Ua npuas dej polyurethane yog ib yam khoom tseem ceeb hauv cov vaj huam sib luag sandwich, muab kev rwb thaiv tsev zoo heev, kev ruaj khov ntawm cov qauv thiab kev ua haujlwm thermal zoo. Cov vaj huam sib luag sandwich feem ntau siv rau hauv kev tsim kho vaj tse, cov chaw cia khoom txias thiab cov qauv kev lag luam, thiab muaj ob txheej nyias nyias ntawm cov khoom siv ruaj khov thiab lub plawv polyurethane ua npuas dej sib dua. Lub plawv yog ua los ntawm polyurethane ua npuas dej ruaj khov thiab pab txhawb rau kev ua haujlwm tag nrho ntawm lub vaj huam sib luag hauv kev rwb thaiv tsev thermal, kev tiv thaiv hluav taws thiab kev ua haujlwm zoo. Qhov zoo ntawm lub plawv ua npuas dej no nyob ntawm cov tshuaj polyurethane catalyst siv hauv nws cov khoom.
Cov tshuaj polyurethane catalysts ua lub luag haujlwm tseem ceeb hauv cov tshuaj lom neeg uas hloov cov polyols thiab isocyanates mus ua npuas ncauj. Cov tshuaj catalysts no ua kom cov txheej txheem ua npuas ncauj thiab kho sai dua, ua kom cov qauv cell zoo ib yam, lo rau zoo thiab cov khoom zoo tshaj plaws. Ib qho tshuaj catalyst zoo li no yogMXC-15, ib qho kua potassium octoate (CAS 3164-85-0), uas yog ib qho kev hloov pauv siab, cov tshuaj catalyst isocyanurate uas pheej yig. Nws yog qhov tshwj xeeb tshaj yog rau cov qauv polyol viscosity siab thiab tuaj yeem txhawb nqa cov tshuaj tiv thaiv isocyanate.
Daim ntawv thov hauv Sandwich Panels
Lub plawv polyurethane ua npuas ncauj hauv cov vaj huam sib luag sandwich yuav tsum ua tau raws li cov qauv tshwj xeeb kom ntseeg tau tias lub vaj huam sib luag ua haujlwm tau zoo. Piv txwv li, lub ua npuas ncauj yuav tsum tsis hnyav tab sis muaj zog txaus los tiv taus lub zog compressive thiab muab kev rwb thaiv tsev thermal. Tsis tas li ntawd, hauv qee qhov kev siv, xws li kev khaws cia txias lossis kev tub yees hauv kev lag luam, kev tiv thaiv hluav taws yog qhov tseem ceeb.MXC-15muaj zog heev thiab pab tsim cov polyisocyanurate (PIR) ua npuas dej, paub txog lawv qhov kev tiv thaiv hluav taws zoo dua, ua rau lawv zoo tagnrho rau cov ntawv thov zoo li no.
Cov ua npuas dej PIR muaj cov isocyanurate bonds ntau dua li cov ua npuas dej polyurethane ib txwm muaj, ua rau lawv tiv taus hluav taws zoo heev. MXC-15 txhawb nqa kev tsim cov bonds no, ua kom ntseeg tau tias cov ua npuas dej kawg muaj cov yam ntxwv uas xav tau rau cov vaj huam sib luag sandwich. Qhov no ua rau cov txheej txheem ua npuas dej PIR uas MXC-15 txhawb nqa yog qhov kev xaiv nrov rau cov vaj huam sib luag uas yuav tsum ua raws li cov qauv hluav taws nruj.
Kev Cuam Tshuam Rau Qhov Zoo ntawm Khoom
Kev xaiv cov tshuaj catalyst muaj feem cuam tshuam loj heev rau qhov zoo ntawm lub sandwich panel ua npuas ncauj. Cov tshuaj catalysts zoo li MXC-15 ua kom muaj kev ua npuas ncauj du thiab tswj tau, ua rau muaj cov qauv ua npuas ncauj sib xws dua. Qhov no tseem ceeb heev hauv kev tsim cov sandwich panels, vim tias qhov sib npaug ntawm cov npuas ncauj ceev thiab qhov loj ntawm lub cell cuam tshuam rau cov khoom rwb thaiv tsev thermal thiab lub zog kho tshuab ntawm sandwich panel. Cov ua npuas ncauj polyurethane zoo ua ke nrog cov tshuaj catalysts zoo tuaj yeem txo qhov hloov pauv cua sov, txhim kho kev ua haujlwm rwb thaiv tsev thiab lub neej ntev ntawm cov sandwich panels.
Tsis tas li ntawd xwb, kev siv cov tshuaj catalysts uas muaj zog heev xws li MXC-15 tuaj yeem tsim cov ua npuas ncauj uas muaj qhov tsis zoo tsawg heev. Qhov kev tswj hwm qhov nce thiab gelation profile txo qhov yuav muaj qhov khoob lossis qhov tsis muaj zog hauv cov ua npuas ncauj, ua kom ntseeg tau tias cov qauv ntawm lub vaj huam sib luag sandwich muaj kev ruaj khov. Tsis tas li ntawd xwb, MXC-15 yog qhov tsim nyog rau cov qauv polyol siab viscosity, ua kom sib xws nrog ntau yam qauv, ua rau nws yog qhov kev xaiv ntau yam rau cov tuam txhab tsim khoom uas tab tom nrhiav kev ua kom zoo dua lawv cov txheej txheem tsim vaj huam sib luag.
Hauv kev xaus lus, cov tshuaj polyurethane catalysts xws li MXC-15 ua lub luag haujlwm tseem ceeb hauv kev tsim cov vaj huam sib luag sandwich, tshwj xeeb tshaj yog hauv kev tsim cov PIR ua npuas ncauj cores. Lawv qhov cuam tshuam rau qhov zoo ntawm cov ua npuas ncauj, cov khoom thermal thiab kev tiv thaiv hluav taws tsis tuaj yeem raug kwv yees qis. Los ntawm kev xaiv cov tshuaj catalyst zoo, cov chaw tsim khoom tuaj yeem tsim cov vaj huam sib luag sandwich uas ua tau raws li cov qauv kev ua tau zoo thiab kev nyab xeeb, ua rau lawv yog qhov kev xaiv dav rau ntau yam kev tsim kho thiab kev siv hauv kev lag luam.
Lub sijhawm tshaj tawm: Lub Ib Hlis-06-2025