Cellulose ether yog tsis-ionic semi-hluav taws xob semi-hluavtaws polymer, uas yog dej-soluble thiab cov kuab-soluble. Nws muaj cov teebmeem sib txawv hauv kev lag luam sib txawv. Piv txwv li, hauv cov khoom siv hauv tsev, nws muaj cov teebmeem hauv qab no:
①Wwater khaws tus neeg sawv cev, cov neeg siv zog, ntawm cov khoom ntiag tug, ④film txoj kev ua vaj tse, ⑤binder
Hauv kev lag luam polyvinyl chloride kev lag luam, nws yog emulsifier thiab dispersant; Hauv kev lag luam kws tshuaj, nws yog lub binder thiab muab tso tawm qeeb thiab tshuaj xyuas lub moj khaum, nws daim ntawv thov lub teb tseem yog qhov ntau tshaj plaws. Tom ntej no, Kuv yuav tsom rau kev siv thiab ua haujlwm ntawm cellulose ether hauv ntau cov ntaub ntawv hauv tsev.
Hauv cov xim pleev xim
Hauv kev lag luam latex kev lag luam, los xaiv hydroxyethyl cellulose, qhov tseeb ntawm cov viscosity yog 30000000000, thiab cov kev siv tshuaj rau cov lus qhia muaj peev xwm ntawm HBR250, thiab cov ntaub ntawv siv tshuaj lom zem yog feem ntau txog 1.5 ‰ -2 ‰. Lub ntsiab muaj nuj nqi ntawm hydroxyethyl hauv looj xim yog txhawm rau txhawm rau txhawm rau ntawm cov xim ntawm cov khoom siv, thiab nce viscing kev ua haujlwm ntawm kev tsim kho: Hydroxyethyl cellulose yog qhov yooj yim dua los siv. Nws tuaj yeem raug ntiab tawm hauv dej txias thiab dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi PH. Nws tuaj yeem siv kev nyab xeeb ntawm PI tus nqi 2 thiab 12. Cov hau kev ntawm kev siv yog raws li hauv qab no:
I. Ntxiv rau hauv ntau lawm
Rau cov qauv no, hydroxyethyl cellulose qeeb hom yuav tsum tau xaiv, thiab hydroxyethyl cellulose nrog lub sijhawm sib cais ntawm ntau tshaj 30 feeb yog siv. Cov kauj ruam muaj raws li hauv qab no: ① muab ib qho dej ntshiab nyob rau hauv cov pab pawg ceev, thiab tib lub sijhawm maj mam ntxiv rau cov kev daws teeb meem zoo li cov tshuaj kom txog thaum Tag nrho cov ntaub ntawv gran yog soaked ④add lwm cov kev ntxiv thiab lwm yam yooj yim, tom qab ntawd ntxiv lwm cov khoom hauv cov mis thiab zom kom txog thaum cov khoom tiav.
2. Nruab nrog niam cawv rau kev siv tom qab
Txoj kev no tuaj yeem xaiv hom tseem ceeb, thiab muaj cov tshuaj tiv thaiv cov txiaj ntsig ntawm cellulose. Qhov zoo dua ntawm txoj kev no yog tias nws tau muaj kev yoog tau zoo dua thiab tuaj yeem txuas ntxiv mus rau cov xim looj. Txoj kev npaj npaj yog tib yam li cov kauj ruam ①-④.
3. Ua rau nws mus rau hauv porridge rau tom qab siv
Txij li thaum Organic cov kuab tshuaj yog cov kuab tshuaj tsis zoo (insoluble) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los ua cov porridge. Feem ntau siv cov kuab tshuaj organic yog cov ethylene ua kua, xws li diylene glycol, thiab zaj duab xis-ua cov neeg sawv cev (xws li diethylene glyyl acetate). Cov porridge hydrothethyl cellulose tuaj yeem txuas ncaj qha ntxiv rau cov xim. Txuas ntxiv mus rau kom txog thaum yaj tag.
Hauv putty
Tam sim no, nyob hauv ntau lub nroog hauv kuv lub tebchaws, cov dej-tiv taus thiab txhuam-resistant ib puag ncig-phooj ywg putty tau muaj txiaj ntsig los ntawm cov neeg. Nws yog tsim los ntawm acetal cov tshuaj tiv thaiv ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov ntaub ntawv no maj mam muab tshem tawm los ntawm cov neeg, thiab lub cellulose siv ether series yog siv los hloov cov khoom no. Uas yog hais, rau kev txhim kho cov ntaub ntawv ua kom zoo hauv tsev, cellulose yog tam sim no yog cov khoom siv xwb.
Nyob rau hauv cov dej-resistant putty, nws tau muab faib ua ob hom: qhuav hmoov putty thiab putical muab tshuaj txhuam. Ntawm cov ob hom ntawm putty, methyl cellulose thiab hydroxypropyl yuav tsum tau xaiv. Lub viscosity specification feem ntau ntawm 40000-75000cps. Lub zog tseem ceeb ntawm cellulose yog dej cia, tsevneeg thiab lubrication.
Txij li cov qauv putty ntawm ntau cov tuam ntxhab sib txawv, qee qhov grey calcium, dawb xis mas, thiab lwm yam. ob daim qauv kuj sib txawv. Tus nqi ntxiv yog hais txog 2 ‰ -3 ‰.
Lub sijhawm Post: Feb-04-2023