RPTFE (hloov polytetrafluoroethylene) cov ntsaws ruaj ruaj siv hauv cov petrochemical, thiab lwm thaj chaw vim lawv cov tshuaj lom neeg ua tau zoo, thiab kub ntau yam. Cov txheej txheem ntau lawm yuav tsum tau tswj cov tsis tswj ntawm txhua kauj ruam los xyuas kom meej cov khoom lag luam.
Cov khoom siv raw ua ntu zus yog thawj kauj ruam. Lub PTFE daim pib muab sib xyaw nrog cov fiber xws li carbon fiber thiab iav hlaws dai nyob rau hauv cov profortions tsim nyog thiab tusyees}}}}}}} nrawm dua. Tus muab tub lim cov ntsiab lus yog feem ntau tswj tau ntawm 15% thiab 30% kom ua tiav qhov sib npaug ntawm cov tshuab muaj zog thiab kev ua tau zoo. Cov khoom siv tau qhuav yog qhuav hauv qhov ntsuas kub tsis tu ncua thaum 80-100℃rau 2-4 teev kom tshem tawm cov dej noo thiab tiv thaiv cov khoom xyaw tsis xws luag.
Compression Moulding siv tau ob -}}} Cov kauj ruam kauj ruam: txias nias thiab sintering. Lub pre {-} Cov khoom siv kho tau muab tso rau hauv cov pwm thiab ua ntej} {mpa kom ntom ntawm 1.8-2.0 g / cm³. Nws yog tom qab ntawd pauv mus rau ib qho sintering rauv rau qib kawm me me: thiab tom qab ntawd maj mam txias rau chav kub dhau 10-12 teev kom zam dhau kev ntxhov siab uas yuav ua rau tawg.
Tshaj tawm - kev ua yog qhov tseem ceeb heev. Sintered seem yog precision - phoo ntawv} Cov kev kho deg ib feem ntau cuam tshuam nrog graphite lossis molybdenum disulfide los txo cov coefficient ntawm kev txhuam mus rau 0.1-0.15. Qee cov khoom xav tau kev thov cov cai thov kom ntshav kuj tseem yuav tsum ua kom cov kev kho ntshav yuav ua kom muaj zog thiab txhim kho kev sib khi.
Kev tswj hwm zoo yog siv thoob plaws tag nrho cov txheej txheem. Txhua tus batch undergoes qhov kev sim ntsuas ntom (ntau dua lossis sib npaug ntawm 2.1 g / cm³<1×10⁻⁹mbar·L/s). Special applications also require cyclic testing from -200°C to 260°C and immersion in acid and alkaline media for verification.
Cov txheej txheem no ua ke thev naus laus zis nrog cov khoom siv tshuab hluav taws xob ntawm cov tshuaj lom neeg ua ke nrog cov tshuaj lom neeg ua ke ntawm cov khoom siv hluav taws xob sib xyaw ua ke hauv kev xav tau kev ua haujlwm.
