PTFE vs PFA vs FEP Tubing

Tej zaum koj yuav tau ntsib qhov teeb meem no thaum lub sijhawm xaiv cov khoom siv: PTFE, PFA, thiab FEP - txawm hais tias lawv lub npe zoo sib xws, txhua yam khoom siv muaj cov yam ntxwv ua tau zoo sib xws. Kev xaiv qhov kev xaiv tsis raug tuaj yeem ua rau tus nqi ntau dhau lossis kev ncua sijhawm ntawm qhov project. Los ntawm kev sib cuag nrog cov neeg siv khoom, peb tau pom tias ntau tus neeg kho "cov kav dej fluoroplastic" ua ib pawg dav dav, tsuas yog paub tias lawv tau xaiv cov khoom siv tsis raug thaum muaj teeb meem khoom siv. Tsab xov xwm no muab kev nkag siab meej txog qhov sib txawv tseem ceeb ntawm peb cov khoom siv no thiab qhov laj thawj tom qab lawv xaiv.

• PTFE ua kom pom tseeb tias nws tiv taus kub thiab tshuaj lom neeg zoo tshaj plaws, tab sis nws tsis pom tseeb thiab tsis tuaj yeem yaj lossis vuam.

• PFA ua ke nrog kev tiv taus kub, pob tshab, thiab kev vuam tau, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv semiconductor thiab cov chaw muaj kev ntshiab siab.

• FEP yog cov khoom siv uas yooj ywm thiab pob tshab tshaj plaws, nrog rau qhov kub tsis kam me ntsis, ua rau nws zoo tagnrho rau kev pom kev ntws thiab kev siv qhov kub qis.

• Kev qeb duas nqi ntawm peb yam khoom siv: FEP

• Tus yuam sij rau kev xaiv tsis yog "kev xaiv twg zoo dua," tab sis yog "qhov kev ua tau zoo twg yuav tsum tau muab qhov tseem ceeb raws li koj cov kev xav tau ua haujlwm."

PTFE, PFA, thiab FEP yog dab tsi?

Tag nrho peb yam khoom siv no yog los ntawm tsev neeg fluoropolymer thiab sib koom ua ke carbon-fluorine ua lawv lub hauv paus tseem ceeb. Txawm li cas los xij, qhov sib txawv ntawm cov atoms tseem ceeb no txiav txim siab lawv cov kev xav tau ua tiav thiab cov khoom siv lub cev. Kev nkag siab txog cov yam ntxwv tseem ceeb ntawm txhua yam khoom siv ua lub hauv paus rau kev txiav txim siab xaiv cov qauv.

PTFE (Polytetrafluoroethylene)

PTFE yog thawj fluoropolymer uas tau siv rau hauv kev lag luam, uas DuPont tau tshawb pom xyoo 1938; nws lub npe lag luam Teflon® txhais tau tias PTFE. Nws cov saw hlau molecular muaj cov pa roj carbon thiab fluorine atoms, tsis muaj sab lossis cov saw hlau branched - cov qauv no muab nws nrog kev tsis muaj zog tshuaj lom neeg thiab kev tiv taus kub, tab sis kuj ua rau nws tsis yaj rau kev ua tiav, tso cai rau tsuas yog extrusion lossis molding.

• Qhov kub ua haujlwm ntau yam:-65°C txog +260°C

• Zoo li: dawb mis nyuj

• Cov yam ntxwv: coefficient sib txhuam (0.11), tiv taus tshuaj lom neeg zoo heev, thiab cov khoom dielectric zoo heev

• Txoj kev ua: Tsis pub muab tshuaj nplaum extrusion lossis pwm compression sintering; txhaj tshuaj molding lossis kub-yaj vuam tsis raug tso cai.

Ntawm cov tiavPTFE raj, PTFE sawv cev rau pawg khoom uas muaj ntau yam tshaj plaws. Besteflon tsim txhua yam khoom—txij li 0.3 hli micro-diameter capillary tubes mus rau 50 hli loj-diameter industrial tubes—los ntawm cov txheej txheem extrusion.

PFA (Perfluoroalkoxy)

PFA qhia txog cov saw hlau perfluoroalkoxy rau ntawm PTFE molecular saw, ua rau nws muaj peev xwm ua tau yaj - muaj peev xwm txhaj tshuaj molding, vuam kub-yaj, thiab ua kom pom tseeb dua. Nws cov tshuaj tiv thaiv thiab kev ruaj khov kub yuav luag zoo ib yam li PTFE, txawm hais tias nws kim dua.

