HPMC (Hydroxypropyl Methylcellulose) thickener additives ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev sib raug zoo ntawm cov xim. Qhov kev txhim kho no muaj ntau yam, tso siab rau cov khoom tshwj xeeb ntawm HPMC thiab nws cov kev sib cuam tshuam hauv cov xim pleev xim.
1. Kev Kho Mob Rheological:
HPMC ua raws li kev hloov kho rheology hauv cov xim pleev xim, cuam tshuam nws tus cwj pwm ntws thiab viscosity. Los ntawm kev kho cov viscosity, HPMC ua kom muaj kev tswj xyuas zoo dua ntawm daim ntawv thov xim thiab tiv thaiv sagging los yog poob. Daim ntawv thov kev tswj hwm no ua kom yooj yim txheej txheej tuab, ua kom pom kev sib raug zoo ntawm cov xim thiab cov substrate.
2. Txhim kho Cohesion:
Qhov sib ntxiv ntawm HPMC txhim kho kev sib koom ua ke ntawm cov xim pleev xim. HPMC molecules entangle nyob rau hauv cov xim matrix, tsim ib tug network qauv uas txhawb kev khi ntawm pigment hais thiab lwm yam khoom. Qhov kev sib koom ua ke zoo dua no txo qhov kev pheej hmoo ntawm kev tawg, flaking, lossis tev, yog li txhim kho lub sijhawm ntev ntawm cov xim.
3. Txhim kho dej tuav:
HPMC nthuav tawm cov khoom tuav dej zoo, uas yog qhov tseem ceeb thaum lub sij hawm ziab thiab kho cov theem ntawm daim ntawv thov xim. Los ntawm khaws cia cov dej noo nyob rau hauv cov xim pleev xim, HPMC ncua lub sij hawm kom qhuav, tso cai rau kev nkag tau zoo dua thiab adhesion rau substrate. Lub sijhawm ziab kom ntev ntev no ua kom muaj kev sib raug zoo ntawm cov xim thiab qhov chaw, txo qis qhov ua tsis tiav ntxov.
4. Substrate Wetting:
HPMC pab txhawb substrate wetting los ntawm kev txo qhov nro ntawm cov xim tsim. Cov cuab yeej no txhawb kev sib raug zoo ntawm cov xim thiab cov substrate, ua kom muaj kev sib raug zoo. Txhim khu kev ntub dej kuj tseem tiv thaiv kev tsim ntawm cov hnab tshos huab cua lossis cov voids, uas tuaj yeem cuam tshuam kev sib raug zoo ntawm kev sib raug zoo thiab ua rau kev ua tsis tiav ntawm lub sijhawm.
5. Stabilization ntawm Pigment Dispersion:
Hauv cov tshuaj pleev xim dej, HPMC stabilizes pigment dispersions los ntawm kev tiv thaiv particle nyob los yog agglomeration. Qhov kev sib txawv ntawm cov xim no thoob plaws hauv cov xim matrix ua kom cov xim zoo ib yam thiab txo qhov kev hloov pauv ntawm opacity thiab xim. Los ntawm kev tuav cov pigment stability, HPMC pab txhawb rau tag nrho cov aesthetic zoo ntawm cov xim thaum tib lub sij hawm txhim kho nws cov kev sib raug zoo zog.
6. Flexibility thiab Crack Resistance:
HPMC muab kev yooj yim rau cov xim zaj duab xis, tso cai rau nws kom haum rau substrate txav tsis muaj tawg lossis delamination. Qhov kev hloov pauv no tau txais txiaj ntsig tshwj xeeb hauv kev siv sab nrauv, qhov twg qhov kub thiab txias hloov pauv tuaj yeem ua rau muaj kev ntxhov siab ntawm cov xim pleev xim. Los ntawm kev txhim kho cov kab nrib pleb, HPMC prolongs lub neej ntawm cov xim txheej thiab tswj nws txoj kev ncaj ncees nyob rau lub sijhawm.
HPMC thickener additives ua lub luag haujlwm ntau yam hauv kev txhim kho cov xim sib txuas. Los ntawm kev hloov kho rheological, txhim kho kev sib koom ua ke, txhim kho cov dej tuav, substrate wetting, stabilization ntawm pigment dispersion, thiab ntxiv zog, HPMC pab txhawb rau tag nrho cov kev ua tau zoo thiab durability ntawm xim formulations. Los ntawm kev txhim kho kev sib raug zoo ntawm cov xim thiab cov substrate, HPMC pab ua kom muaj kev sib raug zoo, kev ua neej ntev, thiab kev zoo nkauj hauv ntau daim ntawv thov pleev xim.
Post lub sij hawm: May-08-2024