Kev siv Hydroxypropyl Methylcellulose hauv Gypsum

Hydroxypropyl Methylcellulose (HPMC)yog ib qho tshuaj ntxiv uas feem ntau siv hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv gypsum. HPMC muaj dej tuav zoo, thickening, lubrication thiab adhesion, ua rau nws yog ib qho tseem ceeb ntawm cov khoom gypsum.

1. Lub luag haujlwm ntawm HPMC hauv gypsum

Txhim kho kev tuav dej

HPMC muaj kev nqus dej zoo heev thiab khaws cov dej cia. Thaum siv cov khoom siv gypsum, ntxiv qhov tsim nyog ntawm HPMC tuaj yeem ncua qhov dej tsis zoo, txhim kho kev ua haujlwm ntawm gypsum slurry, ua kom nws ntub tau ntev thaum lub sijhawm tsim kho, thiab tsis txhob tawg los ntawm cov dej evaporation sai.

Txhim khu adhesion thiab anti-sagging zog

HPMC muab gypsum slurry zoo adhesion, tso cai rau nws ua kom ruaj khov rau phab ntsa lossis lwm yam substrates. Rau cov ntaub ntawv gypsum tsim rau ntawm qhov chaw ntsug, cov nyhuv thickening ntawm HPMC tuaj yeem txo sagging thiab xyuas kom cov uniformity thiab zoo huv si ntawm kev tsim kho.

Txhim kho kev tsim kho kev ua haujlwm

HPMC ua rau gypsum slurry yooj yim rau kev thov thiab sib kis, txhim kho kev tsim kho, thiab txo cov khoom pov tseg. Tsis tas li ntawd, nws tseem tuaj yeem txo qhov kev sib txhuam thaum lub sij hawm tsim kho, ua kom yooj yim thiab smoother rau cov neeg ua haujlwm tsim kho kom ua haujlwm.

Txhim kho kev tawg tsis kam

Thaum lub sij hawm coagulation txheej txheem ntawm gypsum khoom, uneven evaporation ntawm dej yuav ua rau nto tawg. HPMC ua rau gypsum hydration ntau yam los ntawm nws cov dej tuav tau zoo, yog li txo qhov tsim ntawm cov kab nrib pleb thiab txhim kho tag nrho cov khoom tiav.

Kev cuam tshuam ntawm lub sijhawm coagulation

HPMC tuaj yeem txuas ntxiv lub sijhawm ua haujlwm ntawm gypsum slurry, tso cai rau cov neeg ua haujlwm tsim kho kom muaj sijhawm txaus los kho thiab txiav, thiab zam kev tsim kho tsis ua haujlwm vim yog coagulation ntawm gypsum ceev heev.

2. Daim ntawv thov ntawm HPMC hauv cov khoom sib txawv gypsum

Gypsum plastering

Hauv cov ntaub ntawv gypsum plastering, lub luag haujlwm tseem ceeb ntawm HPMC yog txhawm rau txhim kho cov dej tuav thiab txhim kho kev tsim kho, kom gypsum tuaj yeem ua raws li phab ntsa zoo dua, txo qhov tawg, thiab txhim kho kev tsim kho kom zoo.

Gypsum hmoov

HPMC tuaj yeem txhim kho lubricity thiab smoothness ntawm putty, thaum txhim kho adhesion, ua kom nws zoo dua rau kev kho kom zoo nkauj.

Gypsum board

Hauv gypsum board ntau lawm, HPMC feem ntau yog siv los tswj cov hydration tus nqi, tiv thaiv lub rooj tsavxwm kom qhuav sai heev, txhim kho qhov zoo ntawm cov khoom tiav, thiab txhim kho nws cov kab nrib pleb.

Gypsum self-leveling

HPMC tuaj yeem ua lub luag haujlwm thickening hauv gypsum self-leveling cov ntaub ntawv, muab nws zoo dua fluidity thiab stability, tsis txhob sib cais thiab sedimentation, thiab txhim kho kev tsim kho efficiency.

3. Yuav siv HPMC li cas

Muaj ntau txoj hauv kev hauv qab no ntxiv HPMC rau gypsum khoom:
Kev sib xyaw qhuav ncaj qha: Sib tov HPMC ncaj qha nrog cov ntaub ntawv qhuav xws li gypsum hmoov, thiab ntxiv dej thiab do sib npaug thaum tsim kho. Txoj kev no yog tsim rau cov khoom ua ntej sib xyaw gypsum, xws li gypsum putty thiab plastering cov ntaub ntawv.

Ntxiv tom qab kev sib tov ua ntej: Dissolve HPMC hauv dej rau hauv cov tshuaj colloidal ua ntej, thiab tom qab ntawd ntxiv rau gypsum slurry kom zoo dua dispersion thiab dissolution. Nws yog qhov tsim nyog rau cov khoom lag luam nrog qee cov txheej txheem tshwj xeeb.

4. Kev xaiv thiab kev tswj hwm ntau npaum li cas ntawm HPMC

Xaiv qhov tsim nyog viscosity

HPMC muaj cov qauv viscosity sib txawv, thiab qhov tsim nyog viscosity tuaj yeem xaiv raws li qhov xav tau tshwj xeeb ntawm cov khoom siv gypsum. Piv txwv li, high-viscosity HPMC yog qhov tsim nyog rau kev ua kom adhesion thiab anti-sagging, thaum tsawg-viscosity HPMC yog qhov tsim nyog rau cov ntaub ntawv gypsum nrog ntau dua fluidity.

Tsim nyog tswj tus nqi ntxiv

Tus nqi ntawm HPMC ntxiv yog feem ntau qis, feem ntau ntawm 0.1%-0.5%. Kev sib ntxiv ntau dhau tuaj yeem cuam tshuam rau lub sijhawm teeb tsa thiab lub zog kawg ntawm gypsum, yog li nws yuav tsum tau kho kom haum raws li cov khoom lag luam thiab kev tsim kho.

Hydroxypropyl methylcellulose yog sivplays lub luag haujlwm tseem ceeb hauv cov khoom siv gypsum. Nws tsis tsuas yog txhim kho cov dej tuav thiab kev tsim kho kev ua haujlwm, tab sis kuj txhim kho adhesion thiab tawg tsis kam, ua cov khoom gypsum ruaj khov thiab ruaj khov. Tsim nyog xaiv thiab siv HPMC tuaj yeem txhim kho qhov zoo ntawm cov khoom gypsum thiab ua tau raws li ntau yam kev xav tau ntawm kev tsim kho.