Raws li ib qho tseem ceeb additive rau polyurethane ua npuas ncauj ntaub ntawv, polyether-hloov silicone roj mas plays lub luag hauj lwm ntawm stabilizer thiab tseem hu ua homogenizing neeg sawv cev. Txawm hais tias nws siv hauv cov mis me me, feem ntau yog 0.5% rau 2.0% ntawm polyol, nws lub luag haujlwm tseem ceeb heev.
Plaub lub luag haujlwm tseem ceeb ntawm polyether-hloov silicone roj hauv polyurethane ua npuas ncauj ntau lawm:
Emulsification:
Nyob rau hauv thawj theem ntawm kev sib xyaw polyether polyol thiab isocyanate, vim tsis zoo solubility ntawm ob, pawg hydrophobic ntawm polyether-hloov silicone roj yog soluble nyob rau hauv isocyanate, thaum lub hydrophilic pab pawg neeg yog soluble nyob rau hauv polyether polyol, yog li nws muaj peev xwm ua tau zoo txhawb cov khoom. sib tov thiab emulsification ntawm ob, kom ntseeg tau tias cov tshuaj tiv thaiv pib sib npaug hauv lub cev.
Tsim thiab homogenize npuas:
Polyether-hloov silicone roj tuaj yeem txo qhov nro ntawm cov tshuaj tiv thaiv kab mob, kom cov huab cua tuaj yeem sib npaug mus rau hauv cov npuas zoo los ua npuas nuclei. Qhov no muab cov xwm txheej rau cov pa roj carbon dioxide thiab cov roj uas tsim los ntawm tus neeg sawv cev foaming kom nkag mus rau hauv cov npuas nucleus los tsim cov npuas, thiab qhov nro qis yog qhov tsim nyog rau kev loj hlob ntawm npuas.
Stabilize npuas:
Thaum lub kaw lus viscosity tsawg, cov npuas core kua zaj duab xis yog nyias thiab yooj yim tawg los ntawm cov kua dej, kev sib koom ua ke lossis kev cuam tshuam rau txhua yam. Polyether-hloov silicone roj txhim khu kev ruaj ntseg ntawm cov tub ntxhais npuas los ntawm Gibbs-Marangoni nyhuv, txo cov npuas phab ntsa to thiab merging. Tsis tas li ntawd, nws cov khoom tsis yog-ionic pab txo cov van der Waals quab yuam ntawm cov roj-kua interface thiab ntxiv stabilize cov npuas.
Txuas cov npuas:
Nyob rau theem kawg tsim ntawm cov ntaub ntawv polyurethane mos ua npuas ncauj, kev sib txuas ntawm cov tub ntxhais npuas yog qhov tseem ceeb. Thaum lub kaw lus viscosity tsawg, polyether-hloov silicone roj pab stabilize lub npuas core phab ntsa zaj duab xis thiab txhawb cov phab ntsa zaj duab xis kom ncav cuag qhov tseem ceeb qhib thickness, tsim tej yam kev mob rau qhov kawg qhib ntawm lub npuas core.