HPMC (hydroxypropyl methylcellulose) muaj ntau yam kev siv hauv kev lag luam txheej thiab xim. Raws li cov khoom siv polymer, nws tuaj yeem txhim kho lub cev zoo thiab siv cov teebmeem ntawm cov txheej thiab xim.
1. Thickeners thiab rheology tswj cov neeg ua haujlwm
HPMC muaj cov nyhuv thickening zoo. Hauv kev lag luam txheej thiab cov xim, HPMC tuaj yeem ua kom cov viscosity thiab txhim khu cov rheology ntawm txheej. Qhov thickening no pab tswj qhov ntws thiab ruaj khov ntawm cov xim thaum lub sij hawm thov, ua kom yooj yim rau kev thov thiab faib tusyees. Tshwj xeeb tshaj yog thaum pleev xim facades, HPMC tuaj yeem tiv thaiv cov xim los ntawm sagging, txhim kho kev ua haujlwm, thiab xyuas kom meej qhov flatness thiab uniformity ntawm txheej.
HPMC muaj lub peev xwm tshwj xeeb los kho cov rheology ntawm cov txheej txheem, tso cai rau lawv nthuav tawm cov yam ntxwv ntawm pseudoplastic ntws. Qhov no txhais tau hais tias nyob rau hauv shear (xws li thaum pleev xim los yog txau), viscosity ntawm cov xim yuav txo qis, ua kom yooj yim rau kev thov, thiab thaum so, lub viscosity yuav rov qab los tiv thaiv dripping los yog sagging.
2. Film-forming additives
HPMC muaj cov cuab yeej ua yeeb yaj kiab zoo, uas ua rau nws muaj txiaj ntsig zoo li cov yeeb yaj kiab tsim cov khoom ntxiv hauv cov txheej txheem thiab cov xim. HPMC tuaj yeem ua haujlwm sib koom ua ke nrog lwm cov yeeb yaj kiab tsim cov yeeb yaj kiab los tsim cov yeeb yaj kiab tsis sib xws thiab ntom ntom. Cov txheej no tuaj yeem txhim kho cov txheej txheej adhesion thiab tiv thaiv kev tawg thiab tev, yog li txhim kho cov kav ntev thiab cuam tshuam ntawm cov txheej. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho cov dej tsis kam ntawm cov txheej txheem, txo qhov cuam tshuam ntawm cov dej noo ntawm cov yeeb yaj kiab txheej, thiab txuas ntxiv lub neej kev pab cuam ntawm txheej.
3. Moisturizer thiab tiv thaiv daim tawv nqaij
HPMC muaj cov khoom zoo moisturizing, uas ua lub luag haujlwm tseem ceeb hauv cov txheej txheem ziab ntawm cov txheej txheem. Thaum siv cov xim, tswj cov av kom zoo thiab ncua sij hawm kom qhuav tuaj yeem pab ua kom daim ntawv thov du thiab txawm tias ziab ntawm cov xim, txo qhov muaj peev xwm ntawm cov kab nrib pleb lossis npuas. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig kub lossis qhuav, HPMC tuaj yeem tiv thaiv cov xim pleev xim kom qhuav sai sai thiab tsis txhob tawv nqaij, yog li txhim kho cov xim zoo nkauj.
4. Suspending agents thiab stabilizers
Hauv cov txheej txheem kev lag luam thiab cov xim pleev xim, HPMC ua raws li tus neeg sawv cev ncua kev ua haujlwm zoo, tiv thaiv pigments thiab fillers los ntawm kev daws teeb meem. Vim lub thickening thiab rheological hloov los ntawm HPMC, nws muaj peev xwm ua rau lub ncua kev kawm ntawv system ruaj khov, xyuas kom meej tias pigments thiab fillers yog sib npaug zos faib nyob rau hauv lub txheej, thiab txo delamination. Qhov no tso cai rau cov xim kom muaj kev sib xws thaum khaws cia thiab siv, zam cov xim tsis sib xws lossis kev hloov pauv ua haujlwm los ntawm cov xim xim.
5. Txhim kho kev tsim kho kev ua haujlwm
Lub thickening, moisturizing, film-forming thiab lwm yam khoom ntawm HPMC tuaj yeem txhim kho kev tsim kho ntawm cov txheej txheem rau qee yam. Piv txwv li, lubricity ntawm HPMC tuaj yeem txhim kho qhov kev xav thaum txhuam thiab dov, ua rau cov xim yooj yim dua. Tsis tas li ntawd, HPMC tuaj yeem tswj xyuas kom qhuav ceev ntawm cov xim, uas tuaj yeem tsis tsuas yog txo cov xim pleev xim tab sis kuj zam kev tsim teeb meem los ntawm kev ziab sai heev.
