom tseem ceeb rau non-stick pan coatings. |
| Kev ua tau zoo | Nws yog ib qho yooj yim rau txheej txheem thiab tuaj yeem tsim los ntawm cov txheej txheem xws li kev txhaj tshuaj molding thiab extrusion. | Nws yog ib qho nyuaj rau cov txheej txheem thiab feem ntau yuav tsum tau tshwj xeeb cov txheej txheem xws li sintering. |
| Qhov ntom | Qhov ceev yog li 1.75 g / cm³, uas yog lub teeb. | Qhov ceev yog li 2.15 g / cm³, uas yog hnyav heev. |
Ⅲ. Daim ntawv thov teb
| Daim ntawv thov | PVDF | PTFE |
| Kev lag luam tshuaj | Siv los tsim cov kav dej tiv thaiv corrosion, li qub, twj tso kua mis thiab lwm yam khoom siv, tshwj xeeb tshaj yog tsim rau kev tuav cov kua qaub lossis alkaline ib puag ncig. | Dav siv nyob rau hauv ob sab phlu, seals, kav, thiab lwm yam ntawm cov khoom siv tshuaj, haum rau huab cua chemical ib puag ncig. |
| Kev lag luam hluav taws xob | Siv los tsim vaj tse, rwb thaiv tsev txheej, thiab lwm yam ntawm cov khoom siv hluav taws xob, haum rau nruab nrab zaus thiab qhov hluav taws xob ib puag ncig. | Siv los tsim insulating qhov chaw ntawm high-frequency cables thiab hluav taws xob connectors, haum rau high zaus thiab high voltage ib puag ncig. |
| Mechanical kev lag luam | Siv los tsim cov khoom siv kho tshuab, bearings, ntsaws ruaj ruaj, thiab lwm yam, haum rau nruab nrab load thiab kub ib puag ncig. | Siv los tsim cov khoom tsis muaj kev sib txhuam, cov ntsaws ruaj ruaj, thiab lwm yam, haum rau qhov kub thiab txias thiab tsis muaj kev sib txhuam ib puag ncig. |
| Khoom noj khoom haus thiab tshuaj kev lag luam | Siv los tsim cov khoom siv khoom noj khoom haus, cov khoom siv tshuaj, thiab lwm yam, haum rau nruab nrab kub thiab tshuaj lom neeg ib puag ncig. | Siv los tsim cov txheej txheem uas tsis yog lo nplaum, cov khoom siv conveyor siv, cov khoom siv tshuaj, thiab lwm yam., haum rau qhov kub thiab txias thiab muaj zog chemical ib puag ncig. |
| Kev tsim kho kev lag luam | Siv los tsim cov khoom siv phab ntsa sab nrauv, cov ntaub ntawv vov tsev, thiab lwm yam, nrog cov huab cua tsis zoo thiab zoo nkauj. | Siv los tsim cov khoom sib khi hauv tsev, cov ntaub ntawv tsis muaj dej, thiab lwm yam, haum rau qhov chaw huab cua. |
Ⅳ. Nqi
PVDF: Tus nqi qis, pheej yig dua.
PTFE: Vim nws cov txheej txheem tshwj xeeb thiab kev ua haujlwm zoo, tus nqi siab dua.
Ⅴ. Kev cuam tshuam ib puag ncig
PVDF: Ib qho me me ntawm cov pa phem yuav raug tso tawm ntawm qhov kub thiab txias, tab sis tag nrho ib puag ncig cuam tshuam me me.
PTFE: Cov tshuaj phem xws li perfluorooctanoic acid (PFOA) yuav raug tso tawm ntawm qhov kub thiab txias, tab sis cov txheej txheem tsim khoom niaj hnub tau txo qhov kev pheej hmoo no.
Post lub sij hawm: May-09-2025