Admixtures ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov kev ua tau zoo ntawm lub tsev qhuav-colleded. Cov tshuaj xyuas cov khoom hauv qab no thiab sib piv cov khoom yooj yim ntawm cov hmoov yas thiab ntsuas qhov kev ua tau zoo ntawm cov khoom lag luam qhuav-qhuav.
Redispersible looj hmoov
Redispersible looj hmoovyog ua tiav los ntawm cov tshuaj tsuag kom qhuav ntawm cov polymer tshwj xeeb emulsion. Cov hmoov qhuav qhuav yog qee qhov sib npaug ntawm 80 ~ 100mm tau sib sau ua ke. Cov lus no yog soluble hauv dej thiab tsim ib qho ruaj khov me ntsis loj dua li cov thawj emulsion cov lus, uas ua ib zaj duab xis tom qab lub cev qhuav dej thiab ziab.
Kev ntsuas kev hloov kho txawv ua rau cov redispersible looj cov khoom xws li dej tsis kam, huab cua tsis kam thiab hloov tau. Cov hmoov yas tau siv hauv kev sib xyaw ua ke tau txhim kho qhov cuam tshuam, hluav taws xob tsis kam, cov tshuaj tua hluav taws, khoov zog ntawm lub zog ntawm lub tshuaj khib.
Cellulose ether
Cellulose ether yog ib lo lus dav dav rau cov khoom lag luam uas tsim los ntawm cov tshuaj tiv thaiv ntawm alkali cellulose thiab tus sawv cev rau qee yam. Alkali cellulose yog hloov los ntawm cov neeg sawv cev sib txawv kom tau txais cov kws muaj kev sib txawv cellulose. Raws li Ionization cov yam ntxwv ntawm cov neeg tuaj lwm tus neeg cellulose tuaj yeem muab faib ua ob pawg: ionic (xws li methyl cellulose). Raws li hom hloov chaw, ether ether tuaj yeem faib ua monether (xws li hydrothpropyl methyl cellulose). Raws li txawvfility solubility, nws tuaj yeem faib ua dej-solible (xws li cellulose cellulose (xws li cellulle cellulose, thiab dej-soluble cellulose yog Faib rau hauv cov hom tseem ceeb thiab qhov muag tau kho kom tsawg dua.
Lub tshuab ntawm kev ua ntawm cellulose ether hauv cug tshuaj yog raws li hauv qab no:
(1) Tom qabCellulose etherNyob rau hauv lub tshuaj khib nyiab yog yaj hauv dej, qhov ua tau zoo thiab kev faib khoom noj khoom haus etheried, thiab cov cellule dolid, "qhwv cov khoom" thiab txheej txheej ntawm lubricating zaj duab xis Yog tsim ntawm nws sab nraud, uas ua rau cov tshuaj cug lub kaw lus ntau ruaj khov, thiab tseem txhim kho cov fluab ntawm lub tshuaj khib thaum ua kev tsim kho.
(2) Vim nws tus kheej cov qauv molecular, lub cellulose cov tshuaj ua kom yooj yim kom tsis yooj yim rau lub sijhawm ntev, ua kom huv cov tshuaj khib nyiab nrog cov dej zoo thiab ua haujlwm.
ntoo fiber ntau
Ntoo fiber yog ua los ntawm cov nroj tsuag raws li cov khoom siv raw thiab ua tiav los ntawm cov thev naus laus zis, thiab nws cov kev ua tau zoo sib txawv ntawm cov cellulose ether. Cov khoom tseem ceeb yog:
(1) Insoluble hauv dej thiab cov kuab tshuaj, thiab tseem tsis tau muaj nyob hauv cov kua qaub tsis muaj zog
(2) siv rau hauv cov tshuaj khib, nws yuav sib tshooj rau hauv lub xeev peb sab, nce lub thatic lub xeev, nce lub thatic lub cug, thiab txhim kho cov kev tsim kho kom zoo nkauj.
(3) Vim yog peb-txoj kev sib txawv ntawm cov ntoo muaj roj, nws muaj cov khoom siv ntawm "dej sib xyaw" thiab cov dej hauv cug tshuaj yuav tsis yooj yim nqus lossis tshem tawm. Tab sis nws tsis muaj dej siab tuav ntawm cellulose ether.
(4) Cov kab mob zoo ntawm cov ntoo muaj zog muaj cov kev ua haujlwm ntawm cov kab tshuaj khib nyiab ntawm lub cug, yog li txo cov kab nrib pleb tshwm sim los ntawm qhov tsis sib thooj.
(5) Ntoo fiber muaj peev xwm txo qhov kev ntxhov siab ntawm cov khib nyiab thiab cov tawv tawv thiab tawg ntawm cov tshuaj khib.
Lub Sijhawm Post: Apr-25-2024