Lub Rooj Tswjhwm Sandwich yog ib yam khoom siv hauv tsev uas muaj peb txheej: ob txheej sab nraud (lossis cov khoom tiav) thiab ib txheej hauv nruab nrab. Ib qho ntawm cov khoom siv txheej hauv paus feem ntau yog polyurethane (PU) ua npuas ncauj, uas muaj cov khoom rwb thaiv tsev zoo heev thiab kev txhawb nqa cov qauv. Cov txheej hauv paus feem ntau yog sandwiched ntawm cov khoom tiav khov kho, uas feem ntau yog ua los ntawm hlau, yas, lossis cov khoom sib xyaw ua ke uas muaj fiber ntau uas ua rau lub vaj huam sib luag muaj zog thiab ruaj khov. Cov khoom tseem ceeb hauv kev tsim cov txheej polyurethane ua npuas ncauj ua haujlwm siab rau cov vaj huam sib luag sandwich yog polyurethane catalysts, xws li MXC-15 thiab MXC-37.
Vim li cas thiaj ua npuas ncauj Polyurethane?
Cov polyurethane ua npuas ncauj cores yog siv dav hauv cov sandwich panels rau lawv cov nqi rwb thaiv tsev zoo heev (tus nqi R-siab), qhov sib dua, thiab kev txhawb nqa cov qauv. Cov vaj huam sib luag no feem ntau siv rau hauv cov lag luam uas qhov rwb thaiv tsev thermal thiab kev ua kom ruaj khov ntawm cov qauv yog qhov tseem ceeb, xws li:
- Kev Tsim Kho: Cov ntaub ntawv tseem ceeb muab kev rwb thaiv tsev zoo heev, ua rau cov tsev siv hluav taws xob tsawg dua. Piv txwv li, thaum peb ua haujlwm rau lub chaw cia khoom txias, cov vaj huam sib luag sandwich uas rwb thaiv tsev tau txo cov nqi hluav taws xob los ntawm kev tswj qhov kub thiab txias tas li.
- Kev Txias thiab Kev Khaws Cia Khoom TxiasHauv cov chaw cia khoom txias, cov nqi rwb thaiv tsev siab yog qhov tseem ceeb rau kev tswj qhov kub thiab txias qis.Qhov tsis kam hloov pauv cua sov ntawm polyurethane ua npuas ncauj ua rau nws yog qhov kev xaiv dav rau chav txias thiab cov tub yees.
- Kev Ua Haujlwm Aerospace thiab MarineHauv kev siv dav hlau thiab kev siv hauv dej hiav txwv, qhov sib npaug ntawm qhov hnyav thiab lub zog yog qhov tseem ceeb heev. Cov vaj huam sib luag sandwich nrog PU ua npuas ncauj muab kev txhawb nqa cov qauv tsim nyog thaum txo qhov hnyav.
Lub Luag Haujlwm ntawmCov tshuaj Polyurethane Catalysts
Cov tshuaj polyurethane catalysts, xws li MXC-15 thiab MXC-37, yog qhov tseem ceeb hauv kev ua npuas ncauj thaum lub sijhawm tsim cov polyurethane ua npuas ncauj cores. Cov tshuaj catalysts no ua kom cov tshuaj tiv thaiv ntawm polyol thiab isocyanate sai dua, ua rau muaj cov npuas ncauj ruaj khov nrog cov yam ntxwv xav tau.
MXC-15: Nws yog ib qho tshuaj catalyst isocyanurate uas pheej yig thiab ua haujlwm tau zoo nrog tus nqi hloov pauv siab. Haum rau cov qauv polyol viscosity siab, txhawb kev ua haujlwm isocyanate, kev ua haujlwm siab, feem ntau yog siv rau PU ua npuas ncauj nyuaj, suav nrog cov tshuaj tsuag ua npuas ncauj, PIR ua npuas ncauj, PIR ua npuas ncauj system.
MXC-37: Kuj hu ua DMAEE, ntxiv DMAEE rau hauv cov polymer txo qhov tsw ntawm amine uas feem ntau pom muaj nyob rau hauv cov ua npuas dej. Nws tuaj yeem siv ua tus catalyst tseem ceeb ib leeg lossis ua tus cocatalyst los txo qhov kev siv BDMAEE ua npuas dej catalysts. Rau ester raws li stabilizers mos ua npuas dej, microcellular ua npuas dej, elastomer, RIM thiab RRIM, thiab cov ntawv thov ntim khoom ua npuas dej khov kho.
Cov txiaj ntsig ntawm Polyurethane Ua Npuas Ncauj hauv Sandwich Panels
- Kev Rwb Thaiv Zoo Tshaj Plaws (R-Tus Nqi): Ua npuas dej Polyurethane muaj ib qho ntawm cov nqi R-nqi siab tshaj plaws ib nti piv rau lwm cov ntaub ntawv rwb thaiv tsev. Qhov no ua rau cov vaj huam sib luag sandwich nrog PU ua npuas dej cores txuag hluav taws xob heev.
- Sib dua thiab ruaj khov: Cov pob zeb ua npuas ncauj PU txo qhov hnyav tag nrho ntawm lub vaj huam sib luag sandwich yam tsis muaj kev cuam tshuam rau lub zog, ua rau lawv zoo tagnrho rau cov ntawv thov uas qhov hnyav txo qis yog qhov tseem ceeb.
- Dej noo thiab Hluav Taws Kub Tiv Thaiv: Ua npuas dej polyurethane tuaj yeem tsim nrog cov khoom ntxiv los txhim kho kev tiv thaiv hluav taws thiab kev tiv thaiv dej noo, txhim kho kev nyab xeeb thiab lub neej ntev ntawm cov sandwich panels hauv ntau qhov chaw ib puag ncig.
- Kev Kho Kom Haum thiab Lub ZogLos ntawm kev kho cov qauv thiab cov catalysts, cov chaw tsim khoom tuaj yeem tsim cov ua npuas ncauj nrog ntau qhov sib txawv thiab cov khoom siv kho tshuab, tso cai rau cov sandwich panels kom ua tau raws li cov kev xav tau tshwj xeeb.
Xaus lus
Cov tshuaj polyurethane catalysts xws li MXC-15 thiab MXC-37 yog qhov tseem ceeb hauv kev tsim cov polyurethane ua npuas ncauj ua haujlwm siab rau cov vaj huam sib luag sandwich. Cov tshuaj catalysts no ua kom ntseeg tau tias cov ua npuas ncauj ua tau raws li cov lus qhia xav tau, xws li tus nqi rwb thaiv tsev siab, lub zog ntawm cov qauv, thiab kev ruaj khov. Kev hloov pauv ntawm polyurethane ua npuas ncauj, ua ke nrog qhov tseeb ntawm cov tshuaj catalysts niaj hnub no, tau ua rau nws qhov chaw hauv kev lag luam xws li kev tsim kho mus rau kev tub yees, tsheb, thiab aerospace. Nrog kev tsim kho tshiab hauv cov tshuaj catalyst, cov chaw tsim khoom tuaj yeem txuas ntxiv txhim kho kev ua tau zoo thiab kev ruaj khov ntawm cov vaj huam sib luag sandwich.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-12-2024