Cov roj hmab Nitrile butadiene (NBR) thiab polyvinyl chloride (PVC) yog ob yam khoom siv dav hauv kev lag luam rwb thaiv tsev, tshwj xeeb tshaj yog hauv kev siv hluav taws xob thiab thermal. Lawv cov yam ntxwv tshwj xeeb ua rau lawv haum rau ntau yam ib puag ncig, tab sis kev ua tau zoo ntawm cov ntaub ntawv rwb thaiv tsev no tuaj yeem sib txawv ntau nyob ntawm cov txheej txheem tsim khoom. Kev nkag siab txog qhov cuam tshuam ntawm ntau txoj kev tsim khoom rau kev ua tau zoo ntawm cov ntaub ntawv NBR / PVC yog qhov tseem ceeb rau cov chaw tsim khoom thiab cov neeg siv kawg.
Cov khoom siv rwb thaiv tsev ntawm NBR/PVC feem ntau nyob ntawm lawv cov thermal conductivity, dielectric strength, thiab kev kam rau cov yam ntxwv ib puag ncig xws li av noo thiab qhov kub thiab txias hloov pauv. Cov khoom no raug cuam tshuam los ntawm cov qauv khoom siv, cov khoom ntxiv, thiab cov txheej txheem tshwj xeeb siv hauv kev tsim khoom.
Ib qho ntawm cov txheej txheem tsim khoom tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm cov khoom rwb thaiv tsev yog txoj kev sib xyaw ua ke. Hauv theem no, cov polymers hauv paus (nitrile roj hmab thiab polyvinyl chloride) raug sib xyaw nrog ntau yam khoom ntxiv, suav nrog cov yas ua kom ruaj khov, cov khoom ruaj khov, thiab cov khoom sau. Kev xaiv cov khoom ntxiv thiab lawv qhov kev sib xyaw ua rau hloov pauv cov khoom siv thermal thiab hluav taws xob ntawm cov khoom kawg. Piv txwv li, kev ntxiv qee cov yas ua kom yooj ywm thiab txo cov khoom siv thermal, thaum cov khoom sau tshwj xeeb tuaj yeem txhim kho lub zog kho tshuab thiab kev ruaj khov thermal.
Lwm txoj kev tsim khoom tseem ceeb yog txoj kev extrusion lossis molding uas siv los ua cov khoom siv rwb thaiv tsev. Extrusion cuam tshuam nrog kev nias cov khoom sib xyaw los ntawm lub pwm kom ua ib daim duab tas mus li, thaum molding cuam tshuam nrog kev nchuav cov khoom rau hauv lub qhov uas tau tsim ua ntej. Txhua txoj kev ua rau muaj qhov sib txawv ntawm qhov ceev, kev sib xws, thiab tag nrho cov qauv ntawm cov khoom siv rwb thaiv tsev. Piv txwv li, cov khoom siv rwb thaiv tsev NBR/PVC uas tau extruded yuav muaj kev sib xws zoo dua thiab porosity qis dua piv rau cov khoom pwm, yog li txhim kho lawv cov kev ua haujlwm rwb thaiv tsev.
Cov txheej txheem kho ua lub luag haujlwm tseem ceeb hauv cov khoom siv rwb thaiv tsev ntawm cov roj hmab nitrile / polyvinyl chloride (NBR / PVC). Kev kho, tseem hu ua vulcanization, hais txog cov txheej txheem ntawm kev sib txuas polymer saw hlau los ntawm kev siv cua sov thiab siab, ua rau cov khoom ruaj khov dua thiab ruaj khov. Lub sijhawm thiab qhov kub ntawm cov txheej txheem kho cuam tshuam rau cov khoom kawg ntawm cov khoom siv rwb thaiv tsev. Kev kho tsis txaus ua rau kev sib txuas tsis tiav, yog li txo qhov kev tiv thaiv thermal thiab dielectric lub zog. Ntawm qhov tod tes, kev kho ntau dhau ua rau cov khoom siv ua brittle thiab tawg, yog li txo nws cov txiaj ntsig rwb thaiv tsev.
Ntxiv mus, qhov txias tom qab tsim khoom cuam tshuam rau qhov crystallinity thiab morphology ntawm NBR / PVC cov ntaub ntawv. Kev txias sai sai yuav ua rau muaj kev nce ntxiv hauv cov qauv amorphous, uas tuaj yeem txhim kho kev ywj pheej tab sis yuav txo qhov thermal stability. Ntawm qhov tod tes, qhov txias qeeb dua tuaj yeem txhawb kev crystallization, uas yuav txhim kho kev tiv thaiv cua sov tab sis ntawm tus nqi ntawm kev ywj pheej.
Hauv ib lo lus, cov khoom siv rwb thaiv tsev ntawm NBR/PVC cov ntaub ntawv raug cuam tshuam loj heev los ntawm ntau yam txheej txheem tsim khoom. Txij li kev sib xyaw thiab molding mus rau kev kho thiab txias, txhua kauj ruam hauv cov txheej txheem tsim khoom hloov pauv cov khoom siv thermal thiab hluav taws xob ntawm cov khoom kawg. Cov chaw tsim khoom yuav tsum xav txog cov yam no kom zoo dua qhov kev ua tau zoo ntawm cov khoom siv rwb thaiv tsev ntawm NBR/PVC rau cov ntawv thov tshwj xeeb. Nrog rau kev loj hlob ntawm kev thov rau cov ntaub ntawv rwb thaiv tsev ua haujlwm siab, kev tshawb fawb thiab kev txhim kho cov thev naus laus zis tsim khoom yog qhov tseem ceeb rau kev txhim kho kev ua tau zoo ntawm NBR/PVC cov kev daws teeb meem rwb thaiv tsev hauv ntau qhov chaw ib puag ncig.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-11-2025
