Phab ntsa putty yog dab tsi?

Phab ntsa putty yog ib hom khoom siv los ua kom du nto ntawm phab ntsa los ntawm kev txhaws qhov khoob thiab ua kom nws tawm.Nws yog cov cement-based hmoov uas tov nrog dej los ua ib qho kev sib xyaw ua ke uas tuaj yeem siv rau ntawm phab ntsa.Ib qho tseem ceeb ntawm cov phab ntsa putty yog cellulose ether.

Cellulose ether yog dej-soluble polymer muab los ntawm ntuj cellulose.Nws yog tsim los ntawm chemically modifying cellulose, uas yog ib txwm tshwm sim polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa.Cellulose ether yog dav siv nyob rau hauv kev tsim kho kev lag luam raws li ib tug thickener, stabilizer, binder, thiab dej retention agent.Nws kuj yog siv los tsim ntau yam khoom siv, xws li khoom noj, tshuaj pleev ib ce, thiab tshuaj.

Nyob rau hauv cov ntaub ntawv ntawm phab ntsa putty, cellulose ether ua raws li ib tug thickener thiab binder.Thaum cellulose ether ntxiv rau cov phab ntsa putty sib tov, nws txhim kho nws txoj haujlwm ua haujlwm los ntawm kev muab kev sib luag.Qhov no ua rau nws yooj yim dua rau siv cov putty rau phab ntsa thiab xyuas kom meej tias nws adheres zoo rau saum npoo.Cellulose ether kuj tseem pab tiv thaiv kom tsis txhob shrinkage thiab tawg ntawm phab ntsa putty tom qab nws qhuav.

Lwm lub luag haujlwm tseem ceeb ntawm cellulose ether hauv phab ntsa putty yog nws lub peev xwm khaws dej.Phab ntsa putty yuav tsum nyob twj ywm rau qee lub sijhawm tom qab thov kom ntseeg tau tias nws qhuav kom zoo thiab ua kom muaj kev sib raug zoo nrog cov phab ntsa.Cellulose ether pab khaws cov dej hauv cov khoom sib xyaw ua ke, uas ua rau cov txheej txheem ziab thiab ua kom cov putty teeb kom zoo.

Qhov zoo thiab kev ua tau zoo ntawm phab ntsa putty yog cuam tshuam los ntawm hom thiab cov nqi ntawm cellulose ether siv.Muaj ntau hom cellulose ether muaj nyob hauv khw, xws li hydroxyethyl cellulose (HEC), methyl cellulose (MC), thiab carboxymethyl cellulose (CMC).Txhua hom muaj cov khoom sib txawv thiab cov yam ntxwv, thiab xaiv hom thiab tus nqi yog qhov tseem ceeb hauv kev txiav txim siab qhov zoo ntawm phab ntsa putty.

Hauv cov ntsiab lus, cellulose ether plays lub luag haujlwm tseem ceeb hauv kev tsim cov phab ntsa putty.Nws muab qhov tsim nyog thickening, khi, thiab dej tuav cov khoom rau cov khoom sib xyaw ua ke, uas ua kom nws ua haujlwm tau zoo, tiv thaiv shrinkage thiab tawg, thiab xyuas kom zoo kom qhuav thiab sib txuas rau phab ntsa.Xaiv hom thiab tus nqi ntawm cellulose ether yog qhov tseem ceeb hauv kev tsim cov phab ntsa zoo nkauj uas ua tau raws li cov qauv xav tau ntawm kev tsim kho kev lag luam.