HydroxyPropyyl methylulose (HPMC) yog tus tseem ceeb ntxiv hauv looj cov xim pleev xim, ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm thiab cov xim zoo.
Taw qhia rau looj xim
Cov xim looj xim looj, tseem hu ua cov xim acrylic, yog cov xim xim zoo li cov dej xim dav siv hauv ob qho chaw nyob thiab cov ntawv thov kev lag luam. Nws muaj cov pigments, binders, cov kuab tshuaj, thiab ntau yam ntxiv. Cov xim tsev zoo yog qhov xav tau rau lawv qhov yooj yim ntawm kev siv, lub sijhawm kom qhuav nrawm, thiab theem qis ntawm cov txiv ntoo volatic (vocs), ua rau lawv ib puag ncig ib puag ncig.
Lub luag haujlwm ntawm HPMC hauv cov xim pleev xim
HPMC yog cov tsis-ionic cellulose ether tau los ntawm ntuj lub polymer cellulose. Nws yog dav siv nyob rau hauv looj cov xim pleev xim vim nws cov yeeb yaj kiab zoo tshaj plaws, cov peev xwm tuab, thiab dej kom muaj peev xwm khaws cia. Peb tshawb nrhiav li cas HPMC txhim kho cov kev ua tau zoo ntawm cov xim yas:
1. Rheology hloov kho:
HPMC ua raws li kev ntseeg rheology hauv latex xim tsim, tswj lub viscosity thiab ntws tus cwj pwm ntawm cov xim tha xim. Los kho cov rheology, HPMC ua kom cov kab txhuam kom zoo, tshuaj tsuag, thiab cov khoom siv cov khoom siv ntawm cov xim.
Qhov kev sib txuas ntawm HPMC pab tiv thaiv kom tiv thaiv sagging, dripping, thiab splattering thaum thov, ua rau hauv smoother thiab ntau yam ua tiav tiav.
2. Txhim kho dej ua ke:
HPMC muaj cov dej khov kho kom muaj zog, tso cai rau cov xim looj kua yas los tswj nws cov xwm txheej thiab ruaj khov nyob rau lub sijhawm.
Kev ua kom dej ua kom muaj zog kom ua kom muaj lub sijhawm qhib lub sijhawm, uas yog hais txog lub sijhawm thaum cov xim tsis tau ua haujlwm tom qab daim ntawv thov. Qhov no yog tau txais txiaj ntsig tshwj xeeb hauv huab cua noo lossis huab cua sov uas ziab sai tuaj yeem tshwm sim tuaj yeem tshwm sim tuaj yeem tshwm sim.
3. Txhim Kho Zaj Duab Xis Tsim:
HPMC AIDS hauv kev tsim ntawm ib zaj yeeb yaj kiab ruaj khov thiab uniform rau ntawm cov nto substrate. Nws txhim kho cov nplaum ntawm cov xim rau ntau qhov chaw, suav nrog cov tshuab ziab khaub ncaws, ntoo, hlau, thiab pob zeb.
Zaj duab xis-tsim cov khoom ntawm HPMC pab txhawb rau tag nrho cov kev ua kom muaj zog, txhuam tsis kam, thiab huab cua ntawm cov xim pleev xim rau cov xim zoo nkauj.
4. Cov nyhuv tawm tsam:
HPMC txo kev sib xyaw thaum cov xim pleev xim, ua kom huv si thiab ntau cov txheej txheem pleev xim ntxiv. Cov nyhuv tawm tsam no yog qhov tshwj xeeb tshaj yog thaum siv cov khoom siv tshuaj txau cov khoom siv hluav taws xob siab.
5. Kev Txiaj Ntsim Li:
HPMC stabilizes cov xim pleev xim rau cov xim looj xim los ntawm kev tiv thaiv xim balping kev teeb tsa, flocculation, thiab theem sib cais. Nws tswj hwm homogeneity ntawm cov xim, ua kom muaj xim xa tawm thiab kev ua tau zoo.
Txhim kho cov ruaj khov txuas ntxiv rau lub neej txee ntawm looj xim, txo cov khoom pov tseg thiab txhim kho cov khoom lag luam zoo.
6. VOC txo:
Los ntawm kev sib xyaw HPMC rau hauv cov xim looj xim looj, cov chaw tsim khoom tuaj yeem txo qis kev cia siab rau ntawm cov organic cov tebchaw (vocs) tsis muaj kev cuam tshuam. HPMC ua rau cov qauv tsim ntawm cov xim qis-voc lossis xoom-voc, lub rooj sib tham nruj ib puag ncig thiab cov neeg siv khoom nyiam.
7. Nrib thiab Crazing Kuj:
HPMC imparts yooj thiab elasticity rau cov xim qhuav zaj duab xis, txo txoj kev pheej hmoo ntawm kev tawg, crazing, thiab ua rau lub sij hawm flaking. Qhov no ua rau lub sijhawm ntev divility thiab aesthetic rov hais dua ntawm cov chaw pleev xim, tshwj xeeb yog cov chaw muaj tsheb loj lossis sab nrauv cov huab cua.
HPMC ua si lub luag haujlwm ntau multifaceted hauv kev txhim kho cov kev ua tau zoo ntawm cov xim looj xim looj. Los ntawm rheology thiab dej khaws cia rau zaj duab xis rau zaj duab xis thiab kev ruaj khov txhim kho, ruaj khov rau tag nrho cov xim zoo, ruaj khov, thiab cov khoom siv ntawm cov xim huv. Los ntawm kev siv tsheb ntawm HPMC, cov tuam txhab tsim khoom tuaj yeem tsim cov xim muaj zog uas ua tau raws li cov neeg siv khoom thaum ua raws li kev cai ib puag ncig.
Lub Sijhawm Post: Feb-18-2025