Hydroxypropyl methylcellulose (HPMC) yog ib qho kev ua tau zoo tshaj plaws uas siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov gypsum-based plasters thiab gypsum khoom.
(1) Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog ib qho nonionic cellulose ether tau los ntawm cov tshuaj methylation thiab hydroxypropylation. Nws cov yam ntxwv tseem ceeb suav nrog cov dej solubility siab, cov khoom thickening zoo heev, cov khoom siv tshuaj lom neeg ruaj khov thiab cov khoom ua yeeb yaj kiab zoo. Cov khoom no ua rau HPMC dav siv hauv cov khoom siv hauv tsev.
(2) Kev siv HPMC hauv gypsum-based plaster
1. Thickening tus neeg ua haujlwm ua haujlwm
Nyob rau hauv gypsum-raws li plaster, HPMC feem ntau yog siv los ua ib tug thickening neeg sawv cev. Nws cov dej zoo solubility thiab thickening zog tuaj yeem txhim kho cov viscosity thiab stability ntawm stucco, tiv thaiv delamination thiab nag lossis daus, yog li txhim kho kev tsim kho thiab cov khoom tiav tiav.
2. Kev tuav dej
HPMC muaj kev tuav dej zoo heev thiab tuaj yeem txo cov dej sai sai. Nyob rau hauv gypsum-based plasters, cov cuab yeej no pab txhawb kev ua haujlwm thiab txhim kho kev tsim kho thaum tiv thaiv kev tawg thiab ua kom luv los ntawm cov dej evaporation sai.
3. Txhim kho adhesion
HPMC tuaj yeem txhim kho qhov adhesion ntawm plaster thiab substrate. Qhov no yog vim hais tias cov yeeb yaj kiab tsim los ntawm HPMC tom qab ziab kom qhuav muaj qee qhov yooj yim thiab adhesion, yog li txhim kho lub zog sib txuas ntawm plaster thiab phab ntsa lossis lwm cov substrates thiab tiv thaiv nws los ntawm kev poob.
(3) Kev siv HPMC hauv cov khoom siv gypsum
1. Txhim kho kev ua haujlwm
Hauv kev tsim cov khoom lag luam gypsum, HPMC tuaj yeem txhim kho qhov fluidity thiab uniformity ntawm slurry, txo qhov tsim ntawm npuas, thiab ua kom cov khoom denser thiab zoo ib yam. Nyob rau tib lub sijhawm, cov nyhuv thickening ntawm HPMC pab tsim cov txheej txheem du ntawm cov khoom thiab txhim kho cov tsos zoo ntawm cov khoom.
2. Txhim kho qhov tawg tsis kam
Cov dej tuav ntawm HPMC hauv cov khoom siv gypsum pab tswj qhov tso tawm ntawm cov dej thiab txo cov kev ntxhov siab sab hauv los ntawm cov dej tsis sib xws, yog li txhim kho qhov tawg tsis kam thiab tag nrho lub zog ntawm cov khoom. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig qhuav, cov dej tuav cov nyhuv ntawm HPMC yog qhov tseem ceeb dua thiab tuaj yeem tiv thaiv cov khoom tawg thaum ntxov.
3. Txhim kho cov khoom siv kho tshuab
Qhov sib npaug sib faib fiber ntau tsim los ntawm HPMC hauv cov khoom siv gypsum tuaj yeem txhim kho qhov toughness thiab cuam tshuam ntawm cov khoom. Cov yam ntxwv no ua rau cov khoom siv gypsum tsis tshua muaj kev puas tsuaj thaum lub sijhawm thauj mus los thiab kev teeb tsa, txuas ntxiv lawv lub neej kev pabcuam.
(4) Kev siv tau zoo ntawm HPMC
1. Txhim kho kev tsim kho kom zoo
Vim tias HPMC txhim kho kev ua haujlwm thiab kev tsim kho kev ua haujlwm ntawm gypsum-based plaster thiab gypsum cov khoom, cov txheej txheem kev tsim kho yog smoother thiab ntau npaum, txo tus naj npawb ntawm reworks thiab kho, yog li txhim kho tag nrho kev tsim kho efficiency.
2. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
Raws li cov khoom siv ntawm lub hauv paus chiv keeb, HPMC tsis tsim cov tshuaj phem thaum nws tsim thiab siv, thiab ua tau raws li kev tiv thaiv ib puag ncig thiab kev nyab xeeb. Tsis tas li ntawd, HPMC tsis tso cov pa phem thaum siv, ua kom muaj kev nyab xeeb rau cov neeg ua haujlwm tsim kho thiab cov neeg siv kawg.
3. Cov txiaj ntsig nyiaj txiag
Daim ntawv thov ntawm HPMC tuaj yeem txhim kho qhov ua tau zoo thiab zoo ntawm cov khoom siv gypsum, yog li txo cov khoom pov tseg thiab rov ua haujlwm dua thiab txhim kho cov txiaj ntsig kev lag luam. Nyob rau tib lub sijhawm, kev ua haujlwm siab ntawm HPMC ua rau muaj txiaj ntsig tseem ceeb kom ua tiav txawm tias muaj me me ntxiv, thiab muaj txiaj ntsig zoo.
Raws li cov khoom tseem ceeb hauv tsev ntxiv, HPMC muaj qhov zoo ntawm nws daim ntawv thov hauv gypsum-based plaster thiab gypsum khoom. Nws cov thickening zoo heev, dej tuav thiab sib txuas cov khoom tsis yog tsuas yog txhim kho kev tsim kho ntawm cov khoom siv thiab cov khoom tiav, tab sis kuj txhim kho cov txiaj ntsig kev lag luam thiab kev tiv thaiv ib puag ncig. Raws li kev tsim kho kev lag luam qhov kev thov rau kev ua haujlwm siab, cov ntaub ntawv zoo ib puag ncig nce, daim ntawv thov kev cia siab ntawm HPMC hauv cov ntaub ntawv gypsum yuav dhau los ua dav dua.
Post lub sij hawm: Lub Xya hli ntuj-25-2024