• Qhov kub ua haujlwm ntau yam: -200°C txog +260°C

• Zoo li: pob tshab me ntsis mus rau pob tshab

• Cov Khoom: Yaj tau rau kev ua tiav, weldable, ultra-high purity (low precipitation), pob tshab

• Cov txheej txheem ua: Extrusion, txhaj tshuaj molding, thiab hot-yaj welding yog siv tau.

PFA yog cov khoom siv txheem rau kev tsim cov khoom siv semiconductor thiab kev thauj cov kua dej uas muaj cov khoom huv si, vim nws muaj cov pob tshab thiab kev vuam tau zoo thaum tseem tswj tau qib PTFE uas tiv taus cov tshuaj lom neeg. Thaum saib xyuas cov xwm txheej ntawm cov kua dej hauv cov kav dej lossis vuam cov khoom siv yeeb nkab rau cov pob qij txha, PFA muab cov peev xwm uas PTFE tsis tuaj yeem sib piv.

FEP (Fluorinated Ethylene Propylene)

FEP yog ib qho copolymer ntawm PTFE thiab hexafluoropropylene, nrog-CF₃ sab pawg tau nkag mus rau hauv nws cov saw molecular. Cov qauv no ua rau FEP yog cov khoom siv ua tau zoo tshaj plaws ntawm peb yam - uas muaj qhov taw qhia qis dua, kev ua haujlwm zoo dua, nrog rau kev pom tseeb thiab kev ywj pheej zoo heev. Txawm li cas los xij, nws qhov kub siab tshaj plaws yog kwv yees li 60 ° C qis dua li PTFE thiab PFA.

• Qhov kub ua haujlwm ntau yam: -200°C txog +200°C

• Tsos: Pob tshab

• Cov yam ntxwv: Feem ntau pob tshab, yooj ywm tshaj plaws, tus nqi ua haujlwm qis tshaj plaws, thiab tsim nyog rau kev vuam kub-yaj

• Cov txheej txheem ua: extrusion, txhaj tshuaj molding, kub-yaj vuam

FEP yog qhov kev daws teeb meem pheej yig tshaj plaws thaum ua haujlwm yam tsis tas yuav kub txog li 260 ° C. Nws yog siv dav hauv cov kev pom kev ntws, cov txheej txheem thauj tshuaj lom neeg kub qis, thiab cov kav dej uas xav tau kev khoov lossis khoov.

PTFE vs PFA vs FEP: Kev Sib Piv 7-Qhov Ntev

Tam sim no cov lus txhais tau meej lawm, peb txav mus rau qhov tseem ceeb tshaj plaws ntawm kev xaiv cov khoom siv tiag tiag: piv ncaj qha rau peb cov khoom siv thoob plaws xya qhov tseem ceeb. Xya qhov kev ntsuas no sawv cev rau cov yam tseem ceeb uas cov pab pawg yuav khoom B2B xav txog thaum xaiv cov khoom siv, thiab kev hloov pauv hauv txhua qhov ntsuas tuaj yeem ua cov laj thawj txiav txim siab rau kev xaiv lossis tsis lees txais cov khoom siv tshwj xeeb.

 

Cov ntsiab lus tseem ceeb ntawm kev ntsuam xyuas:

• Yog tias koj xav tau 260°C, FEP tsis suav nrog; tsuas yog PTFE lossis PFA xwb thiaj li xaiv tau.

• Yog tias xav tau qhov pob tshab, PTFE tsis suav nrog; ob qho tib si PFA thiab FEP siv tau.

• Yog tias koj xav tau vuam cov kav dej, siv cov khoom rwb thaiv tsev PTFE

• Yog tias koj xav tau qhov zoo tshaj plaws ntawm epitaxial (qib semiconductor), PFA yog tib txoj kev xaiv xwb.

• Yog tias 200°C txaus thiab qhov nyiaj txiag yog qhov txhawj xeeb, FEP muab qhov sib piv zoo tshaj plaws ntawm tus nqi thiab kev ua tau zoo.

Cov Khoom Siv Twg Zoo Rau Koj Daim Ntawv Thov?

Ib daim ntawv sib piv dav dav tsuas yog qhia txog qhov sib txawv ntawm cov parameter thoob plaws qhov ntev, tab sis qhov tseem ceeb hauv kev xaiv tsis yog cov parameter lawv tus kheej - nws yog qhov kev ua tau zoo uas koj xav tau tiag tiag. Hauv qab no yog cov lus qhia xaiv tau uas tsim los rau cov xwm txheej tshwj xeeb hauv kev lag luam.

