Polyurethane ua npuas ncauj yog ib cov khoom tseem ceeb hauv cov ntoo yooj yim, muab cov rwb thaiv tsev zoo, cov qauv kev ruaj ntseg thiab ua hluav taws xob ruaj khov. Sandwich panels muaj feem ntau hauv kev tsim kho cov tsev, chaw ntim khoom txias thiab muaj cov khoom siv txias thiab cov khoom siv hluav taws xob ruaj khov thiab hnav khaub ncaws polyurethane ua npuas dej. Cov tub ntxhais yog ua los ntawm polyurethane rigid ua npuas ncauj thiab muaj txiaj ntsig zoo rau cov kev ua tau zoo ntawm thermal ntawm thermal rwb thaiv tsev, hluav taws kub tiv thaiv thiab cov qauv kev ncaj ncees. Qhov zoo ntawm cov laj thawj ua npuas no yog nyob ntawm polyurethane catalyst siv nyob rau hauv nws cov khoom lag luam.
Polyurethane catalysts ua lub luag haujlwm tseem ceeb hauv cov tshuaj lom neeg cov tshuaj lom neeg hloov polyols thiab isocyanates rau hauv ua npuas ncauj txhav. Cov catalysts ua kom nrawm nrawm ua npuas ncauj thiab kho cov txheej txheem, kom muaj kev sib xyaw ntawm cov qauv ntawm tes ntawm tes, kom ua tiav lub cev kom zoo. Ib qho catalyst yogMXC -15, Potassium octoate daws (CAS {{{3164-85-0), uas yog qhov siab hloov dua siab tshiab, nqi-ua tau zoo entocyanurate catalystate. Nws yog tshwj xeeb rau siab viscosity polyol formulations thiab muaj peev xwm txhawb nqa ownocyanate cov tshuaj tiv thaiv.
Daim Ntawv Thov nyob rau hauv Sandwich Panels
Cov polyurethane ua npuas ncauj tub ntxhais nyob rau hauv Sandwich huam yuav tsum ua raws li cov qauv tshwj xeeb kom ntseeg tau tias tau ua haujlwm zoo. Piv txwv li, cov npaus yuav tsum yog lub teeb yuag txawm muaj zog txaus kom tiv taus Countavive compressive compression thiab muab thermal rwb thaiv tsev. Ib qho ntxiv, hauv qee cov ntawv thov, xws li txias cia lossis kev lag luam txias, kev tiv thaiv hluav taws kub yog qhov tseem ceeb. MXC -15 yog reasly reashly thiab pab daim ntawv polyisocyanurate (PIR) ua npuas ncauj, ua rau lawv zoo tagnrho rau cov ntawv thov.
PIR foams muaj cov nyiaj ua haujlwm hauv isocyanurate dua li cov pa roj polyurethane ua npuas dej, muab rau lawv tiv thaiv hluav taws kub heev. MXC -15 txhawb kev tsim ntawm cov nyiaj ntawm no, kom ua npuas ncauj kom kawg cov khoom siv tau rau cov xuab zeb. Qhov no ua rau cov tshuab ua npuas xab npaus txhawb nqa los ntawmMXC -15Ib qho kev xaiv nrov rau cov vaj huam sib luag uas yuav tsum tau ua raws li cov qauv tua hluav taws nruj me ntsis.
Cuam tshuam rau cov khoom lag luam zoo
Kev xaiv ntawm catalyst muaj qhov cuam tshuam tseem ceeb ntawm qhov zoo ntawm cov sandwich vaj huam sib luag ua npuas. Catalysts zoo li MXC -15} Ua kom pom kev ua npuas zoo thiab tswj cov qauv ua npuas ncauj ntau dua. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv kev tsim cov qhaandwich panels, raws li kev sib tw ntawm cov pa hluav taws xob thiab cov tshuab hluav taws xob muaj zog ntawm cov sandwich vaj huam sib luag. Cov qauv zoo polyurethane ua npuas ncauj ua npuas nrog cov catalysts yog txo qis hloov cua sov, txhim kho cov kev ua kom muaj zog thiab ntev ntev ntawm cov xuab zeb.
Ib qho ntxiv, siv cov catalys nquag xws li MXC -15 tuaj yeem tsim cov npuas tsis muaj kev cuam tshuam tsawg. Cov tswj hwm sawv thiab gelation profile txo qis ntawm cov voids lossis cov ntsiab lus tsis muaj zog hauv cov qauv txheej txheem ntawm cov sandwich vaj huam sib luag. Tsis tas li ntawd, MXC -15 yog haum rau high-viscosity polyol formulations, ua kom muaj ntau yam kev xaiv rau cov tuam ntxhab tab tom tsim txiaj.
Hauv cov ntsiab lus, polyurethane catalysts xws li mxc {0}}} Ncaws lub luag haujlwm hauv Sandwich tshwj xeeb yog cov khoom siv npuas. Lawv cov kev cuam tshuam rau cov ua npuas ncauj zoo, cov khoom siv hluav taws xob ua hluav taws xob thiab cov hluav taws tsis tuaj yeem tsis tuaj yeem xav tsis thoob. Los ntawm kev xaiv cov catalyst txoj cai, cov tuam ntxhab tuaj yeem tsim cov sandwich panels uas tau ua tiav cov qauv sanded uas tau ua tiav cov qauv kev nyab xeeb thiab kev xaiv kev nyab xeeb rau ntau yam kev tsim kho thiab kev siv khoom lag luam.
