Cellulose ether yog non-ionic semi-synthetic polymer, uas yog dej-soluble thiab hnyav-soluble. Nws muaj cov teebmeem sib txawv hauv kev lag luam sib txawv. Piv txwv li, hauv cov khoom siv tshuaj lom neeg, nws muaj cov teebmeem hauv qab no:
① Dej tuav tus neeg saib xyuas, ②Thickener, ③Leveling khoom, ④Film forming property, ⑤Binder
Hauv kev lag luam polyvinyl chloride, nws yog emulsifier thiab dispersant; nyob rau hauv kev lag luam kws tshuaj, nws yog ib tug binder thiab ib tug qeeb thiab tswj cov ntaub ntawv tso tawm lub moj khaum, thiab lwm yam. Vim hais tias cellulose muaj ib tug ntau yam ntawm composite cov teebmeem, nws daim ntawv thov ntawm lub teb kuj yog feem ntau nws kim heev. Tom ntej no, kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
hauv latex xim
Hauv kev lag luam latex xim, xaiv hydroxyethyl cellulose, cov ntsiab lus dav dav ntawm qhov sib npaug ntawm cov viscosity yog 30000-50000cps, uas sib haum rau cov lus qhia ntawm HBR250, thiab qhov siv ntau npaum li cas yog 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog ua kom tuab, tiv thaiv cov gelation ntawm cov xim, pab kev tawg ntawm cov xim, kev ruaj ntseg ntawm cov latex, thiab ua kom cov viscosity ntawm cov khoom, uas ua rau kom muaj kev ua tau zoo ntawm kev tsim kho: Hydroxyethyl cellulose yog yooj yim dua los siv. Nws tuaj yeem yaj hauv dej txias thiab dej kub, thiab nws tsis cuam tshuam los ntawm tus nqi pH. Nws tuaj yeem siv tau zoo ntawm PI tus nqi 2 thiab 12. Cov txheej txheem ntawm kev siv yog raws li hauv qab no:
I. Ntxiv ncaj qha rau hauv ntau lawm
Rau txoj kev no, hydroxyethyl cellulose ncua hom yuav tsum tau xaiv, thiab hydroxyethyl cellulose nrog lub sij hawm tawg ntawm ntau tshaj 30 feeb yog siv. Cov kauj ruam yog raws li nram no: ① Muab ib tug npaum li cas ntawm cov dej ntshiab nyob rau hauv ib lub thawv uas muaj ib tug high-shear agitator ② Pib stirring tsis tu ncua ntawm qhov ceev, thiab nyob rau tib lub sij hawm maj mam ntxiv cov hydroxyethyl pab pawg neeg rau hauv cov tshuaj sib npaug ③ Txuas ntxiv mus kom txog rau thaum tag nrho cov ntaub ntawv granular yog soaked ④Ntxiv lwm yam additives thiab yooj yim additives, thiab lwm yam. ⑤ Do kom txog thaum tag nrho cov hydroxyethyl pawg yog yaj tag, tom qab ntawd ntxiv lwm cov khoom xyaw hauv cov mis thiab zom kom txog thaum cov khoom tiav.
2. Nruab nrog niam cawv rau tom qab siv
Txoj kev no tuaj yeem xaiv hom instant, thiab muaj cov nyhuv anti-mildew cellulose. Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim latex. Txoj kev npaj yog tib yam li cov kauj ruam ①-④.
3. Ua rau porridge siv tom qab
Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo (insoluble) rau hydroxyethyl, cov kuab tshuaj no tuaj yeem siv los tsim cov porridge. Feem ntau siv cov kuab tshuaj organic yog cov kua organic hauv cov xim pleev xim, xws li ethylene glycol, propylene glycol, thiab cov neeg ua yeeb yaj kiab (xws li diethylene glycol butyl acetate). Cov porridge hydroxyethyl cellulose tuaj yeem ncaj qha ntxiv rau cov xim. Txuas ntxiv mus kom txog thaum yaj tag.
hauv putty
Tam sim no, nyob rau hauv ntau lub nroog hauv kuv lub teb chaws, cov dej-resistant thiab txhuam-resistant ib puag ncig-phooj ywg putty tau pib muaj nuj nqis los ntawm tib neeg. Nws yog tsim los ntawm acetal cov tshuaj tiv thaiv ntawm vinyl cawv thiab formaldehyde. Yog li ntawd, cov khoom no maj mam tshem tawm los ntawm tib neeg, thiab cov khoom siv cellulose ether yog siv los hloov cov khoom siv no. Qhov ntawd yog hais tias, rau kev tsim cov khoom siv hauv tsev, cellulose yog tam sim no tsuas yog cov khoom siv.
Nyob rau hauv dej-resistant putty, nws muab faib ua ob hom: qhuav hmoov putty thiab putty muab tshuaj txhuam. Ntawm ob hom putty, methyl cellulose thiab hydroxypropyl methyl yuav tsum raug xaiv. Lub viscosity specification feem ntau yog nyob nruab nrab ntawm 40000-75000cps. Lub luag haujlwm tseem ceeb ntawm cellulose yog dej tuav, sib txuas thiab lubrication.
Txij li cov qauv putty ntawm ntau lub tuam txhab sib txawv, qee qhov yog cov calcium grey, lub teeb calcium, cov cement dawb, thiab lwm yam, thiab qee qhov yog gypsum hmoov, grey calcium, lub teeb calcium, thiab lwm yam, yog li cov specifications, viscosity thiab nkag mus ntawm cellulose nyob rau hauv lub ob tug qauv kuj txawv. Tus nqi ntxiv yog li 2‰-3‰.
Post lub sij hawm: Feb-04-2023