 

 

Cov Lus Qhia Txog Kev Tsim Khoom Rau Besteflon: Peb tsim cov khoom siv PTFE tubing tag nrho(PTFE capillary raj,PTFE du bore tube, PTFE convoluted tube). Yog tias koj tsis paub meej txog PTFE thiab PFA/FEP, tsuas yog muab koj cov kev xav tau ntawm daim ntawv thov thiab cov kev ua haujlwm rau peb. Peb cov engineers yuav soj ntsuam seb PTFE puas ua tau raws li koj xav tau - feem ntau, PTFE txaus, tshem tawm cov nqi tsis tsim nyog rau cov yam ntxwv uas koj yuav tsis siv.

Tsob Ntoo Txiav Txim Siab: PTFE, PFA, lossis FEP?

Cov lus sib piv thiab cov lus sib phim daim ntawv thov npog feem ntau cov xwm txheej, tab sis qee qhov project xav tau kev sib xyaw ua ke ntawm ob txoj hauv kev, ua rau muaj kev ntsuam xyuas zoo dua. Tsob ntoo txiav txim siab hauv qab no pab koj txiav txim siab cov kev xaiv ib kauj ruam zuj zus raws li cov kev txwv kev ua tau zoo tseem ceeb tshaj plaws.

 

Kauj Ruam 1 —Qhov yuav tsum tau ua kom tsis txhob kub

Puas yog koj lub cev qhov kub ua haujlwm siab tshaj plaws tshaj 200 ℃?

•YOG →Tshem tawm FEP thiab mus rau Kauj Ruam 2

• Tsis yog →Tag nrho peb yam khoom siv tau; mus rau Kauj Ruam 3

 

Kauj Ruam 2 — PTFE or PFA?

Koj puas xav tau pob tshab los yog kev vuam siv tau?

•Xav tau kev pom tseeb →Xaiv PFA

•Xav tau Kev vuam →Xaiv PFA

•Tsis muaj ib qho ntawm lawv xav tau. →Xaiv PTFE (Tus nqi tsim nyog dua thiab tiv taus tshuaj lom neeg zoo dua)

 

Kauj Ruam 3 —Xaiv ib qho ntawm peb

Koj muab qhov tseem ceeb tshaj plaws rau dab tsi?

•Kev tiv thaiv tshuaj lom neeg / Kev sib txhuam coefficient / Dielectric zog →Xaiv PTFE

•Kev Huv Si/Kev Vuam/Kev Pom Tseeb →Xaiv PFA

•Kev Pom Tseeb/Kev Ywj Pheej/Tus Nqi →Xaiv FEP

 

Tej Yam Tshwj Xeeb：

• Cov raj xa dej kho mob uas xav tau daim ntawv pov thawj USP Class VI→PTFE los yog PFA, nyob ntawm seb qhov nyuaj thiab pob tshab xav tau.

• xav tau kev ntshiab siab heev (qib semiconductor) → PFA

• Yuav tsum muaj cov qauv corrugated rau kev them nyiaj flexural.→ PTFE (Besteflon cov raj PTFE convoluted sawv cev rau cov kab khoom laus.)

• Cov peev nyiaj tsawg heev, tab sis 200℃ yuav txaus.→ FEP

 

Dab tsiatxog ePTFE thiab Teflon?

Thaum koj nrhiav cov khoom siv yeeb nkab fluoropolymer, tej zaum koj yuav ntsib ob lo lus uas feem ntau hais txog: ePTFE thiab Teflon. Lawv muaj kev sib raug zoo li cas rau peb yam khoom siv uas tau tham hauv tsab xov xwm no? Muaj lus piav qhia luv luv hauv qab no kom tsis txhob muaj kev tsis meej pem.

ePTFE vs PTFE

ePTFE (expanded polytetrafluoroethylene) yog ib hom PTFE uas tsim los ntawm kev ncab thiab nthuav dav, uas muaj cov qauv sab hauv me me. Txawm hais tias khaws cia PTFE cov tshuaj inertness, ePTFE ua rau muaj kev ua pa thiab qhov ceev qis heev, ua rau nws feem ntau siv rau gaskets (piv txwv li, Gore-Tex® sealing strips) thiab cov ntaub so ntswg ua pa tau, es tsis yog ua cov khoom siv raj. Thaum hais txog "ePTFE raj," nws feem ntau txhais tau tias yog PTFE yeeb nkab, txawm hais tias cov lus piav qhia no yuav tsis meej.

Teflon piv rau PTFE

Teflon® yog ib lub npe lag luam sau npe rau PTFE uas Chemours (yav tas los hu ua DuPont). Teflon sawv cev rau PTFE, ib yam li Kleenex sawv cev rau cov phuam ntawv. Txawm li cas los xij, hauv kev lag luam, "Teflon tubing" qee zaum siv hloov pauv nrog PFA lossis FEP tubing, vim Chemours kuj muag cov khoom PFA thiab FEP hauv qab Teflon® hom. Yog tias koj teev "Teflon tube" ntawm koj daim ntawv xaj yuav khoom, cov neeg muag khoom yuav nug seb koj xav tau hom twg - PTFE, PFA, lossis FEP. Yog xav paub ntxiv, saib peb tsab xov xwm ntxiv:PTFE vs Teflon: Puas Yog Lawv Cov Khoom Siv Ib Yam?

