Hauv kev tsim cov ua npuas polyurethane, kev ua tiav cov qauv ua npuas xav tau, qhov ceev, thiab lub zog kho tshuab nyob ntawm ntau yam - ntawm lawv,kub ntawm cov khoom sivthiabqhov kub thiab txias ib puag ncigyog ob qho tseem ceeb tshaj plaws. Nkag siab txog seb cov ntsuas kub no cuam tshuam li cas raukev ua npuas dej polyurethaneyog qhov tseem ceeb rau kev tswj hwm qhov zoo sib xws, kev tsim khoom, thiab kev siv nyiaj tsim nyog.
1. Qhov Tseem Ceeb ntawm Kev Tswj Kub hauv Polyurethane Foaming
LubCov txheej txheem ua npuas dej polyurethanemuaj cov tshuaj lom neeg sib xyaw ua ke ntawm cov tshuaj exothermiccov polyols, cov isocyanates, dej, thiabcov tshuaj polyurethane catalystsCov tshuaj tiv thaiv no tsim cua sov, CO₂ roj, thiab thaum kawg tsim cov qauv ua npuas ncauj.
Ob leegkub ntawm cov khoom siv(qhov kub ntawm polyol thiab isocyanate ua ntej sib tov) thiabqhov kub thiab txias ib puag ncig(qhov chaw ib puag ncig thaum lub sijhawm ua npuas dej thiab kho) cuam tshuam ncaj qha rau qhov kev ua haujlwm ntawm cov tshuaj tiv thaiv, cov qauv ntawm lub cell, kev nce ntawm cov npuas dej, thiab cov yam ntxwv kho.
2. Cov nyhuv ntawm qhov kub ntawm cov khoom siv rau kev ua haujlwm ntawm cov ua npuas ncauj
Kev tswj hwm qhov tseebkub ntawm cov khoom sivnws yog qhov tseem ceeb ua ntej sib tov cov khoom sib xyaw.
- Kub ntawm cov khoom siv qis (<18°C)Thaum cov polyol lossis isocyanate txias dhau, qhov kev ua haujlwm yuav qeeb. Cov ua npuas dej yuav nce qeeb, qhia cov cell tsis sib npaug, lossis txawm tias tawg vim tsis ua haujlwm tiav. Cov ntaub ntawv txias kuj ua rau kom viscosity ntau ntxiv, ua rau kev sib tov tsis zoo thiab cov qauv ua npuas dej tsis sib xws.
- Kub ntawm cov khoom siv (> 25 ° C)Kev kub dhau ua rau cov tshuaj ua haujlwm sai dua, ua rau lub sijhawm ua kom qab zib thiab lub sijhawm nce sai dua. Qhov no tuaj yeem ua rau cov qauv cell ntxhib, qhov tsis zoo ntawm qhov chaw, thiab cov kab nrib pleb sab hauv ntawm cov ua npuas ncauj.
Rau feem ntaupolyurethane foaming systems, qhov pom zookub ntawm cov khoom sivntau yam yog20–25°Ckom ntseeg tau tias muaj kev sib tov sib xws, qhov nrawm zoo tshaj plaws, thiab kev ua npuas ruaj khov.
3. Kev cuam tshuam ntawm qhov kub thiab txias ntawm kev ua npuas dej thiab kev kho
Lubqhov kub thiab txias ib puag ncighauv thaj chaw tsim khoom kuj tseem ua lub luag haujlwm tseem ceeb hauvqhov zoo ntawm polyurethane ua npuas ncauj.
- Qhov kub thiab txias tsawg (<15°C)Kev poob cua sov rau ib puag ncig ua rau qeeb qeeb ntawm kev ua npuas dej, ua rau lub sijhawm tsis muaj tack thiab demolding ntev dua. Cov npuas dej yuav zoo li ntom dua thiab tawv dua vim yog CO₂ txo qis kev nthuav dav.
- Kub ib puag ncig siab (> 30 ° C)Kub dhau heev yuav ua rau cov gelling ua ntej lub sijhawm, nthuav dav tsis tiav, thiab qhib cov cell defects. Hauv kev siv tshuaj tsuag polyurethane ua npuas ncauj (SPF), qhov kub siab yuav ua rau lo tsis sib xws thiab tsis ruaj khov.
