Polyurethane ua npuas ncauj ruaj khovyog siv dav hauv cov ntaub ntawv rwb thaiv tsev, cov khoom siv tub yees, cov vaj huam sib luag hauv tsev, cov tshuaj tsuag ua npuas ncauj, thiab cov vaj huam sib luag sandwich vim nws cov khoom rwb thaiv tsev zoo heev thiab cov khoom siv kho tshuab. Txawm li cas los xij, hauv kev tsim khoom lag luam, ib qho ntawm cov teeb meem feem ntau uas cov tuam txhab tsim khoom ntsib yogqeeb qeeb ntawm cov polyurethane ua npuas ncaujKev kho qeeb qeeb tsis yog tsuas yog txo qhov ua tau zoo ntawm kev tsim khoom xwb tab sis kuj tseem cuam tshuam rau qhov zoo ntawm ua npuas ncauj, kev ruaj khov ntawm qhov ntev, thiab kev nplaum.
Hauv tsab xov xwm no, peb yuav tshawb nrhiav txogCov laj thawj tseem ceeb ntawm kev kho qeeb hauv polyurethane ua npuas ncaujthiab muabcov kev daws teeb meem uas siv taurau cov chaw tsim khoom.
Cov Ua Rau Kom Qhuav Qeeb Hauv Polyurethane Rigid Foam
1. Kev Xaiv Polyurethane Catalyst Tsis Zoo
Lub polyurethane catalyst ua lub luag haujlwm tseem ceeb hauv kev sib npaug ntawmkev ua npuas ncauj(dej + isocyanate → CO₂) thiab covkev ua kom gelling(polyol + isocyanate → urethane). Yog tias lub kaw lus catalyst tsis raug xaiv kom raug lossis cov tshuaj tsis txaus, qhov ceev ntawm kev kho yuav qeeb.
- Cov tshuaj amine catalystsfeem ntau tswj cov tshuaj tiv thaiv foaming.
- Cov tshuaj catalysts hlau (xws li tin thiab potassium ntsev) ua kom cov txheej txheem gelling thiab curing sai dua.
Kev tsis sib npaug ntawm ob qho no tuaj yeem ua rau muaj kev phom sijqeeb qeeb ntawm cov ua npuas ncauj khov kho.
2. Kub thiab txias tsawg los yog kub nyoos
Cov tshuaj tiv thaiv polyurethane nyob ntawm qhov kub thiab txias heev. Yog tias qhov kub thiab txias ib puag ncig lossis qhov kub ntawm cov khoom siv raw qis dhau, qhov kev ua tshuaj tiv thaiv yuav txo qis, ua rau lub sijhawm kho ntev dua.
3. Cov Ntsuas Isocyanate Tsis Yog
Yuav tsum tau tswj kom zoo zoo seb tus isocyanate index (NCO/OH ratio). Yog tus index qis ces yuav ua rau tsis sib txuas zoo thiab ua kom nws qhuav qeeb dua. Tiam sis, tus index siab heev yuav ua rau nws tawg yooj yim tab sis feem ntau yuav ua rau nws qhuav sai dua.
4. Muaj Dej Ntau Dhau Hauv Lub System
Dej yog ib yam khoom siv uas siv los ua kom cov npuas dej tawg hauv cov tshuab ua npuas polyurethane. Txawm li cas los xij, dej ntau dhau ua rau CO₂ tsim ntau ntxiv, ua rau cov npuas dej qhuav qeeb, thiab ua rau cov npuas dej tawg lossis cov khoom sib faib tsis sib npaug.
5. Cov Khoom Ntxiv lossis Cov Tshuaj Surfactants Tsis Sib Xws
Kev sib raug zoo tsis zoocov tshuaj surfactants, cov tshuaj tiv thaiv hluav taws, lossis lwm yam khoom ntxiv nrog cov polyol systems yuav cuam tshuam qhov kev sib npaug ntawm kev kho, ua rauqeeb qeeb tawvthiab cov qauv ua npuas dej tsis zoo.
Cov Kev Daws Teeb Meem Los Txhim Kho Qhov Ceev Ntawm Polyurethane Rigid Foam
1. Txhim kho Catalyst System
- Xaivcov tshuaj polyurethane sib npauguas ua kom ob qho tib si ua npuas ncauj thiab gelling mus raws li qhov nrawm.
- Ua kecov tshuaj amine catalystsnrogcov tshuaj catalysts hlau(xws li dibutyltin dilaurate, potassium octanoate, lossis tertiary amines) kom ua tiav kev kho kom zoo ib yam thiab tswj tau.
- Kho cov tshuaj catalyst raws li qhov kub thiab cov qauv.
2. Tswj Kev Ua Kub
- Ua kom cov khoom siv raw sov rau qhov kub ua tiav raws li qhov pom zoo (feem ntau yog 20–25 ° C).
- Tswj kom muaj huab cua hauv chaw ua haujlwm kom haum.
3. Kho qhov ntsuas Isocyanate
- Kho qhov sib piv ntawm NCO/OH kom sib npaug rau kev ua haujlwm thiab kev ua npuas dej.
- Ua cov kev sim me me ua ntej kev tsim khoom loj kom tsis txhob muaj teeb meem zoo.
4. Tswj Cov Dej Muaj pes tsawg
- Khaws cov dej hauv cov qauv pom zoo.
- Tsis txhob ntxiv dej ntau dhau uas yuav ua rau qeeb qeeb thiab cuam tshuam rau kev ruaj khov ntawm cov ua npuas ncauj.
5. Xyuas kom meej tias cov khoom sib xws
- Xaivcov tshuaj silicone surfactants zoouas ua kom cov qauv ntawm lub cell ruaj khov thiab txhim kho kev kho kom zoo.
- Siv cov tshuaj tiv thaiv hluav taws thiab cov khoom sau uas tsis cuam tshuam rau cov tshuaj polyurethane.
Xaus lus
Lubqeeb qeeb ntawm cov polyurethane ua npuas ncaujfeem ntau yog vim xaiv cov catalyst tsis raug, kub qis, isocyanate index tsis raug, dej ntau dhau, lossis tsis sib haum xeeb ntawm cov khoom ntxiv. Los ntawm kev ua tib zookev ua kom zoo dua ntawm cov txheej txheem catalyst, tswj cov txheej txheem ua haujlwm, thiab xaiv cov khoom ntxiv uas sib xws, cov chaw tsim khoom tuaj yeem txhim kho qhov ceev ntawm kev kho, qhov zoo ntawm ua npuas ncauj, thiab kev ua haujlwm zoo ntawm kev tsim khoom.
At Mingxu Cov Khoom Tshiab, peb tau tshwj xeeb hauvkev tsim cov khoom ua npuas polyurethanetau ntau tshaj 20 xyoo. Peb muabcov tshuaj polyurethane catalysts, surfactants, thiab kev taw qhia txog kev ua haujlwmlos pab cov neeg siv khoom daws cov teeb meem hauv kev tsim ua npuas ncauj.
Peb zoo siab tos txais cov neeg koom tes hauv kev lag luam lossib pauv tswv yim, kawm ntawm ib leeg, thiab pab ua ke rau kev txhim kho kev lag luam polyurethane rigid foam.
Lub sijhawm tshaj tawm: Cuaj hlis-10-2025