Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom siv dav siv hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv plaster series. Nws cov qauv tshuaj muab nws cov dej solubility zoo heev, kev hloov kho viscosity thiab kev ua haujlwm saum npoo, yog li ua si ntau lub luag haujlwm tseem ceeb hauv stucco plaster.
1. Thickening thiab bonding zog
Raws li cov thickener, HPMC tuaj yeem ua kom muaj qhov sib xws thiab viscosity ntawm plaster. Qhov no tso cai rau cov gypsum slurry kom sib npaug ntawm lub substrate nto thaum lub sij hawm tsim kho thiab tiv thaiv sagging zoo. Tsis tas li ntawd, cov khoom sib txuas ntawm HPMC pab txhim kho kev sib koom ua ke ntawm cov gypsum thiab cov khoom siv hauv qab, ua kom muaj kev ruaj ntseg thiab ruaj khov ntawm txheej txheej tom qab kev tsim kho. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov ntawv thov ntawm cov kab ntsug thiab qhov siab xws li phab ntsa thiab qab nthab.
2. Kev tuav dej
Kev tuav dej yog lwm txoj haujlwm tseem ceeb ntawm HPMC hauv stucco plaster. Txij li cov ntaub ntawv gypsum xav tau cov tshuaj tiv thaiv dej thaum lub sijhawm tsim kho, kev poob dej sai yuav ua rau cov khoom tsis txaus, yog li cuam tshuam rau nws lub zog thiab kav ntev. HPMC tuaj yeem khaws cov dej noo zoo thiab ncua sijhawm ntawm cov dej evaporation, kom cov gypsum tuaj yeem tau txais cov dej noo txaus thaum lub sij hawm tsim kho thiab pib hardening theem. Qhov no tsis tsuas yog pab txhim kho kev ua haujlwm ntawm kev tsim kho, tab sis kuj txhim kho qhov zoo ntawm cov khoom tiav thiab txo qhov tshwm sim ntawm cov kab nrib pleb.
3. Txhim kho kev tsim kho kev ua haujlwm
Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho kev tsim kho ntawm stucco gypsum. Ua ntej tshaj plaws, nws tuaj yeem txhim kho lubricity ntawm slurry, ua rau cov gypsum swb zoo dua ntawm cov cuab yeej siv thiab txhim kho kev tsim kho. Qhov thib ob, HPMC tuaj yeem kho qhov rheology ntawm slurry, ua kom yooj yim rau kev sib kis thiab theem, yog li txo cov sij hawm tsim kho thiab cov tswv yim ua haujlwm. Tsis tas li ntawd, vim tias HPMC txhim kho qhov adhesion ntawm gypsum slurry, cov khoom pov tseg raug txo thaum lub sij hawm tsim kho, uas yog qhov tseem ceeb heev rau kev txuag nqi.
4. Txhim khu kev tiv thaiv tawg
Hauv kev tsim kho lub tsev, cov kab nrib pleb yog ib qho teeb meem tseem ceeb uas cuam tshuam rau qhov pom thiab kev ncaj ncees ntawm lub tsev. Cov dej tuav thiab thickening zog ntawm HPMC tuaj yeem txo qhov tshwm sim ntawm cov kab nrib pleb. Los ntawm kev ua kom cov viscosity thiab toughness ntawm gypsum, HPMC tuaj yeem ua kom qis qis ntawm cov slurry thiab txo qis kev ntxhov siab, yog li txo qhov tsim ntawm cov kab nrib pleb. Tsis tas li ntawd, HPMC tuaj yeem txhim kho qhov elasticity ntawm gypsum kom nws tuaj yeem teb tau zoo dua rau cov kev hloov pauv hauv ib puag ncig sab nraud, xws li kev hloov pauv hauv qhov kub thiab txias, yog li txhim kho qhov ntev ntawm lub tsev.
5. Hnav tsis kam thiab nto smoothness
Kev siv HPMC kuj tuaj yeem txhim kho qhov hnav tsis kam thiab nto smoothness ntawm stucco gypsum. Cov qauv zaj duab xis tsim los ntawm HPMC hauv slurry tuaj yeem ua rau cov tawv tawv thiab hnav tsis kam ntawm gypsum, ua rau nws qhov chaw muaj zog. Nyob rau tib lub sijhawm, vim nws cov dej tuav tau zoo thiab cov nyhuv thickening, gypsum nto yuav smoother thiab flatter tom qab hardening, uas yog tshwj xeeb tshaj yog ib qho tseem ceeb rau lub tsev qhov chaw uas yuav tsum tau muaj kev zoo nkauj zoo nkauj.
Daim ntawv thov ntawm hydroxypropyl methylcellulose (HPMC) nyob rau hauv stucco gypsum series khoom muaj qhov zoo tseem ceeb. Nws tsis tsuas yog txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm kev tsim kho, tab sis kuj tseem txhim kho lub cev thiab kev zoo nkauj ntawm cov khoom tiav. HPMC muab kev xaiv zoo thiab txhim khu kev qha rau cov khoom siv hauv tsev los ntawm nws cov thickening zoo heev, dej tuav, kev sib txuas, kev sib tsoo thiab lwm yam khoom. Nrog rau txoj kev loj hlob ntawm kev tsim kho kev lag luam thiab kev nce qib thev naus laus zis, daim ntawv thov kev cia siab ntawm HPMC hauv plaster thiab lwm yam khoom siv hauv tsev yuav dav dua.
Post lub sij hawm: Aug-12-2024