Rau cov txheej txheem tshuaj tsuag txheej, HPMC tuaj yeem txo qhov tawg thiab txhim kho txheej txheej los ntawm kev kho cov viscosity thiab fluidity ntawm txheej. Rau cov menyuam txheej thiab txhuam txheej, HPMC tuaj yeem ua kom cov nplaum nplaum ntawm cov txheej txheem, tiv thaiv cov txheej txheem los ntawm dripping thiab sagging, thiab txhim kho qhov smoothness ntawm txheej.
6. Daim ntawv thov nyob rau hauv ib puag ncig tus phooj ywg txheej
Nrog kev txhim kho txuas ntxiv ntawm kev tiv thaiv ib puag ncig, cov txheej txheem dej raws li tau siv ntau dua hauv kev lag luam. HPMC yog cov dej-soluble polymer, tshwj xeeb tshaj yog tsim rau cov dej-raws li txheej thiab cov xim zoo nkauj. Hauv cov txheej txheem dej, HPMC tuaj yeem tsis tsuas yog txhim kho cov nyhuv thickening ntawm txheej, tab sis kuj ruaj khov disperse ntau yam pigments thiab additives hauv dej, txo cov emission ntawm volatile organic compounds (VOC), thiab ua raws li cov kev cai ntawm ib puag ncig cov cai.
7. Anti-sag thiab leveling zog
Thaum lub sij hawm cov txheej txheem painting tiag, cov xim tsis kam mus rau sag yog qhov tseem ceeb, tshwj xeeb tshaj yog thaum pleev xim rau saum npoo. Los ntawm kev kho cov viscosity ntawm cov xim, HPMC tuaj yeem txhim kho nws cov kev ua haujlwm tiv thaiv sag thiab txo cov ntshav los ntawm cov xim ntawm lub façade. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho cov qib theem ntawm cov xim, ua rau cov xim ntawm cov yeeb yaj kiab smoother thiab tsis muaj cov cim txhuam, ua kom zoo nkauj ntawm cov txheej.
8. Txhim kho huab cua tsis kam
Kev siv HPMC hauv cov txheej txheem kuj tuaj yeem txhim kho huab cua tsis kam ntawm txheej. Hauv kev pleev xim rau sab nraum zoov, xim feem ntau cuam tshuam los ntawm ib puag ncig xws li cua, hnub, nag, thiab lwm yam. HPMC tuaj yeem txhim kho UV tiv thaiv thiab tiv thaiv kev laus ntawm cov yeeb yaj kiab txheej, ncua sijhawm fading, hmoov thiab tawg ntawm txheej zaj duab xis, thiab xyuas kom meej. tias cov txheej txheem tswj nws txoj kev zoo nkauj thiab kev ua haujlwm ntev.
9. Kho kom qhuav ceev
Raws li kev tsim kho sib txawv, qhov ziab nrawm ntawm cov txheej thiab cov xim yuav tsum tau tswj kom tsim nyog. HPMC tuaj yeem hloov lub sijhawm ziab ntawm txheej kom hloov mus rau qhov sib txawv ntawm kev tsim kho los ntawm kev kho nws qhov ntau npaum thiab cov qauv. Kev ziab kom qeeb qeeb yuav pab txhim kho lub sijhawm hloov pauv thaum lub sijhawm thov, thaum ziab kom qhuav yog tsim nyog rau kev xav tau ntau dua kev lag luam tha xim ib puag ncig.
10. Nqi-zoo thiab yooj yim ntawm kev siv
Raws li cov khoom siv ntxiv uas muaj txiaj ntsig zoo, HPMC daim ntawv thov hauv cov txheej txheem thiab cov xim tsis tuaj yeem txhim kho cov txheej txheem ua tau zoo, tab sis kuj muaj txiaj ntsig zoo. HPMC tuaj yeem ua tiav qhov zoo tshaj plaws thickening thiab rheology hloov cov teebmeem nrog cov tshuaj tsawg, txo kev siv lwm yam khoom kim heev. Tsis tas li ntawd, HPMC muaj kev sib raug zoo, yooj yim ntxiv thiab sib xyaw ua ke hauv cov qauv sib txawv, yooj yim rau kev khiav lag luam, thiab tsim nyog rau kev lag luam loj.
HPMC yog siv dav thiab siv tau zoo hauv kev lag luam txheej thiab xim. Los ntawm nws qhov tshwj xeeb thickening, film-forming, moisturizing, ncua kev kawm ntawv, rheology tswj thiab lwm yam khoom, nws ho txhim khu kev tsim kho, leveling, huab cua tsis kam thiab ib puag ncig tiv thaiv ntawm txheej. Nrog rau qhov nce ntawm cov dej-raws li ib puag ncig tus phooj ywg txheej txheej, HPMC yuav ua lub luag haujlwm tseem ceeb hauv kev lag luam txheej txheej yav tom ntej kom tau raws li qhov xav tau ntawm kev lag luam thiab kev tiv thaiv ib puag ncig.
Post lub sij hawm: Sep-09-2024