Txij li thaum Dupont pib tsim PTFE nyob rau hauv 1945, nws tau 61 xyoo txij li thaum.Tam sim no ua ib yam khoom tseem ceeb ntawm PTFEPTFE microporous zaj duab xisyog siv dav, nthuav dav los ntawm kev siv tshuab hluav taws xob mus rau kev lag luam tsoos tsho, los ntawm kev lag luam kev lag luam mus rau petrochemical, hauv kev lag luam kev tiv thaiv ib puag ncig tuaj yeem siv tsis tau tsuas yog rau cov dej kho dej, tab sis kuj rau huab cua purification.Nws tuaj yeem hais tias nws daim ntawv thov ntau yam tseem yog qhov dav.
Cov yam ntxwv ntawm polytetrafluoroethylene
1. Molecular qauv yam ntxwv
2. Tshuaj stability
3. Cov khoom cua sov
4. Mechanical zog
5. Cov khoom siv hluav taws xob
6. Nto khoom
Kev loj hlob ntawm PTFE microporous zaj duab xis
Tam sim no, cov txheej txheem ntau lawm ntawmPTFE microporous zaj duab xismuaj calendering zaj duab xis txoj kev, tig zaj duab xis txoj kev thiab stretching zaj duab xis txoj kev.Stretch zaj duab xis txoj kev yuav muab faib ua ib-txoj kev stretch thiab ob-txoj kev stretch, los ntawm cov qauv kev tsom xam thiab kev ntsuas tiag, tsuas yog ob-txoj kev stretch zaj duab xis muaj zoo microporous qauv.Cov txheej txheem ntau lawm ntawm biaxially oriented PTFE microporous zaj duab xis yog qhia hauv daim duab.
Daim ntawv thov ntawm PTFE microporous zaj duab xis
1. Daim ntawv thov hauv cov ntaub ntawv pom
2. Kev siv hauv cov ntaub ntawv kho mob
Kev npaj ntawm PTFE zaj duab xis
1. Ua ntej txheej txheem ntawm PTFE microporous zaj duab xis
2. Cov txheej txheem npaj
3. Cov txheej txheem ntau lawm
Kev cuam tshuam ntawm kev ua haujlwm tsis ua haujlwm ntawm cov khoom ntawm PTFE films
Cov yam ntxwv cuam tshuam rau cov khoom ntawm PTFE microporous films nyob rau hauv cov txheej txheem biaxial stretching thiab nws cov txheej txheem ua ntej yog complex thiab multifaceted.Ntxiv nrog rau kev ua haujlwm ntawm cov cuab yeej ua haujlwm, qhov ntsuas kub thiab qhov ncab, lwm yam cuam tshuam yog: kev ua haujlwm kub, kev ua haujlwm av noo.
Kev khiav hauj lwm kub: PTFE films yog tshwj xeeb tshaj yog rhiab heev rau kub, thiab txawv kev khiav hauj lwm kub tuaj yeem ua rau cov khoom sib txawv.Qhov kub thiab txias yog qhov tseem ceeb ntawm kev ua haujlwm tsis yog hauv cov txheej txheem ncab xwb, tab sis kuj hauv PTFE resin ua thiab cov txheej txheem nruab nrab.
Kev Ua Haujlwm Humidity: Cov av noo yog qhov kub thiab txias thiab tsis tuaj yeem tham yam tsis muaj qhov kub thiab txias.Ambient humidity kuj muaj kev cuam tshuam rau zaj duab xis.
PTFE muaj kev ruaj ntseg tshuaj zoo heev, zoo heev thiab tsis kub kub kev ua tau zoo thiab corrosion kuj, thiab yog dav siv nyob rau hauv chemical, roj av, textile, electronics thiab mechanical industries.Lub caij no, cov khoom muaj zog hydrophobic thiab ntxeem tau ntawm PTFE ua rau nws yog ib qho zoo tshaj plaws membrane cov ntaub ntawv rau kev npaj ntawm waterproof thiab breathable textile fibers nrog rau cov membrane distillation thiab membrane contactors.Piv nrog rau lwm cov ntaub ntawv membrane, ePTFE daim nyias nyias yog tib daim nyias nyias uas yuav siv tau ruaj khov rau lub sij hawm ntev nrog siab loj hloov coefficient, thiab qhov zoo ntawm me me, muaj zog txhawb nqa tus kheej muaj peev xwm thiab siab loading ceev ntawm hollow fiber membranes. PTFE hollow fiber membranes nyiam ntau xim nyob rau hauv lub tshav pob ntawm daim nyias nyias contactors.
Porous PTFE hollow fiber membranes yog npaj los ntawm extrusion-kos txoj kev, thiab cov txheej txheem kev npaj muaj xws li sib tov, extrusion spinning, unidirectional stretching thiab sintering.Cov khoom sib xyaw PTFE tag nrho yog nias ua ntej ntawm lub xovxwm dawb los ua ib qho cylindrical dawb paug.Pre-pressed blanks yog extruded thiab spun ntawm 40-100 ° C.Tom qab degreasing, tshav kub-teeb kom tau PTFE hollow fiber membrane.Lub degreasing kub yog 200-340 ° C, qhov kub thiab txias yog 330-400 ° C, thiab lub sij hawm kub yog 45-500 s.Daim ntawv microscopic yog ib ncig (elliptical lossis ncig) pore qauv.
Post lub sij hawm: Jan-18-2022