Cov khoom vitamin yog txhua yam los ntawm cov paj rwb ntuj lossis cov ntoo pulp, uas yog tsim los ntawm etherification. Cov khoom cellulose sib txawv siv cov neeg sawv cev etherifying sib txawv. Tus neeg sawv cev etherifying siv hauv hydroxyethyl cellulose (HEC) yog ethylene oxide, thiab tus neeg sawv cev etherifying siv hauv hydroxypropyl methylcellulose (HPMC) yog lwm hom neeg sawv cev etherifying. (chloromethane thiab propylene oxide).
Hauv cov xim pleev xim tiag tiag thiab cov xim latex, hydroxyethyl cellulose tuaj yeem siv los ua cov khoom tuab.
Xim pob zeb tiag tiag yooj yim rau kev sib xyaw vim nws muaj ntau cov khoom sib xyaw thiab qhov tshwj xeeb loj. Nws yog qhov tsim nyog los ntxiv cov khoom ua kom tuab kom ua rau nws cov viscosity kom tau raws li qhov xav tau rau kev txau thaum lub sijhawm tsim kho, txhim kho nws qhov ruaj khov, thiab ua tiav qee lub zog.
Yog tias koj xav tau cov xim pob zeb tiag tiag kom ua tiav lub zog zoo, tiv taus dej zoo thiab tiv taus huab cua, kev xaiv cov khoom siv raw thiab kev tsim cov mis yog qhov tseem ceeb heev.
Nyob rau hauv ib txwm muaj xwm txheej, qhov ntau ntawm cov emulsion siv rau hauv cov xim pob zeb zoo tiag tiag yuav siab dua.
Piv txwv li, hauv ib tuj ntawm cov xim pob zeb tiag tiag, tej zaum yuav muaj 300kg ntawm cov acrylic emulsion ntshiab thiab 650kg ntawm cov xuab zeb xim ntuj. Thaum cov khoom khov ntawm cov emulsion yog 50%, qhov ntim ntawm 300kg ntawm emulsion tom qab ziab yog li 150 litres, thiab qhov ntim ntawm 650kg ntawm xuab zeb yog li 228 litres. Uas yog hais tias, PVC (pigment ntim concentration) ntawm cov xim pob zeb tiag tiag yog 60% lub sijhawm no, vim tias cov khoom me me ntawm cov xuab zeb xim loj thiab tsis sib xws, thiab nyob rau hauv qhov xwm txheej ntawm qee qhov kev faib tawm qhov loj me, cov xim pob zeb tiag tiag qhuav yuav nyob hauv CPVC (qhov tseem ceeb ntawm qhov hnyav concentration). Pigment ntim concentration) kwv yees li. Raws li qhov thickener txhawj xeeb, yog tias koj xaiv cellulose nrog viscosity tsim nyog, cov xim pob zeb tiag tiag tuaj yeem tsim cov xim zaj duab xis tiav thiab ntom kom tau raws li peb qhov kev ua tau zoo tseem ceeb ntawm cov xim pob zeb tiag tiag. Yog tias cov ntsiab lus ntawm cov xim pob zeb tiag tiag emulsion qis, nws raug pom zoo kom siv cellulose nrog viscosity siab dua ua cov thickener (xws li 100,000 viscosity), tshwj xeeb tshaj yog tom qab tus nqi ntawm cellulose nce, uas tuaj yeem txo qhov ntau ntawm cellulose siv thiab ua rau cov pob zeb tiag tiag. Kev ua tau zoo ntawm cov xim zoo dua.
Qee cov chaw tsim xim pob zeb tiag tiag siv hydroxypropyl methylcellulose es tsis txhob siv hydroxyethyl cellulose rau tus nqi thiab lwm yam.
Piv nrog ob hom cellulose, hydroxyethyl cellulose muaj cov dej zoo dua, yuav tsis poob dej vim gelatin ntawm qhov kub siab, thiab muaj qee yam tiv taus pwm. Rau kev txiav txim siab txog kev ua tau zoo, nws raug pom zoo kom siv hydroxyethyl cellulose nrog viscosity ntawm 100,000 ua cov khoom tuab rau cov xim pob zeb tiag.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2023