qhia:
Gypsum-raws li cov ntaub ntawv yog dav siv nyob rau hauv kev tsim kho tej yaam num rau lawv lub zog, durability thiab hluav taws kub.Cov ntaub ntawv no yog ua los ntawm gypsum, ib qho ntxhia sib xyaw uas feem ntau pom hauv cov pob zeb sedimentary, thiab dej.Gypsum-raws li cov ntaub ntawv feem ntau yog siv rau cov phab ntsa, qab nthab thiab cov plag tsev hauv cov tsev nyob, kev lag luam thiab kev lag luam.
Hydroxypropyl methylcellulose (HPMC) thiab hydroxyethyl methylcellulose (HEMC) yog nonionic cellulose ethers feem ntau siv hauv kev tsim kho.Lawv tau muab los ntawm ntuj polymers thiab yog dej soluble polymers.Lawv muaj ntau yam khoom uas ua rau lawv zoo tagnrho rau cov ntaub ntawv gypsum.
Kab lus no yuav tshawb txog ntau yam txiaj ntsig ntawm kev siv HPMC thiab HEMC hauv cov ntaub ntawv gypsum.
1. Txhim kho kev ua haujlwm
Ib qho txiaj ntsig tseem ceeb ntawm kev siv HPMC thiab HEMC hauv cov ntaub ntawv gypsum yog lawv lub peev xwm los txhim kho kev ua haujlwm.Thaum cov cellulose ethers ntxiv rau qhov sib tov, lawv ua kom cov dej tuav lub peev xwm ntawm cov cement thiab txhim kho kev sib xyaw, sib kis thiab troweling.
Yog li ntawd, gypsum-raws li cov ntaub ntawv tau dhau los ua haujlwm yooj yim nrog thiab cov neeg tsim khoom tuaj yeem sib xyaw ua ke, siv thiab ua kom lawv ua raws li qhov xav tau tshwj xeeb.Cov cuab yeej no tseem ceeb tshwj xeeb tshaj yog rau cov haujlwm uas xav tau cov qauv tsim tshwj xeeb lossis cov qauv sib txawv.
Tsis tas li ntawd, txhim kho kev tsim kho kom yooj yim rau kev tsim kho sai, txuag cov neeg cog lus thiab cov neeg siv sijhawm thiab nyiaj txiag.
2. Txhim kho adhesion thiab adhesion
Lwm qhov txiaj ntsig tseem ceeb ntawm kev siv HPMC thiab HEMC hauv cov ntaub ntawv gypsum yog lawv lub peev xwm los txhim kho kev sib raug zoo thiab adhesion.Cov cellulose ethers no txhim kho kev sib cuag ntawm cov khoom sib xyaw thiab cov substrate, uas ua rau muaj kev sib raug zoo, ntev ntev.
Cov cuab yeej no muaj txiaj ntsig tshwj xeeb rau cov haujlwm uas muaj cov av noo ib puag ncig, xws li chav dej, chav ua noj lossis pas dej da dej.Txhim khu kev sib txuas thiab adhesion tiv thaiv cov khoom los ntawm kev tawg, tev lossis delaminating, txawm tias nyob rau hauv cov xwm txheej nyuaj.
3. Ua kom dej tsis kam
HPMC thiab HEMC kuj paub txog lawv lub peev xwm los txhim kho dej tsis kam.Thaum ntxiv rau gypsum-raws li cov ntaub ntawv, cov cellulose ethers tsim ib txheej tiv thaiv ib ncig ntawm cov khoom, tiv thaiv dej los ntawm nkag mus rau saum npoo.
Qhov no feature yog tshwj xeeb tshaj yog ib qho tseem ceeb rau tej yaam num uas yuav tsum tau muaj dej tsis kam, xws li hauv qab daus, foundations los yog facades.Txhim khu kev tiv thaiv dej txo qis qhov kev pheej hmoo ntawm kev puas tsuaj los ntawm ya raws, pwm lossis mildew, ncua lub neej ntawm cov qauv.
4. Zoo heev rheology
Rheology yog kev tshawb fawb uas kawm txog qhov deformation thiab ntws ntawm cov ntaub ntawv hauv kev ntxhov siab.HPMC thiab HEMC paub txog lawv cov rheology zoo heev, uas txhais tau hais tias lawv tuaj yeem hloov cov viscosity, elasticity thiab plasticity ntawm cov ntaub ntawv gypsum.
Qhov no feature tshwj xeeb tshaj yog pab tau rau tej yaam num uas yuav tsum tau sib txawv theem ntawm sib xws, xws li tus kheej-leveling pem teb, hniav xim los yog moldings.Zoo heev rheology tso cai rau cov khoom hloov mus rau ntau yam duab, qhov ntau thiab tsawg thiab textures, uas ua rau ib tug du, uniform nto.
5. Txhim kho huab cua nkag
Aeration yog txheej txheem ntawm kev qhia me me npuas npuas rau hauv qhov sib tov los txhim kho cov khoom khov-thaw tsis kam, kev ua haujlwm thiab ua haujlwm ntev.HPMC thiab HEMC yog cov neeg ua haujlwm zoo tshaj plaws hauv huab cua, txhais tau tias lawv nce tus naj npawb thiab qhov loj ntawm cov pa npuas hauv cov ntaub ntawv gypsum.
Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau cov haujlwm uas yuav tsum muaj kev tiv thaiv siab khov-thaw, xws li sab nraum zoov pavements, txuas hniav lossis qhov.Kev txhim kho huab cua nkag mus tiv thaiv cov ntaub ntawv los ntawm kev tawg, tev lossis deteriorating vim qhov kub thiab txias, txo cov nqi tu thiab txhim kho kev ruaj ntseg hauv tsev.
nyob rau hauv xaus:
Kev siv HPMC thiab HEMC hauv cov khoom siv gypsum muaj ntau yam txiaj ntsig rau kev tsim kho kev lag luam.Cov nonionic cellulose ethers txhim kho processability, txhim khu adhesion thiab adhesion, nce dej tsis kam, muab rheology zoo heev thiab txhim kho huab cua entrapment.
Cov yam ntxwv no tsis tsuas yog txhim kho qhov zoo ntawm kev tsim kho, tab sis kuj txo cov nqi, nce kev tsim khoom, thiab txhim kho kev nyab xeeb ntawm kev tsim kho cov neeg ua haujlwm thiab cov neeg siv khoom.Yog li ntawd, kev siv HPMC thiab HEMC hauv cov ntaub ntawv gypsum tuaj yeem yog qhov kev xaiv zoo thiab tsim nyog rau txhua qhov kev tsim kho.
Post lub sij hawm: Aug-11-2023