HydroxyPropyyl methylcellose (HPMC) yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, siv tshuaj, cov tshuaj thiab cov khoom siv txhua hnub. Tshwj xeeb tshaj yog nyob rau hauv cov nplaum muaj cov nplaum, qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov nplaum.
1. Viscosity Kev Hloov Kho thiab Ruaj Khwv
HPMC muaj cov dej ua kom zoo thiab tshuaj lom neeg ruaj khov, thiab tuaj yeem tswj tau nws qhov ruaj khov nyob rau hauv qhov kub thiab txias thiab Ph. Qhov no yog qhov tseem ceeb rau kev tsim qauv ntawm cov nplaum muaj. Viscosity yog ib qho kev sib tw tseem ceeb uas cuam tshuam rau txheej txheej, ua haujlwm thiab lub zog ua kom muaj zog ntawm cov nplaum. Los ntawm kev ntxiv hpmc, lub viscosity ntawm cov nplaum muaj peev xwm tuaj yeem hloov kho ntau qhov ntau, yog li ntawd nws tuaj yeem qhia cov kev ua haujlwm zoo thiab lub ntsej muag zoo nyob hauv ib puag ncig sib txawv. Lub viscosity tswj kev ua haujlwm ntawm HPMC ua rau nws nyuaj rau cov nplaum kom stratify thaum lub sij hawm cia, uas txhim kho nws cov kev ruaj khov thiab kev pabcuam lub neej.
2. Dej khaws cia thiab ncua sijhawm qhib
HPMC muaj lub peev xwm ua kom muaj zog tseem ceeb, uas tuaj yeem khaws cov dej noo thaum lub tsev ua kua nplaum thiab tiv thaiv kom tsis txhob muaj zog sai. Qhov no yog qhov tshwj xeeb tshaj yog rau cov nplaum nrog dej raws li cov kuab tshuaj. Lub sij hawm zoo khaws cia yuav txuas ntxiv lub sijhawm qhib ntawm cov nplaum, tso cai rau kom muaj cov nplaum ua kom ntev dua thaum ntawv thov, yog li kev txhim kho kev tsim kho kev tsim kho. Kev siv HPMC hauv cov nplaum-raws cov nplaum kuj tseem tuaj yeem txo cov dej ntws ntau dhau ntawm cov nplaum, kom meej meej tias cov nplaum tsis ua ntej lub sijhawm kho tus txheej txheem.
3. Thickening thiab rawv rawv cov kev cai
HPMC yog cov tuab tuab heev uas tuaj yeem txhim kho kev tsim kho kev tsim kho ntawm cov nplaum los ntawm kev kho nws cov khoom siv hluav taws xob. Hauv kev tsim kho lossis kev lag luam, lub zog rheological ntawm cov nplaum ntawm cov nplaum cuam tshuam rau kev yooj yim ntawm nws daim ntawv thov, extrusion thiab kis mus. Los ntawm kev ntxiv HPMC, cov nplaum muaj txiaj ntsig tau kom haum thiab muaj kev sib txuam, tsis txhob muaj teeb meem xws li sagging thiab txaws. Nyob rau tib lub sijhawm, cov nyhuv tuab ntawm HPMC ua rau cov nplaum HPMC ua rau muaj cov nplaum thiab yooj yim siv rau cov txheej txheem kev tsim kho.
4. Tiv thaiv cov teeb meem tawg thiab shrinkage
Kev muaj cov nplaum muaj kev sib tsoo lossis cov teeb meem shrinkage thaum ziab lossis kho kom zoo, tshwj xeeb tshaj yog thaum thov dua thaj chaw loj. Qhov kev sib ntxiv ntawm HPMC tuaj yeem daws qhov teeb meem no rau ib qho loj. Vim nws cov dej zoo heev thiab yoog raws, HPMC tuaj yeem tiv thaiv shrinkage thiab nras teeb meem tshwm sim los ntawm kev poob ntau dhau thaum lub sijhawm ua kom qhuav. Nyob rau tib lub sijhawm, HPMC tuaj yeem tsim cov qauv kev faib tawm ntawm cov txheej txheem ntawm cov nplaum, tsis txhob kho qhov tsis xws luag, yog li kev txhim kho qhov zoo thiab kev ntseeg tau ntawm cov nplaum.
