Ua npuas ncauj yog ib hom polyurethane ua npuas ncauj yas, zwm rau cov noob polyurethane ua npuas dej. Vim nws cov honeycomb - zoo li cov qauv ntxig, elastic intance, thiab yog dav siv nyob rau hauv rooj tog, kev nqus dej, ntim khoom muag thiab lwm yam kev lag luam.
I. LUB KOOB RAW
1.1 polyether polyols
Ua npuas ncauj ntxig feem ntau siv polyether propylene glycol thiab polyether glycerol, uas muaj cov haujlwm tsawg (2-3), qhov hnyav hydroxyl thiab qhov hnyav. Cov mis molecular yog:
1.2 Organic Isocyanates
Feem ntau siv yog toluene diisocyanate, abbrient raws li TDI, uas muaj ob qho isomers, uas yog 2,4-tdi thiab 2,6-tdi. Nyob rau hauv kev tsim cov npuas dej nti, 2,4-TDI cov account rau 80% thiab 2,6-TDI cov account rau 20%.
1.3 Dej
Dej yog qhov tsis tseem ceeb hauv kev tsim cov tshuaj txia ua npuas ncauj. Nws reacts nrog TDI los tso Co2 roj thiab tseem ua lub luag haujlwm hauv txoj kev loj hlob.
1.4 catalysts
Catalysts uas txhawb nqa cov tshuaj tiv thaiv ntawm polyether polyols thiab isocyanates kom nce cov saw ntev ntev nrog cov khoom noj hauv qab zib thiab dibuyltin. Catalysts uas txhawb -} Cov tshuaj tiv thaiv CO2 thiab dej tso tawm ntawm cov tshuaj tiv thaiv CO2
1.5 tshuab cov khaub ncaws sab nraud
Feem ntau siv yog tsawg - boiling - Xws li Trichhlorofluoriathans (F {}} 11). Vim muaj kev txhawj xeeb ib puag ncig, cyclopentane feem ntau siv los hloov F-11, lossis Dichhloromethane, nrog cov txiaj ntsig zoo. Yog tias tsis tsim cov txheej txheem roj teeb ultra
1.6 ua npuas ncauj stabilizers
(Ua npuas ncauj cov neeg sawv cev tsis sib xws) yog cov accosilic ua npuas dej, feem ntau yog silicon bashers, nrog tshuaj copolymers, nrog kev noj tshuaj ntawm 0.5% mus rau 5%.