Ib lub chaw ruaj khovqhov kub thiab txias ib puag ncig ntawm 20–25°Cnrog cov av noo qis ua kom ntseeg tau tiaskev ua npuas dej polyurethanemus txuas ntxiv mus sib npaug zos thiab tias cov ua npuas ncauj kawg qhia txog qhov ceev thiab cov ntsiab lus kaw-cell.
4. Kev Sib Npaug Kub thiab Kev Xaiv Catalyst
Kev hloov pauv ntawm qhov kub thiab txias tsis yog tsuas yog cuam tshuam rau qhov ceev ntawm cov tshuaj lom neeg xwb tab sis kuj cuam tshuam rau kev ua haujlwm ntawmpolyurethane catalystCov tshuaj catalysts xws li tertiary amines thiab cov tshuaj organometallic tswj qhov sib npaug ntawmkev ua pa tshuab(dej-isocyanate) thiabkev ua kom gelling(polyol-isocyanate).
Thaum kub tsawg, qhov kev ua haujlwm qeeb qeeb, thiabcov tshuaj amine ua haujlwm siab(xws liMXC-A1los yog MXC-5) tuaj yeem them rau qhov kev ua haujlwm qis dua.
Thaum kub siab, ibcatalyst sib npaug lossis qeeb-ua haujlwm(xws liMXC-B20los yog MXC-TMA) tuaj yeem pab tswj kom qhov nce siab sib npaug thiab txo cov qhov tsis zoo ntawm qhov chaw.
Tsim nyogkev tswj kub ua ke nrog cov tshuaj polyurethane catalyst zooua kom muaj cov khoom ua npuas dej sib xws txawm tias nyob hauv qhov xwm txheej ib puag ncig sib txawv.
5. Cov Lus Qhia Siv Tau Rau Kev Tswj Kub Hauv Kev Tsim Khoom PU Ua Npuas Ncauj
- Ua kom cov ntaub ntawv sov ua ntejmus rau qhov zoo tshaj plaws (20-25 ° C) ua ntej sib tov.
- Tswj qhov kub thiab txias hauv chav kom ruaj khovnyob rau hauv thaj chaw ua npuas dej los ntawm kev tswj huab cua lossis rwb thaiv tsev.
- Tsis txhob hloov pauv kub sai saiuas ua rau tsis sib npaug ntawm cov npuas dej.
- Saib xyuas cov qauv tshuaj tiv thaivtsis tu ncua los kho cov tshuaj catalyst thaum qhov kub ntawm ib puag ncig sib txawv.
- Xyuas kom tseeb tias qhov chaw cia khoom zoontawm cov ntaub ntawv raw - tshwj xeeb tshaj yog isocyanates - los tiv thaiv kev nqus dej noo thiab kev hloov pauv viscosity.
6. Xaus Lus
Ob leegkub ntawm cov khoom sivthiabqhov kub thiab txias ib puag ncigyog cov yam ntxwv tseem ceeb uas cuam tshuam raupolyurethane ua npuas ncaujzoo. Kev tswj qhov kub kom zoo ua kom muaj kev ruaj khov ntawm cov tshuaj lom neeg, ua kom cov catalyst ua haujlwm tau zoo, thiab tsim cov ua npuas dej nrog qhov ceev sib xws, cov qauv cell sib xws, thiab cov khoom siv kho tshuab zoo dua.
At Mingxu Cov Khoom Tshiab, peb muab ntau yam khoom sivcov tshuaj polyurethane catalystsoptimized rau ntau yam kub thiab cov qauv ua npuas ncauj. Txawm koj tsim khoom los xijcov ua npuas polyurethane uas tawv, yoog tau, lossis txau, peb cov tshuaj catalysts uas tsis muaj pa phem, tsis muaj ntxhiab tsw qab muab kev ua tau zoo thiab pab koj tswj cov khoom zoo hauv qab txhua qhov chaw tsim khoom.
Lub sijhawm tshaj tawm: Lub Kaum Hli-15-2025