Hydroxyethyl Cellulose (HEC) yog ib hom dej-soluble polymer compound dav siv hauv cov xim latex. Nws tsis tsuas yog ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ua tau zoo, tab sis kuj tseem txhim kho cov ntawv thov kev paub thiab qhov zoo ntawm cov zaj duab xis zaum kawg.
Cov khoom ntawm Hydroxyethyl Cellulose
Hydroxyethyl cellulose yog ib qho nonionic cellulose ether tsim los ntawm ntuj cellulose los ntawm kev hloov kho etherification. Nws muaj zoo thickening, suspending, dispersing thiab emulsifying zog. Cov khoom no ua rau HEC tsim cov colloids ruaj khov nyob rau hauv cov tshuaj aqueous nrog viscosity siab thiab zoo rheological zog. Tsis tas li ntawd, HEC cov tshuaj aqueous muaj cov pob tshab zoo thiab muaj peev xwm khaws dej tau zoo. Cov yam ntxwv no ua rau nws siv dav hauv cov xim latex.
Lub luag haujlwm hauv cov xim latex
tuab
Raws li ib qho ntawm cov thickeners tseem ceeb ntawm cov xim latex, HEC lub luag haujlwm tseem ceeb tshaj plaws yog ua kom cov viscosity ntawm cov xim ua kua. Kev tsim nyog viscosity tuaj yeem tsis tsuas yog txhim kho kev ruaj ntseg ntawm cov xim latex, tab sis kuj tiv thaiv nag lossis daus thiab delamination. Tsis tas li ntawd, qhov tsim nyog viscosity pab tswj sagging thiab ua kom zoo leveling thiab kev pab them nqi thaum lub sij hawm thov, yog li tau txais ib tug uniform txheej zaj duab xis.
kev txhim kho kev ruaj ntseg
HEC tuaj yeem txhim kho qhov ruaj khov ntawm cov xim latex. Hauv kev tsim cov xim latex, HEC tuaj yeem tiv thaiv pigments thiab fillers los ntawm kev daws teeb meem, tso cai rau cov xim kom nyob twj ywm sib npaug thaum khaws thiab siv. Cov cuab yeej no tseem ceeb tshwj xeeb rau kev khaws cia ntev, pab kom ntev lub neej txee ntawm cov xim latex.
Kev tuav dej
Kev tsim kho ntawm cov xim latex feem ntau suav nrog kev siv dej ntau, thiab HEC cov dej tuav tau zoo ua kom cov txheej txheem dej sib npaug ntawm cov txheej txheem kom qhuav, tsis txhob muaj qhov tsis xws luag xws li tawg, hmoov av thiab lwm yam teeb meem tshwm sim los ntawm cov dej evaporation sai. . Qhov no tsis tsuas yog pab tsim cov zaj duab xis txheej, tab sis kuj txhim kho cov adhesion thiab durability ntawm txheej zaj duab xis.
Kev kho rheology
Raws li kev hloov kho rheology, HEC tuaj yeem kho tus cwj pwm shear thinning ntawm cov xim latex, uas yog, viscosity ntawm cov xim raug txo qis ntawm cov nqi siab (xws li txhuam, cov menyuam txheej, lossis tshuaj tsuag), ua kom yooj yim rau kev thov, thiab ntawm qis shear tus nqi. Viscosity rov qab ntawm tus nqi shear (piv txwv li thaum so) tiv thaiv sagging thiab ntws. Cov cuab yeej rheological no muaj kev cuam tshuam ncaj qha rau kev tsim kho thiab cov txheej txheem kawg ntawm cov xim latex.
Kev txhim kho kev tsim kho
Kev taw qhia ntawm HEC tuaj yeem txhim kho kev ua haujlwm ntawm cov xim latex, ua rau cov xim zoo dua thiab zoo ib yam thaum siv. Nws tuaj yeem txo cov txhuam hniav, muab cov smoothness zoo thiab gloss ntawm txheej zaj duab xis, thiab txhim kho cov neeg siv kev paub.
Xaiv thiab siv
Hauv kev tsim cov xim latex, kev xaiv thiab ntau npaum li cas ntawm HEC yuav tsum tau hloov kho raws li cov kev xav tau tshwj xeeb. HEC nrog cov viscosities sib txawv thiab qib kev hloov pauv yuav muaj qhov sib txawv ntawm kev ua haujlwm ntawm cov xim latex. Feem ntau hais lus, high-viscosity HEC yog qhov tsim nyog rau cov xim tuab-coated latex uas yuav tsum tau muaj viscosity siab dua, thaum tsis tshua muaj viscosity HEC yog tsim rau nyias-coated xim nrog fluidity zoo dua. Tsis tas li ntawd, tus nqi ntawm HEC ntxiv yuav tsum tau ua kom zoo raws li qhov xav tau tiag tiag. HEC ntau dhau yuav ua rau cov txheej txheej tuab heev, uas tsis tsim nyog rau kev tsim kho.
Raws li ib qho tseem ceeb ua hauj lwm additive, hydroxyethyl cellulose plays ntau lub luag hauj lwm nyob rau hauv latex xim: thickening, stabilizing, tuav dej thiab txhim kho kev ua hauj lwm. Tsim nyog siv HEC tuaj yeem tsis tsuas yog txhim kho kev ruaj khov thiab kev tsim kho ntawm cov xim latex, tab sis kuj tseem txhim kho qhov zoo thiab ua haujlwm ntawm cov zaj duab xis txheej. Nrog rau txoj kev loj hlob ntawm cov txheej txheem kev lag luam thiab kev ua haujlwm thev naus laus zis, daim ntawv thov kev cia siab ntawm HEC hauv cov xim latex yuav dav dua.
Post lub sij hawm: Aug-03-2024