5. Viscosity dua thiab daim ntawv cog lus lub zog ua tiav
HPMC tsis yog tsuas yog lub thickener, tab sis kuj tseem muaj qee yam viscosity ua nyhuv. Hauv qee cov ntawv thov tshwj xeeb, xws li kev sib khi ntawm Veneer cov ntaub ntawv thiab cov khoom siv sib xyaw, thawj lub ntsiab lus viscosity thiab bondnative lub zog ntawm cov nplaum yog qhov tseem ceeb. HPMC tuaj yeem txhim kho txoj kev sib txuas lus ntawm cov nplaum, thiab txuas ntxiv txhim kho nws txoj hlua khi ntawm nws cov qauv molecular nrog cov nplaum ua kom zoo nkauj. Tsis tas li ntawd, HPMC tuaj yeem tsim zaj duab xis qub thaum lub sijhawm kho cov txheej txheem, nce thaj chaw ua kom zoo dua qub, thiab txuas ntxiv txhim kho cov nplaum ntawm cov nplaum.
6. Los tawm tsam sagging thiab kev tsim kho-phooj ywg
Hauv kev tsim kho tiag tiag, cov adhesives yog nquag mus rau sagging lossis zawv zawg thaum thov ntawm cov chaw ntsug lossis inclined. Raws li kev tswj hwm RHE muaj txiaj ntsig, HPMC tuaj yeem tiv thaiv sagging los ntawm nce cov txiaj ntsig kev ntxhov siab ntawm cov nplaum. Nws cov kev ua tuab zoo heev tuaj yeem ua kom paub meej tias cov qauv nplaum kom sai sai tom qab txheej, yog li ua cov nplaum zoo nkauj rau saum npoo thiab tsis txhob sagging. Cov yam ntxwv no tshwj xeeb yog qhov tshwj xeeb tshaj yog nyob rau hauv kev siv ntsug lossis sab saum toj saum npoo av, uas tuaj yeem txhim kho qhov yooj yim thiab kev tsim kho zoo thiab zoo ntawm kev tsim kho.
7. Kev txhim kho huab cua tsis kam thiab kav ntev
Cov lus qhia ntawm HPMC tseem tuaj yeem txhim kho huab cua tsis kam thiab ua kom muaj cov nplaum. HPMC muaj cov tshuaj ruaj khov zoo thiab UV kuj, thiab tuaj yeem tiv thaiv tus cawv ntawm cov khoom siv sab nraud ntawm kev ua haujlwm ntawm cov nplaum. Tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov sab nraum zoov, cov ntawv nplaum tau yooj yim cuam tshuam los ntawm cov lus xws li kub, av noo, uas muaj teeb meem kev ua haujlwm lossis cov teeb meem airing. Qhov kev sib txuas ntawm HPMC tuaj yeem ncua cov txheej txheem kev laus no, yog li txhim kho lub durability ntawm cov nplaum ntawm cov khoom siv hnyav thiab ua rau lawv cov nyhuv ua kev sib tw ntev.
8. Txhim Kho Kev Ua Haujlwm Ib Ncig
Nrog rau kev txhim kho txuas ntxiv ntawm cov kev tiv thaiv ib puag ncig, muaj cov nplaum muaj kev tiv thaiv hauv kev tiv thaiv ntawm ntsuab ib puag ncig. HPMC, raws li cov tsis muaj tshuaj lom thiab biodegradable cov ntaub ntawv, ua tau raws li cov qauv ib puag ncig. Nws daim ntawv thov tsis tuaj yeem txhim kho kev ua tau zoo ntawm cov nplaum, tab sis kuj txo qhov cuam tshuam ntawm ib puag ncig. Kev siv HPMC hauv cov nplaum uas txo cov tshuaj pleev cov khoom siv organic, yog li txo qhov kev xav tau ntawm cov khoom lag luam niaj hnub no.
Raws li kev ua haujlwm tseem ceeb ntxiv, HPMC tau siv dav hauv cov nplaum muaj. Los ntawm nws zoo heev viscosity kev hloov kho, thickening, viscosity hloov kho cov khoom, txhim kho lawv cov haujlwm ua haujlwm, kev tiv thaiv ruaj khov thiab ib puag ncig. Nyob rau hauv lub neej tom ntej nplaum tsim qauv, HPMC yuav txuas ntxiv mus ua txoj haujlwm tseem ceeb, ntxiv txhawb kev lag luam nplaum ntawm kev tiv thaiv zoo, ib puag ncig kev tiv thaiv thiab kev txhim kho kom ruaj khov.
Lub Sijhawm Post: Feb-17-2025