Cov Lus Nug Feem Ntau

Txog rau tam sim no, koj yuav tsum nkag siab meej txog qhov sib txawv ntawm peb cov ntaub ntawv no. Hauv qab no yog cov lus nug feem ntau uas cov neeg siv khoom nug thaum lub sijhawm xaiv - yog tias koj tseem tsis tau teb cov lus nug, thov hu rau Besteflon engineers ncaj qha rau kev pab sai.

Q: Puas yog PTFE thiab PFA zoo ib yam li ntawd hauv kev tiv taus tshuaj lom neeg?

A: Hauv feem ntau ntawm cov tshuaj lom neeg, qhov kev tiv thaiv tshuaj lom neeg ntawm ob qho khoom siv yuav luag zoo ib yam. Qhov sib txawv feem ntau pom tseeb hauv qab ob peb qhov xwm txheej hnyav: PFA ua rau muaj kev ruaj khov zoo dua me ntsis thaum raug rau qhov kub thiab txias thiab cov alkalis concentrated dhau sijhawm ntev, thaum PTFE ua rau muaj kev tiv thaiv nkag mus zoo dua hauv qab qhov kub thiab txias thiab siab. Rau 99% ntawm cov ntawv thov kev lag luam, lawv qhov kev tiv thaiv tshuaj lom neeg tuaj yeem suav tias sib npaug.

 

Q: Puas yog qhov txwv siab tshaj plaws rau FEP ntawm 200°C? Puas siv tau rau lub sijhawm luv luv uas kub dhau heev?

A: 200 ° C yog qhov kub siab tshaj plaws rau FEP. Txawm hais tias kev raug rau lub sijhawm luv luv (hauv ob peb teev) tuaj yeem tiv taus qhov kub ntawm 205–210 ° C, kev raug ntev tshaj 200 ° C ua rau cov khoom laus sai dua thiab txo cov khoom siv zog. Yog tias koj lub cev yuav muaj kev kub ntxhov ib ntus, nws raug pom zoo kom xaiv PTFE lossis PFA ncaj qha.

 

Q: Vim li cas PFA kim dua PTFE?

A: PFA muaj cov nqi khoom siv raw siab dua (vim yog tus nqi siab ntawm perfluoroalkyl vinyl ether copolymer monomers) thiab qhov kub ua haujlwm nqaim dua, ua rau cov nqi tsim khoom qis dua me ntsis; ntxiv rau, kev muab khoom lag luam yog tsom mus rau ob peb lub tuam txhab tsim tshuaj lom neeg. Yog tias koj tsis xav tau PFA cov txiaj ntsig tshwj xeeb - xws li pob tshab, weldability, lossis ultra-high purity - PTFE yog qhov kev xaiv pheej yig dua.

 

Q: Cov ntaub ntawv peb yam twg yooj yim tshaj plaws rau kev ua thiab kho kom haum?

A: FEP yog cov khoom siv zoo tshaj plaws - uas muaj qhov taw tes yaj qis thiab muaj kua zoo heev, zoo tagnrho rau kev rho tawm thiab txhaj tshuaj molding ntawm cov duab nyuaj. PFA los tom ntej, xav tau qhov kub ua haujlwm siab dua tab sis kuj fusible. PTFE yog qhov kev xaiv tsis tsim nyog tshaj plaws - nws tsuas yog tuaj yeem rho tawm ua ib qho nplaum lossis pwm los ntawm sintering, tsis tuaj yeem txhaj tshuaj-molded, thiab muab qhov yooj ywm qis tshaj plaws hauv kev tsim cov duab. Qhov no piav qhia vim li cas Besteflon's PTFE kev txiav txim siab yuav tsum tau tshuaj xyuas engineering: tsis yog txhua qhov kev qhia tshwj xeeb ua tau.

 

Q: Kuv qhov project xav tau daim ntawv pov thawj kho mob; puas yog peb yam khoom siv no tsim nyog?

A: Ob qho tib si PTFE thiab PFA tau tsim cov ntawv pov thawj kho mob (USP Class VI, ISO 10993), thaum FEP muaj tsawg dua cov ntawv thov kho mob. Qhov kev xaiv tshwj xeeb nyob ntawm qhov yuav tsum tau ua ntawm koj lub cuab yeej hais txog qhov nyuaj ntawm lub raj, pob tshab, thiab kev tiv taus kub.