Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov kua ob - Cov khoom siv ua npuas ncauj siv feem ntau yog tsim los ntawm cov khoom siv (Isocyanate Cheebtsam) thiab cov khoom siv B (Polyol tivthaiv). Tom qab sib tov, ob feem cuam tshuam los ua npuas dej. Cov hauv qab no yog qhov kev tshawb fawb tshwj xeeb:
1.Cov phoojywg (ISOCYANATE tivthaiv)
• Cov Cheebtsam tseem ceeb: polyisocyanates, feem ntau yog toluene diisocyanate (tdi) thiab daihenylmethanate (MDI), ntxiv rau Polymeric MDI (Papi).
• Ua haujlwm: Ua "tus neeg sawv cev ntawm cov tshuaj tiv thaiv" ntawm cov tshuaj tiv thaiv hydrogen uas nquag ua rau muaj cov qauv ua npuas ncauj.
2.
Muaj ntau yam ntawm cov khoom uas koom nrog cov tshuaj tiv thaiv thiab tswj cov khoom npuas dej:
• Polyols: xws li Polyether Polyol thiab Polyester Polyol, uas muab cov pab pawg ntawm lub hauv paus ntawm cov tub rog ua npuas ncauj.
• Ua npuas ncauj tus neeg sawv cev: tsim cov roj kom nthuav cov sib tov thiab daim ntawv npuas fubbles. Cov neeg sawv cev ntawm lub cev cov tshuaj tiv thaiv kev ua npuas dej (piv txwv li, cov neeg sawv cev ua npuas ncauj) thiab cov tshuaj lom neeg, uas yooj yim los tsim cov roj carbon dioxide).
• Cov tshuaj catalyst: ua kom nrawm dua cov tshuaj tiv thaiv, xws li cov tshuaj tua kab mob amine) thiab cov tshuaj tiv thaiv ua ke) thiab orgototin catalyst (txhawb nqa gel cov tshuaj tivthaiv).
• Surfactants: ruaj khov tus qauv ua npuas ncauj thiab tiv thaiv kom npuas los ntawm bursting. Lawv feem ntau yog cov pobxebane sib xyaw.
• Lwm cov kev sib ntxiv: xws li nplaim taws retardants, fillers, colorants, uas yog ntxiv raws li cov nplaim taws, thiab lwm yam khoom ntawm foam.
3.Reition hauv paus ntsiab lus
Thaum cov khoom siv A thiab B yog sib xyaw, the {Au cov pab pawg ntawm polyols thiab dej, tso roj (foaming) los ua cov khoom siv ua npuas ncauj. Cov kev sib piv thiab cov khoom siv tshwj xeeb txiav txim siab ua npuas ncauj, Hardness, thermal rwb thaiv tsev zog, thiab lwm yam ntxwv. Cov khoom siv no muaj ntau cov ntaub pua uas nrhiav tau cov kev siv rwb thaiv tsev, ntim cov rooj tog zaum, thiab kev lag luam.
