Qib khoom siv hauv tsevcellulose etheryog ib qho tshuaj lom neeg tseem ceeb, uas siv dav hauv cov ntaub ntawv tsim kho, xws li cement, concrete, dry mortar, thiab lwm yam.
1. Cov qauv tshuaj lom neeg thiab kev faib tawm
Cellulose ether yog ib qho polymer compound tsim los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. Nws cov khoom tseem ceeb yog pawg hydroxyl ntawm cellulose hloov kho los ntawm tus neeg sawv cev etherifying (xws li vinyl chloride, acetic acid, thiab lwm yam). Raws li cov pab pawg etherifying sib txawv, nws tuaj yeem muab faib ua ntau hom cellulose ethers, feem ntau suav nrog hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC) thiab methyl cellulose (MC).
2. Kev khaws dej
Cov khoom siv hauv tsev qib cellulose ether muaj cov yam ntxwv zoo heev rau kev khaws dej, uas tuaj yeem txhim kho lub peev xwm khaws dej ntawm cov mortar thiab cov pob zeb. Qhov no ua rau cov khoom siv ua haujlwm tau zoo dua thaum lub sijhawm tsim kho thiab txo qhov tawg thiab lub zog poob los ntawm dej evaporation.
3. Ua kom tuab
Cellulose ether muaj cov khoom ua kom tuab zoo, uas tuaj yeem txhim kho qhov fluidity thiab viscosity ntawm cov ntaub ntawv tsim kho, ua rau lawv yooj yim dua rau kev ua haujlwm thaum lub sijhawm tsim kho. Kev ua kom tuab pab txhim kho kev ruaj khov ntawm cov ntaub ntawv thiab tiv thaiv kev faib ua pawg thiab kev tso dej tawm.
4. Kev txo dej
Mus txog qee yam,cov cellulose etherstuaj yeem txo cov dej hauv cov pob zeb ua vaj tse lossis cov av nplaum, yog li txhim kho lub zog thiab kev ruaj khov ntawm cov khoom siv. Qhov no ua rau nws tseem ceeb tshwj xeeb hauv kev siv cov pob zeb ua vaj tse ua haujlwm siab.
5. Kev ua tau zoo ntawm kev tsim kho
Cov ntaub ntawv siv cellulose ethers ua lub tsev ua haujlwm tau zoo dua thaum lub sijhawm tsim kho, uas tuaj yeem ua rau lub sijhawm tsim kho ntev dua thiab txo cov teeb meem tsim kho uas tshwm sim los ntawm kev ziab. Tsis tas li ntawd, lawv kuj tseem tuaj yeem txhim kho qhov kev nplaum ntawm cov mortar thiab txhim kho qhov kev nplaum ntawm cov ntaub ntawv txheej.
6. Kev tiv thaiv tawg
Cov cellulose ethers tuaj yeem txhim kho qhov tsis kam ntawm cov mortar thiab concrete thiab txo cov kab nrib pleb los ntawm kev hloov pauv kub lossis kev qhuav shrinkage. Qhov no yog qhov tseem ceeb rau kev ruaj khov mus sij hawm ntev thiab kev zoo nkauj ntawm cov tsev.
7. Kev hloov kho tau thiab kev sib haum xeeb
Cov khoom siv hauv tsev qib cellulose ethers muaj kev sib raug zoo nrog ntau yam khoom siv hauv tsev thiab tuaj yeem sib xyaw nrog cement, gypsum, polymers thiab lwm yam khoom xyaw yam tsis cuam tshuam rau lawv cov kev ua tau zoo. Qhov kev hloov pauv no ua rau cellulose ethers siv dav hauv kev lag luam kev tsim kho.
8. Kev tiv thaiv ib puag ncig
Vim tias cov khoom siv raw ntawmcov cellulose ethersyog los ntawm cov nroj tsuag fibers, lawv tus kheej muaj qee yam kev tiv thaiv ib puag ncig. Piv nrog rau qee cov polymers hluavtaws, cellulose ether yog tus phooj ywg zoo rau ib puag ncig hauv kev siv thiab kev kho pov tseg.
9. Cov teb thov
Cov khoom siv hauv tsev qib cellulose ether yog siv dav hauv ntau yam khoom siv hauv tsev, suav nrog:
Cov tshuaj khib qhuav: xws li cov tshuaj khib sib txuas, cov tshuaj khib plastering, thiab lwm yam.
Cov pob zeb ua vaj tse: tshwj xeeb tshaj yog cov pob zeb ua tau zoo heev.
Txheej: siv tau rau cov txheej txheem sab hauv thiab sab nraud ntawm phab ntsa, xim latex, thiab lwm yam.
Cov khoom siv gypsum: xws li gypsum board thiab gypsum putty.
10. Cov Lus Ceeb Toom rau Kev Siv
Thaum siv cov khoom siv hauv tsev qib cellulose ether, koj yuav tsum tau them sai sai rau cov ntsiab lus hauv qab no:
Ntxiv raws li qhov piv txwv pom zoo, ntau dhau lossis tsis txaus yuav cuam tshuam rau qhov kev ua tau zoo kawg.
Xyuas kom meej tias nws sib npaug thaum lub sijhawm sib tov kom tsis txhob muaj kev sib xyaw ua ke.
Thaum khaws cia, them sai sai rau cov dej noo-pov thawj kom tsis txhob muaj dej noo thiab agglomeration.
Cov khoom siv hauv tsev cellulose ether tau dhau los ua cov khoom siv tseem ceeb hauv kev lag luam khoom siv hauv tsev vim nws cov yam ntxwv tshwj xeeb thiab kev siv tau dav. Nrog rau kev txhim kho tas mus li ntawm kev lag luam kev tsim kho cov kev xav tau rau kev ua haujlwm ntawm cov khoom siv, kev cia siab ntawm kev siv cellulose ether yuav dav dua.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-06-2024